ide_db/generated/
lints.rs

1//! Generated by `cargo xtask codegen lint-definitions`, do not edit by hand.
2
3use span::Edition;
4
5use crate::Severity;
6
7#[derive(Clone)]
8pub struct Lint {
9    pub label: &'static str,
10    pub description: &'static str,
11    pub default_severity: Severity,
12    pub warn_since: Option<Edition>,
13    pub deny_since: Option<Edition>,
14}
15
16pub struct LintGroup {
17    pub lint: Lint,
18    pub children: &'static [&'static str],
19}
20
21pub const DEFAULT_LINTS: &[Lint] = &[
22    Lint {
23        label: "aarch64_softfloat_neon",
24        description: r##"detects code that could be affected by ABI issues on aarch64 softfloat targets"##,
25        default_severity: Severity::Warning,
26        warn_since: None,
27        deny_since: None,
28    },
29    Lint {
30        label: "absolute_paths_not_starting_with_crate",
31        description: r##"fully qualified paths that start with a module name instead of `crate`, `self`, or an extern crate name"##,
32        default_severity: Severity::Allow,
33        warn_since: None,
34        deny_since: None,
35    },
36    Lint {
37        label: "ambiguous_associated_items",
38        description: r##"ambiguous associated items"##,
39        default_severity: Severity::Error,
40        warn_since: None,
41        deny_since: None,
42    },
43    Lint {
44        label: "ambiguous_derive_helpers",
45        description: r##"detects derive helper attributes that are ambiguous with built-in attributes"##,
46        default_severity: Severity::Warning,
47        warn_since: None,
48        deny_since: None,
49    },
50    Lint {
51        label: "ambiguous_glob_imported_traits",
52        description: r##"detects uses of ambiguously glob imported traits"##,
53        default_severity: Severity::Warning,
54        warn_since: None,
55        deny_since: None,
56    },
57    Lint {
58        label: "ambiguous_glob_imports",
59        description: r##"detects certain glob imports that require reporting an ambiguity error"##,
60        default_severity: Severity::Error,
61        warn_since: None,
62        deny_since: None,
63    },
64    Lint {
65        label: "ambiguous_glob_reexports",
66        description: r##"ambiguous glob re-exports"##,
67        default_severity: Severity::Warning,
68        warn_since: None,
69        deny_since: None,
70    },
71    Lint {
72        label: "ambiguous_import_visibilities",
73        description: r##"detects certain glob imports that require reporting an ambiguity error"##,
74        default_severity: Severity::Warning,
75        warn_since: None,
76        deny_since: None,
77    },
78    Lint {
79        label: "ambiguous_negative_literals",
80        description: r##"ambiguous negative literals operations"##,
81        default_severity: Severity::Allow,
82        warn_since: None,
83        deny_since: None,
84    },
85    Lint {
86        label: "ambiguous_panic_imports",
87        description: r##"detects ambiguous core and std panic imports"##,
88        default_severity: Severity::Warning,
89        warn_since: None,
90        deny_since: None,
91    },
92    Lint {
93        label: "ambiguous_wide_pointer_comparisons",
94        description: r##"detects ambiguous wide pointer comparisons"##,
95        default_severity: Severity::Warning,
96        warn_since: None,
97        deny_since: None,
98    },
99    Lint {
100        label: "anonymous_parameters",
101        description: r##"detects anonymous parameters"##,
102        default_severity: Severity::Warning,
103        warn_since: None,
104        deny_since: None,
105    },
106    Lint {
107        label: "arithmetic_overflow",
108        description: r##"arithmetic operation overflows"##,
109        default_severity: Severity::Error,
110        warn_since: None,
111        deny_since: None,
112    },
113    Lint {
114        label: "array_into_iter",
115        description: r##"detects calling `into_iter` on arrays in Rust 2015 and 2018"##,
116        default_severity: Severity::Warning,
117        warn_since: None,
118        deny_since: None,
119    },
120    Lint {
121        label: "asm_sub_register",
122        description: r##"using only a subset of a register for inline asm inputs"##,
123        default_severity: Severity::Warning,
124        warn_since: None,
125        deny_since: None,
126    },
127    Lint {
128        label: "async_fn_in_trait",
129        description: r##"use of `async fn` in definition of a publicly-reachable trait"##,
130        default_severity: Severity::Warning,
131        warn_since: None,
132        deny_since: None,
133    },
134    Lint {
135        label: "bad_asm_style",
136        description: r##"incorrect use of inline assembly"##,
137        default_severity: Severity::Warning,
138        warn_since: None,
139        deny_since: None,
140    },
141    Lint {
142        label: "bare_trait_objects",
143        description: r##"suggest using `dyn Trait` for trait objects"##,
144        default_severity: Severity::Warning,
145        warn_since: None,
146        deny_since: None,
147    },
148    Lint {
149        label: "binary_asm_labels",
150        description: r##"labels in inline assembly containing only 0 or 1 digits"##,
151        default_severity: Severity::Error,
152        warn_since: None,
153        deny_since: None,
154    },
155    Lint {
156        label: "bindings_with_variant_name",
157        description: r##"detects pattern bindings with the same name as one of the matched variants"##,
158        default_severity: Severity::Error,
159        warn_since: None,
160        deny_since: None,
161    },
162    Lint {
163        label: "boxed_slice_into_iter",
164        description: r##"detects calling `into_iter` on boxed slices in Rust 2015, 2018, and 2021"##,
165        default_severity: Severity::Warning,
166        warn_since: None,
167        deny_since: None,
168    },
169    Lint {
170        label: "break_with_label_and_loop",
171        description: r##"`break` expression with label and unlabeled loop as value expression"##,
172        default_severity: Severity::Warning,
173        warn_since: None,
174        deny_since: None,
175    },
176    Lint {
177        label: "clashing_extern_declarations",
178        description: r##"detects when an extern fn has been declared with the same name but different types"##,
179        default_severity: Severity::Warning,
180        warn_since: None,
181        deny_since: None,
182    },
183    Lint {
184        label: "closure_returning_async_block",
185        description: r##"closure that returns `async {}` could be rewritten as an async closure"##,
186        default_severity: Severity::Allow,
187        warn_since: None,
188        deny_since: None,
189    },
190    Lint {
191        label: "coherence_leak_check",
192        description: r##"distinct impls distinguished only by the leak-check code"##,
193        default_severity: Severity::Warning,
194        warn_since: None,
195        deny_since: None,
196    },
197    Lint {
198        label: "conflicting_repr_hints",
199        description: r##"conflicts between `#[repr(..)]` hints that were previously accepted and used in practice"##,
200        default_severity: Severity::Error,
201        warn_since: None,
202        deny_since: None,
203    },
204    Lint {
205        label: "confusable_idents",
206        description: r##"detects visually confusable pairs between identifiers"##,
207        default_severity: Severity::Warning,
208        warn_since: None,
209        deny_since: None,
210    },
211    Lint {
212        label: "const_evaluatable_unchecked",
213        description: r##"detects a generic constant is used in a type without a emitting a warning"##,
214        default_severity: Severity::Warning,
215        warn_since: None,
216        deny_since: None,
217    },
218    Lint {
219        label: "const_item_interior_mutations",
220        description: r##"checks for calls which mutates a interior mutable const-item"##,
221        default_severity: Severity::Warning,
222        warn_since: None,
223        deny_since: None,
224    },
225    Lint {
226        label: "const_item_mutation",
227        description: r##"detects attempts to mutate a `const` item"##,
228        default_severity: Severity::Warning,
229        warn_since: None,
230        deny_since: None,
231    },
232    Lint {
233        label: "dangerous_implicit_autorefs",
234        description: r##"implicit reference to a dereference of a raw pointer"##,
235        default_severity: Severity::Error,
236        warn_since: None,
237        deny_since: None,
238    },
239    Lint {
240        label: "dangling_pointers_from_locals",
241        description: r##"detects returning a pointer from a local variable"##,
242        default_severity: Severity::Warning,
243        warn_since: None,
244        deny_since: None,
245    },
246    Lint {
247        label: "dangling_pointers_from_temporaries",
248        description: r##"detects getting a pointer from a temporary"##,
249        default_severity: Severity::Warning,
250        warn_since: None,
251        deny_since: None,
252    },
253    Lint {
254        label: "dead_code",
255        description: r##"detect unused, unexported items"##,
256        default_severity: Severity::Warning,
257        warn_since: None,
258        deny_since: None,
259    },
260    Lint {
261        label: "dead_code_pub_in_binary",
262        description: r##"detect public items in executable crates that are never used"##,
263        default_severity: Severity::Allow,
264        warn_since: None,
265        deny_since: None,
266    },
267    Lint {
268        label: "default_overrides_default_fields",
269        description: r##"detect `Default` impl that should use the type's default field values"##,
270        default_severity: Severity::Error,
271        warn_since: None,
272        deny_since: None,
273    },
274    Lint {
275        label: "dependency_on_unit_never_type_fallback",
276        description: r##"never type fallback affecting unsafe function calls"##,
277        default_severity: Severity::Error,
278        warn_since: None,
279        deny_since: None,
280    },
281    Lint {
282        label: "deprecated",
283        description: r##"detects use of deprecated items"##,
284        default_severity: Severity::Warning,
285        warn_since: None,
286        deny_since: None,
287    },
288    Lint {
289        label: "deprecated_in_future",
290        description: r##"detects use of items that will be deprecated in a future version"##,
291        default_severity: Severity::Allow,
292        warn_since: None,
293        deny_since: None,
294    },
295    Lint {
296        label: "deprecated_llvm_intrinsic",
297        description: r##"detects uses of deprecated LLVM intrinsics"##,
298        default_severity: Severity::Allow,
299        warn_since: None,
300        deny_since: None,
301    },
302    Lint {
303        label: "deprecated_safe_2024",
304        description: r##"detects unsafe functions being used as safe functions"##,
305        default_severity: Severity::Allow,
306        warn_since: None,
307        deny_since: None,
308    },
309    Lint {
310        label: "deprecated_where_clause_location",
311        description: r##"deprecated where clause location"##,
312        default_severity: Severity::Warning,
313        warn_since: None,
314        deny_since: None,
315    },
316    Lint {
317        label: "deref_into_dyn_supertrait",
318        description: r##"`Deref` implementation with a supertrait trait object for output is shadowed by trait upcasting"##,
319        default_severity: Severity::Allow,
320        warn_since: None,
321        deny_since: None,
322    },
323    Lint {
324        label: "deref_nullptr",
325        description: r##"detects when an null pointer is dereferenced"##,
326        default_severity: Severity::Error,
327        warn_since: None,
328        deny_since: None,
329    },
330    Lint {
331        label: "double_negations",
332        description: r##"detects expressions of the form `--x`"##,
333        default_severity: Severity::Warning,
334        warn_since: None,
335        deny_since: None,
336    },
337    Lint {
338        label: "drop_bounds",
339        description: r##"bounds of the form `T: Drop` are most likely incorrect"##,
340        default_severity: Severity::Warning,
341        warn_since: None,
342        deny_since: None,
343    },
344    Lint {
345        label: "dropping_copy_types",
346        description: r##"calls to `std::mem::drop` with a value that implements Copy"##,
347        default_severity: Severity::Warning,
348        warn_since: None,
349        deny_since: None,
350    },
351    Lint {
352        label: "dropping_references",
353        description: r##"calls to `std::mem::drop` with a reference instead of an owned value"##,
354        default_severity: Severity::Warning,
355        warn_since: None,
356        deny_since: None,
357    },
358    Lint {
359        label: "duplicate_features",
360        description: r##"duplicate features found in crate-level `#[feature]` directives"##,
361        default_severity: Severity::Error,
362        warn_since: None,
363        deny_since: None,
364    },
365    Lint {
366        label: "duplicate_macro_attributes",
367        description: r##"duplicated attribute"##,
368        default_severity: Severity::Warning,
369        warn_since: None,
370        deny_since: None,
371    },
372    Lint {
373        label: "dyn_drop",
374        description: r##"trait objects of the form `dyn Drop` are useless"##,
375        default_severity: Severity::Warning,
376        warn_since: None,
377        deny_since: None,
378    },
379    Lint {
380        label: "edition_2024_expr_fragment_specifier",
381        description: r##"The `expr` fragment specifier will accept more expressions in the 2024 edition. To keep the existing behavior, use the `expr_2021` fragment specifier."##,
382        default_severity: Severity::Allow,
383        warn_since: None,
384        deny_since: None,
385    },
386    Lint {
387        label: "elided_lifetimes_in_associated_constant",
388        description: r##"elided lifetimes cannot be used in associated constants in impls"##,
389        default_severity: Severity::Error,
390        warn_since: None,
391        deny_since: None,
392    },
393    Lint {
394        label: "elided_lifetimes_in_paths",
395        description: r##"hidden lifetime parameters in types are deprecated"##,
396        default_severity: Severity::Allow,
397        warn_since: None,
398        deny_since: None,
399    },
400    Lint {
401        label: "ellipsis_inclusive_range_patterns",
402        description: r##"`...` range patterns are deprecated"##,
403        default_severity: Severity::Warning,
404        warn_since: None,
405        deny_since: None,
406    },
407    Lint {
408        label: "enum_intrinsics_non_enums",
409        description: r##"detects calls to `core::mem::discriminant` and `core::mem::variant_count` with non-enum types"##,
410        default_severity: Severity::Error,
411        warn_since: None,
412        deny_since: None,
413    },
414    Lint {
415        label: "explicit_builtin_cfgs_in_flags",
416        description: r##"detects builtin cfgs set via the `--cfg`"##,
417        default_severity: Severity::Error,
418        warn_since: None,
419        deny_since: None,
420    },
421    Lint {
422        label: "explicit_outlives_requirements",
423        description: r##"outlives requirements can be inferred"##,
424        default_severity: Severity::Allow,
425        warn_since: None,
426        deny_since: None,
427    },
428    Lint {
429        label: "exported_private_dependencies",
430        description: r##"public interface leaks type from a private dependency"##,
431        default_severity: Severity::Warning,
432        warn_since: None,
433        deny_since: None,
434    },
435    Lint {
436        label: "ffi_unwind_calls",
437        description: r##"call to foreign functions or function pointers with FFI-unwind ABI"##,
438        default_severity: Severity::Allow,
439        warn_since: None,
440        deny_since: None,
441    },
442    Lint {
443        label: "float_literal_f32_fallback",
444        description: r##"detects unsuffixed floating point literals whose type fallback to `f32`"##,
445        default_severity: Severity::Warning,
446        warn_since: None,
447        deny_since: None,
448    },
449    Lint {
450        label: "for_loops_over_fallibles",
451        description: r##"for-looping over an `Option` or a `Result`, which is more clearly expressed as an `if let`"##,
452        default_severity: Severity::Warning,
453        warn_since: None,
454        deny_since: None,
455    },
456    Lint {
457        label: "forbidden_lint_groups",
458        description: r##"applying forbid to lint-groups"##,
459        default_severity: Severity::Warning,
460        warn_since: None,
461        deny_since: None,
462    },
463    Lint {
464        label: "forgetting_copy_types",
465        description: r##"calls to `std::mem::forget` with a value that implements Copy"##,
466        default_severity: Severity::Warning,
467        warn_since: None,
468        deny_since: None,
469    },
470    Lint {
471        label: "forgetting_references",
472        description: r##"calls to `std::mem::forget` with a reference instead of an owned value"##,
473        default_severity: Severity::Warning,
474        warn_since: None,
475        deny_since: None,
476    },
477    Lint {
478        label: "function_casts_as_integer",
479        description: r##"casting a function into an integer"##,
480        default_severity: Severity::Warning,
481        warn_since: None,
482        deny_since: None,
483    },
484    Lint {
485        label: "function_item_references",
486        description: r##"suggest casting to a function pointer when attempting to take references to function items"##,
487        default_severity: Severity::Warning,
488        warn_since: None,
489        deny_since: None,
490    },
491    Lint {
492        label: "fuzzy_provenance_casts",
493        description: r##"a fuzzy integer to pointer cast is used"##,
494        default_severity: Severity::Allow,
495        warn_since: None,
496        deny_since: None,
497    },
498    Lint {
499        label: "hidden_glob_reexports",
500        description: r##"name introduced by a private item shadows a name introduced by a public glob re-export"##,
501        default_severity: Severity::Warning,
502        warn_since: None,
503        deny_since: None,
504    },
505    Lint {
506        label: "if_let_rescope",
507        description: r##"`if let` assigns a shorter lifetime to temporary values being pattern-matched against in Edition 2024 and rewriting in `match` is an option to preserve the semantics up to Edition 2021"##,
508        default_severity: Severity::Allow,
509        warn_since: None,
510        deny_since: None,
511    },
512    Lint {
513        label: "ill_formed_attribute_input",
514        description: r##"ill-formed attribute inputs that were previously accepted and used in practice"##,
515        default_severity: Severity::Error,
516        warn_since: None,
517        deny_since: None,
518    },
519    Lint {
520        label: "impl_trait_overcaptures",
521        description: r##"`impl Trait` will capture more lifetimes than possibly intended in edition 2024"##,
522        default_severity: Severity::Allow,
523        warn_since: None,
524        deny_since: None,
525    },
526    Lint {
527        label: "impl_trait_redundant_captures",
528        description: r##"redundant precise-capturing `use<...>` syntax on an `impl Trait`"##,
529        default_severity: Severity::Allow,
530        warn_since: None,
531        deny_since: None,
532    },
533    Lint {
534        label: "improper_ctypes",
535        description: r##"proper use of libc types in foreign modules"##,
536        default_severity: Severity::Warning,
537        warn_since: None,
538        deny_since: None,
539    },
540    Lint {
541        label: "improper_ctypes_definitions",
542        description: r##"proper use of libc types in foreign item definitions"##,
543        default_severity: Severity::Warning,
544        warn_since: None,
545        deny_since: None,
546    },
547    Lint {
548        label: "improper_gpu_kernel_arg",
549        description: r##"GPU kernel entry points have a limited ABI"##,
550        default_severity: Severity::Warning,
551        warn_since: None,
552        deny_since: None,
553    },
554    Lint {
555        label: "incomplete_features",
556        description: r##"incomplete features that may function improperly in some or all cases"##,
557        default_severity: Severity::Warning,
558        warn_since: None,
559        deny_since: None,
560    },
561    Lint {
562        label: "incomplete_include",
563        description: r##"trailing content in included file"##,
564        default_severity: Severity::Error,
565        warn_since: None,
566        deny_since: None,
567    },
568    Lint {
569        label: "ineffective_unstable_trait_impl",
570        description: r##"detects `#[unstable]` on stable trait implementations for stable types"##,
571        default_severity: Severity::Error,
572        warn_since: None,
573        deny_since: None,
574    },
575    Lint {
576        label: "inline_always_mismatching_target_features",
577        description: r##"detects when a function annotated with `#[inline(always)]` and `#[target_feature(enable = "..")]` is inlined into a caller without the required target feature"##,
578        default_severity: Severity::Warning,
579        warn_since: None,
580        deny_since: None,
581    },
582    Lint {
583        label: "inline_no_sanitize",
584        description: r##"detects incompatible use of `#[inline(always)]` and `#[sanitize(... = "off")]`"##,
585        default_severity: Severity::Warning,
586        warn_since: None,
587        deny_since: None,
588    },
589    Lint {
590        label: "integer_to_ptr_transmutes",
591        description: r##"detects integer to pointer transmutes"##,
592        default_severity: Severity::Warning,
593        warn_since: None,
594        deny_since: None,
595    },
596    Lint {
597        label: "internal_eq_trait_method_impls",
598        description: r##"manual implementation of the internal `Eq::assert_receiver_is_total_eq` method"##,
599        default_severity: Severity::Warning,
600        warn_since: None,
601        deny_since: None,
602    },
603    Lint {
604        label: "internal_features",
605        description: r##"internal features are not supposed to be used"##,
606        default_severity: Severity::Warning,
607        warn_since: None,
608        deny_since: None,
609    },
610    Lint {
611        label: "invalid_atomic_ordering",
612        description: r##"usage of invalid atomic ordering in atomic operations and memory fences"##,
613        default_severity: Severity::Error,
614        warn_since: None,
615        deny_since: None,
616    },
617    Lint {
618        label: "invalid_doc_attributes",
619        description: r##"detects invalid `#[doc(...)]` attributes"##,
620        default_severity: Severity::Warning,
621        warn_since: None,
622        deny_since: None,
623    },
624    Lint {
625        label: "invalid_from_utf8",
626        description: r##"using a non UTF-8 literal in `std::str::from_utf8`"##,
627        default_severity: Severity::Warning,
628        warn_since: None,
629        deny_since: None,
630    },
631    Lint {
632        label: "invalid_from_utf8_unchecked",
633        description: r##"using a non UTF-8 literal in `std::str::from_utf8_unchecked`"##,
634        default_severity: Severity::Error,
635        warn_since: None,
636        deny_since: None,
637    },
638    Lint {
639        label: "invalid_macro_export_arguments",
640        description: r##""invalid_parameter" isn't a valid argument for `#[macro_export]`"##,
641        default_severity: Severity::Error,
642        warn_since: None,
643        deny_since: None,
644    },
645    Lint {
646        label: "invalid_nan_comparisons",
647        description: r##"detects invalid floating point NaN comparisons"##,
648        default_severity: Severity::Warning,
649        warn_since: None,
650        deny_since: None,
651    },
652    Lint {
653        label: "invalid_null_arguments",
654        description: r##"invalid null pointer in arguments"##,
655        default_severity: Severity::Error,
656        warn_since: None,
657        deny_since: None,
658    },
659    Lint {
660        label: "invalid_reference_casting",
661        description: r##"casts of `&T` to `&mut T` without interior mutability"##,
662        default_severity: Severity::Error,
663        warn_since: None,
664        deny_since: None,
665    },
666    Lint {
667        label: "invalid_type_param_default",
668        description: r##"type parameter default erroneously allowed in invalid location"##,
669        default_severity: Severity::Error,
670        warn_since: None,
671        deny_since: None,
672    },
673    Lint {
674        label: "invalid_value",
675        description: r##"an invalid value is being created (such as a null reference)"##,
676        default_severity: Severity::Warning,
677        warn_since: None,
678        deny_since: None,
679    },
680    Lint {
681        label: "irrefutable_let_patterns",
682        description: r##"detects irrefutable patterns in `if let` and `while let` statements"##,
683        default_severity: Severity::Warning,
684        warn_since: None,
685        deny_since: None,
686    },
687    Lint {
688        label: "keyword_idents_2018",
689        description: r##"detects edition keywords being used as an identifier"##,
690        default_severity: Severity::Allow,
691        warn_since: None,
692        deny_since: None,
693    },
694    Lint {
695        label: "keyword_idents_2024",
696        description: r##"detects edition keywords being used as an identifier"##,
697        default_severity: Severity::Allow,
698        warn_since: None,
699        deny_since: None,
700    },
701    Lint {
702        label: "large_assignments",
703        description: r##"detects large moves or copies"##,
704        default_severity: Severity::Warning,
705        warn_since: None,
706        deny_since: None,
707    },
708    Lint {
709        label: "late_bound_lifetime_arguments",
710        description: r##"detects generic lifetime arguments in path segments with late bound lifetime parameters"##,
711        default_severity: Severity::Warning,
712        warn_since: None,
713        deny_since: None,
714    },
715    Lint {
716        label: "legacy_derive_helpers",
717        description: r##"detects derive helper attributes that are used before they are introduced"##,
718        default_severity: Severity::Error,
719        warn_since: None,
720        deny_since: None,
721    },
722    Lint {
723        label: "let_underscore_drop",
724        description: r##"non-binding let on a type that has a destructor"##,
725        default_severity: Severity::Allow,
726        warn_since: None,
727        deny_since: None,
728    },
729    Lint {
730        label: "let_underscore_lock",
731        description: r##"non-binding let on a synchronization lock"##,
732        default_severity: Severity::Error,
733        warn_since: None,
734        deny_since: None,
735    },
736    Lint {
737        label: "linker_info",
738        description: r##"linker warnings known to be informational-only and not indicative of a problem"##,
739        default_severity: Severity::Allow,
740        warn_since: None,
741        deny_since: None,
742    },
743    Lint {
744        label: "linker_messages",
745        description: r##"warnings emitted at runtime by the target-specific linker program"##,
746        default_severity: Severity::Warning,
747        warn_since: None,
748        deny_since: None,
749    },
750    Lint {
751        label: "long_running_const_eval",
752        description: r##"detects long const eval operations"##,
753        default_severity: Severity::Error,
754        warn_since: None,
755        deny_since: None,
756    },
757    Lint {
758        label: "lossy_provenance_casts",
759        description: r##"a lossy pointer to integer cast is used"##,
760        default_severity: Severity::Allow,
761        warn_since: None,
762        deny_since: None,
763    },
764    Lint {
765        label: "macro_expanded_macro_exports_accessed_by_absolute_paths",
766        description: r##"macro-expanded `macro_export` macros from the current crate cannot be referred to by absolute paths"##,
767        default_severity: Severity::Error,
768        warn_since: None,
769        deny_since: None,
770    },
771    Lint {
772        label: "macro_use_extern_crate",
773        description: r##"the `#[macro_use]` attribute is now deprecated in favor of using macros via the module system"##,
774        default_severity: Severity::Allow,
775        warn_since: None,
776        deny_since: None,
777    },
778    Lint {
779        label: "malformed_diagnostic_attributes",
780        description: r##"detects malformed diagnostic attributes"##,
781        default_severity: Severity::Warning,
782        warn_since: None,
783        deny_since: None,
784    },
785    Lint {
786        label: "malformed_diagnostic_format_literals",
787        description: r##"detects diagnostic attribute with malformed diagnostic format literals"##,
788        default_severity: Severity::Warning,
789        warn_since: None,
790        deny_since: None,
791    },
792    Lint {
793        label: "map_unit_fn",
794        description: r##"`Iterator::map` call that discard the iterator's values"##,
795        default_severity: Severity::Warning,
796        warn_since: None,
797        deny_since: None,
798    },
799    Lint {
800        label: "meta_variable_misuse",
801        description: r##"possible meta-variable misuse at macro definition"##,
802        default_severity: Severity::Allow,
803        warn_since: None,
804        deny_since: None,
805    },
806    Lint {
807        label: "mismatched_lifetime_syntaxes",
808        description: r##"detects when a lifetime uses different syntax between arguments and return values"##,
809        default_severity: Severity::Warning,
810        warn_since: None,
811        deny_since: None,
812    },
813    Lint {
814        label: "misplaced_diagnostic_attributes",
815        description: r##"detects diagnostic attributes that are placed on the wrong item"##,
816        default_severity: Severity::Warning,
817        warn_since: None,
818        deny_since: None,
819    },
820    Lint {
821        label: "missing_abi",
822        description: r##"No declared ABI for extern declaration"##,
823        default_severity: Severity::Warning,
824        warn_since: None,
825        deny_since: None,
826    },
827    Lint {
828        label: "missing_copy_implementations",
829        description: r##"detects potentially-forgotten implementations of `Copy`"##,
830        default_severity: Severity::Allow,
831        warn_since: None,
832        deny_since: None,
833    },
834    Lint {
835        label: "missing_debug_implementations",
836        description: r##"detects missing implementations of Debug"##,
837        default_severity: Severity::Allow,
838        warn_since: None,
839        deny_since: None,
840    },
841    Lint {
842        label: "missing_docs",
843        description: r##"detects missing documentation for public members"##,
844        default_severity: Severity::Allow,
845        warn_since: None,
846        deny_since: None,
847    },
848    Lint {
849        label: "missing_gpu_kernel_export_name",
850        description: r##"mangled gpu-kernel function"##,
851        default_severity: Severity::Warning,
852        warn_since: None,
853        deny_since: None,
854    },
855    Lint {
856        label: "missing_unsafe_on_extern",
857        description: r##"detects missing unsafe keyword on extern declarations"##,
858        default_severity: Severity::Allow,
859        warn_since: None,
860        deny_since: None,
861    },
862    Lint {
863        label: "mixed_script_confusables",
864        description: r##"detects Unicode scripts whose mixed script confusables codepoints are solely used"##,
865        default_severity: Severity::Warning,
866        warn_since: None,
867        deny_since: None,
868    },
869    Lint {
870        label: "multiple_supertrait_upcastable",
871        description: r##"detect when a dyn-compatible trait has multiple supertraits"##,
872        default_severity: Severity::Allow,
873        warn_since: None,
874        deny_since: None,
875    },
876    Lint {
877        label: "must_not_suspend",
878        description: r##"use of a `#[must_not_suspend]` value across a yield point"##,
879        default_severity: Severity::Allow,
880        warn_since: None,
881        deny_since: None,
882    },
883    Lint {
884        label: "mutable_transmutes",
885        description: r##"transmuting &T to &mut T is undefined behavior, even if the reference is unused"##,
886        default_severity: Severity::Error,
887        warn_since: None,
888        deny_since: None,
889    },
890    Lint {
891        label: "named_arguments_used_positionally",
892        description: r##"named arguments in format used positionally"##,
893        default_severity: Severity::Warning,
894        warn_since: None,
895        deny_since: None,
896    },
897    Lint {
898        label: "named_asm_labels",
899        description: r##"named labels in inline assembly"##,
900        default_severity: Severity::Error,
901        warn_since: None,
902        deny_since: None,
903    },
904    Lint {
905        label: "never_type_fallback_flowing_into_unsafe",
906        description: r##"never type fallback affecting unsafe function calls"##,
907        default_severity: Severity::Error,
908        warn_since: None,
909        deny_since: None,
910    },
911    Lint {
912        label: "no_mangle_const_items",
913        description: r##"const items will not have their symbols exported"##,
914        default_severity: Severity::Error,
915        warn_since: None,
916        deny_since: None,
917    },
918    Lint {
919        label: "no_mangle_generic_items",
920        description: r##"generic items must be mangled"##,
921        default_severity: Severity::Warning,
922        warn_since: None,
923        deny_since: None,
924    },
925    Lint {
926        label: "non_ascii_idents",
927        description: r##"detects non-ASCII identifiers"##,
928        default_severity: Severity::Allow,
929        warn_since: None,
930        deny_since: None,
931    },
932    Lint {
933        label: "non_camel_case_types",
934        description: r##"types, variants, traits and type parameters should have camel case names"##,
935        default_severity: Severity::Warning,
936        warn_since: None,
937        deny_since: None,
938    },
939    Lint {
940        label: "non_contiguous_range_endpoints",
941        description: r##"detects off-by-one errors with exclusive range patterns"##,
942        default_severity: Severity::Warning,
943        warn_since: None,
944        deny_since: None,
945    },
946    Lint {
947        label: "non_exhaustive_omitted_patterns",
948        description: r##"detect when patterns of types marked `non_exhaustive` are missed"##,
949        default_severity: Severity::Allow,
950        warn_since: None,
951        deny_since: None,
952    },
953    Lint {
954        label: "non_fmt_panics",
955        description: r##"detect single-argument panic!() invocations in which the argument is not a format string"##,
956        default_severity: Severity::Warning,
957        warn_since: None,
958        deny_since: None,
959    },
960    Lint {
961        label: "non_local_definitions",
962        description: r##"checks for non-local definitions"##,
963        default_severity: Severity::Warning,
964        warn_since: None,
965        deny_since: None,
966    },
967    Lint {
968        label: "non_shorthand_field_patterns",
969        description: r##"using `Struct { x: x }` instead of `Struct { x }` in a pattern"##,
970        default_severity: Severity::Warning,
971        warn_since: None,
972        deny_since: None,
973    },
974    Lint {
975        label: "non_snake_case",
976        description: r##"variables, methods, functions, lifetime parameters and modules should have snake case names"##,
977        default_severity: Severity::Warning,
978        warn_since: None,
979        deny_since: None,
980    },
981    Lint {
982        label: "non_upper_case_globals",
983        description: r##"static constants should have uppercase identifiers"##,
984        default_severity: Severity::Warning,
985        warn_since: None,
986        deny_since: None,
987    },
988    Lint {
989        label: "noop_method_call",
990        description: r##"detects the use of well-known noop methods"##,
991        default_severity: Severity::Warning,
992        warn_since: None,
993        deny_since: None,
994    },
995    Lint {
996        label: "opaque_hidden_inferred_bound",
997        description: r##"detects the use of nested `impl Trait` types in associated type bounds that are not general enough"##,
998        default_severity: Severity::Warning,
999        warn_since: None,
1000        deny_since: None,
1001    },
1002    Lint {
1003        label: "out_of_scope_macro_calls",
1004        description: r##"detects out of scope calls to `macro_rules` in key-value attributes"##,
1005        default_severity: Severity::Error,
1006        warn_since: None,
1007        deny_since: None,
1008    },
1009    Lint {
1010        label: "overflowing_literals",
1011        description: r##"literal out of range for its type"##,
1012        default_severity: Severity::Error,
1013        warn_since: None,
1014        deny_since: None,
1015    },
1016    Lint {
1017        label: "overlapping_range_endpoints",
1018        description: r##"detects range patterns with overlapping endpoints"##,
1019        default_severity: Severity::Warning,
1020        warn_since: None,
1021        deny_since: None,
1022    },
1023    Lint {
1024        label: "path_statements",
1025        description: r##"path statements with no effect"##,
1026        default_severity: Severity::Warning,
1027        warn_since: None,
1028        deny_since: None,
1029    },
1030    Lint {
1031        label: "patterns_in_fns_without_body",
1032        description: r##"patterns in functions without body were erroneously allowed"##,
1033        default_severity: Severity::Error,
1034        warn_since: None,
1035        deny_since: None,
1036    },
1037    Lint {
1038        label: "private_bounds",
1039        description: r##"private type in secondary interface of an item"##,
1040        default_severity: Severity::Warning,
1041        warn_since: None,
1042        deny_since: None,
1043    },
1044    Lint {
1045        label: "private_interfaces",
1046        description: r##"private type in primary interface of an item"##,
1047        default_severity: Severity::Warning,
1048        warn_since: None,
1049        deny_since: None,
1050    },
1051    Lint {
1052        label: "proc_macro_derive_resolution_fallback",
1053        description: r##"detects proc macro derives using inaccessible names from parent modules"##,
1054        default_severity: Severity::Error,
1055        warn_since: None,
1056        deny_since: None,
1057    },
1058    Lint {
1059        label: "ptr_to_integer_transmute_in_consts",
1060        description: r##"detects pointer to integer transmutes in const functions and associated constants"##,
1061        default_severity: Severity::Warning,
1062        warn_since: None,
1063        deny_since: None,
1064    },
1065    Lint {
1066        label: "pub_use_of_private_extern_crate",
1067        description: r##"detect public re-exports of private extern crates"##,
1068        default_severity: Severity::Error,
1069        warn_since: None,
1070        deny_since: None,
1071    },
1072    Lint {
1073        label: "redundant_imports",
1074        description: r##"imports that are redundant due to being imported already"##,
1075        default_severity: Severity::Allow,
1076        warn_since: None,
1077        deny_since: None,
1078    },
1079    Lint {
1080        label: "redundant_lifetimes",
1081        description: r##"detects lifetime parameters that are redundant because they are equal to some other named lifetime"##,
1082        default_severity: Severity::Allow,
1083        warn_since: None,
1084        deny_since: None,
1085    },
1086    Lint {
1087        label: "redundant_semicolons",
1088        description: r##"detects unnecessary trailing semicolons"##,
1089        default_severity: Severity::Warning,
1090        warn_since: None,
1091        deny_since: None,
1092    },
1093    Lint {
1094        label: "refining_impl_trait_internal",
1095        description: r##"impl trait in impl method signature does not match trait method signature"##,
1096        default_severity: Severity::Warning,
1097        warn_since: None,
1098        deny_since: None,
1099    },
1100    Lint {
1101        label: "refining_impl_trait_reachable",
1102        description: r##"impl trait in impl method signature does not match trait method signature"##,
1103        default_severity: Severity::Warning,
1104        warn_since: None,
1105        deny_since: None,
1106    },
1107    Lint {
1108        label: "renamed_and_removed_lints",
1109        description: r##"lints that have been renamed or removed"##,
1110        default_severity: Severity::Warning,
1111        warn_since: None,
1112        deny_since: None,
1113    },
1114    Lint {
1115        label: "repr_c_enums_larger_than_int",
1116        description: r##"repr(C) enums with discriminant values that do not fit into a C int"##,
1117        default_severity: Severity::Warning,
1118        warn_since: None,
1119        deny_since: None,
1120    },
1121    Lint {
1122        label: "repr_transparent_non_zst_fields",
1123        description: r##"transparent type contains an external ZST that is marked #[non_exhaustive] or contains private fields"##,
1124        default_severity: Severity::Error,
1125        warn_since: None,
1126        deny_since: None,
1127    },
1128    Lint {
1129        label: "resolving_to_items_shadowing_supertrait_items",
1130        description: r##"detects when a supertrait item is shadowed by a subtrait item"##,
1131        default_severity: Severity::Allow,
1132        warn_since: None,
1133        deny_since: None,
1134    },
1135    Lint {
1136        label: "rtsan_nonblocking_async",
1137        description: r##"detects incompatible uses of `#[sanitize(realtime = "nonblocking")]` on async functions"##,
1138        default_severity: Severity::Warning,
1139        warn_since: None,
1140        deny_since: None,
1141    },
1142    Lint {
1143        label: "rust_2021_incompatible_closure_captures",
1144        description: r##"detects closures affected by Rust 2021 changes"##,
1145        default_severity: Severity::Allow,
1146        warn_since: None,
1147        deny_since: None,
1148    },
1149    Lint {
1150        label: "rust_2021_incompatible_or_patterns",
1151        description: r##"detects usage of old versions of or-patterns"##,
1152        default_severity: Severity::Allow,
1153        warn_since: None,
1154        deny_since: None,
1155    },
1156    Lint {
1157        label: "rust_2021_prefixes_incompatible_syntax",
1158        description: r##"identifiers that will be parsed as a prefix in Rust 2021"##,
1159        default_severity: Severity::Allow,
1160        warn_since: None,
1161        deny_since: None,
1162    },
1163    Lint {
1164        label: "rust_2021_prelude_collisions",
1165        description: r##"detects the usage of trait methods which are ambiguous with traits added to the prelude in future editions"##,
1166        default_severity: Severity::Allow,
1167        warn_since: None,
1168        deny_since: None,
1169    },
1170    Lint {
1171        label: "rust_2024_guarded_string_incompatible_syntax",
1172        description: r##"will be parsed as a guarded string in Rust 2024"##,
1173        default_severity: Severity::Allow,
1174        warn_since: None,
1175        deny_since: None,
1176    },
1177    Lint {
1178        label: "rust_2024_incompatible_pat",
1179        description: r##"detects patterns whose meaning will change in Rust 2024"##,
1180        default_severity: Severity::Allow,
1181        warn_since: None,
1182        deny_since: None,
1183    },
1184    Lint {
1185        label: "rust_2024_prelude_collisions",
1186        description: r##"detects the usage of trait methods which are ambiguous with traits added to the prelude in future editions"##,
1187        default_severity: Severity::Allow,
1188        warn_since: None,
1189        deny_since: None,
1190    },
1191    Lint {
1192        label: "self_constructor_from_outer_item",
1193        description: r##"detect unsupported use of `Self` from outer item"##,
1194        default_severity: Severity::Warning,
1195        warn_since: None,
1196        deny_since: None,
1197    },
1198    Lint {
1199        label: "semicolon_in_expressions_from_macros",
1200        description: r##"trailing semicolon in macro body used as expression"##,
1201        default_severity: Severity::Error,
1202        warn_since: None,
1203        deny_since: None,
1204    },
1205    Lint {
1206        label: "shadowing_supertrait_items",
1207        description: r##"detects when a supertrait item is shadowed by a subtrait item"##,
1208        default_severity: Severity::Allow,
1209        warn_since: None,
1210        deny_since: None,
1211    },
1212    Lint {
1213        label: "single_use_lifetimes",
1214        description: r##"detects lifetime parameters that are only used once"##,
1215        default_severity: Severity::Allow,
1216        warn_since: None,
1217        deny_since: None,
1218    },
1219    Lint {
1220        label: "special_module_name",
1221        description: r##"module declarations for files with a special meaning"##,
1222        default_severity: Severity::Warning,
1223        warn_since: None,
1224        deny_since: None,
1225    },
1226    Lint {
1227        label: "stable_features",
1228        description: r##"stable features found in `#[feature]` directive"##,
1229        default_severity: Severity::Warning,
1230        warn_since: None,
1231        deny_since: None,
1232    },
1233    Lint {
1234        label: "static_mut_refs",
1235        description: r##"creating a shared reference to mutable static"##,
1236        default_severity: Severity::Warning,
1237        warn_since: None,
1238        deny_since: Some(Edition::Edition2024),
1239    },
1240    Lint {
1241        label: "suspicious_double_ref_op",
1242        description: r##"suspicious call of trait method on `&&T`"##,
1243        default_severity: Severity::Warning,
1244        warn_since: None,
1245        deny_since: None,
1246    },
1247    Lint {
1248        label: "tail_call_track_caller",
1249        description: r##"detects tail calls of functions marked with `#[track_caller]`"##,
1250        default_severity: Severity::Warning,
1251        warn_since: None,
1252        deny_since: None,
1253    },
1254    Lint {
1255        label: "tail_expr_drop_order",
1256        description: r##"Detect and warn on significant change in drop order in tail expression location"##,
1257        default_severity: Severity::Allow,
1258        warn_since: None,
1259        deny_since: None,
1260    },
1261    Lint {
1262        label: "test_unstable_lint",
1263        description: r##"this unstable lint is only for testing"##,
1264        default_severity: Severity::Error,
1265        warn_since: None,
1266        deny_since: None,
1267    },
1268    Lint {
1269        label: "text_direction_codepoint_in_comment",
1270        description: r##"invisible directionality-changing codepoints in comment"##,
1271        default_severity: Severity::Error,
1272        warn_since: None,
1273        deny_since: None,
1274    },
1275    Lint {
1276        label: "text_direction_codepoint_in_literal",
1277        description: r##"detect special Unicode codepoints that affect the visual representation of text on screen, changing the direction in which text flows"##,
1278        default_severity: Severity::Error,
1279        warn_since: None,
1280        deny_since: None,
1281    },
1282    Lint {
1283        label: "trivial_bounds",
1284        description: r##"these bounds don't depend on an type parameters"##,
1285        default_severity: Severity::Warning,
1286        warn_since: None,
1287        deny_since: None,
1288    },
1289    Lint {
1290        label: "trivial_casts",
1291        description: r##"detects trivial casts which could be removed"##,
1292        default_severity: Severity::Allow,
1293        warn_since: None,
1294        deny_since: None,
1295    },
1296    Lint {
1297        label: "trivial_numeric_casts",
1298        description: r##"detects trivial casts of numeric types which could be removed"##,
1299        default_severity: Severity::Allow,
1300        warn_since: None,
1301        deny_since: None,
1302    },
1303    Lint {
1304        label: "type_alias_bounds",
1305        description: r##"bounds in type aliases are not enforced"##,
1306        default_severity: Severity::Warning,
1307        warn_since: None,
1308        deny_since: None,
1309    },
1310    Lint {
1311        label: "tyvar_behind_raw_pointer",
1312        description: r##"raw pointer to an inference variable"##,
1313        default_severity: Severity::Warning,
1314        warn_since: None,
1315        deny_since: None,
1316    },
1317    Lint {
1318        label: "uncommon_codepoints",
1319        description: r##"detects uncommon Unicode codepoints in identifiers"##,
1320        default_severity: Severity::Warning,
1321        warn_since: None,
1322        deny_since: None,
1323    },
1324    Lint {
1325        label: "unconditional_panic",
1326        description: r##"operation will cause a panic at runtime"##,
1327        default_severity: Severity::Error,
1328        warn_since: None,
1329        deny_since: None,
1330    },
1331    Lint {
1332        label: "unconditional_recursion",
1333        description: r##"functions that cannot return without calling themselves"##,
1334        default_severity: Severity::Warning,
1335        warn_since: None,
1336        deny_since: None,
1337    },
1338    Lint {
1339        label: "uncovered_param_in_projection",
1340        description: r##"impl contains type parameters that are not covered"##,
1341        default_severity: Severity::Warning,
1342        warn_since: None,
1343        deny_since: None,
1344    },
1345    Lint {
1346        label: "undropped_manually_drops",
1347        description: r##"calls to `std::mem::drop` with `std::mem::ManuallyDrop` instead of it's inner value"##,
1348        default_severity: Severity::Error,
1349        warn_since: None,
1350        deny_since: None,
1351    },
1352    Lint {
1353        label: "unexpected_cfgs",
1354        description: r##"detects unexpected names and values in `#[cfg]` conditions"##,
1355        default_severity: Severity::Warning,
1356        warn_since: None,
1357        deny_since: None,
1358    },
1359    Lint {
1360        label: "unfulfilled_lint_expectations",
1361        description: r##"unfulfilled lint expectation"##,
1362        default_severity: Severity::Warning,
1363        warn_since: None,
1364        deny_since: None,
1365    },
1366    Lint {
1367        label: "ungated_async_fn_track_caller",
1368        description: r##"enabling track_caller on an async fn is a no-op unless the async_fn_track_caller feature is enabled"##,
1369        default_severity: Severity::Warning,
1370        warn_since: None,
1371        deny_since: None,
1372    },
1373    Lint {
1374        label: "uninhabited_static",
1375        description: r##"uninhabited static"##,
1376        default_severity: Severity::Error,
1377        warn_since: None,
1378        deny_since: None,
1379    },
1380    Lint {
1381        label: "unit_bindings",
1382        description: r##"binding is useless because it has the unit `()` type"##,
1383        default_severity: Severity::Allow,
1384        warn_since: None,
1385        deny_since: None,
1386    },
1387    Lint {
1388        label: "unknown_crate_types",
1389        description: r##"unknown crate type found in `#[crate_type]` directive"##,
1390        default_severity: Severity::Error,
1391        warn_since: None,
1392        deny_since: None,
1393    },
1394    Lint {
1395        label: "unknown_diagnostic_attributes",
1396        description: r##"detects unknown diagnostic attributes"##,
1397        default_severity: Severity::Warning,
1398        warn_since: None,
1399        deny_since: None,
1400    },
1401    Lint {
1402        label: "unknown_lints",
1403        description: r##"unrecognized lint attribute"##,
1404        default_severity: Severity::Warning,
1405        warn_since: None,
1406        deny_since: None,
1407    },
1408    Lint {
1409        label: "unnameable_test_items",
1410        description: r##"detects an item that cannot be named being marked as `#[test_case]`"##,
1411        default_severity: Severity::Warning,
1412        warn_since: None,
1413        deny_since: None,
1414    },
1415    Lint {
1416        label: "unnameable_types",
1417        description: r##"effective visibility of a type is larger than the area in which it can be named"##,
1418        default_severity: Severity::Allow,
1419        warn_since: None,
1420        deny_since: None,
1421    },
1422    Lint {
1423        label: "unnecessary_transmutes",
1424        description: r##"detects transmutes that can also be achieved by other operations"##,
1425        default_severity: Severity::Warning,
1426        warn_since: None,
1427        deny_since: None,
1428    },
1429    Lint {
1430        label: "unpredictable_function_pointer_comparisons",
1431        description: r##"detects unpredictable function pointer comparisons"##,
1432        default_severity: Severity::Warning,
1433        warn_since: None,
1434        deny_since: None,
1435    },
1436    Lint {
1437        label: "unqualified_local_imports",
1438        description: r##"`use` of a local item without leading `self::`, `super::`, or `crate::`"##,
1439        default_severity: Severity::Allow,
1440        warn_since: None,
1441        deny_since: None,
1442    },
1443    Lint {
1444        label: "unreachable_cfg_select_predicates",
1445        description: r##"detects unreachable configuration predicates in the cfg_select macro"##,
1446        default_severity: Severity::Warning,
1447        warn_since: None,
1448        deny_since: None,
1449    },
1450    Lint {
1451        label: "unreachable_code",
1452        description: r##"detects unreachable code paths"##,
1453        default_severity: Severity::Warning,
1454        warn_since: None,
1455        deny_since: None,
1456    },
1457    Lint {
1458        label: "unreachable_patterns",
1459        description: r##"detects unreachable patterns"##,
1460        default_severity: Severity::Warning,
1461        warn_since: None,
1462        deny_since: None,
1463    },
1464    Lint {
1465        label: "unreachable_pub",
1466        description: r##"`pub` items not reachable from crate root"##,
1467        default_severity: Severity::Allow,
1468        warn_since: None,
1469        deny_since: None,
1470    },
1471    Lint {
1472        label: "unsafe_attr_outside_unsafe",
1473        description: r##"detects unsafe attributes outside of unsafe"##,
1474        default_severity: Severity::Allow,
1475        warn_since: None,
1476        deny_since: None,
1477    },
1478    Lint {
1479        label: "unsafe_code",
1480        description: r##"usage of `unsafe` code and other potentially unsound constructs"##,
1481        default_severity: Severity::Allow,
1482        warn_since: None,
1483        deny_since: None,
1484    },
1485    Lint {
1486        label: "unsafe_op_in_unsafe_fn",
1487        description: r##"unsafe operations in unsafe functions without an explicit unsafe block are deprecated"##,
1488        default_severity: Severity::Allow,
1489        warn_since: Some(Edition::Edition2024),
1490        deny_since: None,
1491    },
1492    Lint {
1493        label: "unstable_features",
1494        description: r##"enabling unstable features"##,
1495        default_severity: Severity::Allow,
1496        warn_since: None,
1497        deny_since: None,
1498    },
1499    Lint {
1500        label: "unstable_name_collisions",
1501        description: r##"detects name collision with an existing but unstable method"##,
1502        default_severity: Severity::Warning,
1503        warn_since: None,
1504        deny_since: None,
1505    },
1506    Lint {
1507        label: "unstable_syntax_pre_expansion",
1508        description: r##"unstable syntax can change at any point in the future, causing a hard error!"##,
1509        default_severity: Severity::Warning,
1510        warn_since: None,
1511        deny_since: None,
1512    },
1513    Lint {
1514        label: "unsupported_calling_conventions",
1515        description: r##"use of unsupported calling convention"##,
1516        default_severity: Severity::Warning,
1517        warn_since: None,
1518        deny_since: None,
1519    },
1520    Lint {
1521        label: "unused_allocation",
1522        description: r##"detects unnecessary allocations that can be eliminated"##,
1523        default_severity: Severity::Warning,
1524        warn_since: None,
1525        deny_since: None,
1526    },
1527    Lint {
1528        label: "unused_assignments",
1529        description: r##"detect assignments that will never be read"##,
1530        default_severity: Severity::Warning,
1531        warn_since: None,
1532        deny_since: None,
1533    },
1534    Lint {
1535        label: "unused_associated_type_bounds",
1536        description: r##"detects unused `Foo = Bar` bounds in `dyn Trait<Foo = Bar>`"##,
1537        default_severity: Severity::Warning,
1538        warn_since: None,
1539        deny_since: None,
1540    },
1541    Lint {
1542        label: "unused_attributes",
1543        description: r##"detects attributes that were not used by the compiler"##,
1544        default_severity: Severity::Warning,
1545        warn_since: None,
1546        deny_since: None,
1547    },
1548    Lint {
1549        label: "unused_braces",
1550        description: r##"unnecessary braces around an expression"##,
1551        default_severity: Severity::Warning,
1552        warn_since: None,
1553        deny_since: None,
1554    },
1555    Lint {
1556        label: "unused_comparisons",
1557        description: r##"comparisons made useless by limits of the types involved"##,
1558        default_severity: Severity::Warning,
1559        warn_since: None,
1560        deny_since: None,
1561    },
1562    Lint {
1563        label: "unused_crate_dependencies",
1564        description: r##"crate dependencies that are never used"##,
1565        default_severity: Severity::Allow,
1566        warn_since: None,
1567        deny_since: None,
1568    },
1569    Lint {
1570        label: "unused_doc_comments",
1571        description: r##"detects doc comments that aren't used by rustdoc"##,
1572        default_severity: Severity::Warning,
1573        warn_since: None,
1574        deny_since: None,
1575    },
1576    Lint {
1577        label: "unused_extern_crates",
1578        description: r##"extern crates that are never used"##,
1579        default_severity: Severity::Allow,
1580        warn_since: None,
1581        deny_since: None,
1582    },
1583    Lint {
1584        label: "unused_features",
1585        description: r##"unused features found in crate-level `#[feature]` directives"##,
1586        default_severity: Severity::Warning,
1587        warn_since: None,
1588        deny_since: None,
1589    },
1590    Lint {
1591        label: "unused_import_braces",
1592        description: r##"unnecessary braces around an imported item"##,
1593        default_severity: Severity::Allow,
1594        warn_since: None,
1595        deny_since: None,
1596    },
1597    Lint {
1598        label: "unused_imports",
1599        description: r##"imports that are never used"##,
1600        default_severity: Severity::Warning,
1601        warn_since: None,
1602        deny_since: None,
1603    },
1604    Lint {
1605        label: "unused_labels",
1606        description: r##"detects labels that are never used"##,
1607        default_severity: Severity::Warning,
1608        warn_since: None,
1609        deny_since: None,
1610    },
1611    Lint {
1612        label: "unused_lifetimes",
1613        description: r##"detects lifetime parameters that are never used"##,
1614        default_severity: Severity::Allow,
1615        warn_since: None,
1616        deny_since: None,
1617    },
1618    Lint {
1619        label: "unused_macro_rules",
1620        description: r##"detects macro rules that were not used"##,
1621        default_severity: Severity::Allow,
1622        warn_since: None,
1623        deny_since: None,
1624    },
1625    Lint {
1626        label: "unused_macros",
1627        description: r##"detects macros that were not used"##,
1628        default_severity: Severity::Warning,
1629        warn_since: None,
1630        deny_since: None,
1631    },
1632    Lint {
1633        label: "unused_must_use",
1634        description: r##"unused result of a type flagged as `#[must_use]`"##,
1635        default_severity: Severity::Warning,
1636        warn_since: None,
1637        deny_since: None,
1638    },
1639    Lint {
1640        label: "unused_mut",
1641        description: r##"detect mut variables which don't need to be mutable"##,
1642        default_severity: Severity::Warning,
1643        warn_since: None,
1644        deny_since: None,
1645    },
1646    Lint {
1647        label: "unused_parens",
1648        description: r##"`if`, `match`, `while` and `return` do not need parentheses"##,
1649        default_severity: Severity::Warning,
1650        warn_since: None,
1651        deny_since: None,
1652    },
1653    Lint {
1654        label: "unused_qualifications",
1655        description: r##"detects unnecessarily qualified names"##,
1656        default_severity: Severity::Allow,
1657        warn_since: None,
1658        deny_since: None,
1659    },
1660    Lint {
1661        label: "unused_results",
1662        description: r##"unused result of an expression in a statement"##,
1663        default_severity: Severity::Allow,
1664        warn_since: None,
1665        deny_since: None,
1666    },
1667    Lint {
1668        label: "unused_unsafe",
1669        description: r##"unnecessary use of an `unsafe` block"##,
1670        default_severity: Severity::Warning,
1671        warn_since: None,
1672        deny_since: None,
1673    },
1674    Lint {
1675        label: "unused_variables",
1676        description: r##"detect variables which are not used in any way"##,
1677        default_severity: Severity::Warning,
1678        warn_since: None,
1679        deny_since: None,
1680    },
1681    Lint {
1682        label: "unused_visibilities",
1683        description: r##"detect visibility qualifiers on `const _` items"##,
1684        default_severity: Severity::Warning,
1685        warn_since: None,
1686        deny_since: None,
1687    },
1688    Lint {
1689        label: "useless_deprecated",
1690        description: r##"detects deprecation attributes with no effect"##,
1691        default_severity: Severity::Error,
1692        warn_since: None,
1693        deny_since: None,
1694    },
1695    Lint {
1696        label: "useless_ptr_null_checks",
1697        description: r##"useless checking of non-null-typed pointer"##,
1698        default_severity: Severity::Warning,
1699        warn_since: None,
1700        deny_since: None,
1701    },
1702    Lint {
1703        label: "uses_power_alignment",
1704        description: r##"Structs do not follow the power alignment rule under repr(C)"##,
1705        default_severity: Severity::Warning,
1706        warn_since: None,
1707        deny_since: None,
1708    },
1709    Lint {
1710        label: "varargs_without_pattern",
1711        description: r##"detects usage of `...` arguments without a pattern in non-foreign items"##,
1712        default_severity: Severity::Error,
1713        warn_since: None,
1714        deny_since: None,
1715    },
1716    Lint {
1717        label: "variant_size_differences",
1718        description: r##"detects enums with widely varying variant sizes"##,
1719        default_severity: Severity::Allow,
1720        warn_since: None,
1721        deny_since: None,
1722    },
1723    Lint {
1724        label: "warnings",
1725        description: r##"mass-change the level for lints which produce warnings"##,
1726        default_severity: Severity::Warning,
1727        warn_since: None,
1728        deny_since: None,
1729    },
1730    Lint {
1731        label: "while_true",
1732        description: r##"suggest using `loop { }` instead of `while true { }`"##,
1733        default_severity: Severity::Warning,
1734        warn_since: None,
1735        deny_since: None,
1736    },
1737    Lint {
1738        label: "deprecated_safe",
1739        description: r##"lint group for: deprecated-safe-2024"##,
1740        default_severity: Severity::Allow,
1741        warn_since: None,
1742        deny_since: None,
1743    },
1744    Lint {
1745        label: "future_incompatible",
1746        description: r##"lint group for: internal-eq-trait-method-impls, aarch64-softfloat-neon, ambiguous-associated-items, ambiguous-derive-helpers, ambiguous-glob-imported-traits, ambiguous-glob-imports, ambiguous-import-visibilities, ambiguous-panic-imports, coherence-leak-check, conflicting-repr-hints, const-evaluatable-unchecked, elided-lifetimes-in-associated-constant, float-literal-f32-fallback, forbidden-lint-groups, ill-formed-attribute-input, invalid-macro-export-arguments, invalid-type-param-default, late-bound-lifetime-arguments, legacy-derive-helpers, macro-expanded-macro-exports-accessed-by-absolute-paths, out-of-scope-macro-calls, patterns-in-fns-without-body, proc-macro-derive-resolution-fallback, pub-use-of-private-extern-crate, repr-c-enums-larger-than-int, repr-transparent-non-zst-fields, self-constructor-from-outer-item, semicolon-in-expressions-from-macros, uncovered-param-in-projection, uninhabited-static, unstable-name-collisions, unstable-syntax-pre-expansion, unsupported-calling-conventions, varargs-without-pattern"##,
1747        default_severity: Severity::Allow,
1748        warn_since: None,
1749        deny_since: None,
1750    },
1751    Lint {
1752        label: "keyword_idents",
1753        description: r##"lint group for: keyword-idents-2018, keyword-idents-2024"##,
1754        default_severity: Severity::Allow,
1755        warn_since: None,
1756        deny_since: None,
1757    },
1758    Lint {
1759        label: "let_underscore",
1760        description: r##"lint group for: let-underscore-drop, let-underscore-lock"##,
1761        default_severity: Severity::Allow,
1762        warn_since: None,
1763        deny_since: None,
1764    },
1765    Lint {
1766        label: "nonstandard_style",
1767        description: r##"lint group for: non-camel-case-types, non-snake-case, non-upper-case-globals"##,
1768        default_severity: Severity::Allow,
1769        warn_since: None,
1770        deny_since: None,
1771    },
1772    Lint {
1773        label: "refining_impl_trait",
1774        description: r##"lint group for: refining-impl-trait-reachable, refining-impl-trait-internal"##,
1775        default_severity: Severity::Allow,
1776        warn_since: None,
1777        deny_since: None,
1778    },
1779    Lint {
1780        label: "rust_2018_compatibility",
1781        description: r##"lint group for: keyword-idents-2018, anonymous-parameters, absolute-paths-not-starting-with-crate, tyvar-behind-raw-pointer"##,
1782        default_severity: Severity::Allow,
1783        warn_since: None,
1784        deny_since: None,
1785    },
1786    Lint {
1787        label: "rust_2018_idioms",
1788        description: r##"lint group for: bare-trait-objects, unused-extern-crates, ellipsis-inclusive-range-patterns, elided-lifetimes-in-paths, explicit-outlives-requirements"##,
1789        default_severity: Severity::Allow,
1790        warn_since: None,
1791        deny_since: None,
1792    },
1793    Lint {
1794        label: "rust_2021_compatibility",
1795        description: r##"lint group for: ellipsis-inclusive-range-patterns, array-into-iter, non-fmt-panics, bare-trait-objects, rust-2021-incompatible-closure-captures, rust-2021-incompatible-or-patterns, rust-2021-prefixes-incompatible-syntax, rust-2021-prelude-collisions"##,
1796        default_severity: Severity::Allow,
1797        warn_since: None,
1798        deny_since: None,
1799    },
1800    Lint {
1801        label: "rust_2024_compatibility",
1802        description: r##"lint group for: keyword-idents-2024, edition-2024-expr-fragment-specifier, boxed-slice-into-iter, impl-trait-overcaptures, if-let-rescope, static-mut-refs, dependency-on-unit-never-type-fallback, deprecated-safe-2024, missing-unsafe-on-extern, never-type-fallback-flowing-into-unsafe, rust-2024-guarded-string-incompatible-syntax, rust-2024-incompatible-pat, rust-2024-prelude-collisions, tail-expr-drop-order, unsafe-attr-outside-unsafe, unsafe-op-in-unsafe-fn"##,
1803        default_severity: Severity::Allow,
1804        warn_since: None,
1805        deny_since: None,
1806    },
1807    Lint {
1808        label: "unknown_or_malformed_diagnostic_attributes",
1809        description: r##"lint group for: malformed-diagnostic-attributes, malformed-diagnostic-format-literals, misplaced-diagnostic-attributes, unknown-diagnostic-attributes"##,
1810        default_severity: Severity::Allow,
1811        warn_since: None,
1812        deny_since: None,
1813    },
1814    Lint {
1815        label: "unused",
1816        description: r##"lint group for: unused-imports, unused-variables, unused-visibilities, unused-assignments, dead-code, unused-mut, unreachable-code, unreachable-patterns, unused-must-use, unused-unsafe, path-statements, unused-attributes, unused-macros, unused-macro-rules, unused-allocation, unused-doc-comments, unused-extern-crates, unused-features, unused-labels, unused-parens, unused-braces, redundant-semicolons, map-unit-fn"##,
1817        default_severity: Severity::Allow,
1818        warn_since: None,
1819        deny_since: None,
1820    },
1821];
1822
1823pub const DEFAULT_LINT_GROUPS: &[LintGroup] = &[
1824    LintGroup {
1825        lint: Lint {
1826            label: "deprecated_safe",
1827            description: r##"lint group for: deprecated-safe-2024"##,
1828            default_severity: Severity::Allow,
1829            warn_since: None,
1830            deny_since: None,
1831        },
1832        children: &["deprecated_safe_2024"],
1833    },
1834    LintGroup {
1835        lint: Lint {
1836            label: "future_incompatible",
1837            description: r##"lint group for: internal-eq-trait-method-impls, aarch64-softfloat-neon, ambiguous-associated-items, ambiguous-derive-helpers, ambiguous-glob-imported-traits, ambiguous-glob-imports, ambiguous-import-visibilities, ambiguous-panic-imports, coherence-leak-check, conflicting-repr-hints, const-evaluatable-unchecked, elided-lifetimes-in-associated-constant, float-literal-f32-fallback, forbidden-lint-groups, ill-formed-attribute-input, invalid-macro-export-arguments, invalid-type-param-default, late-bound-lifetime-arguments, legacy-derive-helpers, macro-expanded-macro-exports-accessed-by-absolute-paths, out-of-scope-macro-calls, patterns-in-fns-without-body, proc-macro-derive-resolution-fallback, pub-use-of-private-extern-crate, repr-c-enums-larger-than-int, repr-transparent-non-zst-fields, self-constructor-from-outer-item, semicolon-in-expressions-from-macros, uncovered-param-in-projection, uninhabited-static, unstable-name-collisions, unstable-syntax-pre-expansion, unsupported-calling-conventions, varargs-without-pattern"##,
1838            default_severity: Severity::Allow,
1839            warn_since: None,
1840            deny_since: None,
1841        },
1842        children: &[
1843            "internal_eq_trait_method_impls",
1844            "aarch64_softfloat_neon",
1845            "ambiguous_associated_items",
1846            "ambiguous_derive_helpers",
1847            "ambiguous_glob_imported_traits",
1848            "ambiguous_glob_imports",
1849            "ambiguous_import_visibilities",
1850            "ambiguous_panic_imports",
1851            "coherence_leak_check",
1852            "conflicting_repr_hints",
1853            "const_evaluatable_unchecked",
1854            "elided_lifetimes_in_associated_constant",
1855            "float_literal_f32_fallback",
1856            "forbidden_lint_groups",
1857            "ill_formed_attribute_input",
1858            "invalid_macro_export_arguments",
1859            "invalid_type_param_default",
1860            "late_bound_lifetime_arguments",
1861            "legacy_derive_helpers",
1862            "macro_expanded_macro_exports_accessed_by_absolute_paths",
1863            "out_of_scope_macro_calls",
1864            "patterns_in_fns_without_body",
1865            "proc_macro_derive_resolution_fallback",
1866            "pub_use_of_private_extern_crate",
1867            "repr_c_enums_larger_than_int",
1868            "repr_transparent_non_zst_fields",
1869            "self_constructor_from_outer_item",
1870            "semicolon_in_expressions_from_macros",
1871            "uncovered_param_in_projection",
1872            "uninhabited_static",
1873            "unstable_name_collisions",
1874            "unstable_syntax_pre_expansion",
1875            "unsupported_calling_conventions",
1876            "varargs_without_pattern",
1877        ],
1878    },
1879    LintGroup {
1880        lint: Lint {
1881            label: "keyword_idents",
1882            description: r##"lint group for: keyword-idents-2018, keyword-idents-2024"##,
1883            default_severity: Severity::Allow,
1884            warn_since: None,
1885            deny_since: None,
1886        },
1887        children: &["keyword_idents_2018", "keyword_idents_2024"],
1888    },
1889    LintGroup {
1890        lint: Lint {
1891            label: "let_underscore",
1892            description: r##"lint group for: let-underscore-drop, let-underscore-lock"##,
1893            default_severity: Severity::Allow,
1894            warn_since: None,
1895            deny_since: None,
1896        },
1897        children: &["let_underscore_drop", "let_underscore_lock"],
1898    },
1899    LintGroup {
1900        lint: Lint {
1901            label: "nonstandard_style",
1902            description: r##"lint group for: non-camel-case-types, non-snake-case, non-upper-case-globals"##,
1903            default_severity: Severity::Allow,
1904            warn_since: None,
1905            deny_since: None,
1906        },
1907        children: &["non_camel_case_types", "non_snake_case", "non_upper_case_globals"],
1908    },
1909    LintGroup {
1910        lint: Lint {
1911            label: "refining_impl_trait",
1912            description: r##"lint group for: refining-impl-trait-reachable, refining-impl-trait-internal"##,
1913            default_severity: Severity::Allow,
1914            warn_since: None,
1915            deny_since: None,
1916        },
1917        children: &["refining_impl_trait_reachable", "refining_impl_trait_internal"],
1918    },
1919    LintGroup {
1920        lint: Lint {
1921            label: "rust_2018_compatibility",
1922            description: r##"lint group for: keyword-idents-2018, anonymous-parameters, absolute-paths-not-starting-with-crate, tyvar-behind-raw-pointer"##,
1923            default_severity: Severity::Allow,
1924            warn_since: None,
1925            deny_since: None,
1926        },
1927        children: &[
1928            "keyword_idents_2018",
1929            "anonymous_parameters",
1930            "absolute_paths_not_starting_with_crate",
1931            "tyvar_behind_raw_pointer",
1932        ],
1933    },
1934    LintGroup {
1935        lint: Lint {
1936            label: "rust_2018_idioms",
1937            description: r##"lint group for: bare-trait-objects, unused-extern-crates, ellipsis-inclusive-range-patterns, elided-lifetimes-in-paths, explicit-outlives-requirements"##,
1938            default_severity: Severity::Allow,
1939            warn_since: None,
1940            deny_since: None,
1941        },
1942        children: &[
1943            "bare_trait_objects",
1944            "unused_extern_crates",
1945            "ellipsis_inclusive_range_patterns",
1946            "elided_lifetimes_in_paths",
1947            "explicit_outlives_requirements",
1948        ],
1949    },
1950    LintGroup {
1951        lint: Lint {
1952            label: "rust_2021_compatibility",
1953            description: r##"lint group for: ellipsis-inclusive-range-patterns, array-into-iter, non-fmt-panics, bare-trait-objects, rust-2021-incompatible-closure-captures, rust-2021-incompatible-or-patterns, rust-2021-prefixes-incompatible-syntax, rust-2021-prelude-collisions"##,
1954            default_severity: Severity::Allow,
1955            warn_since: None,
1956            deny_since: None,
1957        },
1958        children: &[
1959            "ellipsis_inclusive_range_patterns",
1960            "array_into_iter",
1961            "non_fmt_panics",
1962            "bare_trait_objects",
1963            "rust_2021_incompatible_closure_captures",
1964            "rust_2021_incompatible_or_patterns",
1965            "rust_2021_prefixes_incompatible_syntax",
1966            "rust_2021_prelude_collisions",
1967        ],
1968    },
1969    LintGroup {
1970        lint: Lint {
1971            label: "rust_2024_compatibility",
1972            description: r##"lint group for: keyword-idents-2024, edition-2024-expr-fragment-specifier, boxed-slice-into-iter, impl-trait-overcaptures, if-let-rescope, static-mut-refs, dependency-on-unit-never-type-fallback, deprecated-safe-2024, missing-unsafe-on-extern, never-type-fallback-flowing-into-unsafe, rust-2024-guarded-string-incompatible-syntax, rust-2024-incompatible-pat, rust-2024-prelude-collisions, tail-expr-drop-order, unsafe-attr-outside-unsafe, unsafe-op-in-unsafe-fn"##,
1973            default_severity: Severity::Allow,
1974            warn_since: None,
1975            deny_since: None,
1976        },
1977        children: &[
1978            "keyword_idents_2024",
1979            "edition_2024_expr_fragment_specifier",
1980            "boxed_slice_into_iter",
1981            "impl_trait_overcaptures",
1982            "if_let_rescope",
1983            "static_mut_refs",
1984            "dependency_on_unit_never_type_fallback",
1985            "deprecated_safe_2024",
1986            "missing_unsafe_on_extern",
1987            "never_type_fallback_flowing_into_unsafe",
1988            "rust_2024_guarded_string_incompatible_syntax",
1989            "rust_2024_incompatible_pat",
1990            "rust_2024_prelude_collisions",
1991            "tail_expr_drop_order",
1992            "unsafe_attr_outside_unsafe",
1993            "unsafe_op_in_unsafe_fn",
1994        ],
1995    },
1996    LintGroup {
1997        lint: Lint {
1998            label: "unknown_or_malformed_diagnostic_attributes",
1999            description: r##"lint group for: malformed-diagnostic-attributes, malformed-diagnostic-format-literals, misplaced-diagnostic-attributes, unknown-diagnostic-attributes"##,
2000            default_severity: Severity::Allow,
2001            warn_since: None,
2002            deny_since: None,
2003        },
2004        children: &[
2005            "malformed_diagnostic_attributes",
2006            "malformed_diagnostic_format_literals",
2007            "misplaced_diagnostic_attributes",
2008            "unknown_diagnostic_attributes",
2009        ],
2010    },
2011    LintGroup {
2012        lint: Lint {
2013            label: "unused",
2014            description: r##"lint group for: unused-imports, unused-variables, unused-visibilities, unused-assignments, dead-code, unused-mut, unreachable-code, unreachable-patterns, unused-must-use, unused-unsafe, path-statements, unused-attributes, unused-macros, unused-macro-rules, unused-allocation, unused-doc-comments, unused-extern-crates, unused-features, unused-labels, unused-parens, unused-braces, redundant-semicolons, map-unit-fn"##,
2015            default_severity: Severity::Allow,
2016            warn_since: None,
2017            deny_since: None,
2018        },
2019        children: &[
2020            "unused_imports",
2021            "unused_variables",
2022            "unused_visibilities",
2023            "unused_assignments",
2024            "dead_code",
2025            "unused_mut",
2026            "unreachable_code",
2027            "unreachable_patterns",
2028            "unused_must_use",
2029            "unused_unsafe",
2030            "path_statements",
2031            "unused_attributes",
2032            "unused_macros",
2033            "unused_macro_rules",
2034            "unused_allocation",
2035            "unused_doc_comments",
2036            "unused_extern_crates",
2037            "unused_features",
2038            "unused_labels",
2039            "unused_parens",
2040            "unused_braces",
2041            "redundant_semicolons",
2042            "map_unit_fn",
2043        ],
2044    },
2045];
2046
2047pub const RUSTDOC_LINTS: &[Lint] = &[
2048    Lint {
2049        label: "rustdoc::bare_urls",
2050        description: r##"detects URLs that are not hyperlinks"##,
2051        default_severity: Severity::Warning,
2052        warn_since: None,
2053        deny_since: None,
2054    },
2055    Lint {
2056        label: "rustdoc::broken_intra_doc_links",
2057        description: r##"failures in resolving intra-doc link targets"##,
2058        default_severity: Severity::Warning,
2059        warn_since: None,
2060        deny_since: None,
2061    },
2062    Lint {
2063        label: "rustdoc::invalid_codeblock_attributes",
2064        description: r##"codeblock attribute looks a lot like a known one"##,
2065        default_severity: Severity::Warning,
2066        warn_since: None,
2067        deny_since: None,
2068    },
2069    Lint {
2070        label: "rustdoc::invalid_html_tags",
2071        description: r##"detects invalid HTML tags in doc comments"##,
2072        default_severity: Severity::Warning,
2073        warn_since: None,
2074        deny_since: None,
2075    },
2076    Lint {
2077        label: "rustdoc::invalid_rust_codeblocks",
2078        description: r##"codeblock could not be parsed as valid Rust or is empty"##,
2079        default_severity: Severity::Warning,
2080        warn_since: None,
2081        deny_since: None,
2082    },
2083    Lint {
2084        label: "rustdoc::missing_crate_level_docs",
2085        description: r##"detects crates with no crate-level documentation"##,
2086        default_severity: Severity::Allow,
2087        warn_since: None,
2088        deny_since: None,
2089    },
2090    Lint {
2091        label: "rustdoc::missing_doc_code_examples",
2092        description: r##"detects publicly-exported items without code samples in their documentation"##,
2093        default_severity: Severity::Allow,
2094        warn_since: None,
2095        deny_since: None,
2096    },
2097    Lint {
2098        label: "rustdoc::private_doc_tests",
2099        description: r##"detects code samples in docs of private items not documented by rustdoc"##,
2100        default_severity: Severity::Allow,
2101        warn_since: None,
2102        deny_since: None,
2103    },
2104    Lint {
2105        label: "rustdoc::private_intra_doc_links",
2106        description: r##"linking from a public item to a private one"##,
2107        default_severity: Severity::Warning,
2108        warn_since: None,
2109        deny_since: None,
2110    },
2111    Lint {
2112        label: "rustdoc::redundant_explicit_links",
2113        description: r##"detects redundant explicit links in doc comments"##,
2114        default_severity: Severity::Warning,
2115        warn_since: None,
2116        deny_since: None,
2117    },
2118    Lint {
2119        label: "rustdoc::unescaped_backticks",
2120        description: r##"detects unescaped backticks in doc comments"##,
2121        default_severity: Severity::Allow,
2122        warn_since: None,
2123        deny_since: None,
2124    },
2125    Lint {
2126        label: "rustdoc::all",
2127        description: r##"lint group for: rustdoc::broken-intra-doc-links, rustdoc::private-intra-doc-links, rustdoc::private-doc-tests, rustdoc::invalid-codeblock-attributes, rustdoc::invalid-rust-codeblocks, rustdoc::invalid-html-tags, rustdoc::bare-urls, rustdoc::missing-crate-level-docs, rustdoc::unescaped-backticks, rustdoc::redundant-explicit-links"##,
2128        default_severity: Severity::Allow,
2129        warn_since: None,
2130        deny_since: None,
2131    },
2132];
2133
2134pub const RUSTDOC_LINT_GROUPS: &[LintGroup] = &[LintGroup {
2135    lint: Lint {
2136        label: "rustdoc::all",
2137        description: r##"lint group for: rustdoc::broken-intra-doc-links, rustdoc::private-intra-doc-links, rustdoc::private-doc-tests, rustdoc::invalid-codeblock-attributes, rustdoc::invalid-rust-codeblocks, rustdoc::invalid-html-tags, rustdoc::bare-urls, rustdoc::missing-crate-level-docs, rustdoc::unescaped-backticks, rustdoc::redundant-explicit-links"##,
2138        default_severity: Severity::Allow,
2139        warn_since: None,
2140        deny_since: None,
2141    },
2142    children: &[
2143        "rustdoc::broken_intra_doc_links",
2144        "rustdoc::private_intra_doc_links",
2145        "rustdoc::private_doc_tests",
2146        "rustdoc::invalid_codeblock_attributes",
2147        "rustdoc::invalid_rust_codeblocks",
2148        "rustdoc::invalid_html_tags",
2149        "rustdoc::bare_urls",
2150        "rustdoc::missing_crate_level_docs",
2151        "rustdoc::unescaped_backticks",
2152        "rustdoc::redundant_explicit_links",
2153    ],
2154}];
2155
2156pub const FEATURES: &[Lint] = &[
2157    Lint {
2158        label: "aarch64_unstable_target_feature",
2159        description: r##"# `aarch64_unstable_target_feature`
2160
2161The remaining unstable target features on aarch64.
2162
2163The tracking issue for this feature is: [#150244]
2164
2165[#150244]: https://github.com/rust-lang/rust/issues/150244
2166
2167------------------------
2168"##,
2169        default_severity: Severity::Allow,
2170        warn_since: None,
2171        deny_since: None,
2172    },
2173    Lint {
2174        label: "aarch64_ver_target_feature",
2175        description: r##"# `aarch64_ver_target_feature`
2176
2177Instruction set "version" target features on aarch64.
2178
2179The tracking issue for this feature is: [#150245]
2180
2181[#150245]: https://github.com/rust-lang/rust/issues/150245
2182
2183------------------------
2184"##,
2185        default_severity: Severity::Allow,
2186        warn_since: None,
2187        deny_since: None,
2188    },
2189    Lint {
2190        label: "abi_avr_interrupt",
2191        description: r##"# `abi_avr_interrupt`
2192
2193Allows `extern "avr-interrupt" fn()` and `extern "avr-non-blocking-interrupt" fn()`.
2194
2195The tracking issue for this feature is: [#69664]
2196
2197[#69664]: https://github.com/rust-lang/rust/issues/69664
2198
2199------------------------
2200"##,
2201        default_severity: Severity::Allow,
2202        warn_since: None,
2203        deny_since: None,
2204    },
2205    Lint {
2206        label: "abi_cmse_nonsecure_call",
2207        description: r##"# `abi_cmse_nonsecure_call`
2208
2209The tracking issue for this feature is: [#81391]
2210
2211[#81391]: https://github.com/rust-lang/rust/issues/81391
2212
2213------------------------
2214
2215The [TrustZone-M
2216feature](https://developer.arm.com/documentation/100690/latest/) is available
2217for targets with the Armv8-M architecture profile (`thumbv8m` in their target
2218name).
2219LLVM, the Rust compiler and the linker are providing
2220[support](https://developer.arm.com/documentation/ecm0359818/latest/) for the
2221TrustZone-M feature.
2222
2223One of the things provided with this unstable feature is the "cmse-nonsecure-call" function ABI.
2224This ABI is used on function pointers to non-secure code to mark a non-secure function call
2225(see [section 5.5](https://developer.arm.com/documentation/ecm0359818/latest/) for details).
2226
2227With this ABI, the compiler will do the following to perform the call:
2228* save registers needed after the call to Secure memory
2229* clear all registers that might contain confidential information
2230* clear the Least Significant Bit of the function address
2231* branches using the BLXNS instruction
2232
2233To avoid using the non-secure stack, the compiler will constrain the number and
2234type of parameters/return value.
2235
2236<!-- NOTE(ignore) this example is specific to thumbv8m targets -->
2237
2238``` rust,ignore
2239#![no_std]
2240#![feature(abi_cmse_nonsecure_call)]
2241
2242#[no_mangle]
2243pub fn call_nonsecure_function(addr: usize) -> u32 {
2244    let non_secure_function =
2245        unsafe { core::mem::transmute::<usize, extern "cmse-nonsecure-call" fn() -> u32>(addr) };
2246    non_secure_function()
2247}
2248```
2249
2250``` text
2251$ rustc --emit asm --crate-type lib --target thumbv8m.main-none-eabi function.rs
2252
2253call_nonsecure_function:
2254        .fnstart
2255        .save   {r7, lr}
2256        push    {r7, lr}
2257        .setfp  r7, sp
2258        mov     r7, sp
2259        .pad    #16
2260        sub     sp, #16
2261        str     r0, [sp, #12]
2262        ldr     r0, [sp, #12]
2263        str     r0, [sp, #8]
2264        b       .LBB0_1
2265.LBB0_1:
2266        ldr     r0, [sp, #8]
2267        push.w  {r4, r5, r6, r7, r8, r9, r10, r11}
2268        bic     r0, r0, #1
2269        mov     r1, r0
2270        mov     r2, r0
2271        mov     r3, r0
2272        mov     r4, r0
2273        mov     r5, r0
2274        mov     r6, r0
2275        mov     r7, r0
2276        mov     r8, r0
2277        mov     r9, r0
2278        mov     r10, r0
2279        mov     r11, r0
2280        mov     r12, r0
2281        msr     apsr_nzcvq, r0
2282        blxns   r0
2283        pop.w   {r4, r5, r6, r7, r8, r9, r10, r11}
2284        str     r0, [sp, #4]
2285        b       .LBB0_2
2286.LBB0_2:
2287        ldr     r0, [sp, #4]
2288        add     sp, #16
2289        pop     {r7, pc}
2290```
2291"##,
2292        default_severity: Severity::Allow,
2293        warn_since: None,
2294        deny_since: None,
2295    },
2296    Lint {
2297        label: "abi_custom",
2298        description: r##"# `abi_custom`
2299
2300Allows `extern "custom" fn()`.
2301
2302The tracking issue for this feature is: [#140829]
2303
2304[#140829]: https://github.com/rust-lang/rust/issues/140829
2305
2306------------------------
2307"##,
2308        default_severity: Severity::Allow,
2309        warn_since: None,
2310        deny_since: None,
2311    },
2312    Lint {
2313        label: "abi_gpu_kernel",
2314        description: r##"# `abi_gpu_kernel`
2315
2316Allows `extern "gpu-kernel" fn()`.
2317
2318The tracking issue for this feature is: [#135467]
2319
2320[#135467]: https://github.com/rust-lang/rust/issues/135467
2321
2322------------------------
2323"##,
2324        default_severity: Severity::Allow,
2325        warn_since: None,
2326        deny_since: None,
2327    },
2328    Lint {
2329        label: "abi_msp430_interrupt",
2330        description: r##"# `abi_msp430_interrupt`
2331
2332The tracking issue for this feature is: [#38487]
2333
2334[#38487]: https://github.com/rust-lang/rust/issues/38487
2335
2336------------------------
2337
2338In the MSP430 architecture, interrupt handlers have a special calling
2339convention. You can use the `"msp430-interrupt"` ABI to make the compiler apply
2340the right calling convention to the interrupt handlers you define.
2341
2342<!-- NOTE(ignore) this example is specific to the msp430 target -->
2343
2344``` rust,ignore
2345#![feature(abi_msp430_interrupt)]
2346#![no_std]
2347
2348// Place the interrupt handler at the appropriate memory address
2349// (Alternatively, you can use `#[used]` and remove `pub` and `#[no_mangle]`)
2350#[link_section = "__interrupt_vector_10"]
2351#[no_mangle]
2352pub static TIM0_VECTOR: extern "msp430-interrupt" fn() = tim0;
2353
2354// The interrupt handler
2355extern "msp430-interrupt" fn tim0() {
2356    // ..
2357}
2358```
2359
2360``` text
2361$ msp430-elf-objdump -CD ./target/msp430/release/app
2362Disassembly of section __interrupt_vector_10:
2363
23640000fff2 <TIM0_VECTOR>:
2365    fff2:       00 c0           interrupt service routine at 0xc000
2366
2367Disassembly of section .text:
2368
23690000c000 <int::tim0>:
2370    c000:       00 13           reti
2371```
2372"##,
2373        default_severity: Severity::Allow,
2374        warn_since: None,
2375        deny_since: None,
2376    },
2377    Lint {
2378        label: "abi_ptx",
2379        description: r##"# `abi_ptx`
2380
2381The tracking issue for this feature is: [#38788]
2382
2383[#38788]: https://github.com/rust-lang/rust/issues/38788
2384
2385------------------------
2386
2387When emitting PTX code, all vanilla Rust functions (`fn`) get translated to
2388"device" functions. These functions are *not* callable from the host via the
2389CUDA API so a crate with only device functions is not too useful!
2390
2391OTOH, "global" functions *can* be called by the host; you can think of them
2392as the real public API of your crate. To produce a global function use the
2393`"ptx-kernel"` ABI.
2394
2395<!-- NOTE(ignore) this example is specific to the nvptx targets -->
2396
2397``` rust,ignore
2398#![feature(abi_ptx)]
2399#![no_std]
2400
2401pub unsafe extern "ptx-kernel" fn global_function() {
2402    device_function();
2403}
2404
2405pub fn device_function() {
2406    // ..
2407}
2408```
2409
2410``` text
2411$ xargo rustc --target nvptx64-nvidia-cuda --release -- --emit=asm
2412
2413$ cat $(find -name '*.s')
2414//
2415// Generated by LLVM NVPTX Back-End
2416//
2417
2418.version 3.2
2419.target sm_20
2420.address_size 64
2421
2422        // .globl       _ZN6kernel15global_function17h46111ebe6516b382E
2423
2424.visible .entry _ZN6kernel15global_function17h46111ebe6516b382E()
2425{
2426
2427
2428        ret;
2429}
2430
2431        // .globl       _ZN6kernel15device_function17hd6a0e4993bbf3f78E
2432.visible .func _ZN6kernel15device_function17hd6a0e4993bbf3f78E()
2433{
2434
2435
2436        ret;
2437}
2438```
2439"##,
2440        default_severity: Severity::Allow,
2441        warn_since: None,
2442        deny_since: None,
2443    },
2444    Lint {
2445        label: "abi_riscv_interrupt",
2446        description: r##"# `abi_riscv_interrupt`
2447
2448Allows `extern "riscv-interrupt-m" fn()` and `extern "riscv-interrupt-s" fn()`.
2449
2450The tracking issue for this feature is: [#111889]
2451
2452[#111889]: https://github.com/rust-lang/rust/issues/111889
2453
2454------------------------
2455"##,
2456        default_severity: Severity::Allow,
2457        warn_since: None,
2458        deny_since: None,
2459    },
2460    Lint {
2461        label: "abi_swift",
2462        description: r##"# `abi_swift`
2463
2464Allows `extern "Swift" fn()`.
2465
2466The tracking issue for this feature is: [#156481]
2467
2468[#156481]: https://github.com/rust-lang/rust/issues/156481
2469
2470------------------------
2471"##,
2472        default_severity: Severity::Allow,
2473        warn_since: None,
2474        deny_since: None,
2475    },
2476    Lint {
2477        label: "abi_unadjusted",
2478        description: r##"# `abi_unadjusted`
2479
2480Allows using the `unadjusted` ABI; perma-unstable.
2481
2482This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
2483
2484------------------------
2485"##,
2486        default_severity: Severity::Allow,
2487        warn_since: None,
2488        deny_since: None,
2489    },
2490    Lint {
2491        label: "abi_vectorcall",
2492        description: r##"# `abi_vectorcall`
2493
2494The tracking issue for this feature is: [#124485]
2495
2496[#124485]: https://github.com/rust-lang/rust/issues/124485
2497
2498------------------------
2499
2500Adds support for the Windows `"vectorcall"` ABI, the equivalent of `__vectorcall` in MSVC.
2501
2502```rust,ignore (only-windows-or-x86-or-x86-64)
2503extern "vectorcall" {
2504    fn add_f64s(x: f64, y: f64) -> f64;
2505}
2506
2507fn main() {
2508    println!("{}", add_f64s(2.0, 4.0));
2509}
2510```
2511"##,
2512        default_severity: Severity::Allow,
2513        warn_since: None,
2514        deny_since: None,
2515    },
2516    Lint {
2517        label: "abi_x86_interrupt",
2518        description: r##"# `abi_x86_interrupt`
2519
2520Allows `extern "x86-interrupt" fn()`.
2521
2522The tracking issue for this feature is: [#40180]
2523
2524[#40180]: https://github.com/rust-lang/rust/issues/40180
2525
2526------------------------
2527"##,
2528        default_severity: Severity::Allow,
2529        warn_since: None,
2530        deny_since: None,
2531    },
2532    Lint {
2533        label: "abort_immediate",
2534        description: r##"# `abort_immediate`
2535
2536
2537
2538The tracking issue for this feature is: [#154601]
2539
2540[#154601]: https://github.com/rust-lang/rust/issues/154601
2541
2542------------------------
2543"##,
2544        default_severity: Severity::Allow,
2545        warn_since: None,
2546        deny_since: None,
2547    },
2548    Lint {
2549        label: "abort_unwind",
2550        description: r##"# `abort_unwind`
2551
2552
2553
2554The tracking issue for this feature is: [#130338]
2555
2556[#130338]: https://github.com/rust-lang/rust/issues/130338
2557
2558------------------------
2559"##,
2560        default_severity: Severity::Allow,
2561        warn_since: None,
2562        deny_since: None,
2563    },
2564    Lint {
2565        label: "acceptfilter",
2566        description: r##"# `acceptfilter`
2567
2568
2569
2570The tracking issue for this feature is: [#121891]
2571
2572[#121891]: https://github.com/rust-lang/rust/issues/121891
2573
2574------------------------
2575"##,
2576        default_severity: Severity::Allow,
2577        warn_since: None,
2578        deny_since: None,
2579    },
2580    Lint {
2581        label: "addr_parse_ascii",
2582        description: r##"# `addr_parse_ascii`
2583
2584
2585
2586The tracking issue for this feature is: [#101035]
2587
2588[#101035]: https://github.com/rust-lang/rust/issues/101035
2589
2590------------------------
2591"##,
2592        default_severity: Severity::Allow,
2593        warn_since: None,
2594        deny_since: None,
2595    },
2596    Lint {
2597        label: "adt_const_params",
2598        description: r##"# `adt_const_params`
2599
2600The tracking issue for this feature is: [#95174]
2601
2602[#95174]: https://github.com/rust-lang/rust/issues/95174
2603
2604------------------------
2605
2606Allows for using more complex types for const parameters, such as structs or enums.
2607
2608```rust
2609#![feature(adt_const_params)]
2610#![allow(incomplete_features)]
2611
2612use std::marker::ConstParamTy;
2613
2614#[derive(ConstParamTy, PartialEq, Eq)]
2615enum Foo {
2616    A,
2617    B,
2618    C,
2619}
2620
2621#[derive(ConstParamTy, PartialEq, Eq)]
2622struct Bar {
2623    flag: bool,
2624}
2625
2626fn is_foo_a_and_bar_true<const F: Foo, const B: Bar>() -> bool {
2627    match (F, B.flag) {
2628        (Foo::A, true) => true,
2629        _ => false,
2630    }
2631}
2632```
2633"##,
2634        default_severity: Severity::Allow,
2635        warn_since: None,
2636        deny_since: None,
2637    },
2638    Lint {
2639        label: "align_to_uninit_mut",
2640        description: r##"# `align_to_uninit_mut`
2641
2642
2643
2644The tracking issue for this feature is: [#139062]
2645
2646[#139062]: https://github.com/rust-lang/rust/issues/139062
2647
2648------------------------
2649"##,
2650        default_severity: Severity::Allow,
2651        warn_since: None,
2652        deny_since: None,
2653    },
2654    Lint {
2655        label: "alloc_error_handler",
2656        description: r##"# `alloc_error_handler`
2657
2658Allows defining an `#[alloc_error_handler]`.
2659
2660The tracking issue for this feature is: [#51540]
2661
2662[#51540]: https://github.com/rust-lang/rust/issues/51540
2663
2664------------------------
2665"##,
2666        default_severity: Severity::Allow,
2667        warn_since: None,
2668        deny_since: None,
2669    },
2670    Lint {
2671        label: "alloc_error_hook",
2672        description: r##"# `alloc_error_hook`
2673
2674
2675
2676The tracking issue for this feature is: [#51245]
2677
2678[#51245]: https://github.com/rust-lang/rust/issues/51245
2679
2680------------------------
2681"##,
2682        default_severity: Severity::Allow,
2683        warn_since: None,
2684        deny_since: None,
2685    },
2686    Lint {
2687        label: "alloc_internals",
2688        description: r##"# `alloc_internals`
2689
2690
2691
2692This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
2693
2694------------------------
2695"##,
2696        default_severity: Severity::Allow,
2697        warn_since: None,
2698        deny_since: None,
2699    },
2700    Lint {
2701        label: "alloc_slice_into_array",
2702        description: r##"# `alloc_slice_into_array`
2703
2704
2705
2706The tracking issue for this feature is: [#148082]
2707
2708[#148082]: https://github.com/rust-lang/rust/issues/148082
2709
2710------------------------
2711"##,
2712        default_severity: Severity::Allow,
2713        warn_since: None,
2714        deny_since: None,
2715    },
2716    Lint {
2717        label: "allocator_api",
2718        description: r##"# `allocator_api`
2719
2720The tracking issue for this feature is [#32838]
2721
2722[#32838]: https://github.com/rust-lang/rust/issues/32838
2723
2724------------------------
2725
2726Sometimes you want the memory for one collection to use a different
2727allocator than the memory for another collection. In this case,
2728replacing the global allocator is not a workable option. Instead,
2729you need to pass in an instance of an `AllocRef` to each collection
2730for which you want a custom allocator.
2731
2732TBD
2733"##,
2734        default_severity: Severity::Allow,
2735        warn_since: None,
2736        deny_since: None,
2737    },
2738    Lint {
2739        label: "allocator_internals",
2740        description: r##"# `allocator_internals`
2741
2742This feature does not have a tracking issue, it is an unstable implementation
2743detail of the `global_allocator` feature not intended for use outside the
2744compiler.
2745
2746------------------------
2747"##,
2748        default_severity: Severity::Allow,
2749        warn_since: None,
2750        deny_since: None,
2751    },
2752    Lint {
2753        label: "alloctests",
2754        description: r##"# `alloctests`
2755
2756
2757
2758This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
2759
2760------------------------
2761"##,
2762        default_severity: Severity::Allow,
2763        warn_since: None,
2764        deny_since: None,
2765    },
2766    Lint {
2767        label: "allow_internal_unsafe",
2768        description: r##"# `allow_internal_unsafe`
2769
2770Allows using `#[allow_internal_unsafe]`. This is an attribute on `macro_rules!` and can't use the attribute handling below (it has to be checked before expansion possibly makes macros disappear).
2771
2772This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
2773
2774------------------------
2775"##,
2776        default_severity: Severity::Allow,
2777        warn_since: None,
2778        deny_since: None,
2779    },
2780    Lint {
2781        label: "allow_internal_unstable",
2782        description: r##"# `allow_internal_unstable`
2783
2784Allows using `#[allow_internal_unstable]`. This is an attribute on `macro_rules!` and can't use the attribute handling below (it has to be checked before expansion possibly makes macros disappear).
2785
2786This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
2787
2788------------------------
2789"##,
2790        default_severity: Severity::Allow,
2791        warn_since: None,
2792        deny_since: None,
2793    },
2794    Lint {
2795        label: "anonymous_lifetime_in_impl_trait",
2796        description: r##"# `anonymous_lifetime_in_impl_trait`
2797
2798Allows using anonymous lifetimes in argument-position impl-trait.
2799
2800This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
2801
2802------------------------
2803"##,
2804        default_severity: Severity::Allow,
2805        warn_since: None,
2806        deny_since: None,
2807    },
2808    Lint {
2809        label: "apx_target_feature",
2810        description: r##"# `apx_target_feature`
2811
2812The `apxf` target feature on x86
2813
2814The tracking issue for this feature is: [#139284]
2815
2816[#139284]: https://github.com/rust-lang/rust/issues/139284
2817
2818------------------------
2819"##,
2820        default_severity: Severity::Allow,
2821        warn_since: None,
2822        deny_since: None,
2823    },
2824    Lint {
2825        label: "arbitrary_self_types",
2826        description: r##"# `arbitrary_self_types`
2827
2828The tracking issue for this feature is: [#44874]
2829
2830[#44874]: https://github.com/rust-lang/rust/issues/44874
2831
2832------------------------
2833
2834Allows any type implementing `core::ops::Receiver<Target=T>` to be used as the type
2835of `self` in a method belonging to `T`.
2836
2837For example,
2838
2839```rust
2840#![feature(arbitrary_self_types)]
2841
2842struct A;
2843
2844impl A {
2845    fn f(self: SmartPtr<Self>) -> i32 { 1 }  // note self type
2846}
2847
2848struct SmartPtr<T>(T);
2849
2850impl<T> core::ops::Receiver for SmartPtr<T> {
2851    type Target = T;
2852}
2853
2854fn main() {
2855    let smart_ptr = SmartPtr(A);
2856    assert_eq!(smart_ptr.f(), 1);
2857}
2858```
2859
2860The `Receiver` trait has a blanket implementation for all `T: Deref`, so in fact
2861things like this work too:
2862
2863```rust
2864#![feature(arbitrary_self_types)]
2865
2866use std::rc::Rc;
2867
2868struct A;
2869
2870impl A {
2871    fn f(self: Rc<Self>) -> i32 { 1 } // Rc implements Deref
2872}
2873
2874fn main() {
2875    let smart_ptr = Rc::new(A);
2876    assert_eq!(smart_ptr.f(), 1);
2877}
2878```
2879
2880Interestingly, that works even without the `arbitrary_self_types` feature
2881- but that's because certain types are _effectively_ hard coded, including
2882`Rc`. ("Hard coding" isn't quite true; they use a lang-item called
2883`LegacyReceiver` to denote their special-ness in this way). With the
2884`arbitrary_self_types` feature, their special-ness goes away, and custom
2885smart pointers can achieve the same.
