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_no_sanitize",
577        description: r##"detects incompatible use of `#[inline(always)]` and `#[sanitize(... = "off")]`"##,
578        default_severity: Severity::Warning,
579        warn_since: None,
580        deny_since: None,
581    },
582    Lint {
583        label: "integer_to_ptr_transmutes",
584        description: r##"detects integer to pointer transmutes"##,
585        default_severity: Severity::Warning,
586        warn_since: None,
587        deny_since: None,
588    },
589    Lint {
590        label: "internal_eq_trait_method_impls",
591        description: r##"manual implementation of the internal `Eq::assert_receiver_is_total_eq` method"##,
592        default_severity: Severity::Warning,
593        warn_since: None,
594        deny_since: None,
595    },
596    Lint {
597        label: "internal_features",
598        description: r##"internal features are not supposed to be used"##,
599        default_severity: Severity::Warning,
600        warn_since: None,
601        deny_since: None,
602    },
603    Lint {
604        label: "invalid_atomic_ordering",
605        description: r##"usage of invalid atomic ordering in atomic operations and memory fences"##,
606        default_severity: Severity::Error,
607        warn_since: None,
608        deny_since: None,
609    },
610    Lint {
611        label: "invalid_doc_attributes",
612        description: r##"detects invalid `#[doc(...)]` attributes"##,
613        default_severity: Severity::Warning,
614        warn_since: None,
615        deny_since: None,
616    },
617    Lint {
618        label: "invalid_from_utf8",
619        description: r##"using a non UTF-8 literal in `std::str::from_utf8`"##,
620        default_severity: Severity::Warning,
621        warn_since: None,
622        deny_since: None,
623    },
624    Lint {
625        label: "invalid_from_utf8_unchecked",
626        description: r##"using a non UTF-8 literal in `std::str::from_utf8_unchecked`"##,
627        default_severity: Severity::Error,
628        warn_since: None,
629        deny_since: None,
630    },
631    Lint {
632        label: "invalid_macro_export_arguments",
633        description: r##""invalid_parameter" isn't a valid argument for `#[macro_export]`"##,
634        default_severity: Severity::Error,
635        warn_since: None,
636        deny_since: None,
637    },
638    Lint {
639        label: "invalid_nan_comparisons",
640        description: r##"detects invalid floating point NaN comparisons"##,
641        default_severity: Severity::Warning,
642        warn_since: None,
643        deny_since: None,
644    },
645    Lint {
646        label: "invalid_null_arguments",
647        description: r##"invalid null pointer in arguments"##,
648        default_severity: Severity::Error,
649        warn_since: None,
650        deny_since: None,
651    },
652    Lint {
653        label: "invalid_reference_casting",
654        description: r##"casts of `&T` to `&mut T` without interior mutability"##,
655        default_severity: Severity::Error,
656        warn_since: None,
657        deny_since: None,
658    },
659    Lint {
660        label: "invalid_type_param_default",
661        description: r##"type parameter default erroneously allowed in invalid location"##,
662        default_severity: Severity::Error,
663        warn_since: None,
664        deny_since: None,
665    },
666    Lint {
667        label: "invalid_value",
668        description: r##"an invalid value is being created (such as a null reference)"##,
669        default_severity: Severity::Warning,
670        warn_since: None,
671        deny_since: None,
672    },
673    Lint {
674        label: "irrefutable_let_patterns",
675        description: r##"detects irrefutable patterns in `if let` and `while let` statements"##,
676        default_severity: Severity::Warning,
677        warn_since: None,
678        deny_since: None,
679    },
680    Lint {
681        label: "keyword_idents_2018",
682        description: r##"detects edition keywords being used as an identifier"##,
683        default_severity: Severity::Allow,
684        warn_since: None,
685        deny_since: None,
686    },
687    Lint {
688        label: "keyword_idents_2024",
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: "large_assignments",
696        description: r##"detects large moves or copies"##,
697        default_severity: Severity::Warning,
698        warn_since: None,
699        deny_since: None,
700    },
701    Lint {
702        label: "late_bound_lifetime_arguments",
703        description: r##"detects generic lifetime arguments in path segments with late bound lifetime parameters"##,
704        default_severity: Severity::Warning,
705        warn_since: None,
706        deny_since: None,
707    },
708    Lint {
709        label: "legacy_derive_helpers",
710        description: r##"detects derive helper attributes that are used before they are introduced"##,
711        default_severity: Severity::Error,
712        warn_since: None,
713        deny_since: None,
714    },
715    Lint {
716        label: "let_underscore_drop",
717        description: r##"non-binding let on a type that has a destructor"##,
718        default_severity: Severity::Allow,
719        warn_since: None,
720        deny_since: None,
721    },
722    Lint {
723        label: "let_underscore_lock",
724        description: r##"non-binding let on a synchronization lock"##,
725        default_severity: Severity::Error,
726        warn_since: None,
727        deny_since: None,
728    },
729    Lint {
730        label: "linker_info",
731        description: r##"linker warnings known to be informational-only and not indicative of a problem"##,
732        default_severity: Severity::Allow,
733        warn_since: None,
734        deny_since: None,
735    },
736    Lint {
737        label: "linker_messages",
738        description: r##"warnings emitted at runtime by the target-specific linker program"##,
739        default_severity: Severity::Warning,
740        warn_since: None,
741        deny_since: None,
742    },
743    Lint {
744        label: "long_running_const_eval",
745        description: r##"detects long const eval operations"##,
746        default_severity: Severity::Error,
747        warn_since: None,
748        deny_since: None,
749    },
750    Lint {
751        label: "lossy_provenance_casts",
752        description: r##"a lossy pointer to integer cast is used"##,
753        default_severity: Severity::Allow,
754        warn_since: None,
755        deny_since: None,
756    },
757    Lint {
758        label: "macro_expanded_macro_exports_accessed_by_absolute_paths",
759        description: r##"macro-expanded `macro_export` macros from the current crate cannot be referred to by absolute paths"##,
760        default_severity: Severity::Error,
761        warn_since: None,
762        deny_since: None,
763    },
764    Lint {
765        label: "macro_use_extern_crate",
766        description: r##"the `#[macro_use]` attribute is now deprecated in favor of using macros via the module system"##,
767        default_severity: Severity::Allow,
768        warn_since: None,
769        deny_since: None,
770    },
771    Lint {
772        label: "malformed_diagnostic_attributes",
773        description: r##"detects malformed diagnostic attributes"##,
774        default_severity: Severity::Warning,
775        warn_since: None,
776        deny_since: None,
777    },
778    Lint {
779        label: "malformed_diagnostic_format_literals",
780        description: r##"detects diagnostic attribute with malformed diagnostic format literals"##,
781        default_severity: Severity::Warning,
782        warn_since: None,
783        deny_since: None,
784    },
785    Lint {
786        label: "map_unit_fn",
787        description: r##"`Iterator::map` call that discard the iterator's values"##,
788        default_severity: Severity::Warning,
789        warn_since: None,
790        deny_since: None,
791    },
792    Lint {
793        label: "meta_variable_misuse",
794        description: r##"possible meta-variable misuse at macro definition"##,
795        default_severity: Severity::Allow,
796        warn_since: None,
797        deny_since: None,
798    },
799    Lint {
800        label: "mismatched_lifetime_syntaxes",
801        description: r##"detects when a lifetime uses different syntax between arguments and return values"##,
802        default_severity: Severity::Warning,
803        warn_since: None,
804        deny_since: None,
805    },
806    Lint {
807        label: "misplaced_diagnostic_attributes",
808        description: r##"detects diagnostic attributes that are placed on the wrong item"##,
809        default_severity: Severity::Warning,
810        warn_since: None,
811        deny_since: None,
812    },
813    Lint {
814        label: "missing_abi",
815        description: r##"No declared ABI for extern declaration"##,
816        default_severity: Severity::Warning,
817        warn_since: None,
818        deny_since: None,
819    },
820    Lint {
821        label: "missing_copy_implementations",
822        description: r##"detects potentially-forgotten implementations of `Copy`"##,
823        default_severity: Severity::Allow,
824        warn_since: None,
825        deny_since: None,
826    },
827    Lint {
828        label: "missing_debug_implementations",
829        description: r##"detects missing implementations of Debug"##,
830        default_severity: Severity::Allow,
831        warn_since: None,
832        deny_since: None,
833    },
834    Lint {
835        label: "missing_docs",
836        description: r##"detects missing documentation for public members"##,
837        default_severity: Severity::Allow,
838        warn_since: None,
839        deny_since: None,
840    },
841    Lint {
842        label: "missing_gpu_kernel_export_name",
843        description: r##"mangled gpu-kernel function"##,
844        default_severity: Severity::Warning,
845        warn_since: None,
846        deny_since: None,
847    },
848    Lint {
849        label: "missing_unsafe_on_extern",
850        description: r##"detects missing unsafe keyword on extern declarations"##,
851        default_severity: Severity::Allow,
852        warn_since: None,
853        deny_since: None,
854    },
855    Lint {
856        label: "mixed_script_confusables",
857        description: r##"detects Unicode scripts whose mixed script confusables codepoints are solely used"##,
858        default_severity: Severity::Warning,
859        warn_since: None,
860        deny_since: None,
861    },
862    Lint {
863        label: "multiple_supertrait_upcastable",
864        description: r##"detect when a dyn-compatible trait has multiple supertraits"##,
865        default_severity: Severity::Allow,
866        warn_since: None,
867        deny_since: None,
868    },
869    Lint {
870        label: "must_not_suspend",
871        description: r##"use of a `#[must_not_suspend]` value across a yield point"##,
872        default_severity: Severity::Allow,
873        warn_since: None,
874        deny_since: None,
875    },
876    Lint {
877        label: "mutable_transmutes",
878        description: r##"transmuting &T to &mut T is undefined behavior, even if the reference is unused"##,
879        default_severity: Severity::Error,
880        warn_since: None,
881        deny_since: None,
882    },
883    Lint {
884        label: "named_arguments_used_positionally",
885        description: r##"named arguments in format used positionally"##,
886        default_severity: Severity::Warning,
887        warn_since: None,
888        deny_since: None,
889    },
890    Lint {
891        label: "named_asm_labels",
892        description: r##"named labels in inline assembly"##,
893        default_severity: Severity::Error,
894        warn_since: None,
895        deny_since: None,
896    },
897    Lint {
898        label: "never_type_fallback_flowing_into_unsafe",
899        description: r##"never type fallback affecting unsafe function calls"##,
900        default_severity: Severity::Error,
901        warn_since: None,
902        deny_since: None,
903    },
904    Lint {
905        label: "no_mangle_const_items",
906        description: r##"const items will not have their symbols exported"##,
907        default_severity: Severity::Error,
908        warn_since: None,
909        deny_since: None,
910    },
911    Lint {
912        label: "no_mangle_generic_items",
913        description: r##"generic items must be mangled"##,
914        default_severity: Severity::Warning,
915        warn_since: None,
916        deny_since: None,
917    },
918    Lint {
919        label: "non_ascii_idents",
920        description: r##"detects non-ASCII identifiers"##,
921        default_severity: Severity::Allow,
922        warn_since: None,
923        deny_since: None,
924    },
925    Lint {
926        label: "non_camel_case_types",
927        description: r##"types, variants, traits and type parameters should have camel case names"##,
928        default_severity: Severity::Warning,
929        warn_since: None,
930        deny_since: None,
931    },
932    Lint {
933        label: "non_contiguous_range_endpoints",
934        description: r##"detects off-by-one errors with exclusive range patterns"##,
935        default_severity: Severity::Warning,
936        warn_since: None,
937        deny_since: None,
938    },
939    Lint {
940        label: "non_exhaustive_omitted_patterns",
941        description: r##"detect when patterns of types marked `non_exhaustive` are missed"##,
942        default_severity: Severity::Allow,
943        warn_since: None,
944        deny_since: None,
945    },
946    Lint {
947        label: "non_fmt_panics",
948        description: r##"detect single-argument panic!() invocations in which the argument is not a format string"##,
949        default_severity: Severity::Warning,
950        warn_since: None,
951        deny_since: None,
952    },
953    Lint {
954        label: "non_local_definitions",
955        description: r##"checks for non-local definitions"##,
956        default_severity: Severity::Warning,
957        warn_since: None,
958        deny_since: None,
959    },
960    Lint {
961        label: "non_shorthand_field_patterns",
962        description: r##"using `Struct { x: x }` instead of `Struct { x }` in a pattern"##,
963        default_severity: Severity::Warning,
964        warn_since: None,
965        deny_since: None,
966    },
967    Lint {
968        label: "non_snake_case",
969        description: r##"variables, methods, functions, lifetime parameters and modules should have snake case names"##,
970        default_severity: Severity::Warning,
971        warn_since: None,
972        deny_since: None,
973    },
974    Lint {
975        label: "non_upper_case_globals",
976        description: r##"static constants should have uppercase identifiers"##,
977        default_severity: Severity::Warning,
978        warn_since: None,
979        deny_since: None,
980    },
981    Lint {
982        label: "noop_method_call",
983        description: r##"detects the use of well-known noop methods"##,
984        default_severity: Severity::Warning,
985        warn_since: None,
986        deny_since: None,
987    },
988    Lint {
989        label: "opaque_hidden_inferred_bound",
990        description: r##"detects the use of nested `impl Trait` types in associated type bounds that are not general enough"##,
991        default_severity: Severity::Warning,
992        warn_since: None,
993        deny_since: None,
994    },
995    Lint {
996        label: "out_of_scope_macro_calls",
997        description: r##"detects out of scope calls to `macro_rules` in key-value attributes"##,
998        default_severity: Severity::Error,
999        warn_since: None,
1000        deny_since: None,
1001    },
1002    Lint {
1003        label: "overflowing_literals",
1004        description: r##"literal out of range for its type"##,
1005        default_severity: Severity::Error,
1006        warn_since: None,
1007        deny_since: None,
1008    },
1009    Lint {
1010        label: "overlapping_range_endpoints",
1011        description: r##"detects range patterns with overlapping endpoints"##,
1012        default_severity: Severity::Warning,
1013        warn_since: None,
1014        deny_since: None,
1015    },
1016    Lint {
1017        label: "path_statements",
1018        description: r##"path statements with no effect"##,
1019        default_severity: Severity::Warning,
1020        warn_since: None,
1021        deny_since: None,
1022    },
1023    Lint {
1024        label: "patterns_in_fns_without_body",
1025        description: r##"patterns in functions without body were erroneously allowed"##,
1026        default_severity: Severity::Error,
1027        warn_since: None,
1028        deny_since: None,
1029    },
1030    Lint {
1031        label: "private_bounds",
1032        description: r##"private type in secondary interface of an item"##,
1033        default_severity: Severity::Warning,
1034        warn_since: None,
1035        deny_since: None,
1036    },
1037    Lint {
1038        label: "private_interfaces",
1039        description: r##"private type in primary interface of an item"##,
1040        default_severity: Severity::Warning,
1041        warn_since: None,
1042        deny_since: None,
1043    },
1044    Lint {
1045        label: "proc_macro_derive_resolution_fallback",
1046        description: r##"detects proc macro derives using inaccessible names from parent modules"##,
1047        default_severity: Severity::Error,
1048        warn_since: None,
1049        deny_since: None,
1050    },
1051    Lint {
1052        label: "ptr_to_integer_transmute_in_consts",
1053        description: r##"detects pointer to integer transmutes in const functions and associated constants"##,
1054        default_severity: Severity::Warning,
1055        warn_since: None,
1056        deny_since: None,
1057    },
1058    Lint {
1059        label: "pub_use_of_private_extern_crate",
1060        description: r##"detect public re-exports of private extern crates"##,
1061        default_severity: Severity::Error,
1062        warn_since: None,
1063        deny_since: None,
1064    },
1065    Lint {
1066        label: "redundant_imports",
1067        description: r##"imports that are redundant due to being imported already"##,
1068        default_severity: Severity::Allow,
1069        warn_since: None,
1070        deny_since: None,
1071    },
1072    Lint {
1073        label: "redundant_lifetimes",
1074        description: r##"detects lifetime parameters that are redundant because they are equal to some other named lifetime"##,
1075        default_severity: Severity::Allow,
1076        warn_since: None,
1077        deny_since: None,
1078    },
1079    Lint {
1080        label: "redundant_semicolons",
1081        description: r##"detects unnecessary trailing semicolons"##,
1082        default_severity: Severity::Warning,
1083        warn_since: None,
1084        deny_since: None,
1085    },
1086    Lint {
1087        label: "refining_impl_trait_internal",
1088        description: r##"impl trait in impl method signature does not match trait method signature"##,
1089        default_severity: Severity::Warning,
1090        warn_since: None,
1091        deny_since: None,
1092    },
1093    Lint {
1094        label: "refining_impl_trait_reachable",
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: "renamed_and_removed_lints",
1102        description: r##"lints that have been renamed or removed"##,
1103        default_severity: Severity::Warning,
1104        warn_since: None,
1105        deny_since: None,
1106    },
1107    Lint {
1108        label: "repr_c_enums_larger_than_int",
1109        description: r##"repr(C) enums with discriminant values that do not fit into a C int"##,
1110        default_severity: Severity::Warning,
1111        warn_since: None,
1112        deny_since: None,
1113    },
1114    Lint {
1115        label: "repr_transparent_non_zst_fields",
1116        description: r##"transparent type contains an external ZST that is marked #[non_exhaustive] or contains private fields"##,
1117        default_severity: Severity::Error,
1118        warn_since: None,
1119        deny_since: None,
1120    },
1121    Lint {
1122        label: "resolving_to_items_shadowing_supertrait_items",
1123        description: r##"detects when a supertrait item is shadowed by a subtrait item"##,
1124        default_severity: Severity::Allow,
1125        warn_since: None,
1126        deny_since: None,
1127    },
1128    Lint {
1129        label: "rtsan_nonblocking_async",
1130        description: r##"detects incompatible uses of `#[sanitize(realtime = "nonblocking")]` on async functions"##,
1131        default_severity: Severity::Warning,
1132        warn_since: None,
1133        deny_since: None,
1134    },
1135    Lint {
1136        label: "rust_2021_incompatible_closure_captures",
1137        description: r##"detects closures affected by Rust 2021 changes"##,
1138        default_severity: Severity::Allow,
1139        warn_since: None,
1140        deny_since: None,
1141    },
1142    Lint {
1143        label: "rust_2021_incompatible_or_patterns",
1144        description: r##"detects usage of old versions of or-patterns"##,
1145        default_severity: Severity::Allow,
1146        warn_since: None,
1147        deny_since: None,
1148    },
1149    Lint {
1150        label: "rust_2021_prefixes_incompatible_syntax",
1151        description: r##"identifiers that will be parsed as a prefix in Rust 2021"##,
1152        default_severity: Severity::Allow,
1153        warn_since: None,
1154        deny_since: None,
1155    },
1156    Lint {
1157        label: "rust_2021_prelude_collisions",
1158        description: r##"detects the usage of trait methods which are ambiguous with traits added to the prelude in future editions"##,
1159        default_severity: Severity::Allow,
1160        warn_since: None,
1161        deny_since: None,
1162    },
1163    Lint {
1164        label: "rust_2024_guarded_string_incompatible_syntax",
1165        description: r##"will be parsed as a guarded string in Rust 2024"##,
1166        default_severity: Severity::Allow,
1167        warn_since: None,
1168        deny_since: None,
1169    },
1170    Lint {
1171        label: "rust_2024_incompatible_pat",
1172        description: r##"detects patterns whose meaning will change in Rust 2024"##,
1173        default_severity: Severity::Allow,
1174        warn_since: None,
1175        deny_since: None,
1176    },
1177    Lint {
1178        label: "rust_2024_prelude_collisions",
1179        description: r##"detects the usage of trait methods which are ambiguous with traits added to the prelude in future editions"##,
1180        default_severity: Severity::Allow,
1181        warn_since: None,
1182        deny_since: None,
1183    },
1184    Lint {
1185        label: "self_constructor_from_outer_item",
1186        description: r##"detect unsupported use of `Self` from outer item"##,
1187        default_severity: Severity::Warning,
1188        warn_since: None,
1189        deny_since: None,
1190    },
1191    Lint {
1192        label: "semicolon_in_expressions_from_macros",
1193        description: r##"trailing semicolon in macro body used as expression"##,
1194        default_severity: Severity::Error,
1195        warn_since: None,
1196        deny_since: None,
1197    },
1198    Lint {
1199        label: "shadowing_supertrait_items",
1200        description: r##"detects when a supertrait item is shadowed by a subtrait item"##,
1201        default_severity: Severity::Allow,
1202        warn_since: None,
1203        deny_since: None,
1204    },
1205    Lint {
1206        label: "single_use_lifetimes",
1207        description: r##"detects lifetime parameters that are only used once"##,
1208        default_severity: Severity::Allow,
1209        warn_since: None,
1210        deny_since: None,
1211    },
1212    Lint {
1213        label: "special_module_name",
1214        description: r##"module declarations for files with a special meaning"##,
1215        default_severity: Severity::Warning,
1216        warn_since: None,
1217        deny_since: None,
1218    },
1219    Lint {
1220        label: "stable_features",
1221        description: r##"stable features found in `#[feature]` directive"##,
1222        default_severity: Severity::Warning,
1223        warn_since: None,
1224        deny_since: None,
1225    },
1226    Lint {
1227        label: "static_mut_refs",
1228        description: r##"creating a shared reference to mutable static"##,
1229        default_severity: Severity::Warning,
1230        warn_since: None,
1231        deny_since: Some(Edition::Edition2024),
1232    },
1233    Lint {
1234        label: "suspicious_double_ref_op",
1235        description: r##"suspicious call of trait method on `&&T`"##,
1236        default_severity: Severity::Warning,
1237        warn_since: None,
1238        deny_since: None,
1239    },
1240    Lint {
1241        label: "tail_call_track_caller",
1242        description: r##"detects tail calls of functions marked with `#[track_caller]`"##,
1243        default_severity: Severity::Warning,
1244        warn_since: None,
1245        deny_since: None,
1246    },
1247    Lint {
1248        label: "tail_expr_drop_order",
1249        description: r##"Detect and warn on significant change in drop order in tail expression location"##,
1250        default_severity: Severity::Allow,
1251        warn_since: None,
1252        deny_since: None,
1253    },
1254    Lint {
1255        label: "test_unstable_lint",
1256        description: r##"this unstable lint is only for testing"##,
1257        default_severity: Severity::Error,
1258        warn_since: None,
1259        deny_since: None,
1260    },
1261    Lint {
1262        label: "text_direction_codepoint_in_comment",
1263        description: r##"invisible directionality-changing codepoints in comment"##,
1264        default_severity: Severity::Error,
1265        warn_since: None,
1266        deny_since: None,
1267    },
1268    Lint {
1269        label: "text_direction_codepoint_in_literal",
1270        description: r##"detect special Unicode codepoints that affect the visual representation of text on screen, changing the direction in which text flows"##,
1271        default_severity: Severity::Error,
1272        warn_since: None,
1273        deny_since: None,
1274    },
1275    Lint {
1276        label: "trivial_bounds",
1277        description: r##"these bounds don't depend on an type parameters"##,
1278        default_severity: Severity::Warning,
1279        warn_since: None,
1280        deny_since: None,
1281    },
1282    Lint {
1283        label: "trivial_casts",
1284        description: r##"detects trivial casts which could be removed"##,
1285        default_severity: Severity::Allow,
1286        warn_since: None,
1287        deny_since: None,
1288    },
1289    Lint {
1290        label: "trivial_numeric_casts",
1291        description: r##"detects trivial casts of numeric types which could be removed"##,
1292        default_severity: Severity::Allow,
1293        warn_since: None,
1294        deny_since: None,
1295    },
1296    Lint {
1297        label: "type_alias_bounds",
1298        description: r##"bounds in type aliases are not enforced"##,
1299        default_severity: Severity::Warning,
1300        warn_since: None,
1301        deny_since: None,
1302    },
1303    Lint {
1304        label: "tyvar_behind_raw_pointer",
1305        description: r##"raw pointer to an inference variable"##,
1306        default_severity: Severity::Warning,
1307        warn_since: None,
1308        deny_since: None,
1309    },
1310    Lint {
1311        label: "uncommon_codepoints",
1312        description: r##"detects uncommon Unicode codepoints in identifiers"##,
1313        default_severity: Severity::Warning,
1314        warn_since: None,
1315        deny_since: None,
1316    },
1317    Lint {
1318        label: "unconditional_panic",
1319        description: r##"operation will cause a panic at runtime"##,
1320        default_severity: Severity::Error,
1321        warn_since: None,
1322        deny_since: None,
1323    },
1324    Lint {
1325        label: "unconditional_recursion",
1326        description: r##"functions that cannot return without calling themselves"##,
1327        default_severity: Severity::Warning,
1328        warn_since: None,
1329        deny_since: None,
1330    },
1331    Lint {
1332        label: "uncovered_param_in_projection",
1333        description: r##"impl contains type parameters that are not covered"##,
1334        default_severity: Severity::Warning,
1335        warn_since: None,
1336        deny_since: None,
1337    },
1338    Lint {
1339        label: "undropped_manually_drops",
1340        description: r##"calls to `std::mem::drop` with `std::mem::ManuallyDrop` instead of it's inner value"##,
1341        default_severity: Severity::Error,
1342        warn_since: None,
1343        deny_since: None,
1344    },
1345    Lint {
1346        label: "unexpected_cfgs",
1347        description: r##"detects unexpected names and values in `#[cfg]` conditions"##,
1348        default_severity: Severity::Warning,
1349        warn_since: None,
1350        deny_since: None,
1351    },
1352    Lint {
1353        label: "unfulfilled_lint_expectations",
1354        description: r##"unfulfilled lint expectation"##,
1355        default_severity: Severity::Warning,
1356        warn_since: None,
1357        deny_since: None,
1358    },
1359    Lint {
1360        label: "ungated_async_fn_track_caller",
1361        description: r##"enabling track_caller on an async fn is a no-op unless the async_fn_track_caller feature is enabled"##,
1362        default_severity: Severity::Warning,
1363        warn_since: None,
1364        deny_since: None,
1365    },
1366    Lint {
1367        label: "uninhabited_static",
1368        description: r##"uninhabited static"##,
1369        default_severity: Severity::Error,
1370        warn_since: None,
1371        deny_since: None,
1372    },
1373    Lint {
1374        label: "unit_bindings",
1375        description: r##"binding is useless because it has the unit `()` type"##,
1376        default_severity: Severity::Allow,
1377        warn_since: None,
1378        deny_since: None,
1379    },
1380    Lint {
1381        label: "unknown_crate_types",
1382        description: r##"unknown crate type found in `#[crate_type]` directive"##,
1383        default_severity: Severity::Error,
1384        warn_since: None,
1385        deny_since: None,
1386    },
1387    Lint {
1388        label: "unknown_diagnostic_attributes",
1389        description: r##"detects unknown diagnostic attributes"##,
1390        default_severity: Severity::Warning,
1391        warn_since: None,
1392        deny_since: None,
1393    },
1394    Lint {
1395        label: "unknown_lints",
1396        description: r##"unrecognized lint attribute"##,
1397        default_severity: Severity::Warning,
1398        warn_since: None,
1399        deny_since: None,
1400    },
1401    Lint {
1402        label: "unnameable_test_items",
1403        description: r##"detects an item that cannot be named being marked as `#[test_case]`"##,
1404        default_severity: Severity::Warning,
1405        warn_since: None,
1406        deny_since: None,
1407    },
1408    Lint {
1409        label: "unnameable_types",
1410        description: r##"effective visibility of a type is larger than the area in which it can be named"##,
1411        default_severity: Severity::Allow,
1412        warn_since: None,
1413        deny_since: None,
1414    },
1415    Lint {
1416        label: "unnecessary_transmutes",
1417        description: r##"detects transmutes that can also be achieved by other operations"##,
1418        default_severity: Severity::Warning,
1419        warn_since: None,
1420        deny_since: None,
1421    },
1422    Lint {
1423        label: "unpredictable_function_pointer_comparisons",
1424        description: r##"detects unpredictable function pointer comparisons"##,
1425        default_severity: Severity::Warning,
1426        warn_since: None,
1427        deny_since: None,
1428    },
1429    Lint {
1430        label: "unqualified_local_imports",
1431        description: r##"`use` of a local item without leading `self::`, `super::`, or `crate::`"##,
1432        default_severity: Severity::Allow,
1433        warn_since: None,
1434        deny_since: None,
1435    },
1436    Lint {
1437        label: "unreachable_cfg_select_predicates",
1438        description: r##"detects unreachable configuration predicates in the cfg_select macro"##,
1439        default_severity: Severity::Warning,
1440        warn_since: None,
1441        deny_since: None,
1442    },
1443    Lint {
1444        label: "unreachable_code",
1445        description: r##"detects unreachable code paths"##,
1446        default_severity: Severity::Warning,
1447        warn_since: None,
1448        deny_since: None,
1449    },
1450    Lint {
1451        label: "unreachable_patterns",
1452        description: r##"detects unreachable patterns"##,
1453        default_severity: Severity::Warning,
1454        warn_since: None,
1455        deny_since: None,
1456    },
1457    Lint {
1458        label: "unreachable_pub",
1459        description: r##"`pub` items not reachable from crate root"##,
1460        default_severity: Severity::Allow,
1461        warn_since: None,
1462        deny_since: None,
1463    },
1464    Lint {
1465        label: "unsafe_attr_outside_unsafe",
1466        description: r##"detects unsafe attributes outside of unsafe"##,
1467        default_severity: Severity::Allow,
1468        warn_since: None,
1469        deny_since: None,
1470    },
1471    Lint {
1472        label: "unsafe_code",
1473        description: r##"usage of `unsafe` code and other potentially unsound constructs"##,
1474        default_severity: Severity::Allow,
1475        warn_since: None,
1476        deny_since: None,
1477    },
1478    Lint {
1479        label: "unsafe_op_in_unsafe_fn",
1480        description: r##"unsafe operations in unsafe functions without an explicit unsafe block are deprecated"##,
1481        default_severity: Severity::Allow,
1482        warn_since: Some(Edition::Edition2024),
1483        deny_since: None,
1484    },
1485    Lint {
1486        label: "unstable_features",
1487        description: r##"enabling unstable features"##,
1488        default_severity: Severity::Allow,
1489        warn_since: None,
1490        deny_since: None,
1491    },
1492    Lint {
1493        label: "unstable_name_collisions",
1494        description: r##"detects name collision with an existing but unstable method"##,
1495        default_severity: Severity::Warning,
1496        warn_since: None,
1497        deny_since: None,
1498    },
1499    Lint {
1500        label: "unstable_syntax_pre_expansion",
1501        description: r##"unstable syntax can change at any point in the future, causing a hard error!"##,
1502        default_severity: Severity::Warning,
1503        warn_since: None,
1504        deny_since: None,
1505    },
1506    Lint {
1507        label: "unsupported_calling_conventions",
1508        description: r##"use of unsupported calling convention"##,
1509        default_severity: Severity::Warning,
1510        warn_since: None,
1511        deny_since: None,
1512    },
1513    Lint {
1514        label: "unused_allocation",
1515        description: r##"detects unnecessary allocations that can be eliminated"##,
1516        default_severity: Severity::Warning,
1517        warn_since: None,
1518        deny_since: None,
1519    },
1520    Lint {
1521        label: "unused_assignments",
1522        description: r##"detect assignments that will never be read"##,
1523        default_severity: Severity::Warning,
1524        warn_since: None,
1525        deny_since: None,
1526    },
1527    Lint {
1528        label: "unused_associated_type_bounds",
1529        description: r##"detects unused `Foo = Bar` bounds in `dyn Trait<Foo = Bar>`"##,
1530        default_severity: Severity::Warning,
1531        warn_since: None,
1532        deny_since: None,
1533    },
1534    Lint {
1535        label: "unused_attributes",
1536        description: r##"detects attributes that were not used by the compiler"##,
1537        default_severity: Severity::Warning,
1538        warn_since: None,
1539        deny_since: None,
1540    },
1541    Lint {
1542        label: "unused_braces",
1543        description: r##"unnecessary braces around an expression"##,
1544        default_severity: Severity::Warning,
1545        warn_since: None,
1546        deny_since: None,
1547    },
1548    Lint {
1549        label: "unused_comparisons",
1550        description: r##"comparisons made useless by limits of the types involved"##,
1551        default_severity: Severity::Warning,
1552        warn_since: None,
1553        deny_since: None,
1554    },
1555    Lint {
1556        label: "unused_crate_dependencies",
1557        description: r##"crate dependencies that are never used"##,
1558        default_severity: Severity::Allow,
1559        warn_since: None,
1560        deny_since: None,
1561    },
1562    Lint {
1563        label: "unused_doc_comments",
1564        description: r##"detects doc comments that aren't used by rustdoc"##,
1565        default_severity: Severity::Warning,
1566        warn_since: None,
1567        deny_since: None,
1568    },
1569    Lint {
1570        label: "unused_extern_crates",
1571        description: r##"extern crates that are never used"##,
1572        default_severity: Severity::Allow,
1573        warn_since: None,
1574        deny_since: None,
1575    },
1576    Lint {
1577        label: "unused_features",
1578        description: r##"unused features found in crate-level `#[feature]` directives"##,
1579        default_severity: Severity::Warning,
1580        warn_since: None,
1581        deny_since: None,
1582    },
1583    Lint {
1584        label: "unused_import_braces",
1585        description: r##"unnecessary braces around an imported item"##,
1586        default_severity: Severity::Allow,
1587        warn_since: None,
1588        deny_since: None,
1589    },
1590    Lint {
1591        label: "unused_imports",
1592        description: r##"imports that are never used"##,
1593        default_severity: Severity::Warning,
1594        warn_since: None,
1595        deny_since: None,
1596    },
1597    Lint {
1598        label: "unused_labels",
1599        description: r##"detects labels that are never used"##,
1600        default_severity: Severity::Warning,
1601        warn_since: None,
1602        deny_since: None,
1603    },
1604    Lint {
1605        label: "unused_lifetimes",
1606        description: r##"detects lifetime parameters that are never used"##,
1607        default_severity: Severity::Allow,
1608        warn_since: None,
1609        deny_since: None,
1610    },
1611    Lint {
1612        label: "unused_macro_rules",
1613        description: r##"detects macro rules that were not used"##,
1614        default_severity: Severity::Allow,
1615        warn_since: None,
1616        deny_since: None,
1617    },
1618    Lint {
1619        label: "unused_macros",
1620        description: r##"detects macros that were not used"##,
1621        default_severity: Severity::Warning,
1622        warn_since: None,
1623        deny_since: None,
1624    },
1625    Lint {
1626        label: "unused_must_use",
1627        description: r##"unused result of a type flagged as `#[must_use]`"##,
1628        default_severity: Severity::Warning,
1629        warn_since: None,
1630        deny_since: None,
1631    },
1632    Lint {
1633        label: "unused_mut",
1634        description: r##"detect mut variables which don't need to be mutable"##,
1635        default_severity: Severity::Warning,
1636        warn_since: None,
1637        deny_since: None,
1638    },
1639    Lint {
1640        label: "unused_parens",
1641        description: r##"`if`, `match`, `while` and `return` do not need parentheses"##,
1642        default_severity: Severity::Warning,
1643        warn_since: None,
1644        deny_since: None,
1645    },
1646    Lint {
1647        label: "unused_qualifications",
1648        description: r##"detects unnecessarily qualified names"##,
1649        default_severity: Severity::Allow,
1650        warn_since: None,
1651        deny_since: None,
1652    },
1653    Lint {
1654        label: "unused_results",
1655        description: r##"unused result of an expression in a statement"##,
1656        default_severity: Severity::Allow,
1657        warn_since: None,
1658        deny_since: None,
1659    },
1660    Lint {
1661        label: "unused_unsafe",
1662        description: r##"unnecessary use of an `unsafe` block"##,
1663        default_severity: Severity::Warning,
1664        warn_since: None,
1665        deny_since: None,
1666    },
1667    Lint {
1668        label: "unused_variables",
1669        description: r##"detect variables which are not used in any way"##,
1670        default_severity: Severity::Warning,
1671        warn_since: None,
1672        deny_since: None,
1673    },
1674    Lint {
1675        label: "unused_visibilities",
1676        description: r##"detect visibility qualifiers on `const _` items"##,
1677        default_severity: Severity::Warning,
1678        warn_since: None,
1679        deny_since: None,
1680    },
1681    Lint {
1682        label: "useless_deprecated",
1683        description: r##"detects deprecation attributes with no effect"##,
1684        default_severity: Severity::Error,
1685        warn_since: None,
1686        deny_since: None,
1687    },
1688    Lint {
1689        label: "useless_ptr_null_checks",
1690        description: r##"useless checking of non-null-typed pointer"##,
1691        default_severity: Severity::Warning,
1692        warn_since: None,
1693        deny_since: None,
1694    },
1695    Lint {
1696        label: "uses_power_alignment",
1697        description: r##"Structs do not follow the power alignment rule under repr(C)"##,
1698        default_severity: Severity::Warning,
1699        warn_since: None,
1700        deny_since: None,
1701    },
1702    Lint {
1703        label: "varargs_without_pattern",
1704        description: r##"detects usage of `...` arguments without a pattern in non-foreign items"##,
1705        default_severity: Severity::Error,
1706        warn_since: None,
1707        deny_since: None,
1708    },
1709    Lint {
1710        label: "variant_size_differences",
1711        description: r##"detects enums with widely varying variant sizes"##,
1712        default_severity: Severity::Allow,
1713        warn_since: None,
1714        deny_since: None,
1715    },
1716    Lint {
1717        label: "warnings",
1718        description: r##"mass-change the level for lints which produce warnings"##,
1719        default_severity: Severity::Warning,
1720        warn_since: None,
1721        deny_since: None,
1722    },
1723    Lint {
1724        label: "while_true",
1725        description: r##"suggest using `loop { }` instead of `while true { }`"##,
1726        default_severity: Severity::Warning,
1727        warn_since: None,
1728        deny_since: None,
1729    },
1730    Lint {
1731        label: "deprecated_safe",
1732        description: r##"lint group for: deprecated-safe-2024"##,
1733        default_severity: Severity::Allow,
1734        warn_since: None,
1735        deny_since: None,
1736    },
1737    Lint {
1738        label: "future_incompatible",
1739        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"##,
1740        default_severity: Severity::Allow,
1741        warn_since: None,
1742        deny_since: None,
1743    },
1744    Lint {
1745        label: "keyword_idents",
1746        description: r##"lint group for: keyword-idents-2018, keyword-idents-2024"##,
1747        default_severity: Severity::Allow,
1748        warn_since: None,
1749        deny_since: None,
1750    },
1751    Lint {
1752        label: "let_underscore",
1753        description: r##"lint group for: let-underscore-drop, let-underscore-lock"##,
1754        default_severity: Severity::Allow,
1755        warn_since: None,
1756        deny_since: None,
1757    },
1758    Lint {
1759        label: "nonstandard_style",
1760        description: r##"lint group for: non-camel-case-types, non-snake-case, non-upper-case-globals"##,
1761        default_severity: Severity::Allow,
1762        warn_since: None,
1763        deny_since: None,
1764    },
1765    Lint {
1766        label: "refining_impl_trait",
1767        description: r##"lint group for: refining-impl-trait-reachable, refining-impl-trait-internal"##,
1768        default_severity: Severity::Allow,
1769        warn_since: None,
1770        deny_since: None,
1771    },
1772    Lint {
1773        label: "rust_2018_compatibility",
1774        description: r##"lint group for: keyword-idents-2018, anonymous-parameters, absolute-paths-not-starting-with-crate, tyvar-behind-raw-pointer"##,
1775        default_severity: Severity::Allow,
1776        warn_since: None,
1777        deny_since: None,
1778    },
1779    Lint {
1780        label: "rust_2018_idioms",
1781        description: r##"lint group for: bare-trait-objects, unused-extern-crates, ellipsis-inclusive-range-patterns, elided-lifetimes-in-paths, explicit-outlives-requirements"##,
1782        default_severity: Severity::Allow,
1783        warn_since: None,
1784        deny_since: None,
1785    },
1786    Lint {
1787        label: "rust_2021_compatibility",
1788        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"##,
1789        default_severity: Severity::Allow,
1790        warn_since: None,
1791        deny_since: None,
1792    },
1793    Lint {
1794        label: "rust_2024_compatibility",
1795        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"##,
1796        default_severity: Severity::Allow,
1797        warn_since: None,
1798        deny_since: None,
1799    },
1800    Lint {
1801        label: "unknown_or_malformed_diagnostic_attributes",
1802        description: r##"lint group for: malformed-diagnostic-attributes, malformed-diagnostic-format-literals, misplaced-diagnostic-attributes, unknown-diagnostic-attributes"##,
1803        default_severity: Severity::Allow,
1804        warn_since: None,
1805        deny_since: None,
1806    },
1807    Lint {
1808        label: "unused",
1809        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"##,
1810        default_severity: Severity::Allow,
1811        warn_since: None,
1812        deny_since: None,
1813    },
1814];
1815
1816pub const DEFAULT_LINT_GROUPS: &[LintGroup] = &[
1817    LintGroup {
1818        lint: Lint {
1819            label: "deprecated_safe",
1820            description: r##"lint group for: deprecated-safe-2024"##,
1821            default_severity: Severity::Allow,
1822            warn_since: None,
1823            deny_since: None,
1824        },
1825        children: &["deprecated_safe_2024"],
1826    },
1827    LintGroup {
1828        lint: Lint {
1829            label: "future_incompatible",
1830            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"##,
1831            default_severity: Severity::Allow,
1832            warn_since: None,
1833            deny_since: None,
1834        },
1835        children: &[
1836            "internal_eq_trait_method_impls",
1837            "aarch64_softfloat_neon",
1838            "ambiguous_associated_items",
1839            "ambiguous_derive_helpers",
1840            "ambiguous_glob_imported_traits",
1841            "ambiguous_glob_imports",
1842            "ambiguous_import_visibilities",
1843            "ambiguous_panic_imports",
1844            "coherence_leak_check",
1845            "conflicting_repr_hints",
1846            "const_evaluatable_unchecked",
1847            "elided_lifetimes_in_associated_constant",
1848            "float_literal_f32_fallback",
1849            "forbidden_lint_groups",
1850            "ill_formed_attribute_input",
1851            "invalid_macro_export_arguments",
1852            "invalid_type_param_default",
1853            "late_bound_lifetime_arguments",
1854            "legacy_derive_helpers",
1855            "macro_expanded_macro_exports_accessed_by_absolute_paths",
1856            "out_of_scope_macro_calls",
1857            "patterns_in_fns_without_body",
1858            "proc_macro_derive_resolution_fallback",
1859            "pub_use_of_private_extern_crate",
1860            "repr_c_enums_larger_than_int",
1861            "repr_transparent_non_zst_fields",
1862            "self_constructor_from_outer_item",
1863            "semicolon_in_expressions_from_macros",
1864            "uncovered_param_in_projection",
1865            "uninhabited_static",
1866            "unstable_name_collisions",
1867            "unstable_syntax_pre_expansion",
1868            "unsupported_calling_conventions",
1869            "varargs_without_pattern",
1870        ],
1871    },
1872    LintGroup {
1873        lint: Lint {
1874            label: "keyword_idents",
1875            description: r##"lint group for: keyword-idents-2018, keyword-idents-2024"##,
1876            default_severity: Severity::Allow,
1877            warn_since: None,
1878            deny_since: None,
1879        },
1880        children: &["keyword_idents_2018", "keyword_idents_2024"],
1881    },
1882    LintGroup {
1883        lint: Lint {
1884            label: "let_underscore",
1885            description: r##"lint group for: let-underscore-drop, let-underscore-lock"##,
1886            default_severity: Severity::Allow,
1887            warn_since: None,
1888            deny_since: None,
1889        },
1890        children: &["let_underscore_drop", "let_underscore_lock"],
1891    },
1892    LintGroup {
1893        lint: Lint {
1894            label: "nonstandard_style",
1895            description: r##"lint group for: non-camel-case-types, non-snake-case, non-upper-case-globals"##,
1896            default_severity: Severity::Allow,
1897            warn_since: None,
1898            deny_since: None,
1899        },
1900        children: &["non_camel_case_types", "non_snake_case", "non_upper_case_globals"],
1901    },
1902    LintGroup {
1903        lint: Lint {
1904            label: "refining_impl_trait",
1905            description: r##"lint group for: refining-impl-trait-reachable, refining-impl-trait-internal"##,
1906            default_severity: Severity::Allow,
1907            warn_since: None,
1908            deny_since: None,
1909        },
1910        children: &["refining_impl_trait_reachable", "refining_impl_trait_internal"],
1911    },
1912    LintGroup {
1913        lint: Lint {
1914            label: "rust_2018_compatibility",
1915            description: r##"lint group for: keyword-idents-2018, anonymous-parameters, absolute-paths-not-starting-with-crate, tyvar-behind-raw-pointer"##,
1916            default_severity: Severity::Allow,
1917            warn_since: None,
1918            deny_since: None,
1919        },
1920        children: &[
1921            "keyword_idents_2018",
1922            "anonymous_parameters",
1923            "absolute_paths_not_starting_with_crate",
1924            "tyvar_behind_raw_pointer",
1925        ],
1926    },
1927    LintGroup {
1928        lint: Lint {
1929            label: "rust_2018_idioms",
1930            description: r##"lint group for: bare-trait-objects, unused-extern-crates, ellipsis-inclusive-range-patterns, elided-lifetimes-in-paths, explicit-outlives-requirements"##,
1931            default_severity: Severity::Allow,
1932            warn_since: None,
1933            deny_since: None,
1934        },
1935        children: &[
1936            "bare_trait_objects",
1937            "unused_extern_crates",
1938            "ellipsis_inclusive_range_patterns",
1939            "elided_lifetimes_in_paths",
1940            "explicit_outlives_requirements",
1941        ],
1942    },
1943    LintGroup {
1944        lint: Lint {
1945            label: "rust_2021_compatibility",
1946            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"##,
1947            default_severity: Severity::Allow,
1948            warn_since: None,
1949            deny_since: None,
1950        },
1951        children: &[
1952            "ellipsis_inclusive_range_patterns",
1953            "array_into_iter",
1954            "non_fmt_panics",
1955            "bare_trait_objects",
1956            "rust_2021_incompatible_closure_captures",
1957            "rust_2021_incompatible_or_patterns",
1958            "rust_2021_prefixes_incompatible_syntax",
1959            "rust_2021_prelude_collisions",
1960        ],
1961    },
1962    LintGroup {
1963        lint: Lint {
1964            label: "rust_2024_compatibility",
1965            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"##,
1966            default_severity: Severity::Allow,
1967            warn_since: None,
1968            deny_since: None,
1969        },
1970        children: &[
1971            "keyword_idents_2024",
1972            "edition_2024_expr_fragment_specifier",
1973            "boxed_slice_into_iter",
1974            "impl_trait_overcaptures",
1975            "if_let_rescope",
1976            "static_mut_refs",
1977            "dependency_on_unit_never_type_fallback",
1978            "deprecated_safe_2024",
1979            "missing_unsafe_on_extern",
1980            "never_type_fallback_flowing_into_unsafe",
1981            "rust_2024_guarded_string_incompatible_syntax",
1982            "rust_2024_incompatible_pat",
1983            "rust_2024_prelude_collisions",
1984            "tail_expr_drop_order",
1985            "unsafe_attr_outside_unsafe",
1986            "unsafe_op_in_unsafe_fn",
1987        ],
1988    },
1989    LintGroup {
1990        lint: Lint {
1991            label: "unknown_or_malformed_diagnostic_attributes",
1992            description: r##"lint group for: malformed-diagnostic-attributes, malformed-diagnostic-format-literals, misplaced-diagnostic-attributes, unknown-diagnostic-attributes"##,
1993            default_severity: Severity::Allow,
1994            warn_since: None,
1995            deny_since: None,
1996        },
1997        children: &[
1998            "malformed_diagnostic_attributes",
1999            "malformed_diagnostic_format_literals",
2000            "misplaced_diagnostic_attributes",
2001            "unknown_diagnostic_attributes",
2002        ],
2003    },
2004    LintGroup {
2005        lint: Lint {
2006            label: "unused",
2007            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"##,
2008            default_severity: Severity::Allow,
2009            warn_since: None,
2010            deny_since: None,
2011        },
2012        children: &[
2013            "unused_imports",
2014            "unused_variables",
2015            "unused_visibilities",
2016            "unused_assignments",
2017            "dead_code",
2018            "unused_mut",
2019            "unreachable_code",
2020            "unreachable_patterns",
2021            "unused_must_use",
2022            "unused_unsafe",
2023            "path_statements",
2024            "unused_attributes",
2025            "unused_macros",
2026            "unused_macro_rules",
2027            "unused_allocation",
2028            "unused_doc_comments",
2029            "unused_extern_crates",
2030            "unused_features",
2031            "unused_labels",
2032            "unused_parens",
2033            "unused_braces",
2034            "redundant_semicolons",
2035            "map_unit_fn",
2036        ],
2037    },
2038];
2039
2040pub const RUSTDOC_LINTS: &[Lint] = &[
2041    Lint {
2042        label: "rustdoc::bare_urls",
2043        description: r##"detects URLs that are not hyperlinks"##,
2044        default_severity: Severity::Warning,
2045        warn_since: None,
2046        deny_since: None,
2047    },
2048    Lint {
2049        label: "rustdoc::broken_intra_doc_links",
2050        description: r##"failures in resolving intra-doc link targets"##,
2051        default_severity: Severity::Warning,
2052        warn_since: None,
2053        deny_since: None,
2054    },
2055    Lint {
2056        label: "rustdoc::invalid_codeblock_attributes",
2057        description: r##"codeblock attribute looks a lot like a known one"##,
2058        default_severity: Severity::Warning,
2059        warn_since: None,
2060        deny_since: None,
2061    },
2062    Lint {
2063        label: "rustdoc::invalid_html_tags",
2064        description: r##"detects invalid HTML tags in doc comments"##,
2065        default_severity: Severity::Warning,
2066        warn_since: None,
2067        deny_since: None,
2068    },
2069    Lint {
2070        label: "rustdoc::invalid_rust_codeblocks",
2071        description: r##"codeblock could not be parsed as valid Rust or is empty"##,
2072        default_severity: Severity::Warning,
2073        warn_since: None,
2074        deny_since: None,
2075    },
2076    Lint {
2077        label: "rustdoc::missing_crate_level_docs",
2078        description: r##"detects crates with no crate-level documentation"##,
2079        default_severity: Severity::Allow,
2080        warn_since: None,
2081        deny_since: None,
2082    },
2083    Lint {
2084        label: "rustdoc::missing_doc_code_examples",
2085        description: r##"detects publicly-exported items without code samples in their documentation"##,
2086        default_severity: Severity::Allow,
2087        warn_since: None,
2088        deny_since: None,
2089    },
2090    Lint {
2091        label: "rustdoc::private_doc_tests",
2092        description: r##"detects code samples in docs of private items not documented by rustdoc"##,
2093        default_severity: Severity::Allow,
2094        warn_since: None,
2095        deny_since: None,
2096    },
2097    Lint {
2098        label: "rustdoc::private_intra_doc_links",
2099        description: r##"linking from a public item to a private one"##,
2100        default_severity: Severity::Warning,
2101        warn_since: None,
2102        deny_since: None,
2103    },
2104    Lint {
2105        label: "rustdoc::redundant_explicit_links",
2106        description: r##"detects redundant explicit links in doc comments"##,
2107        default_severity: Severity::Warning,
2108        warn_since: None,
2109        deny_since: None,
2110    },
2111    Lint {
2112        label: "rustdoc::unescaped_backticks",
2113        description: r##"detects unescaped backticks in doc comments"##,
2114        default_severity: Severity::Allow,
2115        warn_since: None,
2116        deny_since: None,
2117    },
2118    Lint {
2119        label: "rustdoc::all",
2120        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"##,
2121        default_severity: Severity::Allow,
2122        warn_since: None,
2123        deny_since: None,
2124    },
2125];
2126
2127pub const RUSTDOC_LINT_GROUPS: &[LintGroup] = &[LintGroup {
2128    lint: Lint {
2129        label: "rustdoc::all",
2130        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"##,
2131        default_severity: Severity::Allow,
2132        warn_since: None,
2133        deny_since: None,
2134    },
2135    children: &[
2136        "rustdoc::broken_intra_doc_links",
2137        "rustdoc::private_intra_doc_links",
2138        "rustdoc::private_doc_tests",
2139        "rustdoc::invalid_codeblock_attributes",
2140        "rustdoc::invalid_rust_codeblocks",
2141        "rustdoc::invalid_html_tags",
2142        "rustdoc::bare_urls",
2143        "rustdoc::missing_crate_level_docs",
2144        "rustdoc::unescaped_backticks",
2145        "rustdoc::redundant_explicit_links",
2146    ],
2147}];
2148
2149pub const FEATURES: &[Lint] = &[
2150    Lint {
2151        label: "aarch64_unstable_target_feature",
2152        description: r##"# `aarch64_unstable_target_feature`
2153
2154The remaining unstable target features on aarch64.
2155
2156The tracking issue for this feature is: [#150244]
2157
2158[#150244]: https://github.com/rust-lang/rust/issues/150244
2159
2160------------------------
2161"##,
2162        default_severity: Severity::Allow,
2163        warn_since: None,
2164        deny_since: None,
2165    },
2166    Lint {
2167        label: "aarch64_ver_target_feature",
2168        description: r##"# `aarch64_ver_target_feature`
2169
2170Instruction set "version" target features on aarch64.
2171
2172The tracking issue for this feature is: [#150245]
2173
2174[#150245]: https://github.com/rust-lang/rust/issues/150245
2175
2176------------------------
2177"##,
2178        default_severity: Severity::Allow,
2179        warn_since: None,
2180        deny_since: None,
2181    },
2182    Lint {
2183        label: "abi_avr_interrupt",
2184        description: r##"# `abi_avr_interrupt`
2185
2186Allows `extern "avr-interrupt" fn()` and `extern "avr-non-blocking-interrupt" fn()`.
2187
2188The tracking issue for this feature is: [#69664]
2189
2190[#69664]: https://github.com/rust-lang/rust/issues/69664
2191
2192------------------------
2193"##,
2194        default_severity: Severity::Allow,
2195        warn_since: None,
2196        deny_since: None,
2197    },
2198    Lint {
2199        label: "abi_cmse_nonsecure_call",
2200        description: r##"# `abi_cmse_nonsecure_call`
2201
2202The tracking issue for this feature is: [#81391]
2203
2204[#81391]: https://github.com/rust-lang/rust/issues/81391
2205
2206------------------------
2207
2208The [TrustZone-M
2209feature](https://developer.arm.com/documentation/100690/latest/) is available
2210for targets with the Armv8-M architecture profile (`thumbv8m` in their target
2211name).
2212LLVM, the Rust compiler and the linker are providing
2213[support](https://developer.arm.com/documentation/ecm0359818/latest/) for the
2214TrustZone-M feature.
2215
2216One of the things provided with this unstable feature is the "cmse-nonsecure-call" function ABI.
2217This ABI is used on function pointers to non-secure code to mark a non-secure function call
2218(see [section 5.5](https://developer.arm.com/documentation/ecm0359818/latest/) for details).
2219
2220With this ABI, the compiler will do the following to perform the call:
2221* save registers needed after the call to Secure memory
2222* clear all registers that might contain confidential information
2223* clear the Least Significant Bit of the function address
2224* branches using the BLXNS instruction
2225
2226To avoid using the non-secure stack, the compiler will constrain the number and
2227type of parameters/return value.
2228
2229<!-- NOTE(ignore) this example is specific to thumbv8m targets -->
2230
2231``` rust,ignore
2232#![no_std]
2233#![feature(abi_cmse_nonsecure_call)]
2234
2235#[no_mangle]
2236pub fn call_nonsecure_function(addr: usize) -> u32 {
2237    let non_secure_function =
2238        unsafe { core::mem::transmute::<usize, extern "cmse-nonsecure-call" fn() -> u32>(addr) };
2239    non_secure_function()
2240}
2241```
2242
2243``` text
2244$ rustc --emit asm --crate-type lib --target thumbv8m.main-none-eabi function.rs
2245
2246call_nonsecure_function:
2247        .fnstart
2248        .save   {r7, lr}
2249        push    {r7, lr}
2250        .setfp  r7, sp
2251        mov     r7, sp
2252        .pad    #16
2253        sub     sp, #16
2254        str     r0, [sp, #12]
2255        ldr     r0, [sp, #12]
2256        str     r0, [sp, #8]
2257        b       .LBB0_1
2258.LBB0_1:
2259        ldr     r0, [sp, #8]
2260        push.w  {r4, r5, r6, r7, r8, r9, r10, r11}
2261        bic     r0, r0, #1
2262        mov     r1, r0
2263        mov     r2, r0
2264        mov     r3, r0
2265        mov     r4, r0
2266        mov     r5, r0
2267        mov     r6, r0
2268        mov     r7, r0
2269        mov     r8, r0
2270        mov     r9, r0
2271        mov     r10, r0
2272        mov     r11, r0
2273        mov     r12, r0
2274        msr     apsr_nzcvq, r0
2275        blxns   r0
2276        pop.w   {r4, r5, r6, r7, r8, r9, r10, r11}
2277        str     r0, [sp, #4]
2278        b       .LBB0_2
2279.LBB0_2:
2280        ldr     r0, [sp, #4]
2281        add     sp, #16
2282        pop     {r7, pc}
2283```
2284"##,
2285        default_severity: Severity::Allow,
2286        warn_since: None,
2287        deny_since: None,
2288    },
2289    Lint {
2290        label: "abi_custom",
2291        description: r##"# `abi_custom`
2292
2293Allows `extern "custom" fn()`.
2294
2295The tracking issue for this feature is: [#140829]
2296
2297[#140829]: https://github.com/rust-lang/rust/issues/140829
2298
2299------------------------
2300"##,
2301        default_severity: Severity::Allow,
2302        warn_since: None,
2303        deny_since: None,
2304    },
2305    Lint {
2306        label: "abi_gpu_kernel",
2307        description: r##"# `abi_gpu_kernel`
2308
2309Allows `extern "gpu-kernel" fn()`.
2310
2311The tracking issue for this feature is: [#135467]
2312
2313[#135467]: https://github.com/rust-lang/rust/issues/135467
2314
2315------------------------
2316"##,
2317        default_severity: Severity::Allow,
2318        warn_since: None,
2319        deny_since: None,
2320    },
2321    Lint {
2322        label: "abi_msp430_interrupt",
2323        description: r##"# `abi_msp430_interrupt`
2324
2325The tracking issue for this feature is: [#38487]
2326
2327[#38487]: https://github.com/rust-lang/rust/issues/38487
2328
2329------------------------
2330
2331In the MSP430 architecture, interrupt handlers have a special calling
2332convention. You can use the `"msp430-interrupt"` ABI to make the compiler apply
2333the right calling convention to the interrupt handlers you define.
2334
2335<!-- NOTE(ignore) this example is specific to the msp430 target -->
2336
2337``` rust,ignore
2338#![feature(abi_msp430_interrupt)]
2339#![no_std]
2340
2341// Place the interrupt handler at the appropriate memory address
2342// (Alternatively, you can use `#[used]` and remove `pub` and `#[no_mangle]`)
2343#[link_section = "__interrupt_vector_10"]
2344#[no_mangle]
2345pub static TIM0_VECTOR: extern "msp430-interrupt" fn() = tim0;
2346
2347// The interrupt handler
2348extern "msp430-interrupt" fn tim0() {
2349    // ..
2350}
2351```
2352
2353``` text
2354$ msp430-elf-objdump -CD ./target/msp430/release/app
2355Disassembly of section __interrupt_vector_10:
2356
23570000fff2 <TIM0_VECTOR>:
2358    fff2:       00 c0           interrupt service routine at 0xc000
2359
2360Disassembly of section .text:
2361
23620000c000 <int::tim0>:
2363    c000:       00 13           reti
2364```
2365"##,
2366        default_severity: Severity::Allow,
2367        warn_since: None,
2368        deny_since: None,
2369    },
2370    Lint {
2371        label: "abi_ptx",
2372        description: r##"# `abi_ptx`
2373
2374The tracking issue for this feature is: [#38788]
2375
2376[#38788]: https://github.com/rust-lang/rust/issues/38788
2377
2378------------------------
2379
2380When emitting PTX code, all vanilla Rust functions (`fn`) get translated to
2381"device" functions. These functions are *not* callable from the host via the
2382CUDA API so a crate with only device functions is not too useful!
2383
2384OTOH, "global" functions *can* be called by the host; you can think of them
2385as the real public API of your crate. To produce a global function use the
2386`"ptx-kernel"` ABI.
2387
2388<!-- NOTE(ignore) this example is specific to the nvptx targets -->
2389
2390``` rust,ignore
2391#![feature(abi_ptx)]
2392#![no_std]
2393
2394pub unsafe extern "ptx-kernel" fn global_function() {
2395    device_function();
2396}
2397
2398pub fn device_function() {
2399    // ..
2400}
2401```
2402
2403``` text
2404$ xargo rustc --target nvptx64-nvidia-cuda --release -- --emit=asm
2405
2406$ cat $(find -name '*.s')
2407//
2408// Generated by LLVM NVPTX Back-End
2409//
2410
2411.version 3.2
2412.target sm_20
2413.address_size 64
2414
2415        // .globl       _ZN6kernel15global_function17h46111ebe6516b382E
2416
2417.visible .entry _ZN6kernel15global_function17h46111ebe6516b382E()
2418{
2419
2420
2421        ret;
2422}
2423
2424        // .globl       _ZN6kernel15device_function17hd6a0e4993bbf3f78E
2425.visible .func _ZN6kernel15device_function17hd6a0e4993bbf3f78E()
2426{
2427
2428
2429        ret;
2430}
2431```
2432"##,
2433        default_severity: Severity::Allow,
2434        warn_since: None,
2435        deny_since: None,
2436    },
2437    Lint {
2438        label: "abi_riscv_interrupt",
2439        description: r##"# `abi_riscv_interrupt`
2440
2441Allows `extern "riscv-interrupt-m" fn()` and `extern "riscv-interrupt-s" fn()`.
2442
2443The tracking issue for this feature is: [#111889]
2444
2445[#111889]: https://github.com/rust-lang/rust/issues/111889
2446
2447------------------------
2448"##,
2449        default_severity: Severity::Allow,
2450        warn_since: None,
2451        deny_since: None,
2452    },
2453    Lint {
2454        label: "abi_swift",
2455        description: r##"# `abi_swift`
2456
2457Allows `extern "Swift" fn()`.
2458
2459The tracking issue for this feature is: [#156481]
2460
2461[#156481]: https://github.com/rust-lang/rust/issues/156481
2462
2463------------------------
2464"##,
2465        default_severity: Severity::Allow,
2466        warn_since: None,
2467        deny_since: None,
2468    },
2469    Lint {
2470        label: "abi_unadjusted",
2471        description: r##"# `abi_unadjusted`
2472
2473Allows using the `unadjusted` ABI; perma-unstable.
2474
2475This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
2476
2477------------------------
2478"##,
2479        default_severity: Severity::Allow,
2480        warn_since: None,
2481        deny_since: None,
2482    },
2483    Lint {
2484        label: "abi_vectorcall",
2485        description: r##"# `abi_vectorcall`
2486
2487The tracking issue for this feature is: [#124485]
2488
2489[#124485]: https://github.com/rust-lang/rust/issues/124485
2490
2491------------------------
2492
2493Adds support for the Windows `"vectorcall"` ABI, the equivalent of `__vectorcall` in MSVC.
2494
2495```rust,ignore (only-windows-or-x86-or-x86-64)
2496extern "vectorcall" {
2497    fn add_f64s(x: f64, y: f64) -> f64;
2498}
2499
2500fn main() {
2501    println!("{}", add_f64s(2.0, 4.0));
2502}
2503```
2504"##,
2505        default_severity: Severity::Allow,
2506        warn_since: None,
2507        deny_since: None,
2508    },
2509    Lint {
2510        label: "abi_x86_interrupt",
2511        description: r##"# `abi_x86_interrupt`
2512
2513Allows `extern "x86-interrupt" fn()`.
2514
2515The tracking issue for this feature is: [#40180]
2516
2517[#40180]: https://github.com/rust-lang/rust/issues/40180
2518
2519------------------------
2520"##,
2521        default_severity: Severity::Allow,
2522        warn_since: None,
2523        deny_since: None,
2524    },
2525    Lint {
2526        label: "abort_immediate",
2527        description: r##"# `abort_immediate`
2528
2529
2530
2531The tracking issue for this feature is: [#154601]
2532
2533[#154601]: https://github.com/rust-lang/rust/issues/154601
2534
2535------------------------
2536"##,
2537        default_severity: Severity::Allow,
2538        warn_since: None,
2539        deny_since: None,
2540    },
2541    Lint {
2542        label: "abort_unwind",
2543        description: r##"# `abort_unwind`
2544
2545
2546
2547The tracking issue for this feature is: [#130338]
2548
2549[#130338]: https://github.com/rust-lang/rust/issues/130338
2550
2551------------------------
2552"##,
2553        default_severity: Severity::Allow,
2554        warn_since: None,
2555        deny_since: None,
2556    },
2557    Lint {
2558        label: "acceptfilter",
2559        description: r##"# `acceptfilter`
2560
2561
2562
2563The tracking issue for this feature is: [#121891]
2564
2565[#121891]: https://github.com/rust-lang/rust/issues/121891
2566
2567------------------------
2568"##,
2569        default_severity: Severity::Allow,
2570        warn_since: None,
2571        deny_since: None,
2572    },
2573    Lint {
2574        label: "addr_parse_ascii",
2575        description: r##"# `addr_parse_ascii`
2576
2577
2578
2579The tracking issue for this feature is: [#101035]
2580
2581[#101035]: https://github.com/rust-lang/rust/issues/101035
2582
2583------------------------
2584"##,
2585        default_severity: Severity::Allow,
2586        warn_since: None,
2587        deny_since: None,
2588    },
2589    Lint {
2590        label: "adt_const_params",
2591        description: r##"# `adt_const_params`
2592
2593The tracking issue for this feature is: [#95174]
2594
2595[#95174]: https://github.com/rust-lang/rust/issues/95174
2596
2597------------------------
2598
2599Allows for using more complex types for const parameters, such as structs or enums.
2600
2601```rust
2602#![feature(adt_const_params)]
2603#![allow(incomplete_features)]
2604
2605use std::marker::ConstParamTy;
2606
2607#[derive(ConstParamTy, PartialEq, Eq)]
2608enum Foo {
2609    A,
2610    B,
2611    C,
2612}
2613
2614#[derive(ConstParamTy, PartialEq, Eq)]
2615struct Bar {
2616    flag: bool,
2617}
2618
2619fn is_foo_a_and_bar_true<const F: Foo, const B: Bar>() -> bool {
2620    match (F, B.flag) {
2621        (Foo::A, true) => true,
2622        _ => false,
2623    }
2624}
2625```
2626"##,
2627        default_severity: Severity::Allow,
2628        warn_since: None,
2629        deny_since: None,
2630    },
2631    Lint {
2632        label: "align_to_uninit_mut",
2633        description: r##"# `align_to_uninit_mut`
2634
2635
2636
2637The tracking issue for this feature is: [#139062]
2638
2639[#139062]: https://github.com/rust-lang/rust/issues/139062
2640
2641------------------------
2642"##,
2643        default_severity: Severity::Allow,
2644        warn_since: None,
2645        deny_since: None,
2646    },
2647    Lint {
2648        label: "alloc_error_handler",
2649        description: r##"# `alloc_error_handler`
2650
2651Allows defining an `#[alloc_error_handler]`.
2652
2653The tracking issue for this feature is: [#51540]
2654
2655[#51540]: https://github.com/rust-lang/rust/issues/51540
2656
2657------------------------
2658"##,
2659        default_severity: Severity::Allow,
2660        warn_since: None,
2661        deny_since: None,
2662    },
2663    Lint {
2664        label: "alloc_error_hook",
2665        description: r##"# `alloc_error_hook`
2666
2667
2668
2669The tracking issue for this feature is: [#51245]
2670
2671[#51245]: https://github.com/rust-lang/rust/issues/51245
2672
2673------------------------
2674"##,
2675        default_severity: Severity::Allow,
2676        warn_since: None,
2677        deny_since: None,
2678    },
2679    Lint {
2680        label: "alloc_internals",
2681        description: r##"# `alloc_internals`
2682
2683
2684
2685This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
2686
2687------------------------
2688"##,
2689        default_severity: Severity::Allow,
2690        warn_since: None,
2691        deny_since: None,
2692    },
2693    Lint {
2694        label: "alloc_slice_into_array",
2695        description: r##"# `alloc_slice_into_array`
2696
2697
2698
2699The tracking issue for this feature is: [#148082]
2700
2701[#148082]: https://github.com/rust-lang/rust/issues/148082
2702
2703------------------------
2704"##,
2705        default_severity: Severity::Allow,
2706        warn_since: None,
2707        deny_since: None,
2708    },
2709    Lint {
2710        label: "allocator_api",
2711        description: r##"# `allocator_api`
2712
2713The tracking issue for this feature is [#32838]
2714
2715[#32838]: https://github.com/rust-lang/rust/issues/32838
2716
2717------------------------
2718
2719Sometimes you want the memory for one collection to use a different
2720allocator than the memory for another collection. In this case,
2721replacing the global allocator is not a workable option. Instead,
2722you need to pass in an instance of an `AllocRef` to each collection
2723for which you want a custom allocator.
2724
2725TBD
2726"##,
2727        default_severity: Severity::Allow,
2728        warn_since: None,
2729        deny_since: None,
2730    },
2731    Lint {
2732        label: "allocator_internals",
2733        description: r##"# `allocator_internals`
2734
2735This feature does not have a tracking issue, it is an unstable implementation
2736detail of the `global_allocator` feature not intended for use outside the
2737compiler.
2738
2739------------------------
2740"##,
2741        default_severity: Severity::Allow,
2742        warn_since: None,
2743        deny_since: None,
2744    },
2745    Lint {
2746        label: "alloctests",
2747        description: r##"# `alloctests`
2748
2749
2750
2751This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
2752
2753------------------------
2754"##,
2755        default_severity: Severity::Allow,
2756        warn_since: None,
2757        deny_since: None,
2758    },
2759    Lint {
2760        label: "allow_internal_unsafe",
2761        description: r##"# `allow_internal_unsafe`
2762
2763Allows 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).
2764
2765This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
2766
2767------------------------
2768"##,
2769        default_severity: Severity::Allow,
2770        warn_since: None,
2771        deny_since: None,
2772    },
2773    Lint {
2774        label: "allow_internal_unstable",
2775        description: r##"# `allow_internal_unstable`
2776
2777Allows 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).
2778
2779This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
2780
2781------------------------
2782"##,
2783        default_severity: Severity::Allow,
2784        warn_since: None,
2785        deny_since: None,
2786    },
2787    Lint {
2788        label: "anonymous_lifetime_in_impl_trait",
2789        description: r##"# `anonymous_lifetime_in_impl_trait`
2790
2791Allows using anonymous lifetimes in argument-position impl-trait.
2792
2793This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
2794
2795------------------------
2796"##,
2797        default_severity: Severity::Allow,
2798        warn_since: None,
2799        deny_since: None,
2800    },
2801    Lint {
2802        label: "apx_target_feature",
2803        description: r##"# `apx_target_feature`
2804
2805The `apxf` target feature on x86
2806
2807The tracking issue for this feature is: [#139284]
2808
2809[#139284]: https://github.com/rust-lang/rust/issues/139284
2810
2811------------------------
2812"##,
2813        default_severity: Severity::Allow,
2814        warn_since: None,
2815        deny_since: None,
2816    },
2817    Lint {
2818        label: "arbitrary_self_types",
2819        description: r##"# `arbitrary_self_types`
2820
2821The tracking issue for this feature is: [#44874]
2822
2823[#44874]: https://github.com/rust-lang/rust/issues/44874
2824
2825------------------------
2826
2827Allows any type implementing `core::ops::Receiver<Target=T>` to be used as the type
2828of `self` in a method belonging to `T`.
2829
2830For example,
2831
2832```rust
2833#![feature(arbitrary_self_types)]
2834
2835struct A;
2836
2837impl A {
2838    fn f(self: SmartPtr<Self>) -> i32 { 1 }  // note self type
2839}
2840
2841struct SmartPtr<T>(T);
2842
2843impl<T> core::ops::Receiver for SmartPtr<T> {
2844    type Target = T;
2845}
2846
2847fn main() {
2848    let smart_ptr = SmartPtr(A);
2849    assert_eq!(smart_ptr.f(), 1);
2850}
2851```
2852
2853The `Receiver` trait has a blanket implementation for all `T: Deref`, so in fact
2854things like this work too:
2855
2856```rust
2857#![feature(arbitrary_self_types)]
2858
2859use std::rc::Rc;
2860
2861struct A;
2862
2863impl A {
2864    fn f(self: Rc<Self>) -> i32 { 1 } // Rc implements Deref
2865}
2866
2867fn main() {
2868    let smart_ptr = Rc::new(A);
2869    assert_eq!(smart_ptr.f(), 1);
2870}
2871```
2872
2873Interestingly, that works even without the `arbitrary_self_types` feature
2874- but that's because certain types are _effectively_ hard coded, including
2875`Rc`. ("Hard coding" isn't quite true; they use a lang-item called
2876`LegacyReceiver` to denote their special-ness in this way). With the
2877`arbitrary_self_types` feature, their special-ness goes away, and custom
2878smart pointers can achieve the same.
2879
2880## Changes to method lookup
2881
2882Method lookup previously used to work by stepping through the `Deref`
2883chain then using the resulting list of steps in two different ways:
2884
2885* To identify types that might contribute methods via their `impl`
2886  blocks (inherent methods) or via traits
2887* To identify the types that the method receiver (`a` in the above
2888  examples) can be converted to.
2889
2890With this feature, these lists are created by instead stepping through
2891the `Receiver` chain. However, a note is kept about whether the type
2892can be reached also via the `Deref` chain.
2893
2894The full chain (via `Receiver` hops) is used for the first purpose
2895(identifying relevant `impl` blocks and traits); whereas the shorter
2896list (reachable via `Deref`) is used for the second purpose. That's
2897because, to convert the method target (`a` in `a.b()`) to the self
2898type, Rust may need to be able to use `Deref::deref`. Type conversions,
2899then, can only proceed as far as the end of the `Deref` chain whereas
2900the longer `Receiver` chain can be used to explore more places where
2901useful methods might reside.
2902
2903## Types suitable for use as smart pointers
2904
2905This feature allows the creation of customised smart pointers - for example
2906your own equivalent to `Rc` or `Box` with whatever capabilities you like.
2907Those smart pointers can either implement `Deref` (if it's safe to
2908create a reference to the referent) or `Receiver` (if it isn't).
2909
2910Either way, smart pointer types should mostly _avoid having methods_.
2911Calling methods on a smart pointer leads to ambiguity about whether you're
2912aiming for a method on the pointer, or on the referent.
2913
2914Best practice is therefore to put smart pointer functionality into
2915associated functions instead - that's what's done in all the smart pointer
2916types within Rust's standard library which implement `Receiver`.
2917
2918If you choose to add any methods to your smart pointer type, your users
2919may run into errors from deshadowing, as described in the next section.
2920
2921## Avoiding shadowing
2922
2923With or without this feature, Rust emits an error if it finds two method
2924candidates, like this:
2925
2926```rust,compile_fail
2927use std::pin::Pin;
2928use std::pin::pin;
2929
2930struct A;
2931
2932impl A {
2933    fn get_ref(self: Pin<&A>) {}
2934}
2935
2936fn main() {
2937    let pinned_a: Pin<&A> = pin!(A).as_ref();
2938    let pinned_a: Pin<&A> = pinned_a.as_ref();
2939    pinned_a.get_ref(); // error[E0034]: multiple applicable items in scope
2940}
2941```
2942
2943(this is why Rust's smart pointers are mostly carefully designed to avoid
2944having methods at all, and shouldn't add new methods in future.)
2945
2946With `arbitrary_self_types`, we take care to spot some other kinds of
2947conflict:
2948
2949```rust,compile_fail
2950#![feature(arbitrary_self_types)]
2951
2952use std::pin::Pin;
2953use std::pin::pin;
2954
2955struct A;
2956
2957impl A {
2958    fn get_ref(self: &Pin<&A>) {}  // note &Pin
2959}
2960
2961fn main() {
2962    let pinned_a: Pin<&mut A> = pin!(A);
2963    let pinned_a: Pin<&A> = pinned_a.as_ref();
2964    pinned_a.get_ref();
2965}
2966```
2967
2968This is to guard against the case where an inner (referent) type has a
2969method of a given name, taking the smart pointer by reference, and then
2970the smart pointer implementer adds a similar method taking self by value.