2886
2887## Changes to method lookup
2888
2889Method lookup previously used to work by stepping through the `Deref`
2890chain then using the resulting list of steps in two different ways:
2891
2892* To identify types that might contribute methods via their `impl`
2893  blocks (inherent methods) or via traits
2894* To identify the types that the method receiver (`a` in the above
2895  examples) can be converted to.
2896
2897With this feature, these lists are created by instead stepping through
2898the `Receiver` chain. However, a note is kept about whether the type
2899can be reached also via the `Deref` chain.
2900
2901The full chain (via `Receiver` hops) is used for the first purpose
2902(identifying relevant `impl` blocks and traits); whereas the shorter
2903list (reachable via `Deref`) is used for the second purpose. That's
2904because, to convert the method target (`a` in `a.b()`) to the self
2905type, Rust may need to be able to use `Deref::deref`. Type conversions,
2906then, can only proceed as far as the end of the `Deref` chain whereas
2907the longer `Receiver` chain can be used to explore more places where
2908useful methods might reside.
2909
2910## Types suitable for use as smart pointers
2911
2912This feature allows the creation of customised smart pointers - for example
2913your own equivalent to `Rc` or `Box` with whatever capabilities you like.
2914Those smart pointers can either implement `Deref` (if it's safe to
2915create a reference to the referent) or `Receiver` (if it isn't).
2916
2917Either way, smart pointer types should mostly _avoid having methods_.
2918Calling methods on a smart pointer leads to ambiguity about whether you're
2919aiming for a method on the pointer, or on the referent.
2920
2921Best practice is therefore to put smart pointer functionality into
2922associated functions instead - that's what's done in all the smart pointer
2923types within Rust's standard library which implement `Receiver`.
2924
2925If you choose to add any methods to your smart pointer type, your users
2926may run into errors from deshadowing, as described in the next section.
2927
2928## Avoiding shadowing
2929
2930With or without this feature, Rust emits an error if it finds two method
2931candidates, like this:
2932
2933```rust,compile_fail
2934use std::pin::Pin;
2935use std::pin::pin;
2936
2937struct A;
2938
2939impl A {
2940    fn get_ref(self: Pin<&A>) {}
2941}
2942
2943fn main() {
2944    let pinned_a: Pin<&A> = pin!(A).as_ref();
2945    let pinned_a: Pin<&A> = pinned_a.as_ref();
2946    pinned_a.get_ref(); // error[E0034]: multiple applicable items in scope
2947}
2948```
2949
2950(this is why Rust's smart pointers are mostly carefully designed to avoid
2951having methods at all, and shouldn't add new methods in future.)
2952
2953With `arbitrary_self_types`, we take care to spot some other kinds of
2954conflict:
2955
2956```rust,compile_fail
2957#![feature(arbitrary_self_types)]
2958
2959use std::pin::Pin;
2960use std::pin::pin;
2961
2962struct A;
2963
2964impl A {
2965    fn get_ref(self: &Pin<&A>) {}  // note &Pin
2966}
2967
2968fn main() {
2969    let pinned_a: Pin<&mut A> = pin!(A);
2970    let pinned_a: Pin<&A> = pinned_a.as_ref();
2971    pinned_a.get_ref();
2972}
2973```
2974
2975This is to guard against the case where an inner (referent) type has a
2976method of a given name, taking the smart pointer by reference, and then
2977the smart pointer implementer adds a similar method taking self by value.
2978As noted in the previous section, the safe option is simply
2979not to add methods to smart pointers, and then these errors can't occur.
2980"##,
2981        default_severity: Severity::Allow,
2982        warn_since: None,
2983        deny_since: None,
2984    },
2985    Lint {
2986        label: "arbitrary_self_types_pointers",
2987        description: r##"# `arbitrary_self_types_pointers`
2988
2989The tracking issue for this feature is: [#44874]
2990
2991[#38788]: https://github.com/rust-lang/rust/issues/44874
2992
2993------------------------
2994
2995This extends the [arbitrary self types] feature to allow methods to
2996receive `self` by pointer. For example:
2997
2998```rust
2999#![feature(arbitrary_self_types_pointers)]
3000
3001struct A;
3002
3003impl A {
3004    fn m(self: *const Self) {}
3005}
3006
3007fn main() {
3008    let a = A;
3009    let a_ptr: *const A = &a as *const A;
3010    a_ptr.m();
3011}
3012```
3013
3014In general this is not advised: it's thought to be better practice to wrap
3015raw pointers in a newtype wrapper which implements the `core::ops::Receiver`
3016trait, then you need "only" the `arbitrary_self_types` feature. For example:
3017
3018```rust
3019#![feature(arbitrary_self_types)]
3020#![allow(dead_code)]
3021
3022struct A;
3023
3024impl A {
3025    fn m(self: Wrapper<Self>) {} // can extract the pointer and do
3026        // what it needs
3027}
3028
3029struct Wrapper<T>(*const T);
3030
3031impl<T> core::ops::Receiver for Wrapper<T> {
3032    type Target = T;
3033}
3034
3035fn main() {
3036    let a = A;
3037    let a_ptr: *const A = &a as *const A;
3038    let a_wrapper = Wrapper(a_ptr);
3039    a_wrapper.m();
3040}
3041```
3042
3043[arbitrary self types]: arbitrary-self-types.md
3044"##,
3045        default_severity: Severity::Allow,
3046        warn_since: None,
3047        deny_since: None,
3048    },
3049    Lint {
3050        label: "arc_is_unique",
3051        description: r##"# `arc_is_unique`
3052
3053
3054
3055The tracking issue for this feature is: [#138938]
3056
3057[#138938]: https://github.com/rust-lang/rust/issues/138938
3058
3059------------------------
3060"##,
3061        default_severity: Severity::Allow,
3062        warn_since: None,
3063        deny_since: None,
3064    },
3065    Lint {
3066        label: "arm_target_feature",
3067        description: r##"# `arm_target_feature`
3068
3069Target features on arm.
3070
3071The tracking issue for this feature is: [#150246]
3072
3073[#150246]: https://github.com/rust-lang/rust/issues/150246
3074
3075------------------------
3076"##,
3077        default_severity: Severity::Allow,
3078        warn_since: None,
3079        deny_since: None,
3080    },
3081    Lint {
3082        label: "array_into_iter_constructors",
3083        description: r##"# `array_into_iter_constructors`
3084
3085
3086
3087The tracking issue for this feature is: [#91583]
3088
3089[#91583]: https://github.com/rust-lang/rust/issues/91583
3090
3091------------------------
3092"##,
3093        default_severity: Severity::Allow,
3094        warn_since: None,
3095        deny_since: None,
3096    },
3097    Lint {
3098        label: "array_ptr_get",
3099        description: r##"# `array_ptr_get`
3100
3101
3102
3103The tracking issue for this feature is: [#119834]
3104
3105[#119834]: https://github.com/rust-lang/rust/issues/119834
3106
3107------------------------
3108"##,
3109        default_severity: Severity::Allow,
3110        warn_since: None,
3111        deny_since: None,
3112    },
3113    Lint {
3114        label: "array_try_from_fn",
3115        description: r##"# `array_try_from_fn`
3116
3117
3118
3119The tracking issue for this feature is: [#89379]
3120
3121[#89379]: https://github.com/rust-lang/rust/issues/89379
3122
3123------------------------
3124"##,
3125        default_severity: Severity::Allow,
3126        warn_since: None,
3127        deny_since: None,
3128    },
3129    Lint {
3130        label: "array_try_map",
3131        description: r##"# `array_try_map`
3132
3133
3134
3135The tracking issue for this feature is: [#79711]
3136
3137[#79711]: https://github.com/rust-lang/rust/issues/79711
3138
3139------------------------
3140"##,
3141        default_severity: Severity::Allow,
3142        warn_since: None,
3143        deny_since: None,
3144    },
3145    Lint {
3146        label: "ascii_char",
3147        description: r##"# `ascii_char`
3148
3149
3150
3151The tracking issue for this feature is: [#110998]
3152
3153[#110998]: https://github.com/rust-lang/rust/issues/110998
3154
3155------------------------
3156"##,
3157        default_severity: Severity::Allow,
3158        warn_since: None,
3159        deny_since: None,
3160    },
3161    Lint {
3162        label: "ascii_char_variants",
3163        description: r##"# `ascii_char_variants`
3164
3165
3166
3167The tracking issue for this feature is: [#110998]
3168
3169[#110998]: https://github.com/rust-lang/rust/issues/110998
3170
3171------------------------
3172"##,
3173        default_severity: Severity::Allow,
3174        warn_since: None,
3175        deny_since: None,
3176    },
3177    Lint {
3178        label: "asm_experimental_arch",
3179        description: r##"# `asm_experimental_arch`
3180
3181The tracking issue for this feature is: [#93335]
3182
3183[#93335]: https://github.com/rust-lang/rust/issues/93335
3184
3185------------------------
3186
3187This feature tracks `asm!` and `global_asm!` support for the following architectures:
3188- NVPTX
3189- Hexagon
3190- MIPS32r2 and MIPS64r2
3191- wasm32
3192- BPF
3193- SPIR-V
3194- AVR
3195- MSP430
3196- M68k
3197- CSKY
3198- SPARC
3199
3200## Register classes
3201
3202| Architecture | Register class | Registers                          | LLVM constraint code |
3203| ------------ | -------------- | ---------------------------------- | -------------------- |
3204| MIPS         | `reg`          | `$[2-25]`                          | `r`                  |
3205| MIPS         | `freg`         | `$f[0-31]`                         | `f`                  |
3206| NVPTX        | `reg16`        | None\*                             | `h`                  |
3207| NVPTX        | `reg32`        | None\*                             | `r`                  |
3208| NVPTX        | `reg64`        | None\*                             | `l`                  |
3209| Hexagon      | `reg`          | `r[0-28]`                          | `r`                  |
3210| Hexagon      | `preg`         | `p[0-3]`                           | Only clobbers        |
3211| wasm32       | `local`        | None\*                             | `r`                  |
3212| BPF          | `reg`          | `r[0-10]`                          | `r`                  |
3213| BPF          | `wreg`         | `w[0-10]`                          | `w`                  |
3214| AVR          | `reg`          | `r[2-25]`, `XH`, `XL`, `ZH`, `ZL`  | `r`                  |
3215| AVR          | `reg_upper`    | `r[16-25]`, `XH`, `XL`, `ZH`, `ZL` | `d`                  |
3216| AVR          | `reg_pair`     | `r3r2` .. `r25r24`, `X`, `Z`       | `r`                  |
3217| AVR          | `reg_iw`       | `r25r24`, `X`, `Z`                 | `w`                  |
3218| AVR          | `reg_ptr`      | `X`, `Z`                           | `e`                  |
3219| MSP430       | `reg`          | `r[0-15]`                          | `r`                  |
3220| M68k         | `reg`          | `d[0-7]`, `a[0-7]`                 | `r`                  |
3221| M68k         | `reg_data`     | `d[0-7]`                           | `d`                  |
3222| M68k         | `reg_addr`     | `a[0-3]`                           | `a`                  |
3223| CSKY         | `reg`          | `r[0-31]`                          | `r`                  |
3224| CSKY         | `freg`         | `f[0-31]`                          | `f`                  |
3225| SPARC        | `reg`          | `r[2-29]`                          | `r`                  |
3226| SPARC        | `yreg`         | `y`                                | Only clobbers        |
3227
3228> **Notes**:
3229> - NVPTX doesn't have a fixed register set, so named registers are not supported.
3230>
3231> - WebAssembly doesn't have registers, so named registers are not supported.
3232
3233# Register class supported types
3234
3235| Architecture | Register class                  | Target feature | Allowed types                           |
3236| ------------ | ------------------------------- | -------------- | --------------------------------------- |
3237| MIPS32       | `reg`                           | None           | `i8`, `i16`, `i32`, `f32`               |
3238| MIPS32       | `freg`                          | None           | `f32`, `f64`                            |
3239| MIPS64       | `reg`                           | None           | `i8`, `i16`, `i32`, `i64`, `f32`, `f64` |
3240| MIPS64       | `freg`                          | None           | `f32`, `f64`                            |
3241| NVPTX        | `reg16`                         | None           | `i8`, `i16`                             |
3242| NVPTX        | `reg32`                         | None           | `i8`, `i16`, `i32`, `f32`               |
3243| NVPTX        | `reg64`                         | None           | `i8`, `i16`, `i32`, `f32`, `i64`, `f64` |
3244| Hexagon      | `reg`                           | None           | `i8`, `i16`, `i32`, `f32`               |
3245| Hexagon      | `preg`                          | N/A            | Only clobbers                           |
3246| wasm32       | `local`                         | None           | `i8` `i16` `i32` `i64` `f32` `f64`      |
3247| BPF          | `reg`                           | None           | `i8` `i16` `i32` `i64`                  |
3248| BPF          | `wreg`                          | `alu32`        | `i8` `i16` `i32`                        |
3249| AVR          | `reg`, `reg_upper`              | None           | `i8`                                    |
3250| AVR          | `reg_pair`, `reg_iw`, `reg_ptr` | None           | `i16`                                   |
3251| MSP430       | `reg`                           | None           | `i8`, `i16`                             |
3252| M68k         | `reg`, `reg_addr`               | None           | `i16`, `i32`                            |
3253| M68k         | `reg_data`                      | None           | `i8`, `i16`, `i32`                      |
3254| CSKY         | `reg`                           | None           | `i8`, `i16`, `i32`                      |
3255| CSKY         | `freg`                          | None           | `f32`,                                  |
3256| SPARC        | `reg`                           | None           | `i8`, `i16`, `i32`, `i64` (SPARC64 only) |
3257| SPARC        | `yreg`                          | N/A            | Only clobbers                           |
3258
3259## Register aliases
3260
3261| Architecture | Base register | Aliases   |
3262| ------------ | ------------- | --------- |
3263| Hexagon      | `r29`         | `sp`      |
3264| Hexagon      | `r30`         | `fr`      |
3265| Hexagon      | `r31`         | `lr`      |
3266| BPF          | `r[0-10]`     | `w[0-10]` |
3267| AVR          | `XH`          | `r27`     |
3268| AVR          | `XL`          | `r26`     |
3269| AVR          | `ZH`          | `r31`     |
3270| AVR          | `ZL`          | `r30`     |
3271| MSP430       | `r0`          | `pc`      |
3272| MSP430       | `r1`          | `sp`      |
3273| MSP430       | `r2`          | `sr`      |
3274| MSP430       | `r3`          | `cg`      |
3275| MSP430       | `r4`          | `fp`      |
3276| M68k         | `a5`          | `bp`      |
3277| M68k         | `a6`          | `fp`      |
3278| M68k         | `a7`          | `sp`, `usp`, `ssp`, `isp` |
3279| CSKY         | `r[0-3]`      | `a[0-3]`  |
3280| CSKY         | `r[4-11]`     | `l[0-7]`  |
3281| CSKY         | `r[12-13]`    | `t[0-1]`  |
3282| CSKY         | `r14`         | `sp`      |
3283| CSKY         | `r15`         | `lr`      |
3284| CSKY         | `r[16-17]`    | `l[8-9]`  |
3285| CSKY         | `r[18-25]`    | `t[2-9]`  |
3286| CSKY         | `r28`         | `rgb`     |
3287| CSKY         | `r29`         | `rtb`     |
3288| CSKY         | `r30`         | `svbr`    |
3289| CSKY         | `r31`         | `tls`     |
3290| SPARC        | `r[0-7]`      | `g[0-7]`  |
3291| SPARC        | `r[8-15]`     | `o[0-7]`  |
3292| SPARC        | `r[16-23]`    | `l[0-7]`  |
3293| SPARC        | `r[24-31]`    | `i[0-7]`  |
3294
3295> **Notes**:
3296> - TI does not mandate a frame pointer for MSP430, but toolchains are allowed
3297    to use one; LLVM uses `r4`.
3298
3299## Unsupported registers
3300
3301| Architecture | Unsupported register                    | Reason                                                                                                                                                                              |
3302| ------------ | --------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
3303| All          | `sp`, `r14`/`o6` (SPARC)                | The stack pointer must be restored to its original value at the end of an asm code block.                                                                                           |
3304| All          | `fr` (Hexagon) `$fp` (MIPS), `Y` (AVR), `r4` (MSP430), `a6` (M68k), `r30`/`i6` (SPARC) | The frame pointer cannot be used as an input or output.                                                             |
3305| All          | `r19` (Hexagon) | These are used internally by LLVM as "base pointer" for functions with complex stack frames.                                                                              |
3306| MIPS         | `$0` or `$zero`                         | This is a constant zero register which can't be modified.                                                                                                                           |
3307| MIPS         | `$1` or `$at`                           | Reserved for assembler.                                                                                                                                                             |
3308| MIPS         | `$26`/`$k0`, `$27`/`$k1`                | OS-reserved registers.                                                                                                                                                              |
3309| MIPS         | `$28`/`$gp`                             | Global pointer cannot be used as inputs or outputs.                                                                                                                                 |
3310| MIPS         | `$ra`                                   | Return address cannot be used as inputs or outputs.                                                                                                                                 |
3311| Hexagon      | `lr`                                    | This is the link register which cannot be used as an input or output.                                                                                                               |
3312| AVR          | `r0`, `r1`, `r1r0`                      | Due to an issue in LLVM, the `r0` and `r1` registers cannot be used as inputs or outputs.  If modified, they must be restored to their original values before the end of the block. |
3313|MSP430        | `r0`, `r2`, `r3`                        | These are the program counter, status register, and constant generator respectively. Neither the status register nor constant generator can be written to.                          |
3314| M68k         | `a4`, `a5`                              | Used internally by LLVM for the base pointer and global base pointer. |
3315| CSKY         | `r7`, `r28`                             | Used internally by LLVM for the base pointer and global base pointer. |
3316| CSKY         | `r8`                                    | Used internally by LLVM for the frame pointer. |
3317| CSKY         | `r14`                                   | Used internally by LLVM for the stack pointer. |
3318| CSKY         | `r15`                                   | This is the link register. |
3319| CSKY         | `r[26-30]`                              | Reserved by its ABI.       |
3320| CSKY         | `r31`                                   | This is the TLS register.  |
3321| SPARC        | `r0`/`g0`                               | This is always zero and cannot be used as inputs or outputs. |
3322| SPARC        | `r1`/`g1`                               | Used internally by LLVM. |
3323| SPARC        | `r5`/`g5`                               | Reserved for system. (SPARC32 only) |
3324| SPARC        | `r6`/`g6`, `r7`/`g7`                    | Reserved for system. |
3325| SPARC        | `r31`/`i7`                              | Return address cannot be used as inputs or outputs. |
3326
3327
3328## Template modifiers
3329
3330| Architecture | Register class | Modifier | Example output | LLVM modifier |
3331| ------------ | -------------- | -------- | -------------- | ------------- |
3332| MIPS         | `reg`          | None     | `$2`           | None          |
3333| MIPS         | `freg`         | None     | `$f0`          | None          |
3334| NVPTX        | `reg16`        | None     | `rs0`          | None          |
3335| NVPTX        | `reg32`        | None     | `r0`           | None          |
3336| NVPTX        | `reg64`        | None     | `rd0`          | None          |
3337| Hexagon      | `reg`          | None     | `r0`           | None          |
3338| SPARC        | `reg`          | None     | `%o0`          | None          |
3339| CSKY         | `reg`          | None     | `r0`           | None          |
3340| CSKY         | `freg`         | None     | `f0`           | None          |
3341
3342# Flags covered by `preserves_flags`
3343
3344These flags registers must be restored upon exiting the asm block if the `preserves_flags` option is set:
3345- AVR
3346  - The status register `SREG`.
3347- MSP430
3348  - The status register `r2`.
3349- M68k
3350  - The condition code register `ccr`.
3351- SPARC
3352  - Integer condition codes (`icc` and `xcc`)
3353  - Floating-point condition codes (`fcc[0-3]`)
3354- CSKY
3355  - Condition/carry bit (C) in `PSR`.
3356"##,
3357        default_severity: Severity::Allow,
3358        warn_since: None,
3359        deny_since: None,
3360    },
3361    Lint {
3362        label: "asm_experimental_reg",
3363        description: r##"# `asm_experimental_arch`
3364
3365The tracking issue for this feature is: [#133416]
3366
3367[#133416]: https://github.com/rust-lang/rust/issues/133416
3368
3369------------------------
3370
3371This tracks support for additional registers in architectures where inline assembly is already stable.
3372
3373## Register classes
3374
3375| Architecture | Register class | Registers | LLVM constraint code |
3376| ------------ | -------------- | --------- | -------------------- |
3377
3378## Register class supported types
3379
3380| Architecture | Register class | Target feature | Allowed types |
3381| ------------ | -------------- | -------------- | ------------- |
3382| x86 | `xmm_reg` | `sse` | `i128` |
3383| x86 | `ymm_reg` | `avx` | `i128` |
3384| x86 | `zmm_reg` | `avx512f` | `i128` |
3385
3386## Register aliases
3387
3388| Architecture | Base register | Aliases |
3389| ------------ | ------------- | ------- |
3390
3391## Unsupported registers
3392
3393| Architecture | Unsupported register | Reason |
3394| ------------ | -------------------- | ------ |
3395
3396## Template modifiers
3397
3398| Architecture | Register class | Modifier | Example output | LLVM modifier |
3399| ------------ | -------------- | -------- | -------------- | ------------- |
3400"##,
3401        default_severity: Severity::Allow,
3402        warn_since: None,
3403        deny_since: None,
3404    },
3405    Lint {
3406        label: "asm_goto_with_outputs",
3407        description: r##"# `asm_goto_with_outputs`
3408
3409The tracking issue for this feature is: [#119364]
3410
3411[#119364]: https://github.com/rust-lang/rust/issues/119364
3412
3413------------------------
3414
3415This feature allows label operands to be used together with output operands.
3416
3417Example:
3418```rust,ignore (partial-example, x86-only)
3419
3420unsafe {
3421    let a: usize;
3422    asm!(
3423        "mov {}, 1"
3424        "jmp {}",
3425        out(reg) a,
3426        label {
3427            println!("Jumped from asm {}!", a);
3428        }
3429    );
3430}
3431```
3432
3433The output operands are assigned before the label blocks are executed.
3434"##,
3435        default_severity: Severity::Allow,
3436        warn_since: None,
3437        deny_since: None,
3438    },
3439    Lint {
3440        label: "asm_unwind",
3441        description: r##"# `asm_unwind`
3442
3443The tracking issue for this feature is: [#93334]
3444
3445[#93334]: https://github.com/rust-lang/rust/issues/93334
3446
3447------------------------
3448
3449This feature adds a `may_unwind` option to `asm!` which allows an `asm` block to unwind stack and be part of the stack unwinding process. This option is only supported by the LLVM backend right now.
3450"##,
3451        default_severity: Severity::Allow,
3452        warn_since: None,
3453        deny_since: None,
3454    },
3455    Lint {
3456        label: "associated_type_defaults",
3457        description: r##"# `associated_type_defaults`
3458
3459Allows associated type defaults.
3460
3461The tracking issue for this feature is: [#29661]
3462
3463[#29661]: https://github.com/rust-lang/rust/issues/29661
3464
3465------------------------
3466"##,
3467        default_severity: Severity::Allow,
3468        warn_since: None,
3469        deny_since: None,
3470    },
3471    Lint {
3472        label: "async_drop",
3473        description: r##"# `async_drop`
3474
3475Allows implementing `AsyncDrop`.
3476
3477The tracking issue for this feature is: [#126482]
3478
3479[#126482]: https://github.com/rust-lang/rust/issues/126482
3480
3481------------------------
3482"##,
3483        default_severity: Severity::Allow,
3484        warn_since: None,
3485        deny_since: None,
3486    },
3487    Lint {
3488        label: "async_fn_in_dyn_trait",
3489        description: r##"# `async_fn_in_dyn_trait`
3490
3491Allows async functions to be called from `dyn Trait`.
3492
3493The tracking issue for this feature is: [#133119]
3494
3495[#133119]: https://github.com/rust-lang/rust/issues/133119
3496
3497------------------------
3498"##,
3499        default_severity: Severity::Allow,
3500        warn_since: None,
3501        deny_since: None,
3502    },
3503    Lint {
3504        label: "async_fn_track_caller",
3505        description: r##"# `async_fn_track_caller`
3506
3507Allows `#[track_caller]` on async functions.
3508
3509The tracking issue for this feature is: [#110011]
3510
3511[#110011]: https://github.com/rust-lang/rust/issues/110011
3512
3513------------------------
3514"##,
3515        default_severity: Severity::Allow,
3516        warn_since: None,
3517        deny_since: None,
3518    },
3519    Lint {
3520        label: "async_fn_traits",
3521        description: r##"# `async_fn_traits`
3522
3523See Also: [`fn_traits`](../library-features/fn-traits.md)
3524
3525----
3526
3527The `async_fn_traits` feature allows for implementation of the [`AsyncFn*`] traits
3528for creating custom closure-like types that return futures.
3529
3530[`AsyncFn*`]: ../../std/ops/trait.AsyncFn.html
3531
3532The main difference to the `Fn*` family of traits is that `AsyncFn` can return a future
3533that borrows from itself (`FnOnce::Output` has no lifetime parameters, while `AsyncFnMut::CallRefFuture` does).
3534"##,
3535        default_severity: Severity::Allow,
3536        warn_since: None,
3537        deny_since: None,
3538    },
3539    Lint {
3540        label: "async_for_loop",
3541        description: r##"# `async_for_loop`
3542
3543Allows `for await` loops.
3544
3545The tracking issue for this feature is: [#118898]
3546
3547[#118898]: https://github.com/rust-lang/rust/issues/118898
3548
3549------------------------
3550"##,
3551        default_severity: Severity::Allow,
3552        warn_since: None,
3553        deny_since: None,
3554    },
3555    Lint {
3556        label: "async_gen_internals",
3557        description: r##"# `async_gen_internals`
3558
3559
3560
3561This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
3562
3563------------------------
3564"##,
3565        default_severity: Severity::Allow,
3566        warn_since: None,
3567        deny_since: None,
3568    },
3569    Lint {
3570        label: "async_iter_from_iter",
3571        description: r##"# `async_iter_from_iter`
3572
3573
3574
3575The tracking issue for this feature is: [#81798]
3576
3577[#81798]: https://github.com/rust-lang/rust/issues/81798
3578
3579------------------------
3580"##,
3581        default_severity: Severity::Allow,
3582        warn_since: None,
3583        deny_since: None,
3584    },
3585    Lint {
3586        label: "async_iterator",
3587        description: r##"# `async_iterator`
3588
3589
3590
3591The tracking issue for this feature is: [#79024]
3592
3593[#79024]: https://github.com/rust-lang/rust/issues/79024
3594
3595------------------------
3596"##,
3597        default_severity: Severity::Allow,
3598        warn_since: None,
3599        deny_since: None,
3600    },
3601    Lint {
3602        label: "async_trait_bounds",
3603        description: r##"# `async_trait_bounds`
3604
3605Allows `async` trait bound modifier.
3606
3607The tracking issue for this feature is: [#62290]
3608
3609[#62290]: https://github.com/rust-lang/rust/issues/62290
3610
3611------------------------
3612"##,
3613        default_severity: Severity::Allow,
3614        warn_since: None,
3615        deny_since: None,
3616    },
3617    Lint {
3618        label: "atomic_from_mut",
3619        description: r##"# `atomic_from_mut`
3620
3621
3622
3623The tracking issue for this feature is: [#76314]
3624
3625[#76314]: https://github.com/rust-lang/rust/issues/76314
3626
3627------------------------
3628"##,
3629        default_severity: Severity::Allow,
3630        warn_since: None,
3631        deny_since: None,
3632    },
3633    Lint {
3634        label: "atomic_internals",
3635        description: r##"# `atomic_internals`
3636
3637
3638
3639This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
3640
3641------------------------
3642"##,
3643        default_severity: Severity::Allow,
3644        warn_since: None,
3645        deny_since: None,
3646    },
3647    Lint {
3648        label: "atomic_ptr_null",
3649        description: r##"# `atomic_ptr_null`
3650
3651
3652
3653The tracking issue for this feature is: [#150733]
3654
3655[#150733]: https://github.com/rust-lang/rust/issues/150733
3656
3657------------------------
3658"##,
3659        default_severity: Severity::Allow,
3660        warn_since: None,
3661        deny_since: None,
3662    },
3663    Lint {
3664        label: "auto_traits",
3665        description: r##"# `auto_traits`
3666
3667The tracking issue for this feature is [#13231]
3668
3669[#13231]: https://github.com/rust-lang/rust/issues/13231
3670
3671----
3672
3673The `auto_traits` feature gate allows you to define auto traits.
3674
3675Auto traits, like [`Send`] or [`Sync`] in the standard library, are marker traits
3676that are automatically implemented for every type, unless the type, or a type it contains,
3677has explicitly opted out via a negative impl. (Negative impls are separately controlled
3678by the `negative_impls` feature.)
3679
3680[`Send`]: ../../std/marker/trait.Send.html
3681[`Sync`]: ../../std/marker/trait.Sync.html
3682
3683```rust,ignore (partial-example)
3684impl !Trait for Type {}
3685```
3686
3687Example:
3688
3689```rust
3690#![feature(negative_impls)]
3691#![feature(auto_traits)]
3692
3693auto trait Valid {}
3694
3695struct True;
3696struct False;
3697
3698impl !Valid for False {}
3699
3700struct MaybeValid<T>(T);
3701
3702fn must_be_valid<T: Valid>(_t: T) { }
3703
3704fn main() {
3705    // works
3706    must_be_valid( MaybeValid(True) );
3707
3708    // compiler error - trait bound not satisfied
3709    // must_be_valid( MaybeValid(False) );
3710}
3711```
3712
3713## Automatic trait implementations
3714
3715When a type is declared as an `auto trait`, we will automatically
3716create impls for every struct/enum/union, unless an explicit impl is
3717provided. These automatic impls contain a where clause for each field
3718of the form `T: AutoTrait`, where `T` is the type of the field and
3719`AutoTrait` is the auto trait in question. As an example, consider the
3720struct `List` and the auto trait `Send`:
3721
3722```rust
3723struct List<T> {
3724  data: T,
3725  next: Option<Box<List<T>>>,
3726}
3727```
3728
3729Presuming that there is no explicit impl of `Send` for `List`, the
3730compiler will supply an automatic impl of the form:
3731
3732```rust
3733struct List<T> {
3734  data: T,
3735  next: Option<Box<List<T>>>,
3736}
3737
3738unsafe impl<T> Send for List<T>
3739where
3740  T: Send, // from the field `data`
3741  Option<Box<List<T>>>: Send, // from the field `next`
3742{ }
3743```
3744
3745Explicit impls may be either positive or negative. They take the form:
3746
3747```rust,ignore (partial-example)
3748impl<...> AutoTrait for StructName<..> { }
3749impl<...> !AutoTrait for StructName<..> { }
3750```
3751
3752## Coinduction: Auto traits permit cyclic matching
3753
3754Unlike ordinary trait matching, auto traits are **coinductive**. This
3755means, in short, that cycles which occur in trait matching are
3756considered ok. As an example, consider the recursive struct `List`
3757introduced in the previous section. In attempting to determine whether
3758`List: Send`, we would wind up in a cycle: to apply the impl, we must
3759show that `Option<Box<List>>: Send`, which will in turn require
3760`Box<List>: Send` and then finally `List: Send` again. Under ordinary
3761trait matching, this cycle would be an error, but for an auto trait it
3762is considered a successful match.
3763
3764## Items
3765
3766Auto traits cannot have any trait items, such as methods or associated types. This ensures that we can generate default implementations.
3767
3768## Supertraits
3769
3770Auto traits cannot have supertraits. This is for soundness reasons, as the interaction of coinduction with implied bounds is difficult to reconcile.
3771"##,
3772        default_severity: Severity::Allow,
3773        warn_since: None,
3774        deny_since: None,
3775    },
3776    Lint {
3777        label: "autodiff",
3778        description: r##"# `autodiff`
3779
3780
3781
3782The tracking issue for this feature is: [#124509]
3783
3784[#124509]: https://github.com/rust-lang/rust/issues/124509
3785
3786------------------------
3787"##,
3788        default_severity: Severity::Allow,
3789        warn_since: None,
3790        deny_since: None,
3791    },
3792    Lint {
3793        label: "avr_target_feature",
3794        description: r##"# `avr_target_feature`
3795
3796Target features on avr.
3797
3798The tracking issue for this feature is: [#146889]
3799
3800[#146889]: https://github.com/rust-lang/rust/issues/146889
3801
3802------------------------
3803"##,
3804        default_severity: Severity::Allow,
3805        warn_since: None,
3806        deny_since: None,
3807    },
3808    Lint {
3809        label: "avx10_target_feature",
3810        description: r##"# `avx10_target_feature`
3811
3812Allows using Intel AVX10 target features and intrinsics
3813
3814The tracking issue for this feature is: [#138843]
3815
3816[#138843]: https://github.com/rust-lang/rust/issues/138843
3817
3818------------------------
3819"##,
3820        default_severity: Severity::Allow,
3821        warn_since: None,
3822        deny_since: None,
3823    },
3824    Lint {
3825        label: "backtrace_frames",
3826        description: r##"# `backtrace_frames`
3827
3828
3829
3830The tracking issue for this feature is: [#79676]
3831
3832[#79676]: https://github.com/rust-lang/rust/issues/79676
3833
3834------------------------
3835"##,
3836        default_severity: Severity::Allow,
3837        warn_since: None,
3838        deny_since: None,
3839    },
3840    Lint {
3841        label: "bikeshed_guaranteed_no_drop",
3842        description: r##"# `bikeshed_guaranteed_no_drop`
3843
3844
3845
3846This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
3847
3848------------------------
3849"##,
3850        default_severity: Severity::Allow,
3851        warn_since: None,
3852        deny_since: None,
3853    },
3854    Lint {
3855        label: "binary_heap_as_mut_slice",
3856        description: r##"# `binary_heap_as_mut_slice`
3857
3858
3859
3860The tracking issue for this feature is: [#154009]
3861
3862[#154009]: https://github.com/rust-lang/rust/issues/154009
3863
3864------------------------
3865"##,
3866        default_severity: Severity::Allow,
3867        warn_since: None,
3868        deny_since: None,
3869    },
3870    Lint {
3871        label: "binary_heap_drain_sorted",
3872        description: r##"# `binary_heap_drain_sorted`
3873
3874
3875
3876The tracking issue for this feature is: [#59278]
3877
3878[#59278]: https://github.com/rust-lang/rust/issues/59278
3879
3880------------------------
3881"##,
3882        default_severity: Severity::Allow,
3883        warn_since: None,
3884        deny_since: None,
3885    },
3886    Lint {
3887        label: "binary_heap_from_raw_vec",
3888        description: r##"# `binary_heap_from_raw_vec`
3889
3890
3891
3892The tracking issue for this feature is: [#152500]
3893
3894[#152500]: https://github.com/rust-lang/rust/issues/152500
3895
3896------------------------
3897"##,
3898        default_severity: Severity::Allow,
3899        warn_since: None,
3900        deny_since: None,
3901    },
3902    Lint {
3903        label: "binary_heap_into_iter_sorted",
3904        description: r##"# `binary_heap_into_iter_sorted`
3905
3906
3907
3908The tracking issue for this feature is: [#59278]
3909
3910[#59278]: https://github.com/rust-lang/rust/issues/59278
3911
3912------------------------
3913"##,
3914        default_severity: Severity::Allow,
3915        warn_since: None,
3916        deny_since: None,
3917    },
3918    Lint {
3919        label: "binary_heap_peek_mut_refresh",
3920        description: r##"# `binary_heap_peek_mut_refresh`
3921
3922
3923
3924The tracking issue for this feature is: [#138355]
3925
3926[#138355]: https://github.com/rust-lang/rust/issues/138355
3927
3928------------------------
3929"##,
3930        default_severity: Severity::Allow,
3931        warn_since: None,
3932        deny_since: None,
3933    },
3934    Lint {
3935        label: "binary_heap_pop_if",
3936        description: r##"# `binary_heap_pop_if`
3937
3938
3939
3940The tracking issue for this feature is: [#151828]
3941
3942[#151828]: https://github.com/rust-lang/rust/issues/151828
3943
3944------------------------
3945"##,
3946        default_severity: Severity::Allow,
3947        warn_since: None,
3948        deny_since: None,
3949    },
3950    Lint {
3951        label: "bool_to_result",
3952        description: r##"# `bool_to_result`
3953
3954
3955
3956The tracking issue for this feature is: [#142748]
3957
3958[#142748]: https://github.com/rust-lang/rust/issues/142748
3959
3960------------------------
3961"##,
3962        default_severity: Severity::Allow,
3963        warn_since: None,
3964        deny_since: None,
3965    },
3966    Lint {
3967        label: "borrowed_buf_init",
3968        description: r##"# `borrowed_buf_init`
3969
3970
3971
3972The tracking issue for this feature is: [#78485]
3973
3974[#78485]: https://github.com/rust-lang/rust/issues/78485
3975
3976------------------------
3977"##,
3978        default_severity: Severity::Allow,
3979        warn_since: None,
3980        deny_since: None,
3981    },
3982    Lint {
3983        label: "bound_as_ref",
3984        description: r##"# `bound_as_ref`
3985
3986
3987
3988The tracking issue for this feature is: [#80996]
3989
3990[#80996]: https://github.com/rust-lang/rust/issues/80996
3991
3992------------------------
3993"##,
3994        default_severity: Severity::Allow,
3995        warn_since: None,
3996        deny_since: None,
3997    },
3998    Lint {
3999        label: "bound_copied",
4000        description: r##"# `bound_copied`
4001
4002
4003
4004The tracking issue for this feature is: [#145966]
4005
4006[#145966]: https://github.com/rust-lang/rust/issues/145966
4007
4008------------------------
4009"##,
4010        default_severity: Severity::Allow,
4011        warn_since: None,
4012        deny_since: None,
4013    },
4014    Lint {
4015        label: "box_as_ptr",
4016        description: r##"# `box_as_ptr`
4017
4018
4019
4020The tracking issue for this feature is: [#129090]
4021
4022[#129090]: https://github.com/rust-lang/rust/issues/129090
4023
4024------------------------
4025"##,
4026        default_severity: Severity::Allow,
4027        warn_since: None,
4028        deny_since: None,
4029    },
4030    Lint {
4031        label: "box_into_boxed_slice",
4032        description: r##"# `box_into_boxed_slice`
4033
4034
4035
4036The tracking issue for this feature is: [#71582]
4037
4038[#71582]: https://github.com/rust-lang/rust/issues/71582
4039
4040------------------------
4041"##,
4042        default_severity: Severity::Allow,
4043        warn_since: None,
4044        deny_since: None,
4045    },
4046    Lint {
4047        label: "box_into_inner",
4048        description: r##"# `box_into_inner`
4049
4050
4051
4052The tracking issue for this feature is: [#80437]
4053
4054[#80437]: https://github.com/rust-lang/rust/issues/80437
4055
4056------------------------
4057"##,
4058        default_severity: Severity::Allow,
4059        warn_since: None,
4060        deny_since: None,
4061    },
4062    Lint {
4063        label: "box_patterns",
4064        description: r##"# `box_patterns`
4065
4066The tracking issue for this feature is: [#29641]
4067
4068[#29641]: https://github.com/rust-lang/rust/issues/29641
4069
4070------------------------
4071
4072> **Note**: This feature will be superseded by [`deref_patterns`] in the future.
4073
4074Box patterns let you match on `Box<T>`s:
4075
4076
4077```rust
4078#![feature(box_patterns)]
4079
4080fn main() {
4081    let b = Some(Box::new(5));
4082    match b {
4083        Some(box n) if n < 0 => {
4084            println!("Box contains negative number {n}");
4085        },
4086        Some(box n) if n >= 0 => {
4087            println!("Box contains non-negative number {n}");
4088        },
4089        None => {
4090            println!("No box");
4091        },
4092        _ => unreachable!()
4093    }
4094}
4095```
4096
4097[`deref_patterns`]: ./deref-patterns.md
4098"##,
4099        default_severity: Severity::Allow,
4100        warn_since: None,
4101        deny_since: None,
4102    },
4103    Lint {
4104        label: "box_take",
4105        description: r##"# `box_take`
4106
4107
4108
4109The tracking issue for this feature is: [#147212]
4110
4111[#147212]: https://github.com/rust-lang/rust/issues/147212
4112
4113------------------------
4114"##,
4115        default_severity: Severity::Allow,
4116        warn_since: None,
4117        deny_since: None,
4118    },
4119    Lint {
4120        label: "box_vec_non_null",
4121        description: r##"# `box_vec_non_null`
4122
4123
4124
4125The tracking issue for this feature is: [#130364]
4126
4127[#130364]: https://github.com/rust-lang/rust/issues/130364
4128
4129------------------------
4130"##,
4131        default_severity: Severity::Allow,
4132        warn_since: None,
4133        deny_since: None,
4134    },
4135    Lint {
4136        label: "bpf_target_feature",
4137        description: r##"# `bpf_target_feature`
4138
4139Target features on bpf.
4140
4141The tracking issue for this feature is: [#150247]
4142
4143[#150247]: https://github.com/rust-lang/rust/issues/150247
4144
4145------------------------
4146"##,
4147        default_severity: Severity::Allow,
4148        warn_since: None,
4149        deny_since: None,
4150    },
4151    Lint {
4152        label: "breakpoint",
4153        description: r##"# `breakpoint`
4154
4155
4156
4157The tracking issue for this feature is: [#133724]
4158
4159[#133724]: https://github.com/rust-lang/rust/issues/133724
4160
4161------------------------
4162"##,
4163        default_severity: Severity::Allow,
4164        warn_since: None,
4165        deny_since: None,
4166    },
4167    Lint {
4168        label: "bstr",
4169        description: r##"# `bstr`
4170
4171
4172
4173The tracking issue for this feature is: [#134915]
4174
4175[#134915]: https://github.com/rust-lang/rust/issues/134915
4176
4177------------------------
4178"##,
4179        default_severity: Severity::Allow,
4180        warn_since: None,
4181        deny_since: None,
4182    },
4183    Lint {
4184        label: "bstr_internals",
4185        description: r##"# `bstr_internals`
4186
4187
4188
4189This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
4190
4191------------------------
4192"##,
4193        default_severity: Severity::Allow,
4194        warn_since: None,
4195        deny_since: None,
4196    },
4197    Lint {
4198        label: "btree_cursors",
4199        description: r##"# `btree_cursors`
4200
4201
4202
4203The tracking issue for this feature is: [#107540]
4204
4205[#107540]: https://github.com/rust-lang/rust/issues/107540
4206
4207------------------------
4208"##,
4209        default_severity: Severity::Allow,
4210        warn_since: None,
4211        deny_since: None,
4212    },
4213    Lint {
4214        label: "btree_merge",
4215        description: r##"# `btree_merge`
4216
4217
4218
4219The tracking issue for this feature is: [#152152]
4220
4221[#152152]: https://github.com/rust-lang/rust/issues/152152
4222
4223------------------------
4224"##,
4225        default_severity: Severity::Allow,
4226        warn_since: None,
4227        deny_since: None,
4228    },
4229    Lint {
4230        label: "btree_set_entry",
4231        description: r##"# `btree_set_entry`
4232
4233
4234
4235The tracking issue for this feature is: [#133549]
4236
4237[#133549]: https://github.com/rust-lang/rust/issues/133549
4238
4239------------------------
4240"##,
4241        default_severity: Severity::Allow,
4242        warn_since: None,
4243        deny_since: None,
4244    },
4245    Lint {
4246        label: "btreemap_alloc",
4247        description: r##"# `btreemap_alloc`
4248
4249
4250
4251The tracking issue for this feature is: [#32838]
4252
4253[#32838]: https://github.com/rust-lang/rust/issues/32838
4254
4255------------------------
4256"##,
4257        default_severity: Severity::Allow,
4258        warn_since: None,
4259        deny_since: None,
4260    },
4261    Lint {
4262        label: "buf_read_has_data_left",
4263        description: r##"# `buf_read_has_data_left`
4264
4265
4266
4267The tracking issue for this feature is: [#86423]
4268
4269[#86423]: https://github.com/rust-lang/rust/issues/86423
4270
4271------------------------
4272"##,
4273        default_severity: Severity::Allow,
4274        warn_since: None,
4275        deny_since: None,
4276    },
4277    Lint {
4278        label: "bufreader_peek",
4279        description: r##"# `bufreader_peek`
4280
4281
4282
4283The tracking issue for this feature is: [#128405]
4284
4285[#128405]: https://github.com/rust-lang/rust/issues/128405
4286
4287------------------------
4288"##,
4289        default_severity: Severity::Allow,
4290        warn_since: None,
4291        deny_since: None,
4292    },
4293    Lint {
4294        label: "builtin_syntax",
4295        description: r##"# `builtin_syntax`
4296
4297Allows builtin # foo() syntax
4298
4299The tracking issue for this feature is: [#110680]
4300
4301[#110680]: https://github.com/rust-lang/rust/issues/110680
4302
4303------------------------
4304"##,
4305        default_severity: Severity::Allow,
4306        warn_since: None,
4307        deny_since: None,
4308    },
4309    Lint {
4310        label: "c_size_t",
4311        description: r##"# `c_size_t`
4312
4313
4314
4315The tracking issue for this feature is: [#88345]
4316
4317[#88345]: https://github.com/rust-lang/rust/issues/88345
4318
4319------------------------
4320"##,
4321        default_severity: Severity::Allow,
4322        warn_since: None,
4323        deny_since: None,
4324    },
4325    Lint {
4326        label: "c_variadic",
4327        description: r##"# `c_variadic`
4328
4329The tracking issue for this feature is: [#44930]
4330
4331[#44930]: https://github.com/rust-lang/rust/issues/44930
4332
4333------------------------
4334
4335The `c_variadic` language feature enables C-variadic functions to be
4336defined in Rust. They may be called both from within Rust and via FFI.
4337
4338## Examples
4339
4340```rust
4341#![feature(c_variadic)]
4342
4343pub unsafe extern "C" fn add(n: usize, mut args: ...) -> usize {
4344    let mut sum = 0;
4345    for _ in 0..n {
4346        sum += args.next_arg::<usize>();
4347    }
4348    sum
4349}
4350```
4351"##,
4352        default_severity: Severity::Allow,
4353        warn_since: None,
4354        deny_since: None,
4355    },
4356    Lint {
4357        label: "c_variadic_experimental_arch",
4358        description: r##"# `c_variadic_experimental_arch`
4359
4360Allows defining c-variadic functions on targets where this feature has not yet undergone sufficient testing for stabilization.
4361
4362The tracking issue for this feature is: [#155973]
4363
4364[#155973]: https://github.com/rust-lang/rust/issues/155973
4365
4366------------------------
4367"##,
4368        default_severity: Severity::Allow,
4369        warn_since: None,
4370        deny_since: None,
4371    },
4372    Lint {
4373        label: "c_variadic_naked_functions",
4374        description: r##"# `c_variadic_naked_functions`
4375
4376Allows defining c-variadic naked functions with any extern ABI that is allowed on c-variadic foreign functions.
4377
4378The tracking issue for this feature is: [#148767]
4379
4380[#148767]: https://github.com/rust-lang/rust/issues/148767
4381
4382------------------------
4383"##,
4384        default_severity: Severity::Allow,
4385        warn_since: None,
4386        deny_since: None,
4387    },
4388    Lint {
4389        label: "c_void_variant",
4390        description: r##"# `c_void_variant`
4391
4392This feature is internal to the Rust compiler and is not intended for general use.
4393
4394------------------------
4395"##,
4396        default_severity: Severity::Allow,
4397        warn_since: None,
4398        deny_since: None,
4399    },
4400    Lint {
4401        label: "can_vector",
4402        description: r##"# `can_vector`
4403
4404
4405
4406The tracking issue for this feature is: [#69941]
4407
4408[#69941]: https://github.com/rust-lang/rust/issues/69941
4409
4410------------------------
4411"##,
4412        default_severity: Severity::Allow,
4413        warn_since: None,
4414        deny_since: None,
4415    },
4416    Lint {
4417        label: "case_ignorable",
4418        description: r##"# `case_ignorable`
4419
4420
4421
4422The tracking issue for this feature is: [#154848]
4423
4424[#154848]: https://github.com/rust-lang/rust/issues/154848
4425
4426------------------------
4427"##,
4428        default_severity: Severity::Allow,
4429        warn_since: None,
4430        deny_since: None,
4431    },
4432    Lint {
4433        label: "cast_maybe_uninit",
4434        description: r##"# `cast_maybe_uninit`
4435
4436
4437
4438The tracking issue for this feature is: [#145036]
4439
4440[#145036]: https://github.com/rust-lang/rust/issues/145036
4441
4442------------------------
4443"##,
4444        default_severity: Severity::Allow,
4445        warn_since: None,
4446        deny_since: None,
4447    },
4448    Lint {
4449        label: "cell_get_cloned",
4450        description: r##"# `cell_get_cloned`
4451
4452
4453
4454The tracking issue for this feature is: [#145329]
4455
4456[#145329]: https://github.com/rust-lang/rust/issues/145329
4457
4458------------------------
4459"##,
4460        default_severity: Severity::Allow,
4461        warn_since: None,
4462        deny_since: None,
4463    },
4464    Lint {
4465        label: "cell_leak",
4466        description: r##"# `cell_leak`
4467
4468
4469
4470The tracking issue for this feature is: [#69099]
4471
4472[#69099]: https://github.com/rust-lang/rust/issues/69099
4473
4474------------------------
4475"##,
4476        default_severity: Severity::Allow,
4477        warn_since: None,
4478        deny_since: None,
4479    },
4480    Lint {
4481        label: "cfg_accessible",
4482        description: r##"# `cfg_accessible`
4483
4484
4485
4486The tracking issue for this feature is: [#64797]
4487
4488[#64797]: https://github.com/rust-lang/rust/issues/64797
4489
4490------------------------
4491"##,
4492        default_severity: Severity::Allow,
4493        warn_since: None,
4494        deny_since: None,
4495    },
4496    Lint {
4497        label: "cfg_contract_checks",
4498        description: r##"# `cfg_contract_checks`
4499
4500Allows the use of `#[cfg(contract_checks)` to check if contract checks are enabled.
4501
4502The tracking issue for this feature is: [#128044]
4503
4504[#128044]: https://github.com/rust-lang/rust/issues/128044
4505
4506------------------------
4507"##,
4508        default_severity: Severity::Allow,
4509        warn_since: None,
4510        deny_since: None,
4511    },
4512    Lint {
4513        label: "cfg_emscripten_wasm_eh",
4514        description: r##"# `cfg_emscripten_wasm_eh`
4515
4516Allows access to the emscripten_wasm_eh config, used by panic_unwind and unwind
4517
4518This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
4519
4520------------------------
4521"##,
4522        default_severity: Severity::Allow,
4523        warn_since: None,
4524        deny_since: None,
4525    },
4526    Lint {
4527        label: "cfg_eval",
4528        description: r##"# `cfg_eval`
4529
4530
4531
4532The tracking issue for this feature is: [#82679]
4533
4534[#82679]: https://github.com/rust-lang/rust/issues/82679
4535
4536------------------------
4537"##,
4538        default_severity: Severity::Allow,
4539        warn_since: None,
4540        deny_since: None,
4541    },
4542    Lint {
4543        label: "cfg_overflow_checks",
4544        description: r##"# `cfg_overflow_checks`
4545
4546Allows the use of `#[cfg(overflow_checks)` to check if integer overflow behaviour.
4547
4548The tracking issue for this feature is: [#111466]
4549
4550[#111466]: https://github.com/rust-lang/rust/issues/111466
4551
4552------------------------
4553"##,
4554        default_severity: Severity::Allow,
4555        warn_since: None,
4556        deny_since: None,
4557    },
4558    Lint {
4559        label: "cfg_relocation_model",
4560        description: r##"# `cfg_relocation_model`
4561
4562Provides the relocation model information as cfg entry
4563
4564The tracking issue for this feature is: [#114929]
4565
4566[#114929]: https://github.com/rust-lang/rust/issues/114929
4567
4568------------------------
4569"##,
4570        default_severity: Severity::Allow,
4571        warn_since: None,
4572        deny_since: None,
4573    },
4574    Lint {
4575        label: "cfg_sanitize",
4576        description: r##"# `cfg_sanitize`
4577
4578The tracking issue for this feature is: [#39699]
4579
4580[#39699]: https://github.com/rust-lang/rust/issues/39699
4581
4582------------------------
4583
4584The `cfg_sanitize` feature makes it possible to execute different code
4585depending on whether a particular sanitizer is enabled or not.
4586
4587## Examples
4588
4589```rust
4590#![feature(cfg_sanitize)]
4591
4592#[cfg(sanitize = "thread")]
4593fn a() {
4594    // ...
4595}
4596
4597#[cfg(not(sanitize = "thread"))]
4598fn a() {
4599    // ...
4600}
4601
4602fn b() {
4603    if cfg!(sanitize = "leak") {
4604        // ...
4605    } else {
4606        // ...
4607    }
4608}
4609```
4610"##,
4611        default_severity: Severity::Allow,
4612        warn_since: None,
4613        deny_since: None,
4614    },
4615    Lint {
4616        label: "cfg_sanitizer_cfi",
4617        description: r##"# `cfg_sanitizer_cfi`
4618
4619Allows `cfg(sanitizer_cfi_generalize_pointers)` and `cfg(sanitizer_cfi_normalize_integers)`.
4620
4621The tracking issue for this feature is: [#89653]
4622
4623[#89653]: https://github.com/rust-lang/rust/issues/89653
4624
4625------------------------
4626"##,
4627        default_severity: Severity::Allow,
4628        warn_since: None,
4629        deny_since: None,
4630    },
4631    Lint {
4632        label: "cfg_target_compact",
4633        description: r##"# `cfg_target_compact`
4634
4635Allows `cfg(target(abi = "..."))`.
4636
4637The tracking issue for this feature is: [#96901]
4638
4639[#96901]: https://github.com/rust-lang/rust/issues/96901
4640
4641------------------------
4642"##,
4643        default_severity: Severity::Allow,
4644        warn_since: None,
4645        deny_since: None,
4646    },
4647    Lint {
4648        label: "cfg_target_has_atomic",
4649        description: r##"# `cfg_target_has_atomic`
4650
4651Allows `cfg(target_has_atomic_load_store = "...")`.
4652
4653The tracking issue for this feature is: [#94039]
4654
4655[#94039]: https://github.com/rust-lang/rust/issues/94039
4656
4657------------------------
4658"##,
4659        default_severity: Severity::Allow,
4660        warn_since: None,
4661        deny_since: None,
4662    },
4663    Lint {
4664        label: "cfg_target_has_atomic_equal_alignment",
4665        description: r##"# `cfg_target_has_atomic_equal_alignment`
4666
4667Allows `cfg(target_has_atomic_equal_alignment = "...")`.
4668
4669The tracking issue for this feature is: [#93822]
4670
4671[#93822]: https://github.com/rust-lang/rust/issues/93822
4672
4673------------------------
4674"##,
4675        default_severity: Severity::Allow,
4676        warn_since: None,
4677        deny_since: None,
4678    },
4679    Lint {
4680        label: "cfg_target_has_reliable_f16_f128",
4681        description: r##"# `cfg_target_has_reliable_f16_f128`
4682
4683Allows checking whether or not the backend correctly supports unstable float types.
4684
4685This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
4686
4687------------------------
4688"##,
4689        default_severity: Severity::Allow,
4690        warn_since: None,
4691        deny_since: None,
4692    },
4693    Lint {
4694        label: "cfg_target_object_format",
4695        description: r##"# `cfg_target_object_format`
4696
4697The tracking issue for this feature is: [#152586]
4698
4699[#152586]: https://github.com/rust-lang/rust/issues/152586
4700
4701------------------------
4702
4703The `cfg_target_object_format` feature makes it possible to execute different code
4704depending on the current target's object file format.
4705
4706## Examples
4707
4708```rust
4709#![feature(cfg_target_object_format)]
4710
4711#[cfg(target_object_format = "elf")]
4712fn a() {
4713    // ...
4714}
4715
4716#[cfg(target_object_format = "mach-o")]
4717fn a() {
4718    // ...
4719}
4720
4721fn b() {
4722    if cfg!(target_object_format = "wasm") {
4723        // ...
4724    } else {
4725        // ...
4726    }
4727}
4728```
4729"##,
4730        default_severity: Severity::Allow,
4731        warn_since: None,
4732        deny_since: None,
4733    },
4734    Lint {
4735        label: "cfg_target_thread_local",
4736        description: r##"# `cfg_target_thread_local`
4737
4738Allows `cfg(target_thread_local)`.
4739
4740The tracking issue for this feature is: [#29594]
4741
4742[#29594]: https://github.com/rust-lang/rust/issues/29594
4743
4744------------------------
4745"##,
4746        default_severity: Severity::Allow,
4747        warn_since: None,
4748        deny_since: None,
4749    },
4750    Lint {
4751        label: "cfg_ub_checks",
4752        description: r##"# `cfg_ub_checks`
4753
4754Allows the use of `#[cfg(ub_checks)` to check if UB checks are enabled.
4755
4756The tracking issue for this feature is: [#123499]
4757
4758[#123499]: https://github.com/rust-lang/rust/issues/123499
4759
4760------------------------
4761"##,
4762        default_severity: Severity::Allow,
4763        warn_since: None,
4764        deny_since: None,
4765    },
4766    Lint {
4767        label: "cfg_version",
4768        description: r##"# `cfg_version`
4769
4770The tracking issue for this feature is: [#64796]
4771
4772[#64796]: https://github.com/rust-lang/rust/issues/64796
4773
4774------------------------
4775
4776The `cfg_version` feature makes it possible to execute different code
4777depending on the compiler version. It will return true if the compiler
4778version is greater than or equal to the specified version.
4779
4780## Examples
4781
4782```rust
4783#![feature(cfg_version)]
4784
4785#[cfg(version("1.42"))] // 1.42 and above
4786fn a() {
4787    // ...
4788}
4789
4790#[cfg(not(version("1.42")))] // 1.41 and below
4791fn a() {
4792    // ...
4793}
4794
4795fn b() {
4796    if cfg!(version("1.42")) {
4797        // ...
4798    } else {
4799        // ...
4800    }
4801}
4802```
4803"##,
4804        default_severity: Severity::Allow,
4805        warn_since: None,
4806        deny_since: None,
4807    },
4808    Lint {
4809        label: "cfi_encoding",
4810        description: r##"# `cfi_encoding`
4811
4812The tracking issue for this feature is: [#89653]
4813
4814[#89653]: https://github.com/rust-lang/rust/issues/89653
4815
4816------------------------
4817
4818The `cfi_encoding` feature allows the user to define a CFI encoding for a type.
4819It allows the user to use a different names for types that otherwise would be
4820required to have the same name as used in externally defined C functions.
4821
4822## Examples
4823
4824```rust
4825#![feature(cfi_encoding, extern_types)]
4826
4827#[cfi_encoding = "3Foo"]
4828pub struct Type1(i32);
4829
4830extern {
4831    #[cfi_encoding = "3Bar"]
4832    type Type2;
4833}
4834```
4835"##,
4836        default_severity: Severity::Allow,
4837        warn_since: None,
4838        deny_since: None,
4839    },
4840    Lint {
4841        label: "char_internals",
4842        description: r##"# `char_internals`
4843
4844
4845
4846This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
4847
4848------------------------
4849"##,
4850        default_severity: Severity::Allow,
4851        warn_since: None,
4852        deny_since: None,
4853    },
4854    Lint {
4855        label: "clamp_magnitude",
4856        description: r##"# `clamp_magnitude`
4857
4858
4859
4860The tracking issue for this feature is: [#148519]
4861
4862[#148519]: https://github.com/rust-lang/rust/issues/148519
4863
4864------------------------
4865"##,
4866        default_severity: Severity::Allow,
4867        warn_since: None,
4868        deny_since: None,
4869    },
4870    Lint {
4871        label: "clone_from_ref",
4872        description: r##"# `clone_from_ref`
4873
4874
4875
4876The tracking issue for this feature is: [#149075]
4877
4878[#149075]: https://github.com/rust-lang/rust/issues/149075
4879
4880------------------------
4881"##,
4882        default_severity: Severity::Allow,
4883        warn_since: None,
4884        deny_since: None,
4885    },
4886    Lint {
4887        label: "clone_to_uninit",
4888        description: r##"# `clone_to_uninit`
4889
4890
4891
4892The tracking issue for this feature is: [#126799]
4893
4894[#126799]: https://github.com/rust-lang/rust/issues/126799
4895
4896------------------------
4897"##,
4898        default_severity: Severity::Allow,
4899        warn_since: None,
4900        deny_since: None,
4901    },
4902    Lint {
4903        label: "closure_lifetime_binder",
4904        description: r##"# `closure_lifetime_binder`
4905
4906Allows `for<...>` on closures and coroutines.
4907
4908The tracking issue for this feature is: [#97362]
4909
4910[#97362]: https://github.com/rust-lang/rust/issues/97362
4911
4912------------------------
4913"##,
4914        default_severity: Severity::Allow,
4915        warn_since: None,
4916        deny_since: None,
4917    },
4918    Lint {
4919        label: "closure_track_caller",
4920        description: r##"# `closure_track_caller`
4921
4922The tracking issue for this feature is: [#87417]
4923
4924[#87417]: https://github.com/rust-lang/rust/issues/87417
4925
4926------------------------
4927
4928Allows using the `#[track_caller]` attribute on closures and coroutines.
4929Calls made to the closure or coroutine will have caller information
4930available through `std::panic::Location::caller()`, just like using
4931`#[track_caller]` on a function.
4932"##,
4933        default_severity: Severity::Allow,
4934        warn_since: None,
4935        deny_since: None,
4936    },
4937    Lint {
4938        label: "cmp_minmax",
4939        description: r##"# `cmp_minmax`
4940
4941
4942
4943The tracking issue for this feature is: [#115939]
4944
4945[#115939]: https://github.com/rust-lang/rust/issues/115939
4946
4947------------------------
4948"##,
4949        default_severity: Severity::Allow,
4950        warn_since: None,
4951        deny_since: None,
4952    },
4953    Lint {
4954        label: "cmse_nonsecure_entry",
4955        description: r##"# `cmse_nonsecure_entry`
4956
4957The tracking issue for this feature is: [#75835]
4958
4959[#75835]: https://github.com/rust-lang/rust/issues/75835
4960
4961------------------------
4962
4963The [TrustZone-M
4964feature](https://developer.arm.com/documentation/100690/latest/) is available
4965for targets with the Armv8-M architecture profile (`thumbv8m` in their target
4966name).
4967LLVM, the Rust compiler and the linker are providing
4968[support](https://developer.arm.com/documentation/ecm0359818/latest/) for the
4969TrustZone-M feature.
4970
4971One of the things provided with this unstable feature is the "cmse-nonsecure-entry" ABI.
4972This ABI marks a Secure function as an entry function (see
4973[section 5.4](https://developer.arm.com/documentation/ecm0359818/latest/) for details).
4974With this ABI, the compiler will do the following:
4975* add a special symbol on the function which is the `__acle_se_` prefix and the
4976  standard function name
4977* constrain the number of parameters to avoid using the Non-Secure stack
4978* before returning from the function, clear registers that might contain Secure
4979  information
4980* use the `BXNS` instruction to return
4981
4982Because the stack can not be used to pass parameters, there will be compilation
4983errors if:
4984* the total size of all parameters is too big (for example, more than four 32-bit integers)
4985
4986The special symbol `__acle_se_` will be used by the linker to generate a secure
4987gateway veneer.
4988
4989<!-- NOTE(ignore) this example is specific to thumbv8m targets -->
4990
4991``` rust,ignore
4992#![no_std]
4993#![feature(cmse_nonsecure_entry)]
4994
4995#[no_mangle]
4996pub extern "cmse-nonsecure-entry" fn entry_function(input: u32) -> u32 {
4997    input + 6
4998}
4999```
5000
5001``` text
5002$ rustc --emit obj --crate-type lib --target thumbv8m.main-none-eabi function.rs
5003$ arm-none-eabi-objdump -D function.o
5004
500500000000 <entry_function>:
5006   0:   b580            push    {r7, lr}
5007   2:   466f            mov     r7, sp
5008   4:   b082            sub     sp, #8
5009   6:   9001            str     r0, [sp, #4]
5010   8:   1d81            adds    r1, r0, #6
5011   a:   460a            mov     r2, r1
5012   c:   4281            cmp     r1, r0
5013   e:   9200            str     r2, [sp, #0]
5014  10:   d30b            bcc.n   2a <entry_function+0x2a>
5015  12:   e7ff            b.n     14 <entry_function+0x14>
5016  14:   9800            ldr     r0, [sp, #0]
5017  16:   b002            add     sp, #8
5018  18:   e8bd 4080       ldmia.w sp!, {r7, lr}
5019  1c:   4671            mov     r1, lr
5020  1e:   4672            mov     r2, lr
5021  20:   4673            mov     r3, lr
5022  22:   46f4            mov     ip, lr
5023  24:   f38e 8800       msr     CPSR_f, lr
5024  28:   4774            bxns    lr
5025  2a:   f240 0000       movw    r0, #0
5026  2e:   f2c0 0000       movt    r0, #0
5027  32:   f240 0200       movw    r2, #0
5028  36:   f2c0 0200       movt    r2, #0
5029  3a:   211c            movs    r1, #28
5030  3c:   f7ff fffe       bl      0 <_ZN4core9panicking5panic17h5c028258ca2fb3f5E>
5031  40:   defe            udf     #254    ; 0xfe
5032```
5033"##,
5034        default_severity: Severity::Allow,
5035        warn_since: None,
5036        deny_since: None,
5037    },
5038    Lint {
5039        label: "coerce_pointee_validated",
5040        description: r##"# `coerce_pointee_validated`
5041
5042
5043
5044This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
5045
5046------------------------
5047"##,
5048        default_severity: Severity::Allow,
5049        warn_since: None,
5050        deny_since: None,
5051    },
5052    Lint {
5053        label: "coerce_unsized",
5054        description: r##"# `coerce_unsized`
5055
5056
5057
5058The tracking issue for this feature is: [#18598]
5059
5060[#18598]: https://github.com/rust-lang/rust/issues/18598
5061
5062------------------------
5063"##,
5064        default_severity: Severity::Allow,
5065        warn_since: None,
5066        deny_since: None,
5067    },
5068    Lint {
5069        label: "command_resolved_envs",
5070        description: r##"# `command_resolved_envs`
5071
5072
5073
5074The tracking issue for this feature is: [#149070]
5075
5076[#149070]: https://github.com/rust-lang/rust/issues/149070
5077
5078------------------------
5079"##,
5080        default_severity: Severity::Allow,
5081        warn_since: None,
5082        deny_since: None,
5083    },
5084    Lint {
5085        label: "compiler_builtins",
5086        description: r##"# `compiler_builtins`
5087
5088This feature is internal to the Rust compiler and is not intended for general use.
5089
5090------------------------
5091"##,
5092        default_severity: Severity::Allow,
5093        warn_since: None,
5094        deny_since: None,
5095    },
5096    Lint {
5097        label: "concat_bytes",
5098        description: r##"# `concat_bytes`
5099
5100
5101
5102The tracking issue for this feature is: [#87555]
5103
5104[#87555]: https://github.com/rust-lang/rust/issues/87555
5105
5106------------------------
5107"##,
5108        default_severity: Severity::Allow,
5109        warn_since: None,
5110        deny_since: None,
5111    },
5112    Lint {
5113        label: "const_alloc_error",
5114        description: r##"# `const_alloc_error`
5115
5116
5117
5118The tracking issue for this feature is: [#92523]
5119
5120[#92523]: https://github.com/rust-lang/rust/issues/92523
5121
5122------------------------
5123"##,
5124        default_severity: Severity::Allow,
5125        warn_since: None,
5126        deny_since: None,
5127    },
5128    Lint {
5129        label: "const_array",
5130        description: r##"# `const_array`
5131
5132
5133
5134The tracking issue for this feature is: [#147606]
5135
5136[#147606]: https://github.com/rust-lang/rust/issues/147606
5137
5138------------------------
5139"##,
5140        default_severity: Severity::Allow,
5141        warn_since: None,
5142        deny_since: None,
5143    },
5144    Lint {
5145        label: "const_async_blocks",
5146        description: r##"# `const_async_blocks`
5147
5148Allows `async {}` expressions in const contexts.
5149
5150The tracking issue for this feature is: [#85368]
5151
5152[#85368]: https://github.com/rust-lang/rust/issues/85368
5153
5154------------------------
5155"##,
5156        default_severity: Severity::Allow,
5157        warn_since: None,
5158        deny_since: None,
5159    },
5160    Lint {
5161        label: "const_block_items",
5162        description: r##"# `const_block_items`
5163
5164Allows `const { ... }` as a shorthand for `const _: () = const { ... };` for module items.
5165
5166The tracking issue for this feature is: [#149226]
5167
5168[#149226]: https://github.com/rust-lang/rust/issues/149226
5169
5170------------------------
5171"##,
5172        default_severity: Severity::Allow,
5173        warn_since: None,
5174        deny_since: None,
5175    },
5176    Lint {
5177        label: "const_bool",
5178        description: r##"# `const_bool`
5179
5180
5181
5182The tracking issue for this feature is: [#151531]
5183
5184[#151531]: https://github.com/rust-lang/rust/issues/151531
5185
5186------------------------
5187"##,
5188        default_severity: Severity::Allow,
5189        warn_since: None,
5190        deny_since: None,
5191    },
5192    Lint {
5193        label: "const_btree_len",
5194        description: r##"# `const_btree_len`
5195
5196
5197
5198This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
5199
5200------------------------
5201"##,
5202        default_severity: Severity::Allow,
5203        warn_since: None,
5204        deny_since: None,
5205    },
5206    Lint {
5207        label: "const_c_variadic",
5208        description: r##"# `const_c_variadic`
5209
5210Allows defining and calling c-variadic functions in const contexts.
5211
5212The tracking issue for this feature is: [#151787]
5213
5214[#151787]: https://github.com/rust-lang/rust/issues/151787
5215
5216------------------------
5217"##,
5218        default_severity: Severity::Allow,
5219        warn_since: None,
5220        deny_since: None,
5221    },
5222    Lint {
5223        label: "const_carrying_mul_add",
5224        description: r##"# `const_carrying_mul_add`
5225
5226
5227
5228The tracking issue for this feature is: [#85532]
5229
5230[#85532]: https://github.com/rust-lang/rust/issues/85532
5231
5232------------------------
5233"##,
5234        default_severity: Severity::Allow,
5235        warn_since: None,
5236        deny_since: None,
5237    },
5238    Lint {
5239        label: "const_cell_traits",
5240        description: r##"# `const_cell_traits`
5241
5242
5243
5244The tracking issue for this feature is: [#147787]
5245
5246[#147787]: https://github.com/rust-lang/rust/issues/147787
5247
5248------------------------
5249"##,
5250        default_severity: Severity::Allow,
5251        warn_since: None,
5252        deny_since: None,
5253    },
5254    Lint {
5255        label: "const_clone",
5256        description: r##"# `const_clone`
5257
5258
5259
5260The tracking issue for this feature is: [#142757]
5261
5262[#142757]: https://github.com/rust-lang/rust/issues/142757
5263
5264------------------------
5265"##,
5266        default_severity: Severity::Allow,
5267        warn_since: None,
5268        deny_since: None,
5269    },
5270    Lint {
5271        label: "const_closures",
5272        description: r##"# `const_closures`
5273
5274Allows `const || {}` closures in const contexts.
5275
5276The tracking issue for this feature is: [#106003]
5277
5278[#106003]: https://github.com/rust-lang/rust/issues/106003
5279
5280------------------------
5281"##,
5282        default_severity: Severity::Allow,
5283        warn_since: None,
5284        deny_since: None,
5285    },
5286    Lint {
5287        label: "const_cmp",
5288        description: r##"# `const_cmp`
5289
5290
5291
5292The tracking issue for this feature is: [#143800]
5293
5294[#143800]: https://github.com/rust-lang/rust/issues/143800
5295
5296------------------------
5297"##,
5298        default_severity: Severity::Allow,
5299        warn_since: None,
5300        deny_since: None,
5301    },
5302    Lint {
5303        label: "const_control_flow",
5304        description: r##"# `const_control_flow`
5305
5306
5307
5308The tracking issue for this feature is: [#148739]
5309
5310[#148739]: https://github.com/rust-lang/rust/issues/148739
5311
5312------------------------
5313"##,
5314        default_severity: Severity::Allow,
5315        warn_since: None,
5316        deny_since: None,
5317    },
5318    Lint {
5319        label: "const_convert",
5320        description: r##"# `const_convert`
5321
5322
5323
5324The tracking issue for this feature is: [#143773]
5325
5326[#143773]: https://github.com/rust-lang/rust/issues/143773
5327
5328------------------------
5329"##,
5330        default_severity: Severity::Allow,
5331        warn_since: None,
5332        deny_since: None,
5333    },
5334    Lint {
5335        label: "const_default",
5336        description: r##"# `const_default`
5337
5338
5339
5340The tracking issue for this feature is: [#143894]
5341
5342[#143894]: https://github.com/rust-lang/rust/issues/143894
5343
5344------------------------
5345"##,
5346        default_severity: Severity::Allow,
5347        warn_since: None,
5348        deny_since: None,
5349    },
5350    Lint {
5351        label: "const_destruct",
5352        description: r##"# `const_destruct`
5353
5354Allows using `[const] Destruct` bounds and calling drop impls in const contexts.
5355
5356The tracking issue for this feature is: [#133214]
5357
5358[#133214]: https://github.com/rust-lang/rust/issues/133214
5359
5360------------------------
5361"##,
5362        default_severity: Severity::Allow,
5363        warn_since: None,
5364        deny_since: None,
5365    },
5366    Lint {
5367        label: "const_drop_guard",
5368        description: r##"# `const_drop_guard`
5369
5370
5371
5372This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
5373
5374------------------------
5375"##,
5376        default_severity: Severity::Allow,
5377        warn_since: None,
5378        deny_since: None,
5379    },
5380    Lint {
5381        label: "const_drop_in_place",
5382        description: r##"# `const_drop_in_place`
5383
5384
5385
5386The tracking issue for this feature is: [#109342]
5387
5388[#109342]: https://github.com/rust-lang/rust/issues/109342
5389
5390------------------------
5391"##,
5392        default_severity: Severity::Allow,
5393        warn_since: None,
5394        deny_since: None,
5395    },
5396    Lint {
5397        label: "const_eval_select",
5398        description: r##"# `const_eval_select`
5399
5400
5401
5402The tracking issue for this feature is: [#124625]
5403
5404[#124625]: https://github.com/rust-lang/rust/issues/124625
5405
5406------------------------
5407"##,
5408        default_severity: Severity::Allow,
5409        warn_since: None,
5410        deny_since: None,
5411    },
5412    Lint {
5413        label: "const_for",
5414        description: r##"# `const_for`
5415
5416Allows `for _ in _` loops in const contexts.
5417
5418The tracking issue for this feature is: [#87575]
5419
5420[#87575]: https://github.com/rust-lang/rust/issues/87575
5421
5422------------------------
5423"##,
5424        default_severity: Severity::Allow,
5425        warn_since: None,
5426        deny_since: None,
5427    },
5428    Lint {
5429        label: "const_format_args",
5430        description: r##"# `const_format_args`
5431
5432
5433
5434This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
5435
5436------------------------
5437"##,
5438        default_severity: Severity::Allow,
5439        warn_since: None,
5440        deny_since: None,
5441    },
5442    Lint {
5443        label: "const_heap",
5444        description: r##"# `const_heap`
5445
5446
5447
5448The tracking issue for this feature is: [#79597]
5449
5450[#79597]: https://github.com/rust-lang/rust/issues/79597
5451
5452------------------------
5453"##,
5454        default_severity: Severity::Allow,
5455        warn_since: None,
5456        deny_since: None,
5457    },
5458    Lint {
5459        label: "const_index",
5460        description: r##"# `const_index`
5461
5462
5463
5464The tracking issue for this feature is: [#143775]
5465
5466[#143775]: https://github.com/rust-lang/rust/issues/143775
5467
5468------------------------
5469"##,
5470        default_severity: Severity::Allow,
5471        warn_since: None,
5472        deny_since: None,
5473    },
5474    Lint {
5475        label: "const_iter",
5476        description: r##"# `const_iter`
5477
5478
5479
5480The tracking issue for this feature is: [#92476]
5481
5482[#92476]: https://github.com/rust-lang/rust/issues/92476
5483
5484------------------------
5485"##,
5486        default_severity: Severity::Allow,
5487        warn_since: None,
5488        deny_since: None,
5489    },
5490    Lint {
5491        label: "const_manually_drop_take",
5492        description: r##"# `const_manually_drop_take`
5493
5494
5495
5496The tracking issue for this feature is: [#148773]
5497
5498[#148773]: https://github.com/rust-lang/rust/issues/148773
5499
5500------------------------
5501"##,
5502        default_severity: Severity::Allow,
5503        warn_since: None,
5504        deny_since: None,
5505    },
5506    Lint {
5507        label: "const_never_short_circuit",
5508        description: r##"# `const_never_short_circuit`
5509
5510
5511
5512This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
5513
5514------------------------
5515"##,
5516        default_severity: Severity::Allow,
5517        warn_since: None,
5518        deny_since: None,
5519    },
5520    Lint {
5521        label: "const_nonnull_with_exposed_provenance",
5522        description: r##"# `const_nonnull_with_exposed_provenance`
5523
5524
5525
5526The tracking issue for this feature is: [#154215]
5527
5528[#154215]: https://github.com/rust-lang/rust/issues/154215
5529
5530------------------------
5531"##,
5532        default_severity: Severity::Allow,
5533        warn_since: None,
5534        deny_since: None,
5535    },
5536    Lint {
5537        label: "const_ops",
5538        description: r##"# `const_ops`
5539
5540
5541
5542The tracking issue for this feature is: [#143802]
5543
5544[#143802]: https://github.com/rust-lang/rust/issues/143802
5545
5546------------------------
5547"##,
5548        default_severity: Severity::Allow,
5549        warn_since: None,
5550        deny_since: None,
5551    },
5552    Lint {
5553        label: "const_option_ops",
5554        description: r##"# `const_option_ops`
5555
5556
5557
5558The tracking issue for this feature is: [#143956]
5559
5560[#143956]: https://github.com/rust-lang/rust/issues/143956
5561
5562------------------------
5563"##,
5564        default_severity: Severity::Allow,
5565        warn_since: None,
5566        deny_since: None,
5567    },
5568    Lint {
5569        label: "const_param_ty_trait",
5570        description: r##"# `const_param_ty_trait`
5571
5572
5573
5574The tracking issue for this feature is: [#95174]
5575
5576[#95174]: https://github.com/rust-lang/rust/issues/95174
5577
5578------------------------
5579"##,
5580        default_severity: Severity::Allow,
5581        warn_since: None,
5582        deny_since: None,
5583    },
5584    Lint {
5585        label: "const_param_ty_unchecked",
5586        description: r##"# `const_param_ty_unchecked`
5587
5588Allows skipping `ConstParamTy_` trait implementation checks
5589
5590This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
5591
5592------------------------
5593"##,
5594        default_severity: Severity::Allow,
5595        warn_since: None,
5596        deny_since: None,
5597    },
5598    Lint {
5599        label: "const_path_separators",
5600        description: r##"# `const_path_separators`
5601
5602
5603
5604The tracking issue for this feature is: [#153106]
5605
5606[#153106]: https://github.com/rust-lang/rust/issues/153106
5607
5608------------------------
5609"##,
5610        default_severity: Severity::Allow,
5611        warn_since: None,
5612        deny_since: None,
5613    },
5614    Lint {
5615        label: "const_precise_live_drops",
5616        description: r##"# `const_precise_live_drops`
5617
5618Be more precise when looking for live drops in a const context.
5619
5620The tracking issue for this feature is: [#73255]
5621
5622[#73255]: https://github.com/rust-lang/rust/issues/73255
5623
5624------------------------
5625"##,
5626        default_severity: Severity::Allow,
5627        warn_since: None,
5628        deny_since: None,
5629    },
5630    Lint {
5631        label: "const_range",
5632        description: r##"# `const_range`
5633
5634
5635
5636This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
5637
5638------------------------
5639"##,
5640        default_severity: Severity::Allow,
5641        warn_since: None,
5642        deny_since: None,
5643    },
5644    Lint {
5645        label: "const_range_bounds",
5646        description: r##"# `const_range_bounds`
5647
5648
5649
5650The tracking issue for this feature is: [#108082]
5651
5652[#108082]: https://github.com/rust-lang/rust/issues/108082
5653
5654------------------------
5655"##,
5656        default_severity: Severity::Allow,
5657        warn_since: None,
5658        deny_since: None,
5659    },
5660    Lint {
5661        label: "const_raw_ptr_comparison",
5662        description: r##"# `const_raw_ptr_comparison`
5663
5664
5665
5666The tracking issue for this feature is: [#53020]
5667
5668[#53020]: https://github.com/rust-lang/rust/issues/53020
5669
5670------------------------
5671"##,
5672        default_severity: Severity::Allow,
5673        warn_since: None,
5674        deny_since: None,
5675    },
5676    Lint {
5677        label: "const_ref_cell",
5678        description: r##"# `const_ref_cell`
5679
5680
5681
5682The tracking issue for this feature is: [#137844]
5683
5684[#137844]: https://github.com/rust-lang/rust/issues/137844
5685
5686------------------------
5687"##,
5688        default_severity: Severity::Allow,
5689        warn_since: None,
5690        deny_since: None,
5691    },
5692    Lint {
5693        label: "const_result_trait_fn",
5694        description: r##"# `const_result_trait_fn`
5695
5696
5697
5698The tracking issue for this feature is: [#144211]
5699
5700[#144211]: https://github.com/rust-lang/rust/issues/144211
5701
5702------------------------
5703"##,
5704        default_severity: Severity::Allow,
5705        warn_since: None,
5706        deny_since: None,
5707    },
5708    Lint {
5709        label: "const_result_unwrap_unchecked",
5710        description: r##"# `const_result_unwrap_unchecked`
5711
5712
5713
5714The tracking issue for this feature is: [#148714]
5715
5716[#148714]: https://github.com/rust-lang/rust/issues/148714
5717
5718------------------------
5719"##,
5720        default_severity: Severity::Allow,
5721        warn_since: None,
5722        deny_since: None,
5723    },
5724    Lint {
5725        label: "const_select_unpredictable",
5726        description: r##"# `const_select_unpredictable`
5727
5728
5729
5730The tracking issue for this feature is: [#145938]
5731
5732[#145938]: https://github.com/rust-lang/rust/issues/145938
5733
5734------------------------
5735"##,
5736        default_severity: Severity::Allow,
5737        warn_since: None,
5738        deny_since: None,
5739    },
5740    Lint {
5741        label: "const_slice_from_mut_ptr_range",
5742        description: r##"# `const_slice_from_mut_ptr_range`
5743
5744
5745
5746The tracking issue for this feature is: [#89792]
5747
5748[#89792]: https://github.com/rust-lang/rust/issues/89792
5749
5750------------------------
5751"##,
5752        default_severity: Severity::Allow,
5753        warn_since: None,
5754        deny_since: None,
5755    },
5756    Lint {
5757        label: "const_slice_from_ptr_range",
5758        description: r##"# `const_slice_from_ptr_range`
5759
5760
5761
5762The tracking issue for this feature is: [#89792]
5763
5764[#89792]: https://github.com/rust-lang/rust/issues/89792
5765
5766------------------------
5767"##,
5768        default_severity: Severity::Allow,
5769        warn_since: None,
5770        deny_since: None,
5771    },
5772    Lint {
5773        label: "const_slice_make_iter",
5774        description: r##"# `const_slice_make_iter`
5775
5776
5777
5778The tracking issue for this feature is: [#137737]
5779
5780[#137737]: https://github.com/rust-lang/rust/issues/137737
5781
5782------------------------
5783"##,
5784        default_severity: Severity::Allow,
5785        warn_since: None,
5786        deny_since: None,
5787    },
5788    Lint {
5789        label: "const_split_off_first_last",
5790        description: r##"# `const_split_off_first_last`
5791
5792
5793
5794The tracking issue for this feature is: [#138539]
5795
5796[#138539]: https://github.com/rust-lang/rust/issues/138539
5797
5798------------------------
5799"##,
5800        default_severity: Severity::Allow,
5801        warn_since: None,
5802        deny_since: None,
5803    },
5804    Lint {
5805        label: "const_swap_with_slice",
5806        description: r##"# `const_swap_with_slice`
5807
5808
5809
5810The tracking issue for this feature is: [#142204]
5811
5812[#142204]: https://github.com/rust-lang/rust/issues/142204
5813
5814------------------------
5815"##,
5816        default_severity: Severity::Allow,
5817        warn_since: None,
5818        deny_since: None,
5819    },
5820    Lint {
5821        label: "const_trait_impl",
5822        description: r##"# `const_trait_impl`
5823
5824Allows `impl const Trait for T` syntax.
5825
5826The tracking issue for this feature is: [#143874]
5827
5828[#143874]: https://github.com/rust-lang/rust/issues/143874
5829
5830------------------------
5831"##,
5832        default_severity: Severity::Allow,
5833        warn_since: None,
5834        deny_since: None,
5835    },
5836    Lint {
5837        label: "const_try",
5838        description: r##"# `const_try`
5839
5840Allows the `?` operator in const contexts.
5841
5842The tracking issue for this feature is: [#74935]
5843
5844[#74935]: https://github.com/rust-lang/rust/issues/74935
5845
5846------------------------
5847"##,
5848        default_severity: Severity::Allow,
5849        warn_since: None,
5850        deny_since: None,
5851    },
5852    Lint {
5853        label: "const_try_residual",
5854        description: r##"# `const_try_residual`
5855
5856
5857
5858The tracking issue for this feature is: [#91285]
5859
5860[#91285]: https://github.com/rust-lang/rust/issues/91285
5861
5862------------------------
5863"##,
5864        default_severity: Severity::Allow,
5865        warn_since: None,
5866        deny_since: None,
5867    },
5868    Lint {
5869        label: "const_type_name",
5870        description: r##"# `const_type_name`
5871
5872
5873
5874The tracking issue for this feature is: [#63084]
5875
5876[#63084]: https://github.com/rust-lang/rust/issues/63084
5877
5878------------------------
5879"##,
5880        default_severity: Severity::Allow,
5881        warn_since: None,
5882        deny_since: None,
5883    },
5884    Lint {
5885        label: "const_unsigned_bigint_helpers",
5886        description: r##"# `const_unsigned_bigint_helpers`
5887
5888
5889
5890The tracking issue for this feature is: [#152015]
5891
5892[#152015]: https://github.com/rust-lang/rust/issues/152015
5893
5894------------------------
5895"##,
5896        default_severity: Severity::Allow,
5897        warn_since: None,
5898        deny_since: None,
5899    },
5900    Lint {
5901        label: "container_error_extra",
5902        description: r##"# `container_error_extra`
5903
5904
5905
5906This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
5907
5908------------------------
5909"##,
5910        default_severity: Severity::Allow,
5911        warn_since: None,
5912        deny_since: None,
5913    },
5914    Lint {
5915        label: "context_ext",
5916        description: r##"# `context_ext`
5917
5918
5919
5920The tracking issue for this feature is: [#123392]
5921
5922[#123392]: https://github.com/rust-lang/rust/issues/123392
5923
5924------------------------
5925"##,
5926        default_severity: Severity::Allow,
5927        warn_since: None,
5928        deny_since: None,
5929    },
5930    Lint {
5931        label: "contracts",
5932        description: r##"# `contracts`
5933
5934Allows use of contracts attributes.
5935
5936The tracking issue for this feature is: [#128044]
5937
5938[#128044]: https://github.com/rust-lang/rust/issues/128044
5939
5940------------------------
5941"##,
5942        default_severity: Severity::Allow,
5943        warn_since: None,
5944        deny_since: None,
5945    },
5946    Lint {
5947        label: "contracts_internals",
5948        description: r##"# `contracts_internals`
5949
5950Allows access to internal machinery used to implement contracts.
5951
5952The tracking issue for this feature is: [#128044]
5953
5954[#128044]: https://github.com/rust-lang/rust/issues/128044
5955
5956------------------------
5957"##,
5958        default_severity: Severity::Allow,
5959        warn_since: None,
5960        deny_since: None,
5961    },
5962    Lint {
5963        label: "control_flow_into_value",
5964        description: r##"# `control_flow_into_value`
5965
5966
5967
5968The tracking issue for this feature is: [#137461]
5969
5970[#137461]: https://github.com/rust-lang/rust/issues/137461
5971
5972------------------------
5973"##,
5974        default_severity: Severity::Allow,
5975        warn_since: None,
5976        deny_since: None,
5977    },
5978    Lint {
5979        label: "convert_float_to_int",
5980        description: r##"# `convert_float_to_int`
5981
5982
5983
5984The tracking issue for this feature is: [#67057]
5985
5986[#67057]: https://github.com/rust-lang/rust/issues/67057
5987
5988------------------------
5989"##,
5990        default_severity: Severity::Allow,
5991        warn_since: None,
5992        deny_since: None,
5993    },
5994    Lint {
5995        label: "copied_into_inner",
5996        description: r##"# `copied_into_inner`
5997
5998
5999
6000This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
6001
6002------------------------
6003"##,
6004        default_severity: Severity::Allow,
6005        warn_since: None,
6006        deny_since: None,
6007    },
6008    Lint {
6009        label: "core_float_math",
6010        description: r##"# `core_float_math`
6011
6012
6013
6014The tracking issue for this feature is: [#137578]
6015
6016[#137578]: https://github.com/rust-lang/rust/issues/137578
6017
6018------------------------
6019"##,
6020        default_severity: Severity::Allow,
6021        warn_since: None,
6022        deny_since: None,
6023    },
6024    Lint {
6025        label: "core_intrinsics",
6026        description: r##"# `core_intrinsics`
6027
6028This feature is internal to the Rust compiler and is not intended for general use.
6029
6030------------------------
6031"##,
6032        default_severity: Severity::Allow,
6033        warn_since: None,
6034        deny_since: None,
6035    },
6036    Lint {
6037        label: "core_intrinsics_fallbacks",
6038        description: r##"# `core_intrinsics_fallbacks`
6039
6040
6041
6042This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
6043
6044------------------------
6045"##,
6046        default_severity: Severity::Allow,
6047        warn_since: None,
6048        deny_since: None,
6049    },
6050    Lint {
6051        label: "core_io",
6052        description: r##"# `core_io`
6053
6054
6055
6056The tracking issue for this feature is: [#154046]
6057
6058[#154046]: https://github.com/rust-lang/rust/issues/154046
6059
6060------------------------
6061"##,
6062        default_severity: Severity::Allow,
6063        warn_since: None,
6064        deny_since: None,
6065    },
6066    Lint {
6067        label: "core_io_borrowed_buf",
6068        description: r##"# `core_io_borrowed_buf`
6069
6070
6071
6072The tracking issue for this feature is: [#117693]
6073
6074[#117693]: https://github.com/rust-lang/rust/issues/117693
6075
6076------------------------
6077"##,
6078        default_severity: Severity::Allow,
6079        warn_since: None,
6080        deny_since: None,
6081    },
6082    Lint {
6083        label: "core_io_internals",
6084        description: r##"# `core_io_internals`
6085
6086
6087
6088This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
6089
6090------------------------
6091"##,
6092        default_severity: Severity::Allow,
6093        warn_since: None,
6094        deny_since: None,
6095    },
6096    Lint {
6097        label: "core_private_bignum",
6098        description: r##"# `core_private_bignum`
6099
6100This feature is internal to the Rust compiler and is not intended for general use.
6101
6102------------------------
6103"##,
6104        default_severity: Severity::Allow,
6105        warn_since: None,
6106        deny_since: None,
6107    },
6108    Lint {
6109        label: "core_private_diy_float",
6110        description: r##"# `core_private_diy_float`
6111
6112This feature is internal to the Rust compiler and is not intended for general use.
6113
6114------------------------
6115"##,
6116        default_severity: Severity::Allow,
6117        warn_since: None,
6118        deny_since: None,
6119    },
6120    Lint {
6121        label: "coroutine_clone",
6122        description: r##"# `coroutine_clone`
6123
6124Allows coroutines to be cloned.
6125
6126The tracking issue for this feature is: [#95360]
6127
6128[#95360]: https://github.com/rust-lang/rust/issues/95360
6129
6130------------------------
6131"##,
6132        default_severity: Severity::Allow,
6133        warn_since: None,
6134        deny_since: None,
6135    },
6136    Lint {
6137        label: "coroutine_trait",
6138        description: r##"# `coroutine_trait`
6139
6140
6141
6142The tracking issue for this feature is: [#43122]
6143
6144[#43122]: https://github.com/rust-lang/rust/issues/43122
6145
6146------------------------
6147"##,
6148        default_severity: Severity::Allow,
6149        warn_since: None,
6150        deny_since: None,
6151    },
6152    Lint {
6153        label: "coroutines",
6154        description: r##"# `coroutines`
6155
6156The tracking issue for this feature is: [#43122]
6157
6158[#43122]: https://github.com/rust-lang/rust/issues/43122
6159
6160------------------------
6161
6162The `coroutines` feature gate in Rust allows you to define coroutine or
6163coroutine literals. A coroutine is a "resumable function" that syntactically
6164resembles a closure but compiles to much different semantics in the compiler
6165itself. The primary feature of a coroutine is that it can be suspended during
6166execution to be resumed at a later date. Coroutines use the `yield` keyword to
6167"return", and then the caller can `resume` a coroutine to resume execution just
6168after the `yield` keyword.
6169
6170Coroutines are an extra-unstable feature in the compiler right now. Added in
6171[RFC 2033] they're mostly intended right now as a information/constraint
6172gathering phase. The intent is that experimentation can happen on the nightly
6173compiler before actual stabilization. A further RFC will be required to
6174stabilize coroutines and will likely contain at least a few small
6175tweaks to the overall design.
6176
6177[RFC 2033]: https://github.com/rust-lang/rfcs/pull/2033
6178
6179A syntactical example of a coroutine is:
6180
6181```rust
6182#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
6183
6184use std::ops::{Coroutine, CoroutineState};
6185use std::pin::Pin;
6186
6187fn main() {
6188    let mut coroutine = #[coroutine] || {
6189        yield 1;
6190        return "foo"
6191    };
6192
6193    match Pin::new(&mut coroutine).resume(()) {
6194        CoroutineState::Yielded(1) => {}
6195        _ => panic!("unexpected value from resume"),
6196    }
6197    match Pin::new(&mut coroutine).resume(()) {
6198        CoroutineState::Complete("foo") => {}
6199        _ => panic!("unexpected value from resume"),
6200    }
6201}
6202```
6203
6204Coroutines are closure-like literals which are annotated with `#[coroutine]`
6205and can contain a `yield` statement. The
6206`yield` statement takes an optional expression of a value to yield out of the
6207coroutine. All coroutine literals implement the `Coroutine` trait in the
6208`std::ops` module. The `Coroutine` trait has one main method, `resume`, which
6209resumes execution of the coroutine at the previous suspension point.
6210
6211An example of the control flow of coroutines is that the following example
6212prints all numbers in order:
6213
6214```rust
6215#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
6216
6217use std::ops::Coroutine;
6218use std::pin::Pin;
6219
6220fn main() {
6221    let mut coroutine = #[coroutine] || {
6222        println!("2");
6223        yield;
6224        println!("4");
6225    };
6226
6227    println!("1");
6228    Pin::new(&mut coroutine).resume(());
6229    println!("3");
6230    Pin::new(&mut coroutine).resume(());
6231    println!("5");
6232}
6233```
6234
6235At this time the main use case of coroutines is an implementation
6236primitive for `async`/`await` and `gen` syntax, but coroutines
6237will likely be extended to other primitives in the future.
6238Feedback on the design and usage is always appreciated!
6239
6240### The `Coroutine` trait
6241
6242The `Coroutine` trait in `std::ops` currently looks like:
6243
6244```rust
6245# #![feature(arbitrary_self_types, coroutine_trait)]
6246# use std::ops::CoroutineState;
6247# use std::pin::Pin;
6248
6249pub trait Coroutine<R = ()> {
6250    type Yield;
6251    type Return;
6252    fn resume(self: Pin<&mut Self>, resume: R) -> CoroutineState<Self::Yield, Self::Return>;
6253}
6254```
6255
6256The `Coroutine::Yield` type is the type of values that can be yielded with the
6257`yield` statement. The `Coroutine::Return` type is the returned type of the
6258coroutine. This is typically the last expression in a coroutine's definition or
6259any value passed to `return` in a coroutine. The `resume` function is the entry
6260point for executing the `Coroutine` itself.
6261
6262The return value of `resume`, `CoroutineState`, looks like:
6263
6264```rust
6265pub enum CoroutineState<Y, R> {
6266    Yielded(Y),
6267    Complete(R),
6268}
6269```
6270
6271The `Yielded` variant indicates that the coroutine can later be resumed. This
6272corresponds to a `yield` point in a coroutine. The `Complete` variant indicates
6273that the coroutine is complete and cannot be resumed again. Calling `resume`
6274after a coroutine has returned `Complete` will likely result in a panic of the
6275program.
6276
6277### Closure-like semantics
6278
6279The closure-like syntax for coroutines alludes to the fact that they also have
6280closure-like semantics. Namely:
6281
6282* When created, a coroutine executes no code. A closure literal does not
6283  actually execute any of the closure's code on construction, and similarly a
6284  coroutine literal does not execute any code inside the coroutine when
6285  constructed.
6286
6287* Coroutines can capture outer variables by reference or by move, and this can
6288  be tweaked with the `move` keyword at the beginning of the closure. Like
6289  closures all coroutines will have an implicit environment which is inferred by
6290  the compiler. Outer variables can be moved into a coroutine for use as the
6291  coroutine progresses.
6292
6293* Coroutine literals produce a value with a unique type which implements the
6294  `std::ops::Coroutine` trait. This allows actual execution of the coroutine
6295  through the `Coroutine::resume` method as well as also naming it in return
6296  types and such.
6297
6298* Traits like `Send` and `Sync` are automatically implemented for a `Coroutine`
6299  depending on the captured variables of the environment. Unlike closures,
6300  coroutines also depend on variables live across suspension points. This means
6301  that although the ambient environment may be `Send` or `Sync`, the coroutine
6302  itself may not be due to internal variables live across `yield` points being
6303  not-`Send` or not-`Sync`. Note that coroutines do
6304  not implement traits like `Copy` or `Clone` automatically.
6305
6306* Whenever a coroutine is dropped it will drop all captured environment
6307  variables.
6308
6309### Coroutines as state machines
6310
6311In the compiler, coroutines are currently compiled as state machines. Each
6312`yield` expression will correspond to a different state that stores all live
6313variables over that suspension point. Resumption of a coroutine will dispatch on
6314the current state and then execute internally until a `yield` is reached, at
6315which point all state is saved off in the coroutine and a value is returned.
6316
6317Let's take a look at an example to see what's going on here:
6318
6319```rust
6320#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
6321
6322use std::ops::Coroutine;
6323use std::pin::Pin;
6324
6325fn main() {
6326    let ret = "foo";
6327    let mut coroutine = #[coroutine] move || {
6328        yield 1;
6329        return ret
6330    };
6331
6332    Pin::new(&mut coroutine).resume(());
6333    Pin::new(&mut coroutine).resume(());
6334}
6335```
6336
6337This coroutine literal will compile down to something similar to:
6338
6339```rust
6340#![feature(arbitrary_self_types, coroutine_trait)]
6341
6342use std::ops::{Coroutine, CoroutineState};
6343use std::pin::Pin;
6344
6345fn main() {
6346    let ret = "foo";
6347    let mut coroutine = {
6348        enum __Coroutine {
6349            Start(&'static str),
6350            Yield1(&'static str),
6351            Done,
6352        }
6353
6354        impl Coroutine for __Coroutine {
6355            type Yield = i32;
6356            type Return = &'static str;
6357
6358            fn resume(mut self: Pin<&mut Self>, resume: ()) -> CoroutineState<i32, &'static str> {
6359                use std::mem;
6360                match mem::replace(&mut *self, __Coroutine::Done) {
6361                    __Coroutine::Start(s) => {
6362                        *self = __Coroutine::Yield1(s);
6363                        CoroutineState::Yielded(1)
6364                    }
6365
6366                    __Coroutine::Yield1(s) => {
6367                        *self = __Coroutine::Done;
6368                        CoroutineState::Complete(s)
6369                    }
6370
6371                    __Coroutine::Done => {
6372                        panic!("coroutine resumed after completion")
6373                    }
6374                }
6375            }
6376        }
6377
6378        __Coroutine::Start(ret)
6379    };
6380
6381    Pin::new(&mut coroutine).resume(());
6382    Pin::new(&mut coroutine).resume(());
6383}
6384```
6385
6386Notably here we can see that the compiler is generating a fresh type,
6387`__Coroutine` in this case. This type has a number of states (represented here
6388as an `enum`) corresponding to each of the conceptual states of the coroutine.
6389At the beginning we're closing over our outer variable `foo` and then that
6390variable is also live over the `yield` point, so it's stored in both states.
6391
6392When the coroutine starts it'll immediately yield 1, but it saves off its state
6393just before it does so indicating that it has reached the yield point. Upon
6394resuming again we'll execute the `return ret` which returns the `Complete`
6395state.
6396
6397Here we can also note that the `Done` state, if resumed, panics immediately as
6398it's invalid to resume a completed coroutine. It's also worth noting that this
6399is just a rough desugaring, not a normative specification for what the compiler
6400does.
6401"##,
6402        default_severity: Severity::Allow,
6403        warn_since: None,
6404        deny_since: None,
6405    },
6406    Lint {
6407        label: "coverage_attribute",
6408        description: r##"# `coverage_attribute`
6409
6410The tracking issue for this feature is: [#84605]
6411
6412[#84605]: https://github.com/rust-lang/rust/issues/84605
6413
6414---
6415
6416The `coverage` attribute can be used to selectively disable coverage
6417instrumentation in an annotated function. This might be useful to:
6418
6419-   Avoid instrumentation overhead in a performance critical function
6420-   Avoid generating coverage for a function that is not meant to be executed,
6421    but still target 100% coverage for the rest of the program.
6422
6423## Example
6424
6425```rust
6426#![feature(coverage_attribute)]
6427
6428// `foo()` will get coverage instrumentation (by default)
6429fn foo() {
6430  // ...
6431}
6432
6433#[coverage(off)]
6434fn bar() {
6435  // ...
6436}
6437```
6438"##,
6439        default_severity: Severity::Allow,
6440        warn_since: None,
6441        deny_since: None,
6442    },
6443    Lint {
6444        label: "cow_is_borrowed",
6445        description: r##"# `cow_is_borrowed`
6446
6447
6448
6449The tracking issue for this feature is: [#65143]
6450
6451[#65143]: https://github.com/rust-lang/rust/issues/65143
6452
6453------------------------
6454"##,
6455        default_severity: Severity::Allow,
6456        warn_since: None,
6457        deny_since: None,
6458    },
6459    Lint {
6460        label: "csky_target_feature",
6461        description: r##"# `csky_target_feature`
6462
6463Target features on csky.
6464
6465The tracking issue for this feature is: [#150248]
6466
6467[#150248]: https://github.com/rust-lang/rust/issues/150248
6468
6469------------------------
6470"##,
6471        default_severity: Severity::Allow,
6472        warn_since: None,
6473        deny_since: None,
6474    },
6475    Lint {
6476        label: "cstr_bytes",
6477        description: r##"# `cstr_bytes`
6478
6479
6480
6481The tracking issue for this feature is: [#112115]
6482
6483[#112115]: https://github.com/rust-lang/rust/issues/112115
6484
6485------------------------
6486"##,
6487        default_severity: Severity::Allow,
6488        warn_since: None,
6489        deny_since: None,
6490    },
6491    Lint {
6492        label: "cstr_display",
6493        description: r##"# `cstr_display`
6494
6495
6496
6497The tracking issue for this feature is: [#139984]
6498
6499[#139984]: https://github.com/rust-lang/rust/issues/139984
6500
6501------------------------
6502"##,
6503        default_severity: Severity::Allow,
6504        warn_since: None,
6505        deny_since: None,
6506    },
6507    Lint {
6508        label: "cstr_internals",
6509        description: r##"# `cstr_internals`
6510
6511
6512
6513This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
6514
6515------------------------
6516"##,
6517        default_severity: Severity::Allow,
6518        warn_since: None,
6519        deny_since: None,
6520    },
6521    Lint {
6522        label: "current_thread_id",
6523        description: r##"# `current_thread_id`
6524
6525
6526
6527The tracking issue for this feature is: [#147194]
6528
6529[#147194]: https://github.com/rust-lang/rust/issues/147194
6530
6531------------------------
6532"##,
6533        default_severity: Severity::Allow,
6534        warn_since: None,
6535        deny_since: None,
6536    },
6537    Lint {
6538        label: "cursor_split",
6539        description: r##"# `cursor_split`
6540
6541
6542
6543The tracking issue for this feature is: [#86369]
6544
6545[#86369]: https://github.com/rust-lang/rust/issues/86369
6546
6547------------------------
6548"##,
6549        default_severity: Severity::Allow,
6550        warn_since: None,
6551        deny_since: None,
6552    },
6553    Lint {
6554        label: "custom_inner_attributes",
6555        description: r##"# `custom_inner_attributes`
6556
6557Allows non-builtin attributes in inner attribute position.
6558
6559The tracking issue for this feature is: [#54726]
6560
6561[#54726]: https://github.com/rust-lang/rust/issues/54726
6562
6563------------------------
6564"##,
6565        default_severity: Severity::Allow,
6566        warn_since: None,
6567        deny_since: None,
6568    },
6569    Lint {
6570        label: "custom_mir",
6571        description: r##"# `custom_mir`
6572
6573Allows writing custom MIR
6574
6575This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
6576
6577------------------------
6578"##,
6579        default_severity: Severity::Allow,
6580        warn_since: None,
6581        deny_since: None,
6582    },
6583    Lint {
6584        label: "custom_test_frameworks",
6585        description: r##"# `custom_test_frameworks`
6586
6587The tracking issue for this feature is: [#50297]
6588
6589[#50297]: https://github.com/rust-lang/rust/issues/50297
6590
6591------------------------
6592
6593The `custom_test_frameworks` feature allows the use of `#[test_case]` and `#![test_runner]`.
6594Any function, const, or static can be annotated with `#[test_case]` causing it to be aggregated (like `#[test]`)
6595and be passed to the test runner determined by the `#![test_runner]` crate attribute.
6596
6597```rust
6598#![feature(custom_test_frameworks)]
6599#![test_runner(my_runner)]
6600
6601fn my_runner(tests: &[&i32]) {
6602    for t in tests {
6603        if **t == 0 {
6604            println!("PASSED");
6605        } else {
6606            println!("FAILED");
6607        }
6608    }
6609}
6610
6611#[test_case]
6612const WILL_PASS: i32 = 0;
6613
6614#[test_case]
6615const WILL_FAIL: i32 = 4;
6616```
6617"##,
6618        default_severity: Severity::Allow,
6619        warn_since: None,
6620        deny_since: None,
6621    },
6622    Lint {
6623        label: "darwin_objc",
6624        description: r##"# `darwin_objc`
6625
6626
6627
6628The tracking issue for this feature is: [#145496]
6629
6630[#145496]: https://github.com/rust-lang/rust/issues/145496
6631
6632------------------------
6633"##,
6634        default_severity: Severity::Allow,
6635        warn_since: None,
6636        deny_since: None,
6637    },
6638    Lint {
6639        label: "deadline_api",
6640        description: r##"# `deadline_api`
6641
6642
6643
6644The tracking issue for this feature is: [#46316]
6645
6646[#46316]: https://github.com/rust-lang/rust/issues/46316
6647
6648------------------------
6649"##,
6650        default_severity: Severity::Allow,
6651        warn_since: None,
6652        deny_since: None,
6653    },
6654    Lint {
6655        label: "debug_closure_helpers",
6656        description: r##"# `debug_closure_helpers`
6657
6658
6659
6660The tracking issue for this feature is: [#117729]
6661
6662[#117729]: https://github.com/rust-lang/rust/issues/117729
6663
6664------------------------
6665"##,
6666        default_severity: Severity::Allow,
6667        warn_since: None,
6668        deny_since: None,
6669    },
6670    Lint {
6671        label: "dec2flt",
6672        description: r##"# `dec2flt`
6673
6674This feature is internal to the Rust compiler and is not intended for general use.
6675
6676------------------------
6677"##,
6678        default_severity: Severity::Allow,
6679        warn_since: None,
6680        deny_since: None,
6681    },
6682    Lint {
6683        label: "decl_macro",
6684        description: r##"# `decl_macro`
6685
6686Allows declarative macros 2.0 (`macro`).
6687
6688The tracking issue for this feature is: [#39412]
6689
6690[#39412]: https://github.com/rust-lang/rust/issues/39412
6691
6692------------------------
6693"##,
6694        default_severity: Severity::Allow,
6695        warn_since: None,
6696        deny_since: None,
6697    },
6698    Lint {
6699        label: "default_field_values",
6700        description: r##"# `default_field_values`
6701
6702The tracking issue for this feature is: [#132162]
6703
6704[#132162]: https://github.com/rust-lang/rust/issues/132162
6705
6706The RFC for this feature is: [#3681]
6707
6708[#3681]: https://github.com/rust-lang/rfcs/blob/master/text/3681-default-field-values.md
6709
6710------------------------
6711
6712The `default_field_values` feature allows users to specify a const value for
6713individual fields in struct definitions, allowing those to be omitted from
6714initializers.
6715
6716## Examples
6717
6718```rust
6719#![feature(default_field_values)]
6720
6721#[derive(Default)]
6722struct Pet {
6723    name: Option<String>, // impl Default for Pet will use Default::default() for name
6724    age: i128 = 42, // impl Default for Pet will use the literal 42 for age
6725}
6726
6727fn main() {
6728    let a = Pet { name: Some(String::new()), .. }; // Pet { name: Some(""), age: 42 }
6729    let b = Pet::default(); // Pet { name: None, age: 42 }
6730    assert_eq!(a.age, b.age);
6731    // The following would be a compilation error: `name` needs to be specified
6732    // let _ = Pet { .. };
6733}
6734```
6735
6736## `#[derive(Default)]`
6737
6738When deriving Default, the provided values are then used. On enum variants,
6739the variant must still be marked with `#[default]` and have all its fields
6740with default values.
6741
6742```rust
6743#![feature(default_field_values)]
6744
6745#[derive(Default)]
6746enum A {
6747    #[default]
6748    B {
6749        x: i32 = 0,
6750        y: i32 = 0,
6751    },
6752    C,
6753}
6754```
6755
6756## Enum variants
6757
6758This feature also supports enum variants for both specifying default values
6759and `#[derive(Default)]`.
6760
6761## Interaction with `#[non_exhaustive]`
6762
6763A struct or enum variant marked with `#[non_exhaustive]` is not allowed to
6764have default field values.
6765
6766## Lints
6767
6768When manually implementing the `Default` trait for a type that has default
6769field values, if any of these are overridden in the impl the
6770`default_overrides_default_fields` lint will trigger. This lint is in place
6771to avoid surprising diverging behavior between `S { .. }` and
6772`S::default()`, where using the same type in both ways could result in
6773different values. The appropriate way to write a manual `Default`
6774implementation is to use the functional update syntax:
6775
6776```rust
6777#![feature(default_field_values)]
6778
6779struct Pet {
6780    name: String,
6781    age: i128 = 42, // impl Default for Pet will use the literal 42 for age
6782}
6783
6784impl Default for Pet {
6785    fn default() -> Pet {
6786        Pet {
6787            name: "no-name".to_string(),
6788            ..
6789        }
6790    }
6791}
6792```
6793"##,
6794        default_severity: Severity::Allow,
6795        warn_since: None,
6796        deny_since: None,
6797    },
6798    Lint {
6799        label: "deprecated_suggestion",
6800        description: r##"# `deprecated_suggestion`
6801
6802Allows having using `suggestion` in the `#[deprecated]` attribute.
6803
6804The tracking issue for this feature is: [#94785]
6805
6806[#94785]: https://github.com/rust-lang/rust/issues/94785
6807
6808------------------------
6809"##,
6810        default_severity: Severity::Allow,
6811        warn_since: None,
6812        deny_since: None,
6813    },
6814    Lint {
6815        label: "deque_extend_front",
6816        description: r##"# `deque_extend_front`
6817
6818
6819
6820The tracking issue for this feature is: [#146975]
6821
6822[#146975]: https://github.com/rust-lang/rust/issues/146975
6823
6824------------------------
6825"##,
6826        default_severity: Severity::Allow,
6827        warn_since: None,
6828        deny_since: None,
6829    },
6830    Lint {
6831        label: "deref_patterns",
6832        description: r##"# `deref_patterns`
6833
6834The tracking issue for this feature is: [#87121]
6835
6836[#87121]: https://github.com/rust-lang/rust/issues/87121
6837
6838------------------------
6839
6840> **Note**: This feature supersedes [`box_patterns`].
6841
6842This feature permits pattern matching on [smart pointers in the standard library] through their
6843`Deref` target types, either implicitly or with explicit `deref!(_)` patterns (the syntax of which
6844is currently a placeholder).
6845
6846```rust
6847#![feature(deref_patterns)]
6848
6849let mut v = vec![Box::new(Some(0))];
6850
6851// Implicit dereferences are inserted when a pattern can match against the
6852// result of repeatedly dereferencing but can't match against a smart
6853// pointer itself. This works alongside match ergonomics for references.
6854if let [Some(x)] = &mut v {
6855    *x += 1;
6856}
6857
6858// Explicit `deref!(_)` patterns may instead be used when finer control is
6859// needed, e.g. to dereference only a single smart pointer, or to bind the
6860// the result of dereferencing to a variable.
6861if let deref!([deref!(opt_x @ Some(1))]) = &mut v {
6862    opt_x.as_mut().map(|x| *x += 1);
6863}
6864
6865assert_eq!(v, [Box::new(Some(2))]);
6866```
6867
6868Without this feature, it may be necessary to introduce temporaries to represent dereferenced places
6869when matching on nested structures:
6870
6871```rust
6872let mut v = vec![Box::new(Some(0))];
6873if let [b] = &mut *v {
6874    if let Some(x) = &mut **b {
6875        *x += 1;
6876    }
6877}
6878if let [b] = &mut *v {
6879    if let opt_x @ Some(1) = &mut **b {
6880        opt_x.as_mut().map(|x| *x += 1);
6881    }
6882}
6883assert_eq!(v, [Box::new(Some(2))]);
6884```
6885
6886Like [`box_patterns`], deref patterns may move out of boxes:
6887
6888```rust
6889# #![feature(deref_patterns)]
6890struct NoCopy;
6891let deref!(x) = Box::new(NoCopy);
6892drop::<NoCopy>(x);
6893```
6894
6895Additionally, `deref_patterns` implements changes to string and byte string literal patterns,
6896allowing then to be used in deref patterns:
6897
6898```rust
6899# #![feature(deref_patterns)]
6900match ("test".to_string(), Box::from("test"), b"test".to_vec()) {
6901    ("test", "test", b"test") => {}
6902    _ => panic!(),
6903}
6904
6905// This works through multiple layers of reference and smart pointer:
6906match (&Box::new(&"test".to_string()), &&&"test") {
6907    ("test", "test") => {}
6908    _ => panic!(),
6909}
6910
6911// `deref!("...")` syntax may also be used:
6912match "test".to_string() {
6913    deref!("test") => {}
6914    _ => panic!(),
6915}
6916
6917// Matching on slices and arrays using literals is possible elsewhere as well:
6918match *"test" {
6919    "test" => {}
6920    _ => panic!(),
6921}
6922match *b"test" {
6923    b"test" => {}
6924    _ => panic!(),
6925}
6926match *(b"test" as &[u8]) {
6927    b"test" => {}
6928    _ => panic!(),
6929}
6930```
6931
6932[`box_patterns`]: ./box-patterns.md
6933[smart pointers in the standard library]: https://doc.rust-lang.org/std/ops/trait.DerefPure.html#implementors
6934"##,
6935        default_severity: Severity::Allow,
6936        warn_since: None,
6937        deny_since: None,
6938    },
6939    Lint {
6940        label: "deref_pure_trait",
6941        description: r##"# `deref_pure_trait`
6942
6943
6944
6945The tracking issue for this feature is: [#87121]
6946
6947[#87121]: https://github.com/rust-lang/rust/issues/87121
6948
6949------------------------
6950"##,
6951        default_severity: Severity::Allow,
6952        warn_since: None,
6953        deny_since: None,
6954    },
6955    Lint {
6956        label: "derive_clone_copy_internals",
6957        description: r##"# `derive_clone_copy_internals`
6958
6959This feature is internal to the Rust compiler and is not intended for general use.
6960
6961------------------------
6962"##,
6963        default_severity: Severity::Allow,
6964        warn_since: None,
6965        deny_since: None,
6966    },
6967    Lint {
6968        label: "derive_coerce_pointee",
6969        description: r##"# `derive_coerce_pointee`
6970
6971
6972
6973The tracking issue for this feature is: [#123430]
6974
6975[#123430]: https://github.com/rust-lang/rust/issues/123430
6976
6977------------------------
6978"##,
6979        default_severity: Severity::Allow,
6980        warn_since: None,
6981        deny_since: None,
6982    },
6983    Lint {
6984        label: "derive_const",
6985        description: r##"# `derive_const`
6986
6987
6988
6989The tracking issue for this feature is: [#118304]
6990
6991[#118304]: https://github.com/rust-lang/rust/issues/118304
6992
6993------------------------
6994"##,
6995        default_severity: Severity::Allow,
6996        warn_since: None,
6997        deny_since: None,
6998    },
6999    Lint {
7000        label: "derive_eq_internals",
7001        description: r##"# `derive_eq_internals`
7002
7003This feature is internal to the Rust compiler and is not intended for general use.
7004
7005------------------------
7006"##,
7007        default_severity: Severity::Allow,
7008        warn_since: None,
7009        deny_since: None,
7010    },
7011    Lint {
7012        label: "derive_from",
7013        description: r##"# `derive_from`
7014
7015Allows deriving the From trait on single-field structs.
7016
7017The tracking issue for this feature is: [#144889]
7018
7019[#144889]: https://github.com/rust-lang/rust/issues/144889
7020
7021------------------------
7022"##,
7023        default_severity: Severity::Allow,
7024        warn_since: None,
7025        deny_since: None,
7026    },
7027    Lint {
7028        label: "derive_macro_global_path",
7029        description: r##"# `derive_macro_global_path`
7030
7031
7032
7033The tracking issue for this feature is: [#154645]
7034
7035[#154645]: https://github.com/rust-lang/rust/issues/154645
7036
7037------------------------
7038"##,
7039        default_severity: Severity::Allow,
7040        warn_since: None,
7041        deny_since: None,
7042    },
7043    Lint {
7044        label: "diagnostic_on_const",
7045        description: r##"# `diagnostic_on_const`
7046
7047Allows giving non-const impls custom diagnostic messages if attempted to be used as const
7048
7049The tracking issue for this feature is: [#143874]
7050
7051[#143874]: https://github.com/rust-lang/rust/issues/143874
7052
7053------------------------
7054"##,
7055        default_severity: Severity::Allow,
7056        warn_since: None,
7057        deny_since: None,
7058    },
7059    Lint {
7060        label: "diagnostic_on_move",
7061        description: r##"# `diagnostic_on_move`
7062
7063The tracking issue for this feature is: [#154181]
7064
7065------------------------
7066
7067The `diagnostic_on_move` feature allows use of the `#[diagnostic::on_move]` attribute. It should be
7068placed on struct, enum and union declarations, though it is not an error to be located in other
7069positions. This attribute is a hint to the compiler to supplement the error message when the
7070annotated type is involved in a borrowcheck error.
7071
7072For example, [`File`] is annotated as such:
7073```rust
7074#![feature(diagnostic_on_move)]
7075
7076#[diagnostic::on_move(note = "you can use `File::try_clone` \
7077                             to duplicate a `File` instance")]
7078pub struct File {
7079    // ...
7080}
7081```
7082
7083When you try to use a `File` after it's already been moved, it will helpfully tell you about `try_clone`.
7084
7085The message and label can also be customized:
7086
7087```rust
7088#![feature(diagnostic_on_move)]
7089
7090use std::marker::PhantomData;
7091
7092#[diagnostic::on_move(
7093    message = "`{Self}` cannot be used multiple times",
7094    label = "this token may only be used once",
7095    note = "you can create a new `Token` with `Token::conjure()`"
7096)]
7097pub struct Token<'brand> {
7098    spooky: PhantomData<&'brand ()>,
7099}
7100
7101impl Token<'_> {
7102    pub fn conjure<'u>() -> Token<'u> {
7103        Token {
7104            spooky: PhantomData,
7105        }
7106    }
7107}
7108```
7109The user may try to use it like this:
7110```rust,compile_fail,E0382
7111# #![feature(diagnostic_on_move)]
7112#
7113# use std::marker::PhantomData;
7114#
7115# #[diagnostic::on_move(
7116#     message = "`{Self}` cannot be used multiple times",
7117#     label = "this token may only be used once",
7118#     note = "you can create a new `Token` with `Token::conjure()`"
7119# )]
7120# pub struct Token<'brand> {
7121#     spooky: PhantomData<&'brand ()>,
7122# }
7123#
7124# impl Token<'_> {
7125#     pub fn conjure<'u>() -> Token<'u> {
7126#         Token {
7127#             spooky: PhantomData,
7128#         }
7129#     }
7130# }
7131# fn main() {
7132let token = Token::conjure();
7133let _ = (token, token);
7134# }
7135```
7136This will result in the following error:
7137```text
7138error[E0382]: `Token` cannot be used multiple times
7139  --> src/main.rs:24:21
7140   |
7141 1 |     let token = Token::conjure();
7142   |         ----- this token may only be used once
7143 2 |     let _ = (token, token);
7144   |              -----  ^^^^^ value used here after move
7145   |              |
7146   |              value moved here
7147   |
7148   = note: you can create a new `Token` with `Token::conjure()`
7149```
7150
7151[`File`]: https://doc.rust-lang.org/nightly/std/fs/struct.File.html "File in std::fs"
7152[#154181]: https://github.com/rust-lang/rust/issues/154181 "Tracking Issue for #[diagnostic::on_move]"
7153"##,
7154        default_severity: Severity::Allow,
7155        warn_since: None,
7156        deny_since: None,
7157    },
7158    Lint {
7159        label: "diagnostic_on_unknown",
7160        description: r##"# `diagnostic_on_unknown`
7161
7162Allows giving unresolved imports a custom diagnostic message
7163
7164The tracking issue for this feature is: [#152900]
7165
7166[#152900]: https://github.com/rust-lang/rust/issues/152900
7167
7168------------------------
7169"##,
7170        default_severity: Severity::Allow,
7171        warn_since: None,
7172        deny_since: None,
7173    },
7174    Lint {
7175        label: "diagnostic_on_unmatch_args",
7176        description: r##"# `diagnostic_on_unmatch_args`
7177
7178The tracking issue for this feature is: [#155642]
7179
7180[#155642]: https://github.com/rust-lang/rust/issues/155642
7181
7182------------------------
7183
7184The `diagnostic_on_unmatch_args` feature adds the
7185`#[diagnostic::on_unmatch_args(...)]` attribute for declarative macros.
7186It lets a macro definition customize diagnostics for matcher failures after all arms have been
7187tried, such as incomplete invocations or trailing extra arguments.
7188
7189This attribute currently applies to declarative macros such as `macro_rules!` and `pub macro`.
7190It is currently used for errors emitted by declarative macro matching itself; fragment parser
7191errors still use their existing diagnostics.
7192
7193```rust,compile_fail
7194#![feature(diagnostic_on_unmatch_args)]
7195
7196#[diagnostic::on_unmatch_args(
7197    message = "invalid arguments to {This} macro invocation",
7198    label = "expected a type and value here",
7199    note = "this macro expects a type and a value, like `pair!(u8, 0)`",
7200    note = "see <link/to/docs>",
7201)]
7202macro_rules! pair {
7203    ($ty:ty, $value:expr) => {};
7204}
7205
7206pair!(u8);
7207```
7208
7209This emits output like:
7210
7211```text
7212error: invalid arguments to pair macro invocation
7213  --> example.rs:13:9
7214   |
72159  | macro_rules! pair {
7216   | ----------------- when calling this macro
7217...
721813 | pair!(u8);
7219   |         ^ expected a type and value here
7220   |
7221note: while trying to match `,`
7222  --> example.rs:10:12
7223   |
722410 |     ($ty:ty, $value:expr) => {};
7225   |            ^
7226   = note: this macro expects a type and a value, like `pair!(u8, 0)`
7227   = note: see <link/to/docs>
7228```
7229"##,
7230        default_severity: Severity::Allow,
7231        warn_since: None,
7232        deny_since: None,
7233    },
7234    Lint {
7235        label: "dir_entry_ext2",
7236        description: r##"# `dir_entry_ext2`
7237
7238
7239
7240The tracking issue for this feature is: [#85573]
7241
7242[#85573]: https://github.com/rust-lang/rust/issues/85573
7243
7244------------------------
7245"##,
7246        default_severity: Severity::Allow,
7247        warn_since: None,
7248        deny_since: None,
7249    },
7250    Lint {
7251        label: "dirfd",
7252        description: r##"# `dirfd`
7253
7254
7255
7256The tracking issue for this feature is: [#120426]
7257
7258[#120426]: https://github.com/rust-lang/rust/issues/120426
7259
7260------------------------
7261"##,
7262        default_severity: Severity::Allow,
7263        warn_since: None,
7264        deny_since: None,
7265    },
7266    Lint {
7267        label: "dirhandle",
7268        description: r##"# `dirhandle`
7269
7270
7271
7272The tracking issue for this feature is: [#120426]
7273
7274[#120426]: https://github.com/rust-lang/rust/issues/120426
7275
7276------------------------
7277"##,
7278        default_severity: Severity::Allow,
7279        warn_since: None,
7280        deny_since: None,
7281    },
7282    Lint {
7283        label: "discriminant_kind",
7284        description: r##"# `discriminant_kind`
7285
7286
7287
7288This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
7289
7290------------------------
7291"##,
7292        default_severity: Severity::Allow,
7293        warn_since: None,
7294        deny_since: None,
7295    },
7296    Lint {
7297        label: "disjoint_bitor",
7298        description: r##"# `disjoint_bitor`
7299
7300
7301
7302The tracking issue for this feature is: [#135758]
7303
7304[#135758]: https://github.com/rust-lang/rust/issues/135758
7305
7306------------------------
7307"##,
7308        default_severity: Severity::Allow,
7309        warn_since: None,
7310        deny_since: None,
7311    },
7312    Lint {
7313        label: "dispatch_from_dyn",
7314        description: r##"# `dispatch_from_dyn`
7315
7316
7317
7318This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
7319
7320------------------------
7321"##,
7322        default_severity: Severity::Allow,
7323        warn_since: None,
7324        deny_since: None,
7325    },
7326    Lint {
7327        label: "doc_cfg",
7328        description: r##"# `doc_cfg`
7329
7330The tracking issue for this feature is: [#43781]
7331
7332------
7333
7334The `doc_cfg` feature allows an API be documented as only available in some specific platforms.
7335This attribute has two effects:
7336
73371. In the annotated item's documentation, there will be a message saying "Available on
7338    (platform) only".
7339
73402. The item's doc-tests will only run on the specific platform.
7341
7342In addition to allowing the use of the `#[doc(cfg)]` attribute, this feature enables the use of a
7343special conditional compilation flag, `#[cfg(doc)]`, set whenever building documentation on your
7344crate.
7345
7346This feature was introduced as part of PR [#43348] to allow the platform-specific parts of the
7347standard library be documented.
7348
7349```rust
7350#![feature(doc_cfg)]
7351
7352#[cfg(any(windows, doc))]
7353#[doc(cfg(windows))]
7354/// The application's icon in the notification area (a.k.a. system tray).
7355///
7356/// # Examples
7357///
7358/// ```no_run
7359/// extern crate my_awesome_ui_library;
7360/// use my_awesome_ui_library::current_app;
7361/// use my_awesome_ui_library::windows::notification;
7362///
7363/// let icon = current_app().get::<notification::Icon>();
7364/// icon.show();
7365/// icon.show_message("Hello");
7366/// ```
7367pub struct Icon {
7368    // ...
7369}
7370```
7371
7372[#43781]: https://github.com/rust-lang/rust/issues/43781
7373[#43348]: https://github.com/rust-lang/rust/issues/43348
7374"##,
7375        default_severity: Severity::Allow,
7376        warn_since: None,
7377        deny_since: None,
7378    },
7379    Lint {
7380        label: "doc_masked",
7381        description: r##"# `doc_masked`
7382
7383The tracking issue for this feature is: [#44027]
7384
7385-----
7386
7387The `doc_masked` feature allows a crate to exclude types from a given crate from appearing in lists
7388of trait implementations. The specifics of the feature are as follows:
7389
73901. When rustdoc encounters an `extern crate` statement annotated with a `#[doc(masked)]` attribute,
7391   it marks the crate as being masked.
7392
73932. When listing traits a given type implements, rustdoc ensures that traits from masked crates are
7394   not emitted into the documentation.
7395
73963. When listing types that implement a given trait, rustdoc ensures that types from masked crates
7397   are not emitted into the documentation.
7398
7399This feature was introduced in PR [#44026] to ensure that compiler-internal and
7400implementation-specific types and traits were not included in the standard library's documentation.
7401Such types would introduce broken links into the documentation.
7402
7403[#44026]: https://github.com/rust-lang/rust/pull/44026
7404[#44027]: https://github.com/rust-lang/rust/pull/44027
7405"##,
7406        default_severity: Severity::Allow,
7407        warn_since: None,
7408        deny_since: None,
7409    },
7410    Lint {
7411        label: "doc_notable_trait",
7412        description: r##"# `doc_notable_trait`
7413
7414The tracking issue for this feature is: [#45040]
7415
7416The `doc_notable_trait` feature allows the use of the `#[doc(notable_trait)]`
7417attribute, which will display the trait in a "Notable traits" dialog for
7418functions returning types that implement the trait. For example, this attribute
7419is applied to the `Iterator`, `Future`, `io::Read`, and `io::Write` traits in
7420the standard library.
7421
7422You can do this on your own traits like so:
7423
7424```
7425#![feature(doc_notable_trait)]
7426
7427#[doc(notable_trait)]
7428pub trait MyTrait {}
7429
7430pub struct MyStruct;
7431impl MyTrait for MyStruct {}
7432
7433/// The docs for this function will have a button that displays a dialog about
7434/// `MyStruct` implementing `MyTrait`.
7435pub fn my_fn() -> MyStruct { MyStruct }
7436```
7437
7438This feature was originally implemented in PR [#45039].
7439
7440See also its documentation in [the rustdoc book][rustdoc-book-notable_trait].
7441
7442[#45040]: https://github.com/rust-lang/rust/issues/45040
7443[#45039]: https://github.com/rust-lang/rust/pull/45039
7444[rustdoc-book-notable_trait]: ../../rustdoc/unstable-features.html#adding-your-trait-to-the-notable-traits-dialog
7445"##,
7446        default_severity: Severity::Allow,
7447        warn_since: None,
7448        deny_since: None,
7449    },
7450    Lint {
7451        label: "downcast_unchecked",
7452        description: r##"# `downcast_unchecked`
7453
7454
7455
7456The tracking issue for this feature is: [#90850]
7457
7458[#90850]: https://github.com/rust-lang/rust/issues/90850
7459
7460------------------------
7461"##,
7462        default_severity: Severity::Allow,
7463        warn_since: None,
7464        deny_since: None,
7465    },
7466    Lint {
7467        label: "drain_keep_rest",
7468        description: r##"# `drain_keep_rest`
7469
7470
7471
7472The tracking issue for this feature is: [#101122]
7473
7474[#101122]: https://github.com/rust-lang/rust/issues/101122
7475
7476------------------------
7477"##,
7478        default_severity: Severity::Allow,
7479        warn_since: None,
7480        deny_since: None,
7481    },
7482    Lint {
7483        label: "drop_guard",
7484        description: r##"# `drop_guard`
7485
7486
7487
7488The tracking issue for this feature is: [#144426]
7489
7490[#144426]: https://github.com/rust-lang/rust/issues/144426
7491
7492------------------------
7493"##,
7494        default_severity: Severity::Allow,
7495        warn_since: None,
7496        deny_since: None,
7497    },
7498    Lint {
7499        label: "dropck_eyepatch",
7500        description: r##"# `dropck_eyepatch`
7501
7502Allows using the `may_dangle` attribute (RFC 1327).
7503
7504The tracking issue for this feature is: [#34761]
7505
7506[#34761]: https://github.com/rust-lang/rust/issues/34761
7507
7508------------------------
7509"##,
7510        default_severity: Severity::Allow,
7511        warn_since: None,
7512        deny_since: None,
7513    },
7514    Lint {
7515        label: "duration_constants",
7516        description: r##"# `duration_constants`
7517
7518
7519
7520The tracking issue for this feature is: [#57391]
7521
7522[#57391]: https://github.com/rust-lang/rust/issues/57391
7523
7524------------------------
7525"##,
7526        default_severity: Severity::Allow,
7527        warn_since: None,
7528        deny_since: None,
7529    },
7530    Lint {
7531        label: "duration_constructors",
7532        description: r##"# `duration_constructors`
7533
7534The tracking issue for this feature is: [#120301]
7535
7536[#120301]: https://github.com/rust-lang/rust/issues/120301
7537
7538------------------------
7539
7540Add the methods `from_days` and `from_weeks` to `Duration`.
7541"##,
7542        default_severity: Severity::Allow,
7543        warn_since: None,
7544        deny_since: None,
7545    },
7546    Lint {
7547        label: "duration_integer_division",
7548        description: r##"# `duration_integer_division`
7549
7550
7551
7552The tracking issue for this feature is: [#149573]
7553
7554[#149573]: https://github.com/rust-lang/rust/issues/149573
7555
7556------------------------
7557"##,
7558        default_severity: Severity::Allow,
7559        warn_since: None,
7560        deny_since: None,
7561    },
7562    Lint {
7563        label: "duration_millis_float",
7564        description: r##"# `duration_millis_float`
7565
7566
7567
7568The tracking issue for this feature is: [#122451]
7569
7570[#122451]: https://github.com/rust-lang/rust/issues/122451
7571
7572------------------------
7573"##,
7574        default_severity: Severity::Allow,
7575        warn_since: None,
7576        deny_since: None,
7577    },
7578    Lint {
7579        label: "duration_units",
7580        description: r##"# `duration_units`
7581
7582
7583
7584The tracking issue for this feature is: [#120301]
7585
7586[#120301]: https://github.com/rust-lang/rust/issues/120301
7587
7588------------------------
7589"##,
7590        default_severity: Severity::Allow,
7591        warn_since: None,
7592        deny_since: None,
7593    },
7594    Lint {
7595        label: "edition_panic",
7596        description: r##"# `edition_panic`
7597
7598
7599
7600This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
7601
7602------------------------
7603"##,
7604        default_severity: Severity::Allow,
7605        warn_since: None,
7606        deny_since: None,
7607    },
7608    Lint {
7609        label: "effective_target_features",
7610        description: r##"# `effective_target_features`
7611
7612Allows features to allow target_feature to better interact with traits.
7613
7614The tracking issue for this feature is: [#143352]
7615
7616[#143352]: https://github.com/rust-lang/rust/issues/143352
7617
7618------------------------
7619"##,
7620        default_severity: Severity::Allow,
7621        warn_since: None,
7622        deny_since: None,
7623    },
7624    Lint {
7625        label: "eii_internals",
7626        description: r##"# `eii_internals`
7627
7628Implementation details of externally implementable items
7629
7630This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
7631
7632------------------------
7633"##,
7634        default_severity: Severity::Allow,
7635        warn_since: None,
7636        deny_since: None,
7637    },
7638    Lint {
7639        label: "ergonomic_clones",
7640        description: r##"# `ergonomic_clones`
7641
7642Allows the .use postfix syntax `x.use` and use closures `use |x| { ... }`
7643
7644The tracking issue for this feature is: [#132290]
7645
7646[#132290]: https://github.com/rust-lang/rust/issues/132290
7647
7648------------------------
7649"##,
7650        default_severity: Severity::Allow,
7651        warn_since: None,
7652        deny_since: None,
7653    },
7654    Lint {
7655        label: "ermsb_target_feature",
7656        description: r##"# `ermsb_target_feature`
7657
7658ermsb target feature on x86.
7659
7660The tracking issue for this feature is: [#150249]
7661
7662[#150249]: https://github.com/rust-lang/rust/issues/150249
7663
7664------------------------
7665"##,
7666        default_severity: Severity::Allow,
7667        warn_since: None,
7668        deny_since: None,
7669    },
7670    Lint {
7671        label: "error_generic_member_access",
7672        description: r##"# `error_generic_member_access`
7673
7674
7675
7676The tracking issue for this feature is: [#99301]
7677
7678[#99301]: https://github.com/rust-lang/rust/issues/99301
7679
7680------------------------
7681"##,
7682        default_severity: Severity::Allow,
7683        warn_since: None,
7684        deny_since: None,
7685    },
7686    Lint {
7687        label: "error_iter",
7688        description: r##"# `error_iter`
7689
7690
7691
7692The tracking issue for this feature is: [#58520]
7693
7694[#58520]: https://github.com/rust-lang/rust/issues/58520
7695
7696------------------------
7697"##,
7698        default_severity: Severity::Allow,
7699        warn_since: None,
7700        deny_since: None,
7701    },
7702    Lint {
7703        label: "error_reporter",
7704        description: r##"# `error_reporter`
7705
7706
7707
7708The tracking issue for this feature is: [#90172]
7709
7710[#90172]: https://github.com/rust-lang/rust/issues/90172
7711
7712------------------------
7713"##,
7714        default_severity: Severity::Allow,
7715        warn_since: None,
7716        deny_since: None,
7717    },
7718    Lint {
7719        label: "error_type_id",
7720        description: r##"# `error_type_id`
7721
7722
7723
7724The tracking issue for this feature is: [#60784]
7725
7726[#60784]: https://github.com/rust-lang/rust/issues/60784
7727
7728------------------------
7729"##,
7730        default_severity: Severity::Allow,
7731        warn_since: None,
7732        deny_since: None,
7733    },
7734    Lint {
7735        label: "exact_bitshifts",
7736        description: r##"# `exact_bitshifts`
7737
7738
7739
7740The tracking issue for this feature is: [#144336]
7741
7742[#144336]: https://github.com/rust-lang/rust/issues/144336
7743
7744------------------------
7745"##,
7746        default_severity: Severity::Allow,
7747        warn_since: None,
7748        deny_since: None,
7749    },
7750    Lint {
7751        label: "exact_div",
7752        description: r##"# `exact_div`
7753
7754
7755
7756The tracking issue for this feature is: [#139911]
7757
7758[#139911]: https://github.com/rust-lang/rust/issues/139911
7759
7760------------------------
7761"##,
7762        default_severity: Severity::Allow,
7763        warn_since: None,
7764        deny_since: None,
7765    },
7766    Lint {
7767        label: "exact_size_is_empty",
7768        description: r##"# `exact_size_is_empty`
7769
7770
7771
7772The tracking issue for this feature is: [#35428]
7773
7774[#35428]: https://github.com/rust-lang/rust/issues/35428
7775
7776------------------------
7777"##,
7778        default_severity: Severity::Allow,
7779        warn_since: None,
7780        deny_since: None,
7781    },
7782    Lint {
7783        label: "exclusive_wrapper",
7784        description: r##"# `exclusive_wrapper`
7785
7786
7787
7788The tracking issue for this feature is: [#98407]
7789
7790[#98407]: https://github.com/rust-lang/rust/issues/98407
7791
7792------------------------
7793"##,
7794        default_severity: Severity::Allow,
7795        warn_since: None,
7796        deny_since: None,
7797    },
7798    Lint {
7799        label: "exhaustive_patterns",
7800        description: r##"# `exhaustive_patterns`
7801
7802Allows exhaustive pattern matching on types that contain uninhabited types.
7803
7804The tracking issue for this feature is: [#51085]
7805
7806[#51085]: https://github.com/rust-lang/rust/issues/51085
7807
7808------------------------
7809"##,
7810        default_severity: Severity::Allow,
7811        warn_since: None,
7812        deny_since: None,
7813    },
7814    Lint {
7815        label: "exit_status_error",
7816        description: r##"# `exit_status_error`
7817
7818
7819
7820The tracking issue for this feature is: [#84908]
7821
7822[#84908]: https://github.com/rust-lang/rust/issues/84908
7823
7824------------------------
7825"##,
7826        default_severity: Severity::Allow,
7827        warn_since: None,
7828        deny_since: None,
7829    },
7830    Lint {
7831        label: "exitcode_exit_method",
7832        description: r##"# `exitcode_exit_method`
7833
7834
7835
7836The tracking issue for this feature is: [#97100]
7837
7838[#97100]: https://github.com/rust-lang/rust/issues/97100
7839
7840------------------------
7841"##,
7842        default_severity: Severity::Allow,
7843        warn_since: None,
7844        deny_since: None,
7845    },
7846    Lint {
7847        label: "explicit_extern_abis",
7848        description: r##"# `explicit_extern_abis`
7849
7850The tracking issue for this feature is: [#134986]
7851
7852------
7853
7854Disallow `extern` without an explicit ABI. We should write `extern "C"`
7855(or another ABI) instead of just `extern`.
7856
7857By making the ABI explicit, it becomes much clearer that "C" is just one of the
7858possible choices, rather than the "standard" way for external functions.
7859Removing the default makes it easier to add a new ABI on equal footing as "C".
7860
7861```rust,editionfuture,compile_fail
7862#![feature(explicit_extern_abis)]
7863
7864extern fn function1() {}  // ERROR `extern` declarations without an explicit ABI
7865                          // are disallowed
7866
7867extern "C" fn function2() {} // compiles
7868
7869extern "aapcs" fn function3() {} // compiles
7870```
7871
7872[#134986]: https://github.com/rust-lang/rust/issues/134986
7873"##,
7874        default_severity: Severity::Allow,
7875        warn_since: None,
7876        deny_since: None,
7877    },
7878    Lint {
7879        label: "explicit_tail_calls",
7880        description: r##"# `explicit_tail_calls`
7881
7882Allows explicit tail calls via `become` expression.
7883
7884The tracking issue for this feature is: [#112788]
7885
7886[#112788]: https://github.com/rust-lang/rust/issues/112788
7887
7888------------------------
7889"##,
7890        default_severity: Severity::Allow,
7891        warn_since: None,
7892        deny_since: None,
7893    },
7894    Lint {
7895        label: "export_stable",
7896        description: r##"# `export_stable`
7897
7898Allows using `#[export_stable]` which indicates that an item is exportable.
7899
7900The tracking issue for this feature is: [#139939]
7901
7902[#139939]: https://github.com/rust-lang/rust/issues/139939
7903
7904------------------------
7905"##,
7906        default_severity: Severity::Allow,
7907        warn_since: None,
7908        deny_since: None,
7909    },
7910    Lint {
7911        label: "extend_one",
7912        description: r##"# `extend_one`
7913
7914
7915
7916The tracking issue for this feature is: [#72631]
7917
7918[#72631]: https://github.com/rust-lang/rust/issues/72631
7919
7920------------------------
7921"##,
7922        default_severity: Severity::Allow,
7923        warn_since: None,
7924        deny_since: None,
7925    },
7926    Lint {
7927        label: "extend_one_unchecked",
7928        description: r##"# `extend_one_unchecked`
7929
7930
7931
7932This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
7933
7934------------------------
7935"##,
7936        default_severity: Severity::Allow,
7937        warn_since: None,
7938        deny_since: None,
7939    },
7940    Lint {
7941        label: "extern_item_impls",
7942        description: r##"# `extern_item_impls`
7943
7944Externally implementable items
7945
7946The tracking issue for this feature is: [#125418]
7947
7948[#125418]: https://github.com/rust-lang/rust/issues/125418
7949
7950------------------------
7951"##,
7952        default_severity: Severity::Allow,
7953        warn_since: None,
7954        deny_since: None,
7955    },
7956    Lint {
7957        label: "extern_types",
7958        description: r##"# `extern_types`
7959
7960Allows defining `extern type`s.
7961
7962The tracking issue for this feature is: [#43467]
7963
7964[#43467]: https://github.com/rust-lang/rust/issues/43467
7965
7966------------------------
7967"##,
7968        default_severity: Severity::Allow,
7969        warn_since: None,
7970        deny_since: None,
7971    },
7972    Lint {
7973        label: "f128",
7974        description: r##"# `f128`
7975
7976The tracking issue for this feature is: [#116909]
7977
7978[#116909]: https://github.com/rust-lang/rust/issues/116909
7979
7980---
7981
7982Enable the `f128` type for IEEE 128-bit floating numbers (quad precision).
7983"##,
7984        default_severity: Severity::Allow,
7985        warn_since: None,
7986        deny_since: None,
7987    },
7988    Lint {
7989        label: "f16",
7990        description: r##"# `f16`
7991
7992The tracking issue for this feature is: [#116909]
7993
7994[#116909]: https://github.com/rust-lang/rust/issues/116909
7995
7996---
7997
7998Enable the `f16` type for IEEE 16-bit floating numbers (half precision).
7999"##,
8000        default_severity: Severity::Allow,
8001        warn_since: None,
8002        deny_since: None,
8003    },
8004    Lint {
8005        label: "f32_from_f16",
8006        description: r##"# `f32_from_f16`
8007
8008
8009
8010The tracking issue for this feature is: [#154005]
8011
8012[#154005]: https://github.com/rust-lang/rust/issues/154005
8013
8014------------------------
8015"##,
8016        default_severity: Severity::Allow,
8017        warn_since: None,
8018        deny_since: None,
8019    },
8020    Lint {
8021        label: "fd",
8022        description: r##"# `fd`
8023
8024This feature is internal to the Rust compiler and is not intended for general use.
8025
8026------------------------
8027"##,
8028        default_severity: Severity::Allow,
8029        warn_since: None,
8030        deny_since: None,
8031    },
8032    Lint {
8033        label: "ffi_const",
8034        description: r##"# `ffi_const`
8035
8036The tracking issue for this feature is: [#58328]
8037
8038------
8039
8040The `#[ffi_const]` attribute applies clang's `const` attribute to foreign
8041functions declarations.
8042
8043That is, `#[ffi_const]` functions shall have no effects except for its return
8044value, which can only depend on the values of the function parameters, and is
8045not affected by changes to the observable state of the program.
8046
8047Applying the `#[ffi_const]` attribute to a function that violates these
8048requirements is undefined behaviour.
8049
8050This attribute enables Rust to perform common optimizations, like sub-expression
8051elimination, and it can avoid emitting some calls in repeated invocations of the
8052function with the same argument values regardless of other operations being
8053performed in between these functions calls (as opposed to `#[ffi_pure]`
8054functions).
8055
8056## Pitfalls
8057
8058A `#[ffi_const]` function can only read global memory that would not affect
8059its return value for the whole execution of the program (e.g. immutable global
8060memory). `#[ffi_const]` functions are referentially-transparent and therefore
8061more strict than `#[ffi_pure]` functions.
8062
8063A common pitfall involves applying the `#[ffi_const]` attribute to a
8064function that reads memory through pointer arguments which do not necessarily
8065point to immutable global memory.
8066
8067A `#[ffi_const]` function that returns unit has no effect on the abstract
8068machine's state, and a `#[ffi_const]` function cannot be `#[ffi_pure]`.
8069
8070A `#[ffi_const]` function must not diverge, neither via a side effect (e.g. a
8071call to `abort`) nor by infinite loops.
8072
8073When translating C headers to Rust FFI, it is worth verifying for which targets
8074the `const` attribute is enabled in those headers, and using the appropriate
8075`cfg` macros in the Rust side to match those definitions. While the semantics of
8076`const` are implemented identically by many C and C++ compilers, e.g., clang,
8077[GCC], [ARM C/C++ compiler], [IBM ILE C/C++], etc. they are not necessarily
8078implemented in this way on all of them. It is therefore also worth verifying
8079that the semantics of the C toolchain used to compile the binary being linked
8080against are compatible with those of the `#[ffi_const]`.
8081
8082[#58328]: https://github.com/rust-lang/rust/issues/58328
8083[ARM C/C++ compiler]: http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0491c/Cacgigch.html
8084[GCC]: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-const-function-attribute
8085[IBM ILE C/C++]: https://www.ibm.com/support/knowledgecenter/fr/ssw_ibm_i_71/rzarg/fn_attrib_const.htm
8086"##,
8087        default_severity: Severity::Allow,
8088        warn_since: None,
8089        deny_since: None,
8090    },
8091    Lint {
8092        label: "ffi_pure",
8093        description: r##"# `ffi_pure`
8094
8095The tracking issue for this feature is: [#58329]
8096
8097------
8098
8099The `#[ffi_pure]` attribute applies clang's `pure` attribute to foreign
8100functions declarations.
8101
8102That is, `#[ffi_pure]` functions shall have no effects except for its return
8103value, which shall not change across two consecutive function calls with
8104the same parameters.
8105
8106Applying the `#[ffi_pure]` attribute to a function that violates these
8107requirements is undefined behavior.
8108
8109This attribute enables Rust to perform common optimizations, like sub-expression
8110elimination and loop optimizations. Some common examples of pure functions are
8111`strlen` or `memcmp`.
8112
8113These optimizations are only applicable when the compiler can prove that no
8114program state observable by the `#[ffi_pure]` function has changed between calls
8115of the function, which could alter the result. See also the `#[ffi_const]`
8116attribute, which provides stronger guarantees regarding the allowable behavior
8117of a function, enabling further optimization.
8118
8119## Pitfalls
8120
8121A `#[ffi_pure]` function can read global memory through the function
8122parameters (e.g. pointers), globals, etc. `#[ffi_pure]` functions are not
8123referentially-transparent, and are therefore more relaxed than `#[ffi_const]`
8124functions.
8125
8126However, accessing global memory through volatile or atomic reads can violate the
8127requirement that two consecutive function calls shall return the same value.
8128
8129A `pure` function that returns unit has no effect on the abstract machine's
8130state.
8131
8132A `#[ffi_pure]` function must not diverge, neither via a side effect (e.g. a
8133call to `abort`) nor by infinite loops.
8134
8135When translating C headers to Rust FFI, it is worth verifying for which targets
8136the `pure` attribute is enabled in those headers, and using the appropriate
8137`cfg` macros in the Rust side to match those definitions. While the semantics of
8138`pure` are implemented identically by many C and C++ compilers, e.g., clang,
8139[GCC], [ARM C/C++ compiler], [IBM ILE C/C++], etc. they are not necessarily
8140implemented in this way on all of them. It is therefore also worth verifying
8141that the semantics of the C toolchain used to compile the binary being linked
8142against are compatible with those of the `#[ffi_pure]`.
8143
8144
8145[#58329]: https://github.com/rust-lang/rust/issues/58329
8146[ARM C/C++ compiler]: http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0491c/Cacigdac.html
8147[GCC]: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-pure-function-attribute
8148[IBM ILE C/C++]: https://www.ibm.com/support/knowledgecenter/fr/ssw_ibm_i_71/rzarg/fn_attrib_pure.htm
8149"##,
8150        default_severity: Severity::Allow,
8151        warn_since: None,
8152        deny_since: None,
8153    },
8154    Lint {
8155        label: "field_projections",
8156        description: r##"# `field_projections`
8157
8158Experimental field projections.
8159
8160The tracking issue for this feature is: [#145383]
8161
8162[#145383]: https://github.com/rust-lang/rust/issues/145383
8163
8164------------------------
8165"##,
8166        default_severity: Severity::Allow,
8167        warn_since: None,
8168        deny_since: None,
8169    },
8170    Lint {
8171        label: "field_representing_type_raw",
8172        description: r##"# `field_representing_type_raw`
8173
8174Implementation details of field representing types.
8175
8176This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
8177
8178------------------------
8179"##,
8180        default_severity: Severity::Allow,
8181        warn_since: None,
8182        deny_since: None,
8183    },
8184    Lint {
8185        label: "file_buffered",
8186        description: r##"# `file_buffered`
8187
8188
8189
8190The tracking issue for this feature is: [#130804]
8191
8192[#130804]: https://github.com/rust-lang/rust/issues/130804
8193
8194------------------------
8195"##,
8196        default_severity: Severity::Allow,
8197        warn_since: None,
8198        deny_since: None,
8199    },
8200    Lint {
8201        label: "final_associated_functions",
8202        description: r##"# `final_associated_functions`
8203
8204Allows marking trait functions as `final` to prevent overriding impls
8205
8206The tracking issue for this feature is: [#131179]
8207
8208[#131179]: https://github.com/rust-lang/rust/issues/131179
8209
8210------------------------
8211"##,
8212        default_severity: Severity::Allow,
8213        warn_since: None,
8214        deny_since: None,
8215    },
8216    Lint {
8217        label: "float_algebraic",
8218        description: r##"# `float_algebraic`
8219
8220
8221
8222The tracking issue for this feature is: [#136469]
8223
8224[#136469]: https://github.com/rust-lang/rust/issues/136469
8225
8226------------------------
8227"##,
8228        default_severity: Severity::Allow,
8229        warn_since: None,
8230        deny_since: None,
8231    },
8232    Lint {
8233        label: "float_bits_const",
8234        description: r##"# `float_bits_const`
8235
8236
8237
8238The tracking issue for this feature is: [#151073]
8239
8240[#151073]: https://github.com/rust-lang/rust/issues/151073
8241
8242------------------------
8243"##,
8244        default_severity: Severity::Allow,
8245        warn_since: None,
8246        deny_since: None,
8247    },
8248    Lint {
8249        label: "float_erf",
8250        description: r##"# `float_erf`
8251
8252
8253
8254The tracking issue for this feature is: [#136321]
8255
8256[#136321]: https://github.com/rust-lang/rust/issues/136321
8257
8258------------------------
8259"##,
8260        default_severity: Severity::Allow,
8261        warn_since: None,
8262        deny_since: None,
8263    },
8264    Lint {
8265        label: "float_exact_integer_constants",
8266        description: r##"# `float_exact_integer_constants`
8267
8268
8269
8270The tracking issue for this feature is: [#152466]
8271
8272[#152466]: https://github.com/rust-lang/rust/issues/152466
8273
8274------------------------
8275"##,
8276        default_severity: Severity::Allow,
8277        warn_since: None,
8278        deny_since: None,
8279    },
8280    Lint {
8281        label: "float_gamma",
8282        description: r##"# `float_gamma`
8283
8284
8285
8286The tracking issue for this feature is: [#99842]
8287
8288[#99842]: https://github.com/rust-lang/rust/issues/99842
8289
8290------------------------
8291"##,
8292        default_severity: Severity::Allow,
8293        warn_since: None,
8294        deny_since: None,
8295    },
8296    Lint {
8297        label: "float_masks",
8298        description: r##"# `float_masks`
8299
8300
8301
8302The tracking issue for this feature is: [#154064]
8303
8304[#154064]: https://github.com/rust-lang/rust/issues/154064
8305
8306------------------------
8307"##,
8308        default_severity: Severity::Allow,
8309        warn_since: None,
8310        deny_since: None,
8311    },
8312    Lint {
8313        label: "float_minimum_maximum",
8314        description: r##"# `float_minimum_maximum`
8315
8316
8317
8318The tracking issue for this feature is: [#91079]
8319
8320[#91079]: https://github.com/rust-lang/rust/issues/91079
8321
8322------------------------
8323"##,
8324        default_severity: Severity::Allow,
8325        warn_since: None,
8326        deny_since: None,
8327    },
8328    Lint {
8329        label: "flt2dec",
8330        description: r##"# `flt2dec`
8331
8332This feature is internal to the Rust compiler and is not intended for general use.
8333
8334------------------------
8335"##,
8336        default_severity: Severity::Allow,
8337        warn_since: None,
8338        deny_since: None,
8339    },
8340    Lint {
8341        label: "fma4_target_feature",
8342        description: r##"# `fma4_target_feature`
8343
8344fma4 target feature on x86.
8345
8346The tracking issue for this feature is: [#155233]
8347
8348[#155233]: https://github.com/rust-lang/rust/issues/155233
8349
8350------------------------
8351"##,
8352        default_severity: Severity::Allow,
8353        warn_since: None,
8354        deny_since: None,
8355    },
8356    Lint {
8357        label: "fmt_arguments_from_str",
8358        description: r##"# `fmt_arguments_from_str`
8359
8360
8361
8362The tracking issue for this feature is: [#148905]
8363
8364[#148905]: https://github.com/rust-lang/rust/issues/148905
8365
8366------------------------
8367"##,
8368        default_severity: Severity::Allow,
8369        warn_since: None,
8370        deny_since: None,
8371    },
8372    Lint {
8373        label: "fmt_debug",
8374        description: r##"# `fmt_debug`
8375
8376Controlling the behavior of fmt::Debug
8377
8378The tracking issue for this feature is: [#129709]
8379
8380[#129709]: https://github.com/rust-lang/rust/issues/129709
8381
8382------------------------
8383"##,
8384        default_severity: Severity::Allow,
8385        warn_since: None,
8386        deny_since: None,
8387    },
8388    Lint {
8389        label: "fmt_helpers_for_derive",
8390        description: r##"# `fmt_helpers_for_derive`
8391
8392
8393
8394This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
8395
8396------------------------
8397"##,
8398        default_severity: Severity::Allow,
8399        warn_since: None,
8400        deny_since: None,
8401    },
8402    Lint {
8403        label: "fmt_internals",
8404        description: r##"# `fmt_internals`
8405
8406This feature is internal to the Rust compiler and is not intended for general use.
8407
8408------------------------
8409"##,
8410        default_severity: Severity::Allow,
8411        warn_since: None,
8412        deny_since: None,
8413    },
8414    Lint {
8415        label: "fn_align",
8416        description: r##"# `fn_align`
8417
8418Allows using `#[align(...)]` on function items
8419
8420The tracking issue for this feature is: [#82232]
8421
8422[#82232]: https://github.com/rust-lang/rust/issues/82232
8423
8424------------------------
8425"##,
8426        default_severity: Severity::Allow,
8427        warn_since: None,
8428        deny_since: None,
8429    },
8430    Lint {
8431        label: "fn_delegation",
8432        description: r##"# `fn_delegation`
8433
8434Support delegating implementation of functions to other already implemented functions.
8435
8436The tracking issue for this feature is: [#118212]
8437
8438[#118212]: https://github.com/rust-lang/rust/issues/118212
8439
8440------------------------
8441"##,
8442        default_severity: Severity::Allow,
8443        warn_since: None,
8444        deny_since: None,
8445    },
8446    Lint {
8447        label: "fn_ptr_trait",
8448        description: r##"# `fn_ptr_trait`
8449
8450
8451
8452This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
8453
8454------------------------
8455"##,
8456        default_severity: Severity::Allow,
8457        warn_since: None,
8458        deny_since: None,
8459    },
8460    Lint {
8461        label: "fn_traits",
8462        description: r##"# `fn_traits`
8463
8464The tracking issue for this feature is [#29625]
8465
8466See Also: [`unboxed_closures`](../language-features/unboxed-closures.md)
8467
8468[#29625]: https://github.com/rust-lang/rust/issues/29625
8469
8470----
8471
8472The `fn_traits` feature allows for implementation of the [`Fn*`] traits
8473for creating custom closure-like types.
8474
8475[`Fn*`]: ../../std/ops/trait.Fn.html
8476
8477```rust
8478#![feature(unboxed_closures)]
8479#![feature(fn_traits)]
8480
8481struct Adder {
8482    a: u32
8483}
8484
8485impl FnOnce<(u32, )> for Adder {
8486    type Output = u32;
8487    extern "rust-call" fn call_once(self, b: (u32, )) -> Self::Output {
8488        self.a + b.0
8489    }
8490}
8491
8492fn main() {
8493    let adder = Adder { a: 3 };
8494    assert_eq!(adder(2), 5);
8495}
8496```
8497"##,
8498        default_severity: Severity::Allow,
8499        warn_since: None,
8500        deny_since: None,
8501    },
8502    Lint {
8503        label: "forget_unsized",
8504        description: r##"# `forget_unsized`
8505
8506
8507
8508This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
8509
8510------------------------
8511"##,
8512        default_severity: Severity::Allow,
8513        warn_since: None,
8514        deny_since: None,
8515    },
8516    Lint {
8517        label: "format_args_nl",
8518        description: r##"# `format_args_nl`
8519
8520
8521
8522This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
8523
8524------------------------
8525"##,
8526        default_severity: Severity::Allow,
8527        warn_since: None,
8528        deny_since: None,
8529    },
8530    Lint {
8531        label: "formatting_options",
8532        description: r##"# `formatting_options`
8533
8534
8535
8536The tracking issue for this feature is: [#118117]
8537
8538[#118117]: https://github.com/rust-lang/rust/issues/118117
8539
8540------------------------
8541"##,
8542        default_severity: Severity::Allow,
8543        warn_since: None,
8544        deny_since: None,
8545    },
8546    Lint {
8547        label: "freeze",
8548        description: r##"# `freeze`
8549
8550
8551
8552The tracking issue for this feature is: [#121675]
8553
8554[#121675]: https://github.com/rust-lang/rust/issues/121675
8555
8556------------------------
8557"##,
8558        default_severity: Severity::Allow,
8559        warn_since: None,
8560        deny_since: None,
8561    },
8562    Lint {
8563        label: "freeze_impls",
8564        description: r##"# `freeze_impls`
8565
8566Allows impls for the Freeze trait.
8567
8568The tracking issue for this feature is: [#121675]
8569
8570[#121675]: https://github.com/rust-lang/rust/issues/121675
8571
8572------------------------
8573"##,
8574        default_severity: Severity::Allow,
8575        warn_since: None,
8576        deny_since: None,
8577    },
8578    Lint {
8579        label: "frontmatter",
8580        description: r##"# `frontmatter`
8581
8582The tracking issue for this feature is: [#136889]
8583
8584------
8585
8586The `frontmatter` feature allows an extra metadata block at the top of files for consumption by
8587external tools. For example, it can be used by [`cargo-script`] files to specify dependencies.
8588
8589```rust
8590#!/usr/bin/env -S cargo -Zscript
8591---
8592[dependencies]
8593libc = "0.2.172"
8594---
8595#![feature(frontmatter)]
8596# mod libc { pub type c_int = i32; }
8597
8598fn main() {
8599    let x: libc::c_int = 1i32;
8600}
8601```
8602
8603[#136889]: https://github.com/rust-lang/rust/issues/136889
8604[`cargo-script`]: https://rust-lang.github.io/rfcs/3502-cargo-script.html
8605"##,
8606        default_severity: Severity::Allow,
8607        warn_since: None,
8608        deny_since: None,
8609    },
8610    Lint {
8611        label: "fs_set_times",
8612        description: r##"# `fs_set_times`
8613
8614
8615
8616The tracking issue for this feature is: [#147455]
8617
8618[#147455]: https://github.com/rust-lang/rust/issues/147455
8619
8620------------------------
8621"##,
8622        default_severity: Severity::Allow,
8623        warn_since: None,
8624        deny_since: None,
8625    },
8626    Lint {
8627        label: "fundamental",
8628        description: r##"# `fundamental`
8629
8630Allows using the `#[fundamental]` attribute.
8631
8632The tracking issue for this feature is: [#29635]
8633
8634[#29635]: https://github.com/rust-lang/rust/issues/29635
8635
8636------------------------
8637"##,
8638        default_severity: Severity::Allow,
8639        warn_since: None,
8640        deny_since: None,
8641    },
8642    Lint {
8643        label: "funnel_shifts",
8644        description: r##"# `funnel_shifts`
8645
8646
8647
8648The tracking issue for this feature is: [#145686]
8649
8650[#145686]: https://github.com/rust-lang/rust/issues/145686
8651
8652------------------------
8653"##,
8654        default_severity: Severity::Allow,
8655        warn_since: None,
8656        deny_since: None,
8657    },
8658    Lint {
8659        label: "future_join",
8660        description: r##"# `future_join`
8661
8662
8663
8664The tracking issue for this feature is: [#91642]
8665
8666[#91642]: https://github.com/rust-lang/rust/issues/91642
8667
8668------------------------
8669"##,
8670        default_severity: Severity::Allow,
8671        warn_since: None,
8672        deny_since: None,
8673    },
8674    Lint {
8675        label: "gen_blocks",
8676        description: r##"# `gen_blocks`
8677
8678Allows defining gen blocks and `gen fn`.
8679
8680The tracking issue for this feature is: [#117078]
8681
8682[#117078]: https://github.com/rust-lang/rust/issues/117078
8683
8684------------------------
8685"##,
8686        default_severity: Severity::Allow,
8687        warn_since: None,
8688        deny_since: None,
8689    },
8690    Lint {
8691        label: "gen_future",
8692        description: r##"# `gen_future`
8693
8694
8695
8696This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
8697
8698------------------------
8699"##,
8700        default_severity: Severity::Allow,
8701        warn_since: None,
8702        deny_since: None,
8703    },
8704    Lint {
8705        label: "generic_assert",
8706        description: r##"# `generic_assert`
8707
8708Outputs useful `assert!` messages
8709
8710This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
8711
8712------------------------
8713"##,
8714        default_severity: Severity::Allow,
8715        warn_since: None,
8716        deny_since: None,
8717    },
8718    Lint {
8719        label: "generic_assert_internals",
8720        description: r##"# `generic_assert_internals`
8721
8722
8723
8724The tracking issue for this feature is: [#44838]
8725
8726[#44838]: https://github.com/rust-lang/rust/issues/44838
8727
8728------------------------
8729"##,
8730        default_severity: Severity::Allow,
8731        warn_since: None,
8732        deny_since: None,
8733    },
8734    Lint {
8735        label: "generic_atomic",
8736        description: r##"# `generic_atomic`
8737
8738
8739
8740The tracking issue for this feature is: [#130539]
8741
8742[#130539]: https://github.com/rust-lang/rust/issues/130539
8743
8744------------------------
8745"##,
8746        default_severity: Severity::Allow,
8747        warn_since: None,
8748        deny_since: None,
8749    },
8750    Lint {
8751        label: "generic_const_args",
8752        description: r##"# generic_const_args
8753
8754Allows using generics in more complex const expressions, based on definitional equality.
8755
8756The tracking issue for this feature is: [#151972]
8757
8758[#151972]: https://github.com/rust-lang/rust/issues/151972
8759
8760------------------------
8761
8762Warning: This feature is incomplete; its design and syntax may change.
8763
8764This feature enables many of the same use cases supported by [generic_const_exprs],
8765but based on the machinery developed for [min_generic_const_args]. In a way, it is
8766meant to be an interim successor for GCE (though it might not currently support all
8767the valid cases that supported by GCE).
8768
8769See also: [generic_const_items]
8770
8771[min_generic_const_args]: min-generic-const-args.md
8772[generic_const_exprs]: generic-const-exprs.md
8773[generic_const_items]: generic-const-items.md
8774
8775## Examples
8776
8777<!-- NOTE(ignore) generic_const_args requires -Znext-solver to compile -->
8778```rust,ignore (requires-Z-next-solver)
8779#![feature(generic_const_items)]
8780#![feature(min_generic_const_args)]
8781#![feature(generic_const_args)]
8782#![expect(incomplete_features)]
8783
8784type const ADD1<const N: usize>: usize = const { N + 1 };
8785
8786type const INC<const N: usize>: usize = ADD1::<N>;
8787
8788const ARR: [(); ADD1::<0>] = [(); INC::<0>];
8789```
8790"##,
8791        default_severity: Severity::Allow,
8792        warn_since: None,
8793        deny_since: None,
8794    },
8795    Lint {
8796        label: "generic_const_exprs",
8797        description: r##"# generic_const_exprs
8798
8799Allows non-trivial generic constants which have to be shown to successfully evaluate
8800to a value by being part of an item signature.
8801
8802The tracking issue for this feature is: [#76560]
8803
8804
8805[#76560]: https://github.com/rust-lang/rust/issues/76560
8806
8807------------------------
8808
8809Warning: This feature is incomplete; its design and syntax may change.
8810
8811See also: [min_generic_const_args], [generic_const_args]
8812
8813[min_generic_const_args]: min-generic-const-args.md
8814[generic_const_args]: generic-const-args.md
8815
8816## Examples
8817
8818```rust
8819#![allow(incomplete_features)]
8820#![feature(generic_const_exprs)]
8821
8822// Use parameters that depend on a generic argument.
8823struct Foo<const N: usize>
8824where
8825    [(); N + 1]:,
8826{
8827    array: [usize; N + 1],
8828}
8829
8830// Use generic parameters in const operations.
8831trait Bar {
8832    const X: usize;
8833    const Y: usize;
8834}
8835
8836// Note `B::X * B::Y`.
8837const fn baz<B: Bar>(x: [usize; B::X], y: [usize; B::Y]) -> [usize; B::X * B::Y] {
8838    let mut out = [0; B::X * B::Y];
8839    let mut i = 0;
8840    while i < B::Y {
8841        let mut j = 0;
8842        while j < B::X {
8843            out[i * B::X + j] = y[i].saturating_mul(x[j]);
8844            j += 1;
8845        }
8846        i += 1;
8847    }
8848    out
8849}
8850
8851
8852// Create a new type based on a generic argument.
8853pub struct Grow<const N: usize> {
8854    arr: [usize; N],
8855}
8856
8857impl<const N: usize> Grow<N> {
8858    pub const fn grow(self, val: usize) -> Grow<{ N + 1 }> {
8859        let mut new_arr = [0; { N + 1 }];
8860        let mut idx = 0;
8861        while idx < N {
8862            new_arr[idx] = self.arr[idx];
8863            idx += 1;
8864        }
8865        new_arr[N] = val;
8866        Grow { arr: new_arr }
8867    }
8868}
8869```
8870"##,
8871        default_severity: Severity::Allow,
8872        warn_since: None,
8873        deny_since: None,
8874    },
8875    Lint {
8876        label: "generic_const_items",
8877        description: r##"# generic_const_items
8878
8879Allows generic parameters and where-clauses on free & associated const items.
8880
8881The tracking issue for this feature is: [#113521]
8882
8883[#113521]: https://github.com/rust-lang/rust/issues/113521
8884
8885------------------------
8886
8887Warning: This feature is an [experiment] and lacks an RFC.
8888There are no guarantees that it will ever be stabilized.
8889
8890See also: [generic_const_exprs], [min_generic_const_args].
8891
8892[experiment]: https://lang-team.rust-lang.org/how_to/experiment.html
8893[generic_const_exprs]: generic-const-exprs.md
8894[min_generic_const_args]: min-generic-const-args.md
8895
8896## Examples
8897
8898### Generic constant values
8899
8900```rust
8901#![allow(incomplete_features)]
8902#![feature(generic_const_items)]
8903
8904const GENERIC_VAL<const ARG: usize>: usize = ARG + 1;
8905
8906#[test]
8907fn generic_const_arg() {
8908    assert_eq!(GENERIC_VAL::<1>, 2);
8909    assert_eq!(GENERIC_VAL::<2>, 3);
8910}
8911```
8912
8913### Conditional constants
8914
8915```rust
8916#![allow(incomplete_features)]
8917#![feature(generic_const_items)]
8918
8919// `GENERIC_VAL::<0>` will fail to compile
8920const GENERIC_VAL<const ARG: usize>: usize = if ARG > 0 { ARG + 1 } else { panic!("0 value") };
8921
8922// Will fail to compile if the `Copy` derive is removed.
8923const COPY_MARKER<C: Copy>: () = ();
8924
8925#[derive(Clone, Copy)]
8926struct Foo;
8927
8928const FOO_IS_COPY: () = COPY_MARKER::<Foo>;
8929```
8930"##,
8931        default_severity: Severity::Allow,
8932        warn_since: None,
8933        deny_since: None,
8934    },
8935    Lint {
8936        label: "generic_const_parameter_types",
8937        description: r##"# `generic_const_parameter_types`
8938
8939Allows the type of const generics to depend on generic parameters
8940
8941The tracking issue for this feature is: [#137626]
8942
8943[#137626]: https://github.com/rust-lang/rust/issues/137626
8944
8945------------------------
8946"##,
8947        default_severity: Severity::Allow,
8948        warn_since: None,
8949        deny_since: None,
8950    },
8951    Lint {
8952        label: "generic_pattern_types",
8953        description: r##"# `generic_pattern_types`
8954
8955Allows any generic constants being used as pattern type range ends
8956
8957The tracking issue for this feature is: [#136574]
8958
8959[#136574]: https://github.com/rust-lang/rust/issues/136574
8960
8961------------------------
8962"##,
8963        default_severity: Severity::Allow,
8964        warn_since: None,
8965        deny_since: None,
8966    },
8967    Lint {
8968        label: "get_disjoint_mut_helpers",
8969        description: r##"# `get_disjoint_mut_helpers`
8970
8971
8972
8973This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
8974
8975------------------------
8976"##,
8977        default_severity: Severity::Allow,
8978        warn_since: None,
8979        deny_since: None,
8980    },
8981    Lint {
8982        label: "get_mut_unchecked",
8983        description: r##"# `get_mut_unchecked`
8984
8985
8986
8987The tracking issue for this feature is: [#63292]
8988
8989[#63292]: https://github.com/rust-lang/rust/issues/63292
8990
8991------------------------
8992"##,
8993        default_severity: Severity::Allow,
8994        warn_since: None,
8995        deny_since: None,
8996    },
8997    Lint {
8998        label: "gethostname",
8999        description: r##"# `gethostname`
9000
9001
9002
9003The tracking issue for this feature is: [#135142]
9004
9005[#135142]: https://github.com/rust-lang/rust/issues/135142
9006
9007------------------------
9008"##,
9009        default_severity: Severity::Allow,
9010        warn_since: None,
9011        deny_since: None,
9012    },
9013    Lint {
9014        label: "global_registration",
9015        description: r##"# `global_registration`
9016
9017Allows registering static items globally, possibly across crates, to iterate over at runtime.
9018
9019The tracking issue for this feature is: [#125119]
9020
9021[#125119]: https://github.com/rust-lang/rust/issues/125119
9022
9023------------------------
9024"##,
9025        default_severity: Severity::Allow,
9026        warn_since: None,
9027        deny_since: None,
9028    },
9029    Lint {
9030        label: "gpu_intrinsics",
9031        description: r##"# `gpu_intrinsics`
9032
9033
9034
9035This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
9036
9037------------------------
9038"##,
9039        default_severity: Severity::Allow,
9040        warn_since: None,
9041        deny_since: None,
9042    },
9043    Lint {
9044        label: "gpu_launch_sized_workgroup_mem",
9045        description: r##"# `gpu_launch_sized_workgroup_mem`
9046
9047
9048
9049The tracking issue for this feature is: [#135513]
9050
9051[#135513]: https://github.com/rust-lang/rust/issues/135513
9052
9053------------------------
9054"##,
9055        default_severity: Severity::Allow,
9056        warn_since: None,
9057        deny_since: None,
9058    },
9059    Lint {
9060        label: "guard_patterns",
9061        description: r##"# `guard_patterns`
9062
9063Allows using guards in patterns.
9064
9065The tracking issue for this feature is: [#129967]
9066
9067[#129967]: https://github.com/rust-lang/rust/issues/129967
9068
9069------------------------
9070"##,
9071        default_severity: Severity::Allow,
9072        warn_since: None,
9073        deny_since: None,
9074    },
9075    Lint {
9076        label: "half_open_range_patterns_in_slices",
9077        description: r##"# `half_open_range_patterns_in_slices`
9078
9079The tracking issue for this feature is: [#67264]
9080It is a future part of the `exclusive_range_pattern` feature,
9081tracked at [#37854].
9082
9083[#67264]: https://github.com/rust-lang/rust/issues/67264
9084[#37854]: https://github.com/rust-lang/rust/issues/37854
9085-----
9086
9087This feature allow using top-level half-open range patterns in slices.
9088
9089```rust
9090#![feature(half_open_range_patterns_in_slices)]
9091
9092fn main() {
9093    let xs = [13, 1, 5, 2, 3, 1, 21, 8];
9094    let [a @ 3.., b @ ..3, c @ 4..6, ..] = xs else { return; };
9095}
9096```
9097
9098Note that this feature is not required if the patterns are wrapped between parenthesis.
9099
9100```rust
9101fn main() {
9102    let xs = [13, 1];
9103    let [(a @ 3..), c] = xs else { return; };
9104}
9105```
9106"##,
9107        default_severity: Severity::Allow,
9108        warn_since: None,
9109        deny_since: None,
9110    },
9111    Lint {
9112        label: "hash_map_internals",
9113        description: r##"# `hash_map_internals`
9114
9115
9116
9117This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
9118
9119------------------------
9120"##,
9121        default_severity: Severity::Allow,
9122        warn_since: None,
9123        deny_since: None,
9124    },
9125    Lint {
9126        label: "hash_map_macro",
9127        description: r##"# `hash_map_macro`
9128
9129
9130
9131The tracking issue for this feature is: [#144032]
9132
9133[#144032]: https://github.com/rust-lang/rust/issues/144032
9134
9135------------------------
9136"##,
9137        default_severity: Severity::Allow,
9138        warn_since: None,
9139        deny_since: None,
9140    },
9141    Lint {
9142        label: "hash_set_entry",
9143        description: r##"# `hash_set_entry`
9144
9145
9146
9147The tracking issue for this feature is: [#60896]
9148
9149[#60896]: https://github.com/rust-lang/rust/issues/60896
9150
9151------------------------
9152"##,
9153        default_severity: Severity::Allow,
9154        warn_since: None,
9155        deny_since: None,
9156    },
9157    Lint {
9158        label: "hasher_prefixfree_extras",
9159        description: r##"# `hasher_prefixfree_extras`
9160
9161
9162
9163The tracking issue for this feature is: [#96762]
9164
9165[#96762]: https://github.com/rust-lang/rust/issues/96762
9166
9167------------------------
9168"##,
9169        default_severity: Severity::Allow,
9170        warn_since: None,
9171        deny_since: None,
9172    },
9173    Lint {
9174        label: "hashmap_internals",
9175        description: r##"# `hashmap_internals`
9176
9177
9178
9179This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
9180
9181------------------------
9182"##,
9183        default_severity: Severity::Allow,
9184        warn_since: None,
9185        deny_since: None,
9186    },
9187    Lint {
9188        label: "hexagon_target_feature",
9189        description: r##"# `hexagon_target_feature`
9190
9191Target features on hexagon.
9192
9193The tracking issue for this feature is: [#150250]
9194
9195[#150250]: https://github.com/rust-lang/rust/issues/150250
9196
9197------------------------
9198"##,
9199        default_severity: Severity::Allow,
9200        warn_since: None,
9201        deny_since: None,
9202    },
9203    Lint {
9204        label: "hint_must_use",
9205        description: r##"# `hint_must_use`
9206
9207
9208
9209The tracking issue for this feature is: [#94745]
9210
9211[#94745]: https://github.com/rust-lang/rust/issues/94745
9212
9213------------------------
9214"##,
9215        default_severity: Severity::Allow,
9216        warn_since: None,
9217        deny_since: None,
9218    },
9219    Lint {
9220        label: "hint_prefetch",
9221        description: r##"# `hint_prefetch`
9222
9223
9224
9225The tracking issue for this feature is: [#146941]
9226
9227[#146941]: https://github.com/rust-lang/rust/issues/146941
9228
9229------------------------
9230"##,
9231        default_severity: Severity::Allow,
9232        warn_since: None,
9233        deny_since: None,
9234    },
9235    Lint {
9236        label: "impl_restriction",
9237        description: r##"# `impl_restriction`
9238
9239Allows `impl(crate) trait Foo` restrictions.
9240
9241The tracking issue for this feature is: [#105077]
9242
9243[#105077]: https://github.com/rust-lang/rust/issues/105077
9244
9245------------------------
9246"##,
9247        default_severity: Severity::Allow,
9248        warn_since: None,
9249        deny_since: None,
9250    },
9251    Lint {
9252        label: "impl_trait_in_assoc_type",
9253        description: r##"# `impl_trait_in_assoc_type`
9254
9255Allows `impl Trait` to be used inside associated types (RFC 2515).
9256
9257The tracking issue for this feature is: [#63063]
9258
9259[#63063]: https://github.com/rust-lang/rust/issues/63063
9260
9261------------------------
9262"##,
9263        default_severity: Severity::Allow,
9264        warn_since: None,
9265        deny_since: None,
9266    },
9267    Lint {
9268        label: "impl_trait_in_bindings",
9269        description: r##"# `impl_trait_in_bindings`
9270
9271Allows `impl Trait` in bindings (`let`).
9272
9273The tracking issue for this feature is: [#63065]
9274
9275[#63065]: https://github.com/rust-lang/rust/issues/63065
9276
9277------------------------
9278"##,
9279        default_severity: Severity::Allow,
9280        warn_since: None,
9281        deny_since: None,
9282    },
9283    Lint {
9284        label: "impl_trait_in_fn_trait_return",
9285        description: r##"# `impl_trait_in_fn_trait_return`
9286
9287Allows `impl Trait` as output type in `Fn` traits in return position of functions.
9288
9289The tracking issue for this feature is: [#99697]
9290
9291[#99697]: https://github.com/rust-lang/rust/issues/99697
9292
9293------------------------
9294"##,
9295        default_severity: Severity::Allow,
9296        warn_since: None,
9297        deny_since: None,
9298    },
9299    Lint {
9300        label: "import_trait_associated_functions",
9301        description: r##"# import_trait_associated_functions
9302
9303The tracking issue for this feature is: [#134691]
9304
9305[#134691]: https://github.com/rust-lang/rust/issues/134691
9306
9307------------------------
9308
9309This feature allows importing associated functions and constants from traits and then using them like regular items.
9310
9311```rust
9312#![feature(import_trait_associated_functions)]
9313
9314use std::ops::Add::add;
9315
9316fn main() {
9317    let numbers = vec![1, 2, 3, 4, 5, 6];
9318    let sum = numbers.into_iter().reduce(add); // instead of `.reduce(Add:add)`
9319
9320    assert_eq!(sum, Some(21));
9321}
9322```
9323"##,
9324        default_severity: Severity::Allow,
9325        warn_since: None,
9326        deny_since: None,
9327    },
9328    Lint {
9329        label: "inherent_associated_types",
9330        description: r##"# `inherent_associated_types`
9331
9332Allows associated types in inherent impls.
9333
9334The tracking issue for this feature is: [#8995]
9335
9336[#8995]: https://github.com/rust-lang/rust/issues/8995
9337
9338------------------------
9339"##,
9340        default_severity: Severity::Allow,
9341        warn_since: None,
9342        deny_since: None,
9343    },
9344    Lint {
9345        label: "inplace_iteration",
9346        description: r##"# `inplace_iteration`
9347
9348
9349
9350This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
9351
9352------------------------
9353"##,
9354        default_severity: Severity::Allow,
9355        warn_since: None,
9356        deny_since: None,
9357    },
9358    Lint {
9359        label: "int_format_into",
9360        description: r##"# `int_format_into`
9361
9362
9363
9364The tracking issue for this feature is: [#138215]
9365
9366[#138215]: https://github.com/rust-lang/rust/issues/138215
9367
9368------------------------
9369"##,
9370        default_severity: Severity::Allow,
9371        warn_since: None,
9372        deny_since: None,
9373    },
9374    Lint {
9375        label: "int_from_ascii",
9376        description: r##"# `int_from_ascii`
9377
9378
9379
9380The tracking issue for this feature is: [#134821]
9381
9382[#134821]: https://github.com/rust-lang/rust/issues/134821
9383
9384------------------------
9385"##,
9386        default_severity: Severity::Allow,
9387        warn_since: None,
9388        deny_since: None,
9389    },
9390    Lint {
9391        label: "int_roundings",
9392        description: r##"# `int_roundings`
9393
9394
9395
9396The tracking issue for this feature is: [#88581]
9397
9398[#88581]: https://github.com/rust-lang/rust/issues/88581
9399
9400------------------------
9401"##,
9402        default_severity: Severity::Allow,
9403        warn_since: None,
9404        deny_since: None,
9405    },
9406    Lint {
9407        label: "integer_atomics",
9408        description: r##"# `integer_atomics`
9409
9410
9411
9412The tracking issue for this feature is: [#99069]
9413
9414[#99069]: https://github.com/rust-lang/rust/issues/99069
9415
9416------------------------
9417"##,
9418        default_severity: Severity::Allow,
9419        warn_since: None,
9420        deny_since: None,
9421    },
9422    Lint {
9423        label: "integer_cast_extras",
9424        description: r##"# `integer_cast_extras`
9425
9426
9427
9428The tracking issue for this feature is: [#154650]
9429
9430[#154650]: https://github.com/rust-lang/rust/issues/154650
9431
9432------------------------
9433"##,
9434        default_severity: Severity::Allow,
9435        warn_since: None,
9436        deny_since: None,
9437    },
9438    Lint {
9439        label: "integer_widen_truncate",
9440        description: r##"# `integer_widen_truncate`
9441
9442
9443
9444The tracking issue for this feature is: [#154330]
9445
9446[#154330]: https://github.com/rust-lang/rust/issues/154330
9447
9448------------------------
9449"##,
9450        default_severity: Severity::Allow,
9451        warn_since: None,
9452        deny_since: None,
9453    },
9454    Lint {
9455        label: "internal_output_capture",
9456        description: r##"# `internal_output_capture`
9457
9458This feature is internal to the Rust compiler and is not intended for general use.
9459
9460------------------------
9461"##,
9462        default_severity: Severity::Allow,
9463        warn_since: None,
9464        deny_since: None,
9465    },
9466    Lint {
9467        label: "intra_doc_pointers",
9468        description: r##"# `intra-doc-pointers`
9469
9470The tracking issue for this feature is: [#80896]
9471
9472[#80896]: https://github.com/rust-lang/rust/issues/80896
9473
9474------------------------
9475
9476Rustdoc does not currently allow disambiguating between `*const` and `*mut`, and
9477raw pointers in intra-doc links are unstable until it does.
9478
9479```rust
9480#![feature(intra_doc_pointers)]
9481//! [pointer::add]
9482```
9483"##,
9484        default_severity: Severity::Allow,
9485        warn_since: None,
9486        deny_since: None,
9487    },
9488    Lint {
9489        label: "intrinsics",
9490        description: r##"# `intrinsics`
9491
9492The tracking issue for this feature is: None.
9493
9494Intrinsics are rarely intended to be stable directly, but are usually
9495exported in some sort of stable manner. Prefer using the stable interfaces to
9496the intrinsic directly when you can.
9497
9498------------------------
9499
9500
9501## Intrinsics with fallback logic
9502
9503Many intrinsics can be written in pure rust, albeit inefficiently or without supporting
9504some features that only exist on some backends. Backends can simply not implement those
9505intrinsics without causing any code miscompilations or failures to compile.
9506All intrinsic fallback bodies are automatically made cross-crate inlineable (like `#[inline]`)
9507by the codegen backend, but not the MIR inliner.
9508
9509```rust
9510#![feature(intrinsics)]
9511#![allow(internal_features)]
9512
9513#[rustc_intrinsic]
9514const unsafe fn const_deallocate(_ptr: *mut u8, _size: usize, _align: usize) {}
9515```
9516
9517Since these are just regular functions, it is perfectly ok to create the intrinsic twice:
9518
9519```rust
9520#![feature(intrinsics)]
9521#![allow(internal_features)]
9522
9523#[rustc_intrinsic]
9524const unsafe fn const_deallocate(_ptr: *mut u8, _size: usize, _align: usize) {}
9525
9526mod foo {
9527    #[rustc_intrinsic]
9528    const unsafe fn const_deallocate(_ptr: *mut u8, _size: usize, _align: usize) {
9529        panic!("noisy const dealloc")
9530    }
9531}
9532
9533```
9534
9535The behaviour on backends that override the intrinsic is exactly the same. On other
9536backends, the intrinsic behaviour depends on which implementation is called, just like
9537with any regular function.
9538
9539## Intrinsics lowered to MIR instructions
9540
9541Various intrinsics have native MIR operations that they correspond to. Instead of requiring
9542backends to implement both the intrinsic and the MIR operation, the `lower_intrinsics` pass
9543will convert the calls to the MIR operation. Backends do not need to know about these intrinsics
9544at all. These intrinsics only make sense without a body, and can be declared as a `#[rustc_intrinsic]`.
9545The body is never used as the lowering pass implements support for all backends, so we never have to
9546use the fallback logic.
9547
9548## Intrinsics without fallback logic
9549
9550These must be implemented by all backends.
9551
9552### `#[rustc_intrinsic]` declarations
9553
9554These are written without a body:
9555```rust
9556#![feature(intrinsics)]
9557#![allow(internal_features)]
9558
9559#[rustc_intrinsic]
9560pub fn abort() -> !;
9561```
9562"##,
9563        default_severity: Severity::Allow,
9564        warn_since: None,
9565        deny_since: None,
9566    },
9567    Lint {
9568        label: "io_const_error",
9569        description: r##"# `io_const_error`
9570
9571
9572
9573The tracking issue for this feature is: [#133448]
9574
9575[#133448]: https://github.com/rust-lang/rust/issues/133448
9576
9577------------------------
9578"##,
9579        default_severity: Severity::Allow,
9580        warn_since: None,
9581        deny_since: None,
9582    },
9583    Lint {
9584        label: "io_const_error_internals",
9585        description: r##"# `io_const_error_internals`
9586
9587
9588
9589This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
9590
9591------------------------
9592"##,
9593        default_severity: Severity::Allow,
9594        warn_since: None,
9595        deny_since: None,
9596    },
9597    Lint {
9598        label: "io_error_inprogress",
9599        description: r##"# `io_error_inprogress`
9600
9601
9602
9603The tracking issue for this feature is: [#130840]
9604
9605[#130840]: https://github.com/rust-lang/rust/issues/130840
9606
9607------------------------
9608"##,
9609        default_severity: Severity::Allow,
9610        warn_since: None,
9611        deny_since: None,
9612    },
9613    Lint {
9614        label: "io_error_more",
9615        description: r##"# `io_error_more`
9616
9617
9618
9619The tracking issue for this feature is: [#86442]
9620
9621[#86442]: https://github.com/rust-lang/rust/issues/86442
9622
9623------------------------
9624"##,
9625        default_severity: Severity::Allow,
9626        warn_since: None,
9627        deny_since: None,
9628    },
9629    Lint {
9630        label: "io_error_uncategorized",
9631        description: r##"# `io_error_uncategorized`
9632
9633
9634
9635This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
9636
9637------------------------
9638"##,
9639        default_severity: Severity::Allow,
9640        warn_since: None,
9641        deny_since: None,
9642    },
9643    Lint {
9644        label: "io_slice_as_bytes",
9645        description: r##"# `io_slice_as_bytes`
9646
9647
9648
9649The tracking issue for this feature is: [#132818]
9650
9651[#132818]: https://github.com/rust-lang/rust/issues/132818
9652
9653------------------------
9654"##,
9655        default_severity: Severity::Allow,
9656        warn_since: None,
9657        deny_since: None,
9658    },
9659    Lint {
9660        label: "ip",
9661        description: r##"# `ip`
9662
9663
9664
9665The tracking issue for this feature is: [#27709]
9666
9667[#27709]: https://github.com/rust-lang/rust/issues/27709
9668
9669------------------------
9670"##,
9671        default_severity: Severity::Allow,
9672        warn_since: None,
9673        deny_since: None,
9674    },
9675    Lint {
9676        label: "ip_as_octets",
9677        description: r##"# `ip_as_octets`
9678
9679
9680
9681The tracking issue for this feature is: [#137259]
9682
9683[#137259]: https://github.com/rust-lang/rust/issues/137259
9684
9685------------------------
9686"##,
9687        default_severity: Severity::Allow,
9688        warn_since: None,
9689        deny_since: None,
9690    },
9691    Lint {
9692        label: "ip_multicast_reserved",
9693        description: r##"# `ip_multicast_reserved`
9694
9695
9696
9697This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
9698
9699------------------------
9700"##,
9701        default_severity: Severity::Allow,
9702        warn_since: None,
9703        deny_since: None,
9704    },
9705    Lint {
9706        label: "is_ascii_octdigit",
9707        description: r##"# `is_ascii_octdigit`
9708
9709
9710
9711The tracking issue for this feature is: [#101288]
9712
9713[#101288]: https://github.com/rust-lang/rust/issues/101288
9714
9715------------------------
9716"##,
9717        default_severity: Severity::Allow,
9718        warn_since: None,
9719        deny_since: None,
9720    },
9721    Lint {
9722        label: "is_loongarch_feature_detected",
9723        description: r##"# `is_loongarch_feature_detected`
9724
9725
9726
9727The tracking issue for this feature is: [#117425]
9728
9729[#117425]: https://github.com/rust-lang/rust/issues/117425
9730
9731------------------------
9732"##,
9733        default_severity: Severity::Allow,
9734        warn_since: None,
9735        deny_since: None,
9736    },
9737    Lint {
9738        label: "is_riscv_feature_detected",
9739        description: r##"# `is_riscv_feature_detected`
9740
9741
9742
9743The tracking issue for this feature is: [#111192]
9744
9745[#111192]: https://github.com/rust-lang/rust/issues/111192
9746
9747------------------------
9748"##,
9749        default_severity: Severity::Allow,
9750        warn_since: None,
9751        deny_since: None,
9752    },
9753    Lint {
9754        label: "iter_advance_by",
9755        description: r##"# `iter_advance_by`
9756
9757
9758
9759The tracking issue for this feature is: [#77404]
9760
9761[#77404]: https://github.com/rust-lang/rust/issues/77404
9762
9763------------------------
9764"##,
9765        default_severity: Severity::Allow,
9766        warn_since: None,
9767        deny_since: None,
9768    },
9769    Lint {
9770        label: "iter_array_chunks",
9771        description: r##"# `iter_array_chunks`
9772
9773
9774
9775The tracking issue for this feature is: [#100450]
9776
9777[#100450]: https://github.com/rust-lang/rust/issues/100450
9778
9779------------------------
9780"##,
9781        default_severity: Severity::Allow,
9782        warn_since: None,
9783        deny_since: None,
9784    },
9785    Lint {
9786        label: "iter_collect_into",
9787        description: r##"# `iter_collect_into`
9788
9789
9790
9791The tracking issue for this feature is: [#94780]
9792
9793[#94780]: https://github.com/rust-lang/rust/issues/94780
9794
9795------------------------
9796"##,
9797        default_severity: Severity::Allow,
9798        warn_since: None,
9799        deny_since: None,
9800    },
9801    Lint {
9802        label: "iter_from_coroutine",
9803        description: r##"# `iter_from_coroutine`
9804
9805
9806
9807The tracking issue for this feature is: [#43122]
9808
9809[#43122]: https://github.com/rust-lang/rust/issues/43122
9810
9811------------------------
9812"##,
9813        default_severity: Severity::Allow,
9814        warn_since: None,
9815        deny_since: None,
9816    },
9817    Lint {
9818        label: "iter_intersperse",
9819        description: r##"# `iter_intersperse`
9820
9821
9822
9823The tracking issue for this feature is: [#79524]
9824
9825[#79524]: https://github.com/rust-lang/rust/issues/79524
9826
9827------------------------
9828"##,
9829        default_severity: Severity::Allow,
9830        warn_since: None,
9831        deny_since: None,
9832    },
9833    Lint {
9834        label: "iter_is_partitioned",
9835        description: r##"# `iter_is_partitioned`
9836
9837
9838
9839The tracking issue for this feature is: [#62544]
9840
9841[#62544]: https://github.com/rust-lang/rust/issues/62544
9842
9843------------------------
9844"##,
9845        default_severity: Severity::Allow,
9846        warn_since: None,
9847        deny_since: None,
9848    },
9849    Lint {
9850        label: "iter_macro",
9851        description: r##"# `iter_macro`
9852
9853
9854
9855The tracking issue for this feature is: [#142269]
9856
9857[#142269]: https://github.com/rust-lang/rust/issues/142269
9858
9859------------------------
9860"##,
9861        default_severity: Severity::Allow,
9862        warn_since: None,
9863        deny_since: None,
9864    },
9865    Lint {
9866        label: "iter_map_windows",
9867        description: r##"# `iter_map_windows`
9868
9869
9870
9871The tracking issue for this feature is: [#87155]
9872
9873[#87155]: https://github.com/rust-lang/rust/issues/87155
9874
9875------------------------
9876"##,
9877        default_severity: Severity::Allow,
9878        warn_since: None,
9879        deny_since: None,
9880    },
9881    Lint {
9882        label: "iter_next_chunk",
9883        description: r##"# `iter_next_chunk`
9884
9885
9886
9887The tracking issue for this feature is: [#98326]
9888
9889[#98326]: https://github.com/rust-lang/rust/issues/98326
9890
9891------------------------
9892"##,
9893        default_severity: Severity::Allow,
9894        warn_since: None,
9895        deny_since: None,
9896    },
9897    Lint {
9898        label: "iter_order_by",
9899        description: r##"# `iter_order_by`
9900
9901
9902
9903The tracking issue for this feature is: [#64295]
9904
9905[#64295]: https://github.com/rust-lang/rust/issues/64295
9906
9907------------------------
9908"##,
9909        default_severity: Severity::Allow,
9910        warn_since: None,
9911        deny_since: None,
9912    },
9913    Lint {
9914        label: "iter_partition_in_place",
9915        description: r##"# `iter_partition_in_place`
9916
9917
9918
9919The tracking issue for this feature is: [#62543]
9920
9921[#62543]: https://github.com/rust-lang/rust/issues/62543
9922
9923------------------------
9924"##,
9925        default_severity: Severity::Allow,
9926        warn_since: None,
9927        deny_since: None,
9928    },
9929    Lint {
9930        label: "iterator_try_collect",
9931        description: r##"# `iterator_try_collect`
9932
9933
9934
9935The tracking issue for this feature is: [#94047]
9936
9937[#94047]: https://github.com/rust-lang/rust/issues/94047
9938
9939------------------------
9940"##,
9941        default_severity: Severity::Allow,
9942        warn_since: None,
9943        deny_since: None,
9944    },
9945    Lint {
9946        label: "iterator_try_reduce",
9947        description: r##"# `iterator_try_reduce`
9948
9949
9950
9951The tracking issue for this feature is: [#87053]
9952
9953[#87053]: https://github.com/rust-lang/rust/issues/87053
9954
9955------------------------
9956"##,
9957        default_severity: Severity::Allow,
9958        warn_since: None,
9959        deny_since: None,
9960    },
9961    Lint {
9962        label: "junction_point",
9963        description: r##"# `junction_point`
9964
9965
9966
9967The tracking issue for this feature is: [#121709]
9968
9969[#121709]: https://github.com/rust-lang/rust/issues/121709
9970
9971------------------------
9972"##,
9973        default_severity: Severity::Allow,
9974        warn_since: None,
9975        deny_since: None,
9976    },
9977    Lint {
9978        label: "lahfsahf_target_feature",
9979        description: r##"# `lahfsahf_target_feature`
9980
9981lahfsahf target feature on x86.