2971As noted in the previous section, the safe option is simply
2972not to add methods to smart pointers, and then these errors can't occur.
2973"##,
2974        default_severity: Severity::Allow,
2975        warn_since: None,
2976        deny_since: None,
2977    },
2978    Lint {
2979        label: "arbitrary_self_types_pointers",
2980        description: r##"# `arbitrary_self_types_pointers`
2981
2982The tracking issue for this feature is: [#44874]
2983
2984[#38788]: https://github.com/rust-lang/rust/issues/44874
2985
2986------------------------
2987
2988This extends the [arbitrary self types] feature to allow methods to
2989receive `self` by pointer. For example:
2990
2991```rust
2992#![feature(arbitrary_self_types_pointers)]
2993
2994struct A;
2995
2996impl A {
2997    fn m(self: *const Self) {}
2998}
2999
3000fn main() {
3001    let a = A;
3002    let a_ptr: *const A = &a as *const A;
3003    a_ptr.m();
3004}
3005```
3006
3007In general this is not advised: it's thought to be better practice to wrap
3008raw pointers in a newtype wrapper which implements the `core::ops::Receiver`
3009trait, then you need "only" the `arbitrary_self_types` feature. For example:
3010
3011```rust
3012#![feature(arbitrary_self_types)]
3013#![allow(dead_code)]
3014
3015struct A;
3016
3017impl A {
3018    fn m(self: Wrapper<Self>) {} // can extract the pointer and do
3019        // what it needs
3020}
3021
3022struct Wrapper<T>(*const T);
3023
3024impl<T> core::ops::Receiver for Wrapper<T> {
3025    type Target = T;
3026}
3027
3028fn main() {
3029    let a = A;
3030    let a_ptr: *const A = &a as *const A;
3031    let a_wrapper = Wrapper(a_ptr);
3032    a_wrapper.m();
3033}
3034```
3035
3036[arbitrary self types]: arbitrary-self-types.md
3037"##,
3038        default_severity: Severity::Allow,
3039        warn_since: None,
3040        deny_since: None,
3041    },
3042    Lint {
3043        label: "arc_is_unique",
3044        description: r##"# `arc_is_unique`
3045
3046
3047
3048The tracking issue for this feature is: [#138938]
3049
3050[#138938]: https://github.com/rust-lang/rust/issues/138938
3051
3052------------------------
3053"##,
3054        default_severity: Severity::Allow,
3055        warn_since: None,
3056        deny_since: None,
3057    },
3058    Lint {
3059        label: "arm_target_feature",
3060        description: r##"# `arm_target_feature`
3061
3062Target features on arm.
3063
3064The tracking issue for this feature is: [#150246]
3065
3066[#150246]: https://github.com/rust-lang/rust/issues/150246
3067
3068------------------------
3069"##,
3070        default_severity: Severity::Allow,
3071        warn_since: None,
3072        deny_since: None,
3073    },
3074    Lint {
3075        label: "array_into_iter_constructors",
3076        description: r##"# `array_into_iter_constructors`
3077
3078
3079
3080The tracking issue for this feature is: [#91583]
3081
3082[#91583]: https://github.com/rust-lang/rust/issues/91583
3083
3084------------------------
3085"##,
3086        default_severity: Severity::Allow,
3087        warn_since: None,
3088        deny_since: None,
3089    },
3090    Lint {
3091        label: "array_ptr_get",
3092        description: r##"# `array_ptr_get`
3093
3094
3095
3096The tracking issue for this feature is: [#119834]
3097
3098[#119834]: https://github.com/rust-lang/rust/issues/119834
3099
3100------------------------
3101"##,
3102        default_severity: Severity::Allow,
3103        warn_since: None,
3104        deny_since: None,
3105    },
3106    Lint {
3107        label: "array_try_from_fn",
3108        description: r##"# `array_try_from_fn`
3109
3110
3111
3112The tracking issue for this feature is: [#89379]
3113
3114[#89379]: https://github.com/rust-lang/rust/issues/89379
3115
3116------------------------
3117"##,
3118        default_severity: Severity::Allow,
3119        warn_since: None,
3120        deny_since: None,
3121    },
3122    Lint {
3123        label: "array_try_map",
3124        description: r##"# `array_try_map`
3125
3126
3127
3128The tracking issue for this feature is: [#79711]
3129
3130[#79711]: https://github.com/rust-lang/rust/issues/79711
3131
3132------------------------
3133"##,
3134        default_severity: Severity::Allow,
3135        warn_since: None,
3136        deny_since: None,
3137    },
3138    Lint {
3139        label: "ascii_char",
3140        description: r##"# `ascii_char`
3141
3142
3143
3144The tracking issue for this feature is: [#110998]
3145
3146[#110998]: https://github.com/rust-lang/rust/issues/110998
3147
3148------------------------
3149"##,
3150        default_severity: Severity::Allow,
3151        warn_since: None,
3152        deny_since: None,
3153    },
3154    Lint {
3155        label: "ascii_char_variants",
3156        description: r##"# `ascii_char_variants`
3157
3158
3159
3160The tracking issue for this feature is: [#110998]
3161
3162[#110998]: https://github.com/rust-lang/rust/issues/110998
3163
3164------------------------
3165"##,
3166        default_severity: Severity::Allow,
3167        warn_since: None,
3168        deny_since: None,
3169    },
3170    Lint {
3171        label: "asm_experimental_arch",
3172        description: r##"# `asm_experimental_arch`
3173
3174The tracking issue for this feature is: [#93335]
3175
3176[#93335]: https://github.com/rust-lang/rust/issues/93335
3177
3178------------------------
3179
3180This feature tracks `asm!` and `global_asm!` support for the following architectures:
3181- NVPTX
3182- Hexagon
3183- MIPS32r2 and MIPS64r2
3184- wasm32
3185- BPF
3186- SPIR-V
3187- AVR
3188- MSP430
3189- M68k
3190- CSKY
3191- SPARC
3192
3193## Register classes
3194
3195| Architecture | Register class | Registers                          | LLVM constraint code |
3196| ------------ | -------------- | ---------------------------------- | -------------------- |
3197| MIPS         | `reg`          | `$[2-25]`                          | `r`                  |
3198| MIPS         | `freg`         | `$f[0-31]`                         | `f`                  |
3199| NVPTX        | `reg16`        | None\*                             | `h`                  |
3200| NVPTX        | `reg32`        | None\*                             | `r`                  |
3201| NVPTX        | `reg64`        | None\*                             | `l`                  |
3202| Hexagon      | `reg`          | `r[0-28]`                          | `r`                  |
3203| Hexagon      | `preg`         | `p[0-3]`                           | Only clobbers        |
3204| wasm32       | `local`        | None\*                             | `r`                  |
3205| BPF          | `reg`          | `r[0-10]`                          | `r`                  |
3206| BPF          | `wreg`         | `w[0-10]`                          | `w`                  |
3207| AVR          | `reg`          | `r[2-25]`, `XH`, `XL`, `ZH`, `ZL`  | `r`                  |
3208| AVR          | `reg_upper`    | `r[16-25]`, `XH`, `XL`, `ZH`, `ZL` | `d`                  |
3209| AVR          | `reg_pair`     | `r3r2` .. `r25r24`, `X`, `Z`       | `r`                  |
3210| AVR          | `reg_iw`       | `r25r24`, `X`, `Z`                 | `w`                  |
3211| AVR          | `reg_ptr`      | `X`, `Z`                           | `e`                  |
3212| MSP430       | `reg`          | `r[0-15]`                          | `r`                  |
3213| M68k         | `reg`          | `d[0-7]`, `a[0-7]`                 | `r`                  |
3214| M68k         | `reg_data`     | `d[0-7]`                           | `d`                  |
3215| M68k         | `reg_addr`     | `a[0-3]`                           | `a`                  |
3216| CSKY         | `reg`          | `r[0-31]`                          | `r`                  |
3217| CSKY         | `freg`         | `f[0-31]`                          | `f`                  |
3218| SPARC        | `reg`          | `r[2-29]`                          | `r`                  |
3219| SPARC        | `yreg`         | `y`                                | Only clobbers        |
3220
3221> **Notes**:
3222> - NVPTX doesn't have a fixed register set, so named registers are not supported.
3223>
3224> - WebAssembly doesn't have registers, so named registers are not supported.
3225
3226# Register class supported types
3227
3228| Architecture | Register class                  | Target feature | Allowed types                           |
3229| ------------ | ------------------------------- | -------------- | --------------------------------------- |
3230| MIPS32       | `reg`                           | None           | `i8`, `i16`, `i32`, `f32`               |
3231| MIPS32       | `freg`                          | None           | `f32`, `f64`                            |
3232| MIPS64       | `reg`                           | None           | `i8`, `i16`, `i32`, `i64`, `f32`, `f64` |
3233| MIPS64       | `freg`                          | None           | `f32`, `f64`                            |
3234| NVPTX        | `reg16`                         | None           | `i8`, `i16`                             |
3235| NVPTX        | `reg32`                         | None           | `i8`, `i16`, `i32`, `f32`               |
3236| NVPTX        | `reg64`                         | None           | `i8`, `i16`, `i32`, `f32`, `i64`, `f64` |
3237| Hexagon      | `reg`                           | None           | `i8`, `i16`, `i32`, `f32`               |
3238| Hexagon      | `preg`                          | N/A            | Only clobbers                           |
3239| wasm32       | `local`                         | None           | `i8` `i16` `i32` `i64` `f32` `f64`      |
3240| BPF          | `reg`                           | None           | `i8` `i16` `i32` `i64`                  |
3241| BPF          | `wreg`                          | `alu32`        | `i8` `i16` `i32`                        |
3242| AVR          | `reg`, `reg_upper`              | None           | `i8`                                    |
3243| AVR          | `reg_pair`, `reg_iw`, `reg_ptr` | None           | `i16`                                   |
3244| MSP430       | `reg`                           | None           | `i8`, `i16`                             |
3245| M68k         | `reg`, `reg_addr`               | None           | `i16`, `i32`                            |
3246| M68k         | `reg_data`                      | None           | `i8`, `i16`, `i32`                      |
3247| CSKY         | `reg`                           | None           | `i8`, `i16`, `i32`                      |
3248| CSKY         | `freg`                          | None           | `f32`,                                  |
3249| SPARC        | `reg`                           | None           | `i8`, `i16`, `i32`, `i64` (SPARC64 only) |
3250| SPARC        | `yreg`                          | N/A            | Only clobbers                           |
3251
3252## Register aliases
3253
3254| Architecture | Base register | Aliases   |
3255| ------------ | ------------- | --------- |
3256| Hexagon      | `r29`         | `sp`      |
3257| Hexagon      | `r30`         | `fr`      |
3258| Hexagon      | `r31`         | `lr`      |
3259| BPF          | `r[0-10]`     | `w[0-10]` |
3260| AVR          | `XH`          | `r27`     |
3261| AVR          | `XL`          | `r26`     |
3262| AVR          | `ZH`          | `r31`     |
3263| AVR          | `ZL`          | `r30`     |
3264| MSP430       | `r0`          | `pc`      |
3265| MSP430       | `r1`          | `sp`      |
3266| MSP430       | `r2`          | `sr`      |
3267| MSP430       | `r3`          | `cg`      |
3268| MSP430       | `r4`          | `fp`      |
3269| M68k         | `a5`          | `bp`      |
3270| M68k         | `a6`          | `fp`      |
3271| M68k         | `a7`          | `sp`, `usp`, `ssp`, `isp` |
3272| CSKY         | `r[0-3]`      | `a[0-3]`  |
3273| CSKY         | `r[4-11]`     | `l[0-7]`  |
3274| CSKY         | `r[12-13]`    | `t[0-1]`  |
3275| CSKY         | `r14`         | `sp`      |
3276| CSKY         | `r15`         | `lr`      |
3277| CSKY         | `r[16-17]`    | `l[8-9]`  |
3278| CSKY         | `r[18-25]`    | `t[2-9]`  |
3279| CSKY         | `r28`         | `rgb`     |
3280| CSKY         | `r29`         | `rtb`     |
3281| CSKY         | `r30`         | `svbr`    |
3282| CSKY         | `r31`         | `tls`     |
3283| SPARC        | `r[0-7]`      | `g[0-7]`  |
3284| SPARC        | `r[8-15]`     | `o[0-7]`  |
3285| SPARC        | `r[16-23]`    | `l[0-7]`  |
3286| SPARC        | `r[24-31]`    | `i[0-7]`  |
3287
3288> **Notes**:
3289> - TI does not mandate a frame pointer for MSP430, but toolchains are allowed
3290    to use one; LLVM uses `r4`.
3291
3292## Unsupported registers
3293
3294| Architecture | Unsupported register                    | Reason                                                                                                                                                                              |
3295| ------------ | --------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
3296| All          | `sp`, `r14`/`o6` (SPARC)                | The stack pointer must be restored to its original value at the end of an asm code block.                                                                                           |
3297| 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.                                                             |
3298| All          | `r19` (Hexagon) | These are used internally by LLVM as "base pointer" for functions with complex stack frames.                                                                              |
3299| MIPS         | `$0` or `$zero`                         | This is a constant zero register which can't be modified.                                                                                                                           |
3300| MIPS         | `$1` or `$at`                           | Reserved for assembler.                                                                                                                                                             |
3301| MIPS         | `$26`/`$k0`, `$27`/`$k1`                | OS-reserved registers.                                                                                                                                                              |
3302| MIPS         | `$28`/`$gp`                             | Global pointer cannot be used as inputs or outputs.                                                                                                                                 |
3303| MIPS         | `$ra`                                   | Return address cannot be used as inputs or outputs.                                                                                                                                 |
3304| Hexagon      | `lr`                                    | This is the link register which cannot be used as an input or output.                                                                                                               |
3305| 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. |
3306|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.                          |
3307| M68k         | `a4`, `a5`                              | Used internally by LLVM for the base pointer and global base pointer. |
3308| CSKY         | `r7`, `r28`                             | Used internally by LLVM for the base pointer and global base pointer. |
3309| CSKY         | `r8`                                    | Used internally by LLVM for the frame pointer. |
3310| CSKY         | `r14`                                   | Used internally by LLVM for the stack pointer. |
3311| CSKY         | `r15`                                   | This is the link register. |
3312| CSKY         | `r[26-30]`                              | Reserved by its ABI.       |
3313| CSKY         | `r31`                                   | This is the TLS register.  |
3314| SPARC        | `r0`/`g0`                               | This is always zero and cannot be used as inputs or outputs. |
3315| SPARC        | `r1`/`g1`                               | Used internally by LLVM. |
3316| SPARC        | `r5`/`g5`                               | Reserved for system. (SPARC32 only) |
3317| SPARC        | `r6`/`g6`, `r7`/`g7`                    | Reserved for system. |
3318| SPARC        | `r31`/`i7`                              | Return address cannot be used as inputs or outputs. |
3319
3320
3321## Template modifiers
3322
3323| Architecture | Register class | Modifier | Example output | LLVM modifier |
3324| ------------ | -------------- | -------- | -------------- | ------------- |
3325| MIPS         | `reg`          | None     | `$2`           | None          |
3326| MIPS         | `freg`         | None     | `$f0`          | None          |
3327| NVPTX        | `reg16`        | None     | `rs0`          | None          |
3328| NVPTX        | `reg32`        | None     | `r0`           | None          |
3329| NVPTX        | `reg64`        | None     | `rd0`          | None          |
3330| Hexagon      | `reg`          | None     | `r0`           | None          |
3331| SPARC        | `reg`          | None     | `%o0`          | None          |
3332| CSKY         | `reg`          | None     | `r0`           | None          |
3333| CSKY         | `freg`         | None     | `f0`           | None          |
3334
3335# Flags covered by `preserves_flags`
3336
3337These flags registers must be restored upon exiting the asm block if the `preserves_flags` option is set:
3338- AVR
3339  - The status register `SREG`.
3340- MSP430
3341  - The status register `r2`.
3342- M68k
3343  - The condition code register `ccr`.
3344- SPARC
3345  - Integer condition codes (`icc` and `xcc`)
3346  - Floating-point condition codes (`fcc[0-3]`)
3347- CSKY
3348  - Condition/carry bit (C) in `PSR`.
3349"##,
3350        default_severity: Severity::Allow,
3351        warn_since: None,
3352        deny_since: None,
3353    },
3354    Lint {
3355        label: "asm_experimental_reg",
3356        description: r##"# `asm_experimental_arch`
3357
3358The tracking issue for this feature is: [#133416]
3359
3360[#133416]: https://github.com/rust-lang/rust/issues/133416
3361
3362------------------------
3363
3364This tracks support for additional registers in architectures where inline assembly is already stable.
3365
3366## Register classes
3367
3368| Architecture | Register class | Registers | LLVM constraint code |
3369| ------------ | -------------- | --------- | -------------------- |
3370
3371## Register class supported types
3372
3373| Architecture | Register class | Target feature | Allowed types |
3374| ------------ | -------------- | -------------- | ------------- |
3375| x86 | `xmm_reg` | `sse` | `i128` |
3376| x86 | `ymm_reg` | `avx` | `i128` |
3377| x86 | `zmm_reg` | `avx512f` | `i128` |
3378
3379## Register aliases
3380
3381| Architecture | Base register | Aliases |
3382| ------------ | ------------- | ------- |
3383
3384## Unsupported registers
3385
3386| Architecture | Unsupported register | Reason |
3387| ------------ | -------------------- | ------ |
3388
3389## Template modifiers
3390
3391| Architecture | Register class | Modifier | Example output | LLVM modifier |
3392| ------------ | -------------- | -------- | -------------- | ------------- |
3393"##,
3394        default_severity: Severity::Allow,
3395        warn_since: None,
3396        deny_since: None,
3397    },
3398    Lint {
3399        label: "asm_goto_with_outputs",
3400        description: r##"# `asm_goto_with_outputs`
3401
3402The tracking issue for this feature is: [#119364]
3403
3404[#119364]: https://github.com/rust-lang/rust/issues/119364
3405
3406------------------------
3407
3408This feature allows label operands to be used together with output operands.
3409
3410Example:
3411```rust,ignore (partial-example, x86-only)
3412
3413unsafe {
3414    let a: usize;
3415    asm!(
3416        "mov {}, 1"
3417        "jmp {}",
3418        out(reg) a,
3419        label {
3420            println!("Jumped from asm {}!", a);
3421        }
3422    );
3423}
3424```
3425
3426The output operands are assigned before the label blocks are executed.
3427"##,
3428        default_severity: Severity::Allow,
3429        warn_since: None,
3430        deny_since: None,
3431    },
3432    Lint {
3433        label: "asm_unwind",
3434        description: r##"# `asm_unwind`
3435
3436The tracking issue for this feature is: [#93334]
3437
3438[#93334]: https://github.com/rust-lang/rust/issues/93334
3439
3440------------------------
3441
3442This 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.
3443"##,
3444        default_severity: Severity::Allow,
3445        warn_since: None,
3446        deny_since: None,
3447    },
3448    Lint {
3449        label: "associated_type_defaults",
3450        description: r##"# `associated_type_defaults`
3451
3452Allows associated type defaults.
3453
3454The tracking issue for this feature is: [#29661]
3455
3456[#29661]: https://github.com/rust-lang/rust/issues/29661
3457
3458------------------------
3459"##,
3460        default_severity: Severity::Allow,
3461        warn_since: None,
3462        deny_since: None,
3463    },
3464    Lint {
3465        label: "async_drop",
3466        description: r##"# `async_drop`
3467
3468Allows implementing `AsyncDrop`.
3469
3470The tracking issue for this feature is: [#126482]
3471
3472[#126482]: https://github.com/rust-lang/rust/issues/126482
3473
3474------------------------
3475"##,
3476        default_severity: Severity::Allow,
3477        warn_since: None,
3478        deny_since: None,
3479    },
3480    Lint {
3481        label: "async_fn_in_dyn_trait",
3482        description: r##"# `async_fn_in_dyn_trait`
3483
3484Allows async functions to be called from `dyn Trait`.
3485
3486The tracking issue for this feature is: [#133119]
3487
3488[#133119]: https://github.com/rust-lang/rust/issues/133119
3489
3490------------------------
3491"##,
3492        default_severity: Severity::Allow,
3493        warn_since: None,
3494        deny_since: None,
3495    },
3496    Lint {
3497        label: "async_fn_track_caller",
3498        description: r##"# `async_fn_track_caller`
3499
3500Allows `#[track_caller]` on async functions.
3501
3502The tracking issue for this feature is: [#110011]
3503
3504[#110011]: https://github.com/rust-lang/rust/issues/110011
3505
3506------------------------
3507"##,
3508        default_severity: Severity::Allow,
3509        warn_since: None,
3510        deny_since: None,
3511    },
3512    Lint {
3513        label: "async_fn_traits",
3514        description: r##"# `async_fn_traits`
3515
3516See Also: [`fn_traits`](../library-features/fn-traits.md)
3517
3518----
3519
3520The `async_fn_traits` feature allows for implementation of the [`AsyncFn*`] traits
3521for creating custom closure-like types that return futures.
3522
3523[`AsyncFn*`]: ../../std/ops/trait.AsyncFn.html
3524
3525The main difference to the `Fn*` family of traits is that `AsyncFn` can return a future
3526that borrows from itself (`FnOnce::Output` has no lifetime parameters, while `AsyncFnMut::CallRefFuture` does).
3527"##,
3528        default_severity: Severity::Allow,
3529        warn_since: None,
3530        deny_since: None,
3531    },
3532    Lint {
3533        label: "async_for_loop",
3534        description: r##"# `async_for_loop`
3535
3536Allows `for await` loops.
3537
3538The tracking issue for this feature is: [#118898]
3539
3540[#118898]: https://github.com/rust-lang/rust/issues/118898
3541
3542------------------------
3543"##,
3544        default_severity: Severity::Allow,
3545        warn_since: None,
3546        deny_since: None,
3547    },
3548    Lint {
3549        label: "async_gen_internals",
3550        description: r##"# `async_gen_internals`
3551
3552
3553
3554This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
3555
3556------------------------
3557"##,
3558        default_severity: Severity::Allow,
3559        warn_since: None,
3560        deny_since: None,
3561    },
3562    Lint {
3563        label: "async_iter_from_iter",
3564        description: r##"# `async_iter_from_iter`
3565
3566
3567
3568The tracking issue for this feature is: [#81798]
3569
3570[#81798]: https://github.com/rust-lang/rust/issues/81798
3571
3572------------------------
3573"##,
3574        default_severity: Severity::Allow,
3575        warn_since: None,
3576        deny_since: None,
3577    },
3578    Lint {
3579        label: "async_iterator",
3580        description: r##"# `async_iterator`
3581
3582
3583
3584The tracking issue for this feature is: [#79024]
3585
3586[#79024]: https://github.com/rust-lang/rust/issues/79024
3587
3588------------------------
3589"##,
3590        default_severity: Severity::Allow,
3591        warn_since: None,
3592        deny_since: None,
3593    },
3594    Lint {
3595        label: "async_trait_bounds",
3596        description: r##"# `async_trait_bounds`
3597
3598Allows `async` trait bound modifier.
3599
3600The tracking issue for this feature is: [#62290]
3601
3602[#62290]: https://github.com/rust-lang/rust/issues/62290
3603
3604------------------------
3605"##,
3606        default_severity: Severity::Allow,
3607        warn_since: None,
3608        deny_since: None,
3609    },
3610    Lint {
3611        label: "atomic_from_mut",
3612        description: r##"# `atomic_from_mut`
3613
3614
3615
3616The tracking issue for this feature is: [#76314]
3617
3618[#76314]: https://github.com/rust-lang/rust/issues/76314
3619
3620------------------------
3621"##,
3622        default_severity: Severity::Allow,
3623        warn_since: None,
3624        deny_since: None,
3625    },
3626    Lint {
3627        label: "atomic_internals",
3628        description: r##"# `atomic_internals`
3629
3630
3631
3632This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
3633
3634------------------------
3635"##,
3636        default_severity: Severity::Allow,
3637        warn_since: None,
3638        deny_since: None,
3639    },
3640    Lint {
3641        label: "atomic_ptr_null",
3642        description: r##"# `atomic_ptr_null`
3643
3644
3645
3646The tracking issue for this feature is: [#150733]
3647
3648[#150733]: https://github.com/rust-lang/rust/issues/150733
3649
3650------------------------
3651"##,
3652        default_severity: Severity::Allow,
3653        warn_since: None,
3654        deny_since: None,
3655    },
3656    Lint {
3657        label: "auto_traits",
3658        description: r##"# `auto_traits`
3659
3660The tracking issue for this feature is [#13231]
3661
3662[#13231]: https://github.com/rust-lang/rust/issues/13231
3663
3664----
3665
3666The `auto_traits` feature gate allows you to define auto traits.
3667
3668Auto traits, like [`Send`] or [`Sync`] in the standard library, are marker traits
3669that are automatically implemented for every type, unless the type, or a type it contains,
3670has explicitly opted out via a negative impl. (Negative impls are separately controlled
3671by the `negative_impls` feature.)
3672
3673[`Send`]: ../../std/marker/trait.Send.html
3674[`Sync`]: ../../std/marker/trait.Sync.html
3675
3676```rust,ignore (partial-example)
3677impl !Trait for Type {}
3678```
3679
3680Example:
3681
3682```rust
3683#![feature(negative_impls)]
3684#![feature(auto_traits)]
3685
3686auto trait Valid {}
3687
3688struct True;
3689struct False;
3690
3691impl !Valid for False {}
3692
3693struct MaybeValid<T>(T);
3694
3695fn must_be_valid<T: Valid>(_t: T) { }
3696
3697fn main() {
3698    // works
3699    must_be_valid( MaybeValid(True) );
3700
3701    // compiler error - trait bound not satisfied
3702    // must_be_valid( MaybeValid(False) );
3703}
3704```
3705
3706## Automatic trait implementations
3707
3708When a type is declared as an `auto trait`, we will automatically
3709create impls for every struct/enum/union, unless an explicit impl is
3710provided. These automatic impls contain a where clause for each field
3711of the form `T: AutoTrait`, where `T` is the type of the field and
3712`AutoTrait` is the auto trait in question. As an example, consider the
3713struct `List` and the auto trait `Send`:
3714
3715```rust
3716struct List<T> {
3717  data: T,
3718  next: Option<Box<List<T>>>,
3719}
3720```
3721
3722Presuming that there is no explicit impl of `Send` for `List`, the
3723compiler will supply an automatic impl of the form:
3724
3725```rust
3726struct List<T> {
3727  data: T,
3728  next: Option<Box<List<T>>>,
3729}
3730
3731unsafe impl<T> Send for List<T>
3732where
3733  T: Send, // from the field `data`
3734  Option<Box<List<T>>>: Send, // from the field `next`
3735{ }
3736```
3737
3738Explicit impls may be either positive or negative. They take the form:
3739
3740```rust,ignore (partial-example)
3741impl<...> AutoTrait for StructName<..> { }
3742impl<...> !AutoTrait for StructName<..> { }
3743```
3744
3745## Coinduction: Auto traits permit cyclic matching
3746
3747Unlike ordinary trait matching, auto traits are **coinductive**. This
3748means, in short, that cycles which occur in trait matching are
3749considered ok. As an example, consider the recursive struct `List`
3750introduced in the previous section. In attempting to determine whether
3751`List: Send`, we would wind up in a cycle: to apply the impl, we must
3752show that `Option<Box<List>>: Send`, which will in turn require
3753`Box<List>: Send` and then finally `List: Send` again. Under ordinary
3754trait matching, this cycle would be an error, but for an auto trait it
3755is considered a successful match.
3756
3757## Items
3758
3759Auto traits cannot have any trait items, such as methods or associated types. This ensures that we can generate default implementations.
3760
3761## Supertraits
3762
3763Auto traits cannot have supertraits. This is for soundness reasons, as the interaction of coinduction with implied bounds is difficult to reconcile.
3764"##,
3765        default_severity: Severity::Allow,
3766        warn_since: None,
3767        deny_since: None,
3768    },
3769    Lint {
3770        label: "autodiff",
3771        description: r##"# `autodiff`
3772
3773
3774
3775The tracking issue for this feature is: [#124509]
3776
3777[#124509]: https://github.com/rust-lang/rust/issues/124509
3778
3779------------------------
3780"##,
3781        default_severity: Severity::Allow,
3782        warn_since: None,
3783        deny_since: None,
3784    },
3785    Lint {
3786        label: "avr_target_feature",
3787        description: r##"# `avr_target_feature`
3788
3789Target features on avr.
3790
3791The tracking issue for this feature is: [#146889]
3792
3793[#146889]: https://github.com/rust-lang/rust/issues/146889
3794
3795------------------------
3796"##,
3797        default_severity: Severity::Allow,
3798        warn_since: None,
3799        deny_since: None,
3800    },
3801    Lint {
3802        label: "avx10_target_feature",
3803        description: r##"# `avx10_target_feature`
3804
3805Allows using Intel AVX10 target features and intrinsics
3806
3807The tracking issue for this feature is: [#138843]
3808
3809[#138843]: https://github.com/rust-lang/rust/issues/138843
3810
3811------------------------
3812"##,
3813        default_severity: Severity::Allow,
3814        warn_since: None,
3815        deny_since: None,
3816    },
3817    Lint {
3818        label: "backtrace_frames",
3819        description: r##"# `backtrace_frames`
3820
3821
3822
3823The tracking issue for this feature is: [#79676]
3824
3825[#79676]: https://github.com/rust-lang/rust/issues/79676
3826
3827------------------------
3828"##,
3829        default_severity: Severity::Allow,
3830        warn_since: None,
3831        deny_since: None,
3832    },
3833    Lint {
3834        label: "bikeshed_guaranteed_no_drop",
3835        description: r##"# `bikeshed_guaranteed_no_drop`
3836
3837
3838
3839This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
3840
3841------------------------
3842"##,
3843        default_severity: Severity::Allow,
3844        warn_since: None,
3845        deny_since: None,
3846    },
3847    Lint {
3848        label: "binary_heap_as_mut_slice",
3849        description: r##"# `binary_heap_as_mut_slice`
3850
3851
3852
3853The tracking issue for this feature is: [#154009]
3854
3855[#154009]: https://github.com/rust-lang/rust/issues/154009
3856
3857------------------------
3858"##,
3859        default_severity: Severity::Allow,
3860        warn_since: None,
3861        deny_since: None,
3862    },
3863    Lint {
3864        label: "binary_heap_drain_sorted",
3865        description: r##"# `binary_heap_drain_sorted`
3866
3867
3868
3869The tracking issue for this feature is: [#59278]
3870
3871[#59278]: https://github.com/rust-lang/rust/issues/59278
3872
3873------------------------
3874"##,
3875        default_severity: Severity::Allow,
3876        warn_since: None,
3877        deny_since: None,
3878    },
3879    Lint {
3880        label: "binary_heap_from_raw_vec",
3881        description: r##"# `binary_heap_from_raw_vec`
3882
3883
3884
3885The tracking issue for this feature is: [#152500]
3886
3887[#152500]: https://github.com/rust-lang/rust/issues/152500
3888
3889------------------------
3890"##,
3891        default_severity: Severity::Allow,
3892        warn_since: None,
3893        deny_since: None,
3894    },
3895    Lint {
3896        label: "binary_heap_into_iter_sorted",
3897        description: r##"# `binary_heap_into_iter_sorted`
3898
3899
3900
3901The tracking issue for this feature is: [#59278]
3902
3903[#59278]: https://github.com/rust-lang/rust/issues/59278
3904
3905------------------------
3906"##,
3907        default_severity: Severity::Allow,
3908        warn_since: None,
3909        deny_since: None,
3910    },
3911    Lint {
3912        label: "binary_heap_peek_mut_refresh",
3913        description: r##"# `binary_heap_peek_mut_refresh`
3914
3915
3916
3917The tracking issue for this feature is: [#138355]
3918
3919[#138355]: https://github.com/rust-lang/rust/issues/138355
3920
3921------------------------
3922"##,
3923        default_severity: Severity::Allow,
3924        warn_since: None,
3925        deny_since: None,
3926    },
3927    Lint {
3928        label: "binary_heap_pop_if",
3929        description: r##"# `binary_heap_pop_if`
3930
3931
3932
3933The tracking issue for this feature is: [#151828]
3934
3935[#151828]: https://github.com/rust-lang/rust/issues/151828
3936
3937------------------------
3938"##,
3939        default_severity: Severity::Allow,
3940        warn_since: None,
3941        deny_since: None,
3942    },
3943    Lint {
3944        label: "borrowed_buf_init",
3945        description: r##"# `borrowed_buf_init`
3946
3947
3948
3949The tracking issue for this feature is: [#78485]
3950
3951[#78485]: https://github.com/rust-lang/rust/issues/78485
3952
3953------------------------
3954"##,
3955        default_severity: Severity::Allow,
3956        warn_since: None,
3957        deny_since: None,
3958    },
3959    Lint {
3960        label: "bound_as_ref",
3961        description: r##"# `bound_as_ref`
3962
3963
3964
3965The tracking issue for this feature is: [#80996]
3966
3967[#80996]: https://github.com/rust-lang/rust/issues/80996
3968
3969------------------------
3970"##,
3971        default_severity: Severity::Allow,
3972        warn_since: None,
3973        deny_since: None,
3974    },
3975    Lint {
3976        label: "bound_copied",
3977        description: r##"# `bound_copied`
3978
3979
3980
3981The tracking issue for this feature is: [#145966]
3982
3983[#145966]: https://github.com/rust-lang/rust/issues/145966
3984
3985------------------------
3986"##,
3987        default_severity: Severity::Allow,
3988        warn_since: None,
3989        deny_since: None,
3990    },
3991    Lint {
3992        label: "box_as_ptr",
3993        description: r##"# `box_as_ptr`
3994
3995
3996
3997The tracking issue for this feature is: [#129090]
3998
3999[#129090]: https://github.com/rust-lang/rust/issues/129090
4000
4001------------------------
4002"##,
4003        default_severity: Severity::Allow,
4004        warn_since: None,
4005        deny_since: None,
4006    },
4007    Lint {
4008        label: "box_into_boxed_slice",
4009        description: r##"# `box_into_boxed_slice`
4010
4011
4012
4013The tracking issue for this feature is: [#71582]
4014
4015[#71582]: https://github.com/rust-lang/rust/issues/71582
4016
4017------------------------
4018"##,
4019        default_severity: Severity::Allow,
4020        warn_since: None,
4021        deny_since: None,
4022    },
4023    Lint {
4024        label: "box_into_inner",
4025        description: r##"# `box_into_inner`
4026
4027
4028
4029The tracking issue for this feature is: [#80437]
4030
4031[#80437]: https://github.com/rust-lang/rust/issues/80437
4032
4033------------------------
4034"##,
4035        default_severity: Severity::Allow,
4036        warn_since: None,
4037        deny_since: None,
4038    },
4039    Lint {
4040        label: "box_patterns",
4041        description: r##"# `box_patterns`
4042
4043The tracking issue for this feature is: [#29641]
4044
4045[#29641]: https://github.com/rust-lang/rust/issues/29641
4046
4047------------------------
4048
4049> **Note**: This feature will be superseded by [`deref_patterns`] in the future.
4050
4051Box patterns let you match on `Box<T>`s:
4052
4053
4054```rust
4055#![feature(box_patterns)]
4056
4057fn main() {
4058    let b = Some(Box::new(5));
4059    match b {
4060        Some(box n) if n < 0 => {
4061            println!("Box contains negative number {n}");
4062        },
4063        Some(box n) if n >= 0 => {
4064            println!("Box contains non-negative number {n}");
4065        },
4066        None => {
4067            println!("No box");
4068        },
4069        _ => unreachable!()
4070    }
4071}
4072```
4073
4074[`deref_patterns`]: ./deref-patterns.md
4075"##,
4076        default_severity: Severity::Allow,
4077        warn_since: None,
4078        deny_since: None,
4079    },
4080    Lint {
4081        label: "box_take",
4082        description: r##"# `box_take`
4083
4084
4085
4086The tracking issue for this feature is: [#147212]
4087
4088[#147212]: https://github.com/rust-lang/rust/issues/147212
4089
4090------------------------
4091"##,
4092        default_severity: Severity::Allow,
4093        warn_since: None,
4094        deny_since: None,
4095    },
4096    Lint {
4097        label: "box_vec_non_null",
4098        description: r##"# `box_vec_non_null`
4099
4100
4101
4102The tracking issue for this feature is: [#130364]
4103
4104[#130364]: https://github.com/rust-lang/rust/issues/130364
4105
4106------------------------
4107"##,
4108        default_severity: Severity::Allow,
4109        warn_since: None,
4110        deny_since: None,
4111    },
4112    Lint {
4113        label: "bpf_target_feature",
4114        description: r##"# `bpf_target_feature`
4115
4116Target features on bpf.
4117
4118The tracking issue for this feature is: [#150247]
4119
4120[#150247]: https://github.com/rust-lang/rust/issues/150247
4121
4122------------------------
4123"##,
4124        default_severity: Severity::Allow,
4125        warn_since: None,
4126        deny_since: None,
4127    },
4128    Lint {
4129        label: "breakpoint",
4130        description: r##"# `breakpoint`
4131
4132
4133
4134The tracking issue for this feature is: [#133724]
4135
4136[#133724]: https://github.com/rust-lang/rust/issues/133724
4137
4138------------------------
4139"##,
4140        default_severity: Severity::Allow,
4141        warn_since: None,
4142        deny_since: None,
4143    },
4144    Lint {
4145        label: "bstr",
4146        description: r##"# `bstr`
4147
4148
4149
4150The tracking issue for this feature is: [#134915]
4151
4152[#134915]: https://github.com/rust-lang/rust/issues/134915
4153
4154------------------------
4155"##,
4156        default_severity: Severity::Allow,
4157        warn_since: None,
4158        deny_since: None,
4159    },
4160    Lint {
4161        label: "bstr_internals",
4162        description: r##"# `bstr_internals`
4163
4164
4165
4166This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
4167
4168------------------------
4169"##,
4170        default_severity: Severity::Allow,
4171        warn_since: None,
4172        deny_since: None,
4173    },
4174    Lint {
4175        label: "btree_cursors",
4176        description: r##"# `btree_cursors`
4177
4178
4179
4180The tracking issue for this feature is: [#107540]
4181
4182[#107540]: https://github.com/rust-lang/rust/issues/107540
4183
4184------------------------
4185"##,
4186        default_severity: Severity::Allow,
4187        warn_since: None,
4188        deny_since: None,
4189    },
4190    Lint {
4191        label: "btree_merge",
4192        description: r##"# `btree_merge`
4193
4194
4195
4196The tracking issue for this feature is: [#152152]
4197
4198[#152152]: https://github.com/rust-lang/rust/issues/152152
4199
4200------------------------
4201"##,
4202        default_severity: Severity::Allow,
4203        warn_since: None,
4204        deny_since: None,
4205    },
4206    Lint {
4207        label: "btree_set_entry",
4208        description: r##"# `btree_set_entry`
4209
4210
4211
4212The tracking issue for this feature is: [#133549]
4213
4214[#133549]: https://github.com/rust-lang/rust/issues/133549
4215
4216------------------------
4217"##,
4218        default_severity: Severity::Allow,
4219        warn_since: None,
4220        deny_since: None,
4221    },
4222    Lint {
4223        label: "btreemap_alloc",
4224        description: r##"# `btreemap_alloc`
4225
4226
4227
4228The tracking issue for this feature is: [#32838]
4229
4230[#32838]: https://github.com/rust-lang/rust/issues/32838
4231
4232------------------------
4233"##,
4234        default_severity: Severity::Allow,
4235        warn_since: None,
4236        deny_since: None,
4237    },
4238    Lint {
4239        label: "buf_read_has_data_left",
4240        description: r##"# `buf_read_has_data_left`
4241
4242
4243
4244The tracking issue for this feature is: [#86423]
4245
4246[#86423]: https://github.com/rust-lang/rust/issues/86423
4247
4248------------------------
4249"##,
4250        default_severity: Severity::Allow,
4251        warn_since: None,
4252        deny_since: None,
4253    },
4254    Lint {
4255        label: "bufreader_peek",
4256        description: r##"# `bufreader_peek`
4257
4258
4259
4260The tracking issue for this feature is: [#128405]
4261
4262[#128405]: https://github.com/rust-lang/rust/issues/128405
4263
4264------------------------
4265"##,
4266        default_severity: Severity::Allow,
4267        warn_since: None,
4268        deny_since: None,
4269    },
4270    Lint {
4271        label: "builtin_syntax",
4272        description: r##"# `builtin_syntax`
4273
4274Allows builtin # foo() syntax
4275
4276The tracking issue for this feature is: [#110680]
4277
4278[#110680]: https://github.com/rust-lang/rust/issues/110680
4279
4280------------------------
4281"##,
4282        default_severity: Severity::Allow,
4283        warn_since: None,
4284        deny_since: None,
4285    },
4286    Lint {
4287        label: "c_size_t",
4288        description: r##"# `c_size_t`
4289
4290
4291
4292The tracking issue for this feature is: [#88345]
4293
4294[#88345]: https://github.com/rust-lang/rust/issues/88345
4295
4296------------------------
4297"##,
4298        default_severity: Severity::Allow,
4299        warn_since: None,
4300        deny_since: None,
4301    },
4302    Lint {
4303        label: "c_variadic",
4304        description: r##"# `c_variadic`
4305
4306The tracking issue for this feature is: [#44930]
4307
4308[#44930]: https://github.com/rust-lang/rust/issues/44930
4309
4310------------------------
4311
4312The `c_variadic` language feature enables C-variadic functions to be
4313defined in Rust. They may be called both from within Rust and via FFI.
4314
4315## Examples
4316
4317```rust
4318#![feature(c_variadic)]
4319
4320pub unsafe extern "C" fn add(n: usize, mut args: ...) -> usize {
4321    let mut sum = 0;
4322    for _ in 0..n {
4323        sum += args.next_arg::<usize>();
4324    }
4325    sum
4326}
4327```
4328"##,
4329        default_severity: Severity::Allow,
4330        warn_since: None,
4331        deny_since: None,
4332    },
4333    Lint {
4334        label: "c_variadic_experimental_arch",
4335        description: r##"# `c_variadic_experimental_arch`
4336
4337Allows defining c-variadic functions on targets where this feature has not yet undergone sufficient testing for stabilization.
4338
4339The tracking issue for this feature is: [#155973]
4340
4341[#155973]: https://github.com/rust-lang/rust/issues/155973
4342
4343------------------------
4344"##,
4345        default_severity: Severity::Allow,
4346        warn_since: None,
4347        deny_since: None,
4348    },
4349    Lint {
4350        label: "c_variadic_naked_functions",
4351        description: r##"# `c_variadic_naked_functions`
4352
4353Allows defining c-variadic naked functions with any extern ABI that is allowed on c-variadic foreign functions.
4354
4355The tracking issue for this feature is: [#148767]
4356
4357[#148767]: https://github.com/rust-lang/rust/issues/148767
4358
4359------------------------
4360"##,
4361        default_severity: Severity::Allow,
4362        warn_since: None,
4363        deny_since: None,
4364    },
4365    Lint {
4366        label: "c_void_variant",
4367        description: r##"# `c_void_variant`
4368
4369This feature is internal to the Rust compiler and is not intended for general use.
4370
4371------------------------
4372"##,
4373        default_severity: Severity::Allow,
4374        warn_since: None,
4375        deny_since: None,
4376    },
4377    Lint {
4378        label: "can_vector",
4379        description: r##"# `can_vector`
4380
4381
4382
4383The tracking issue for this feature is: [#69941]
4384
4385[#69941]: https://github.com/rust-lang/rust/issues/69941
4386
4387------------------------
4388"##,
4389        default_severity: Severity::Allow,
4390        warn_since: None,
4391        deny_since: None,
4392    },
4393    Lint {
4394        label: "case_ignorable",
4395        description: r##"# `case_ignorable`
4396
4397
4398
4399The tracking issue for this feature is: [#154848]
4400
4401[#154848]: https://github.com/rust-lang/rust/issues/154848
4402
4403------------------------
4404"##,
4405        default_severity: Severity::Allow,
4406        warn_since: None,
4407        deny_since: None,
4408    },
4409    Lint {
4410        label: "cast_maybe_uninit",
4411        description: r##"# `cast_maybe_uninit`
4412
4413
4414
4415The tracking issue for this feature is: [#145036]
4416
4417[#145036]: https://github.com/rust-lang/rust/issues/145036
4418
4419------------------------
4420"##,
4421        default_severity: Severity::Allow,
4422        warn_since: None,
4423        deny_since: None,
4424    },
4425    Lint {
4426        label: "cell_get_cloned",
4427        description: r##"# `cell_get_cloned`
4428
4429
4430
4431The tracking issue for this feature is: [#145329]
4432
4433[#145329]: https://github.com/rust-lang/rust/issues/145329
4434
4435------------------------
4436"##,
4437        default_severity: Severity::Allow,
4438        warn_since: None,
4439        deny_since: None,
4440    },
4441    Lint {
4442        label: "cell_leak",
4443        description: r##"# `cell_leak`
4444
4445
4446
4447The tracking issue for this feature is: [#69099]
4448
4449[#69099]: https://github.com/rust-lang/rust/issues/69099
4450
4451------------------------
4452"##,
4453        default_severity: Severity::Allow,
4454        warn_since: None,
4455        deny_since: None,
4456    },
4457    Lint {
4458        label: "cfg_accessible",
4459        description: r##"# `cfg_accessible`
4460
4461
4462
4463The tracking issue for this feature is: [#64797]
4464
4465[#64797]: https://github.com/rust-lang/rust/issues/64797
4466
4467------------------------
4468"##,
4469        default_severity: Severity::Allow,
4470        warn_since: None,
4471        deny_since: None,
4472    },
4473    Lint {
4474        label: "cfg_contract_checks",
4475        description: r##"# `cfg_contract_checks`
4476
4477Allows the use of `#[cfg(contract_checks)` to check if contract checks are enabled.
4478
4479The tracking issue for this feature is: [#128044]
4480
4481[#128044]: https://github.com/rust-lang/rust/issues/128044
4482
4483------------------------
4484"##,
4485        default_severity: Severity::Allow,
4486        warn_since: None,
4487        deny_since: None,
4488    },
4489    Lint {
4490        label: "cfg_eval",
4491        description: r##"# `cfg_eval`
4492
4493
4494
4495The tracking issue for this feature is: [#82679]
4496
4497[#82679]: https://github.com/rust-lang/rust/issues/82679
4498
4499------------------------
4500"##,
4501        default_severity: Severity::Allow,
4502        warn_since: None,
4503        deny_since: None,
4504    },
4505    Lint {
4506        label: "cfg_overflow_checks",
4507        description: r##"# `cfg_overflow_checks`
4508
4509Allows the use of `#[cfg(overflow_checks)` to check if integer overflow behaviour.
4510
4511The tracking issue for this feature is: [#111466]
4512
4513[#111466]: https://github.com/rust-lang/rust/issues/111466
4514
4515------------------------
4516"##,
4517        default_severity: Severity::Allow,
4518        warn_since: None,
4519        deny_since: None,
4520    },
4521    Lint {
4522        label: "cfg_relocation_model",
4523        description: r##"# `cfg_relocation_model`
4524
4525Provides the relocation model information as cfg entry
4526
4527The tracking issue for this feature is: [#114929]
4528
4529[#114929]: https://github.com/rust-lang/rust/issues/114929
4530
4531------------------------
4532"##,
4533        default_severity: Severity::Allow,
4534        warn_since: None,
4535        deny_since: None,
4536    },
4537    Lint {
4538        label: "cfg_sanitize",
4539        description: r##"# `cfg_sanitize`
4540
4541The tracking issue for this feature is: [#39699]
4542
4543[#39699]: https://github.com/rust-lang/rust/issues/39699
4544
4545------------------------
4546
4547The `cfg_sanitize` feature makes it possible to execute different code
4548depending on whether a particular sanitizer is enabled or not.
4549
4550## Examples
4551
4552```rust
4553#![feature(cfg_sanitize)]
4554
4555#[cfg(sanitize = "thread")]
4556fn a() {
4557    // ...
4558}
4559
4560#[cfg(not(sanitize = "thread"))]
4561fn a() {
4562    // ...
4563}
4564
4565fn b() {
4566    if cfg!(sanitize = "leak") {
4567        // ...
4568    } else {
4569        // ...
4570    }
4571}
4572```
4573"##,
4574        default_severity: Severity::Allow,
4575        warn_since: None,
4576        deny_since: None,
4577    },
4578    Lint {
4579        label: "cfg_sanitizer_cfi",
4580        description: r##"# `cfg_sanitizer_cfi`
4581
4582Allows `cfg(sanitizer_cfi_generalize_pointers)` and `cfg(sanitizer_cfi_normalize_integers)`.
4583
4584The tracking issue for this feature is: [#89653]
4585
4586[#89653]: https://github.com/rust-lang/rust/issues/89653
4587
4588------------------------
4589"##,
4590        default_severity: Severity::Allow,
4591        warn_since: None,
4592        deny_since: None,
4593    },
4594    Lint {
4595        label: "cfg_target_compact",
4596        description: r##"# `cfg_target_compact`
4597
4598Allows `cfg(target(abi = "..."))`.
4599
4600The tracking issue for this feature is: [#96901]
4601
4602[#96901]: https://github.com/rust-lang/rust/issues/96901
4603
4604------------------------
4605"##,
4606        default_severity: Severity::Allow,
4607        warn_since: None,
4608        deny_since: None,
4609    },
4610    Lint {
4611        label: "cfg_target_has_atomic",
4612        description: r##"# `cfg_target_has_atomic`
4613
4614Allows `cfg(target_has_atomic_load_store = "...")`.
4615
4616The tracking issue for this feature is: [#94039]
4617
4618[#94039]: https://github.com/rust-lang/rust/issues/94039
4619
4620------------------------
4621"##,
4622        default_severity: Severity::Allow,
4623        warn_since: None,
4624        deny_since: None,
4625    },
4626    Lint {
4627        label: "cfg_target_has_reliable_f16_f128",
4628        description: r##"# `cfg_target_has_reliable_f16_f128`
4629
4630Allows checking whether or not the backend correctly supports unstable float types.
4631
4632This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
4633
4634------------------------
4635"##,
4636        default_severity: Severity::Allow,
4637        warn_since: None,
4638        deny_since: None,
4639    },
4640    Lint {
4641        label: "cfg_target_object_format",
4642        description: r##"# `cfg_target_object_format`
4643
4644The tracking issue for this feature is: [#152586]
4645
4646[#152586]: https://github.com/rust-lang/rust/issues/152586
4647
4648------------------------
4649
4650The `cfg_target_object_format` feature makes it possible to execute different code
4651depending on the current target's object file format.
4652
4653## Examples
4654
4655```rust
4656#![feature(cfg_target_object_format)]
4657
4658#[cfg(target_object_format = "elf")]
4659fn a() {
4660    // ...
4661}
4662
4663#[cfg(target_object_format = "mach-o")]
4664fn a() {
4665    // ...
4666}
4667
4668fn b() {
4669    if cfg!(target_object_format = "wasm") {
4670        // ...
4671    } else {
4672        // ...
4673    }
4674}
4675```
4676"##,
4677        default_severity: Severity::Allow,
4678        warn_since: None,
4679        deny_since: None,
4680    },
4681    Lint {
4682        label: "cfg_target_thread_local",
4683        description: r##"# `cfg_target_thread_local`
4684
4685Allows `cfg(target_thread_local)`.
4686
4687The tracking issue for this feature is: [#29594]
4688
4689[#29594]: https://github.com/rust-lang/rust/issues/29594
4690
4691------------------------
4692"##,
4693        default_severity: Severity::Allow,
4694        warn_since: None,
4695        deny_since: None,
4696    },
4697    Lint {
4698        label: "cfg_ub_checks",
4699        description: r##"# `cfg_ub_checks`
4700
4701Allows the use of `#[cfg(ub_checks)` to check if UB checks are enabled.
4702
4703The tracking issue for this feature is: [#123499]
4704
4705[#123499]: https://github.com/rust-lang/rust/issues/123499
4706
4707------------------------
4708"##,
4709        default_severity: Severity::Allow,
4710        warn_since: None,
4711        deny_since: None,
4712    },
4713    Lint {
4714        label: "cfg_version",
4715        description: r##"# `cfg_version`
4716
4717The tracking issue for this feature is: [#64796]
4718
4719[#64796]: https://github.com/rust-lang/rust/issues/64796
4720
4721------------------------
4722
4723The `cfg_version` feature makes it possible to execute different code
4724depending on the compiler version. It will return true if the compiler
4725version is greater than or equal to the specified version.
4726
4727## Examples
4728
4729```rust
4730#![feature(cfg_version)]
4731
4732#[cfg(version("1.42"))] // 1.42 and above
4733fn a() {
4734    // ...
4735}
4736
4737#[cfg(not(version("1.42")))] // 1.41 and below
4738fn a() {
4739    // ...
4740}
4741
4742fn b() {
4743    if cfg!(version("1.42")) {
4744        // ...
4745    } else {
4746        // ...
4747    }
4748}
4749```
4750"##,
4751        default_severity: Severity::Allow,
4752        warn_since: None,
4753        deny_since: None,
4754    },
4755    Lint {
4756        label: "cfi_encoding",
4757        description: r##"# `cfi_encoding`
4758
4759The tracking issue for this feature is: [#89653]
4760
4761[#89653]: https://github.com/rust-lang/rust/issues/89653
4762
4763------------------------
4764
4765The `cfi_encoding` feature allows the user to define a CFI encoding for a type.
4766It allows the user to use a different names for types that otherwise would be
4767required to have the same name as used in externally defined C functions.
4768
4769## Examples
4770
4771```rust
4772#![feature(cfi_encoding, extern_types)]
4773
4774#[cfi_encoding = "3Foo"]
4775pub struct Type1(i32);
4776
4777extern {
4778    #[cfi_encoding = "3Bar"]
4779    type Type2;
4780}
4781```
4782"##,
4783        default_severity: Severity::Allow,
4784        warn_since: None,
4785        deny_since: None,
4786    },
4787    Lint {
4788        label: "char_internals",
4789        description: r##"# `char_internals`
4790
4791
4792
4793This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
4794
4795------------------------
4796"##,
4797        default_severity: Severity::Allow,
4798        warn_since: None,
4799        deny_since: None,
4800    },
4801    Lint {
4802        label: "clamp_magnitude",
4803        description: r##"# `clamp_magnitude`
4804
4805
4806
4807The tracking issue for this feature is: [#148519]
4808
4809[#148519]: https://github.com/rust-lang/rust/issues/148519
4810
4811------------------------
4812"##,
4813        default_severity: Severity::Allow,
4814        warn_since: None,
4815        deny_since: None,
4816    },
4817    Lint {
4818        label: "clflushopt_target_feature",
4819        description: r##"# `clflushopt_target_feature`
4820
4821The `clflushopt` target feature on x86.
4822
4823The tracking issue for this feature is: [#157096]
4824
4825[#157096]: https://github.com/rust-lang/rust/issues/157096
4826
4827------------------------
4828"##,
4829        default_severity: Severity::Allow,
4830        warn_since: None,
4831        deny_since: None,
4832    },
4833    Lint {
4834        label: "clone_from_ref",
4835        description: r##"# `clone_from_ref`
4836
4837
4838
4839The tracking issue for this feature is: [#149075]
4840
4841[#149075]: https://github.com/rust-lang/rust/issues/149075
4842
4843------------------------
4844"##,
4845        default_severity: Severity::Allow,
4846        warn_since: None,
4847        deny_since: None,
4848    },
4849    Lint {
4850        label: "clone_to_uninit",
4851        description: r##"# `clone_to_uninit`
4852
4853
4854
4855The tracking issue for this feature is: [#126799]
4856
4857[#126799]: https://github.com/rust-lang/rust/issues/126799
4858
4859------------------------
4860"##,
4861        default_severity: Severity::Allow,
4862        warn_since: None,
4863        deny_since: None,
4864    },
4865    Lint {
4866        label: "closure_lifetime_binder",
4867        description: r##"# `closure_lifetime_binder`
4868
4869Allows `for<...>` on closures and coroutines.
4870
4871The tracking issue for this feature is: [#97362]
4872
4873[#97362]: https://github.com/rust-lang/rust/issues/97362
4874
4875------------------------
4876"##,
4877        default_severity: Severity::Allow,
4878        warn_since: None,
4879        deny_since: None,
4880    },
4881    Lint {
4882        label: "closure_track_caller",
4883        description: r##"# `closure_track_caller`
4884
4885The tracking issue for this feature is: [#87417]
4886
4887[#87417]: https://github.com/rust-lang/rust/issues/87417
4888
4889------------------------
4890
4891Allows using the `#[track_caller]` attribute on closures and coroutines.
4892Calls made to the closure or coroutine will have caller information
4893available through `std::panic::Location::caller()`, just like using
4894`#[track_caller]` on a function.
4895"##,
4896        default_severity: Severity::Allow,
4897        warn_since: None,
4898        deny_since: None,
4899    },
4900    Lint {
4901        label: "cmp_minmax",
4902        description: r##"# `cmp_minmax`
4903
4904
4905
4906The tracking issue for this feature is: [#115939]
4907
4908[#115939]: https://github.com/rust-lang/rust/issues/115939
4909
4910------------------------
4911"##,
4912        default_severity: Severity::Allow,
4913        warn_since: None,
4914        deny_since: None,
4915    },
4916    Lint {
4917        label: "cmse_nonsecure_entry",
4918        description: r##"# `cmse_nonsecure_entry`
4919
4920The tracking issue for this feature is: [#75835]
4921
4922[#75835]: https://github.com/rust-lang/rust/issues/75835
4923
4924------------------------
4925
4926The [TrustZone-M
4927feature](https://developer.arm.com/documentation/100690/latest/) is available
4928for targets with the Armv8-M architecture profile (`thumbv8m` in their target
4929name).
4930LLVM, the Rust compiler and the linker are providing
4931[support](https://developer.arm.com/documentation/ecm0359818/latest/) for the
4932TrustZone-M feature.
4933
4934One of the things provided with this unstable feature is the "cmse-nonsecure-entry" ABI.
4935This ABI marks a Secure function as an entry function (see
4936[section 5.4](https://developer.arm.com/documentation/ecm0359818/latest/) for details).
4937With this ABI, the compiler will do the following:
4938* add a special symbol on the function which is the `__acle_se_` prefix and the
4939  standard function name
4940* constrain the number of parameters to avoid using the Non-Secure stack
4941* before returning from the function, clear registers that might contain Secure
4942  information
4943* use the `BXNS` instruction to return
4944
4945Because the stack can not be used to pass parameters, there will be compilation
4946errors if:
4947* the total size of all parameters is too big (for example, more than four 32-bit integers)
4948
4949The special symbol `__acle_se_` will be used by the linker to generate a secure
4950gateway veneer.
4951
4952<!-- NOTE(ignore) this example is specific to thumbv8m targets -->
4953
4954``` rust,ignore
4955#![no_std]
4956#![feature(cmse_nonsecure_entry)]
4957
4958#[no_mangle]
4959pub extern "cmse-nonsecure-entry" fn entry_function(input: u32) -> u32 {
4960    input + 6
4961}
4962```
4963
4964``` text
4965$ rustc --emit obj --crate-type lib --target thumbv8m.main-none-eabi function.rs
4966$ arm-none-eabi-objdump -D function.o
4967
496800000000 <entry_function>:
4969   0:   b580            push    {r7, lr}
4970   2:   466f            mov     r7, sp
4971   4:   b082            sub     sp, #8
4972   6:   9001            str     r0, [sp, #4]
4973   8:   1d81            adds    r1, r0, #6
4974   a:   460a            mov     r2, r1
4975   c:   4281            cmp     r1, r0
4976   e:   9200            str     r2, [sp, #0]
4977  10:   d30b            bcc.n   2a <entry_function+0x2a>
4978  12:   e7ff            b.n     14 <entry_function+0x14>
4979  14:   9800            ldr     r0, [sp, #0]
4980  16:   b002            add     sp, #8
4981  18:   e8bd 4080       ldmia.w sp!, {r7, lr}
4982  1c:   4671            mov     r1, lr
4983  1e:   4672            mov     r2, lr
4984  20:   4673            mov     r3, lr
4985  22:   46f4            mov     ip, lr
4986  24:   f38e 8800       msr     CPSR_f, lr
4987  28:   4774            bxns    lr
4988  2a:   f240 0000       movw    r0, #0
4989  2e:   f2c0 0000       movt    r0, #0
4990  32:   f240 0200       movw    r2, #0
4991  36:   f2c0 0200       movt    r2, #0
4992  3a:   211c            movs    r1, #28
4993  3c:   f7ff fffe       bl      0 <_ZN4core9panicking5panic17h5c028258ca2fb3f5E>
4994  40:   defe            udf     #254    ; 0xfe
4995```
4996"##,
4997        default_severity: Severity::Allow,
4998        warn_since: None,
4999        deny_since: None,
5000    },
5001    Lint {
5002        label: "coerce_pointee_validated",
5003        description: r##"# `coerce_pointee_validated`
5004
5005
5006
5007This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
5008
5009------------------------
5010"##,
5011        default_severity: Severity::Allow,
5012        warn_since: None,
5013        deny_since: None,
5014    },
5015    Lint {
5016        label: "coerce_unsized",
5017        description: r##"# `coerce_unsized`
5018
5019
5020
5021The tracking issue for this feature is: [#18598]
5022
5023[#18598]: https://github.com/rust-lang/rust/issues/18598
5024
5025------------------------
5026"##,
5027        default_severity: Severity::Allow,
5028        warn_since: None,
5029        deny_since: None,
5030    },
5031    Lint {
5032        label: "command_resolved_envs",
5033        description: r##"# `command_resolved_envs`
5034
5035
5036
5037The tracking issue for this feature is: [#149070]
5038
5039[#149070]: https://github.com/rust-lang/rust/issues/149070
5040
5041------------------------
5042"##,
5043        default_severity: Severity::Allow,
5044        warn_since: None,
5045        deny_since: None,
5046    },
5047    Lint {
5048        label: "compiler_builtins",
5049        description: r##"# `compiler_builtins`
5050
5051This feature is internal to the Rust compiler and is not intended for general use.
5052
5053------------------------
5054"##,
5055        default_severity: Severity::Allow,
5056        warn_since: None,
5057        deny_since: None,
5058    },
5059    Lint {
5060        label: "concat_bytes",
5061        description: r##"# `concat_bytes`
5062
5063
5064
5065The tracking issue for this feature is: [#87555]
5066
5067[#87555]: https://github.com/rust-lang/rust/issues/87555
5068
5069------------------------
5070"##,
5071        default_severity: Severity::Allow,
5072        warn_since: None,
5073        deny_since: None,
5074    },
5075    Lint {
5076        label: "const_alloc_error",
5077        description: r##"# `const_alloc_error`
5078
5079
5080
5081The tracking issue for this feature is: [#92523]
5082
5083[#92523]: https://github.com/rust-lang/rust/issues/92523
5084
5085------------------------
5086"##,
5087        default_severity: Severity::Allow,
5088        warn_since: None,
5089        deny_since: None,
5090    },
5091    Lint {
5092        label: "const_array",
5093        description: r##"# `const_array`
5094
5095
5096
5097The tracking issue for this feature is: [#147606]
5098
5099[#147606]: https://github.com/rust-lang/rust/issues/147606
5100
5101------------------------
5102"##,
5103        default_severity: Severity::Allow,
5104        warn_since: None,
5105        deny_since: None,
5106    },
5107    Lint {
5108        label: "const_async_blocks",
5109        description: r##"# `const_async_blocks`
5110
5111Allows `async {}` expressions in const contexts.
5112
5113The tracking issue for this feature is: [#85368]
5114
5115[#85368]: https://github.com/rust-lang/rust/issues/85368
5116
5117------------------------
5118"##,
5119        default_severity: Severity::Allow,
5120        warn_since: None,
5121        deny_since: None,
5122    },
5123    Lint {
5124        label: "const_block_items",
5125        description: r##"# `const_block_items`
5126
5127Allows `const { ... }` as a shorthand for `const _: () = const { ... };` for module items.
5128
5129The tracking issue for this feature is: [#149226]
5130
5131[#149226]: https://github.com/rust-lang/rust/issues/149226
5132
5133------------------------
5134"##,
5135        default_severity: Severity::Allow,
5136        warn_since: None,
5137        deny_since: None,
5138    },
5139    Lint {
5140        label: "const_bool",
5141        description: r##"# `const_bool`
5142
5143
5144
5145The tracking issue for this feature is: [#151531]
5146
5147[#151531]: https://github.com/rust-lang/rust/issues/151531
5148
5149------------------------
5150"##,
5151        default_severity: Severity::Allow,
5152        warn_since: None,
5153        deny_since: None,
5154    },
5155    Lint {
5156        label: "const_btree_len",
5157        description: r##"# `const_btree_len`
5158
5159
5160
5161This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
5162
5163------------------------
5164"##,
5165        default_severity: Severity::Allow,
5166        warn_since: None,
5167        deny_since: None,
5168    },
5169    Lint {
5170        label: "const_c_variadic",
5171        description: r##"# `const_c_variadic`
5172
5173Allows defining and calling c-variadic functions in const contexts.
5174
5175The tracking issue for this feature is: [#151787]
5176
5177[#151787]: https://github.com/rust-lang/rust/issues/151787
5178
5179------------------------
5180"##,
5181        default_severity: Severity::Allow,
5182        warn_since: None,
5183        deny_since: None,
5184    },
5185    Lint {
5186        label: "const_carrying_mul_add",
5187        description: r##"# `const_carrying_mul_add`
5188
5189
5190
5191The tracking issue for this feature is: [#85532]
5192
5193[#85532]: https://github.com/rust-lang/rust/issues/85532
5194
5195------------------------
5196"##,
5197        default_severity: Severity::Allow,
5198        warn_since: None,
5199        deny_since: None,
5200    },
5201    Lint {
5202        label: "const_cell_traits",
5203        description: r##"# `const_cell_traits`
5204
5205
5206
5207The tracking issue for this feature is: [#147787]
5208
5209[#147787]: https://github.com/rust-lang/rust/issues/147787
5210
5211------------------------
5212"##,
5213        default_severity: Severity::Allow,
5214        warn_since: None,
5215        deny_since: None,
5216    },
5217    Lint {
5218        label: "const_clone",
5219        description: r##"# `const_clone`
5220
5221
5222
5223The tracking issue for this feature is: [#142757]
5224
5225[#142757]: https://github.com/rust-lang/rust/issues/142757
5226
5227------------------------
5228"##,
5229        default_severity: Severity::Allow,
5230        warn_since: None,
5231        deny_since: None,
5232    },
5233    Lint {
5234        label: "const_closures",
5235        description: r##"# `const_closures`
5236
5237Allows `const || {}` closures in const contexts.
5238
5239The tracking issue for this feature is: [#106003]
5240
5241[#106003]: https://github.com/rust-lang/rust/issues/106003
5242
5243------------------------
5244"##,
5245        default_severity: Severity::Allow,
5246        warn_since: None,
5247        deny_since: None,
5248    },
5249    Lint {
5250        label: "const_cmp",
5251        description: r##"# `const_cmp`
5252
5253
5254
5255The tracking issue for this feature is: [#143800]
5256
5257[#143800]: https://github.com/rust-lang/rust/issues/143800
5258
5259------------------------
5260"##,
5261        default_severity: Severity::Allow,
5262        warn_since: None,
5263        deny_since: None,
5264    },
5265    Lint {
5266        label: "const_control_flow",
5267        description: r##"# `const_control_flow`
5268
5269
5270
5271The tracking issue for this feature is: [#148739]
5272
5273[#148739]: https://github.com/rust-lang/rust/issues/148739
5274
5275------------------------
5276"##,
5277        default_severity: Severity::Allow,
5278        warn_since: None,
5279        deny_since: None,
5280    },
5281    Lint {
5282        label: "const_convert",
5283        description: r##"# `const_convert`
5284
5285
5286
5287The tracking issue for this feature is: [#143773]
5288
5289[#143773]: https://github.com/rust-lang/rust/issues/143773
5290
5291------------------------
5292"##,
5293        default_severity: Severity::Allow,
5294        warn_since: None,
5295        deny_since: None,
5296    },
5297    Lint {
5298        label: "const_default",
5299        description: r##"# `const_default`
5300
5301
5302
5303The tracking issue for this feature is: [#143894]
5304
5305[#143894]: https://github.com/rust-lang/rust/issues/143894
5306
5307------------------------
5308"##,
5309        default_severity: Severity::Allow,
5310        warn_since: None,
5311        deny_since: None,
5312    },
5313    Lint {
5314        label: "const_destruct",
5315        description: r##"# `const_destruct`
5316
5317Allows using `[const] Destruct` bounds and calling drop impls in const contexts.
5318
5319The tracking issue for this feature is: [#133214]
5320
5321[#133214]: https://github.com/rust-lang/rust/issues/133214
5322
5323------------------------
5324"##,
5325        default_severity: Severity::Allow,
5326        warn_since: None,
5327        deny_since: None,
5328    },
5329    Lint {
5330        label: "const_drop_guard",
5331        description: r##"# `const_drop_guard`
5332
5333
5334
5335This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
5336
5337------------------------
5338"##,
5339        default_severity: Severity::Allow,
5340        warn_since: None,
5341        deny_since: None,
5342    },
5343    Lint {
5344        label: "const_drop_in_place",
5345        description: r##"# `const_drop_in_place`
5346
5347
5348
5349The tracking issue for this feature is: [#109342]
5350
5351[#109342]: https://github.com/rust-lang/rust/issues/109342
5352
5353------------------------
5354"##,
5355        default_severity: Severity::Allow,
5356        warn_since: None,
5357        deny_since: None,
5358    },
5359    Lint {
5360        label: "const_eval_select",
5361        description: r##"# `const_eval_select`
5362
5363
5364
5365The tracking issue for this feature is: [#124625]
5366
5367[#124625]: https://github.com/rust-lang/rust/issues/124625
5368
5369------------------------
5370"##,
5371        default_severity: Severity::Allow,
5372        warn_since: None,
5373        deny_since: None,
5374    },
5375    Lint {
5376        label: "const_for",
5377        description: r##"# `const_for`
5378
5379Allows `for _ in _` loops in const contexts.
5380
5381The tracking issue for this feature is: [#87575]
5382
5383[#87575]: https://github.com/rust-lang/rust/issues/87575
5384
5385------------------------
5386"##,
5387        default_severity: Severity::Allow,
5388        warn_since: None,
5389        deny_since: None,
5390    },
5391    Lint {
5392        label: "const_format_args",
5393        description: r##"# `const_format_args`
5394
5395
5396
5397This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
5398
5399------------------------
5400"##,
5401        default_severity: Severity::Allow,
5402        warn_since: None,
5403        deny_since: None,
5404    },
5405    Lint {
5406        label: "const_heap",
5407        description: r##"# `const_heap`
5408
5409
5410
5411The tracking issue for this feature is: [#79597]
5412
5413[#79597]: https://github.com/rust-lang/rust/issues/79597
5414
5415------------------------
5416"##,
5417        default_severity: Severity::Allow,
5418        warn_since: None,
5419        deny_since: None,
5420    },
5421    Lint {
5422        label: "const_index",
5423        description: r##"# `const_index`
5424
5425
5426
5427The tracking issue for this feature is: [#143775]
5428
5429[#143775]: https://github.com/rust-lang/rust/issues/143775
5430
5431------------------------
5432"##,
5433        default_severity: Severity::Allow,
5434        warn_since: None,
5435        deny_since: None,
5436    },
5437    Lint {
5438        label: "const_iter",
5439        description: r##"# `const_iter`
5440
5441
5442
5443The tracking issue for this feature is: [#92476]
5444
5445[#92476]: https://github.com/rust-lang/rust/issues/92476
5446
5447------------------------
5448"##,
5449        default_severity: Severity::Allow,
5450        warn_since: None,
5451        deny_since: None,
5452    },
5453    Lint {
5454        label: "const_manually_drop_take",
5455        description: r##"# `const_manually_drop_take`
5456
5457
5458
5459The tracking issue for this feature is: [#148773]
5460
5461[#148773]: https://github.com/rust-lang/rust/issues/148773
5462
5463------------------------
5464"##,
5465        default_severity: Severity::Allow,
5466        warn_since: None,
5467        deny_since: None,
5468    },
5469    Lint {
5470        label: "const_never_short_circuit",
5471        description: r##"# `const_never_short_circuit`
5472
5473
5474
5475This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
5476
5477------------------------
5478"##,
5479        default_severity: Severity::Allow,
5480        warn_since: None,
5481        deny_since: None,
5482    },
5483    Lint {
5484        label: "const_nonnull_with_exposed_provenance",
5485        description: r##"# `const_nonnull_with_exposed_provenance`
5486
5487
5488
5489The tracking issue for this feature is: [#154215]
5490
5491[#154215]: https://github.com/rust-lang/rust/issues/154215
5492
5493------------------------
5494"##,
5495        default_severity: Severity::Allow,
5496        warn_since: None,
5497        deny_since: None,
5498    },
5499    Lint {
5500        label: "const_ops",
5501        description: r##"# `const_ops`
5502
5503
5504
5505The tracking issue for this feature is: [#143802]
5506
5507[#143802]: https://github.com/rust-lang/rust/issues/143802
5508
5509------------------------
5510"##,
5511        default_severity: Severity::Allow,
5512        warn_since: None,
5513        deny_since: None,
5514    },
5515    Lint {
5516        label: "const_option_ops",
5517        description: r##"# `const_option_ops`
5518
5519
5520
5521The tracking issue for this feature is: [#143956]
5522
5523[#143956]: https://github.com/rust-lang/rust/issues/143956
5524
5525------------------------
5526"##,
5527        default_severity: Severity::Allow,
5528        warn_since: None,
5529        deny_since: None,
5530    },
5531    Lint {
5532        label: "const_param_ty_trait",
5533        description: r##"# `const_param_ty_trait`
5534
5535
5536
5537The tracking issue for this feature is: [#95174]
5538
5539[#95174]: https://github.com/rust-lang/rust/issues/95174
5540
5541------------------------
5542"##,
5543        default_severity: Severity::Allow,
5544        warn_since: None,
5545        deny_since: None,
5546    },
5547    Lint {
5548        label: "const_param_ty_unchecked",
5549        description: r##"# `const_param_ty_unchecked`
5550
5551Allows skipping `ConstParamTy_` trait implementation checks
5552
5553This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
5554
5555------------------------
5556"##,
5557        default_severity: Severity::Allow,
5558        warn_since: None,
5559        deny_since: None,
5560    },
5561    Lint {
5562        label: "const_path_separators",
5563        description: r##"# `const_path_separators`
5564
5565
5566
5567The tracking issue for this feature is: [#153106]
5568
5569[#153106]: https://github.com/rust-lang/rust/issues/153106
5570
5571------------------------
5572"##,
5573        default_severity: Severity::Allow,
5574        warn_since: None,
5575        deny_since: None,
5576    },
5577    Lint {
5578        label: "const_precise_live_drops",
5579        description: r##"# `const_precise_live_drops`
5580
5581Be more precise when looking for live drops in a const context.