9982
9983The tracking issue for this feature is: [#150251]
9984
9985[#150251]: https://github.com/rust-lang/rust/issues/150251
9986
9987------------------------
9988"##,
9989        default_severity: Severity::Allow,
9990        warn_since: None,
9991        deny_since: None,
9992    },
9993    Lint {
9994        label: "lang_items",
9995        description: r##"# `lang_items`
9996
9997The tracking issue for this feature is: None.
9998
9999------------------------
10000
10001The `rustc` compiler has certain pluggable operations, that is,
10002functionality that isn't hard-coded into the language, but is
10003implemented in libraries, with a special marker to tell the compiler
10004it exists. The marker is the attribute `#[lang = "..."]` and there are
10005various different values of `...`, i.e. various different 'lang
10006items'. Most of them can only be defined once.
10007
10008Lang items are loaded lazily by the compiler; e.g. if one never uses `Box`
10009then there is no need to define a function for `exchange_malloc`.
10010`rustc` will emit an error when an item is needed but not found in the current
10011crate or any that it depends on.
10012
10013Some features provided by lang items:
10014
10015- overloadable operators via traits: the traits corresponding to the
10016  `==`, `<`, dereferencing (`*`) and `+` (etc.) operators are all
10017  marked with lang items; those specific four are `eq`, `partial_ord`,
10018  `deref`/`deref_mut`, and `add` respectively.
10019- panicking: the `panic` and `panic_impl` lang items, among others.
10020- stack unwinding: the lang item `eh_personality` is a function used by the
10021  failure mechanisms of the compiler. This is often mapped to GCC's personality
10022  function (see the [`std` implementation][personality] for more information),
10023  but programs which don't trigger a panic can be assured that this function is
10024  never called. Additionally, a `eh_catch_typeinfo` static is needed for certain
10025  targets which implement Rust panics on top of C++ exceptions.
10026- the traits in `core::marker` used to indicate types of
10027  various kinds; e.g. lang items `sized`, `sync` and `copy`.
10028- memory allocation, see below.
10029
10030Most lang items are defined by `core`, but if you're trying to build
10031an executable without the `std` crate, you might run into the need
10032for lang item definitions.
10033
10034[personality]: https://github.com/rust-lang/rust/blob/HEAD/library/std/src/sys/personality/gcc.rs
10035
10036## Example: Implementing a `Box`
10037
10038`Box` pointers require two lang items: one for the type itself and one for
10039allocation. A freestanding program that uses the `Box` sugar for dynamic
10040allocations via `malloc` and `free`:
10041
10042```rust,ignore (libc-is-finicky)
10043#![feature(lang_items, core_intrinsics, rustc_private, panic_unwind, rustc_attrs)]
10044#![allow(internal_features)]
10045#![no_std]
10046#![no_main]
10047
10048extern crate libc;
10049extern crate unwind;
10050
10051use core::ffi::{c_int, c_void};
10052use core::intrinsics;
10053use core::panic::PanicInfo;
10054use core::ptr::NonNull;
10055
10056pub struct Global; // the global allocator
10057struct Unique<T>(NonNull<T>);
10058
10059#[lang = "owned_box"]
10060pub struct Box<T, A = Global>(Unique<T>, A);
10061
10062impl<T> Box<T> {
10063    pub fn new(x: T) -> Self {
10064        #[rustc_box]
10065        Box::new(x)
10066    }
10067}
10068
10069impl<T, A> Drop for Box<T, A> {
10070    fn drop(&mut self) {
10071        unsafe {
10072            libc::free(self.0.0.as_ptr() as *mut c_void);
10073        }
10074    }
10075}
10076
10077#[lang = "exchange_malloc"]
10078unsafe fn allocate(size: usize, _align: usize) -> *mut u8 {
10079    let p = libc::malloc(size) as *mut u8;
10080
10081    // Check if `malloc` failed:
10082    if p.is_null() {
10083        intrinsics::abort();
10084    }
10085
10086    p
10087}
10088
10089#[no_mangle]
10090extern "C" fn main(_argc: c_int, _argv: *const *const u8) -> c_int {
10091    let _x = Box::new(1);
10092
10093    0
10094}
10095
10096#[lang = "eh_personality"]
10097fn rust_eh_personality() {}
10098
10099#[panic_handler]
10100fn panic_handler(_info: &PanicInfo) -> ! { intrinsics::abort() }
10101```
10102
10103Note the use of `abort`: the `exchange_malloc` lang item is assumed to
10104return a valid pointer, and so needs to do the check internally.
10105
10106## List of all language items
10107
10108An up-to-date list of all language items can be found [here] in the compiler code.
10109
10110[here]: https://github.com/rust-lang/rust/blob/HEAD/compiler/rustc_hir/src/lang_items.rs
10111"##,
10112        default_severity: Severity::Allow,
10113        warn_since: None,
10114        deny_since: None,
10115    },
10116    Lint {
10117        label: "large_assignments",
10118        description: r##"# `large_assignments`
10119
10120Allows setting the threshold for the `large_assignments` lint.
10121
10122The tracking issue for this feature is: [#83518]
10123
10124[#83518]: https://github.com/rust-lang/rust/issues/83518
10125
10126------------------------
10127"##,
10128        default_severity: Severity::Allow,
10129        warn_since: None,
10130        deny_since: None,
10131    },
10132    Lint {
10133        label: "layout_for_ptr",
10134        description: r##"# `layout_for_ptr`
10135
10136
10137
10138The tracking issue for this feature is: [#69835]
10139
10140[#69835]: https://github.com/rust-lang/rust/issues/69835
10141
10142------------------------
10143"##,
10144        default_severity: Severity::Allow,
10145        warn_since: None,
10146        deny_since: None,
10147    },
10148    Lint {
10149        label: "lazy_cell_into_inner",
10150        description: r##"# `lazy_cell_into_inner`
10151
10152
10153
10154The tracking issue for this feature is: [#125623]
10155
10156[#125623]: https://github.com/rust-lang/rust/issues/125623
10157
10158------------------------
10159"##,
10160        default_severity: Severity::Allow,
10161        warn_since: None,
10162        deny_since: None,
10163    },
10164    Lint {
10165        label: "lazy_type_alias",
10166        description: r##"# `lazy_type_alias`
10167
10168Allow to have type alias types for inter-crate use.
10169
10170The tracking issue for this feature is: [#112792]
10171
10172[#112792]: https://github.com/rust-lang/rust/issues/112792
10173
10174------------------------
10175"##,
10176        default_severity: Severity::Allow,
10177        warn_since: None,
10178        deny_since: None,
10179    },
10180    Lint {
10181        label: "legacy_receiver_trait",
10182        description: r##"# `legacy_receiver_trait`
10183
10184
10185
10186This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
10187
10188------------------------
10189"##,
10190        default_severity: Severity::Allow,
10191        warn_since: None,
10192        deny_since: None,
10193    },
10194    Lint {
10195        label: "liballoc_internals",
10196        description: r##"# `liballoc_internals`
10197
10198
10199
10200This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
10201
10202------------------------
10203"##,
10204        default_severity: Severity::Allow,
10205        warn_since: None,
10206        deny_since: None,
10207    },
10208    Lint {
10209        label: "libstd_sys_internals",
10210        description: r##"# `libstd_sys_internals`
10211
10212This feature is internal to the Rust compiler and is not intended for general use.
10213
10214------------------------
10215"##,
10216        default_severity: Severity::Allow,
10217        warn_since: None,
10218        deny_since: None,
10219    },
10220    Lint {
10221        label: "likely_unlikely",
10222        description: r##"# `likely_unlikely`
10223
10224
10225
10226The tracking issue for this feature is: [#151619]
10227
10228[#151619]: https://github.com/rust-lang/rust/issues/151619
10229
10230------------------------
10231"##,
10232        default_severity: Severity::Allow,
10233        warn_since: None,
10234        deny_since: None,
10235    },
10236    Lint {
10237        label: "link_arg_attribute",
10238        description: r##"# `link_arg_attribute`
10239
10240The tracking issue for this feature is: [#99427]
10241
10242------
10243
10244The `link_arg_attribute` feature allows passing arguments into the linker
10245from inside of the source code. Order is preserved for link attributes as
10246they were defined on a single extern block:
10247
10248```rust,no_run
10249#![feature(link_arg_attribute)]
10250
10251#[link(kind = "link-arg", name = "--start-group")]
10252#[link(kind = "static", name = "c")]
10253#[link(kind = "static", name = "gcc")]
10254#[link(kind = "link-arg", name = "--end-group")]
10255extern "C" {}
10256```
10257
10258[#99427]: https://github.com/rust-lang/rust/issues/99427
10259"##,
10260        default_severity: Severity::Allow,
10261        warn_since: None,
10262        deny_since: None,
10263    },
10264    Lint {
10265        label: "link_cfg",
10266        description: r##"# `link_cfg`
10267
10268This feature is internal to the Rust compiler and is not intended for general use.
10269
10270------------------------
10271"##,
10272        default_severity: Severity::Allow,
10273        warn_since: None,
10274        deny_since: None,
10275    },
10276    Lint {
10277        label: "link_llvm_intrinsics",
10278        description: r##"# `link_llvm_intrinsics`
10279
10280Allows using `#[link_name="llvm.*"]`.
10281
10282The tracking issue for this feature is: [#29602]
10283
10284[#29602]: https://github.com/rust-lang/rust/issues/29602
10285
10286------------------------
10287"##,
10288        default_severity: Severity::Allow,
10289        warn_since: None,
10290        deny_since: None,
10291    },
10292    Lint {
10293        label: "linkage",
10294        description: r##"# `linkage`
10295
10296Allows using the `#[linkage = ".."]` attribute.
10297
10298The tracking issue for this feature is: [#29603]
10299
10300[#29603]: https://github.com/rust-lang/rust/issues/29603
10301
10302------------------------
10303"##,
10304        default_severity: Severity::Allow,
10305        warn_since: None,
10306        deny_since: None,
10307    },
10308    Lint {
10309        label: "linked_list_cursors",
10310        description: r##"# `linked_list_cursors`
10311
10312
10313
10314The tracking issue for this feature is: [#58533]
10315
10316[#58533]: https://github.com/rust-lang/rust/issues/58533
10317
10318------------------------
10319"##,
10320        default_severity: Severity::Allow,
10321        warn_since: None,
10322        deny_since: None,
10323    },
10324    Lint {
10325        label: "linked_list_remove",
10326        description: r##"# `linked_list_remove`
10327
10328
10329
10330The tracking issue for this feature is: [#69210]
10331
10332[#69210]: https://github.com/rust-lang/rust/issues/69210
10333
10334------------------------
10335"##,
10336        default_severity: Severity::Allow,
10337        warn_since: None,
10338        deny_since: None,
10339    },
10340    Lint {
10341        label: "linked_list_retain",
10342        description: r##"# `linked_list_retain`
10343
10344
10345
10346The tracking issue for this feature is: [#114135]
10347
10348[#114135]: https://github.com/rust-lang/rust/issues/114135
10349
10350------------------------
10351"##,
10352        default_severity: Severity::Allow,
10353        warn_since: None,
10354        deny_since: None,
10355    },
10356    Lint {
10357        label: "linux_pidfd",
10358        description: r##"# `linux_pidfd`
10359
10360
10361
10362The tracking issue for this feature is: [#82971]
10363
10364[#82971]: https://github.com/rust-lang/rust/issues/82971
10365
10366------------------------
10367"##,
10368        default_severity: Severity::Allow,
10369        warn_since: None,
10370        deny_since: None,
10371    },
10372    Lint {
10373        label: "local_key_cell_update",
10374        description: r##"# `local_key_cell_update`
10375
10376
10377
10378The tracking issue for this feature is: [#143989]
10379
10380[#143989]: https://github.com/rust-lang/rust/issues/143989
10381
10382------------------------
10383"##,
10384        default_severity: Severity::Allow,
10385        warn_since: None,
10386        deny_since: None,
10387    },
10388    Lint {
10389        label: "local_waker",
10390        description: r##"# `local_waker`
10391
10392
10393
10394The tracking issue for this feature is: [#118959]
10395
10396[#118959]: https://github.com/rust-lang/rust/issues/118959
10397
10398------------------------
10399"##,
10400        default_severity: Severity::Allow,
10401        warn_since: None,
10402        deny_since: None,
10403    },
10404    Lint {
10405        label: "lock_value_accessors",
10406        description: r##"# `lock_value_accessors`
10407
10408
10409
10410The tracking issue for this feature is: [#133407]
10411
10412[#133407]: https://github.com/rust-lang/rust/issues/133407
10413
10414------------------------
10415"##,
10416        default_severity: Severity::Allow,
10417        warn_since: None,
10418        deny_since: None,
10419    },
10420    Lint {
10421        label: "log_syntax",
10422        description: r##"# `log_syntax`
10423
10424
10425
10426The tracking issue for this feature is: [#29598]
10427
10428[#29598]: https://github.com/rust-lang/rust/issues/29598
10429
10430------------------------
10431"##,
10432        default_severity: Severity::Allow,
10433        warn_since: None,
10434        deny_since: None,
10435    },
10436    Lint {
10437        label: "loongarch_target_feature",
10438        description: r##"# `loongarch_target_feature`
10439
10440Target features on loongarch.
10441
10442The tracking issue for this feature is: [#150252]
10443
10444[#150252]: https://github.com/rust-lang/rust/issues/150252
10445
10446------------------------
10447"##,
10448        default_severity: Severity::Allow,
10449        warn_since: None,
10450        deny_since: None,
10451    },
10452    Lint {
10453        label: "loop_match",
10454        description: r##"# `loop_match`
10455
10456The tracking issue for this feature is: [#132306]
10457
10458[#132306]: https://github.com/rust-lang/rust/issues/132306
10459
10460------
10461
10462The `#[loop_match]` and `#[const_continue]` attributes can be used to improve the code
10463generation of logic that fits this shape:
10464
10465```ignore (pseudo-rust)
10466loop {
10467    state = 'blk: {
10468        match state {
10469            State::A => {
10470                break 'blk State::B
10471            }
10472            State::B => { /* ... */ }
10473            /* ... */
10474        }
10475    }
10476}
10477```
10478
10479Here the loop itself can be annotated with `#[loop_match]`, and any `break 'blk` with
10480`#[const_continue]` if the value is know at compile time:
10481
10482```ignore (pseudo-rust)
10483#[loop_match]
10484loop {
10485    state = 'blk: {
10486        match state {
10487            State::A => {
10488                #[const_continue]
10489                break 'blk State::B
10490            }
10491            State::B => { /* ... */ }
10492            /* ... */
10493        }
10494    }
10495}
10496```
10497
10498The observable behavior of this loop is exactly the same as without the extra attributes.
10499The difference is in the generated output: normally, when the state is `A`, control flow
10500moves from the `A` branch, back to the top of the loop, then to the `B` branch. With the
10501attributes, The `A` branch will immediately jump to the `B` branch.
10502
10503Removing the indirection can be beneficial for stack usage and branch prediction, and
10504enables other optimizations by clearly splitting out the control flow paths that your
10505program will actually use.
10506"##,
10507        default_severity: Severity::Allow,
10508        warn_since: None,
10509        deny_since: None,
10510    },
10511    Lint {
10512        label: "m68k_target_feature",
10513        description: r##"# `m68k_target_feature`
10514
10515Target features on m68k.
10516
10517The tracking issue for this feature is: [#134328]
10518
10519[#134328]: https://github.com/rust-lang/rust/issues/134328
10520
10521------------------------
10522"##,
10523        default_severity: Severity::Allow,
10524        warn_since: None,
10525        deny_since: None,
10526    },
10527    Lint {
10528        label: "macro_attr",
10529        description: r##"# `macro_attr`
10530
10531Allow `macro_rules!` attribute rules
10532
10533The tracking issue for this feature is: [#143547]
10534
10535[#143547]: https://github.com/rust-lang/rust/issues/143547
10536
10537------------------------
10538"##,
10539        default_severity: Severity::Allow,
10540        warn_since: None,
10541        deny_since: None,
10542    },
10543    Lint {
10544        label: "macro_derive",
10545        description: r##"# `macro_derive`
10546
10547Allow `macro_rules!` derive rules
10548
10549The tracking issue for this feature is: [#143549]
10550
10551[#143549]: https://github.com/rust-lang/rust/issues/143549
10552
10553------------------------
10554"##,
10555        default_severity: Severity::Allow,
10556        warn_since: None,
10557        deny_since: None,
10558    },
10559    Lint {
10560        label: "macro_guard_matcher",
10561        description: r##"# `macro_guard_matcher`
10562
10563Allow `$x:guard` matcher in macros
10564
10565The tracking issue for this feature is: [#153104]
10566
10567[#153104]: https://github.com/rust-lang/rust/issues/153104
10568
10569------------------------
10570"##,
10571        default_severity: Severity::Allow,
10572        warn_since: None,
10573        deny_since: None,
10574    },
10575    Lint {
10576        label: "macro_metavar_expr",
10577        description: r##"# `macro_metavar_expr`
10578
10579The tracking issue for this feature is: [#83527]
10580
10581------------------------
10582
10583> This feature is not to be confused with [`macro_metavar_expr_concat`].
10584
10585[`macro_metavar_expr_concat`]: ./macro-metavar-expr-concat.md
10586[#83527]: https://github.com/rust-lang/rust/issues/83527
10587"##,
10588        default_severity: Severity::Allow,
10589        warn_since: None,
10590        deny_since: None,
10591    },
10592    Lint {
10593        label: "macro_metavar_expr_concat",
10594        description: r##"# `macro_metavar_expr_concat`
10595
10596The tracking issue for this feature is: [#124225]
10597
10598------------------------
10599
10600In stable Rust, there is no way to create new identifiers by joining identifiers to literals or other identifiers without using procedural macros such as [`paste`].
10601 `#![feature(macro_metavar_expr_concat)]` introduces a way to do this, using the concat metavariable expression.
10602
10603> This feature uses the syntax from [`macro_metavar_expr`] but is otherwise
10604> independent. It replaces the since-removed unstable feature
10605> [`concat_idents`].
10606
10607> This is an experimental feature; it and its syntax will require a RFC before stabilization.
10608
10609
10610### Overview
10611
10612`#![feature(macro_metavar_expr_concat)]` provides the `concat` metavariable expression for creating new identifiers:
10613
10614```rust
10615#![feature(macro_metavar_expr_concat)]
10616
10617macro_rules! create_some_structs {
10618    ($name:ident) => {
10619        pub struct ${ concat(First, $name) };
10620        pub struct ${ concat(Second, $name) };
10621        pub struct ${ concat(Third, $name) };
10622    }
10623}
10624
10625create_some_structs!(Thing);
10626```
10627
10628This macro invocation expands to:
10629
10630```rust
10631pub struct FirstThing;
10632pub struct SecondThing;
10633pub struct ThirdThing;
10634```
10635
10636### Syntax
10637
10638This feature builds upon the metavariable expression syntax `${ .. }` as specified in [RFC 3086] ([`macro_metavar_expr`]).
10639 `concat` is available like `${ concat(items) }`, where `items` is a comma separated sequence of idents and/or literals.
10640
10641### Examples
10642
10643#### Create a function or method with a concatenated name
10644
10645```rust
10646#![feature(macro_metavar_expr_concat)]
10647
10648macro_rules! make_getter {
10649    ($name:ident, $field: ident, $ret:ty) => {
10650        impl $name {
10651            pub fn ${ concat(get_, $field) }(&self) -> &$ret {
10652                &self.$field
10653            }
10654        }
10655    }
10656}
10657
10658pub struct Thing {
10659    description: String,
10660}
10661
10662make_getter!(Thing, description, String);
10663```
10664
10665This expands to:
10666
10667```rust
10668pub struct Thing {
10669    description: String,
10670}
10671
10672impl Thing {
10673    pub fn get_description(&self) -> &String {
10674        &self.description
10675    }
10676}
10677```
10678
10679#### Create names for macro generated tests
10680
10681```rust
10682#![feature(macro_metavar_expr_concat)]
10683
10684macro_rules! test_math {
10685    ($integer:ident) => {
10686        #[test]
10687        fn ${ concat(test_, $integer, _, addition) } () {
10688            let a: $integer = 73;
10689            let b: $integer = 42;
10690            assert_eq!(a + b, 115)
10691        }
10692
10693        #[test]
10694        fn ${ concat(test_, $integer, _, subtraction) } () {
10695            let a: $integer = 73;
10696            let b: $integer = 42;
10697            assert_eq!(a - b, 31)
10698        }
10699    }
10700}
10701
10702test_math!(i32);
10703test_math!(u64);
10704test_math!(u128);
10705```
10706
10707Running this returns the following output:
10708
10709```text
10710running 6 tests
10711test test_i32_subtraction ... ok
10712test test_i32_addition ... ok
10713test test_u128_addition ... ok
10714test test_u128_subtraction ... ok
10715test test_u64_addition ... ok
10716test test_u64_subtraction ... ok
10717
10718test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
10719```
10720
10721[`paste`]: https://crates.io/crates/paste
10722[RFC 3086]: https://rust-lang.github.io/rfcs/3086-macro-metavar-expr.html
10723[`macro_metavar_expr`]: ../language-features/macro-metavar-expr.md
10724[`concat_idents`]: https://github.com/rust-lang/rust/issues/29599
10725[#124225]: https://github.com/rust-lang/rust/issues/124225
10726[declarative macros]: https://doc.rust-lang.org/stable/reference/macros-by-example.html
10727"##,
10728        default_severity: Severity::Allow,
10729        warn_since: None,
10730        deny_since: None,
10731    },
10732    Lint {
10733        label: "map_try_insert",
10734        description: r##"# `map_try_insert`
10735
10736
10737
10738The tracking issue for this feature is: [#82766]
10739
10740[#82766]: https://github.com/rust-lang/rust/issues/82766
10741
10742------------------------
10743"##,
10744        default_severity: Severity::Allow,
10745        warn_since: None,
10746        deny_since: None,
10747    },
10748    Lint {
10749        label: "mapped_lock_guards",
10750        description: r##"# `mapped_lock_guards`
10751
10752
10753
10754The tracking issue for this feature is: [#117108]
10755
10756[#117108]: https://github.com/rust-lang/rust/issues/117108
10757
10758------------------------
10759"##,
10760        default_severity: Severity::Allow,
10761        warn_since: None,
10762        deny_since: None,
10763    },
10764    Lint {
10765        label: "marker_trait_attr",
10766        description: r##"# `marker_trait_attr`
10767
10768The tracking issue for this feature is: [#29864]
10769
10770[#29864]: https://github.com/rust-lang/rust/issues/29864
10771
10772------------------------
10773
10774Normally, Rust keeps you from adding trait implementations that could
10775overlap with each other, as it would be ambiguous which to use.  This
10776feature, however, carves out an exception to that rule: a trait can
10777opt-in to having overlapping implementations, at the cost that those
10778implementations are not allowed to override anything (and thus the
10779trait itself cannot have any associated items, as they're pointless
10780when they'd need to do the same thing for every type anyway).
10781
10782```rust
10783#![feature(marker_trait_attr)]
10784
10785#[marker] trait CheapToClone: Clone {}
10786
10787impl<T: Copy> CheapToClone for T {}
10788
10789// These could potentially overlap with the blanket implementation above,
10790// so are only allowed because CheapToClone is a marker trait.
10791impl<T: CheapToClone, U: CheapToClone> CheapToClone for (T, U) {}
10792impl<T: CheapToClone> CheapToClone for std::ops::Range<T> {}
10793
10794fn cheap_clone<T: CheapToClone>(t: T) -> T {
10795    t.clone()
10796}
10797```
10798
10799This is expected to replace the unstable `overlapping_marker_traits`
10800feature, which applied to all empty traits (without needing an opt-in).
10801"##,
10802        default_severity: Severity::Allow,
10803        warn_since: None,
10804        deny_since: None,
10805    },
10806    Lint {
10807        label: "maybe_dangling",
10808        description: r##"# `maybe_dangling`
10809
10810
10811
10812The tracking issue for this feature is: [#118166]
10813
10814[#118166]: https://github.com/rust-lang/rust/issues/118166
10815
10816------------------------
10817"##,
10818        default_severity: Severity::Allow,
10819        warn_since: None,
10820        deny_since: None,
10821    },
10822    Lint {
10823        label: "maybe_uninit_array_assume_init",
10824        description: r##"# `maybe_uninit_array_assume_init`
10825
10826
10827
10828The tracking issue for this feature is: [#96097]
10829
10830[#96097]: https://github.com/rust-lang/rust/issues/96097
10831
10832------------------------
10833"##,
10834        default_severity: Severity::Allow,
10835        warn_since: None,
10836        deny_since: None,
10837    },
10838    Lint {
10839        label: "maybe_uninit_as_bytes",
10840        description: r##"# `maybe_uninit_as_bytes`
10841
10842
10843
10844The tracking issue for this feature is: [#93092]
10845
10846[#93092]: https://github.com/rust-lang/rust/issues/93092
10847
10848------------------------
10849"##,
10850        default_severity: Severity::Allow,
10851        warn_since: None,
10852        deny_since: None,
10853    },
10854    Lint {
10855        label: "maybe_uninit_fill",
10856        description: r##"# `maybe_uninit_fill`
10857
10858
10859
10860The tracking issue for this feature is: [#117428]
10861
10862[#117428]: https://github.com/rust-lang/rust/issues/117428
10863
10864------------------------
10865"##,
10866        default_severity: Severity::Allow,
10867        warn_since: None,
10868        deny_since: None,
10869    },
10870    Lint {
10871        label: "maybe_uninit_uninit_array_transpose",
10872        description: r##"# `maybe_uninit_uninit_array_transpose`
10873
10874
10875
10876The tracking issue for this feature is: [#96097]
10877
10878[#96097]: https://github.com/rust-lang/rust/issues/96097
10879
10880------------------------
10881"##,
10882        default_severity: Severity::Allow,
10883        warn_since: None,
10884        deny_since: None,
10885    },
10886    Lint {
10887        label: "mem_conjure_zst",
10888        description: r##"# `mem_conjure_zst`
10889
10890
10891
10892The tracking issue for this feature is: [#95383]
10893
10894[#95383]: https://github.com/rust-lang/rust/issues/95383
10895
10896------------------------
10897"##,
10898        default_severity: Severity::Allow,
10899        warn_since: None,
10900        deny_since: None,
10901    },
10902    Lint {
10903        label: "mem_copy_fn",
10904        description: r##"# `mem_copy_fn`
10905
10906
10907
10908The tracking issue for this feature is: [#98262]
10909
10910[#98262]: https://github.com/rust-lang/rust/issues/98262
10911
10912------------------------
10913"##,
10914        default_severity: Severity::Allow,
10915        warn_since: None,
10916        deny_since: None,
10917    },
10918    Lint {
10919        label: "mgca_type_const_syntax",
10920        description: r##"# `mgca_type_const_syntax`
10921
10922Enable mgca `type const` syntax before expansion.
10923
10924The tracking issue for this feature is: [#132980]
10925
10926[#132980]: https://github.com/rust-lang/rust/issues/132980
10927
10928------------------------
10929"##,
10930        default_severity: Severity::Allow,
10931        warn_since: None,
10932        deny_since: None,
10933    },
10934    Lint {
10935        label: "min_adt_const_params",
10936        description: r##"# `min_adt_const_params`
10937
10938Allows additional const parameter types, such as [u8; 10] or user defined types. User defined types must not have fields more private than the type itself.
10939
10940The tracking issue for this feature is: [#154042]
10941
10942[#154042]: https://github.com/rust-lang/rust/issues/154042
10943
10944------------------------
10945"##,
10946        default_severity: Severity::Allow,
10947        warn_since: None,
10948        deny_since: None,
10949    },
10950    Lint {
10951        label: "min_generic_const_args",
10952        description: r##"# min_generic_const_args
10953
10954Enables the generic const args MVP (paths to type const items and constructors for ADTs and primitives).
10955
10956The tracking issue for this feature is: [#132980]
10957
10958[#132980]: https://github.com/rust-lang/rust/issues/132980
10959
10960------------------------
10961
10962Warning: This feature is incomplete; its design and syntax may change.
10963
10964This feature acts as a minimal alternative to [generic_const_exprs] that allows a smaller subset of functionality,
10965and uses a different approach for implementation. It is intentionally more restrictive, which helps with avoiding edge
10966cases that make the `generic_const_exprs` hard to implement properly. See [Feature background][feature_background]
10967for more details.
10968
10969Related features: [generic_const_args], [generic_const_items].
10970
10971[feature_background]: https://github.com/rust-lang/project-const-generics/blob/main/documents/min_const_generics_plan.md
10972[generic_const_exprs]: generic-const-exprs.md
10973[generic_const_args]: generic-const-args.md
10974[generic_const_items]: generic-const-items.md
10975
10976## `type const` syntax
10977
10978This feature introduces new syntax: `type const`.
10979Constants marked as `type const` are allowed to be used in type contexts, e.g.:
10980
10981```compile_fail
10982#![allow(incomplete_features)]
10983#![feature(min_generic_const_args)]
10984
10985type const X: usize = 1;
10986const Y: usize = 1;
10987
10988struct Foo {
10989    good_arr: [(); X], // Allowed
10990    bad_arr: [(); Y], // Will not compile, `Y` must be `type const`.
10991}
10992```
10993
10994## Examples
10995
10996```rust
10997#![allow(incomplete_features)]
10998#![feature(min_generic_const_args)]
10999
11000trait Bar {
11001    type const VAL: usize;
11002    type const VAL2: usize;
11003}
11004
11005struct Baz;
11006
11007impl Bar for Baz {
11008    type const VAL: usize = 2;
11009    type const VAL2: usize = const { Self::VAL * 2 };
11010}
11011
11012struct Foo<B: Bar> {
11013    arr1: [usize; B::VAL],
11014    arr2: [usize; B::VAL2],
11015}
11016```
11017
11018Note that with [generic_const_exprs] the same example would look as follows:
11019
11020```rust
11021#![allow(incomplete_features)]
11022#![feature(generic_const_exprs)]
11023
11024trait Bar {
11025    const VAL: usize;
11026    const VAL2: usize;
11027}
11028
11029struct Baz;
11030
11031impl Bar for Baz {
11032    const VAL: usize = 2;
11033    const VAL2: usize = const { Self::VAL * 2 };
11034}
11035
11036struct Foo<B: Bar>
11037where
11038    [(); B::VAL]:,
11039    [(); B::VAL2]:,
11040{
11041    arr1: [usize; B::VAL],
11042    arr2: [usize; B::VAL2],
11043}
11044```
11045
11046Use of const functions is allowed:
11047
11048```rust
11049#![allow(incomplete_features)]
11050#![feature(min_generic_const_args)]
11051
11052const VAL: usize = 1;
11053
11054const fn inc(val: usize) -> usize {
11055    val + 1
11056}
11057
11058type const INC: usize = const { inc(VAL) };
11059
11060const ARR: [usize; INC] = [0; INC];
11061```
11062"##,
11063        default_severity: Severity::Allow,
11064        warn_since: None,
11065        deny_since: None,
11066    },
11067    Lint {
11068        label: "min_specialization",
11069        description: r##"# `min_specialization`
11070
11071A minimal, sound subset of specialization intended to be used by the standard library until the soundness issues with specialization are fixed.
11072
11073The tracking issue for this feature is: [#31844]
11074
11075[#31844]: https://github.com/rust-lang/rust/issues/31844
11076
11077------------------------
11078"##,
11079        default_severity: Severity::Allow,
11080        warn_since: None,
11081        deny_since: None,
11082    },
11083    Lint {
11084        label: "mips_target_feature",
11085        description: r##"# `mips_target_feature`
11086
11087Target features on mips.
11088
11089The tracking issue for this feature is: [#150253]
11090
11091[#150253]: https://github.com/rust-lang/rust/issues/150253
11092
11093------------------------
11094"##,
11095        default_severity: Severity::Allow,
11096        warn_since: None,
11097        deny_since: None,
11098    },
11099    Lint {
11100        label: "more_float_constants",
11101        description: r##"# `more_float_constants`
11102
11103
11104
11105The tracking issue for this feature is: [#146939]
11106
11107[#146939]: https://github.com/rust-lang/rust/issues/146939
11108
11109------------------------
11110"##,
11111        default_severity: Severity::Allow,
11112        warn_since: None,
11113        deny_since: None,
11114    },
11115    Lint {
11116        label: "more_maybe_bounds",
11117        description: r##"# `more_maybe_bounds`
11118
11119Allows using `?Trait` trait bounds in more contexts.
11120
11121This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
11122
11123------------------------
11124"##,
11125        default_severity: Severity::Allow,
11126        warn_since: None,
11127        deny_since: None,
11128    },
11129    Lint {
11130        label: "more_qualified_paths",
11131        description: r##"# `more_qualified_paths`
11132
11133The `more_qualified_paths` feature can be used in order to enable the
11134use of qualified paths in patterns.
11135
11136The tracking issue for this feature is: [#86935](https://github.com/rust-lang/rust/issues/86935).
11137
11138------------------------
11139
11140## Example
11141
11142```rust
11143#![feature(more_qualified_paths)]
11144
11145fn main() {
11146    // destructure through a qualified path
11147    let <Foo as A>::Assoc { br } = StructStruct { br: 2 };
11148}
11149
11150struct StructStruct {
11151    br: i8,
11152}
11153
11154struct Foo;
11155
11156trait A {
11157    type Assoc;
11158}
11159
11160impl A for Foo {
11161    type Assoc = StructStruct;
11162}
11163```
11164"##,
11165        default_severity: Severity::Allow,
11166        warn_since: None,
11167        deny_since: None,
11168    },
11169    Lint {
11170        label: "motor_ext",
11171        description: r##"# `motor_ext`
11172
11173
11174
11175The tracking issue for this feature is: [#147456]
11176
11177[#147456]: https://github.com/rust-lang/rust/issues/147456
11178
11179------------------------
11180"##,
11181        default_severity: Severity::Allow,
11182        warn_since: None,
11183        deny_since: None,
11184    },
11185    Lint {
11186        label: "move_expr",
11187        description: r##"# `move_expr`
11188
11189Allows `move(expr)` in closures.
11190
11191The tracking issue for this feature is: [#155050]
11192
11193[#155050]: https://github.com/rust-lang/rust/issues/155050
11194
11195------------------------
11196"##,
11197        default_severity: Severity::Allow,
11198        warn_since: None,
11199        deny_since: None,
11200    },
11201    Lint {
11202        label: "movrs_target_feature",
11203        description: r##"# `movrs_target_feature`
11204
11205The `movrs` target feature on x86.
11206
11207The tracking issue for this feature is: [#137976]
11208
11209[#137976]: https://github.com/rust-lang/rust/issues/137976
11210
11211------------------------
11212"##,
11213        default_severity: Severity::Allow,
11214        warn_since: None,
11215        deny_since: None,
11216    },
11217    Lint {
11218        label: "mpmc_channel",
11219        description: r##"# `mpmc_channel`
11220
11221
11222
11223The tracking issue for this feature is: [#126840]
11224
11225[#126840]: https://github.com/rust-lang/rust/issues/126840
11226
11227------------------------
11228"##,
11229        default_severity: Severity::Allow,
11230        warn_since: None,
11231        deny_since: None,
11232    },
11233    Lint {
11234        label: "mpsc_is_disconnected",
11235        description: r##"# `mpsc_is_disconnected`
11236
11237
11238
11239The tracking issue for this feature is: [#153668]
11240
11241[#153668]: https://github.com/rust-lang/rust/issues/153668
11242
11243------------------------
11244"##,
11245        default_severity: Severity::Allow,
11246        warn_since: None,
11247        deny_since: None,
11248    },
11249    Lint {
11250        label: "multiple_supertrait_upcastable",
11251        description: r##"# `multiple_supertrait_upcastable`
11252
11253Allows the `multiple_supertrait_upcastable` lint.
11254
11255The tracking issue for this feature is: [#150833]
11256
11257[#150833]: https://github.com/rust-lang/rust/issues/150833
11258
11259------------------------
11260"##,
11261        default_severity: Severity::Allow,
11262        warn_since: None,
11263        deny_since: None,
11264    },
11265    Lint {
11266        label: "must_not_suspend",
11267        description: r##"# `must_not_suspend`
11268
11269Allows the `#[must_not_suspend]` attribute.
11270
11271The tracking issue for this feature is: [#83310]
11272
11273[#83310]: https://github.com/rust-lang/rust/issues/83310
11274
11275------------------------
11276"##,
11277        default_severity: Severity::Allow,
11278        warn_since: None,
11279        deny_since: None,
11280    },
11281    Lint {
11282        label: "mut_ref",
11283        description: r##"# `mut_ref`
11284
11285Allows `mut ref` and `mut ref mut` identifier patterns.
11286
11287The tracking issue for this feature is: [#123076]
11288
11289[#123076]: https://github.com/rust-lang/rust/issues/123076
11290
11291------------------------
11292"##,
11293        default_severity: Severity::Allow,
11294        warn_since: None,
11295        deny_since: None,
11296    },
11297    Lint {
11298        label: "mutex_data_ptr",
11299        description: r##"# `mutex_data_ptr`
11300
11301
11302
11303The tracking issue for this feature is: [#140368]
11304
11305[#140368]: https://github.com/rust-lang/rust/issues/140368
11306
11307------------------------
11308"##,
11309        default_severity: Severity::Allow,
11310        warn_since: None,
11311        deny_since: None,
11312    },
11313    Lint {
11314        label: "naked_functions_rustic_abi",
11315        description: r##"# `naked_functions_rustic_abi`
11316
11317Allows using `#[naked]` on `extern "Rust"` functions.
11318
11319The tracking issue for this feature is: [#138997]
11320
11321[#138997]: https://github.com/rust-lang/rust/issues/138997
11322
11323------------------------
11324"##,
11325        default_severity: Severity::Allow,
11326        warn_since: None,
11327        deny_since: None,
11328    },
11329    Lint {
11330        label: "naked_functions_target_feature",
11331        description: r##"# `naked_functions_target_feature`
11332
11333Allows using `#[target_feature(enable = "...")]` on `#[naked]` on functions.
11334
11335The tracking issue for this feature is: [#138568]
11336
11337[#138568]: https://github.com/rust-lang/rust/issues/138568
11338
11339------------------------
11340"##,
11341        default_severity: Severity::Allow,
11342        warn_since: None,
11343        deny_since: None,
11344    },
11345    Lint {
11346        label: "native_link_modifiers_as_needed",
11347        description: r##"# `native_link_modifiers_as_needed`
11348
11349The tracking issue for this feature is: [#81490]
11350
11351[#81490]: https://github.com/rust-lang/rust/issues/81490
11352
11353------------------------
11354
11355The `native_link_modifiers_as_needed` feature allows you to use the `as-needed` modifier.
11356
11357`as-needed` is only compatible with the `dynamic` and `framework` linking kinds. Using any other kind will result in a compiler error.
11358
11359`+as-needed` means that the library will be actually linked only if it satisfies some undefined symbols at the point at which it is specified on the command line, making it similar to static libraries in this regard.
11360
11361This modifier translates to `--as-needed` for ld-like linkers, and to `-dead_strip_dylibs` / `-needed_library` / `-needed_framework` for ld64.
11362The modifier does nothing for linkers that don't support it (e.g. `link.exe`).
11363
11364The default for this modifier is unclear, some targets currently specify it as `+as-needed`, some do not. We may want to try making `+as-needed` a default for all targets.
11365"##,
11366        default_severity: Severity::Allow,
11367        warn_since: None,
11368        deny_since: None,
11369    },
11370    Lint {
11371        label: "needs_panic_runtime",
11372        description: r##"# `needs_panic_runtime`
11373
11374Allows declaring with `#![needs_panic_runtime]` that a panic runtime is needed.
11375
11376The tracking issue for this feature is: [#32837]
11377
11378[#32837]: https://github.com/rust-lang/rust/issues/32837
11379
11380------------------------
11381"##,
11382        default_severity: Severity::Allow,
11383        warn_since: None,
11384        deny_since: None,
11385    },
11386    Lint {
11387        label: "negative_bounds",
11388        description: r##"# `negative_bounds`
11389
11390Allow negative trait bounds. This is an internal-only feature for testing the trait solver!
11391
11392This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
11393
11394------------------------
11395"##,
11396        default_severity: Severity::Allow,
11397        warn_since: None,
11398        deny_since: None,
11399    },
11400    Lint {
11401        label: "negative_impls",
11402        description: r##"# `negative_impls`
11403
11404The tracking issue for this feature is [#68318].
11405
11406[#68318]: https://github.com/rust-lang/rust/issues/68318
11407
11408----
11409
11410With the feature gate `negative_impls`, you can write negative impls as well as positive ones:
11411
11412```rust
11413#![feature(negative_impls)]
11414trait DerefMut { }
11415impl<T: ?Sized> !DerefMut for &T { }
11416```
11417
11418Negative impls indicate a semver guarantee that the given trait will not be implemented for the given types. Negative impls play an additional purpose for auto traits, described below.
11419
11420Negative impls have the following characteristics:
11421
11422* They do not have any items.
11423* They must obey the orphan rules as if they were a positive impl.
11424* They cannot "overlap" with any positive impls.
11425
11426## Semver interaction
11427
11428It is a breaking change to remove a negative impl. Negative impls are a commitment not to implement the given trait for the named types.
11429
11430## Orphan and overlap rules
11431
11432Negative impls must obey the same orphan rules as a positive impl. This implies you cannot add a negative impl for types defined in upstream crates and so forth.
11433
11434Similarly, negative impls cannot overlap with positive impls, again using the same "overlap" check that we ordinarily use to determine if two impls overlap. (Note that positive impls typically cannot overlap with one another either, except as permitted by specialization.)
11435
11436## Interaction with auto traits
11437
11438Declaring a negative impl `impl !SomeAutoTrait for SomeType` for an
11439auto-trait serves two purposes:
11440
11441* as with any trait, it declares that `SomeType` will never implement `SomeAutoTrait`;
11442* it disables the automatic `SomeType: SomeAutoTrait` impl that would otherwise have been generated.
11443
11444Note that, at present, there is no way to indicate that a given type
11445does not implement an auto trait *but that it may do so in the
11446future*. For ordinary types, this is done by simply not declaring any
11447impl at all, but that is not an option for auto traits. A workaround
11448is that one could embed a marker type as one of the fields, where the
11449marker type is `!AutoTrait`.
11450
11451## Immediate uses
11452
11453Negative impls are used to declare that `&T: !DerefMut`  and `&mut T: !Clone`, as required to fix the soundness of `Pin` described in [#66544](https://github.com/rust-lang/rust/issues/66544).
11454
11455This serves two purposes:
11456
11457* For proving the correctness of unsafe code, we can use that impl as evidence that no `DerefMut` or `Clone` impl exists.
11458* It prevents downstream crates from creating such impls.
11459"##,
11460        default_severity: Severity::Allow,
11461        warn_since: None,
11462        deny_since: None,
11463    },
11464    Lint {
11465        label: "never_patterns",
11466        description: r##"# `never_patterns`
11467
11468Allows the `!` pattern.
11469
11470The tracking issue for this feature is: [#118155]
11471
11472[#118155]: https://github.com/rust-lang/rust/issues/118155
11473
11474------------------------
11475"##,
11476        default_severity: Severity::Allow,
11477        warn_since: None,
11478        deny_since: None,
11479    },
11480    Lint {
11481        label: "never_type",
11482        description: r##"# `never_type`
11483
11484Allows the `!` type. Does not imply 'exhaustive_patterns' (below) any more.
11485
11486The tracking issue for this feature is: [#35121]
11487
11488[#35121]: https://github.com/rust-lang/rust/issues/35121
11489
11490------------------------
11491"##,
11492        default_severity: Severity::Allow,
11493        warn_since: None,
11494        deny_since: None,
11495    },
11496    Lint {
11497        label: "new_range",
11498        description: r##"# `new_range`
11499
11500The tracking issue for this feature is: [#123741]
11501
11502[#123741]: https://github.com/rust-lang/rust/issues/123741
11503
11504---
11505
11506Switch the syntaxes `a..`, `a..b`, and `a..=b` to resolve the new range types.
11507"##,
11508        default_severity: Severity::Allow,
11509        warn_since: None,
11510        deny_since: None,
11511    },
11512    Lint {
11513        label: "new_range_api_legacy",
11514        description: r##"# `new_range_api_legacy`
11515
11516
11517
11518The tracking issue for this feature is: [#125687]
11519
11520[#125687]: https://github.com/rust-lang/rust/issues/125687
11521
11522------------------------
11523"##,
11524        default_severity: Severity::Allow,
11525        warn_since: None,
11526        deny_since: None,
11527    },
11528    Lint {
11529        label: "new_range_remainder",
11530        description: r##"# `new_range_remainder`
11531
11532
11533
11534The tracking issue for this feature is: [#154458]
11535
11536[#154458]: https://github.com/rust-lang/rust/issues/154458
11537
11538------------------------
11539"##,
11540        default_severity: Severity::Allow,
11541        warn_since: None,
11542        deny_since: None,
11543    },
11544    Lint {
11545        label: "next_index",
11546        description: r##"# `next_index`
11547
11548
11549
11550The tracking issue for this feature is: [#130711]
11551
11552[#130711]: https://github.com/rust-lang/rust/issues/130711
11553
11554------------------------
11555"##,
11556        default_severity: Severity::Allow,
11557        warn_since: None,
11558        deny_since: None,
11559    },
11560    Lint {
11561        label: "no_core",
11562        description: r##"# `no_core`
11563
11564Allows `#![no_core]`.
11565
11566The tracking issue for this feature is: [#29639]
11567
11568[#29639]: https://github.com/rust-lang/rust/issues/29639
11569
11570------------------------
11571"##,
11572        default_severity: Severity::Allow,
11573        warn_since: None,
11574        deny_since: None,
11575    },
11576    Lint {
11577        label: "non_exhaustive_omitted_patterns_lint",
11578        description: r##"# `non_exhaustive_omitted_patterns_lint`
11579
11580Allows using the `non_exhaustive_omitted_patterns` lint.
11581
11582The tracking issue for this feature is: [#89554]
11583
11584[#89554]: https://github.com/rust-lang/rust/issues/89554
11585
11586------------------------
11587"##,
11588        default_severity: Severity::Allow,
11589        warn_since: None,
11590        deny_since: None,
11591    },
11592    Lint {
11593        label: "non_lifetime_binders",
11594        description: r##"# `non_lifetime_binders`
11595
11596Allows `for<T>` binders in where-clauses
11597
11598The tracking issue for this feature is: [#108185]
11599
11600[#108185]: https://github.com/rust-lang/rust/issues/108185
11601
11602------------------------
11603"##,
11604        default_severity: Severity::Allow,
11605        warn_since: None,
11606        deny_since: None,
11607    },
11608    Lint {
11609        label: "nonpoison_condvar",
11610        description: r##"# `nonpoison_condvar`
11611
11612
11613
11614The tracking issue for this feature is: [#134645]
11615
11616[#134645]: https://github.com/rust-lang/rust/issues/134645
11617
11618------------------------
11619"##,
11620        default_severity: Severity::Allow,
11621        warn_since: None,
11622        deny_since: None,
11623    },
11624    Lint {
11625        label: "nonpoison_mutex",
11626        description: r##"# `nonpoison_mutex`
11627
11628
11629
11630The tracking issue for this feature is: [#134645]
11631
11632[#134645]: https://github.com/rust-lang/rust/issues/134645
11633
11634------------------------
11635"##,
11636        default_severity: Severity::Allow,
11637        warn_since: None,
11638        deny_since: None,
11639    },
11640    Lint {
11641        label: "nonpoison_rwlock",
11642        description: r##"# `nonpoison_rwlock`
11643
11644
11645
11646The tracking issue for this feature is: [#134645]
11647
11648[#134645]: https://github.com/rust-lang/rust/issues/134645
11649
11650------------------------
11651"##,
11652        default_severity: Severity::Allow,
11653        warn_since: None,
11654        deny_since: None,
11655    },
11656    Lint {
11657        label: "nonzero_bitwise",
11658        description: r##"# `nonzero_bitwise`
11659
11660
11661
11662The tracking issue for this feature is: [#128281]
11663
11664[#128281]: https://github.com/rust-lang/rust/issues/128281
11665
11666------------------------
11667"##,
11668        default_severity: Severity::Allow,
11669        warn_since: None,
11670        deny_since: None,
11671    },
11672    Lint {
11673        label: "nonzero_from_mut",
11674        description: r##"# `nonzero_from_mut`
11675
11676
11677
11678The tracking issue for this feature is: [#106290]
11679
11680[#106290]: https://github.com/rust-lang/rust/issues/106290
11681
11682------------------------
11683"##,
11684        default_severity: Severity::Allow,
11685        warn_since: None,
11686        deny_since: None,
11687    },
11688    Lint {
11689        label: "nonzero_from_str_radix",
11690        description: r##"# `nonzero_from_str_radix`
11691
11692
11693
11694The tracking issue for this feature is: [#152193]
11695
11696[#152193]: https://github.com/rust-lang/rust/issues/152193
11697
11698------------------------
11699"##,
11700        default_severity: Severity::Allow,
11701        warn_since: None,
11702        deny_since: None,
11703    },
11704    Lint {
11705        label: "nonzero_internals",
11706        description: r##"# `nonzero_internals`
11707
11708
11709
11710This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
11711
11712------------------------
11713"##,
11714        default_severity: Severity::Allow,
11715        warn_since: None,
11716        deny_since: None,
11717    },
11718    Lint {
11719        label: "nonzero_ops",
11720        description: r##"# `nonzero_ops`
11721
11722
11723
11724The tracking issue for this feature is: [#84186]
11725
11726[#84186]: https://github.com/rust-lang/rust/issues/84186
11727
11728------------------------
11729"##,
11730        default_severity: Severity::Allow,
11731        warn_since: None,
11732        deny_since: None,
11733    },
11734    Lint {
11735        label: "normalize_lexically",
11736        description: r##"# `normalize_lexically`
11737
11738
11739
11740The tracking issue for this feature is: [#134694]
11741
11742[#134694]: https://github.com/rust-lang/rust/issues/134694
11743
11744------------------------
11745"##,
11746        default_severity: Severity::Allow,
11747        warn_since: None,
11748        deny_since: None,
11749    },
11750    Lint {
11751        label: "num_internals",
11752        description: r##"# `num_internals`
11753
11754
11755
11756This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
11757
11758------------------------
11759"##,
11760        default_severity: Severity::Allow,
11761        warn_since: None,
11762        deny_since: None,
11763    },
11764    Lint {
11765        label: "numfmt",
11766        description: r##"# `numfmt`
11767
11768
11769
11770This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
11771
11772------------------------
11773"##,
11774        default_severity: Severity::Allow,
11775        warn_since: None,
11776        deny_since: None,
11777    },
11778    Lint {
11779        label: "nvptx_target_feature",
11780        description: r##"# `nvptx_target_feature`
11781
11782Target feaures on nvptx.
11783
11784The tracking issue for this feature is: [#150254]
11785
11786[#150254]: https://github.com/rust-lang/rust/issues/150254
11787
11788------------------------
11789"##,
11790        default_severity: Severity::Allow,
11791        warn_since: None,
11792        deny_since: None,
11793    },
11794    Lint {
11795        label: "objc_class_variant",
11796        description: r##"# `objc_class_variant`
11797
11798
11799
11800This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
11801
11802------------------------
11803"##,
11804        default_severity: Severity::Allow,
11805        warn_since: None,
11806        deny_since: None,
11807    },
11808    Lint {
11809        label: "objc_selector_variant",
11810        description: r##"# `objc_selector_variant`
11811
11812
11813
11814This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
11815
11816------------------------
11817"##,
11818        default_severity: Severity::Allow,
11819        warn_since: None,
11820        deny_since: None,
11821    },
11822    Lint {
11823        label: "offset_of_enum",
11824        description: r##"# `offset_of_enum`
11825
11826The tracking issue for this feature is: [#120141]
11827
11828[#120141]: https://github.com/rust-lang/rust/issues/120141
11829
11830------------------------
11831
11832When the `offset_of_enum` feature is enabled, the [`offset_of!`] macro may be used to obtain the
11833offsets of fields of `enum`s; to express this, `enum` variants may be traversed as if they were
11834fields. Variants themselves do not have an offset, so they cannot appear as the last path component.
11835
11836```rust
11837#![feature(offset_of_enum)]
11838use std::mem;
11839
11840#[repr(u8)]
11841enum Enum {
11842    A(u8, u16),
11843    B { one: u8, two: u16 },
11844}
11845
11846assert_eq!(mem::offset_of!(Enum, A.0), 1);
11847assert_eq!(mem::offset_of!(Enum, B.two), 2);
11848
11849assert_eq!(mem::offset_of!(Option<&u8>, Some.0), 0);
11850```
11851
11852[`offset_of!`]: ../../std/mem/macro.offset_of.html
11853"##,
11854        default_severity: Severity::Allow,
11855        warn_since: None,
11856        deny_since: None,
11857    },
11858    Lint {
11859        label: "offset_of_slice",
11860        description: r##"# `offset_of_slice`
11861
11862The tracking issue for this feature is: [#126151]
11863
11864[#126151]: https://github.com/rust-lang/rust/issues/126151
11865
11866------------------------
11867
11868When the `offset_of_slice` feature is enabled, the [`offset_of!`] macro may be used to determine
11869the offset of fields whose type is `[T]`, that is, a slice of dynamic size.
11870
11871In general, fields whose type is dynamically sized do not have statically known offsets because
11872they do not have statically known alignments. However, `[T]` has the same alignment as `T`, so
11873it specifically may be allowed.
11874
11875```rust
11876#![feature(offset_of_slice)]
11877
11878#[repr(C)]
11879pub struct Struct {
11880    head: u32,
11881    tail: [u8],
11882}
11883
11884fn main() {
11885    assert_eq!(std::mem::offset_of!(Struct, tail), 4);
11886}
11887```
11888
11889[`offset_of!`]: ../../std/mem/macro.offset_of.html
11890"##,
11891        default_severity: Severity::Allow,
11892        warn_since: None,
11893        deny_since: None,
11894    },
11895    Lint {
11896        label: "once_cell_get_mut",
11897        description: r##"# `once_cell_get_mut`
11898
11899
11900
11901The tracking issue for this feature is: [#121641]
11902
11903[#121641]: https://github.com/rust-lang/rust/issues/121641
11904
11905------------------------
11906"##,
11907        default_severity: Severity::Allow,
11908        warn_since: None,
11909        deny_since: None,
11910    },
11911    Lint {
11912        label: "once_cell_try",
11913        description: r##"# `once_cell_try`
11914
11915
11916
11917The tracking issue for this feature is: [#109737]
11918
11919[#109737]: https://github.com/rust-lang/rust/issues/109737
11920
11921------------------------
11922"##,
11923        default_severity: Severity::Allow,
11924        warn_since: None,
11925        deny_since: None,
11926    },
11927    Lint {
11928        label: "once_cell_try_insert",
11929        description: r##"# `once_cell_try_insert`
11930
11931
11932
11933The tracking issue for this feature is: [#116693]
11934
11935[#116693]: https://github.com/rust-lang/rust/issues/116693
11936
11937------------------------
11938"##,
11939        default_severity: Severity::Allow,
11940        warn_since: None,
11941        deny_since: None,
11942    },
11943    Lint {
11944        label: "one_sided_range",
11945        description: r##"# `one_sided_range`
11946
11947
11948
11949The tracking issue for this feature is: [#69780]
11950
11951[#69780]: https://github.com/rust-lang/rust/issues/69780
11952
11953------------------------
11954"##,
11955        default_severity: Severity::Allow,
11956        warn_since: None,
11957        deny_since: None,
11958    },
11959    Lint {
11960        label: "oneshot_channel",
11961        description: r##"# `oneshot_channel`
11962
11963
11964
11965The tracking issue for this feature is: [#143674]
11966
11967[#143674]: https://github.com/rust-lang/rust/issues/143674
11968
11969------------------------
11970"##,
11971        default_severity: Severity::Allow,
11972        warn_since: None,
11973        deny_since: None,
11974    },
11975    Lint {
11976        label: "optimize_attribute",
11977        description: r##"# `optimize_attribute`
11978
11979Allows using `#[optimize(X)]`.
11980
11981The tracking issue for this feature is: [#54882]
11982
11983[#54882]: https://github.com/rust-lang/rust/issues/54882
11984
11985------------------------
11986"##,
11987        default_severity: Severity::Allow,
11988        warn_since: None,
11989        deny_since: None,
11990    },
11991    Lint {
11992        label: "option_array_transpose",
11993        description: r##"# `option_array_transpose`
11994
11995
11996
11997The tracking issue for this feature is: [#130828]
11998
11999[#130828]: https://github.com/rust-lang/rust/issues/130828
12000
12001------------------------
12002"##,
12003        default_severity: Severity::Allow,
12004        warn_since: None,
12005        deny_since: None,
12006    },
12007    Lint {
12008        label: "option_get_or_try_insert_with",
12009        description: r##"# `option_get_or_try_insert_with`
12010
12011
12012
12013The tracking issue for this feature is: [#143648]
12014
12015[#143648]: https://github.com/rust-lang/rust/issues/143648
12016
12017------------------------
12018"##,
12019        default_severity: Severity::Allow,
12020        warn_since: None,
12021        deny_since: None,
12022    },
12023    Lint {
12024        label: "option_into_flat_iter",
12025        description: r##"# `option_into_flat_iter`
12026
12027
12028
12029The tracking issue for this feature is: [#148441]
12030
12031[#148441]: https://github.com/rust-lang/rust/issues/148441
12032
12033------------------------
12034"##,
12035        default_severity: Severity::Allow,
12036        warn_since: None,
12037        deny_since: None,
12038    },
12039    Lint {
12040        label: "option_reduce",
12041        description: r##"# `option_reduce`
12042
12043
12044
12045The tracking issue for this feature is: [#144273]
12046
12047[#144273]: https://github.com/rust-lang/rust/issues/144273
12048
12049------------------------
12050"##,
12051        default_severity: Severity::Allow,
12052        warn_since: None,
12053        deny_since: None,
12054    },
12055    Lint {
12056        label: "option_reference_flattening",
12057        description: r##"# `option_reference_flattening`
12058
12059
12060
12061The tracking issue for this feature is: [#149221]
12062
12063[#149221]: https://github.com/rust-lang/rust/issues/149221
12064
12065------------------------
12066"##,
12067        default_severity: Severity::Allow,
12068        warn_since: None,
12069        deny_since: None,
12070    },
12071    Lint {
12072        label: "option_zip",
12073        description: r##"# `option_zip`
12074
12075
12076
12077The tracking issue for this feature is: [#70086]
12078
12079[#70086]: https://github.com/rust-lang/rust/issues/70086
12080
12081------------------------
12082"##,
12083        default_severity: Severity::Allow,
12084        warn_since: None,
12085        deny_since: None,
12086    },
12087    Lint {
12088        label: "os_str_slice",
12089        description: r##"# `os_str_slice`
12090
12091
12092
12093The tracking issue for this feature is: [#118485]
12094
12095[#118485]: https://github.com/rust-lang/rust/issues/118485
12096
12097------------------------
12098"##,
12099        default_severity: Severity::Allow,
12100        warn_since: None,
12101        deny_since: None,
12102    },
12103    Lint {
12104        label: "os_string_truncate",
12105        description: r##"# `os_string_truncate`
12106
12107
12108
12109The tracking issue for this feature is: [#133262]
12110
12111[#133262]: https://github.com/rust-lang/rust/issues/133262
12112
12113------------------------
12114"##,
12115        default_severity: Severity::Allow,
12116        warn_since: None,
12117        deny_since: None,
12118    },
12119    Lint {
12120        label: "panic_abort",
12121        description: r##"# `panic_abort`
12122
12123
12124
12125The tracking issue for this feature is: [#32837]
12126
12127[#32837]: https://github.com/rust-lang/rust/issues/32837
12128
12129------------------------
12130"##,
12131        default_severity: Severity::Allow,
12132        warn_since: None,
12133        deny_since: None,
12134    },
12135    Lint {
12136        label: "panic_always_abort",
12137        description: r##"# `panic_always_abort`
12138
12139
12140
12141The tracking issue for this feature is: [#84438]
12142
12143[#84438]: https://github.com/rust-lang/rust/issues/84438
12144
12145------------------------
12146"##,
12147        default_severity: Severity::Allow,
12148        warn_since: None,
12149        deny_since: None,
12150    },
12151    Lint {
12152        label: "panic_backtrace_config",
12153        description: r##"# `panic_backtrace_config`
12154
12155
12156
12157The tracking issue for this feature is: [#93346]
12158
12159[#93346]: https://github.com/rust-lang/rust/issues/93346
12160
12161------------------------
12162"##,
12163        default_severity: Severity::Allow,
12164        warn_since: None,
12165        deny_since: None,
12166    },
12167    Lint {
12168        label: "panic_can_unwind",
12169        description: r##"# `panic_can_unwind`
12170
12171
12172
12173The tracking issue for this feature is: [#92988]
12174
12175[#92988]: https://github.com/rust-lang/rust/issues/92988
12176
12177------------------------
12178"##,
12179        default_severity: Severity::Allow,
12180        warn_since: None,
12181        deny_since: None,
12182    },
12183    Lint {
12184        label: "panic_internals",
12185        description: r##"# `panic_internals`
12186
12187
12188
12189This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
12190
12191------------------------
12192"##,
12193        default_severity: Severity::Allow,
12194        warn_since: None,
12195        deny_since: None,
12196    },
12197    Lint {
12198        label: "panic_runtime",
12199        description: r##"# `panic_runtime`
12200
12201Allows using the `#![panic_runtime]` attribute.
12202
12203The tracking issue for this feature is: [#32837]
12204
12205[#32837]: https://github.com/rust-lang/rust/issues/32837
12206
12207------------------------
12208"##,
12209        default_severity: Severity::Allow,
12210        warn_since: None,
12211        deny_since: None,
12212    },
12213    Lint {
12214        label: "panic_unwind",
12215        description: r##"# `panic_unwind`
12216
12217
12218
12219The tracking issue for this feature is: [#32837]
12220
12221[#32837]: https://github.com/rust-lang/rust/issues/32837
12222
12223------------------------
12224"##,
12225        default_severity: Severity::Allow,
12226        warn_since: None,
12227        deny_since: None,
12228    },
12229    Lint {
12230        label: "panic_update_hook",
12231        description: r##"# `panic_update_hook`
12232
12233
12234
12235The tracking issue for this feature is: [#92649]
12236
12237[#92649]: https://github.com/rust-lang/rust/issues/92649
12238
12239------------------------
12240"##,
12241        default_severity: Severity::Allow,
12242        warn_since: None,
12243        deny_since: None,
12244    },
12245    Lint {
12246        label: "partial_ord_chaining_methods",
12247        description: r##"# `partial_ord_chaining_methods`
12248
12249
12250
12251This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
12252
12253------------------------
12254"##,
12255        default_severity: Severity::Allow,
12256        warn_since: None,
12257        deny_since: None,
12258    },
12259    Lint {
12260        label: "patchable_function_entry",
12261        description: r##"# `patchable_function_entry`
12262
12263Allows specifying nop padding on functions for dynamic patching.
12264
12265The tracking issue for this feature is: [#123115]
12266
12267[#123115]: https://github.com/rust-lang/rust/issues/123115
12268
12269------------------------
12270"##,
12271        default_severity: Severity::Allow,
12272        warn_since: None,
12273        deny_since: None,
12274    },
12275    Lint {
12276        label: "path_absolute_method",
12277        description: r##"# `path_absolute_method`
12278
12279
12280
12281The tracking issue for this feature is: [#153328]
12282
12283[#153328]: https://github.com/rust-lang/rust/issues/153328
12284
12285------------------------
12286"##,
12287        default_severity: Severity::Allow,
12288        warn_since: None,
12289        deny_since: None,
12290    },
12291    Lint {
12292        label: "path_is_empty",
12293        description: r##"# `path_is_empty`
12294
12295
12296
12297The tracking issue for this feature is: [#148494]
12298
12299[#148494]: https://github.com/rust-lang/rust/issues/148494
12300
12301------------------------
12302"##,
12303        default_severity: Severity::Allow,
12304        warn_since: None,
12305        deny_since: None,
12306    },
12307    Lint {
12308        label: "path_trailing_sep",
12309        description: r##"# `path_trailing_sep`
12310
12311
12312
12313The tracking issue for this feature is: [#142503]
12314
12315[#142503]: https://github.com/rust-lang/rust/issues/142503
12316
12317------------------------
12318"##,
12319        default_severity: Severity::Allow,
12320        warn_since: None,
12321        deny_since: None,
12322    },
12323    Lint {
12324        label: "pathbuf_into_string",
12325        description: r##"# `pathbuf_into_string`
12326
12327
12328
12329The tracking issue for this feature is: [#156203]
12330
12331[#156203]: https://github.com/rust-lang/rust/issues/156203
12332
12333------------------------
12334"##,
12335        default_severity: Severity::Allow,
12336        warn_since: None,
12337        deny_since: None,
12338    },
12339    Lint {
12340        label: "pattern",
12341        description: r##"# `pattern`
12342
12343
12344
12345The tracking issue for this feature is: [#27721]
12346
12347[#27721]: https://github.com/rust-lang/rust/issues/27721
12348
12349------------------------
12350"##,
12351        default_severity: Severity::Allow,
12352        warn_since: None,
12353        deny_since: None,
12354    },
12355    Lint {
12356        label: "pattern_complexity_limit",
12357        description: r##"# `pattern_complexity_limit`
12358
12359Set the maximum pattern complexity allowed (not limited by default).
12360
12361This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
12362
12363------------------------
12364"##,
12365        default_severity: Severity::Allow,
12366        warn_since: None,
12367        deny_since: None,
12368    },
12369    Lint {
12370        label: "pattern_type_macro",
12371        description: r##"# `pattern_type_macro`
12372
12373
12374
12375The tracking issue for this feature is: [#123646]
12376
12377[#123646]: https://github.com/rust-lang/rust/issues/123646
12378
12379------------------------
12380"##,
12381        default_severity: Severity::Allow,
12382        warn_since: None,
12383        deny_since: None,
12384    },
12385    Lint {
12386        label: "pattern_type_range_trait",
12387        description: r##"# `pattern_type_range_trait`
12388
12389
12390
12391The tracking issue for this feature is: [#123646]
12392
12393[#123646]: https://github.com/rust-lang/rust/issues/123646
12394
12395------------------------
12396"##,
12397        default_severity: Severity::Allow,
12398        warn_since: None,
12399        deny_since: None,
12400    },
12401    Lint {
12402        label: "pattern_types",
12403        description: r##"# `pattern_types`
12404
12405Allows using pattern types.
12406
12407The tracking issue for this feature is: [#123646]
12408
12409[#123646]: https://github.com/rust-lang/rust/issues/123646
12410
12411------------------------
12412"##,
12413        default_severity: Severity::Allow,
12414        warn_since: None,
12415        deny_since: None,
12416    },
12417    Lint {
12418        label: "peer_credentials_unix_socket",
12419        description: r##"# `peer_credentials_unix_socket`
12420
12421
12422
12423The tracking issue for this feature is: [#42839]
12424
12425[#42839]: https://github.com/rust-lang/rust/issues/42839
12426
12427------------------------
12428"##,
12429        default_severity: Severity::Allow,
12430        warn_since: None,
12431        deny_since: None,
12432    },
12433    Lint {
12434        label: "phantom_variance_markers",
12435        description: r##"# `phantom_variance_markers`
12436
12437
12438
12439The tracking issue for this feature is: [#135806]
12440
12441[#135806]: https://github.com/rust-lang/rust/issues/135806
12442
12443------------------------
12444"##,
12445        default_severity: Severity::Allow,
12446        warn_since: None,
12447        deny_since: None,
12448    },
12449    Lint {
12450        label: "pin_coerce_unsized_trait",
12451        description: r##"# `pin_coerce_unsized_trait`
12452
12453
12454
12455The tracking issue for this feature is: [#150112]
12456
12457[#150112]: https://github.com/rust-lang/rust/issues/150112
12458
12459------------------------
12460"##,
12461        default_severity: Severity::Allow,
12462        warn_since: None,
12463        deny_since: None,
12464    },
12465    Lint {
12466        label: "pin_derefmut_internals",
12467        description: r##"# `pin_derefmut_internals`
12468
12469
12470
12471This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
12472
12473------------------------
12474"##,
12475        default_severity: Severity::Allow,
12476        warn_since: None,
12477        deny_since: None,
12478    },
12479    Lint {
12480        label: "pin_ergonomics",
12481        description: r##"# `pin_ergonomics`
12482
12483Experimental features that make `Pin` more ergonomic.
12484
12485The tracking issue for this feature is: [#130494]
12486
12487[#130494]: https://github.com/rust-lang/rust/issues/130494
12488
12489------------------------
12490"##,
12491        default_severity: Severity::Allow,
12492        warn_since: None,
12493        deny_since: None,
12494    },
12495    Lint {
12496        label: "pin_macro_internals",
12497        description: r##"# `pin_macro_internals`
12498
12499
12500
12501This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
12502
12503------------------------
12504"##,
12505        default_severity: Severity::Allow,
12506        warn_since: None,
12507        deny_since: None,
12508    },
12509    Lint {
12510        label: "pointer_is_aligned_to",
12511        description: r##"# `pointer_is_aligned_to`
12512
12513
12514
12515The tracking issue for this feature is: [#96284]
12516
12517[#96284]: https://github.com/rust-lang/rust/issues/96284
12518
12519------------------------
12520"##,
12521        default_severity: Severity::Allow,
12522        warn_since: None,
12523        deny_since: None,
12524    },
12525    Lint {
12526        label: "pointer_try_cast_aligned",
12527        description: r##"# `pointer_try_cast_aligned`
12528
12529
12530
12531The tracking issue for this feature is: [#141221]
12532
12533[#141221]: https://github.com/rust-lang/rust/issues/141221
12534
12535------------------------
12536"##,
12537        default_severity: Severity::Allow,
12538        warn_since: None,
12539        deny_since: None,
12540    },
12541    Lint {
12542        label: "portable_simd",
12543        description: r##"# `portable_simd`
12544
12545
12546
12547The tracking issue for this feature is: [#86656]
12548
12549[#86656]: https://github.com/rust-lang/rust/issues/86656
12550
12551------------------------
12552"##,
12553        default_severity: Severity::Allow,
12554        warn_since: None,
12555        deny_since: None,
12556    },
12557    Lint {
12558        label: "postfix_match",
12559        description: r##"# `postfix-match`
12560
12561`postfix-match` adds the feature for matching upon values postfix
12562the expressions that generate the values.
12563
12564The tracking issue for this feature is: [#121618](https://github.com/rust-lang/rust/issues/121618).
12565
12566------------------------
12567
12568```rust,edition2021
12569#![feature(postfix_match)]
12570
12571enum Foo {
12572    Bar,
12573    Baz
12574}
12575
12576fn get_foo() -> Foo {
12577    Foo::Bar
12578}
12579
12580get_foo().match {
12581    Foo::Bar => {},
12582    Foo::Baz => panic!(),
12583}
12584```
12585"##,
12586        default_severity: Severity::Allow,
12587        warn_since: None,
12588        deny_since: None,
12589    },
12590    Lint {
12591        label: "powerpc_target_feature",
12592        description: r##"# `powerpc_target_feature`
12593
12594Target features on powerpc.
12595
12596The tracking issue for this feature is: [#150255]
12597
12598[#150255]: https://github.com/rust-lang/rust/issues/150255
12599
12600------------------------
12601"##,
12602        default_severity: Severity::Allow,
12603        warn_since: None,
12604        deny_since: None,
12605    },
12606    Lint {
12607        label: "prelude_future",
12608        description: r##"# `prelude_future`
12609
12610
12611
12612This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
12613
12614------------------------
12615"##,
12616        default_severity: Severity::Allow,
12617        warn_since: None,
12618        deny_since: None,
12619    },
12620    Lint {
12621        label: "prelude_import",
12622        description: r##"# `prelude_import`
12623
12624Allows using `#[prelude_import]` on glob `use` items.
12625
12626This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
12627
12628------------------------
12629"##,
12630        default_severity: Severity::Allow,
12631        warn_since: None,
12632        deny_since: None,
12633    },
12634    Lint {
12635        label: "prelude_next",
12636        description: r##"# `prelude_next`
12637
12638
12639
12640This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
12641
12642------------------------
12643"##,
12644        default_severity: Severity::Allow,
12645        warn_since: None,
12646        deny_since: None,
12647    },
12648    Lint {
12649        label: "prfchw_target_feature",
12650        description: r##"# `prfchw_target_feature`
12651
12652The prfchw target feature on x86.
12653
12654The tracking issue for this feature is: [#150256]
12655
12656[#150256]: https://github.com/rust-lang/rust/issues/150256
12657
12658------------------------
12659"##,
12660        default_severity: Severity::Allow,
12661        warn_since: None,
12662        deny_since: None,
12663    },
12664    Lint {
12665        label: "print_internals",
12666        description: r##"# `print_internals`
12667
12668This feature is internal to the Rust compiler and is not intended for general use.
12669
12670------------------------
12671"##,
12672        default_severity: Severity::Allow,
12673        warn_since: None,
12674        deny_since: None,
12675    },
12676    Lint {
12677        label: "proc_macro_def_site",
12678        description: r##"# `proc_macro_def_site`
12679
12680
12681
12682The tracking issue for this feature is: [#54724]
12683
12684[#54724]: https://github.com/rust-lang/rust/issues/54724
12685
12686------------------------
12687"##,
12688        default_severity: Severity::Allow,
12689        warn_since: None,
12690        deny_since: None,
12691    },
12692    Lint {
12693        label: "proc_macro_diagnostic",
12694        description: r##"# `proc_macro_diagnostic`
12695
12696
12697
12698The tracking issue for this feature is: [#54140]
12699
12700[#54140]: https://github.com/rust-lang/rust/issues/54140
12701
12702------------------------
12703"##,
12704        default_severity: Severity::Allow,
12705        warn_since: None,
12706        deny_since: None,
12707    },
12708    Lint {
12709        label: "proc_macro_expand",
12710        description: r##"# `proc_macro_expand`
12711
12712
12713
12714The tracking issue for this feature is: [#90765]
12715
12716[#90765]: https://github.com/rust-lang/rust/issues/90765
12717
12718------------------------
12719"##,
12720        default_severity: Severity::Allow,
12721        warn_since: None,
12722        deny_since: None,
12723    },
12724    Lint {
12725        label: "proc_macro_hygiene",
12726        description: r##"# `proc_macro_hygiene`
12727
12728Allows macro attributes on expressions, statements and non-inline modules.
12729
12730The tracking issue for this feature is: [#54727]
12731
12732[#54727]: https://github.com/rust-lang/rust/issues/54727
12733
12734------------------------
12735"##,
12736        default_severity: Severity::Allow,
12737        warn_since: None,
12738        deny_since: None,
12739    },
12740    Lint {
12741        label: "proc_macro_internals",
12742        description: r##"# `proc_macro_internals`
12743
12744
12745
12746The tracking issue for this feature is: [#27812]
12747
12748[#27812]: https://github.com/rust-lang/rust/issues/27812
12749
12750------------------------
12751"##,
12752        default_severity: Severity::Allow,
12753        warn_since: None,
12754        deny_since: None,
12755    },
12756    Lint {
12757        label: "proc_macro_quote",
12758        description: r##"# `proc_macro_quote`
12759
12760
12761
12762The tracking issue for this feature is: [#54722]
12763
12764[#54722]: https://github.com/rust-lang/rust/issues/54722
12765
12766------------------------
12767"##,
12768        default_severity: Severity::Allow,
12769        warn_since: None,
12770        deny_since: None,
12771    },
12772    Lint {
12773        label: "proc_macro_span",
12774        description: r##"# `proc_macro_span`
12775
12776
12777
12778The tracking issue for this feature is: [#54725]
12779
12780[#54725]: https://github.com/rust-lang/rust/issues/54725
12781
12782------------------------
12783"##,
12784        default_severity: Severity::Allow,
12785        warn_since: None,
12786        deny_since: None,
12787    },
12788    Lint {
12789        label: "proc_macro_totokens",
12790        description: r##"# `proc_macro_totokens`
12791
12792
12793
12794The tracking issue for this feature is: [#130977]
12795
12796[#130977]: https://github.com/rust-lang/rust/issues/130977
12797
12798------------------------
12799"##,
12800        default_severity: Severity::Allow,
12801        warn_since: None,
12802        deny_since: None,
12803    },
12804    Lint {
12805        label: "proc_macro_tracked_env",
12806        description: r##"# `proc_macro_tracked_env`
12807
12808
12809
12810The tracking issue for this feature is: [#99515]
12811
12812[#99515]: https://github.com/rust-lang/rust/issues/99515
12813
12814------------------------
12815"##,
12816        default_severity: Severity::Allow,
12817        warn_since: None,
12818        deny_since: None,
12819    },
12820    Lint {
12821        label: "proc_macro_tracked_path",
12822        description: r##"# `proc_macro_tracked_path`
12823
12824
12825
12826The tracking issue for this feature is: [#99515]
12827
12828[#99515]: https://github.com/rust-lang/rust/issues/99515
12829
12830------------------------
12831"##,
12832        default_severity: Severity::Allow,
12833        warn_since: None,
12834        deny_since: None,
12835    },
12836    Lint {
12837        label: "proc_macro_value",
12838        description: r##"# `proc_macro_value`
12839
12840
12841
12842The tracking issue for this feature is: [#136652]
12843
12844[#136652]: https://github.com/rust-lang/rust/issues/136652
12845
12846------------------------
12847"##,
12848        default_severity: Severity::Allow,
12849        warn_since: None,
12850        deny_since: None,
12851    },
12852    Lint {
12853        label: "process_chroot",
12854        description: r##"# `process_chroot`
12855
12856
12857
12858The tracking issue for this feature is: [#141298]
12859
12860[#141298]: https://github.com/rust-lang/rust/issues/141298
12861
12862------------------------
12863"##,
12864        default_severity: Severity::Allow,
12865        warn_since: None,
12866        deny_since: None,
12867    },
12868    Lint {
12869        label: "process_exitcode_internals",
12870        description: r##"# `process_exitcode_internals`
12871
12872
12873
12874This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
12875
12876------------------------
12877"##,
12878        default_severity: Severity::Allow,
12879        warn_since: None,
12880        deny_since: None,
12881    },
12882    Lint {
12883        label: "process_internals",
12884        description: r##"# `process_internals`
12885
12886
12887
12888This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
12889
12890------------------------
12891"##,
12892        default_severity: Severity::Allow,
12893        warn_since: None,
12894        deny_since: None,
12895    },
12896    Lint {
12897        label: "process_setsid",
12898        description: r##"# `process_setsid`
12899
12900
12901
12902The tracking issue for this feature is: [#105376]
12903
12904[#105376]: https://github.com/rust-lang/rust/issues/105376
12905
12906------------------------
12907"##,
12908        default_severity: Severity::Allow,
12909        warn_since: None,
12910        deny_since: None,
12911    },
12912    Lint {
12913        label: "profiler_runtime",
12914        description: r##"# `profiler_runtime`
12915
12916The tracking issue for this feature is: [#42524](https://github.com/rust-lang/rust/issues/42524).
12917
12918------------------------
12919"##,
12920        default_severity: Severity::Allow,
12921        warn_since: None,
12922        deny_since: None,
12923    },
12924    Lint {
12925        label: "profiler_runtime_lib",
12926        description: r##"# `profiler_runtime_lib`
12927
12928This feature is internal to the Rust compiler and is not intended for general use.
12929
12930------------------------
12931"##,
12932        default_severity: Severity::Allow,
12933        warn_since: None,
12934        deny_since: None,
12935    },
12936    Lint {
12937        label: "profiling_marker_api",
12938        description: r##"# `profiling_marker_api`
12939
12940
12941
12942The tracking issue for this feature is: [#148197]
12943
12944[#148197]: https://github.com/rust-lang/rust/issues/148197
12945
12946------------------------
12947"##,
12948        default_severity: Severity::Allow,
12949        warn_since: None,
12950        deny_since: None,
12951    },
12952    Lint {
12953        label: "ptr_alignment_type",
12954        description: r##"# `ptr_alignment_type`
12955
12956
12957
12958The tracking issue for this feature is: [#102070]
12959
12960[#102070]: https://github.com/rust-lang/rust/issues/102070
12961
12962------------------------
12963"##,
12964        default_severity: Severity::Allow,
12965        warn_since: None,
12966        deny_since: None,
12967    },
12968    Lint {
12969        label: "ptr_as_uninit",
12970        description: r##"# `ptr_as_uninit`
12971
12972
12973
12974The tracking issue for this feature is: [#75402]
12975
12976[#75402]: https://github.com/rust-lang/rust/issues/75402
12977
12978------------------------
12979"##,
12980        default_severity: Severity::Allow,
12981        warn_since: None,
12982        deny_since: None,
12983    },
12984    Lint {
12985        label: "ptr_cast_array",
12986        description: r##"# `ptr_cast_array`
12987
12988
12989
12990The tracking issue for this feature is: [#144514]
12991
12992[#144514]: https://github.com/rust-lang/rust/issues/144514
12993
12994------------------------
12995"##,
12996        default_severity: Severity::Allow,
12997        warn_since: None,
12998        deny_since: None,
12999    },
13000    Lint {
13001        label: "ptr_cast_slice",
13002        description: r##"# `ptr_cast_slice`
13003
13004
13005
13006The tracking issue for this feature is: [#149103]
13007
13008[#149103]: https://github.com/rust-lang/rust/issues/149103
13009
13010------------------------
13011"##,
13012        default_severity: Severity::Allow,
13013        warn_since: None,
13014        deny_since: None,
13015    },
13016    Lint {
13017        label: "ptr_internals",
13018        description: r##"# `ptr_internals`
13019
13020
13021
13022This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
13023
13024------------------------
13025"##,
13026        default_severity: Severity::Allow,
13027        warn_since: None,
13028        deny_since: None,
13029    },
13030    Lint {
13031        label: "ptr_mask",
13032        description: r##"# `ptr_mask`
13033
13034
13035
13036The tracking issue for this feature is: [#98290]
13037
13038[#98290]: https://github.com/rust-lang/rust/issues/98290
13039
13040------------------------
13041"##,
13042        default_severity: Severity::Allow,
13043        warn_since: None,
13044        deny_since: None,
13045    },
13046    Lint {
13047        label: "ptr_metadata",
13048        description: r##"# `ptr_metadata`
13049
13050
13051
13052The tracking issue for this feature is: [#81513]
13053
13054[#81513]: https://github.com/rust-lang/rust/issues/81513
13055
13056------------------------
13057"##,
13058        default_severity: Severity::Allow,
13059        warn_since: None,
13060        deny_since: None,
13061    },
13062    Lint {
13063        label: "pub_crate_should_not_need_unstable_attr",
13064        description: r##"# `pub_crate_should_not_need_unstable_attr`
13065
13066
13067
13068This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
13069
13070------------------------
13071"##,
13072        default_severity: Severity::Allow,
13073        warn_since: None,
13074        deny_since: None,
13075    },
13076    Lint {
13077        label: "random",
13078        description: r##"# `random`
13079
13080
13081
13082The tracking issue for this feature is: [#130703]
13083
13084[#130703]: https://github.com/rust-lang/rust/issues/130703
13085
13086------------------------
13087"##,
13088        default_severity: Severity::Allow,
13089        warn_since: None,
13090        deny_since: None,
13091    },
13092    Lint {
13093        label: "range_bounds_is_empty",
13094        description: r##"# `range_bounds_is_empty`
13095
13096
13097
13098The tracking issue for this feature is: [#137300]
13099
13100[#137300]: https://github.com/rust-lang/rust/issues/137300
13101
13102------------------------
13103"##,
13104        default_severity: Severity::Allow,
13105        warn_since: None,
13106        deny_since: None,
13107    },
13108    Lint {
13109        label: "range_into_bounds",
13110        description: r##"# `range_into_bounds`
13111
13112
13113
13114The tracking issue for this feature is: [#136903]
13115
13116[#136903]: https://github.com/rust-lang/rust/issues/136903
13117
13118------------------------
13119"##,
13120        default_severity: Severity::Allow,
13121        warn_since: None,
13122        deny_since: None,
13123    },
13124    Lint {
13125        label: "raw_dylib_elf",
13126        description: r##"# `raw_dylib_elf`
13127
13128Allows the use of raw-dylibs on ELF platforms
13129
13130The tracking issue for this feature is: [#135694]
13131
13132[#135694]: https://github.com/rust-lang/rust/issues/135694
13133
13134------------------------
13135"##,
13136        default_severity: Severity::Allow,
13137        warn_since: None,
13138        deny_since: None,
13139    },
13140    Lint {
13141        label: "raw_os_error_ty",
13142        description: r##"# `raw_os_error_ty`
13143
13144
13145
13146The tracking issue for this feature is: [#107792]
13147
13148[#107792]: https://github.com/rust-lang/rust/issues/107792
13149
13150------------------------
13151"##,
13152        default_severity: Severity::Allow,
13153        warn_since: None,
13154        deny_since: None,
13155    },
13156    Lint {
13157        label: "raw_slice_split",
13158        description: r##"# `raw_slice_split`
13159
13160
13161
13162The tracking issue for this feature is: [#95595]
13163
13164[#95595]: https://github.com/rust-lang/rust/issues/95595
13165
13166------------------------
13167"##,
13168        default_severity: Severity::Allow,
13169        warn_since: None,
13170        deny_since: None,
13171    },
13172    Lint {
13173        label: "raw_vec_internals",
13174        description: r##"# `raw_vec_internals`
13175
13176
13177
13178This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
13179
13180------------------------
13181"##,
13182        default_severity: Severity::Allow,
13183        warn_since: None,
13184        deny_since: None,
13185    },
13186    Lint {
13187        label: "read_array",
13188        description: r##"# `read_array`
13189
13190
13191
13192The tracking issue for this feature is: [#148848]
13193
13194[#148848]: https://github.com/rust-lang/rust/issues/148848
13195
13196------------------------
13197"##,
13198        default_severity: Severity::Allow,
13199        warn_since: None,
13200        deny_since: None,
13201    },
13202    Lint {
13203        label: "read_buf",
13204        description: r##"# `read_buf`
13205
13206
13207
13208The tracking issue for this feature is: [#78485]
13209
13210[#78485]: https://github.com/rust-lang/rust/issues/78485
13211
13212------------------------
13213"##,
13214        default_severity: Severity::Allow,
13215        warn_since: None,
13216        deny_since: None,
13217    },
13218    Lint {
13219        label: "read_buf_at",
13220        description: r##"# `read_buf_at`
13221
13222
13223
13224The tracking issue for this feature is: [#140771]
13225
13226[#140771]: https://github.com/rust-lang/rust/issues/140771
13227
13228------------------------
13229"##,
13230        default_severity: Severity::Allow,
13231        warn_since: None,
13232        deny_since: None,
13233    },
13234    Lint {
13235        label: "reborrow",
13236        description: r##"# `reborrow`
13237
13238
13239
13240The tracking issue for this feature is: [#145612]
13241
13242[#145612]: https://github.com/rust-lang/rust/issues/145612
13243
13244------------------------
13245"##,
13246        default_severity: Severity::Allow,
13247        warn_since: None,
13248        deny_since: None,
13249    },
13250    Lint {
13251        label: "reentrant_lock",
13252        description: r##"# `reentrant_lock`
13253
13254
13255
13256The tracking issue for this feature is: [#121440]
13257
13258[#121440]: https://github.com/rust-lang/rust/issues/121440
13259
13260------------------------
13261"##,
13262        default_severity: Severity::Allow,
13263        warn_since: None,
13264        deny_since: None,
13265    },
13266    Lint {
13267        label: "reentrant_lock_data_ptr",
13268        description: r##"# `reentrant_lock_data_ptr`
13269
13270
13271
13272The tracking issue for this feature is: [#140368]
13273
13274[#140368]: https://github.com/rust-lang/rust/issues/140368
13275
13276------------------------
13277"##,
13278        default_severity: Severity::Allow,
13279        warn_since: None,
13280        deny_since: None,
13281    },
13282    Lint {
13283        label: "ref_pat_eat_one_layer_2024",
13284        description: r##"# `ref_pat_eat_one_layer_2024`
13285
13286The tracking issue for this feature is: [#123076]
13287
13288[#123076]: https://github.com/rust-lang/rust/issues/123076
13289
13290---
13291
13292This feature is incomplete and not yet intended for general use.
13293
13294This implements experimental, Edition-dependent match ergonomics under consideration for inclusion
13295in Rust, allowing `&` patterns in more places. For example:
13296
13297```rust,edition2024
13298#![feature(ref_pat_eat_one_layer_2024)]
13299#![allow(incomplete_features)]
13300#
13301# // Tests type equality in a way that avoids coercing `&&T` or `&mut T` to `&T`.
13302# trait Eq<T> {}
13303# impl<T> Eq<T> for T {}
13304# fn has_type<T>(_: impl Eq<T>) {}
13305
13306// `&` can match against a `ref` binding mode instead of a reference type:
13307let (x, &y) = &(0, 1);
13308has_type::<&u8>(x);
13309has_type::<u8>(y);
13310
13311// `&` can match against `&mut` references:
13312let &z = &mut 2;
13313has_type::<u8>(z);
13314```
13315
13316For specifics, see the corresponding typing rules for [Editions 2021 and earlier] and for
13317[Editions 2024 and later]. For more information on binding modes, see [The Rust Reference].
13318
13319For alternative experimental match ergonomics, see the feature
13320[`ref_pat_eat_one_layer_2024_structural`](./ref-pat-eat-one-layer-2024-structural.md).
13321
13322[Editions 2021 and earlier]: https://nadrieril.github.io/typing-rust-patterns/?compare=false&opts1=AQEBAQIBAQABAAAAAQEBAAEBAAABAAA%3D&mode=rules&do_cmp=false
13323[Editions 2024 and later]: https://nadrieril.github.io/typing-rust-patterns/?compare=false&opts1=AQEBAAABAQABAgIAAQEBAAEBAAABAAA%3D&mode=rules&do_cmp=false
13324[The Rust Reference]: https://doc.rust-lang.org/reference/patterns.html#binding-modes
13325"##,
13326        default_severity: Severity::Allow,
13327        warn_since: None,
13328        deny_since: None,
13329    },
13330    Lint {
13331        label: "ref_pat_eat_one_layer_2024_structural",
13332        description: r##"# `ref_pat_eat_one_layer_2024_structural`
13333
13334The tracking issue for this feature is: [#123076]
13335
13336[#123076]: https://github.com/rust-lang/rust/issues/123076
13337
13338---
13339
13340This feature is incomplete and not yet intended for general use.
13341
13342This implements experimental, Edition-dependent match ergonomics under consideration for inclusion
13343in Rust, allowing `&` patterns in more places. For example:
13344```rust,edition2024
13345#![feature(ref_pat_eat_one_layer_2024_structural)]
13346#![allow(incomplete_features)]
13347#
13348# // Tests type equality in a way that avoids coercing `&&T` or `&mut T` to `&T`.
13349# trait Eq<T> {}
13350# impl<T> Eq<T> for T {}
13351# fn has_type<T>(_: impl Eq<T>) {}
13352
13353// `&` can match against a `ref` binding mode instead of a reference type:
13354let (x, &y) = &(0, 1);
13355has_type::<&u8>(x);
13356has_type::<u8>(y);
13357
13358// `&` can match against `&mut` references:
13359let &z = &mut 2;
13360has_type::<u8>(z);
13361```
13362
13363For specifics, see the corresponding typing rules for [Editions 2021 and earlier] and for
13364[Editions 2024 and later]. For more information on binding modes, see [The Rust Reference].
13365
13366For alternative experimental match ergonomics, see the feature
13367[`ref_pat_eat_one_layer_2024`](./ref-pat-eat-one-layer-2024.md).
13368
13369[Editions 2021 and earlier]: https://nadrieril.github.io/typing-rust-patterns/?compare=false&opts1=AQEBAQIBAQEBAAAAAAAAAAAAAAAAAAA%3D&mode=rules&do_cmp=false
13370[Editions 2024 and later]: https://nadrieril.github.io/typing-rust-patterns/?compare=false&opts1=AQEBAgEBAQEBAgIAAAAAAAAAAAAAAAA%3D&mode=rules&do_cmp=false
13371[The Rust Reference]: https://doc.rust-lang.org/reference/patterns.html#binding-modes
13372"##,
13373        default_severity: Severity::Allow,
13374        warn_since: None,
13375        deny_since: None,
13376    },
13377    Lint {
13378        label: "refcell_try_map",
13379        description: r##"# `refcell_try_map`
13380
13381
13382
13383The tracking issue for this feature is: [#143801]
13384
13385[#143801]: https://github.com/rust-lang/rust/issues/143801
13386
13387------------------------
13388"##,
13389        default_severity: Severity::Allow,
13390        warn_since: None,
13391        deny_since: None,
13392    },
13393    Lint {
13394        label: "register_tool",
13395        description: r##"# `register_tool`
13396
13397The tracking issue for this feature is: [#66079]
13398
13399[#66079]: https://github.com/rust-lang/rust/issues/66079
13400
13401------------------------
13402
13403The `register_tool` language feature informs the compiler that attributes in your code are meant to be used with tools other than the compiler itself. This can be useful if your code has semantic meaning without the external tool, but enables additional features when the tool is present.
13404
13405`register_tool` also allows configuring lint levels for external tools.
13406
13407Tool attributes are only meant for ignorable attributes. If your code *changes* meaning when the attribute is present, it should not use a tool attribute (because it cannot be compiled with anything other than the external tool, and in a sense is a fork of the language).
13408
13409------------------------
13410
13411`#![register_tool(tool)]` is an attribute, and is only valid at the crate root.
13412Attributes using the registered tool are checked for valid syntax, and lint attributes are checked to be in a valid format. However, the compiler cannot validate the semantics of the attribute, nor can it tell whether the configured lint is present in the external tool.
13413
13414Semantically, `clippy::*`, `rustdoc::*`, and `rustfmt::*` lints and attributes all behave as if `#![register_tool(clippy, rustdoc, rustfmt)]` were injected into the crate root, except that the `rustdoc` namespace can only be used for lints, not for attributes.
13415When compiling with `-Z unstable-features`, `rustc::*` lints can also be used. Like `rustdoc`, the `rustc` namespace can only be used with lints, not attributes.
13416
13417The compiler will emit an error if it encounters a lint/attribute whose namespace isn't a registered tool.
13418
13419Tool namespaces cannot be nested; `register_tool(main_tool::subtool)` is an error.
13420
13421## Examples
13422
13423Tool attributes:
13424
13425```rust
13426#![feature(register_tool)]
13427#![register_tool(c2rust)]
13428
13429// Mark which C header file this module was generated from.
13430#[c2rust::header_src = "operations.h"]
13431pub mod operations_h {
13432    use std::ffi::c_int;
13433
13434    // Mark which source line this struct was generated from.
13435    #[c2rust::src_loc = "11:0"]
13436    pub struct Point {
13437        pub x: c_int,
13438        pub y: c_int,
13439    }
13440}
13441```
13442
13443Tool lints:
13444
13445```
13446#![feature(register_tool)]
13447#![register_tool(bevy)]
13448#![deny(bevy::duplicate_bevy_dependencies)]
13449```
13450"##,
13451        default_severity: Severity::Allow,
13452        warn_since: None,
13453        deny_since: None,
13454    },
13455    Lint {
13456        label: "repr_simd",
13457        description: r##"# `repr_simd`
13458
13459Allows `repr(simd)` and importing the various simd intrinsics.
13460
13461The tracking issue for this feature is: [#27731]
13462
13463[#27731]: https://github.com/rust-lang/rust/issues/27731
13464
13465------------------------
13466"##,
13467        default_severity: Severity::Allow,
13468        warn_since: None,
13469        deny_since: None,
13470    },
13471    Lint {
13472        label: "restricted_std",
13473        description: r##"# `restricted_std`
13474
13475
13476
13477This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
13478
13479------------------------
13480"##,
13481        default_severity: Severity::Allow,
13482        warn_since: None,
13483        deny_since: None,
13484    },
13485    Lint {
13486        label: "result_option_map_or_default",
13487        description: r##"# `result_option_map_or_default`
13488
13489
13490
13491The tracking issue for this feature is: [#138099]
13492
13493[#138099]: https://github.com/rust-lang/rust/issues/138099
13494
13495------------------------
13496"##,
13497        default_severity: Severity::Allow,
13498        warn_since: None,
13499        deny_since: None,
13500    },
13501    Lint {
13502        label: "return_address",
13503        description: r##"# `return_address`
13504
13505
13506
13507The tracking issue for this feature is: [#154966]
13508
13509[#154966]: https://github.com/rust-lang/rust/issues/154966
13510
13511------------------------
13512"##,
13513        default_severity: Severity::Allow,
13514        warn_since: None,
13515        deny_since: None,
13516    },
13517    Lint {
13518        label: "return_type_notation",
13519        description: r##"# `return_type_notation`
13520
13521Allows bounding the return type of AFIT/RPITIT.
13522
13523The tracking issue for this feature is: [#109417]
13524
13525[#109417]: https://github.com/rust-lang/rust/issues/109417
13526
13527------------------------
13528"##,
13529        default_severity: Severity::Allow,
13530        warn_since: None,
13531        deny_since: None,
13532    },
13533    Lint {
13534        label: "rev_into_inner",
13535        description: r##"# `rev_into_inner`
13536
13537
13538
13539The tracking issue for this feature is: [#144277]
13540
13541[#144277]: https://github.com/rust-lang/rust/issues/144277
13542
13543------------------------
13544"##,
13545        default_severity: Severity::Allow,
13546        warn_since: None,
13547        deny_since: None,
13548    },
13549    Lint {
13550        label: "riscv_target_feature",
13551        description: r##"# `riscv_target_feature`
13552
13553Target features on riscv.
13554
13555The tracking issue for this feature is: [#150257]
13556
13557[#150257]: https://github.com/rust-lang/rust/issues/150257
13558
13559------------------------
13560"##,
13561        default_severity: Severity::Allow,
13562        warn_since: None,
13563        deny_since: None,
13564    },
13565    Lint {
13566        label: "rt",
13567        description: r##"# `rt`
13568
13569This feature is internal to the Rust compiler and is not intended for general use.
13570
13571------------------------
13572"##,
13573        default_severity: Severity::Allow,
13574        warn_since: None,
13575        deny_since: None,
13576    },
13577    Lint {
13578        label: "rtm_target_feature",
13579        description: r##"# `rtm_target_feature`
13580
13581The rtm target feature on x86.
13582
13583The tracking issue for this feature is: [#150258]
13584
13585[#150258]: https://github.com/rust-lang/rust/issues/150258
13586
13587------------------------
13588"##,
13589        default_severity: Severity::Allow,
13590        warn_since: None,
13591        deny_since: None,
13592    },
13593    Lint {
13594        label: "rust_cold_cc",
13595        description: r##"# `rust_cold_cc`
13596
13597Allows `extern "rust-cold"`.
13598
13599The tracking issue for this feature is: [#97544]
13600
13601[#97544]: https://github.com/rust-lang/rust/issues/97544
13602
13603------------------------
13604"##,
13605        default_severity: Severity::Allow,
13606        warn_since: None,
13607        deny_since: None,
13608    },
13609    Lint {
13610        label: "rust_preserve_none_cc",
13611        description: r##"# `rust_preserve_none_cc`
13612
13613Allows `extern "rust-preserve-none"`.
13614
13615The tracking issue for this feature is: [#151401]
13616
13617[#151401]: https://github.com/rust-lang/rust/issues/151401
13618
13619------------------------
13620"##,
13621        default_severity: Severity::Allow,
13622        warn_since: None,
13623        deny_since: None,
13624    },
13625    Lint {
13626        label: "rustc_attrs",
13627        description: r##"# `rustc_attrs`
13628
13629This feature has no tracking issue, and is therefore internal to
13630the compiler, not being intended for general use.
13631
13632Note: `rustc_attrs` enables many rustc-internal attributes and this page
13633only discuss a few of them.
13634
13635------------------------
13636
13637The `rustc_attrs` feature allows debugging rustc type layouts by using
13638`#[rustc_dump_layout(...)]` to debug layout at compile time (it even works
13639with `cargo check`) as an alternative to `rustc -Z print-type-sizes`
13640that is way more verbose.
13641
13642Options provided by `#[rustc_dump_layout(...)]` are `backend_repr`, `align`,
13643`debug`, `homogeneous_aggregate` and `size`.
13644Note that it only works on sized types without generics.
13645
13646## Examples
13647
13648```rust,compile_fail
13649#![feature(rustc_attrs)]
13650
13651#[rustc_dump_layout(backend_repr, size)]
13652pub enum X {
13653    Y(u8, u8, u8),
13654    Z(isize),
13655}
13656```
13657
13658When that is compiled, the compiler will error with something like
13659
13660```text
13661error: backend_repr: Aggregate { sized: true }
13662 --> src/lib.rs:4:1
13663  |
136644 | / pub enum T {
136655 | |     Y(u8, u8, u8),
136666 | |     Z(isize),
136677 | | }
13668  | |_^
13669
13670error: size: Size { raw: 16 }
13671 --> src/lib.rs:4:1
13672  |
136734 | / pub enum T {
136745 | |     Y(u8, u8, u8),
136756 | |     Z(isize),
136767 | | }
13677  | |_^
13678
13679error: aborting due to 2 previous errors
13680```
13681"##,
13682        default_severity: Severity::Allow,
13683        warn_since: None,
13684        deny_since: None,
13685    },
13686    Lint {
13687        label: "rustc_private",
13688        description: r##"# `rustc_private`
13689
13690The tracking issue for this feature is: [#27812]
13691
13692[#27812]: https://github.com/rust-lang/rust/issues/27812
13693
13694------------------------
13695
13696This feature allows access to unstable internal compiler crates such as `rustc_driver`.
13697
13698The presence of this feature changes the way the linkage format for dylibs is calculated in a way
13699that is necessary for linking against dylibs that statically link `std` (such as `rustc_driver`).
13700This makes this feature "viral" in linkage; its use in a given crate makes its use required in
13701dependent crates which link to it (including integration tests, which are built as separate crates).
13702
13703## Common linker failures related to missing LLVM libraries
13704
13705### When using `rustc-private` with Official Toolchains
13706
13707When using the `rustc_private` feature with official toolchains distributed via rustup, you'll need to install:
13708
137091. The `rustc-dev` component (provides compiler libraries)
137102. The `llvm-tools` component (provides LLVM libraries needed for linking)
13711
13712You can install these components using `rustup`:
13713
13714```text
13715rustup component add rustc-dev llvm-tools
13716```
13717
13718Without the `llvm-tools` component, you may encounter linking errors like:
13719
13720```text
13721error: linking with `cc` failed: exit status: 1
13722  |
13723  = note: rust-lld: error: unable to find library -lLLVM-{version}
13724```
13725
13726### When using `rustc-private` with Custom Toolchains
13727
13728For custom-built toolchains or environments not using rustup, different configuration may be required:
13729
13730- Ensure LLVM libraries are available in your library search paths
13731- You might need to configure library paths explicitly depending on your LLVM installation
13732"##,
13733        default_severity: Severity::Allow,
13734        warn_since: None,
13735        deny_since: None,
13736    },
13737    Lint {
13738        label: "rustdoc_internals",
13739        description: r##"# `rustdoc_internals`
13740
13741Allows using internal rustdoc features like `doc(keyword)`.
13742
13743The tracking issue for this feature is: [#90418]
13744
13745[#90418]: https://github.com/rust-lang/rust/issues/90418
13746
13747------------------------
13748"##,
13749        default_severity: Severity::Allow,
13750        warn_since: None,
13751        deny_since: None,
13752    },
13753    Lint {
13754        label: "rustdoc_missing_doc_code_examples",
13755        description: r##"# `rustdoc_missing_doc_code_examples`
13756
13757Allows using the `rustdoc::missing_doc_code_examples` lint
13758
13759The tracking issue for this feature is: [#101730]
13760
13761[#101730]: https://github.com/rust-lang/rust/issues/101730
13762
13763------------------------
13764"##,
13765        default_severity: Severity::Allow,
13766        warn_since: None,
13767        deny_since: None,
13768    },
13769    Lint {
13770        label: "rwlock_data_ptr",
13771        description: r##"# `rwlock_data_ptr`
13772
13773
13774
13775The tracking issue for this feature is: [#140368]
13776
13777[#140368]: https://github.com/rust-lang/rust/issues/140368
13778
13779------------------------
13780"##,
13781        default_severity: Severity::Allow,
13782        warn_since: None,
13783        deny_since: None,
13784    },
13785    Lint {
13786        label: "s390x_target_feature",
13787        description: r##"# `s390x_target_feature`
13788
13789Target features on s390x.
13790
13791The tracking issue for this feature is: [#150259]
13792
13793[#150259]: https://github.com/rust-lang/rust/issues/150259
13794
13795------------------------
13796"##,
13797        default_severity: Severity::Allow,
13798        warn_since: None,
13799        deny_since: None,
13800    },
13801    Lint {
13802        label: "sanitize",
13803        description: r##"# `sanitize`
13804
13805The tracking issue for this feature is: [#39699]
13806
13807[#39699]: https://github.com/rust-lang/rust/issues/39699
13808
13809------------------------
13810
13811The `sanitize` attribute can be used to selectively disable or enable sanitizer
13812instrumentation in an annotated function. This might be useful to: avoid
13813instrumentation overhead in a performance critical function, or avoid
13814instrumenting code that contains constructs unsupported by given sanitizer.
13815
13816The precise effect of this annotation depends on particular sanitizer in use.
13817For example, with `sanitize(thread = "off")`, the thread sanitizer will no
13818longer instrument non-atomic store / load operations, but it will instrument
13819atomic operations to avoid reporting false positives and provide meaning full
13820stack traces.
13821
13822This attribute was previously named `no_sanitize`.
13823
13824## Examples
13825
13826``` rust
13827#![feature(sanitize)]
13828
13829#[sanitize(address = "off")]
13830fn foo() {
13831  // ...
13832}
13833```
13834
13835It is also possible to disable sanitizers for entire modules and enable them
13836for single items or functions.
13837
13838```rust
13839#![feature(sanitize)]
13840
13841#[sanitize(address = "off")]
13842mod foo {
13843  fn unsanitized() {
13844    // ...
13845  }
13846
13847  #[sanitize(address = "on")]
13848  fn sanitized() {
13849    // ...
13850  }
13851}
13852```
13853
13854It's also applicable to impl blocks.
13855
13856```rust
13857#![feature(sanitize)]
13858
13859trait MyTrait {
13860  fn foo(&self);
13861  fn bar(&self);
13862}
13863
13864#[sanitize(address = "off")]
13865impl MyTrait for () {
13866  fn foo(&self) {
13867    // ...
13868  }
13869
13870  #[sanitize(address = "on")]
13871  fn bar(&self) {
13872    // ...
13873  }
13874}
13875```
13876"##,
13877        default_severity: Severity::Allow,
13878        warn_since: None,
13879        deny_since: None,
13880    },
13881    Lint {
13882        label: "sealed",
13883        description: r##"# `sealed`
13884
13885
13886
13887This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
13888
13889------------------------
13890"##,
13891        default_severity: Severity::Allow,
13892        warn_since: None,
13893        deny_since: None,
13894    },
13895    Lint {
13896        label: "seek_io_take_position",
13897        description: r##"# `seek_io_take_position`
13898
13899
13900
13901The tracking issue for this feature is: [#97227]
13902
13903[#97227]: https://github.com/rust-lang/rust/issues/97227
13904
13905------------------------
13906"##,
13907        default_severity: Severity::Allow,
13908        warn_since: None,
13909        deny_since: None,
13910    },
13911    Lint {
13912        label: "seek_stream_len",
13913        description: r##"# `seek_stream_len`
13914
13915
13916
13917The tracking issue for this feature is: [#59359]
13918
13919[#59359]: https://github.com/rust-lang/rust/issues/59359
13920
13921------------------------
13922"##,
13923        default_severity: Severity::Allow,
13924        warn_since: None,
13925        deny_since: None,
13926    },
13927    Lint {
13928        label: "set_permissions_nofollow",
13929        description: r##"# `set_permissions_nofollow`
13930
13931
13932
13933The tracking issue for this feature is: [#141607]
13934
13935[#141607]: https://github.com/rust-lang/rust/issues/141607
13936
13937------------------------
13938"##,
13939        default_severity: Severity::Allow,
13940        warn_since: None,
13941        deny_since: None,
13942    },
13943    Lint {
13944        label: "set_ptr_value",
13945        description: r##"# `set_ptr_value`
13946
13947
13948
13949The tracking issue for this feature is: [#75091]
13950
13951[#75091]: https://github.com/rust-lang/rust/issues/75091
13952
13953------------------------
13954"##,
13955        default_severity: Severity::Allow,
13956        warn_since: None,
13957        deny_since: None,
13958    },
13959    Lint {
13960        label: "setgroups",
13961        description: r##"# `setgroups`
13962
13963
13964
13965The tracking issue for this feature is: [#90747]
13966
13967[#90747]: https://github.com/rust-lang/rust/issues/90747
13968
13969------------------------
13970"##,
13971        default_severity: Severity::Allow,
13972        warn_since: None,
13973        deny_since: None,
13974    },
13975    Lint {
13976        label: "sgx_platform",
13977        description: r##"# `sgx_platform`
13978
13979
13980
13981The tracking issue for this feature is: [#56975]
13982
13983[#56975]: https://github.com/rust-lang/rust/issues/56975
13984
13985------------------------
13986"##,
13987        default_severity: Severity::Allow,
13988        warn_since: None,
13989        deny_since: None,
13990    },
13991    Lint {
13992        label: "signed_bigint_helpers",
13993        description: r##"# `signed_bigint_helpers`
13994
13995
13996
13997The tracking issue for this feature is: [#151989]
13998
13999[#151989]: https://github.com/rust-lang/rust/issues/151989
14000
14001------------------------
14002"##,
14003        default_severity: Severity::Allow,
14004        warn_since: None,
14005        deny_since: None,
14006    },
14007    Lint {
14008        label: "simd_ffi",
14009        description: r##"# `simd_ffi`
14010
14011Allows the use of SIMD types in functions declared in `extern` blocks.
14012
14013The tracking issue for this feature is: [#27731]
14014
14015[#27731]: https://github.com/rust-lang/rust/issues/27731
14016
14017------------------------
14018"##,
14019        default_severity: Severity::Allow,
14020        warn_since: None,
14021        deny_since: None,
14022    },
14023    Lint {
14024        label: "sized_hierarchy",
14025        description: r##"# `sized_hierarchy`
14026
14027Introduces a hierarchy of `Sized` traits (RFC 3729).
14028
14029The tracking issue for this feature is: [#144404]
14030
14031[#144404]: https://github.com/rust-lang/rust/issues/144404
14032
14033------------------------
14034"##,
14035        default_severity: Severity::Allow,
14036        warn_since: None,
14037        deny_since: None,
14038    },
14039    Lint {
14040        label: "sized_type_properties",
14041        description: r##"# `sized_type_properties`
14042
14043
14044
14045This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
14046
14047------------------------
14048"##,
14049        default_severity: Severity::Allow,
14050        warn_since: None,
14051        deny_since: None,
14052    },
14053    Lint {
14054        label: "slice_concat_ext",
14055        description: r##"# `slice_concat_ext`
14056
14057
14058
14059The tracking issue for this feature is: [#27747]
14060
14061[#27747]: https://github.com/rust-lang/rust/issues/27747
14062
14063------------------------
14064"##,
14065        default_severity: Severity::Allow,
14066        warn_since: None,
14067        deny_since: None,
14068    },
14069    Lint {
14070        label: "slice_concat_trait",
14071        description: r##"# `slice_concat_trait`
14072
14073
14074
14075The tracking issue for this feature is: [#27747]
14076
14077[#27747]: https://github.com/rust-lang/rust/issues/27747
14078
14079------------------------
14080"##,
14081        default_severity: Severity::Allow,
14082        warn_since: None,
14083        deny_since: None,
14084    },
14085    Lint {
14086        label: "slice_from_ptr_range",
14087        description: r##"# `slice_from_ptr_range`
14088
14089
14090
14091The tracking issue for this feature is: [#89792]
14092
14093[#89792]: https://github.com/rust-lang/rust/issues/89792
14094
14095------------------------
14096"##,
14097        default_severity: Severity::Allow,
14098        warn_since: None,
14099        deny_since: None,
14100    },
14101    Lint {
14102        label: "slice_index_methods",
14103        description: r##"# `slice_index_methods`
14104
14105
14106
14107This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
14108
14109------------------------
14110"##,
14111        default_severity: Severity::Allow,
14112        warn_since: None,
14113        deny_since: None,
14114    },
14115    Lint {
14116        label: "slice_internals",
14117        description: r##"# `slice_internals`
14118
14119
14120
14121This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
14122
14123------------------------
14124"##,
14125        default_severity: Severity::Allow,
14126        warn_since: None,
14127        deny_since: None,
14128    },
14129    Lint {
14130        label: "slice_iter_mut_as_mut_slice",
14131        description: r##"# `slice_iter_mut_as_mut_slice`
14132
14133
14134
14135The tracking issue for this feature is: [#93079]
14136
14137[#93079]: https://github.com/rust-lang/rust/issues/93079
14138
14139------------------------
14140"##,
14141        default_severity: Severity::Allow,
14142        warn_since: None,
14143        deny_since: None,
14144    },
14145    Lint {
14146        label: "slice_partial_sort_unstable",
14147        description: r##"# `slice_partial_sort_unstable`
14148
14149
14150
14151The tracking issue for this feature is: [#149046]
14152
14153[#149046]: https://github.com/rust-lang/rust/issues/149046
14154
14155------------------------
14156"##,
14157        default_severity: Severity::Allow,
14158        warn_since: None,
14159        deny_since: None,
14160    },
14161    Lint {
14162        label: "slice_partition_dedup",
14163        description: r##"# `slice_partition_dedup`
14164
14165
14166
14167The tracking issue for this feature is: [#54279]
14168
14169[#54279]: https://github.com/rust-lang/rust/issues/54279
14170
14171------------------------
14172"##,
14173        default_severity: Severity::Allow,
14174        warn_since: None,
14175        deny_since: None,
14176    },
14177    Lint {
14178        label: "slice_pattern",
14179        description: r##"# `slice_pattern`
14180
14181
14182
14183The tracking issue for this feature is: [#56345]
14184
14185[#56345]: https://github.com/rust-lang/rust/issues/56345
14186
14187------------------------
14188"##,
14189        default_severity: Severity::Allow,
14190        warn_since: None,
14191        deny_since: None,
14192    },
14193    Lint {
14194        label: "slice_ptr_get",
14195        description: r##"# `slice_ptr_get`
14196
14197
14198
14199The tracking issue for this feature is: [#74265]
14200
14201[#74265]: https://github.com/rust-lang/rust/issues/74265
14202
14203------------------------
14204"##,
14205        default_severity: Severity::Allow,
14206        warn_since: None,
14207        deny_since: None,
14208    },
14209    Lint {
14210        label: "slice_range",
14211        description: r##"# `slice_range`
14212
14213
14214
14215The tracking issue for this feature is: [#76393]
14216
14217[#76393]: https://github.com/rust-lang/rust/issues/76393
14218
14219------------------------
14220"##,
14221        default_severity: Severity::Allow,
14222        warn_since: None,
14223        deny_since: None,
14224    },
14225    Lint {
14226        label: "slice_shift",
14227        description: r##"# `slice_shift`
14228
14229
14230
14231The tracking issue for this feature is: [#151772]
14232
14233[#151772]: https://github.com/rust-lang/rust/issues/151772
14234
14235------------------------
14236"##,
14237        default_severity: Severity::Allow,
14238        warn_since: None,
14239        deny_since: None,
14240    },
14241    Lint {
14242        label: "slice_split_once",
14243        description: r##"# `slice_split_once`
14244
14245
14246
14247The tracking issue for this feature is: [#112811]
14248
14249[#112811]: https://github.com/rust-lang/rust/issues/112811
14250
14251------------------------
14252"##,
14253        default_severity: Severity::Allow,
14254        warn_since: None,
14255        deny_since: None,
14256    },
14257    Lint {
14258        label: "slice_swap_unchecked",
14259        description: r##"# `slice_swap_unchecked`
14260
14261
14262
14263The tracking issue for this feature is: [#88539]
14264
14265[#88539]: https://github.com/rust-lang/rust/issues/88539
14266
14267------------------------
14268"##,
14269        default_severity: Severity::Allow,
14270        warn_since: None,
14271        deny_since: None,
14272    },
14273    Lint {
14274        label: "sliceindex_wrappers",
14275        description: r##"# `sliceindex_wrappers`
14276
14277
14278
14279The tracking issue for this feature is: [#146179]
14280
14281[#146179]: https://github.com/rust-lang/rust/issues/146179
14282
14283------------------------
14284"##,
14285        default_severity: Severity::Allow,
14286        warn_since: None,
14287        deny_since: None,
14288    },
14289    Lint {
14290        label: "smart_pointer_try_map",
14291        description: r##"# `smart_pointer_try_map`
14292
14293
14294
14295The tracking issue for this feature is: [#144419]
14296
14297[#144419]: https://github.com/rust-lang/rust/issues/144419
14298
14299------------------------
14300"##,
14301        default_severity: Severity::Allow,
14302        warn_since: None,
14303        deny_since: None,
14304    },
14305    Lint {
14306        label: "solid_ext",
14307        description: r##"# `solid_ext`
14308
14309
14310
14311This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
14312
14313------------------------
14314"##,
14315        default_severity: Severity::Allow,
14316        warn_since: None,
14317        deny_since: None,
14318    },
14319    Lint {
14320        label: "sort_floats",
14321        description: r##"# `sort_floats`
14322
14323
14324
14325The tracking issue for this feature is: [#93396]
14326
14327[#93396]: https://github.com/rust-lang/rust/issues/93396
14328
14329------------------------
14330"##,
14331        default_severity: Severity::Allow,
14332        warn_since: None,
14333        deny_since: None,
14334    },
14335    Lint {
14336        label: "sparc_target_feature",
14337        description: r##"# `sparc_target_feature`
14338
14339Target features on sparc.
14340
14341The tracking issue for this feature is: [#132783]
14342
14343[#132783]: https://github.com/rust-lang/rust/issues/132783
14344
14345------------------------
14346"##,
14347        default_severity: Severity::Allow,
14348        warn_since: None,
14349        deny_since: None,
14350    },
14351    Lint {
14352        label: "specialization",
14353        description: r##"# `specialization`
14354
14355Allows specialization of implementations (RFC 1210).
14356
14357The tracking issue for this feature is: [#31844]
14358
14359[#31844]: https://github.com/rust-lang/rust/issues/31844
14360
14361------------------------
14362"##,
14363        default_severity: Severity::Allow,
14364        warn_since: None,
14365        deny_since: None,
14366    },
14367    Lint {
14368        label: "split_array",
14369        description: r##"# `split_array`
14370
14371
14372
14373The tracking issue for this feature is: [#90091]
14374
14375[#90091]: https://github.com/rust-lang/rust/issues/90091
14376
14377------------------------
14378"##,
14379        default_severity: Severity::Allow,
14380        warn_since: None,
14381        deny_since: None,
14382    },
14383    Lint {
14384        label: "split_as_slice",
14385        description: r##"# `split_as_slice`
14386
14387
14388
14389The tracking issue for this feature is: [#96137]
14390
14391[#96137]: https://github.com/rust-lang/rust/issues/96137
14392
14393------------------------
14394"##,
14395        default_severity: Severity::Allow,
14396        warn_since: None,
14397        deny_since: None,
14398    },
14399    Lint {
14400        label: "staged_api",
14401        description: r##"# `staged_api`
14402
14403Allows using the `#[stable]` and `#[unstable]` attributes.
14404
14405This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
14406
14407------------------------
14408"##,
14409        default_severity: Severity::Allow,
14410        warn_since: None,
14411        deny_since: None,
14412    },
14413    Lint {
14414        label: "static_align",
14415        description: r##"# `static_align`
14416
14417Allows using `#[rustc_align_static(...)]` on static items.
14418
14419The tracking issue for this feature is: [#146177]
14420
14421[#146177]: https://github.com/rust-lang/rust/issues/146177
14422
14423------------------------
14424"##,
14425        default_severity: Severity::Allow,
14426        warn_since: None,
14427        deny_since: None,
14428    },
14429    Lint {
14430        label: "std_internals",
14431        description: r##"# `std_internals`
14432
14433
14434
14435This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
14436
14437------------------------
14438"##,
14439        default_severity: Severity::Allow,
14440        warn_since: None,
14441        deny_since: None,
14442    },
14443    Lint {
14444        label: "stdarch_aarch64_feature_detection",
14445        description: r##"# `stdarch_aarch64_feature_detection`
14446
14447
14448
14449The tracking issue for this feature is: [#127764]
14450
14451[#127764]: https://github.com/rust-lang/rust/issues/127764
14452
14453------------------------
14454"##,
14455        default_severity: Severity::Allow,
14456        warn_since: None,
14457        deny_since: None,
14458    },
14459    Lint {
14460        label: "stdarch_arm_feature_detection",
14461        description: r##"# `stdarch_arm_feature_detection`
14462
14463
14464
14465The tracking issue for this feature is: [#111190]
14466
14467[#111190]: https://github.com/rust-lang/rust/issues/111190
14468
14469------------------------
14470"##,
14471        default_severity: Severity::Allow,
14472        warn_since: None,
14473        deny_since: None,
14474    },
14475    Lint {
14476        label: "stdarch_internal",
14477        description: r##"# `stdarch_internal`
14478
14479
14480
14481This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
14482
14483------------------------
14484"##,
14485        default_severity: Severity::Allow,
14486        warn_since: None,
14487        deny_since: None,
14488    },
14489    Lint {
14490        label: "stdarch_loongarch_feature_detection",
14491        description: r##"# `stdarch_loongarch_feature_detection`
14492
14493
14494
14495The tracking issue for this feature is: [#117425]
14496
14497[#117425]: https://github.com/rust-lang/rust/issues/117425
14498
14499------------------------
14500"##,
14501        default_severity: Severity::Allow,
14502        warn_since: None,
14503        deny_since: None,
14504    },
14505    Lint {
14506        label: "stdarch_mips_feature_detection",
14507        description: r##"# `stdarch_mips_feature_detection`
14508
14509
14510
14511The tracking issue for this feature is: [#111188]
14512
14513[#111188]: https://github.com/rust-lang/rust/issues/111188
14514
14515------------------------
14516"##,
14517        default_severity: Severity::Allow,
14518        warn_since: None,
14519        deny_since: None,
14520    },
14521    Lint {
14522        label: "stdarch_powerpc_feature_detection",
14523        description: r##"# `stdarch_powerpc_feature_detection`
14524
14525
14526
14527The tracking issue for this feature is: [#111191]
14528
14529[#111191]: https://github.com/rust-lang/rust/issues/111191
14530
14531------------------------
14532"##,
14533        default_severity: Severity::Allow,
14534        warn_since: None,
14535        deny_since: None,
14536    },
14537    Lint {
14538        label: "stdarch_riscv_feature_detection",
14539        description: r##"# `stdarch_riscv_feature_detection`
14540
14541
14542
14543The tracking issue for this feature is: [#111192]
14544
14545[#111192]: https://github.com/rust-lang/rust/issues/111192
14546
14547------------------------
14548"##,
14549        default_severity: Severity::Allow,
14550        warn_since: None,
14551        deny_since: None,
14552    },
14553    Lint {
14554        label: "stdio_fd_consts",
14555        description: r##"# `stdio_fd_consts`
14556
14557
14558
14559The tracking issue for this feature is: [#150836]
14560
14561[#150836]: https://github.com/rust-lang/rust/issues/150836
14562
14563------------------------
14564"##,
14565        default_severity: Severity::Allow,
14566        warn_since: None,
14567        deny_since: None,
14568    },
14569    Lint {
14570        label: "stdio_makes_pipe",
14571        description: r##"# `stdio_makes_pipe`
14572
14573
14574
14575The tracking issue for this feature is: [#98288]
14576
14577[#98288]: https://github.com/rust-lang/rust/issues/98288
14578
14579------------------------
14580"##,
14581        default_severity: Severity::Allow,
14582        warn_since: None,
14583        deny_since: None,
14584    },
14585    Lint {
14586        label: "stdio_swap",
14587        description: r##"# `stdio_swap`
14588
14589
14590
14591The tracking issue for this feature is: [#150667]
14592
14593[#150667]: https://github.com/rust-lang/rust/issues/150667
14594
14595------------------------
14596"##,
14597        default_severity: Severity::Allow,
14598        warn_since: None,
14599        deny_since: None,
14600    },
14601    Lint {
14602        label: "step_trait",
14603        description: r##"# `step_trait`
14604
14605
14606
14607The tracking issue for this feature is: [#42168]
14608
14609[#42168]: https://github.com/rust-lang/rust/issues/42168
14610
14611------------------------
14612"##,
14613        default_severity: Severity::Allow,
14614        warn_since: None,
14615        deny_since: None,
14616    },
14617    Lint {
14618        label: "stmt_expr_attributes",
14619        description: r##"# `stmt_expr_attributes`
14620
14621Allows attributes on expressions and non-item statements.
14622
14623The tracking issue for this feature is: [#15701]
14624
14625[#15701]: https://github.com/rust-lang/rust/issues/15701
14626
14627------------------------
14628"##,
14629        default_severity: Severity::Allow,
14630        warn_since: None,
14631        deny_since: None,
14632    },
14633    Lint {
14634        label: "str_as_str",
14635        description: r##"# `str_as_str`
14636
14637
14638
14639The tracking issue for this feature is: [#130366]
14640
14641[#130366]: https://github.com/rust-lang/rust/issues/130366
14642
14643------------------------
14644"##,
14645        default_severity: Severity::Allow,
14646        warn_since: None,
14647        deny_since: None,
14648    },
14649    Lint {
14650        label: "str_from_raw_parts",
14651        description: r##"# `str_from_raw_parts`
14652
14653
14654
14655The tracking issue for this feature is: [#119206]
14656
14657[#119206]: https://github.com/rust-lang/rust/issues/119206
14658
14659------------------------
14660"##,
14661        default_severity: Severity::Allow,
14662        warn_since: None,
14663        deny_since: None,
14664    },
14665    Lint {
14666        label: "str_from_utf16_endian",
14667        description: r##"# `str_from_utf16_endian`
14668
14669
14670
14671The tracking issue for this feature is: [#116258]
14672
14673[#116258]: https://github.com/rust-lang/rust/issues/116258
14674
14675------------------------
14676"##,
14677        default_severity: Severity::Allow,
14678        warn_since: None,
14679        deny_since: None,
14680    },
14681    Lint {
14682        label: "str_internals",
14683        description: r##"# `str_internals`
14684
14685This feature is internal to the Rust compiler and is not intended for general use.
14686
14687------------------------
14688"##,
14689        default_severity: Severity::Allow,
14690        warn_since: None,
14691        deny_since: None,
14692    },
14693    Lint {
14694        label: "str_lines_remainder",
14695        description: r##"# `str_lines_remainder`
14696
14697
14698
14699The tracking issue for this feature is: [#77998]
14700
14701[#77998]: https://github.com/rust-lang/rust/issues/77998
14702
14703------------------------
14704"##,
14705        default_severity: Severity::Allow,
14706        warn_since: None,
14707        deny_since: None,
14708    },
14709    Lint {
14710        label: "str_split_inclusive_remainder",
14711        description: r##"# `str_split_inclusive_remainder`
14712
14713
14714
14715The tracking issue for this feature is: [#77998]
14716
14717[#77998]: https://github.com/rust-lang/rust/issues/77998
14718
14719------------------------
14720"##,
14721        default_severity: Severity::Allow,
14722        warn_since: None,
14723        deny_since: None,
14724    },
14725    Lint {
14726        label: "str_split_remainder",
14727        description: r##"# `str_split_remainder`
14728
14729
14730
14731The tracking issue for this feature is: [#77998]
14732
14733[#77998]: https://github.com/rust-lang/rust/issues/77998
14734
14735------------------------
14736"##,
14737        default_severity: Severity::Allow,
14738        warn_since: None,
14739        deny_since: None,
14740    },
14741    Lint {
14742        label: "str_split_whitespace_remainder",
14743        description: r##"# `str_split_whitespace_remainder`
14744
14745
14746
14747The tracking issue for this feature is: [#77998]
14748
14749[#77998]: https://github.com/rust-lang/rust/issues/77998
14750
14751------------------------
14752"##,
14753        default_severity: Severity::Allow,
14754        warn_since: None,
14755        deny_since: None,
14756    },
14757    Lint {
14758        label: "strict_provenance_lints",
14759        description: r##"# `strict_provenance_lints`
14760
14761The tracking issue for this feature is: [#130351]
14762
14763[#130351]: https://github.com/rust-lang/rust/issues/130351
14764-----
14765
14766The `strict_provenance_lints` feature allows to enable the `fuzzy_provenance_casts` and `lossy_provenance_casts` lints.
14767These lint on casts between integers and pointers, that are recommended against or invalid in the strict provenance model.
14768
14769## Example
14770
14771```rust
14772#![feature(strict_provenance_lints)]
14773#![warn(fuzzy_provenance_casts)]
14774
14775fn main() {
14776    let _dangling = 16_usize as *const u8;
14777    //~^ WARNING: strict provenance disallows casting integer `usize` to pointer `*const u8`
14778}
14779```
14780"##,
14781        default_severity: Severity::Allow,
14782        warn_since: None,
14783        deny_since: None,
14784    },
14785    Lint {
14786        label: "string_from_utf8_lossy_owned",
14787        description: r##"# `string_from_utf8_lossy_owned`
14788
14789
14790
14791The tracking issue for this feature is: [#129436]
14792
14793[#129436]: https://github.com/rust-lang/rust/issues/129436
14794
14795------------------------
14796"##,
14797        default_severity: Severity::Allow,
14798        warn_since: None,
14799        deny_since: None,
14800    },
14801    Lint {
14802        label: "string_into_chars",
14803        description: r##"# `string_into_chars`
14804
14805
14806
14807The tracking issue for this feature is: [#133125]
14808
14809[#133125]: https://github.com/rust-lang/rust/issues/133125
14810
14811------------------------
14812"##,
14813        default_severity: Severity::Allow,
14814        warn_since: None,
14815        deny_since: None,
14816    },
14817    Lint {
14818        label: "string_remove_matches",
14819        description: r##"# `string_remove_matches`
14820
14821
14822
14823The tracking issue for this feature is: [#72826]
14824
14825[#72826]: https://github.com/rust-lang/rust/issues/72826
14826
14827------------------------
14828"##,
14829        default_severity: Severity::Allow,
14830        warn_since: None,
14831        deny_since: None,
14832    },
14833    Lint {
14834        label: "string_replace_in_place",
14835        description: r##"# `string_replace_in_place`
14836
14837
14838
14839The tracking issue for this feature is: [#147949]
14840
14841[#147949]: https://github.com/rust-lang/rust/issues/147949
14842
14843------------------------
14844"##,
14845        default_severity: Severity::Allow,
14846        warn_since: None,
14847        deny_since: None,
14848    },
14849    Lint {
14850        label: "strip_circumfix",
14851        description: r##"# `strip_circumfix`
14852
14853
14854
14855The tracking issue for this feature is: [#147946]
14856
14857[#147946]: https://github.com/rust-lang/rust/issues/147946
14858
14859------------------------
14860"##,
14861        default_severity: Severity::Allow,
14862        warn_since: None,
14863        deny_since: None,
14864    },
14865    Lint {
14866        label: "structural_match",
14867        description: r##"# `structural_match`
14868
14869Allows using `#[structural_match]` which indicates that a type is structurally matchable. FIXME: Subsumed by trait `StructuralPartialEq`, cannot move to removed until a library feature with the same name exists.
14870
14871The tracking issue for this feature is: [#31434]
14872
14873[#31434]: https://github.com/rust-lang/rust/issues/31434
14874
14875------------------------
14876"##,
14877        default_severity: Severity::Allow,
14878        warn_since: None,
14879        deny_since: None,
14880    },
14881    Lint {
14882        label: "substr_range",
14883        description: r##"# `substr_range`
14884
14885
14886
14887The tracking issue for this feature is: [#126769]
14888
14889[#126769]: https://github.com/rust-lang/rust/issues/126769
14890
14891------------------------
14892"##,
14893        default_severity: Severity::Allow,
14894        warn_since: None,
14895        deny_since: None,
14896    },
14897    Lint {
14898        label: "super_let",
14899        description: r##"# `super_let`
14900
14901Allows `super let` statements.
14902
14903The tracking issue for this feature is: [#139076]
14904
14905[#139076]: https://github.com/rust-lang/rust/issues/139076
14906
14907------------------------
14908"##,
14909        default_severity: Severity::Allow,
14910        warn_since: None,
14911        deny_since: None,
14912    },
14913    Lint {
14914        label: "supertrait_item_shadowing",
14915        description: r##"# `supertrait_item_shadowing`
14916
14917Allows subtrait items to shadow supertrait items.
14918
14919The tracking issue for this feature is: [#89151]
14920
14921[#89151]: https://github.com/rust-lang/rust/issues/89151
14922
14923------------------------
14924"##,
14925        default_severity: Severity::Allow,
14926        warn_since: None,
14927        deny_since: None,
14928    },
14929    Lint {
14930        label: "sync_nonpoison",
14931        description: r##"# `sync_nonpoison`
14932
14933
14934
14935The tracking issue for this feature is: [#134645]
14936
14937[#134645]: https://github.com/rust-lang/rust/issues/134645
14938
14939------------------------
14940"##,
14941        default_severity: Severity::Allow,
14942        warn_since: None,
14943        deny_since: None,
14944    },
14945    Lint {
14946        label: "sync_poison_mod",
14947        description: r##"# `sync_poison_mod`
14948
14949
14950
14951The tracking issue for this feature is: [#134646]
14952
14953[#134646]: https://github.com/rust-lang/rust/issues/134646
14954
14955------------------------
14956"##,
14957        default_severity: Severity::Allow,
14958        warn_since: None,
14959        deny_since: None,
14960    },
14961    Lint {
14962        label: "sync_unsafe_cell",
14963        description: r##"# `sync_unsafe_cell`
14964
14965
14966
14967The tracking issue for this feature is: [#95439]
14968
14969[#95439]: https://github.com/rust-lang/rust/issues/95439
14970
14971------------------------
14972"##,
14973        default_severity: Severity::Allow,
14974        warn_since: None,
14975        deny_since: None,
14976    },
14977    Lint {
14978        label: "target_feature_inline_always",
14979        description: r##"# `target_feature_inline_always`
14980
14981Allows the use of target_feature when a function is marked inline(always).
14982
14983The tracking issue for this feature is: [#145574]
14984
14985[#145574]: https://github.com/rust-lang/rust/issues/145574
14986
14987------------------------
14988"##,
14989        default_severity: Severity::Allow,
14990        warn_since: None,
14991        deny_since: None,
14992    },
14993    Lint {
14994        label: "tcp_deferaccept",
14995        description: r##"# `tcp_deferaccept`
14996
14997
14998
14999The tracking issue for this feature is: [#119639]
15000
15001[#119639]: https://github.com/rust-lang/rust/issues/119639
15002
15003------------------------
15004"##,
15005        default_severity: Severity::Allow,
15006        warn_since: None,
15007        deny_since: None,
15008    },
15009    Lint {
15010        label: "tcp_keepalive",
15011        description: r##"# `tcp_keepalive`
15012
15013
15014
15015The tracking issue for this feature is: [#155889]
15016
15017[#155889]: https://github.com/rust-lang/rust/issues/155889
15018
15019------------------------
15020"##,
15021        default_severity: Severity::Allow,
15022        warn_since: None,
15023        deny_since: None,
15024    },
15025    Lint {
15026        label: "tcp_linger",
15027        description: r##"# `tcp_linger`
15028
15029
15030
15031The tracking issue for this feature is: [#88494]
15032
15033[#88494]: https://github.com/rust-lang/rust/issues/88494
15034
15035------------------------
15036"##,
15037        default_severity: Severity::Allow,
15038        warn_since: None,
15039        deny_since: None,
15040    },
15041    Lint {
15042        label: "tcplistener_into_incoming",
15043        description: r##"# `tcplistener_into_incoming`
15044
15045
15046
15047The tracking issue for this feature is: [#88373]
15048
15049[#88373]: https://github.com/rust-lang/rust/issues/88373
15050
15051------------------------
15052"##,
15053        default_severity: Severity::Allow,
15054        warn_since: None,
15055        deny_since: None,
15056    },
15057    Lint {
15058        label: "temporary_niche_types",
15059        description: r##"# `temporary_niche_types`
15060
15061
15062
15063This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
15064
15065------------------------
15066"##,
15067        default_severity: Severity::Allow,
15068        warn_since: None,
15069        deny_since: None,
15070    },
15071    Lint {
15072        label: "test",
15073        description: r##"# `test`
15074
15075The tracking issue for this feature is: None.
15076
15077------------------------
15078
15079The internals of the `test` crate are unstable, behind the `test` flag.  The
15080most widely used part of the `test` crate are benchmark tests, which can test
15081the performance of your code.  Let's make our `src/lib.rs` look like this
15082(comments elided):
15083
15084```rust,no_run
15085#![feature(test)]
15086
15087extern crate test;
15088
15089pub fn add_two(a: i32) -> i32 {
15090    a + 2
15091}
15092
15093#[cfg(test)]
15094mod tests {
15095    use super::*;
15096    use test::Bencher;
15097
15098    #[test]
15099    fn it_works() {
15100        assert_eq!(4, add_two(2));
15101    }
15102
15103    #[bench]
15104    fn bench_add_two(b: &mut Bencher) {
15105        b.iter(|| add_two(2));
15106    }
15107}
15108```
15109
15110Note the `test` feature gate, which enables this unstable feature.
15111
15112We've imported the `test` crate, which contains our benchmarking support.
15113We have a new function as well, with the `bench` attribute. Unlike regular
15114tests, which take no arguments, benchmark tests take a `&mut Bencher`. This
15115`Bencher` provides an `iter` method, which takes a closure. This closure
15116contains the code we'd like to benchmark.
15117
15118We can run benchmark tests with `cargo bench`:
15119
15120```bash
15121$ cargo bench
15122   Compiling adder v0.0.1 (file:///home/steve/tmp/adder)
15123     Running target/release/adder-91b3e234d4ed382a
15124
15125running 2 tests
15126test tests::it_works ... ignored
15127test tests::bench_add_two ... bench:         1 ns/iter (+/- 0)
15128
15129test result: ok. 0 passed; 0 failed; 1 ignored; 1 measured
15130```
15131
15132Our non-benchmark test was ignored. You may have noticed that `cargo bench`
15133takes a bit longer than `cargo test`. This is because Rust runs our benchmark
15134a number of times, and then takes the average. Because we're doing so little
15135work in this example, we have a `1 ns/iter (+/- 0)`, but this would show
15136the variance if there was one.
15137
15138Advice on writing benchmarks:
15139
15140
15141* Move setup code outside the `iter` loop; only put the part you want to measure inside
15142* Make the code do "the same thing" on each iteration; do not accumulate or change state
15143* Make the outer function idempotent too; the benchmark runner is likely to run
15144  it many times
15145*  Make the inner `iter` loop short and fast so benchmark runs are fast and the
15146   calibrator can adjust the run-length at fine resolution
15147* Make the code in the `iter` loop do something simple, to assist in pinpointing
15148  performance improvements (or regressions)
15149
15150## Gotcha: optimizations
15151
15152There's another tricky part to writing benchmarks: benchmarks compiled with
15153optimizations activated can be dramatically changed by the optimizer so that
15154the benchmark is no longer benchmarking what one expects. For example, the
15155compiler might recognize that some calculation has no external effects and
15156remove it entirely.
15157
15158```rust,no_run
15159#![feature(test)]
15160
15161extern crate test;
15162use test::Bencher;
15163
15164#[bench]
15165fn bench_xor_1000_ints(b: &mut Bencher) {
15166    b.iter(|| {
15167        (0..1000).fold(0, |old, new| old ^ new);
15168    });
15169}
15170```
15171
15172gives the following results
15173
15174```text
15175running 1 test
15176test bench_xor_1000_ints ... bench:         0 ns/iter (+/- 0)
15177
15178test result: ok. 0 passed; 0 failed; 0 ignored; 1 measured
15179```
15180
15181The benchmarking runner offers two ways to avoid this. Either, the closure that
15182the `iter` method receives can return an arbitrary value which forces the
15183optimizer to consider the result used and ensures it cannot remove the
15184computation entirely. This could be done for the example above by adjusting the
15185`b.iter` call to
15186
15187```rust
15188# struct X;
15189# impl X { fn iter<T, F>(&self, _: F) where F: FnMut() -> T {} } let b = X;
15190b.iter(|| {
15191    // Note lack of `;` (could also use an explicit `return`).
15192    (0..1000).fold(0, |old, new| old ^ new)
15193});
15194```
15195
15196Or, the other option is to call the generic `test::black_box` function, which
15197is an opaque "black box" to the optimizer and so forces it to consider any
15198argument as used.
15199
15200```rust
15201#![feature(test)]
15202
15203extern crate test;
15204
15205# fn main() {
15206# struct X;
15207# impl X { fn iter<T, F>(&self, _: F) where F: FnMut() -> T {} } let b = X;
15208b.iter(|| {
15209    let n = test::black_box(1000);
15210
15211    (0..n).fold(0, |a, b| a ^ b)
15212})
15213# }
15214```
15215
15216Neither of these read or modify the value, and are very cheap for small values.
15217Larger values can be passed indirectly to reduce overhead (e.g.
15218`black_box(&huge_struct)`).
15219
15220Performing either of the above changes gives the following benchmarking results
15221
15222```text
15223running 1 test
15224test bench_xor_1000_ints ... bench:       131 ns/iter (+/- 3)
15225
15226test result: ok. 0 passed; 0 failed; 0 ignored; 1 measured
15227```
15228
15229However, the optimizer can still modify a testcase in an undesirable manner
15230even when using either of the above.
15231"##,
15232        default_severity: Severity::Allow,
15233        warn_since: None,
15234        deny_since: None,
15235    },
15236    Lint {
15237        label: "test_incomplete_feature",
15238        description: r##"# `test_incomplete_feature`
15239
15240Perma-unstable, only used to test the `incomplete_features` lint.
15241
15242This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
15243
15244------------------------
15245"##,
15246        default_severity: Severity::Allow,
15247        warn_since: None,
15248        deny_since: None,
15249    },
15250    Lint {
15251        label: "test_unstable_lint",
15252        description: r##"# `test_unstable_lint`
15253
15254Added for testing unstable lints; perma-unstable.
15255
15256This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
15257
15258------------------------
15259"##,
15260        default_severity: Severity::Allow,
15261        warn_since: None,
15262        deny_since: None,
15263    },
15264    Lint {
15265        label: "thin_box",
15266        description: r##"# `thin_box`
15267
15268
15269
15270The tracking issue for this feature is: [#92791]
15271
15272[#92791]: https://github.com/rust-lang/rust/issues/92791
15273
15274------------------------
15275"##,
15276        default_severity: Severity::Allow,
15277        warn_since: None,
15278        deny_since: None,
15279    },
15280    Lint {
15281        label: "thread_id_value",
15282        description: r##"# `thread_id_value`
15283
15284
15285
15286The tracking issue for this feature is: [#67939]
15287
15288[#67939]: https://github.com/rust-lang/rust/issues/67939
15289
15290------------------------
15291"##,
15292        default_severity: Severity::Allow,
15293        warn_since: None,
15294        deny_since: None,
15295    },
15296    Lint {
15297        label: "thread_local",
15298        description: r##"# `thread_local`
15299
15300Allows using `#[thread_local]` on `static` items.
15301
15302The tracking issue for this feature is: [#29594]
15303
15304[#29594]: https://github.com/rust-lang/rust/issues/29594
15305
15306------------------------
15307"##,
15308        default_severity: Severity::Allow,
15309        warn_since: None,
15310        deny_since: None,
15311    },
15312    Lint {
15313        label: "thread_local_internals",
15314        description: r##"# `thread_local_internals`
15315
15316This feature is internal to the Rust compiler and is not intended for general use.
15317
15318------------------------
15319"##,
15320        default_severity: Severity::Allow,
15321        warn_since: None,
15322        deny_since: None,
15323    },
15324    Lint {
15325        label: "thread_raw",
15326        description: r##"# `thread_raw`
15327
15328
15329
15330The tracking issue for this feature is: [#97523]
15331
15332[#97523]: https://github.com/rust-lang/rust/issues/97523
15333
15334------------------------
15335"##,
15336        default_severity: Severity::Allow,
15337        warn_since: None,
15338        deny_since: None,
15339    },
15340    Lint {
15341        label: "thread_sleep_until",
15342        description: r##"# `thread_sleep_until`
15343
15344
15345
15346The tracking issue for this feature is: [#113752]
15347
15348[#113752]: https://github.com/rust-lang/rust/issues/113752
15349
15350------------------------
15351"##,
15352        default_severity: Severity::Allow,
15353        warn_since: None,
15354        deny_since: None,
15355    },
15356    Lint {
15357        label: "thread_spawn_hook",
15358        description: r##"# `thread_spawn_hook`
15359
15360
15361
15362The tracking issue for this feature is: [#132951]
15363
15364[#132951]: https://github.com/rust-lang/rust/issues/132951
15365
15366------------------------
15367"##,
15368        default_severity: Severity::Allow,
15369        warn_since: None,
15370        deny_since: None,
15371    },
15372    Lint {
15373        label: "time_saturating_systemtime",
15374        description: r##"# `time_saturating_systemtime`
15375
15376
15377
15378The tracking issue for this feature is: [#151199]
15379
15380[#151199]: https://github.com/rust-lang/rust/issues/151199
15381
15382------------------------
15383"##,
15384        default_severity: Severity::Allow,
15385        warn_since: None,
15386        deny_since: None,
15387    },
15388    Lint {
15389        label: "time_systemtime_limits",
15390        description: r##"# `time_systemtime_limits`
15391
15392
15393
15394The tracking issue for this feature is: [#149067]
15395
15396[#149067]: https://github.com/rust-lang/rust/issues/149067
15397
15398------------------------
15399"##,
15400        default_severity: Severity::Allow,
15401        warn_since: None,
15402        deny_since: None,
15403    },
15404    Lint {
15405        label: "titlecase",
15406        description: r##"# `titlecase`
15407
15408
15409
15410The tracking issue for this feature is: [#153892]
15411
15412[#153892]: https://github.com/rust-lang/rust/issues/153892
15413
15414------------------------
15415"##,
15416        default_severity: Severity::Allow,
15417        warn_since: None,
15418        deny_since: None,
15419    },
15420    Lint {
15421        label: "trace_macros",
15422        description: r##"# `trace_macros`
15423
15424The tracking issue for this feature is [#29598].
15425
15426[#29598]: https://github.com/rust-lang/rust/issues/29598
15427
15428------------------------
15429
15430With `trace_macros` you can trace the expansion of macros in your code.
15431
15432## Examples
15433
15434```rust
15435#![feature(trace_macros)]
15436
15437fn main() {
15438    trace_macros!(true);
15439    println!("Hello, Rust!");
15440    trace_macros!(false);
15441}
15442```
15443
15444The `cargo build` output:
15445
15446```txt
15447note: trace_macro
15448 --> src/main.rs:5:5
15449  |
154505 |     println!("Hello, Rust!");
15451  |     ^^^^^^^^^^^^^^^^^^^^^^^^^
15452  |
15453  = note: expanding `println! { "Hello, Rust!" }`
15454  = note: to `print ! ( concat ! ( "Hello, Rust!" , "\n" ) )`
15455  = note: expanding `print! { concat ! ( "Hello, Rust!" , "\n" ) }`
15456  = note: to `$crate :: io :: _print ( format_args ! ( concat ! ( "Hello, Rust!" , "\n" ) )
15457          )`
15458
15459    Finished dev [unoptimized + debuginfo] target(s) in 0.60 secs
15460```
15461"##,
15462        default_severity: Severity::Allow,
15463        warn_since: None,
15464        deny_since: None,
15465    },
15466    Lint {
15467        label: "trait_alias",
15468        description: r##"# `trait_alias`
15469
15470The tracking issue for this feature is: [#41517]
15471
15472[#41517]: https://github.com/rust-lang/rust/issues/41517
15473
15474------------------------
15475
15476The `trait_alias` feature adds support for trait aliases. These allow aliases
15477to be created for one or more traits (currently just a single regular trait plus
15478any number of auto-traits), and used wherever traits would normally be used as
15479either bounds or trait objects.
15480
15481```rust
15482#![feature(trait_alias)]
15483
15484trait Foo = std::fmt::Debug + Send;
15485trait Bar = Foo + Sync;
15486
15487// Use trait alias as bound on type parameter.
15488fn foo<T: Foo>(v: &T) {
15489    println!("{:?}", v);
15490}
15491
15492pub fn main() {
15493    foo(&1);
15494
15495    // Use trait alias for trait objects.
15496    let a: &dyn Bar = &123;
15497    println!("{:?}", a);
15498    let b = Box::new(456) as Box<dyn Foo>;
15499    println!("{:?}", b);
15500}
15501```
15502"##,
15503        default_severity: Severity::Allow,
15504        warn_since: None,
15505        deny_since: None,
15506    },
15507    Lint {
15508        label: "transmutability",
15509        description: r##"# `transmutability`
15510
15511
15512
15513The tracking issue for this feature is: [#99571]
15514
15515[#99571]: https://github.com/rust-lang/rust/issues/99571
15516
15517------------------------
15518"##,
15519        default_severity: Severity::Allow,
15520        warn_since: None,
15521        deny_since: None,
15522    },
15523    Lint {
15524        label: "transmute_generic_consts",
15525        description: r##"# `transmute_generic_consts`
15526
15527Allows for transmuting between arrays with sizes that contain generic consts.
15528
15529The tracking issue for this feature is: [#109929]
15530
15531[#109929]: https://github.com/rust-lang/rust/issues/109929
15532
15533------------------------
15534"##,
15535        default_severity: Severity::Allow,
15536        warn_since: None,
15537        deny_since: None,
15538    },
15539    Lint {
15540        label: "transmute_neo",
15541        description: r##"# `transmute_neo`
15542
15543
15544
15545The tracking issue for this feature is: [#155079]
15546
15547[#155079]: https://github.com/rust-lang/rust/issues/155079
15548
15549------------------------
15550"##,
15551        default_severity: Severity::Allow,
15552        warn_since: None,
15553        deny_since: None,
15554    },
15555    Lint {
15556        label: "transmute_prefix",
15557        description: r##"# `transmute_prefix`
15558
15559
15560
15561The tracking issue for this feature is: [#155079]
15562
15563[#155079]: https://github.com/rust-lang/rust/issues/155079
15564
15565------------------------
15566"##,
15567        default_severity: Severity::Allow,
15568        warn_since: None,
15569        deny_since: None,
15570    },
15571    Lint {
15572        label: "transparent_unions",
15573        description: r##"# `transparent_unions`
15574
15575The tracking issue for this feature is [#60405]
15576
15577[#60405]: https://github.com/rust-lang/rust/issues/60405
15578
15579----
15580
15581The `transparent_unions` feature allows you mark `union`s as
15582`#[repr(transparent)]`. A `union` may be `#[repr(transparent)]` in exactly the
15583same conditions in which a `struct` may be `#[repr(transparent)]` (generally,
15584this means the `union` must have exactly one non-zero-sized field). Some
15585concrete illustrations follow.
15586
15587```rust
15588#![feature(transparent_unions)]
15589
15590// This union has the same representation as `f32`.
15591#[repr(transparent)]
15592union SingleFieldUnion {
15593    field: f32,
15594}
15595
15596// This union has the same representation as `usize`.
15597#[repr(transparent)]
15598union MultiFieldUnion {
15599    field: usize,
15600    nothing: (),
15601}
15602```
15603
15604For consistency with transparent `struct`s, `union`s must have exactly one
15605non-zero-sized field. If all fields are zero-sized, the `union` must not be
15606`#[repr(transparent)]`:
15607
15608```rust
15609#![feature(transparent_unions)]
15610
15611// This (non-transparent) union is already valid in stable Rust:
15612pub union GoodUnion {
15613    pub nothing: (),
15614}
15615
15616// Error: transparent union needs exactly one non-zero-sized field, but has 0
15617// #[repr(transparent)]
15618// pub union BadUnion {
15619//     pub nothing: (),
15620// }
15621```
15622
15623The one exception is if the `union` is generic over `T` and has a field of type
15624`T`, it may be `#[repr(transparent)]` even if `T` is a zero-sized type:
15625
15626```rust
15627#![feature(transparent_unions)]
15628
15629// This union has the same representation as `T`.
15630#[repr(transparent)]
15631pub union GenericUnion<T: Copy> { // Unions with non-`Copy` fields are unstable.
15632    pub field: T,
15633    pub nothing: (),
15634}
15635
15636// This is okay even though `()` is a zero-sized type.
15637pub const THIS_IS_OKAY: GenericUnion<()> = GenericUnion { field: () };
15638```
15639
15640Like transparent `struct`s, a transparent `union` of type `U` has the same
15641layout, size, and ABI as its single non-ZST field. If it is generic over a type
15642`T`, and all its fields are ZSTs except for exactly one field of type `T`, then
15643it has the same layout and ABI as `T` (even if `T` is a ZST when monomorphized).
15644
15645Like transparent `struct`s, transparent `union`s are FFI-safe if and only if
15646their underlying representation type is also FFI-safe.
15647
15648A `union` may not be eligible for the same nonnull-style optimizations that a
15649`struct` or `enum` (with the same fields) are eligible for. Adding
15650`#[repr(transparent)]` to  `union` does not change this. To give a more concrete
15651example, it is unspecified whether `size_of::<T>()` is equal to
15652`size_of::<Option<T>>()`, where `T` is a `union` (regardless of whether or not
15653it is transparent). The Rust compiler is free to perform this optimization if
15654possible, but is not required to, and different compiler versions may differ in
15655their application of these optimizations.
15656"##,
15657        default_severity: Severity::Allow,
15658        warn_since: None,
15659        deny_since: None,
15660    },
15661    Lint {
15662        label: "trim_prefix_suffix",
15663        description: r##"# `trim_prefix_suffix`
15664
15665
15666
15667The tracking issue for this feature is: [#142312]
15668
15669[#142312]: https://github.com/rust-lang/rust/issues/142312
15670
15671------------------------
15672"##,
15673        default_severity: Severity::Allow,
15674        warn_since: None,
15675        deny_since: None,
15676    },
15677    Lint {
15678        label: "trivial_bounds",
15679        description: r##"# `trivial_bounds`
15680
15681Allows inconsistent bounds in where clauses.
15682
15683The tracking issue for this feature is: [#48214]
15684
15685[#48214]: https://github.com/rust-lang/rust/issues/48214
15686
15687------------------------
15688"##,
15689        default_severity: Severity::Allow,
15690        warn_since: None,
15691        deny_since: None,
15692    },
15693    Lint {
15694        label: "trivial_clone",
15695        description: r##"# `trivial_clone`
15696
15697
15698
15699This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
15700
15701------------------------
15702"##,
15703        default_severity: Severity::Allow,
15704        warn_since: None,
15705        deny_since: None,
15706    },
15707    Lint {
15708        label: "trusted_fused",
15709        description: r##"# `trusted_fused`
15710
15711
15712
15713This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
15714
15715------------------------
15716"##,
15717        default_severity: Severity::Allow,
15718        warn_since: None,
15719        deny_since: None,
15720    },
15721    Lint {
15722        label: "trusted_len",
15723        description: r##"# `trusted_len`
15724
15725
15726
15727The tracking issue for this feature is: [#37572]
15728
15729[#37572]: https://github.com/rust-lang/rust/issues/37572
15730
15731------------------------
15732"##,
15733        default_severity: Severity::Allow,
15734        warn_since: None,
15735        deny_since: None,
15736    },
15737    Lint {
15738        label: "trusted_len_next_unchecked",
15739        description: r##"# `trusted_len_next_unchecked`
15740
15741
15742
15743The tracking issue for this feature is: [#37572]
15744
15745[#37572]: https://github.com/rust-lang/rust/issues/37572
15746
15747------------------------
15748"##,
15749        default_severity: Severity::Allow,
15750        warn_since: None,
15751        deny_since: None,
15752    },
15753    Lint {
15754        label: "trusted_random_access",
15755        description: r##"# `trusted_random_access`
15756
15757
15758
15759This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
15760
15761------------------------
15762"##,
15763        default_severity: Severity::Allow,
15764        warn_since: None,
15765        deny_since: None,
15766    },
15767    Lint {
15768        label: "trusted_step",
15769        description: r##"# `trusted_step`
15770
15771
15772
15773The tracking issue for this feature is: [#85731]
15774
15775[#85731]: https://github.com/rust-lang/rust/issues/85731
15776
15777------------------------
15778"##,
15779        default_severity: Severity::Allow,
15780        warn_since: None,
15781        deny_since: None,
15782    },
15783    Lint {
15784        label: "try_as_dyn",
15785        description: r##"# `try_as_dyn`
15786
15787
15788
15789The tracking issue for this feature is: [#144361]
15790
15791[#144361]: https://github.com/rust-lang/rust/issues/144361
15792
15793------------------------
15794"##,
15795        default_severity: Severity::Allow,
15796        warn_since: None,
15797        deny_since: None,
15798    },
15799    Lint {
15800        label: "try_blocks",
15801        description: r##"# `try_blocks`
15802
15803The tracking issue for this feature is: [#154391]
15804
15805[#154391]: https://github.com/rust-lang/rust/issues/154391
15806
15807------------------------
15808
15809The `try_blocks` feature adds support for `try` blocks. A `try`
15810block creates a new scope one can use the `?` operator in.
15811
15812```rust,edition2018
15813#![feature(try_blocks)]
15814
15815use std::num::ParseIntError;
15816
15817let result = try {
15818    "1".parse::<i32>()?
15819        + "2".parse::<i32>()?
15820        + "3".parse::<i32>()?
15821};
15822assert_eq!(result, Ok(6));
15823
15824let result = try {
15825    "1".parse::<i32>()?
15826        + "foo".parse::<i32>()?
15827        + "3".parse::<i32>()?
15828};
15829assert!(result.is_err());
15830```
15831"##,
15832        default_severity: Severity::Allow,
15833        warn_since: None,
15834        deny_since: None,
15835    },
15836    Lint {
15837        label: "try_blocks_heterogeneous",
15838        description: r##"# `try_blocks_heterogeneous`
15839
15840Allows using `try bikeshed TargetType {...}` expressions.
15841
15842The tracking issue for this feature is: [#149488]
15843
15844[#149488]: https://github.com/rust-lang/rust/issues/149488
15845
15846------------------------
15847"##,
15848        default_severity: Severity::Allow,
15849        warn_since: None,
15850        deny_since: None,
15851    },
15852    Lint {
15853        label: "try_find",
15854        description: r##"# `try_find`
15855
15856
15857
15858The tracking issue for this feature is: [#63178]
15859
15860[#63178]: https://github.com/rust-lang/rust/issues/63178
15861
15862------------------------
15863"##,
15864        default_severity: Severity::Allow,
15865        warn_since: None,
15866        deny_since: None,
15867    },
15868    Lint {
15869        label: "try_from_int_error_kind",
15870        description: r##"# `try_from_int_error_kind`
15871
15872
15873
15874The tracking issue for this feature is: [#153978]
15875
15876[#153978]: https://github.com/rust-lang/rust/issues/153978
15877
15878------------------------
15879"##,
15880        default_severity: Severity::Allow,
15881        warn_since: None,
15882        deny_since: None,
15883    },
15884    Lint {
15885        label: "try_reserve_kind",
15886        description: r##"# `try_reserve_kind`
15887
15888
15889
15890The tracking issue for this feature is: [#48043]
15891
15892[#48043]: https://github.com/rust-lang/rust/issues/48043
15893
15894------------------------
15895"##,
15896        default_severity: Severity::Allow,
15897        warn_since: None,
15898        deny_since: None,
15899    },
15900    Lint {
15901        label: "try_trait_v2",
15902        description: r##"# `try_trait_v2`
15903
15904
15905
15906The tracking issue for this feature is: [#84277]
15907
15908[#84277]: https://github.com/rust-lang/rust/issues/84277
15909
15910------------------------
15911"##,
15912        default_severity: Severity::Allow,
15913        warn_since: None,
15914        deny_since: None,
15915    },
15916    Lint {
15917        label: "try_trait_v2_residual",
15918        description: r##"# `try_trait_v2_residual`
15919
15920
15921
15922The tracking issue for this feature is: [#91285]
15923
15924[#91285]: https://github.com/rust-lang/rust/issues/91285
15925
15926------------------------
15927"##,
15928        default_severity: Severity::Allow,
15929        warn_since: None,
15930        deny_since: None,
15931    },
15932    Lint {
15933        label: "try_trait_v2_yeet",
15934        description: r##"# `try_trait_v2_yeet`
15935
15936
15937
15938The tracking issue for this feature is: [#96374]
15939
15940[#96374]: https://github.com/rust-lang/rust/issues/96374
15941
15942------------------------
15943"##,
15944        default_severity: Severity::Allow,
15945        warn_since: None,
15946        deny_since: None,
15947    },
15948    Lint {
15949        label: "try_with_capacity",
15950        description: r##"# `try_with_capacity`
15951
15952
15953
15954The tracking issue for this feature is: [#91913]
15955
15956[#91913]: https://github.com/rust-lang/rust/issues/91913
15957
15958------------------------
15959"##,
15960        default_severity: Severity::Allow,
15961        warn_since: None,
15962        deny_since: None,
15963    },
15964    Lint {
15965        label: "tuple_trait",
15966        description: r##"# `tuple_trait`
15967
15968
15969
15970This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
15971
15972------------------------
15973"##,
15974        default_severity: Severity::Allow,
15975        warn_since: None,
15976        deny_since: None,
15977    },
15978    Lint {
15979        label: "type_alias_impl_trait",
15980        description: r##"# `type_alias_impl_trait`
15981
15982The tracking issue for this feature is: [#63063]
15983
15984------------------------
15985
15986> This feature is not to be confused with [`trait_alias`] or [`impl_trait_in_assoc_type`].
15987
15988### What is `impl Trait`?
15989
15990`impl Trait` in return position is useful for declaring types that are constrained by traits, but whose concrete type should be hidden:
15991
15992```rust
15993use std::fmt::Debug;
15994
15995fn new() -> impl Debug {
15996    42
15997}
15998
15999fn main() {
16000    let thing = new();
16001    // What actually is a `thing`?
16002    // No idea but we know it implements `Debug`, so we can debug print it
16003    println!("{thing:?}");
16004}
16005```
16006
16007See the [reference] for more information about `impl Trait` in return position.
16008
16009### `type_alias_impl_trait`
16010
16011However, we might want to use an `impl Trait` in multiple locations but actually use the same concrete type everywhere while keeping it hidden.
16012This can be useful in libraries where you want to hide implementation details.
16013
16014The `#[define_opaque]` attribute must be used to explicitly list opaque items constrained by the item it's on.
16015
16016```rust
16017#![feature(type_alias_impl_trait)]
16018# #![allow(unused_variables, dead_code)]
16019trait Trait {}
16020
16021struct MyType;
16022
16023impl Trait for MyType {}
16024
16025type Alias = impl Trait;
16026
16027#[define_opaque(Alias)] // To constrain the type alias to `MyType`
16028fn new() -> Alias {
16029    MyType
16030}
16031
16032#[define_opaque(Alias)] // So we can name the concrete type inside this item
16033fn main() {
16034    let thing: MyType = new();
16035}
16036
16037// It can be a part of a struct too
16038struct HaveAlias {
16039    stuff: String,
16040    thing: Alias,
16041}
16042```
16043
16044In this example, the concrete type referred to by `Alias` is guaranteed to be the same wherever `Alias` occurs.
16045
16046> Originally this feature included type aliases as an associated type of a trait. In [#110237] this was split off to [`impl_trait_in_assoc_type`].
16047
16048### `type_alias_impl_trait` in argument position.
16049
16050Note that using `Alias` as an argument type is *not* the same as argument-position `impl Trait`, as `Alias` refers to a unique type, whereas the concrete type for argument-position `impl Trait` is chosen by the caller.
16051
16052```rust
16053# #![feature(type_alias_impl_trait)]
16054# #![allow(unused_variables)]
16055# pub mod x {
16056# pub trait Trait {}
16057#
16058# struct MyType;
16059#
16060# impl Trait for MyType {}
16061#
16062# pub type Alias = impl Trait;
16063#
16064# #[define_opaque(Alias)]
16065# pub fn new() -> Alias {
16066#     MyType
16067# }
16068# }
16069# use x::*;
16070// this...
16071pub fn take_alias(x: Alias) {
16072    // ...
16073}
16074
16075// ...is *not* the same as
16076pub fn take_impl(x: impl Trait) {
16077    // ...
16078}
16079# fn main(){}
16080```
16081
16082```rust,compile_fail,E0308
16083# #![feature(type_alias_impl_trait)]
16084# #![allow(unused_variables)]
16085# pub mod x {
16086# pub trait Trait {}
16087#
16088# struct MyType;
16089#
16090# impl Trait for MyType {}
16091#
16092# pub type Alias = impl Trait;
16093#
16094# #[define_opaque(Alias)]
16095# pub fn new() -> Alias {
16096#     MyType
16097# }
16098# }
16099# use x::*;
16100# pub fn take_alias(x: Alias) {
16101#     // ...
16102# }
16103#
16104# pub fn take_impl(x: impl Trait) {
16105#    // ...
16106# }
16107#
16108// a user's crate using the trait and type alias
16109struct UserType;
16110impl Trait for UserType {}
16111
16112# fn main(){
16113let x = UserType;
16114take_alias(x);
16115// ERROR expected opaque type, found `UserType`
16116// this function *actually* takes a `MyType` as is constrained in `new`
16117
16118let x = UserType;
16119take_impl(x);
16120// OK
16121
16122let x = new();
16123take_alias(x);
16124// OK
16125
16126let x = new();
16127take_impl(x);
16128// OK
16129# }
16130```
16131
16132Note that the user cannot use `#[define_opaque(Alias)]` to reify the opaque type because only the crate where the type alias is declared may do so. But if this happened in the same crate and the opaque type was reified, they'd get a familiar error: "expected `MyType`, got `UserType`".
16133
16134[#63063]: https://github.com/rust-lang/rust/issues/63063
16135[#110237]: https://github.com/rust-lang/rust/pull/110237
16136[reference]: https://doc.rust-lang.org/stable/reference/types/impl-trait.html#abstract-return-types
16137[`trait_alias`]: ./trait-alias.md
16138[`impl_trait_in_assoc_type`]: ./impl-trait-in-assoc-type.md
16139"##,
16140        default_severity: Severity::Allow,
16141        warn_since: None,
16142        deny_since: None,
16143    },
16144    Lint {
16145        label: "type_ascription",
16146        description: r##"# `type_ascription`
16147
16148
16149
16150The tracking issue for this feature is: [#23416]
16151
16152[#23416]: https://github.com/rust-lang/rust/issues/23416
16153
16154------------------------
16155"##,
16156        default_severity: Severity::Allow,
16157        warn_since: None,
16158        deny_since: None,
16159    },
16160    Lint {
16161        label: "type_changing_struct_update",
16162        description: r##"# `type_changing_struct_update`
16163
16164The tracking issue for this feature is: [#86555]
16165
16166[#86555]: https://github.com/rust-lang/rust/issues/86555
16167
16168------------------------
16169
16170This implements [RFC2528]. When turned on, you can create instances of the same struct
16171that have different generic type or lifetime parameters.
16172
16173[RFC2528]: https://github.com/rust-lang/rfcs/blob/master/text/2528-type-changing-struct-update-syntax.md
16174
16175```rust
16176#![allow(unused_variables, dead_code)]
16177#![feature(type_changing_struct_update)]
16178
16179fn main () {
16180    struct Foo<T, U> {
16181        field1: T,
16182        field2: U,
16183    }
16184
16185    let base: Foo<String, i32> = Foo {
16186        field1: String::from("hello"),
16187        field2: 1234,
16188    };
16189    let updated: Foo<f64, i32> = Foo {
16190        field1: 3.14,
16191        ..base
16192    };
16193}
16194```
16195"##,
16196        default_severity: Severity::Allow,
16197        warn_since: None,
16198        deny_since: None,
16199    },
16200    Lint {
16201        label: "type_info",
16202        description: r##"# `type_info`
16203
16204
16205
16206The tracking issue for this feature is: [#146922]
16207
16208[#146922]: https://github.com/rust-lang/rust/issues/146922
16209
16210------------------------
16211"##,
16212        default_severity: Severity::Allow,
16213        warn_since: None,
16214        deny_since: None,
16215    },
16216    Lint {
16217        label: "ub_checks",
16218        description: r##"# `ub_checks`
16219
16220
16221
16222This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
16223
16224------------------------
16225"##,
16226        default_severity: Severity::Allow,
16227        warn_since: None,
16228        deny_since: None,
16229    },
16230    Lint {
16231        label: "uefi_std",
16232        description: r##"# `uefi_std`
16233
16234
16235
16236The tracking issue for this feature is: [#100499]
16237
16238[#100499]: https://github.com/rust-lang/rust/issues/100499
16239
16240------------------------
16241"##,
16242        default_severity: Severity::Allow,
16243        warn_since: None,
16244        deny_since: None,
16245    },
16246    Lint {
16247        label: "uint_carryless_mul",
16248        description: r##"# `uint_carryless_mul`
16249
16250
16251
16252The tracking issue for this feature is: [#152080]
16253
16254[#152080]: https://github.com/rust-lang/rust/issues/152080
16255
16256------------------------
16257"##,
16258        default_severity: Severity::Allow,
16259        warn_since: None,
16260        deny_since: None,
16261    },
16262    Lint {
16263        label: "uint_gather_scatter_bits",
16264        description: r##"# `uint_gather_scatter_bits`
16265
16266
16267
16268The tracking issue for this feature is: [#149069]
16269
16270[#149069]: https://github.com/rust-lang/rust/issues/149069
16271
16272------------------------
16273"##,
16274        default_severity: Severity::Allow,
16275        warn_since: None,
16276        deny_since: None,
16277    },
16278    Lint {
16279        label: "unboxed_closures",
16280        description: r##"# `unboxed_closures`
16281
16282The tracking issue for this feature is [#29625]
16283
16284See Also: [`fn_traits`](../library-features/fn-traits.md)
16285
16286[#29625]: https://github.com/rust-lang/rust/issues/29625
16287
16288----
16289
16290The `unboxed_closures` feature allows you to write functions using the `"rust-call"` ABI,
16291required for implementing the [`Fn*`] family of traits. `"rust-call"` functions must have
16292exactly one (non self) argument, a tuple representing the argument list.
16293
16294[`Fn*`]: ../../std/ops/trait.Fn.html
16295
16296```rust
16297#![feature(unboxed_closures)]
16298
16299extern "rust-call" fn add_args(args: (u32, u32)) -> u32 {
16300    args.0 + args.1
16301}
16302
16303fn main() {}
16304```
16305"##,
16306        default_severity: Severity::Allow,
16307        warn_since: None,
16308        deny_since: None,
16309    },
16310    Lint {
16311        label: "unicode_internals",
16312        description: r##"# `unicode_internals`
16313
16314
16315
16316This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
16317
16318------------------------
16319"##,
16320        default_severity: Severity::Allow,
16321        warn_since: None,
16322        deny_since: None,
16323    },
16324    Lint {
16325        label: "unique_rc_arc",
16326        description: r##"# `unique_rc_arc`
16327
16328
16329
16330The tracking issue for this feature is: [#112566]
16331
16332[#112566]: https://github.com/rust-lang/rust/issues/112566
16333
16334------------------------
16335"##,
16336        default_severity: Severity::Allow,
16337        warn_since: None,
16338        deny_since: None,
16339    },
16340    Lint {
16341        label: "unix_file_vectored_at",
16342        description: r##"# `unix_file_vectored_at`
16343
16344
16345
16346The tracking issue for this feature is: [#89517]
16347
16348[#89517]: https://github.com/rust-lang/rust/issues/89517
16349
16350------------------------
16351"##,
16352        default_severity: Severity::Allow,
16353        warn_since: None,
16354        deny_since: None,
16355    },
16356    Lint {
16357        label: "unix_kill_process_group",
16358        description: r##"# `unix_kill_process_group`
16359
16360
16361
16362The tracking issue for this feature is: [#156537]
16363
16364[#156537]: https://github.com/rust-lang/rust/issues/156537
16365
16366------------------------
16367"##,
16368        default_severity: Severity::Allow,
16369        warn_since: None,
16370        deny_since: None,
16371    },
16372    Lint {
16373        label: "unix_mkfifo",
16374        description: r##"# `unix_mkfifo`
16375
16376
16377
16378The tracking issue for this feature is: [#139324]
16379
16380[#139324]: https://github.com/rust-lang/rust/issues/139324
16381
16382------------------------
16383"##,
16384        default_severity: Severity::Allow,
16385        warn_since: None,
16386        deny_since: None,
16387    },
16388    Lint {
16389        label: "unix_send_signal",
16390        description: r##"# `unix_send_signal`
16391
16392
16393
16394The tracking issue for this feature is: [#141975]
16395
16396[#141975]: https://github.com/rust-lang/rust/issues/141975
16397
16398------------------------
16399"##,
16400        default_severity: Severity::Allow,
16401        warn_since: None,
16402        deny_since: None,
16403    },
16404    Lint {
16405        label: "unix_set_mark",
16406        description: r##"# `unix_set_mark`
16407
16408
16409
16410The tracking issue for this feature is: [#96467]
16411
16412[#96467]: https://github.com/rust-lang/rust/issues/96467
16413
16414------------------------
16415"##,
16416        default_severity: Severity::Allow,
16417        warn_since: None,
16418        deny_since: None,
16419    },
16420    Lint {
16421        label: "unix_socket_ancillary_data",
16422        description: r##"# `unix_socket_ancillary_data`
16423
16424
16425
16426The tracking issue for this feature is: [#76915]
16427
16428[#76915]: https://github.com/rust-lang/rust/issues/76915
16429
16430------------------------
16431"##,
16432        default_severity: Severity::Allow,
16433        warn_since: None,
16434        deny_since: None,
16435    },
16436    Lint {
16437        label: "unix_socket_exclbind",
16438        description: r##"# `unix_socket_exclbind`
16439
16440
16441
16442The tracking issue for this feature is: [#123481]
16443
16444[#123481]: https://github.com/rust-lang/rust/issues/123481
16445
16446------------------------
16447"##,
16448        default_severity: Severity::Allow,
16449        warn_since: None,
16450        deny_since: None,
16451    },
16452    Lint {
16453        label: "unix_socket_peek",
16454        description: r##"# `unix_socket_peek`
16455
16456
16457
16458The tracking issue for this feature is: [#76923]
16459
16460[#76923]: https://github.com/rust-lang/rust/issues/76923
16461
16462------------------------
16463"##,
16464        default_severity: Severity::Allow,
16465        warn_since: None,
16466        deny_since: None,
16467    },
16468    Lint {
16469        label: "unqualified_local_imports",
16470        description: r##"# `unqualified_local_imports`
16471
16472Helps with formatting for `group_imports = "StdExternalCrate"`.
16473
16474The tracking issue for this feature is: [#138299]
16475
16476[#138299]: https://github.com/rust-lang/rust/issues/138299
16477
16478------------------------
16479"##,
16480        default_severity: Severity::Allow,
16481        warn_since: None,
16482        deny_since: None,
16483    },
16484    Lint {
16485        label: "unsafe_binders",
16486        description: r##"# `unsafe_binders`
16487
16488Allows using `unsafe<'a> &'a T` unsafe binder types.
16489
16490The tracking issue for this feature is: [#130516]
16491
16492[#130516]: https://github.com/rust-lang/rust/issues/130516
16493
16494------------------------
16495"##,
16496        default_severity: Severity::Allow,
16497        warn_since: None,
16498        deny_since: None,
16499    },
16500    Lint {
16501        label: "unsafe_cell_access",
16502        description: r##"# `unsafe_cell_access`
16503
16504
16505
16506The tracking issue for this feature is: [#136327]
16507
16508[#136327]: https://github.com/rust-lang/rust/issues/136327
16509
16510------------------------
16511"##,
16512        default_severity: Severity::Allow,
16513        warn_since: None,
16514        deny_since: None,
16515    },
16516    Lint {
16517        label: "unsafe_fields",
16518        description: r##"# `unsafe_fields`
16519
16520Allows declaring fields `unsafe`.
16521
16522The tracking issue for this feature is: [#132922]
16523
16524[#132922]: https://github.com/rust-lang/rust/issues/132922
16525
16526------------------------
16527"##,
16528        default_severity: Severity::Allow,
16529        warn_since: None,
16530        deny_since: None,
16531    },
16532    Lint {
16533        label: "unsafe_pinned",
16534        description: r##"# `unsafe_pinned`
16535
16536
16537
16538The tracking issue for this feature is: [#125735]
16539
16540[#125735]: https://github.com/rust-lang/rust/issues/125735
16541
16542------------------------
16543"##,
16544        default_severity: Severity::Allow,
16545        warn_since: None,
16546        deny_since: None,
16547    },
16548    Lint {
16549        label: "unsafe_unpin",
16550        description: r##"# `unsafe_unpin`
16551
16552
16553
16554The tracking issue for this feature is: [#125735]
16555
16556[#125735]: https://github.com/rust-lang/rust/issues/125735
16557
16558------------------------
16559"##,
16560        default_severity: Severity::Allow,
16561        warn_since: None,
16562        deny_since: None,
16563    },
16564    Lint {
16565        label: "unsize",
16566        description: r##"# `unsize`
16567
16568
16569
16570The tracking issue for this feature is: [#18598]
16571
16572[#18598]: https://github.com/rust-lang/rust/issues/18598
16573
16574------------------------
16575"##,
16576        default_severity: Severity::Allow,
16577        warn_since: None,
16578        deny_since: None,
16579    },
16580    Lint {
16581        label: "unsized_const_params",
16582        description: r##"# `unsized_const_params`
16583
16584Allows const generic parameters to be defined with types that are not `Sized`, e.g. `fn foo<const N: [u8]>() {`.
16585
16586The tracking issue for this feature is: [#95174]
16587
16588[#95174]: https://github.com/rust-lang/rust/issues/95174
16589
16590------------------------
16591"##,
16592        default_severity: Severity::Allow,
16593        warn_since: None,
16594        deny_since: None,
16595    },
16596    Lint {
16597        label: "unsized_fn_params",
16598        description: r##"# `unsized_fn_params`
16599
16600Allows unsized fn parameters.
16601
16602The tracking issue for this feature is: [#48055]
16603
16604[#48055]: https://github.com/rust-lang/rust/issues/48055
16605
16606------------------------
16607"##,
16608        default_severity: Severity::Allow,
16609        warn_since: None,
16610        deny_since: None,
16611    },
16612    Lint {
16613        label: "unwrap_infallible",
16614        description: r##"# `unwrap_infallible`
16615
16616
16617
16618The tracking issue for this feature is: [#61695]
16619
16620[#61695]: https://github.com/rust-lang/rust/issues/61695
16621
16622------------------------
16623"##,
16624        default_severity: Severity::Allow,
16625        warn_since: None,
16626        deny_since: None,
16627    },
16628    Lint {
16629        label: "update_panic_count",
16630        description: r##"# `update_panic_count`
16631
16632This feature is internal to the Rust compiler and is not intended for general use.
16633
16634------------------------
16635"##,
16636        default_severity: Severity::Allow,
16637        warn_since: None,
16638        deny_since: None,
16639    },
16640    Lint {
16641        label: "used_with_arg",
16642        description: r##"# `used_with_arg`
16643
16644Allows using the `#[used(linker)]` (or `#[used(compiler)]`) attribute.
16645
16646The tracking issue for this feature is: [#93798]
16647
16648[#93798]: https://github.com/rust-lang/rust/issues/93798
16649
16650------------------------
16651"##,
16652        default_severity: Severity::Allow,
16653        warn_since: None,
16654        deny_since: None,
16655    },
16656    Lint {
16657        label: "utf16_extra",
16658        description: r##"# `utf16_extra`
16659
16660
16661
16662The tracking issue for this feature is: [#94919]
16663
16664[#94919]: https://github.com/rust-lang/rust/issues/94919
16665
16666------------------------
16667"##,
16668        default_severity: Severity::Allow,
16669        warn_since: None,
16670        deny_since: None,
16671    },
16672    Lint {
16673        label: "variant_count",
16674        description: r##"# `variant_count`
16675
16676
16677
16678The tracking issue for this feature is: [#73662]
16679
16680[#73662]: https://github.com/rust-lang/rust/issues/73662
16681
16682------------------------
16683"##,
16684        default_severity: Severity::Allow,
16685        warn_since: None,
16686        deny_since: None,
16687    },
16688    Lint {
16689        label: "vec_deque_extract_if",
16690        description: r##"# `vec_deque_extract_if`
16691
16692
16693
16694The tracking issue for this feature is: [#147750]
16695
16696[#147750]: https://github.com/rust-lang/rust/issues/147750
16697
16698------------------------
16699"##,
16700        default_severity: Severity::Allow,
16701        warn_since: None,
16702        deny_since: None,
16703    },
16704    Lint {
16705        label: "vec_deque_iter_as_slices",
16706        description: r##"# `vec_deque_iter_as_slices`
16707
16708
16709
16710The tracking issue for this feature is: [#123947]
16711
16712[#123947]: https://github.com/rust-lang/rust/issues/123947
16713
16714------------------------
16715"##,
16716        default_severity: Severity::Allow,
16717        warn_since: None,
16718        deny_since: None,
16719    },
16720    Lint {
16721        label: "vec_deque_truncate_front",
16722        description: r##"# `vec_deque_truncate_front`
16723
16724
16725
16726The tracking issue for this feature is: [#140667]
16727
16728[#140667]: https://github.com/rust-lang/rust/issues/140667
16729
16730------------------------
16731"##,
16732        default_severity: Severity::Allow,
16733        warn_since: None,
16734        deny_since: None,
16735    },
16736    Lint {
16737        label: "vec_fallible_shrink",
16738        description: r##"# `vec_fallible_shrink`
16739
16740
16741
16742The tracking issue for this feature is: [#152350]
16743
16744[#152350]: https://github.com/rust-lang/rust/issues/152350
16745
16746------------------------
16747"##,
16748        default_severity: Severity::Allow,
16749        warn_since: None,
16750        deny_since: None,
16751    },
16752    Lint {
16753        label: "vec_from_fn",
16754        description: r##"# `vec_from_fn`
16755
16756
16757
16758The tracking issue for this feature is: [#149698]
16759
16760[#149698]: https://github.com/rust-lang/rust/issues/149698
16761
16762------------------------
16763"##,
16764        default_severity: Severity::Allow,
16765        warn_since: None,
16766        deny_since: None,
16767    },
16768    Lint {
16769        label: "vec_into_chunks",
16770        description: r##"# `vec_into_chunks`
16771
16772
16773
16774The tracking issue for this feature is: [#142137]
16775
16776[#142137]: https://github.com/rust-lang/rust/issues/142137
16777
16778------------------------
16779"##,
16780        default_severity: Severity::Allow,
16781        warn_since: None,
16782        deny_since: None,
16783    },
16784    Lint {
16785        label: "vec_peek_mut",
16786        description: r##"# `vec_peek_mut`
16787
16788
16789
16790The tracking issue for this feature is: [#122742]
16791
16792[#122742]: https://github.com/rust-lang/rust/issues/122742
16793
16794------------------------
16795"##,
16796        default_severity: Severity::Allow,
16797        warn_since: None,
16798        deny_since: None,
16799    },
16800    Lint {
16801        label: "vec_push_within_capacity",
16802        description: r##"# `vec_push_within_capacity`
16803
16804
16805
16806The tracking issue for this feature is: [#100486]
16807
16808[#100486]: https://github.com/rust-lang/rust/issues/100486
16809
16810------------------------
16811"##,
16812        default_severity: Severity::Allow,
16813        warn_since: None,
16814        deny_since: None,
16815    },
16816    Lint {
16817        label: "vec_recycle",
16818        description: r##"# `vec_recycle`
16819
16820
16821
16822The tracking issue for this feature is: [#148227]
16823
16824[#148227]: https://github.com/rust-lang/rust/issues/148227
16825
16826------------------------
16827"##,
16828        default_severity: Severity::Allow,
16829        warn_since: None,
16830        deny_since: None,
16831    },
16832    Lint {
16833        label: "vec_split_at_spare",
16834        description: r##"# `vec_split_at_spare`
16835
16836
16837
16838The tracking issue for this feature is: [#81944]
16839
16840[#81944]: https://github.com/rust-lang/rust/issues/81944
16841
16842------------------------
16843"##,
16844        default_severity: Severity::Allow,
16845        warn_since: None,
16846        deny_since: None,
16847    },
16848    Lint {
16849        label: "vec_try_remove",
16850        description: r##"# `vec_try_remove`
16851
16852
16853
16854The tracking issue for this feature is: [#146954]
16855
16856[#146954]: https://github.com/rust-lang/rust/issues/146954
16857
16858------------------------
16859"##,
16860        default_severity: Severity::Allow,
16861        warn_since: None,
16862        deny_since: None,
16863    },
16864    Lint {
16865        label: "view_types",
16866        description: r##"# `view_types`
16867
16868Allows view types.
16869
16870The tracking issue for this feature is: [#155938]
16871
16872[#155938]: https://github.com/rust-lang/rust/issues/155938
16873
16874------------------------
16875"##,
16876        default_severity: Severity::Allow,
16877        warn_since: None,
16878        deny_since: None,
16879    },
16880    Lint {
16881        label: "waker_fn",
16882        description: r##"# `waker_fn`
16883
16884
16885
16886The tracking issue for this feature is: [#149580]
16887
16888[#149580]: https://github.com/rust-lang/rust/issues/149580
16889
16890------------------------
16891"##,
16892        default_severity: Severity::Allow,
16893        warn_since: None,
16894        deny_since: None,
16895    },
16896    Lint {
16897        label: "waker_from_fn_ptr",
16898        description: r##"# `waker_from_fn_ptr`
16899
16900
16901
16902The tracking issue for this feature is: [#148457]
16903
16904[#148457]: https://github.com/rust-lang/rust/issues/148457
16905
16906------------------------
16907"##,
16908        default_severity: Severity::Allow,
16909        warn_since: None,
16910        deny_since: None,
16911    },
16912    Lint {
16913        label: "wasi_ext",
16914        description: r##"# `wasi_ext`
16915
16916
16917
16918The tracking issue for this feature is: [#71213]
16919
16920[#71213]: https://github.com/rust-lang/rust/issues/71213
16921
16922------------------------
16923"##,
16924        default_severity: Severity::Allow,
16925        warn_since: None,
16926        deny_since: None,
16927    },
16928    Lint {
16929        label: "wasm_target_feature",
16930        description: r##"# `wasm_target_feature`
16931
16932Target features on wasm.
16933
16934The tracking issue for this feature is: [#150260]
16935
16936[#150260]: https://github.com/rust-lang/rust/issues/150260
16937
16938------------------------
16939"##,
16940        default_severity: Severity::Allow,
16941        warn_since: None,
16942        deny_since: None,
16943    },
16944    Lint {
16945        label: "where_clause_attrs",
16946        description: r##"# `where_clause_attrs`
16947
16948Allows use of attributes in `where` clauses.
16949
16950The tracking issue for this feature is: [#115590]
16951
16952[#115590]: https://github.com/rust-lang/rust/issues/115590
16953
16954------------------------
16955"##,
16956        default_severity: Severity::Allow,
16957        warn_since: None,
16958        deny_since: None,
16959    },
16960    Lint {
16961        label: "widening_mul",
16962        description: r##"# `widening_mul`
16963
16964
16965
16966The tracking issue for this feature is: [#152016]
16967
16968[#152016]: https://github.com/rust-lang/rust/issues/152016
16969
16970------------------------
16971"##,
16972        default_severity: Severity::Allow,
16973        warn_since: None,
16974        deny_since: None,
16975    },
16976    Lint {
16977        label: "windows_by_handle",
16978        description: r##"# `windows_by_handle`
16979
16980
16981
16982The tracking issue for this feature is: [#63010]
16983
16984[#63010]: https://github.com/rust-lang/rust/issues/63010
16985
16986------------------------
16987"##,
16988        default_severity: Severity::Allow,
16989        warn_since: None,
16990        deny_since: None,
16991    },
16992    Lint {
16993        label: "windows_c",
16994        description: r##"# `windows_c`
16995
16996This feature is internal to the Rust compiler and is not intended for general use.
16997
16998------------------------
16999"##,
17000        default_severity: Severity::Allow,
17001        warn_since: None,
17002        deny_since: None,
17003    },
17004    Lint {
17005        label: "windows_change_time",
17006        description: r##"# `windows_change_time`
17007
17008
17009
17010The tracking issue for this feature is: [#121478]
17011
17012[#121478]: https://github.com/rust-lang/rust/issues/121478
17013
17014------------------------
17015"##,
17016        default_severity: Severity::Allow,
17017        warn_since: None,
17018        deny_since: None,
17019    },
17020    Lint {
17021        label: "windows_freeze_file_times",
17022        description: r##"# `windows_freeze_file_times`
17023
17024
17025
17026The tracking issue for this feature is: [#149715]
17027
17028[#149715]: https://github.com/rust-lang/rust/issues/149715
17029
17030------------------------
17031"##,
17032        default_severity: Severity::Allow,
17033        warn_since: None,
17034        deny_since: None,
17035    },
17036    Lint {
17037        label: "windows_handle",
17038        description: r##"# `windows_handle`
17039
17040This feature is internal to the Rust compiler and is not intended for general use.
17041
17042------------------------
17043"##,
17044        default_severity: Severity::Allow,
17045        warn_since: None,
17046        deny_since: None,
17047    },
17048    Lint {
17049        label: "windows_net",
17050        description: r##"# `windows_net`
17051
17052This feature is internal to the Rust compiler and is not intended for general use.
17053
17054------------------------
17055"##,
17056        default_severity: Severity::Allow,
17057        warn_since: None,
17058        deny_since: None,
17059    },
17060    Lint {
17061        label: "windows_permissions_ext",
17062        description: r##"# `windows_permissions_ext`
17063
17064
17065
17066The tracking issue for this feature is: [#152956]
17067
17068[#152956]: https://github.com/rust-lang/rust/issues/152956
17069
17070------------------------
17071"##,
17072        default_severity: Severity::Allow,
17073        warn_since: None,
17074        deny_since: None,
17075    },
17076    Lint {
17077        label: "windows_process_exit_code_from",
17078        description: r##"# `windows_process_exit_code_from`
17079
17080
17081
17082The tracking issue for this feature is: [#111688]
17083
17084[#111688]: https://github.com/rust-lang/rust/issues/111688
17085
17086------------------------
17087"##,
17088        default_severity: Severity::Allow,
17089        warn_since: None,
17090        deny_since: None,
17091    },
17092    Lint {
17093        label: "windows_process_extensions_async_pipes",
17094        description: r##"# `windows_process_extensions_async_pipes`
17095
17096
17097
17098The tracking issue for this feature is: [#98289]
17099
17100[#98289]: https://github.com/rust-lang/rust/issues/98289
17101
17102------------------------
17103"##,
17104        default_severity: Severity::Allow,
17105        warn_since: None,
17106        deny_since: None,
17107    },
17108    Lint {
17109        label: "windows_process_extensions_force_quotes",
17110        description: r##"# `windows_process_extensions_force_quotes`
17111
17112
17113
17114The tracking issue for this feature is: [#82227]
17115
17116[#82227]: https://github.com/rust-lang/rust/issues/82227
17117
17118------------------------
17119"##,
17120        default_severity: Severity::Allow,
17121        warn_since: None,
17122        deny_since: None,
17123    },
17124    Lint {
17125        label: "windows_process_extensions_inherit_handles",
17126        description: r##"# `windows_process_extensions_inherit_handles`
17127
17128
17129
17130The tracking issue for this feature is: [#146407]
17131
17132[#146407]: https://github.com/rust-lang/rust/issues/146407
17133
17134------------------------
17135"##,
17136        default_severity: Severity::Allow,
17137        warn_since: None,
17138        deny_since: None,
17139    },
17140    Lint {
17141        label: "windows_process_extensions_main_thread_handle",
17142        description: r##"# `windows_process_extensions_main_thread_handle`
17143
17144
17145
17146The tracking issue for this feature is: [#96723]
17147
17148[#96723]: https://github.com/rust-lang/rust/issues/96723
17149
17150------------------------
17151"##,
17152        default_severity: Severity::Allow,
17153        warn_since: None,
17154        deny_since: None,
17155    },
17156    Lint {
17157        label: "windows_process_extensions_raw_attribute",
17158        description: r##"# `windows_process_extensions_raw_attribute`
17159
17160
17161
17162The tracking issue for this feature is: [#114854]
17163
17164[#114854]: https://github.com/rust-lang/rust/issues/114854
17165
17166------------------------
17167"##,
17168        default_severity: Severity::Allow,
17169        warn_since: None,
17170        deny_since: None,
17171    },
17172    Lint {
17173        label: "windows_process_extensions_show_window",
17174        description: r##"# `windows_process_extensions_show_window`
17175
17176
17177
17178The tracking issue for this feature is: [#127544]
17179
17180[#127544]: https://github.com/rust-lang/rust/issues/127544
17181
17182------------------------
17183"##,
17184        default_severity: Severity::Allow,
17185        warn_since: None,
17186        deny_since: None,
17187    },
17188    Lint {
17189        label: "windows_process_extensions_startupinfo",
17190        description: r##"# `windows_process_extensions_startupinfo`
17191
17192
17193
17194The tracking issue for this feature is: [#141010]
17195
17196[#141010]: https://github.com/rust-lang/rust/issues/141010
17197
17198------------------------
17199"##,
17200        default_severity: Severity::Allow,
17201        warn_since: None,
17202        deny_since: None,
17203    },
17204    Lint {
17205        label: "windows_stdio",
17206        description: r##"# `windows_stdio`
17207
17208This feature is internal to the Rust compiler and is not intended for general use.