5582
5583The tracking issue for this feature is: [#73255]
5584
5585[#73255]: https://github.com/rust-lang/rust/issues/73255
5586
5587------------------------
5588"##,
5589        default_severity: Severity::Allow,
5590        warn_since: None,
5591        deny_since: None,
5592    },
5593    Lint {
5594        label: "const_range",
5595        description: r##"# `const_range`
5596
5597
5598
5599This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
5600
5601------------------------
5602"##,
5603        default_severity: Severity::Allow,
5604        warn_since: None,
5605        deny_since: None,
5606    },
5607    Lint {
5608        label: "const_range_bounds",
5609        description: r##"# `const_range_bounds`
5610
5611
5612
5613The tracking issue for this feature is: [#108082]
5614
5615[#108082]: https://github.com/rust-lang/rust/issues/108082
5616
5617------------------------
5618"##,
5619        default_severity: Severity::Allow,
5620        warn_since: None,
5621        deny_since: None,
5622    },
5623    Lint {
5624        label: "const_raw_ptr_comparison",
5625        description: r##"# `const_raw_ptr_comparison`
5626
5627
5628
5629The tracking issue for this feature is: [#53020]
5630
5631[#53020]: https://github.com/rust-lang/rust/issues/53020
5632
5633------------------------
5634"##,
5635        default_severity: Severity::Allow,
5636        warn_since: None,
5637        deny_since: None,
5638    },
5639    Lint {
5640        label: "const_ref_cell",
5641        description: r##"# `const_ref_cell`
5642
5643
5644
5645The tracking issue for this feature is: [#137844]
5646
5647[#137844]: https://github.com/rust-lang/rust/issues/137844
5648
5649------------------------
5650"##,
5651        default_severity: Severity::Allow,
5652        warn_since: None,
5653        deny_since: None,
5654    },
5655    Lint {
5656        label: "const_result_trait_fn",
5657        description: r##"# `const_result_trait_fn`
5658
5659
5660
5661The tracking issue for this feature is: [#144211]
5662
5663[#144211]: https://github.com/rust-lang/rust/issues/144211
5664
5665------------------------
5666"##,
5667        default_severity: Severity::Allow,
5668        warn_since: None,
5669        deny_since: None,
5670    },
5671    Lint {
5672        label: "const_result_unwrap_unchecked",
5673        description: r##"# `const_result_unwrap_unchecked`
5674
5675
5676
5677The tracking issue for this feature is: [#148714]
5678
5679[#148714]: https://github.com/rust-lang/rust/issues/148714
5680
5681------------------------
5682"##,
5683        default_severity: Severity::Allow,
5684        warn_since: None,
5685        deny_since: None,
5686    },
5687    Lint {
5688        label: "const_select_unpredictable",
5689        description: r##"# `const_select_unpredictable`
5690
5691
5692
5693The tracking issue for this feature is: [#145938]
5694
5695[#145938]: https://github.com/rust-lang/rust/issues/145938
5696
5697------------------------
5698"##,
5699        default_severity: Severity::Allow,
5700        warn_since: None,
5701        deny_since: None,
5702    },
5703    Lint {
5704        label: "const_slice_from_mut_ptr_range",
5705        description: r##"# `const_slice_from_mut_ptr_range`
5706
5707
5708
5709The tracking issue for this feature is: [#89792]
5710
5711[#89792]: https://github.com/rust-lang/rust/issues/89792
5712
5713------------------------
5714"##,
5715        default_severity: Severity::Allow,
5716        warn_since: None,
5717        deny_since: None,
5718    },
5719    Lint {
5720        label: "const_slice_from_ptr_range",
5721        description: r##"# `const_slice_from_ptr_range`
5722
5723
5724
5725The tracking issue for this feature is: [#89792]
5726
5727[#89792]: https://github.com/rust-lang/rust/issues/89792
5728
5729------------------------
5730"##,
5731        default_severity: Severity::Allow,
5732        warn_since: None,
5733        deny_since: None,
5734    },
5735    Lint {
5736        label: "const_slice_make_iter",
5737        description: r##"# `const_slice_make_iter`
5738
5739
5740
5741The tracking issue for this feature is: [#137737]
5742
5743[#137737]: https://github.com/rust-lang/rust/issues/137737
5744
5745------------------------
5746"##,
5747        default_severity: Severity::Allow,
5748        warn_since: None,
5749        deny_since: None,
5750    },
5751    Lint {
5752        label: "const_split_off_first_last",
5753        description: r##"# `const_split_off_first_last`
5754
5755
5756
5757The tracking issue for this feature is: [#138539]
5758
5759[#138539]: https://github.com/rust-lang/rust/issues/138539
5760
5761------------------------
5762"##,
5763        default_severity: Severity::Allow,
5764        warn_since: None,
5765        deny_since: None,
5766    },
5767    Lint {
5768        label: "const_swap_with_slice",
5769        description: r##"# `const_swap_with_slice`
5770
5771
5772
5773The tracking issue for this feature is: [#142204]
5774
5775[#142204]: https://github.com/rust-lang/rust/issues/142204
5776
5777------------------------
5778"##,
5779        default_severity: Severity::Allow,
5780        warn_since: None,
5781        deny_since: None,
5782    },
5783    Lint {
5784        label: "const_trait_impl",
5785        description: r##"# `const_trait_impl`
5786
5787Allows `impl const Trait for T` syntax.
5788
5789The tracking issue for this feature is: [#143874]
5790
5791[#143874]: https://github.com/rust-lang/rust/issues/143874
5792
5793------------------------
5794"##,
5795        default_severity: Severity::Allow,
5796        warn_since: None,
5797        deny_since: None,
5798    },
5799    Lint {
5800        label: "const_try",
5801        description: r##"# `const_try`
5802
5803Allows the `?` operator in const contexts.
5804
5805The tracking issue for this feature is: [#74935]
5806
5807[#74935]: https://github.com/rust-lang/rust/issues/74935
5808
5809------------------------
5810"##,
5811        default_severity: Severity::Allow,
5812        warn_since: None,
5813        deny_since: None,
5814    },
5815    Lint {
5816        label: "const_try_residual",
5817        description: r##"# `const_try_residual`
5818
5819
5820
5821The tracking issue for this feature is: [#91285]
5822
5823[#91285]: https://github.com/rust-lang/rust/issues/91285
5824
5825------------------------
5826"##,
5827        default_severity: Severity::Allow,
5828        warn_since: None,
5829        deny_since: None,
5830    },
5831    Lint {
5832        label: "const_type_name",
5833        description: r##"# `const_type_name`
5834
5835
5836
5837The tracking issue for this feature is: [#63084]
5838
5839[#63084]: https://github.com/rust-lang/rust/issues/63084
5840
5841------------------------
5842"##,
5843        default_severity: Severity::Allow,
5844        warn_since: None,
5845        deny_since: None,
5846    },
5847    Lint {
5848        label: "const_unsigned_bigint_helpers",
5849        description: r##"# `const_unsigned_bigint_helpers`
5850
5851
5852
5853The tracking issue for this feature is: [#152015]
5854
5855[#152015]: https://github.com/rust-lang/rust/issues/152015
5856
5857------------------------
5858"##,
5859        default_severity: Severity::Allow,
5860        warn_since: None,
5861        deny_since: None,
5862    },
5863    Lint {
5864        label: "container_error_extra",
5865        description: r##"# `container_error_extra`
5866
5867
5868
5869This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
5870
5871------------------------
5872"##,
5873        default_severity: Severity::Allow,
5874        warn_since: None,
5875        deny_since: None,
5876    },
5877    Lint {
5878        label: "context_ext",
5879        description: r##"# `context_ext`
5880
5881
5882
5883The tracking issue for this feature is: [#123392]
5884
5885[#123392]: https://github.com/rust-lang/rust/issues/123392
5886
5887------------------------
5888"##,
5889        default_severity: Severity::Allow,
5890        warn_since: None,
5891        deny_since: None,
5892    },
5893    Lint {
5894        label: "contracts",
5895        description: r##"# `contracts`
5896
5897Allows use of contracts attributes.
5898
5899The tracking issue for this feature is: [#128044]
5900
5901[#128044]: https://github.com/rust-lang/rust/issues/128044
5902
5903------------------------
5904"##,
5905        default_severity: Severity::Allow,
5906        warn_since: None,
5907        deny_since: None,
5908    },
5909    Lint {
5910        label: "contracts_internals",
5911        description: r##"# `contracts_internals`
5912
5913Allows access to internal machinery used to implement contracts.
5914
5915The tracking issue for this feature is: [#128044]
5916
5917[#128044]: https://github.com/rust-lang/rust/issues/128044
5918
5919------------------------
5920"##,
5921        default_severity: Severity::Allow,
5922        warn_since: None,
5923        deny_since: None,
5924    },
5925    Lint {
5926        label: "control_flow_into_value",
5927        description: r##"# `control_flow_into_value`
5928
5929
5930
5931The tracking issue for this feature is: [#137461]
5932
5933[#137461]: https://github.com/rust-lang/rust/issues/137461
5934
5935------------------------
5936"##,
5937        default_severity: Severity::Allow,
5938        warn_since: None,
5939        deny_since: None,
5940    },
5941    Lint {
5942        label: "convert_float_to_int",
5943        description: r##"# `convert_float_to_int`
5944
5945
5946
5947The tracking issue for this feature is: [#67057]
5948
5949[#67057]: https://github.com/rust-lang/rust/issues/67057
5950
5951------------------------
5952"##,
5953        default_severity: Severity::Allow,
5954        warn_since: None,
5955        deny_since: None,
5956    },
5957    Lint {
5958        label: "copied_into_inner",
5959        description: r##"# `copied_into_inner`
5960
5961
5962
5963This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
5964
5965------------------------
5966"##,
5967        default_severity: Severity::Allow,
5968        warn_since: None,
5969        deny_since: None,
5970    },
5971    Lint {
5972        label: "core_float_math",
5973        description: r##"# `core_float_math`
5974
5975
5976
5977The tracking issue for this feature is: [#137578]
5978
5979[#137578]: https://github.com/rust-lang/rust/issues/137578
5980
5981------------------------
5982"##,
5983        default_severity: Severity::Allow,
5984        warn_since: None,
5985        deny_since: None,
5986    },
5987    Lint {
5988        label: "core_intrinsics",
5989        description: r##"# `core_intrinsics`
5990
5991This feature is internal to the Rust compiler and is not intended for general use.
5992
5993------------------------
5994"##,
5995        default_severity: Severity::Allow,
5996        warn_since: None,
5997        deny_since: None,
5998    },
5999    Lint {
6000        label: "core_intrinsics_fallbacks",
6001        description: r##"# `core_intrinsics_fallbacks`
6002
6003
6004
6005This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
6006
6007------------------------
6008"##,
6009        default_severity: Severity::Allow,
6010        warn_since: None,
6011        deny_since: None,
6012    },
6013    Lint {
6014        label: "core_io",
6015        description: r##"# `core_io`
6016
6017
6018
6019The tracking issue for this feature is: [#154046]
6020
6021[#154046]: https://github.com/rust-lang/rust/issues/154046
6022
6023------------------------
6024"##,
6025        default_severity: Severity::Allow,
6026        warn_since: None,
6027        deny_since: None,
6028    },
6029    Lint {
6030        label: "core_io_borrowed_buf",
6031        description: r##"# `core_io_borrowed_buf`
6032
6033
6034
6035The tracking issue for this feature is: [#117693]
6036
6037[#117693]: https://github.com/rust-lang/rust/issues/117693
6038
6039------------------------
6040"##,
6041        default_severity: Severity::Allow,
6042        warn_since: None,
6043        deny_since: None,
6044    },
6045    Lint {
6046        label: "core_io_internals",
6047        description: r##"# `core_io_internals`
6048
6049
6050
6051This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
6052
6053------------------------
6054"##,
6055        default_severity: Severity::Allow,
6056        warn_since: None,
6057        deny_since: None,
6058    },
6059    Lint {
6060        label: "core_private_bignum",
6061        description: r##"# `core_private_bignum`
6062
6063This feature is internal to the Rust compiler and is not intended for general use.
6064
6065------------------------
6066"##,
6067        default_severity: Severity::Allow,
6068        warn_since: None,
6069        deny_since: None,
6070    },
6071    Lint {
6072        label: "core_private_diy_float",
6073        description: r##"# `core_private_diy_float`
6074
6075This feature is internal to the Rust compiler and is not intended for general use.
6076
6077------------------------
6078"##,
6079        default_severity: Severity::Allow,
6080        warn_since: None,
6081        deny_since: None,
6082    },
6083    Lint {
6084        label: "coroutine_clone",
6085        description: r##"# `coroutine_clone`
6086
6087Allows coroutines to be cloned.
6088
6089The tracking issue for this feature is: [#95360]
6090
6091[#95360]: https://github.com/rust-lang/rust/issues/95360
6092
6093------------------------
6094"##,
6095        default_severity: Severity::Allow,
6096        warn_since: None,
6097        deny_since: None,
6098    },
6099    Lint {
6100        label: "coroutine_trait",
6101        description: r##"# `coroutine_trait`
6102
6103
6104
6105The tracking issue for this feature is: [#43122]
6106
6107[#43122]: https://github.com/rust-lang/rust/issues/43122
6108
6109------------------------
6110"##,
6111        default_severity: Severity::Allow,
6112        warn_since: None,
6113        deny_since: None,
6114    },
6115    Lint {
6116        label: "coroutines",
6117        description: r##"# `coroutines`
6118
6119The tracking issue for this feature is: [#43122]
6120
6121[#43122]: https://github.com/rust-lang/rust/issues/43122
6122
6123------------------------
6124
6125The `coroutines` feature gate in Rust allows you to define coroutine or
6126coroutine literals. A coroutine is a "resumable function" that syntactically
6127resembles a closure but compiles to much different semantics in the compiler
6128itself. The primary feature of a coroutine is that it can be suspended during
6129execution to be resumed at a later date. Coroutines use the `yield` keyword to
6130"return", and then the caller can `resume` a coroutine to resume execution just
6131after the `yield` keyword.
6132
6133Coroutines are an extra-unstable feature in the compiler right now. Added in
6134[RFC 2033] they're mostly intended right now as a information/constraint
6135gathering phase. The intent is that experimentation can happen on the nightly
6136compiler before actual stabilization. A further RFC will be required to
6137stabilize coroutines and will likely contain at least a few small
6138tweaks to the overall design.
6139
6140[RFC 2033]: https://github.com/rust-lang/rfcs/pull/2033
6141
6142A syntactical example of a coroutine is:
6143
6144```rust
6145#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
6146
6147use std::ops::{Coroutine, CoroutineState};
6148use std::pin::Pin;
6149
6150fn main() {
6151    let mut coroutine = #[coroutine] || {
6152        yield 1;
6153        return "foo"
6154    };
6155
6156    match Pin::new(&mut coroutine).resume(()) {
6157        CoroutineState::Yielded(1) => {}
6158        _ => panic!("unexpected value from resume"),
6159    }
6160    match Pin::new(&mut coroutine).resume(()) {
6161        CoroutineState::Complete("foo") => {}
6162        _ => panic!("unexpected value from resume"),
6163    }
6164}
6165```
6166
6167Coroutines are closure-like literals which are annotated with `#[coroutine]`
6168and can contain a `yield` statement. The
6169`yield` statement takes an optional expression of a value to yield out of the
6170coroutine. All coroutine literals implement the `Coroutine` trait in the
6171`std::ops` module. The `Coroutine` trait has one main method, `resume`, which
6172resumes execution of the coroutine at the previous suspension point.
6173
6174An example of the control flow of coroutines is that the following example
6175prints all numbers in order:
6176
6177```rust
6178#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
6179
6180use std::ops::Coroutine;
6181use std::pin::Pin;
6182
6183fn main() {
6184    let mut coroutine = #[coroutine] || {
6185        println!("2");
6186        yield;
6187        println!("4");
6188    };
6189
6190    println!("1");
6191    Pin::new(&mut coroutine).resume(());
6192    println!("3");
6193    Pin::new(&mut coroutine).resume(());
6194    println!("5");
6195}
6196```
6197
6198At this time the main use case of coroutines is an implementation
6199primitive for `async`/`await` and `gen` syntax, but coroutines
6200will likely be extended to other primitives in the future.
6201Feedback on the design and usage is always appreciated!
6202
6203### The `Coroutine` trait
6204
6205The `Coroutine` trait in `std::ops` currently looks like:
6206
6207```rust
6208# #![feature(arbitrary_self_types, coroutine_trait)]
6209# use std::ops::CoroutineState;
6210# use std::pin::Pin;
6211
6212pub trait Coroutine<R = ()> {
6213    type Yield;
6214    type Return;
6215    fn resume(self: Pin<&mut Self>, resume: R) -> CoroutineState<Self::Yield, Self::Return>;
6216}
6217```
6218
6219The `Coroutine::Yield` type is the type of values that can be yielded with the
6220`yield` statement. The `Coroutine::Return` type is the returned type of the
6221coroutine. This is typically the last expression in a coroutine's definition or
6222any value passed to `return` in a coroutine. The `resume` function is the entry
6223point for executing the `Coroutine` itself.
6224
6225The return value of `resume`, `CoroutineState`, looks like:
6226
6227```rust
6228pub enum CoroutineState<Y, R> {
6229    Yielded(Y),
6230    Complete(R),
6231}
6232```
6233
6234The `Yielded` variant indicates that the coroutine can later be resumed. This
6235corresponds to a `yield` point in a coroutine. The `Complete` variant indicates
6236that the coroutine is complete and cannot be resumed again. Calling `resume`
6237after a coroutine has returned `Complete` will likely result in a panic of the
6238program.
6239
6240### Closure-like semantics
6241
6242The closure-like syntax for coroutines alludes to the fact that they also have
6243closure-like semantics. Namely:
6244
6245* When created, a coroutine executes no code. A closure literal does not
6246  actually execute any of the closure's code on construction, and similarly a
6247  coroutine literal does not execute any code inside the coroutine when
6248  constructed.
6249
6250* Coroutines can capture outer variables by reference or by move, and this can
6251  be tweaked with the `move` keyword at the beginning of the closure. Like
6252  closures all coroutines will have an implicit environment which is inferred by
6253  the compiler. Outer variables can be moved into a coroutine for use as the
6254  coroutine progresses.
6255
6256* Coroutine literals produce a value with a unique type which implements the
6257  `std::ops::Coroutine` trait. This allows actual execution of the coroutine
6258  through the `Coroutine::resume` method as well as also naming it in return
6259  types and such.
6260
6261* Traits like `Send` and `Sync` are automatically implemented for a `Coroutine`
6262  depending on the captured variables of the environment. Unlike closures,
6263  coroutines also depend on variables live across suspension points. This means
6264  that although the ambient environment may be `Send` or `Sync`, the coroutine
6265  itself may not be due to internal variables live across `yield` points being
6266  not-`Send` or not-`Sync`. Note that coroutines do
6267  not implement traits like `Copy` or `Clone` automatically.
6268
6269* Whenever a coroutine is dropped it will drop all captured environment
6270  variables.
6271
6272### Coroutines as state machines
6273
6274In the compiler, coroutines are currently compiled as state machines. Each
6275`yield` expression will correspond to a different state that stores all live
6276variables over that suspension point. Resumption of a coroutine will dispatch on
6277the current state and then execute internally until a `yield` is reached, at
6278which point all state is saved off in the coroutine and a value is returned.
6279
6280Let's take a look at an example to see what's going on here:
6281
6282```rust
6283#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
6284
6285use std::ops::Coroutine;
6286use std::pin::Pin;
6287
6288fn main() {
6289    let ret = "foo";
6290    let mut coroutine = #[coroutine] move || {
6291        yield 1;
6292        return ret
6293    };
6294
6295    Pin::new(&mut coroutine).resume(());
6296    Pin::new(&mut coroutine).resume(());
6297}
6298```
6299
6300This coroutine literal will compile down to something similar to:
6301
6302```rust
6303#![feature(arbitrary_self_types, coroutine_trait)]
6304
6305use std::ops::{Coroutine, CoroutineState};
6306use std::pin::Pin;
6307
6308fn main() {
6309    let ret = "foo";
6310    let mut coroutine = {
6311        enum __Coroutine {
6312            Start(&'static str),
6313            Yield1(&'static str),
6314            Done,
6315        }
6316
6317        impl Coroutine for __Coroutine {
6318            type Yield = i32;
6319            type Return = &'static str;
6320
6321            fn resume(mut self: Pin<&mut Self>, resume: ()) -> CoroutineState<i32, &'static str> {
6322                use std::mem;
6323                match mem::replace(&mut *self, __Coroutine::Done) {
6324                    __Coroutine::Start(s) => {
6325                        *self = __Coroutine::Yield1(s);
6326                        CoroutineState::Yielded(1)
6327                    }
6328
6329                    __Coroutine::Yield1(s) => {
6330                        *self = __Coroutine::Done;
6331                        CoroutineState::Complete(s)
6332                    }
6333
6334                    __Coroutine::Done => {
6335                        panic!("coroutine resumed after completion")
6336                    }
6337                }
6338            }
6339        }
6340
6341        __Coroutine::Start(ret)
6342    };
6343
6344    Pin::new(&mut coroutine).resume(());
6345    Pin::new(&mut coroutine).resume(());
6346}
6347```
6348
6349Notably here we can see that the compiler is generating a fresh type,
6350`__Coroutine` in this case. This type has a number of states (represented here
6351as an `enum`) corresponding to each of the conceptual states of the coroutine.
6352At the beginning we're closing over our outer variable `foo` and then that
6353variable is also live over the `yield` point, so it's stored in both states.
6354
6355When the coroutine starts it'll immediately yield 1, but it saves off its state
6356just before it does so indicating that it has reached the yield point. Upon
6357resuming again we'll execute the `return ret` which returns the `Complete`
6358state.
6359
6360Here we can also note that the `Done` state, if resumed, panics immediately as
6361it's invalid to resume a completed coroutine. It's also worth noting that this
6362is just a rough desugaring, not a normative specification for what the compiler
6363does.
6364"##,
6365        default_severity: Severity::Allow,
6366        warn_since: None,
6367        deny_since: None,
6368    },
6369    Lint {
6370        label: "coverage_attribute",
6371        description: r##"# `coverage_attribute`
6372
6373The tracking issue for this feature is: [#84605]
6374
6375[#84605]: https://github.com/rust-lang/rust/issues/84605
6376
6377---
6378
6379The `coverage` attribute can be used to selectively disable coverage
6380instrumentation in an annotated function. This might be useful to:
6381
6382-   Avoid instrumentation overhead in a performance critical function
6383-   Avoid generating coverage for a function that is not meant to be executed,
6384    but still target 100% coverage for the rest of the program.
6385
6386## Example
6387
6388```rust
6389#![feature(coverage_attribute)]
6390
6391// `foo()` will get coverage instrumentation (by default)
6392fn foo() {
6393  // ...
6394}
6395
6396#[coverage(off)]
6397fn bar() {
6398  // ...
6399}
6400```
6401"##,
6402        default_severity: Severity::Allow,
6403        warn_since: None,
6404        deny_since: None,
6405    },
6406    Lint {
6407        label: "cow_is_borrowed",
6408        description: r##"# `cow_is_borrowed`
6409
6410
6411
6412The tracking issue for this feature is: [#65143]
6413
6414[#65143]: https://github.com/rust-lang/rust/issues/65143
6415
6416------------------------
6417"##,
6418        default_severity: Severity::Allow,
6419        warn_since: None,
6420        deny_since: None,
6421    },
6422    Lint {
6423        label: "csky_target_feature",
6424        description: r##"# `csky_target_feature`
6425
6426Target features on csky.
6427
6428The tracking issue for this feature is: [#150248]
6429
6430[#150248]: https://github.com/rust-lang/rust/issues/150248
6431
6432------------------------
6433"##,
6434        default_severity: Severity::Allow,
6435        warn_since: None,
6436        deny_since: None,
6437    },
6438    Lint {
6439        label: "cstr_bytes",
6440        description: r##"# `cstr_bytes`
6441
6442
6443
6444The tracking issue for this feature is: [#112115]
6445
6446[#112115]: https://github.com/rust-lang/rust/issues/112115
6447
6448------------------------
6449"##,
6450        default_severity: Severity::Allow,
6451        warn_since: None,
6452        deny_since: None,
6453    },
6454    Lint {
6455        label: "cstr_display",
6456        description: r##"# `cstr_display`
6457
6458
6459
6460The tracking issue for this feature is: [#139984]
6461
6462[#139984]: https://github.com/rust-lang/rust/issues/139984
6463
6464------------------------
6465"##,
6466        default_severity: Severity::Allow,
6467        warn_since: None,
6468        deny_since: None,
6469    },
6470    Lint {
6471        label: "cstr_internals",
6472        description: r##"# `cstr_internals`
6473
6474
6475
6476This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
6477
6478------------------------
6479"##,
6480        default_severity: Severity::Allow,
6481        warn_since: None,
6482        deny_since: None,
6483    },
6484    Lint {
6485        label: "current_thread_id",
6486        description: r##"# `current_thread_id`
6487
6488
6489
6490The tracking issue for this feature is: [#147194]
6491
6492[#147194]: https://github.com/rust-lang/rust/issues/147194
6493
6494------------------------
6495"##,
6496        default_severity: Severity::Allow,
6497        warn_since: None,
6498        deny_since: None,
6499    },
6500    Lint {
6501        label: "cursor_split",
6502        description: r##"# `cursor_split`
6503
6504
6505
6506The tracking issue for this feature is: [#86369]
6507
6508[#86369]: https://github.com/rust-lang/rust/issues/86369
6509
6510------------------------
6511"##,
6512        default_severity: Severity::Allow,
6513        warn_since: None,
6514        deny_since: None,
6515    },
6516    Lint {
6517        label: "custom_inner_attributes",
6518        description: r##"# `custom_inner_attributes`
6519
6520Allows non-builtin attributes in inner attribute position.
6521
6522The tracking issue for this feature is: [#54726]
6523
6524[#54726]: https://github.com/rust-lang/rust/issues/54726
6525
6526------------------------
6527"##,
6528        default_severity: Severity::Allow,
6529        warn_since: None,
6530        deny_since: None,
6531    },
6532    Lint {
6533        label: "custom_mir",
6534        description: r##"# `custom_mir`
6535
6536Allows writing custom MIR
6537
6538This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
6539
6540------------------------
6541"##,
6542        default_severity: Severity::Allow,
6543        warn_since: None,
6544        deny_since: None,
6545    },
6546    Lint {
6547        label: "custom_test_frameworks",
6548        description: r##"# `custom_test_frameworks`
6549
6550The tracking issue for this feature is: [#50297]
6551
6552[#50297]: https://github.com/rust-lang/rust/issues/50297
6553
6554------------------------
6555
6556The `custom_test_frameworks` feature allows the use of `#[test_case]` and `#![test_runner]`.
6557Any function, const, or static can be annotated with `#[test_case]` causing it to be aggregated (like `#[test]`)
6558and be passed to the test runner determined by the `#![test_runner]` crate attribute.
6559
6560```rust
6561#![feature(custom_test_frameworks)]
6562#![test_runner(my_runner)]
6563
6564fn my_runner(tests: &[&i32]) {
6565    for t in tests {
6566        if **t == 0 {
6567            println!("PASSED");
6568        } else {
6569            println!("FAILED");
6570        }
6571    }
6572}
6573
6574#[test_case]
6575const WILL_PASS: i32 = 0;
6576
6577#[test_case]
6578const WILL_FAIL: i32 = 4;
6579```
6580"##,
6581        default_severity: Severity::Allow,
6582        warn_since: None,
6583        deny_since: None,
6584    },
6585    Lint {
6586        label: "darwin_objc",
6587        description: r##"# `darwin_objc`
6588
6589
6590
6591The tracking issue for this feature is: [#145496]
6592
6593[#145496]: https://github.com/rust-lang/rust/issues/145496
6594
6595------------------------
6596"##,
6597        default_severity: Severity::Allow,
6598        warn_since: None,
6599        deny_since: None,
6600    },
6601    Lint {
6602        label: "deadline_api",
6603        description: r##"# `deadline_api`
6604
6605
6606
6607The tracking issue for this feature is: [#46316]
6608
6609[#46316]: https://github.com/rust-lang/rust/issues/46316
6610
6611------------------------
6612"##,
6613        default_severity: Severity::Allow,
6614        warn_since: None,
6615        deny_since: None,
6616    },
6617    Lint {
6618        label: "debug_closure_helpers",
6619        description: r##"# `debug_closure_helpers`
6620
6621
6622
6623The tracking issue for this feature is: [#117729]
6624
6625[#117729]: https://github.com/rust-lang/rust/issues/117729
6626
6627------------------------
6628"##,
6629        default_severity: Severity::Allow,
6630        warn_since: None,
6631        deny_since: None,
6632    },
6633    Lint {
6634        label: "dec2flt",
6635        description: r##"# `dec2flt`
6636
6637This feature is internal to the Rust compiler and is not intended for general use.
6638
6639------------------------
6640"##,
6641        default_severity: Severity::Allow,
6642        warn_since: None,
6643        deny_since: None,
6644    },
6645    Lint {
6646        label: "decl_macro",
6647        description: r##"# `decl_macro`
6648
6649Allows declarative macros 2.0 (`macro`).
6650
6651The tracking issue for this feature is: [#39412]
6652
6653[#39412]: https://github.com/rust-lang/rust/issues/39412
6654
6655------------------------
6656"##,
6657        default_severity: Severity::Allow,
6658        warn_since: None,
6659        deny_since: None,
6660    },
6661    Lint {
6662        label: "default_field_values",
6663        description: r##"# `default_field_values`
6664
6665The tracking issue for this feature is: [#132162]
6666
6667[#132162]: https://github.com/rust-lang/rust/issues/132162
6668
6669The RFC for this feature is: [#3681]
6670
6671[#3681]: https://github.com/rust-lang/rfcs/blob/master/text/3681-default-field-values.md
6672
6673------------------------
6674
6675The `default_field_values` feature allows users to specify a const value for
6676individual fields in struct definitions, allowing those to be omitted from
6677initializers.
6678
6679## Examples
6680
6681```rust
6682#![feature(default_field_values)]
6683
6684#[derive(Default)]
6685struct Pet {
6686    name: Option<String>, // impl Default for Pet will use Default::default() for name
6687    age: i128 = 42, // impl Default for Pet will use the literal 42 for age
6688}
6689
6690fn main() {
6691    let a = Pet { name: Some(String::new()), .. }; // Pet { name: Some(""), age: 42 }
6692    let b = Pet::default(); // Pet { name: None, age: 42 }
6693    assert_eq!(a.age, b.age);
6694    // The following would be a compilation error: `name` needs to be specified
6695    // let _ = Pet { .. };
6696}
6697```
6698
6699## `#[derive(Default)]`
6700
6701When deriving Default, the provided values are then used. On enum variants,
6702the variant must still be marked with `#[default]` and have all its fields
6703with default values.
6704
6705```rust
6706#![feature(default_field_values)]
6707
6708#[derive(Default)]
6709enum A {
6710    #[default]
6711    B {
6712        x: i32 = 0,
6713        y: i32 = 0,
6714    },
6715    C,
6716}
6717```
6718
6719## Enum variants
6720
6721This feature also supports enum variants for both specifying default values
6722and `#[derive(Default)]`.
6723
6724## Interaction with `#[non_exhaustive]`
6725
6726A struct or enum variant marked with `#[non_exhaustive]` is not allowed to
6727have default field values.
6728
6729## Lints
6730
6731When manually implementing the `Default` trait for a type that has default
6732field values, if any of these are overridden in the impl the
6733`default_overrides_default_fields` lint will trigger. This lint is in place
6734to avoid surprising diverging behavior between `S { .. }` and
6735`S::default()`, where using the same type in both ways could result in
6736different values. The appropriate way to write a manual `Default`
6737implementation is to use the functional update syntax:
6738
6739```rust
6740#![feature(default_field_values)]
6741
6742struct Pet {
6743    name: String,
6744    age: i128 = 42, // impl Default for Pet will use the literal 42 for age
6745}
6746
6747impl Default for Pet {
6748    fn default() -> Pet {
6749        Pet {
6750            name: "no-name".to_string(),
6751            ..
6752        }
6753    }
6754}
6755```
6756"##,
6757        default_severity: Severity::Allow,
6758        warn_since: None,
6759        deny_since: None,
6760    },
6761    Lint {
6762        label: "deprecated_suggestion",
6763        description: r##"# `deprecated_suggestion`
6764
6765Allows having using `suggestion` in the `#[deprecated]` attribute.
6766
6767The tracking issue for this feature is: [#94785]
6768
6769[#94785]: https://github.com/rust-lang/rust/issues/94785
6770
6771------------------------
6772"##,
6773        default_severity: Severity::Allow,
6774        warn_since: None,
6775        deny_since: None,
6776    },
6777    Lint {
6778        label: "deque_extend_front",
6779        description: r##"# `deque_extend_front`
6780
6781
6782
6783The tracking issue for this feature is: [#146975]
6784
6785[#146975]: https://github.com/rust-lang/rust/issues/146975
6786
6787------------------------
6788"##,
6789        default_severity: Severity::Allow,
6790        warn_since: None,
6791        deny_since: None,
6792    },
6793    Lint {
6794        label: "deref_patterns",
6795        description: r##"# `deref_patterns`
6796
6797The tracking issue for this feature is: [#87121]
6798
6799[#87121]: https://github.com/rust-lang/rust/issues/87121
6800
6801------------------------
6802
6803> **Note**: This feature supersedes [`box_patterns`].
6804
6805This feature permits pattern matching on [smart pointers in the standard library] through their
6806`Deref` target types, either implicitly or with explicit `deref!(_)` patterns (the syntax of which
6807is currently a placeholder).
6808
6809```rust
6810#![feature(deref_patterns)]
6811
6812let mut v = vec![Box::new(Some(0))];
6813
6814// Implicit dereferences are inserted when a pattern can match against the
6815// result of repeatedly dereferencing but can't match against a smart
6816// pointer itself. This works alongside match ergonomics for references.
6817if let [Some(x)] = &mut v {
6818    *x += 1;
6819}
6820
6821// Explicit `deref!(_)` patterns may instead be used when finer control is
6822// needed, e.g. to dereference only a single smart pointer, or to bind the
6823// the result of dereferencing to a variable.
6824if let deref!([deref!(opt_x @ Some(1))]) = &mut v {
6825    opt_x.as_mut().map(|x| *x += 1);
6826}
6827
6828assert_eq!(v, [Box::new(Some(2))]);
6829```
6830
6831Without this feature, it may be necessary to introduce temporaries to represent dereferenced places
6832when matching on nested structures:
6833
6834```rust
6835let mut v = vec![Box::new(Some(0))];
6836if let [b] = &mut *v {
6837    if let Some(x) = &mut **b {
6838        *x += 1;
6839    }
6840}
6841if let [b] = &mut *v {
6842    if let opt_x @ Some(1) = &mut **b {
6843        opt_x.as_mut().map(|x| *x += 1);
6844    }
6845}
6846assert_eq!(v, [Box::new(Some(2))]);
6847```
6848
6849Like [`box_patterns`], deref patterns may move out of boxes:
6850
6851```rust
6852# #![feature(deref_patterns)]
6853struct NoCopy;
6854let deref!(x) = Box::new(NoCopy);
6855drop::<NoCopy>(x);
6856```
6857
6858Additionally, `deref_patterns` implements changes to string and byte string literal patterns,
6859allowing then to be used in deref patterns:
6860
6861```rust
6862# #![feature(deref_patterns)]
6863match ("test".to_string(), Box::from("test"), b"test".to_vec()) {
6864    ("test", "test", b"test") => {}
6865    _ => panic!(),
6866}
6867
6868// This works through multiple layers of reference and smart pointer:
6869match (&Box::new(&"test".to_string()), &&&"test") {
6870    ("test", "test") => {}
6871    _ => panic!(),
6872}
6873
6874// `deref!("...")` syntax may also be used:
6875match "test".to_string() {
6876    deref!("test") => {}
6877    _ => panic!(),
6878}
6879
6880// Matching on slices and arrays using literals is possible elsewhere as well:
6881match *"test" {
6882    "test" => {}
6883    _ => panic!(),
6884}
6885match *b"test" {
6886    b"test" => {}
6887    _ => panic!(),
6888}
6889match *(b"test" as &[u8]) {
6890    b"test" => {}
6891    _ => panic!(),
6892}
6893```
6894
6895[`box_patterns`]: ./box-patterns.md
6896[smart pointers in the standard library]: https://doc.rust-lang.org/std/ops/trait.DerefPure.html#implementors
6897"##,
6898        default_severity: Severity::Allow,
6899        warn_since: None,
6900        deny_since: None,
6901    },
6902    Lint {
6903        label: "deref_pure_trait",
6904        description: r##"# `deref_pure_trait`
6905
6906
6907
6908The tracking issue for this feature is: [#87121]
6909
6910[#87121]: https://github.com/rust-lang/rust/issues/87121
6911
6912------------------------
6913"##,
6914        default_severity: Severity::Allow,
6915        warn_since: None,
6916        deny_since: None,
6917    },
6918    Lint {
6919        label: "derive_clone_copy_internals",
6920        description: r##"# `derive_clone_copy_internals`
6921
6922This feature is internal to the Rust compiler and is not intended for general use.
6923
6924------------------------
6925"##,
6926        default_severity: Severity::Allow,
6927        warn_since: None,
6928        deny_since: None,
6929    },
6930    Lint {
6931        label: "derive_coerce_pointee",
6932        description: r##"# `derive_coerce_pointee`
6933
6934
6935
6936The tracking issue for this feature is: [#123430]
6937
6938[#123430]: https://github.com/rust-lang/rust/issues/123430
6939
6940------------------------
6941"##,
6942        default_severity: Severity::Allow,
6943        warn_since: None,
6944        deny_since: None,
6945    },
6946    Lint {
6947        label: "derive_const",
6948        description: r##"# `derive_const`
6949
6950
6951
6952The tracking issue for this feature is: [#118304]
6953
6954[#118304]: https://github.com/rust-lang/rust/issues/118304
6955
6956------------------------
6957"##,
6958        default_severity: Severity::Allow,
6959        warn_since: None,
6960        deny_since: None,
6961    },
6962    Lint {
6963        label: "derive_eq_internals",
6964        description: r##"# `derive_eq_internals`
6965
6966This feature is internal to the Rust compiler and is not intended for general use.
6967
6968------------------------
6969"##,
6970        default_severity: Severity::Allow,
6971        warn_since: None,
6972        deny_since: None,
6973    },
6974    Lint {
6975        label: "derive_from",
6976        description: r##"# `derive_from`
6977
6978Allows deriving the From trait on single-field structs.
6979
6980The tracking issue for this feature is: [#144889]
6981
6982[#144889]: https://github.com/rust-lang/rust/issues/144889
6983
6984------------------------
6985"##,
6986        default_severity: Severity::Allow,
6987        warn_since: None,
6988        deny_since: None,
6989    },
6990    Lint {
6991        label: "derive_macro_global_path",
6992        description: r##"# `derive_macro_global_path`
6993
6994
6995
6996The tracking issue for this feature is: [#154645]
6997
6998[#154645]: https://github.com/rust-lang/rust/issues/154645
6999
7000------------------------
7001"##,
7002        default_severity: Severity::Allow,
7003        warn_since: None,
7004        deny_since: None,
7005    },
7006    Lint {
7007        label: "diagnostic_on_const",
7008        description: r##"# `diagnostic_on_const`
7009
7010Allows giving non-const impls custom diagnostic messages if attempted to be used as const
7011
7012The tracking issue for this feature is: [#143874]
7013
7014[#143874]: https://github.com/rust-lang/rust/issues/143874
7015
7016------------------------
7017"##,
7018        default_severity: Severity::Allow,
7019        warn_since: None,
7020        deny_since: None,
7021    },
7022    Lint {
7023        label: "diagnostic_on_move",
7024        description: r##"# `diagnostic_on_move`
7025
7026The tracking issue for this feature is: [#154181]
7027
7028------------------------
7029
7030The `diagnostic_on_move` feature allows use of the `#[diagnostic::on_move]` attribute. It should be
7031placed on struct, enum and union declarations, though it is not an error to be located in other
7032positions. This attribute is a hint to the compiler to supplement the error message when the
7033annotated type is involved in a borrowcheck error.
7034
7035For example, [`File`] is annotated as such:
7036```rust
7037#![feature(diagnostic_on_move)]
7038
7039#[diagnostic::on_move(note = "you can use `File::try_clone` \
7040                             to duplicate a `File` instance")]
7041pub struct File {
7042    // ...
7043}
7044```
7045
7046When you try to use a `File` after it's already been moved, it will helpfully tell you about `try_clone`.
7047
7048The message and label can also be customized:
7049
7050```rust
7051#![feature(diagnostic_on_move)]
7052
7053use std::marker::PhantomData;
7054
7055#[diagnostic::on_move(
7056    message = "`{Self}` cannot be used multiple times",
7057    label = "this token may only be used once",
7058    note = "you can create a new `Token` with `Token::conjure()`"
7059)]
7060pub struct Token<'brand> {
7061    spooky: PhantomData<&'brand ()>,
7062}
7063
7064impl Token<'_> {
7065    pub fn conjure<'u>() -> Token<'u> {
7066        Token {
7067            spooky: PhantomData,
7068        }
7069    }
7070}
7071```
7072The user may try to use it like this:
7073```rust,compile_fail,E0382
7074# #![feature(diagnostic_on_move)]
7075#
7076# use std::marker::PhantomData;
7077#
7078# #[diagnostic::on_move(
7079#     message = "`{Self}` cannot be used multiple times",
7080#     label = "this token may only be used once",
7081#     note = "you can create a new `Token` with `Token::conjure()`"
7082# )]
7083# pub struct Token<'brand> {
7084#     spooky: PhantomData<&'brand ()>,
7085# }
7086#
7087# impl Token<'_> {
7088#     pub fn conjure<'u>() -> Token<'u> {
7089#         Token {
7090#             spooky: PhantomData,
7091#         }
7092#     }
7093# }
7094# fn main() {
7095let token = Token::conjure();
7096let _ = (token, token);
7097# }
7098```
7099This will result in the following error:
7100```text
7101error[E0382]: `Token` cannot be used multiple times
7102  --> src/main.rs:24:21
7103   |
7104 1 |     let token = Token::conjure();
7105   |         ----- this token may only be used once
7106 2 |     let _ = (token, token);
7107   |              -----  ^^^^^ value used here after move
7108   |              |
7109   |              value moved here
7110   |
7111   = note: you can create a new `Token` with `Token::conjure()`
7112```
7113
7114[`File`]: https://doc.rust-lang.org/nightly/std/fs/struct.File.html "File in std::fs"
7115[#154181]: https://github.com/rust-lang/rust/issues/154181 "Tracking Issue for #[diagnostic::on_move]"
7116"##,
7117        default_severity: Severity::Allow,
7118        warn_since: None,
7119        deny_since: None,
7120    },
7121    Lint {
7122        label: "diagnostic_on_unknown",
7123        description: r##"# `diagnostic_on_unknown`
7124
7125Allows giving unresolved imports a custom diagnostic message
7126
7127The tracking issue for this feature is: [#152900]
7128
7129[#152900]: https://github.com/rust-lang/rust/issues/152900
7130
7131------------------------
7132"##,
7133        default_severity: Severity::Allow,
7134        warn_since: None,
7135        deny_since: None,
7136    },
7137    Lint {
7138        label: "diagnostic_on_unmatch_args",
7139        description: r##"# `diagnostic_on_unmatch_args`
7140
7141The tracking issue for this feature is: [#155642]
7142
7143[#155642]: https://github.com/rust-lang/rust/issues/155642
7144
7145------------------------
7146
7147The `diagnostic_on_unmatch_args` feature adds the
7148`#[diagnostic::on_unmatch_args(...)]` attribute for declarative macros.
7149It lets a macro definition customize diagnostics for matcher failures after all arms have been
7150tried, such as incomplete invocations or trailing extra arguments.
7151
7152This attribute currently applies to declarative macros such as `macro_rules!` and `pub macro`.
7153It is currently used for errors emitted by declarative macro matching itself; fragment parser
7154errors still use their existing diagnostics.
7155
7156```rust,compile_fail
7157#![feature(diagnostic_on_unmatch_args)]
7158
7159#[diagnostic::on_unmatch_args(
7160    message = "invalid arguments to {This} macro invocation",
7161    label = "expected a type and value here",
7162    note = "this macro expects a type and a value, like `pair!(u8, 0)`",
7163    note = "see <link/to/docs>",
7164)]
7165macro_rules! pair {
7166    ($ty:ty, $value:expr) => {};
7167}
7168
7169pair!(u8);
7170```
7171
7172This emits output like:
7173
7174```text
7175error: invalid arguments to pair macro invocation
7176  --> example.rs:13:9
7177   |
71789  | macro_rules! pair {
7179   | ----------------- when calling this macro
7180...
718113 | pair!(u8);
7182   |         ^ expected a type and value here
7183   |
7184note: while trying to match `,`
7185  --> example.rs:10:12
7186   |
718710 |     ($ty:ty, $value:expr) => {};
7188   |            ^
7189   = note: this macro expects a type and a value, like `pair!(u8, 0)`
7190   = note: see <link/to/docs>
7191```
7192"##,
7193        default_severity: Severity::Allow,
7194        warn_since: None,
7195        deny_since: None,
7196    },
7197    Lint {
7198        label: "dir_entry_ext2",
7199        description: r##"# `dir_entry_ext2`
7200
7201
7202
7203The tracking issue for this feature is: [#85573]
7204
7205[#85573]: https://github.com/rust-lang/rust/issues/85573
7206
7207------------------------
7208"##,
7209        default_severity: Severity::Allow,
7210        warn_since: None,
7211        deny_since: None,
7212    },
7213    Lint {
7214        label: "dirfd",
7215        description: r##"# `dirfd`
7216
7217
7218
7219The tracking issue for this feature is: [#120426]
7220
7221[#120426]: https://github.com/rust-lang/rust/issues/120426
7222
7223------------------------
7224"##,
7225        default_severity: Severity::Allow,
7226        warn_since: None,
7227        deny_since: None,
7228    },
7229    Lint {
7230        label: "dirhandle",
7231        description: r##"# `dirhandle`
7232
7233
7234
7235The tracking issue for this feature is: [#120426]
7236
7237[#120426]: https://github.com/rust-lang/rust/issues/120426
7238
7239------------------------
7240"##,
7241        default_severity: Severity::Allow,
7242        warn_since: None,
7243        deny_since: None,
7244    },
7245    Lint {
7246        label: "discriminant_kind",
7247        description: r##"# `discriminant_kind`
7248
7249
7250
7251This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
7252
7253------------------------
7254"##,
7255        default_severity: Severity::Allow,
7256        warn_since: None,
7257        deny_since: None,
7258    },
7259    Lint {
7260        label: "disjoint_bitor",
7261        description: r##"# `disjoint_bitor`
7262
7263
7264
7265The tracking issue for this feature is: [#135758]
7266
7267[#135758]: https://github.com/rust-lang/rust/issues/135758
7268
7269------------------------
7270"##,
7271        default_severity: Severity::Allow,
7272        warn_since: None,
7273        deny_since: None,
7274    },
7275    Lint {
7276        label: "dispatch_from_dyn",
7277        description: r##"# `dispatch_from_dyn`
7278
7279
7280
7281This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
7282
7283------------------------
7284"##,
7285        default_severity: Severity::Allow,
7286        warn_since: None,
7287        deny_since: None,
7288    },
7289    Lint {
7290        label: "doc_cfg",
7291        description: r##"# `doc_cfg`
7292
7293The tracking issue for this feature is: [#43781]
7294
7295------
7296
7297The `doc_cfg` feature allows an API be documented as only available in some specific platforms.
7298This attribute has two effects:
7299
73001. In the annotated item's documentation, there will be a message saying "Available on
7301    (platform) only".
7302
73032. The item's doc-tests will only run on the specific platform.
7304
7305In addition to allowing the use of the `#[doc(cfg)]` attribute, this feature enables the use of a
7306special conditional compilation flag, `#[cfg(doc)]`, set whenever building documentation on your
7307crate.
7308
7309This feature was introduced as part of PR [#43348] to allow the platform-specific parts of the
7310standard library be documented.
7311
7312```rust
7313#![feature(doc_cfg)]
7314
7315#[cfg(any(windows, doc))]
7316#[doc(cfg(windows))]
7317/// The application's icon in the notification area (a.k.a. system tray).
7318///
7319/// # Examples
7320///
7321/// ```no_run
7322/// extern crate my_awesome_ui_library;
7323/// use my_awesome_ui_library::current_app;
7324/// use my_awesome_ui_library::windows::notification;
7325///
7326/// let icon = current_app().get::<notification::Icon>();
7327/// icon.show();
7328/// icon.show_message("Hello");
7329/// ```
7330pub struct Icon {
7331    // ...
7332}
7333```
7334
7335[#43781]: https://github.com/rust-lang/rust/issues/43781
7336[#43348]: https://github.com/rust-lang/rust/issues/43348
7337"##,
7338        default_severity: Severity::Allow,
7339        warn_since: None,
7340        deny_since: None,
7341    },
7342    Lint {
7343        label: "doc_masked",
7344        description: r##"# `doc_masked`
7345
7346The tracking issue for this feature is: [#44027]
7347
7348-----
7349
7350The `doc_masked` feature allows a crate to exclude types from a given crate from appearing in lists
7351of trait implementations. The specifics of the feature are as follows:
7352
73531. When rustdoc encounters an `extern crate` statement annotated with a `#[doc(masked)]` attribute,
7354   it marks the crate as being masked.
7355
73562. When listing traits a given type implements, rustdoc ensures that traits from masked crates are
7357   not emitted into the documentation.
7358
73593. When listing types that implement a given trait, rustdoc ensures that types from masked crates
7360   are not emitted into the documentation.
7361
7362This feature was introduced in PR [#44026] to ensure that compiler-internal and
7363implementation-specific types and traits were not included in the standard library's documentation.
7364Such types would introduce broken links into the documentation.
7365
7366[#44026]: https://github.com/rust-lang/rust/pull/44026
7367[#44027]: https://github.com/rust-lang/rust/pull/44027
7368"##,
7369        default_severity: Severity::Allow,
7370        warn_since: None,
7371        deny_since: None,
7372    },
7373    Lint {
7374        label: "doc_notable_trait",
7375        description: r##"# `doc_notable_trait`
7376
7377The tracking issue for this feature is: [#45040]
7378
7379The `doc_notable_trait` feature allows the use of the `#[doc(notable_trait)]`
7380attribute, which will display the trait in a "Notable traits" dialog for
7381functions returning types that implement the trait. For example, this attribute
7382is applied to the `Iterator`, `Future`, `io::Read`, and `io::Write` traits in
7383the standard library.
7384
7385You can do this on your own traits like so:
7386
7387```
7388#![feature(doc_notable_trait)]
7389
7390#[doc(notable_trait)]
7391pub trait MyTrait {}
7392
7393pub struct MyStruct;
7394impl MyTrait for MyStruct {}
7395
7396/// The docs for this function will have a button that displays a dialog about
7397/// `MyStruct` implementing `MyTrait`.
7398pub fn my_fn() -> MyStruct { MyStruct }
7399```
7400
7401This feature was originally implemented in PR [#45039].
7402
7403See also its documentation in [the rustdoc book][rustdoc-book-notable_trait].
7404
7405[#45040]: https://github.com/rust-lang/rust/issues/45040
7406[#45039]: https://github.com/rust-lang/rust/pull/45039
7407[rustdoc-book-notable_trait]: ../../rustdoc/unstable-features.html#adding-your-trait-to-the-notable-traits-dialog
7408"##,
7409        default_severity: Severity::Allow,
7410        warn_since: None,
7411        deny_since: None,
7412    },
7413    Lint {
7414        label: "downcast_unchecked",
7415        description: r##"# `downcast_unchecked`
7416
7417
7418
7419The tracking issue for this feature is: [#90850]
7420
7421[#90850]: https://github.com/rust-lang/rust/issues/90850
7422
7423------------------------
7424"##,
7425        default_severity: Severity::Allow,
7426        warn_since: None,
7427        deny_since: None,
7428    },
7429    Lint {
7430        label: "drain_keep_rest",
7431        description: r##"# `drain_keep_rest`
7432
7433
7434
7435The tracking issue for this feature is: [#101122]
7436
7437[#101122]: https://github.com/rust-lang/rust/issues/101122
7438
7439------------------------
7440"##,
7441        default_severity: Severity::Allow,
7442        warn_since: None,
7443        deny_since: None,
7444    },
7445    Lint {
7446        label: "drop_guard",
7447        description: r##"# `drop_guard`
7448
7449
7450
7451The tracking issue for this feature is: [#144426]
7452
7453[#144426]: https://github.com/rust-lang/rust/issues/144426
7454
7455------------------------
7456"##,
7457        default_severity: Severity::Allow,
7458        warn_since: None,
7459        deny_since: None,
7460    },
7461    Lint {
7462        label: "dropck_eyepatch",
7463        description: r##"# `dropck_eyepatch`
7464
7465Allows using the `may_dangle` attribute (RFC 1327).
7466
7467The tracking issue for this feature is: [#34761]
7468
7469[#34761]: https://github.com/rust-lang/rust/issues/34761
7470
7471------------------------
7472"##,
7473        default_severity: Severity::Allow,
7474        warn_since: None,
7475        deny_since: None,
7476    },
7477    Lint {
7478        label: "duration_constants",
7479        description: r##"# `duration_constants`
7480
7481
7482
7483The tracking issue for this feature is: [#57391]
7484
7485[#57391]: https://github.com/rust-lang/rust/issues/57391
7486
7487------------------------
7488"##,
7489        default_severity: Severity::Allow,
7490        warn_since: None,
7491        deny_since: None,
7492    },
7493    Lint {
7494        label: "duration_constructors",
7495        description: r##"# `duration_constructors`
7496
7497The tracking issue for this feature is: [#120301]
7498
7499[#120301]: https://github.com/rust-lang/rust/issues/120301
7500
7501------------------------
7502
7503Add the methods `from_days` and `from_weeks` to `Duration`.
7504"##,
7505        default_severity: Severity::Allow,
7506        warn_since: None,
7507        deny_since: None,
7508    },
7509    Lint {
7510        label: "duration_integer_division",
7511        description: r##"# `duration_integer_division`
7512
7513
7514
7515The tracking issue for this feature is: [#149573]
7516
7517[#149573]: https://github.com/rust-lang/rust/issues/149573
7518
7519------------------------
7520"##,
7521        default_severity: Severity::Allow,
7522        warn_since: None,
7523        deny_since: None,
7524    },
7525    Lint {
7526        label: "duration_millis_float",
7527        description: r##"# `duration_millis_float`
7528
7529
7530
7531The tracking issue for this feature is: [#122451]
7532
7533[#122451]: https://github.com/rust-lang/rust/issues/122451
7534
7535------------------------
7536"##,
7537        default_severity: Severity::Allow,
7538        warn_since: None,
7539        deny_since: None,
7540    },
7541    Lint {
7542        label: "duration_units",
7543        description: r##"# `duration_units`
7544
7545
7546
7547The tracking issue for this feature is: [#120301]
7548
7549[#120301]: https://github.com/rust-lang/rust/issues/120301
7550
7551------------------------
7552"##,
7553        default_severity: Severity::Allow,
7554        warn_since: None,
7555        deny_since: None,
7556    },
7557    Lint {
7558        label: "edition_panic",
7559        description: r##"# `edition_panic`
7560
7561
7562
7563This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
7564
7565------------------------
7566"##,
7567        default_severity: Severity::Allow,
7568        warn_since: None,
7569        deny_since: None,
7570    },
7571    Lint {
7572        label: "effective_target_features",
7573        description: r##"# `effective_target_features`
7574
7575Allows features to allow target_feature to better interact with traits.
7576
7577The tracking issue for this feature is: [#143352]
7578
7579[#143352]: https://github.com/rust-lang/rust/issues/143352
7580
7581------------------------
7582"##,
7583        default_severity: Severity::Allow,
7584        warn_since: None,
7585        deny_since: None,
7586    },
7587    Lint {
7588        label: "eii_internals",
7589        description: r##"# `eii_internals`
7590
7591Implementation details of externally implementable items
7592
7593This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
7594
7595------------------------
7596"##,
7597        default_severity: Severity::Allow,
7598        warn_since: None,
7599        deny_since: None,
7600    },
7601    Lint {
7602        label: "ergonomic_clones",
7603        description: r##"# `ergonomic_clones`
7604
7605Allows the .use postfix syntax `x.use` and use closures `use |x| { ... }`
7606
7607The tracking issue for this feature is: [#132290]
7608
7609[#132290]: https://github.com/rust-lang/rust/issues/132290
7610
7611------------------------
7612"##,
7613        default_severity: Severity::Allow,
7614        warn_since: None,
7615        deny_since: None,
7616    },
7617    Lint {
7618        label: "ermsb_target_feature",
7619        description: r##"# `ermsb_target_feature`
7620
7621ermsb target feature on x86.
7622
7623The tracking issue for this feature is: [#150249]
7624
7625[#150249]: https://github.com/rust-lang/rust/issues/150249
7626
7627------------------------
7628"##,
7629        default_severity: Severity::Allow,
7630        warn_since: None,
7631        deny_since: None,
7632    },
7633    Lint {
7634        label: "error_generic_member_access",
7635        description: r##"# `error_generic_member_access`
7636
7637
7638
7639The tracking issue for this feature is: [#99301]
7640
7641[#99301]: https://github.com/rust-lang/rust/issues/99301
7642
7643------------------------
7644"##,
7645        default_severity: Severity::Allow,
7646        warn_since: None,
7647        deny_since: None,
7648    },
7649    Lint {
7650        label: "error_iter",
7651        description: r##"# `error_iter`
7652
7653
7654
7655The tracking issue for this feature is: [#58520]
7656
7657[#58520]: https://github.com/rust-lang/rust/issues/58520
7658
7659------------------------
7660"##,
7661        default_severity: Severity::Allow,
7662        warn_since: None,
7663        deny_since: None,
7664    },
7665    Lint {
7666        label: "error_reporter",
7667        description: r##"# `error_reporter`
7668
7669
7670
7671The tracking issue for this feature is: [#90172]
7672
7673[#90172]: https://github.com/rust-lang/rust/issues/90172
7674
7675------------------------
7676"##,
7677        default_severity: Severity::Allow,
7678        warn_since: None,
7679        deny_since: None,
7680    },
7681    Lint {
7682        label: "error_type_id",
7683        description: r##"# `error_type_id`
7684
7685
7686
7687The tracking issue for this feature is: [#60784]
7688
7689[#60784]: https://github.com/rust-lang/rust/issues/60784
7690
7691------------------------
7692"##,
7693        default_severity: Severity::Allow,
7694        warn_since: None,
7695        deny_since: None,
7696    },
7697    Lint {
7698        label: "exact_bitshifts",
7699        description: r##"# `exact_bitshifts`
7700
7701
7702
7703The tracking issue for this feature is: [#144336]
7704
7705[#144336]: https://github.com/rust-lang/rust/issues/144336
7706
7707------------------------
7708"##,
7709        default_severity: Severity::Allow,
7710        warn_since: None,
7711        deny_since: None,
7712    },
7713    Lint {
7714        label: "exact_div",
7715        description: r##"# `exact_div`
7716
7717
7718
7719The tracking issue for this feature is: [#139911]
7720
7721[#139911]: https://github.com/rust-lang/rust/issues/139911
7722
7723------------------------
7724"##,
7725        default_severity: Severity::Allow,
7726        warn_since: None,
7727        deny_since: None,
7728    },
7729    Lint {
7730        label: "exact_size_is_empty",
7731        description: r##"# `exact_size_is_empty`
7732
7733
7734
7735The tracking issue for this feature is: [#35428]
7736
7737[#35428]: https://github.com/rust-lang/rust/issues/35428
7738
7739------------------------
7740"##,
7741        default_severity: Severity::Allow,
7742        warn_since: None,
7743        deny_since: None,
7744    },
7745    Lint {
7746        label: "exclusive_wrapper",
7747        description: r##"# `exclusive_wrapper`
7748
7749
7750
7751The tracking issue for this feature is: [#98407]
7752
7753[#98407]: https://github.com/rust-lang/rust/issues/98407
7754
7755------------------------
7756"##,
7757        default_severity: Severity::Allow,
7758        warn_since: None,
7759        deny_since: None,
7760    },
7761    Lint {
7762        label: "exhaustive_patterns",
7763        description: r##"# `exhaustive_patterns`
7764
7765Allows exhaustive pattern matching on types that contain uninhabited types.
7766
7767The tracking issue for this feature is: [#51085]
7768
7769[#51085]: https://github.com/rust-lang/rust/issues/51085
7770
7771------------------------
7772"##,
7773        default_severity: Severity::Allow,
7774        warn_since: None,
7775        deny_since: None,
7776    },
7777    Lint {
7778        label: "exit_status_error",
7779        description: r##"# `exit_status_error`
7780
7781
7782
7783The tracking issue for this feature is: [#84908]
7784
7785[#84908]: https://github.com/rust-lang/rust/issues/84908
7786
7787------------------------
7788"##,
7789        default_severity: Severity::Allow,
7790        warn_since: None,
7791        deny_since: None,
7792    },
7793    Lint {
7794        label: "exitcode_exit_method",
7795        description: r##"# `exitcode_exit_method`
7796
7797
7798
7799The tracking issue for this feature is: [#97100]
7800
7801[#97100]: https://github.com/rust-lang/rust/issues/97100
7802
7803------------------------
7804"##,
7805        default_severity: Severity::Allow,
7806        warn_since: None,
7807        deny_since: None,
7808    },
7809    Lint {
7810        label: "explicit_extern_abis",
7811        description: r##"# `explicit_extern_abis`
7812
7813The tracking issue for this feature is: [#134986]
7814
7815------
7816
7817Disallow `extern` without an explicit ABI. We should write `extern "C"`
7818(or another ABI) instead of just `extern`.
7819
7820By making the ABI explicit, it becomes much clearer that "C" is just one of the
7821possible choices, rather than the "standard" way for external functions.
7822Removing the default makes it easier to add a new ABI on equal footing as "C".
7823
7824```rust,editionfuture,compile_fail
7825#![feature(explicit_extern_abis)]
7826
7827extern fn function1() {}  // ERROR `extern` declarations without an explicit ABI
7828                          // are disallowed
7829
7830extern "C" fn function2() {} // compiles
7831
7832extern "aapcs" fn function3() {} // compiles
7833```
7834
7835[#134986]: https://github.com/rust-lang/rust/issues/134986
7836"##,
7837        default_severity: Severity::Allow,
7838        warn_since: None,
7839        deny_since: None,
7840    },
7841    Lint {
7842        label: "explicit_tail_calls",
7843        description: r##"# `explicit_tail_calls`
7844
7845Allows explicit tail calls via `become` expression.
7846
7847The tracking issue for this feature is: [#112788]
7848
7849[#112788]: https://github.com/rust-lang/rust/issues/112788
7850
7851------------------------
7852"##,
7853        default_severity: Severity::Allow,
7854        warn_since: None,
7855        deny_since: None,
7856    },
7857    Lint {
7858        label: "export_stable",
7859        description: r##"# `export_stable`
7860
7861Allows using `#[export_stable]` which indicates that an item is exportable.
7862
7863The tracking issue for this feature is: [#139939]
7864
7865[#139939]: https://github.com/rust-lang/rust/issues/139939
7866
7867------------------------
7868"##,
7869        default_severity: Severity::Allow,
7870        warn_since: None,
7871        deny_since: None,
7872    },
7873    Lint {
7874        label: "extend_one",
7875        description: r##"# `extend_one`
7876
7877
7878
7879The tracking issue for this feature is: [#72631]
7880
7881[#72631]: https://github.com/rust-lang/rust/issues/72631
7882
7883------------------------
7884"##,
7885        default_severity: Severity::Allow,
7886        warn_since: None,
7887        deny_since: None,
7888    },
7889    Lint {
7890        label: "extend_one_unchecked",
7891        description: r##"# `extend_one_unchecked`
7892
7893
7894
7895This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
7896
7897------------------------
7898"##,
7899        default_severity: Severity::Allow,
7900        warn_since: None,
7901        deny_since: None,
7902    },
7903    Lint {
7904        label: "extern_item_impls",
7905        description: r##"# `extern_item_impls`
7906
7907Externally implementable items
7908
7909The tracking issue for this feature is: [#125418]
7910
7911[#125418]: https://github.com/rust-lang/rust/issues/125418
7912
7913------------------------
7914"##,
7915        default_severity: Severity::Allow,
7916        warn_since: None,
7917        deny_since: None,
7918    },
7919    Lint {
7920        label: "extern_types",
7921        description: r##"# `extern_types`
7922
7923Allows defining `extern type`s.
7924
7925The tracking issue for this feature is: [#43467]
7926
7927[#43467]: https://github.com/rust-lang/rust/issues/43467
7928
7929------------------------
7930"##,
7931        default_severity: Severity::Allow,
7932        warn_since: None,
7933        deny_since: None,
7934    },
7935    Lint {
7936        label: "f128",
7937        description: r##"# `f128`
7938
7939The tracking issue for this feature is: [#116909]
7940
7941[#116909]: https://github.com/rust-lang/rust/issues/116909
7942
7943---
7944
7945Enable the `f128` type for IEEE 128-bit floating numbers (quad precision).
7946"##,
7947        default_severity: Severity::Allow,
7948        warn_since: None,
7949        deny_since: None,
7950    },
7951    Lint {
7952        label: "f16",
7953        description: r##"# `f16`
7954
7955The tracking issue for this feature is: [#116909]
7956
7957[#116909]: https://github.com/rust-lang/rust/issues/116909
7958
7959---
7960
7961Enable the `f16` type for IEEE 16-bit floating numbers (half precision).
7962"##,
7963        default_severity: Severity::Allow,
7964        warn_since: None,
7965        deny_since: None,
7966    },
7967    Lint {
7968        label: "f32_from_f16",
7969        description: r##"# `f32_from_f16`
7970
7971
7972
7973The tracking issue for this feature is: [#154005]
7974
7975[#154005]: https://github.com/rust-lang/rust/issues/154005
7976
7977------------------------
7978"##,
7979        default_severity: Severity::Allow,
7980        warn_since: None,
7981        deny_since: None,
7982    },
7983    Lint {
7984        label: "fd",
7985        description: r##"# `fd`
7986
7987This feature is internal to the Rust compiler and is not intended for general use.
7988
7989------------------------
7990"##,
7991        default_severity: Severity::Allow,
7992        warn_since: None,
7993        deny_since: None,
7994    },
7995    Lint {
7996        label: "ffi_const",
7997        description: r##"# `ffi_const`
7998
7999The tracking issue for this feature is: [#58328]
8000
8001------
8002
8003The `#[ffi_const]` attribute applies clang's `const` attribute to foreign
8004functions declarations.
8005
8006That is, `#[ffi_const]` functions shall have no effects except for its return
8007value, which can only depend on the values of the function parameters, and is
8008not affected by changes to the observable state of the program.
8009
8010Applying the `#[ffi_const]` attribute to a function that violates these
8011requirements is undefined behaviour.
8012
8013This attribute enables Rust to perform common optimizations, like sub-expression
8014elimination, and it can avoid emitting some calls in repeated invocations of the
8015function with the same argument values regardless of other operations being
8016performed in between these functions calls (as opposed to `#[ffi_pure]`
8017functions).
8018
8019## Pitfalls
8020
8021A `#[ffi_const]` function can only read global memory that would not affect
8022its return value for the whole execution of the program (e.g. immutable global
8023memory). `#[ffi_const]` functions are referentially-transparent and therefore
8024more strict than `#[ffi_pure]` functions.
8025
8026A common pitfall involves applying the `#[ffi_const]` attribute to a
8027function that reads memory through pointer arguments which do not necessarily
8028point to immutable global memory.
8029
8030A `#[ffi_const]` function that returns unit has no effect on the abstract
8031machine's state, and a `#[ffi_const]` function cannot be `#[ffi_pure]`.
8032
8033A `#[ffi_const]` function must not diverge, neither via a side effect (e.g. a
8034call to `abort`) nor by infinite loops.
8035
8036When translating C headers to Rust FFI, it is worth verifying for which targets
8037the `const` attribute is enabled in those headers, and using the appropriate
8038`cfg` macros in the Rust side to match those definitions. While the semantics of
8039`const` are implemented identically by many C and C++ compilers, e.g., clang,
8040[GCC], [ARM C/C++ compiler], [IBM ILE C/C++], etc. they are not necessarily
8041implemented in this way on all of them. It is therefore also worth verifying
8042that the semantics of the C toolchain used to compile the binary being linked
8043against are compatible with those of the `#[ffi_const]`.
8044
8045[#58328]: https://github.com/rust-lang/rust/issues/58328
8046[ARM C/C++ compiler]: http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0491c/Cacgigch.html
8047[GCC]: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-const-function-attribute
8048[IBM ILE C/C++]: https://www.ibm.com/support/knowledgecenter/fr/ssw_ibm_i_71/rzarg/fn_attrib_const.htm
8049"##,
8050        default_severity: Severity::Allow,
8051        warn_since: None,
8052        deny_since: None,
8053    },
8054    Lint {
8055        label: "ffi_pure",
8056        description: r##"# `ffi_pure`
8057
8058The tracking issue for this feature is: [#58329]
8059
8060------
8061
8062The `#[ffi_pure]` attribute applies clang's `pure` attribute to foreign
8063functions declarations.
8064
8065That is, `#[ffi_pure]` functions shall have no effects except for its return
8066value, which shall not change across two consecutive function calls with
8067the same parameters.
8068
8069Applying the `#[ffi_pure]` attribute to a function that violates these
8070requirements is undefined behavior.
8071
8072This attribute enables Rust to perform common optimizations, like sub-expression
8073elimination and loop optimizations. Some common examples of pure functions are
8074`strlen` or `memcmp`.
8075
8076These optimizations are only applicable when the compiler can prove that no
8077program state observable by the `#[ffi_pure]` function has changed between calls
8078of the function, which could alter the result. See also the `#[ffi_const]`
8079attribute, which provides stronger guarantees regarding the allowable behavior
8080of a function, enabling further optimization.
8081
8082## Pitfalls
8083
8084A `#[ffi_pure]` function can read global memory through the function
8085parameters (e.g. pointers), globals, etc. `#[ffi_pure]` functions are not
8086referentially-transparent, and are therefore more relaxed than `#[ffi_const]`
8087functions.
8088
8089However, accessing global memory through volatile or atomic reads can violate the
8090requirement that two consecutive function calls shall return the same value.
8091
8092A `pure` function that returns unit has no effect on the abstract machine's
8093state.
8094
8095A `#[ffi_pure]` function must not diverge, neither via a side effect (e.g. a
8096call to `abort`) nor by infinite loops.
8097
8098When translating C headers to Rust FFI, it is worth verifying for which targets
8099the `pure` attribute is enabled in those headers, and using the appropriate
8100`cfg` macros in the Rust side to match those definitions. While the semantics of
8101`pure` are implemented identically by many C and C++ compilers, e.g., clang,
8102[GCC], [ARM C/C++ compiler], [IBM ILE C/C++], etc. they are not necessarily
8103implemented in this way on all of them. It is therefore also worth verifying
8104that the semantics of the C toolchain used to compile the binary being linked
8105against are compatible with those of the `#[ffi_pure]`.
8106
8107
8108[#58329]: https://github.com/rust-lang/rust/issues/58329
8109[ARM C/C++ compiler]: http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0491c/Cacigdac.html
8110[GCC]: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-pure-function-attribute
8111[IBM ILE C/C++]: https://www.ibm.com/support/knowledgecenter/fr/ssw_ibm_i_71/rzarg/fn_attrib_pure.htm
8112"##,
8113        default_severity: Severity::Allow,
8114        warn_since: None,
8115        deny_since: None,
8116    },
8117    Lint {
8118        label: "field_projections",
8119        description: r##"# `field_projections`
8120
8121Experimental field projections.
8122
8123The tracking issue for this feature is: [#145383]
8124
8125[#145383]: https://github.com/rust-lang/rust/issues/145383
8126
8127------------------------
8128"##,
8129        default_severity: Severity::Allow,
8130        warn_since: None,
8131        deny_since: None,
8132    },
8133    Lint {
8134        label: "field_representing_type_raw",
8135        description: r##"# `field_representing_type_raw`
8136
8137Implementation details of field representing types.
8138
8139This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
8140
8141------------------------
8142"##,
8143        default_severity: Severity::Allow,
8144        warn_since: None,
8145        deny_since: None,
8146    },
8147    Lint {
8148        label: "file_buffered",
8149        description: r##"# `file_buffered`
8150
8151
8152
8153The tracking issue for this feature is: [#130804]
8154
8155[#130804]: https://github.com/rust-lang/rust/issues/130804
8156
8157------------------------
8158"##,
8159        default_severity: Severity::Allow,
8160        warn_since: None,
8161        deny_since: None,
8162    },
8163    Lint {
8164        label: "final_associated_functions",
8165        description: r##"# `final_associated_functions`
8166
8167Allows marking trait functions as `final` to prevent overriding impls
8168
8169The tracking issue for this feature is: [#131179]
8170
8171[#131179]: https://github.com/rust-lang/rust/issues/131179
8172
8173------------------------
8174"##,
8175        default_severity: Severity::Allow,
8176        warn_since: None,
8177        deny_since: None,
8178    },
8179    Lint {
8180        label: "float_algebraic",
8181        description: r##"# `float_algebraic`
8182
8183
8184
8185The tracking issue for this feature is: [#136469]
8186
8187[#136469]: https://github.com/rust-lang/rust/issues/136469
8188
8189------------------------
8190"##,
8191        default_severity: Severity::Allow,
8192        warn_since: None,
8193        deny_since: None,
8194    },
8195    Lint {
8196        label: "float_bits_const",
8197        description: r##"# `float_bits_const`
8198
8199
8200
8201The tracking issue for this feature is: [#151073]
8202
8203[#151073]: https://github.com/rust-lang/rust/issues/151073
8204
8205------------------------
8206"##,
8207        default_severity: Severity::Allow,
8208        warn_since: None,
8209        deny_since: None,
8210    },
8211    Lint {
8212        label: "float_erf",
8213        description: r##"# `float_erf`
8214
8215
8216
8217The tracking issue for this feature is: [#136321]
8218
8219[#136321]: https://github.com/rust-lang/rust/issues/136321
8220
8221------------------------
8222"##,
8223        default_severity: Severity::Allow,
8224        warn_since: None,
8225        deny_since: None,
8226    },
8227    Lint {
8228        label: "float_exact_integer_constants",
8229        description: r##"# `float_exact_integer_constants`
8230
8231
8232
8233The tracking issue for this feature is: [#152466]
8234
8235[#152466]: https://github.com/rust-lang/rust/issues/152466
8236
8237------------------------
8238"##,
8239        default_severity: Severity::Allow,
8240        warn_since: None,
8241        deny_since: None,
8242    },
8243    Lint {
8244        label: "float_gamma",
8245        description: r##"# `float_gamma`
8246
8247
8248
8249The tracking issue for this feature is: [#99842]
8250
8251[#99842]: https://github.com/rust-lang/rust/issues/99842
8252
8253------------------------
8254"##,
8255        default_severity: Severity::Allow,
8256        warn_since: None,
8257        deny_since: None,
8258    },
8259    Lint {
8260        label: "float_masks",
8261        description: r##"# `float_masks`
8262
8263
8264
8265The tracking issue for this feature is: [#154064]
8266
8267[#154064]: https://github.com/rust-lang/rust/issues/154064
8268
8269------------------------
8270"##,
8271        default_severity: Severity::Allow,
8272        warn_since: None,
8273        deny_since: None,
8274    },
8275    Lint {
8276        label: "float_minimum_maximum",
8277        description: r##"# `float_minimum_maximum`
8278
8279
8280
8281The tracking issue for this feature is: [#91079]
8282
8283[#91079]: https://github.com/rust-lang/rust/issues/91079
8284
8285------------------------
8286"##,
8287        default_severity: Severity::Allow,
8288        warn_since: None,
8289        deny_since: None,
8290    },
8291    Lint {
8292        label: "flt2dec",
8293        description: r##"# `flt2dec`
8294
8295This feature is internal to the Rust compiler and is not intended for general use.
8296
8297------------------------
8298"##,
8299        default_severity: Severity::Allow,
8300        warn_since: None,
8301        deny_since: None,
8302    },
8303    Lint {
8304        label: "fma4_target_feature",
8305        description: r##"# `fma4_target_feature`
8306
8307fma4 target feature on x86.
8308
8309The tracking issue for this feature is: [#155233]
8310
8311[#155233]: https://github.com/rust-lang/rust/issues/155233
8312
8313------------------------
8314"##,
8315        default_severity: Severity::Allow,
8316        warn_since: None,
8317        deny_since: None,
8318    },
8319    Lint {
8320        label: "fmt_arguments_from_str",
8321        description: r##"# `fmt_arguments_from_str`
8322
8323
8324
8325The tracking issue for this feature is: [#148905]
8326
8327[#148905]: https://github.com/rust-lang/rust/issues/148905
8328
8329------------------------
8330"##,
8331        default_severity: Severity::Allow,
8332        warn_since: None,
8333        deny_since: None,
8334    },
8335    Lint {
8336        label: "fmt_debug",
8337        description: r##"# `fmt_debug`
8338
8339Controlling the behavior of fmt::Debug
8340
8341The tracking issue for this feature is: [#129709]
8342
8343[#129709]: https://github.com/rust-lang/rust/issues/129709
8344
8345------------------------
8346"##,
8347        default_severity: Severity::Allow,
8348        warn_since: None,
8349        deny_since: None,
8350    },
8351    Lint {
8352        label: "fmt_helpers_for_derive",
8353        description: r##"# `fmt_helpers_for_derive`
8354
8355
8356
8357This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
8358
8359------------------------
8360"##,
8361        default_severity: Severity::Allow,
8362        warn_since: None,
8363        deny_since: None,
8364    },
8365    Lint {
8366        label: "fmt_internals",
8367        description: r##"# `fmt_internals`
8368
8369This feature is internal to the Rust compiler and is not intended for general use.