17209
17210------------------------
17211"##,
17212        default_severity: Severity::Allow,
17213        warn_since: None,
17214        deny_since: None,
17215    },
17216    Lint {
17217        label: "windows_unix_domain_sockets",
17218        description: r##"# `windows_unix_domain_sockets`
17219
17220
17221
17222The tracking issue for this feature is: [#150487]
17223
17224[#150487]: https://github.com/rust-lang/rust/issues/150487
17225
17226------------------------
17227"##,
17228        default_severity: Severity::Allow,
17229        warn_since: None,
17230        deny_since: None,
17231    },
17232    Lint {
17233        label: "with_negative_coherence",
17234        description: r##"# `with_negative_coherence`
17235
17236Use for stable + negative coherence and strict coherence depending on trait's rustc_strict_coherence value.
17237
17238This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
17239
17240------------------------
17241"##,
17242        default_severity: Severity::Allow,
17243        warn_since: None,
17244        deny_since: None,
17245    },
17246    Lint {
17247        label: "wrapping_int_impl",
17248        description: r##"# `wrapping_int_impl`
17249
17250
17251
17252The tracking issue for this feature is: [#32463]
17253
17254[#32463]: https://github.com/rust-lang/rust/issues/32463
17255
17256------------------------
17257"##,
17258        default_severity: Severity::Allow,
17259        warn_since: None,
17260        deny_since: None,
17261    },
17262    Lint {
17263        label: "wrapping_next_power_of_two",
17264        description: r##"# `wrapping_next_power_of_two`
17265
17266
17267
17268The tracking issue for this feature is: [#32463]
17269
17270[#32463]: https://github.com/rust-lang/rust/issues/32463
17271
17272------------------------
17273"##,
17274        default_severity: Severity::Allow,
17275        warn_since: None,
17276        deny_since: None,
17277    },
17278    Lint {
17279        label: "write_all_vectored",
17280        description: r##"# `write_all_vectored`
17281
17282
17283
17284The tracking issue for this feature is: [#70436]
17285
17286[#70436]: https://github.com/rust-lang/rust/issues/70436
17287
17288------------------------
17289"##,
17290        default_severity: Severity::Allow,
17291        warn_since: None,
17292        deny_since: None,
17293    },
17294    Lint {
17295        label: "wtf8_internals",
17296        description: r##"# `wtf8_internals`
17297
17298
17299
17300This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
17301
17302------------------------
17303"##,
17304        default_severity: Severity::Allow,
17305        warn_since: None,
17306        deny_since: None,
17307    },
17308    Lint {
17309        label: "x86_amx_intrinsics",
17310        description: r##"# `x86_amx_intrinsics`
17311
17312Allows use of x86 `AMX` target-feature attributes and intrinsics
17313
17314The tracking issue for this feature is: [#126622]
17315
17316[#126622]: https://github.com/rust-lang/rust/issues/126622
17317
17318------------------------
17319"##,
17320        default_severity: Severity::Allow,
17321        warn_since: None,
17322        deny_since: None,
17323    },
17324    Lint {
17325        label: "x87_target_feature",
17326        description: r##"# `x87_target_feature`
17327
17328The x87 target feature on x86.
17329
17330The tracking issue for this feature is: [#150261]
17331
17332[#150261]: https://github.com/rust-lang/rust/issues/150261
17333
17334------------------------
17335"##,
17336        default_severity: Severity::Allow,
17337        warn_since: None,
17338        deny_since: None,
17339    },
17340    Lint {
17341        label: "xop_target_feature",
17342        description: r##"# `xop_target_feature`
17343
17344Allows use of the `xop` target-feature
17345
17346The tracking issue for this feature is: [#127208]
17347
17348[#127208]: https://github.com/rust-lang/rust/issues/127208
17349
17350------------------------
17351"##,
17352        default_severity: Severity::Allow,
17353        warn_since: None,
17354        deny_since: None,
17355    },
17356    Lint {
17357        label: "yeet_desugar_details",
17358        description: r##"# `yeet_desugar_details`
17359
17360
17361
17362This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
17363
17364------------------------
17365"##,
17366        default_severity: Severity::Allow,
17367        warn_since: None,
17368        deny_since: None,
17369    },
17370    Lint {
17371        label: "yeet_expr",
17372        description: r##"# `yeet_expr`
17373
17374The tracking issue for this feature is: [#96373]
17375
17376[#96373]: https://github.com/rust-lang/rust/issues/96373
17377
17378------------------------
17379
17380The `yeet_expr` feature adds support for `do yeet` expressions,
17381which can be used to early-exit from a function or `try` block.
17382
17383These are highly experimental, thus the placeholder syntax.
17384
17385```rust,edition2021
17386#![feature(yeet_expr)]
17387
17388fn foo() -> Result<String, i32> {
17389    do yeet 4;
17390}
17391assert_eq!(foo(), Err(4));
17392
17393fn bar() -> Option<String> {
17394    do yeet;
17395}
17396assert_eq!(bar(), None);
17397```
17398"##,
17399        default_severity: Severity::Allow,
17400        warn_since: None,
17401        deny_since: None,
17402    },
17403    Lint {
17404        label: "yield_expr",
17405        description: r##"# `yield_expr`
17406
17407
17408
17409The tracking issue for this feature is: [#43122]
17410
17411[#43122]: https://github.com/rust-lang/rust/issues/43122
17412
17413------------------------
17414"##,
17415        default_severity: Severity::Allow,
17416        warn_since: None,
17417        deny_since: None,
17418    },
17419];
17420
17421pub const CLIPPY_LINTS: &[Lint] = &[
17422    Lint {
17423        label: "clippy::absolute_paths",
17424        description: r##"Checks for usage of items through absolute paths, like `std::env::current_dir`."##,
17425        default_severity: Severity::Allow,
17426        warn_since: None,
17427        deny_since: None,
17428    },
17429    Lint {
17430        label: "clippy::absurd_extreme_comparisons",
17431        description: r##"Checks for comparisons where one side of the relation is
17432either the minimum or maximum value for its type and warns if it involves a
17433case that is always true or always false. Only integer and boolean types are
17434checked."##,
17435        default_severity: Severity::Allow,
17436        warn_since: None,
17437        deny_since: None,
17438    },
17439    Lint {
17440        label: "clippy::alloc_instead_of_core",
17441        description: r##"Finds items imported through `alloc` when available through `core`."##,
17442        default_severity: Severity::Allow,
17443        warn_since: None,
17444        deny_since: None,
17445    },
17446    Lint {
17447        label: "clippy::allow_attributes",
17448        description: r##"Checks for usage of the `#[allow]` attribute and suggests replacing it with
17449the `#[expect]` (See [RFC 2383](https://rust-lang.github.io/rfcs/2383-lint-reasons.html))
17450
17451This lint only warns outer attributes (`#[allow]`), as inner attributes
17452(`#![allow]`) are usually used to enable or disable lints on a global scale."##,
17453        default_severity: Severity::Allow,
17454        warn_since: None,
17455        deny_since: None,
17456    },
17457    Lint {
17458        label: "clippy::allow_attributes_without_reason",
17459        description: r##"Checks for attributes that allow lints without a reason."##,
17460        default_severity: Severity::Allow,
17461        warn_since: None,
17462        deny_since: None,
17463    },
17464    Lint {
17465        label: "clippy::almost_complete_range",
17466        description: r##"Checks for ranges which almost include the entire range of letters from 'a' to 'z'
17467or digits from '0' to '9', but don't because they're a half open range."##,
17468        default_severity: Severity::Allow,
17469        warn_since: None,
17470        deny_since: None,
17471    },
17472    Lint {
17473        label: "clippy::almost_swapped",
17474        description: r##"Checks for `foo = bar; bar = foo` sequences."##,
17475        default_severity: Severity::Allow,
17476        warn_since: None,
17477        deny_since: None,
17478    },
17479    Lint {
17480        label: "clippy::approx_constant",
17481        description: r##"Checks for floating point literals that approximate
17482constants which are defined in
17483[`std::f32::consts`](https://doc.rust-lang.org/stable/std/f32/consts/#constants)
17484or
17485[`std::f64::consts`](https://doc.rust-lang.org/stable/std/f64/consts/#constants),
17486respectively, suggesting to use the predefined constant."##,
17487        default_severity: Severity::Allow,
17488        warn_since: None,
17489        deny_since: None,
17490    },
17491    Lint {
17492        label: "clippy::arc_with_non_send_sync",
17493        description: r##".
17494This lint warns when you use `Arc` with a type that does not implement `Send` or `Sync`."##,
17495        default_severity: Severity::Allow,
17496        warn_since: None,
17497        deny_since: None,
17498    },
17499    Lint {
17500        label: "clippy::arithmetic_side_effects",
17501        description: r##"Checks any kind of arithmetic operation of any type.
17502
17503Operators like `+`, `-`, `*` or `<<` are usually capable of overflowing according to the [Rust
17504Reference](https://doc.rust-lang.org/reference/expressions/operator-expr.html#overflow),
17505or can panic (`/`, `%`).
17506
17507Known safe built-in types like `Wrapping` or `Saturating`, floats, operations in constant
17508environments, allowed types and non-constant operations that won't overflow are ignored."##,
17509        default_severity: Severity::Allow,
17510        warn_since: None,
17511        deny_since: None,
17512    },
17513    Lint {
17514        label: "clippy::as_conversions",
17515        description: r##"Checks for usage of `as` conversions.
17516
17517Note that this lint is specialized in linting *every single* use of `as`
17518regardless of whether good alternatives exist or not.
17519If you want more precise lints for `as`, please consider using these separate lints:
17520`unnecessary_cast`, `cast_lossless/cast_possible_truncation/cast_possible_wrap/cast_precision_loss/cast_sign_loss`,
17521`fn_to_numeric_cast(_with_truncation)`, `char_lit_as_u8`, `ref_to_mut` and `ptr_as_ptr`.
17522There is a good explanation the reason why this lint should work in this way and how it is useful
17523[in this issue](https://github.com/rust-lang/rust-clippy/issues/5122)."##,
17524        default_severity: Severity::Allow,
17525        warn_since: None,
17526        deny_since: None,
17527    },
17528    Lint {
17529        label: "clippy::as_ptr_cast_mut",
17530        description: r##"Checks for the result of a `&self`-taking `as_ptr` being cast to a mutable pointer."##,
17531        default_severity: Severity::Allow,
17532        warn_since: None,
17533        deny_since: None,
17534    },
17535    Lint {
17536        label: "clippy::as_underscore",
17537        description: r##"Checks for the usage of `as _` conversion using inferred type."##,
17538        default_severity: Severity::Allow,
17539        warn_since: None,
17540        deny_since: None,
17541    },
17542    Lint {
17543        label: "clippy::assertions_on_constants",
17544        description: r##"Checks for `assert!(true)` and `assert!(false)` calls."##,
17545        default_severity: Severity::Allow,
17546        warn_since: None,
17547        deny_since: None,
17548    },
17549    Lint {
17550        label: "clippy::assertions_on_result_states",
17551        description: r##"Checks for `assert!(r.is_ok())` or `assert!(r.is_err())` calls."##,
17552        default_severity: Severity::Allow,
17553        warn_since: None,
17554        deny_since: None,
17555    },
17556    Lint {
17557        label: "clippy::assign_op_pattern",
17558        description: r##"Checks for `a = a op b` or `a = b commutative_op a`
17559patterns."##,
17560        default_severity: Severity::Allow,
17561        warn_since: None,
17562        deny_since: None,
17563    },
17564    Lint {
17565        label: "clippy::assign_ops",
17566        description: r##"Nothing. This lint has been deprecated"##,
17567        default_severity: Severity::Allow,
17568        warn_since: None,
17569        deny_since: None,
17570    },
17571    Lint {
17572        label: "clippy::assigning_clones",
17573        description: r##"Checks for code like `foo = bar.clone();`"##,
17574        default_severity: Severity::Allow,
17575        warn_since: None,
17576        deny_since: None,
17577    },
17578    Lint {
17579        label: "clippy::async_yields_async",
17580        description: r##"Checks for async blocks that yield values of types
17581that can themselves be awaited."##,
17582        default_severity: Severity::Allow,
17583        warn_since: None,
17584        deny_since: None,
17585    },
17586    Lint {
17587        label: "clippy::await_holding_invalid_type",
17588        description: r##"Allows users to configure types which should not be held across await
17589suspension points."##,
17590        default_severity: Severity::Allow,
17591        warn_since: None,
17592        deny_since: None,
17593    },
17594    Lint {
17595        label: "clippy::await_holding_lock",
17596        description: r##"Checks for calls to `await` while holding a non-async-aware
17597`MutexGuard`."##,
17598        default_severity: Severity::Allow,
17599        warn_since: None,
17600        deny_since: None,
17601    },
17602    Lint {
17603        label: "clippy::await_holding_refcell_ref",
17604        description: r##"Checks for calls to `await` while holding a `RefCell`, `Ref`, or `RefMut`."##,
17605        default_severity: Severity::Allow,
17606        warn_since: None,
17607        deny_since: None,
17608    },
17609    Lint {
17610        label: "clippy::bad_bit_mask",
17611        description: r##"Checks for incompatible bit masks in comparisons.
17612
17613The formula for detecting if an expression of the type `_ <bit_op> m
17614<cmp_op> c` (where `<bit_op>` is one of {`&`, `|`} and `<cmp_op>` is one of
17615{`!=`, `>=`, `>`, `!=`, `>=`, `>`}) can be determined from the following
17616table:
17617
17618|Comparison  |Bit Op|Example      |is always|Formula               |
17619|------------|------|-------------|---------|----------------------|
17620|`==` or `!=`| `&`  |`x & 2 == 3` |`false`  |`c & m != c`          |
17621|`<`  or `>=`| `&`  |`x & 2 < 3`  |`true`   |`m < c`               |
17622|`>`  or `<=`| `&`  |`x & 1 > 1`  |`false`  |`m <= c`              |
17623|`==` or `!=`| `\\|` |`x \\| 1 == 0`|`false`  |`c \\| m != c`         |
17624|`<`  or `>=`| `\\|` |`x \\| 1 < 1` |`false`  |`m >= c`              |
17625|`<=` or `>` | `\\|` |`x \\| 1 > 0` |`true`   |`m > c`               |"##,
17626        default_severity: Severity::Allow,
17627        warn_since: None,
17628        deny_since: None,
17629    },
17630    Lint {
17631        label: "clippy::big_endian_bytes",
17632        description: r##"Checks for the usage of the `to_be_bytes` method and/or the function `from_be_bytes`."##,
17633        default_severity: Severity::Allow,
17634        warn_since: None,
17635        deny_since: None,
17636    },
17637    Lint {
17638        label: "clippy::bind_instead_of_map",
17639        description: r##"Checks for usage of `_.and_then(|x| Some(y))`, `_.and_then(|x| Ok(y))`
17640or `_.or_else(|x| Err(y))`."##,
17641        default_severity: Severity::Allow,
17642        warn_since: None,
17643        deny_since: None,
17644    },
17645    Lint {
17646        label: "clippy::blanket_clippy_restriction_lints",
17647        description: r##"Checks for `warn`/`deny`/`forbid` attributes targeting the whole clippy::restriction category."##,
17648        default_severity: Severity::Allow,
17649        warn_since: None,
17650        deny_since: None,
17651    },
17652    Lint {
17653        label: "clippy::blocks_in_conditions",
17654        description: r##"Checks for `if` and `match` conditions that use blocks containing an
17655expression, statements or conditions that use closures with blocks."##,
17656        default_severity: Severity::Allow,
17657        warn_since: None,
17658        deny_since: None,
17659    },
17660    Lint {
17661        label: "clippy::bool_assert_comparison",
17662        description: r##"This lint warns about boolean comparisons in assert-like macros."##,
17663        default_severity: Severity::Allow,
17664        warn_since: None,
17665        deny_since: None,
17666    },
17667    Lint {
17668        label: "clippy::bool_comparison",
17669        description: r##"Checks for expressions of the form `x == true`,
17670`x != true` and order comparisons such as `x < true` (or vice versa) and
17671suggest using the variable directly."##,
17672        default_severity: Severity::Allow,
17673        warn_since: None,
17674        deny_since: None,
17675    },
17676    Lint {
17677        label: "clippy::bool_to_int_with_if",
17678        description: r##"Instead of using an if statement to convert a bool to an int,
17679this lint suggests using a `from()` function or an `as` coercion."##,
17680        default_severity: Severity::Allow,
17681        warn_since: None,
17682        deny_since: None,
17683    },
17684    Lint {
17685        label: "clippy::borrow_as_ptr",
17686        description: r##"Checks for the usage of `&expr as *const T` or
17687`&mut expr as *mut T`, and suggest using `ptr::addr_of` or
17688`ptr::addr_of_mut` instead."##,
17689        default_severity: Severity::Allow,
17690        warn_since: None,
17691        deny_since: None,
17692    },
17693    Lint {
17694        label: "clippy::borrow_deref_ref",
17695        description: r##"Checks for `&*(&T)`."##,
17696        default_severity: Severity::Allow,
17697        warn_since: None,
17698        deny_since: None,
17699    },
17700    Lint {
17701        label: "clippy::borrow_interior_mutable_const",
17702        description: r##"Checks if `const` items which is interior mutable (e.g.,
17703contains a `Cell`, `Mutex`, `AtomicXxxx`, etc.) has been borrowed directly."##,
17704        default_severity: Severity::Allow,
17705        warn_since: None,
17706        deny_since: None,
17707    },
17708    Lint {
17709        label: "clippy::borrowed_box",
17710        description: r##"Checks for usage of `&Box<T>` anywhere in the code.
17711Check the [Box documentation](https://doc.rust-lang.org/std/boxed/index.html) for more information."##,
17712        default_severity: Severity::Allow,
17713        warn_since: None,
17714        deny_since: None,
17715    },
17716    Lint {
17717        label: "clippy::box_collection",
17718        description: r##"Checks for usage of `Box<T>` where T is a collection such as Vec anywhere in the code.
17719Check the [Box documentation](https://doc.rust-lang.org/std/boxed/index.html) for more information."##,
17720        default_severity: Severity::Allow,
17721        warn_since: None,
17722        deny_since: None,
17723    },
17724    Lint {
17725        label: "clippy::box_default",
17726        description: r##"checks for `Box::new(Default::default())`, which can be written as
17727`Box::default()`."##,
17728        default_severity: Severity::Allow,
17729        warn_since: None,
17730        deny_since: None,
17731    },
17732    Lint {
17733        label: "clippy::boxed_local",
17734        description: r##"Checks for usage of `Box<T>` where an unboxed `T` would
17735work fine."##,
17736        default_severity: Severity::Allow,
17737        warn_since: None,
17738        deny_since: None,
17739    },
17740    Lint {
17741        label: "clippy::branches_sharing_code",
17742        description: r##"Checks if the `if` and `else` block contain shared code that can be
17743moved out of the blocks."##,
17744        default_severity: Severity::Allow,
17745        warn_since: None,
17746        deny_since: None,
17747    },
17748    Lint {
17749        label: "clippy::builtin_type_shadow",
17750        description: r##"Warns if a generic shadows a built-in type."##,
17751        default_severity: Severity::Allow,
17752        warn_since: None,
17753        deny_since: None,
17754    },
17755    Lint {
17756        label: "clippy::byte_char_slices",
17757        description: r##"Checks for hard to read slices of byte characters, that could be more easily expressed as a
17758byte string."##,
17759        default_severity: Severity::Allow,
17760        warn_since: None,
17761        deny_since: None,
17762    },
17763    Lint {
17764        label: "clippy::bytes_count_to_len",
17765        description: r##"It checks for `str::bytes().count()` and suggests replacing it with
17766`str::len()`."##,
17767        default_severity: Severity::Allow,
17768        warn_since: None,
17769        deny_since: None,
17770    },
17771    Lint {
17772        label: "clippy::bytes_nth",
17773        description: r##"Checks for the use of `.bytes().nth()`."##,
17774        default_severity: Severity::Allow,
17775        warn_since: None,
17776        deny_since: None,
17777    },
17778    Lint {
17779        label: "clippy::cargo_common_metadata",
17780        description: r##"Checks to see if all common metadata is defined in
17781`Cargo.toml`. See: https://rust-lang-nursery.github.io/api-guidelines/documentation.html#cargotoml-includes-all-common-metadata-c-metadata"##,
17782        default_severity: Severity::Allow,
17783        warn_since: None,
17784        deny_since: None,
17785    },
17786    Lint {
17787        label: "clippy::case_sensitive_file_extension_comparisons",
17788        description: r##"Checks for calls to `ends_with` with possible file extensions
17789and suggests to use a case-insensitive approach instead."##,
17790        default_severity: Severity::Allow,
17791        warn_since: None,
17792        deny_since: None,
17793    },
17794    Lint {
17795        label: "clippy::cast_abs_to_unsigned",
17796        description: r##"Checks for usage of the `abs()` method that cast the result to unsigned."##,
17797        default_severity: Severity::Allow,
17798        warn_since: None,
17799        deny_since: None,
17800    },
17801    Lint {
17802        label: "clippy::cast_enum_constructor",
17803        description: r##"Checks for casts from an enum tuple constructor to an integer."##,
17804        default_severity: Severity::Allow,
17805        warn_since: None,
17806        deny_since: None,
17807    },
17808    Lint {
17809        label: "clippy::cast_enum_truncation",
17810        description: r##"Checks for casts from an enum type to an integral type that will definitely truncate the
17811value."##,
17812        default_severity: Severity::Allow,
17813        warn_since: None,
17814        deny_since: None,
17815    },
17816    Lint {
17817        label: "clippy::cast_lossless",
17818        description: r##"Checks for casts between numeric types that can be replaced by safe
17819conversion functions."##,
17820        default_severity: Severity::Allow,
17821        warn_since: None,
17822        deny_since: None,
17823    },
17824    Lint {
17825        label: "clippy::cast_nan_to_int",
17826        description: r##"Checks for a known NaN float being cast to an integer"##,
17827        default_severity: Severity::Allow,
17828        warn_since: None,
17829        deny_since: None,
17830    },
17831    Lint {
17832        label: "clippy::cast_possible_truncation",
17833        description: r##"Checks for casts between numeric types that may
17834truncate large values. This is expected behavior, so the cast is `Allow` by
17835default. It suggests user either explicitly ignore the lint,
17836or use `try_from()` and handle the truncation, default, or panic explicitly."##,
17837        default_severity: Severity::Allow,
17838        warn_since: None,
17839        deny_since: None,
17840    },
17841    Lint {
17842        label: "clippy::cast_possible_wrap",
17843        description: r##"Checks for casts from an unsigned type to a signed type of
17844the same size, or possibly smaller due to target-dependent integers.
17845Performing such a cast is a no-op for the compiler (that is, nothing is
17846changed at the bit level), and the binary representation of the value is
17847reinterpreted. This can cause wrapping if the value is too big
17848for the target signed type. However, the cast works as defined, so this lint
17849is `Allow` by default."##,
17850        default_severity: Severity::Allow,
17851        warn_since: None,
17852        deny_since: None,
17853    },
17854    Lint {
17855        label: "clippy::cast_precision_loss",
17856        description: r##"Checks for casts from any numeric type to a float type where
17857the receiving type cannot store all values from the original type without
17858rounding errors. This possible rounding is to be expected, so this lint is
17859`Allow` by default.
17860
17861Basically, this warns on casting any integer with 32 or more bits to `f32`
17862or any 64-bit integer to `f64`."##,
17863        default_severity: Severity::Allow,
17864        warn_since: None,
17865        deny_since: None,
17866    },
17867    Lint {
17868        label: "clippy::cast_ptr_alignment",
17869        description: r##"Checks for casts, using `as` or `pointer::cast`, from a
17870less strictly aligned pointer to a more strictly aligned pointer."##,
17871        default_severity: Severity::Allow,
17872        warn_since: None,
17873        deny_since: None,
17874    },
17875    Lint {
17876        label: "clippy::cast_sign_loss",
17877        description: r##"Checks for casts from a signed to an unsigned numeric
17878type. In this case, negative values wrap around to large positive values,
17879which can be quite surprising in practice. However, since the cast works as
17880defined, this lint is `Allow` by default."##,
17881        default_severity: Severity::Allow,
17882        warn_since: None,
17883        deny_since: None,
17884    },
17885    Lint {
17886        label: "clippy::cast_slice_different_sizes",
17887        description: r##"Checks for `as` casts between raw pointers to slices with differently sized elements."##,
17888        default_severity: Severity::Allow,
17889        warn_since: None,
17890        deny_since: None,
17891    },
17892    Lint {
17893        label: "clippy::cast_slice_from_raw_parts",
17894        description: r##"Checks for a raw slice being cast to a slice pointer"##,
17895        default_severity: Severity::Allow,
17896        warn_since: None,
17897        deny_since: None,
17898    },
17899    Lint {
17900        label: "clippy::cfg_not_test",
17901        description: r##"Checks for usage of `cfg` that excludes code from `test` builds. (i.e., `#[cfg(not(test))]`)"##,
17902        default_severity: Severity::Allow,
17903        warn_since: None,
17904        deny_since: None,
17905    },
17906    Lint {
17907        label: "clippy::char_lit_as_u8",
17908        description: r##"Checks for expressions where a character literal is cast
17909to `u8` and suggests using a byte literal instead."##,
17910        default_severity: Severity::Allow,
17911        warn_since: None,
17912        deny_since: None,
17913    },
17914    Lint {
17915        label: "clippy::chars_last_cmp",
17916        description: r##"Checks for usage of `_.chars().last()` or
17917`_.chars().next_back()` on a `str` to check if it ends with a given char."##,
17918        default_severity: Severity::Allow,
17919        warn_since: None,
17920        deny_since: None,
17921    },
17922    Lint {
17923        label: "clippy::chars_next_cmp",
17924        description: r##"Checks for usage of `.chars().next()` on a `str` to check
17925if it starts with a given char."##,
17926        default_severity: Severity::Allow,
17927        warn_since: None,
17928        deny_since: None,
17929    },
17930    Lint {
17931        label: "clippy::checked_conversions",
17932        description: r##"Checks for explicit bounds checking when casting."##,
17933        default_severity: Severity::Allow,
17934        warn_since: None,
17935        deny_since: None,
17936    },
17937    Lint {
17938        label: "clippy::clear_with_drain",
17939        description: r##"Checks for usage of `.drain(..)` for the sole purpose of clearing a container."##,
17940        default_severity: Severity::Allow,
17941        warn_since: None,
17942        deny_since: None,
17943    },
17944    Lint {
17945        label: "clippy::clone_on_copy",
17946        description: r##"Checks for usage of `.clone()` on a `Copy` type."##,
17947        default_severity: Severity::Allow,
17948        warn_since: None,
17949        deny_since: None,
17950    },
17951    Lint {
17952        label: "clippy::clone_on_ref_ptr",
17953        description: r##"Checks for usage of `.clone()` on a ref-counted pointer,
17954(`Rc`, `Arc`, `rc::Weak`, or `sync::Weak`), and suggests calling Clone via unified
17955function syntax instead (e.g., `Rc::clone(foo)`)."##,
17956        default_severity: Severity::Allow,
17957        warn_since: None,
17958        deny_since: None,
17959    },
17960    Lint {
17961        label: "clippy::cloned_instead_of_copied",
17962        description: r##"Checks for usage of `cloned()` on an `Iterator` or `Option` where
17963`copied()` could be used instead."##,
17964        default_severity: Severity::Allow,
17965        warn_since: None,
17966        deny_since: None,
17967    },
17968    Lint {
17969        label: "clippy::cmp_null",
17970        description: r##"This lint checks for equality comparisons with `ptr::null`"##,
17971        default_severity: Severity::Allow,
17972        warn_since: None,
17973        deny_since: None,
17974    },
17975    Lint {
17976        label: "clippy::cmp_owned",
17977        description: r##"Checks for conversions to owned values just for the sake
17978of a comparison."##,
17979        default_severity: Severity::Allow,
17980        warn_since: None,
17981        deny_since: None,
17982    },
17983    Lint {
17984        label: "clippy::cognitive_complexity",
17985        description: r##"Checks for methods with high cognitive complexity."##,
17986        default_severity: Severity::Allow,
17987        warn_since: None,
17988        deny_since: None,
17989    },
17990    Lint {
17991        label: "clippy::collapsible_else_if",
17992        description: r##"Checks for collapsible `else { if ... }` expressions
17993that can be collapsed to `else if ...`."##,
17994        default_severity: Severity::Allow,
17995        warn_since: None,
17996        deny_since: None,
17997    },
17998    Lint {
17999        label: "clippy::collapsible_if",
18000        description: r##"Checks for nested `if` statements which can be collapsed
18001by `&&`-combining their conditions."##,
18002        default_severity: Severity::Allow,
18003        warn_since: None,
18004        deny_since: None,
18005    },
18006    Lint {
18007        label: "clippy::collapsible_match",
18008        description: r##"Finds nested `match` or `if let` expressions where the patterns may be collapsed together
18009without adding any branches.
18010
18011Note that this lint is not intended to find _all_ cases where nested match patterns can be merged, but only
18012cases where merging would most likely make the code more readable."##,
18013        default_severity: Severity::Allow,
18014        warn_since: None,
18015        deny_since: None,
18016    },
18017    Lint {
18018        label: "clippy::collapsible_str_replace",
18019        description: r##"Checks for consecutive calls to `str::replace` (2 or more)
18020that can be collapsed into a single call."##,
18021        default_severity: Severity::Allow,
18022        warn_since: None,
18023        deny_since: None,
18024    },
18025    Lint {
18026        label: "clippy::collection_is_never_read",
18027        description: r##"Checks for collections that are never queried."##,
18028        default_severity: Severity::Allow,
18029        warn_since: None,
18030        deny_since: None,
18031    },
18032    Lint {
18033        label: "clippy::comparison_chain",
18034        description: r##"Checks comparison chains written with `if` that can be
18035rewritten with `match` and `cmp`."##,
18036        default_severity: Severity::Allow,
18037        warn_since: None,
18038        deny_since: None,
18039    },
18040    Lint {
18041        label: "clippy::comparison_to_empty",
18042        description: r##"Checks for comparing to an empty slice such as `` or `[]`,
18043and suggests using `.is_empty()` where applicable."##,
18044        default_severity: Severity::Allow,
18045        warn_since: None,
18046        deny_since: None,
18047    },
18048    Lint {
18049        label: "clippy::const_is_empty",
18050        description: r##"It identifies calls to `.is_empty()` on constant values."##,
18051        default_severity: Severity::Allow,
18052        warn_since: None,
18053        deny_since: None,
18054    },
18055    Lint {
18056        label: "clippy::copy_iterator",
18057        description: r##"Checks for types that implement `Copy` as well as
18058`Iterator`."##,
18059        default_severity: Severity::Allow,
18060        warn_since: None,
18061        deny_since: None,
18062    },
18063    Lint {
18064        label: "clippy::crate_in_macro_def",
18065        description: r##"Checks for usage of `crate` as opposed to `$crate` in a macro definition."##,
18066        default_severity: Severity::Allow,
18067        warn_since: None,
18068        deny_since: None,
18069    },
18070    Lint {
18071        label: "clippy::create_dir",
18072        description: r##"Checks usage of `std::fs::create_dir` and suggest using `std::fs::create_dir_all` instead."##,
18073        default_severity: Severity::Allow,
18074        warn_since: None,
18075        deny_since: None,
18076    },
18077    Lint {
18078        label: "clippy::crosspointer_transmute",
18079        description: r##"Checks for transmutes between a type `T` and `*T`."##,
18080        default_severity: Severity::Allow,
18081        warn_since: None,
18082        deny_since: None,
18083    },
18084    Lint {
18085        label: "clippy::dbg_macro",
18086        description: r##"Checks for usage of the [`dbg!`](https://doc.rust-lang.org/std/macro.dbg.html) macro."##,
18087        default_severity: Severity::Allow,
18088        warn_since: None,
18089        deny_since: None,
18090    },
18091    Lint {
18092        label: "clippy::debug_assert_with_mut_call",
18093        description: r##"Checks for function/method calls with a mutable
18094parameter in `debug_assert!`, `debug_assert_eq!` and `debug_assert_ne!` macros."##,
18095        default_severity: Severity::Allow,
18096        warn_since: None,
18097        deny_since: None,
18098    },
18099    Lint {
18100        label: "clippy::decimal_literal_representation",
18101        description: r##"Warns if there is a better representation for a numeric literal."##,
18102        default_severity: Severity::Allow,
18103        warn_since: None,
18104        deny_since: None,
18105    },
18106    Lint {
18107        label: "clippy::declare_interior_mutable_const",
18108        description: r##"Checks for declaration of `const` items which is interior
18109mutable (e.g., contains a `Cell`, `Mutex`, `AtomicXxxx`, etc.)."##,
18110        default_severity: Severity::Allow,
18111        warn_since: None,
18112        deny_since: None,
18113    },
18114    Lint {
18115        label: "clippy::default_constructed_unit_structs",
18116        description: r##"Checks for construction on unit struct using `default`."##,
18117        default_severity: Severity::Allow,
18118        warn_since: None,
18119        deny_since: None,
18120    },
18121    Lint {
18122        label: "clippy::default_instead_of_iter_empty",
18123        description: r##"It checks for `std::iter::Empty::default()` and suggests replacing it with
18124`std::iter::empty()`."##,
18125        default_severity: Severity::Allow,
18126        warn_since: None,
18127        deny_since: None,
18128    },
18129    Lint {
18130        label: "clippy::default_numeric_fallback",
18131        description: r##"Checks for usage of unconstrained numeric literals which may cause default numeric fallback in type
18132inference.
18133
18134Default numeric fallback means that if numeric types have not yet been bound to concrete
18135types at the end of type inference, then integer type is bound to `i32`, and similarly
18136floating type is bound to `f64`.
18137
18138See [RFC0212](https://github.com/rust-lang/rfcs/blob/master/text/0212-restore-int-fallback.md) for more information about the fallback."##,
18139        default_severity: Severity::Allow,
18140        warn_since: None,
18141        deny_since: None,
18142    },
18143    Lint {
18144        label: "clippy::default_trait_access",
18145        description: r##"Checks for literal calls to `Default::default()`."##,
18146        default_severity: Severity::Allow,
18147        warn_since: None,
18148        deny_since: None,
18149    },
18150    Lint {
18151        label: "clippy::default_union_representation",
18152        description: r##"Displays a warning when a union is declared with the default representation (without a `#[repr(C)]` attribute)."##,
18153        default_severity: Severity::Allow,
18154        warn_since: None,
18155        deny_since: None,
18156    },
18157    Lint {
18158        label: "clippy::deprecated_cfg_attr",
18159        description: r##"Checks for `#[cfg_attr(rustfmt, rustfmt_skip)]` and suggests to replace it
18160with `#[rustfmt::skip]`."##,
18161        default_severity: Severity::Allow,
18162        warn_since: None,
18163        deny_since: None,
18164    },
18165    Lint {
18166        label: "clippy::deprecated_clippy_cfg_attr",
18167        description: r##"Checks for `#[cfg_attr(feature = cargo-clippy, ...)]` and for
18168`#[cfg(feature = cargo-clippy)]` and suggests to replace it with
18169`#[cfg_attr(clippy, ...)]` or `#[cfg(clippy)]`."##,
18170        default_severity: Severity::Allow,
18171        warn_since: None,
18172        deny_since: None,
18173    },
18174    Lint {
18175        label: "clippy::deprecated_semver",
18176        description: r##"Checks for `#[deprecated]` annotations with a `since`
18177field that is not a valid semantic version. Also allows TBD to signal
18178future deprecation."##,
18179        default_severity: Severity::Allow,
18180        warn_since: None,
18181        deny_since: None,
18182    },
18183    Lint {
18184        label: "clippy::deref_addrof",
18185        description: r##"Checks for usage of `*&` and `*&mut` in expressions."##,
18186        default_severity: Severity::Allow,
18187        warn_since: None,
18188        deny_since: None,
18189    },
18190    Lint {
18191        label: "clippy::deref_by_slicing",
18192        description: r##"Checks for slicing expressions which are equivalent to dereferencing the
18193value."##,
18194        default_severity: Severity::Allow,
18195        warn_since: None,
18196        deny_since: None,
18197    },
18198    Lint {
18199        label: "clippy::derivable_impls",
18200        description: r##"Detects manual `std::default::Default` implementations that are identical to a derived implementation."##,
18201        default_severity: Severity::Allow,
18202        warn_since: None,
18203        deny_since: None,
18204    },
18205    Lint {
18206        label: "clippy::derive_ord_xor_partial_ord",
18207        description: r##"Lints against manual `PartialOrd` and `Ord` implementations for types with a derived `Ord`
18208or `PartialOrd` implementation."##,
18209        default_severity: Severity::Allow,
18210        warn_since: None,
18211        deny_since: None,
18212    },
18213    Lint {
18214        label: "clippy::derive_partial_eq_without_eq",
18215        description: r##"Checks for types that derive `PartialEq` and could implement `Eq`."##,
18216        default_severity: Severity::Allow,
18217        warn_since: None,
18218        deny_since: None,
18219    },
18220    Lint {
18221        label: "clippy::derived_hash_with_manual_eq",
18222        description: r##"Lints against manual `PartialEq` implementations for types with a derived `Hash`
18223implementation."##,
18224        default_severity: Severity::Allow,
18225        warn_since: None,
18226        deny_since: None,
18227    },
18228    Lint {
18229        label: "clippy::disallowed_macros",
18230        description: r##"Denies the configured macros in clippy.toml
18231
18232Note: Even though this lint is warn-by-default, it will only trigger if
18233macros are defined in the clippy.toml file."##,
18234        default_severity: Severity::Allow,
18235        warn_since: None,
18236        deny_since: None,
18237    },
18238    Lint {
18239        label: "clippy::disallowed_methods",
18240        description: r##"Denies the configured methods and functions in clippy.toml
18241
18242Note: Even though this lint is warn-by-default, it will only trigger if
18243methods are defined in the clippy.toml file."##,
18244        default_severity: Severity::Allow,
18245        warn_since: None,
18246        deny_since: None,
18247    },
18248    Lint {
18249        label: "clippy::disallowed_names",
18250        description: r##"Checks for usage of disallowed names for variables, such
18251as `foo`."##,
18252        default_severity: Severity::Allow,
18253        warn_since: None,
18254        deny_since: None,
18255    },
18256    Lint {
18257        label: "clippy::disallowed_script_idents",
18258        description: r##"Checks for usage of unicode scripts other than those explicitly allowed
18259by the lint config.
18260
18261This lint doesn't take into account non-text scripts such as `Unknown` and `Linear_A`.
18262It also ignores the `Common` script type.
18263While configuring, be sure to use official script name [aliases] from
18264[the list of supported scripts][supported_scripts].
18265
18266See also: [`non_ascii_idents`].
18267
18268[aliases]: http://www.unicode.org/reports/tr24/tr24-31.html#Script_Value_Aliases
18269[supported_scripts]: https://www.unicode.org/iso15924/iso15924-codes.html"##,
18270        default_severity: Severity::Allow,
18271        warn_since: None,
18272        deny_since: None,
18273    },
18274    Lint {
18275        label: "clippy::disallowed_types",
18276        description: r##"Denies the configured types in clippy.toml.
18277
18278Note: Even though this lint is warn-by-default, it will only trigger if
18279types are defined in the clippy.toml file."##,
18280        default_severity: Severity::Allow,
18281        warn_since: None,
18282        deny_since: None,
18283    },
18284    Lint {
18285        label: "clippy::diverging_sub_expression",
18286        description: r##"Checks for diverging calls that are not match arms or
18287statements."##,
18288        default_severity: Severity::Allow,
18289        warn_since: None,
18290        deny_since: None,
18291    },
18292    Lint {
18293        label: "clippy::doc_lazy_continuation",
18294        description: r##"In CommonMark Markdown, the language used to write doc comments, a
18295paragraph nested within a list or block quote does not need any line
18296after the first one to be indented or marked. The specification calls
18297this a lazy paragraph continuation."##,
18298        default_severity: Severity::Allow,
18299        warn_since: None,
18300        deny_since: None,
18301    },
18302    Lint {
18303        label: "clippy::doc_link_with_quotes",
18304        description: r##"Detects the syntax `['foo']` in documentation comments (notice quotes instead of backticks)
18305outside of code blocks"##,
18306        default_severity: Severity::Allow,
18307        warn_since: None,
18308        deny_since: None,
18309    },
18310    Lint {
18311        label: "clippy::doc_markdown",
18312        description: r##"Checks for the presence of `_`, `::` or camel-case words
18313outside ticks in documentation."##,
18314        default_severity: Severity::Allow,
18315        warn_since: None,
18316        deny_since: None,
18317    },
18318    Lint {
18319        label: "clippy::double_comparisons",
18320        description: r##"Checks for double comparisons that could be simplified to a single expression."##,
18321        default_severity: Severity::Allow,
18322        warn_since: None,
18323        deny_since: None,
18324    },
18325    Lint {
18326        label: "clippy::double_must_use",
18327        description: r##"Checks for a `#[must_use]` attribute without
18328further information on functions and methods that return a type already
18329marked as `#[must_use]`."##,
18330        default_severity: Severity::Allow,
18331        warn_since: None,
18332        deny_since: None,
18333    },
18334    Lint {
18335        label: "clippy::double_neg",
18336        description: r##"Detects expressions of the form `--x`."##,
18337        default_severity: Severity::Allow,
18338        warn_since: None,
18339        deny_since: None,
18340    },
18341    Lint {
18342        label: "clippy::double_parens",
18343        description: r##"Checks for unnecessary double parentheses."##,
18344        default_severity: Severity::Allow,
18345        warn_since: None,
18346        deny_since: None,
18347    },
18348    Lint {
18349        label: "clippy::drain_collect",
18350        description: r##"Checks for calls to `.drain()` that clear the collection, immediately followed by a call to `.collect()`.
18351
18352> Collection in this context refers to any type with a `drain` method:
18353> `Vec`, `VecDeque`, `BinaryHeap`, `HashSet`,`HashMap`, `String`"##,
18354        default_severity: Severity::Allow,
18355        warn_since: None,
18356        deny_since: None,
18357    },
18358    Lint {
18359        label: "clippy::drop_non_drop",
18360        description: r##"Checks for calls to `std::mem::drop` with a value that does not implement `Drop`."##,
18361        default_severity: Severity::Allow,
18362        warn_since: None,
18363        deny_since: None,
18364    },
18365    Lint {
18366        label: "clippy::duplicate_mod",
18367        description: r##"Checks for files that are included as modules multiple times."##,
18368        default_severity: Severity::Allow,
18369        warn_since: None,
18370        deny_since: None,
18371    },
18372    Lint {
18373        label: "clippy::duplicate_underscore_argument",
18374        description: r##"Checks for function arguments having the similar names
18375differing by an underscore."##,
18376        default_severity: Severity::Allow,
18377        warn_since: None,
18378        deny_since: None,
18379    },
18380    Lint {
18381        label: "clippy::duplicated_attributes",
18382        description: r##"Checks for attributes that appear two or more times."##,
18383        default_severity: Severity::Allow,
18384        warn_since: None,
18385        deny_since: None,
18386    },
18387    Lint {
18388        label: "clippy::duration_subsec",
18389        description: r##"Checks for calculation of subsecond microseconds or milliseconds
18390from other `Duration` methods."##,
18391        default_severity: Severity::Allow,
18392        warn_since: None,
18393        deny_since: None,
18394    },
18395    Lint {
18396        label: "clippy::eager_transmute",
18397        description: r##"Checks for integer validity checks, followed by a transmute that is (incorrectly) evaluated
18398eagerly (e.g. using `bool::then_some`)."##,
18399        default_severity: Severity::Allow,
18400        warn_since: None,
18401        deny_since: None,
18402    },
18403    Lint {
18404        label: "clippy::else_if_without_else",
18405        description: r##"Checks for usage of if expressions with an `else if` branch,
18406but without a final `else` branch."##,
18407        default_severity: Severity::Allow,
18408        warn_since: None,
18409        deny_since: None,
18410    },
18411    Lint {
18412        label: "clippy::empty_docs",
18413        description: r##"Detects documentation that is empty."##,
18414        default_severity: Severity::Allow,
18415        warn_since: None,
18416        deny_since: None,
18417    },
18418    Lint {
18419        label: "clippy::empty_drop",
18420        description: r##"Checks for empty `Drop` implementations."##,
18421        default_severity: Severity::Allow,
18422        warn_since: None,
18423        deny_since: None,
18424    },
18425    Lint {
18426        label: "clippy::empty_enum",
18427        description: r##"Checks for `enum`s with no variants, which therefore are uninhabited types
18428(cannot be instantiated).
18429
18430As of this writing, the `never_type` is still a nightly-only experimental API.
18431Therefore, this lint is only triggered if `#![feature(never_type)]` is enabled."##,
18432        default_severity: Severity::Allow,
18433        warn_since: None,
18434        deny_since: None,
18435    },
18436    Lint {
18437        label: "clippy::empty_enum_variants_with_brackets",
18438        description: r##"Finds enum variants without fields that are declared with empty brackets."##,
18439        default_severity: Severity::Allow,
18440        warn_since: None,
18441        deny_since: None,
18442    },
18443    Lint {
18444        label: "clippy::empty_line_after_doc_comments",
18445        description: r##"Checks for empty lines after doc comments."##,
18446        default_severity: Severity::Allow,
18447        warn_since: None,
18448        deny_since: None,
18449    },
18450    Lint {
18451        label: "clippy::empty_line_after_outer_attr",
18452        description: r##"Checks for empty lines after outer attributes"##,
18453        default_severity: Severity::Allow,
18454        warn_since: None,
18455        deny_since: None,
18456    },
18457    Lint {
18458        label: "clippy::empty_loop",
18459        description: r##"Checks for empty `loop` expressions."##,
18460        default_severity: Severity::Allow,
18461        warn_since: None,
18462        deny_since: None,
18463    },
18464    Lint {
18465        label: "clippy::empty_structs_with_brackets",
18466        description: r##"Finds structs without fields (a so-called empty struct) that are declared with brackets."##,
18467        default_severity: Severity::Allow,
18468        warn_since: None,
18469        deny_since: None,
18470    },
18471    Lint {
18472        label: "clippy::enum_clike_unportable_variant",
18473        description: r##"Checks for C-like enumerations that are
18474`repr(isize/usize)` and have values that don't fit into an `i32`."##,
18475        default_severity: Severity::Allow,
18476        warn_since: None,
18477        deny_since: None,
18478    },
18479    Lint {
18480        label: "clippy::enum_glob_use",
18481        description: r##"Checks for `use Enum::*`."##,
18482        default_severity: Severity::Allow,
18483        warn_since: None,
18484        deny_since: None,
18485    },
18486    Lint {
18487        label: "clippy::enum_variant_names",
18488        description: r##"Detects enumeration variants that are prefixed or suffixed
18489by the same characters."##,
18490        default_severity: Severity::Allow,
18491        warn_since: None,
18492        deny_since: None,
18493    },
18494    Lint {
18495        label: "clippy::eq_op",
18496        description: r##"Checks for equal operands to comparison, logical and
18497bitwise, difference and division binary operators (`==`, `>`, etc., `&&`,
18498`||`, `&`, `|`, `^`, `-` and `/`)."##,
18499        default_severity: Severity::Allow,
18500        warn_since: None,
18501        deny_since: None,
18502    },
18503    Lint {
18504        label: "clippy::equatable_if_let",
18505        description: r##"Checks for pattern matchings that can be expressed using equality."##,
18506        default_severity: Severity::Allow,
18507        warn_since: None,
18508        deny_since: None,
18509    },
18510    Lint {
18511        label: "clippy::erasing_op",
18512        description: r##"Checks for erasing operations, e.g., `x * 0`."##,
18513        default_severity: Severity::Allow,
18514        warn_since: None,
18515        deny_since: None,
18516    },
18517    Lint {
18518        label: "clippy::err_expect",
18519        description: r##"Checks for `.err().expect()` calls on the `Result` type."##,
18520        default_severity: Severity::Allow,
18521        warn_since: None,
18522        deny_since: None,
18523    },
18524    Lint {
18525        label: "clippy::error_impl_error",
18526        description: r##"Checks for types named `Error` that implement `Error`."##,
18527        default_severity: Severity::Allow,
18528        warn_since: None,
18529        deny_since: None,
18530    },
18531    Lint {
18532        label: "clippy::excessive_nesting",
18533        description: r##"Checks for blocks which are nested beyond a certain threshold.
18534
18535Note: Even though this lint is warn-by-default, it will only trigger if a maximum nesting level is defined in the clippy.toml file."##,
18536        default_severity: Severity::Allow,
18537        warn_since: None,
18538        deny_since: None,
18539    },
18540    Lint {
18541        label: "clippy::excessive_precision",
18542        description: r##"Checks for float literals with a precision greater
18543than that supported by the underlying type."##,
18544        default_severity: Severity::Allow,
18545        warn_since: None,
18546        deny_since: None,
18547    },
18548    Lint {
18549        label: "clippy::exhaustive_enums",
18550        description: r##"Warns on any exported `enum`s that are not tagged `#[non_exhaustive]`"##,
18551        default_severity: Severity::Allow,
18552        warn_since: None,
18553        deny_since: None,
18554    },
18555    Lint {
18556        label: "clippy::exhaustive_structs",
18557        description: r##"Warns on any exported `struct`s that are not tagged `#[non_exhaustive]`"##,
18558        default_severity: Severity::Allow,
18559        warn_since: None,
18560        deny_since: None,
18561    },
18562    Lint {
18563        label: "clippy::exit",
18564        description: r##"Detects calls to the `exit()` function which terminates the program."##,
18565        default_severity: Severity::Allow,
18566        warn_since: None,
18567        deny_since: None,
18568    },
18569    Lint {
18570        label: "clippy::expect_fun_call",
18571        description: r##"Checks for calls to `.expect(&format!(...))`, `.expect(foo(..))`,
18572etc., and suggests to use `unwrap_or_else` instead"##,
18573        default_severity: Severity::Allow,
18574        warn_since: None,
18575        deny_since: None,
18576    },
18577    Lint {
18578        label: "clippy::expect_used",
18579        description: r##"Checks for `.expect()` or `.expect_err()` calls on `Result`s and `.expect()` call on `Option`s."##,
18580        default_severity: Severity::Allow,
18581        warn_since: None,
18582        deny_since: None,
18583    },
18584    Lint {
18585        label: "clippy::expl_impl_clone_on_copy",
18586        description: r##"Checks for explicit `Clone` implementations for `Copy`
18587types."##,
18588        default_severity: Severity::Allow,
18589        warn_since: None,
18590        deny_since: None,
18591    },
18592    Lint {
18593        label: "clippy::explicit_auto_deref",
18594        description: r##"Checks for dereferencing expressions which would be covered by auto-deref."##,
18595        default_severity: Severity::Allow,
18596        warn_since: None,
18597        deny_since: None,
18598    },
18599    Lint {
18600        label: "clippy::explicit_counter_loop",
18601        description: r##"Checks `for` loops over slices with an explicit counter
18602and suggests the use of `.enumerate()`."##,
18603        default_severity: Severity::Allow,
18604        warn_since: None,
18605        deny_since: None,
18606    },
18607    Lint {
18608        label: "clippy::explicit_deref_methods",
18609        description: r##"Checks for explicit `deref()` or `deref_mut()` method calls."##,
18610        default_severity: Severity::Allow,
18611        warn_since: None,
18612        deny_since: None,
18613    },
18614    Lint {
18615        label: "clippy::explicit_into_iter_loop",
18616        description: r##"Checks for loops on `y.into_iter()` where `y` will do, and
18617suggests the latter."##,
18618        default_severity: Severity::Allow,
18619        warn_since: None,
18620        deny_since: None,
18621    },
18622    Lint {
18623        label: "clippy::explicit_iter_loop",
18624        description: r##"Checks for loops on `x.iter()` where `&x` will do, and
18625suggests the latter."##,
18626        default_severity: Severity::Allow,
18627        warn_since: None,
18628        deny_since: None,
18629    },
18630    Lint {
18631        label: "clippy::explicit_write",
18632        description: r##"Checks for usage of `write!()` / `writeln()!` which can be
18633replaced with `(e)print!()` / `(e)println!()`"##,
18634        default_severity: Severity::Allow,
18635        warn_since: None,
18636        deny_since: None,
18637    },
18638    Lint {
18639        label: "clippy::extend_from_slice",
18640        description: r##"Nothing. This lint has been deprecated"##,
18641        default_severity: Severity::Allow,
18642        warn_since: None,
18643        deny_since: None,
18644    },
18645    Lint {
18646        label: "clippy::extend_with_drain",
18647        description: r##"Checks for occurrences where one vector gets extended instead of append"##,
18648        default_severity: Severity::Allow,
18649        warn_since: None,
18650        deny_since: None,
18651    },
18652    Lint {
18653        label: "clippy::extra_unused_lifetimes",
18654        description: r##"Checks for lifetimes in generics that are never used
18655anywhere else."##,
18656        default_severity: Severity::Allow,
18657        warn_since: None,
18658        deny_since: None,
18659    },
18660    Lint {
18661        label: "clippy::extra_unused_type_parameters",
18662        description: r##"Checks for type parameters in generics that are never used anywhere else."##,
18663        default_severity: Severity::Allow,
18664        warn_since: None,
18665        deny_since: None,
18666    },
18667    Lint {
18668        label: "clippy::fallible_impl_from",
18669        description: r##"Checks for impls of `From<..>` that contain `panic!()` or `unwrap()`"##,
18670        default_severity: Severity::Allow,
18671        warn_since: None,
18672        deny_since: None,
18673    },
18674    Lint {
18675        label: "clippy::field_reassign_with_default",
18676        description: r##"Checks for immediate reassignment of fields initialized
18677with Default::default()."##,
18678        default_severity: Severity::Allow,
18679        warn_since: None,
18680        deny_since: None,
18681    },
18682    Lint {
18683        label: "clippy::field_scoped_visibility_modifiers",
18684        description: r##"Checks for usage of scoped visibility modifiers, like `pub(crate)`, on fields. These
18685make a field visible within a scope between public and private."##,
18686        default_severity: Severity::Allow,
18687        warn_since: None,
18688        deny_since: None,
18689    },
18690    Lint {
18691        label: "clippy::filetype_is_file",
18692        description: r##"Checks for `FileType::is_file()`."##,
18693        default_severity: Severity::Allow,
18694        warn_since: None,
18695        deny_since: None,
18696    },
18697    Lint {
18698        label: "clippy::filter_map_bool_then",
18699        description: r##"Checks for usage of `bool::then` in `Iterator::filter_map`."##,
18700        default_severity: Severity::Allow,
18701        warn_since: None,
18702        deny_since: None,
18703    },
18704    Lint {
18705        label: "clippy::filter_map_identity",
18706        description: r##"Checks for usage of `filter_map(|x| x)`."##,
18707        default_severity: Severity::Allow,
18708        warn_since: None,
18709        deny_since: None,
18710    },
18711    Lint {
18712        label: "clippy::filter_map_next",
18713        description: r##"Checks for usage of `_.filter_map(_).next()`."##,
18714        default_severity: Severity::Allow,
18715        warn_since: None,
18716        deny_since: None,
18717    },
18718    Lint {
18719        label: "clippy::filter_next",
18720        description: r##"Checks for usage of `_.filter(_).next()`."##,
18721        default_severity: Severity::Allow,
18722        warn_since: None,
18723        deny_since: None,
18724    },
18725    Lint {
18726        label: "clippy::flat_map_identity",
18727        description: r##"Checks for usage of `flat_map(|x| x)`."##,
18728        default_severity: Severity::Allow,
18729        warn_since: None,
18730        deny_since: None,
18731    },
18732    Lint {
18733        label: "clippy::flat_map_option",
18734        description: r##"Checks for usage of `Iterator::flat_map()` where `filter_map()` could be
18735used instead."##,
18736        default_severity: Severity::Allow,
18737        warn_since: None,
18738        deny_since: None,
18739    },
18740    Lint {
18741        label: "clippy::float_arithmetic",
18742        description: r##"Checks for float arithmetic."##,
18743        default_severity: Severity::Allow,
18744        warn_since: None,
18745        deny_since: None,
18746    },
18747    Lint {
18748        label: "clippy::float_cmp",
18749        description: r##"Checks for (in-)equality comparisons on floating-point
18750values (apart from zero), except in functions called `*eq*` (which probably
18751implement equality for a type involving floats)."##,
18752        default_severity: Severity::Allow,
18753        warn_since: None,
18754        deny_since: None,
18755    },
18756    Lint {
18757        label: "clippy::float_cmp_const",
18758        description: r##"Checks for (in-)equality comparisons on constant floating-point
18759values (apart from zero), except in functions called `*eq*` (which probably
18760implement equality for a type involving floats)."##,
18761        default_severity: Severity::Allow,
18762        warn_since: None,
18763        deny_since: None,
18764    },
18765    Lint {
18766        label: "clippy::float_equality_without_abs",
18767        description: r##"Checks for statements of the form `(a - b) < f32::EPSILON` or
18768`(a - b) < f64::EPSILON`. Notes the missing `.abs()`."##,
18769        default_severity: Severity::Allow,
18770        warn_since: None,
18771        deny_since: None,
18772    },
18773    Lint {
18774        label: "clippy::fn_address_comparisons",
18775        description: r##"Checks for comparisons with an address of a function item."##,
18776        default_severity: Severity::Allow,
18777        warn_since: None,
18778        deny_since: None,
18779    },
18780    Lint {
18781        label: "clippy::fn_params_excessive_bools",
18782        description: r##"Checks for excessive use of
18783bools in function definitions."##,
18784        default_severity: Severity::Allow,
18785        warn_since: None,
18786        deny_since: None,
18787    },
18788    Lint {
18789        label: "clippy::fn_to_numeric_cast",
18790        description: r##"Checks for casts of function pointers to something other than `usize`."##,
18791        default_severity: Severity::Allow,
18792        warn_since: None,
18793        deny_since: None,
18794    },
18795    Lint {
18796        label: "clippy::fn_to_numeric_cast_any",
18797        description: r##"Checks for casts of a function pointer to any integer type."##,
18798        default_severity: Severity::Allow,
18799        warn_since: None,
18800        deny_since: None,
18801    },
18802    Lint {
18803        label: "clippy::fn_to_numeric_cast_with_truncation",
18804        description: r##"Checks for casts of a function pointer to a numeric type not wide enough to
18805store an address."##,
18806        default_severity: Severity::Allow,
18807        warn_since: None,
18808        deny_since: None,
18809    },
18810    Lint {
18811        label: "clippy::for_kv_map",
18812        description: r##"Checks for iterating a map (`HashMap` or `BTreeMap`) and
18813ignoring either the keys or values."##,
18814        default_severity: Severity::Allow,
18815        warn_since: None,
18816        deny_since: None,
18817    },
18818    Lint {
18819        label: "clippy::forget_non_drop",
18820        description: r##"Checks for calls to `std::mem::forget` with a value that does not implement `Drop`."##,
18821        default_severity: Severity::Allow,
18822        warn_since: None,
18823        deny_since: None,
18824    },
18825    Lint {
18826        label: "clippy::format_collect",
18827        description: r##"Checks for usage of `.map(|_| format!(..)).collect::<String>()`."##,
18828        default_severity: Severity::Allow,
18829        warn_since: None,
18830        deny_since: None,
18831    },
18832    Lint {
18833        label: "clippy::format_in_format_args",
18834        description: r##"Detects `format!` within the arguments of another macro that does
18835formatting such as `format!` itself, `write!` or `println!`. Suggests
18836inlining the `format!` call."##,
18837        default_severity: Severity::Allow,
18838        warn_since: None,
18839        deny_since: None,
18840    },
18841    Lint {
18842        label: "clippy::format_push_string",
18843        description: r##"Detects cases where the result of a `format!` call is
18844appended to an existing `String`."##,
18845        default_severity: Severity::Allow,
18846        warn_since: None,
18847        deny_since: None,
18848    },
18849    Lint {
18850        label: "clippy::four_forward_slashes",
18851        description: r##"Checks for outer doc comments written with 4 forward slashes (`////`)."##,
18852        default_severity: Severity::Allow,
18853        warn_since: None,
18854        deny_since: None,
18855    },
18856    Lint {
18857        label: "clippy::from_iter_instead_of_collect",
18858        description: r##"Checks for `from_iter()` function calls on types that implement the `FromIterator`
18859trait."##,
18860        default_severity: Severity::Allow,
18861        warn_since: None,
18862        deny_since: None,
18863    },
18864    Lint {
18865        label: "clippy::from_over_into",
18866        description: r##"Searches for implementations of the `Into<..>` trait and suggests to implement `From<..>` instead."##,
18867        default_severity: Severity::Allow,
18868        warn_since: None,
18869        deny_since: None,
18870    },
18871    Lint {
18872        label: "clippy::from_raw_with_void_ptr",
18873        description: r##"Checks if we're passing a `c_void` raw pointer to `{Box,Rc,Arc,Weak}::from_raw(_)`"##,
18874        default_severity: Severity::Allow,
18875        warn_since: None,
18876        deny_since: None,
18877    },
18878    Lint {
18879        label: "clippy::from_str_radix_10",
18880        description: r##"Checks for function invocations of the form `primitive::from_str_radix(s, 10)`"##,
18881        default_severity: Severity::Allow,
18882        warn_since: None,
18883        deny_since: None,
18884    },
18885    Lint {
18886        label: "clippy::future_not_send",
18887        description: r##"This lint requires Future implementations returned from
18888functions and methods to implement the `Send` marker trait. It is mostly
18889used by library authors (public and internal) that target an audience where
18890multithreaded executors are likely to be used for running these Futures."##,
18891        default_severity: Severity::Allow,
18892        warn_since: None,
18893        deny_since: None,
18894    },
18895    Lint {
18896        label: "clippy::get_first",
18897        description: r##"Checks for usage of `x.get(0)` instead of
18898`x.first()` or `x.front()`."##,
18899        default_severity: Severity::Allow,
18900        warn_since: None,
18901        deny_since: None,
18902    },
18903    Lint {
18904        label: "clippy::get_last_with_len",
18905        description: r##"Checks for usage of `x.get(x.len() - 1)` instead of
18906`x.last()`."##,
18907        default_severity: Severity::Allow,
18908        warn_since: None,
18909        deny_since: None,
18910    },
18911    Lint {
18912        label: "clippy::get_unwrap",
18913        description: r##"Checks for usage of `.get().unwrap()` (or
18914`.get_mut().unwrap`) on a standard library type which implements `Index`"##,
18915        default_severity: Severity::Allow,
18916        warn_since: None,
18917        deny_since: None,
18918    },
18919    Lint {
18920        label: "clippy::host_endian_bytes",
18921        description: r##"Checks for the usage of the `to_ne_bytes` method and/or the function `from_ne_bytes`."##,
18922        default_severity: Severity::Allow,
18923        warn_since: None,
18924        deny_since: None,
18925    },
18926    Lint {
18927        label: "clippy::identity_op",
18928        description: r##"Checks for identity operations, e.g., `x + 0`."##,
18929        default_severity: Severity::Allow,
18930        warn_since: None,
18931        deny_since: None,
18932    },
18933    Lint {
18934        label: "clippy::if_let_mutex",
18935        description: r##"Checks for `Mutex::lock` calls in `if let` expression
18936with lock calls in any of the else blocks."##,
18937        default_severity: Severity::Allow,
18938        warn_since: None,
18939        deny_since: None,
18940    },
18941    Lint {
18942        label: "clippy::if_not_else",
18943        description: r##"Checks for usage of `!` or `!=` in an if condition with an
18944else branch."##,
18945        default_severity: Severity::Allow,
18946        warn_since: None,
18947        deny_since: None,
18948    },
18949    Lint {
18950        label: "clippy::if_same_then_else",
18951        description: r##"Checks for `if/else` with the same body as the *then* part
18952and the *else* part."##,
18953        default_severity: Severity::Allow,
18954        warn_since: None,
18955        deny_since: None,
18956    },
18957    Lint {
18958        label: "clippy::if_then_some_else_none",
18959        description: r##"Checks for if-else that could be written using either `bool::then` or `bool::then_some`."##,
18960        default_severity: Severity::Allow,
18961        warn_since: None,
18962        deny_since: None,
18963    },
18964    Lint {
18965        label: "clippy::ifs_same_cond",
18966        description: r##"Checks for consecutive `if`s with the same condition."##,
18967        default_severity: Severity::Allow,
18968        warn_since: None,
18969        deny_since: None,
18970    },
18971    Lint {
18972        label: "clippy::ignored_unit_patterns",
18973        description: r##"Checks for usage of `_` in patterns of type `()`."##,
18974        default_severity: Severity::Allow,
18975        warn_since: None,
18976        deny_since: None,
18977    },
18978    Lint {
18979        label: "clippy::impl_hash_borrow_with_str_and_bytes",
18980        description: r##"This lint is concerned with the semantics of `Borrow` and `Hash` for a
18981type that implements all three of `Hash`, `Borrow<str>` and `Borrow<[u8]>`
18982as it is impossible to satisfy the semantics of Borrow and `Hash` for
18983both `Borrow<str>` and `Borrow<[u8]>`."##,
18984        default_severity: Severity::Allow,
18985        warn_since: None,
18986        deny_since: None,
18987    },
18988    Lint {
18989        label: "clippy::impl_trait_in_params",
18990        description: r##"Lints when `impl Trait` is being used in a function's parameters."##,
18991        default_severity: Severity::Allow,
18992        warn_since: None,
18993        deny_since: None,
18994    },
18995    Lint {
18996        label: "clippy::implicit_clone",
18997        description: r##"Checks for the usage of `_.to_owned()`, `vec.to_vec()`, or similar when calling `_.clone()` would be clearer."##,
18998        default_severity: Severity::Allow,
18999        warn_since: None,
19000        deny_since: None,
19001    },
19002    Lint {
19003        label: "clippy::implicit_hasher",
19004        description: r##"Checks for public `impl` or `fn` missing generalization
19005over different hashers and implicitly defaulting to the default hashing
19006algorithm (`SipHash`)."##,
19007        default_severity: Severity::Allow,
19008        warn_since: None,
19009        deny_since: None,
19010    },
19011    Lint {
19012        label: "clippy::implicit_return",
19013        description: r##"Checks for missing return statements at the end of a block."##,
19014        default_severity: Severity::Allow,
19015        warn_since: None,
19016        deny_since: None,
19017    },
19018    Lint {
19019        label: "clippy::implicit_saturating_add",
19020        description: r##"Checks for implicit saturating addition."##,
19021        default_severity: Severity::Allow,
19022        warn_since: None,
19023        deny_since: None,
19024    },
19025    Lint {
19026        label: "clippy::implicit_saturating_sub",
19027        description: r##"Checks for implicit saturating subtraction."##,
19028        default_severity: Severity::Allow,
19029        warn_since: None,
19030        deny_since: None,
19031    },
19032    Lint {
19033        label: "clippy::implied_bounds_in_impls",
19034        description: r##"Looks for bounds in `impl Trait` in return position that are implied by other bounds.
19035This can happen when a trait is specified that another trait already has as a supertrait
19036(e.g. `fn() -> impl Deref + DerefMut<Target = i32>` has an unnecessary `Deref` bound,
19037because `Deref` is a supertrait of `DerefMut`)"##,
19038        default_severity: Severity::Allow,
19039        warn_since: None,
19040        deny_since: None,
19041    },
19042    Lint {
19043        label: "clippy::impossible_comparisons",
19044        description: r##"Checks for double comparisons that can never succeed"##,
19045        default_severity: Severity::Allow,
19046        warn_since: None,
19047        deny_since: None,
19048    },
19049    Lint {
19050        label: "clippy::imprecise_flops",
19051        description: r##"Looks for floating-point expressions that
19052can be expressed using built-in methods to improve accuracy
19053at the cost of performance."##,
19054        default_severity: Severity::Allow,
19055        warn_since: None,
19056        deny_since: None,
19057    },
19058    Lint {
19059        label: "clippy::incompatible_msrv",
19060        description: r##"This lint checks that no function newer than the defined MSRV (minimum
19061supported rust version) is used in the crate."##,
19062        default_severity: Severity::Allow,
19063        warn_since: None,
19064        deny_since: None,
19065    },
19066    Lint {
19067        label: "clippy::inconsistent_digit_grouping",
19068        description: r##"Warns if an integral or floating-point constant is
19069grouped inconsistently with underscores."##,
19070        default_severity: Severity::Allow,
19071        warn_since: None,
19072        deny_since: None,
19073    },
19074    Lint {
19075        label: "clippy::inconsistent_struct_constructor",
19076        description: r##"Checks for struct constructors where all fields are shorthand and
19077the order of the field init shorthand in the constructor is inconsistent
19078with the order in the struct definition."##,
19079        default_severity: Severity::Allow,
19080        warn_since: None,
19081        deny_since: None,
19082    },
19083    Lint {
19084        label: "clippy::index_refutable_slice",
19085        description: r##"The lint checks for slice bindings in patterns that are only used to
19086access individual slice values."##,
19087        default_severity: Severity::Allow,
19088        warn_since: None,
19089        deny_since: None,
19090    },
19091    Lint {
19092        label: "clippy::indexing_slicing",
19093        description: r##"Checks for usage of indexing or slicing. Arrays are special cases, this lint
19094does report on arrays if we can tell that slicing operations are in bounds and does not
19095lint on constant `usize` indexing on arrays because that is handled by rustc's `const_err` lint."##,
19096        default_severity: Severity::Allow,
19097        warn_since: None,
19098        deny_since: None,
19099    },
19100    Lint {
19101        label: "clippy::ineffective_bit_mask",
19102        description: r##"Checks for bit masks in comparisons which can be removed
19103without changing the outcome. The basic structure can be seen in the
19104following table:
19105
19106|Comparison| Bit Op   |Example     |equals |
19107|----------|----------|------------|-------|
19108|`>` / `<=`|`\\|` / `^`|`x \\| 2 > 3`|`x > 3`|
19109|`<` / `>=`|`\\|` / `^`|`x ^ 1 < 4` |`x < 4`|"##,
19110        default_severity: Severity::Allow,
19111        warn_since: None,
19112        deny_since: None,
19113    },
19114    Lint {
19115        label: "clippy::ineffective_open_options",
19116        description: r##"Checks if both `.write(true)` and `.append(true)` methods are called
19117on a same `OpenOptions`."##,
19118        default_severity: Severity::Allow,
19119        warn_since: None,
19120        deny_since: None,
19121    },
19122    Lint {
19123        label: "clippy::inefficient_to_string",
19124        description: r##"Checks for usage of `.to_string()` on an `&&T` where
19125`T` implements `ToString` directly (like `&&str` or `&&String`)."##,
19126        default_severity: Severity::Allow,
19127        warn_since: None,
19128        deny_since: None,
19129    },
19130    Lint {
19131        label: "clippy::infallible_destructuring_match",
19132        description: r##"Checks for matches being used to destructure a single-variant enum
19133or tuple struct where a `let` will suffice."##,
19134        default_severity: Severity::Allow,
19135        warn_since: None,
19136        deny_since: None,
19137    },
19138    Lint {
19139        label: "clippy::infinite_iter",
19140        description: r##"Checks for iteration that is guaranteed to be infinite."##,
19141        default_severity: Severity::Allow,
19142        warn_since: None,
19143        deny_since: None,
19144    },
19145    Lint {
19146        label: "clippy::infinite_loop",
19147        description: r##"Checks for infinite loops in a function where the return type is not `!`
19148and lint accordingly."##,
19149        default_severity: Severity::Allow,
19150        warn_since: None,
19151        deny_since: None,
19152    },
19153    Lint {
19154        label: "clippy::inherent_to_string",
19155        description: r##"Checks for the definition of inherent methods with a signature of `to_string(&self) -> String`."##,
19156        default_severity: Severity::Allow,
19157        warn_since: None,
19158        deny_since: None,
19159    },
19160    Lint {
19161        label: "clippy::inherent_to_string_shadow_display",
19162        description: r##"Checks for the definition of inherent methods with a signature of `to_string(&self) -> String` and if the type implementing this method also implements the `Display` trait."##,
19163        default_severity: Severity::Allow,
19164        warn_since: None,
19165        deny_since: None,
19166    },
19167    Lint {
19168        label: "clippy::init_numbered_fields",
19169        description: r##"Checks for tuple structs initialized with field syntax.
19170It will however not lint if a base initializer is present.
19171The lint will also ignore code in macros."##,
19172        default_severity: Severity::Allow,
19173        warn_since: None,
19174        deny_since: None,
19175    },
19176    Lint {
19177        label: "clippy::inline_always",
19178        description: r##"Checks for items annotated with `#[inline(always)]`,
19179unless the annotated function is empty or simply panics."##,
19180        default_severity: Severity::Allow,
19181        warn_since: None,
19182        deny_since: None,
19183    },
19184    Lint {
19185        label: "clippy::inline_asm_x86_att_syntax",
19186        description: r##"Checks for usage of AT&T x86 assembly syntax."##,
19187        default_severity: Severity::Allow,
19188        warn_since: None,
19189        deny_since: None,
19190    },
19191    Lint {
19192        label: "clippy::inline_asm_x86_intel_syntax",
19193        description: r##"Checks for usage of Intel x86 assembly syntax."##,
19194        default_severity: Severity::Allow,
19195        warn_since: None,
19196        deny_since: None,
19197    },
19198    Lint {
19199        label: "clippy::inline_fn_without_body",
19200        description: r##"Checks for `#[inline]` on trait methods without bodies"##,
19201        default_severity: Severity::Allow,
19202        warn_since: None,
19203        deny_since: None,
19204    },
19205    Lint {
19206        label: "clippy::inspect_for_each",
19207        description: r##"Checks for usage of `inspect().for_each()`."##,
19208        default_severity: Severity::Allow,
19209        warn_since: None,
19210        deny_since: None,
19211    },
19212    Lint {
19213        label: "clippy::int_plus_one",
19214        description: r##"Checks for usage of `x >= y + 1` or `x - 1 >= y` (and `<=`) in a block"##,
19215        default_severity: Severity::Allow,
19216        warn_since: None,
19217        deny_since: None,
19218    },
19219    Lint {
19220        label: "clippy::integer_division",
19221        description: r##"Checks for division of integers"##,
19222        default_severity: Severity::Allow,
19223        warn_since: None,
19224        deny_since: None,
19225    },
19226    Lint {
19227        label: "clippy::integer_division_remainder_used",
19228        description: r##"Checks for the usage of division (`/`) and remainder (`%`) operations
19229when performed on any integer types using the default `Div` and `Rem` trait implementations."##,
19230        default_severity: Severity::Allow,
19231        warn_since: None,
19232        deny_since: None,
19233    },
19234    Lint {
19235        label: "clippy::into_iter_on_ref",
19236        description: r##"Checks for `into_iter` calls on references which should be replaced by `iter`
19237or `iter_mut`."##,
19238        default_severity: Severity::Allow,
19239        warn_since: None,
19240        deny_since: None,
19241    },
19242    Lint {
19243        label: "clippy::into_iter_without_iter",
19244        description: r##"This is the opposite of the `iter_without_into_iter` lint.
19245It looks for `IntoIterator for (&|&mut) Type` implementations without an inherent `iter` or `iter_mut` method
19246on the type or on any of the types in its `Deref` chain."##,
19247        default_severity: Severity::Allow,
19248        warn_since: None,
19249        deny_since: None,
19250    },
19251    Lint {
19252        label: "clippy::invalid_null_ptr_usage",
19253        description: r##"This lint checks for invalid usages of `ptr::null`."##,
19254        default_severity: Severity::Allow,
19255        warn_since: None,
19256        deny_since: None,
19257    },
19258    Lint {
19259        label: "clippy::invalid_regex",
19260        description: r##"Checks [regex](https://crates.io/crates/regex) creation
19261(with `Regex::new`, `RegexBuilder::new`, or `RegexSet::new`) for correct
19262regex syntax."##,
19263        default_severity: Severity::Allow,
19264        warn_since: None,
19265        deny_since: None,
19266    },
19267    Lint {
19268        label: "clippy::invalid_upcast_comparisons",
19269        description: r##"Checks for comparisons where the relation is always either
19270true or false, but where one side has been upcast so that the comparison is
19271necessary. Only integer types are checked."##,
19272        default_severity: Severity::Allow,
19273        warn_since: None,
19274        deny_since: None,
19275    },
19276    Lint {
19277        label: "clippy::inverted_saturating_sub",
19278        description: r##"Checks for comparisons between integers, followed by subtracting the greater value from the
19279lower one."##,
19280        default_severity: Severity::Allow,
19281        warn_since: None,
19282        deny_since: None,
19283    },
19284    Lint {
19285        label: "clippy::invisible_characters",
19286        description: r##"Checks for invisible Unicode characters in the code."##,
19287        default_severity: Severity::Allow,
19288        warn_since: None,
19289        deny_since: None,
19290    },
19291    Lint {
19292        label: "clippy::is_digit_ascii_radix",
19293        description: r##"Finds usages of [`char::is_digit`](https://doc.rust-lang.org/stable/std/primitive.char.html#method.is_digit) that
19294can be replaced with [`is_ascii_digit`](https://doc.rust-lang.org/stable/std/primitive.char.html#method.is_ascii_digit) or
19295[`is_ascii_hexdigit`](https://doc.rust-lang.org/stable/std/primitive.char.html#method.is_ascii_hexdigit)."##,
19296        default_severity: Severity::Allow,
19297        warn_since: None,
19298        deny_since: None,
19299    },
19300    Lint {
19301        label: "clippy::items_after_statements",
19302        description: r##"Checks for items declared after some statement in a block."##,
19303        default_severity: Severity::Allow,
19304        warn_since: None,
19305        deny_since: None,
19306    },
19307    Lint {
19308        label: "clippy::items_after_test_module",
19309        description: r##"Triggers if an item is declared after the testing module marked with `#[cfg(test)]`."##,
19310        default_severity: Severity::Allow,
19311        warn_since: None,
19312        deny_since: None,
19313    },
19314    Lint {
19315        label: "clippy::iter_cloned_collect",
19316        description: r##"Checks for the use of `.cloned().collect()` on slice to
19317create a `Vec`."##,
19318        default_severity: Severity::Allow,
19319        warn_since: None,
19320        deny_since: None,
19321    },
19322    Lint {
19323        label: "clippy::iter_count",
19324        description: r##"Checks for the use of `.iter().count()`."##,
19325        default_severity: Severity::Allow,
19326        warn_since: None,
19327        deny_since: None,
19328    },
19329    Lint {
19330        label: "clippy::iter_filter_is_ok",
19331        description: r##"Checks for usage of `.filter(Result::is_ok)` that may be replaced with a `.flatten()` call.
19332This lint will require additional changes to the follow-up calls as it affects the type."##,
19333        default_severity: Severity::Allow,
19334        warn_since: None,
19335        deny_since: None,
19336    },
19337    Lint {
19338        label: "clippy::iter_filter_is_some",
19339        description: r##"Checks for usage of `.filter(Option::is_some)` that may be replaced with a `.flatten()` call.
19340This lint will require additional changes to the follow-up calls as it affects the type."##,
19341        default_severity: Severity::Allow,
19342        warn_since: None,
19343        deny_since: None,
19344    },
19345    Lint {
19346        label: "clippy::iter_kv_map",
19347        description: r##"Checks for iterating a map (`HashMap` or `BTreeMap`) and
19348ignoring either the keys or values."##,
19349        default_severity: Severity::Allow,
19350        warn_since: None,
19351        deny_since: None,
19352    },
19353    Lint {
19354        label: "clippy::iter_next_loop",
19355        description: r##"Checks for loops on `x.next()`."##,
19356        default_severity: Severity::Allow,
19357        warn_since: None,
19358        deny_since: None,
19359    },
19360    Lint {
19361        label: "clippy::iter_next_slice",
19362        description: r##"Checks for usage of `iter().next()` on a Slice or an Array"##,
19363        default_severity: Severity::Allow,
19364        warn_since: None,
19365        deny_since: None,
19366    },
19367    Lint {
19368        label: "clippy::iter_not_returning_iterator",
19369        description: r##"Detects methods named `iter` or `iter_mut` that do not have a return type that implements `Iterator`."##,
19370        default_severity: Severity::Allow,
19371        warn_since: None,
19372        deny_since: None,
19373    },
19374    Lint {
19375        label: "clippy::iter_nth",
19376        description: r##"Checks for usage of `.iter().nth()`/`.iter_mut().nth()` on standard library types that have
19377equivalent `.get()`/`.get_mut()` methods."##,
19378        default_severity: Severity::Allow,
19379        warn_since: None,
19380        deny_since: None,
19381    },
19382    Lint {
19383        label: "clippy::iter_nth_zero",
19384        description: r##"Checks for the use of `iter.nth(0)`."##,
19385        default_severity: Severity::Allow,
19386        warn_since: None,
19387        deny_since: None,
19388    },
19389    Lint {
19390        label: "clippy::iter_on_empty_collections",
19391        description: r##"Checks for calls to `iter`, `iter_mut` or `into_iter` on empty collections"##,
19392        default_severity: Severity::Allow,
19393        warn_since: None,
19394        deny_since: None,
19395    },
19396    Lint {
19397        label: "clippy::iter_on_single_items",
19398        description: r##"Checks for calls to `iter`, `iter_mut` or `into_iter` on collections containing a single item"##,
19399        default_severity: Severity::Allow,
19400        warn_since: None,
19401        deny_since: None,
19402    },
19403    Lint {
19404        label: "clippy::iter_out_of_bounds",
19405        description: r##"Looks for iterator combinator calls such as `.take(x)` or `.skip(x)`
19406where `x` is greater than the amount of items that an iterator will produce."##,
19407        default_severity: Severity::Allow,
19408        warn_since: None,
19409        deny_since: None,
19410    },
19411    Lint {
19412        label: "clippy::iter_over_hash_type",
19413        description: r##"This is a restriction lint which prevents the use of hash types (i.e., `HashSet` and `HashMap`) in for loops."##,
19414        default_severity: Severity::Allow,
19415        warn_since: None,
19416        deny_since: None,
19417    },
19418    Lint {
19419        label: "clippy::iter_overeager_cloned",
19420        description: r##"Checks for usage of `_.cloned().<func>()` where call to `.cloned()` can be postponed."##,
19421        default_severity: Severity::Allow,
19422        warn_since: None,
19423        deny_since: None,
19424    },
19425    Lint {
19426        label: "clippy::iter_skip_next",
19427        description: r##"Checks for usage of `.skip(x).next()` on iterators."##,
19428        default_severity: Severity::Allow,
19429        warn_since: None,
19430        deny_since: None,
19431    },
19432    Lint {
19433        label: "clippy::iter_skip_zero",
19434        description: r##"Checks for usage of `.skip(0)` on iterators."##,
19435        default_severity: Severity::Allow,
19436        warn_since: None,
19437        deny_since: None,
19438    },
19439    Lint {
19440        label: "clippy::iter_with_drain",
19441        description: r##"Checks for usage of `.drain(..)` on `Vec` and `VecDeque` for iteration."##,
19442        default_severity: Severity::Allow,
19443        warn_since: None,
19444        deny_since: None,
19445    },
19446    Lint {
19447        label: "clippy::iter_without_into_iter",
19448        description: r##"Looks for `iter` and `iter_mut` methods without an associated `IntoIterator for (&|&mut) Type` implementation."##,
19449        default_severity: Severity::Allow,
19450        warn_since: None,
19451        deny_since: None,
19452    },
19453    Lint {
19454        label: "clippy::iterator_step_by_zero",
19455        description: r##"Checks for calling `.step_by(0)` on iterators which panics."##,
19456        default_severity: Severity::Allow,
19457        warn_since: None,
19458        deny_since: None,
19459    },
19460    Lint {
19461        label: "clippy::join_absolute_paths",
19462        description: r##"Checks for calls to `Path::join` that start with a path separator (`\\\\` or `/`)."##,
19463        default_severity: Severity::Allow,
19464        warn_since: None,
19465        deny_since: None,
19466    },
19467    Lint {
19468        label: "clippy::just_underscores_and_digits",
19469        description: r##"Checks if you have variables whose name consists of just
19470underscores and digits."##,
19471        default_severity: Severity::Allow,
19472        warn_since: None,
19473        deny_since: None,
19474    },
19475    Lint {
19476        label: "clippy::large_const_arrays",
19477        description: r##"Checks for large `const` arrays that should
19478be defined as `static` instead."##,
19479        default_severity: Severity::Allow,
19480        warn_since: None,
19481        deny_since: None,
19482    },
19483    Lint {
19484        label: "clippy::large_digit_groups",
19485        description: r##"Warns if the digits of an integral or floating-point
19486constant are grouped into groups that
19487are too large."##,
19488        default_severity: Severity::Allow,
19489        warn_since: None,
19490        deny_since: None,
19491    },
19492    Lint {
19493        label: "clippy::large_enum_variant",
19494        description: r##"Checks for large size differences between variants on
19495`enum`s."##,
19496        default_severity: Severity::Allow,
19497        warn_since: None,
19498        deny_since: None,
19499    },
19500    Lint {
19501        label: "clippy::large_futures",
19502        description: r##"It checks for the size of a `Future` created by `async fn` or `async {}`."##,
19503        default_severity: Severity::Allow,
19504        warn_since: None,
19505        deny_since: None,
19506    },
19507    Lint {
19508        label: "clippy::large_include_file",
19509        description: r##"Checks for the inclusion of large files via `include_bytes!()`
19510or `include_str!()`."##,
19511        default_severity: Severity::Allow,
19512        warn_since: None,
19513        deny_since: None,
19514    },
19515    Lint {
19516        label: "clippy::large_stack_arrays",
19517        description: r##"Checks for local arrays that may be too large."##,
19518        default_severity: Severity::Allow,
19519        warn_since: None,
19520        deny_since: None,
19521    },
19522    Lint {
19523        label: "clippy::large_stack_frames",
19524        description: r##"Checks for functions that use a lot of stack space.
19525
19526This often happens when constructing a large type, such as an array with a lot of elements,
19527or constructing *many* smaller-but-still-large structs, or copying around a lot of large types.
19528
19529This lint is a more general version of [`large_stack_arrays`](https://rust-lang.github.io/rust-clippy/master/#large_stack_arrays)
19530that is intended to look at functions as a whole instead of only individual array expressions inside of a function."##,
19531        default_severity: Severity::Allow,
19532        warn_since: None,
19533        deny_since: None,
19534    },
19535    Lint {
19536        label: "clippy::large_types_passed_by_value",
19537        description: r##"Checks for functions taking arguments by value, where
19538the argument type is `Copy` and large enough to be worth considering
19539passing by reference. Does not trigger if the function is being exported,
19540because that might induce API breakage, if the parameter is declared as mutable,
19541or if the argument is a `self`."##,
19542        default_severity: Severity::Allow,
19543        warn_since: None,
19544        deny_since: None,
19545    },
19546    Lint {
19547        label: "clippy::legacy_numeric_constants",
19548        description: r##"Checks for usage of `<integer>::max_value()`, `std::<integer>::MAX`,
19549`std::<float>::EPSILON`, etc."##,
19550        default_severity: Severity::Allow,
19551        warn_since: None,
19552        deny_since: None,
19553    },
19554    Lint {
19555        label: "clippy::len_without_is_empty",
19556        description: r##"Checks for items that implement `.len()` but not
19557`.is_empty()`."##,
19558        default_severity: Severity::Allow,
19559        warn_since: None,
19560        deny_since: None,
19561    },
19562    Lint {
19563        label: "clippy::len_zero",
19564        description: r##"Checks for getting the length of something via `.len()`
19565just to compare to zero, and suggests using `.is_empty()` where applicable."##,
19566        default_severity: Severity::Allow,
19567        warn_since: None,
19568        deny_since: None,
19569    },
19570    Lint {
19571        label: "clippy::let_and_return",
19572        description: r##"Checks for `let`-bindings, which are subsequently
19573returned."##,
19574        default_severity: Severity::Allow,
19575        warn_since: None,
19576        deny_since: None,
19577    },
19578    Lint {
19579        label: "clippy::let_underscore_future",
19580        description: r##"Checks for `let _ = <expr>` where the resulting type of expr implements `Future`"##,
19581        default_severity: Severity::Allow,
19582        warn_since: None,
19583        deny_since: None,
19584    },
19585    Lint {
19586        label: "clippy::let_underscore_lock",
19587        description: r##"Checks for `let _ = sync_lock`. This supports `mutex` and `rwlock` in
19588`parking_lot`. For `std` locks see the `rustc` lint
19589[`let_underscore_lock`](https://doc.rust-lang.org/nightly/rustc/lints/listing/deny-by-default.html#let-underscore-lock)"##,
19590        default_severity: Severity::Allow,
19591        warn_since: None,
19592        deny_since: None,
19593    },
19594    Lint {
19595        label: "clippy::let_underscore_must_use",
19596        description: r##"Checks for `let _ = <expr>` where expr is `#[must_use]`"##,
19597        default_severity: Severity::Allow,
19598        warn_since: None,
19599        deny_since: None,
19600    },
19601    Lint {
19602        label: "clippy::let_underscore_untyped",
19603        description: r##"Checks for `let _ = <expr>` without a type annotation, and suggests to either provide one,
19604or remove the `let` keyword altogether."##,
19605        default_severity: Severity::Allow,
19606        warn_since: None,
19607        deny_since: None,
19608    },
19609    Lint {
19610        label: "clippy::let_unit_value",
19611        description: r##"Checks for binding a unit value."##,
19612        default_severity: Severity::Allow,
19613        warn_since: None,
19614        deny_since: None,
19615    },
19616    Lint {
19617        label: "clippy::let_with_type_underscore",
19618        description: r##"Detects when a variable is declared with an explicit type of `_`."##,
19619        default_severity: Severity::Allow,
19620        warn_since: None,
19621        deny_since: None,
19622    },
19623    Lint {
19624        label: "clippy::lines_filter_map_ok",
19625        description: r##"Checks for usage of `lines.filter_map(Result::ok)` or `lines.flat_map(Result::ok)`
19626when `lines` has type `std::io::Lines`."##,
19627        default_severity: Severity::Allow,
19628        warn_since: None,
19629        deny_since: None,
19630    },
19631    Lint {
19632        label: "clippy::linkedlist",
19633        description: r##"Checks for usage of any `LinkedList`, suggesting to use a
19634`Vec` or a `VecDeque` (formerly called `RingBuf`)."##,
19635        default_severity: Severity::Allow,
19636        warn_since: None,
19637        deny_since: None,
19638    },
19639    Lint {
19640        label: "clippy::lint_groups_priority",
19641        description: r##"Checks for lint groups with the same priority as lints in the `Cargo.toml`
19642[`[lints]` table](https://doc.rust-lang.org/cargo/reference/manifest.html#the-lints-section).
19643
19644This lint will be removed once [cargo#12918](https://github.com/rust-lang/cargo/issues/12918)
19645is resolved."##,
19646        default_severity: Severity::Allow,
19647        warn_since: None,
19648        deny_since: None,
19649    },
19650    Lint {
19651        label: "clippy::little_endian_bytes",
19652        description: r##"Checks for the usage of the `to_le_bytes` method and/or the function `from_le_bytes`."##,
19653        default_severity: Severity::Allow,
19654        warn_since: None,
19655        deny_since: None,
19656    },
19657    Lint {
19658        label: "clippy::lossy_float_literal",
19659        description: r##"Checks for whole number float literals that
19660cannot be represented as the underlying type without loss."##,
19661        default_severity: Severity::Allow,
19662        warn_since: None,
19663        deny_since: None,
19664    },
19665    Lint {
19666        label: "clippy::macro_metavars_in_unsafe",
19667        description: r##"Looks for macros that expand metavariables in an unsafe block."##,
19668        default_severity: Severity::Allow,
19669        warn_since: None,
19670        deny_since: None,
19671    },
19672    Lint {
19673        label: "clippy::macro_use_imports",
19674        description: r##"Checks for `#[macro_use] use...`."##,
19675        default_severity: Severity::Allow,
19676        warn_since: None,
19677        deny_since: None,
19678    },
19679    Lint {
19680        label: "clippy::main_recursion",
19681        description: r##"Checks for recursion using the entrypoint."##,
19682        default_severity: Severity::Allow,
19683        warn_since: None,
19684        deny_since: None,
19685    },
19686    Lint {
19687        label: "clippy::manual_assert",
19688        description: r##"Detects `if`-then-`panic!` that can be replaced with `assert!`."##,
19689        default_severity: Severity::Allow,
19690        warn_since: None,
19691        deny_since: None,
19692    },
19693    Lint {
19694        label: "clippy::manual_async_fn",
19695        description: r##"It checks for manual implementations of `async` functions."##,
19696        default_severity: Severity::Allow,
19697        warn_since: None,
19698        deny_since: None,
19699    },
19700    Lint {
19701        label: "clippy::manual_bits",
19702        description: r##"Checks for usage of `std::mem::size_of::<T>() * 8` when
19703`T::BITS` is available."##,
19704        default_severity: Severity::Allow,
19705        warn_since: None,
19706        deny_since: None,
19707    },
19708    Lint {
19709        label: "clippy::manual_c_str_literals",
19710        description: r##"Checks for the manual creation of C strings (a string with a `NUL` byte at the end), either
19711through one of the `CStr` constructor functions, or more plainly by calling `.as_ptr()`
19712on a (byte) string literal with a hardcoded `\\0` byte at the end."##,
19713        default_severity: Severity::Allow,
19714        warn_since: None,
19715        deny_since: None,
19716    },
19717    Lint {
19718        label: "clippy::manual_clamp",
19719        description: r##"Identifies good opportunities for a clamp function from std or core, and suggests using it."##,
19720        default_severity: Severity::Allow,
19721        warn_since: None,
19722        deny_since: None,
19723    },
19724    Lint {
19725        label: "clippy::manual_div_ceil",
19726        description: r##"Checks for an expression like `(x + (y - 1)) / y` which is a common manual reimplementation
19727of `x.div_ceil(y)`."##,
19728        default_severity: Severity::Allow,
19729        warn_since: None,
19730        deny_since: None,
19731    },
19732    Lint {
19733        label: "clippy::manual_filter",
19734        description: r##"Checks for usage of `match` which could be implemented using `filter`"##,
19735        default_severity: Severity::Allow,
19736        warn_since: None,
19737        deny_since: None,
19738    },
19739    Lint {
19740        label: "clippy::manual_filter_map",
19741        description: r##"Checks for usage of `_.filter(_).map(_)` that can be written more simply
19742as `filter_map(_)`."##,
19743        default_severity: Severity::Allow,
19744        warn_since: None,
19745        deny_since: None,
19746    },
19747    Lint {
19748        label: "clippy::manual_find",
19749        description: r##"Checks for manual implementations of Iterator::find"##,
19750        default_severity: Severity::Allow,
19751        warn_since: None,
19752        deny_since: None,
19753    },
19754    Lint {
19755        label: "clippy::manual_find_map",
19756        description: r##"Checks for usage of `_.find(_).map(_)` that can be written more simply
19757as `find_map(_)`."##,
19758        default_severity: Severity::Allow,
19759        warn_since: None,
19760        deny_since: None,
19761    },
19762    Lint {
19763        label: "clippy::manual_flatten",
19764        description: r##"Checks for unnecessary `if let` usage in a for loop
19765where only the `Some` or `Ok` variant of the iterator element is used."##,
19766        default_severity: Severity::Allow,
19767        warn_since: None,
19768        deny_since: None,
19769    },
19770    Lint {
19771        label: "clippy::manual_hash_one",
19772        description: r##"Checks for cases where [`BuildHasher::hash_one`] can be used.
19773
19774[`BuildHasher::hash_one`]: https://doc.rust-lang.org/std/hash/trait.BuildHasher.html#method.hash_one"##,
19775        default_severity: Severity::Allow,
19776        warn_since: None,
19777        deny_since: None,
19778    },
19779    Lint {
19780        label: "clippy::manual_inspect",
19781        description: r##"Checks for uses of `map` which return the original item."##,
19782        default_severity: Severity::Allow,
19783        warn_since: None,
19784        deny_since: None,
19785    },
19786    Lint {
19787        label: "clippy::manual_instant_elapsed",
19788        description: r##"Lints subtraction between `Instant::now()` and another `Instant`."##,
19789        default_severity: Severity::Allow,
19790        warn_since: None,
19791        deny_since: None,
19792    },
19793    Lint {
19794        label: "clippy::manual_is_ascii_check",
19795        description: r##"Suggests to use dedicated built-in methods,
19796`is_ascii_(lowercase|uppercase|digit|hexdigit)` for checking on corresponding
19797ascii range"##,
19798        default_severity: Severity::Allow,
19799        warn_since: None,
19800        deny_since: None,
19801    },
19802    Lint {
19803        label: "clippy::manual_is_finite",
19804        description: r##"Checks for manual `is_finite` reimplementations
19805(i.e., `x != <float>::INFINITY && x != <float>::NEG_INFINITY`)."##,
19806        default_severity: Severity::Allow,
19807        warn_since: None,
19808        deny_since: None,
19809    },
19810    Lint {
19811        label: "clippy::manual_is_infinite",
19812        description: r##"Checks for manual `is_infinite` reimplementations
19813(i.e., `x == <float>::INFINITY || x == <float>::NEG_INFINITY`)."##,
19814        default_severity: Severity::Allow,
19815        warn_since: None,
19816        deny_since: None,
19817    },
19818    Lint {
19819        label: "clippy::manual_is_power_of_two",
19820        description: r##"Checks for expressions like `x.count_ones() == 1` or `x & (x - 1) == 0`, with x and unsigned integer, which are manual
19821reimplementations of `x.is_power_of_two()`."##,
19822        default_severity: Severity::Allow,
19823        warn_since: None,
19824        deny_since: None,
19825    },
19826    Lint {
19827        label: "clippy::manual_is_variant_and",
19828        description: r##"Checks for usage of `option.map(f).unwrap_or_default()` and `result.map(f).unwrap_or_default()` where f is a function or closure that returns the `bool` type."##,
19829        default_severity: Severity::Allow,
19830        warn_since: None,
19831        deny_since: None,
19832    },
19833    Lint {
19834        label: "clippy::manual_let_else",
19835        description: r##"Warn of cases where `let...else` could be used"##,
19836        default_severity: Severity::Allow,
19837        warn_since: None,
19838        deny_since: None,
19839    },
19840    Lint {
19841        label: "clippy::manual_main_separator_str",
19842        description: r##"Checks for references on `std::path::MAIN_SEPARATOR.to_string()` used
19843to build a `&str`."##,
19844        default_severity: Severity::Allow,
19845        warn_since: None,
19846        deny_since: None,
19847    },
19848    Lint {
19849        label: "clippy::manual_map",
19850        description: r##"Checks for usage of `match` which could be implemented using `map`"##,
19851        default_severity: Severity::Allow,
19852        warn_since: None,
19853        deny_since: None,
19854    },
19855    Lint {
19856        label: "clippy::manual_memcpy",
19857        description: r##"Checks for for-loops that manually copy items between
19858slices that could be optimized by having a memcpy."##,
19859        default_severity: Severity::Allow,
19860        warn_since: None,
19861        deny_since: None,
19862    },
19863    Lint {
19864        label: "clippy::manual_next_back",
19865        description: r##"Checks for `.rev().next()` on a `DoubleEndedIterator`"##,
19866        default_severity: Severity::Allow,
19867        warn_since: None,
19868        deny_since: None,
19869    },
19870    Lint {
19871        label: "clippy::manual_non_exhaustive",
19872        description: r##"Checks for manual implementations of the non-exhaustive pattern."##,
19873        default_severity: Severity::Allow,
19874        warn_since: None,
19875        deny_since: None,
19876    },
19877    Lint {
19878        label: "clippy::manual_ok_or",
19879        description: r##"Finds patterns that reimplement `Option::ok_or`."##,
19880        default_severity: Severity::Allow,
19881        warn_since: None,
19882        deny_since: None,
19883    },
19884    Lint {
19885        label: "clippy::manual_pattern_char_comparison",
19886        description: r##"Checks for manual `char` comparison in string patterns"##,
19887        default_severity: Severity::Allow,
19888        warn_since: None,
19889        deny_since: None,
19890    },
19891    Lint {
19892        label: "clippy::manual_range_contains",
19893        description: r##"Checks for expressions like `x >= 3 && x < 8` that could
19894be more readably expressed as `(3..8).contains(x)`."##,
19895        default_severity: Severity::Allow,
19896        warn_since: None,
19897        deny_since: None,
19898    },
19899    Lint {
19900        label: "clippy::manual_range_patterns",
19901        description: r##"Looks for combined OR patterns that are all contained in a specific range,
19902e.g. `6 | 4 | 5 | 9 | 7 | 8` can be rewritten as `4..=9`."##,
19903        default_severity: Severity::Allow,
19904        warn_since: None,
19905        deny_since: None,
19906    },
19907    Lint {
19908        label: "clippy::manual_rem_euclid",
19909        description: r##"Checks for an expression like `((x % 4) + 4) % 4` which is a common manual reimplementation
19910of `x.rem_euclid(4)`."##,
19911        default_severity: Severity::Allow,
19912        warn_since: None,
19913        deny_since: None,
19914    },
19915    Lint {
19916        label: "clippy::manual_retain",
19917        description: r##"Checks for code to be replaced by `.retain()`."##,
19918        default_severity: Severity::Allow,
19919        warn_since: None,
19920        deny_since: None,
19921    },
19922    Lint {
19923        label: "clippy::manual_rotate",
19924        description: r##"It detects manual bit rotations that could be rewritten using standard
19925functions `rotate_left` or `rotate_right`."##,
19926        default_severity: Severity::Allow,
19927        warn_since: None,
19928        deny_since: None,
19929    },
19930    Lint {
19931        label: "clippy::manual_saturating_arithmetic",
19932        description: r##"Checks for `.checked_add/sub(x).unwrap_or(MAX/MIN)`."##,
19933        default_severity: Severity::Allow,
19934        warn_since: None,
19935        deny_since: None,
19936    },
19937    Lint {
19938        label: "clippy::manual_slice_size_calculation",
19939        description: r##"When `a` is `&[T]`, detect `a.len() * size_of::<T>()` and suggest `size_of_val(a)`
19940instead."##,
19941        default_severity: Severity::Allow,
19942        warn_since: None,
19943        deny_since: None,
19944    },
19945    Lint {
19946        label: "clippy::manual_split_once",
19947        description: r##"Checks for usage of `str::splitn(2, _)`"##,
19948        default_severity: Severity::Allow,
19949        warn_since: None,
19950        deny_since: None,
19951    },
19952    Lint {
19953        label: "clippy::manual_str_repeat",
19954        description: r##"Checks for manual implementations of `str::repeat`"##,
19955        default_severity: Severity::Allow,
19956        warn_since: None,
19957        deny_since: None,
19958    },
19959    Lint {
19960        label: "clippy::manual_string_new",
19961        description: r##"Checks for usage of `` to create a `String`, such as `.to_string()`, `.to_owned()`,
19962`String::from()` and others."##,
19963        default_severity: Severity::Allow,
19964        warn_since: None,
19965        deny_since: None,
19966    },
19967    Lint {
19968        label: "clippy::manual_strip",
19969        description: r##"Suggests using `strip_{prefix,suffix}` over `str::{starts,ends}_with` and slicing using
19970the pattern's length."##,
19971        default_severity: Severity::Allow,
19972        warn_since: None,
19973        deny_since: None,
19974    },
19975    Lint {
19976        label: "clippy::manual_swap",
19977        description: r##"Checks for manual swapping.
19978
19979Note that the lint will not be emitted in const blocks, as the suggestion would not be applicable."##,
19980        default_severity: Severity::Allow,
19981        warn_since: None,
19982        deny_since: None,
19983    },
19984    Lint {
19985        label: "clippy::manual_try_fold",
19986        description: r##"Checks for usage of `Iterator::fold` with a type that implements `Try`."##,
19987        default_severity: Severity::Allow,
19988        warn_since: None,
19989        deny_since: None,
19990    },
19991    Lint {
19992        label: "clippy::manual_unwrap_or",
19993        description: r##"Finds patterns that reimplement `Option::unwrap_or` or `Result::unwrap_or`."##,
19994        default_severity: Severity::Allow,
19995        warn_since: None,
19996        deny_since: None,
19997    },
19998    Lint {
19999        label: "clippy::manual_unwrap_or_default",
20000        description: r##"Checks if a `match` or `if let` expression can be simplified using
20001`.unwrap_or_default()`."##,
20002        default_severity: Severity::Allow,
20003        warn_since: None,
20004        deny_since: None,
20005    },
20006    Lint {
20007        label: "clippy::manual_while_let_some",
20008        description: r##"Looks for loops that check for emptiness of a `Vec` in the condition and pop an element
20009in the body as a separate operation."##,
20010        default_severity: Severity::Allow,
20011        warn_since: None,
20012        deny_since: None,
20013    },
20014    Lint {
20015        label: "clippy::many_single_char_names",
20016        description: r##"Checks for too many variables whose name consists of a
20017single character."##,
20018        default_severity: Severity::Allow,
20019        warn_since: None,
20020        deny_since: None,
20021    },
20022    Lint {
20023        label: "clippy::map_clone",
20024        description: r##"Checks for usage of `map(|x| x.clone())` or
20025dereferencing closures for `Copy` types, on `Iterator` or `Option`,
20026and suggests `cloned()` or `copied()` instead"##,
20027        default_severity: Severity::Allow,
20028        warn_since: None,
20029        deny_since: None,
20030    },
20031    Lint {
20032        label: "clippy::map_collect_result_unit",
20033        description: r##"Checks for usage of `_.map(_).collect::<Result<(), _>()`."##,
20034        default_severity: Severity::Allow,
20035        warn_since: None,
20036        deny_since: None,
20037    },
20038    Lint {
20039        label: "clippy::map_entry",
20040        description: r##"Checks for usage of `contains_key` + `insert` on `HashMap`
20041or `BTreeMap`."##,
20042        default_severity: Severity::Allow,
20043        warn_since: None,
20044        deny_since: None,
20045    },
20046    Lint {
20047        label: "clippy::map_err_ignore",
20048        description: r##"Checks for instances of `map_err(|_| Some::Enum)`"##,
20049        default_severity: Severity::Allow,
20050        warn_since: None,
20051        deny_since: None,
20052    },
20053    Lint {
20054        label: "clippy::map_flatten",
20055        description: r##"Checks for usage of `_.map(_).flatten(_)` on `Iterator` and `Option`"##,
20056        default_severity: Severity::Allow,
20057        warn_since: None,
20058        deny_since: None,
20059    },
20060    Lint {
20061        label: "clippy::map_identity",
20062        description: r##"Checks for instances of `map(f)` where `f` is the identity function."##,
20063        default_severity: Severity::Allow,
20064        warn_since: None,
20065        deny_since: None,
20066    },
20067    Lint {
20068        label: "clippy::map_unwrap_or",
20069        description: r##"Checks for usage of `option.map(_).unwrap_or(_)` or `option.map(_).unwrap_or_else(_)` or
20070`result.map(_).unwrap_or_else(_)`."##,
20071        default_severity: Severity::Allow,
20072        warn_since: None,
20073        deny_since: None,
20074    },
20075    Lint {
20076        label: "clippy::match_as_ref",
20077        description: r##"Checks for match which is used to add a reference to an
20078`Option` value."##,
20079        default_severity: Severity::Allow,
20080        warn_since: None,
20081        deny_since: None,
20082    },
20083    Lint {
20084        label: "clippy::match_bool",
20085        description: r##"Checks for matches where match expression is a `bool`. It
20086suggests to replace the expression with an `if...else` block."##,
20087        default_severity: Severity::Allow,
20088        warn_since: None,
20089        deny_since: None,
20090    },
20091    Lint {
20092        label: "clippy::match_like_matches_macro",
20093        description: r##"Checks for `match`  or `if let` expressions producing a
20094`bool` that could be written using `matches!`"##,
20095        default_severity: Severity::Allow,
20096        warn_since: None,
20097        deny_since: None,
20098    },
20099    Lint {
20100        label: "clippy::match_on_vec_items",
20101        description: r##"Checks for `match vec[idx]` or `match vec[n..m]`."##,
20102        default_severity: Severity::Allow,
20103        warn_since: None,
20104        deny_since: None,
20105    },
20106    Lint {
20107        label: "clippy::match_overlapping_arm",
20108        description: r##"Checks for overlapping match arms."##,
20109        default_severity: Severity::Allow,
20110        warn_since: None,
20111        deny_since: None,
20112    },
20113    Lint {
20114        label: "clippy::match_ref_pats",
20115        description: r##"Checks for matches where all arms match a reference,
20116suggesting to remove the reference and deref the matched expression
20117instead. It also checks for `if let &foo = bar` blocks."##,
20118        default_severity: Severity::Allow,
20119        warn_since: None,
20120        deny_since: None,
20121    },
20122    Lint {
20123        label: "clippy::match_result_ok",
20124        description: r##"Checks for unnecessary `ok()` in `while let`."##,
20125        default_severity: Severity::Allow,
20126        warn_since: None,
20127        deny_since: None,
20128    },
20129    Lint {
20130        label: "clippy::match_same_arms",
20131        description: r##"Checks for `match` with identical arm bodies.
20132
20133Note: Does not lint on wildcards if the `non_exhaustive_omitted_patterns_lint` feature is
20134enabled and disallowed."##,
20135        default_severity: Severity::Allow,
20136        warn_since: None,
20137        deny_since: None,
20138    },
20139    Lint {
20140        label: "clippy::match_single_binding",
20141        description: r##"Checks for useless match that binds to only one value."##,
20142        default_severity: Severity::Allow,
20143        warn_since: None,
20144        deny_since: None,
20145    },
20146    Lint {
20147        label: "clippy::match_str_case_mismatch",
20148        description: r##"Checks for `match` expressions modifying the case of a string with non-compliant arms"##,
20149        default_severity: Severity::Allow,
20150        warn_since: None,
20151        deny_since: None,
20152    },
20153    Lint {
20154        label: "clippy::match_wild_err_arm",
20155        description: r##"Checks for arm which matches all errors with `Err(_)`
20156and take drastic actions like `panic!`."##,
20157        default_severity: Severity::Allow,
20158        warn_since: None,
20159        deny_since: None,
20160    },
20161    Lint {
20162        label: "clippy::match_wildcard_for_single_variants",
20163        description: r##"Checks for wildcard enum matches for a single variant."##,
20164        default_severity: Severity::Allow,
20165        warn_since: None,
20166        deny_since: None,
20167    },
20168    Lint {
20169        label: "clippy::maybe_infinite_iter",
20170        description: r##"Checks for iteration that may be infinite."##,
20171        default_severity: Severity::Allow,
20172        warn_since: None,
20173        deny_since: None,
20174    },
20175    Lint {
20176        label: "clippy::mem_forget",
20177        description: r##"Checks for usage of `std::mem::forget(t)` where `t` is
20178`Drop` or has a field that implements `Drop`."##,
20179        default_severity: Severity::Allow,
20180        warn_since: None,
20181        deny_since: None,
20182    },
20183    Lint {
20184        label: "clippy::mem_replace_option_with_none",
20185        description: r##"Checks for `mem::replace()` on an `Option` with
20186`None`."##,
20187        default_severity: Severity::Allow,
20188        warn_since: None,
20189        deny_since: None,
20190    },
20191    Lint {
20192        label: "clippy::mem_replace_with_default",
20193        description: r##"Checks for `std::mem::replace` on a value of type
20194`T` with `T::default()`."##,
20195        default_severity: Severity::Allow,
20196        warn_since: None,
20197        deny_since: None,
20198    },
20199    Lint {
20200        label: "clippy::mem_replace_with_uninit",
20201        description: r##"Checks for `mem::replace(&mut _, mem::uninitialized())`
20202and `mem::replace(&mut _, mem::zeroed())`."##,
20203        default_severity: Severity::Allow,
20204        warn_since: None,
20205        deny_since: None,
20206    },
20207    Lint {
20208        label: "clippy::min_ident_chars",
20209        description: r##"Checks for identifiers which consist of a single character (or fewer than the configured threshold).
20210
20211Note: This lint can be very noisy when enabled; it may be desirable to only enable it
20212temporarily."##,
20213        default_severity: Severity::Allow,
20214        warn_since: None,
20215        deny_since: None,
20216    },
20217    Lint {
20218        label: "clippy::min_max",
20219        description: r##"Checks for expressions where `std::cmp::min` and `max` are
20220used to clamp values, but switched so that the result is constant."##,
20221        default_severity: Severity::Allow,
20222        warn_since: None,
20223        deny_since: None,
20224    },
20225    Lint {
20226        label: "clippy::misaligned_transmute",
20227        description: r##"Nothing. This lint has been deprecated"##,
20228        default_severity: Severity::Allow,
20229        warn_since: None,
20230        deny_since: None,
20231    },
20232    Lint {
20233        label: "clippy::mismatching_type_param_order",
20234        description: r##"Checks for type parameters which are positioned inconsistently between
20235a type definition and impl block. Specifically, a parameter in an impl
20236block which has the same name as a parameter in the type def, but is in
20237a different place."##,
20238        default_severity: Severity::Allow,
20239        warn_since: None,
20240        deny_since: None,
20241    },
20242    Lint {
20243        label: "clippy::misnamed_getters",
20244        description: r##"Checks for getter methods that return a field that doesn't correspond
20245to the name of the method, when there is a field's whose name matches that of the method."##,
20246        default_severity: Severity::Allow,
20247        warn_since: None,
20248        deny_since: None,
20249    },
20250    Lint {
20251        label: "clippy::misrefactored_assign_op",
20252        description: r##"Checks for `a op= a op b` or `a op= b op a` patterns."##,
20253        default_severity: Severity::Allow,
20254        warn_since: None,
20255        deny_since: None,
20256    },
20257    Lint {
20258        label: "clippy::missing_assert_message",
20259        description: r##"Checks assertions without a custom panic message."##,
20260        default_severity: Severity::Allow,
20261        warn_since: None,
20262        deny_since: None,
20263    },
20264    Lint {
20265        label: "clippy::missing_asserts_for_indexing",
20266        description: r##"Checks for repeated slice indexing without asserting beforehand that the length
20267is greater than the largest index used to index into the slice."##,
20268        default_severity: Severity::Allow,
20269        warn_since: None,
20270        deny_since: None,
20271    },
20272    Lint {
20273        label: "clippy::missing_const_for_fn",
20274        description: r##"Suggests the use of `const` in functions and methods where possible."##,
20275        default_severity: Severity::Allow,
20276        warn_since: None,
20277        deny_since: None,
20278    },
20279    Lint {
20280        label: "clippy::missing_const_for_thread_local",
20281        description: r##"Suggests to use `const` in `thread_local!` macro if possible."##,
20282        default_severity: Severity::Allow,
20283        warn_since: None,
20284        deny_since: None,
20285    },
20286    Lint {
20287        label: "clippy::missing_docs_in_private_items",
20288        description: r##"Warns if there is missing documentation for any private documentable item."##,
20289        default_severity: Severity::Allow,
20290        warn_since: None,
20291        deny_since: None,
20292    },
20293    Lint {
20294        label: "clippy::missing_enforced_import_renames",
20295        description: r##"Checks for imports that do not rename the item as specified
20296in the `enforced-import-renames` config option.
20297
20298Note: Even though this lint is warn-by-default, it will only trigger if
20299import renames are defined in the `clippy.toml` file."##,
20300        default_severity: Severity::Allow,
20301        warn_since: None,
20302        deny_since: None,
20303    },
20304    Lint {
20305        label: "clippy::missing_errors_doc",
20306        description: r##"Checks the doc comments of publicly visible functions that
20307return a `Result` type and warns if there is no `# Errors` section."##,
20308        default_severity: Severity::Allow,
20309        warn_since: None,
20310        deny_since: None,
20311    },
20312    Lint {
20313        label: "clippy::missing_fields_in_debug",
20314        description: r##"Checks for manual [`core::fmt::Debug`](https://doc.rust-lang.org/core/fmt/trait.Debug.html) implementations that do not use all fields."##,
20315        default_severity: Severity::Allow,
20316        warn_since: None,
20317        deny_since: None,
20318    },
20319    Lint {
20320        label: "clippy::missing_inline_in_public_items",
20321        description: r##"It lints if an exported function, method, trait method with default impl,
20322or trait method impl is not `#[inline]`."##,
20323        default_severity: Severity::Allow,
20324        warn_since: None,
20325        deny_since: None,
20326    },
20327    Lint {
20328        label: "clippy::missing_panics_doc",
20329        description: r##"Checks the doc comments of publicly visible functions that
20330may panic and warns if there is no `# Panics` section."##,
20331        default_severity: Severity::Allow,
20332        warn_since: None,
20333        deny_since: None,
20334    },
20335    Lint {
20336        label: "clippy::missing_safety_doc",
20337        description: r##"Checks for the doc comments of publicly visible
20338unsafe functions and warns if there is no `# Safety` section."##,
20339        default_severity: Severity::Allow,
20340        warn_since: None,
20341        deny_since: None,
20342    },
20343    Lint {
20344        label: "clippy::missing_spin_loop",
20345        description: r##"Checks for empty spin loops"##,
20346        default_severity: Severity::Allow,
20347        warn_since: None,
20348        deny_since: None,
20349    },
20350    Lint {
20351        label: "clippy::missing_trait_methods",
20352        description: r##"Checks if a provided method is used implicitly by a trait
20353implementation."##,
20354        default_severity: Severity::Allow,
20355        warn_since: None,
20356        deny_since: None,
20357    },
20358    Lint {
20359        label: "clippy::missing_transmute_annotations",
20360        description: r##"Checks if transmute calls have all generics specified."##,
20361        default_severity: Severity::Allow,
20362        warn_since: None,
20363        deny_since: None,
20364    },
20365    Lint {
20366        label: "clippy::mistyped_literal_suffixes",
20367        description: r##"Warns for mistyped suffix in literals"##,
20368        default_severity: Severity::Allow,
20369        warn_since: None,
20370        deny_since: None,
20371    },
20372    Lint {
20373        label: "clippy::mixed_attributes_style",
20374        description: r##"Checks for items that have the same kind of attributes with mixed styles (inner/outer)."##,
20375        default_severity: Severity::Allow,
20376        warn_since: None,
20377        deny_since: None,
20378    },
20379    Lint {
20380        label: "clippy::mixed_case_hex_literals",
20381        description: r##"Warns on hexadecimal literals with mixed-case letter
20382digits."##,
20383        default_severity: Severity::Allow,
20384        warn_since: None,
20385        deny_since: None,
20386    },
20387    Lint {
20388        label: "clippy::mixed_read_write_in_expression",
20389        description: r##"Checks for a read and a write to the same variable where
20390whether the read occurs before or after the write depends on the evaluation
20391order of sub-expressions."##,
20392        default_severity: Severity::Allow,
20393        warn_since: None,
20394        deny_since: None,
20395    },
20396    Lint {
20397        label: "clippy::mod_module_files",
20398        description: r##"Checks that module layout uses only self named module files; bans `mod.rs` files."##,
20399        default_severity: Severity::Allow,
20400        warn_since: None,
20401        deny_since: None,
20402    },
20403    Lint {
20404        label: "clippy::module_inception",
20405        description: r##"Checks for modules that have the same name as their
20406parent module"##,
20407        default_severity: Severity::Allow,
20408        warn_since: None,
20409        deny_since: None,
20410    },
20411    Lint {
20412        label: "clippy::module_name_repetitions",
20413        description: r##"Detects type names that are prefixed or suffixed by the
20414containing module's name."##,
20415        default_severity: Severity::Allow,
20416        warn_since: None,
20417        deny_since: None,
20418    },
20419    Lint {
20420        label: "clippy::modulo_arithmetic",
20421        description: r##"Checks for modulo arithmetic."##,
20422        default_severity: Severity::Allow,
20423        warn_since: None,
20424        deny_since: None,
20425    },
20426    Lint {
20427        label: "clippy::modulo_one",
20428        description: r##"Checks for getting the remainder of integer division by one or minus
20429one."##,
20430        default_severity: Severity::Allow,
20431        warn_since: None,
20432        deny_since: None,
20433    },
20434    Lint {
20435        label: "clippy::multi_assignments",
20436        description: r##"Checks for nested assignments."##,
20437        default_severity: Severity::Allow,
20438        warn_since: None,
20439        deny_since: None,
20440    },
20441    Lint {
20442        label: "clippy::multiple_bound_locations",
20443        description: r##"Check if a generic is defined both in the bound predicate and in the `where` clause."##,
20444        default_severity: Severity::Allow,
20445        warn_since: None,
20446        deny_since: None,
20447    },
20448    Lint {
20449        label: "clippy::multiple_crate_versions",
20450        description: r##"Checks to see if multiple versions of a crate are being
20451used."##,
20452        default_severity: Severity::Allow,
20453        warn_since: None,
20454        deny_since: None,
20455    },
20456    Lint {
20457        label: "clippy::multiple_inherent_impl",
20458        description: r##"Checks for multiple inherent implementations of a struct"##,
20459        default_severity: Severity::Allow,
20460        warn_since: None,
20461        deny_since: None,
20462    },
20463    Lint {
20464        label: "clippy::multiple_unsafe_ops_per_block",
20465        description: r##"Checks for `unsafe` blocks that contain more than one unsafe operation."##,
20466        default_severity: Severity::Allow,
20467        warn_since: None,
20468        deny_since: None,
20469    },
20470    Lint {
20471        label: "clippy::must_use_candidate",
20472        description: r##"Checks for public functions that have no
20473`#[must_use]` attribute, but return something not already marked
20474must-use, have no mutable arg and mutate no statics."##,
20475        default_severity: Severity::Allow,
20476        warn_since: None,
20477        deny_since: None,
20478    },
20479    Lint {
20480        label: "clippy::must_use_unit",
20481        description: r##"Checks for a `#[must_use]` attribute on
20482unit-returning functions and methods."##,
20483        default_severity: Severity::Allow,
20484        warn_since: None,
20485        deny_since: None,
20486    },
20487    Lint {
20488        label: "clippy::mut_from_ref",
20489        description: r##"This lint checks for functions that take immutable references and return
20490mutable ones. This will not trigger if no unsafe code exists as there
20491are multiple safe functions which will do this transformation
20492
20493To be on the conservative side, if there's at least one mutable
20494reference with the output lifetime, this lint will not trigger."##,
20495        default_severity: Severity::Allow,
20496        warn_since: None,
20497        deny_since: None,
20498    },
20499    Lint {
20500        label: "clippy::mut_mut",
20501        description: r##"Checks for instances of `mut mut` references."##,
20502        default_severity: Severity::Allow,
20503        warn_since: None,
20504        deny_since: None,
20505    },
20506    Lint {
20507        label: "clippy::mut_mutex_lock",
20508        description: r##"Checks for `&mut Mutex::lock` calls"##,
20509        default_severity: Severity::Allow,
20510        warn_since: None,
20511        deny_since: None,
20512    },
20513    Lint {
20514        label: "clippy::mut_range_bound",
20515        description: r##"Checks for loops with a range bound that is a mutable variable."##,
20516        default_severity: Severity::Allow,
20517        warn_since: None,
20518        deny_since: None,
20519    },
20520    Lint {
20521        label: "clippy::mutable_key_type",
20522        description: r##"Checks for sets/maps with mutable key types."##,
20523        default_severity: Severity::Allow,
20524        warn_since: None,
20525        deny_since: None,
20526    },
20527    Lint {
20528        label: "clippy::mutex_atomic",
20529        description: r##"Checks for usage of `Mutex<X>` where an atomic will do."##,
20530        default_severity: Severity::Allow,
20531        warn_since: None,
20532        deny_since: None,
20533    },
20534    Lint {
20535        label: "clippy::mutex_integer",
20536        description: r##"Checks for usage of `Mutex<X>` where `X` is an integral
20537type."##,
20538        default_severity: Severity::Allow,
20539        warn_since: None,
20540        deny_since: None,
20541    },
20542    Lint {
20543        label: "clippy::naive_bytecount",
20544        description: r##"Checks for naive byte counts"##,
20545        default_severity: Severity::Allow,
20546        warn_since: None,
20547        deny_since: None,
20548    },
20549    Lint {
20550        label: "clippy::needless_arbitrary_self_type",
20551        description: r##"The lint checks for `self` in fn parameters that
20552specify the `Self`-type explicitly"##,
20553        default_severity: Severity::Allow,
20554        warn_since: None,
20555        deny_since: None,
20556    },
20557    Lint {
20558        label: "clippy::needless_bitwise_bool",
20559        description: r##"Checks for usage of bitwise and/or operators between booleans, where performance may be improved by using
20560a lazy and."##,
20561        default_severity: Severity::Allow,
20562        warn_since: None,
20563        deny_since: None,
20564    },
20565    Lint {
20566        label: "clippy::needless_bool",
20567        description: r##"Checks for expressions of the form `if c { true } else {
20568false }` (or vice versa) and suggests using the condition directly."##,
20569        default_severity: Severity::Allow,
20570        warn_since: None,
20571        deny_since: None,
20572    },
20573    Lint {
20574        label: "clippy::needless_bool_assign",
20575        description: r##"Checks for expressions of the form `if c { x = true } else { x = false }`
20576(or vice versa) and suggest assigning the variable directly from the
20577condition."##,
20578        default_severity: Severity::Allow,
20579        warn_since: None,
20580        deny_since: None,
20581    },
20582    Lint {
20583        label: "clippy::needless_borrow",
20584        description: r##"Checks for address of operations (`&`) that are going to
20585be dereferenced immediately by the compiler."##,
20586        default_severity: Severity::Allow,
20587        warn_since: None,
20588        deny_since: None,
20589    },
20590    Lint {
20591        label: "clippy::needless_borrowed_reference",
20592        description: r##"Checks for bindings that needlessly destructure a reference and borrow the inner
20593value with `&ref`."##,
20594        default_severity: Severity::Allow,
20595        warn_since: None,
20596        deny_since: None,
20597    },
20598    Lint {
20599        label: "clippy::needless_borrows_for_generic_args",
20600        description: r##"Checks for borrow operations (`&`) that are used as a generic argument to a
20601function when the borrowed value could be used."##,
20602        default_severity: Severity::Allow,
20603        warn_since: None,
20604        deny_since: None,
20605    },
20606    Lint {
20607        label: "clippy::needless_character_iteration",
20608        description: r##"Checks if an iterator is used to check if a string is ascii."##,
20609        default_severity: Severity::Allow,
20610        warn_since: None,
20611        deny_since: None,
20612    },
20613    Lint {
20614        label: "clippy::needless_collect",
20615        description: r##"Checks for functions collecting an iterator when collect
20616is not needed."##,
20617        default_severity: Severity::Allow,
20618        warn_since: None,
20619        deny_since: None,
20620    },
20621    Lint {
20622        label: "clippy::needless_continue",
20623        description: r##"The lint checks for `if`-statements appearing in loops
20624that contain a `continue` statement in either their main blocks or their
20625`else`-blocks, when omitting the `else`-block possibly with some
20626rearrangement of code can make the code easier to understand."##,
20627        default_severity: Severity::Allow,
20628        warn_since: None,
20629        deny_since: None,
20630    },
20631    Lint {
20632        label: "clippy::needless_doctest_main",
20633        description: r##"Checks for `fn main() { .. }` in doctests"##,
20634        default_severity: Severity::Allow,
20635        warn_since: None,
20636        deny_since: None,
20637    },
20638    Lint {
20639        label: "clippy::needless_else",
20640        description: r##"Checks for empty `else` branches."##,
20641        default_severity: Severity::Allow,
20642        warn_since: None,
20643        deny_since: None,
20644    },
20645    Lint {
20646        label: "clippy::needless_for_each",
20647        description: r##"Checks for usage of `for_each` that would be more simply written as a
20648`for` loop."##,
20649        default_severity: Severity::Allow,
20650        warn_since: None,
20651        deny_since: None,
20652    },
20653    Lint {
20654        label: "clippy::needless_if",
20655        description: r##"Checks for empty `if` branches with no else branch."##,
20656        default_severity: Severity::Allow,
20657        warn_since: None,
20658        deny_since: None,
20659    },
20660    Lint {
20661        label: "clippy::needless_late_init",
20662        description: r##"Checks for late initializations that can be replaced by a `let` statement
20663with an initializer."##,
20664        default_severity: Severity::Allow,
20665        warn_since: None,
20666        deny_since: None,
20667    },
20668    Lint {
20669        label: "clippy::needless_lifetimes",
20670        description: r##"Checks for lifetime annotations which can be removed by
20671relying on lifetime elision."##,
20672        default_severity: Severity::Allow,
20673        warn_since: None,
20674        deny_since: None,
20675    },
20676    Lint {
20677        label: "clippy::needless_match",
20678        description: r##"Checks for unnecessary `match` or match-like `if let` returns for `Option` and `Result`
20679when function signatures are the same."##,
20680        default_severity: Severity::Allow,
20681        warn_since: None,
20682        deny_since: None,
20683    },
20684    Lint {
20685        label: "clippy::needless_maybe_sized",
20686        description: r##"Lints `?Sized` bounds applied to type parameters that cannot be unsized"##,
20687        default_severity: Severity::Allow,
20688        warn_since: None,
20689        deny_since: None,
20690    },
20691    Lint {
20692        label: "clippy::needless_option_as_deref",
20693        description: r##"Checks for no-op uses of `Option::{as_deref, as_deref_mut}`,
20694for example, `Option<&T>::as_deref()` returns the same type."##,
20695        default_severity: Severity::Allow,
20696        warn_since: None,
20697        deny_since: None,
20698    },
20699    Lint {
20700        label: "clippy::needless_option_take",
20701        description: r##"Checks for calling `take` function after `as_ref`."##,
20702        default_severity: Severity::Allow,
20703        warn_since: None,
20704        deny_since: None,
20705    },
20706    Lint {
20707        label: "clippy::needless_parens_on_range_literals",
20708        description: r##"The lint checks for parenthesis on literals in range statements that are
20709superfluous."##,
20710        default_severity: Severity::Allow,
20711        warn_since: None,
20712        deny_since: None,
20713    },
20714    Lint {
20715        label: "clippy::needless_pass_by_ref_mut",
20716        description: r##"Check if a `&mut` function argument is actually used mutably.
20717
20718Be careful if the function is publicly reexported as it would break compatibility with
20719users of this function, when the users pass this function as an argument."##,
20720        default_severity: Severity::Allow,
20721        warn_since: None,
20722        deny_since: None,
20723    },
20724    Lint {
20725        label: "clippy::needless_pass_by_value",
20726        description: r##"Checks for functions taking arguments by value, but not
20727consuming them in its
20728body."##,
20729        default_severity: Severity::Allow,
20730        warn_since: None,
20731        deny_since: None,
20732    },
20733    Lint {
20734        label: "clippy::needless_pub_self",
20735        description: r##"Checks for usage of `pub(self)` and `pub(in self)`."##,
20736        default_severity: Severity::Allow,
20737        warn_since: None,
20738        deny_since: None,
20739    },
20740    Lint {
20741        label: "clippy::needless_question_mark",
20742        description: r##"Suggests alternatives for useless applications of `?` in terminating expressions"##,
20743        default_severity: Severity::Allow,
20744        warn_since: None,
20745        deny_since: None,
20746    },
20747    Lint {
20748        label: "clippy::needless_range_loop",
20749        description: r##"Checks for looping over the range of `0..len` of some
20750collection just to get the values by index."##,
20751        default_severity: Severity::Allow,
20752        warn_since: None,
20753        deny_since: None,
20754    },
20755    Lint {
20756        label: "clippy::needless_raw_string_hashes",
20757        description: r##"Checks for raw string literals with an unnecessary amount of hashes around them."##,
20758        default_severity: Severity::Allow,
20759        warn_since: None,
20760        deny_since: None,
20761    },
20762    Lint {
20763        label: "clippy::needless_raw_strings",
20764        description: r##"Checks for raw string literals where a string literal can be used instead."##,
20765        default_severity: Severity::Allow,
20766        warn_since: None,
20767        deny_since: None,
20768    },
20769    Lint {
20770        label: "clippy::needless_return",
20771        description: r##"Checks for return statements at the end of a block."##,
20772        default_severity: Severity::Allow,
20773        warn_since: None,
20774        deny_since: None,
20775    },
20776    Lint {
20777        label: "clippy::needless_return_with_question_mark",
20778        description: r##"Checks for return statements on `Err` paired with the `?` operator."##,
20779        default_severity: Severity::Allow,
20780        warn_since: None,
20781        deny_since: None,
20782    },
20783    Lint {
20784        label: "clippy::needless_splitn",
20785        description: r##"Checks for usage of `str::splitn` (or `str::rsplitn`) where using `str::split` would be the same."##,
20786        default_severity: Severity::Allow,
20787        warn_since: None,
20788        deny_since: None,
20789    },
20790    Lint {
20791        label: "clippy::needless_update",
20792        description: r##"Checks for needlessly including a base struct on update
20793when all fields are changed anyway.
20794
20795This lint is not applied to structs marked with
20796[non_exhaustive](https://doc.rust-lang.org/reference/attributes/type_system.html)."##,
20797        default_severity: Severity::Allow,
20798        warn_since: None,
20799        deny_since: None,
20800    },
20801    Lint {
20802        label: "clippy::neg_cmp_op_on_partial_ord",
20803        description: r##"Checks for the usage of negated comparison operators on types which only implement
20804`PartialOrd` (e.g., `f64`)."##,
20805        default_severity: Severity::Allow,
20806        warn_since: None,
20807        deny_since: None,
20808    },
20809    Lint {
20810        label: "clippy::neg_multiply",
20811        description: r##"Checks for multiplication by -1 as a form of negation."##,
20812        default_severity: Severity::Allow,
20813        warn_since: None,
20814        deny_since: None,
20815    },
20816    Lint {
20817        label: "clippy::negative_feature_names",
20818        description: r##"Checks for negative feature names with prefix `no-` or `not-`"##,
20819        default_severity: Severity::Allow,
20820        warn_since: None,
20821        deny_since: None,
20822    },
20823    Lint {
20824        label: "clippy::never_loop",
20825        description: r##"Checks for loops that will always `break`, `return` or
20826`continue` an outer loop."##,
20827        default_severity: Severity::Allow,
20828        warn_since: None,
20829        deny_since: None,
20830    },
20831    Lint {
20832        label: "clippy::new_ret_no_self",
20833        description: r##"Checks for `new` not returning a type that contains `Self`."##,
20834        default_severity: Severity::Allow,
20835        warn_since: None,
20836        deny_since: None,
20837    },
20838    Lint {
20839        label: "clippy::new_without_default",
20840        description: r##"Checks for public types with a `pub fn new() -> Self` method and no
20841implementation of
20842[`Default`](https://doc.rust-lang.org/std/default/trait.Default.html)."##,
20843        default_severity: Severity::Allow,
20844        warn_since: None,
20845        deny_since: None,
20846    },
20847    Lint {
20848        label: "clippy::no_effect",
20849        description: r##"Checks for statements which have no effect."##,
20850        default_severity: Severity::Allow,
20851        warn_since: None,
20852        deny_since: None,
20853    },
20854    Lint {
20855        label: "clippy::no_effect_replace",
20856        description: r##"Checks for `replace` statements which have no effect."##,
20857        default_severity: Severity::Allow,
20858        warn_since: None,
20859        deny_since: None,
20860    },
20861    Lint {
20862        label: "clippy::no_effect_underscore_binding",
20863        description: r##"Checks for binding to underscore prefixed variable without side-effects."##,
20864        default_severity: Severity::Allow,
20865        warn_since: None,
20866        deny_since: None,
20867    },
20868    Lint {
20869        label: "clippy::no_mangle_with_rust_abi",
20870        description: r##"Checks for Rust ABI functions with the `#[no_mangle]` attribute."##,
20871        default_severity: Severity::Allow,
20872        warn_since: None,
20873        deny_since: None,
20874    },
20875    Lint {
20876        label: "clippy::non_ascii_literal",
20877        description: r##"Checks for non-ASCII characters in string and char literals."##,
20878        default_severity: Severity::Allow,
20879        warn_since: None,
20880        deny_since: None,
20881    },
20882    Lint {
20883        label: "clippy::non_canonical_clone_impl",
20884        description: r##"Checks for non-canonical implementations of `Clone` when `Copy` is already implemented."##,
20885        default_severity: Severity::Allow,
20886        warn_since: None,
20887        deny_since: None,
20888    },
20889    Lint {
20890        label: "clippy::non_canonical_partial_ord_impl",
20891        description: r##"Checks for non-canonical implementations of `PartialOrd` when `Ord` is already implemented."##,
20892        default_severity: Severity::Allow,
20893        warn_since: None,
20894        deny_since: None,
20895    },
20896    Lint {
20897        label: "clippy::non_minimal_cfg",
20898        description: r##"Checks for `any` and `all` combinators in `cfg` with only one condition."##,
20899        default_severity: Severity::Allow,
20900        warn_since: None,
20901        deny_since: None,
20902    },
20903    Lint {
20904        label: "clippy::non_octal_unix_permissions",
20905        description: r##"Checks for non-octal values used to set Unix file permissions."##,
20906        default_severity: Severity::Allow,
20907        warn_since: None,
20908        deny_since: None,
20909    },
20910    Lint {
20911        label: "clippy::non_send_fields_in_send_ty",
20912        description: r##"This lint warns about a `Send` implementation for a type that
20913contains fields that are not safe to be sent across threads.
20914It tries to detect fields that can cause a soundness issue
20915when sent to another thread (e.g., `Rc`) while allowing `!Send` fields
20916that are expected to exist in a `Send` type, such as raw pointers."##,
20917        default_severity: Severity::Allow,
20918        warn_since: None,
20919        deny_since: None,
20920    },
20921    Lint {
20922        label: "clippy::non_zero_suggestions",
20923        description: r##"Checks for conversions from `NonZero` types to regular integer types,
20924and suggests using `NonZero` types for the target as well."##,
20925        default_severity: Severity::Allow,
20926        warn_since: None,
20927        deny_since: None,
20928    },
20929    Lint {
20930        label: "clippy::nonminimal_bool",
20931        description: r##"Checks for boolean expressions that can be written more
20932concisely."##,
20933        default_severity: Severity::Allow,
20934        warn_since: None,
20935        deny_since: None,
20936    },
20937    Lint {
20938        label: "clippy::nonsensical_open_options",
20939        description: r##"Checks for duplicate open options as well as combinations
20940that make no sense."##,
20941        default_severity: Severity::Allow,
20942        warn_since: None,
20943        deny_since: None,
20944    },
20945    Lint {
20946        label: "clippy::nonstandard_macro_braces",
20947        description: r##"Checks that common macros are used with consistent bracing."##,
20948        default_severity: Severity::Allow,
20949        warn_since: None,
20950        deny_since: None,
20951    },
20952    Lint {
20953        label: "clippy::not_unsafe_ptr_arg_deref",
20954        description: r##"Checks for public functions that dereference raw pointer
20955arguments but are not marked `unsafe`."##,
20956        default_severity: Severity::Allow,
20957        warn_since: None,
20958        deny_since: None,
20959    },
20960    Lint {
20961        label: "clippy::obfuscated_if_else",
20962        description: r##"Checks for usage of `.then_some(..).unwrap_or(..)`"##,
20963        default_severity: Severity::Allow,
20964        warn_since: None,
20965        deny_since: None,
20966    },
20967    Lint {
20968        label: "clippy::octal_escapes",
20969        description: r##"Checks for `\\0` escapes in string and byte literals that look like octal
20970character escapes in C."##,
20971        default_severity: Severity::Allow,
20972        warn_since: None,
20973        deny_since: None,
20974    },
20975    Lint {
20976        label: "clippy::ok_expect",
20977        description: r##"Checks for usage of `ok().expect(..)`."##,
20978        default_severity: Severity::Allow,
20979        warn_since: None,
20980        deny_since: None,
20981    },
20982    Lint {
20983        label: "clippy::only_used_in_recursion",
20984        description: r##"Checks for arguments that are only used in recursion with no side-effects."##,
20985        default_severity: Severity::Allow,
20986        warn_since: None,
20987        deny_since: None,
20988    },
20989    Lint {
20990        label: "clippy::op_ref",
20991        description: r##"Checks for arguments to `==` which have their address
20992taken to satisfy a bound
20993and suggests to dereference the other argument instead"##,
20994        default_severity: Severity::Allow,
20995        warn_since: None,
20996        deny_since: None,
20997    },
20998    Lint {
20999        label: "clippy::option_as_ref_cloned",
21000        description: r##"Checks for usage of `.as_ref().cloned()` and `.as_mut().cloned()` on `Option`s"##,
21001        default_severity: Severity::Allow,
21002        warn_since: None,
21003        deny_since: None,
21004    },
21005    Lint {
21006        label: "clippy::option_as_ref_deref",
21007        description: r##"Checks for usage of `_.as_ref().map(Deref::deref)` or its aliases (such as String::as_str)."##,
21008        default_severity: Severity::Allow,
21009        warn_since: None,
21010        deny_since: None,
21011    },
21012    Lint {
21013        label: "clippy::option_env_unwrap",
21014        description: r##"Checks for usage of `option_env!(...).unwrap()` and
21015suggests usage of the `env!` macro."##,
21016        default_severity: Severity::Allow,
21017        warn_since: None,
21018        deny_since: None,
21019    },
21020    Lint {
21021        label: "clippy::option_filter_map",
21022        description: r##"Checks for iterators of `Option`s using `.filter(Option::is_some).map(Option::unwrap)` that may
21023be replaced with a `.flatten()` call."##,
21024        default_severity: Severity::Allow,
21025        warn_since: None,
21026        deny_since: None,
21027    },
21028    Lint {
21029        label: "clippy::option_if_let_else",
21030        description: r##"Lints usage of `if let Some(v) = ... { y } else { x }` and
21031`match .. { Some(v) => y, None/_ => x }` which are more
21032idiomatically done with `Option::map_or` (if the else bit is a pure
21033expression) or `Option::map_or_else` (if the else bit is an impure
21034expression)."##,
21035        default_severity: Severity::Allow,
21036        warn_since: None,
21037        deny_since: None,
21038    },
21039    Lint {
21040        label: "clippy::option_map_or_err_ok",
21041        description: r##"Checks for usage of `_.map_or(Err(_), Ok)`."##,
21042        default_severity: Severity::Allow,
21043        warn_since: None,
21044        deny_since: None,
21045    },
21046    Lint {
21047        label: "clippy::option_map_or_none",
21048        description: r##"Checks for usage of `_.map_or(None, _)`."##,
21049        default_severity: Severity::Allow,
21050        warn_since: None,
21051        deny_since: None,
21052    },
21053    Lint {
21054        label: "clippy::option_map_unit_fn",
21055        description: r##"Checks for usage of `option.map(f)` where f is a function
21056or closure that returns the unit type `()`."##,
21057        default_severity: Severity::Allow,
21058        warn_since: None,
21059        deny_since: None,
21060    },
21061    Lint {
21062        label: "clippy::option_option",
21063        description: r##"Checks for usage of `Option<Option<_>>` in function signatures and type
21064definitions"##,
21065        default_severity: Severity::Allow,
21066        warn_since: None,
21067        deny_since: None,
21068    },
21069    Lint {
21070        label: "clippy::or_fun_call",
21071        description: r##"Checks for calls to `.or(foo(..))`, `.unwrap_or(foo(..))`,
21072`.or_insert(foo(..))` etc., and suggests to use `.or_else(|| foo(..))`,
21073`.unwrap_or_else(|| foo(..))`, `.unwrap_or_default()` or `.or_default()`
21074etc. instead."##,
21075        default_severity: Severity::Allow,
21076        warn_since: None,
21077        deny_since: None,
21078    },
21079    Lint {
21080        label: "clippy::or_then_unwrap",
21081        description: r##"Checks for `.or(…).unwrap()` calls to Options and Results."##,
21082        default_severity: Severity::Allow,
21083        warn_since: None,
21084        deny_since: None,
21085    },
21086    Lint {
21087        label: "clippy::out_of_bounds_indexing",
21088        description: r##"Checks for out of bounds array indexing with a constant
21089index."##,
21090        default_severity: Severity::Allow,
21091        warn_since: None,
21092        deny_since: None,
21093    },
21094    Lint {
21095        label: "clippy::overly_complex_bool_expr",
21096        description: r##"Checks for boolean expressions that contain terminals that
21097can be eliminated."##,
21098        default_severity: Severity::Allow,
21099        warn_since: None,
21100        deny_since: None,
21101    },
21102    Lint {
21103        label: "clippy::panic",
21104        description: r##"Checks for usage of `panic!`."##,
21105        default_severity: Severity::Allow,
21106        warn_since: None,
21107        deny_since: None,
21108    },
21109    Lint {
21110        label: "clippy::panic_in_result_fn",
21111        description: r##"Checks for usage of `panic!` or assertions in a function whose return type is `Result`."##,
21112        default_severity: Severity::Allow,
21113        warn_since: None,
21114        deny_since: None,
21115    },
21116    Lint {
21117        label: "clippy::panicking_overflow_checks",
21118        description: r##"Detects C-style underflow/overflow checks."##,
21119        default_severity: Severity::Allow,
21120        warn_since: None,
21121        deny_since: None,
21122    },
21123    Lint {
21124        label: "clippy::panicking_unwrap",
21125        description: r##"Checks for calls of `unwrap[_err]()` that will always fail."##,
21126        default_severity: Severity::Allow,
21127        warn_since: None,
21128        deny_since: None,
21129    },
21130    Lint {
21131        label: "clippy::partial_pub_fields",
21132        description: r##"Checks whether some but not all fields of a `struct` are public.
21133
21134Either make all fields of a type public, or make none of them public"##,
21135        default_severity: Severity::Allow,
21136        warn_since: None,
21137        deny_since: None,
21138    },
21139    Lint {
21140        label: "clippy::partialeq_ne_impl",
21141        description: r##"Checks for manual re-implementations of `PartialEq::ne`."##,
21142        default_severity: Severity::Allow,
21143        warn_since: None,
21144        deny_since: None,
21145    },
21146    Lint {
21147        label: "clippy::partialeq_to_none",
21148        description: r##"Checks for binary comparisons to a literal `Option::None`."##,
21149        default_severity: Severity::Allow,
21150        warn_since: None,
21151        deny_since: None,
21152    },
21153    Lint {
21154        label: "clippy::path_buf_push_overwrite",
21155        description: r##"* Checks for [push](https://doc.rust-lang.org/std/path/struct.PathBuf.html#method.push)
21156calls on `PathBuf` that can cause overwrites."##,
21157        default_severity: Severity::Allow,
21158        warn_since: None,
21159        deny_since: None,
21160    },
21161    Lint {
21162        label: "clippy::path_ends_with_ext",
21163        description: r##"Looks for calls to `Path::ends_with` calls where the argument looks like a file extension.
21164
21165By default, Clippy has a short list of known filenames that start with a dot
21166but aren't necessarily file extensions (e.g. the `.git` folder), which are allowed by default.
21167The `allowed-dotfiles` configuration can be used to allow additional
21168file extensions that Clippy should not lint."##,
21169        default_severity: Severity::Allow,
21170        warn_since: None,
21171        deny_since: None,
21172    },
21173    Lint {
21174        label: "clippy::pathbuf_init_then_push",
21175        description: r##"Checks for calls to `push` immediately after creating a new `PathBuf`."##,
21176        default_severity: Severity::Allow,
21177        warn_since: None,
21178        deny_since: None,
21179    },
21180    Lint {
21181        label: "clippy::pattern_type_mismatch",
21182        description: r##"Checks for patterns that aren't exact representations of the types
21183they are applied to.
21184
21185To satisfy this lint, you will have to adjust either the expression that is matched
21186against or the pattern itself, as well as the bindings that are introduced by the
21187adjusted patterns. For matching you will have to either dereference the expression
21188with the `*` operator, or amend the patterns to explicitly match against `&<pattern>`
21189or `&mut <pattern>` depending on the reference mutability. For the bindings you need
21190to use the inverse. You can leave them as plain bindings if you wish for the value
21191to be copied, but you must use `ref mut <variable>` or `ref <variable>` to construct
21192a reference into the matched structure.
21193
21194If you are looking for a way to learn about ownership semantics in more detail, it
21195is recommended to look at IDE options available to you to highlight types, lifetimes
21196and reference semantics in your code. The available tooling would expose these things
21197in a general way even outside of the various pattern matching mechanics. Of course
21198this lint can still be used to highlight areas of interest and ensure a good understanding
21199of ownership semantics."##,
21200        default_severity: Severity::Allow,
21201        warn_since: None,
21202        deny_since: None,
21203    },
21204    Lint {
21205        label: "clippy::permissions_set_readonly_false",
21206        description: r##"Checks for calls to `std::fs::Permissions.set_readonly` with argument `false`."##,
21207        default_severity: Severity::Allow,
21208        warn_since: None,
21209        deny_since: None,
21210    },
21211    Lint {
21212        label: "clippy::pointers_in_nomem_asm_block",
21213        description: r##"Checks if any pointer is being passed to an asm! block with `nomem` option."##,
21214        default_severity: Severity::Allow,
21215        warn_since: None,
21216        deny_since: None,
21217    },
21218    Lint {
21219        label: "clippy::possible_missing_comma",
21220        description: r##"Checks for possible missing comma in an array. It lints if
21221an array element is a binary operator expression and it lies on two lines."##,
21222        default_severity: Severity::Allow,
21223        warn_since: None,
21224        deny_since: None,
21225    },
21226    Lint {
21227        label: "clippy::precedence",
21228        description: r##"Checks for operations where precedence may be unclear
21229and suggests to add parentheses. Currently it catches the following:
21230* mixed usage of arithmetic and bit shifting/combining operators without
21231parentheses"##,
21232        default_severity: Severity::Allow,
21233        warn_since: None,
21234        deny_since: None,
21235    },
21236    Lint {
21237        label: "clippy::print_in_format_impl",
21238        description: r##"Checks for usage of `println`, `print`, `eprintln` or `eprint` in an
21239implementation of a formatting trait."##,
21240        default_severity: Severity::Allow,
21241        warn_since: None,
21242        deny_since: None,
21243    },
21244    Lint {
21245        label: "clippy::print_literal",
21246        description: r##"This lint warns about the use of literals as `print!`/`println!` args."##,
21247        default_severity: Severity::Allow,
21248        warn_since: None,
21249        deny_since: None,
21250    },
21251    Lint {
21252        label: "clippy::print_stderr",
21253        description: r##"Checks for printing on *stderr*. The purpose of this lint
21254is to catch debugging remnants."##,
21255        default_severity: Severity::Allow,
21256        warn_since: None,
21257        deny_since: None,
21258    },
21259    Lint {
21260        label: "clippy::print_stdout",
21261        description: r##"Checks for printing on *stdout*. The purpose of this lint
21262is to catch debugging remnants."##,
21263        default_severity: Severity::Allow,
21264        warn_since: None,
21265        deny_since: None,
21266    },
21267    Lint {
21268        label: "clippy::print_with_newline",
21269        description: r##"This lint warns when you use `print!()` with a format
21270string that ends in a newline."##,
21271        default_severity: Severity::Allow,
21272        warn_since: None,
21273        deny_since: None,
21274    },
21275    Lint {
21276        label: "clippy::println_empty_string",
21277        description: r##"This lint warns when you use `println!()` to
21278print a newline."##,
21279        default_severity: Severity::Allow,
21280        warn_since: None,
21281        deny_since: None,
21282    },
21283    Lint {
21284        label: "clippy::ptr_arg",
21285        description: r##"This lint checks for function arguments of type `&String`, `&Vec`,
21286`&PathBuf`, and `Cow<_>`. It will also suggest you replace `.clone()` calls
21287with the appropriate `.to_owned()`/`to_string()` calls."##,
21288        default_severity: Severity::Allow,
21289        warn_since: None,
21290        deny_since: None,
21291    },
21292    Lint {
21293        label: "clippy::ptr_as_ptr",
21294        description: r##"Checks for `as` casts between raw pointers that don't change their
21295constness, namely `*const T` to `*const U` and `*mut T` to `*mut U`."##,
21296        default_severity: Severity::Allow,
21297        warn_since: None,
21298        deny_since: None,
21299    },
21300    Lint {
21301        label: "clippy::ptr_cast_constness",
21302        description: r##"Checks for `as` casts between raw pointers that change their constness, namely `*const T` to
21303`*mut T` and `*mut T` to `*const T`."##,
21304        default_severity: Severity::Allow,
21305        warn_since: None,
21306        deny_since: None,
21307    },
21308    Lint {
21309        label: "clippy::ptr_eq",
21310        description: r##"Use `std::ptr::eq` when applicable"##,
21311        default_severity: Severity::Allow,
21312        warn_since: None,
21313        deny_since: None,
21314    },
21315    Lint {
21316        label: "clippy::ptr_offset_with_cast",
21317        description: r##"Checks for usage of the `offset` pointer method with a `usize` casted to an
21318`isize`."##,
21319        default_severity: Severity::Allow,
21320        warn_since: None,
21321        deny_since: None,
21322    },
21323    Lint {
21324        label: "clippy::pub_enum_variant_names",
21325        description: r##"Nothing. This lint has been deprecated"##,
21326        default_severity: Severity::Allow,
21327        warn_since: None,
21328        deny_since: None,
21329    },
21330    Lint {
21331        label: "clippy::pub_underscore_fields",
21332        description: r##"Checks whether any field of the struct is prefixed with an `_` (underscore) and also marked
21333`pub` (public)"##,
21334        default_severity: Severity::Allow,
21335        warn_since: None,
21336        deny_since: None,
21337    },
21338    Lint {
21339        label: "clippy::pub_use",
21340        description: r##"Restricts the usage of `pub use ...`"##,
21341        default_severity: Severity::Allow,
21342        warn_since: None,
21343        deny_since: None,
21344    },
21345    Lint {
21346        label: "clippy::pub_with_shorthand",
21347        description: r##"Checks for usage of `pub(<loc>)` with `in`."##,
21348        default_severity: Severity::Allow,
21349        warn_since: None,
21350        deny_since: None,
21351    },
21352    Lint {
21353        label: "clippy::pub_without_shorthand",
21354        description: r##"Checks for usage of `pub(<loc>)` without `in`.
21355
21356Note: As you cannot write a module's path in `pub(<loc>)`, this will only trigger on
21357`pub(super)` and the like."##,
21358        default_severity: Severity::Allow,
21359        warn_since: None,
21360        deny_since: None,
21361    },
21362    Lint {
21363        label: "clippy::question_mark",
21364        description: r##"Checks for expressions that could be replaced by the question mark operator."##,
21365        default_severity: Severity::Allow,
21366        warn_since: None,
21367        deny_since: None,
21368    },
21369    Lint {
21370        label: "clippy::question_mark_used",
21371        description: r##"Checks for expressions that use the question mark operator and rejects them."##,
21372        default_severity: Severity::Allow,
21373        warn_since: None,
21374        deny_since: None,
21375    },
21376    Lint {
21377        label: "clippy::range_minus_one",
21378        description: r##"Checks for inclusive ranges where 1 is subtracted from
21379the upper bound, e.g., `x..=(y-1)`."##,
21380        default_severity: Severity::Allow,
21381        warn_since: None,
21382        deny_since: None,
21383    },
21384    Lint {
21385        label: "clippy::range_plus_one",
21386        description: r##"Checks for exclusive ranges where 1 is added to the
21387upper bound, e.g., `x..(y+1)`."##,
21388        default_severity: Severity::Allow,
21389        warn_since: None,
21390        deny_since: None,
21391    },
21392    Lint {
21393        label: "clippy::range_step_by_zero",
21394        description: r##"Nothing. This lint has been deprecated"##,
21395        default_severity: Severity::Allow,
21396        warn_since: None,
21397        deny_since: None,
21398    },
21399    Lint {
21400        label: "clippy::range_zip_with_len",
21401        description: r##"Checks for zipping a collection with the range of
21402`0.._.len()`."##,
21403        default_severity: Severity::Allow,
21404        warn_since: None,
21405        deny_since: None,
21406    },
21407    Lint {
21408        label: "clippy::rc_buffer",
21409        description: r##"Checks for `Rc<T>` and `Arc<T>` when `T` is a mutable buffer type such as `String` or `Vec`."##,
21410        default_severity: Severity::Allow,
21411        warn_since: None,
21412        deny_since: None,
21413    },
21414    Lint {
21415        label: "clippy::rc_clone_in_vec_init",
21416        description: r##"Checks for reference-counted pointers (`Arc`, `Rc`, `rc::Weak`, and `sync::Weak`)
21417in `vec![elem; len]`"##,
21418        default_severity: Severity::Allow,
21419        warn_since: None,
21420        deny_since: None,
21421    },
21422    Lint {
21423        label: "clippy::rc_mutex",
21424        description: r##"Checks for `Rc<Mutex<T>>`."##,
21425        default_severity: Severity::Allow,
21426        warn_since: None,
21427        deny_since: None,
21428    },
21429    Lint {
21430        label: "clippy::read_line_without_trim",
21431        description: r##"Looks for calls to [`Stdin::read_line`] to read a line from the standard input
21432into a string, then later attempting to use that string for an operation that will never
21433work for strings with a trailing newline character in it (e.g. parsing into a `i32`)."##,
21434        default_severity: Severity::Allow,
21435        warn_since: None,
21436        deny_since: None,
21437    },
21438    Lint {
21439        label: "clippy::read_zero_byte_vec",
21440        description: r##"This lint catches reads into a zero-length `Vec`.
21441Especially in the case of a call to `with_capacity`, this lint warns that read
21442gets the number of bytes from the `Vec`'s length, not its capacity."##,
21443        default_severity: Severity::Allow,
21444        warn_since: None,
21445        deny_since: None,
21446    },
21447    Lint {
21448        label: "clippy::readonly_write_lock",
21449        description: r##"Looks for calls to `RwLock::write` where the lock is only used for reading."##,
21450        default_severity: Severity::Allow,
21451        warn_since: None,
21452        deny_since: None,
21453    },
21454    Lint {
21455        label: "clippy::recursive_format_impl",
21456        description: r##"Checks for format trait implementations (e.g. `Display`) with a recursive call to itself
21457which uses `self` as a parameter.
21458This is typically done indirectly with the `write!` macro or with `to_string()`."##,
21459        default_severity: Severity::Allow,
21460        warn_since: None,
21461        deny_since: None,
21462    },
21463    Lint {
21464        label: "clippy::redundant_allocation",
21465        description: r##"Checks for usage of redundant allocations anywhere in the code."##,
21466        default_severity: Severity::Allow,
21467        warn_since: None,
21468        deny_since: None,
21469    },
21470    Lint {
21471        label: "clippy::redundant_as_str",
21472        description: r##"Checks for usage of `as_str()` on a `String` chained with a method available on the `String` itself."##,
21473        default_severity: Severity::Allow,
21474        warn_since: None,
21475        deny_since: None,
21476    },
21477    Lint {
21478        label: "clippy::redundant_async_block",
21479        description: r##"Checks for `async` block that only returns `await` on a future."##,
21480        default_severity: Severity::Allow,
21481        warn_since: None,
21482        deny_since: None,
21483    },
21484    Lint {
21485        label: "clippy::redundant_at_rest_pattern",
21486        description: r##"Checks for `[all @ ..]` patterns."##,
21487        default_severity: Severity::Allow,
21488        warn_since: None,
21489        deny_since: None,
21490    },
21491    Lint {
21492        label: "clippy::redundant_clone",
21493        description: r##"Checks for a redundant `clone()` (and its relatives) which clones an owned
21494value that is going to be dropped without further use."##,
21495        default_severity: Severity::Allow,
21496        warn_since: None,
21497        deny_since: None,
21498    },
21499    Lint {
21500        label: "clippy::redundant_closure",
21501        description: r##"Checks for closures which just call another function where
21502the function can be called directly. `unsafe` functions, calls where types
21503get adjusted or where the callee is marked `#[track_caller]` are ignored."##,
21504        default_severity: Severity::Allow,
21505        warn_since: None,
21506        deny_since: None,
21507    },
21508    Lint {
21509        label: "clippy::redundant_closure_call",
21510        description: r##"Detects closures called in the same expression where they
21511are defined."##,
21512        default_severity: Severity::Allow,
21513        warn_since: None,
21514        deny_since: None,
21515    },
21516    Lint {
21517        label: "clippy::redundant_closure_for_method_calls",
21518        description: r##"Checks for closures which only invoke a method on the closure
21519argument and can be replaced by referencing the method directly."##,
21520        default_severity: Severity::Allow,
21521        warn_since: None,
21522        deny_since: None,
21523    },
21524    Lint {
21525        label: "clippy::redundant_comparisons",
21526        description: r##"Checks for ineffective double comparisons against constants."##,
21527        default_severity: Severity::Allow,
21528        warn_since: None,
21529        deny_since: None,
21530    },
21531    Lint {
21532        label: "clippy::redundant_else",
21533        description: r##"Checks for `else` blocks that can be removed without changing semantics."##,
21534        default_severity: Severity::Allow,
21535        warn_since: None,
21536        deny_since: None,
21537    },
21538    Lint {
21539        label: "clippy::redundant_feature_names",
21540        description: r##"Checks for feature names with prefix `use-`, `with-` or suffix `-support`"##,
21541        default_severity: Severity::Allow,
21542        warn_since: None,
21543        deny_since: None,
21544    },
21545    Lint {
21546        label: "clippy::redundant_field_names",
21547        description: r##"Checks for fields in struct literals where shorthands
21548could be used."##,
21549        default_severity: Severity::Allow,
21550        warn_since: None,
21551        deny_since: None,
21552    },
21553    Lint {
21554        label: "clippy::redundant_guards",
21555        description: r##"Checks for unnecessary guards in match expressions."##,
21556        default_severity: Severity::Allow,
21557        warn_since: None,
21558        deny_since: None,
21559    },
21560    Lint {
21561        label: "clippy::redundant_locals",
21562        description: r##"Checks for redundant redefinitions of local bindings."##,
21563        default_severity: Severity::Allow,
21564        warn_since: None,
21565        deny_since: None,
21566    },
21567    Lint {
21568        label: "clippy::redundant_pattern",
21569        description: r##"Checks for patterns in the form `name @ _`."##,
21570        default_severity: Severity::Allow,
21571        warn_since: None,
21572        deny_since: None,
21573    },
21574    Lint {
21575        label: "clippy::redundant_pattern_matching",
21576        description: r##"Lint for redundant pattern matching over `Result`, `Option`,
21577`std::task::Poll`, `std::net::IpAddr` or `bool`s"##,
21578        default_severity: Severity::Allow,
21579        warn_since: None,
21580        deny_since: None,
21581    },
21582    Lint {
21583        label: "clippy::redundant_pub_crate",
21584        description: r##"Checks for items declared `pub(crate)` that are not crate visible because they
21585are inside a private module."##,
21586        default_severity: Severity::Allow,
21587        warn_since: None,
21588        deny_since: None,
21589    },
21590    Lint {
21591        label: "clippy::redundant_slicing",
21592        description: r##"Checks for redundant slicing expressions which use the full range, and
21593do not change the type."##,
21594        default_severity: Severity::Allow,
21595        warn_since: None,
21596        deny_since: None,
21597    },
21598    Lint {
21599        label: "clippy::redundant_static_lifetimes",
21600        description: r##"Checks for constants and statics with an explicit `'static` lifetime."##,
21601        default_severity: Severity::Allow,
21602        warn_since: None,
21603        deny_since: None,
21604    },
21605    Lint {
21606        label: "clippy::redundant_type_annotations",
21607        description: r##"Warns about needless / redundant type annotations."##,
21608        default_severity: Severity::Allow,
21609        warn_since: None,
21610        deny_since: None,
21611    },
21612    Lint {
21613        label: "clippy::ref_as_ptr",
21614        description: r##"Checks for casts of references to pointer using `as`
21615and suggests `std::ptr::from_ref` and `std::ptr::from_mut` instead."##,
21616        default_severity: Severity::Allow,
21617        warn_since: None,
21618        deny_since: None,
21619    },
21620    Lint {
21621        label: "clippy::ref_binding_to_reference",
21622        description: r##"Checks for `ref` bindings which create a reference to a reference."##,
21623        default_severity: Severity::Allow,
21624        warn_since: None,
21625        deny_since: None,
21626    },
21627    Lint {
21628        label: "clippy::ref_option",
21629        description: r##"Warns when a function signature uses `&Option<T>` instead of `Option<&T>`."##,
21630        default_severity: Severity::Allow,
21631        warn_since: None,
21632        deny_since: None,
21633    },
21634    Lint {
21635        label: "clippy::ref_option_ref",
21636        description: r##"Checks for usage of `&Option<&T>`."##,
21637        default_severity: Severity::Allow,
21638        warn_since: None,
21639        deny_since: None,
21640    },
21641    Lint {
21642        label: "clippy::ref_patterns",
21643        description: r##"Checks for usages of the `ref` keyword."##,
21644        default_severity: Severity::Allow,
21645        warn_since: None,
21646        deny_since: None,
21647    },
21648    Lint {
21649        label: "clippy::regex_macro",
21650        description: r##"Nothing. This lint has been deprecated"##,
21651        default_severity: Severity::Allow,
21652        warn_since: None,
21653        deny_since: None,
21654    },
21655    Lint {
21656        label: "clippy::renamed_function_params",
21657        description: r##"Lints when the name of function parameters from trait impl is
21658different than its default implementation."##,
21659        default_severity: Severity::Allow,
21660        warn_since: None,
21661        deny_since: None,
21662    },
21663    Lint {
21664        label: "clippy::repeat_once",
21665        description: r##"Checks for usage of `.repeat(1)` and suggest the following method for each types.
21666- `.to_string()` for `str`
21667- `.clone()` for `String`
21668- `.to_vec()` for `slice`
21669
21670The lint will evaluate constant expressions and values as arguments of `.repeat(..)` and emit a message if
21671they are equivalent to `1`. (Related discussion in [rust-clippy#7306](https://github.com/rust-lang/rust-clippy/issues/7306))"##,
21672        default_severity: Severity::Allow,
21673        warn_since: None,
21674        deny_since: None,
21675    },
21676    Lint {
21677        label: "clippy::repeat_vec_with_capacity",
21678        description: r##"Looks for patterns such as `vec![Vec::with_capacity(x); n]` or `iter::repeat(Vec::with_capacity(x))`."##,
21679        default_severity: Severity::Allow,
21680        warn_since: None,
21681        deny_since: None,
21682    },
21683    Lint {
21684        label: "clippy::replace_consts",
21685        description: r##"Nothing. This lint has been deprecated"##,
21686        default_severity: Severity::Allow,
21687        warn_since: None,
21688        deny_since: None,
21689    },
21690    Lint {
21691        label: "clippy::reserve_after_initialization",
21692        description: r##"Informs the user about a more concise way to create a vector with a known capacity."##,
21693        default_severity: Severity::Allow,
21694        warn_since: None,
21695        deny_since: None,
21696    },
21697    Lint {
21698        label: "clippy::rest_pat_in_fully_bound_structs",
21699        description: r##"Checks for unnecessary '..' pattern binding on struct when all fields are explicitly matched."##,
21700        default_severity: Severity::Allow,
21701        warn_since: None,
21702        deny_since: None,
21703    },
21704    Lint {
21705        label: "clippy::result_filter_map",
21706        description: r##"Checks for iterators of `Result`s using `.filter(Result::is_ok).map(Result::unwrap)` that may
21707be replaced with a `.flatten()` call."##,
21708        default_severity: Severity::Allow,
21709        warn_since: None,
21710        deny_since: None,
21711    },
21712    Lint {
21713        label: "clippy::result_large_err",
21714        description: r##"Checks for functions that return `Result` with an unusually large
21715`Err`-variant."##,
21716        default_severity: Severity::Allow,
21717        warn_since: None,
21718        deny_since: None,
21719    },
21720    Lint {
21721        label: "clippy::result_map_or_into_option",
21722        description: r##"Checks for usage of `_.map_or(None, Some)`."##,
21723        default_severity: Severity::Allow,
21724        warn_since: None,
21725        deny_since: None,
21726    },
21727    Lint {
21728        label: "clippy::result_map_unit_fn",
21729        description: r##"Checks for usage of `result.map(f)` where f is a function
21730or closure that returns the unit type `()`."##,
21731        default_severity: Severity::Allow,
21732        warn_since: None,
21733        deny_since: None,
21734    },
21735    Lint {
21736        label: "clippy::result_unit_err",
21737        description: r##"Checks for public functions that return a `Result`
21738with an `Err` type of `()`. It suggests using a custom type that
21739implements `std::error::Error`."##,
21740        default_severity: Severity::Allow,
21741        warn_since: None,
21742        deny_since: None,
21743    },
21744    Lint {
21745        label: "clippy::return_self_not_must_use",
21746        description: r##"This lint warns when a method returning `Self` doesn't have the `#[must_use]` attribute."##,
21747        default_severity: Severity::Allow,
21748        warn_since: None,
21749        deny_since: None,
21750    },
21751    Lint {
21752        label: "clippy::reversed_empty_ranges",
21753        description: r##"Checks for range expressions `x..y` where both `x` and `y`
21754are constant and `x` is greater to `y`. Also triggers if `x` is equal to `y` when they are conditions to a `for` loop."##,
21755        default_severity: Severity::Allow,
21756        warn_since: None,
21757        deny_since: None,
21758    },
21759    Lint {
21760        label: "clippy::same_functions_in_if_condition",
21761        description: r##"Checks for consecutive `if`s with the same function call."##,
21762        default_severity: Severity::Allow,
21763        warn_since: None,
21764        deny_since: None,
21765    },
21766    Lint {
21767        label: "clippy::same_item_push",
21768        description: r##"Checks whether a for loop is being used to push a constant
21769value into a Vec."##,
21770        default_severity: Severity::Allow,
21771        warn_since: None,
21772        deny_since: None,
21773    },
21774    Lint {
21775        label: "clippy::same_name_method",
21776        description: r##"It lints if a struct has two methods with the same name:
21777one from a trait, another not from a trait."##,
21778        default_severity: Severity::Allow,
21779        warn_since: None,
21780        deny_since: None,
21781    },
21782    Lint {
21783        label: "clippy::search_is_some",
21784        description: r##"Checks for an iterator or string search (such as `find()`,
21785`position()`, or `rposition()`) followed by a call to `is_some()` or `is_none()`."##,
21786        default_severity: Severity::Allow,
21787        warn_since: None,
21788        deny_since: None,
21789    },
21790    Lint {
21791        label: "clippy::seek_from_current",
21792        description: r##"Checks if the `seek` method of the `Seek` trait is called with `SeekFrom::Current(0)`,
21793and if it is, suggests using `stream_position` instead."##,
21794        default_severity: Severity::Allow,
21795        warn_since: None,
21796        deny_since: None,
21797    },
21798    Lint {
21799        label: "clippy::seek_to_start_instead_of_rewind",
21800        description: r##"Checks for jumps to the start of a stream that implements `Seek`
21801and uses the `seek` method providing `Start` as parameter."##,
21802        default_severity: Severity::Allow,
21803        warn_since: None,
21804        deny_since: None,
21805    },
21806    Lint {
21807        label: "clippy::self_assignment",
21808        description: r##"Checks for explicit self-assignments."##,
21809        default_severity: Severity::Allow,
21810        warn_since: None,
21811        deny_since: None,
21812    },
21813    Lint {
21814        label: "clippy::self_named_constructors",
21815        description: r##"Warns when constructors have the same name as their types."##,
21816        default_severity: Severity::Allow,
21817        warn_since: None,
21818        deny_since: None,
21819    },
21820    Lint {
21821        label: "clippy::self_named_module_files",
21822        description: r##"Checks that module layout uses only `mod.rs` files."##,
21823        default_severity: Severity::Allow,
21824        warn_since: None,
21825        deny_since: None,
21826    },
21827    Lint {
21828        label: "clippy::semicolon_if_nothing_returned",
21829        description: r##"Looks for blocks of expressions and fires if the last expression returns
21830`()` but is not followed by a semicolon."##,
21831        default_severity: Severity::Allow,
21832        warn_since: None,
21833        deny_since: None,
21834    },
21835    Lint {
21836        label: "clippy::semicolon_inside_block",
21837        description: r##"Suggests moving the semicolon after a block to the inside of the block, after its last
21838expression."##,
21839        default_severity: Severity::Allow,
21840        warn_since: None,
21841        deny_since: None,
21842    },
21843    Lint {
21844        label: "clippy::semicolon_outside_block",
21845        description: r##"Suggests moving the semicolon from a block's final expression outside of the block."##,
21846        default_severity: Severity::Allow,
21847        warn_since: None,
21848        deny_since: None,
21849    },
21850    Lint {
21851        label: "clippy::separated_literal_suffix",
21852        description: r##"Warns if literal suffixes are separated by an underscore.
21853To enforce separated literal suffix style,
21854see the `unseparated_literal_suffix` lint."##,
21855        default_severity: Severity::Allow,
21856        warn_since: None,
21857        deny_since: None,
21858    },
21859    Lint {
21860        label: "clippy::serde_api_misuse",
21861        description: r##"Checks for misuses of the serde API."##,
21862        default_severity: Severity::Allow,
21863        warn_since: None,
21864        deny_since: None,
21865    },
21866    Lint {
21867        label: "clippy::set_contains_or_insert",
21868        description: r##"Checks for usage of `contains` to see if a value is not present
21869in a set like `HashSet` or `BTreeSet`, followed by an `insert`."##,
21870        default_severity: Severity::Allow,
21871        warn_since: None,
21872        deny_since: None,
21873    },
21874    Lint {
21875        label: "clippy::shadow_reuse",
21876        description: r##"Checks for bindings that shadow other bindings already in
21877scope, while reusing the original value."##,
21878        default_severity: Severity::Allow,
21879        warn_since: None,
21880        deny_since: None,
21881    },
21882    Lint {
21883        label: "clippy::shadow_same",
21884        description: r##"Checks for bindings that shadow other bindings already in
21885scope, while just changing reference level or mutability."##,
21886        default_severity: Severity::Allow,
21887        warn_since: None,
21888        deny_since: None,
21889    },
21890    Lint {
21891        label: "clippy::shadow_unrelated",
21892        description: r##"Checks for bindings that shadow other bindings already in
21893scope, either without an initialization or with one that does not even use
21894the original value."##,
21895        default_severity: Severity::Allow,
21896        warn_since: None,
21897        deny_since: None,
21898    },
21899    Lint {
21900        label: "clippy::short_circuit_statement",
21901        description: r##"Checks for the use of short circuit boolean conditions as
21902a
21903statement."##,
21904        default_severity: Severity::Allow,
21905        warn_since: None,
21906        deny_since: None,
21907    },
21908    Lint {
21909        label: "clippy::should_assert_eq",
21910        description: r##"Nothing. This lint has been deprecated"##,
21911        default_severity: Severity::Allow,
21912        warn_since: None,
21913        deny_since: None,
21914    },
21915    Lint {
21916        label: "clippy::should_implement_trait",
21917        description: r##"Checks for methods that should live in a trait
21918implementation of a `std` trait (see [llogiq's blog
21919post](http://llogiq.github.io/2015/07/30/traits.html) for further
21920information) instead of an inherent implementation."##,
21921        default_severity: Severity::Allow,
21922        warn_since: None,
21923        deny_since: None,
21924    },
21925    Lint {
21926        label: "clippy::should_panic_without_expect",
21927        description: r##"Checks for `#[should_panic]` attributes without specifying the expected panic message."##,
21928        default_severity: Severity::Allow,
21929        warn_since: None,
21930        deny_since: None,
21931    },
21932    Lint {
21933        label: "clippy::significant_drop_in_scrutinee",
21934        description: r##"Checks for temporaries returned from function calls in a match scrutinee that have the
21935`clippy::has_significant_drop` attribute."##,
21936        default_severity: Severity::Allow,
21937        warn_since: None,
21938        deny_since: None,
21939    },
21940    Lint {
21941        label: "clippy::significant_drop_tightening",
21942        description: r##"Searches for elements marked with `#[clippy::has_significant_drop]` that could be early
21943dropped but are in fact dropped at the end of their scopes. In other words, enforces the
21944tightening of their possible lifetimes."##,
21945        default_severity: Severity::Allow,
21946        warn_since: None,
21947        deny_since: None,
21948    },
21949    Lint {
21950        label: "clippy::similar_names",
21951        description: r##"Checks for names that are very similar and thus confusing.
21952
21953Note: this lint looks for similar names throughout each
21954scope. To allow it, you need to allow it on the scope
21955level, not on the name that is reported."##,
21956        default_severity: Severity::Allow,
21957        warn_since: None,
21958        deny_since: None,
21959    },
21960    Lint {
21961        label: "clippy::single_call_fn",
21962        description: r##"Checks for functions that are only used once. Does not lint tests."##,
21963        default_severity: Severity::Allow,
21964        warn_since: None,
21965        deny_since: None,
21966    },
21967    Lint {
21968        label: "clippy::single_char_add_str",
21969        description: r##"Warns when using `push_str`/`insert_str` with a single-character string literal
21970where `push`/`insert` with a `char` would work fine."##,
21971        default_severity: Severity::Allow,
21972        warn_since: None,
21973        deny_since: None,
21974    },
21975    Lint {
21976        label: "clippy::single_char_lifetime_names",
21977        description: r##"Checks for lifetimes with names which are one character
21978long."##,
21979        default_severity: Severity::Allow,
21980        warn_since: None,
21981        deny_since: None,
21982    },
21983    Lint {
21984        label: "clippy::single_char_pattern",
21985        description: r##"Checks for string methods that receive a single-character
21986`str` as an argument, e.g., `_.split(x)`."##,
21987        default_severity: Severity::Allow,
21988        warn_since: None,
21989        deny_since: None,
21990    },
21991    Lint {
21992        label: "clippy::single_component_path_imports",
21993        description: r##"Checking for imports with single component use path."##,
21994        default_severity: Severity::Allow,
21995        warn_since: None,
21996        deny_since: None,
21997    },
21998    Lint {
21999        label: "clippy::single_element_loop",
22000        description: r##"Checks whether a for loop has a single element."##,
22001        default_severity: Severity::Allow,
22002        warn_since: None,
22003        deny_since: None,
22004    },
22005    Lint {
22006        label: "clippy::single_match",
22007        description: r##"Checks for matches with a single arm where an `if let`
22008will usually suffice.
22009
22010This intentionally does not lint if there are comments
22011inside of the other arm, so as to allow the user to document
22012why having another explicit pattern with an empty body is necessary,
22013or because the comments need to be preserved for other reasons."##,
22014        default_severity: Severity::Allow,
22015        warn_since: None,
22016        deny_since: None,
22017    },
22018    Lint {
22019        label: "clippy::single_match_else",
22020        description: r##"Checks for matches with two arms where an `if let else` will
22021usually suffice."##,
22022        default_severity: Severity::Allow,
22023        warn_since: None,
22024        deny_since: None,
22025    },
22026    Lint {
22027        label: "clippy::single_range_in_vec_init",
22028        description: r##"Checks for `Vec` or array initializations that contain only one range."##,
22029        default_severity: Severity::Allow,
22030        warn_since: None,
22031        deny_since: None,
22032    },
22033    Lint {
22034        label: "clippy::size_of_in_element_count",
22035        description: r##"Detects expressions where
22036`size_of::<T>` or `size_of_val::<T>` is used as a
22037count of elements of type `T`"##,
22038        default_severity: Severity::Allow,
22039        warn_since: None,
22040        deny_since: None,
22041    },
22042    Lint {
22043        label: "clippy::size_of_ref",
22044        description: r##"Checks for calls to `std::mem::size_of_val()` where the argument is
22045a reference to a reference."##,
22046        default_severity: Severity::Allow,
22047        warn_since: None,
22048        deny_since: None,
22049    },
22050    Lint {
22051        label: "clippy::skip_while_next",
22052        description: r##"Checks for usage of `_.skip_while(condition).next()`."##,
22053        default_severity: Severity::Allow,
22054        warn_since: None,
22055        deny_since: None,
22056    },
22057    Lint {
22058        label: "clippy::slow_vector_initialization",
22059        description: r##"Checks slow zero-filled vector initialization"##,
22060        default_severity: Severity::Allow,
22061        warn_since: None,
22062        deny_since: None,
22063    },
22064    Lint {
22065        label: "clippy::stable_sort_primitive",
22066        description: r##"When sorting primitive values (integers, bools, chars, as well
22067as arrays, slices, and tuples of such items), it is typically better to
22068use an unstable sort than a stable sort."##,
22069        default_severity: Severity::Allow,
22070        warn_since: None,
22071        deny_since: None,
22072    },
22073    Lint {
22074        label: "clippy::std_instead_of_alloc",
22075        description: r##"Finds items imported through `std` when available through `alloc`."##,
22076        default_severity: Severity::Allow,
22077        warn_since: None,
22078        deny_since: None,
22079    },
22080    Lint {
22081        label: "clippy::std_instead_of_core",
22082        description: r##"Finds items imported through `std` when available through `core`."##,
22083        default_severity: Severity::Allow,
22084        warn_since: None,
22085        deny_since: None,
22086    },
22087    Lint {
22088        label: "clippy::str_split_at_newline",
22089        description: r##"Checks for usages of `str.trim().split(\
22090)` and `str.trim().split(\\
22091)`."##,
22092        default_severity: Severity::Allow,
22093        warn_since: None,
22094        deny_since: None,
22095    },
22096    Lint {
22097        label: "clippy::str_to_string",
22098        description: r##"This lint checks for `.to_string()` method calls on values of type `&str`."##,
22099        default_severity: Severity::Allow,
22100        warn_since: None,
22101        deny_since: None,
22102    },
22103    Lint {
22104        label: "clippy::string_add",
22105        description: r##"Checks for all instances of `x + _` where `x` is of type
22106`String`, but only if [`string_add_assign`](#string_add_assign) does *not*
22107match."##,
22108        default_severity: Severity::Allow,
22109        warn_since: None,
22110        deny_since: None,
22111    },
22112    Lint {
22113        label: "clippy::string_add_assign",
22114        description: r##"Checks for string appends of the form `x = x + y` (without
22115`let`!)."##,
22116        default_severity: Severity::Allow,
22117        warn_since: None,
22118        deny_since: None,
22119    },
22120    Lint {
22121        label: "clippy::string_extend_chars",
22122        description: r##"Checks for the use of `.extend(s.chars())` where s is a
22123`&str` or `String`."##,
22124        default_severity: Severity::Allow,
22125        warn_since: None,
22126        deny_since: None,
22127    },
22128    Lint {
22129        label: "clippy::string_from_utf8_as_bytes",
22130        description: r##"Check if the string is transformed to byte array and casted back to string."##,
22131        default_severity: Severity::Allow,
22132        warn_since: None,
22133        deny_since: None,
22134    },
22135    Lint {
22136        label: "clippy::string_lit_as_bytes",
22137        description: r##"Checks for the `as_bytes` method called on string literals
22138that contain only ASCII characters."##,
22139        default_severity: Severity::Allow,
22140        warn_since: None,
22141        deny_since: None,
22142    },
22143    Lint {
22144        label: "clippy::string_lit_chars_any",
22145        description: r##"Checks for `<string_lit>.chars().any(|i| i == c)`."##,
22146        default_severity: Severity::Allow,
22147        warn_since: None,
22148        deny_since: None,
22149    },
22150    Lint {
22151        label: "clippy::string_slice",
22152        description: r##"Checks for slice operations on strings"##,
22153        default_severity: Severity::Allow,
22154        warn_since: None,
22155        deny_since: None,
22156    },
22157    Lint {
22158        label: "clippy::string_to_string",
22159        description: r##"This lint checks for `.to_string()` method calls on values of type `String`."##,
22160        default_severity: Severity::Allow,
22161        warn_since: None,
22162        deny_since: None,
22163    },
22164    Lint {
22165        label: "clippy::strlen_on_c_strings",
22166        description: r##"Checks for usage of `libc::strlen` on a `CString` or `CStr` value,
22167and suggest calling `as_bytes().len()` or `to_bytes().len()` respectively instead."##,
22168        default_severity: Severity::Allow,
22169        warn_since: None,
22170        deny_since: None,
22171    },
22172    Lint {
22173        label: "clippy::struct_excessive_bools",
22174        description: r##"Checks for excessive
22175use of bools in structs."##,
22176        default_severity: Severity::Allow,
22177        warn_since: None,
22178        deny_since: None,
22179    },
22180    Lint {
22181        label: "clippy::struct_field_names",
22182        description: r##"Detects struct fields that are prefixed or suffixed
22183by the same characters or the name of the struct itself."##,
22184        default_severity: Severity::Allow,
22185        warn_since: None,
22186        deny_since: None,
22187    },
22188    Lint {
22189        label: "clippy::suboptimal_flops",
22190        description: r##"Looks for floating-point expressions that
22191can be expressed using built-in methods to improve both
22192accuracy and performance."##,
22193        default_severity: Severity::Allow,
22194        warn_since: None,
22195        deny_since: None,
22196    },
22197    Lint {
22198        label: "clippy::suspicious_arithmetic_impl",
22199        description: r##"Lints for suspicious operations in impls of arithmetic operators, e.g.
22200subtracting elements in an Add impl."##,
22201        default_severity: Severity::Allow,
22202        warn_since: None,
22203        deny_since: None,
22204    },
22205    Lint {
22206        label: "clippy::suspicious_assignment_formatting",
22207        description: r##"Checks for usage of the non-existent `=*`, `=!` and `=-`
22208operators."##,
22209        default_severity: Severity::Allow,
22210        warn_since: None,
22211        deny_since: None,
22212    },
22213    Lint {
22214        label: "clippy::suspicious_command_arg_space",
22215        description: r##"Checks for `Command::arg()` invocations that look like they
22216should be multiple arguments instead, such as `arg(-t ext2)`."##,
22217        default_severity: Severity::Allow,
22218        warn_since: None,
22219        deny_since: None,
22220    },
22221    Lint {
22222        label: "clippy::suspicious_doc_comments",
22223        description: r##"Detects the use of outer doc comments (`///`, `/**`) followed by a bang (`!`): `///!`"##,
22224        default_severity: Severity::Allow,
22225        warn_since: None,
22226        deny_since: None,
22227    },
22228    Lint {
22229        label: "clippy::suspicious_else_formatting",
22230        description: r##"Checks for formatting of `else`. It lints if the `else`
22231is followed immediately by a newline or the `else` seems to be missing."##,
22232        default_severity: Severity::Allow,
22233        warn_since: None,
22234        deny_since: None,
22235    },
22236    Lint {
22237        label: "clippy::suspicious_map",
22238        description: r##"Checks for calls to `map` followed by a `count`."##,
22239        default_severity: Severity::Allow,
22240        warn_since: None,
22241        deny_since: None,
22242    },
22243    Lint {
22244        label: "clippy::suspicious_op_assign_impl",
22245        description: r##"Lints for suspicious operations in impls of OpAssign, e.g.
22246subtracting elements in an AddAssign impl."##,
22247        default_severity: Severity::Allow,
22248        warn_since: None,
22249        deny_since: None,
22250    },
22251    Lint {
22252        label: "clippy::suspicious_open_options",
22253        description: r##"Checks for the suspicious use of `OpenOptions::create()`
22254without an explicit `OpenOptions::truncate()`."##,
22255        default_severity: Severity::Allow,
22256        warn_since: None,
22257        deny_since: None,
22258    },
22259    Lint {
22260        label: "clippy::suspicious_operation_groupings",
22261        description: r##"Checks for unlikely usages of binary operators that are almost
22262certainly typos and/or copy/paste errors, given the other usages
22263of binary operators nearby."##,
22264        default_severity: Severity::Allow,
22265        warn_since: None,
22266        deny_since: None,
22267    },
22268    Lint {
22269        label: "clippy::suspicious_splitn",
22270        description: r##"Checks for calls to [`splitn`]
22271(https://doc.rust-lang.org/std/primitive.str.html#method.splitn) and
22272related functions with either zero or one splits."##,
22273        default_severity: Severity::Allow,
22274        warn_since: None,
22275        deny_since: None,
22276    },
22277    Lint {
22278        label: "clippy::suspicious_to_owned",
22279        description: r##"Checks for the usage of `_.to_owned()`, on a `Cow<'_, _>`."##,
22280        default_severity: Severity::Allow,
22281        warn_since: None,
22282        deny_since: None,
22283    },
22284    Lint {
22285        label: "clippy::suspicious_unary_op_formatting",
22286        description: r##"Checks the formatting of a unary operator on the right hand side
22287of a binary operator. It lints if there is no space between the binary and unary operators,
22288but there is a space between the unary and its operand."##,
22289        default_severity: Severity::Allow,
22290        warn_since: None,
22291        deny_since: None,
22292    },
22293    Lint {
22294        label: "clippy::suspicious_xor_used_as_pow",
22295        description: r##"Warns for a Bitwise XOR (`^`) operator being probably confused as a powering. It will not trigger if any of the numbers are not in decimal."##,
22296        default_severity: Severity::Allow,
22297        warn_since: None,
22298        deny_since: None,
22299    },
22300    Lint {
22301        label: "clippy::swap_ptr_to_ref",
22302        description: r##"Checks for calls to `core::mem::swap` where either parameter is derived from a pointer"##,
22303        default_severity: Severity::Allow,
22304        warn_since: None,
22305        deny_since: None,
22306    },
22307    Lint {
22308        label: "clippy::tabs_in_doc_comments",
22309        description: r##"Checks doc comments for usage of tab characters."##,
22310        default_severity: Severity::Allow,
22311        warn_since: None,
22312        deny_since: None,
22313    },
22314    Lint {
22315        label: "clippy::temporary_assignment",
22316        description: r##"Checks for construction of a structure or tuple just to
22317assign a value in it."##,
22318        default_severity: Severity::Allow,
22319        warn_since: None,
22320        deny_since: None,
22321    },
22322    Lint {
22323        label: "clippy::test_attr_in_doctest",
22324        description: r##"Checks for `#[test]` in doctests unless they are marked with
22325either `ignore`, `no_run` or `compile_fail`."##,
22326        default_severity: Severity::Allow,
22327        warn_since: None,
22328        deny_since: None,
22329    },
22330    Lint {
22331        label: "clippy::tests_outside_test_module",
22332        description: r##"Triggers when a testing function (marked with the `#[test]` attribute) isn't inside a testing module
22333(marked with `#[cfg(test)]`)."##,
22334        default_severity: Severity::Allow,
22335        warn_since: None,
22336        deny_since: None,
22337    },
22338    Lint {
22339        label: "clippy::to_digit_is_some",
22340        description: r##"Checks for `.to_digit(..).is_some()` on `char`s."##,
22341        default_severity: Severity::Allow,
22342        warn_since: None,
22343        deny_since: None,
22344    },
22345    Lint {
22346        label: "clippy::to_string_in_format_args",
22347        description: r##"Checks for [`ToString::to_string`](https://doc.rust-lang.org/std/string/trait.ToString.html#tymethod.to_string)
22348applied to a type that implements [`Display`](https://doc.rust-lang.org/std/fmt/trait.Display.html)
22349in a macro that does formatting."##,
22350        default_severity: Severity::Allow,
22351        warn_since: None,
22352        deny_since: None,
22353    },
22354    Lint {
22355        label: "clippy::to_string_trait_impl",
22356        description: r##"Checks for direct implementations of `ToString`."##,
22357        default_severity: Severity::Allow,
22358        warn_since: None,
22359        deny_since: None,
22360    },
22361    Lint {
22362        label: "clippy::todo",
22363        description: r##"Checks for usage of `todo!`."##,
22364        default_severity: Severity::Allow,
22365        warn_since: None,
22366        deny_since: None,
22367    },
22368    Lint {
22369        label: "clippy::too_long_first_doc_paragraph",
22370        description: r##"Checks if the first line in the documentation of items listed in module page is too long."##,
22371        default_severity: Severity::Allow,
22372        warn_since: None,
22373        deny_since: None,
22374    },
22375    Lint {
22376        label: "clippy::too_many_arguments",
22377        description: r##"Checks for functions with too many parameters."##,
22378        default_severity: Severity::Allow,
22379        warn_since: None,
22380        deny_since: None,
22381    },
22382    Lint {
22383        label: "clippy::too_many_lines",
22384        description: r##"Checks for functions with a large amount of lines."##,
22385        default_severity: Severity::Allow,
22386        warn_since: None,
22387        deny_since: None,
22388    },
22389    Lint {
22390        label: "clippy::toplevel_ref_arg",
22391        description: r##"Checks for function arguments and let bindings denoted as
22392`ref`."##,
22393        default_severity: Severity::Allow,
22394        warn_since: None,
22395        deny_since: None,
22396    },
22397    Lint {
22398        label: "clippy::trailing_empty_array",
22399        description: r##"Displays a warning when a struct with a trailing zero-sized array is declared without a `repr` attribute."##,
22400        default_severity: Severity::Allow,
22401        warn_since: None,
22402        deny_since: None,
22403    },
22404    Lint {
22405        label: "clippy::trait_duplication_in_bounds",
22406        description: r##"Checks for cases where generics or trait objects are being used and multiple
22407syntax specifications for trait bounds are used simultaneously."##,
22408        default_severity: Severity::Allow,
22409        warn_since: None,
22410        deny_since: None,
22411    },
22412    Lint {
22413        label: "clippy::transmute_bytes_to_str",
22414        description: r##"Checks for transmutes from a `&[u8]` to a `&str`."##,
22415        default_severity: Severity::Allow,
22416        warn_since: None,
22417        deny_since: None,
22418    },
22419    Lint {
22420        label: "clippy::transmute_float_to_int",
22421        description: r##"Checks for transmutes from a float to an integer."##,
22422        default_severity: Severity::Allow,
22423        warn_since: None,
22424        deny_since: None,
22425    },
22426    Lint {
22427        label: "clippy::transmute_int_to_bool",
22428        description: r##"Checks for transmutes from an integer to a `bool`."##,
22429        default_severity: Severity::Allow,
22430        warn_since: None,
22431        deny_since: None,
22432    },
22433    Lint {
22434        label: "clippy::transmute_int_to_char",
22435        description: r##"Checks for transmutes from an integer to a `char`."##,
22436        default_severity: Severity::Allow,
22437        warn_since: None,
22438        deny_since: None,
22439    },
22440    Lint {
22441        label: "clippy::transmute_int_to_float",
22442        description: r##"Checks for transmutes from an integer to a float."##,
22443        default_severity: Severity::Allow,
22444        warn_since: None,
22445        deny_since: None,
22446    },
22447    Lint {
22448        label: "clippy::transmute_int_to_non_zero",
22449        description: r##"Checks for transmutes from `T` to `NonZero<T>`, and suggests the `new_unchecked`
22450method instead."##,
22451        default_severity: Severity::Allow,
22452        warn_since: None,
22453        deny_since: None,
22454    },
22455    Lint {
22456        label: "clippy::transmute_null_to_fn",
22457        description: r##"Checks for null function pointer creation through transmute."##,
22458        default_severity: Severity::Allow,
22459        warn_since: None,
22460        deny_since: None,
22461    },
22462    Lint {
22463        label: "clippy::transmute_num_to_bytes",
22464        description: r##"Checks for transmutes from a number to an array of `u8`"##,
22465        default_severity: Severity::Allow,
22466        warn_since: None,
22467        deny_since: None,
22468    },
22469    Lint {
22470        label: "clippy::transmute_ptr_to_ptr",
22471        description: r##"Checks for transmutes from a pointer to a pointer, or
22472from a reference to a reference."##,
22473        default_severity: Severity::Allow,
22474        warn_since: None,
22475        deny_since: None,
22476    },
22477    Lint {
22478        label: "clippy::transmute_ptr_to_ref",
22479        description: r##"Checks for transmutes from a pointer to a reference."##,
22480        default_severity: Severity::Allow,
22481        warn_since: None,
22482        deny_since: None,
22483    },
22484    Lint {
22485        label: "clippy::transmute_undefined_repr",
22486        description: r##"Checks for transmutes between types which do not have a representation defined relative to
22487each other."##,
22488        default_severity: Severity::Allow,
22489        warn_since: None,
22490        deny_since: None,
22491    },
22492    Lint {
22493        label: "clippy::transmutes_expressible_as_ptr_casts",
22494        description: r##"Checks for transmutes that could be a pointer cast."##,
22495        default_severity: Severity::Allow,
22496        warn_since: None,
22497        deny_since: None,
22498    },
22499    Lint {
22500        label: "clippy::transmuting_null",
22501        description: r##"Checks for transmute calls which would receive a null pointer."##,
22502        default_severity: Severity::Allow,
22503        warn_since: None,
22504        deny_since: None,
22505    },
22506    Lint {
22507        label: "clippy::trim_split_whitespace",
22508        description: r##"Warns about calling `str::trim` (or variants) before `str::split_whitespace`."##,
22509        default_severity: Severity::Allow,
22510        warn_since: None,
22511        deny_since: None,
22512    },
22513    Lint {
22514        label: "clippy::trivial_regex",
22515        description: r##"Checks for trivial [regex](https://crates.io/crates/regex)
22516creation (with `Regex::new`, `RegexBuilder::new`, or `RegexSet::new`)."##,
22517        default_severity: Severity::Allow,
22518        warn_since: None,
22519        deny_since: None,
22520    },
22521    Lint {
22522        label: "clippy::trivially_copy_pass_by_ref",
22523        description: r##"Checks for functions taking arguments by reference, where
22524the argument type is `Copy` and small enough to be more efficient to always
22525pass by value."##,
22526        default_severity: Severity::Allow,
22527        warn_since: None,
22528        deny_since: None,
22529    },
22530    Lint {
22531        label: "clippy::try_err",
22532        description: r##"Checks for usage of `Err(x)?`."##,
22533        default_severity: Severity::Allow,
22534        warn_since: None,
22535        deny_since: None,
22536    },
22537    Lint {
22538        label: "clippy::tuple_array_conversions",
22539        description: r##"Checks for tuple<=>array conversions that are not done with `.into()`."##,
22540        default_severity: Severity::Allow,
22541        warn_since: None,
22542        deny_since: None,
22543    },
22544    Lint {
22545        label: "clippy::type_complexity",
22546        description: r##"Checks for types used in structs, parameters and `let`
22547declarations above a certain complexity threshold."##,
22548        default_severity: Severity::Allow,
22549        warn_since: None,
22550        deny_since: None,
22551    },
22552    Lint {
22553        label: "clippy::type_id_on_box",
22554        description: r##"Looks for calls to `.type_id()` on a `Box<dyn _>`."##,
22555        default_severity: Severity::Allow,
22556        warn_since: None,
22557        deny_since: None,
22558    },
22559    Lint {
22560        label: "clippy::type_repetition_in_bounds",
22561        description: r##"This lint warns about unnecessary type repetitions in trait bounds"##,
22562        default_severity: Severity::Allow,
22563        warn_since: None,
22564        deny_since: None,
22565    },
22566    Lint {
22567        label: "clippy::unchecked_duration_subtraction",
22568        description: r##"Lints subtraction between an `Instant` and a `Duration`."##,
22569        default_severity: Severity::Allow,
22570        warn_since: None,
22571        deny_since: None,
22572    },
22573    Lint {
22574        label: "clippy::unconditional_recursion",
22575        description: r##"Checks that there isn't an infinite recursion in trait
22576implementations."##,
22577        default_severity: Severity::Allow,
22578        warn_since: None,
22579        deny_since: None,
22580    },
22581    Lint {
22582        label: "clippy::undocumented_unsafe_blocks",
22583        description: r##"Checks for `unsafe` blocks and impls without a `// SAFETY: ` comment
22584explaining why the unsafe operations performed inside
22585the block are safe.