8370
8371------------------------
8372"##,
8373        default_severity: Severity::Allow,
8374        warn_since: None,
8375        deny_since: None,
8376    },
8377    Lint {
8378        label: "fn_align",
8379        description: r##"# `fn_align`
8380
8381Allows using `#[align(...)]` on function items
8382
8383The tracking issue for this feature is: [#82232]
8384
8385[#82232]: https://github.com/rust-lang/rust/issues/82232
8386
8387------------------------
8388"##,
8389        default_severity: Severity::Allow,
8390        warn_since: None,
8391        deny_since: None,
8392    },
8393    Lint {
8394        label: "fn_delegation",
8395        description: r##"# `fn_delegation`
8396
8397Support delegating implementation of functions to other already implemented functions.
8398
8399The tracking issue for this feature is: [#118212]
8400
8401[#118212]: https://github.com/rust-lang/rust/issues/118212
8402
8403------------------------
8404"##,
8405        default_severity: Severity::Allow,
8406        warn_since: None,
8407        deny_since: None,
8408    },
8409    Lint {
8410        label: "fn_ptr_trait",
8411        description: r##"# `fn_ptr_trait`
8412
8413
8414
8415This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
8416
8417------------------------
8418"##,
8419        default_severity: Severity::Allow,
8420        warn_since: None,
8421        deny_since: None,
8422    },
8423    Lint {
8424        label: "fn_traits",
8425        description: r##"# `fn_traits`
8426
8427The tracking issue for this feature is [#29625]
8428
8429See Also: [`unboxed_closures`](../language-features/unboxed-closures.md)
8430
8431[#29625]: https://github.com/rust-lang/rust/issues/29625
8432
8433----
8434
8435The `fn_traits` feature allows for implementation of the [`Fn*`] traits
8436for creating custom closure-like types.
8437
8438[`Fn*`]: ../../std/ops/trait.Fn.html
8439
8440```rust
8441#![feature(unboxed_closures)]
8442#![feature(fn_traits)]
8443
8444struct Adder {
8445    a: u32
8446}
8447
8448impl FnOnce<(u32, )> for Adder {
8449    type Output = u32;
8450    extern "rust-call" fn call_once(self, b: (u32, )) -> Self::Output {
8451        self.a + b.0
8452    }
8453}
8454
8455fn main() {
8456    let adder = Adder { a: 3 };
8457    assert_eq!(adder(2), 5);
8458}
8459```
8460"##,
8461        default_severity: Severity::Allow,
8462        warn_since: None,
8463        deny_since: None,
8464    },
8465    Lint {
8466        label: "forget_unsized",
8467        description: r##"# `forget_unsized`
8468
8469
8470
8471This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
8472
8473------------------------
8474"##,
8475        default_severity: Severity::Allow,
8476        warn_since: None,
8477        deny_since: None,
8478    },
8479    Lint {
8480        label: "format_args_nl",
8481        description: r##"# `format_args_nl`
8482
8483
8484
8485This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
8486
8487------------------------
8488"##,
8489        default_severity: Severity::Allow,
8490        warn_since: None,
8491        deny_since: None,
8492    },
8493    Lint {
8494        label: "formatting_options",
8495        description: r##"# `formatting_options`
8496
8497
8498
8499The tracking issue for this feature is: [#118117]
8500
8501[#118117]: https://github.com/rust-lang/rust/issues/118117
8502
8503------------------------
8504"##,
8505        default_severity: Severity::Allow,
8506        warn_since: None,
8507        deny_since: None,
8508    },
8509    Lint {
8510        label: "freeze",
8511        description: r##"# `freeze`
8512
8513
8514
8515The tracking issue for this feature is: [#121675]
8516
8517[#121675]: https://github.com/rust-lang/rust/issues/121675
8518
8519------------------------
8520"##,
8521        default_severity: Severity::Allow,
8522        warn_since: None,
8523        deny_since: None,
8524    },
8525    Lint {
8526        label: "freeze_impls",
8527        description: r##"# `freeze_impls`
8528
8529Allows impls for the Freeze trait.
8530
8531The tracking issue for this feature is: [#121675]
8532
8533[#121675]: https://github.com/rust-lang/rust/issues/121675
8534
8535------------------------
8536"##,
8537        default_severity: Severity::Allow,
8538        warn_since: None,
8539        deny_since: None,
8540    },
8541    Lint {
8542        label: "frontmatter",
8543        description: r##"# `frontmatter`
8544
8545The tracking issue for this feature is: [#136889]
8546
8547------
8548
8549The `frontmatter` feature allows an extra metadata block at the top of files for consumption by
8550external tools. For example, it can be used by [`cargo-script`] files to specify dependencies.
8551
8552```rust
8553#!/usr/bin/env -S cargo -Zscript
8554---
8555[dependencies]
8556libc = "0.2.172"
8557---
8558#![feature(frontmatter)]
8559# mod libc { pub type c_int = i32; }
8560
8561fn main() {
8562    let x: libc::c_int = 1i32;
8563}
8564```
8565
8566[#136889]: https://github.com/rust-lang/rust/issues/136889
8567[`cargo-script`]: https://rust-lang.github.io/rfcs/3502-cargo-script.html
8568"##,
8569        default_severity: Severity::Allow,
8570        warn_since: None,
8571        deny_since: None,
8572    },
8573    Lint {
8574        label: "fs_set_times",
8575        description: r##"# `fs_set_times`
8576
8577
8578
8579The tracking issue for this feature is: [#147455]
8580
8581[#147455]: https://github.com/rust-lang/rust/issues/147455
8582
8583------------------------
8584"##,
8585        default_severity: Severity::Allow,
8586        warn_since: None,
8587        deny_since: None,
8588    },
8589    Lint {
8590        label: "fundamental",
8591        description: r##"# `fundamental`
8592
8593Allows using the `#[fundamental]` attribute.
8594
8595The tracking issue for this feature is: [#29635]
8596
8597[#29635]: https://github.com/rust-lang/rust/issues/29635
8598
8599------------------------
8600"##,
8601        default_severity: Severity::Allow,
8602        warn_since: None,
8603        deny_since: None,
8604    },
8605    Lint {
8606        label: "funnel_shifts",
8607        description: r##"# `funnel_shifts`
8608
8609
8610
8611The tracking issue for this feature is: [#145686]
8612
8613[#145686]: https://github.com/rust-lang/rust/issues/145686
8614
8615------------------------
8616"##,
8617        default_severity: Severity::Allow,
8618        warn_since: None,
8619        deny_since: None,
8620    },
8621    Lint {
8622        label: "future_join",
8623        description: r##"# `future_join`
8624
8625
8626
8627The tracking issue for this feature is: [#91642]
8628
8629[#91642]: https://github.com/rust-lang/rust/issues/91642
8630
8631------------------------
8632"##,
8633        default_severity: Severity::Allow,
8634        warn_since: None,
8635        deny_since: None,
8636    },
8637    Lint {
8638        label: "gen_blocks",
8639        description: r##"# `gen_blocks`
8640
8641Allows defining gen blocks and `gen fn`.
8642
8643The tracking issue for this feature is: [#117078]
8644
8645[#117078]: https://github.com/rust-lang/rust/issues/117078
8646
8647------------------------
8648"##,
8649        default_severity: Severity::Allow,
8650        warn_since: None,
8651        deny_since: None,
8652    },
8653    Lint {
8654        label: "gen_future",
8655        description: r##"# `gen_future`
8656
8657
8658
8659This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
8660
8661------------------------
8662"##,
8663        default_severity: Severity::Allow,
8664        warn_since: None,
8665        deny_since: None,
8666    },
8667    Lint {
8668        label: "generic_assert",
8669        description: r##"# `generic_assert`
8670
8671Outputs useful `assert!` messages
8672
8673This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
8674
8675------------------------
8676"##,
8677        default_severity: Severity::Allow,
8678        warn_since: None,
8679        deny_since: None,
8680    },
8681    Lint {
8682        label: "generic_assert_internals",
8683        description: r##"# `generic_assert_internals`
8684
8685
8686
8687The tracking issue for this feature is: [#44838]
8688
8689[#44838]: https://github.com/rust-lang/rust/issues/44838
8690
8691------------------------
8692"##,
8693        default_severity: Severity::Allow,
8694        warn_since: None,
8695        deny_since: None,
8696    },
8697    Lint {
8698        label: "generic_atomic",
8699        description: r##"# `generic_atomic`
8700
8701
8702
8703The tracking issue for this feature is: [#130539]
8704
8705[#130539]: https://github.com/rust-lang/rust/issues/130539
8706
8707------------------------
8708"##,
8709        default_severity: Severity::Allow,
8710        warn_since: None,
8711        deny_since: None,
8712    },
8713    Lint {
8714        label: "generic_const_args",
8715        description: r##"# generic_const_args
8716
8717Allows using generics in more complex const expressions, based on definitional equality.
8718
8719The tracking issue for this feature is: [#151972]
8720
8721[#151972]: https://github.com/rust-lang/rust/issues/151972
8722
8723------------------------
8724
8725Warning: This feature is incomplete; its design and syntax may change.
8726
8727This feature enables many of the same use cases supported by [generic_const_exprs],
8728but based on the machinery developed for [min_generic_const_args]. In a way, it is
8729meant to be an interim successor for GCE (though it might not currently support all
8730the valid cases that supported by GCE).
8731
8732See also: [generic_const_items]
8733
8734[min_generic_const_args]: min-generic-const-args.md
8735[generic_const_exprs]: generic-const-exprs.md
8736[generic_const_items]: generic-const-items.md
8737
8738## Examples
8739
8740<!-- NOTE(ignore) generic_const_args requires -Znext-solver to compile -->
8741```rust,ignore (requires-Z-next-solver)
8742#![feature(generic_const_items)]
8743#![feature(min_generic_const_args)]
8744#![feature(generic_const_args)]
8745#![expect(incomplete_features)]
8746
8747type const ADD1<const N: usize>: usize = const { N + 1 };
8748
8749type const INC<const N: usize>: usize = ADD1::<N>;
8750
8751const ARR: [(); ADD1::<0>] = [(); INC::<0>];
8752```
8753"##,
8754        default_severity: Severity::Allow,
8755        warn_since: None,
8756        deny_since: None,
8757    },
8758    Lint {
8759        label: "generic_const_exprs",
8760        description: r##"# generic_const_exprs
8761
8762Allows non-trivial generic constants which have to be shown to successfully evaluate
8763to a value by being part of an item signature.
8764
8765The tracking issue for this feature is: [#76560]
8766
8767
8768[#76560]: https://github.com/rust-lang/rust/issues/76560
8769
8770------------------------
8771
8772Warning: This feature is incomplete; its design and syntax may change.
8773
8774See also: [min_generic_const_args], [generic_const_args]
8775
8776[min_generic_const_args]: min-generic-const-args.md
8777[generic_const_args]: generic-const-args.md
8778
8779## Examples
8780
8781```rust
8782#![allow(incomplete_features)]
8783#![feature(generic_const_exprs)]
8784
8785// Use parameters that depend on a generic argument.
8786struct Foo<const N: usize>
8787where
8788    [(); N + 1]:,
8789{
8790    array: [usize; N + 1],
8791}
8792
8793// Use generic parameters in const operations.
8794trait Bar {
8795    const X: usize;
8796    const Y: usize;
8797}
8798
8799// Note `B::X * B::Y`.
8800const fn baz<B: Bar>(x: [usize; B::X], y: [usize; B::Y]) -> [usize; B::X * B::Y] {
8801    let mut out = [0; B::X * B::Y];
8802    let mut i = 0;
8803    while i < B::Y {
8804        let mut j = 0;
8805        while j < B::X {
8806            out[i * B::X + j] = y[i].saturating_mul(x[j]);
8807            j += 1;
8808        }
8809        i += 1;
8810    }
8811    out
8812}
8813
8814
8815// Create a new type based on a generic argument.
8816pub struct Grow<const N: usize> {
8817    arr: [usize; N],
8818}
8819
8820impl<const N: usize> Grow<N> {
8821    pub const fn grow(self, val: usize) -> Grow<{ N + 1 }> {
8822        let mut new_arr = [0; { N + 1 }];
8823        let mut idx = 0;
8824        while idx < N {
8825            new_arr[idx] = self.arr[idx];
8826            idx += 1;
8827        }
8828        new_arr[N] = val;
8829        Grow { arr: new_arr }
8830    }
8831}
8832```
8833"##,
8834        default_severity: Severity::Allow,
8835        warn_since: None,
8836        deny_since: None,
8837    },
8838    Lint {
8839        label: "generic_const_items",
8840        description: r##"# generic_const_items
8841
8842Allows generic parameters and where-clauses on free & associated const items.
8843
8844The tracking issue for this feature is: [#113521]
8845
8846[#113521]: https://github.com/rust-lang/rust/issues/113521
8847
8848------------------------
8849
8850Warning: This feature is an [experiment] and lacks an RFC.
8851There are no guarantees that it will ever be stabilized.
8852
8853See also: [generic_const_exprs], [min_generic_const_args].
8854
8855[experiment]: https://lang-team.rust-lang.org/how_to/experiment.html
8856[generic_const_exprs]: generic-const-exprs.md
8857[min_generic_const_args]: min-generic-const-args.md
8858
8859## Examples
8860
8861### Generic constant values
8862
8863```rust
8864#![allow(incomplete_features)]
8865#![feature(generic_const_items)]
8866
8867const GENERIC_VAL<const ARG: usize>: usize = ARG + 1;
8868
8869#[test]
8870fn generic_const_arg() {
8871    assert_eq!(GENERIC_VAL::<1>, 2);
8872    assert_eq!(GENERIC_VAL::<2>, 3);
8873}
8874```
8875
8876### Conditional constants
8877
8878```rust
8879#![allow(incomplete_features)]
8880#![feature(generic_const_items)]
8881
8882// `GENERIC_VAL::<0>` will fail to compile
8883const GENERIC_VAL<const ARG: usize>: usize = if ARG > 0 { ARG + 1 } else { panic!("0 value") };
8884
8885// Will fail to compile if the `Copy` derive is removed.
8886const COPY_MARKER<C: Copy>: () = ();
8887
8888#[derive(Clone, Copy)]
8889struct Foo;
8890
8891const FOO_IS_COPY: () = COPY_MARKER::<Foo>;
8892```
8893"##,
8894        default_severity: Severity::Allow,
8895        warn_since: None,
8896        deny_since: None,
8897    },
8898    Lint {
8899        label: "generic_const_parameter_types",
8900        description: r##"# `generic_const_parameter_types`
8901
8902Allows the type of const generics to depend on generic parameters
8903
8904The tracking issue for this feature is: [#137626]
8905
8906[#137626]: https://github.com/rust-lang/rust/issues/137626
8907
8908------------------------
8909"##,
8910        default_severity: Severity::Allow,
8911        warn_since: None,
8912        deny_since: None,
8913    },
8914    Lint {
8915        label: "generic_pattern_types",
8916        description: r##"# `generic_pattern_types`
8917
8918Allows any generic constants being used as pattern type range ends
8919
8920The tracking issue for this feature is: [#136574]
8921
8922[#136574]: https://github.com/rust-lang/rust/issues/136574
8923
8924------------------------
8925"##,
8926        default_severity: Severity::Allow,
8927        warn_since: None,
8928        deny_since: None,
8929    },
8930    Lint {
8931        label: "get_disjoint_mut_helpers",
8932        description: r##"# `get_disjoint_mut_helpers`
8933
8934
8935
8936This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
8937
8938------------------------
8939"##,
8940        default_severity: Severity::Allow,
8941        warn_since: None,
8942        deny_since: None,
8943    },
8944    Lint {
8945        label: "get_mut_unchecked",
8946        description: r##"# `get_mut_unchecked`
8947
8948
8949
8950The tracking issue for this feature is: [#63292]
8951
8952[#63292]: https://github.com/rust-lang/rust/issues/63292
8953
8954------------------------
8955"##,
8956        default_severity: Severity::Allow,
8957        warn_since: None,
8958        deny_since: None,
8959    },
8960    Lint {
8961        label: "gethostname",
8962        description: r##"# `gethostname`
8963
8964
8965
8966The tracking issue for this feature is: [#135142]
8967
8968[#135142]: https://github.com/rust-lang/rust/issues/135142
8969
8970------------------------
8971"##,
8972        default_severity: Severity::Allow,
8973        warn_since: None,
8974        deny_since: None,
8975    },
8976    Lint {
8977        label: "global_registration",
8978        description: r##"# `global_registration`
8979
8980Allows registering static items globally, possibly across crates, to iterate over at runtime.
8981
8982The tracking issue for this feature is: [#125119]
8983
8984[#125119]: https://github.com/rust-lang/rust/issues/125119
8985
8986------------------------
8987"##,
8988        default_severity: Severity::Allow,
8989        warn_since: None,
8990        deny_since: None,
8991    },
8992    Lint {
8993        label: "gpu_intrinsics",
8994        description: r##"# `gpu_intrinsics`
8995
8996
8997
8998This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
8999
9000------------------------
9001"##,
9002        default_severity: Severity::Allow,
9003        warn_since: None,
9004        deny_since: None,
9005    },
9006    Lint {
9007        label: "gpu_launch_sized_workgroup_mem",
9008        description: r##"# `gpu_launch_sized_workgroup_mem`
9009
9010
9011
9012The tracking issue for this feature is: [#135513]
9013
9014[#135513]: https://github.com/rust-lang/rust/issues/135513
9015
9016------------------------
9017"##,
9018        default_severity: Severity::Allow,
9019        warn_since: None,
9020        deny_since: None,
9021    },
9022    Lint {
9023        label: "gpu_offload",
9024        description: r##"# `gpu_offload`
9025
9026
9027
9028The tracking issue for this feature is: [#131513]
9029
9030[#131513]: https://github.com/rust-lang/rust/issues/131513
9031
9032------------------------
9033"##,
9034        default_severity: Severity::Allow,
9035        warn_since: None,
9036        deny_since: None,
9037    },
9038    Lint {
9039        label: "guard_patterns",
9040        description: r##"# `guard_patterns`
9041
9042Allows using guards in patterns.
9043
9044The tracking issue for this feature is: [#129967]
9045
9046[#129967]: https://github.com/rust-lang/rust/issues/129967
9047
9048------------------------
9049"##,
9050        default_severity: Severity::Allow,
9051        warn_since: None,
9052        deny_since: None,
9053    },
9054    Lint {
9055        label: "half_open_range_patterns_in_slices",
9056        description: r##"# `half_open_range_patterns_in_slices`
9057
9058The tracking issue for this feature is: [#67264]
9059It is a future part of the `exclusive_range_pattern` feature,
9060tracked at [#37854].
9061
9062[#67264]: https://github.com/rust-lang/rust/issues/67264
9063[#37854]: https://github.com/rust-lang/rust/issues/37854
9064-----
9065
9066This feature allow using top-level half-open range patterns in slices.
9067
9068```rust
9069#![feature(half_open_range_patterns_in_slices)]
9070
9071fn main() {
9072    let xs = [13, 1, 5, 2, 3, 1, 21, 8];
9073    let [a @ 3.., b @ ..3, c @ 4..6, ..] = xs else { return; };
9074}
9075```
9076
9077Note that this feature is not required if the patterns are wrapped between parenthesis.
9078
9079```rust
9080fn main() {
9081    let xs = [13, 1];
9082    let [(a @ 3..), c] = xs else { return; };
9083}
9084```
9085"##,
9086        default_severity: Severity::Allow,
9087        warn_since: None,
9088        deny_since: None,
9089    },
9090    Lint {
9091        label: "hash_map_internals",
9092        description: r##"# `hash_map_internals`
9093
9094
9095
9096This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
9097
9098------------------------
9099"##,
9100        default_severity: Severity::Allow,
9101        warn_since: None,
9102        deny_since: None,
9103    },
9104    Lint {
9105        label: "hash_map_macro",
9106        description: r##"# `hash_map_macro`
9107
9108
9109
9110The tracking issue for this feature is: [#144032]
9111
9112[#144032]: https://github.com/rust-lang/rust/issues/144032
9113
9114------------------------
9115"##,
9116        default_severity: Severity::Allow,
9117        warn_since: None,
9118        deny_since: None,
9119    },
9120    Lint {
9121        label: "hash_set_entry",
9122        description: r##"# `hash_set_entry`
9123
9124
9125
9126The tracking issue for this feature is: [#60896]
9127
9128[#60896]: https://github.com/rust-lang/rust/issues/60896
9129
9130------------------------
9131"##,
9132        default_severity: Severity::Allow,
9133        warn_since: None,
9134        deny_since: None,
9135    },
9136    Lint {
9137        label: "hasher_prefixfree_extras",
9138        description: r##"# `hasher_prefixfree_extras`
9139
9140
9141
9142The tracking issue for this feature is: [#96762]
9143
9144[#96762]: https://github.com/rust-lang/rust/issues/96762
9145
9146------------------------
9147"##,
9148        default_severity: Severity::Allow,
9149        warn_since: None,
9150        deny_since: None,
9151    },
9152    Lint {
9153        label: "hashmap_internals",
9154        description: r##"# `hashmap_internals`
9155
9156
9157
9158This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
9159
9160------------------------
9161"##,
9162        default_severity: Severity::Allow,
9163        warn_since: None,
9164        deny_since: None,
9165    },
9166    Lint {
9167        label: "hexagon_target_feature",
9168        description: r##"# `hexagon_target_feature`
9169
9170Target features on hexagon.
9171
9172The tracking issue for this feature is: [#150250]
9173
9174[#150250]: https://github.com/rust-lang/rust/issues/150250
9175
9176------------------------
9177"##,
9178        default_severity: Severity::Allow,
9179        warn_since: None,
9180        deny_since: None,
9181    },
9182    Lint {
9183        label: "hint_must_use",
9184        description: r##"# `hint_must_use`
9185
9186
9187
9188The tracking issue for this feature is: [#94745]
9189
9190[#94745]: https://github.com/rust-lang/rust/issues/94745
9191
9192------------------------
9193"##,
9194        default_severity: Severity::Allow,
9195        warn_since: None,
9196        deny_since: None,
9197    },
9198    Lint {
9199        label: "hint_prefetch",
9200        description: r##"# `hint_prefetch`
9201
9202
9203
9204The tracking issue for this feature is: [#146941]
9205
9206[#146941]: https://github.com/rust-lang/rust/issues/146941
9207
9208------------------------
9209"##,
9210        default_severity: Severity::Allow,
9211        warn_since: None,
9212        deny_since: None,
9213    },
9214    Lint {
9215        label: "impl_restriction",
9216        description: r##"# `impl_restriction`
9217
9218Allows `impl(crate) trait Foo` restrictions.
9219
9220The tracking issue for this feature is: [#105077]
9221
9222[#105077]: https://github.com/rust-lang/rust/issues/105077
9223
9224------------------------
9225"##,
9226        default_severity: Severity::Allow,
9227        warn_since: None,
9228        deny_since: None,
9229    },
9230    Lint {
9231        label: "impl_trait_in_assoc_type",
9232        description: r##"# `impl_trait_in_assoc_type`
9233
9234Allows `impl Trait` to be used inside associated types (RFC 2515).
9235
9236The tracking issue for this feature is: [#63063]
9237
9238[#63063]: https://github.com/rust-lang/rust/issues/63063
9239
9240------------------------
9241"##,
9242        default_severity: Severity::Allow,
9243        warn_since: None,
9244        deny_since: None,
9245    },
9246    Lint {
9247        label: "impl_trait_in_bindings",
9248        description: r##"# `impl_trait_in_bindings`
9249
9250Allows `impl Trait` in bindings (`let`).
9251
9252The tracking issue for this feature is: [#63065]
9253
9254[#63065]: https://github.com/rust-lang/rust/issues/63065
9255
9256------------------------
9257"##,
9258        default_severity: Severity::Allow,
9259        warn_since: None,
9260        deny_since: None,
9261    },
9262    Lint {
9263        label: "impl_trait_in_fn_trait_return",
9264        description: r##"# `impl_trait_in_fn_trait_return`
9265
9266Allows `impl Trait` as output type in `Fn` traits in return position of functions.
9267
9268The tracking issue for this feature is: [#99697]
9269
9270[#99697]: https://github.com/rust-lang/rust/issues/99697
9271
9272------------------------
9273"##,
9274        default_severity: Severity::Allow,
9275        warn_since: None,
9276        deny_since: None,
9277    },
9278    Lint {
9279        label: "import_trait_associated_functions",
9280        description: r##"# import_trait_associated_functions
9281
9282The tracking issue for this feature is: [#134691]
9283
9284[#134691]: https://github.com/rust-lang/rust/issues/134691
9285
9286------------------------
9287
9288This feature allows importing associated functions and constants from traits and then using them like regular items.
9289
9290```rust
9291#![feature(import_trait_associated_functions)]
9292
9293use std::ops::Add::add;
9294
9295fn main() {
9296    let numbers = vec![1, 2, 3, 4, 5, 6];
9297    let sum = numbers.into_iter().reduce(add); // instead of `.reduce(Add:add)`
9298
9299    assert_eq!(sum, Some(21));
9300}
9301```
9302"##,
9303        default_severity: Severity::Allow,
9304        warn_since: None,
9305        deny_since: None,
9306    },
9307    Lint {
9308        label: "inherent_associated_types",
9309        description: r##"# `inherent_associated_types`
9310
9311Allows associated types in inherent impls.
9312
9313The tracking issue for this feature is: [#8995]
9314
9315[#8995]: https://github.com/rust-lang/rust/issues/8995
9316
9317------------------------
9318"##,
9319        default_severity: Severity::Allow,
9320        warn_since: None,
9321        deny_since: None,
9322    },
9323    Lint {
9324        label: "inplace_iteration",
9325        description: r##"# `inplace_iteration`
9326
9327
9328
9329This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
9330
9331------------------------
9332"##,
9333        default_severity: Severity::Allow,
9334        warn_since: None,
9335        deny_since: None,
9336    },
9337    Lint {
9338        label: "int_format_into",
9339        description: r##"# `int_format_into`
9340
9341
9342
9343The tracking issue for this feature is: [#138215]
9344
9345[#138215]: https://github.com/rust-lang/rust/issues/138215
9346
9347------------------------
9348"##,
9349        default_severity: Severity::Allow,
9350        warn_since: None,
9351        deny_since: None,
9352    },
9353    Lint {
9354        label: "int_from_ascii",
9355        description: r##"# `int_from_ascii`
9356
9357
9358
9359The tracking issue for this feature is: [#134821]
9360
9361[#134821]: https://github.com/rust-lang/rust/issues/134821
9362
9363------------------------
9364"##,
9365        default_severity: Severity::Allow,
9366        warn_since: None,
9367        deny_since: None,
9368    },
9369    Lint {
9370        label: "int_roundings",
9371        description: r##"# `int_roundings`
9372
9373
9374
9375The tracking issue for this feature is: [#88581]
9376
9377[#88581]: https://github.com/rust-lang/rust/issues/88581
9378
9379------------------------
9380"##,
9381        default_severity: Severity::Allow,
9382        warn_since: None,
9383        deny_since: None,
9384    },
9385    Lint {
9386        label: "integer_atomics",
9387        description: r##"# `integer_atomics`
9388
9389
9390
9391The tracking issue for this feature is: [#99069]
9392
9393[#99069]: https://github.com/rust-lang/rust/issues/99069
9394
9395------------------------
9396"##,
9397        default_severity: Severity::Allow,
9398        warn_since: None,
9399        deny_since: None,
9400    },
9401    Lint {
9402        label: "integer_cast_extras",
9403        description: r##"# `integer_cast_extras`
9404
9405
9406
9407The tracking issue for this feature is: [#154650]
9408
9409[#154650]: https://github.com/rust-lang/rust/issues/154650
9410
9411------------------------
9412"##,
9413        default_severity: Severity::Allow,
9414        warn_since: None,
9415        deny_since: None,
9416    },
9417    Lint {
9418        label: "integer_widen_truncate",
9419        description: r##"# `integer_widen_truncate`
9420
9421
9422
9423The tracking issue for this feature is: [#154330]
9424
9425[#154330]: https://github.com/rust-lang/rust/issues/154330
9426
9427------------------------
9428"##,
9429        default_severity: Severity::Allow,
9430        warn_since: None,
9431        deny_since: None,
9432    },
9433    Lint {
9434        label: "internal_output_capture",
9435        description: r##"# `internal_output_capture`
9436
9437This feature is internal to the Rust compiler and is not intended for general use.
9438
9439------------------------
9440"##,
9441        default_severity: Severity::Allow,
9442        warn_since: None,
9443        deny_since: None,
9444    },
9445    Lint {
9446        label: "intra_doc_pointers",
9447        description: r##"# `intra-doc-pointers`
9448
9449The tracking issue for this feature is: [#80896]
9450
9451[#80896]: https://github.com/rust-lang/rust/issues/80896
9452
9453------------------------
9454
9455Rustdoc does not currently allow disambiguating between `*const` and `*mut`, and
9456raw pointers in intra-doc links are unstable until it does.
9457
9458```rust
9459#![feature(intra_doc_pointers)]
9460//! [pointer::add]
9461```
9462"##,
9463        default_severity: Severity::Allow,
9464        warn_since: None,
9465        deny_since: None,
9466    },
9467    Lint {
9468        label: "intrinsics",
9469        description: r##"# `intrinsics`
9470
9471The tracking issue for this feature is: None.
9472
9473Intrinsics are rarely intended to be stable directly, but are usually
9474exported in some sort of stable manner. Prefer using the stable interfaces to
9475the intrinsic directly when you can.
9476
9477------------------------
9478
9479
9480## Intrinsics with fallback logic
9481
9482Many intrinsics can be written in pure rust, albeit inefficiently or without supporting
9483some features that only exist on some backends. Backends can simply not implement those
9484intrinsics without causing any code miscompilations or failures to compile.
9485All intrinsic fallback bodies are automatically made cross-crate inlineable (like `#[inline]`)
9486by the codegen backend, but not the MIR inliner.
9487
9488```rust
9489#![feature(intrinsics)]
9490#![allow(internal_features)]
9491
9492#[rustc_intrinsic]
9493const unsafe fn const_deallocate(_ptr: *mut u8, _size: usize, _align: usize) {}
9494```
9495
9496Since these are just regular functions, it is perfectly ok to create the intrinsic twice:
9497
9498```rust
9499#![feature(intrinsics)]
9500#![allow(internal_features)]
9501
9502#[rustc_intrinsic]
9503const unsafe fn const_deallocate(_ptr: *mut u8, _size: usize, _align: usize) {}
9504
9505mod foo {
9506    #[rustc_intrinsic]
9507    const unsafe fn const_deallocate(_ptr: *mut u8, _size: usize, _align: usize) {
9508        panic!("noisy const dealloc")
9509    }
9510}
9511
9512```
9513
9514The behaviour on backends that override the intrinsic is exactly the same. On other
9515backends, the intrinsic behaviour depends on which implementation is called, just like
9516with any regular function.
9517
9518## Intrinsics lowered to MIR instructions
9519
9520Various intrinsics have native MIR operations that they correspond to. Instead of requiring
9521backends to implement both the intrinsic and the MIR operation, the `lower_intrinsics` pass
9522will convert the calls to the MIR operation. Backends do not need to know about these intrinsics
9523at all. These intrinsics only make sense without a body, and can be declared as a `#[rustc_intrinsic]`.
9524The body is never used as the lowering pass implements support for all backends, so we never have to
9525use the fallback logic.
9526
9527## Intrinsics without fallback logic
9528
9529These must be implemented by all backends.
9530
9531### `#[rustc_intrinsic]` declarations
9532
9533These are written without a body:
9534```rust
9535#![feature(intrinsics)]
9536#![allow(internal_features)]
9537
9538#[rustc_intrinsic]
9539pub fn abort() -> !;
9540```
9541"##,
9542        default_severity: Severity::Allow,
9543        warn_since: None,
9544        deny_since: None,
9545    },
9546    Lint {
9547        label: "io_const_error",
9548        description: r##"# `io_const_error`
9549
9550
9551
9552The tracking issue for this feature is: [#133448]
9553
9554[#133448]: https://github.com/rust-lang/rust/issues/133448
9555
9556------------------------
9557"##,
9558        default_severity: Severity::Allow,
9559        warn_since: None,
9560        deny_since: None,
9561    },
9562    Lint {
9563        label: "io_const_error_internals",
9564        description: r##"# `io_const_error_internals`
9565
9566
9567
9568This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
9569
9570------------------------
9571"##,
9572        default_severity: Severity::Allow,
9573        warn_since: None,
9574        deny_since: None,
9575    },
9576    Lint {
9577        label: "io_error_inprogress",
9578        description: r##"# `io_error_inprogress`
9579
9580
9581
9582The tracking issue for this feature is: [#130840]
9583
9584[#130840]: https://github.com/rust-lang/rust/issues/130840
9585
9586------------------------
9587"##,
9588        default_severity: Severity::Allow,
9589        warn_since: None,
9590        deny_since: None,
9591    },
9592    Lint {
9593        label: "io_error_more",
9594        description: r##"# `io_error_more`
9595
9596
9597
9598The tracking issue for this feature is: [#86442]
9599
9600[#86442]: https://github.com/rust-lang/rust/issues/86442
9601
9602------------------------
9603"##,
9604        default_severity: Severity::Allow,
9605        warn_since: None,
9606        deny_since: None,
9607    },
9608    Lint {
9609        label: "io_error_uncategorized",
9610        description: r##"# `io_error_uncategorized`
9611
9612
9613
9614This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
9615
9616------------------------
9617"##,
9618        default_severity: Severity::Allow,
9619        warn_since: None,
9620        deny_since: None,
9621    },
9622    Lint {
9623        label: "io_slice_as_bytes",
9624        description: r##"# `io_slice_as_bytes`
9625
9626
9627
9628The tracking issue for this feature is: [#132818]
9629
9630[#132818]: https://github.com/rust-lang/rust/issues/132818
9631
9632------------------------
9633"##,
9634        default_severity: Severity::Allow,
9635        warn_since: None,
9636        deny_since: None,
9637    },
9638    Lint {
9639        label: "ip",
9640        description: r##"# `ip`
9641
9642
9643
9644The tracking issue for this feature is: [#27709]
9645
9646[#27709]: https://github.com/rust-lang/rust/issues/27709
9647
9648------------------------
9649"##,
9650        default_severity: Severity::Allow,
9651        warn_since: None,
9652        deny_since: None,
9653    },
9654    Lint {
9655        label: "ip_as_octets",
9656        description: r##"# `ip_as_octets`
9657
9658
9659
9660The tracking issue for this feature is: [#137259]
9661
9662[#137259]: https://github.com/rust-lang/rust/issues/137259
9663
9664------------------------
9665"##,
9666        default_severity: Severity::Allow,
9667        warn_since: None,
9668        deny_since: None,
9669    },
9670    Lint {
9671        label: "ip_multicast_reserved",
9672        description: r##"# `ip_multicast_reserved`
9673
9674
9675
9676This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
9677
9678------------------------
9679"##,
9680        default_severity: Severity::Allow,
9681        warn_since: None,
9682        deny_since: None,
9683    },
9684    Lint {
9685        label: "is_ascii_octdigit",
9686        description: r##"# `is_ascii_octdigit`
9687
9688
9689
9690The tracking issue for this feature is: [#101288]
9691
9692[#101288]: https://github.com/rust-lang/rust/issues/101288
9693
9694------------------------
9695"##,
9696        default_severity: Severity::Allow,
9697        warn_since: None,
9698        deny_since: None,
9699    },
9700    Lint {
9701        label: "is_loongarch_feature_detected",
9702        description: r##"# `is_loongarch_feature_detected`
9703
9704
9705
9706The tracking issue for this feature is: [#117425]
9707
9708[#117425]: https://github.com/rust-lang/rust/issues/117425
9709
9710------------------------
9711"##,
9712        default_severity: Severity::Allow,
9713        warn_since: None,
9714        deny_since: None,
9715    },
9716    Lint {
9717        label: "is_riscv_feature_detected",
9718        description: r##"# `is_riscv_feature_detected`
9719
9720
9721
9722The tracking issue for this feature is: [#111192]
9723
9724[#111192]: https://github.com/rust-lang/rust/issues/111192
9725
9726------------------------
9727"##,
9728        default_severity: Severity::Allow,
9729        warn_since: None,
9730        deny_since: None,
9731    },
9732    Lint {
9733        label: "iter_advance_by",
9734        description: r##"# `iter_advance_by`
9735
9736
9737
9738The tracking issue for this feature is: [#77404]
9739
9740[#77404]: https://github.com/rust-lang/rust/issues/77404
9741
9742------------------------
9743"##,
9744        default_severity: Severity::Allow,
9745        warn_since: None,
9746        deny_since: None,
9747    },
9748    Lint {
9749        label: "iter_array_chunks",
9750        description: r##"# `iter_array_chunks`
9751
9752
9753
9754The tracking issue for this feature is: [#100450]
9755
9756[#100450]: https://github.com/rust-lang/rust/issues/100450
9757
9758------------------------
9759"##,
9760        default_severity: Severity::Allow,
9761        warn_since: None,
9762        deny_since: None,
9763    },
9764    Lint {
9765        label: "iter_collect_into",
9766        description: r##"# `iter_collect_into`
9767
9768
9769
9770The tracking issue for this feature is: [#94780]
9771
9772[#94780]: https://github.com/rust-lang/rust/issues/94780
9773
9774------------------------
9775"##,
9776        default_severity: Severity::Allow,
9777        warn_since: None,
9778        deny_since: None,
9779    },
9780    Lint {
9781        label: "iter_from_coroutine",
9782        description: r##"# `iter_from_coroutine`
9783
9784
9785
9786The tracking issue for this feature is: [#43122]
9787
9788[#43122]: https://github.com/rust-lang/rust/issues/43122
9789
9790------------------------
9791"##,
9792        default_severity: Severity::Allow,
9793        warn_since: None,
9794        deny_since: None,
9795    },
9796    Lint {
9797        label: "iter_intersperse",
9798        description: r##"# `iter_intersperse`
9799
9800
9801
9802The tracking issue for this feature is: [#79524]
9803
9804[#79524]: https://github.com/rust-lang/rust/issues/79524
9805
9806------------------------
9807"##,
9808        default_severity: Severity::Allow,
9809        warn_since: None,
9810        deny_since: None,
9811    },
9812    Lint {
9813        label: "iter_is_partitioned",
9814        description: r##"# `iter_is_partitioned`
9815
9816
9817
9818The tracking issue for this feature is: [#62544]
9819
9820[#62544]: https://github.com/rust-lang/rust/issues/62544
9821
9822------------------------
9823"##,
9824        default_severity: Severity::Allow,
9825        warn_since: None,
9826        deny_since: None,
9827    },
9828    Lint {
9829        label: "iter_macro",
9830        description: r##"# `iter_macro`
9831
9832
9833
9834The tracking issue for this feature is: [#142269]
9835
9836[#142269]: https://github.com/rust-lang/rust/issues/142269
9837
9838------------------------
9839"##,
9840        default_severity: Severity::Allow,
9841        warn_since: None,
9842        deny_since: None,
9843    },
9844    Lint {
9845        label: "iter_map_windows",
9846        description: r##"# `iter_map_windows`
9847
9848
9849
9850The tracking issue for this feature is: [#87155]
9851
9852[#87155]: https://github.com/rust-lang/rust/issues/87155
9853
9854------------------------
9855"##,
9856        default_severity: Severity::Allow,
9857        warn_since: None,
9858        deny_since: None,
9859    },
9860    Lint {
9861        label: "iter_next_chunk",
9862        description: r##"# `iter_next_chunk`
9863
9864
9865
9866The tracking issue for this feature is: [#98326]
9867
9868[#98326]: https://github.com/rust-lang/rust/issues/98326
9869
9870------------------------
9871"##,
9872        default_severity: Severity::Allow,
9873        warn_since: None,
9874        deny_since: None,
9875    },
9876    Lint {
9877        label: "iter_order_by",
9878        description: r##"# `iter_order_by`
9879
9880
9881
9882The tracking issue for this feature is: [#64295]
9883
9884[#64295]: https://github.com/rust-lang/rust/issues/64295
9885
9886------------------------
9887"##,
9888        default_severity: Severity::Allow,
9889        warn_since: None,
9890        deny_since: None,
9891    },
9892    Lint {
9893        label: "iter_partition_in_place",
9894        description: r##"# `iter_partition_in_place`
9895
9896
9897
9898The tracking issue for this feature is: [#62543]
9899
9900[#62543]: https://github.com/rust-lang/rust/issues/62543
9901
9902------------------------
9903"##,
9904        default_severity: Severity::Allow,
9905        warn_since: None,
9906        deny_since: None,
9907    },
9908    Lint {
9909        label: "iterator_try_collect",
9910        description: r##"# `iterator_try_collect`
9911
9912
9913
9914The tracking issue for this feature is: [#94047]
9915
9916[#94047]: https://github.com/rust-lang/rust/issues/94047
9917
9918------------------------
9919"##,
9920        default_severity: Severity::Allow,
9921        warn_since: None,
9922        deny_since: None,
9923    },
9924    Lint {
9925        label: "iterator_try_reduce",
9926        description: r##"# `iterator_try_reduce`
9927
9928
9929
9930The tracking issue for this feature is: [#87053]
9931
9932[#87053]: https://github.com/rust-lang/rust/issues/87053
9933
9934------------------------
9935"##,
9936        default_severity: Severity::Allow,
9937        warn_since: None,
9938        deny_since: None,
9939    },
9940    Lint {
9941        label: "junction_point",
9942        description: r##"# `junction_point`
9943
9944
9945
9946The tracking issue for this feature is: [#121709]
9947
9948[#121709]: https://github.com/rust-lang/rust/issues/121709
9949
9950------------------------
9951"##,
9952        default_severity: Severity::Allow,
9953        warn_since: None,
9954        deny_since: None,
9955    },
9956    Lint {
9957        label: "lahfsahf_target_feature",
9958        description: r##"# `lahfsahf_target_feature`
9959
9960lahfsahf target feature on x86.
9961
9962The tracking issue for this feature is: [#150251]
9963
9964[#150251]: https://github.com/rust-lang/rust/issues/150251
9965
9966------------------------
9967"##,
9968        default_severity: Severity::Allow,
9969        warn_since: None,
9970        deny_since: None,
9971    },
9972    Lint {
9973        label: "lang_items",
9974        description: r##"# `lang_items`
9975
9976The tracking issue for this feature is: None.
9977
9978------------------------
9979
9980The `rustc` compiler has certain pluggable operations, that is,
9981functionality that isn't hard-coded into the language, but is
9982implemented in libraries, with a special marker to tell the compiler
9983it exists. The marker is the attribute `#[lang = "..."]` and there are
9984various different values of `...`, i.e. various different 'lang
9985items'. Most of them can only be defined once.
9986
9987Lang items are loaded lazily by the compiler; e.g. if one never uses `Box`
9988then there is no need to define a function for `exchange_malloc`.
9989`rustc` will emit an error when an item is needed but not found in the current
9990crate or any that it depends on.
9991
9992Some features provided by lang items:
9993
9994- overloadable operators via traits: the traits corresponding to the
9995  `==`, `<`, dereferencing (`*`) and `+` (etc.) operators are all
9996  marked with lang items; those specific four are `eq`, `partial_ord`,
9997  `deref`/`deref_mut`, and `add` respectively.
9998- panicking: the `panic` and `panic_impl` lang items, among others.
9999- stack unwinding: the lang item `eh_personality` is a function used by the
10000  failure mechanisms of the compiler. This is often mapped to GCC's personality
10001  function (see the [`std` implementation][personality] for more information),
10002  but programs which don't trigger a panic can be assured that this function is
10003  never called.
10004- the traits in `core::marker` used to indicate types of
10005  various kinds; e.g. lang items `sized`, `sync` and `copy`.
10006- memory allocation, see below.
10007
10008Most lang items are defined by `core`, but if you're trying to build
10009an executable without the `std` crate, you might run into the need
10010for lang item definitions.
10011
10012[personality]: https://github.com/rust-lang/rust/blob/HEAD/library/std/src/sys/personality/gcc.rs
10013
10014## Example: Implementing a `Box`
10015
10016`Box` pointers require two lang items: one for the type itself and one for
10017allocation. A freestanding program that uses the `Box` sugar for dynamic
10018allocations via `malloc` and `free`:
10019
10020```rust,ignore (libc-is-finicky)
10021#![feature(lang_items, core_intrinsics, rustc_private, panic_unwind, rustc_attrs)]
10022#![allow(internal_features)]
10023#![no_std]
10024#![no_main]
10025
10026extern crate libc;
10027extern crate unwind;
10028
10029use core::ffi::{c_int, c_void};
10030use core::intrinsics;
10031use core::panic::PanicInfo;
10032use core::ptr::NonNull;
10033
10034pub struct Global; // the global allocator
10035struct Unique<T>(NonNull<T>);
10036
10037#[lang = "owned_box"]
10038pub struct Box<T, A = Global>(Unique<T>, A);
10039
10040impl<T> Box<T> {
10041    pub fn new(x: T) -> Self {
10042        #[rustc_box]
10043        Box::new(x)
10044    }
10045}
10046
10047impl<T, A> Drop for Box<T, A> {
10048    fn drop(&mut self) {
10049        unsafe {
10050            libc::free(self.0.0.as_ptr() as *mut c_void);
10051        }
10052    }
10053}
10054
10055#[lang = "exchange_malloc"]
10056unsafe fn allocate(size: usize, _align: usize) -> *mut u8 {
10057    let p = libc::malloc(size) as *mut u8;
10058
10059    // Check if `malloc` failed:
10060    if p.is_null() {
10061        intrinsics::abort();
10062    }
10063
10064    p
10065}
10066
10067#[no_mangle]
10068extern "C" fn main(_argc: c_int, _argv: *const *const u8) -> c_int {
10069    let _x = Box::new(1);
10070
10071    0
10072}
10073
10074#[lang = "eh_personality"]
10075fn rust_eh_personality() {}
10076
10077#[panic_handler]
10078fn panic_handler(_info: &PanicInfo) -> ! { intrinsics::abort() }
10079```
10080
10081Note the use of `abort`: the `exchange_malloc` lang item is assumed to
10082return a valid pointer, and so needs to do the check internally.
10083
10084## List of all language items
10085
10086An up-to-date list of all language items can be found [here] in the compiler code.
10087
10088[here]: https://github.com/rust-lang/rust/blob/HEAD/compiler/rustc_hir/src/lang_items.rs
10089"##,
10090        default_severity: Severity::Allow,
10091        warn_since: None,
10092        deny_since: None,
10093    },
10094    Lint {
10095        label: "large_assignments",
10096        description: r##"# `large_assignments`
10097
10098Allows setting the threshold for the `large_assignments` lint.
10099
10100The tracking issue for this feature is: [#83518]
10101
10102[#83518]: https://github.com/rust-lang/rust/issues/83518
10103
10104------------------------
10105"##,
10106        default_severity: Severity::Allow,
10107        warn_since: None,
10108        deny_since: None,
10109    },
10110    Lint {
10111        label: "layout_for_ptr",
10112        description: r##"# `layout_for_ptr`
10113
10114
10115
10116The tracking issue for this feature is: [#69835]
10117
10118[#69835]: https://github.com/rust-lang/rust/issues/69835
10119
10120------------------------
10121"##,
10122        default_severity: Severity::Allow,
10123        warn_since: None,
10124        deny_since: None,
10125    },
10126    Lint {
10127        label: "lazy_cell_into_inner",
10128        description: r##"# `lazy_cell_into_inner`
10129
10130
10131
10132The tracking issue for this feature is: [#125623]
10133
10134[#125623]: https://github.com/rust-lang/rust/issues/125623
10135
10136------------------------
10137"##,
10138        default_severity: Severity::Allow,
10139        warn_since: None,
10140        deny_since: None,
10141    },
10142    Lint {
10143        label: "lazy_type_alias",
10144        description: r##"# `lazy_type_alias`
10145
10146Allow to have type alias types for inter-crate use.
10147
10148The tracking issue for this feature is: [#112792]
10149
10150[#112792]: https://github.com/rust-lang/rust/issues/112792
10151
10152------------------------
10153"##,
10154        default_severity: Severity::Allow,
10155        warn_since: None,
10156        deny_since: None,
10157    },
10158    Lint {
10159        label: "legacy_receiver_trait",
10160        description: r##"# `legacy_receiver_trait`
10161
10162
10163
10164This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
10165
10166------------------------
10167"##,
10168        default_severity: Severity::Allow,
10169        warn_since: None,
10170        deny_since: None,
10171    },
10172    Lint {
10173        label: "liballoc_internals",
10174        description: r##"# `liballoc_internals`
10175
10176
10177
10178This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
10179
10180------------------------
10181"##,
10182        default_severity: Severity::Allow,
10183        warn_since: None,
10184        deny_since: None,
10185    },
10186    Lint {
10187        label: "libstd_sys_internals",
10188        description: r##"# `libstd_sys_internals`
10189
10190This feature is internal to the Rust compiler and is not intended for general use.
10191
10192------------------------
10193"##,
10194        default_severity: Severity::Allow,
10195        warn_since: None,
10196        deny_since: None,
10197    },
10198    Lint {
10199        label: "likely_unlikely",
10200        description: r##"# `likely_unlikely`
10201
10202
10203
10204The tracking issue for this feature is: [#151619]
10205
10206[#151619]: https://github.com/rust-lang/rust/issues/151619
10207
10208------------------------
10209"##,
10210        default_severity: Severity::Allow,
10211        warn_since: None,
10212        deny_since: None,
10213    },
10214    Lint {
10215        label: "link_arg_attribute",
10216        description: r##"# `link_arg_attribute`
10217
10218The tracking issue for this feature is: [#99427]
10219
10220------
10221
10222The `link_arg_attribute` feature allows passing arguments into the linker
10223from inside of the source code. Order is preserved for link attributes as
10224they were defined on a single extern block:
10225
10226```rust,no_run
10227#![feature(link_arg_attribute)]
10228
10229#[link(kind = "link-arg", name = "--start-group")]
10230#[link(kind = "static", name = "c")]
10231#[link(kind = "static", name = "gcc")]
10232#[link(kind = "link-arg", name = "--end-group")]
10233extern "C" {}
10234```
10235
10236[#99427]: https://github.com/rust-lang/rust/issues/99427
10237"##,
10238        default_severity: Severity::Allow,
10239        warn_since: None,
10240        deny_since: None,
10241    },
10242    Lint {
10243        label: "link_cfg",
10244        description: r##"# `link_cfg`
10245
10246This feature is internal to the Rust compiler and is not intended for general use.
10247
10248------------------------
10249"##,
10250        default_severity: Severity::Allow,
10251        warn_since: None,
10252        deny_since: None,
10253    },
10254    Lint {
10255        label: "link_llvm_intrinsics",
10256        description: r##"# `link_llvm_intrinsics`
10257
10258Allows using `#[link_name="llvm.*"]`.
10259
10260The tracking issue for this feature is: [#29602]
10261
10262[#29602]: https://github.com/rust-lang/rust/issues/29602
10263
10264------------------------
10265"##,
10266        default_severity: Severity::Allow,
10267        warn_since: None,
10268        deny_since: None,
10269    },
10270    Lint {
10271        label: "linkage",
10272        description: r##"# `linkage`
10273
10274Allows using the `#[linkage = ".."]` attribute.
10275
10276The tracking issue for this feature is: [#29603]
10277
10278[#29603]: https://github.com/rust-lang/rust/issues/29603
10279
10280------------------------
10281"##,
10282        default_severity: Severity::Allow,
10283        warn_since: None,
10284        deny_since: None,
10285    },
10286    Lint {
10287        label: "linked_list_cursors",
10288        description: r##"# `linked_list_cursors`
10289
10290
10291
10292The tracking issue for this feature is: [#58533]
10293
10294[#58533]: https://github.com/rust-lang/rust/issues/58533
10295
10296------------------------
10297"##,
10298        default_severity: Severity::Allow,
10299        warn_since: None,
10300        deny_since: None,
10301    },
10302    Lint {
10303        label: "linked_list_remove",
10304        description: r##"# `linked_list_remove`
10305
10306
10307
10308The tracking issue for this feature is: [#69210]
10309
10310[#69210]: https://github.com/rust-lang/rust/issues/69210
10311
10312------------------------
10313"##,
10314        default_severity: Severity::Allow,
10315        warn_since: None,
10316        deny_since: None,
10317    },
10318    Lint {
10319        label: "linked_list_retain",
10320        description: r##"# `linked_list_retain`
10321
10322
10323
10324The tracking issue for this feature is: [#114135]
10325
10326[#114135]: https://github.com/rust-lang/rust/issues/114135
10327
10328------------------------
10329"##,
10330        default_severity: Severity::Allow,
10331        warn_since: None,
10332        deny_since: None,
10333    },
10334    Lint {
10335        label: "linux_pidfd",
10336        description: r##"# `linux_pidfd`
10337
10338
10339
10340The tracking issue for this feature is: [#82971]
10341
10342[#82971]: https://github.com/rust-lang/rust/issues/82971
10343
10344------------------------
10345"##,
10346        default_severity: Severity::Allow,
10347        warn_since: None,
10348        deny_since: None,
10349    },
10350    Lint {
10351        label: "local_key_cell_update",
10352        description: r##"# `local_key_cell_update`
10353
10354
10355
10356The tracking issue for this feature is: [#143989]
10357
10358[#143989]: https://github.com/rust-lang/rust/issues/143989
10359
10360------------------------
10361"##,
10362        default_severity: Severity::Allow,
10363        warn_since: None,
10364        deny_since: None,
10365    },
10366    Lint {
10367        label: "local_waker",
10368        description: r##"# `local_waker`
10369
10370
10371
10372The tracking issue for this feature is: [#118959]
10373
10374[#118959]: https://github.com/rust-lang/rust/issues/118959
10375
10376------------------------
10377"##,
10378        default_severity: Severity::Allow,
10379        warn_since: None,
10380        deny_since: None,
10381    },
10382    Lint {
10383        label: "lock_value_accessors",
10384        description: r##"# `lock_value_accessors`
10385
10386
10387
10388The tracking issue for this feature is: [#133407]
10389
10390[#133407]: https://github.com/rust-lang/rust/issues/133407
10391
10392------------------------
10393"##,
10394        default_severity: Severity::Allow,
10395        warn_since: None,
10396        deny_since: None,
10397    },
10398    Lint {
10399        label: "log_syntax",
10400        description: r##"# `log_syntax`
10401
10402
10403
10404The tracking issue for this feature is: [#29598]
10405
10406[#29598]: https://github.com/rust-lang/rust/issues/29598
10407
10408------------------------
10409"##,
10410        default_severity: Severity::Allow,
10411        warn_since: None,
10412        deny_since: None,
10413    },
10414    Lint {
10415        label: "loongarch_target_feature",
10416        description: r##"# `loongarch_target_feature`
10417
10418Target features on loongarch.
10419
10420The tracking issue for this feature is: [#150252]
10421
10422[#150252]: https://github.com/rust-lang/rust/issues/150252
10423
10424------------------------
10425"##,
10426        default_severity: Severity::Allow,
10427        warn_since: None,
10428        deny_since: None,
10429    },
10430    Lint {
10431        label: "loop_match",
10432        description: r##"# `loop_match`
10433
10434The tracking issue for this feature is: [#132306]
10435
10436[#132306]: https://github.com/rust-lang/rust/issues/132306
10437
10438------
10439
10440The `#[loop_match]` and `#[const_continue]` attributes can be used to improve the code
10441generation of logic that fits this shape:
10442
10443```ignore (pseudo-rust)
10444loop {
10445    state = 'blk: {
10446        match state {
10447            State::A => {
10448                break 'blk State::B
10449            }
10450            State::B => { /* ... */ }
10451            /* ... */
10452        }
10453    }
10454}
10455```
10456
10457Here the loop itself can be annotated with `#[loop_match]`, and any `break 'blk` with
10458`#[const_continue]` if the value is know at compile time:
10459
10460```ignore (pseudo-rust)
10461#[loop_match]
10462loop {
10463    state = 'blk: {
10464        match state {
10465            State::A => {
10466                #[const_continue]
10467                break 'blk State::B
10468            }
10469            State::B => { /* ... */ }
10470            /* ... */
10471        }
10472    }
10473}
10474```
10475
10476The observable behavior of this loop is exactly the same as without the extra attributes.
10477The difference is in the generated output: normally, when the state is `A`, control flow
10478moves from the `A` branch, back to the top of the loop, then to the `B` branch. With the
10479attributes, The `A` branch will immediately jump to the `B` branch.
10480
10481Removing the indirection can be beneficial for stack usage and branch prediction, and
10482enables other optimizations by clearly splitting out the control flow paths that your
10483program will actually use.
10484"##,
10485        default_severity: Severity::Allow,
10486        warn_since: None,
10487        deny_since: None,
10488    },
10489    Lint {
10490        label: "m68k_target_feature",
10491        description: r##"# `m68k_target_feature`
10492
10493Target features on m68k.
10494
10495The tracking issue for this feature is: [#134328]
10496
10497[#134328]: https://github.com/rust-lang/rust/issues/134328
10498
10499------------------------
10500"##,
10501        default_severity: Severity::Allow,
10502        warn_since: None,
10503        deny_since: None,
10504    },
10505    Lint {
10506        label: "macro_attr",
10507        description: r##"# `macro_attr`
10508
10509Allow `macro_rules!` attribute rules
10510
10511The tracking issue for this feature is: [#143547]
10512
10513[#143547]: https://github.com/rust-lang/rust/issues/143547
10514
10515------------------------
10516"##,
10517        default_severity: Severity::Allow,
10518        warn_since: None,
10519        deny_since: None,
10520    },
10521    Lint {
10522        label: "macro_derive",
10523        description: r##"# `macro_derive`
10524
10525Allow `macro_rules!` derive rules
10526
10527The tracking issue for this feature is: [#143549]
10528
10529[#143549]: https://github.com/rust-lang/rust/issues/143549
10530
10531------------------------
10532"##,
10533        default_severity: Severity::Allow,
10534        warn_since: None,
10535        deny_since: None,
10536    },
10537    Lint {
10538        label: "macro_guard_matcher",
10539        description: r##"# `macro_guard_matcher`
10540
10541Allow `$x:guard` matcher in macros
10542
10543The tracking issue for this feature is: [#153104]
10544
10545[#153104]: https://github.com/rust-lang/rust/issues/153104
10546
10547------------------------
10548"##,
10549        default_severity: Severity::Allow,
10550        warn_since: None,
10551        deny_since: None,
10552    },
10553    Lint {
10554        label: "macro_metavar_expr",
10555        description: r##"# `macro_metavar_expr`
10556
10557The tracking issue for this feature is: [#83527]
10558
10559------------------------
10560
10561> This feature is not to be confused with [`macro_metavar_expr_concat`].
10562
10563[`macro_metavar_expr_concat`]: ./macro-metavar-expr-concat.md
10564[#83527]: https://github.com/rust-lang/rust/issues/83527
10565"##,
10566        default_severity: Severity::Allow,
10567        warn_since: None,
10568        deny_since: None,
10569    },
10570    Lint {
10571        label: "macro_metavar_expr_concat",
10572        description: r##"# `macro_metavar_expr_concat`
10573
10574The tracking issue for this feature is: [#124225]
10575
10576------------------------
10577
10578In 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`].
10579 `#![feature(macro_metavar_expr_concat)]` introduces a way to do this, using the concat metavariable expression.
10580
10581> This feature uses the syntax from [`macro_metavar_expr`] but is otherwise
10582> independent. It replaces the since-removed unstable feature
10583> [`concat_idents`].
10584
10585> This is an experimental feature; it and its syntax will require a RFC before stabilization.
10586
10587
10588### Overview
10589
10590`#![feature(macro_metavar_expr_concat)]` provides the `concat` metavariable expression for creating new identifiers:
10591
10592```rust
10593#![feature(macro_metavar_expr_concat)]
10594
10595macro_rules! create_some_structs {
10596    ($name:ident) => {
10597        pub struct ${ concat(First, $name) };
10598        pub struct ${ concat(Second, $name) };
10599        pub struct ${ concat(Third, $name) };
10600    }
10601}
10602
10603create_some_structs!(Thing);
10604```
10605
10606This macro invocation expands to:
10607
10608```rust
10609pub struct FirstThing;
10610pub struct SecondThing;
10611pub struct ThirdThing;
10612```
10613
10614### Syntax
10615
10616This feature builds upon the metavariable expression syntax `${ .. }` as specified in [RFC 3086] ([`macro_metavar_expr`]).
10617 `concat` is available like `${ concat(items) }`, where `items` is a comma separated sequence of idents and/or literals.
10618
10619### Examples
10620
10621#### Create a function or method with a concatenated name
10622
10623```rust
10624#![feature(macro_metavar_expr_concat)]
10625
10626macro_rules! make_getter {
10627    ($name:ident, $field: ident, $ret:ty) => {
10628        impl $name {
10629            pub fn ${ concat(get_, $field) }(&self) -> &$ret {
10630                &self.$field
10631            }
10632        }
10633    }
10634}
10635
10636pub struct Thing {
10637    description: String,
10638}
10639
10640make_getter!(Thing, description, String);
10641```
10642
10643This expands to:
10644
10645```rust
10646pub struct Thing {
10647    description: String,
10648}
10649
10650impl Thing {
10651    pub fn get_description(&self) -> &String {
10652        &self.description
10653    }
10654}
10655```
10656
10657#### Create names for macro generated tests
10658
10659```rust
10660#![feature(macro_metavar_expr_concat)]
10661
10662macro_rules! test_math {
10663    ($integer:ident) => {
10664        #[test]
10665        fn ${ concat(test_, $integer, _, addition) } () {
10666            let a: $integer = 73;
10667            let b: $integer = 42;
10668            assert_eq!(a + b, 115)
10669        }
10670
10671        #[test]
10672        fn ${ concat(test_, $integer, _, subtraction) } () {
10673            let a: $integer = 73;
10674            let b: $integer = 42;
10675            assert_eq!(a - b, 31)
10676        }
10677    }
10678}
10679
10680test_math!(i32);
10681test_math!(u64);
10682test_math!(u128);
10683```
10684
10685Running this returns the following output:
10686
10687```text
10688running 6 tests
10689test test_i32_subtraction ... ok
10690test test_i32_addition ... ok
10691test test_u128_addition ... ok
10692test test_u128_subtraction ... ok
10693test test_u64_addition ... ok
10694test test_u64_subtraction ... ok
10695
10696test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
10697```
10698
10699[`paste`]: https://crates.io/crates/paste
10700[RFC 3086]: https://rust-lang.github.io/rfcs/3086-macro-metavar-expr.html
10701[`macro_metavar_expr`]: ../language-features/macro-metavar-expr.md
10702[`concat_idents`]: https://github.com/rust-lang/rust/issues/29599
10703[#124225]: https://github.com/rust-lang/rust/issues/124225
10704[declarative macros]: https://doc.rust-lang.org/stable/reference/macros-by-example.html
10705"##,
10706        default_severity: Severity::Allow,
10707        warn_since: None,
10708        deny_since: None,
10709    },
10710    Lint {
10711        label: "map_try_insert",
10712        description: r##"# `map_try_insert`
10713
10714
10715
10716The tracking issue for this feature is: [#82766]
10717
10718[#82766]: https://github.com/rust-lang/rust/issues/82766
10719
10720------------------------
10721"##,
10722        default_severity: Severity::Allow,
10723        warn_since: None,
10724        deny_since: None,
10725    },
10726    Lint {
10727        label: "mapped_lock_guards",
10728        description: r##"# `mapped_lock_guards`
10729
10730
10731
10732The tracking issue for this feature is: [#117108]
10733
10734[#117108]: https://github.com/rust-lang/rust/issues/117108
10735
10736------------------------
10737"##,
10738        default_severity: Severity::Allow,
10739        warn_since: None,
10740        deny_since: None,
10741    },
10742    Lint {
10743        label: "marker_trait_attr",
10744        description: r##"# `marker_trait_attr`
10745
10746The tracking issue for this feature is: [#29864]
10747
10748[#29864]: https://github.com/rust-lang/rust/issues/29864
10749
10750------------------------
10751
10752Normally, Rust keeps you from adding trait implementations that could
10753overlap with each other, as it would be ambiguous which to use.  This
10754feature, however, carves out an exception to that rule: a trait can
10755opt-in to having overlapping implementations, at the cost that those
10756implementations are not allowed to override anything (and thus the
10757trait itself cannot have any associated items, as they're pointless
10758when they'd need to do the same thing for every type anyway).
10759
10760```rust
10761#![feature(marker_trait_attr)]
10762
10763#[marker] trait CheapToClone: Clone {}
10764
10765impl<T: Copy> CheapToClone for T {}
10766
10767// These could potentially overlap with the blanket implementation above,
10768// so are only allowed because CheapToClone is a marker trait.
10769impl<T: CheapToClone, U: CheapToClone> CheapToClone for (T, U) {}
10770impl<T: CheapToClone> CheapToClone for std::ops::Range<T> {}
10771
10772fn cheap_clone<T: CheapToClone>(t: T) -> T {
10773    t.clone()
10774}
10775```
10776
10777This is expected to replace the unstable `overlapping_marker_traits`
10778feature, which applied to all empty traits (without needing an opt-in).
10779"##,
10780        default_severity: Severity::Allow,
10781        warn_since: None,
10782        deny_since: None,
10783    },
10784    Lint {
10785        label: "maybe_dangling",
10786        description: r##"# `maybe_dangling`
10787
10788
10789
10790The tracking issue for this feature is: [#118166]
10791
10792[#118166]: https://github.com/rust-lang/rust/issues/118166
10793
10794------------------------
10795"##,
10796        default_severity: Severity::Allow,
10797        warn_since: None,
10798        deny_since: None,
10799    },
10800    Lint {
10801        label: "maybe_uninit_array_assume_init",
10802        description: r##"# `maybe_uninit_array_assume_init`
10803
10804
10805
10806The tracking issue for this feature is: [#96097]
10807
10808[#96097]: https://github.com/rust-lang/rust/issues/96097
10809
10810------------------------
10811"##,
10812        default_severity: Severity::Allow,
10813        warn_since: None,
10814        deny_since: None,
10815    },
10816    Lint {
10817        label: "maybe_uninit_as_bytes",
10818        description: r##"# `maybe_uninit_as_bytes`
10819
10820
10821
10822The tracking issue for this feature is: [#93092]
10823
10824[#93092]: https://github.com/rust-lang/rust/issues/93092
10825
10826------------------------
10827"##,
10828        default_severity: Severity::Allow,
10829        warn_since: None,
10830        deny_since: None,
10831    },
10832    Lint {
10833        label: "maybe_uninit_fill",
10834        description: r##"# `maybe_uninit_fill`
10835
10836
10837
10838The tracking issue for this feature is: [#117428]
10839
10840[#117428]: https://github.com/rust-lang/rust/issues/117428
10841
10842------------------------
10843"##,
10844        default_severity: Severity::Allow,
10845        warn_since: None,
10846        deny_since: None,
10847    },
10848    Lint {
10849        label: "maybe_uninit_uninit_array_transpose",
10850        description: r##"# `maybe_uninit_uninit_array_transpose`
10851
10852
10853
10854The tracking issue for this feature is: [#96097]
10855
10856[#96097]: https://github.com/rust-lang/rust/issues/96097
10857
10858------------------------
10859"##,
10860        default_severity: Severity::Allow,
10861        warn_since: None,
10862        deny_since: None,
10863    },
10864    Lint {
10865        label: "mem_conjure_zst",
10866        description: r##"# `mem_conjure_zst`
10867
10868
10869
10870The tracking issue for this feature is: [#95383]
10871
10872[#95383]: https://github.com/rust-lang/rust/issues/95383
10873
10874------------------------
10875"##,
10876        default_severity: Severity::Allow,
10877        warn_since: None,
10878        deny_since: None,
10879    },
10880    Lint {
10881        label: "mem_copy_fn",
10882        description: r##"# `mem_copy_fn`
10883
10884
10885
10886The tracking issue for this feature is: [#98262]
10887
10888[#98262]: https://github.com/rust-lang/rust/issues/98262
10889
10890------------------------
10891"##,
10892        default_severity: Severity::Allow,
10893        warn_since: None,
10894        deny_since: None,
10895    },
10896    Lint {
10897        label: "mgca_type_const_syntax",
10898        description: r##"# `mgca_type_const_syntax`
10899
10900Enable mgca `type const` syntax before expansion.
10901
10902The tracking issue for this feature is: [#132980]
10903
10904[#132980]: https://github.com/rust-lang/rust/issues/132980
10905
10906------------------------
10907"##,
10908        default_severity: Severity::Allow,
10909        warn_since: None,
10910        deny_since: None,
10911    },
10912    Lint {
10913        label: "min_adt_const_params",
10914        description: r##"# `min_adt_const_params`
10915
10916Allows 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.
10917
10918The tracking issue for this feature is: [#154042]
10919
10920[#154042]: https://github.com/rust-lang/rust/issues/154042
10921
10922------------------------
10923"##,
10924        default_severity: Severity::Allow,
10925        warn_since: None,
10926        deny_since: None,
10927    },
10928    Lint {
10929        label: "min_generic_const_args",
10930        description: r##"# min_generic_const_args
10931
10932Enables the generic const args MVP (paths to type const items and constructors for ADTs and primitives).
10933
10934The tracking issue for this feature is: [#132980]
10935
10936[#132980]: https://github.com/rust-lang/rust/issues/132980
10937
10938------------------------
10939
10940Warning: This feature is incomplete; its design and syntax may change.
10941
10942This feature acts as a minimal alternative to [generic_const_exprs] that allows a smaller subset of functionality,
10943and uses a different approach for implementation. It is intentionally more restrictive, which helps with avoiding edge
10944cases that make the `generic_const_exprs` hard to implement properly. See [Feature background][feature_background]
10945for more details.
10946
10947Related features: [generic_const_args], [generic_const_items].
10948
10949[feature_background]: https://github.com/rust-lang/project-const-generics/blob/main/documents/min_const_generics_plan.md
10950[generic_const_exprs]: generic-const-exprs.md
10951[generic_const_args]: generic-const-args.md
10952[generic_const_items]: generic-const-items.md
10953
10954## `type const` syntax
10955
10956This feature introduces new syntax: `type const`.
10957Constants marked as `type const` are allowed to be used in type contexts, e.g.:
10958
10959```compile_fail
10960#![allow(incomplete_features)]
10961#![feature(min_generic_const_args)]
10962
10963type const X: usize = 1;
10964const Y: usize = 1;
10965
10966struct Foo {
10967    good_arr: [(); X], // Allowed
10968    bad_arr: [(); Y], // Will not compile, `Y` must be `type const`.
10969}
10970```
10971
10972## Examples
10973
10974```rust
10975#![allow(incomplete_features)]
10976#![feature(min_generic_const_args)]
10977
10978trait Bar {
10979    type const VAL: usize;
10980    type const VAL2: usize;
10981}
10982
10983struct Baz;
10984
10985impl Bar for Baz {
10986    type const VAL: usize = 2;
10987    type const VAL2: usize = const { Self::VAL * 2 };
10988}
10989
10990struct Foo<B: Bar> {
10991    arr1: [usize; B::VAL],
10992    arr2: [usize; B::VAL2],
10993}
10994```
10995
10996Note that with [generic_const_exprs] the same example would look as follows:
10997
10998```rust
10999#![allow(incomplete_features)]
11000#![feature(generic_const_exprs)]
11001
11002trait Bar {
11003    const VAL: usize;
11004    const VAL2: usize;
11005}
11006
11007struct Baz;
11008
11009impl Bar for Baz {
11010    const VAL: usize = 2;
11011    const VAL2: usize = const { Self::VAL * 2 };
11012}
11013
11014struct Foo<B: Bar>
11015where
11016    [(); B::VAL]:,
11017    [(); B::VAL2]:,
11018{
11019    arr1: [usize; B::VAL],
11020    arr2: [usize; B::VAL2],
11021}
11022```
11023
11024Use of const functions is allowed:
11025
11026```rust
11027#![allow(incomplete_features)]
11028#![feature(min_generic_const_args)]
11029
11030const VAL: usize = 1;
11031
11032const fn inc(val: usize) -> usize {
11033    val + 1
11034}
11035
11036type const INC: usize = const { inc(VAL) };
11037
11038const ARR: [usize; INC] = [0; INC];
11039```
11040"##,
11041        default_severity: Severity::Allow,
11042        warn_since: None,
11043        deny_since: None,
11044    },
11045    Lint {
11046        label: "min_specialization",
11047        description: r##"# `min_specialization`
11048
11049A minimal, sound subset of specialization intended to be used by the standard library until the soundness issues with specialization are fixed.
11050
11051The tracking issue for this feature is: [#31844]
11052
11053[#31844]: https://github.com/rust-lang/rust/issues/31844
11054
11055------------------------
11056"##,
11057        default_severity: Severity::Allow,
11058        warn_since: None,
11059        deny_since: None,
11060    },
11061    Lint {
11062        label: "mips_target_feature",
11063        description: r##"# `mips_target_feature`
11064
11065Target features on mips.
11066
11067The tracking issue for this feature is: [#150253]
11068
11069[#150253]: https://github.com/rust-lang/rust/issues/150253
11070
11071------------------------
11072"##,
11073        default_severity: Severity::Allow,
11074        warn_since: None,
11075        deny_since: None,
11076    },
11077    Lint {
11078        label: "more_float_constants",
11079        description: r##"# `more_float_constants`
11080
11081
11082
11083The tracking issue for this feature is: [#146939]
11084
11085[#146939]: https://github.com/rust-lang/rust/issues/146939
11086
11087------------------------
11088"##,
11089        default_severity: Severity::Allow,
11090        warn_since: None,
11091        deny_since: None,
11092    },
11093    Lint {
11094        label: "more_maybe_bounds",
11095        description: r##"# `more_maybe_bounds`
11096
11097Allows using `?Trait` trait bounds in more contexts.
11098
11099This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
11100
11101------------------------
11102"##,
11103        default_severity: Severity::Allow,
11104        warn_since: None,
11105        deny_since: None,
11106    },
11107    Lint {
11108        label: "more_qualified_paths",
11109        description: r##"# `more_qualified_paths`
11110
11111The `more_qualified_paths` feature can be used in order to enable the
11112use of qualified paths in patterns.
11113
11114The tracking issue for this feature is: [#86935](https://github.com/rust-lang/rust/issues/86935).
11115
11116------------------------
11117
11118## Example
11119
11120```rust
11121#![feature(more_qualified_paths)]
11122
11123fn main() {
11124    // destructure through a qualified path
11125    let <Foo as A>::Assoc { br } = StructStruct { br: 2 };
11126}
11127
11128struct StructStruct {
11129    br: i8,
11130}
11131
11132struct Foo;
11133
11134trait A {
11135    type Assoc;
11136}
11137
11138impl A for Foo {
11139    type Assoc = StructStruct;
11140}
11141```
11142"##,
11143        default_severity: Severity::Allow,
11144        warn_since: None,
11145        deny_since: None,
11146    },
11147    Lint {
11148        label: "motor_ext",
11149        description: r##"# `motor_ext`
11150
11151
11152
11153The tracking issue for this feature is: [#147456]
11154
11155[#147456]: https://github.com/rust-lang/rust/issues/147456
11156
11157------------------------
11158"##,
11159        default_severity: Severity::Allow,
11160        warn_since: None,
11161        deny_since: None,
11162    },
11163    Lint {
11164        label: "move_expr",
11165        description: r##"# `move_expr`
11166
11167Allows `move(expr)` in closures.
11168
11169The tracking issue for this feature is: [#155050]
11170
11171[#155050]: https://github.com/rust-lang/rust/issues/155050
11172
11173------------------------
11174"##,
11175        default_severity: Severity::Allow,
11176        warn_since: None,
11177        deny_since: None,
11178    },
11179    Lint {
11180        label: "movrs_target_feature",
11181        description: r##"# `movrs_target_feature`
11182
11183The `movrs` target feature on x86.
11184
11185The tracking issue for this feature is: [#137976]
11186
11187[#137976]: https://github.com/rust-lang/rust/issues/137976
11188
11189------------------------
11190"##,
11191        default_severity: Severity::Allow,
11192        warn_since: None,
11193        deny_since: None,
11194    },
11195    Lint {
11196        label: "mpmc_channel",
11197        description: r##"# `mpmc_channel`
11198
11199
11200
11201The tracking issue for this feature is: [#126840]
11202
11203[#126840]: https://github.com/rust-lang/rust/issues/126840
11204
11205------------------------
11206"##,
11207        default_severity: Severity::Allow,
11208        warn_since: None,
11209        deny_since: None,
11210    },
11211    Lint {
11212        label: "mpsc_is_disconnected",
11213        description: r##"# `mpsc_is_disconnected`
11214
11215
11216
11217The tracking issue for this feature is: [#153668]
11218
11219[#153668]: https://github.com/rust-lang/rust/issues/153668
11220
11221------------------------
11222"##,
11223        default_severity: Severity::Allow,
11224        warn_since: None,
11225        deny_since: None,
11226    },
11227    Lint {
11228        label: "multiple_supertrait_upcastable",
11229        description: r##"# `multiple_supertrait_upcastable`
11230
11231Allows the `multiple_supertrait_upcastable` lint.
11232
11233The tracking issue for this feature is: [#150833]
11234
11235[#150833]: https://github.com/rust-lang/rust/issues/150833
11236
11237------------------------
11238"##,
11239        default_severity: Severity::Allow,
11240        warn_since: None,
11241        deny_since: None,
11242    },
11243    Lint {
11244        label: "must_not_suspend",
11245        description: r##"# `must_not_suspend`
11246
11247Allows the `#[must_not_suspend]` attribute.
11248
11249The tracking issue for this feature is: [#83310]
11250
11251[#83310]: https://github.com/rust-lang/rust/issues/83310
11252
11253------------------------
11254"##,
11255        default_severity: Severity::Allow,
11256        warn_since: None,
11257        deny_since: None,
11258    },
11259    Lint {
11260        label: "mut_ref",
11261        description: r##"# `mut_ref`
11262
11263Allows `mut ref` and `mut ref mut` identifier patterns.
11264
11265The tracking issue for this feature is: [#123076]
11266
11267[#123076]: https://github.com/rust-lang/rust/issues/123076
11268
11269------------------------
11270"##,
11271        default_severity: Severity::Allow,
11272        warn_since: None,
11273        deny_since: None,
11274    },
11275    Lint {
11276        label: "mut_restriction",
11277        description: r##"# `mut_restriction`
11278
11279Allows `mut(crate) field: Type` restrictions.
11280
11281The tracking issue for this feature is: [#105077]
11282
11283[#105077]: https://github.com/rust-lang/rust/issues/105077
11284
11285------------------------
11286"##,
11287        default_severity: Severity::Allow,
11288        warn_since: None,
11289        deny_since: None,
11290    },
11291    Lint {
11292        label: "mutex_data_ptr",
11293        description: r##"# `mutex_data_ptr`
11294
11295
11296
11297The tracking issue for this feature is: [#140368]
11298
11299[#140368]: https://github.com/rust-lang/rust/issues/140368
11300
11301------------------------
11302"##,
11303        default_severity: Severity::Allow,
11304        warn_since: None,
11305        deny_since: None,
11306    },
11307    Lint {
11308        label: "naked_functions_rustic_abi",
11309        description: r##"# `naked_functions_rustic_abi`
11310
11311Allows using `#[naked]` on `extern "Rust"` functions.
11312
11313The tracking issue for this feature is: [#138997]
11314
11315[#138997]: https://github.com/rust-lang/rust/issues/138997
11316
11317------------------------
11318"##,
11319        default_severity: Severity::Allow,
11320        warn_since: None,
11321        deny_since: None,
11322    },
11323    Lint {
11324        label: "naked_functions_target_feature",
11325        description: r##"# `naked_functions_target_feature`
11326
11327Allows using `#[target_feature(enable = "...")]` on `#[naked]` on functions.
11328
11329The tracking issue for this feature is: [#138568]
11330
11331[#138568]: https://github.com/rust-lang/rust/issues/138568
11332
11333------------------------
11334"##,
11335        default_severity: Severity::Allow,
11336        warn_since: None,
11337        deny_since: None,
11338    },
11339    Lint {
11340        label: "native_link_modifiers_as_needed",
11341        description: r##"# `native_link_modifiers_as_needed`
11342
11343The tracking issue for this feature is: [#81490]
11344
11345[#81490]: https://github.com/rust-lang/rust/issues/81490
11346
11347------------------------
11348
11349The `native_link_modifiers_as_needed` feature allows you to use the `as-needed` modifier.
11350
11351`as-needed` is only compatible with the `dynamic` and `framework` linking kinds. Using any other kind will result in a compiler error.
11352
11353`+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.
11354
11355This modifier translates to `--as-needed` for ld-like linkers, and to `-dead_strip_dylibs` / `-needed_library` / `-needed_framework` for ld64.
11356The modifier does nothing for linkers that don't support it (e.g. `link.exe`).
11357
11358The 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.
11359"##,
11360        default_severity: Severity::Allow,
11361        warn_since: None,
11362        deny_since: None,
11363    },
11364    Lint {
11365        label: "needs_panic_runtime",
11366        description: r##"# `needs_panic_runtime`
11367
11368Allows declaring with `#![needs_panic_runtime]` that a panic runtime is needed.
11369
11370The tracking issue for this feature is: [#32837]
11371
11372[#32837]: https://github.com/rust-lang/rust/issues/32837
11373
11374------------------------
11375"##,
11376        default_severity: Severity::Allow,
11377        warn_since: None,
11378        deny_since: None,
11379    },
11380    Lint {
11381        label: "negative_bounds",
11382        description: r##"# `negative_bounds`
11383
11384Allow negative trait bounds. This is an internal-only feature for testing the trait solver!
11385
11386This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
11387
11388------------------------
11389"##,
11390        default_severity: Severity::Allow,
11391        warn_since: None,
11392        deny_since: None,
11393    },
11394    Lint {
11395        label: "negative_impls",
11396        description: r##"# `negative_impls`
11397
11398The tracking issue for this feature is [#68318].
11399
11400[#68318]: https://github.com/rust-lang/rust/issues/68318
11401
11402----
11403
11404With the feature gate `negative_impls`, you can write negative impls as well as positive ones:
11405
11406```rust
11407#![feature(negative_impls)]
11408trait DerefMut { }
11409impl<T: ?Sized> !DerefMut for &T { }
11410```
11411
11412Negative 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.
11413
11414Negative impls have the following characteristics:
11415
11416* They do not have any items.
11417* They must obey the orphan rules as if they were a positive impl.
11418* They cannot "overlap" with any positive impls.
11419
11420## Semver interaction
11421
11422It is a breaking change to remove a negative impl. Negative impls are a commitment not to implement the given trait for the named types.
11423
11424## Orphan and overlap rules
11425
11426Negative 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.
11427
11428Similarly, 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.)
11429
11430## Interaction with auto traits
11431
11432Declaring a negative impl `impl !SomeAutoTrait for SomeType` for an
11433auto-trait serves two purposes:
11434
11435* as with any trait, it declares that `SomeType` will never implement `SomeAutoTrait`;
11436* it disables the automatic `SomeType: SomeAutoTrait` impl that would otherwise have been generated.
11437
11438Note that, at present, there is no way to indicate that a given type
11439does not implement an auto trait *but that it may do so in the
11440future*. For ordinary types, this is done by simply not declaring any
11441impl at all, but that is not an option for auto traits. A workaround
11442is that one could embed a marker type as one of the fields, where the
11443marker type is `!AutoTrait`.
11444
11445## Immediate uses
11446
11447Negative 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).
11448
11449This serves two purposes:
11450
11451* For proving the correctness of unsafe code, we can use that impl as evidence that no `DerefMut` or `Clone` impl exists.
11452* It prevents downstream crates from creating such impls.
11453"##,
11454        default_severity: Severity::Allow,
11455        warn_since: None,
11456        deny_since: None,
11457    },
11458    Lint {
11459        label: "never_patterns",
11460        description: r##"# `never_patterns`
11461
11462Allows the `!` pattern.
11463
11464The tracking issue for this feature is: [#118155]
11465
11466[#118155]: https://github.com/rust-lang/rust/issues/118155
11467
11468------------------------
11469"##,
11470        default_severity: Severity::Allow,
11471        warn_since: None,
11472        deny_since: None,
11473    },
11474    Lint {
11475        label: "never_type",
11476        description: r##"# `never_type`
11477
11478Allows the `!` type. Does not imply 'exhaustive_patterns' (below) any more.
11479
11480The tracking issue for this feature is: [#35121]
11481
11482[#35121]: https://github.com/rust-lang/rust/issues/35121
11483
11484------------------------
11485"##,
11486        default_severity: Severity::Allow,
11487        warn_since: None,
11488        deny_since: None,
11489    },
11490    Lint {
11491        label: "new_range",
11492        description: r##"# `new_range`
11493
11494The tracking issue for this feature is: [#123741]
11495
11496[#123741]: https://github.com/rust-lang/rust/issues/123741
11497
11498---
11499
11500Switch the syntaxes `a..`, `a..b`, and `a..=b` to resolve the new range types.
11501"##,
11502        default_severity: Severity::Allow,
11503        warn_since: None,
11504        deny_since: None,
11505    },
11506    Lint {
11507        label: "new_range_api_legacy",
11508        description: r##"# `new_range_api_legacy`
11509
11510
11511
11512The tracking issue for this feature is: [#125687]
11513
11514[#125687]: https://github.com/rust-lang/rust/issues/125687
11515
11516------------------------
11517"##,
11518        default_severity: Severity::Allow,
11519        warn_since: None,
11520        deny_since: None,
11521    },
11522    Lint {
11523        label: "new_range_remainder",
11524        description: r##"# `new_range_remainder`
11525
11526
11527
11528The tracking issue for this feature is: [#154458]
11529
11530[#154458]: https://github.com/rust-lang/rust/issues/154458
11531
11532------------------------
11533"##,
11534        default_severity: Severity::Allow,
11535        warn_since: None,
11536        deny_since: None,
11537    },
11538    Lint {
11539        label: "next_index",
11540        description: r##"# `next_index`
11541
11542
11543
11544The tracking issue for this feature is: [#130711]
11545
11546[#130711]: https://github.com/rust-lang/rust/issues/130711
11547
11548------------------------
11549"##,
11550        default_severity: Severity::Allow,
11551        warn_since: None,
11552        deny_since: None,
11553    },
11554    Lint {
11555        label: "no_core",
11556        description: r##"# `no_core`
11557
11558Allows `#![no_core]`.
11559
11560The tracking issue for this feature is: [#29639]
11561
11562[#29639]: https://github.com/rust-lang/rust/issues/29639
11563
11564------------------------
11565"##,
11566        default_severity: Severity::Allow,
11567        warn_since: None,
11568        deny_since: None,
11569    },
11570    Lint {
11571        label: "non_exhaustive_omitted_patterns_lint",
11572        description: r##"# `non_exhaustive_omitted_patterns_lint`
11573
11574Allows using the `non_exhaustive_omitted_patterns` lint.
11575
11576The tracking issue for this feature is: [#89554]
11577
11578[#89554]: https://github.com/rust-lang/rust/issues/89554
11579
11580------------------------
11581"##,
11582        default_severity: Severity::Allow,
11583        warn_since: None,
11584        deny_since: None,
11585    },
11586    Lint {
11587        label: "non_lifetime_binders",
11588        description: r##"# `non_lifetime_binders`
11589
11590Allows `for<T>` binders in where-clauses
11591
11592The tracking issue for this feature is: [#108185]
11593
11594[#108185]: https://github.com/rust-lang/rust/issues/108185
11595
11596------------------------
11597"##,
11598        default_severity: Severity::Allow,
11599        warn_since: None,
11600        deny_since: None,
11601    },
11602    Lint {
11603        label: "nonpoison_condvar",
11604        description: r##"# `nonpoison_condvar`
11605
11606
11607
11608The tracking issue for this feature is: [#134645]
11609
11610[#134645]: https://github.com/rust-lang/rust/issues/134645
11611
11612------------------------
11613"##,
11614        default_severity: Severity::Allow,
11615        warn_since: None,
11616        deny_since: None,
11617    },
11618    Lint {
11619        label: "nonpoison_mutex",
11620        description: r##"# `nonpoison_mutex`
11621
11622
11623
11624The tracking issue for this feature is: [#134645]
11625
11626[#134645]: https://github.com/rust-lang/rust/issues/134645
11627
11628------------------------
11629"##,
11630        default_severity: Severity::Allow,
11631        warn_since: None,
11632        deny_since: None,
11633    },
11634    Lint {
11635        label: "nonpoison_rwlock",
11636        description: r##"# `nonpoison_rwlock`
11637
11638
11639
11640The tracking issue for this feature is: [#134645]
11641
11642[#134645]: https://github.com/rust-lang/rust/issues/134645
11643
11644------------------------
11645"##,
11646        default_severity: Severity::Allow,
11647        warn_since: None,
11648        deny_since: None,
11649    },
11650    Lint {
11651        label: "nonzero_bitwise",
11652        description: r##"# `nonzero_bitwise`
11653
11654
11655
11656The tracking issue for this feature is: [#128281]
11657
11658[#128281]: https://github.com/rust-lang/rust/issues/128281
11659
11660------------------------
11661"##,
11662        default_severity: Severity::Allow,
11663        warn_since: None,
11664        deny_since: None,
11665    },
11666    Lint {
11667        label: "nonzero_from_mut",
11668        description: r##"# `nonzero_from_mut`
11669
11670
11671
11672The tracking issue for this feature is: [#106290]
11673
11674[#106290]: https://github.com/rust-lang/rust/issues/106290
11675
11676------------------------
11677"##,
11678        default_severity: Severity::Allow,
11679        warn_since: None,
11680        deny_since: None,
11681    },
11682    Lint {
11683        label: "nonzero_from_str_radix",
11684        description: r##"# `nonzero_from_str_radix`
11685
11686
11687
11688The tracking issue for this feature is: [#152193]
11689
11690[#152193]: https://github.com/rust-lang/rust/issues/152193
11691
11692------------------------
11693"##,
11694        default_severity: Severity::Allow,
11695        warn_since: None,
11696        deny_since: None,
11697    },
11698    Lint {
11699        label: "nonzero_internals",
11700        description: r##"# `nonzero_internals`
11701
11702
11703
11704This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
11705
11706------------------------
11707"##,
11708        default_severity: Severity::Allow,
11709        warn_since: None,
11710        deny_since: None,
11711    },
11712    Lint {
11713        label: "nonzero_ops",
11714        description: r##"# `nonzero_ops`
11715
11716
11717
11718The tracking issue for this feature is: [#84186]
11719
11720[#84186]: https://github.com/rust-lang/rust/issues/84186
11721
11722------------------------
11723"##,
11724        default_severity: Severity::Allow,
11725        warn_since: None,
11726        deny_since: None,
11727    },
11728    Lint {
11729        label: "normalize_lexically",
11730        description: r##"# `normalize_lexically`
11731
11732
11733
11734The tracking issue for this feature is: [#134694]
11735
11736[#134694]: https://github.com/rust-lang/rust/issues/134694
11737
11738------------------------
11739"##,
11740        default_severity: Severity::Allow,
11741        warn_since: None,
11742        deny_since: None,
11743    },
11744    Lint {
11745        label: "num_internals",
11746        description: r##"# `num_internals`
11747
11748
11749
11750This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
11751
11752------------------------
11753"##,
11754        default_severity: Severity::Allow,
11755        warn_since: None,
11756        deny_since: None,
11757    },
11758    Lint {
11759        label: "numfmt",
11760        description: r##"# `numfmt`
11761
11762
11763
11764This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
11765
11766------------------------
11767"##,
11768        default_severity: Severity::Allow,
11769        warn_since: None,
11770        deny_since: None,
11771    },
11772    Lint {
11773        label: "nvptx_target_feature",
11774        description: r##"# `nvptx_target_feature`
11775
11776Target feaures on nvptx.
11777
11778The tracking issue for this feature is: [#150254]
11779
11780[#150254]: https://github.com/rust-lang/rust/issues/150254
11781
11782------------------------
11783"##,
11784        default_severity: Severity::Allow,
11785        warn_since: None,
11786        deny_since: None,
11787    },
11788    Lint {
11789        label: "objc_class_variant",
11790        description: r##"# `objc_class_variant`
11791
11792
11793
11794This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
11795
11796------------------------
11797"##,
11798        default_severity: Severity::Allow,
11799        warn_since: None,
11800        deny_since: None,
11801    },
11802    Lint {
11803        label: "objc_selector_variant",
11804        description: r##"# `objc_selector_variant`
11805
11806
11807
11808This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
11809
11810------------------------
11811"##,
11812        default_severity: Severity::Allow,
11813        warn_since: None,
11814        deny_since: None,
11815    },
11816    Lint {
11817        label: "offset_of_enum",
11818        description: r##"# `offset_of_enum`
11819
11820The tracking issue for this feature is: [#120141]
11821
11822[#120141]: https://github.com/rust-lang/rust/issues/120141
11823
11824------------------------
11825
11826When the `offset_of_enum` feature is enabled, the [`offset_of!`] macro may be used to obtain the
11827offsets of fields of `enum`s; to express this, `enum` variants may be traversed as if they were
11828fields. Variants themselves do not have an offset, so they cannot appear as the last path component.
11829
11830```rust
11831#![feature(offset_of_enum)]
11832use std::mem;
11833
11834#[repr(u8)]
11835enum Enum {
11836    A(u8, u16),
11837    B { one: u8, two: u16 },
11838}
11839
11840assert_eq!(mem::offset_of!(Enum, A.0), 1);
11841assert_eq!(mem::offset_of!(Enum, B.two), 2);
11842
11843assert_eq!(mem::offset_of!(Option<&u8>, Some.0), 0);
11844```
11845
11846[`offset_of!`]: ../../std/mem/macro.offset_of.html
11847"##,
11848        default_severity: Severity::Allow,
11849        warn_since: None,
11850        deny_since: None,
11851    },
11852    Lint {
11853        label: "offset_of_slice",
11854        description: r##"# `offset_of_slice`
11855
11856The tracking issue for this feature is: [#126151]
11857
11858[#126151]: https://github.com/rust-lang/rust/issues/126151
11859
11860------------------------
11861
11862When the `offset_of_slice` feature is enabled, the [`offset_of!`] macro may be used to determine
11863the offset of fields whose type is `[T]`, that is, a slice of dynamic size.
11864
11865In general, fields whose type is dynamically sized do not have statically known offsets because
11866they do not have statically known alignments. However, `[T]` has the same alignment as `T`, so
11867it specifically may be allowed.
11868
11869```rust
11870#![feature(offset_of_slice)]
11871
11872#[repr(C)]
11873pub struct Struct {
11874    head: u32,
11875    tail: [u8],
11876}
11877
11878fn main() {
11879    assert_eq!(std::mem::offset_of!(Struct, tail), 4);
11880}
11881```
11882
11883[`offset_of!`]: ../../std/mem/macro.offset_of.html
11884"##,
11885        default_severity: Severity::Allow,
11886        warn_since: None,
11887        deny_since: None,
11888    },
11889    Lint {
11890        label: "once_cell_get_mut",
11891        description: r##"# `once_cell_get_mut`
11892
11893
11894
11895The tracking issue for this feature is: [#121641]
11896
11897[#121641]: https://github.com/rust-lang/rust/issues/121641
11898
11899------------------------
11900"##,
11901        default_severity: Severity::Allow,
11902        warn_since: None,
11903        deny_since: None,
11904    },
11905    Lint {
11906        label: "once_cell_try",
11907        description: r##"# `once_cell_try`
11908
11909
11910
11911The tracking issue for this feature is: [#109737]
11912
11913[#109737]: https://github.com/rust-lang/rust/issues/109737
11914
11915------------------------
11916"##,
11917        default_severity: Severity::Allow,
11918        warn_since: None,
11919        deny_since: None,
11920    },
11921    Lint {
11922        label: "once_cell_try_insert",
11923        description: r##"# `once_cell_try_insert`
11924
11925
11926
11927The tracking issue for this feature is: [#116693]
11928
11929[#116693]: https://github.com/rust-lang/rust/issues/116693
11930
11931------------------------
11932"##,
11933        default_severity: Severity::Allow,
11934        warn_since: None,
11935        deny_since: None,
11936    },
11937    Lint {
11938        label: "one_sided_range",
11939        description: r##"# `one_sided_range`
11940
11941
11942
11943The tracking issue for this feature is: [#69780]
11944
11945[#69780]: https://github.com/rust-lang/rust/issues/69780
11946
11947------------------------
11948"##,
11949        default_severity: Severity::Allow,
11950        warn_since: None,
11951        deny_since: None,
11952    },
11953    Lint {
11954        label: "oneshot_channel",
11955        description: r##"# `oneshot_channel`
11956
11957
11958
11959The tracking issue for this feature is: [#143674]
11960
11961[#143674]: https://github.com/rust-lang/rust/issues/143674
11962
11963------------------------
11964"##,
11965        default_severity: Severity::Allow,
11966        warn_since: None,
11967        deny_since: None,
11968    },
11969    Lint {
11970        label: "optimize_attribute",
11971        description: r##"# `optimize_attribute`
11972
11973Allows using `#[optimize(X)]`.
11974
11975The tracking issue for this feature is: [#54882]
11976
11977[#54882]: https://github.com/rust-lang/rust/issues/54882
11978
11979------------------------
11980"##,
11981        default_severity: Severity::Allow,
11982        warn_since: None,
11983        deny_since: None,
11984    },
11985    Lint {
11986        label: "option_array_transpose",
11987        description: r##"# `option_array_transpose`
11988
11989
11990
11991The tracking issue for this feature is: [#130828]
11992
11993[#130828]: https://github.com/rust-lang/rust/issues/130828
11994
11995------------------------
11996"##,
11997        default_severity: Severity::Allow,
11998        warn_since: None,
11999        deny_since: None,
12000    },
12001    Lint {
12002        label: "option_get_or_try_insert_with",
12003        description: r##"# `option_get_or_try_insert_with`
12004
12005
12006
12007The tracking issue for this feature is: [#143648]
12008
12009[#143648]: https://github.com/rust-lang/rust/issues/143648
12010
12011------------------------
12012"##,
12013        default_severity: Severity::Allow,
12014        warn_since: None,
12015        deny_since: None,
12016    },
12017    Lint {
12018        label: "option_into_flat_iter",
12019        description: r##"# `option_into_flat_iter`
12020
12021
12022
12023The tracking issue for this feature is: [#148441]
12024
12025[#148441]: https://github.com/rust-lang/rust/issues/148441
12026
12027------------------------
12028"##,
12029        default_severity: Severity::Allow,
12030        warn_since: None,
12031        deny_since: None,
12032    },
12033    Lint {
12034        label: "option_reduce",
12035        description: r##"# `option_reduce`
12036
12037
12038
12039The tracking issue for this feature is: [#144273]
12040
12041[#144273]: https://github.com/rust-lang/rust/issues/144273
12042
12043------------------------
12044"##,
12045        default_severity: Severity::Allow,
12046        warn_since: None,
12047        deny_since: None,
12048    },
12049    Lint {
12050        label: "option_reference_flattening",
12051        description: r##"# `option_reference_flattening`
12052
12053
12054
12055The tracking issue for this feature is: [#149221]
12056
12057[#149221]: https://github.com/rust-lang/rust/issues/149221
12058
12059------------------------
12060"##,
12061        default_severity: Severity::Allow,
12062        warn_since: None,
12063        deny_since: None,
12064    },
12065    Lint {
12066        label: "option_zip",
12067        description: r##"# `option_zip`
12068
12069
12070
12071The tracking issue for this feature is: [#70086]
12072
12073[#70086]: https://github.com/rust-lang/rust/issues/70086
12074
12075------------------------
12076"##,
12077        default_severity: Severity::Allow,
12078        warn_since: None,
12079        deny_since: None,
12080    },
12081    Lint {
12082        label: "os_str_slice",
12083        description: r##"# `os_str_slice`
12084
12085
12086
12087The tracking issue for this feature is: [#118485]
12088
12089[#118485]: https://github.com/rust-lang/rust/issues/118485
12090
12091------------------------
12092"##,
12093        default_severity: Severity::Allow,
12094        warn_since: None,
12095        deny_since: None,
12096    },
12097    Lint {
12098        label: "os_str_split_at",
12099        description: r##"# `os_str_split_at`
12100
12101
12102
12103This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
12104
12105------------------------
12106"##,
12107        default_severity: Severity::Allow,
12108        warn_since: None,
12109        deny_since: None,
12110    },
12111    Lint {
12112        label: "os_string_truncate",
12113        description: r##"# `os_string_truncate`
12114
12115
12116
12117The tracking issue for this feature is: [#133262]
12118
12119[#133262]: https://github.com/rust-lang/rust/issues/133262
12120
12121------------------------
12122"##,
12123        default_severity: Severity::Allow,
12124        warn_since: None,
12125        deny_since: None,
12126    },
12127    Lint {
12128        label: "panic_abort",
12129        description: r##"# `panic_abort`
12130
12131
12132
12133The tracking issue for this feature is: [#32837]
12134
12135[#32837]: https://github.com/rust-lang/rust/issues/32837
12136
12137------------------------
12138"##,
12139        default_severity: Severity::Allow,
12140        warn_since: None,
12141        deny_since: None,
12142    },
12143    Lint {
12144        label: "panic_always_abort",
12145        description: r##"# `panic_always_abort`
12146
12147
12148
12149The tracking issue for this feature is: [#84438]
12150
12151[#84438]: https://github.com/rust-lang/rust/issues/84438
12152
12153------------------------
12154"##,
12155        default_severity: Severity::Allow,
12156        warn_since: None,
12157        deny_since: None,
12158    },
12159    Lint {
12160        label: "panic_backtrace_config",
12161        description: r##"# `panic_backtrace_config`
12162
12163
12164
12165The tracking issue for this feature is: [#93346]
12166
12167[#93346]: https://github.com/rust-lang/rust/issues/93346
12168
12169------------------------
12170"##,
12171        default_severity: Severity::Allow,
12172        warn_since: None,
12173        deny_since: None,
12174    },
12175    Lint {
12176        label: "panic_can_unwind",
12177        description: r##"# `panic_can_unwind`
12178
12179
12180
12181The tracking issue for this feature is: [#92988]
12182
12183[#92988]: https://github.com/rust-lang/rust/issues/92988
12184
12185------------------------
12186"##,
12187        default_severity: Severity::Allow,
12188        warn_since: None,
12189        deny_since: None,
12190    },
12191    Lint {
12192        label: "panic_internals",
12193        description: r##"# `panic_internals`
12194
12195
12196
12197This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
12198
12199------------------------
12200"##,
12201        default_severity: Severity::Allow,
12202        warn_since: None,
12203        deny_since: None,
12204    },
12205    Lint {
12206        label: "panic_runtime",
12207        description: r##"# `panic_runtime`
12208
12209Allows using the `#![panic_runtime]` attribute.
12210
12211The tracking issue for this feature is: [#32837]
12212
12213[#32837]: https://github.com/rust-lang/rust/issues/32837
12214
12215------------------------
12216"##,
12217        default_severity: Severity::Allow,
12218        warn_since: None,
12219        deny_since: None,
12220    },
12221    Lint {
12222        label: "panic_unwind",
12223        description: r##"# `panic_unwind`
12224
12225
12226
12227The tracking issue for this feature is: [#32837]
12228
12229[#32837]: https://github.com/rust-lang/rust/issues/32837
12230
12231------------------------
12232"##,
12233        default_severity: Severity::Allow,
12234        warn_since: None,
12235        deny_since: None,
12236    },
12237    Lint {
12238        label: "panic_update_hook",
12239        description: r##"# `panic_update_hook`
12240
12241
12242
12243The tracking issue for this feature is: [#92649]
12244
12245[#92649]: https://github.com/rust-lang/rust/issues/92649
12246
12247------------------------
12248"##,
12249        default_severity: Severity::Allow,
12250        warn_since: None,
12251        deny_since: None,
12252    },
12253    Lint {
12254        label: "partial_ord_chaining_methods",
12255        description: r##"# `partial_ord_chaining_methods`
12256
12257
12258
12259This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
12260
12261------------------------
12262"##,
12263        default_severity: Severity::Allow,
12264        warn_since: None,
12265        deny_since: None,
12266    },
12267    Lint {
12268        label: "patchable_function_entry",
12269        description: r##"# `patchable_function_entry`
12270
12271Allows specifying nop padding on functions for dynamic patching.
12272
12273The tracking issue for this feature is: [#123115]
12274
12275[#123115]: https://github.com/rust-lang/rust/issues/123115
12276
12277------------------------
12278"##,
12279        default_severity: Severity::Allow,
12280        warn_since: None,
12281        deny_since: None,
12282    },
12283    Lint {
12284        label: "path_absolute_method",
12285        description: r##"# `path_absolute_method`
12286
12287
12288
12289The tracking issue for this feature is: [#153328]
12290
12291[#153328]: https://github.com/rust-lang/rust/issues/153328
12292
12293------------------------
12294"##,
12295        default_severity: Severity::Allow,
12296        warn_since: None,
12297        deny_since: None,
12298    },
12299    Lint {
12300        label: "path_trailing_sep",
12301        description: r##"# `path_trailing_sep`
12302
12303
12304
12305The tracking issue for this feature is: [#142503]
12306
12307[#142503]: https://github.com/rust-lang/rust/issues/142503
12308
12309------------------------
12310"##,
12311        default_severity: Severity::Allow,
12312        warn_since: None,
12313        deny_since: None,
12314    },
12315    Lint {
12316        label: "pathbuf_into_string",
12317        description: r##"# `pathbuf_into_string`
12318
12319
12320
12321The tracking issue for this feature is: [#156203]
12322
12323[#156203]: https://github.com/rust-lang/rust/issues/156203
12324
12325------------------------
12326"##,
12327        default_severity: Severity::Allow,
12328        warn_since: None,
12329        deny_since: None,
12330    },
12331    Lint {
12332        label: "pattern",
12333        description: r##"# `pattern`
12334
12335
12336
12337The tracking issue for this feature is: [#27721]
12338
12339[#27721]: https://github.com/rust-lang/rust/issues/27721
12340
12341------------------------
12342"##,
12343        default_severity: Severity::Allow,
12344        warn_since: None,
12345        deny_since: None,
12346    },
12347    Lint {
12348        label: "pattern_complexity_limit",
12349        description: r##"# `pattern_complexity_limit`
12350
12351Set the maximum pattern complexity allowed (not limited by default).
12352
12353This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
12354
12355------------------------
12356"##,
12357        default_severity: Severity::Allow,
12358        warn_since: None,
12359        deny_since: None,
12360    },
12361    Lint {
12362        label: "pattern_type_macro",
12363        description: r##"# `pattern_type_macro`
12364
12365
12366
12367The tracking issue for this feature is: [#123646]
12368
12369[#123646]: https://github.com/rust-lang/rust/issues/123646
12370
12371------------------------
12372"##,
12373        default_severity: Severity::Allow,
12374        warn_since: None,
12375        deny_since: None,
12376    },
12377    Lint {
12378        label: "pattern_type_range_trait",
12379        description: r##"# `pattern_type_range_trait`
12380
12381
12382
12383The tracking issue for this feature is: [#123646]
12384
12385[#123646]: https://github.com/rust-lang/rust/issues/123646
12386
12387------------------------
12388"##,
12389        default_severity: Severity::Allow,
12390        warn_since: None,
12391        deny_since: None,
12392    },
12393    Lint {
12394        label: "pattern_types",
12395        description: r##"# `pattern_types`
12396
12397Allows using pattern types.
12398
12399The tracking issue for this feature is: [#123646]
12400
12401[#123646]: https://github.com/rust-lang/rust/issues/123646
12402
12403------------------------
12404"##,
12405        default_severity: Severity::Allow,
12406        warn_since: None,
12407        deny_since: None,
12408    },
12409    Lint {
12410        label: "peer_credentials_unix_socket",
12411        description: r##"# `peer_credentials_unix_socket`
12412
12413
12414
12415The tracking issue for this feature is: [#42839]
12416
12417[#42839]: https://github.com/rust-lang/rust/issues/42839
12418
12419------------------------
12420"##,
12421        default_severity: Severity::Allow,
12422        warn_since: None,
12423        deny_since: None,
12424    },
12425    Lint {
12426        label: "phantom_variance_markers",
12427        description: r##"# `phantom_variance_markers`
12428
12429
12430
12431The tracking issue for this feature is: [#135806]
12432
12433[#135806]: https://github.com/rust-lang/rust/issues/135806
12434
12435------------------------
12436"##,
12437        default_severity: Severity::Allow,
12438        warn_since: None,
12439        deny_since: None,
12440    },
12441    Lint {
12442        label: "pin_coerce_unsized_trait",
12443        description: r##"# `pin_coerce_unsized_trait`
12444
12445
12446
12447The tracking issue for this feature is: [#150112]
12448
12449[#150112]: https://github.com/rust-lang/rust/issues/150112
12450
12451------------------------
12452"##,
12453        default_severity: Severity::Allow,
12454        warn_since: None,
12455        deny_since: None,
12456    },
12457    Lint {
12458        label: "pin_derefmut_internals",
12459        description: r##"# `pin_derefmut_internals`
12460
12461
12462
12463This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
12464
12465------------------------
12466"##,
12467        default_severity: Severity::Allow,
12468        warn_since: None,
12469        deny_since: None,
12470    },
12471    Lint {
12472        label: "pin_ergonomics",
12473        description: r##"# `pin_ergonomics`
12474
12475Experimental features that make `Pin` more ergonomic.
12476
12477The tracking issue for this feature is: [#130494]
12478
12479[#130494]: https://github.com/rust-lang/rust/issues/130494
12480
12481------------------------
12482"##,
12483        default_severity: Severity::Allow,
12484        warn_since: None,
12485        deny_since: None,
12486    },
12487    Lint {
12488        label: "pin_macro_internals",
12489        description: r##"# `pin_macro_internals`
12490
12491
12492
12493This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
12494
12495------------------------
12496"##,
12497        default_severity: Severity::Allow,
12498        warn_since: None,
12499        deny_since: None,
12500    },
12501    Lint {
12502        label: "pointer_is_aligned_to",
12503        description: r##"# `pointer_is_aligned_to`
12504
12505
12506
12507The tracking issue for this feature is: [#96284]
12508
12509[#96284]: https://github.com/rust-lang/rust/issues/96284
12510
12511------------------------
12512"##,
12513        default_severity: Severity::Allow,
12514        warn_since: None,
12515        deny_since: None,
12516    },
12517    Lint {
12518        label: "pointer_try_cast_aligned",
12519        description: r##"# `pointer_try_cast_aligned`
12520
12521
12522
12523The tracking issue for this feature is: [#141221]
12524
12525[#141221]: https://github.com/rust-lang/rust/issues/141221
12526
12527------------------------
12528"##,
12529        default_severity: Severity::Allow,
12530        warn_since: None,
12531        deny_since: None,
12532    },
12533    Lint {
12534        label: "portable_simd",
12535        description: r##"# `portable_simd`
12536
12537
12538
12539The tracking issue for this feature is: [#86656]
12540
12541[#86656]: https://github.com/rust-lang/rust/issues/86656
12542
12543------------------------
12544"##,
12545        default_severity: Severity::Allow,
12546        warn_since: None,
12547        deny_since: None,
12548    },
12549    Lint {
12550        label: "postfix_match",
12551        description: r##"# `postfix-match`
12552
12553`postfix-match` adds the feature for matching upon values postfix
12554the expressions that generate the values.
12555
12556The tracking issue for this feature is: [#121618](https://github.com/rust-lang/rust/issues/121618).
12557
12558------------------------
12559
12560```rust,edition2021
12561#![feature(postfix_match)]
12562
12563enum Foo {
12564    Bar,
12565    Baz
12566}
12567
12568fn get_foo() -> Foo {
12569    Foo::Bar
12570}
12571
12572get_foo().match {
12573    Foo::Bar => {},
12574    Foo::Baz => panic!(),
12575}
12576```
12577"##,
12578        default_severity: Severity::Allow,
12579        warn_since: None,
12580        deny_since: None,
12581    },
12582    Lint {
12583        label: "powerpc_target_feature",
12584        description: r##"# `powerpc_target_feature`
12585
12586Target features on powerpc.
12587
12588The tracking issue for this feature is: [#150255]
12589
12590[#150255]: https://github.com/rust-lang/rust/issues/150255
12591
12592------------------------
12593"##,
12594        default_severity: Severity::Allow,
12595        warn_since: None,
12596        deny_since: None,
12597    },
12598    Lint {
12599        label: "prelude_future",
12600        description: r##"# `prelude_future`
12601
12602
12603
12604This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
12605
12606------------------------
12607"##,
12608        default_severity: Severity::Allow,
12609        warn_since: None,
12610        deny_since: None,
12611    },
12612    Lint {
12613        label: "prelude_import",
12614        description: r##"# `prelude_import`
12615
12616Allows using `#[prelude_import]` on glob `use` items.
12617
12618This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
12619
12620------------------------
12621"##,
12622        default_severity: Severity::Allow,
12623        warn_since: None,
12624        deny_since: None,
12625    },
12626    Lint {
12627        label: "prelude_next",
12628        description: r##"# `prelude_next`
12629
12630
12631
12632This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
12633
12634------------------------
12635"##,
12636        default_severity: Severity::Allow,
12637        warn_since: None,
12638        deny_since: None,
12639    },
12640    Lint {
12641        label: "prfchw_target_feature",
12642        description: r##"# `prfchw_target_feature`
12643
12644The prfchw target feature on x86.
12645
12646The tracking issue for this feature is: [#150256]
12647
12648[#150256]: https://github.com/rust-lang/rust/issues/150256
12649
12650------------------------
12651"##,
12652        default_severity: Severity::Allow,
12653        warn_since: None,
12654        deny_since: None,
12655    },
12656    Lint {
12657        label: "print_internals",
12658        description: r##"# `print_internals`
12659
12660This feature is internal to the Rust compiler and is not intended for general use.
12661
12662------------------------
12663"##,
12664        default_severity: Severity::Allow,
12665        warn_since: None,
12666        deny_since: None,
12667    },
12668    Lint {
12669        label: "proc_macro_def_site",
12670        description: r##"# `proc_macro_def_site`
12671
12672
12673
12674The tracking issue for this feature is: [#54724]
12675
12676[#54724]: https://github.com/rust-lang/rust/issues/54724
12677
12678------------------------
12679"##,
12680        default_severity: Severity::Allow,
12681        warn_since: None,
12682        deny_since: None,
12683    },
12684    Lint {
12685        label: "proc_macro_diagnostic",
12686        description: r##"# `proc_macro_diagnostic`
12687
12688
12689
12690The tracking issue for this feature is: [#54140]
12691
12692[#54140]: https://github.com/rust-lang/rust/issues/54140
12693
12694------------------------
12695"##,
12696        default_severity: Severity::Allow,
12697        warn_since: None,
12698        deny_since: None,
12699    },
12700    Lint {
12701        label: "proc_macro_expand",
12702        description: r##"# `proc_macro_expand`
12703
12704
12705
12706The tracking issue for this feature is: [#90765]
12707
12708[#90765]: https://github.com/rust-lang/rust/issues/90765
12709
12710------------------------
12711"##,
12712        default_severity: Severity::Allow,
12713        warn_since: None,
12714        deny_since: None,
12715    },
12716    Lint {
12717        label: "proc_macro_hygiene",
12718        description: r##"# `proc_macro_hygiene`
12719
12720Allows macro attributes on expressions, statements and non-inline modules.
12721
12722The tracking issue for this feature is: [#54727]
12723
12724[#54727]: https://github.com/rust-lang/rust/issues/54727
12725
12726------------------------
12727"##,
12728        default_severity: Severity::Allow,
12729        warn_since: None,
12730        deny_since: None,
12731    },
12732    Lint {
12733        label: "proc_macro_internals",
12734        description: r##"# `proc_macro_internals`
12735
12736
12737
12738The tracking issue for this feature is: [#27812]
12739
12740[#27812]: https://github.com/rust-lang/rust/issues/27812
12741
12742------------------------
12743"##,
12744        default_severity: Severity::Allow,
12745        warn_since: None,
12746        deny_since: None,
12747    },
12748    Lint {
12749        label: "proc_macro_quote",
12750        description: r##"# `proc_macro_quote`
12751
12752
12753
12754The tracking issue for this feature is: [#54722]
12755
12756[#54722]: https://github.com/rust-lang/rust/issues/54722
12757
12758------------------------
12759"##,
12760        default_severity: Severity::Allow,
12761        warn_since: None,
12762        deny_since: None,
12763    },
12764    Lint {
12765        label: "proc_macro_span",
12766        description: r##"# `proc_macro_span`
12767
12768
12769
12770The tracking issue for this feature is: [#54725]
12771
12772[#54725]: https://github.com/rust-lang/rust/issues/54725
12773
12774------------------------
12775"##,
12776        default_severity: Severity::Allow,
12777        warn_since: None,
12778        deny_since: None,
12779    },
12780    Lint {
12781        label: "proc_macro_totokens",
12782        description: r##"# `proc_macro_totokens`
12783
12784
12785
12786The tracking issue for this feature is: [#130977]
12787
12788[#130977]: https://github.com/rust-lang/rust/issues/130977
12789
12790------------------------
12791"##,
12792        default_severity: Severity::Allow,
12793        warn_since: None,
12794        deny_since: None,
12795    },
12796    Lint {
12797        label: "proc_macro_tracked_env",
12798        description: r##"# `proc_macro_tracked_env`
12799
12800
12801
12802The tracking issue for this feature is: [#99515]
12803
12804[#99515]: https://github.com/rust-lang/rust/issues/99515
12805
12806------------------------
12807"##,
12808        default_severity: Severity::Allow,
12809        warn_since: None,
12810        deny_since: None,
12811    },
12812    Lint {
12813        label: "proc_macro_tracked_path",
12814        description: r##"# `proc_macro_tracked_path`
12815
12816
12817
12818The tracking issue for this feature is: [#99515]
12819
12820[#99515]: https://github.com/rust-lang/rust/issues/99515
12821
12822------------------------
12823"##,
12824        default_severity: Severity::Allow,
12825        warn_since: None,
12826        deny_since: None,
12827    },
12828    Lint {
12829        label: "proc_macro_value",
12830        description: r##"# `proc_macro_value`
12831
12832
12833
12834The tracking issue for this feature is: [#136652]
12835
12836[#136652]: https://github.com/rust-lang/rust/issues/136652
12837
12838------------------------
12839"##,
12840        default_severity: Severity::Allow,
12841        warn_since: None,
12842        deny_since: None,
12843    },
12844    Lint {
12845        label: "process_chroot",
12846        description: r##"# `process_chroot`
12847
12848
12849
12850The tracking issue for this feature is: [#141298]
12851
12852[#141298]: https://github.com/rust-lang/rust/issues/141298
12853
12854------------------------
12855"##,
12856        default_severity: Severity::Allow,
12857        warn_since: None,
12858        deny_since: None,
12859    },
12860    Lint {
12861        label: "process_exitcode_internals",
12862        description: r##"# `process_exitcode_internals`
12863
12864
12865
12866This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
12867
12868------------------------
12869"##,
12870        default_severity: Severity::Allow,
12871        warn_since: None,
12872        deny_since: None,
12873    },
12874    Lint {
12875        label: "process_internals",
12876        description: r##"# `process_internals`
12877
12878
12879
12880This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
12881
12882------------------------
12883"##,
12884        default_severity: Severity::Allow,
12885        warn_since: None,
12886        deny_since: None,
12887    },
12888    Lint {
12889        label: "process_setsid",
12890        description: r##"# `process_setsid`
12891
12892
12893
12894The tracking issue for this feature is: [#105376]
12895
12896[#105376]: https://github.com/rust-lang/rust/issues/105376
12897
12898------------------------
12899"##,
12900        default_severity: Severity::Allow,
12901        warn_since: None,
12902        deny_since: None,
12903    },
12904    Lint {
12905        label: "profiler_runtime",
12906        description: r##"# `profiler_runtime`
12907
12908The tracking issue for this feature is: [#42524](https://github.com/rust-lang/rust/issues/42524).
12909
12910------------------------
12911"##,
12912        default_severity: Severity::Allow,
12913        warn_since: None,
12914        deny_since: None,
12915    },
12916    Lint {
12917        label: "profiler_runtime_lib",
12918        description: r##"# `profiler_runtime_lib`
12919
12920This feature is internal to the Rust compiler and is not intended for general use.
12921
12922------------------------
12923"##,
12924        default_severity: Severity::Allow,
12925        warn_since: None,
12926        deny_since: None,
12927    },
12928    Lint {
12929        label: "profiling_marker_api",
12930        description: r##"# `profiling_marker_api`
12931
12932
12933
12934The tracking issue for this feature is: [#148197]
12935
12936[#148197]: https://github.com/rust-lang/rust/issues/148197
12937
12938------------------------
12939"##,
12940        default_severity: Severity::Allow,
12941        warn_since: None,
12942        deny_since: None,
12943    },
12944    Lint {
12945        label: "ptr_alignment_type",
12946        description: r##"# `ptr_alignment_type`
12947
12948
12949
12950The tracking issue for this feature is: [#102070]
12951
12952[#102070]: https://github.com/rust-lang/rust/issues/102070
12953
12954------------------------
12955"##,
12956        default_severity: Severity::Allow,
12957        warn_since: None,
12958        deny_since: None,
12959    },
12960    Lint {
12961        label: "ptr_as_uninit",
12962        description: r##"# `ptr_as_uninit`
12963
12964
12965
12966The tracking issue for this feature is: [#75402]
12967
12968[#75402]: https://github.com/rust-lang/rust/issues/75402
12969
12970------------------------
12971"##,
12972        default_severity: Severity::Allow,
12973        warn_since: None,
12974        deny_since: None,
12975    },
12976    Lint {
12977        label: "ptr_cast_array",
12978        description: r##"# `ptr_cast_array`
12979
12980
12981
12982The tracking issue for this feature is: [#144514]
12983
12984[#144514]: https://github.com/rust-lang/rust/issues/144514
12985
12986------------------------
12987"##,
12988        default_severity: Severity::Allow,
12989        warn_since: None,
12990        deny_since: None,
12991    },
12992    Lint {
12993        label: "ptr_cast_slice",
12994        description: r##"# `ptr_cast_slice`
12995
12996
12997
12998The tracking issue for this feature is: [#149103]
12999
13000[#149103]: https://github.com/rust-lang/rust/issues/149103
13001
13002------------------------
13003"##,
13004        default_severity: Severity::Allow,
13005        warn_since: None,
13006        deny_since: None,
13007    },
13008    Lint {
13009        label: "ptr_internals",
13010        description: r##"# `ptr_internals`
13011
13012
13013
13014This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
13015
13016------------------------
13017"##,
13018        default_severity: Severity::Allow,
13019        warn_since: None,
13020        deny_since: None,
13021    },
13022    Lint {
13023        label: "ptr_mask",
13024        description: r##"# `ptr_mask`
13025
13026
13027
13028The tracking issue for this feature is: [#98290]
13029
13030[#98290]: https://github.com/rust-lang/rust/issues/98290
13031
13032------------------------
13033"##,
13034        default_severity: Severity::Allow,
13035        warn_since: None,
13036        deny_since: None,
13037    },
13038    Lint {
13039        label: "ptr_metadata",
13040        description: r##"# `ptr_metadata`
13041
13042
13043
13044The tracking issue for this feature is: [#81513]
13045
13046[#81513]: https://github.com/rust-lang/rust/issues/81513
13047
13048------------------------
13049"##,
13050        default_severity: Severity::Allow,
13051        warn_since: None,
13052        deny_since: None,
13053    },
13054    Lint {
13055        label: "pub_crate_should_not_need_unstable_attr",
13056        description: r##"# `pub_crate_should_not_need_unstable_attr`
13057
13058
13059
13060This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
13061
13062------------------------
13063"##,
13064        default_severity: Severity::Allow,
13065        warn_since: None,
13066        deny_since: None,
13067    },
13068    Lint {
13069        label: "random",
13070        description: r##"# `random`
13071
13072
13073
13074The tracking issue for this feature is: [#130703]
13075
13076[#130703]: https://github.com/rust-lang/rust/issues/130703
13077
13078------------------------
13079"##,
13080        default_severity: Severity::Allow,
13081        warn_since: None,
13082        deny_since: None,
13083    },
13084    Lint {
13085        label: "range_bounds_is_empty",
13086        description: r##"# `range_bounds_is_empty`
13087
13088
13089
13090The tracking issue for this feature is: [#137300]
13091
13092[#137300]: https://github.com/rust-lang/rust/issues/137300
13093
13094------------------------
13095"##,
13096        default_severity: Severity::Allow,
13097        warn_since: None,
13098        deny_since: None,
13099    },
13100    Lint {
13101        label: "range_into_bounds",
13102        description: r##"# `range_into_bounds`
13103
13104
13105
13106The tracking issue for this feature is: [#136903]
13107
13108[#136903]: https://github.com/rust-lang/rust/issues/136903
13109
13110------------------------
13111"##,
13112        default_severity: Severity::Allow,
13113        warn_since: None,
13114        deny_since: None,
13115    },
13116    Lint {
13117        label: "raw_dylib_elf",
13118        description: r##"# `raw_dylib_elf`
13119
13120Allows the use of raw-dylibs on ELF platforms
13121
13122The tracking issue for this feature is: [#135694]
13123
13124[#135694]: https://github.com/rust-lang/rust/issues/135694
13125
13126------------------------
13127"##,
13128        default_severity: Severity::Allow,
13129        warn_since: None,
13130        deny_since: None,
13131    },
13132    Lint {
13133        label: "raw_os_error_ty",
13134        description: r##"# `raw_os_error_ty`
13135
13136
13137
13138The tracking issue for this feature is: [#107792]
13139
13140[#107792]: https://github.com/rust-lang/rust/issues/107792
13141
13142------------------------
13143"##,
13144        default_severity: Severity::Allow,
13145        warn_since: None,
13146        deny_since: None,
13147    },
13148    Lint {
13149        label: "raw_slice_split",
13150        description: r##"# `raw_slice_split`
13151
13152
13153
13154The tracking issue for this feature is: [#95595]
13155
13156[#95595]: https://github.com/rust-lang/rust/issues/95595
13157
13158------------------------
13159"##,
13160        default_severity: Severity::Allow,
13161        warn_since: None,
13162        deny_since: None,
13163    },
13164    Lint {
13165        label: "raw_vec_internals",
13166        description: r##"# `raw_vec_internals`
13167
13168
13169
13170This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
13171
13172------------------------
13173"##,
13174        default_severity: Severity::Allow,
13175        warn_since: None,
13176        deny_since: None,
13177    },
13178    Lint {
13179        label: "read_array",
13180        description: r##"# `read_array`
13181
13182
13183
13184The tracking issue for this feature is: [#148848]
13185
13186[#148848]: https://github.com/rust-lang/rust/issues/148848
13187
13188------------------------
13189"##,
13190        default_severity: Severity::Allow,
13191        warn_since: None,
13192        deny_since: None,
13193    },
13194    Lint {
13195        label: "read_buf",
13196        description: r##"# `read_buf`
13197
13198
13199
13200The tracking issue for this feature is: [#78485]
13201
13202[#78485]: https://github.com/rust-lang/rust/issues/78485
13203
13204------------------------
13205"##,
13206        default_severity: Severity::Allow,
13207        warn_since: None,
13208        deny_since: None,
13209    },
13210    Lint {
13211        label: "read_buf_at",
13212        description: r##"# `read_buf_at`
13213
13214
13215
13216The tracking issue for this feature is: [#140771]
13217
13218[#140771]: https://github.com/rust-lang/rust/issues/140771
13219
13220------------------------
13221"##,
13222        default_severity: Severity::Allow,
13223        warn_since: None,
13224        deny_since: None,
13225    },
13226    Lint {
13227        label: "reborrow",
13228        description: r##"# `reborrow`
13229
13230
13231
13232The tracking issue for this feature is: [#145612]
13233
13234[#145612]: https://github.com/rust-lang/rust/issues/145612
13235
13236------------------------
13237"##,
13238        default_severity: Severity::Allow,
13239        warn_since: None,
13240        deny_since: None,
13241    },
13242    Lint {
13243        label: "reentrant_lock",
13244        description: r##"# `reentrant_lock`
13245
13246
13247
13248The tracking issue for this feature is: [#121440]
13249
13250[#121440]: https://github.com/rust-lang/rust/issues/121440
13251
13252------------------------
13253"##,
13254        default_severity: Severity::Allow,
13255        warn_since: None,
13256        deny_since: None,
13257    },
13258    Lint {
13259        label: "reentrant_lock_data_ptr",
13260        description: r##"# `reentrant_lock_data_ptr`
13261
13262
13263
13264The tracking issue for this feature is: [#140368]
13265
13266[#140368]: https://github.com/rust-lang/rust/issues/140368
13267
13268------------------------
13269"##,
13270        default_severity: Severity::Allow,
13271        warn_since: None,
13272        deny_since: None,
13273    },
13274    Lint {
13275        label: "ref_pat_eat_one_layer_2024",
13276        description: r##"# `ref_pat_eat_one_layer_2024`
13277
13278The tracking issue for this feature is: [#123076]
13279
13280[#123076]: https://github.com/rust-lang/rust/issues/123076
13281
13282---
13283
13284This feature is incomplete and not yet intended for general use.
13285
13286This implements experimental, Edition-dependent match ergonomics under consideration for inclusion
13287in Rust, allowing `&` patterns in more places. For example:
13288
13289```rust,edition2024
13290#![feature(ref_pat_eat_one_layer_2024)]
13291#![allow(incomplete_features)]
13292#
13293# // Tests type equality in a way that avoids coercing `&&T` or `&mut T` to `&T`.
13294# trait Eq<T> {}
13295# impl<T> Eq<T> for T {}
13296# fn has_type<T>(_: impl Eq<T>) {}
13297
13298// `&` can match against a `ref` binding mode instead of a reference type:
13299let (x, &y) = &(0, 1);
13300has_type::<&u8>(x);
13301has_type::<u8>(y);
13302
13303// `&` can match against `&mut` references:
13304let &z = &mut 2;
13305has_type::<u8>(z);
13306```
13307
13308For specifics, see the corresponding typing rules for [Editions 2021 and earlier] and for
13309[Editions 2024 and later]. For more information on binding modes, see [The Rust Reference].
13310
13311For alternative experimental match ergonomics, see the feature
13312[`ref_pat_eat_one_layer_2024_structural`](./ref-pat-eat-one-layer-2024-structural.md).
13313
13314[Editions 2021 and earlier]: https://nadrieril.github.io/typing-rust-patterns/?compare=false&opts1=AQEBAQIBAQABAAAAAQEBAAEBAAABAAA%3D&mode=rules&do_cmp=false
13315[Editions 2024 and later]: https://nadrieril.github.io/typing-rust-patterns/?compare=false&opts1=AQEBAAABAQABAgIAAQEBAAEBAAABAAA%3D&mode=rules&do_cmp=false
13316[The Rust Reference]: https://doc.rust-lang.org/reference/patterns.html#binding-modes
13317"##,
13318        default_severity: Severity::Allow,
13319        warn_since: None,
13320        deny_since: None,
13321    },
13322    Lint {
13323        label: "ref_pat_eat_one_layer_2024_structural",
13324        description: r##"# `ref_pat_eat_one_layer_2024_structural`
13325
13326The tracking issue for this feature is: [#123076]
13327
13328[#123076]: https://github.com/rust-lang/rust/issues/123076
13329
13330---
13331
13332This feature is incomplete and not yet intended for general use.
13333
13334This implements experimental, Edition-dependent match ergonomics under consideration for inclusion
13335in Rust, allowing `&` patterns in more places. For example:
13336```rust,edition2024
13337#![feature(ref_pat_eat_one_layer_2024_structural)]
13338#![allow(incomplete_features)]
13339#
13340# // Tests type equality in a way that avoids coercing `&&T` or `&mut T` to `&T`.
13341# trait Eq<T> {}
13342# impl<T> Eq<T> for T {}
13343# fn has_type<T>(_: impl Eq<T>) {}
13344
13345// `&` can match against a `ref` binding mode instead of a reference type:
13346let (x, &y) = &(0, 1);
13347has_type::<&u8>(x);
13348has_type::<u8>(y);
13349
13350// `&` can match against `&mut` references:
13351let &z = &mut 2;
13352has_type::<u8>(z);
13353```
13354
13355For specifics, see the corresponding typing rules for [Editions 2021 and earlier] and for
13356[Editions 2024 and later]. For more information on binding modes, see [The Rust Reference].
13357
13358For alternative experimental match ergonomics, see the feature
13359[`ref_pat_eat_one_layer_2024`](./ref-pat-eat-one-layer-2024.md).
13360
13361[Editions 2021 and earlier]: https://nadrieril.github.io/typing-rust-patterns/?compare=false&opts1=AQEBAQIBAQEBAAAAAAAAAAAAAAAAAAA%3D&mode=rules&do_cmp=false
13362[Editions 2024 and later]: https://nadrieril.github.io/typing-rust-patterns/?compare=false&opts1=AQEBAgEBAQEBAgIAAAAAAAAAAAAAAAA%3D&mode=rules&do_cmp=false
13363[The Rust Reference]: https://doc.rust-lang.org/reference/patterns.html#binding-modes
13364"##,
13365        default_severity: Severity::Allow,
13366        warn_since: None,
13367        deny_since: None,
13368    },
13369    Lint {
13370        label: "refcell_try_map",
13371        description: r##"# `refcell_try_map`
13372
13373
13374
13375The tracking issue for this feature is: [#143801]
13376
13377[#143801]: https://github.com/rust-lang/rust/issues/143801
13378
13379------------------------
13380"##,
13381        default_severity: Severity::Allow,
13382        warn_since: None,
13383        deny_since: None,
13384    },
13385    Lint {
13386        label: "register_tool",
13387        description: r##"# `register_tool`
13388
13389The tracking issue for this feature is: [#66079]
13390
13391[#66079]: https://github.com/rust-lang/rust/issues/66079
13392
13393------------------------
13394
13395The `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.
13396
13397`register_tool` also allows configuring lint levels for external tools.
13398
13399Tool 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).
13400
13401------------------------
13402
13403`#![register_tool(tool)]` is an attribute, and is only valid at the crate root.
13404Attributes 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.
13405
13406Semantically, `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.
13407When compiling with `-Z unstable-features`, `rustc::*` lints can also be used. Like `rustdoc`, the `rustc` namespace can only be used with lints, not attributes.
13408
13409The compiler will emit an error if it encounters a lint/attribute whose namespace isn't a registered tool.
13410
13411Tool namespaces cannot be nested; `register_tool(main_tool::subtool)` is an error.
13412
13413## Examples
13414
13415Tool attributes:
13416
13417```rust
13418#![feature(register_tool)]
13419#![register_tool(c2rust)]
13420
13421// Mark which C header file this module was generated from.
13422#[c2rust::header_src = "operations.h"]
13423pub mod operations_h {
13424    use std::ffi::c_int;
13425
13426    // Mark which source line this struct was generated from.
13427    #[c2rust::src_loc = "11:0"]
13428    pub struct Point {
13429        pub x: c_int,
13430        pub y: c_int,
13431    }
13432}
13433```
13434
13435Tool lints:
13436
13437```
13438#![feature(register_tool)]
13439#![register_tool(bevy)]
13440#![deny(bevy::duplicate_bevy_dependencies)]
13441```
13442"##,
13443        default_severity: Severity::Allow,
13444        warn_since: None,
13445        deny_since: None,
13446    },
13447    Lint {
13448        label: "repr_simd",
13449        description: r##"# `repr_simd`
13450
13451Allows `repr(simd)` and importing the various simd intrinsics.
13452
13453The tracking issue for this feature is: [#27731]
13454
13455[#27731]: https://github.com/rust-lang/rust/issues/27731
13456
13457------------------------
13458"##,
13459        default_severity: Severity::Allow,
13460        warn_since: None,
13461        deny_since: None,
13462    },
13463    Lint {
13464        label: "restricted_std",
13465        description: r##"# `restricted_std`
13466
13467
13468
13469This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
13470
13471------------------------
13472"##,
13473        default_severity: Severity::Allow,
13474        warn_since: None,
13475        deny_since: None,
13476    },
13477    Lint {
13478        label: "result_option_map_or_default",
13479        description: r##"# `result_option_map_or_default`
13480
13481
13482
13483The tracking issue for this feature is: [#138099]
13484
13485[#138099]: https://github.com/rust-lang/rust/issues/138099
13486
13487------------------------
13488"##,
13489        default_severity: Severity::Allow,
13490        warn_since: None,
13491        deny_since: None,
13492    },
13493    Lint {
13494        label: "return_address",
13495        description: r##"# `return_address`
13496
13497
13498
13499The tracking issue for this feature is: [#154966]
13500
13501[#154966]: https://github.com/rust-lang/rust/issues/154966
13502
13503------------------------
13504"##,
13505        default_severity: Severity::Allow,
13506        warn_since: None,
13507        deny_since: None,
13508    },
13509    Lint {
13510        label: "return_type_notation",
13511        description: r##"# `return_type_notation`
13512
13513Allows bounding the return type of AFIT/RPITIT.
13514
13515The tracking issue for this feature is: [#109417]
13516
13517[#109417]: https://github.com/rust-lang/rust/issues/109417
13518
13519------------------------
13520"##,
13521        default_severity: Severity::Allow,
13522        warn_since: None,
13523        deny_since: None,
13524    },
13525    Lint {
13526        label: "rev_into_inner",
13527        description: r##"# `rev_into_inner`
13528
13529
13530
13531The tracking issue for this feature is: [#144277]
13532
13533[#144277]: https://github.com/rust-lang/rust/issues/144277
13534
13535------------------------
13536"##,
13537        default_severity: Severity::Allow,
13538        warn_since: None,
13539        deny_since: None,
13540    },
13541    Lint {
13542        label: "riscv_target_feature",
13543        description: r##"# `riscv_target_feature`
13544
13545Target features on riscv.
13546
13547The tracking issue for this feature is: [#150257]
13548
13549[#150257]: https://github.com/rust-lang/rust/issues/150257
13550
13551------------------------
13552"##,
13553        default_severity: Severity::Allow,
13554        warn_since: None,
13555        deny_since: None,
13556    },
13557    Lint {
13558        label: "rt",
13559        description: r##"# `rt`
13560
13561This feature is internal to the Rust compiler and is not intended for general use.
13562
13563------------------------
13564"##,
13565        default_severity: Severity::Allow,
13566        warn_since: None,
13567        deny_since: None,
13568    },
13569    Lint {
13570        label: "rtm_target_feature",
13571        description: r##"# `rtm_target_feature`
13572
13573The rtm target feature on x86.
13574
13575The tracking issue for this feature is: [#150258]
13576
13577[#150258]: https://github.com/rust-lang/rust/issues/150258
13578
13579------------------------
13580"##,
13581        default_severity: Severity::Allow,
13582        warn_since: None,
13583        deny_since: None,
13584    },
13585    Lint {
13586        label: "rust_cold_cc",
13587        description: r##"# `rust_cold_cc`
13588
13589Allows `extern "rust-cold"`.
13590
13591The tracking issue for this feature is: [#97544]
13592
13593[#97544]: https://github.com/rust-lang/rust/issues/97544
13594
13595------------------------
13596"##,
13597        default_severity: Severity::Allow,
13598        warn_since: None,
13599        deny_since: None,
13600    },
13601    Lint {
13602        label: "rust_preserve_none_cc",
13603        description: r##"# `rust_preserve_none_cc`
13604
13605Allows `extern "rust-preserve-none"`.
13606
13607The tracking issue for this feature is: [#151401]
13608
13609[#151401]: https://github.com/rust-lang/rust/issues/151401
13610
13611------------------------
13612"##,
13613        default_severity: Severity::Allow,
13614        warn_since: None,
13615        deny_since: None,
13616    },
13617    Lint {
13618        label: "rustc_attrs",
13619        description: r##"# `rustc_attrs`
13620
13621This feature has no tracking issue, and is therefore internal to
13622the compiler, not being intended for general use.
13623
13624Note: `rustc_attrs` enables many rustc-internal attributes and this page
13625only discuss a few of them.
13626
13627------------------------
13628
13629The `rustc_attrs` feature allows debugging rustc type layouts by using
13630`#[rustc_dump_layout(...)]` to debug layout at compile time (it even works
13631with `cargo check`) as an alternative to `rustc -Z print-type-sizes`
13632that is way more verbose.
13633
13634Options provided by `#[rustc_dump_layout(...)]` are `backend_repr`, `align`,
13635`debug`, `homogeneous_aggregate` and `size`.
13636Note that it only works on sized types without generics.
13637
13638## Examples
13639
13640```rust,compile_fail
13641#![feature(rustc_attrs)]
13642
13643#[rustc_dump_layout(backend_repr, size)]
13644pub enum X {
13645    Y(u8, u8, u8),
13646    Z(isize),
13647}
13648```
13649
13650When that is compiled, the compiler will error with something like
13651
13652```text
13653error: backend_repr: Aggregate { sized: true }
13654 --> src/lib.rs:4:1
13655  |
136564 | / pub enum T {
136575 | |     Y(u8, u8, u8),
136586 | |     Z(isize),
136597 | | }
13660  | |_^
13661
13662error: size: Size { raw: 16 }
13663 --> src/lib.rs:4:1
13664  |
136654 | / pub enum T {
136665 | |     Y(u8, u8, u8),
136676 | |     Z(isize),
136687 | | }
13669  | |_^
13670
13671error: aborting due to 2 previous errors
13672```
13673"##,
13674        default_severity: Severity::Allow,
13675        warn_since: None,
13676        deny_since: None,
13677    },
13678    Lint {
13679        label: "rustc_private",
13680        description: r##"# `rustc_private`
13681
13682The tracking issue for this feature is: [#27812]
13683
13684[#27812]: https://github.com/rust-lang/rust/issues/27812
13685
13686------------------------
13687
13688This feature allows access to unstable internal compiler crates such as `rustc_driver`.
13689
13690The presence of this feature changes the way the linkage format for dylibs is calculated in a way
13691that is necessary for linking against dylibs that statically link `std` (such as `rustc_driver`).
13692This makes this feature "viral" in linkage; its use in a given crate makes its use required in
13693dependent crates which link to it (including integration tests, which are built as separate crates).
13694
13695## Common linker failures related to missing LLVM libraries
13696
13697### When using `rustc-private` with Official Toolchains
13698
13699When using the `rustc_private` feature with official toolchains distributed via rustup, you'll need to install:
13700
137011. The `rustc-dev` component (provides compiler libraries)
137022. The `llvm-tools` component (provides LLVM libraries needed for linking)
13703
13704You can install these components using `rustup`:
13705
13706```text
13707rustup component add rustc-dev llvm-tools
13708```
13709
13710Without the `llvm-tools` component, you may encounter linking errors like:
13711
13712```text
13713error: linking with `cc` failed: exit status: 1
13714  |
13715  = note: rust-lld: error: unable to find library -lLLVM-{version}
13716```
13717
13718### When using `rustc-private` with Custom Toolchains
13719
13720For custom-built toolchains or environments not using rustup, different configuration may be required:
13721
13722- Ensure LLVM libraries are available in your library search paths
13723- You might need to configure library paths explicitly depending on your LLVM installation
13724"##,
13725        default_severity: Severity::Allow,
13726        warn_since: None,
13727        deny_since: None,
13728    },
13729    Lint {
13730        label: "rustdoc_internals",
13731        description: r##"# `rustdoc_internals`
13732
13733Allows using internal rustdoc features like `doc(keyword)`.
13734
13735The tracking issue for this feature is: [#90418]
13736
13737[#90418]: https://github.com/rust-lang/rust/issues/90418
13738
13739------------------------
13740"##,
13741        default_severity: Severity::Allow,
13742        warn_since: None,
13743        deny_since: None,
13744    },
13745    Lint {
13746        label: "rustdoc_missing_doc_code_examples",
13747        description: r##"# `rustdoc_missing_doc_code_examples`
13748
13749Allows using the `rustdoc::missing_doc_code_examples` lint
13750
13751The tracking issue for this feature is: [#101730]
13752
13753[#101730]: https://github.com/rust-lang/rust/issues/101730
13754
13755------------------------
13756"##,
13757        default_severity: Severity::Allow,
13758        warn_since: None,
13759        deny_since: None,
13760    },
13761    Lint {
13762        label: "rwlock_data_ptr",
13763        description: r##"# `rwlock_data_ptr`
13764
13765
13766
13767The tracking issue for this feature is: [#140368]
13768
13769[#140368]: https://github.com/rust-lang/rust/issues/140368
13770
13771------------------------
13772"##,
13773        default_severity: Severity::Allow,
13774        warn_since: None,
13775        deny_since: None,
13776    },
13777    Lint {
13778        label: "s390x_target_feature",
13779        description: r##"# `s390x_target_feature`
13780
13781Target features on s390x.
13782
13783The tracking issue for this feature is: [#150259]
13784
13785[#150259]: https://github.com/rust-lang/rust/issues/150259
13786
13787------------------------
13788"##,
13789        default_severity: Severity::Allow,
13790        warn_since: None,
13791        deny_since: None,
13792    },
13793    Lint {
13794        label: "sanitize",
13795        description: r##"# `sanitize`
13796
13797The tracking issue for this feature is: [#39699]
13798
13799[#39699]: https://github.com/rust-lang/rust/issues/39699
13800
13801------------------------
13802
13803The `sanitize` attribute can be used to selectively disable or enable sanitizer
13804instrumentation in an annotated function. This might be useful to: avoid
13805instrumentation overhead in a performance critical function, or avoid
13806instrumenting code that contains constructs unsupported by given sanitizer.
13807
13808The precise effect of this annotation depends on particular sanitizer in use.
13809For example, with `sanitize(thread = "off")`, the thread sanitizer will no
13810longer instrument non-atomic store / load operations, but it will instrument
13811atomic operations to avoid reporting false positives and provide meaning full
13812stack traces.
13813
13814This attribute was previously named `no_sanitize`.
13815
13816## Examples
13817
13818``` rust
13819#![feature(sanitize)]
13820
13821#[sanitize(address = "off")]
13822fn foo() {
13823  // ...
13824}
13825```
13826
13827It is also possible to disable sanitizers for entire modules and enable them
13828for single items or functions.
13829
13830```rust
13831#![feature(sanitize)]
13832
13833#[sanitize(address = "off")]
13834mod foo {
13835  fn unsanitized() {
13836    // ...
13837  }
13838
13839  #[sanitize(address = "on")]
13840  fn sanitized() {
13841    // ...
13842  }
13843}
13844```
13845
13846It's also applicable to impl blocks.
13847
13848```rust
13849#![feature(sanitize)]
13850
13851trait MyTrait {
13852  fn foo(&self);
13853  fn bar(&self);
13854}
13855
13856#[sanitize(address = "off")]
13857impl MyTrait for () {
13858  fn foo(&self) {
13859    // ...
13860  }
13861
13862  #[sanitize(address = "on")]
13863  fn bar(&self) {
13864    // ...
13865  }
13866}
13867```
13868"##,
13869        default_severity: Severity::Allow,
13870        warn_since: None,
13871        deny_since: None,
13872    },
13873    Lint {
13874        label: "sealed",
13875        description: r##"# `sealed`
13876
13877
13878
13879This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
13880
13881------------------------
13882"##,
13883        default_severity: Severity::Allow,
13884        warn_since: None,
13885        deny_since: None,
13886    },
13887    Lint {
13888        label: "seek_io_take_position",
13889        description: r##"# `seek_io_take_position`
13890
13891
13892
13893The tracking issue for this feature is: [#97227]
13894
13895[#97227]: https://github.com/rust-lang/rust/issues/97227
13896
13897------------------------
13898"##,
13899        default_severity: Severity::Allow,
13900        warn_since: None,
13901        deny_since: None,
13902    },
13903    Lint {
13904        label: "seek_stream_len",
13905        description: r##"# `seek_stream_len`
13906
13907
13908
13909The tracking issue for this feature is: [#59359]
13910
13911[#59359]: https://github.com/rust-lang/rust/issues/59359
13912
13913------------------------
13914"##,
13915        default_severity: Severity::Allow,
13916        warn_since: None,
13917        deny_since: None,
13918    },
13919    Lint {
13920        label: "set_permissions_nofollow",
13921        description: r##"# `set_permissions_nofollow`
13922
13923
13924
13925The tracking issue for this feature is: [#141607]
13926
13927[#141607]: https://github.com/rust-lang/rust/issues/141607
13928
13929------------------------
13930"##,
13931        default_severity: Severity::Allow,
13932        warn_since: None,
13933        deny_since: None,
13934    },
13935    Lint {
13936        label: "set_ptr_value",
13937        description: r##"# `set_ptr_value`
13938
13939
13940
13941The tracking issue for this feature is: [#75091]
13942
13943[#75091]: https://github.com/rust-lang/rust/issues/75091
13944
13945------------------------
13946"##,
13947        default_severity: Severity::Allow,
13948        warn_since: None,
13949        deny_since: None,
13950    },
13951    Lint {
13952        label: "setgroups",
13953        description: r##"# `setgroups`
13954
13955
13956
13957The tracking issue for this feature is: [#90747]
13958
13959[#90747]: https://github.com/rust-lang/rust/issues/90747
13960
13961------------------------
13962"##,
13963        default_severity: Severity::Allow,
13964        warn_since: None,
13965        deny_since: None,
13966    },
13967    Lint {
13968        label: "sgx_platform",
13969        description: r##"# `sgx_platform`
13970
13971
13972
13973The tracking issue for this feature is: [#56975]
13974
13975[#56975]: https://github.com/rust-lang/rust/issues/56975
13976
13977------------------------
13978"##,
13979        default_severity: Severity::Allow,
13980        warn_since: None,
13981        deny_since: None,
13982    },
13983    Lint {
13984        label: "share_trait",
13985        description: r##"# `share_trait`
13986
13987
13988
13989The tracking issue for this feature is: [#156756]
13990
13991[#156756]: https://github.com/rust-lang/rust/issues/156756
13992
13993------------------------
13994"##,
13995        default_severity: Severity::Allow,
13996        warn_since: None,
13997        deny_since: None,
13998    },
13999    Lint {
14000        label: "signed_bigint_helpers",
14001        description: r##"# `signed_bigint_helpers`
14002
14003
14004
14005The tracking issue for this feature is: [#151989]
14006
14007[#151989]: https://github.com/rust-lang/rust/issues/151989
14008
14009------------------------
14010"##,
14011        default_severity: Severity::Allow,
14012        warn_since: None,
14013        deny_since: None,
14014    },
14015    Lint {
14016        label: "simd_ffi",
14017        description: r##"# `simd_ffi`
14018
14019Allows the use of SIMD types in functions declared in `extern` blocks.
14020
14021The tracking issue for this feature is: [#27731]
14022
14023[#27731]: https://github.com/rust-lang/rust/issues/27731
14024
14025------------------------
14026"##,
14027        default_severity: Severity::Allow,
14028        warn_since: None,
14029        deny_since: None,
14030    },
14031    Lint {
14032        label: "sized_hierarchy",
14033        description: r##"# `sized_hierarchy`
14034
14035Introduces a hierarchy of `Sized` traits (RFC 3729).