22586
22587Note the comment must appear on the line(s) preceding the unsafe block
22588with nothing appearing in between. The following is ok:
22589```rust
22590foo(
22591    // SAFETY:
22592    // This is a valid safety comment
22593    unsafe { *x }
22594)
22595```
22596But neither of these are:
22597```rust
22598// SAFETY:
22599// This is not a valid safety comment
22600foo(
22601    /* SAFETY: Neither is this */ unsafe { *x },
22602);
22603```"##,
22604        default_severity: Severity::Allow,
22605        warn_since: None,
22606        deny_since: None,
22607    },
22608    Lint {
22609        label: "clippy::unicode_not_nfc",
22610        description: r##"Checks for string literals that contain Unicode in a form
22611that is not equal to its
22612[NFC-recomposition](http://www.unicode.org/reports/tr15/#Norm_Forms)."##,
22613        default_severity: Severity::Allow,
22614        warn_since: None,
22615        deny_since: None,
22616    },
22617    Lint {
22618        label: "clippy::unimplemented",
22619        description: r##"Checks for usage of `unimplemented!`."##,
22620        default_severity: Severity::Allow,
22621        warn_since: None,
22622        deny_since: None,
22623    },
22624    Lint {
22625        label: "clippy::uninhabited_references",
22626        description: r##"It detects references to uninhabited types, such as `!` and
22627warns when those are either dereferenced or returned from a function."##,
22628        default_severity: Severity::Allow,
22629        warn_since: None,
22630        deny_since: None,
22631    },
22632    Lint {
22633        label: "clippy::uninit_assumed_init",
22634        description: r##"Checks for `MaybeUninit::uninit().assume_init()`."##,
22635        default_severity: Severity::Allow,
22636        warn_since: None,
22637        deny_since: None,
22638    },
22639    Lint {
22640        label: "clippy::uninit_vec",
22641        description: r##"Checks for `set_len()` call that creates `Vec` with uninitialized elements.
22642This is commonly caused by calling `set_len()` right after allocating or
22643reserving a buffer with `new()`, `default()`, `with_capacity()`, or `reserve()`."##,
22644        default_severity: Severity::Allow,
22645        warn_since: None,
22646        deny_since: None,
22647    },
22648    Lint {
22649        label: "clippy::uninlined_format_args",
22650        description: r##"Detect when a variable is not inlined in a format string,
22651and suggests to inline it."##,
22652        default_severity: Severity::Allow,
22653        warn_since: None,
22654        deny_since: None,
22655    },
22656    Lint {
22657        label: "clippy::unit_arg",
22658        description: r##"Checks for passing a unit value as an argument to a function without using a
22659unit literal (`()`)."##,
22660        default_severity: Severity::Allow,
22661        warn_since: None,
22662        deny_since: None,
22663    },
22664    Lint {
22665        label: "clippy::unit_cmp",
22666        description: r##"Checks for comparisons to unit. This includes all binary
22667comparisons (like `==` and `<`) and asserts."##,
22668        default_severity: Severity::Allow,
22669        warn_since: None,
22670        deny_since: None,
22671    },
22672    Lint {
22673        label: "clippy::unit_hash",
22674        description: r##"Detects `().hash(_)`."##,
22675        default_severity: Severity::Allow,
22676        warn_since: None,
22677        deny_since: None,
22678    },
22679    Lint {
22680        label: "clippy::unit_return_expecting_ord",
22681        description: r##"Checks for functions that expect closures of type
22682Fn(...) -> Ord where the implemented closure returns the unit type.
22683The lint also suggests to remove the semi-colon at the end of the statement if present."##,
22684        default_severity: Severity::Allow,
22685        warn_since: None,
22686        deny_since: None,
22687    },
22688    Lint {
22689        label: "clippy::unnecessary_box_returns",
22690        description: r##"Checks for a return type containing a `Box<T>` where `T` implements `Sized`
22691
22692The lint ignores `Box<T>` where `T` is larger than `unnecessary_box_size`,
22693as returning a large `T` directly may be detrimental to performance."##,
22694        default_severity: Severity::Allow,
22695        warn_since: None,
22696        deny_since: None,
22697    },
22698    Lint {
22699        label: "clippy::unnecessary_cast",
22700        description: r##"Checks for casts to the same type, casts of int literals to integer
22701types, casts of float literals to float types, and casts between raw
22702pointers that don't change type or constness."##,
22703        default_severity: Severity::Allow,
22704        warn_since: None,
22705        deny_since: None,
22706    },
22707    Lint {
22708        label: "clippy::unnecessary_clippy_cfg",
22709        description: r##"Checks for `#[cfg_attr(clippy, allow(clippy::lint))]`
22710and suggests to replace it with `#[allow(clippy::lint)]`."##,
22711        default_severity: Severity::Allow,
22712        warn_since: None,
22713        deny_since: None,
22714    },
22715    Lint {
22716        label: "clippy::unnecessary_fallible_conversions",
22717        description: r##"Checks for calls to `TryInto::try_into` and `TryFrom::try_from` when their infallible counterparts
22718could be used."##,
22719        default_severity: Severity::Allow,
22720        warn_since: None,
22721        deny_since: None,
22722    },
22723    Lint {
22724        label: "clippy::unnecessary_filter_map",
22725        description: r##"Checks for `filter_map` calls that could be replaced by `filter` or `map`.
22726More specifically it checks if the closure provided is only performing one of the
22727filter or map operations and suggests the appropriate option."##,
22728        default_severity: Severity::Allow,
22729        warn_since: None,
22730        deny_since: None,
22731    },
22732    Lint {
22733        label: "clippy::unnecessary_find_map",
22734        description: r##"Checks for `find_map` calls that could be replaced by `find` or `map`. More
22735specifically it checks if the closure provided is only performing one of the
22736find or map operations and suggests the appropriate option."##,
22737        default_severity: Severity::Allow,
22738        warn_since: None,
22739        deny_since: None,
22740    },
22741    Lint {
22742        label: "clippy::unnecessary_first_then_check",
22743        description: r##"Checks the usage of `.first().is_some()` or `.first().is_none()` to check if a slice is
22744empty."##,
22745        default_severity: Severity::Allow,
22746        warn_since: None,
22747        deny_since: None,
22748    },
22749    Lint {
22750        label: "clippy::unnecessary_fold",
22751        description: r##"Checks for usage of `fold` when a more succinct alternative exists.
22752Specifically, this checks for `fold`s which could be replaced by `any`, `all`,
22753`sum` or `product`."##,
22754        default_severity: Severity::Allow,
22755        warn_since: None,
22756        deny_since: None,
22757    },
22758    Lint {
22759        label: "clippy::unnecessary_get_then_check",
22760        description: r##"Checks the usage of `.get().is_some()` or `.get().is_none()` on std map types."##,
22761        default_severity: Severity::Allow,
22762        warn_since: None,
22763        deny_since: None,
22764    },
22765    Lint {
22766        label: "clippy::unnecessary_join",
22767        description: r##"Checks for usage of `.collect::<Vec<String>>().join()` on iterators."##,
22768        default_severity: Severity::Allow,
22769        warn_since: None,
22770        deny_since: None,
22771    },
22772    Lint {
22773        label: "clippy::unnecessary_lazy_evaluations",
22774        description: r##"As the counterpart to `or_fun_call`, this lint looks for unnecessary
22775lazily evaluated closures on `Option` and `Result`.
22776
22777This lint suggests changing the following functions, when eager evaluation results in
22778simpler code:
22779 - `unwrap_or_else` to `unwrap_or`
22780 - `and_then` to `and`
22781 - `or_else` to `or`
22782 - `get_or_insert_with` to `get_or_insert`
22783 - `ok_or_else` to `ok_or`
22784 - `then` to `then_some` (for msrv >= 1.62.0)"##,
22785        default_severity: Severity::Allow,
22786        warn_since: None,
22787        deny_since: None,
22788    },
22789    Lint {
22790        label: "clippy::unnecessary_literal_unwrap",
22791        description: r##"Checks for `.unwrap()` related calls on `Result`s and `Option`s that are constructed."##,
22792        default_severity: Severity::Allow,
22793        warn_since: None,
22794        deny_since: None,
22795    },
22796    Lint {
22797        label: "clippy::unnecessary_map_on_constructor",
22798        description: r##"Suggests removing the use of a `map()` (or `map_err()`) method when an `Option` or `Result`
22799is being constructed."##,
22800        default_severity: Severity::Allow,
22801        warn_since: None,
22802        deny_since: None,
22803    },
22804    Lint {
22805        label: "clippy::unnecessary_min_or_max",
22806        description: r##"Checks for unnecessary calls to `min()` or `max()` in the following cases
22807- Either both side is constant
22808- One side is clearly larger than the other, like i32::MIN and an i32 variable"##,
22809        default_severity: Severity::Allow,
22810        warn_since: None,
22811        deny_since: None,
22812    },
22813    Lint {
22814        label: "clippy::unnecessary_mut_passed",
22815        description: r##"Detects passing a mutable reference to a function that only
22816requires an immutable reference."##,
22817        default_severity: Severity::Allow,
22818        warn_since: None,
22819        deny_since: None,
22820    },
22821    Lint {
22822        label: "clippy::unnecessary_operation",
22823        description: r##"Checks for expression statements that can be reduced to a
22824sub-expression."##,
22825        default_severity: Severity::Allow,
22826        warn_since: None,
22827        deny_since: None,
22828    },
22829    Lint {
22830        label: "clippy::unnecessary_owned_empty_strings",
22831        description: r##"Detects cases of owned empty strings being passed as an argument to a function expecting `&str`"##,
22832        default_severity: Severity::Allow,
22833        warn_since: None,
22834        deny_since: None,
22835    },
22836    Lint {
22837        label: "clippy::unnecessary_result_map_or_else",
22838        description: r##"Checks for usage of `.map_or_else()` map closure for `Result` type."##,
22839        default_severity: Severity::Allow,
22840        warn_since: None,
22841        deny_since: None,
22842    },
22843    Lint {
22844        label: "clippy::unnecessary_safety_comment",
22845        description: r##"Checks for `// SAFETY: ` comments on safe code."##,
22846        default_severity: Severity::Allow,
22847        warn_since: None,
22848        deny_since: None,
22849    },
22850    Lint {
22851        label: "clippy::unnecessary_safety_doc",
22852        description: r##"Checks for the doc comments of publicly visible
22853safe functions and traits and warns if there is a `# Safety` section."##,
22854        default_severity: Severity::Allow,
22855        warn_since: None,
22856        deny_since: None,
22857    },
22858    Lint {
22859        label: "clippy::unnecessary_self_imports",
22860        description: r##"Checks for imports ending in `::{self}`."##,
22861        default_severity: Severity::Allow,
22862        warn_since: None,
22863        deny_since: None,
22864    },
22865    Lint {
22866        label: "clippy::unnecessary_sort_by",
22867        description: r##"Checks for usage of `Vec::sort_by` passing in a closure
22868which compares the two arguments, either directly or indirectly."##,
22869        default_severity: Severity::Allow,
22870        warn_since: None,
22871        deny_since: None,
22872    },
22873    Lint {
22874        label: "clippy::unnecessary_struct_initialization",
22875        description: r##"Checks for initialization of an identical `struct` from another instance
22876of the type, either by copying a base without setting any field or by
22877moving all fields individually."##,
22878        default_severity: Severity::Allow,
22879        warn_since: None,
22880        deny_since: None,
22881    },
22882    Lint {
22883        label: "clippy::unnecessary_to_owned",
22884        description: r##"Checks for unnecessary calls to [`ToOwned::to_owned`](https://doc.rust-lang.org/std/borrow/trait.ToOwned.html#tymethod.to_owned)
22885and other `to_owned`-like functions."##,
22886        default_severity: Severity::Allow,
22887        warn_since: None,
22888        deny_since: None,
22889    },
22890    Lint {
22891        label: "clippy::unnecessary_unwrap",
22892        description: r##"Checks for calls of `unwrap[_err]()` that cannot fail."##,
22893        default_severity: Severity::Allow,
22894        warn_since: None,
22895        deny_since: None,
22896    },
22897    Lint {
22898        label: "clippy::unnecessary_wraps",
22899        description: r##"Checks for private functions that only return `Ok` or `Some`."##,
22900        default_severity: Severity::Allow,
22901        warn_since: None,
22902        deny_since: None,
22903    },
22904    Lint {
22905        label: "clippy::unneeded_field_pattern",
22906        description: r##"Checks for structure field patterns bound to wildcards."##,
22907        default_severity: Severity::Allow,
22908        warn_since: None,
22909        deny_since: None,
22910    },
22911    Lint {
22912        label: "clippy::unneeded_wildcard_pattern",
22913        description: r##"Checks for tuple patterns with a wildcard
22914pattern (`_`) is next to a rest pattern (`..`).
22915
22916_NOTE_: While `_, ..` means there is at least one element left, `..`
22917means there are 0 or more elements left. This can make a difference
22918when refactoring, but shouldn't result in errors in the refactored code,
22919since the wildcard pattern isn't used anyway."##,
22920        default_severity: Severity::Allow,
22921        warn_since: None,
22922        deny_since: None,
22923    },
22924    Lint {
22925        label: "clippy::unnested_or_patterns",
22926        description: r##"Checks for unnested or-patterns, e.g., `Some(0) | Some(2)` and
22927suggests replacing the pattern with a nested one, `Some(0 | 2)`.
22928
22929Another way to think of this is that it rewrites patterns in
22930*disjunctive normal form (DNF)* into *conjunctive normal form (CNF)*."##,
22931        default_severity: Severity::Allow,
22932        warn_since: None,
22933        deny_since: None,
22934    },
22935    Lint {
22936        label: "clippy::unreachable",
22937        description: r##"Checks for usage of `unreachable!`."##,
22938        default_severity: Severity::Allow,
22939        warn_since: None,
22940        deny_since: None,
22941    },
22942    Lint {
22943        label: "clippy::unreadable_literal",
22944        description: r##"Warns if a long integral or floating-point constant does
22945not contain underscores."##,
22946        default_severity: Severity::Allow,
22947        warn_since: None,
22948        deny_since: None,
22949    },
22950    Lint {
22951        label: "clippy::unsafe_derive_deserialize",
22952        description: r##"Checks for deriving `serde::Deserialize` on a type that
22953has methods using `unsafe`."##,
22954        default_severity: Severity::Allow,
22955        warn_since: None,
22956        deny_since: None,
22957    },
22958    Lint {
22959        label: "clippy::unsafe_removed_from_name",
22960        description: r##"Checks for imports that remove unsafe from an item's
22961name."##,
22962        default_severity: Severity::Allow,
22963        warn_since: None,
22964        deny_since: None,
22965    },
22966    Lint {
22967        label: "clippy::unsafe_vector_initialization",
22968        description: r##"Nothing. This lint has been deprecated"##,
22969        default_severity: Severity::Allow,
22970        warn_since: None,
22971        deny_since: None,
22972    },
22973    Lint {
22974        label: "clippy::unseparated_literal_suffix",
22975        description: r##"Warns if literal suffixes are not separated by an
22976underscore.
22977To enforce unseparated literal suffix style,
22978see the `separated_literal_suffix` lint."##,
22979        default_severity: Severity::Allow,
22980        warn_since: None,
22981        deny_since: None,
22982    },
22983    Lint {
22984        label: "clippy::unsound_collection_transmute",
22985        description: r##"Checks for transmutes between collections whose
22986types have different ABI, size or alignment."##,
22987        default_severity: Severity::Allow,
22988        warn_since: None,
22989        deny_since: None,
22990    },
22991    Lint {
22992        label: "clippy::unstable_as_mut_slice",
22993        description: r##"Nothing. This lint has been deprecated"##,
22994        default_severity: Severity::Allow,
22995        warn_since: None,
22996        deny_since: None,
22997    },
22998    Lint {
22999        label: "clippy::unstable_as_slice",
23000        description: r##"Nothing. This lint has been deprecated"##,
23001        default_severity: Severity::Allow,
23002        warn_since: None,
23003        deny_since: None,
23004    },
23005    Lint {
23006        label: "clippy::unused_async",
23007        description: r##"Checks for functions that are declared `async` but have no `.await`s inside of them."##,
23008        default_severity: Severity::Allow,
23009        warn_since: None,
23010        deny_since: None,
23011    },
23012    Lint {
23013        label: "clippy::unused_collect",
23014        description: r##"Nothing. This lint has been deprecated"##,
23015        default_severity: Severity::Allow,
23016        warn_since: None,
23017        deny_since: None,
23018    },
23019    Lint {
23020        label: "clippy::unused_enumerate_index",
23021        description: r##"Checks for uses of the `enumerate` method where the index is unused (`_`)"##,
23022        default_severity: Severity::Allow,
23023        warn_since: None,
23024        deny_since: None,
23025    },
23026    Lint {
23027        label: "clippy::unused_format_specs",
23028        description: r##"Detects [formatting parameters] that have no effect on the output of
23029`format!()`, `println!()` or similar macros."##,
23030        default_severity: Severity::Allow,
23031        warn_since: None,
23032        deny_since: None,
23033    },
23034    Lint {
23035        label: "clippy::unused_io_amount",
23036        description: r##"Checks for unused written/read amount."##,
23037        default_severity: Severity::Allow,
23038        warn_since: None,
23039        deny_since: None,
23040    },
23041    Lint {
23042        label: "clippy::unused_peekable",
23043        description: r##"Checks for the creation of a `peekable` iterator that is never `.peek()`ed"##,
23044        default_severity: Severity::Allow,
23045        warn_since: None,
23046        deny_since: None,
23047    },
23048    Lint {
23049        label: "clippy::unused_result_ok",
23050        description: r##"Checks for calls to `Result::ok()` without using the returned `Option`."##,
23051        default_severity: Severity::Allow,
23052        warn_since: None,
23053        deny_since: None,
23054    },
23055    Lint {
23056        label: "clippy::unused_rounding",
23057        description: r##"Detects cases where a whole-number literal float is being rounded, using
23058the `floor`, `ceil`, or `round` methods."##,
23059        default_severity: Severity::Allow,
23060        warn_since: None,
23061        deny_since: None,
23062    },
23063    Lint {
23064        label: "clippy::unused_self",
23065        description: r##"Checks methods that contain a `self` argument but don't use it"##,
23066        default_severity: Severity::Allow,
23067        warn_since: None,
23068        deny_since: None,
23069    },
23070    Lint {
23071        label: "clippy::unused_trait_names",
23072        description: r##"Checks for `use Trait` where the Trait is only used for its methods and not referenced by a path directly."##,
23073        default_severity: Severity::Allow,
23074        warn_since: None,
23075        deny_since: None,
23076    },
23077    Lint {
23078        label: "clippy::unused_unit",
23079        description: r##"Checks for unit (`()`) expressions that can be removed."##,
23080        default_severity: Severity::Allow,
23081        warn_since: None,
23082        deny_since: None,
23083    },
23084    Lint {
23085        label: "clippy::unusual_byte_groupings",
23086        description: r##"Warns if hexadecimal or binary literals are not grouped
23087by nibble or byte."##,
23088        default_severity: Severity::Allow,
23089        warn_since: None,
23090        deny_since: None,
23091    },
23092    Lint {
23093        label: "clippy::unwrap_in_result",
23094        description: r##"Checks for functions of type `Result` that contain `expect()` or `unwrap()`"##,
23095        default_severity: Severity::Allow,
23096        warn_since: None,
23097        deny_since: None,
23098    },
23099    Lint {
23100        label: "clippy::unwrap_or_default",
23101        description: r##"Checks for usages of the following functions with an argument that constructs a default value
23102(e.g., `Default::default` or `String::new`):
23103- `unwrap_or`
23104- `unwrap_or_else`
23105- `or_insert`
23106- `or_insert_with`"##,
23107        default_severity: Severity::Allow,
23108        warn_since: None,
23109        deny_since: None,
23110    },
23111    Lint {
23112        label: "clippy::unwrap_used",
23113        description: r##"Checks for `.unwrap()` or `.unwrap_err()` calls on `Result`s and `.unwrap()` call on `Option`s."##,
23114        default_severity: Severity::Allow,
23115        warn_since: None,
23116        deny_since: None,
23117    },
23118    Lint {
23119        label: "clippy::upper_case_acronyms",
23120        description: r##"Checks for fully capitalized names and optionally names containing a capitalized acronym."##,
23121        default_severity: Severity::Allow,
23122        warn_since: None,
23123        deny_since: None,
23124    },
23125    Lint {
23126        label: "clippy::use_debug",
23127        description: r##"Checks for usage of `Debug` formatting. The purpose of this
23128lint is to catch debugging remnants."##,
23129        default_severity: Severity::Allow,
23130        warn_since: None,
23131        deny_since: None,
23132    },
23133    Lint {
23134        label: "clippy::use_self",
23135        description: r##"Checks for unnecessary repetition of structure name when a
23136replacement with `Self` is applicable."##,
23137        default_severity: Severity::Allow,
23138        warn_since: None,
23139        deny_since: None,
23140    },
23141    Lint {
23142        label: "clippy::used_underscore_binding",
23143        description: r##"Checks for the use of bindings with a single leading
23144underscore."##,
23145        default_severity: Severity::Allow,
23146        warn_since: None,
23147        deny_since: None,
23148    },
23149    Lint {
23150        label: "clippy::used_underscore_items",
23151        description: r##"Checks for the use of item with a single leading
23152underscore."##,
23153        default_severity: Severity::Allow,
23154        warn_since: None,
23155        deny_since: None,
23156    },
23157    Lint {
23158        label: "clippy::useless_asref",
23159        description: r##"Checks for usage of `.as_ref()` or `.as_mut()` where the
23160types before and after the call are the same."##,
23161        default_severity: Severity::Allow,
23162        warn_since: None,
23163        deny_since: None,
23164    },
23165    Lint {
23166        label: "clippy::useless_attribute",
23167        description: r##"Checks for `extern crate` and `use` items annotated with
23168lint attributes.
23169
23170This lint permits lint attributes for lints emitted on the items themself.
23171For `use` items these lints are:
23172* ambiguous_glob_reexports
23173* dead_code
23174* deprecated
23175* hidden_glob_reexports
23176* unreachable_pub
23177* unused
23178* unused_braces
23179* unused_import_braces
23180* clippy::disallowed_types
23181* clippy::enum_glob_use
23182* clippy::macro_use_imports
23183* clippy::module_name_repetitions
23184* clippy::redundant_pub_crate
23185* clippy::single_component_path_imports
23186* clippy::unsafe_removed_from_name
23187* clippy::wildcard_imports
23188
23189For `extern crate` items these lints are:
23190* `unused_imports` on items with `#[macro_use]`"##,
23191        default_severity: Severity::Allow,
23192        warn_since: None,
23193        deny_since: None,
23194    },
23195    Lint {
23196        label: "clippy::useless_conversion",
23197        description: r##"Checks for `Into`, `TryInto`, `From`, `TryFrom`, or `IntoIter` calls
23198which uselessly convert to the same type."##,
23199        default_severity: Severity::Allow,
23200        warn_since: None,
23201        deny_since: None,
23202    },
23203    Lint {
23204        label: "clippy::useless_format",
23205        description: r##"Checks for the use of `format!(string literal with no
23206argument)` and `format!({}, foo)` where `foo` is a string."##,
23207        default_severity: Severity::Allow,
23208        warn_since: None,
23209        deny_since: None,
23210    },
23211    Lint {
23212        label: "clippy::useless_let_if_seq",
23213        description: r##"Checks for variable declarations immediately followed by a
23214conditional affectation."##,
23215        default_severity: Severity::Allow,
23216        warn_since: None,
23217        deny_since: None,
23218    },
23219    Lint {
23220        label: "clippy::useless_transmute",
23221        description: r##"Checks for transmutes to the original type of the object
23222and transmutes that could be a cast."##,
23223        default_severity: Severity::Allow,
23224        warn_since: None,
23225        deny_since: None,
23226    },
23227    Lint {
23228        label: "clippy::useless_vec",
23229        description: r##"Checks for usage of `vec![..]` when using `[..]` would
23230be possible."##,
23231        default_severity: Severity::Allow,
23232        warn_since: None,
23233        deny_since: None,
23234    },
23235    Lint {
23236        label: "clippy::vec_box",
23237        description: r##"Checks for usage of `Vec<Box<T>>` where T: Sized anywhere in the code.
23238Check the [Box documentation](https://doc.rust-lang.org/std/boxed/index.html) for more information."##,
23239        default_severity: Severity::Allow,
23240        warn_since: None,
23241        deny_since: None,
23242    },
23243    Lint {
23244        label: "clippy::vec_init_then_push",
23245        description: r##"Checks for calls to `push` immediately after creating a new `Vec`.
23246
23247If the `Vec` is created using `with_capacity` this will only lint if the capacity is a
23248constant and the number of pushes is greater than or equal to the initial capacity.
23249
23250If the `Vec` is extended after the initial sequence of pushes and it was default initialized
23251then this will only lint after there were at least four pushes. This number may change in
23252the future."##,
23253        default_severity: Severity::Allow,
23254        warn_since: None,
23255        deny_since: None,
23256    },
23257    Lint {
23258        label: "clippy::vec_resize_to_zero",
23259        description: r##"Finds occurrences of `Vec::resize(0, an_int)`"##,
23260        default_severity: Severity::Allow,
23261        warn_since: None,
23262        deny_since: None,
23263    },
23264    Lint {
23265        label: "clippy::verbose_bit_mask",
23266        description: r##"Checks for bit masks that can be replaced by a call
23267to `trailing_zeros`"##,
23268        default_severity: Severity::Allow,
23269        warn_since: None,
23270        deny_since: None,
23271    },
23272    Lint {
23273        label: "clippy::verbose_file_reads",
23274        description: r##"Checks for usage of File::read_to_end and File::read_to_string."##,
23275        default_severity: Severity::Allow,
23276        warn_since: None,
23277        deny_since: None,
23278    },
23279    Lint {
23280        label: "clippy::waker_clone_wake",
23281        description: r##"Checks for usage of `waker.clone().wake()`"##,
23282        default_severity: Severity::Allow,
23283        warn_since: None,
23284        deny_since: None,
23285    },
23286    Lint {
23287        label: "clippy::while_float",
23288        description: r##"Checks for while loops comparing floating point values."##,
23289        default_severity: Severity::Allow,
23290        warn_since: None,
23291        deny_since: None,
23292    },
23293    Lint {
23294        label: "clippy::while_immutable_condition",
23295        description: r##"Checks whether variables used within while loop condition
23296can be (and are) mutated in the body."##,
23297        default_severity: Severity::Allow,
23298        warn_since: None,
23299        deny_since: None,
23300    },
23301    Lint {
23302        label: "clippy::while_let_loop",
23303        description: r##"Detects `loop + match` combinations that are easier
23304written as a `while let` loop."##,
23305        default_severity: Severity::Allow,
23306        warn_since: None,
23307        deny_since: None,
23308    },
23309    Lint {
23310        label: "clippy::while_let_on_iterator",
23311        description: r##"Checks for `while let` expressions on iterators."##,
23312        default_severity: Severity::Allow,
23313        warn_since: None,
23314        deny_since: None,
23315    },
23316    Lint {
23317        label: "clippy::wildcard_dependencies",
23318        description: r##"Checks for wildcard dependencies in the `Cargo.toml`."##,
23319        default_severity: Severity::Allow,
23320        warn_since: None,
23321        deny_since: None,
23322    },
23323    Lint {
23324        label: "clippy::wildcard_enum_match_arm",
23325        description: r##"Checks for wildcard enum matches using `_`."##,
23326        default_severity: Severity::Allow,
23327        warn_since: None,
23328        deny_since: None,
23329    },
23330    Lint {
23331        label: "clippy::wildcard_imports",
23332        description: r##"Checks for wildcard imports `use _::*`."##,
23333        default_severity: Severity::Allow,
23334        warn_since: None,
23335        deny_since: None,
23336    },
23337    Lint {
23338        label: "clippy::wildcard_in_or_patterns",
23339        description: r##"Checks for wildcard pattern used with others patterns in same match arm."##,
23340        default_severity: Severity::Allow,
23341        warn_since: None,
23342        deny_since: None,
23343    },
23344    Lint {
23345        label: "clippy::write_literal",
23346        description: r##"This lint warns about the use of literals as `write!`/`writeln!` args."##,
23347        default_severity: Severity::Allow,
23348        warn_since: None,
23349        deny_since: None,
23350    },
23351    Lint {
23352        label: "clippy::write_with_newline",
23353        description: r##"This lint warns when you use `write!()` with a format
23354string that
23355ends in a newline."##,
23356        default_severity: Severity::Allow,
23357        warn_since: None,
23358        deny_since: None,
23359    },
23360    Lint {
23361        label: "clippy::writeln_empty_string",
23362        description: r##"This lint warns when you use `writeln!(buf, )` to
23363print a newline."##,
23364        default_severity: Severity::Allow,
23365        warn_since: None,
23366        deny_since: None,
23367    },
23368    Lint {
23369        label: "clippy::wrong_pub_self_convention",
23370        description: r##"Nothing. This lint has been deprecated"##,
23371        default_severity: Severity::Allow,
23372        warn_since: None,
23373        deny_since: None,
23374    },
23375    Lint {
23376        label: "clippy::wrong_self_convention",
23377        description: r##"Checks for methods with certain name prefixes or suffixes, and which
23378do not adhere to standard conventions regarding how `self` is taken.
23379The actual rules are:
23380
23381|Prefix |Postfix     |`self` taken                   | `self` type  |
23382|-------|------------|-------------------------------|--------------|
23383|`as_`  | none       |`&self` or `&mut self`         | any          |
23384|`from_`| none       | none                          | any          |
23385|`into_`| none       |`self`                         | any          |
23386|`is_`  | none       |`&mut self` or `&self` or none | any          |
23387|`to_`  | `_mut`     |`&mut self`                    | any          |
23388|`to_`  | not `_mut` |`self`                         | `Copy`       |
23389|`to_`  | not `_mut` |`&self`                        | not `Copy`   |
23390
23391Note: Clippy doesn't trigger methods with `to_` prefix in:
23392- Traits definition.
23393Clippy can not tell if a type that implements a trait is `Copy` or not.
23394- Traits implementation, when `&self` is taken.
23395The method signature is controlled by the trait and often `&self` is required for all types that implement the trait
23396(see e.g. the `std::string::ToString` trait).
23397
23398Clippy allows `Pin<&Self>` and `Pin<&mut Self>` if `&self` and `&mut self` is required.
23399
23400Please find more info here:
23401https://rust-lang.github.io/api-guidelines/naming.html#ad-hoc-conversions-follow-as_-to_-into_-conventions-c-conv"##,
23402        default_severity: Severity::Allow,
23403        warn_since: None,
23404        deny_since: None,
23405    },
23406    Lint {
23407        label: "clippy::wrong_transmute",
23408        description: r##"Checks for transmutes that can't ever be correct on any
23409architecture."##,
23410        default_severity: Severity::Allow,
23411        warn_since: None,
23412        deny_since: None,
23413    },
23414    Lint {
23415        label: "clippy::zero_divided_by_zero",
23416        description: r##"Checks for `0.0 / 0.0`."##,
23417        default_severity: Severity::Allow,
23418        warn_since: None,
23419        deny_since: None,
23420    },
23421    Lint {
23422        label: "clippy::zero_prefixed_literal",
23423        description: r##"Warns if an integral constant literal starts with `0`."##,
23424        default_severity: Severity::Allow,
23425        warn_since: None,
23426        deny_since: None,
23427    },
23428    Lint {
23429        label: "clippy::zero_ptr",
23430        description: r##"Catch casts from `0` to some pointer type"##,
23431        default_severity: Severity::Allow,
23432        warn_since: None,
23433        deny_since: None,
23434    },
23435    Lint {
23436        label: "clippy::zero_repeat_side_effects",
23437        description: r##"Checks for array or vec initializations which call a function or method,
23438but which have a repeat count of zero."##,
23439        default_severity: Severity::Allow,
23440        warn_since: None,
23441        deny_since: None,
23442    },
23443    Lint {
23444        label: "clippy::zero_sized_map_values",
23445        description: r##"Checks for maps with zero-sized value types anywhere in the code."##,
23446        default_severity: Severity::Allow,
23447        warn_since: None,
23448        deny_since: None,
23449    },
23450    Lint {
23451        label: "clippy::zombie_processes",
23452        description: r##"Looks for code that spawns a process but never calls `wait()` on the child."##,
23453        default_severity: Severity::Allow,
23454        warn_since: None,
23455        deny_since: None,
23456    },
23457    Lint {
23458        label: "clippy::zst_offset",
23459        description: r##"Checks for `offset(_)`, `wrapping_`{`add`, `sub`}, etc. on raw pointers to
23460zero-sized types"##,
23461        default_severity: Severity::Allow,
23462        warn_since: None,
23463        deny_since: None,
23464    },
23465];
23466pub const CLIPPY_LINT_GROUPS: &[LintGroup] = &[
23467    LintGroup {
23468        lint: Lint {
23469            label: "clippy::cargo",
23470            description: r##"lint group for: clippy::cargo_common_metadata, clippy::multiple_crate_versions, clippy::negative_feature_names, clippy::redundant_feature_names, clippy::wildcard_dependencies"##,
23471            default_severity: Severity::Allow,
23472            warn_since: None,
23473            deny_since: None,
23474        },
23475        children: &[
23476            "clippy::cargo_common_metadata",
23477            "clippy::multiple_crate_versions",
23478            "clippy::negative_feature_names",
23479            "clippy::redundant_feature_names",
23480            "clippy::wildcard_dependencies",
23481        ],
23482    },
23483    LintGroup {
23484        lint: Lint {
23485            label: "clippy::complexity",
23486            description: r##"lint group for: clippy::bind_instead_of_map, clippy::bool_comparison, clippy::borrow_deref_ref, clippy::borrowed_box, clippy::bytes_count_to_len, clippy::char_lit_as_u8, clippy::clone_on_copy, clippy::crosspointer_transmute, clippy::default_constructed_unit_structs, clippy::deprecated_cfg_attr, clippy::deref_addrof, clippy::derivable_impls, clippy::diverging_sub_expression, clippy::double_comparisons, clippy::double_parens, clippy::duration_subsec, clippy::excessive_nesting, clippy::explicit_auto_deref, clippy::explicit_counter_loop, clippy::explicit_write, clippy::extra_unused_lifetimes, clippy::extra_unused_type_parameters, clippy::filter_map_identity, clippy::filter_next, clippy::flat_map_identity, clippy::get_last_with_len, clippy::identity_op, clippy::implied_bounds_in_impls, clippy::inspect_for_each, clippy::int_plus_one, clippy::iter_count, clippy::iter_kv_map, clippy::let_with_type_underscore, clippy::manual_c_str_literals, clippy::manual_clamp, clippy::manual_div_ceil, clippy::manual_filter, clippy::manual_filter_map, clippy::manual_find, clippy::manual_find_map, clippy::manual_flatten, clippy::manual_hash_one, clippy::manual_inspect, clippy::manual_is_power_of_two, clippy::manual_main_separator_str, clippy::manual_range_patterns, clippy::manual_rem_euclid, clippy::manual_slice_size_calculation, clippy::manual_split_once, clippy::manual_strip, clippy::manual_swap, clippy::manual_unwrap_or, clippy::map_flatten, clippy::map_identity, clippy::match_as_ref, clippy::match_single_binding, clippy::needless_arbitrary_self_type, clippy::needless_bool, clippy::needless_bool_assign, clippy::needless_borrowed_reference, clippy::needless_if, clippy::needless_lifetimes, clippy::needless_match, clippy::needless_option_as_deref, clippy::needless_option_take, clippy::needless_question_mark, clippy::needless_splitn, clippy::needless_update, clippy::neg_cmp_op_on_partial_ord, clippy::no_effect, clippy::nonminimal_bool, clippy::only_used_in_recursion, clippy::option_as_ref_deref, clippy::option_filter_map, clippy::option_map_unit_fn, clippy::or_then_unwrap, clippy::partialeq_ne_impl, clippy::precedence, clippy::ptr_offset_with_cast, clippy::range_zip_with_len, clippy::redundant_as_str, clippy::redundant_async_block, clippy::redundant_at_rest_pattern, clippy::redundant_closure_call, clippy::redundant_guards, clippy::redundant_slicing, clippy::repeat_once, clippy::reserve_after_initialization, clippy::result_filter_map, clippy::result_map_unit_fn, clippy::search_is_some, clippy::seek_from_current, clippy::seek_to_start_instead_of_rewind, clippy::short_circuit_statement, clippy::single_element_loop, clippy::skip_while_next, clippy::string_from_utf8_as_bytes, clippy::strlen_on_c_strings, clippy::temporary_assignment, clippy::too_many_arguments, clippy::transmute_bytes_to_str, clippy::transmute_float_to_int, clippy::transmute_int_to_bool, clippy::transmute_int_to_char, clippy::transmute_int_to_float, clippy::transmute_int_to_non_zero, clippy::transmute_num_to_bytes, clippy::transmute_ptr_to_ref, clippy::transmutes_expressible_as_ptr_casts, clippy::type_complexity, clippy::unit_arg, clippy::unnecessary_cast, clippy::unnecessary_filter_map, clippy::unnecessary_find_map, clippy::unnecessary_first_then_check, clippy::unnecessary_literal_unwrap, clippy::unnecessary_map_on_constructor, clippy::unnecessary_min_or_max, clippy::unnecessary_operation, clippy::unnecessary_sort_by, clippy::unnecessary_unwrap, clippy::unneeded_wildcard_pattern, clippy::unused_format_specs, clippy::useless_asref, clippy::useless_conversion, clippy::useless_format, clippy::useless_transmute, clippy::vec_box, clippy::while_let_loop, clippy::wildcard_in_or_patterns, clippy::zero_divided_by_zero, clippy::zero_prefixed_literal"##,
23487            default_severity: Severity::Allow,
23488            warn_since: None,
23489            deny_since: None,
23490        },
23491        children: &[
23492            "clippy::bind_instead_of_map",
23493            "clippy::bool_comparison",
23494            "clippy::borrow_deref_ref",
23495            "clippy::borrowed_box",
23496            "clippy::bytes_count_to_len",
23497            "clippy::char_lit_as_u8",
23498            "clippy::clone_on_copy",
23499            "clippy::crosspointer_transmute",
23500            "clippy::default_constructed_unit_structs",
23501            "clippy::deprecated_cfg_attr",
23502            "clippy::deref_addrof",
23503            "clippy::derivable_impls",
23504            "clippy::diverging_sub_expression",
23505            "clippy::double_comparisons",
23506            "clippy::double_parens",
23507            "clippy::duration_subsec",
23508            "clippy::excessive_nesting",
23509            "clippy::explicit_auto_deref",
23510            "clippy::explicit_counter_loop",
23511            "clippy::explicit_write",
23512            "clippy::extra_unused_lifetimes",
23513            "clippy::extra_unused_type_parameters",
23514            "clippy::filter_map_identity",
23515            "clippy::filter_next",
23516            "clippy::flat_map_identity",
23517            "clippy::get_last_with_len",
23518            "clippy::identity_op",
23519            "clippy::implied_bounds_in_impls",
23520            "clippy::inspect_for_each",
23521            "clippy::int_plus_one",
23522            "clippy::iter_count",
23523            "clippy::iter_kv_map",
23524            "clippy::let_with_type_underscore",
23525            "clippy::manual_c_str_literals",
23526            "clippy::manual_clamp",
23527            "clippy::manual_div_ceil",
23528            "clippy::manual_filter",
23529            "clippy::manual_filter_map",
23530            "clippy::manual_find",
23531            "clippy::manual_find_map",
23532            "clippy::manual_flatten",
23533            "clippy::manual_hash_one",
23534            "clippy::manual_inspect",
23535            "clippy::manual_is_power_of_two",
23536            "clippy::manual_main_separator_str",
23537            "clippy::manual_range_patterns",
23538            "clippy::manual_rem_euclid",
23539            "clippy::manual_slice_size_calculation",
23540            "clippy::manual_split_once",
23541            "clippy::manual_strip",
23542            "clippy::manual_swap",
23543            "clippy::manual_unwrap_or",
23544            "clippy::map_flatten",
23545            "clippy::map_identity",
23546            "clippy::match_as_ref",
23547            "clippy::match_single_binding",
23548            "clippy::needless_arbitrary_self_type",
23549            "clippy::needless_bool",
23550            "clippy::needless_bool_assign",
23551            "clippy::needless_borrowed_reference",
23552            "clippy::needless_if",
23553            "clippy::needless_lifetimes",
23554            "clippy::needless_match",
23555            "clippy::needless_option_as_deref",
23556            "clippy::needless_option_take",
23557            "clippy::needless_question_mark",
23558            "clippy::needless_splitn",
23559            "clippy::needless_update",
23560            "clippy::neg_cmp_op_on_partial_ord",
23561            "clippy::no_effect",
23562            "clippy::nonminimal_bool",
23563            "clippy::only_used_in_recursion",
23564            "clippy::option_as_ref_deref",
23565            "clippy::option_filter_map",
23566            "clippy::option_map_unit_fn",
23567            "clippy::or_then_unwrap",
23568            "clippy::partialeq_ne_impl",
23569            "clippy::precedence",
23570            "clippy::ptr_offset_with_cast",
23571            "clippy::range_zip_with_len",
23572            "clippy::redundant_as_str",
23573            "clippy::redundant_async_block",
23574            "clippy::redundant_at_rest_pattern",
23575            "clippy::redundant_closure_call",
23576            "clippy::redundant_guards",
23577            "clippy::redundant_slicing",
23578            "clippy::repeat_once",
23579            "clippy::reserve_after_initialization",
23580            "clippy::result_filter_map",
23581            "clippy::result_map_unit_fn",
23582            "clippy::search_is_some",
23583            "clippy::seek_from_current",
23584            "clippy::seek_to_start_instead_of_rewind",
23585            "clippy::short_circuit_statement",
23586            "clippy::single_element_loop",
23587            "clippy::skip_while_next",
23588            "clippy::string_from_utf8_as_bytes",
23589            "clippy::strlen_on_c_strings",
23590            "clippy::temporary_assignment",
23591            "clippy::too_many_arguments",
23592            "clippy::transmute_bytes_to_str",
23593            "clippy::transmute_float_to_int",
23594            "clippy::transmute_int_to_bool",
23595            "clippy::transmute_int_to_char",
23596            "clippy::transmute_int_to_float",
23597            "clippy::transmute_int_to_non_zero",
23598            "clippy::transmute_num_to_bytes",
23599            "clippy::transmute_ptr_to_ref",
23600            "clippy::transmutes_expressible_as_ptr_casts",
23601            "clippy::type_complexity",
23602            "clippy::unit_arg",
23603            "clippy::unnecessary_cast",
23604            "clippy::unnecessary_filter_map",
23605            "clippy::unnecessary_find_map",
23606            "clippy::unnecessary_first_then_check",
23607            "clippy::unnecessary_literal_unwrap",
23608            "clippy::unnecessary_map_on_constructor",
23609            "clippy::unnecessary_min_or_max",
23610            "clippy::unnecessary_operation",
23611            "clippy::unnecessary_sort_by",
23612            "clippy::unnecessary_unwrap",
23613            "clippy::unneeded_wildcard_pattern",
23614            "clippy::unused_format_specs",
23615            "clippy::useless_asref",
23616            "clippy::useless_conversion",
23617            "clippy::useless_format",
23618            "clippy::useless_transmute",
23619            "clippy::vec_box",
23620            "clippy::while_let_loop",
23621            "clippy::wildcard_in_or_patterns",
23622            "clippy::zero_divided_by_zero",
23623            "clippy::zero_prefixed_literal",
23624        ],
23625    },
23626    LintGroup {
23627        lint: Lint {
23628            label: "clippy::correctness",
23629            description: r##"lint group for: clippy::absurd_extreme_comparisons, clippy::almost_swapped, clippy::approx_constant, clippy::async_yields_async, clippy::bad_bit_mask, clippy::cast_slice_different_sizes, clippy::deprecated_semver, clippy::derive_ord_xor_partial_ord, clippy::derived_hash_with_manual_eq, clippy::eager_transmute, clippy::enum_clike_unportable_variant, clippy::eq_op, clippy::erasing_op, clippy::fn_address_comparisons, clippy::if_let_mutex, clippy::ifs_same_cond, clippy::impl_hash_borrow_with_str_and_bytes, clippy::impossible_comparisons, clippy::ineffective_bit_mask, clippy::infinite_iter, clippy::inherent_to_string_shadow_display, clippy::inline_fn_without_body, clippy::invalid_null_ptr_usage, clippy::invalid_regex, clippy::inverted_saturating_sub, clippy::invisible_characters, clippy::iter_next_loop, clippy::iter_skip_zero, clippy::iterator_step_by_zero, clippy::let_underscore_lock, clippy::lint_groups_priority, clippy::match_str_case_mismatch, clippy::mem_replace_with_uninit, clippy::min_max, clippy::mistyped_literal_suffixes, clippy::modulo_one, clippy::mut_from_ref, clippy::never_loop, clippy::non_octal_unix_permissions, clippy::nonsensical_open_options, clippy::not_unsafe_ptr_arg_deref, clippy::option_env_unwrap, clippy::out_of_bounds_indexing, clippy::overly_complex_bool_expr, clippy::panicking_overflow_checks, clippy::panicking_unwrap, clippy::possible_missing_comma, clippy::read_line_without_trim, clippy::recursive_format_impl, clippy::redundant_comparisons, clippy::redundant_locals, clippy::reversed_empty_ranges, clippy::self_assignment, clippy::serde_api_misuse, clippy::size_of_in_element_count, clippy::suspicious_splitn, clippy::transmute_null_to_fn, clippy::transmuting_null, clippy::uninit_assumed_init, clippy::uninit_vec, clippy::unit_cmp, clippy::unit_hash, clippy::unit_return_expecting_ord, clippy::unsound_collection_transmute, clippy::unused_io_amount, clippy::useless_attribute, clippy::vec_resize_to_zero, clippy::while_immutable_condition, clippy::wrong_transmute, clippy::zst_offset"##,
23630            default_severity: Severity::Allow,
23631            warn_since: None,
23632            deny_since: None,
23633        },
23634        children: &[
23635            "clippy::absurd_extreme_comparisons",
23636            "clippy::almost_swapped",
23637            "clippy::approx_constant",
23638            "clippy::async_yields_async",
23639            "clippy::bad_bit_mask",
23640            "clippy::cast_slice_different_sizes",
23641            "clippy::deprecated_semver",
23642            "clippy::derive_ord_xor_partial_ord",
23643            "clippy::derived_hash_with_manual_eq",
23644            "clippy::eager_transmute",
23645            "clippy::enum_clike_unportable_variant",
23646            "clippy::eq_op",
23647            "clippy::erasing_op",
23648            "clippy::fn_address_comparisons",
23649            "clippy::if_let_mutex",
23650            "clippy::ifs_same_cond",
23651            "clippy::impl_hash_borrow_with_str_and_bytes",
23652            "clippy::impossible_comparisons",
23653            "clippy::ineffective_bit_mask",
23654            "clippy::infinite_iter",
23655            "clippy::inherent_to_string_shadow_display",
23656            "clippy::inline_fn_without_body",
23657            "clippy::invalid_null_ptr_usage",
23658            "clippy::invalid_regex",
23659            "clippy::inverted_saturating_sub",
23660            "clippy::invisible_characters",
23661            "clippy::iter_next_loop",
23662            "clippy::iter_skip_zero",
23663            "clippy::iterator_step_by_zero",
23664            "clippy::let_underscore_lock",
23665            "clippy::lint_groups_priority",
23666            "clippy::match_str_case_mismatch",
23667            "clippy::mem_replace_with_uninit",
23668            "clippy::min_max",
23669            "clippy::mistyped_literal_suffixes",
23670            "clippy::modulo_one",
23671            "clippy::mut_from_ref",
23672            "clippy::never_loop",
23673            "clippy::non_octal_unix_permissions",
23674            "clippy::nonsensical_open_options",
23675            "clippy::not_unsafe_ptr_arg_deref",
23676            "clippy::option_env_unwrap",
23677            "clippy::out_of_bounds_indexing",
23678            "clippy::overly_complex_bool_expr",
23679            "clippy::panicking_overflow_checks",
23680            "clippy::panicking_unwrap",
23681            "clippy::possible_missing_comma",
23682            "clippy::read_line_without_trim",
23683            "clippy::recursive_format_impl",
23684            "clippy::redundant_comparisons",
23685            "clippy::redundant_locals",
23686            "clippy::reversed_empty_ranges",
23687            "clippy::self_assignment",
23688            "clippy::serde_api_misuse",
23689            "clippy::size_of_in_element_count",
23690            "clippy::suspicious_splitn",
23691            "clippy::transmute_null_to_fn",
23692            "clippy::transmuting_null",
23693            "clippy::uninit_assumed_init",
23694            "clippy::uninit_vec",
23695            "clippy::unit_cmp",
23696            "clippy::unit_hash",
23697            "clippy::unit_return_expecting_ord",
23698            "clippy::unsound_collection_transmute",
23699            "clippy::unused_io_amount",
23700            "clippy::useless_attribute",
23701            "clippy::vec_resize_to_zero",
23702            "clippy::while_immutable_condition",
23703            "clippy::wrong_transmute",
23704            "clippy::zst_offset",
23705        ],
23706    },
23707    LintGroup {
23708        lint: Lint {
23709            label: "clippy::deprecated",
23710            description: r##"lint group for: clippy::assign_ops, clippy::extend_from_slice, clippy::misaligned_transmute, clippy::pub_enum_variant_names, clippy::range_step_by_zero, clippy::regex_macro, clippy::replace_consts, clippy::should_assert_eq, clippy::unsafe_vector_initialization, clippy::unstable_as_mut_slice, clippy::unstable_as_slice, clippy::unused_collect, clippy::wrong_pub_self_convention"##,
23711            default_severity: Severity::Allow,
23712            warn_since: None,
23713            deny_since: None,
23714        },
23715        children: &[
23716            "clippy::assign_ops",
23717            "clippy::extend_from_slice",
23718            "clippy::misaligned_transmute",
23719            "clippy::pub_enum_variant_names",
23720            "clippy::range_step_by_zero",
23721            "clippy::regex_macro",
23722            "clippy::replace_consts",
23723            "clippy::should_assert_eq",
23724            "clippy::unsafe_vector_initialization",
23725            "clippy::unstable_as_mut_slice",
23726            "clippy::unstable_as_slice",
23727            "clippy::unused_collect",
23728            "clippy::wrong_pub_self_convention",
23729        ],
23730    },
23731    LintGroup {
23732        lint: Lint {
23733            label: "clippy::nursery",
23734            description: r##"lint group for: clippy::as_ptr_cast_mut, clippy::branches_sharing_code, clippy::clear_with_drain, clippy::cognitive_complexity, clippy::collection_is_never_read, clippy::debug_assert_with_mut_call, clippy::derive_partial_eq_without_eq, clippy::equatable_if_let, clippy::fallible_impl_from, clippy::future_not_send, clippy::imprecise_flops, clippy::iter_on_empty_collections, clippy::iter_on_single_items, clippy::iter_with_drain, clippy::large_stack_frames, clippy::missing_const_for_fn, clippy::mutex_integer, clippy::needless_collect, clippy::needless_pass_by_ref_mut, clippy::non_send_fields_in_send_ty, clippy::nonstandard_macro_braces, clippy::option_if_let_else, clippy::or_fun_call, clippy::path_buf_push_overwrite, clippy::read_zero_byte_vec, clippy::redundant_clone, clippy::redundant_pub_crate, clippy::set_contains_or_insert, clippy::significant_drop_in_scrutinee, clippy::significant_drop_tightening, clippy::string_lit_as_bytes, clippy::suboptimal_flops, clippy::suspicious_operation_groupings, clippy::trailing_empty_array, clippy::trait_duplication_in_bounds, clippy::transmute_undefined_repr, clippy::trivial_regex, clippy::tuple_array_conversions, clippy::type_repetition_in_bounds, clippy::uninhabited_references, clippy::unnecessary_struct_initialization, clippy::unused_peekable, clippy::unused_rounding, clippy::use_self, clippy::useless_let_if_seq, clippy::while_float"##,
23735            default_severity: Severity::Allow,
23736            warn_since: None,
23737            deny_since: None,
23738        },
23739        children: &[
23740            "clippy::as_ptr_cast_mut",
23741            "clippy::branches_sharing_code",
23742            "clippy::clear_with_drain",
23743            "clippy::cognitive_complexity",
23744            "clippy::collection_is_never_read",
23745            "clippy::debug_assert_with_mut_call",
23746            "clippy::derive_partial_eq_without_eq",
23747            "clippy::equatable_if_let",
23748            "clippy::fallible_impl_from",
23749            "clippy::future_not_send",
23750            "clippy::imprecise_flops",
23751            "clippy::iter_on_empty_collections",
23752            "clippy::iter_on_single_items",
23753            "clippy::iter_with_drain",
23754            "clippy::large_stack_frames",
23755            "clippy::missing_const_for_fn",
23756            "clippy::mutex_integer",
23757            "clippy::needless_collect",
23758            "clippy::needless_pass_by_ref_mut",
23759            "clippy::non_send_fields_in_send_ty",
23760            "clippy::nonstandard_macro_braces",
23761            "clippy::option_if_let_else",
23762            "clippy::or_fun_call",
23763            "clippy::path_buf_push_overwrite",
23764            "clippy::read_zero_byte_vec",
23765            "clippy::redundant_clone",
23766            "clippy::redundant_pub_crate",
23767            "clippy::set_contains_or_insert",
23768            "clippy::significant_drop_in_scrutinee",
23769            "clippy::significant_drop_tightening",
23770            "clippy::string_lit_as_bytes",
23771            "clippy::suboptimal_flops",
23772            "clippy::suspicious_operation_groupings",
23773            "clippy::trailing_empty_array",
23774            "clippy::trait_duplication_in_bounds",
23775            "clippy::transmute_undefined_repr",
23776            "clippy::trivial_regex",
23777            "clippy::tuple_array_conversions",
23778            "clippy::type_repetition_in_bounds",
23779            "clippy::uninhabited_references",
23780            "clippy::unnecessary_struct_initialization",
23781            "clippy::unused_peekable",
23782            "clippy::unused_rounding",
23783            "clippy::use_self",
23784            "clippy::useless_let_if_seq",
23785            "clippy::while_float",
23786        ],
23787    },
23788    LintGroup {
23789        lint: Lint {
23790            label: "clippy::pedantic",
23791            description: r##"lint group for: clippy::assigning_clones, clippy::bool_to_int_with_if, clippy::borrow_as_ptr, clippy::case_sensitive_file_extension_comparisons, clippy::cast_lossless, clippy::cast_possible_truncation, clippy::cast_possible_wrap, clippy::cast_precision_loss, clippy::cast_ptr_alignment, clippy::cast_sign_loss, clippy::checked_conversions, clippy::cloned_instead_of_copied, clippy::copy_iterator, clippy::default_trait_access, clippy::doc_link_with_quotes, clippy::doc_markdown, clippy::empty_enum, clippy::enum_glob_use, clippy::expl_impl_clone_on_copy, clippy::explicit_deref_methods, clippy::explicit_into_iter_loop, clippy::explicit_iter_loop, clippy::filter_map_next, clippy::flat_map_option, clippy::float_cmp, clippy::fn_params_excessive_bools, clippy::from_iter_instead_of_collect, clippy::if_not_else, clippy::ignored_unit_patterns, clippy::implicit_clone, clippy::implicit_hasher, clippy::inconsistent_struct_constructor, clippy::index_refutable_slice, clippy::inefficient_to_string, clippy::inline_always, clippy::into_iter_without_iter, clippy::invalid_upcast_comparisons, clippy::items_after_statements, clippy::iter_filter_is_ok, clippy::iter_filter_is_some, clippy::iter_not_returning_iterator, clippy::iter_without_into_iter, clippy::large_digit_groups, clippy::large_futures, clippy::large_stack_arrays, clippy::large_types_passed_by_value, clippy::linkedlist, clippy::macro_use_imports, clippy::manual_assert, clippy::manual_instant_elapsed, clippy::manual_is_variant_and, clippy::manual_let_else, clippy::manual_ok_or, clippy::manual_string_new, clippy::many_single_char_names, clippy::map_unwrap_or, clippy::match_bool, clippy::match_on_vec_items, clippy::match_same_arms, clippy::match_wild_err_arm, clippy::match_wildcard_for_single_variants, clippy::maybe_infinite_iter, clippy::mismatching_type_param_order, clippy::missing_errors_doc, clippy::missing_fields_in_debug, clippy::missing_panics_doc, clippy::module_name_repetitions, clippy::must_use_candidate, clippy::mut_mut, clippy::naive_bytecount, clippy::needless_bitwise_bool, clippy::needless_continue, clippy::needless_for_each, clippy::needless_pass_by_value, clippy::needless_raw_string_hashes, clippy::no_effect_underscore_binding, clippy::no_mangle_with_rust_abi, clippy::option_as_ref_cloned, clippy::option_option, clippy::ptr_as_ptr, clippy::ptr_cast_constness, clippy::pub_underscore_fields, clippy::range_minus_one, clippy::range_plus_one, clippy::redundant_closure_for_method_calls, clippy::redundant_else, clippy::ref_as_ptr, clippy::ref_binding_to_reference, clippy::ref_option, clippy::ref_option_ref, clippy::return_self_not_must_use, clippy::same_functions_in_if_condition, clippy::semicolon_if_nothing_returned, clippy::should_panic_without_expect, clippy::similar_names, clippy::single_char_pattern, clippy::single_match_else, clippy::stable_sort_primitive, clippy::str_split_at_newline, clippy::string_add_assign, clippy::struct_excessive_bools, clippy::struct_field_names, clippy::too_many_lines, clippy::transmute_ptr_to_ptr, clippy::trivially_copy_pass_by_ref, clippy::unchecked_duration_subtraction, clippy::unicode_not_nfc, clippy::uninlined_format_args, clippy::unnecessary_box_returns, clippy::unnecessary_join, clippy::unnecessary_wraps, clippy::unnested_or_patterns, clippy::unreadable_literal, clippy::unsafe_derive_deserialize, clippy::unused_async, clippy::unused_self, clippy::used_underscore_binding, clippy::used_underscore_items, clippy::verbose_bit_mask, clippy::wildcard_imports, clippy::zero_sized_map_values"##,
23792            default_severity: Severity::Allow,
23793            warn_since: None,
23794            deny_since: None,
23795        },
23796        children: &[
23797            "clippy::assigning_clones",
23798            "clippy::bool_to_int_with_if",
23799            "clippy::borrow_as_ptr",
23800            "clippy::case_sensitive_file_extension_comparisons",
23801            "clippy::cast_lossless",
23802            "clippy::cast_possible_truncation",
23803            "clippy::cast_possible_wrap",
23804            "clippy::cast_precision_loss",
23805            "clippy::cast_ptr_alignment",
23806            "clippy::cast_sign_loss",
23807            "clippy::checked_conversions",
23808            "clippy::cloned_instead_of_copied",
23809            "clippy::copy_iterator",
23810            "clippy::default_trait_access",
23811            "clippy::doc_link_with_quotes",
23812            "clippy::doc_markdown",
23813            "clippy::empty_enum",
23814            "clippy::enum_glob_use",
23815            "clippy::expl_impl_clone_on_copy",
23816            "clippy::explicit_deref_methods",
23817            "clippy::explicit_into_iter_loop",
23818            "clippy::explicit_iter_loop",
23819            "clippy::filter_map_next",
23820            "clippy::flat_map_option",
23821            "clippy::float_cmp",
23822            "clippy::fn_params_excessive_bools",
23823            "clippy::from_iter_instead_of_collect",
23824            "clippy::if_not_else",
23825            "clippy::ignored_unit_patterns",
23826            "clippy::implicit_clone",
23827            "clippy::implicit_hasher",
23828            "clippy::inconsistent_struct_constructor",
23829            "clippy::index_refutable_slice",
23830            "clippy::inefficient_to_string",
23831            "clippy::inline_always",
23832            "clippy::into_iter_without_iter",
23833            "clippy::invalid_upcast_comparisons",
23834            "clippy::items_after_statements",
23835            "clippy::iter_filter_is_ok",
23836            "clippy::iter_filter_is_some",
23837            "clippy::iter_not_returning_iterator",
23838            "clippy::iter_without_into_iter",
23839            "clippy::large_digit_groups",
23840            "clippy::large_futures",
23841            "clippy::large_stack_arrays",
23842            "clippy::large_types_passed_by_value",
23843            "clippy::linkedlist",
23844            "clippy::macro_use_imports",
23845            "clippy::manual_assert",
23846            "clippy::manual_instant_elapsed",
23847            "clippy::manual_is_variant_and",
23848            "clippy::manual_let_else",
23849            "clippy::manual_ok_or",
23850            "clippy::manual_string_new",
23851            "clippy::many_single_char_names",
23852            "clippy::map_unwrap_or",
23853            "clippy::match_bool",
23854            "clippy::match_on_vec_items",
23855            "clippy::match_same_arms",
23856            "clippy::match_wild_err_arm",
23857            "clippy::match_wildcard_for_single_variants",
23858            "clippy::maybe_infinite_iter",
23859            "clippy::mismatching_type_param_order",
23860            "clippy::missing_errors_doc",
23861            "clippy::missing_fields_in_debug",
23862            "clippy::missing_panics_doc",
23863            "clippy::module_name_repetitions",
23864            "clippy::must_use_candidate",
23865            "clippy::mut_mut",
23866            "clippy::naive_bytecount",
23867            "clippy::needless_bitwise_bool",
23868            "clippy::needless_continue",
23869            "clippy::needless_for_each",
23870            "clippy::needless_pass_by_value",
23871            "clippy::needless_raw_string_hashes",
23872            "clippy::no_effect_underscore_binding",
23873            "clippy::no_mangle_with_rust_abi",
23874            "clippy::option_as_ref_cloned",
23875            "clippy::option_option",
23876            "clippy::ptr_as_ptr",
23877            "clippy::ptr_cast_constness",
23878            "clippy::pub_underscore_fields",
23879            "clippy::range_minus_one",
23880            "clippy::range_plus_one",
23881            "clippy::redundant_closure_for_method_calls",
23882            "clippy::redundant_else",
23883            "clippy::ref_as_ptr",
23884            "clippy::ref_binding_to_reference",
23885            "clippy::ref_option",
23886            "clippy::ref_option_ref",
23887            "clippy::return_self_not_must_use",
23888            "clippy::same_functions_in_if_condition",
23889            "clippy::semicolon_if_nothing_returned",
23890            "clippy::should_panic_without_expect",
23891            "clippy::similar_names",
23892            "clippy::single_char_pattern",
23893            "clippy::single_match_else",
23894            "clippy::stable_sort_primitive",
23895            "clippy::str_split_at_newline",
23896            "clippy::string_add_assign",
23897            "clippy::struct_excessive_bools",
23898            "clippy::struct_field_names",
23899            "clippy::too_many_lines",
23900            "clippy::transmute_ptr_to_ptr",
23901            "clippy::trivially_copy_pass_by_ref",
23902            "clippy::unchecked_duration_subtraction",
23903            "clippy::unicode_not_nfc",
23904            "clippy::uninlined_format_args",
23905            "clippy::unnecessary_box_returns",
23906            "clippy::unnecessary_join",
23907            "clippy::unnecessary_wraps",
23908            "clippy::unnested_or_patterns",
23909            "clippy::unreadable_literal",
23910            "clippy::unsafe_derive_deserialize",
23911            "clippy::unused_async",
23912            "clippy::unused_self",
23913            "clippy::used_underscore_binding",
23914            "clippy::used_underscore_items",
23915            "clippy::verbose_bit_mask",
23916            "clippy::wildcard_imports",
23917            "clippy::zero_sized_map_values",
23918        ],
23919    },
23920    LintGroup {
23921        lint: Lint {
23922            label: "clippy::perf",
23923            description: r##"lint group for: clippy::box_collection, clippy::boxed_local, clippy::cmp_owned, clippy::collapsible_str_replace, clippy::drain_collect, clippy::expect_fun_call, clippy::extend_with_drain, clippy::format_collect, clippy::format_in_format_args, clippy::iter_overeager_cloned, clippy::large_const_arrays, clippy::large_enum_variant, clippy::manual_memcpy, clippy::manual_retain, clippy::manual_str_repeat, clippy::manual_try_fold, clippy::map_entry, clippy::missing_const_for_thread_local, clippy::missing_spin_loop, clippy::readonly_write_lock, clippy::redundant_allocation, clippy::result_large_err, clippy::slow_vector_initialization, clippy::to_string_in_format_args, clippy::unnecessary_to_owned, clippy::useless_vec, clippy::vec_init_then_push, clippy::waker_clone_wake"##,
23924            default_severity: Severity::Allow,
23925            warn_since: None,
23926            deny_since: None,
23927        },
23928        children: &[
23929            "clippy::box_collection",
23930            "clippy::boxed_local",
23931            "clippy::cmp_owned",
23932            "clippy::collapsible_str_replace",
23933            "clippy::drain_collect",
23934            "clippy::expect_fun_call",
23935            "clippy::extend_with_drain",
23936            "clippy::format_collect",
23937            "clippy::format_in_format_args",
23938            "clippy::iter_overeager_cloned",
23939            "clippy::large_const_arrays",
23940            "clippy::large_enum_variant",
23941            "clippy::manual_memcpy",
23942            "clippy::manual_retain",
23943            "clippy::manual_str_repeat",
23944            "clippy::manual_try_fold",
23945            "clippy::map_entry",
23946            "clippy::missing_const_for_thread_local",
23947            "clippy::missing_spin_loop",
23948            "clippy::readonly_write_lock",
23949            "clippy::redundant_allocation",
23950            "clippy::result_large_err",
23951            "clippy::slow_vector_initialization",
23952            "clippy::to_string_in_format_args",
23953            "clippy::unnecessary_to_owned",
23954            "clippy::useless_vec",
23955            "clippy::vec_init_then_push",
23956            "clippy::waker_clone_wake",
23957        ],
23958    },
23959    LintGroup {
23960        lint: Lint {
23961            label: "clippy::restriction",
23962            description: r##"lint group for: clippy::absolute_paths, clippy::alloc_instead_of_core, clippy::allow_attributes, clippy::allow_attributes_without_reason, clippy::arithmetic_side_effects, clippy::as_conversions, clippy::as_underscore, clippy::assertions_on_result_states, clippy::big_endian_bytes, clippy::cfg_not_test, clippy::clone_on_ref_ptr, clippy::create_dir, clippy::dbg_macro, clippy::decimal_literal_representation, clippy::default_numeric_fallback, clippy::default_union_representation, clippy::deref_by_slicing, clippy::disallowed_script_idents, clippy::else_if_without_else, clippy::empty_drop, clippy::empty_enum_variants_with_brackets, clippy::empty_structs_with_brackets, clippy::error_impl_error, clippy::exhaustive_enums, clippy::exhaustive_structs, clippy::exit, clippy::expect_used, clippy::field_scoped_visibility_modifiers, clippy::filetype_is_file, clippy::float_arithmetic, clippy::float_cmp_const, clippy::fn_to_numeric_cast_any, clippy::format_push_string, clippy::get_unwrap, clippy::host_endian_bytes, clippy::if_then_some_else_none, clippy::impl_trait_in_params, clippy::implicit_return, clippy::indexing_slicing, clippy::infinite_loop, clippy::inline_asm_x86_att_syntax, clippy::inline_asm_x86_intel_syntax, clippy::integer_division, clippy::integer_division_remainder_used, clippy::iter_over_hash_type, clippy::large_include_file, clippy::let_underscore_must_use, clippy::let_underscore_untyped, clippy::little_endian_bytes, clippy::lossy_float_literal, clippy::map_err_ignore, clippy::mem_forget, clippy::min_ident_chars, clippy::missing_assert_message, clippy::missing_asserts_for_indexing, clippy::missing_docs_in_private_items, clippy::missing_inline_in_public_items, clippy::missing_trait_methods, clippy::mixed_read_write_in_expression, clippy::mod_module_files, clippy::modulo_arithmetic, clippy::multiple_inherent_impl, clippy::multiple_unsafe_ops_per_block, clippy::mutex_atomic, clippy::needless_raw_strings, clippy::non_ascii_literal, clippy::non_zero_suggestions, clippy::panic, clippy::panic_in_result_fn, clippy::partial_pub_fields, clippy::pathbuf_init_then_push, clippy::pattern_type_mismatch, clippy::print_stderr, clippy::print_stdout, clippy::pub_use, clippy::pub_with_shorthand, clippy::pub_without_shorthand, clippy::question_mark_used, clippy::rc_buffer, clippy::rc_mutex, clippy::redundant_type_annotations, clippy::ref_patterns, clippy::renamed_function_params, clippy::rest_pat_in_fully_bound_structs, clippy::same_name_method, clippy::self_named_module_files, clippy::semicolon_inside_block, clippy::semicolon_outside_block, clippy::separated_literal_suffix, clippy::shadow_reuse, clippy::shadow_same, clippy::shadow_unrelated, clippy::single_call_fn, clippy::single_char_lifetime_names, clippy::std_instead_of_alloc, clippy::std_instead_of_core, clippy::str_to_string, clippy::string_add, clippy::string_lit_chars_any, clippy::string_slice, clippy::string_to_string, clippy::suspicious_xor_used_as_pow, clippy::tests_outside_test_module, clippy::todo, clippy::try_err, clippy::undocumented_unsafe_blocks, clippy::unimplemented, clippy::unnecessary_safety_comment, clippy::unnecessary_safety_doc, clippy::unnecessary_self_imports, clippy::unneeded_field_pattern, clippy::unreachable, clippy::unseparated_literal_suffix, clippy::unused_result_ok, clippy::unused_trait_names, clippy::unwrap_in_result, clippy::unwrap_used, clippy::use_debug, clippy::verbose_file_reads, clippy::wildcard_enum_match_arm"##,
23963            default_severity: Severity::Allow,
23964            warn_since: None,
23965            deny_since: None,
23966        },
23967        children: &[
23968            "clippy::absolute_paths",
23969            "clippy::alloc_instead_of_core",
23970            "clippy::allow_attributes",
23971            "clippy::allow_attributes_without_reason",
23972            "clippy::arithmetic_side_effects",
23973            "clippy::as_conversions",
23974            "clippy::as_underscore",
23975            "clippy::assertions_on_result_states",
23976            "clippy::big_endian_bytes",
23977            "clippy::cfg_not_test",
23978            "clippy::clone_on_ref_ptr",
23979            "clippy::create_dir",
23980            "clippy::dbg_macro",
23981            "clippy::decimal_literal_representation",
23982            "clippy::default_numeric_fallback",
23983            "clippy::default_union_representation",
23984            "clippy::deref_by_slicing",
23985            "clippy::disallowed_script_idents",
23986            "clippy::else_if_without_else",
23987            "clippy::empty_drop",
23988            "clippy::empty_enum_variants_with_brackets",
23989            "clippy::empty_structs_with_brackets",
23990            "clippy::error_impl_error",
23991            "clippy::exhaustive_enums",
23992            "clippy::exhaustive_structs",
23993            "clippy::exit",
23994            "clippy::expect_used",
23995            "clippy::field_scoped_visibility_modifiers",
23996            "clippy::filetype_is_file",
23997            "clippy::float_arithmetic",
23998            "clippy::float_cmp_const",
23999            "clippy::fn_to_numeric_cast_any",
24000            "clippy::format_push_string",
24001            "clippy::get_unwrap",
24002            "clippy::host_endian_bytes",
24003            "clippy::if_then_some_else_none",
24004            "clippy::impl_trait_in_params",
24005            "clippy::implicit_return",
24006            "clippy::indexing_slicing",
24007            "clippy::infinite_loop",
24008            "clippy::inline_asm_x86_att_syntax",
24009            "clippy::inline_asm_x86_intel_syntax",
24010            "clippy::integer_division",
24011            "clippy::integer_division_remainder_used",
24012            "clippy::iter_over_hash_type",
24013            "clippy::large_include_file",
24014            "clippy::let_underscore_must_use",
24015            "clippy::let_underscore_untyped",
24016            "clippy::little_endian_bytes",
24017            "clippy::lossy_float_literal",
24018            "clippy::map_err_ignore",
24019            "clippy::mem_forget",
24020            "clippy::min_ident_chars",
24021            "clippy::missing_assert_message",
24022            "clippy::missing_asserts_for_indexing",
24023            "clippy::missing_docs_in_private_items",
24024            "clippy::missing_inline_in_public_items",
24025            "clippy::missing_trait_methods",
24026            "clippy::mixed_read_write_in_expression",
24027            "clippy::mod_module_files",
24028            "clippy::modulo_arithmetic",
24029            "clippy::multiple_inherent_impl",
24030            "clippy::multiple_unsafe_ops_per_block",
24031            "clippy::mutex_atomic",
24032            "clippy::needless_raw_strings",
24033            "clippy::non_ascii_literal",
24034            "clippy::non_zero_suggestions",
24035            "clippy::panic",
24036            "clippy::panic_in_result_fn",
24037            "clippy::partial_pub_fields",
24038            "clippy::pathbuf_init_then_push",
24039            "clippy::pattern_type_mismatch",
24040            "clippy::print_stderr",
24041            "clippy::print_stdout",
24042            "clippy::pub_use",
24043            "clippy::pub_with_shorthand",
24044            "clippy::pub_without_shorthand",
24045            "clippy::question_mark_used",
24046            "clippy::rc_buffer",
24047            "clippy::rc_mutex",
24048            "clippy::redundant_type_annotations",
24049            "clippy::ref_patterns",
24050            "clippy::renamed_function_params",
24051            "clippy::rest_pat_in_fully_bound_structs",
24052            "clippy::same_name_method",
24053            "clippy::self_named_module_files",
24054            "clippy::semicolon_inside_block",
24055            "clippy::semicolon_outside_block",
24056            "clippy::separated_literal_suffix",
24057            "clippy::shadow_reuse",
24058            "clippy::shadow_same",
24059            "clippy::shadow_unrelated",
24060            "clippy::single_call_fn",
24061            "clippy::single_char_lifetime_names",
24062            "clippy::std_instead_of_alloc",
24063            "clippy::std_instead_of_core",
24064            "clippy::str_to_string",
24065            "clippy::string_add",
24066            "clippy::string_lit_chars_any",
24067            "clippy::string_slice",
24068            "clippy::string_to_string",
24069            "clippy::suspicious_xor_used_as_pow",
24070            "clippy::tests_outside_test_module",
24071            "clippy::todo",
24072            "clippy::try_err",
24073            "clippy::undocumented_unsafe_blocks",
24074            "clippy::unimplemented",
24075            "clippy::unnecessary_safety_comment",
24076            "clippy::unnecessary_safety_doc",
24077            "clippy::unnecessary_self_imports",
24078            "clippy::unneeded_field_pattern",
24079            "clippy::unreachable",
24080            "clippy::unseparated_literal_suffix",
24081            "clippy::unused_result_ok",
24082            "clippy::unused_trait_names",
24083            "clippy::unwrap_in_result",
24084            "clippy::unwrap_used",
24085            "clippy::use_debug",
24086            "clippy::verbose_file_reads",
24087            "clippy::wildcard_enum_match_arm",
24088        ],
24089    },
24090    LintGroup {
24091        lint: Lint {
24092            label: "clippy::style",
24093            description: r##"lint group for: clippy::assertions_on_constants, clippy::assign_op_pattern, clippy::blocks_in_conditions, clippy::bool_assert_comparison, clippy::borrow_interior_mutable_const, clippy::box_default, clippy::builtin_type_shadow, clippy::byte_char_slices, clippy::bytes_nth, clippy::chars_last_cmp, clippy::chars_next_cmp, clippy::cmp_null, clippy::collapsible_else_if, clippy::collapsible_if, clippy::collapsible_match, clippy::comparison_chain, clippy::comparison_to_empty, clippy::declare_interior_mutable_const, clippy::default_instead_of_iter_empty, clippy::disallowed_macros, clippy::disallowed_methods, clippy::disallowed_names, clippy::disallowed_types, clippy::doc_lazy_continuation, clippy::double_must_use, clippy::double_neg, clippy::duplicate_underscore_argument, clippy::enum_variant_names, clippy::err_expect, clippy::excessive_precision, clippy::field_reassign_with_default, clippy::filter_map_bool_then, clippy::fn_to_numeric_cast, clippy::fn_to_numeric_cast_with_truncation, clippy::for_kv_map, clippy::from_over_into, clippy::from_str_radix_10, clippy::get_first, clippy::if_same_then_else, clippy::implicit_saturating_add, clippy::implicit_saturating_sub, clippy::inconsistent_digit_grouping, clippy::infallible_destructuring_match, clippy::inherent_to_string, clippy::init_numbered_fields, clippy::into_iter_on_ref, clippy::is_digit_ascii_radix, clippy::items_after_test_module, clippy::iter_cloned_collect, clippy::iter_next_slice, clippy::iter_nth, clippy::iter_nth_zero, clippy::iter_skip_next, clippy::just_underscores_and_digits, clippy::legacy_numeric_constants, clippy::len_without_is_empty, clippy::len_zero, clippy::let_and_return, clippy::let_unit_value, clippy::main_recursion, clippy::manual_async_fn, clippy::manual_bits, clippy::manual_is_ascii_check, clippy::manual_is_finite, clippy::manual_is_infinite, clippy::manual_map, clippy::manual_next_back, clippy::manual_non_exhaustive, clippy::manual_pattern_char_comparison, clippy::manual_range_contains, clippy::manual_rotate, clippy::manual_saturating_arithmetic, clippy::manual_while_let_some, clippy::map_clone, clippy::map_collect_result_unit, clippy::match_like_matches_macro, clippy::match_overlapping_arm, clippy::match_ref_pats, clippy::match_result_ok, clippy::mem_replace_option_with_none, clippy::mem_replace_with_default, clippy::missing_enforced_import_renames, clippy::missing_safety_doc, clippy::mixed_attributes_style, clippy::mixed_case_hex_literals, clippy::module_inception, clippy::must_use_unit, clippy::mut_mutex_lock, clippy::needless_borrow, clippy::needless_borrows_for_generic_args, clippy::needless_doctest_main, clippy::needless_else, clippy::needless_late_init, clippy::needless_parens_on_range_literals, clippy::needless_pub_self, clippy::needless_range_loop, clippy::needless_return, clippy::needless_return_with_question_mark, clippy::neg_multiply, clippy::new_ret_no_self, clippy::new_without_default, clippy::non_minimal_cfg, clippy::obfuscated_if_else, clippy::ok_expect, clippy::op_ref, clippy::option_map_or_err_ok, clippy::option_map_or_none, clippy::partialeq_to_none, clippy::print_literal, clippy::print_with_newline, clippy::println_empty_string, clippy::ptr_arg, clippy::ptr_eq, clippy::question_mark, clippy::redundant_closure, clippy::redundant_field_names, clippy::redundant_pattern, clippy::redundant_pattern_matching, clippy::redundant_static_lifetimes, clippy::result_map_or_into_option, clippy::result_unit_err, clippy::same_item_push, clippy::self_named_constructors, clippy::should_implement_trait, clippy::single_char_add_str, clippy::single_component_path_imports, clippy::single_match, clippy::string_extend_chars, clippy::tabs_in_doc_comments, clippy::to_digit_is_some, clippy::to_string_trait_impl, clippy::too_long_first_doc_paragraph, clippy::toplevel_ref_arg, clippy::trim_split_whitespace, clippy::unnecessary_fallible_conversions, clippy::unnecessary_fold, clippy::unnecessary_lazy_evaluations, clippy::unnecessary_mut_passed, clippy::unnecessary_owned_empty_strings, clippy::unsafe_removed_from_name, clippy::unused_enumerate_index, clippy::unused_unit, clippy::unusual_byte_groupings, clippy::unwrap_or_default, clippy::upper_case_acronyms, clippy::while_let_on_iterator, clippy::write_literal, clippy::write_with_newline, clippy::writeln_empty_string, clippy::wrong_self_convention, clippy::zero_ptr"##,
24094            default_severity: Severity::Allow,
24095            warn_since: None,
24096            deny_since: None,
24097        },
24098        children: &[
24099            "clippy::assertions_on_constants",
24100            "clippy::assign_op_pattern",
24101            "clippy::blocks_in_conditions",
24102            "clippy::bool_assert_comparison",
24103            "clippy::borrow_interior_mutable_const",
24104            "clippy::box_default",
24105            "clippy::builtin_type_shadow",
24106            "clippy::byte_char_slices",
24107            "clippy::bytes_nth",
24108            "clippy::chars_last_cmp",
24109            "clippy::chars_next_cmp",
24110            "clippy::cmp_null",
24111            "clippy::collapsible_else_if",
24112            "clippy::collapsible_if",
24113            "clippy::collapsible_match",
24114            "clippy::comparison_chain",
24115            "clippy::comparison_to_empty",
24116            "clippy::declare_interior_mutable_const",
24117            "clippy::default_instead_of_iter_empty",
24118            "clippy::disallowed_macros",
24119            "clippy::disallowed_methods",
24120            "clippy::disallowed_names",
24121            "clippy::disallowed_types",
24122            "clippy::doc_lazy_continuation",
24123            "clippy::double_must_use",
24124            "clippy::double_neg",
24125            "clippy::duplicate_underscore_argument",
24126            "clippy::enum_variant_names",
24127            "clippy::err_expect",
24128            "clippy::excessive_precision",
24129            "clippy::field_reassign_with_default",
24130            "clippy::filter_map_bool_then",
24131            "clippy::fn_to_numeric_cast",
24132            "clippy::fn_to_numeric_cast_with_truncation",
24133            "clippy::for_kv_map",
24134            "clippy::from_over_into",
24135            "clippy::from_str_radix_10",
24136            "clippy::get_first",
24137            "clippy::if_same_then_else",
24138            "clippy::implicit_saturating_add",
24139            "clippy::implicit_saturating_sub",
24140            "clippy::inconsistent_digit_grouping",
24141            "clippy::infallible_destructuring_match",
24142            "clippy::inherent_to_string",
24143            "clippy::init_numbered_fields",
24144            "clippy::into_iter_on_ref",
24145            "clippy::is_digit_ascii_radix",
24146            "clippy::items_after_test_module",
24147            "clippy::iter_cloned_collect",
24148            "clippy::iter_next_slice",
24149            "clippy::iter_nth",
24150            "clippy::iter_nth_zero",
24151            "clippy::iter_skip_next",
24152            "clippy::just_underscores_and_digits",
24153            "clippy::legacy_numeric_constants",
24154            "clippy::len_without_is_empty",
24155            "clippy::len_zero",
24156            "clippy::let_and_return",
24157            "clippy::let_unit_value",
24158            "clippy::main_recursion",
24159            "clippy::manual_async_fn",
24160            "clippy::manual_bits",
24161            "clippy::manual_is_ascii_check",
24162            "clippy::manual_is_finite",
24163            "clippy::manual_is_infinite",
24164            "clippy::manual_map",
24165            "clippy::manual_next_back",
24166            "clippy::manual_non_exhaustive",
24167            "clippy::manual_pattern_char_comparison",
24168            "clippy::manual_range_contains",
24169            "clippy::manual_rotate",
24170            "clippy::manual_saturating_arithmetic",
24171            "clippy::manual_while_let_some",
24172            "clippy::map_clone",
24173            "clippy::map_collect_result_unit",
24174            "clippy::match_like_matches_macro",
24175            "clippy::match_overlapping_arm",
24176            "clippy::match_ref_pats",
24177            "clippy::match_result_ok",
24178            "clippy::mem_replace_option_with_none",
24179            "clippy::mem_replace_with_default",
24180            "clippy::missing_enforced_import_renames",
24181            "clippy::missing_safety_doc",
24182            "clippy::mixed_attributes_style",
24183            "clippy::mixed_case_hex_literals",
24184            "clippy::module_inception",
24185            "clippy::must_use_unit",
24186            "clippy::mut_mutex_lock",
24187            "clippy::needless_borrow",
24188            "clippy::needless_borrows_for_generic_args",
24189            "clippy::needless_doctest_main",
24190            "clippy::needless_else",
24191            "clippy::needless_late_init",
24192            "clippy::needless_parens_on_range_literals",
24193            "clippy::needless_pub_self",
24194            "clippy::needless_range_loop",
24195            "clippy::needless_return",
24196            "clippy::needless_return_with_question_mark",
24197            "clippy::neg_multiply",
24198            "clippy::new_ret_no_self",
24199            "clippy::new_without_default",
24200            "clippy::non_minimal_cfg",
24201            "clippy::obfuscated_if_else",
24202            "clippy::ok_expect",
24203            "clippy::op_ref",
24204            "clippy::option_map_or_err_ok",
24205            "clippy::option_map_or_none",
24206            "clippy::partialeq_to_none",
24207            "clippy::print_literal",
24208            "clippy::print_with_newline",
24209            "clippy::println_empty_string",
24210            "clippy::ptr_arg",
24211            "clippy::ptr_eq",
24212            "clippy::question_mark",
24213            "clippy::redundant_closure",
24214            "clippy::redundant_field_names",
24215            "clippy::redundant_pattern",
24216            "clippy::redundant_pattern_matching",
24217            "clippy::redundant_static_lifetimes",
24218            "clippy::result_map_or_into_option",
24219            "clippy::result_unit_err",
24220            "clippy::same_item_push",
24221            "clippy::self_named_constructors",
24222            "clippy::should_implement_trait",
24223            "clippy::single_char_add_str",
24224            "clippy::single_component_path_imports",
24225            "clippy::single_match",
24226            "clippy::string_extend_chars",
24227            "clippy::tabs_in_doc_comments",
24228            "clippy::to_digit_is_some",
24229            "clippy::to_string_trait_impl",
24230            "clippy::too_long_first_doc_paragraph",
24231            "clippy::toplevel_ref_arg",
24232            "clippy::trim_split_whitespace",
24233            "clippy::unnecessary_fallible_conversions",
24234            "clippy::unnecessary_fold",
24235            "clippy::unnecessary_lazy_evaluations",
24236            "clippy::unnecessary_mut_passed",
24237            "clippy::unnecessary_owned_empty_strings",
24238            "clippy::unsafe_removed_from_name",
24239            "clippy::unused_enumerate_index",
24240            "clippy::unused_unit",
24241            "clippy::unusual_byte_groupings",
24242            "clippy::unwrap_or_default",
24243            "clippy::upper_case_acronyms",
24244            "clippy::while_let_on_iterator",
24245            "clippy::write_literal",
24246            "clippy::write_with_newline",
24247            "clippy::writeln_empty_string",
24248            "clippy::wrong_self_convention",
24249            "clippy::zero_ptr",
24250        ],
24251    },
24252    LintGroup {
24253        lint: Lint {
24254            label: "clippy::suspicious",
24255            description: r##"lint group for: clippy::almost_complete_range, clippy::arc_with_non_send_sync, clippy::await_holding_invalid_type, clippy::await_holding_lock, clippy::await_holding_refcell_ref, clippy::blanket_clippy_restriction_lints, clippy::cast_abs_to_unsigned, clippy::cast_enum_constructor, clippy::cast_enum_truncation, clippy::cast_nan_to_int, clippy::cast_slice_from_raw_parts, clippy::const_is_empty, clippy::crate_in_macro_def, clippy::deprecated_clippy_cfg_attr, clippy::drop_non_drop, clippy::duplicate_mod, clippy::duplicated_attributes, clippy::empty_docs, clippy::empty_line_after_doc_comments, clippy::empty_line_after_outer_attr, clippy::empty_loop, clippy::float_equality_without_abs, clippy::forget_non_drop, clippy::four_forward_slashes, clippy::from_raw_with_void_ptr, clippy::incompatible_msrv, clippy::ineffective_open_options, clippy::iter_out_of_bounds, clippy::join_absolute_paths, clippy::let_underscore_future, clippy::lines_filter_map_ok, clippy::macro_metavars_in_unsafe, clippy::manual_unwrap_or_default, clippy::misnamed_getters, clippy::misrefactored_assign_op, clippy::missing_transmute_annotations, clippy::multi_assignments, clippy::multiple_bound_locations, clippy::mut_range_bound, clippy::mutable_key_type, clippy::needless_character_iteration, clippy::needless_maybe_sized, clippy::no_effect_replace, clippy::non_canonical_clone_impl, clippy::non_canonical_partial_ord_impl, clippy::octal_escapes, clippy::path_ends_with_ext, clippy::permissions_set_readonly_false, clippy::pointers_in_nomem_asm_block, clippy::print_in_format_impl, clippy::rc_clone_in_vec_init, clippy::repeat_vec_with_capacity, clippy::single_range_in_vec_init, clippy::size_of_ref, clippy::suspicious_arithmetic_impl, clippy::suspicious_assignment_formatting, clippy::suspicious_command_arg_space, clippy::suspicious_doc_comments, clippy::suspicious_else_formatting, clippy::suspicious_map, clippy::suspicious_op_assign_impl, clippy::suspicious_open_options, clippy::suspicious_to_owned, clippy::suspicious_unary_op_formatting, clippy::swap_ptr_to_ref, clippy::test_attr_in_doctest, clippy::type_id_on_box, clippy::unconditional_recursion, clippy::unnecessary_clippy_cfg, clippy::unnecessary_get_then_check, clippy::unnecessary_result_map_or_else, clippy::zero_repeat_side_effects, clippy::zombie_processes"##,
24256            default_severity: Severity::Allow,
24257            warn_since: None,
24258            deny_since: None,
24259        },
24260        children: &[
24261            "clippy::almost_complete_range",
24262            "clippy::arc_with_non_send_sync",
24263            "clippy::await_holding_invalid_type",
24264            "clippy::await_holding_lock",
24265            "clippy::await_holding_refcell_ref",
24266            "clippy::blanket_clippy_restriction_lints",
24267            "clippy::cast_abs_to_unsigned",
24268            "clippy::cast_enum_constructor",
24269            "clippy::cast_enum_truncation",
24270            "clippy::cast_nan_to_int",
24271            "clippy::cast_slice_from_raw_parts",
24272            "clippy::const_is_empty",
24273            "clippy::crate_in_macro_def",
24274            "clippy::deprecated_clippy_cfg_attr",
24275            "clippy::drop_non_drop",
24276            "clippy::duplicate_mod",
24277            "clippy::duplicated_attributes",
24278            "clippy::empty_docs",
24279            "clippy::empty_line_after_doc_comments",
24280            "clippy::empty_line_after_outer_attr",
24281            "clippy::empty_loop",
24282            "clippy::float_equality_without_abs",
24283            "clippy::forget_non_drop",
24284            "clippy::four_forward_slashes",
24285            "clippy::from_raw_with_void_ptr",
24286            "clippy::incompatible_msrv",
24287            "clippy::ineffective_open_options",
24288            "clippy::iter_out_of_bounds",
24289            "clippy::join_absolute_paths",
24290            "clippy::let_underscore_future",
24291            "clippy::lines_filter_map_ok",
24292            "clippy::macro_metavars_in_unsafe",
24293            "clippy::manual_unwrap_or_default",
24294            "clippy::misnamed_getters",
24295            "clippy::misrefactored_assign_op",
24296            "clippy::missing_transmute_annotations",
24297            "clippy::multi_assignments",
24298            "clippy::multiple_bound_locations",
24299            "clippy::mut_range_bound",
24300            "clippy::mutable_key_type",
24301            "clippy::needless_character_iteration",
24302            "clippy::needless_maybe_sized",
24303            "clippy::no_effect_replace",
24304            "clippy::non_canonical_clone_impl",
24305            "clippy::non_canonical_partial_ord_impl",
24306            "clippy::octal_escapes",
24307            "clippy::path_ends_with_ext",
24308            "clippy::permissions_set_readonly_false",
24309            "clippy::pointers_in_nomem_asm_block",
24310            "clippy::print_in_format_impl",
24311            "clippy::rc_clone_in_vec_init",
24312            "clippy::repeat_vec_with_capacity",
24313            "clippy::single_range_in_vec_init",
24314            "clippy::size_of_ref",
24315            "clippy::suspicious_arithmetic_impl",
24316            "clippy::suspicious_assignment_formatting",
24317            "clippy::suspicious_command_arg_space",
24318            "clippy::suspicious_doc_comments",
24319            "clippy::suspicious_else_formatting",
24320            "clippy::suspicious_map",
24321            "clippy::suspicious_op_assign_impl",
24322            "clippy::suspicious_open_options",
24323            "clippy::suspicious_to_owned",
24324            "clippy::suspicious_unary_op_formatting",
24325            "clippy::swap_ptr_to_ref",
24326            "clippy::test_attr_in_doctest",
24327            "clippy::type_id_on_box",
24328            "clippy::unconditional_recursion",
24329            "clippy::unnecessary_clippy_cfg",
24330            "clippy::unnecessary_get_then_check",
24331            "clippy::unnecessary_result_map_or_else",
24332            "clippy::zero_repeat_side_effects",
24333            "clippy::zombie_processes",
24334        ],
24335    },
24336];
ide_db/generated/lints.rs

ide_db/generated/
lints.rs