14036
14037The tracking issue for this feature is: [#144404]
14038
14039[#144404]: https://github.com/rust-lang/rust/issues/144404
14040
14041------------------------
14042"##,
14043        default_severity: Severity::Allow,
14044        warn_since: None,
14045        deny_since: None,
14046    },
14047    Lint {
14048        label: "sized_type_properties",
14049        description: r##"# `sized_type_properties`
14050
14051
14052
14053This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
14054
14055------------------------
14056"##,
14057        default_severity: Severity::Allow,
14058        warn_since: None,
14059        deny_since: None,
14060    },
14061    Lint {
14062        label: "slice_concat_ext",
14063        description: r##"# `slice_concat_ext`
14064
14065
14066
14067The tracking issue for this feature is: [#27747]
14068
14069[#27747]: https://github.com/rust-lang/rust/issues/27747
14070
14071------------------------
14072"##,
14073        default_severity: Severity::Allow,
14074        warn_since: None,
14075        deny_since: None,
14076    },
14077    Lint {
14078        label: "slice_concat_trait",
14079        description: r##"# `slice_concat_trait`
14080
14081
14082
14083The tracking issue for this feature is: [#27747]
14084
14085[#27747]: https://github.com/rust-lang/rust/issues/27747
14086
14087------------------------
14088"##,
14089        default_severity: Severity::Allow,
14090        warn_since: None,
14091        deny_since: None,
14092    },
14093    Lint {
14094        label: "slice_from_ptr_range",
14095        description: r##"# `slice_from_ptr_range`
14096
14097
14098
14099The tracking issue for this feature is: [#89792]
14100
14101[#89792]: https://github.com/rust-lang/rust/issues/89792
14102
14103------------------------
14104"##,
14105        default_severity: Severity::Allow,
14106        warn_since: None,
14107        deny_since: None,
14108    },
14109    Lint {
14110        label: "slice_index_methods",
14111        description: r##"# `slice_index_methods`
14112
14113
14114
14115This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
14116
14117------------------------
14118"##,
14119        default_severity: Severity::Allow,
14120        warn_since: None,
14121        deny_since: None,
14122    },
14123    Lint {
14124        label: "slice_internals",
14125        description: r##"# `slice_internals`
14126
14127
14128
14129This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
14130
14131------------------------
14132"##,
14133        default_severity: Severity::Allow,
14134        warn_since: None,
14135        deny_since: None,
14136    },
14137    Lint {
14138        label: "slice_iter_mut_as_mut_slice",
14139        description: r##"# `slice_iter_mut_as_mut_slice`
14140
14141
14142
14143The tracking issue for this feature is: [#93079]
14144
14145[#93079]: https://github.com/rust-lang/rust/issues/93079
14146
14147------------------------
14148"##,
14149        default_severity: Severity::Allow,
14150        warn_since: None,
14151        deny_since: None,
14152    },
14153    Lint {
14154        label: "slice_partial_sort_unstable",
14155        description: r##"# `slice_partial_sort_unstable`
14156
14157
14158
14159The tracking issue for this feature is: [#149046]
14160
14161[#149046]: https://github.com/rust-lang/rust/issues/149046
14162
14163------------------------
14164"##,
14165        default_severity: Severity::Allow,
14166        warn_since: None,
14167        deny_since: None,
14168    },
14169    Lint {
14170        label: "slice_partition_dedup",
14171        description: r##"# `slice_partition_dedup`
14172
14173
14174
14175The tracking issue for this feature is: [#54279]
14176
14177[#54279]: https://github.com/rust-lang/rust/issues/54279
14178
14179------------------------
14180"##,
14181        default_severity: Severity::Allow,
14182        warn_since: None,
14183        deny_since: None,
14184    },
14185    Lint {
14186        label: "slice_pattern",
14187        description: r##"# `slice_pattern`
14188
14189
14190
14191The tracking issue for this feature is: [#56345]
14192
14193[#56345]: https://github.com/rust-lang/rust/issues/56345
14194
14195------------------------
14196"##,
14197        default_severity: Severity::Allow,
14198        warn_since: None,
14199        deny_since: None,
14200    },
14201    Lint {
14202        label: "slice_ptr_get",
14203        description: r##"# `slice_ptr_get`
14204
14205
14206
14207The tracking issue for this feature is: [#74265]
14208
14209[#74265]: https://github.com/rust-lang/rust/issues/74265
14210
14211------------------------
14212"##,
14213        default_severity: Severity::Allow,
14214        warn_since: None,
14215        deny_since: None,
14216    },
14217    Lint {
14218        label: "slice_range",
14219        description: r##"# `slice_range`
14220
14221
14222
14223The tracking issue for this feature is: [#76393]
14224
14225[#76393]: https://github.com/rust-lang/rust/issues/76393
14226
14227------------------------
14228"##,
14229        default_severity: Severity::Allow,
14230        warn_since: None,
14231        deny_since: None,
14232    },
14233    Lint {
14234        label: "slice_shift",
14235        description: r##"# `slice_shift`
14236
14237
14238
14239The tracking issue for this feature is: [#151772]
14240
14241[#151772]: https://github.com/rust-lang/rust/issues/151772
14242
14243------------------------
14244"##,
14245        default_severity: Severity::Allow,
14246        warn_since: None,
14247        deny_since: None,
14248    },
14249    Lint {
14250        label: "slice_split_once",
14251        description: r##"# `slice_split_once`
14252
14253
14254
14255The tracking issue for this feature is: [#112811]
14256
14257[#112811]: https://github.com/rust-lang/rust/issues/112811
14258
14259------------------------
14260"##,
14261        default_severity: Severity::Allow,
14262        warn_since: None,
14263        deny_since: None,
14264    },
14265    Lint {
14266        label: "slice_swap_unchecked",
14267        description: r##"# `slice_swap_unchecked`
14268
14269
14270
14271The tracking issue for this feature is: [#88539]
14272
14273[#88539]: https://github.com/rust-lang/rust/issues/88539
14274
14275------------------------
14276"##,
14277        default_severity: Severity::Allow,
14278        warn_since: None,
14279        deny_since: None,
14280    },
14281    Lint {
14282        label: "sliceindex_wrappers",
14283        description: r##"# `sliceindex_wrappers`
14284
14285
14286
14287The tracking issue for this feature is: [#146179]
14288
14289[#146179]: https://github.com/rust-lang/rust/issues/146179
14290
14291------------------------
14292"##,
14293        default_severity: Severity::Allow,
14294        warn_since: None,
14295        deny_since: None,
14296    },
14297    Lint {
14298        label: "smart_pointer_try_map",
14299        description: r##"# `smart_pointer_try_map`
14300
14301
14302
14303The tracking issue for this feature is: [#144419]
14304
14305[#144419]: https://github.com/rust-lang/rust/issues/144419
14306
14307------------------------
14308"##,
14309        default_severity: Severity::Allow,
14310        warn_since: None,
14311        deny_since: None,
14312    },
14313    Lint {
14314        label: "solid_ext",
14315        description: r##"# `solid_ext`
14316
14317
14318
14319This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
14320
14321------------------------
14322"##,
14323        default_severity: Severity::Allow,
14324        warn_since: None,
14325        deny_since: None,
14326    },
14327    Lint {
14328        label: "sort_floats",
14329        description: r##"# `sort_floats`
14330
14331
14332
14333The tracking issue for this feature is: [#93396]
14334
14335[#93396]: https://github.com/rust-lang/rust/issues/93396
14336
14337------------------------
14338"##,
14339        default_severity: Severity::Allow,
14340        warn_since: None,
14341        deny_since: None,
14342    },
14343    Lint {
14344        label: "sparc_target_feature",
14345        description: r##"# `sparc_target_feature`
14346
14347Target features on sparc.
14348
14349The tracking issue for this feature is: [#132783]
14350
14351[#132783]: https://github.com/rust-lang/rust/issues/132783
14352
14353------------------------
14354"##,
14355        default_severity: Severity::Allow,
14356        warn_since: None,
14357        deny_since: None,
14358    },
14359    Lint {
14360        label: "specialization",
14361        description: r##"# `specialization`
14362
14363Allows specialization of implementations (RFC 1210).
14364
14365The tracking issue for this feature is: [#31844]
14366
14367[#31844]: https://github.com/rust-lang/rust/issues/31844
14368
14369------------------------
14370"##,
14371        default_severity: Severity::Allow,
14372        warn_since: None,
14373        deny_since: None,
14374    },
14375    Lint {
14376        label: "split_array",
14377        description: r##"# `split_array`
14378
14379
14380
14381The tracking issue for this feature is: [#90091]
14382
14383[#90091]: https://github.com/rust-lang/rust/issues/90091
14384
14385------------------------
14386"##,
14387        default_severity: Severity::Allow,
14388        warn_since: None,
14389        deny_since: None,
14390    },
14391    Lint {
14392        label: "split_as_slice",
14393        description: r##"# `split_as_slice`
14394
14395
14396
14397The tracking issue for this feature is: [#96137]
14398
14399[#96137]: https://github.com/rust-lang/rust/issues/96137
14400
14401------------------------
14402"##,
14403        default_severity: Severity::Allow,
14404        warn_since: None,
14405        deny_since: None,
14406    },
14407    Lint {
14408        label: "staged_api",
14409        description: r##"# `staged_api`
14410
14411Allows using the `#[stable]` and `#[unstable]` attributes.
14412
14413This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
14414
14415------------------------
14416"##,
14417        default_severity: Severity::Allow,
14418        warn_since: None,
14419        deny_since: None,
14420    },
14421    Lint {
14422        label: "static_align",
14423        description: r##"# `static_align`
14424
14425Allows using `#[rustc_align_static(...)]` on static items.
14426
14427The tracking issue for this feature is: [#146177]
14428
14429[#146177]: https://github.com/rust-lang/rust/issues/146177
14430
14431------------------------
14432"##,
14433        default_severity: Severity::Allow,
14434        warn_since: None,
14435        deny_since: None,
14436    },
14437    Lint {
14438        label: "std_internals",
14439        description: r##"# `std_internals`
14440
14441
14442
14443This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
14444
14445------------------------
14446"##,
14447        default_severity: Severity::Allow,
14448        warn_since: None,
14449        deny_since: None,
14450    },
14451    Lint {
14452        label: "stdarch_aarch64_feature_detection",
14453        description: r##"# `stdarch_aarch64_feature_detection`
14454
14455
14456
14457The tracking issue for this feature is: [#127764]
14458
14459[#127764]: https://github.com/rust-lang/rust/issues/127764
14460
14461------------------------
14462"##,
14463        default_severity: Severity::Allow,
14464        warn_since: None,
14465        deny_since: None,
14466    },
14467    Lint {
14468        label: "stdarch_arm_feature_detection",
14469        description: r##"# `stdarch_arm_feature_detection`
14470
14471
14472
14473The tracking issue for this feature is: [#111190]
14474
14475[#111190]: https://github.com/rust-lang/rust/issues/111190
14476
14477------------------------
14478"##,
14479        default_severity: Severity::Allow,
14480        warn_since: None,
14481        deny_since: None,
14482    },
14483    Lint {
14484        label: "stdarch_internal",
14485        description: r##"# `stdarch_internal`
14486
14487
14488
14489This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
14490
14491------------------------
14492"##,
14493        default_severity: Severity::Allow,
14494        warn_since: None,
14495        deny_since: None,
14496    },
14497    Lint {
14498        label: "stdarch_loongarch_feature_detection",
14499        description: r##"# `stdarch_loongarch_feature_detection`
14500
14501
14502
14503The tracking issue for this feature is: [#117425]
14504
14505[#117425]: https://github.com/rust-lang/rust/issues/117425
14506
14507------------------------
14508"##,
14509        default_severity: Severity::Allow,
14510        warn_since: None,
14511        deny_since: None,
14512    },
14513    Lint {
14514        label: "stdarch_mips_feature_detection",
14515        description: r##"# `stdarch_mips_feature_detection`
14516
14517
14518
14519The tracking issue for this feature is: [#111188]
14520
14521[#111188]: https://github.com/rust-lang/rust/issues/111188
14522
14523------------------------
14524"##,
14525        default_severity: Severity::Allow,
14526        warn_since: None,
14527        deny_since: None,
14528    },
14529    Lint {
14530        label: "stdarch_powerpc_feature_detection",
14531        description: r##"# `stdarch_powerpc_feature_detection`
14532
14533
14534
14535The tracking issue for this feature is: [#111191]
14536
14537[#111191]: https://github.com/rust-lang/rust/issues/111191
14538
14539------------------------
14540"##,
14541        default_severity: Severity::Allow,
14542        warn_since: None,
14543        deny_since: None,
14544    },
14545    Lint {
14546        label: "stdarch_riscv_feature_detection",
14547        description: r##"# `stdarch_riscv_feature_detection`
14548
14549
14550
14551The tracking issue for this feature is: [#111192]
14552
14553[#111192]: https://github.com/rust-lang/rust/issues/111192
14554
14555------------------------
14556"##,
14557        default_severity: Severity::Allow,
14558        warn_since: None,
14559        deny_since: None,
14560    },
14561    Lint {
14562        label: "stdio_fd_consts",
14563        description: r##"# `stdio_fd_consts`
14564
14565
14566
14567The tracking issue for this feature is: [#150836]
14568
14569[#150836]: https://github.com/rust-lang/rust/issues/150836
14570
14571------------------------
14572"##,
14573        default_severity: Severity::Allow,
14574        warn_since: None,
14575        deny_since: None,
14576    },
14577    Lint {
14578        label: "stdio_makes_pipe",
14579        description: r##"# `stdio_makes_pipe`
14580
14581
14582
14583The tracking issue for this feature is: [#98288]
14584
14585[#98288]: https://github.com/rust-lang/rust/issues/98288
14586
14587------------------------
14588"##,
14589        default_severity: Severity::Allow,
14590        warn_since: None,
14591        deny_since: None,
14592    },
14593    Lint {
14594        label: "stdio_swap",
14595        description: r##"# `stdio_swap`
14596
14597
14598
14599The tracking issue for this feature is: [#150667]
14600
14601[#150667]: https://github.com/rust-lang/rust/issues/150667
14602
14603------------------------
14604"##,
14605        default_severity: Severity::Allow,
14606        warn_since: None,
14607        deny_since: None,
14608    },
14609    Lint {
14610        label: "step_trait",
14611        description: r##"# `step_trait`
14612
14613
14614
14615The tracking issue for this feature is: [#42168]
14616
14617[#42168]: https://github.com/rust-lang/rust/issues/42168
14618
14619------------------------
14620"##,
14621        default_severity: Severity::Allow,
14622        warn_since: None,
14623        deny_since: None,
14624    },
14625    Lint {
14626        label: "stmt_expr_attributes",
14627        description: r##"# `stmt_expr_attributes`
14628
14629Allows attributes on expressions and non-item statements.
14630
14631The tracking issue for this feature is: [#15701]
14632
14633[#15701]: https://github.com/rust-lang/rust/issues/15701
14634
14635------------------------
14636"##,
14637        default_severity: Severity::Allow,
14638        warn_since: None,
14639        deny_since: None,
14640    },
14641    Lint {
14642        label: "str_as_str",
14643        description: r##"# `str_as_str`
14644
14645
14646
14647The tracking issue for this feature is: [#130366]
14648
14649[#130366]: https://github.com/rust-lang/rust/issues/130366
14650
14651------------------------
14652"##,
14653        default_severity: Severity::Allow,
14654        warn_since: None,
14655        deny_since: None,
14656    },
14657    Lint {
14658        label: "str_from_raw_parts",
14659        description: r##"# `str_from_raw_parts`
14660
14661
14662
14663The tracking issue for this feature is: [#119206]
14664
14665[#119206]: https://github.com/rust-lang/rust/issues/119206
14666
14667------------------------
14668"##,
14669        default_severity: Severity::Allow,
14670        warn_since: None,
14671        deny_since: None,
14672    },
14673    Lint {
14674        label: "str_from_utf16_endian",
14675        description: r##"# `str_from_utf16_endian`
14676
14677
14678
14679The tracking issue for this feature is: [#116258]
14680
14681[#116258]: https://github.com/rust-lang/rust/issues/116258
14682
14683------------------------
14684"##,
14685        default_severity: Severity::Allow,
14686        warn_since: None,
14687        deny_since: None,
14688    },
14689    Lint {
14690        label: "str_internals",
14691        description: r##"# `str_internals`
14692
14693This feature is internal to the Rust compiler and is not intended for general use.
14694
14695------------------------
14696"##,
14697        default_severity: Severity::Allow,
14698        warn_since: None,
14699        deny_since: None,
14700    },
14701    Lint {
14702        label: "str_lines_remainder",
14703        description: r##"# `str_lines_remainder`
14704
14705
14706
14707The tracking issue for this feature is: [#77998]
14708
14709[#77998]: https://github.com/rust-lang/rust/issues/77998
14710
14711------------------------
14712"##,
14713        default_severity: Severity::Allow,
14714        warn_since: None,
14715        deny_since: None,
14716    },
14717    Lint {
14718        label: "str_split_inclusive_remainder",
14719        description: r##"# `str_split_inclusive_remainder`
14720
14721
14722
14723The tracking issue for this feature is: [#77998]
14724
14725[#77998]: https://github.com/rust-lang/rust/issues/77998
14726
14727------------------------
14728"##,
14729        default_severity: Severity::Allow,
14730        warn_since: None,
14731        deny_since: None,
14732    },
14733    Lint {
14734        label: "str_split_remainder",
14735        description: r##"# `str_split_remainder`
14736
14737
14738
14739The tracking issue for this feature is: [#77998]
14740
14741[#77998]: https://github.com/rust-lang/rust/issues/77998
14742
14743------------------------
14744"##,
14745        default_severity: Severity::Allow,
14746        warn_since: None,
14747        deny_since: None,
14748    },
14749    Lint {
14750        label: "str_split_whitespace_remainder",
14751        description: r##"# `str_split_whitespace_remainder`
14752
14753
14754
14755The tracking issue for this feature is: [#77998]
14756
14757[#77998]: https://github.com/rust-lang/rust/issues/77998
14758
14759------------------------
14760"##,
14761        default_severity: Severity::Allow,
14762        warn_since: None,
14763        deny_since: None,
14764    },
14765    Lint {
14766        label: "strict_provenance_lints",
14767        description: r##"# `strict_provenance_lints`
14768
14769The tracking issue for this feature is: [#130351]
14770
14771[#130351]: https://github.com/rust-lang/rust/issues/130351
14772-----
14773
14774The `strict_provenance_lints` feature allows to enable the `fuzzy_provenance_casts` and `lossy_provenance_casts` lints.
14775These lint on casts between integers and pointers, that are recommended against or invalid in the strict provenance model.
14776
14777## Example
14778
14779```rust
14780#![feature(strict_provenance_lints)]
14781#![warn(fuzzy_provenance_casts)]
14782
14783fn main() {
14784    let _dangling = 16_usize as *const u8;
14785    //~^ WARNING: strict provenance disallows casting integer `usize` to pointer `*const u8`
14786}
14787```
14788"##,
14789        default_severity: Severity::Allow,
14790        warn_since: None,
14791        deny_since: None,
14792    },
14793    Lint {
14794        label: "string_from_utf8_lossy_owned",
14795        description: r##"# `string_from_utf8_lossy_owned`
14796
14797
14798
14799The tracking issue for this feature is: [#129436]
14800
14801[#129436]: https://github.com/rust-lang/rust/issues/129436
14802
14803------------------------
14804"##,
14805        default_severity: Severity::Allow,
14806        warn_since: None,
14807        deny_since: None,
14808    },
14809    Lint {
14810        label: "string_into_chars",
14811        description: r##"# `string_into_chars`
14812
14813
14814
14815The tracking issue for this feature is: [#133125]
14816
14817[#133125]: https://github.com/rust-lang/rust/issues/133125
14818
14819------------------------
14820"##,
14821        default_severity: Severity::Allow,
14822        warn_since: None,
14823        deny_since: None,
14824    },
14825    Lint {
14826        label: "string_remove_matches",
14827        description: r##"# `string_remove_matches`
14828
14829
14830
14831The tracking issue for this feature is: [#72826]
14832
14833[#72826]: https://github.com/rust-lang/rust/issues/72826
14834
14835------------------------
14836"##,
14837        default_severity: Severity::Allow,
14838        warn_since: None,
14839        deny_since: None,
14840    },
14841    Lint {
14842        label: "string_replace_in_place",
14843        description: r##"# `string_replace_in_place`
14844
14845
14846
14847The tracking issue for this feature is: [#147949]
14848
14849[#147949]: https://github.com/rust-lang/rust/issues/147949
14850
14851------------------------
14852"##,
14853        default_severity: Severity::Allow,
14854        warn_since: None,
14855        deny_since: None,
14856    },
14857    Lint {
14858        label: "strip_circumfix",
14859        description: r##"# `strip_circumfix`
14860
14861
14862
14863The tracking issue for this feature is: [#147946]
14864
14865[#147946]: https://github.com/rust-lang/rust/issues/147946
14866
14867------------------------
14868"##,
14869        default_severity: Severity::Allow,
14870        warn_since: None,
14871        deny_since: None,
14872    },
14873    Lint {
14874        label: "structural_match",
14875        description: r##"# `structural_match`
14876
14877Allows 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.
14878
14879The tracking issue for this feature is: [#31434]
14880
14881[#31434]: https://github.com/rust-lang/rust/issues/31434
14882
14883------------------------
14884"##,
14885        default_severity: Severity::Allow,
14886        warn_since: None,
14887        deny_since: None,
14888    },
14889    Lint {
14890        label: "substr_range",
14891        description: r##"# `substr_range`
14892
14893
14894
14895The tracking issue for this feature is: [#126769]
14896
14897[#126769]: https://github.com/rust-lang/rust/issues/126769
14898
14899------------------------
14900"##,
14901        default_severity: Severity::Allow,
14902        warn_since: None,
14903        deny_since: None,
14904    },
14905    Lint {
14906        label: "super_let",
14907        description: r##"# `super_let`
14908
14909Allows `super let` statements.
14910
14911The tracking issue for this feature is: [#139076]
14912
14913[#139076]: https://github.com/rust-lang/rust/issues/139076
14914
14915------------------------
14916"##,
14917        default_severity: Severity::Allow,
14918        warn_since: None,
14919        deny_since: None,
14920    },
14921    Lint {
14922        label: "supertrait_item_shadowing",
14923        description: r##"# `supertrait_item_shadowing`
14924
14925Allows subtrait items to shadow supertrait items.
14926
14927The tracking issue for this feature is: [#89151]
14928
14929[#89151]: https://github.com/rust-lang/rust/issues/89151
14930
14931------------------------
14932"##,
14933        default_severity: Severity::Allow,
14934        warn_since: None,
14935        deny_since: None,
14936    },
14937    Lint {
14938        label: "sync_nonpoison",
14939        description: r##"# `sync_nonpoison`
14940
14941
14942
14943The tracking issue for this feature is: [#134645]
14944
14945[#134645]: https://github.com/rust-lang/rust/issues/134645
14946
14947------------------------
14948"##,
14949        default_severity: Severity::Allow,
14950        warn_since: None,
14951        deny_since: None,
14952    },
14953    Lint {
14954        label: "sync_poison_mod",
14955        description: r##"# `sync_poison_mod`
14956
14957
14958
14959The tracking issue for this feature is: [#134646]
14960
14961[#134646]: https://github.com/rust-lang/rust/issues/134646
14962
14963------------------------
14964"##,
14965        default_severity: Severity::Allow,
14966        warn_since: None,
14967        deny_since: None,
14968    },
14969    Lint {
14970        label: "sync_unsafe_cell",
14971        description: r##"# `sync_unsafe_cell`
14972
14973
14974
14975The tracking issue for this feature is: [#95439]
14976
14977[#95439]: https://github.com/rust-lang/rust/issues/95439
14978
14979------------------------
14980"##,
14981        default_severity: Severity::Allow,
14982        warn_since: None,
14983        deny_since: None,
14984    },
14985    Lint {
14986        label: "tcp_deferaccept",
14987        description: r##"# `tcp_deferaccept`
14988
14989
14990
14991The tracking issue for this feature is: [#119639]
14992
14993[#119639]: https://github.com/rust-lang/rust/issues/119639
14994
14995------------------------
14996"##,
14997        default_severity: Severity::Allow,
14998        warn_since: None,
14999        deny_since: None,
15000    },
15001    Lint {
15002        label: "tcp_keepalive",
15003        description: r##"# `tcp_keepalive`
15004
15005
15006
15007The tracking issue for this feature is: [#155889]
15008
15009[#155889]: https://github.com/rust-lang/rust/issues/155889
15010
15011------------------------
15012"##,
15013        default_severity: Severity::Allow,
15014        warn_since: None,
15015        deny_since: None,
15016    },
15017    Lint {
15018        label: "tcp_linger",
15019        description: r##"# `tcp_linger`
15020
15021
15022
15023The tracking issue for this feature is: [#88494]
15024
15025[#88494]: https://github.com/rust-lang/rust/issues/88494
15026
15027------------------------
15028"##,
15029        default_severity: Severity::Allow,
15030        warn_since: None,
15031        deny_since: None,
15032    },
15033    Lint {
15034        label: "tcplistener_into_incoming",
15035        description: r##"# `tcplistener_into_incoming`
15036
15037
15038
15039The tracking issue for this feature is: [#88373]
15040
15041[#88373]: https://github.com/rust-lang/rust/issues/88373
15042
15043------------------------
15044"##,
15045        default_severity: Severity::Allow,
15046        warn_since: None,
15047        deny_since: None,
15048    },
15049    Lint {
15050        label: "temporary_niche_types",
15051        description: r##"# `temporary_niche_types`
15052
15053
15054
15055This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
15056
15057------------------------
15058"##,
15059        default_severity: Severity::Allow,
15060        warn_since: None,
15061        deny_since: None,
15062    },
15063    Lint {
15064        label: "test",
15065        description: r##"# `test`
15066
15067The tracking issue for this feature is: None.
15068
15069------------------------
15070
15071The internals of the `test` crate are unstable, behind the `test` flag.  The
15072most widely used part of the `test` crate are benchmark tests, which can test
15073the performance of your code.  Let's make our `src/lib.rs` look like this
15074(comments elided):
15075
15076```rust,no_run
15077#![feature(test)]
15078
15079extern crate test;
15080
15081pub fn add_two(a: i32) -> i32 {
15082    a + 2
15083}
15084
15085#[cfg(test)]
15086mod tests {
15087    use super::*;
15088    use test::Bencher;
15089
15090    #[test]
15091    fn it_works() {
15092        assert_eq!(4, add_two(2));
15093    }
15094
15095    #[bench]
15096    fn bench_add_two(b: &mut Bencher) {
15097        b.iter(|| add_two(2));
15098    }
15099}
15100```
15101
15102Note the `test` feature gate, which enables this unstable feature.
15103
15104We've imported the `test` crate, which contains our benchmarking support.
15105We have a new function as well, with the `bench` attribute. Unlike regular
15106tests, which take no arguments, benchmark tests take a `&mut Bencher`. This
15107`Bencher` provides an `iter` method, which takes a closure. This closure
15108contains the code we'd like to benchmark.
15109
15110We can run benchmark tests with `cargo bench`:
15111
15112```bash
15113$ cargo bench
15114   Compiling adder v0.0.1 (file:///home/steve/tmp/adder)
15115     Running target/release/adder-91b3e234d4ed382a
15116
15117running 2 tests
15118test tests::it_works ... ignored
15119test tests::bench_add_two ... bench:         1 ns/iter (+/- 0)
15120
15121test result: ok. 0 passed; 0 failed; 1 ignored; 1 measured
15122```
15123
15124Our non-benchmark test was ignored. You may have noticed that `cargo bench`
15125takes a bit longer than `cargo test`. This is because Rust runs our benchmark
15126a number of times, and then takes the average. Because we're doing so little
15127work in this example, we have a `1 ns/iter (+/- 0)`, but this would show
15128the variance if there was one.
15129
15130Advice on writing benchmarks:
15131
15132
15133* Move setup code outside the `iter` loop; only put the part you want to measure inside
15134* Make the code do "the same thing" on each iteration; do not accumulate or change state
15135* Make the outer function idempotent too; the benchmark runner is likely to run
15136  it many times
15137*  Make the inner `iter` loop short and fast so benchmark runs are fast and the
15138   calibrator can adjust the run-length at fine resolution
15139* Make the code in the `iter` loop do something simple, to assist in pinpointing
15140  performance improvements (or regressions)
15141
15142## Gotcha: optimizations
15143
15144There's another tricky part to writing benchmarks: benchmarks compiled with
15145optimizations activated can be dramatically changed by the optimizer so that
15146the benchmark is no longer benchmarking what one expects. For example, the
15147compiler might recognize that some calculation has no external effects and
15148remove it entirely.
15149
15150```rust,no_run
15151#![feature(test)]
15152
15153extern crate test;
15154use test::Bencher;
15155
15156#[bench]
15157fn bench_xor_1000_ints(b: &mut Bencher) {
15158    b.iter(|| {
15159        (0..1000).fold(0, |old, new| old ^ new);
15160    });
15161}
15162```
15163
15164gives the following results
15165
15166```text
15167running 1 test
15168test bench_xor_1000_ints ... bench:         0 ns/iter (+/- 0)
15169
15170test result: ok. 0 passed; 0 failed; 0 ignored; 1 measured
15171```
15172
15173The benchmarking runner offers two ways to avoid this. Either, the closure that
15174the `iter` method receives can return an arbitrary value which forces the
15175optimizer to consider the result used and ensures it cannot remove the
15176computation entirely. This could be done for the example above by adjusting the
15177`b.iter` call to
15178
15179```rust
15180# struct X;
15181# impl X { fn iter<T, F>(&self, _: F) where F: FnMut() -> T {} } let b = X;
15182b.iter(|| {
15183    // Note lack of `;` (could also use an explicit `return`).
15184    (0..1000).fold(0, |old, new| old ^ new)
15185});
15186```
15187
15188Or, the other option is to call the generic `test::black_box` function, which
15189is an opaque "black box" to the optimizer and so forces it to consider any
15190argument as used.
15191
15192```rust
15193#![feature(test)]
15194
15195extern crate test;
15196
15197# fn main() {
15198# struct X;
15199# impl X { fn iter<T, F>(&self, _: F) where F: FnMut() -> T {} } let b = X;
15200b.iter(|| {
15201    let n = test::black_box(1000);
15202
15203    (0..n).fold(0, |a, b| a ^ b)
15204})
15205# }
15206```
15207
15208Neither of these read or modify the value, and are very cheap for small values.
15209Larger values can be passed indirectly to reduce overhead (e.g.
15210`black_box(&huge_struct)`).
15211
15212Performing either of the above changes gives the following benchmarking results
15213
15214```text
15215running 1 test
15216test bench_xor_1000_ints ... bench:       131 ns/iter (+/- 3)
15217
15218test result: ok. 0 passed; 0 failed; 0 ignored; 1 measured
15219```
15220
15221However, the optimizer can still modify a testcase in an undesirable manner
15222even when using either of the above.
15223"##,
15224        default_severity: Severity::Allow,
15225        warn_since: None,
15226        deny_since: None,
15227    },
15228    Lint {
15229        label: "test_incomplete_feature",
15230        description: r##"# `test_incomplete_feature`
15231
15232Perma-unstable, only used to test the `incomplete_features` lint.
15233
15234This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
15235
15236------------------------
15237"##,
15238        default_severity: Severity::Allow,
15239        warn_since: None,
15240        deny_since: None,
15241    },
15242    Lint {
15243        label: "test_unstable_lint",
15244        description: r##"# `test_unstable_lint`
15245
15246Added for testing unstable lints; perma-unstable.
15247
15248This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
15249
15250------------------------
15251"##,
15252        default_severity: Severity::Allow,
15253        warn_since: None,
15254        deny_since: None,
15255    },
15256    Lint {
15257        label: "thin_box",
15258        description: r##"# `thin_box`
15259
15260
15261
15262The tracking issue for this feature is: [#92791]
15263
15264[#92791]: https://github.com/rust-lang/rust/issues/92791
15265
15266------------------------
15267"##,
15268        default_severity: Severity::Allow,
15269        warn_since: None,
15270        deny_since: None,
15271    },
15272    Lint {
15273        label: "thread_id_value",
15274        description: r##"# `thread_id_value`
15275
15276
15277
15278The tracking issue for this feature is: [#67939]
15279
15280[#67939]: https://github.com/rust-lang/rust/issues/67939
15281
15282------------------------
15283"##,
15284        default_severity: Severity::Allow,
15285        warn_since: None,
15286        deny_since: None,
15287    },
15288    Lint {
15289        label: "thread_local",
15290        description: r##"# `thread_local`
15291
15292Allows using `#[thread_local]` on `static` items.
15293
15294The tracking issue for this feature is: [#29594]
15295
15296[#29594]: https://github.com/rust-lang/rust/issues/29594
15297
15298------------------------
15299"##,
15300        default_severity: Severity::Allow,
15301        warn_since: None,
15302        deny_since: None,
15303    },
15304    Lint {
15305        label: "thread_local_internals",
15306        description: r##"# `thread_local_internals`
15307
15308This feature is internal to the Rust compiler and is not intended for general use.
15309
15310------------------------
15311"##,
15312        default_severity: Severity::Allow,
15313        warn_since: None,
15314        deny_since: None,
15315    },
15316    Lint {
15317        label: "thread_raw",
15318        description: r##"# `thread_raw`
15319
15320
15321
15322The tracking issue for this feature is: [#97523]
15323
15324[#97523]: https://github.com/rust-lang/rust/issues/97523
15325
15326------------------------
15327"##,
15328        default_severity: Severity::Allow,
15329        warn_since: None,
15330        deny_since: None,
15331    },
15332    Lint {
15333        label: "thread_sleep_until",
15334        description: r##"# `thread_sleep_until`
15335
15336
15337
15338The tracking issue for this feature is: [#113752]
15339
15340[#113752]: https://github.com/rust-lang/rust/issues/113752
15341
15342------------------------
15343"##,
15344        default_severity: Severity::Allow,
15345        warn_since: None,
15346        deny_since: None,
15347    },
15348    Lint {
15349        label: "thread_spawn_hook",
15350        description: r##"# `thread_spawn_hook`
15351
15352
15353
15354The tracking issue for this feature is: [#132951]
15355
15356[#132951]: https://github.com/rust-lang/rust/issues/132951
15357
15358------------------------
15359"##,
15360        default_severity: Severity::Allow,
15361        warn_since: None,
15362        deny_since: None,
15363    },
15364    Lint {
15365        label: "time_saturating_systemtime",
15366        description: r##"# `time_saturating_systemtime`
15367
15368
15369
15370The tracking issue for this feature is: [#151199]
15371
15372[#151199]: https://github.com/rust-lang/rust/issues/151199
15373
15374------------------------
15375"##,
15376        default_severity: Severity::Allow,
15377        warn_since: None,
15378        deny_since: None,
15379    },
15380    Lint {
15381        label: "time_systemtime_limits",
15382        description: r##"# `time_systemtime_limits`
15383
15384
15385
15386The tracking issue for this feature is: [#149067]
15387
15388[#149067]: https://github.com/rust-lang/rust/issues/149067
15389
15390------------------------
15391"##,
15392        default_severity: Severity::Allow,
15393        warn_since: None,
15394        deny_since: None,
15395    },
15396    Lint {
15397        label: "titlecase",
15398        description: r##"# `titlecase`
15399
15400
15401
15402The tracking issue for this feature is: [#153892]
15403
15404[#153892]: https://github.com/rust-lang/rust/issues/153892
15405
15406------------------------
15407"##,
15408        default_severity: Severity::Allow,
15409        warn_since: None,
15410        deny_since: None,
15411    },
15412    Lint {
15413        label: "trace_macros",
15414        description: r##"# `trace_macros`
15415
15416The tracking issue for this feature is [#29598].
15417
15418[#29598]: https://github.com/rust-lang/rust/issues/29598
15419
15420------------------------
15421
15422With `trace_macros` you can trace the expansion of macros in your code.
15423
15424## Examples
15425
15426```rust
15427#![feature(trace_macros)]
15428
15429fn main() {
15430    trace_macros!(true);
15431    println!("Hello, Rust!");
15432    trace_macros!(false);
15433}
15434```
15435
15436The `cargo build` output:
15437
15438```txt
15439note: trace_macro
15440 --> src/main.rs:5:5
15441  |
154425 |     println!("Hello, Rust!");
15443  |     ^^^^^^^^^^^^^^^^^^^^^^^^^
15444  |
15445  = note: expanding `println! { "Hello, Rust!" }`
15446  = note: to `print ! ( concat ! ( "Hello, Rust!" , "\n" ) )`
15447  = note: expanding `print! { concat ! ( "Hello, Rust!" , "\n" ) }`
15448  = note: to `$crate :: io :: _print ( format_args ! ( concat ! ( "Hello, Rust!" , "\n" ) )
15449          )`
15450
15451    Finished dev [unoptimized + debuginfo] target(s) in 0.60 secs
15452```
15453"##,
15454        default_severity: Severity::Allow,
15455        warn_since: None,
15456        deny_since: None,
15457    },
15458    Lint {
15459        label: "trait_alias",
15460        description: r##"# `trait_alias`
15461
15462The tracking issue for this feature is: [#41517]
15463
15464[#41517]: https://github.com/rust-lang/rust/issues/41517
15465
15466------------------------
15467
15468The `trait_alias` feature adds support for trait aliases. These allow aliases
15469to be created for one or more traits (currently just a single regular trait plus
15470any number of auto-traits), and used wherever traits would normally be used as
15471either bounds or trait objects.
15472
15473```rust
15474#![feature(trait_alias)]
15475
15476trait Foo = std::fmt::Debug + Send;
15477trait Bar = Foo + Sync;
15478
15479// Use trait alias as bound on type parameter.
15480fn foo<T: Foo>(v: &T) {
15481    println!("{:?}", v);
15482}
15483
15484pub fn main() {
15485    foo(&1);
15486
15487    // Use trait alias for trait objects.
15488    let a: &dyn Bar = &123;
15489    println!("{:?}", a);
15490    let b = Box::new(456) as Box<dyn Foo>;
15491    println!("{:?}", b);
15492}
15493```
15494"##,
15495        default_severity: Severity::Allow,
15496        warn_since: None,
15497        deny_since: None,
15498    },
15499    Lint {
15500        label: "transmutability",
15501        description: r##"# `transmutability`
15502
15503
15504
15505The tracking issue for this feature is: [#99571]
15506
15507[#99571]: https://github.com/rust-lang/rust/issues/99571
15508
15509------------------------
15510"##,
15511        default_severity: Severity::Allow,
15512        warn_since: None,
15513        deny_since: None,
15514    },
15515    Lint {
15516        label: "transmute_generic_consts",
15517        description: r##"# `transmute_generic_consts`
15518
15519Allows for transmuting between arrays with sizes that contain generic consts.
15520
15521The tracking issue for this feature is: [#109929]
15522
15523[#109929]: https://github.com/rust-lang/rust/issues/109929
15524
15525------------------------
15526"##,
15527        default_severity: Severity::Allow,
15528        warn_since: None,
15529        deny_since: None,
15530    },
15531    Lint {
15532        label: "transmute_neo",
15533        description: r##"# `transmute_neo`
15534
15535
15536
15537The tracking issue for this feature is: [#155079]
15538
15539[#155079]: https://github.com/rust-lang/rust/issues/155079
15540
15541------------------------
15542"##,
15543        default_severity: Severity::Allow,
15544        warn_since: None,
15545        deny_since: None,
15546    },
15547    Lint {
15548        label: "transmute_prefix",
15549        description: r##"# `transmute_prefix`
15550
15551
15552
15553The tracking issue for this feature is: [#155079]
15554
15555[#155079]: https://github.com/rust-lang/rust/issues/155079
15556
15557------------------------
15558"##,
15559        default_severity: Severity::Allow,
15560        warn_since: None,
15561        deny_since: None,
15562    },
15563    Lint {
15564        label: "transparent_unions",
15565        description: r##"# `transparent_unions`
15566
15567The tracking issue for this feature is [#60405]
15568
15569[#60405]: https://github.com/rust-lang/rust/issues/60405
15570
15571----
15572
15573The `transparent_unions` feature allows you mark `union`s as
15574`#[repr(transparent)]`. A `union` may be `#[repr(transparent)]` in exactly the
15575same conditions in which a `struct` may be `#[repr(transparent)]` (generally,
15576this means the `union` must have exactly one non-zero-sized field). Some
15577concrete illustrations follow.
15578
15579```rust
15580#![feature(transparent_unions)]
15581
15582// This union has the same representation as `f32`.
15583#[repr(transparent)]
15584union SingleFieldUnion {
15585    field: f32,
15586}
15587
15588// This union has the same representation as `usize`.
15589#[repr(transparent)]
15590union MultiFieldUnion {
15591    field: usize,
15592    nothing: (),
15593}
15594```
15595
15596For consistency with transparent `struct`s, `union`s must have exactly one
15597non-zero-sized field. If all fields are zero-sized, the `union` must not be
15598`#[repr(transparent)]`:
15599
15600```rust
15601#![feature(transparent_unions)]
15602
15603// This (non-transparent) union is already valid in stable Rust:
15604pub union GoodUnion {
15605    pub nothing: (),
15606}
15607
15608// Error: transparent union needs exactly one non-zero-sized field, but has 0
15609// #[repr(transparent)]
15610// pub union BadUnion {
15611//     pub nothing: (),
15612// }
15613```
15614
15615The one exception is if the `union` is generic over `T` and has a field of type
15616`T`, it may be `#[repr(transparent)]` even if `T` is a zero-sized type:
15617
15618```rust
15619#![feature(transparent_unions)]
15620
15621// This union has the same representation as `T`.
15622#[repr(transparent)]
15623pub union GenericUnion<T: Copy> { // Unions with non-`Copy` fields are unstable.
15624    pub field: T,
15625    pub nothing: (),
15626}
15627
15628// This is okay even though `()` is a zero-sized type.
15629pub const THIS_IS_OKAY: GenericUnion<()> = GenericUnion { field: () };
15630```
15631
15632Like transparent `struct`s, a transparent `union` of type `U` has the same
15633layout, size, and ABI as its single non-ZST field. If it is generic over a type
15634`T`, and all its fields are ZSTs except for exactly one field of type `T`, then
15635it has the same layout and ABI as `T` (even if `T` is a ZST when monomorphized).
15636
15637Like transparent `struct`s, transparent `union`s are FFI-safe if and only if
15638their underlying representation type is also FFI-safe.
15639
15640A `union` may not be eligible for the same nonnull-style optimizations that a
15641`struct` or `enum` (with the same fields) are eligible for. Adding
15642`#[repr(transparent)]` to  `union` does not change this. To give a more concrete
15643example, it is unspecified whether `size_of::<T>()` is equal to
15644`size_of::<Option<T>>()`, where `T` is a `union` (regardless of whether or not
15645it is transparent). The Rust compiler is free to perform this optimization if
15646possible, but is not required to, and different compiler versions may differ in
15647their application of these optimizations.
15648"##,
15649        default_severity: Severity::Allow,
15650        warn_since: None,
15651        deny_since: None,
15652    },
15653    Lint {
15654        label: "trim_prefix_suffix",
15655        description: r##"# `trim_prefix_suffix`
15656
15657
15658
15659The tracking issue for this feature is: [#142312]
15660
15661[#142312]: https://github.com/rust-lang/rust/issues/142312
15662
15663------------------------
15664"##,
15665        default_severity: Severity::Allow,
15666        warn_since: None,
15667        deny_since: None,
15668    },
15669    Lint {
15670        label: "trivial_bounds",
15671        description: r##"# `trivial_bounds`
15672
15673Allows inconsistent bounds in where clauses.
15674
15675The tracking issue for this feature is: [#48214]
15676
15677[#48214]: https://github.com/rust-lang/rust/issues/48214
15678
15679------------------------
15680"##,
15681        default_severity: Severity::Allow,
15682        warn_since: None,
15683        deny_since: None,
15684    },
15685    Lint {
15686        label: "trivial_clone",
15687        description: r##"# `trivial_clone`
15688
15689
15690
15691This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
15692
15693------------------------
15694"##,
15695        default_severity: Severity::Allow,
15696        warn_since: None,
15697        deny_since: None,
15698    },
15699    Lint {
15700        label: "trusted_fused",
15701        description: r##"# `trusted_fused`
15702
15703
15704
15705This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
15706
15707------------------------
15708"##,
15709        default_severity: Severity::Allow,
15710        warn_since: None,
15711        deny_since: None,
15712    },
15713    Lint {
15714        label: "trusted_len",
15715        description: r##"# `trusted_len`
15716
15717
15718
15719The tracking issue for this feature is: [#37572]
15720
15721[#37572]: https://github.com/rust-lang/rust/issues/37572
15722
15723------------------------
15724"##,
15725        default_severity: Severity::Allow,
15726        warn_since: None,
15727        deny_since: None,
15728    },
15729    Lint {
15730        label: "trusted_random_access",
15731        description: r##"# `trusted_random_access`
15732
15733
15734
15735This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
15736
15737------------------------
15738"##,
15739        default_severity: Severity::Allow,
15740        warn_since: None,
15741        deny_since: None,
15742    },
15743    Lint {
15744        label: "trusted_step",
15745        description: r##"# `trusted_step`
15746
15747
15748
15749The tracking issue for this feature is: [#85731]
15750
15751[#85731]: https://github.com/rust-lang/rust/issues/85731
15752
15753------------------------
15754"##,
15755        default_severity: Severity::Allow,
15756        warn_since: None,
15757        deny_since: None,
15758    },
15759    Lint {
15760        label: "try_as_dyn",
15761        description: r##"# `try_as_dyn`
15762
15763
15764
15765The tracking issue for this feature is: [#144361]
15766
15767[#144361]: https://github.com/rust-lang/rust/issues/144361
15768
15769------------------------
15770"##,
15771        default_severity: Severity::Allow,
15772        warn_since: None,
15773        deny_since: None,
15774    },
15775    Lint {
15776        label: "try_blocks",
15777        description: r##"# `try_blocks`
15778
15779The tracking issue for this feature is: [#154391]
15780
15781[#154391]: https://github.com/rust-lang/rust/issues/154391
15782
15783------------------------
15784
15785The `try_blocks` feature adds support for `try` blocks. A `try`
15786block creates a new scope one can use the `?` operator in.
15787
15788```rust,edition2018
15789#![feature(try_blocks)]
15790
15791use std::num::ParseIntError;
15792
15793let result = try {
15794    "1".parse::<i32>()?
15795        + "2".parse::<i32>()?
15796        + "3".parse::<i32>()?
15797};
15798assert_eq!(result, Ok(6));
15799
15800let result = try {
15801    "1".parse::<i32>()?
15802        + "foo".parse::<i32>()?
15803        + "3".parse::<i32>()?
15804};
15805assert!(result.is_err());
15806```
15807"##,
15808        default_severity: Severity::Allow,
15809        warn_since: None,
15810        deny_since: None,
15811    },
15812    Lint {
15813        label: "try_blocks_heterogeneous",
15814        description: r##"# `try_blocks_heterogeneous`
15815
15816Allows using `try bikeshed TargetType {...}` expressions.
15817
15818The tracking issue for this feature is: [#149488]
15819
15820[#149488]: https://github.com/rust-lang/rust/issues/149488
15821
15822------------------------
15823"##,
15824        default_severity: Severity::Allow,
15825        warn_since: None,
15826        deny_since: None,
15827    },
15828    Lint {
15829        label: "try_find",
15830        description: r##"# `try_find`
15831
15832
15833
15834The tracking issue for this feature is: [#63178]
15835
15836[#63178]: https://github.com/rust-lang/rust/issues/63178
15837
15838------------------------
15839"##,
15840        default_severity: Severity::Allow,
15841        warn_since: None,
15842        deny_since: None,
15843    },
15844    Lint {
15845        label: "try_from_int_error_kind",
15846        description: r##"# `try_from_int_error_kind`
15847
15848
15849
15850The tracking issue for this feature is: [#153978]
15851
15852[#153978]: https://github.com/rust-lang/rust/issues/153978
15853
15854------------------------
15855"##,
15856        default_severity: Severity::Allow,
15857        warn_since: None,
15858        deny_since: None,
15859    },
15860    Lint {
15861        label: "try_reserve_kind",
15862        description: r##"# `try_reserve_kind`
15863
15864
15865
15866The tracking issue for this feature is: [#48043]
15867
15868[#48043]: https://github.com/rust-lang/rust/issues/48043
15869
15870------------------------
15871"##,
15872        default_severity: Severity::Allow,
15873        warn_since: None,
15874        deny_since: None,
15875    },
15876    Lint {
15877        label: "try_trait_v2",
15878        description: r##"# `try_trait_v2`
15879
15880
15881
15882The tracking issue for this feature is: [#84277]
15883
15884[#84277]: https://github.com/rust-lang/rust/issues/84277
15885
15886------------------------
15887"##,
15888        default_severity: Severity::Allow,
15889        warn_since: None,
15890        deny_since: None,
15891    },
15892    Lint {
15893        label: "try_trait_v2_residual",
15894        description: r##"# `try_trait_v2_residual`
15895
15896
15897
15898The tracking issue for this feature is: [#91285]
15899
15900[#91285]: https://github.com/rust-lang/rust/issues/91285
15901
15902------------------------
15903"##,
15904        default_severity: Severity::Allow,
15905        warn_since: None,
15906        deny_since: None,
15907    },
15908    Lint {
15909        label: "try_trait_v2_yeet",
15910        description: r##"# `try_trait_v2_yeet`
15911
15912
15913
15914The tracking issue for this feature is: [#96374]
15915
15916[#96374]: https://github.com/rust-lang/rust/issues/96374
15917
15918------------------------
15919"##,
15920        default_severity: Severity::Allow,
15921        warn_since: None,
15922        deny_since: None,
15923    },
15924    Lint {
15925        label: "try_with_capacity",
15926        description: r##"# `try_with_capacity`
15927
15928
15929
15930The tracking issue for this feature is: [#91913]
15931
15932[#91913]: https://github.com/rust-lang/rust/issues/91913
15933
15934------------------------
15935"##,
15936        default_severity: Severity::Allow,
15937        warn_since: None,
15938        deny_since: None,
15939    },
15940    Lint {
15941        label: "tuple_trait",
15942        description: r##"# `tuple_trait`
15943
15944
15945
15946This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
15947
15948------------------------
15949"##,
15950        default_severity: Severity::Allow,
15951        warn_since: None,
15952        deny_since: None,
15953    },
15954    Lint {
15955        label: "type_alias_impl_trait",
15956        description: r##"# `type_alias_impl_trait`
15957
15958The tracking issue for this feature is: [#63063]
15959
15960------------------------
15961
15962> This feature is not to be confused with [`trait_alias`] or [`impl_trait_in_assoc_type`].
15963
15964### What is `impl Trait`?
15965
15966`impl Trait` in return position is useful for declaring types that are constrained by traits, but whose concrete type should be hidden:
15967
15968```rust
15969use std::fmt::Debug;
15970
15971fn new() -> impl Debug {
15972    42
15973}
15974
15975fn main() {
15976    let thing = new();
15977    // What actually is a `thing`?
15978    // No idea but we know it implements `Debug`, so we can debug print it
15979    println!("{thing:?}");
15980}
15981```
15982
15983See the [reference] for more information about `impl Trait` in return position.
15984
15985### `type_alias_impl_trait`
15986
15987However, we might want to use an `impl Trait` in multiple locations but actually use the same concrete type everywhere while keeping it hidden.
15988This can be useful in libraries where you want to hide implementation details.
15989
15990The `#[define_opaque]` attribute must be used to explicitly list opaque items constrained by the item it's on.
15991
15992```rust
15993#![feature(type_alias_impl_trait)]
15994# #![allow(unused_variables, dead_code)]
15995trait Trait {}
15996
15997struct MyType;
15998
15999impl Trait for MyType {}
16000
16001type Alias = impl Trait;
16002
16003#[define_opaque(Alias)] // To constrain the type alias to `MyType`
16004fn new() -> Alias {
16005    MyType
16006}
16007
16008#[define_opaque(Alias)] // So we can name the concrete type inside this item
16009fn main() {
16010    let thing: MyType = new();
16011}
16012
16013// It can be a part of a struct too
16014struct HaveAlias {
16015    stuff: String,
16016    thing: Alias,
16017}
16018```
16019
16020In this example, the concrete type referred to by `Alias` is guaranteed to be the same wherever `Alias` occurs.
16021
16022> 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`].
16023
16024### `type_alias_impl_trait` in argument position.
16025
16026Note 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.
16027
16028```rust
16029# #![feature(type_alias_impl_trait)]
16030# #![allow(unused_variables)]
16031# pub mod x {
16032# pub trait Trait {}
16033#
16034# struct MyType;
16035#
16036# impl Trait for MyType {}
16037#
16038# pub type Alias = impl Trait;
16039#
16040# #[define_opaque(Alias)]
16041# pub fn new() -> Alias {
16042#     MyType
16043# }
16044# }
16045# use x::*;
16046// this...
16047pub fn take_alias(x: Alias) {
16048    // ...
16049}
16050
16051// ...is *not* the same as
16052pub fn take_impl(x: impl Trait) {
16053    // ...
16054}
16055# fn main(){}
16056```
16057
16058```rust,compile_fail,E0308
16059# #![feature(type_alias_impl_trait)]
16060# #![allow(unused_variables)]
16061# pub mod x {
16062# pub trait Trait {}
16063#
16064# struct MyType;
16065#
16066# impl Trait for MyType {}
16067#
16068# pub type Alias = impl Trait;
16069#
16070# #[define_opaque(Alias)]
16071# pub fn new() -> Alias {
16072#     MyType
16073# }
16074# }
16075# use x::*;
16076# pub fn take_alias(x: Alias) {
16077#     // ...
16078# }
16079#
16080# pub fn take_impl(x: impl Trait) {
16081#    // ...
16082# }
16083#
16084// a user's crate using the trait and type alias
16085struct UserType;
16086impl Trait for UserType {}
16087
16088# fn main(){
16089let x = UserType;
16090take_alias(x);
16091// ERROR expected opaque type, found `UserType`
16092// this function *actually* takes a `MyType` as is constrained in `new`
16093
16094let x = UserType;
16095take_impl(x);
16096// OK
16097
16098let x = new();
16099take_alias(x);
16100// OK
16101
16102let x = new();
16103take_impl(x);
16104// OK
16105# }
16106```
16107
16108Note 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`".
16109
16110[#63063]: https://github.com/rust-lang/rust/issues/63063
16111[#110237]: https://github.com/rust-lang/rust/pull/110237
16112[reference]: https://doc.rust-lang.org/stable/reference/types/impl-trait.html#abstract-return-types
16113[`trait_alias`]: ./trait-alias.md
16114[`impl_trait_in_assoc_type`]: ./impl-trait-in-assoc-type.md
16115"##,
16116        default_severity: Severity::Allow,
16117        warn_since: None,
16118        deny_since: None,
16119    },
16120    Lint {
16121        label: "type_ascription",
16122        description: r##"# `type_ascription`
16123
16124
16125
16126The tracking issue for this feature is: [#23416]
16127
16128[#23416]: https://github.com/rust-lang/rust/issues/23416
16129
16130------------------------
16131"##,
16132        default_severity: Severity::Allow,
16133        warn_since: None,
16134        deny_since: None,
16135    },
16136    Lint {
16137        label: "type_changing_struct_update",
16138        description: r##"# `type_changing_struct_update`
16139
16140The tracking issue for this feature is: [#86555]
16141
16142[#86555]: https://github.com/rust-lang/rust/issues/86555
16143
16144------------------------
16145
16146This implements [RFC2528]. When turned on, you can create instances of the same struct
16147that have different generic type or lifetime parameters.
16148
16149[RFC2528]: https://github.com/rust-lang/rfcs/blob/master/text/2528-type-changing-struct-update-syntax.md
16150
16151```rust
16152#![allow(unused_variables, dead_code)]
16153#![feature(type_changing_struct_update)]
16154
16155fn main () {
16156    struct Foo<T, U> {
16157        field1: T,
16158        field2: U,
16159    }
16160
16161    let base: Foo<String, i32> = Foo {
16162        field1: String::from("hello"),
16163        field2: 1234,
16164    };
16165    let updated: Foo<f64, i32> = Foo {
16166        field1: 3.14,
16167        ..base
16168    };
16169}
16170```
16171"##,
16172        default_severity: Severity::Allow,
16173        warn_since: None,
16174        deny_since: None,
16175    },
16176    Lint {
16177        label: "type_info",
16178        description: r##"# `type_info`
16179
16180
16181
16182The tracking issue for this feature is: [#146922]
16183
16184[#146922]: https://github.com/rust-lang/rust/issues/146922
16185
16186------------------------
16187"##,
16188        default_severity: Severity::Allow,
16189        warn_since: None,
16190        deny_since: None,
16191    },
16192    Lint {
16193        label: "ub_checks",
16194        description: r##"# `ub_checks`
16195
16196
16197
16198This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
16199
16200------------------------
16201"##,
16202        default_severity: Severity::Allow,
16203        warn_since: None,
16204        deny_since: None,
16205    },
16206    Lint {
16207        label: "uefi_std",
16208        description: r##"# `uefi_std`
16209
16210
16211
16212The tracking issue for this feature is: [#100499]
16213
16214[#100499]: https://github.com/rust-lang/rust/issues/100499
16215
16216------------------------
16217"##,
16218        default_severity: Severity::Allow,
16219        warn_since: None,
16220        deny_since: None,
16221    },
16222    Lint {
16223        label: "uint_carryless_mul",
16224        description: r##"# `uint_carryless_mul`
16225
16226
16227
16228The tracking issue for this feature is: [#152080]
16229
16230[#152080]: https://github.com/rust-lang/rust/issues/152080
16231
16232------------------------
16233"##,
16234        default_severity: Severity::Allow,
16235        warn_since: None,
16236        deny_since: None,
16237    },
16238    Lint {
16239        label: "uint_gather_scatter_bits",
16240        description: r##"# `uint_gather_scatter_bits`
16241
16242
16243
16244The tracking issue for this feature is: [#149069]
16245
16246[#149069]: https://github.com/rust-lang/rust/issues/149069
16247
16248------------------------
16249"##,
16250        default_severity: Severity::Allow,
16251        warn_since: None,
16252        deny_since: None,
16253    },
16254    Lint {
16255        label: "unboxed_closures",
16256        description: r##"# `unboxed_closures`
16257
16258The tracking issue for this feature is [#29625]
16259
16260See Also: [`fn_traits`](../library-features/fn-traits.md)
16261
16262[#29625]: https://github.com/rust-lang/rust/issues/29625
16263
16264----
16265
16266The `unboxed_closures` feature allows you to write functions using the `"rust-call"` ABI,
16267required for implementing the [`Fn*`] family of traits. `"rust-call"` functions must have
16268exactly one (non self) argument, a tuple representing the argument list.
16269
16270[`Fn*`]: ../../std/ops/trait.Fn.html
16271
16272```rust
16273#![feature(unboxed_closures)]
16274
16275extern "rust-call" fn add_args(args: (u32, u32)) -> u32 {
16276    args.0 + args.1
16277}
16278
16279fn main() {}
16280```
16281"##,
16282        default_severity: Severity::Allow,
16283        warn_since: None,
16284        deny_since: None,
16285    },
16286    Lint {
16287        label: "unicode_internals",
16288        description: r##"# `unicode_internals`
16289
16290
16291
16292This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
16293
16294------------------------
16295"##,
16296        default_severity: Severity::Allow,
16297        warn_since: None,
16298        deny_since: None,
16299    },
16300    Lint {
16301        label: "unique_rc_arc",
16302        description: r##"# `unique_rc_arc`
16303
16304
16305
16306The tracking issue for this feature is: [#112566]
16307
16308[#112566]: https://github.com/rust-lang/rust/issues/112566
16309
16310------------------------
16311"##,
16312        default_severity: Severity::Allow,
16313        warn_since: None,
16314        deny_since: None,
16315    },
16316    Lint {
16317        label: "unix_file_vectored_at",
16318        description: r##"# `unix_file_vectored_at`
16319
16320
16321
16322The tracking issue for this feature is: [#89517]
16323
16324[#89517]: https://github.com/rust-lang/rust/issues/89517
16325
16326------------------------
16327"##,
16328        default_severity: Severity::Allow,
16329        warn_since: None,
16330        deny_since: None,
16331    },
16332    Lint {
16333        label: "unix_kill_process_group",
16334        description: r##"# `unix_kill_process_group`
16335
16336
16337
16338The tracking issue for this feature is: [#156537]
16339
16340[#156537]: https://github.com/rust-lang/rust/issues/156537
16341
16342------------------------
16343"##,
16344        default_severity: Severity::Allow,
16345        warn_since: None,
16346        deny_since: None,
16347    },
16348    Lint {
16349        label: "unix_mkfifo",
16350        description: r##"# `unix_mkfifo`
16351
16352
16353
16354The tracking issue for this feature is: [#139324]
16355
16356[#139324]: https://github.com/rust-lang/rust/issues/139324
16357
16358------------------------
16359"##,
16360        default_severity: Severity::Allow,
16361        warn_since: None,
16362        deny_since: None,
16363    },
16364    Lint {
16365        label: "unix_send_signal",
16366        description: r##"# `unix_send_signal`
16367
16368
16369
16370The tracking issue for this feature is: [#141975]
16371
16372[#141975]: https://github.com/rust-lang/rust/issues/141975
16373
16374------------------------
16375"##,
16376        default_severity: Severity::Allow,
16377        warn_since: None,
16378        deny_since: None,
16379    },
16380    Lint {
16381        label: "unix_set_mark",
16382        description: r##"# `unix_set_mark`
16383
16384
16385
16386The tracking issue for this feature is: [#96467]
16387
16388[#96467]: https://github.com/rust-lang/rust/issues/96467
16389
16390------------------------
16391"##,
16392        default_severity: Severity::Allow,
16393        warn_since: None,
16394        deny_since: None,
16395    },
16396    Lint {
16397        label: "unix_socket_ancillary_data",
16398        description: r##"# `unix_socket_ancillary_data`
16399
16400
16401
16402The tracking issue for this feature is: [#76915]
16403
16404[#76915]: https://github.com/rust-lang/rust/issues/76915
16405
16406------------------------
16407"##,
16408        default_severity: Severity::Allow,
16409        warn_since: None,
16410        deny_since: None,
16411    },
16412    Lint {
16413        label: "unix_socket_exclbind",
16414        description: r##"# `unix_socket_exclbind`
16415
16416
16417
16418The tracking issue for this feature is: [#123481]
16419
16420[#123481]: https://github.com/rust-lang/rust/issues/123481
16421
16422------------------------
16423"##,
16424        default_severity: Severity::Allow,
16425        warn_since: None,
16426        deny_since: None,
16427    },
16428    Lint {
16429        label: "unix_socket_peek",
16430        description: r##"# `unix_socket_peek`
16431
16432
16433
16434The tracking issue for this feature is: [#76923]
16435
16436[#76923]: https://github.com/rust-lang/rust/issues/76923
16437
16438------------------------
16439"##,
16440        default_severity: Severity::Allow,
16441        warn_since: None,
16442        deny_since: None,
16443    },
16444    Lint {
16445        label: "unnamed_enum_variants",
16446        description: r##"# `unnamed_enum_variants`
16447
16448Allows using `_ = <range-or-int>` enum variants.
16449
16450The tracking issue for this feature is: [#156628]
16451
16452[#156628]: https://github.com/rust-lang/rust/issues/156628
16453
16454------------------------
16455"##,
16456        default_severity: Severity::Allow,
16457        warn_since: None,
16458        deny_since: None,
16459    },
16460    Lint {
16461        label: "unqualified_local_imports",
16462        description: r##"# `unqualified_local_imports`
16463
16464Helps with formatting for `group_imports = "StdExternalCrate"`.
16465
16466The tracking issue for this feature is: [#138299]
16467
16468[#138299]: https://github.com/rust-lang/rust/issues/138299
16469
16470------------------------
16471"##,
16472        default_severity: Severity::Allow,
16473        warn_since: None,
16474        deny_since: None,
16475    },
16476    Lint {
16477        label: "unsafe_binders",
16478        description: r##"# `unsafe_binders`
16479
16480Allows using `unsafe<'a> &'a T` unsafe binder types.
16481
16482The tracking issue for this feature is: [#130516]
16483
16484[#130516]: https://github.com/rust-lang/rust/issues/130516
16485
16486------------------------
16487"##,
16488        default_severity: Severity::Allow,
16489        warn_since: None,
16490        deny_since: None,
16491    },
16492    Lint {
16493        label: "unsafe_cell_access",
16494        description: r##"# `unsafe_cell_access`
16495
16496
16497
16498The tracking issue for this feature is: [#136327]
16499
16500[#136327]: https://github.com/rust-lang/rust/issues/136327
16501
16502------------------------
16503"##,
16504        default_severity: Severity::Allow,
16505        warn_since: None,
16506        deny_since: None,
16507    },
16508    Lint {
16509        label: "unsafe_fields",
16510        description: r##"# `unsafe_fields`
16511
16512Allows declaring fields `unsafe`.
16513
16514The tracking issue for this feature is: [#132922]
16515
16516[#132922]: https://github.com/rust-lang/rust/issues/132922
16517
16518------------------------
16519"##,
16520        default_severity: Severity::Allow,
16521        warn_since: None,
16522        deny_since: None,
16523    },
16524    Lint {
16525        label: "unsafe_pinned",
16526        description: r##"# `unsafe_pinned`
16527
16528
16529
16530The tracking issue for this feature is: [#125735]
16531
16532[#125735]: https://github.com/rust-lang/rust/issues/125735
16533
16534------------------------
16535"##,
16536        default_severity: Severity::Allow,
16537        warn_since: None,
16538        deny_since: None,
16539    },
16540    Lint {
16541        label: "unsafe_unpin",
16542        description: r##"# `unsafe_unpin`
16543
16544
16545
16546The tracking issue for this feature is: [#125735]
16547
16548[#125735]: https://github.com/rust-lang/rust/issues/125735
16549
16550------------------------
16551"##,
16552        default_severity: Severity::Allow,
16553        warn_since: None,
16554        deny_since: None,
16555    },
16556    Lint {
16557        label: "unsize",
16558        description: r##"# `unsize`
16559
16560
16561
16562The tracking issue for this feature is: [#18598]
16563
16564[#18598]: https://github.com/rust-lang/rust/issues/18598
16565
16566------------------------
16567"##,
16568        default_severity: Severity::Allow,
16569        warn_since: None,
16570        deny_since: None,
16571    },
16572    Lint {
16573        label: "unsized_const_params",
16574        description: r##"# `unsized_const_params`
16575
16576Allows const generic parameters to be defined with types that are not `Sized`, e.g. `fn foo<const N: [u8]>() {`.
16577
16578The tracking issue for this feature is: [#95174]
16579
16580[#95174]: https://github.com/rust-lang/rust/issues/95174
16581
16582------------------------
16583"##,
16584        default_severity: Severity::Allow,
16585        warn_since: None,
16586        deny_since: None,
16587    },
16588    Lint {
16589        label: "unsized_fn_params",
16590        description: r##"# `unsized_fn_params`
16591
16592Allows unsized fn parameters.
16593
16594The tracking issue for this feature is: [#48055]
16595
16596[#48055]: https://github.com/rust-lang/rust/issues/48055
16597
16598------------------------
16599"##,
16600        default_severity: Severity::Allow,
16601        warn_since: None,
16602        deny_since: None,
16603    },
16604    Lint {
16605        label: "unwrap_infallible",
16606        description: r##"# `unwrap_infallible`
16607
16608
16609
16610The tracking issue for this feature is: [#61695]
16611
16612[#61695]: https://github.com/rust-lang/rust/issues/61695
16613
16614------------------------
16615"##,
16616        default_severity: Severity::Allow,
16617        warn_since: None,
16618        deny_since: None,
16619    },
16620    Lint {
16621        label: "update_panic_count",
16622        description: r##"# `update_panic_count`
16623
16624This feature is internal to the Rust compiler and is not intended for general use.
16625
16626------------------------
16627"##,
16628        default_severity: Severity::Allow,
16629        warn_since: None,
16630        deny_since: None,
16631    },
16632    Lint {
16633        label: "used_with_arg",
16634        description: r##"# `used_with_arg`
16635
16636Allows using the `#[used(linker)]` (or `#[used(compiler)]`) attribute.
16637
16638The tracking issue for this feature is: [#93798]
16639
16640[#93798]: https://github.com/rust-lang/rust/issues/93798
16641
16642------------------------
16643"##,
16644        default_severity: Severity::Allow,
16645        warn_since: None,
16646        deny_since: None,
16647    },
16648    Lint {
16649        label: "utf16_extra",
16650        description: r##"# `utf16_extra`
16651
16652
16653
16654The tracking issue for this feature is: [#94919]
16655
16656[#94919]: https://github.com/rust-lang/rust/issues/94919
16657
16658------------------------
16659"##,
16660        default_severity: Severity::Allow,
16661        warn_since: None,
16662        deny_since: None,
16663    },
16664    Lint {
16665        label: "variant_count",
16666        description: r##"# `variant_count`
16667
16668
16669
16670The tracking issue for this feature is: [#73662]
16671
16672[#73662]: https://github.com/rust-lang/rust/issues/73662
16673
16674------------------------
16675"##,
16676        default_severity: Severity::Allow,
16677        warn_since: None,
16678        deny_since: None,
16679    },
16680    Lint {
16681        label: "vec_deque_extract_if",
16682        description: r##"# `vec_deque_extract_if`
16683
16684
16685
16686The tracking issue for this feature is: [#147750]
16687
16688[#147750]: https://github.com/rust-lang/rust/issues/147750
16689
16690------------------------
16691"##,
16692        default_severity: Severity::Allow,
16693        warn_since: None,
16694        deny_since: None,
16695    },
16696    Lint {
16697        label: "vec_deque_iter_as_slices",
16698        description: r##"# `vec_deque_iter_as_slices`
16699
16700
16701
16702The tracking issue for this feature is: [#123947]
16703
16704[#123947]: https://github.com/rust-lang/rust/issues/123947
16705
16706------------------------
16707"##,
16708        default_severity: Severity::Allow,
16709        warn_since: None,
16710        deny_since: None,
16711    },
16712    Lint {
16713        label: "vec_deque_truncate_front",
16714        description: r##"# `vec_deque_truncate_front`
16715
16716
16717
16718The tracking issue for this feature is: [#140667]
16719
16720[#140667]: https://github.com/rust-lang/rust/issues/140667
16721
16722------------------------
16723"##,
16724        default_severity: Severity::Allow,
16725        warn_since: None,
16726        deny_since: None,
16727    },
16728    Lint {
16729        label: "vec_fallible_shrink",
16730        description: r##"# `vec_fallible_shrink`
16731
16732
16733
16734The tracking issue for this feature is: [#152350]
16735
16736[#152350]: https://github.com/rust-lang/rust/issues/152350
16737
16738------------------------
16739"##,
16740        default_severity: Severity::Allow,
16741        warn_since: None,
16742        deny_since: None,
16743    },
16744    Lint {
16745        label: "vec_from_fn",
16746        description: r##"# `vec_from_fn`
16747
16748
16749
16750The tracking issue for this feature is: [#149698]
16751
16752[#149698]: https://github.com/rust-lang/rust/issues/149698
16753
16754------------------------
16755"##,
16756        default_severity: Severity::Allow,
16757        warn_since: None,
16758        deny_since: None,
16759    },
16760    Lint {
16761        label: "vec_into_chunks",
16762        description: r##"# `vec_into_chunks`
16763
16764
16765
16766The tracking issue for this feature is: [#142137]
16767
16768[#142137]: https://github.com/rust-lang/rust/issues/142137
16769
16770------------------------
16771"##,
16772        default_severity: Severity::Allow,
16773        warn_since: None,
16774        deny_since: None,
16775    },
16776    Lint {
16777        label: "vec_peek_mut",
16778        description: r##"# `vec_peek_mut`
16779
16780
16781
16782The tracking issue for this feature is: [#122742]
16783
16784[#122742]: https://github.com/rust-lang/rust/issues/122742
16785
16786------------------------
16787"##,
16788        default_severity: Severity::Allow,
16789        warn_since: None,
16790        deny_since: None,
16791    },
16792    Lint {
16793        label: "vec_push_within_capacity",
16794        description: r##"# `vec_push_within_capacity`
16795
16796
16797
16798The tracking issue for this feature is: [#100486]
16799
16800[#100486]: https://github.com/rust-lang/rust/issues/100486
16801
16802------------------------
16803"##,
16804        default_severity: Severity::Allow,
16805        warn_since: None,
16806        deny_since: None,
16807    },
16808    Lint {
16809        label: "vec_recycle",
16810        description: r##"# `vec_recycle`
16811
16812
16813
16814The tracking issue for this feature is: [#148227]
16815
16816[#148227]: https://github.com/rust-lang/rust/issues/148227
16817
16818------------------------
16819"##,
16820        default_severity: Severity::Allow,
16821        warn_since: None,
16822        deny_since: None,
16823    },
16824    Lint {
16825        label: "vec_split_at_spare",
16826        description: r##"# `vec_split_at_spare`
16827
16828
16829
16830The tracking issue for this feature is: [#81944]
16831
16832[#81944]: https://github.com/rust-lang/rust/issues/81944
16833
16834------------------------
16835"##,
16836        default_severity: Severity::Allow,
16837        warn_since: None,
16838        deny_since: None,
16839    },
16840    Lint {
16841        label: "vec_try_remove",
16842        description: r##"# `vec_try_remove`
16843
16844
16845
16846The tracking issue for this feature is: [#146954]
16847
16848[#146954]: https://github.com/rust-lang/rust/issues/146954
16849
16850------------------------
16851"##,
16852        default_severity: Severity::Allow,
16853        warn_since: None,
16854        deny_since: None,
16855    },
16856    Lint {
16857        label: "view_types",
16858        description: r##"# `view_types`
16859
16860Allows view types.
16861
16862The tracking issue for this feature is: [#155938]
16863
16864[#155938]: https://github.com/rust-lang/rust/issues/155938
16865
16866------------------------
16867"##,
16868        default_severity: Severity::Allow,
16869        warn_since: None,
16870        deny_since: None,
16871    },
16872    Lint {
16873        label: "waker_fn",
16874        description: r##"# `waker_fn`
16875
16876
16877
16878The tracking issue for this feature is: [#149580]
16879
16880[#149580]: https://github.com/rust-lang/rust/issues/149580
16881
16882------------------------
16883"##,
16884        default_severity: Severity::Allow,
16885        warn_since: None,
16886        deny_since: None,
16887    },
16888    Lint {
16889        label: "waker_from_fn_ptr",
16890        description: r##"# `waker_from_fn_ptr`
16891
16892
16893
16894The tracking issue for this feature is: [#148457]
16895
16896[#148457]: https://github.com/rust-lang/rust/issues/148457
16897
16898------------------------
16899"##,
16900        default_severity: Severity::Allow,
16901        warn_since: None,
16902        deny_since: None,
16903    },
16904    Lint {
16905        label: "wasi_ext",
16906        description: r##"# `wasi_ext`
16907
16908
16909
16910The tracking issue for this feature is: [#71213]
16911
16912[#71213]: https://github.com/rust-lang/rust/issues/71213
16913
16914------------------------
16915"##,
16916        default_severity: Severity::Allow,
16917        warn_since: None,
16918        deny_since: None,
16919    },
16920    Lint {
16921        label: "wasm_target_feature",
16922        description: r##"# `wasm_target_feature`
16923
16924Target features on wasm.
16925
16926The tracking issue for this feature is: [#150260]
16927
16928[#150260]: https://github.com/rust-lang/rust/issues/150260
16929
16930------------------------
16931"##,
16932        default_severity: Severity::Allow,
16933        warn_since: None,
16934        deny_since: None,
16935    },
16936    Lint {
16937        label: "where_clause_attrs",
16938        description: r##"# `where_clause_attrs`
16939
16940Allows use of attributes in `where` clauses.
16941
16942The tracking issue for this feature is: [#115590]
16943
16944[#115590]: https://github.com/rust-lang/rust/issues/115590
16945
16946------------------------
16947"##,
16948        default_severity: Severity::Allow,
16949        warn_since: None,
16950        deny_since: None,
16951    },
16952    Lint {
16953        label: "widening_mul",
16954        description: r##"# `widening_mul`
16955
16956
16957
16958The tracking issue for this feature is: [#152016]
16959
16960[#152016]: https://github.com/rust-lang/rust/issues/152016
16961
16962------------------------
16963"##,
16964        default_severity: Severity::Allow,
16965        warn_since: None,
16966        deny_since: None,
16967    },
16968    Lint {
16969        label: "windows_by_handle",
16970        description: r##"# `windows_by_handle`
16971
16972
16973
16974The tracking issue for this feature is: [#63010]
16975
16976[#63010]: https://github.com/rust-lang/rust/issues/63010
16977
16978------------------------
16979"##,
16980        default_severity: Severity::Allow,
16981        warn_since: None,
16982        deny_since: None,
16983    },
16984    Lint {
16985        label: "windows_c",
16986        description: r##"# `windows_c`
16987
16988This feature is internal to the Rust compiler and is not intended for general use.
16989
16990------------------------
16991"##,
16992        default_severity: Severity::Allow,
16993        warn_since: None,
16994        deny_since: None,
16995    },
16996    Lint {
16997        label: "windows_change_time",
16998        description: r##"# `windows_change_time`
16999
17000
17001
17002The tracking issue for this feature is: [#121478]
17003
17004[#121478]: https://github.com/rust-lang/rust/issues/121478
17005
17006------------------------
17007"##,
17008        default_severity: Severity::Allow,
17009        warn_since: None,
17010        deny_since: None,
17011    },
17012    Lint {
17013        label: "windows_freeze_file_times",
17014        description: r##"# `windows_freeze_file_times`
17015
17016
17017
17018The tracking issue for this feature is: [#149715]
17019
17020[#149715]: https://github.com/rust-lang/rust/issues/149715
17021
17022------------------------
17023"##,
17024        default_severity: Severity::Allow,
17025        warn_since: None,
17026        deny_since: None,
17027    },
17028    Lint {
17029        label: "windows_handle",
17030        description: r##"# `windows_handle`
17031
17032This feature is internal to the Rust compiler and is not intended for general use.
17033
17034------------------------
17035"##,
17036        default_severity: Severity::Allow,
17037        warn_since: None,
17038        deny_since: None,
17039    },
17040    Lint {
17041        label: "windows_net",
17042        description: r##"# `windows_net`
17043
17044This feature is internal to the Rust compiler and is not intended for general use.
17045
17046------------------------
17047"##,
17048        default_severity: Severity::Allow,
17049        warn_since: None,
17050        deny_since: None,
17051    },
17052    Lint {
17053        label: "windows_permissions_ext",
17054        description: r##"# `windows_permissions_ext`
17055
17056
17057
17058The tracking issue for this feature is: [#152956]
17059
17060[#152956]: https://github.com/rust-lang/rust/issues/152956
17061
17062------------------------
17063"##,
17064        default_severity: Severity::Allow,
17065        warn_since: None,
17066        deny_since: None,
17067    },
17068    Lint {
17069        label: "windows_process_exit_code_from",
17070        description: r##"# `windows_process_exit_code_from`
17071
17072
17073
17074The tracking issue for this feature is: [#111688]
17075
17076[#111688]: https://github.com/rust-lang/rust/issues/111688
17077
17078------------------------
17079"##,
17080        default_severity: Severity::Allow,
17081        warn_since: None,
17082        deny_since: None,
17083    },
17084    Lint {
17085        label: "windows_process_extensions_async_pipes",
17086        description: r##"# `windows_process_extensions_async_pipes`
17087
17088
17089
17090The tracking issue for this feature is: [#98289]
17091
17092[#98289]: https://github.com/rust-lang/rust/issues/98289
17093
17094------------------------
17095"##,
17096        default_severity: Severity::Allow,
17097        warn_since: None,
17098        deny_since: None,
17099    },
17100    Lint {
17101        label: "windows_process_extensions_force_quotes",
17102        description: r##"# `windows_process_extensions_force_quotes`
17103
17104
17105
17106The tracking issue for this feature is: [#82227]
17107
17108[#82227]: https://github.com/rust-lang/rust/issues/82227
17109
17110------------------------
17111"##,
17112        default_severity: Severity::Allow,
17113        warn_since: None,
17114        deny_since: None,
17115    },
17116    Lint {
17117        label: "windows_process_extensions_inherit_handles",
17118        description: r##"# `windows_process_extensions_inherit_handles`
17119
17120
17121
17122The tracking issue for this feature is: [#146407]
17123
17124[#146407]: https://github.com/rust-lang/rust/issues/146407
17125
17126------------------------
17127"##,
17128        default_severity: Severity::Allow,
17129        warn_since: None,
17130        deny_since: None,
17131    },
17132    Lint {
17133        label: "windows_process_extensions_main_thread_handle",
17134        description: r##"# `windows_process_extensions_main_thread_handle`
17135
17136
17137
17138The tracking issue for this feature is: [#96723]
17139
17140[#96723]: https://github.com/rust-lang/rust/issues/96723
17141
17142------------------------
17143"##,
17144        default_severity: Severity::Allow,
17145        warn_since: None,
17146        deny_since: None,
17147    },
17148    Lint {
17149        label: "windows_process_extensions_raw_attribute",
17150        description: r##"# `windows_process_extensions_raw_attribute`
17151
17152
17153
17154The tracking issue for this feature is: [#114854]
17155
17156[#114854]: https://github.com/rust-lang/rust/issues/114854
17157
17158------------------------
17159"##,
17160        default_severity: Severity::Allow,
17161        warn_since: None,
17162        deny_since: None,
17163    },
17164    Lint {
17165        label: "windows_process_extensions_show_window",
17166        description: r##"# `windows_process_extensions_show_window`
17167
17168
17169
17170The tracking issue for this feature is: [#127544]
17171
17172[#127544]: https://github.com/rust-lang/rust/issues/127544
17173
17174------------------------
17175"##,
17176        default_severity: Severity::Allow,
17177        warn_since: None,
17178        deny_since: None,
17179    },
17180    Lint {
17181        label: "windows_process_extensions_startupinfo",
17182        description: r##"# `windows_process_extensions_startupinfo`
17183
17184
17185
17186The tracking issue for this feature is: [#141010]
17187
17188[#141010]: https://github.com/rust-lang/rust/issues/141010
17189
17190------------------------
17191"##,
17192        default_severity: Severity::Allow,
17193        warn_since: None,
17194        deny_since: None,
17195    },
17196    Lint {
17197        label: "windows_stdio",
17198        description: r##"# `windows_stdio`
17199
17200This feature is internal to the Rust compiler and is not intended for general use.
17201
17202------------------------
17203"##,
17204        default_severity: Severity::Allow,
17205        warn_since: None,
17206        deny_since: None,
17207    },
17208    Lint {
17209        label: "windows_unix_domain_sockets",
17210        description: r##"# `windows_unix_domain_sockets`
17211
17212
17213
17214The tracking issue for this feature is: [#150487]
17215
17216[#150487]: https://github.com/rust-lang/rust/issues/150487
17217
17218------------------------
17219"##,
17220        default_severity: Severity::Allow,
17221        warn_since: None,
17222        deny_since: None,
17223    },
17224    Lint {
17225        label: "with_negative_coherence",
17226        description: r##"# `with_negative_coherence`
17227
17228Use for stable + negative coherence and strict coherence depending on trait's rustc_strict_coherence value.
17229
17230This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
17231
17232------------------------
17233"##,
17234        default_severity: Severity::Allow,
17235        warn_since: None,
17236        deny_since: None,
17237    },
17238    Lint {
17239        label: "wrapping_int_impl",
17240        description: r##"# `wrapping_int_impl`
17241
17242
17243
17244The tracking issue for this feature is: [#32463]
17245
17246[#32463]: https://github.com/rust-lang/rust/issues/32463
17247
17248------------------------
17249"##,
17250        default_severity: Severity::Allow,
17251        warn_since: None,
17252        deny_since: None,
17253    },
17254    Lint {
17255        label: "wrapping_next_power_of_two",
17256        description: r##"# `wrapping_next_power_of_two`
17257
17258
17259
17260The tracking issue for this feature is: [#32463]
17261
17262[#32463]: https://github.com/rust-lang/rust/issues/32463
17263
17264------------------------
17265"##,
17266        default_severity: Severity::Allow,
17267        warn_since: None,
17268        deny_since: None,
17269    },
17270    Lint {
17271        label: "write_all_vectored",
17272        description: r##"# `write_all_vectored`
17273
17274
17275
17276The tracking issue for this feature is: [#70436]
17277
17278[#70436]: https://github.com/rust-lang/rust/issues/70436
17279
17280------------------------
17281"##,
17282        default_severity: Severity::Allow,
17283        warn_since: None,
17284        deny_since: None,
17285    },
17286    Lint {
17287        label: "wtf8_internals",
17288        description: r##"# `wtf8_internals`
17289
17290
17291
17292This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
17293
17294------------------------
17295"##,
17296        default_severity: Severity::Allow,
17297        warn_since: None,
17298        deny_since: None,
17299    },
17300    Lint {
17301        label: "x86_amx_intrinsics",
17302        description: r##"# `x86_amx_intrinsics`
17303
17304Allows use of x86 `AMX` target-feature attributes and intrinsics
17305
17306The tracking issue for this feature is: [#126622]
17307
17308[#126622]: https://github.com/rust-lang/rust/issues/126622
17309
17310------------------------
17311"##,
17312        default_severity: Severity::Allow,
17313        warn_since: None,
17314        deny_since: None,
17315    },
17316    Lint {
17317        label: "x87_target_feature",
17318        description: r##"# `x87_target_feature`
17319
17320The x87 target feature on x86.
17321
17322The tracking issue for this feature is: [#150261]
17323
17324[#150261]: https://github.com/rust-lang/rust/issues/150261
17325
17326------------------------
17327"##,
17328        default_severity: Severity::Allow,
17329        warn_since: None,
17330        deny_since: None,
17331    },
17332    Lint {
17333        label: "xop_target_feature",
17334        description: r##"# `xop_target_feature`
17335
17336Allows use of the `xop` target-feature
17337
17338The tracking issue for this feature is: [#127208]
17339
17340[#127208]: https://github.com/rust-lang/rust/issues/127208
17341
17342------------------------
17343"##,
17344        default_severity: Severity::Allow,
17345        warn_since: None,
17346        deny_since: None,
17347    },
17348    Lint {
17349        label: "yeet_desugar_details",
17350        description: r##"# `yeet_desugar_details`
17351
17352
17353
17354This feature has no tracking issue, and is therefore likely internal to the compiler, not being intended for general use.
17355
17356------------------------
17357"##,
17358        default_severity: Severity::Allow,
17359        warn_since: None,
17360        deny_since: None,
17361    },
17362    Lint {
17363        label: "yeet_expr",
17364        description: r##"# `yeet_expr`
17365
17366The tracking issue for this feature is: [#96373]
17367
17368[#96373]: https://github.com/rust-lang/rust/issues/96373
17369
17370------------------------
17371
17372The `yeet_expr` feature adds support for `do yeet` expressions,
17373which can be used to early-exit from a function or `try` block.
17374
17375These are highly experimental, thus the placeholder syntax.
17376
17377```rust,edition2021
17378#![feature(yeet_expr)]
17379
17380fn foo() -> Result<String, i32> {
17381    do yeet 4;
17382}
17383assert_eq!(foo(), Err(4));
17384
17385fn bar() -> Option<String> {
17386    do yeet;
17387}
17388assert_eq!(bar(), None);
17389```
17390"##,
17391        default_severity: Severity::Allow,
17392        warn_since: None,
17393        deny_since: None,
17394    },
17395    Lint {
17396        label: "yield_expr",
17397        description: r##"# `yield_expr`
17398
17399
17400
17401The tracking issue for this feature is: [#43122]
17402
17403[#43122]: https://github.com/rust-lang/rust/issues/43122
17404
17405------------------------
17406"##,
17407        default_severity: Severity::Allow,
17408        warn_since: None,
17409        deny_since: None,
17410    },
17411];
17412
17413pub const CLIPPY_LINTS: &[Lint] = &[
17414    Lint {
17415        label: "clippy::absolute_paths",
17416        description: r##"Checks for usage of items through absolute paths, like `std::env::current_dir`."##,
17417        default_severity: Severity::Allow,
17418        warn_since: None,
17419        deny_since: None,
17420    },
17421    Lint {
17422        label: "clippy::absurd_extreme_comparisons",
17423        description: r##"Checks for comparisons where one side of the relation is
17424either the minimum or maximum value for its type and warns if it involves a
17425case that is always true or always false. Only integer and boolean types are
17426checked."##,
17427        default_severity: Severity::Allow,
17428        warn_since: None,
17429        deny_since: None,
17430    },
17431    Lint {
17432        label: "clippy::alloc_instead_of_core",
17433        description: r##"Finds items imported through `alloc` when available through `core`."##,
17434        default_severity: Severity::Allow,
17435        warn_since: None,
17436        deny_since: None,
17437    },
17438    Lint {
17439        label: "clippy::allow_attributes",
17440        description: r##"Checks for usage of the `#[allow]` attribute and suggests replacing it with
17441the `#[expect]` (See [RFC 2383](https://rust-lang.github.io/rfcs/2383-lint-reasons.html))
17442
17443This lint only warns outer attributes (`#[allow]`), as inner attributes
17444(`#![allow]`) are usually used to enable or disable lints on a global scale."##,
17445        default_severity: Severity::Allow,
17446        warn_since: None,
17447        deny_since: None,
17448    },
17449    Lint {
17450        label: "clippy::allow_attributes_without_reason",
17451        description: r##"Checks for attributes that allow lints without a reason."##,
17452        default_severity: Severity::Allow,
17453        warn_since: None,
17454        deny_since: None,
17455    },
17456    Lint {
17457        label: "clippy::almost_complete_range",
17458        description: r##"Checks for ranges which almost include the entire range of letters from 'a' to 'z'
17459or digits from '0' to '9', but don't because they're a half open range."##,
17460        default_severity: Severity::Allow,
17461        warn_since: None,
17462        deny_since: None,
17463    },
17464    Lint {
17465        label: "clippy::almost_swapped",
17466        description: r##"Checks for `foo = bar; bar = foo` sequences."##,
17467        default_severity: Severity::Allow,
17468        warn_since: None,
17469        deny_since: None,
17470    },
17471    Lint {
17472        label: "clippy::approx_constant",
17473        description: r##"Checks for floating point literals that approximate
17474constants which are defined in
17475[`std::f32::consts`](https://doc.rust-lang.org/stable/std/f32/consts/#constants)
17476or
17477[`std::f64::consts`](https://doc.rust-lang.org/stable/std/f64/consts/#constants),
17478respectively, suggesting to use the predefined constant."##,
17479        default_severity: Severity::Allow,
17480        warn_since: None,
17481        deny_since: None,
17482    },
17483    Lint {
17484        label: "clippy::arc_with_non_send_sync",
17485        description: r##".
17486This lint warns when you use `Arc` with a type that does not implement `Send` or `Sync`."##,
17487        default_severity: Severity::Allow,
17488        warn_since: None,
17489        deny_since: None,
17490    },
17491    Lint {
17492        label: "clippy::arithmetic_side_effects",
17493        description: r##"Checks any kind of arithmetic operation of any type.
17494
17495Operators like `+`, `-`, `*` or `<<` are usually capable of overflowing according to the [Rust
17496Reference](https://doc.rust-lang.org/reference/expressions/operator-expr.html#overflow),
17497or can panic (`/`, `%`).
17498
17499Known safe built-in types like `Wrapping` or `Saturating`, floats, operations in constant
17500environments, allowed types and non-constant operations that won't overflow are ignored."##,
17501        default_severity: Severity::Allow,
17502        warn_since: None,
17503        deny_since: None,
17504    },
17505    Lint {
17506        label: "clippy::as_conversions",
17507        description: r##"Checks for usage of `as` conversions.
17508
17509Note that this lint is specialized in linting *every single* use of `as`
17510regardless of whether good alternatives exist or not.
17511If you want more precise lints for `as`, please consider using these separate lints:
17512`unnecessary_cast`, `cast_lossless/cast_possible_truncation/cast_possible_wrap/cast_precision_loss/cast_sign_loss`,
17513`fn_to_numeric_cast(_with_truncation)`, `char_lit_as_u8`, `ref_to_mut` and `ptr_as_ptr`.
17514There is a good explanation the reason why this lint should work in this way and how it is useful
17515[in this issue](https://github.com/rust-lang/rust-clippy/issues/5122)."##,
17516        default_severity: Severity::Allow,
17517        warn_since: None,
17518        deny_since: None,
17519    },
17520    Lint {
17521        label: "clippy::as_ptr_cast_mut",
17522        description: r##"Checks for the result of a `&self`-taking `as_ptr` being cast to a mutable pointer."##,
17523        default_severity: Severity::Allow,
17524        warn_since: None,
17525        deny_since: None,
17526    },
17527    Lint {
17528        label: "clippy::as_underscore",
17529        description: r##"Checks for the usage of `as _` conversion using inferred type."##,
17530        default_severity: Severity::Allow,
17531        warn_since: None,
17532        deny_since: None,
17533    },
17534    Lint {
17535        label: "clippy::assertions_on_constants",
17536        description: r##"Checks for `assert!(true)` and `assert!(false)` calls."##,
17537        default_severity: Severity::Allow,
17538        warn_since: None,
17539        deny_since: None,
17540    },
17541    Lint {
17542        label: "clippy::assertions_on_result_states",
17543        description: r##"Checks for `assert!(r.is_ok())` or `assert!(r.is_err())` calls."##,
17544        default_severity: Severity::Allow,
17545        warn_since: None,
17546        deny_since: None,
17547    },
17548    Lint {
17549        label: "clippy::assign_op_pattern",
17550        description: r##"Checks for `a = a op b` or `a = b commutative_op a`
17551patterns."##,
17552        default_severity: Severity::Allow,
17553        warn_since: None,
17554        deny_since: None,
17555    },
17556    Lint {
17557        label: "clippy::assign_ops",
17558        description: r##"Nothing. This lint has been deprecated"##,
17559        default_severity: Severity::Allow,
17560        warn_since: None,
17561        deny_since: None,
17562    },
17563    Lint {
17564        label: "clippy::assigning_clones",
17565        description: r##"Checks for code like `foo = bar.clone();`"##,
17566        default_severity: Severity::Allow,
17567        warn_since: None,
17568        deny_since: None,
17569    },
17570    Lint {
17571        label: "clippy::async_yields_async",
17572        description: r##"Checks for async blocks that yield values of types
17573that can themselves be awaited."##,
17574        default_severity: Severity::Allow,
17575        warn_since: None,
17576        deny_since: None,
17577    },
17578    Lint {
17579        label: "clippy::await_holding_invalid_type",
17580        description: r##"Allows users to configure types which should not be held across await
17581suspension points."##,
17582        default_severity: Severity::Allow,
17583        warn_since: None,
17584        deny_since: None,
17585    },
17586    Lint {
17587        label: "clippy::await_holding_lock",
17588        description: r##"Checks for calls to `await` while holding a non-async-aware
17589`MutexGuard`."##,
17590        default_severity: Severity::Allow,
17591        warn_since: None,
17592        deny_since: None,
17593    },
17594    Lint {
17595        label: "clippy::await_holding_refcell_ref",
17596        description: r##"Checks for calls to `await` while holding a `RefCell`, `Ref`, or `RefMut`."##,
17597        default_severity: Severity::Allow,
17598        warn_since: None,
17599        deny_since: None,
17600    },
17601    Lint {
17602        label: "clippy::bad_bit_mask",
17603        description: r##"Checks for incompatible bit masks in comparisons.
17604
17605The formula for detecting if an expression of the type `_ <bit_op> m
17606<cmp_op> c` (where `<bit_op>` is one of {`&`, `|`} and `<cmp_op>` is one of
17607{`!=`, `>=`, `>`, `!=`, `>=`, `>`}) can be determined from the following
17608table:
17609
17610|Comparison  |Bit Op|Example      |is always|Formula               |
17611|------------|------|-------------|---------|----------------------|
17612|`==` or `!=`| `&`  |`x & 2 == 3` |`false`  |`c & m != c`          |
17613|`<`  or `>=`| `&`  |`x & 2 < 3`  |`true`   |`m < c`               |
17614|`>`  or `<=`| `&`  |`x & 1 > 1`  |`false`  |`m <= c`              |
17615|`==` or `!=`| `\\|` |`x \\| 1 == 0`|`false`  |`c \\| m != c`         |
17616|`<`  or `>=`| `\\|` |`x \\| 1 < 1` |`false`  |`m >= c`              |
17617|`<=` or `>` | `\\|` |`x \\| 1 > 0` |`true`   |`m > c`               |"##,
17618        default_severity: Severity::Allow,
17619        warn_since: None,
17620        deny_since: None,
17621    },
17622    Lint {
17623        label: "clippy::big_endian_bytes",
17624        description: r##"Checks for the usage of the `to_be_bytes` method and/or the function `from_be_bytes`."##,
17625        default_severity: Severity::Allow,
17626        warn_since: None,
17627        deny_since: None,
17628    },
17629    Lint {
17630        label: "clippy::bind_instead_of_map",
17631        description: r##"Checks for usage of `_.and_then(|x| Some(y))`, `_.and_then(|x| Ok(y))`
17632or `_.or_else(|x| Err(y))`."##,
17633        default_severity: Severity::Allow,
17634        warn_since: None,
17635        deny_since: None,
17636    },
17637    Lint {
17638        label: "clippy::blanket_clippy_restriction_lints",
17639        description: r##"Checks for `warn`/`deny`/`forbid` attributes targeting the whole clippy::restriction category."##,
17640        default_severity: Severity::Allow,
17641        warn_since: None,
17642        deny_since: None,
17643    },
17644    Lint {
17645        label: "clippy::blocks_in_conditions",
17646        description: r##"Checks for `if` and `match` conditions that use blocks containing an
17647expression, statements or conditions that use closures with blocks."##,
17648        default_severity: Severity::Allow,
17649        warn_since: None,
17650        deny_since: None,
17651    },
17652    Lint {
17653        label: "clippy::bool_assert_comparison",
17654        description: r##"This lint warns about boolean comparisons in assert-like macros."##,
17655        default_severity: Severity::Allow,
17656        warn_since: None,
17657        deny_since: None,
17658    },
17659    Lint {
17660        label: "clippy::bool_comparison",
17661        description: r##"Checks for expressions of the form `x == true`,
17662`x != true` and order comparisons such as `x < true` (or vice versa) and
17663suggest using the variable directly."##,
17664        default_severity: Severity::Allow,
17665        warn_since: None,
17666        deny_since: None,
17667    },
17668    Lint {
17669        label: "clippy::bool_to_int_with_if",
17670        description: r##"Instead of using an if statement to convert a bool to an int,
17671this lint suggests using a `from()` function or an `as` coercion."##,
17672        default_severity: Severity::Allow,
17673        warn_since: None,
17674        deny_since: None,
17675    },
17676    Lint {
17677        label: "clippy::borrow_as_ptr",
17678        description: r##"Checks for the usage of `&expr as *const T` or
17679`&mut expr as *mut T`, and suggest using `ptr::addr_of` or
17680`ptr::addr_of_mut` instead."##,
17681        default_severity: Severity::Allow,
17682        warn_since: None,
17683        deny_since: None,
17684    },
17685    Lint {
17686        label: "clippy::borrow_deref_ref",
17687        description: r##"Checks for `&*(&T)`."##,
17688        default_severity: Severity::Allow,
17689        warn_since: None,
17690        deny_since: None,
17691    },
17692    Lint {
17693        label: "clippy::borrow_interior_mutable_const",
17694        description: r##"Checks if `const` items which is interior mutable (e.g.,
17695contains a `Cell`, `Mutex`, `AtomicXxxx`, etc.) has been borrowed directly."##,
17696        default_severity: Severity::Allow,
17697        warn_since: None,
17698        deny_since: None,
17699    },
17700    Lint {
17701        label: "clippy::borrowed_box",
17702        description: r##"Checks for usage of `&Box<T>` anywhere in the code.
17703Check the [Box documentation](https://doc.rust-lang.org/std/boxed/index.html) for more information."##,
17704        default_severity: Severity::Allow,
17705        warn_since: None,
17706        deny_since: None,
17707    },
17708    Lint {
17709        label: "clippy::box_collection",
17710        description: r##"Checks for usage of `Box<T>` where T is a collection such as Vec 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_default",
17718        description: r##"checks for `Box::new(Default::default())`, which can be written as
17719`Box::default()`."##,
17720        default_severity: Severity::Allow,
17721        warn_since: None,
17722        deny_since: None,
17723    },
17724    Lint {
17725        label: "clippy::boxed_local",
17726        description: r##"Checks for usage of `Box<T>` where an unboxed `T` would
17727work fine."##,
17728        default_severity: Severity::Allow,
17729        warn_since: None,
17730        deny_since: None,
17731    },
17732    Lint {
17733        label: "clippy::branches_sharing_code",
17734        description: r##"Checks if the `if` and `else` block contain shared code that can be
17735moved out of the blocks."##,
17736        default_severity: Severity::Allow,
17737        warn_since: None,
17738        deny_since: None,
17739    },
17740    Lint {
17741        label: "clippy::builtin_type_shadow",
17742        description: r##"Warns if a generic shadows a built-in type."##,
17743        default_severity: Severity::Allow,
17744        warn_since: None,
17745        deny_since: None,
17746    },
17747    Lint {
17748        label: "clippy::byte_char_slices",
17749        description: r##"Checks for hard to read slices of byte characters, that could be more easily expressed as a
17750byte string."##,
17751        default_severity: Severity::Allow,
17752        warn_since: None,
17753        deny_since: None,
17754    },
17755    Lint {
17756        label: "clippy::bytes_count_to_len",
17757        description: r##"It checks for `str::bytes().count()` and suggests replacing it with
17758`str::len()`."##,
17759        default_severity: Severity::Allow,
17760        warn_since: None,
17761        deny_since: None,
17762    },
17763    Lint {
17764        label: "clippy::bytes_nth",
17765        description: r##"Checks for the use of `.bytes().nth()`."##,
17766        default_severity: Severity::Allow,
17767        warn_since: None,
17768        deny_since: None,
17769    },
17770    Lint {
17771        label: "clippy::cargo_common_metadata",
17772        description: r##"Checks to see if all common metadata is defined in
17773`Cargo.toml`. See: https://rust-lang-nursery.github.io/api-guidelines/documentation.html#cargotoml-includes-all-common-metadata-c-metadata"##,
17774        default_severity: Severity::Allow,
17775        warn_since: None,
17776        deny_since: None,
17777    },
17778    Lint {
17779        label: "clippy::case_sensitive_file_extension_comparisons",
17780        description: r##"Checks for calls to `ends_with` with possible file extensions
17781and suggests to use a case-insensitive approach instead."##,
17782        default_severity: Severity::Allow,
17783        warn_since: None,
17784        deny_since: None,
17785    },
17786    Lint {
17787        label: "clippy::cast_abs_to_unsigned",
17788        description: r##"Checks for usage of the `abs()` method that cast the result to unsigned."##,
17789        default_severity: Severity::Allow,
17790        warn_since: None,
17791        deny_since: None,
17792    },
17793    Lint {
17794        label: "clippy::cast_enum_constructor",
17795        description: r##"Checks for casts from an enum tuple constructor to an integer."##,
17796        default_severity: Severity::Allow,
17797        warn_since: None,
17798        deny_since: None,
17799    },
17800    Lint {
17801        label: "clippy::cast_enum_truncation",
17802        description: r##"Checks for casts from an enum type to an integral type that will definitely truncate the
17803value."##,
17804        default_severity: Severity::Allow,
17805        warn_since: None,
17806        deny_since: None,
17807    },
17808    Lint {
17809        label: "clippy::cast_lossless",
17810        description: r##"Checks for casts between numeric types that can be replaced by safe
17811conversion functions."##,
17812        default_severity: Severity::Allow,
17813        warn_since: None,
17814        deny_since: None,
17815    },
17816    Lint {
17817        label: "clippy::cast_nan_to_int",
17818        description: r##"Checks for a known NaN float being cast to an integer"##,
17819        default_severity: Severity::Allow,
17820        warn_since: None,
17821        deny_since: None,
17822    },
17823    Lint {
17824        label: "clippy::cast_possible_truncation",
17825        description: r##"Checks for casts between numeric types that may
17826truncate large values. This is expected behavior, so the cast is `Allow` by
17827default. It suggests user either explicitly ignore the lint,
17828or use `try_from()` and handle the truncation, default, or panic explicitly."##,
17829        default_severity: Severity::Allow,
17830        warn_since: None,
17831        deny_since: None,
17832    },
17833    Lint {
17834        label: "clippy::cast_possible_wrap",
17835        description: r##"Checks for casts from an unsigned type to a signed type of
17836the same size, or possibly smaller due to target-dependent integers.
17837Performing such a cast is a no-op for the compiler (that is, nothing is
17838changed at the bit level), and the binary representation of the value is
17839reinterpreted. This can cause wrapping if the value is too big
17840for the target signed type. However, the cast works as defined, so this lint
17841is `Allow` by default."##,
17842        default_severity: Severity::Allow,
17843        warn_since: None,
17844        deny_since: None,
17845    },
17846    Lint {
17847        label: "clippy::cast_precision_loss",
17848        description: r##"Checks for casts from any numeric type to a float type where
17849the receiving type cannot store all values from the original type without
17850rounding errors. This possible rounding is to be expected, so this lint is
17851`Allow` by default.
17852
17853Basically, this warns on casting any integer with 32 or more bits to `f32`
17854or any 64-bit integer to `f64`."##,
17855        default_severity: Severity::Allow,
17856        warn_since: None,
17857        deny_since: None,
17858    },
17859    Lint {
17860        label: "clippy::cast_ptr_alignment",
17861        description: r##"Checks for casts, using `as` or `pointer::cast`, from a
17862less strictly aligned pointer to a more strictly aligned pointer."##,
17863        default_severity: Severity::Allow,
17864        warn_since: None,
17865        deny_since: None,
17866    },
17867    Lint {
17868        label: "clippy::cast_sign_loss",
17869        description: r##"Checks for casts from a signed to an unsigned numeric
17870type. In this case, negative values wrap around to large positive values,
17871which can be quite surprising in practice. However, since the cast works as
17872defined, this lint is `Allow` by default."##,
17873        default_severity: Severity::Allow,
17874        warn_since: None,
17875        deny_since: None,
17876    },
17877    Lint {
17878        label: "clippy::cast_slice_different_sizes",
17879        description: r##"Checks for `as` casts between raw pointers to slices with differently sized elements."##,
17880        default_severity: Severity::Allow,
17881        warn_since: None,
17882        deny_since: None,
17883    },
17884    Lint {
17885        label: "clippy::cast_slice_from_raw_parts",
17886        description: r##"Checks for a raw slice being cast to a slice pointer"##,
17887        default_severity: Severity::Allow,
17888        warn_since: None,
17889        deny_since: None,
17890    },
17891    Lint {
17892        label: "clippy::cfg_not_test",
17893        description: r##"Checks for usage of `cfg` that excludes code from `test` builds. (i.e., `#[cfg(not(test))]`)"##,
17894        default_severity: Severity::Allow,
17895        warn_since: None,
17896        deny_since: None,
17897    },
17898    Lint {
17899        label: "clippy::char_lit_as_u8",
17900        description: r##"Checks for expressions where a character literal is cast
17901to `u8` and suggests using a byte literal instead."##,
17902        default_severity: Severity::Allow,
17903        warn_since: None,
17904        deny_since: None,
17905    },
17906    Lint {
17907        label: "clippy::chars_last_cmp",
17908        description: r##"Checks for usage of `_.chars().last()` or
17909`_.chars().next_back()` on a `str` to check if it ends with a given char."##,
17910        default_severity: Severity::Allow,
17911        warn_since: None,
17912        deny_since: None,
17913    },
17914    Lint {
17915        label: "clippy::chars_next_cmp",
17916        description: r##"Checks for usage of `.chars().next()` on a `str` to check
17917if it starts with a given char."##,
17918        default_severity: Severity::Allow,
17919        warn_since: None,
17920        deny_since: None,
17921    },
17922    Lint {
17923        label: "clippy::checked_conversions",
17924        description: r##"Checks for explicit bounds checking when casting."##,
17925        default_severity: Severity::Allow,
17926        warn_since: None,
17927        deny_since: None,
17928    },
17929    Lint {
17930        label: "clippy::clear_with_drain",
17931        description: r##"Checks for usage of `.drain(..)` for the sole purpose of clearing a container."##,
17932        default_severity: Severity::Allow,
17933        warn_since: None,
17934        deny_since: None,
17935    },
17936    Lint {
17937        label: "clippy::clone_on_copy",
17938        description: r##"Checks for usage of `.clone()` on a `Copy` type."##,
17939        default_severity: Severity::Allow,
17940        warn_since: None,
17941        deny_since: None,
17942    },
17943    Lint {
17944        label: "clippy::clone_on_ref_ptr",
17945        description: r##"Checks for usage of `.clone()` on a ref-counted pointer,
17946(`Rc`, `Arc`, `rc::Weak`, or `sync::Weak`), and suggests calling Clone via unified
17947function syntax instead (e.g., `Rc::clone(foo)`)."##,
17948        default_severity: Severity::Allow,
17949        warn_since: None,
17950        deny_since: None,
17951    },
17952    Lint {
17953        label: "clippy::cloned_instead_of_copied",
17954        description: r##"Checks for usage of `cloned()` on an `Iterator` or `Option` where
17955`copied()` could be used instead."##,
17956        default_severity: Severity::Allow,
17957        warn_since: None,
17958        deny_since: None,
17959    },
17960    Lint {
17961        label: "clippy::cmp_null",
17962        description: r##"This lint checks for equality comparisons with `ptr::null`"##,
17963        default_severity: Severity::Allow,
17964        warn_since: None,
17965        deny_since: None,
17966    },
17967    Lint {
17968        label: "clippy::cmp_owned",
17969        description: r##"Checks for conversions to owned values just for the sake
17970of a comparison."##,
17971        default_severity: Severity::Allow,
17972        warn_since: None,
17973        deny_since: None,
17974    },
17975    Lint {
17976        label: "clippy::cognitive_complexity",
17977        description: r##"Checks for methods with high cognitive complexity."##,
17978        default_severity: Severity::Allow,
17979        warn_since: None,
17980        deny_since: None,
17981    },
17982    Lint {
17983        label: "clippy::collapsible_else_if",
17984        description: r##"Checks for collapsible `else { if ... }` expressions
17985that can be collapsed to `else if ...`."##,
17986        default_severity: Severity::Allow,
17987        warn_since: None,
17988        deny_since: None,
17989    },
17990    Lint {
17991        label: "clippy::collapsible_if",
17992        description: r##"Checks for nested `if` statements which can be collapsed
17993by `&&`-combining their conditions."##,
17994        default_severity: Severity::Allow,
17995        warn_since: None,
17996        deny_since: None,
17997    },
17998    Lint {
17999        label: "clippy::collapsible_match",
18000        description: r##"Finds nested `match` or `if let` expressions where the patterns may be collapsed together
18001without adding any branches.
18002
18003Note that this lint is not intended to find _all_ cases where nested match patterns can be merged, but only
18004cases where merging would most likely make the code more readable."##,
18005        default_severity: Severity::Allow,
18006        warn_since: None,
18007        deny_since: None,
18008    },
18009    Lint {
18010        label: "clippy::collapsible_str_replace",
18011        description: r##"Checks for consecutive calls to `str::replace` (2 or more)
18012that can be collapsed into a single call."##,
18013        default_severity: Severity::Allow,
18014        warn_since: None,
18015        deny_since: None,
18016    },
18017    Lint {
18018        label: "clippy::collection_is_never_read",
18019        description: r##"Checks for collections that are never queried."##,
18020        default_severity: Severity::Allow,
18021        warn_since: None,
18022        deny_since: None,
18023    },
18024    Lint {
18025        label: "clippy::comparison_chain",
18026        description: r##"Checks comparison chains written with `if` that can be
18027rewritten with `match` and `cmp`."##,
18028        default_severity: Severity::Allow,
18029        warn_since: None,
18030        deny_since: None,
18031    },
18032    Lint {
18033        label: "clippy::comparison_to_empty",
18034        description: r##"Checks for comparing to an empty slice such as `` or `[]`,
18035and suggests using `.is_empty()` where applicable."##,
18036        default_severity: Severity::Allow,
18037        warn_since: None,
18038        deny_since: None,
18039    },
18040    Lint {
18041        label: "clippy::const_is_empty",
18042        description: r##"It identifies calls to `.is_empty()` on constant values."##,
18043        default_severity: Severity::Allow,
18044        warn_since: None,
18045        deny_since: None,
18046    },
18047    Lint {
18048        label: "clippy::copy_iterator",
18049        description: r##"Checks for types that implement `Copy` as well as
18050`Iterator`."##,
18051        default_severity: Severity::Allow,
18052        warn_since: None,
18053        deny_since: None,
18054    },
18055    Lint {
18056        label: "clippy::crate_in_macro_def",
18057        description: r##"Checks for usage of `crate` as opposed to `$crate` in a macro definition."##,
18058        default_severity: Severity::Allow,
18059        warn_since: None,
18060        deny_since: None,
18061    },
18062    Lint {
18063        label: "clippy::create_dir",
18064        description: r##"Checks usage of `std::fs::create_dir` and suggest using `std::fs::create_dir_all` instead."##,
18065        default_severity: Severity::Allow,
18066        warn_since: None,
18067        deny_since: None,
18068    },
18069    Lint {
18070        label: "clippy::crosspointer_transmute",
18071        description: r##"Checks for transmutes between a type `T` and `*T`."##,
18072        default_severity: Severity::Allow,
18073        warn_since: None,
18074        deny_since: None,
18075    },
18076    Lint {
18077        label: "clippy::dbg_macro",
18078        description: r##"Checks for usage of the [`dbg!`](https://doc.rust-lang.org/std/macro.dbg.html) macro."##,
18079        default_severity: Severity::Allow,
18080        warn_since: None,
18081        deny_since: None,
18082    },
18083    Lint {
18084        label: "clippy::debug_assert_with_mut_call",
18085        description: r##"Checks for function/method calls with a mutable
18086parameter in `debug_assert!`, `debug_assert_eq!` and `debug_assert_ne!` macros."##,
18087        default_severity: Severity::Allow,
18088        warn_since: None,
18089        deny_since: None,
18090    },
18091    Lint {
18092        label: "clippy::decimal_literal_representation",
18093        description: r##"Warns if there is a better representation for a numeric literal."##,
18094        default_severity: Severity::Allow,
18095        warn_since: None,
18096        deny_since: None,
18097    },
18098    Lint {
18099        label: "clippy::declare_interior_mutable_const",
18100        description: r##"Checks for declaration of `const` items which is interior
18101mutable (e.g., contains a `Cell`, `Mutex`, `AtomicXxxx`, etc.)."##,
18102        default_severity: Severity::Allow,
18103        warn_since: None,
18104        deny_since: None,
18105    },
18106    Lint {
18107        label: "clippy::default_constructed_unit_structs",
18108        description: r##"Checks for construction on unit struct using `default`."##,
18109        default_severity: Severity::Allow,
18110        warn_since: None,
18111        deny_since: None,
18112    },
18113    Lint {
18114        label: "clippy::default_instead_of_iter_empty",
18115        description: r##"It checks for `std::iter::Empty::default()` and suggests replacing it with
18116`std::iter::empty()`."##,
18117        default_severity: Severity::Allow,
18118        warn_since: None,
18119        deny_since: None,
18120    },
18121    Lint {
18122        label: "clippy::default_numeric_fallback",
18123        description: r##"Checks for usage of unconstrained numeric literals which may cause default numeric fallback in type
18124inference.
18125
18126Default numeric fallback means that if numeric types have not yet been bound to concrete
18127types at the end of type inference, then integer type is bound to `i32`, and similarly
18128floating type is bound to `f64`.
18129
18130See [RFC0212](https://github.com/rust-lang/rfcs/blob/master/text/0212-restore-int-fallback.md) for more information about the fallback."##,
18131        default_severity: Severity::Allow,
18132        warn_since: None,
18133        deny_since: None,
18134    },
18135    Lint {
18136        label: "clippy::default_trait_access",
18137        description: r##"Checks for literal calls to `Default::default()`."##,
18138        default_severity: Severity::Allow,
18139        warn_since: None,
18140        deny_since: None,
18141    },
18142    Lint {
18143        label: "clippy::default_union_representation",
18144        description: r##"Displays a warning when a union is declared with the default representation (without a `#[repr(C)]` attribute)."##,
18145        default_severity: Severity::Allow,
18146        warn_since: None,
18147        deny_since: None,
18148    },
18149    Lint {
18150        label: "clippy::deprecated_cfg_attr",
18151        description: r##"Checks for `#[cfg_attr(rustfmt, rustfmt_skip)]` and suggests to replace it
18152with `#[rustfmt::skip]`."##,
18153        default_severity: Severity::Allow,
18154        warn_since: None,
18155        deny_since: None,
18156    },
18157    Lint {
18158        label: "clippy::deprecated_clippy_cfg_attr",
18159        description: r##"Checks for `#[cfg_attr(feature = cargo-clippy, ...)]` and for
18160`#[cfg(feature = cargo-clippy)]` and suggests to replace it with
18161`#[cfg_attr(clippy, ...)]` or `#[cfg(clippy)]`."##,
18162        default_severity: Severity::Allow,
18163        warn_since: None,
18164        deny_since: None,
18165    },
18166    Lint {
18167        label: "clippy::deprecated_semver",
18168        description: r##"Checks for `#[deprecated]` annotations with a `since`
18169field that is not a valid semantic version. Also allows TBD to signal
18170future deprecation."##,
18171        default_severity: Severity::Allow,
18172        warn_since: None,
18173        deny_since: None,
18174    },
18175    Lint {
18176        label: "clippy::deref_addrof",
18177        description: r##"Checks for usage of `*&` and `*&mut` in expressions."##,
18178        default_severity: Severity::Allow,
18179        warn_since: None,
18180        deny_since: None,
18181    },
18182    Lint {
18183        label: "clippy::deref_by_slicing",
18184        description: r##"Checks for slicing expressions which are equivalent to dereferencing the
18185value."##,
18186        default_severity: Severity::Allow,
18187        warn_since: None,
18188        deny_since: None,
18189    },
18190    Lint {
18191        label: "clippy::derivable_impls",
18192        description: r##"Detects manual `std::default::Default` implementations that are identical to a derived implementation."##,
18193        default_severity: Severity::Allow,
18194        warn_since: None,
18195        deny_since: None,
18196    },
18197    Lint {
18198        label: "clippy::derive_ord_xor_partial_ord",
18199        description: r##"Lints against manual `PartialOrd` and `Ord` implementations for types with a derived `Ord`
18200or `PartialOrd` implementation."##,
18201        default_severity: Severity::Allow,
18202        warn_since: None,
18203        deny_since: None,
18204    },
18205    Lint {
18206        label: "clippy::derive_partial_eq_without_eq",
18207        description: r##"Checks for types that derive `PartialEq` and could implement `Eq`."##,
18208        default_severity: Severity::Allow,
18209        warn_since: None,
18210        deny_since: None,
18211    },
18212    Lint {
18213        label: "clippy::derived_hash_with_manual_eq",
18214        description: r##"Lints against manual `PartialEq` implementations for types with a derived `Hash`
18215implementation."##,
18216        default_severity: Severity::Allow,
18217        warn_since: None,
18218        deny_since: None,
18219    },
18220    Lint {
18221        label: "clippy::disallowed_macros",
18222        description: r##"Denies the configured macros in clippy.toml
18223
18224Note: Even though this lint is warn-by-default, it will only trigger if
18225macros are defined in the clippy.toml file."##,
18226        default_severity: Severity::Allow,
18227        warn_since: None,
18228        deny_since: None,
18229    },
18230    Lint {
18231        label: "clippy::disallowed_methods",
18232        description: r##"Denies the configured methods and functions in clippy.toml
18233
18234Note: Even though this lint is warn-by-default, it will only trigger if
18235methods are defined in the clippy.toml file."##,
18236        default_severity: Severity::Allow,
18237        warn_since: None,
18238        deny_since: None,
18239    },
18240    Lint {
18241        label: "clippy::disallowed_names",
18242        description: r##"Checks for usage of disallowed names for variables, such
18243as `foo`."##,
18244        default_severity: Severity::Allow,
18245        warn_since: None,
18246        deny_since: None,
18247    },
18248    Lint {
18249        label: "clippy::disallowed_script_idents",
18250        description: r##"Checks for usage of unicode scripts other than those explicitly allowed
18251by the lint config.
18252
18253This lint doesn't take into account non-text scripts such as `Unknown` and `Linear_A`.
18254It also ignores the `Common` script type.
18255While configuring, be sure to use official script name [aliases] from
18256[the list of supported scripts][supported_scripts].
18257
18258See also: [`non_ascii_idents`].
18259
18260[aliases]: http://www.unicode.org/reports/tr24/tr24-31.html#Script_Value_Aliases
18261[supported_scripts]: https://www.unicode.org/iso15924/iso15924-codes.html"##,
18262        default_severity: Severity::Allow,
18263        warn_since: None,
18264        deny_since: None,
18265    },
18266    Lint {
18267        label: "clippy::disallowed_types",
18268        description: r##"Denies the configured types in clippy.toml.
18269
18270Note: Even though this lint is warn-by-default, it will only trigger if
18271types are defined in the clippy.toml file."##,
18272        default_severity: Severity::Allow,
18273        warn_since: None,
18274        deny_since: None,
18275    },
18276    Lint {
18277        label: "clippy::diverging_sub_expression",
18278        description: r##"Checks for diverging calls that are not match arms or
18279statements."##,
18280        default_severity: Severity::Allow,
18281        warn_since: None,
18282        deny_since: None,
18283    },
18284    Lint {
18285        label: "clippy::doc_lazy_continuation",
18286        description: r##"In CommonMark Markdown, the language used to write doc comments, a
18287paragraph nested within a list or block quote does not need any line
18288after the first one to be indented or marked. The specification calls
18289this a lazy paragraph continuation."##,
18290        default_severity: Severity::Allow,
18291        warn_since: None,
18292        deny_since: None,
18293    },
18294    Lint {
18295        label: "clippy::doc_link_with_quotes",
18296        description: r##"Detects the syntax `['foo']` in documentation comments (notice quotes instead of backticks)
18297outside of code blocks"##,
18298        default_severity: Severity::Allow,
18299        warn_since: None,
18300        deny_since: None,
18301    },
18302    Lint {
18303        label: "clippy::doc_markdown",
18304        description: r##"Checks for the presence of `_`, `::` or camel-case words
18305outside ticks in documentation."##,
18306        default_severity: Severity::Allow,
18307        warn_since: None,
18308        deny_since: None,
18309    },
18310    Lint {
18311        label: "clippy::double_comparisons",
18312        description: r##"Checks for double comparisons that could be simplified to a single expression."##,
18313        default_severity: Severity::Allow,
18314        warn_since: None,
18315        deny_since: None,
18316    },
18317    Lint {
18318        label: "clippy::double_must_use",
18319        description: r##"Checks for a `#[must_use]` attribute without
18320further information on functions and methods that return a type already
18321marked as `#[must_use]`."##,
18322        default_severity: Severity::Allow,
18323        warn_since: None,
18324        deny_since: None,
18325    },
18326    Lint {
18327        label: "clippy::double_neg",
18328        description: r##"Detects expressions of the form `--x`."##,
18329        default_severity: Severity::Allow,
18330        warn_since: None,
18331        deny_since: None,
18332    },
18333    Lint {
18334        label: "clippy::double_parens",
18335        description: r##"Checks for unnecessary double parentheses."##,
18336        default_severity: Severity::Allow,
18337        warn_since: None,
18338        deny_since: None,
18339    },
18340    Lint {
18341        label: "clippy::drain_collect",
18342        description: r##"Checks for calls to `.drain()` that clear the collection, immediately followed by a call to `.collect()`.
18343
18344> Collection in this context refers to any type with a `drain` method:
18345> `Vec`, `VecDeque`, `BinaryHeap`, `HashSet`,`HashMap`, `String`"##,
18346        default_severity: Severity::Allow,
18347        warn_since: None,
18348        deny_since: None,
18349    },
18350    Lint {
18351        label: "clippy::drop_non_drop",
18352        description: r##"Checks for calls to `std::mem::drop` with a value that does not implement `Drop`."##,
18353        default_severity: Severity::Allow,
18354        warn_since: None,
18355        deny_since: None,
18356    },
18357    Lint {
18358        label: "clippy::duplicate_mod",
18359        description: r##"Checks for files that are included as modules multiple times."##,
18360        default_severity: Severity::Allow,
18361        warn_since: None,
18362        deny_since: None,
18363    },
18364    Lint {
18365        label: "clippy::duplicate_underscore_argument",
18366        description: r##"Checks for function arguments having the similar names
18367differing by an underscore."##,
18368        default_severity: Severity::Allow,
18369        warn_since: None,
18370        deny_since: None,
18371    },
18372    Lint {
18373        label: "clippy::duplicated_attributes",
18374        description: r##"Checks for attributes that appear two or more times."##,
18375        default_severity: Severity::Allow,
18376        warn_since: None,
18377        deny_since: None,
18378    },
18379    Lint {
18380        label: "clippy::duration_subsec",
18381        description: r##"Checks for calculation of subsecond microseconds or milliseconds
18382from other `Duration` methods."##,
18383        default_severity: Severity::Allow,
18384        warn_since: None,
18385        deny_since: None,
18386    },
18387    Lint {
18388        label: "clippy::eager_transmute",
18389        description: r##"Checks for integer validity checks, followed by a transmute that is (incorrectly) evaluated
18390eagerly (e.g. using `bool::then_some`)."##,
18391        default_severity: Severity::Allow,
18392        warn_since: None,
18393        deny_since: None,
18394    },
18395    Lint {
18396        label: "clippy::else_if_without_else",
18397        description: r##"Checks for usage of if expressions with an `else if` branch,
18398but without a final `else` branch."##,
18399        default_severity: Severity::Allow,
18400        warn_since: None,
18401        deny_since: None,
18402    },
18403    Lint {
18404        label: "clippy::empty_docs",
18405        description: r##"Detects documentation that is empty."##,
18406        default_severity: Severity::Allow,
18407        warn_since: None,
18408        deny_since: None,
18409    },
18410    Lint {
18411        label: "clippy::empty_drop",
18412        description: r##"Checks for empty `Drop` implementations."##,
18413        default_severity: Severity::Allow,
18414        warn_since: None,
18415        deny_since: None,
18416    },
18417    Lint {
18418        label: "clippy::empty_enum",
18419        description: r##"Checks for `enum`s with no variants, which therefore are uninhabited types
18420(cannot be instantiated).
18421
18422As of this writing, the `never_type` is still a nightly-only experimental API.
18423Therefore, this lint is only triggered if `#![feature(never_type)]` is enabled."##,
18424        default_severity: Severity::Allow,
18425        warn_since: None,
18426        deny_since: None,
18427    },
18428    Lint {
18429        label: "clippy::empty_enum_variants_with_brackets",
18430        description: r##"Finds enum variants without fields that are declared with empty brackets."##,
18431        default_severity: Severity::Allow,
18432        warn_since: None,
18433        deny_since: None,
18434    },
18435    Lint {
18436        label: "clippy::empty_line_after_doc_comments",
18437        description: r##"Checks for empty lines after doc comments."##,
18438        default_severity: Severity::Allow,
18439        warn_since: None,
18440        deny_since: None,
18441    },
18442    Lint {
18443        label: "clippy::empty_line_after_outer_attr",
18444        description: r##"Checks for empty lines after outer attributes"##,
18445        default_severity: Severity::Allow,
18446        warn_since: None,
18447        deny_since: None,
18448    },
18449    Lint {
18450        label: "clippy::empty_loop",
18451        description: r##"Checks for empty `loop` expressions."##,
18452        default_severity: Severity::Allow,
18453        warn_since: None,
18454        deny_since: None,
18455    },
18456    Lint {
18457        label: "clippy::empty_structs_with_brackets",
18458        description: r##"Finds structs without fields (a so-called empty struct) that are declared with brackets."##,
18459        default_severity: Severity::Allow,
18460        warn_since: None,
18461        deny_since: None,
18462    },
18463    Lint {
18464        label: "clippy::enum_clike_unportable_variant",
18465        description: r##"Checks for C-like enumerations that are
18466`repr(isize/usize)` and have values that don't fit into an `i32`."##,
18467        default_severity: Severity::Allow,
18468        warn_since: None,
18469        deny_since: None,
18470    },
18471    Lint {
18472        label: "clippy::enum_glob_use",
18473        description: r##"Checks for `use Enum::*`."##,
18474        default_severity: Severity::Allow,
18475        warn_since: None,
18476        deny_since: None,
18477    },
18478    Lint {
18479        label: "clippy::enum_variant_names",
18480        description: r##"Detects enumeration variants that are prefixed or suffixed
18481by the same characters."##,
18482        default_severity: Severity::Allow,
18483        warn_since: None,
18484        deny_since: None,
18485    },
18486    Lint {
18487        label: "clippy::eq_op",
18488        description: r##"Checks for equal operands to comparison, logical and
18489bitwise, difference and division binary operators (`==`, `>`, etc., `&&`,
18490`||`, `&`, `|`, `^`, `-` and `/`)."##,
18491        default_severity: Severity::Allow,
18492        warn_since: None,
18493        deny_since: None,
18494    },
18495    Lint {
18496        label: "clippy::equatable_if_let",
18497        description: r##"Checks for pattern matchings that can be expressed using equality."##,
18498        default_severity: Severity::Allow,
18499        warn_since: None,
18500        deny_since: None,
18501    },
18502    Lint {
18503        label: "clippy::erasing_op",
18504        description: r##"Checks for erasing operations, e.g., `x * 0`."##,
18505        default_severity: Severity::Allow,
18506        warn_since: None,
18507        deny_since: None,
18508    },
18509    Lint {
18510        label: "clippy::err_expect",
18511        description: r##"Checks for `.err().expect()` calls on the `Result` type."##,
18512        default_severity: Severity::Allow,
18513        warn_since: None,
18514        deny_since: None,
18515    },
18516    Lint {
18517        label: "clippy::error_impl_error",
18518        description: r##"Checks for types named `Error` that implement `Error`."##,
18519        default_severity: Severity::Allow,
18520        warn_since: None,
18521        deny_since: None,
18522    },
18523    Lint {
18524        label: "clippy::excessive_nesting",
18525        description: r##"Checks for blocks which are nested beyond a certain threshold.
18526
18527Note: Even though this lint is warn-by-default, it will only trigger if a maximum nesting level is defined in the clippy.toml file."##,
18528        default_severity: Severity::Allow,
18529        warn_since: None,
18530        deny_since: None,
18531    },
18532    Lint {
18533        label: "clippy::excessive_precision",
18534        description: r##"Checks for float literals with a precision greater
18535than that supported by the underlying type."##,
18536        default_severity: Severity::Allow,
18537        warn_since: None,
18538        deny_since: None,
18539    },
18540    Lint {
18541        label: "clippy::exhaustive_enums",
18542        description: r##"Warns on any exported `enum`s that are not tagged `#[non_exhaustive]`"##,
18543        default_severity: Severity::Allow,
18544        warn_since: None,
18545        deny_since: None,
18546    },
18547    Lint {
18548        label: "clippy::exhaustive_structs",
18549        description: r##"Warns on any exported `struct`s that are not tagged `#[non_exhaustive]`"##,
18550        default_severity: Severity::Allow,
18551        warn_since: None,
18552        deny_since: None,
18553    },
18554    Lint {
18555        label: "clippy::exit",
18556        description: r##"Detects calls to the `exit()` function which terminates the program."##,
18557        default_severity: Severity::Allow,
18558        warn_since: None,
18559        deny_since: None,
18560    },
18561    Lint {
18562        label: "clippy::expect_fun_call",
18563        description: r##"Checks for calls to `.expect(&format!(...))`, `.expect(foo(..))`,
18564etc., and suggests to use `unwrap_or_else` instead"##,
18565        default_severity: Severity::Allow,
18566        warn_since: None,
18567        deny_since: None,
18568    },
18569    Lint {
18570        label: "clippy::expect_used",
18571        description: r##"Checks for `.expect()` or `.expect_err()` calls on `Result`s and `.expect()` call on `Option`s."##,
18572        default_severity: Severity::Allow,
18573        warn_since: None,
18574        deny_since: None,
18575    },
18576    Lint {
18577        label: "clippy::expl_impl_clone_on_copy",
18578        description: r##"Checks for explicit `Clone` implementations for `Copy`
18579types."##,
18580        default_severity: Severity::Allow,
18581        warn_since: None,
18582        deny_since: None,
18583    },
18584    Lint {
18585        label: "clippy::explicit_auto_deref",
18586        description: r##"Checks for dereferencing expressions which would be covered by auto-deref."##,
18587        default_severity: Severity::Allow,
18588        warn_since: None,
18589        deny_since: None,
18590    },
18591    Lint {
18592        label: "clippy::explicit_counter_loop",
18593        description: r##"Checks `for` loops over slices with an explicit counter
18594and suggests the use of `.enumerate()`."##,
18595        default_severity: Severity::Allow,
18596        warn_since: None,
18597        deny_since: None,
18598    },
18599    Lint {
18600        label: "clippy::explicit_deref_methods",
18601        description: r##"Checks for explicit `deref()` or `deref_mut()` method calls."##,
18602        default_severity: Severity::Allow,
18603        warn_since: None,
18604        deny_since: None,
18605    },
18606    Lint {
18607        label: "clippy::explicit_into_iter_loop",
18608        description: r##"Checks for loops on `y.into_iter()` where `y` will do, and
18609suggests the latter."##,
18610        default_severity: Severity::Allow,
18611        warn_since: None,
18612        deny_since: None,
18613    },
18614    Lint {
18615        label: "clippy::explicit_iter_loop",
18616        description: r##"Checks for loops on `x.iter()` where `&x` 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_write",
18624        description: r##"Checks for usage of `write!()` / `writeln()!` which can be
18625replaced with `(e)print!()` / `(e)println!()`"##,
18626        default_severity: Severity::Allow,
18627        warn_since: None,
18628        deny_since: None,
18629    },
18630    Lint {
18631        label: "clippy::extend_from_slice",
18632        description: r##"Nothing. This lint has been deprecated"##,
18633        default_severity: Severity::Allow,
18634        warn_since: None,
18635        deny_since: None,
18636    },
18637    Lint {
18638        label: "clippy::extend_with_drain",
18639        description: r##"Checks for occurrences where one vector gets extended instead of append"##,
18640        default_severity: Severity::Allow,
18641        warn_since: None,
18642        deny_since: None,
18643    },
18644    Lint {
18645        label: "clippy::extra_unused_lifetimes",
18646        description: r##"Checks for lifetimes in generics that are never used
18647anywhere else."##,
18648        default_severity: Severity::Allow,
18649        warn_since: None,
18650        deny_since: None,
18651    },
18652    Lint {
18653        label: "clippy::extra_unused_type_parameters",
18654        description: r##"Checks for type parameters in generics that are never used anywhere else."##,
18655        default_severity: Severity::Allow,
18656        warn_since: None,
18657        deny_since: None,
18658    },
18659    Lint {
18660        label: "clippy::fallible_impl_from",
18661        description: r##"Checks for impls of `From<..>` that contain `panic!()` or `unwrap()`"##,
18662        default_severity: Severity::Allow,
18663        warn_since: None,
18664        deny_since: None,
18665    },
18666    Lint {
18667        label: "clippy::field_reassign_with_default",
18668        description: r##"Checks for immediate reassignment of fields initialized
18669with Default::default()."##,
18670        default_severity: Severity::Allow,
18671        warn_since: None,
18672        deny_since: None,
18673    },
18674    Lint {
18675        label: "clippy::field_scoped_visibility_modifiers",
18676        description: r##"Checks for usage of scoped visibility modifiers, like `pub(crate)`, on fields. These
18677make a field visible within a scope between public and private."##,
18678        default_severity: Severity::Allow,
18679        warn_since: None,
18680        deny_since: None,
18681    },
18682    Lint {
18683        label: "clippy::filetype_is_file",
18684        description: r##"Checks for `FileType::is_file()`."##,
18685        default_severity: Severity::Allow,
18686        warn_since: None,
18687        deny_since: None,
18688    },
18689    Lint {
18690        label: "clippy::filter_map_bool_then",
18691        description: r##"Checks for usage of `bool::then` in `Iterator::filter_map`."##,
18692        default_severity: Severity::Allow,
18693        warn_since: None,
18694        deny_since: None,
18695    },
18696    Lint {
18697        label: "clippy::filter_map_identity",
18698        description: r##"Checks for usage of `filter_map(|x| x)`."##,
18699        default_severity: Severity::Allow,
18700        warn_since: None,
18701        deny_since: None,
18702    },
18703    Lint {
18704        label: "clippy::filter_map_next",
18705        description: r##"Checks for usage of `_.filter_map(_).next()`."##,
18706        default_severity: Severity::Allow,
18707        warn_since: None,
18708        deny_since: None,
18709    },
18710    Lint {
18711        label: "clippy::filter_next",
18712        description: r##"Checks for usage of `_.filter(_).next()`."##,
18713        default_severity: Severity::Allow,
18714        warn_since: None,
18715        deny_since: None,
18716    },
18717    Lint {
18718        label: "clippy::flat_map_identity",
18719        description: r##"Checks for usage of `flat_map(|x| x)`."##,
18720        default_severity: Severity::Allow,
18721        warn_since: None,
18722        deny_since: None,
18723    },
18724    Lint {
18725        label: "clippy::flat_map_option",
18726        description: r##"Checks for usage of `Iterator::flat_map()` where `filter_map()` could be
18727used instead."##,
18728        default_severity: Severity::Allow,
18729        warn_since: None,
18730        deny_since: None,
18731    },
18732    Lint {
18733        label: "clippy::float_arithmetic",
18734        description: r##"Checks for float arithmetic."##,
18735        default_severity: Severity::Allow,
18736        warn_since: None,
18737        deny_since: None,
18738    },
18739    Lint {
18740        label: "clippy::float_cmp",
18741        description: r##"Checks for (in-)equality comparisons on floating-point
18742values (apart from zero), except in functions called `*eq*` (which probably
18743implement equality for a type involving floats)."##,
18744        default_severity: Severity::Allow,
18745        warn_since: None,
18746        deny_since: None,
18747    },
18748    Lint {
18749        label: "clippy::float_cmp_const",
18750        description: r##"Checks for (in-)equality comparisons on constant floating-point
18751values (apart from zero), except in functions called `*eq*` (which probably
18752implement equality for a type involving floats)."##,
18753        default_severity: Severity::Allow,
18754        warn_since: None,
18755        deny_since: None,
18756    },
18757    Lint {
18758        label: "clippy::float_equality_without_abs",
18759        description: r##"Checks for statements of the form `(a - b) < f32::EPSILON` or
18760`(a - b) < f64::EPSILON`. Notes the missing `.abs()`."##,
18761        default_severity: Severity::Allow,
18762        warn_since: None,
18763        deny_since: None,
18764    },
18765    Lint {
18766        label: "clippy::fn_address_comparisons",
18767        description: r##"Checks for comparisons with an address of a function item."##,
18768        default_severity: Severity::Allow,
18769        warn_since: None,
18770        deny_since: None,
18771    },
18772    Lint {
18773        label: "clippy::fn_params_excessive_bools",
18774        description: r##"Checks for excessive use of
18775bools in function definitions."##,
18776        default_severity: Severity::Allow,
18777        warn_since: None,
18778        deny_since: None,
18779    },
18780    Lint {
18781        label: "clippy::fn_to_numeric_cast",
18782        description: r##"Checks for casts of function pointers to something other than `usize`."##,
18783        default_severity: Severity::Allow,
18784        warn_since: None,
18785        deny_since: None,
18786    },
18787    Lint {
18788        label: "clippy::fn_to_numeric_cast_any",
18789        description: r##"Checks for casts of a function pointer to any integer type."##,
18790        default_severity: Severity::Allow,
18791        warn_since: None,
18792        deny_since: None,
18793    },
18794    Lint {
18795        label: "clippy::fn_to_numeric_cast_with_truncation",
18796        description: r##"Checks for casts of a function pointer to a numeric type not wide enough to
18797store an address."##,
18798        default_severity: Severity::Allow,
18799        warn_since: None,
18800        deny_since: None,
18801    },
18802    Lint {
18803        label: "clippy::for_kv_map",
18804        description: r##"Checks for iterating a map (`HashMap` or `BTreeMap`) and
18805ignoring either the keys or values."##,
18806        default_severity: Severity::Allow,
18807        warn_since: None,
18808        deny_since: None,
18809    },
18810    Lint {
18811        label: "clippy::forget_non_drop",
18812        description: r##"Checks for calls to `std::mem::forget` with a value that does not implement `Drop`."##,
18813        default_severity: Severity::Allow,
18814        warn_since: None,
18815        deny_since: None,
18816    },
18817    Lint {
18818        label: "clippy::format_collect",
18819        description: r##"Checks for usage of `.map(|_| format!(..)).collect::<String>()`."##,
18820        default_severity: Severity::Allow,
18821        warn_since: None,
18822        deny_since: None,
18823    },
18824    Lint {
18825        label: "clippy::format_in_format_args",
18826        description: r##"Detects `format!` within the arguments of another macro that does
18827formatting such as `format!` itself, `write!` or `println!`. Suggests
18828inlining the `format!` call."##,
18829        default_severity: Severity::Allow,
18830        warn_since: None,
18831        deny_since: None,
18832    },
18833    Lint {
18834        label: "clippy::format_push_string",
18835        description: r##"Detects cases where the result of a `format!` call is
18836appended to an existing `String`."##,
18837        default_severity: Severity::Allow,
18838        warn_since: None,
18839        deny_since: None,
18840    },
18841    Lint {
18842        label: "clippy::four_forward_slashes",
18843        description: r##"Checks for outer doc comments written with 4 forward slashes (`////`)."##,
18844        default_severity: Severity::Allow,
18845        warn_since: None,
18846        deny_since: None,
18847    },
18848    Lint {
18849        label: "clippy::from_iter_instead_of_collect",
18850        description: r##"Checks for `from_iter()` function calls on types that implement the `FromIterator`
18851trait."##,
18852        default_severity: Severity::Allow,
18853        warn_since: None,
18854        deny_since: None,
18855    },
18856    Lint {
18857        label: "clippy::from_over_into",
18858        description: r##"Searches for implementations of the `Into<..>` trait and suggests to implement `From<..>` instead."##,
18859        default_severity: Severity::Allow,
18860        warn_since: None,
18861        deny_since: None,
18862    },
18863    Lint {
18864        label: "clippy::from_raw_with_void_ptr",
18865        description: r##"Checks if we're passing a `c_void` raw pointer to `{Box,Rc,Arc,Weak}::from_raw(_)`"##,
18866        default_severity: Severity::Allow,
18867        warn_since: None,
18868        deny_since: None,
18869    },
18870    Lint {
18871        label: "clippy::from_str_radix_10",
18872        description: r##"Checks for function invocations of the form `primitive::from_str_radix(s, 10)`"##,
18873        default_severity: Severity::Allow,
18874        warn_since: None,
18875        deny_since: None,
18876    },
18877    Lint {
18878        label: "clippy::future_not_send",
18879        description: r##"This lint requires Future implementations returned from
18880functions and methods to implement the `Send` marker trait. It is mostly
18881used by library authors (public and internal) that target an audience where
18882multithreaded executors are likely to be used for running these Futures."##,
18883        default_severity: Severity::Allow,
18884        warn_since: None,
18885        deny_since: None,
18886    },
18887    Lint {
18888        label: "clippy::get_first",
18889        description: r##"Checks for usage of `x.get(0)` instead of
18890`x.first()` or `x.front()`."##,
18891        default_severity: Severity::Allow,
18892        warn_since: None,
18893        deny_since: None,
18894    },
18895    Lint {
18896        label: "clippy::get_last_with_len",
18897        description: r##"Checks for usage of `x.get(x.len() - 1)` instead of
18898`x.last()`."##,
18899        default_severity: Severity::Allow,
18900        warn_since: None,
18901        deny_since: None,
18902    },
18903    Lint {
18904        label: "clippy::get_unwrap",
18905        description: r##"Checks for usage of `.get().unwrap()` (or
18906`.get_mut().unwrap`) on a standard library type which implements `Index`"##,
18907        default_severity: Severity::Allow,
18908        warn_since: None,
18909        deny_since: None,
18910    },
18911    Lint {
18912        label: "clippy::host_endian_bytes",
18913        description: r##"Checks for the usage of the `to_ne_bytes` method and/or the function `from_ne_bytes`."##,
18914        default_severity: Severity::Allow,
18915        warn_since: None,
18916        deny_since: None,
18917    },
18918    Lint {
18919        label: "clippy::identity_op",
18920        description: r##"Checks for identity operations, e.g., `x + 0`."##,
18921        default_severity: Severity::Allow,
18922        warn_since: None,
18923        deny_since: None,
18924    },
18925    Lint {
18926        label: "clippy::if_let_mutex",
18927        description: r##"Checks for `Mutex::lock` calls in `if let` expression
18928with lock calls in any of the else blocks."##,
18929        default_severity: Severity::Allow,
18930        warn_since: None,
18931        deny_since: None,
18932    },
18933    Lint {
18934        label: "clippy::if_not_else",
18935        description: r##"Checks for usage of `!` or `!=` in an if condition with an
18936else branch."##,
18937        default_severity: Severity::Allow,
18938        warn_since: None,
18939        deny_since: None,
18940    },
18941    Lint {
18942        label: "clippy::if_same_then_else",
18943        description: r##"Checks for `if/else` with the same body as the *then* part
18944and the *else* part."##,
18945        default_severity: Severity::Allow,
18946        warn_since: None,
18947        deny_since: None,
18948    },
18949    Lint {
18950        label: "clippy::if_then_some_else_none",
18951        description: r##"Checks for if-else that could be written using either `bool::then` or `bool::then_some`."##,
18952        default_severity: Severity::Allow,
18953        warn_since: None,
18954        deny_since: None,
18955    },
18956    Lint {
18957        label: "clippy::ifs_same_cond",
18958        description: r##"Checks for consecutive `if`s with the same condition."##,
18959        default_severity: Severity::Allow,
18960        warn_since: None,
18961        deny_since: None,
18962    },
18963    Lint {
18964        label: "clippy::ignored_unit_patterns",
18965        description: r##"Checks for usage of `_` in patterns of type `()`."##,
18966        default_severity: Severity::Allow,
18967        warn_since: None,
18968        deny_since: None,
18969    },
18970    Lint {
18971        label: "clippy::impl_hash_borrow_with_str_and_bytes",
18972        description: r##"This lint is concerned with the semantics of `Borrow` and `Hash` for a
18973type that implements all three of `Hash`, `Borrow<str>` and `Borrow<[u8]>`
18974as it is impossible to satisfy the semantics of Borrow and `Hash` for
18975both `Borrow<str>` and `Borrow<[u8]>`."##,
18976        default_severity: Severity::Allow,
18977        warn_since: None,
18978        deny_since: None,
18979    },
18980    Lint {
18981        label: "clippy::impl_trait_in_params",
18982        description: r##"Lints when `impl Trait` is being used in a function's parameters."##,
18983        default_severity: Severity::Allow,
18984        warn_since: None,
18985        deny_since: None,
18986    },
18987    Lint {
18988        label: "clippy::implicit_clone",
18989        description: r##"Checks for the usage of `_.to_owned()`, `vec.to_vec()`, or similar when calling `_.clone()` would be clearer."##,
18990        default_severity: Severity::Allow,
18991        warn_since: None,
18992        deny_since: None,
18993    },
18994    Lint {
18995        label: "clippy::implicit_hasher",
18996        description: r##"Checks for public `impl` or `fn` missing generalization
18997over different hashers and implicitly defaulting to the default hashing
18998algorithm (`SipHash`)."##,
18999        default_severity: Severity::Allow,
19000        warn_since: None,
19001        deny_since: None,
19002    },
19003    Lint {
19004        label: "clippy::implicit_return",
19005        description: r##"Checks for missing return statements at the end of a block."##,
19006        default_severity: Severity::Allow,
19007        warn_since: None,
19008        deny_since: None,
19009    },
19010    Lint {
19011        label: "clippy::implicit_saturating_add",
19012        description: r##"Checks for implicit saturating addition."##,
19013        default_severity: Severity::Allow,
19014        warn_since: None,
19015        deny_since: None,
19016    },
19017    Lint {
19018        label: "clippy::implicit_saturating_sub",
19019        description: r##"Checks for implicit saturating subtraction."##,
19020        default_severity: Severity::Allow,
19021        warn_since: None,
19022        deny_since: None,
19023    },
19024    Lint {
19025        label: "clippy::implied_bounds_in_impls",
19026        description: r##"Looks for bounds in `impl Trait` in return position that are implied by other bounds.
19027This can happen when a trait is specified that another trait already has as a supertrait
19028(e.g. `fn() -> impl Deref + DerefMut<Target = i32>` has an unnecessary `Deref` bound,
19029because `Deref` is a supertrait of `DerefMut`)"##,
19030        default_severity: Severity::Allow,
19031        warn_since: None,
19032        deny_since: None,
19033    },
19034    Lint {
19035        label: "clippy::impossible_comparisons",
19036        description: r##"Checks for double comparisons that can never succeed"##,
19037        default_severity: Severity::Allow,
19038        warn_since: None,
19039        deny_since: None,
19040    },
19041    Lint {
19042        label: "clippy::imprecise_flops",
19043        description: r##"Looks for floating-point expressions that
19044can be expressed using built-in methods to improve accuracy
19045at the cost of performance."##,
19046        default_severity: Severity::Allow,
19047        warn_since: None,
19048        deny_since: None,
19049    },
19050    Lint {
19051        label: "clippy::incompatible_msrv",
19052        description: r##"This lint checks that no function newer than the defined MSRV (minimum
19053supported rust version) is used in the crate."##,
19054        default_severity: Severity::Allow,
19055        warn_since: None,
19056        deny_since: None,
19057    },
19058    Lint {
19059        label: "clippy::inconsistent_digit_grouping",
19060        description: r##"Warns if an integral or floating-point constant is
19061grouped inconsistently with underscores."##,
19062        default_severity: Severity::Allow,
19063        warn_since: None,
19064        deny_since: None,
19065    },
19066    Lint {
19067        label: "clippy::inconsistent_struct_constructor",
19068        description: r##"Checks for struct constructors where all fields are shorthand and
19069the order of the field init shorthand in the constructor is inconsistent
19070with the order in the struct definition."##,
19071        default_severity: Severity::Allow,
19072        warn_since: None,
19073        deny_since: None,
19074    },
19075    Lint {
19076        label: "clippy::index_refutable_slice",
19077        description: r##"The lint checks for slice bindings in patterns that are only used to
19078access individual slice values."##,
19079        default_severity: Severity::Allow,
19080        warn_since: None,
19081        deny_since: None,
19082    },
19083    Lint {
19084        label: "clippy::indexing_slicing",
19085        description: r##"Checks for usage of indexing or slicing. Arrays are special cases, this lint
19086does report on arrays if we can tell that slicing operations are in bounds and does not
19087lint on constant `usize` indexing on arrays because that is handled by rustc's `const_err` lint."##,
19088        default_severity: Severity::Allow,
19089        warn_since: None,
19090        deny_since: None,
19091    },
19092    Lint {
19093        label: "clippy::ineffective_bit_mask",
19094        description: r##"Checks for bit masks in comparisons which can be removed
19095without changing the outcome. The basic structure can be seen in the
19096following table:
19097
19098|Comparison| Bit Op   |Example     |equals |
19099|----------|----------|------------|-------|
19100|`>` / `<=`|`\\|` / `^`|`x \\| 2 > 3`|`x > 3`|
19101|`<` / `>=`|`\\|` / `^`|`x ^ 1 < 4` |`x < 4`|"##,
19102        default_severity: Severity::Allow,
19103        warn_since: None,
19104        deny_since: None,
19105    },
19106    Lint {
19107        label: "clippy::ineffective_open_options",
19108        description: r##"Checks if both `.write(true)` and `.append(true)` methods are called
19109on a same `OpenOptions`."##,
19110        default_severity: Severity::Allow,
19111        warn_since: None,
19112        deny_since: None,
19113    },
19114    Lint {
19115        label: "clippy::inefficient_to_string",
19116        description: r##"Checks for usage of `.to_string()` on an `&&T` where
19117`T` implements `ToString` directly (like `&&str` or `&&String`)."##,
19118        default_severity: Severity::Allow,
19119        warn_since: None,
19120        deny_since: None,
19121    },
19122    Lint {
19123        label: "clippy::infallible_destructuring_match",
19124        description: r##"Checks for matches being used to destructure a single-variant enum
19125or tuple struct where a `let` will suffice."##,
19126        default_severity: Severity::Allow,
19127        warn_since: None,
19128        deny_since: None,
19129    },
19130    Lint {
19131        label: "clippy::infinite_iter",
19132        description: r##"Checks for iteration that is guaranteed to be infinite."##,
19133        default_severity: Severity::Allow,
19134        warn_since: None,
19135        deny_since: None,
19136    },
19137    Lint {
19138        label: "clippy::infinite_loop",
19139        description: r##"Checks for infinite loops in a function where the return type is not `!`
19140and lint accordingly."##,
19141        default_severity: Severity::Allow,
19142        warn_since: None,
19143        deny_since: None,
19144    },
19145    Lint {
19146        label: "clippy::inherent_to_string",
19147        description: r##"Checks for the definition of inherent methods with a signature of `to_string(&self) -> String`."##,
19148        default_severity: Severity::Allow,
19149        warn_since: None,
19150        deny_since: None,
19151    },
19152    Lint {
19153        label: "clippy::inherent_to_string_shadow_display",
19154        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."##,
19155        default_severity: Severity::Allow,
19156        warn_since: None,
19157        deny_since: None,
19158    },
19159    Lint {
19160        label: "clippy::init_numbered_fields",
19161        description: r##"Checks for tuple structs initialized with field syntax.
19162It will however not lint if a base initializer is present.
19163The lint will also ignore code in macros."##,
19164        default_severity: Severity::Allow,
19165        warn_since: None,
19166        deny_since: None,
19167    },
19168    Lint {
19169        label: "clippy::inline_always",
19170        description: r##"Checks for items annotated with `#[inline(always)]`,
19171unless the annotated function is empty or simply panics."##,
19172        default_severity: Severity::Allow,
19173        warn_since: None,
19174        deny_since: None,
19175    },
19176    Lint {
19177        label: "clippy::inline_asm_x86_att_syntax",
19178        description: r##"Checks for usage of AT&T x86 assembly syntax."##,
19179        default_severity: Severity::Allow,
19180        warn_since: None,
19181        deny_since: None,
19182    },
19183    Lint {
19184        label: "clippy::inline_asm_x86_intel_syntax",
19185        description: r##"Checks for usage of Intel x86 assembly syntax."##,
19186        default_severity: Severity::Allow,
19187        warn_since: None,
19188        deny_since: None,
19189    },
19190    Lint {
19191        label: "clippy::inline_fn_without_body",
19192        description: r##"Checks for `#[inline]` on trait methods without bodies"##,
19193        default_severity: Severity::Allow,
19194        warn_since: None,
19195        deny_since: None,
19196    },
19197    Lint {
19198        label: "clippy::inspect_for_each",
19199        description: r##"Checks for usage of `inspect().for_each()`."##,
19200        default_severity: Severity::Allow,
19201        warn_since: None,
19202        deny_since: None,
19203    },
19204    Lint {
19205        label: "clippy::int_plus_one",
19206        description: r##"Checks for usage of `x >= y + 1` or `x - 1 >= y` (and `<=`) in a block"##,
19207        default_severity: Severity::Allow,
19208        warn_since: None,
19209        deny_since: None,
19210    },
19211    Lint {
19212        label: "clippy::integer_division",
19213        description: r##"Checks for division of integers"##,
19214        default_severity: Severity::Allow,
19215        warn_since: None,
19216        deny_since: None,
19217    },
19218    Lint {
19219        label: "clippy::integer_division_remainder_used",
19220        description: r##"Checks for the usage of division (`/`) and remainder (`%`) operations
19221when performed on any integer types using the default `Div` and `Rem` trait implementations."##,
19222        default_severity: Severity::Allow,
19223        warn_since: None,
19224        deny_since: None,
19225    },
19226    Lint {
19227        label: "clippy::into_iter_on_ref",
19228        description: r##"Checks for `into_iter` calls on references which should be replaced by `iter`
19229or `iter_mut`."##,
19230        default_severity: Severity::Allow,
19231        warn_since: None,
19232        deny_since: None,
19233    },
19234    Lint {
19235        label: "clippy::into_iter_without_iter",
19236        description: r##"This is the opposite of the `iter_without_into_iter` lint.
19237It looks for `IntoIterator for (&|&mut) Type` implementations without an inherent `iter` or `iter_mut` method
19238on the type or on any of the types in its `Deref` chain."##,
19239        default_severity: Severity::Allow,
19240        warn_since: None,
19241        deny_since: None,
19242    },
19243    Lint {
19244        label: "clippy::invalid_null_ptr_usage",
19245        description: r##"This lint checks for invalid usages of `ptr::null`."##,
19246        default_severity: Severity::Allow,
19247        warn_since: None,
19248        deny_since: None,
19249    },
19250    Lint {
19251        label: "clippy::invalid_regex",
19252        description: r##"Checks [regex](https://crates.io/crates/regex) creation
19253(with `Regex::new`, `RegexBuilder::new`, or `RegexSet::new`) for correct
19254regex syntax."##,
19255        default_severity: Severity::Allow,
19256        warn_since: None,
19257        deny_since: None,
19258    },
19259    Lint {
19260        label: "clippy::invalid_upcast_comparisons",
19261        description: r##"Checks for comparisons where the relation is always either
19262true or false, but where one side has been upcast so that the comparison is
19263necessary. Only integer types are checked."##,
19264        default_severity: Severity::Allow,
19265        warn_since: None,
19266        deny_since: None,
19267    },
19268    Lint {
19269        label: "clippy::inverted_saturating_sub",
19270        description: r##"Checks for comparisons between integers, followed by subtracting the greater value from the
19271lower one."##,
19272        default_severity: Severity::Allow,
19273        warn_since: None,
19274        deny_since: None,
19275    },
19276    Lint {
19277        label: "clippy::invisible_characters",
19278        description: r##"Checks for invisible Unicode characters in the code."##,
19279        default_severity: Severity::Allow,
19280        warn_since: None,
19281        deny_since: None,
19282    },
19283    Lint {
19284        label: "clippy::is_digit_ascii_radix",
19285        description: r##"Finds usages of [`char::is_digit`](https://doc.rust-lang.org/stable/std/primitive.char.html#method.is_digit) that
19286can be replaced with [`is_ascii_digit`](https://doc.rust-lang.org/stable/std/primitive.char.html#method.is_ascii_digit) or
19287[`is_ascii_hexdigit`](https://doc.rust-lang.org/stable/std/primitive.char.html#method.is_ascii_hexdigit)."##,
19288        default_severity: Severity::Allow,
19289        warn_since: None,
19290        deny_since: None,
19291    },
19292    Lint {
19293        label: "clippy::items_after_statements",
19294        description: r##"Checks for items declared after some statement in a block."##,
19295        default_severity: Severity::Allow,
19296        warn_since: None,
19297        deny_since: None,
19298    },
19299    Lint {
19300        label: "clippy::items_after_test_module",
19301        description: r##"Triggers if an item is declared after the testing module marked with `#[cfg(test)]`."##,
19302        default_severity: Severity::Allow,
19303        warn_since: None,
19304        deny_since: None,
19305    },
19306    Lint {
19307        label: "clippy::iter_cloned_collect",
19308        description: r##"Checks for the use of `.cloned().collect()` on slice to
19309create a `Vec`."##,
19310        default_severity: Severity::Allow,
19311        warn_since: None,
19312        deny_since: None,
19313    },
19314    Lint {
19315        label: "clippy::iter_count",
19316        description: r##"Checks for the use of `.iter().count()`."##,
19317        default_severity: Severity::Allow,
19318        warn_since: None,
19319        deny_since: None,
19320    },
19321    Lint {
19322        label: "clippy::iter_filter_is_ok",
19323        description: r##"Checks for usage of `.filter(Result::is_ok)` that may be replaced with a `.flatten()` call.
19324This lint will require additional changes to the follow-up calls as it affects the type."##,
19325        default_severity: Severity::Allow,
19326        warn_since: None,
19327        deny_since: None,
19328    },
19329    Lint {
19330        label: "clippy::iter_filter_is_some",
19331        description: r##"Checks for usage of `.filter(Option::is_some)` 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_kv_map",
19339        description: r##"Checks for iterating a map (`HashMap` or `BTreeMap`) and
19340ignoring either the keys or values."##,
19341        default_severity: Severity::Allow,
19342        warn_since: None,
19343        deny_since: None,
19344    },
19345    Lint {
19346        label: "clippy::iter_next_loop",
19347        description: r##"Checks for loops on `x.next()`."##,
19348        default_severity: Severity::Allow,
19349        warn_since: None,
19350        deny_since: None,
19351    },
19352    Lint {
19353        label: "clippy::iter_next_slice",
19354        description: r##"Checks for usage of `iter().next()` on a Slice or an Array"##,
19355        default_severity: Severity::Allow,
19356        warn_since: None,
19357        deny_since: None,
19358    },
19359    Lint {
19360        label: "clippy::iter_not_returning_iterator",
19361        description: r##"Detects methods named `iter` or `iter_mut` that do not have a return type that implements `Iterator`."##,
19362        default_severity: Severity::Allow,
19363        warn_since: None,
19364        deny_since: None,
19365    },
19366    Lint {
19367        label: "clippy::iter_nth",
19368        description: r##"Checks for usage of `.iter().nth()`/`.iter_mut().nth()` on standard library types that have
19369equivalent `.get()`/`.get_mut()` methods."##,
19370        default_severity: Severity::Allow,
19371        warn_since: None,
19372        deny_since: None,
19373    },
19374    Lint {
19375        label: "clippy::iter_nth_zero",
19376        description: r##"Checks for the use of `iter.nth(0)`."##,
19377        default_severity: Severity::Allow,
19378        warn_since: None,
19379        deny_since: None,
19380    },
19381    Lint {
19382        label: "clippy::iter_on_empty_collections",
19383        description: r##"Checks for calls to `iter`, `iter_mut` or `into_iter` on empty collections"##,
19384        default_severity: Severity::Allow,
19385        warn_since: None,
19386        deny_since: None,
19387    },
19388    Lint {
19389        label: "clippy::iter_on_single_items",
19390        description: r##"Checks for calls to `iter`, `iter_mut` or `into_iter` on collections containing a single item"##,
19391        default_severity: Severity::Allow,
19392        warn_since: None,
19393        deny_since: None,
19394    },
19395    Lint {
19396        label: "clippy::iter_out_of_bounds",
19397        description: r##"Looks for iterator combinator calls such as `.take(x)` or `.skip(x)`
19398where `x` is greater than the amount of items that an iterator will produce."##,
19399        default_severity: Severity::Allow,
19400        warn_since: None,
19401        deny_since: None,
19402    },
19403    Lint {
19404        label: "clippy::iter_over_hash_type",
19405        description: r##"This is a restriction lint which prevents the use of hash types (i.e., `HashSet` and `HashMap`) in for loops."##,
19406        default_severity: Severity::Allow,
19407        warn_since: None,
19408        deny_since: None,
19409    },
19410    Lint {
19411        label: "clippy::iter_overeager_cloned",
19412        description: r##"Checks for usage of `_.cloned().<func>()` where call to `.cloned()` can be postponed."##,
19413        default_severity: Severity::Allow,
19414        warn_since: None,
19415        deny_since: None,
19416    },
19417    Lint {
19418        label: "clippy::iter_skip_next",
19419        description: r##"Checks for usage of `.skip(x).next()` on iterators."##,
19420        default_severity: Severity::Allow,
19421        warn_since: None,
19422        deny_since: None,
19423    },
19424    Lint {
19425        label: "clippy::iter_skip_zero",
19426        description: r##"Checks for usage of `.skip(0)` on iterators."##,
19427        default_severity: Severity::Allow,
19428        warn_since: None,
19429        deny_since: None,
19430    },
19431    Lint {
19432        label: "clippy::iter_with_drain",
19433        description: r##"Checks for usage of `.drain(..)` on `Vec` and `VecDeque` for iteration."##,
19434        default_severity: Severity::Allow,
19435        warn_since: None,
19436        deny_since: None,
19437    },
19438    Lint {
19439        label: "clippy::iter_without_into_iter",
19440        description: r##"Looks for `iter` and `iter_mut` methods without an associated `IntoIterator for (&|&mut) Type` implementation."##,
19441        default_severity: Severity::Allow,
19442        warn_since: None,
19443        deny_since: None,
19444    },
19445    Lint {
19446        label: "clippy::iterator_step_by_zero",
19447        description: r##"Checks for calling `.step_by(0)` on iterators which panics."##,
19448        default_severity: Severity::Allow,
19449        warn_since: None,
19450        deny_since: None,
19451    },
19452    Lint {
19453        label: "clippy::join_absolute_paths",
19454        description: r##"Checks for calls to `Path::join` that start with a path separator (`\\\\` or `/`)."##,
19455        default_severity: Severity::Allow,
19456        warn_since: None,
19457        deny_since: None,
19458    },
19459    Lint {
19460        label: "clippy::just_underscores_and_digits",
19461        description: r##"Checks if you have variables whose name consists of just
19462underscores and digits."##,
19463        default_severity: Severity::Allow,
19464        warn_since: None,
19465        deny_since: None,
19466    },
19467    Lint {
19468        label: "clippy::large_const_arrays",
19469        description: r##"Checks for large `const` arrays that should
19470be defined as `static` instead."##,
19471        default_severity: Severity::Allow,
19472        warn_since: None,
19473        deny_since: None,
19474    },
19475    Lint {
19476        label: "clippy::large_digit_groups",
19477        description: r##"Warns if the digits of an integral or floating-point
19478constant are grouped into groups that
19479are too large."##,
19480        default_severity: Severity::Allow,
19481        warn_since: None,
19482        deny_since: None,
19483    },
19484    Lint {
19485        label: "clippy::large_enum_variant",
19486        description: r##"Checks for large size differences between variants on
19487`enum`s."##,
19488        default_severity: Severity::Allow,
19489        warn_since: None,
19490        deny_since: None,
19491    },
19492    Lint {
19493        label: "clippy::large_futures",
19494        description: r##"It checks for the size of a `Future` created by `async fn` or `async {}`."##,
19495        default_severity: Severity::Allow,
19496        warn_since: None,
19497        deny_since: None,
19498    },
19499    Lint {
19500        label: "clippy::large_include_file",
19501        description: r##"Checks for the inclusion of large files via `include_bytes!()`
19502or `include_str!()`."##,
19503        default_severity: Severity::Allow,
19504        warn_since: None,
19505        deny_since: None,
19506    },
19507    Lint {
19508        label: "clippy::large_stack_arrays",
19509        description: r##"Checks for local arrays that may be too large."##,
19510        default_severity: Severity::Allow,
19511        warn_since: None,
19512        deny_since: None,
19513    },
19514    Lint {
19515        label: "clippy::large_stack_frames",
19516        description: r##"Checks for functions that use a lot of stack space.
19517
19518This often happens when constructing a large type, such as an array with a lot of elements,
19519or constructing *many* smaller-but-still-large structs, or copying around a lot of large types.
19520
19521This lint is a more general version of [`large_stack_arrays`](https://rust-lang.github.io/rust-clippy/master/#large_stack_arrays)
19522that is intended to look at functions as a whole instead of only individual array expressions inside of a function."##,
19523        default_severity: Severity::Allow,
19524        warn_since: None,
19525        deny_since: None,
19526    },
19527    Lint {
19528        label: "clippy::large_types_passed_by_value",
19529        description: r##"Checks for functions taking arguments by value, where
19530the argument type is `Copy` and large enough to be worth considering
19531passing by reference. Does not trigger if the function is being exported,
19532because that might induce API breakage, if the parameter is declared as mutable,
19533or if the argument is a `self`."##,
19534        default_severity: Severity::Allow,
19535        warn_since: None,
19536        deny_since: None,
19537    },
19538    Lint {
19539        label: "clippy::legacy_numeric_constants",
19540        description: r##"Checks for usage of `<integer>::max_value()`, `std::<integer>::MAX`,
19541`std::<float>::EPSILON`, etc."##,
19542        default_severity: Severity::Allow,
19543        warn_since: None,
19544        deny_since: None,
19545    },
19546    Lint {
19547        label: "clippy::len_without_is_empty",
19548        description: r##"Checks for items that implement `.len()` but not
19549`.is_empty()`."##,
19550        default_severity: Severity::Allow,
19551        warn_since: None,
19552        deny_since: None,
19553    },
19554    Lint {
19555        label: "clippy::len_zero",
19556        description: r##"Checks for getting the length of something via `.len()`
19557just to compare to zero, and suggests using `.is_empty()` where applicable."##,
19558        default_severity: Severity::Allow,
19559        warn_since: None,
19560        deny_since: None,
19561    },
19562    Lint {
19563        label: "clippy::let_and_return",
19564        description: r##"Checks for `let`-bindings, which are subsequently
19565returned."##,
19566        default_severity: Severity::Allow,
19567        warn_since: None,
19568        deny_since: None,
19569    },
19570    Lint {
19571        label: "clippy::let_underscore_future",
19572        description: r##"Checks for `let _ = <expr>` where the resulting type of expr implements `Future`"##,
19573        default_severity: Severity::Allow,
19574        warn_since: None,
19575        deny_since: None,
19576    },
19577    Lint {
19578        label: "clippy::let_underscore_lock",
19579        description: r##"Checks for `let _ = sync_lock`. This supports `mutex` and `rwlock` in
19580`parking_lot`. For `std` locks see the `rustc` lint
19581[`let_underscore_lock`](https://doc.rust-lang.org/nightly/rustc/lints/listing/deny-by-default.html#let-underscore-lock)"##,
19582        default_severity: Severity::Allow,
19583        warn_since: None,
19584        deny_since: None,
19585    },
19586    Lint {
19587        label: "clippy::let_underscore_must_use",
19588        description: r##"Checks for `let _ = <expr>` where expr is `#[must_use]`"##,
19589        default_severity: Severity::Allow,
19590        warn_since: None,
19591        deny_since: None,
19592    },
19593    Lint {
19594        label: "clippy::let_underscore_untyped",
19595        description: r##"Checks for `let _ = <expr>` without a type annotation, and suggests to either provide one,
19596or remove the `let` keyword altogether."##,
19597        default_severity: Severity::Allow,
19598        warn_since: None,
19599        deny_since: None,
19600    },
19601    Lint {
19602        label: "clippy::let_unit_value",
19603        description: r##"Checks for binding a unit value."##,
19604        default_severity: Severity::Allow,
19605        warn_since: None,
19606        deny_since: None,
19607    },
19608    Lint {
19609        label: "clippy::let_with_type_underscore",
19610        description: r##"Detects when a variable is declared with an explicit type of `_`."##,
19611        default_severity: Severity::Allow,
19612        warn_since: None,
19613        deny_since: None,
19614    },
19615    Lint {
19616        label: "clippy::lines_filter_map_ok",
19617        description: r##"Checks for usage of `lines.filter_map(Result::ok)` or `lines.flat_map(Result::ok)`
19618when `lines` has type `std::io::Lines`."##,
19619        default_severity: Severity::Allow,
19620        warn_since: None,
19621        deny_since: None,
19622    },
19623    Lint {
19624        label: "clippy::linkedlist",
19625        description: r##"Checks for usage of any `LinkedList`, suggesting to use a
19626`Vec` or a `VecDeque` (formerly called `RingBuf`)."##,
19627        default_severity: Severity::Allow,
19628        warn_since: None,
19629        deny_since: None,
19630    },
19631    Lint {
19632        label: "clippy::lint_groups_priority",
19633        description: r##"Checks for lint groups with the same priority as lints in the `Cargo.toml`
19634[`[lints]` table](https://doc.rust-lang.org/cargo/reference/manifest.html#the-lints-section).
19635
19636This lint will be removed once [cargo#12918](https://github.com/rust-lang/cargo/issues/12918)
19637is resolved."##,
19638        default_severity: Severity::Allow,
19639        warn_since: None,
19640        deny_since: None,
19641    },
19642    Lint {
19643        label: "clippy::little_endian_bytes",
19644        description: r##"Checks for the usage of the `to_le_bytes` method and/or the function `from_le_bytes`."##,
19645        default_severity: Severity::Allow,
19646        warn_since: None,
19647        deny_since: None,
19648    },
19649    Lint {
19650        label: "clippy::lossy_float_literal",
19651        description: r##"Checks for whole number float literals that
19652cannot be represented as the underlying type without loss."##,
19653        default_severity: Severity::Allow,
19654        warn_since: None,
19655        deny_since: None,
19656    },
19657    Lint {
19658        label: "clippy::macro_metavars_in_unsafe",
19659        description: r##"Looks for macros that expand metavariables in an unsafe block."##,
19660        default_severity: Severity::Allow,
19661        warn_since: None,
19662        deny_since: None,
19663    },
19664    Lint {
19665        label: "clippy::macro_use_imports",
19666        description: r##"Checks for `#[macro_use] use...`."##,
19667        default_severity: Severity::Allow,
19668        warn_since: None,
19669        deny_since: None,
19670    },
19671    Lint {
19672        label: "clippy::main_recursion",
19673        description: r##"Checks for recursion using the entrypoint."##,
19674        default_severity: Severity::Allow,
19675        warn_since: None,
19676        deny_since: None,
19677    },
19678    Lint {
19679        label: "clippy::manual_assert",
19680        description: r##"Detects `if`-then-`panic!` that can be replaced with `assert!`."##,
19681        default_severity: Severity::Allow,
19682        warn_since: None,
19683        deny_since: None,
19684    },
19685    Lint {
19686        label: "clippy::manual_async_fn",
19687        description: r##"It checks for manual implementations of `async` functions."##,
19688        default_severity: Severity::Allow,
19689        warn_since: None,
19690        deny_since: None,
19691    },
19692    Lint {
19693        label: "clippy::manual_bits",
19694        description: r##"Checks for usage of `std::mem::size_of::<T>() * 8` when
19695`T::BITS` is available."##,
19696        default_severity: Severity::Allow,
19697        warn_since: None,
19698        deny_since: None,
19699    },
19700    Lint {
19701        label: "clippy::manual_c_str_literals",
19702        description: r##"Checks for the manual creation of C strings (a string with a `NUL` byte at the end), either
19703through one of the `CStr` constructor functions, or more plainly by calling `.as_ptr()`
19704on a (byte) string literal with a hardcoded `\\0` byte at the end."##,
19705        default_severity: Severity::Allow,
19706        warn_since: None,
19707        deny_since: None,
19708    },
19709    Lint {
19710        label: "clippy::manual_clamp",
19711        description: r##"Identifies good opportunities for a clamp function from std or core, and suggests using it."##,
19712        default_severity: Severity::Allow,
19713        warn_since: None,
19714        deny_since: None,
19715    },
19716    Lint {
19717        label: "clippy::manual_div_ceil",
19718        description: r##"Checks for an expression like `(x + (y - 1)) / y` which is a common manual reimplementation
19719of `x.div_ceil(y)`."##,
19720        default_severity: Severity::Allow,
19721        warn_since: None,
19722        deny_since: None,
19723    },
19724    Lint {
19725        label: "clippy::manual_filter",
19726        description: r##"Checks for usage of `match` which could be implemented using `filter`"##,
19727        default_severity: Severity::Allow,
19728        warn_since: None,
19729        deny_since: None,
19730    },
19731    Lint {
19732        label: "clippy::manual_filter_map",
19733        description: r##"Checks for usage of `_.filter(_).map(_)` that can be written more simply
19734as `filter_map(_)`."##,
19735        default_severity: Severity::Allow,
19736        warn_since: None,
19737        deny_since: None,
19738    },
19739    Lint {
19740        label: "clippy::manual_find",
19741        description: r##"Checks for manual implementations of Iterator::find"##,
19742        default_severity: Severity::Allow,
19743        warn_since: None,
19744        deny_since: None,
19745    },
19746    Lint {
19747        label: "clippy::manual_find_map",
19748        description: r##"Checks for usage of `_.find(_).map(_)` that can be written more simply
19749as `find_map(_)`."##,
19750        default_severity: Severity::Allow,
19751        warn_since: None,
19752        deny_since: None,
19753    },
19754    Lint {
19755        label: "clippy::manual_flatten",
19756        description: r##"Checks for unnecessary `if let` usage in a for loop
19757where only the `Some` or `Ok` variant of the iterator element is used."##,
19758        default_severity: Severity::Allow,
19759        warn_since: None,
19760        deny_since: None,
19761    },
19762    Lint {
19763        label: "clippy::manual_hash_one",
19764        description: r##"Checks for cases where [`BuildHasher::hash_one`] can be used.
19765
19766[`BuildHasher::hash_one`]: https://doc.rust-lang.org/std/hash/trait.BuildHasher.html#method.hash_one"##,
19767        default_severity: Severity::Allow,
19768        warn_since: None,
19769        deny_since: None,
19770    },
19771    Lint {
19772        label: "clippy::manual_inspect",
19773        description: r##"Checks for uses of `map` which return the original item."##,
19774        default_severity: Severity::Allow,
19775        warn_since: None,
19776        deny_since: None,
19777    },
19778    Lint {
19779        label: "clippy::manual_instant_elapsed",
19780        description: r##"Lints subtraction between `Instant::now()` and another `Instant`."##,
19781        default_severity: Severity::Allow,
19782        warn_since: None,
19783        deny_since: None,
19784    },
19785    Lint {
19786        label: "clippy::manual_is_ascii_check",
19787        description: r##"Suggests to use dedicated built-in methods,
19788`is_ascii_(lowercase|uppercase|digit|hexdigit)` for checking on corresponding
19789ascii range"##,
19790        default_severity: Severity::Allow,
19791        warn_since: None,
19792        deny_since: None,
19793    },
19794    Lint {
19795        label: "clippy::manual_is_finite",
19796        description: r##"Checks for manual `is_finite` reimplementations
19797(i.e., `x != <float>::INFINITY && x != <float>::NEG_INFINITY`)."##,
19798        default_severity: Severity::Allow,
19799        warn_since: None,
19800        deny_since: None,
19801    },
19802    Lint {
19803        label: "clippy::manual_is_infinite",
19804        description: r##"Checks for manual `is_infinite` 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_power_of_two",
19812        description: r##"Checks for expressions like `x.count_ones() == 1` or `x & (x - 1) == 0`, with x and unsigned integer, which are manual
19813reimplementations of `x.is_power_of_two()`."##,
19814        default_severity: Severity::Allow,
19815        warn_since: None,
19816        deny_since: None,
19817    },
19818    Lint {
19819        label: "clippy::manual_is_variant_and",
19820        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."##,
19821        default_severity: Severity::Allow,
19822        warn_since: None,
19823        deny_since: None,
19824    },
19825    Lint {
19826        label: "clippy::manual_let_else",
19827        description: r##"Warn of cases where `let...else` could be used"##,
19828        default_severity: Severity::Allow,
19829        warn_since: None,
19830        deny_since: None,
19831    },
19832    Lint {
19833        label: "clippy::manual_main_separator_str",
19834        description: r##"Checks for references on `std::path::MAIN_SEPARATOR.to_string()` used
19835to build a `&str`."##,
19836        default_severity: Severity::Allow,
19837        warn_since: None,
19838        deny_since: None,
19839    },
19840    Lint {
19841        label: "clippy::manual_map",
19842        description: r##"Checks for usage of `match` which could be implemented using `map`"##,
19843        default_severity: Severity::Allow,
19844        warn_since: None,
19845        deny_since: None,
19846    },
19847    Lint {
19848        label: "clippy::manual_memcpy",
19849        description: r##"Checks for for-loops that manually copy items between
19850slices that could be optimized by having a memcpy."##,
19851        default_severity: Severity::Allow,
19852        warn_since: None,
19853        deny_since: None,
19854    },
19855    Lint {
19856        label: "clippy::manual_next_back",
19857        description: r##"Checks for `.rev().next()` on a `DoubleEndedIterator`"##,
19858        default_severity: Severity::Allow,
19859        warn_since: None,
19860        deny_since: None,
19861    },
19862    Lint {
19863        label: "clippy::manual_non_exhaustive",
19864        description: r##"Checks for manual implementations of the non-exhaustive pattern."##,
19865        default_severity: Severity::Allow,
19866        warn_since: None,
19867        deny_since: None,
19868    },
19869    Lint {
19870        label: "clippy::manual_ok_or",
19871        description: r##"Finds patterns that reimplement `Option::ok_or`."##,
19872        default_severity: Severity::Allow,
19873        warn_since: None,
19874        deny_since: None,
19875    },
19876    Lint {
19877        label: "clippy::manual_pattern_char_comparison",
19878        description: r##"Checks for manual `char` comparison in string patterns"##,
19879        default_severity: Severity::Allow,
19880        warn_since: None,
19881        deny_since: None,
19882    },
19883    Lint {
19884        label: "clippy::manual_range_contains",
19885        description: r##"Checks for expressions like `x >= 3 && x < 8` that could
19886be more readably expressed as `(3..8).contains(x)`."##,
19887        default_severity: Severity::Allow,
19888        warn_since: None,
19889        deny_since: None,
19890    },
19891    Lint {
19892        label: "clippy::manual_range_patterns",
19893        description: r##"Looks for combined OR patterns that are all contained in a specific range,
19894e.g. `6 | 4 | 5 | 9 | 7 | 8` can be rewritten as `4..=9`."##,
19895        default_severity: Severity::Allow,
19896        warn_since: None,
19897        deny_since: None,
19898    },
19899    Lint {
19900        label: "clippy::manual_rem_euclid",
19901        description: r##"Checks for an expression like `((x % 4) + 4) % 4` which is a common manual reimplementation
19902of `x.rem_euclid(4)`."##,
19903        default_severity: Severity::Allow,
19904        warn_since: None,
19905        deny_since: None,
19906    },
19907    Lint {
19908        label: "clippy::manual_retain",
19909        description: r##"Checks for code to be replaced by `.retain()`."##,
19910        default_severity: Severity::Allow,
19911        warn_since: None,
19912        deny_since: None,
19913    },
19914    Lint {
19915        label: "clippy::manual_rotate",
19916        description: r##"It detects manual bit rotations that could be rewritten using standard
19917functions `rotate_left` or `rotate_right`."##,
19918        default_severity: Severity::Allow,
19919        warn_since: None,
19920        deny_since: None,
19921    },
19922    Lint {
19923        label: "clippy::manual_saturating_arithmetic",
19924        description: r##"Checks for `.checked_add/sub(x).unwrap_or(MAX/MIN)`."##,
19925        default_severity: Severity::Allow,
19926        warn_since: None,
19927        deny_since: None,
19928    },
19929    Lint {
19930        label: "clippy::manual_slice_size_calculation",
19931        description: r##"When `a` is `&[T]`, detect `a.len() * size_of::<T>()` and suggest `size_of_val(a)`
19932instead."##,
19933        default_severity: Severity::Allow,
19934        warn_since: None,
19935        deny_since: None,
19936    },
19937    Lint {
19938        label: "clippy::manual_split_once",
19939        description: r##"Checks for usage of `str::splitn(2, _)`"##,
19940        default_severity: Severity::Allow,
19941        warn_since: None,
19942        deny_since: None,
19943    },
19944    Lint {
19945        label: "clippy::manual_str_repeat",
19946        description: r##"Checks for manual implementations of `str::repeat`"##,
19947        default_severity: Severity::Allow,
19948        warn_since: None,
19949        deny_since: None,
19950    },
19951    Lint {
19952        label: "clippy::manual_string_new",
19953        description: r##"Checks for usage of `` to create a `String`, such as `.to_string()`, `.to_owned()`,
19954`String::from()` and others."##,
19955        default_severity: Severity::Allow,
19956        warn_since: None,
19957        deny_since: None,
19958    },
19959    Lint {
19960        label: "clippy::manual_strip",
19961        description: r##"Suggests using `strip_{prefix,suffix}` over `str::{starts,ends}_with` and slicing using
19962the pattern's length."##,
19963        default_severity: Severity::Allow,
19964        warn_since: None,
19965        deny_since: None,
19966    },
19967    Lint {
19968        label: "clippy::manual_swap",
19969        description: r##"Checks for manual swapping.
19970
19971Note that the lint will not be emitted in const blocks, as the suggestion would not be applicable."##,
19972        default_severity: Severity::Allow,
19973        warn_since: None,
19974        deny_since: None,
19975    },
19976    Lint {
19977        label: "clippy::manual_try_fold",
19978        description: r##"Checks for usage of `Iterator::fold` with a type that implements `Try`."##,
19979        default_severity: Severity::Allow,
19980        warn_since: None,
19981        deny_since: None,
19982    },
19983    Lint {
19984        label: "clippy::manual_unwrap_or",
19985        description: r##"Finds patterns that reimplement `Option::unwrap_or` or `Result::unwrap_or`."##,
19986        default_severity: Severity::Allow,
19987        warn_since: None,
19988        deny_since: None,
19989    },
19990    Lint {
19991        label: "clippy::manual_unwrap_or_default",
19992        description: r##"Checks if a `match` or `if let` expression can be simplified using
19993`.unwrap_or_default()`."##,
19994        default_severity: Severity::Allow,
19995        warn_since: None,
19996        deny_since: None,
19997    },
19998    Lint {
19999        label: "clippy::manual_while_let_some",
20000        description: r##"Looks for loops that check for emptiness of a `Vec` in the condition and pop an element
20001in the body as a separate operation."##,
20002        default_severity: Severity::Allow,
20003        warn_since: None,
20004        deny_since: None,
20005    },
20006    Lint {
20007        label: "clippy::many_single_char_names",
20008        description: r##"Checks for too many variables whose name consists of a
20009single character."##,
20010        default_severity: Severity::Allow,
20011        warn_since: None,
20012        deny_since: None,
20013    },
20014    Lint {
20015        label: "clippy::map_clone",
20016        description: r##"Checks for usage of `map(|x| x.clone())` or
20017dereferencing closures for `Copy` types, on `Iterator` or `Option`,
20018and suggests `cloned()` or `copied()` instead"##,
20019        default_severity: Severity::Allow,
20020        warn_since: None,
20021        deny_since: None,
20022    },
20023    Lint {
20024        label: "clippy::map_collect_result_unit",
20025        description: r##"Checks for usage of `_.map(_).collect::<Result<(), _>()`."##,
20026        default_severity: Severity::Allow,
20027        warn_since: None,
20028        deny_since: None,
20029    },
20030    Lint {
20031        label: "clippy::map_entry",
20032        description: r##"Checks for usage of `contains_key` + `insert` on `HashMap`
20033or `BTreeMap`."##,
20034        default_severity: Severity::Allow,
20035        warn_since: None,
20036        deny_since: None,
20037    },
20038    Lint {
20039        label: "clippy::map_err_ignore",
20040        description: r##"Checks for instances of `map_err(|_| Some::Enum)`"##,
20041        default_severity: Severity::Allow,
20042        warn_since: None,
20043        deny_since: None,
20044    },
20045    Lint {
20046        label: "clippy::map_flatten",
20047        description: r##"Checks for usage of `_.map(_).flatten(_)` on `Iterator` and `Option`"##,
20048        default_severity: Severity::Allow,
20049        warn_since: None,
20050        deny_since: None,
20051    },
20052    Lint {
20053        label: "clippy::map_identity",
20054        description: r##"Checks for instances of `map(f)` where `f` is the identity function."##,
20055        default_severity: Severity::Allow,
20056        warn_since: None,
20057        deny_since: None,
20058    },
20059    Lint {
20060        label: "clippy::map_unwrap_or",
20061        description: r##"Checks for usage of `option.map(_).unwrap_or(_)` or `option.map(_).unwrap_or_else(_)` or
20062`result.map(_).unwrap_or_else(_)`."##,
20063        default_severity: Severity::Allow,
20064        warn_since: None,
20065        deny_since: None,
20066    },
20067    Lint {
20068        label: "clippy::match_as_ref",
20069        description: r##"Checks for match which is used to add a reference to an
20070`Option` value."##,
20071        default_severity: Severity::Allow,
20072        warn_since: None,
20073        deny_since: None,
20074    },
20075    Lint {
20076        label: "clippy::match_bool",
20077        description: r##"Checks for matches where match expression is a `bool`. It
20078suggests to replace the expression with an `if...else` block."##,
20079        default_severity: Severity::Allow,
20080        warn_since: None,
20081        deny_since: None,
20082    },
20083    Lint {
20084        label: "clippy::match_like_matches_macro",
20085        description: r##"Checks for `match`  or `if let` expressions producing a
20086`bool` that could be written using `matches!`"##,
20087        default_severity: Severity::Allow,
20088        warn_since: None,
20089        deny_since: None,
20090    },
20091    Lint {
20092        label: "clippy::match_on_vec_items",
20093        description: r##"Checks for `match vec[idx]` or `match vec[n..m]`."##,
20094        default_severity: Severity::Allow,
20095        warn_since: None,
20096        deny_since: None,
20097    },
20098    Lint {
20099        label: "clippy::match_overlapping_arm",
20100        description: r##"Checks for overlapping match arms."##,
20101        default_severity: Severity::Allow,
20102        warn_since: None,
20103        deny_since: None,
20104    },
20105    Lint {
20106        label: "clippy::match_ref_pats",
20107        description: r##"Checks for matches where all arms match a reference,
20108suggesting to remove the reference and deref the matched expression
20109instead. It also checks for `if let &foo = bar` blocks."##,
20110        default_severity: Severity::Allow,
20111        warn_since: None,
20112        deny_since: None,
20113    },
20114    Lint {
20115        label: "clippy::match_result_ok",
20116        description: r##"Checks for unnecessary `ok()` in `while let`."##,
20117        default_severity: Severity::Allow,
20118        warn_since: None,
20119        deny_since: None,
20120    },
20121    Lint {
20122        label: "clippy::match_same_arms",
20123        description: r##"Checks for `match` with identical arm bodies.
20124
20125Note: Does not lint on wildcards if the `non_exhaustive_omitted_patterns_lint` feature is
20126enabled and disallowed."##,
20127        default_severity: Severity::Allow,
20128        warn_since: None,
20129        deny_since: None,
20130    },
20131    Lint {
20132        label: "clippy::match_single_binding",
20133        description: r##"Checks for useless match that binds to only one value."##,
20134        default_severity: Severity::Allow,
20135        warn_since: None,
20136        deny_since: None,
20137    },
20138    Lint {
20139        label: "clippy::match_str_case_mismatch",
20140        description: r##"Checks for `match` expressions modifying the case of a string with non-compliant arms"##,
20141        default_severity: Severity::Allow,
20142        warn_since: None,
20143        deny_since: None,
20144    },
20145    Lint {
20146        label: "clippy::match_wild_err_arm",
20147        description: r##"Checks for arm which matches all errors with `Err(_)`
20148and take drastic actions like `panic!`."##,
20149        default_severity: Severity::Allow,
20150        warn_since: None,
20151        deny_since: None,
20152    },
20153    Lint {
20154        label: "clippy::match_wildcard_for_single_variants",
20155        description: r##"Checks for wildcard enum matches for a single variant."##,
20156        default_severity: Severity::Allow,
20157        warn_since: None,
20158        deny_since: None,
20159    },
20160    Lint {
20161        label: "clippy::maybe_infinite_iter",
20162        description: r##"Checks for iteration that may be infinite."##,
20163        default_severity: Severity::Allow,
20164        warn_since: None,
20165        deny_since: None,
20166    },
20167    Lint {
20168        label: "clippy::mem_forget",
20169        description: r##"Checks for usage of `std::mem::forget(t)` where `t` is
20170`Drop` or has a field that implements `Drop`."##,
20171        default_severity: Severity::Allow,
20172        warn_since: None,
20173        deny_since: None,
20174    },
20175    Lint {
20176        label: "clippy::mem_replace_option_with_none",
20177        description: r##"Checks for `mem::replace()` on an `Option` with
20178`None`."##,
20179        default_severity: Severity::Allow,
20180        warn_since: None,
20181        deny_since: None,
20182    },
20183    Lint {
20184        label: "clippy::mem_replace_with_default",
20185        description: r##"Checks for `std::mem::replace` on a value of type
20186`T` with `T::default()`."##,
20187        default_severity: Severity::Allow,
20188        warn_since: None,
20189        deny_since: None,
20190    },
20191    Lint {
20192        label: "clippy::mem_replace_with_uninit",
20193        description: r##"Checks for `mem::replace(&mut _, mem::uninitialized())`
20194and `mem::replace(&mut _, mem::zeroed())`."##,
20195        default_severity: Severity::Allow,
20196        warn_since: None,
20197        deny_since: None,
20198    },
20199    Lint {
20200        label: "clippy::min_ident_chars",
20201        description: r##"Checks for identifiers which consist of a single character (or fewer than the configured threshold).
20202
20203Note: This lint can be very noisy when enabled; it may be desirable to only enable it
20204temporarily."##,
20205        default_severity: Severity::Allow,
20206        warn_since: None,
20207        deny_since: None,
20208    },
20209    Lint {
20210        label: "clippy::min_max",
20211        description: r##"Checks for expressions where `std::cmp::min` and `max` are
20212used to clamp values, but switched so that the result is constant."##,
20213        default_severity: Severity::Allow,
20214        warn_since: None,
20215        deny_since: None,
20216    },
20217    Lint {
20218        label: "clippy::misaligned_transmute",
20219        description: r##"Nothing. This lint has been deprecated"##,
20220        default_severity: Severity::Allow,
20221        warn_since: None,
20222        deny_since: None,
20223    },
20224    Lint {
20225        label: "clippy::mismatching_type_param_order",
20226        description: r##"Checks for type parameters which are positioned inconsistently between
20227a type definition and impl block. Specifically, a parameter in an impl
20228block which has the same name as a parameter in the type def, but is in
20229a different place."##,
20230        default_severity: Severity::Allow,
20231        warn_since: None,
20232        deny_since: None,
20233    },
20234    Lint {
20235        label: "clippy::misnamed_getters",
20236        description: r##"Checks for getter methods that return a field that doesn't correspond
20237to the name of the method, when there is a field's whose name matches that of the method."##,
20238        default_severity: Severity::Allow,
20239        warn_since: None,
20240        deny_since: None,
20241    },
20242    Lint {
20243        label: "clippy::misrefactored_assign_op",
20244        description: r##"Checks for `a op= a op b` or `a op= b op a` patterns."##,
20245        default_severity: Severity::Allow,
20246        warn_since: None,
20247        deny_since: None,
20248    },
20249    Lint {
20250        label: "clippy::missing_assert_message",
20251        description: r##"Checks assertions without a custom panic message."##,
20252        default_severity: Severity::Allow,
20253        warn_since: None,
20254        deny_since: None,
20255    },
20256    Lint {
20257        label: "clippy::missing_asserts_for_indexing",
20258        description: r##"Checks for repeated slice indexing without asserting beforehand that the length
20259is greater than the largest index used to index into the slice."##,
20260        default_severity: Severity::Allow,
20261        warn_since: None,
20262        deny_since: None,
20263    },
20264    Lint {
20265        label: "clippy::missing_const_for_fn",
20266        description: r##"Suggests the use of `const` in functions and methods where possible."##,
20267        default_severity: Severity::Allow,
20268        warn_since: None,
20269        deny_since: None,
20270    },
20271    Lint {
20272        label: "clippy::missing_const_for_thread_local",
20273        description: r##"Suggests to use `const` in `thread_local!` macro if possible."##,
20274        default_severity: Severity::Allow,
20275        warn_since: None,
20276        deny_since: None,
20277    },
20278    Lint {
20279        label: "clippy::missing_docs_in_private_items",
20280        description: r##"Warns if there is missing documentation for any private documentable item."##,
20281        default_severity: Severity::Allow,
20282        warn_since: None,
20283        deny_since: None,
20284    },
20285    Lint {
20286        label: "clippy::missing_enforced_import_renames",
20287        description: r##"Checks for imports that do not rename the item as specified
20288in the `enforced-import-renames` config option.
20289
20290Note: Even though this lint is warn-by-default, it will only trigger if
20291import renames are defined in the `clippy.toml` file."##,
20292        default_severity: Severity::Allow,
20293        warn_since: None,
20294        deny_since: None,
20295    },
20296    Lint {
20297        label: "clippy::missing_errors_doc",
20298        description: r##"Checks the doc comments of publicly visible functions that
20299return a `Result` type and warns if there is no `# Errors` section."##,
20300        default_severity: Severity::Allow,
20301        warn_since: None,
20302        deny_since: None,
20303    },
20304    Lint {
20305        label: "clippy::missing_fields_in_debug",
20306        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."##,
20307        default_severity: Severity::Allow,
20308        warn_since: None,
20309        deny_since: None,
20310    },
20311    Lint {
20312        label: "clippy::missing_inline_in_public_items",
20313        description: r##"It lints if an exported function, method, trait method with default impl,
20314or trait method impl is not `#[inline]`."##,
20315        default_severity: Severity::Allow,
20316        warn_since: None,
20317        deny_since: None,
20318    },
20319    Lint {
20320        label: "clippy::missing_panics_doc",
20321        description: r##"Checks the doc comments of publicly visible functions that
20322may panic and warns if there is no `# Panics` section."##,
20323        default_severity: Severity::Allow,
20324        warn_since: None,
20325        deny_since: None,
20326    },
20327    Lint {
20328        label: "clippy::missing_safety_doc",
20329        description: r##"Checks for the doc comments of publicly visible
20330unsafe functions and warns if there is no `# Safety` section."##,
20331        default_severity: Severity::Allow,
20332        warn_since: None,
20333        deny_since: None,
20334    },
20335    Lint {
20336        label: "clippy::missing_spin_loop",
20337        description: r##"Checks for empty spin loops"##,
20338        default_severity: Severity::Allow,
20339        warn_since: None,
20340        deny_since: None,
20341    },
20342    Lint {
20343        label: "clippy::missing_trait_methods",
20344        description: r##"Checks if a provided method is used implicitly by a trait
20345implementation."##,
20346        default_severity: Severity::Allow,
20347        warn_since: None,
20348        deny_since: None,
20349    },
20350    Lint {
20351        label: "clippy::missing_transmute_annotations",
20352        description: r##"Checks if transmute calls have all generics specified."##,
20353        default_severity: Severity::Allow,
20354        warn_since: None,
20355        deny_since: None,
20356    },
20357    Lint {
20358        label: "clippy::mistyped_literal_suffixes",
20359        description: r##"Warns for mistyped suffix in literals"##,
20360        default_severity: Severity::Allow,
20361        warn_since: None,
20362        deny_since: None,
20363    },
20364    Lint {
20365        label: "clippy::mixed_attributes_style",
20366        description: r##"Checks for items that have the same kind of attributes with mixed styles (inner/outer)."##,
20367        default_severity: Severity::Allow,
20368        warn_since: None,
20369        deny_since: None,
20370    },
20371    Lint {
20372        label: "clippy::mixed_case_hex_literals",
20373        description: r##"Warns on hexadecimal literals with mixed-case letter
20374digits."##,
20375        default_severity: Severity::Allow,
20376        warn_since: None,
20377        deny_since: None,
20378    },
20379    Lint {
20380        label: "clippy::mixed_read_write_in_expression",
20381        description: r##"Checks for a read and a write to the same variable where
20382whether the read occurs before or after the write depends on the evaluation
20383order of sub-expressions."##,
20384        default_severity: Severity::Allow,
20385        warn_since: None,
20386        deny_since: None,
20387    },
20388    Lint {
20389        label: "clippy::mod_module_files",
20390        description: r##"Checks that module layout uses only self named module files; bans `mod.rs` files."##,
20391        default_severity: Severity::Allow,
20392        warn_since: None,
20393        deny_since: None,
20394    },
20395    Lint {
20396        label: "clippy::module_inception",
20397        description: r##"Checks for modules that have the same name as their
20398parent module"##,
20399        default_severity: Severity::Allow,
20400        warn_since: None,
20401        deny_since: None,
20402    },
20403    Lint {
20404        label: "clippy::module_name_repetitions",
20405        description: r##"Detects type names that are prefixed or suffixed by the
20406containing module's name."##,
20407        default_severity: Severity::Allow,
20408        warn_since: None,
20409        deny_since: None,
20410    },
20411    Lint {
20412        label: "clippy::modulo_arithmetic",
20413        description: r##"Checks for modulo arithmetic."##,
20414        default_severity: Severity::Allow,
20415        warn_since: None,
20416        deny_since: None,
20417    },
20418    Lint {
20419        label: "clippy::modulo_one",
20420        description: r##"Checks for getting the remainder of integer division by one or minus
20421one."##,
20422        default_severity: Severity::Allow,
20423        warn_since: None,
20424        deny_since: None,
20425    },
20426    Lint {
20427        label: "clippy::multi_assignments",
20428        description: r##"Checks for nested assignments."##,
20429        default_severity: Severity::Allow,
20430        warn_since: None,
20431        deny_since: None,
20432    },
20433    Lint {
20434        label: "clippy::multiple_bound_locations",
20435        description: r##"Check if a generic is defined both in the bound predicate and in the `where` clause."##,
20436        default_severity: Severity::Allow,
20437        warn_since: None,
20438        deny_since: None,
20439    },
20440    Lint {
20441        label: "clippy::multiple_crate_versions",
20442        description: r##"Checks to see if multiple versions of a crate are being
20443used."##,
20444        default_severity: Severity::Allow,
20445        warn_since: None,
20446        deny_since: None,
20447    },
20448    Lint {
20449        label: "clippy::multiple_inherent_impl",
20450        description: r##"Checks for multiple inherent implementations of a struct"##,
20451        default_severity: Severity::Allow,
20452        warn_since: None,
20453        deny_since: None,
20454    },
20455    Lint {
20456        label: "clippy::multiple_unsafe_ops_per_block",
20457        description: r##"Checks for `unsafe` blocks that contain more than one unsafe operation."##,
20458        default_severity: Severity::Allow,
20459        warn_since: None,
20460        deny_since: None,
20461    },
20462    Lint {
20463        label: "clippy::must_use_candidate",
20464        description: r##"Checks for public functions that have no
20465`#[must_use]` attribute, but return something not already marked
20466must-use, have no mutable arg and mutate no statics."##,
20467        default_severity: Severity::Allow,
20468        warn_since: None,
20469        deny_since: None,
20470    },
20471    Lint {
20472        label: "clippy::must_use_unit",
20473        description: r##"Checks for a `#[must_use]` attribute on
20474unit-returning functions and methods."##,
20475        default_severity: Severity::Allow,
20476        warn_since: None,
20477        deny_since: None,
20478    },
20479    Lint {
20480        label: "clippy::mut_from_ref",
20481        description: r##"This lint checks for functions that take immutable references and return
20482mutable ones. This will not trigger if no unsafe code exists as there
20483are multiple safe functions which will do this transformation
20484
20485To be on the conservative side, if there's at least one mutable
20486reference with the output lifetime, this lint will not trigger."##,
20487        default_severity: Severity::Allow,
20488        warn_since: None,
20489        deny_since: None,
20490    },
20491    Lint {
20492        label: "clippy::mut_mut",
20493        description: r##"Checks for instances of `mut mut` references."##,
20494        default_severity: Severity::Allow,
20495        warn_since: None,
20496        deny_since: None,
20497    },
20498    Lint {
20499        label: "clippy::mut_mutex_lock",
20500        description: r##"Checks for `&mut Mutex::lock` calls"##,
20501        default_severity: Severity::Allow,
20502        warn_since: None,
20503        deny_since: None,
20504    },
20505    Lint {
20506        label: "clippy::mut_range_bound",
20507        description: r##"Checks for loops with a range bound that is a mutable variable."##,
20508        default_severity: Severity::Allow,
20509        warn_since: None,
20510        deny_since: None,
20511    },
20512    Lint {
20513        label: "clippy::mutable_key_type",
20514        description: r##"Checks for sets/maps with mutable key types."##,
20515        default_severity: Severity::Allow,
20516        warn_since: None,
20517        deny_since: None,
20518    },
20519    Lint {
20520        label: "clippy::mutex_atomic",
20521        description: r##"Checks for usage of `Mutex<X>` where an atomic will do."##,
20522        default_severity: Severity::Allow,
20523        warn_since: None,
20524        deny_since: None,
20525    },
20526    Lint {
20527        label: "clippy::mutex_integer",
20528        description: r##"Checks for usage of `Mutex<X>` where `X` is an integral
20529type."##,
20530        default_severity: Severity::Allow,
20531        warn_since: None,
20532        deny_since: None,
20533    },
20534    Lint {
20535        label: "clippy::naive_bytecount",
20536        description: r##"Checks for naive byte counts"##,
20537        default_severity: Severity::Allow,
20538        warn_since: None,
20539        deny_since: None,
20540    },
20541    Lint {
20542        label: "clippy::needless_arbitrary_self_type",
20543        description: r##"The lint checks for `self` in fn parameters that
20544specify the `Self`-type explicitly"##,
20545        default_severity: Severity::Allow,
20546        warn_since: None,
20547        deny_since: None,
20548    },
20549    Lint {
20550        label: "clippy::needless_bitwise_bool",
20551        description: r##"Checks for usage of bitwise and/or operators between booleans, where performance may be improved by using
20552a lazy and."##,
20553        default_severity: Severity::Allow,
20554        warn_since: None,
20555        deny_since: None,
20556    },
20557    Lint {
20558        label: "clippy::needless_bool",
20559        description: r##"Checks for expressions of the form `if c { true } else {
20560false }` (or vice versa) and suggests using the condition directly."##,
20561        default_severity: Severity::Allow,
20562        warn_since: None,
20563        deny_since: None,
20564    },
20565    Lint {
20566        label: "clippy::needless_bool_assign",
20567        description: r##"Checks for expressions of the form `if c { x = true } else { x = false }`
20568(or vice versa) and suggest assigning the variable directly from the
20569condition."##,
20570        default_severity: Severity::Allow,
20571        warn_since: None,
20572        deny_since: None,
20573    },
20574    Lint {
20575        label: "clippy::needless_borrow",
20576        description: r##"Checks for address of operations (`&`) that are going to
20577be dereferenced immediately by the compiler."##,
20578        default_severity: Severity::Allow,
20579        warn_since: None,
20580        deny_since: None,
20581    },
20582    Lint {
20583        label: "clippy::needless_borrowed_reference",
20584        description: r##"Checks for bindings that needlessly destructure a reference and borrow the inner
20585value with `&ref`."##,
20586        default_severity: Severity::Allow,
20587        warn_since: None,
20588        deny_since: None,
20589    },
20590    Lint {
20591        label: "clippy::needless_borrows_for_generic_args",
20592        description: r##"Checks for borrow operations (`&`) that are used as a generic argument to a
20593function when the borrowed value could be used."##,
20594        default_severity: Severity::Allow,
20595        warn_since: None,
20596        deny_since: None,
20597    },
20598    Lint {
20599        label: "clippy::needless_character_iteration",
20600        description: r##"Checks if an iterator is used to check if a string is ascii."##,
20601        default_severity: Severity::Allow,
20602        warn_since: None,
20603        deny_since: None,
20604    },
20605    Lint {
20606        label: "clippy::needless_collect",
20607        description: r##"Checks for functions collecting an iterator when collect
20608is not needed."##,
20609        default_severity: Severity::Allow,
20610        warn_since: None,
20611        deny_since: None,
20612    },
20613    Lint {
20614        label: "clippy::needless_continue",
20615        description: r##"The lint checks for `if`-statements appearing in loops
20616that contain a `continue` statement in either their main blocks or their
20617`else`-blocks, when omitting the `else`-block possibly with some
20618rearrangement of code can make the code easier to understand."##,
20619        default_severity: Severity::Allow,
20620        warn_since: None,
20621        deny_since: None,
20622    },
20623    Lint {
20624        label: "clippy::needless_doctest_main",
20625        description: r##"Checks for `fn main() { .. }` in doctests"##,
20626        default_severity: Severity::Allow,
20627        warn_since: None,
20628        deny_since: None,
20629    },
20630    Lint {
20631        label: "clippy::needless_else",
20632        description: r##"Checks for empty `else` branches."##,
20633        default_severity: Severity::Allow,
20634        warn_since: None,
20635        deny_since: None,
20636    },
20637    Lint {
20638        label: "clippy::needless_for_each",
20639        description: r##"Checks for usage of `for_each` that would be more simply written as a
20640`for` loop."##,
20641        default_severity: Severity::Allow,
20642        warn_since: None,
20643        deny_since: None,
20644    },
20645    Lint {
20646        label: "clippy::needless_if",
20647        description: r##"Checks for empty `if` branches with no else branch."##,
20648        default_severity: Severity::Allow,
20649        warn_since: None,
20650        deny_since: None,
20651    },
20652    Lint {
20653        label: "clippy::needless_late_init",
20654        description: r##"Checks for late initializations that can be replaced by a `let` statement
20655with an initializer."##,
20656        default_severity: Severity::Allow,
20657        warn_since: None,
20658        deny_since: None,
20659    },
20660    Lint {
20661        label: "clippy::needless_lifetimes",
20662        description: r##"Checks for lifetime annotations which can be removed by
20663relying on lifetime elision."##,
20664        default_severity: Severity::Allow,
20665        warn_since: None,
20666        deny_since: None,
20667    },
20668    Lint {
20669        label: "clippy::needless_match",
20670        description: r##"Checks for unnecessary `match` or match-like `if let` returns for `Option` and `Result`
20671when function signatures are the same."##,
20672        default_severity: Severity::Allow,
20673        warn_since: None,
20674        deny_since: None,
20675    },
20676    Lint {
20677        label: "clippy::needless_maybe_sized",
20678        description: r##"Lints `?Sized` bounds applied to type parameters that cannot be unsized"##,
20679        default_severity: Severity::Allow,
20680        warn_since: None,
20681        deny_since: None,
20682    },
20683    Lint {
20684        label: "clippy::needless_option_as_deref",
20685        description: r##"Checks for no-op uses of `Option::{as_deref, as_deref_mut}`,
20686for example, `Option<&T>::as_deref()` returns the same type."##,
20687        default_severity: Severity::Allow,
20688        warn_since: None,
20689        deny_since: None,
20690    },
20691    Lint {
20692        label: "clippy::needless_option_take",
20693        description: r##"Checks for calling `take` function after `as_ref`."##,
20694        default_severity: Severity::Allow,
20695        warn_since: None,
20696        deny_since: None,
20697    },
20698    Lint {
20699        label: "clippy::needless_parens_on_range_literals",
20700        description: r##"The lint checks for parenthesis on literals in range statements that are
20701superfluous."##,
20702        default_severity: Severity::Allow,
20703        warn_since: None,
20704        deny_since: None,
20705    },
20706    Lint {
20707        label: "clippy::needless_pass_by_ref_mut",
20708        description: r##"Check if a `&mut` function argument is actually used mutably.
20709
20710Be careful if the function is publicly reexported as it would break compatibility with
20711users of this function, when the users pass this function as an argument."##,
20712        default_severity: Severity::Allow,
20713        warn_since: None,
20714        deny_since: None,
20715    },
20716    Lint {
20717        label: "clippy::needless_pass_by_value",
20718        description: r##"Checks for functions taking arguments by value, but not
20719consuming them in its
20720body."##,
20721        default_severity: Severity::Allow,
20722        warn_since: None,
20723        deny_since: None,
20724    },
20725    Lint {
20726        label: "clippy::needless_pub_self",
20727        description: r##"Checks for usage of `pub(self)` and `pub(in self)`."##,
20728        default_severity: Severity::Allow,
20729        warn_since: None,
20730        deny_since: None,
20731    },
20732    Lint {
20733        label: "clippy::needless_question_mark",
20734        description: r##"Suggests alternatives for useless applications of `?` in terminating expressions"##,
20735        default_severity: Severity::Allow,
20736        warn_since: None,
20737        deny_since: None,
20738    },
20739    Lint {
20740        label: "clippy::needless_range_loop",
20741        description: r##"Checks for looping over the range of `0..len` of some
20742collection just to get the values by index."##,
20743        default_severity: Severity::Allow,
20744        warn_since: None,
20745        deny_since: None,
20746    },
20747    Lint {
20748        label: "clippy::needless_raw_string_hashes",
20749        description: r##"Checks for raw string literals with an unnecessary amount of hashes around them."##,
20750        default_severity: Severity::Allow,
20751        warn_since: None,
20752        deny_since: None,
20753    },
20754    Lint {
20755        label: "clippy::needless_raw_strings",
20756        description: r##"Checks for raw string literals where a string literal can be used instead."##,
20757        default_severity: Severity::Allow,
20758        warn_since: None,
20759        deny_since: None,
20760    },
20761    Lint {
20762        label: "clippy::needless_return",
20763        description: r##"Checks for return statements at the end of a block."##,
20764        default_severity: Severity::Allow,
20765        warn_since: None,
20766        deny_since: None,
20767    },
20768    Lint {
20769        label: "clippy::needless_return_with_question_mark",
20770        description: r##"Checks for return statements on `Err` paired with the `?` operator."##,
20771        default_severity: Severity::Allow,
20772        warn_since: None,
20773        deny_since: None,
20774    },
20775    Lint {
20776        label: "clippy::needless_splitn",
20777        description: r##"Checks for usage of `str::splitn` (or `str::rsplitn`) where using `str::split` would be the same."##,
20778        default_severity: Severity::Allow,
20779        warn_since: None,
20780        deny_since: None,
20781    },
20782    Lint {
20783        label: "clippy::needless_update",
20784        description: r##"Checks for needlessly including a base struct on update
20785when all fields are changed anyway.
20786
20787This lint is not applied to structs marked with
20788[non_exhaustive](https://doc.rust-lang.org/reference/attributes/type_system.html)."##,
20789        default_severity: Severity::Allow,
20790        warn_since: None,
20791        deny_since: None,
20792    },
20793    Lint {
20794        label: "clippy::neg_cmp_op_on_partial_ord",
20795        description: r##"Checks for the usage of negated comparison operators on types which only implement
20796`PartialOrd` (e.g., `f64`)."##,
20797        default_severity: Severity::Allow,
20798        warn_since: None,
20799        deny_since: None,
20800    },
20801    Lint {
20802        label: "clippy::neg_multiply",
20803        description: r##"Checks for multiplication by -1 as a form of negation."##,
20804        default_severity: Severity::Allow,
20805        warn_since: None,
20806        deny_since: None,
20807    },
20808    Lint {
20809        label: "clippy::negative_feature_names",
20810        description: r##"Checks for negative feature names with prefix `no-` or `not-`"##,
20811        default_severity: Severity::Allow,
20812        warn_since: None,
20813        deny_since: None,
20814    },
20815    Lint {
20816        label: "clippy::never_loop",
20817        description: r##"Checks for loops that will always `break`, `return` or
20818`continue` an outer loop."##,
20819        default_severity: Severity::Allow,
20820        warn_since: None,
20821        deny_since: None,
20822    },
20823    Lint {
20824        label: "clippy::new_ret_no_self",
20825        description: r##"Checks for `new` not returning a type that contains `Self`."##,
20826        default_severity: Severity::Allow,
20827        warn_since: None,
20828        deny_since: None,
20829    },
20830    Lint {
20831        label: "clippy::new_without_default",
20832        description: r##"Checks for public types with a `pub fn new() -> Self` method and no
20833implementation of
20834[`Default`](https://doc.rust-lang.org/std/default/trait.Default.html)."##,
20835        default_severity: Severity::Allow,
20836        warn_since: None,
20837        deny_since: None,
20838    },
20839    Lint {
20840        label: "clippy::no_effect",
20841        description: r##"Checks for statements which have no effect."##,
20842        default_severity: Severity::Allow,
20843        warn_since: None,
20844        deny_since: None,
20845    },
20846    Lint {
20847        label: "clippy::no_effect_replace",
20848        description: r##"Checks for `replace` statements which have no effect."##,
20849        default_severity: Severity::Allow,
20850        warn_since: None,
20851        deny_since: None,
20852    },
20853    Lint {
20854        label: "clippy::no_effect_underscore_binding",
20855        description: r##"Checks for binding to underscore prefixed variable without side-effects."##,
20856        default_severity: Severity::Allow,
20857        warn_since: None,
20858        deny_since: None,
20859    },
20860    Lint {
20861        label: "clippy::no_mangle_with_rust_abi",
20862        description: r##"Checks for Rust ABI functions with the `#[no_mangle]` attribute."##,
20863        default_severity: Severity::Allow,
20864        warn_since: None,
20865        deny_since: None,
20866    },
20867    Lint {
20868        label: "clippy::non_ascii_literal",
20869        description: r##"Checks for non-ASCII characters in string and char literals."##,
20870        default_severity: Severity::Allow,
20871        warn_since: None,
20872        deny_since: None,
20873    },
20874    Lint {
20875        label: "clippy::non_canonical_clone_impl",
20876        description: r##"Checks for non-canonical implementations of `Clone` when `Copy` is already implemented."##,
20877        default_severity: Severity::Allow,
20878        warn_since: None,
20879        deny_since: None,
20880    },
20881    Lint {
20882        label: "clippy::non_canonical_partial_ord_impl",
20883        description: r##"Checks for non-canonical implementations of `PartialOrd` when `Ord` is already implemented."##,
20884        default_severity: Severity::Allow,
20885        warn_since: None,
20886        deny_since: None,
20887    },
20888    Lint {
20889        label: "clippy::non_minimal_cfg",
20890        description: r##"Checks for `any` and `all` combinators in `cfg` with only one condition."##,
20891        default_severity: Severity::Allow,
20892        warn_since: None,
20893        deny_since: None,
20894    },
20895    Lint {
20896        label: "clippy::non_octal_unix_permissions",
20897        description: r##"Checks for non-octal values used to set Unix file permissions."##,
20898        default_severity: Severity::Allow,
20899        warn_since: None,
20900        deny_since: None,
20901    },
20902    Lint {
20903        label: "clippy::non_send_fields_in_send_ty",
20904        description: r##"This lint warns about a `Send` implementation for a type that
20905contains fields that are not safe to be sent across threads.
20906It tries to detect fields that can cause a soundness issue
20907when sent to another thread (e.g., `Rc`) while allowing `!Send` fields
20908that are expected to exist in a `Send` type, such as raw pointers."##,
20909        default_severity: Severity::Allow,
20910        warn_since: None,
20911        deny_since: None,
20912    },
20913    Lint {
20914        label: "clippy::non_zero_suggestions",
20915        description: r##"Checks for conversions from `NonZero` types to regular integer types,
20916and suggests using `NonZero` types for the target as well."##,
20917        default_severity: Severity::Allow,
20918        warn_since: None,
20919        deny_since: None,
20920    },
20921    Lint {
20922        label: "clippy::nonminimal_bool",
20923        description: r##"Checks for boolean expressions that can be written more
20924concisely."##,
20925        default_severity: Severity::Allow,
20926        warn_since: None,
20927        deny_since: None,
20928    },
20929    Lint {
20930        label: "clippy::nonsensical_open_options",
20931        description: r##"Checks for duplicate open options as well as combinations
20932that make no sense."##,
20933        default_severity: Severity::Allow,
20934        warn_since: None,
20935        deny_since: None,
20936    },
20937    Lint {
20938        label: "clippy::nonstandard_macro_braces",
20939        description: r##"Checks that common macros are used with consistent bracing."##,
20940        default_severity: Severity::Allow,
20941        warn_since: None,
20942        deny_since: None,
20943    },
20944    Lint {
20945        label: "clippy::not_unsafe_ptr_arg_deref",
20946        description: r##"Checks for public functions that dereference raw pointer
20947arguments but are not marked `unsafe`."##,
20948        default_severity: Severity::Allow,
20949        warn_since: None,
20950        deny_since: None,
20951    },
20952    Lint {
20953        label: "clippy::obfuscated_if_else",
20954        description: r##"Checks for usage of `.then_some(..).unwrap_or(..)`"##,
20955        default_severity: Severity::Allow,
20956        warn_since: None,
20957        deny_since: None,
20958    },
20959    Lint {
20960        label: "clippy::octal_escapes",
20961        description: r##"Checks for `\\0` escapes in string and byte literals that look like octal
20962character escapes in C."##,
20963        default_severity: Severity::Allow,
20964        warn_since: None,
20965        deny_since: None,
20966    },
20967    Lint {
20968        label: "clippy::ok_expect",
20969        description: r##"Checks for usage of `ok().expect(..)`."##,
20970        default_severity: Severity::Allow,
20971        warn_since: None,
20972        deny_since: None,
20973    },
20974    Lint {
20975        label: "clippy::only_used_in_recursion",
20976        description: r##"Checks for arguments that are only used in recursion with no side-effects."##,
20977        default_severity: Severity::Allow,
20978        warn_since: None,
20979        deny_since: None,
20980    },
20981    Lint {
20982        label: "clippy::op_ref",
20983        description: r##"Checks for arguments to `==` which have their address
20984taken to satisfy a bound
20985and suggests to dereference the other argument instead"##,
20986        default_severity: Severity::Allow,
20987        warn_since: None,
20988        deny_since: None,
20989    },
20990    Lint {
20991        label: "clippy::option_as_ref_cloned",
20992        description: r##"Checks for usage of `.as_ref().cloned()` and `.as_mut().cloned()` on `Option`s"##,
20993        default_severity: Severity::Allow,
20994        warn_since: None,
20995        deny_since: None,
20996    },
20997    Lint {
20998        label: "clippy::option_as_ref_deref",
20999        description: r##"Checks for usage of `_.as_ref().map(Deref::deref)` or its aliases (such as String::as_str)."##,
21000        default_severity: Severity::Allow,
21001        warn_since: None,
21002        deny_since: None,
21003    },
21004    Lint {
21005        label: "clippy::option_env_unwrap",
21006        description: r##"Checks for usage of `option_env!(...).unwrap()` and
21007suggests usage of the `env!` macro."##,
21008        default_severity: Severity::Allow,
21009        warn_since: None,
21010        deny_since: None,
21011    },
21012    Lint {
21013        label: "clippy::option_filter_map",
21014        description: r##"Checks for iterators of `Option`s using `.filter(Option::is_some).map(Option::unwrap)` that may
21015be replaced with a `.flatten()` call."##,
21016        default_severity: Severity::Allow,
21017        warn_since: None,
21018        deny_since: None,
21019    },
21020    Lint {
21021        label: "clippy::option_if_let_else",
21022        description: r##"Lints usage of `if let Some(v) = ... { y } else { x }` and
21023`match .. { Some(v) => y, None/_ => x }` which are more
21024idiomatically done with `Option::map_or` (if the else bit is a pure
21025expression) or `Option::map_or_else` (if the else bit is an impure
21026expression)."##,
21027        default_severity: Severity::Allow,
21028        warn_since: None,
21029        deny_since: None,
21030    },
21031    Lint {
21032        label: "clippy::option_map_or_err_ok",
21033        description: r##"Checks for usage of `_.map_or(Err(_), Ok)`."##,
21034        default_severity: Severity::Allow,
21035        warn_since: None,
21036        deny_since: None,
21037    },
21038    Lint {
21039        label: "clippy::option_map_or_none",
21040        description: r##"Checks for usage of `_.map_or(None, _)`."##,
21041        default_severity: Severity::Allow,
21042        warn_since: None,
21043        deny_since: None,
21044    },
21045    Lint {
21046        label: "clippy::option_map_unit_fn",
21047        description: r##"Checks for usage of `option.map(f)` where f is a function
21048or closure that returns the unit type `()`."##,
21049        default_severity: Severity::Allow,
21050        warn_since: None,
21051        deny_since: None,
21052    },
21053    Lint {
21054        label: "clippy::option_option",
21055        description: r##"Checks for usage of `Option<Option<_>>` in function signatures and type
21056definitions"##,
21057        default_severity: Severity::Allow,
21058        warn_since: None,
21059        deny_since: None,
21060    },
21061    Lint {
21062        label: "clippy::or_fun_call",
21063        description: r##"Checks for calls to `.or(foo(..))`, `.unwrap_or(foo(..))`,
21064`.or_insert(foo(..))` etc., and suggests to use `.or_else(|| foo(..))`,
21065`.unwrap_or_else(|| foo(..))`, `.unwrap_or_default()` or `.or_default()`
21066etc. instead."##,
21067        default_severity: Severity::Allow,
21068        warn_since: None,
21069        deny_since: None,
21070    },
21071    Lint {
21072        label: "clippy::or_then_unwrap",
21073        description: r##"Checks for `.or(…).unwrap()` calls to Options and Results."##,
21074        default_severity: Severity::Allow,
21075        warn_since: None,
21076        deny_since: None,
21077    },
21078    Lint {
21079        label: "clippy::out_of_bounds_indexing",
21080        description: r##"Checks for out of bounds array indexing with a constant
21081index."##,
21082        default_severity: Severity::Allow,
21083        warn_since: None,
21084        deny_since: None,
21085    },
21086    Lint {
21087        label: "clippy::overly_complex_bool_expr",
21088        description: r##"Checks for boolean expressions that contain terminals that
21089can be eliminated."##,
21090        default_severity: Severity::Allow,
21091        warn_since: None,
21092        deny_since: None,
21093    },
21094    Lint {
21095        label: "clippy::panic",
21096        description: r##"Checks for usage of `panic!`."##,
21097        default_severity: Severity::Allow,
21098        warn_since: None,
21099        deny_since: None,
21100    },
21101    Lint {
21102        label: "clippy::panic_in_result_fn",
21103        description: r##"Checks for usage of `panic!` or assertions in a function whose return type is `Result`."##,
21104        default_severity: Severity::Allow,
21105        warn_since: None,
21106        deny_since: None,
21107    },
21108    Lint {
21109        label: "clippy::panicking_overflow_checks",
21110        description: r##"Detects C-style underflow/overflow checks."##,
21111        default_severity: Severity::Allow,
21112        warn_since: None,
21113        deny_since: None,
21114    },
21115    Lint {
21116        label: "clippy::panicking_unwrap",
21117        description: r##"Checks for calls of `unwrap[_err]()` that will always fail."##,
21118        default_severity: Severity::Allow,
21119        warn_since: None,
21120        deny_since: None,
21121    },
21122    Lint {
21123        label: "clippy::partial_pub_fields",
21124        description: r##"Checks whether some but not all fields of a `struct` are public.
21125
21126Either make all fields of a type public, or make none of them public"##,
21127        default_severity: Severity::Allow,
21128        warn_since: None,
21129        deny_since: None,
21130    },
21131    Lint {
21132        label: "clippy::partialeq_ne_impl",
21133        description: r##"Checks for manual re-implementations of `PartialEq::ne`."##,
21134        default_severity: Severity::Allow,
21135        warn_since: None,
21136        deny_since: None,
21137    },
21138    Lint {
21139        label: "clippy::partialeq_to_none",
21140        description: r##"Checks for binary comparisons to a literal `Option::None`."##,
21141        default_severity: Severity::Allow,
21142        warn_since: None,
21143        deny_since: None,
21144    },
21145    Lint {
21146        label: "clippy::path_buf_push_overwrite",
21147        description: r##"* Checks for [push](https://doc.rust-lang.org/std/path/struct.PathBuf.html#method.push)
21148calls on `PathBuf` that can cause overwrites."##,
21149        default_severity: Severity::Allow,
21150        warn_since: None,
21151        deny_since: None,
21152    },
21153    Lint {
21154        label: "clippy::path_ends_with_ext",
21155        description: r##"Looks for calls to `Path::ends_with` calls where the argument looks like a file extension.
21156
21157By default, Clippy has a short list of known filenames that start with a dot
21158but aren't necessarily file extensions (e.g. the `.git` folder), which are allowed by default.
21159The `allowed-dotfiles` configuration can be used to allow additional
21160file extensions that Clippy should not lint."##,
21161        default_severity: Severity::Allow,
21162        warn_since: None,
21163        deny_since: None,
21164    },
21165    Lint {
21166        label: "clippy::pathbuf_init_then_push",
21167        description: r##"Checks for calls to `push` immediately after creating a new `PathBuf`."##,
21168        default_severity: Severity::Allow,
21169        warn_since: None,
21170        deny_since: None,
21171    },
21172    Lint {
21173        label: "clippy::pattern_type_mismatch",
21174        description: r##"Checks for patterns that aren't exact representations of the types
21175they are applied to.
21176
21177To satisfy this lint, you will have to adjust either the expression that is matched
21178against or the pattern itself, as well as the bindings that are introduced by the
21179adjusted patterns. For matching you will have to either dereference the expression
21180with the `*` operator, or amend the patterns to explicitly match against `&<pattern>`
21181or `&mut <pattern>` depending on the reference mutability. For the bindings you need
21182to use the inverse. You can leave them as plain bindings if you wish for the value
21183to be copied, but you must use `ref mut <variable>` or `ref <variable>` to construct
21184a reference into the matched structure.
21185
21186If you are looking for a way to learn about ownership semantics in more detail, it
21187is recommended to look at IDE options available to you to highlight types, lifetimes
21188and reference semantics in your code. The available tooling would expose these things
21189in a general way even outside of the various pattern matching mechanics. Of course
21190this lint can still be used to highlight areas of interest and ensure a good understanding
21191of ownership semantics."##,
21192        default_severity: Severity::Allow,
21193        warn_since: None,
21194        deny_since: None,
21195    },
21196    Lint {
21197        label: "clippy::permissions_set_readonly_false",
21198        description: r##"Checks for calls to `std::fs::Permissions.set_readonly` with argument `false`."##,
21199        default_severity: Severity::Allow,
21200        warn_since: None,
21201        deny_since: None,
21202    },
21203    Lint {
21204        label: "clippy::pointers_in_nomem_asm_block",
21205        description: r##"Checks if any pointer is being passed to an asm! block with `nomem` option."##,
21206        default_severity: Severity::Allow,
21207        warn_since: None,
21208        deny_since: None,
21209    },
21210    Lint {
21211        label: "clippy::possible_missing_comma",
21212        description: r##"Checks for possible missing comma in an array. It lints if
21213an array element is a binary operator expression and it lies on two lines."##,
21214        default_severity: Severity::Allow,
21215        warn_since: None,
21216        deny_since: None,
21217    },
21218    Lint {
21219        label: "clippy::precedence",
21220        description: r##"Checks for operations where precedence may be unclear
21221and suggests to add parentheses. Currently it catches the following:
21222* mixed usage of arithmetic and bit shifting/combining operators without
21223parentheses"##,
21224        default_severity: Severity::Allow,
21225        warn_since: None,
21226        deny_since: None,
21227    },
21228    Lint {
21229        label: "clippy::print_in_format_impl",
21230        description: r##"Checks for usage of `println`, `print`, `eprintln` or `eprint` in an
21231implementation of a formatting trait."##,
21232        default_severity: Severity::Allow,
21233        warn_since: None,
21234        deny_since: None,
21235    },
21236    Lint {
21237        label: "clippy::print_literal",
21238        description: r##"This lint warns about the use of literals as `print!`/`println!` args."##,
21239        default_severity: Severity::Allow,
21240        warn_since: None,
21241        deny_since: None,
21242    },
21243    Lint {
21244        label: "clippy::print_stderr",
21245        description: r##"Checks for printing on *stderr*. The purpose of this lint
21246is to catch debugging remnants."##,
21247        default_severity: Severity::Allow,
21248        warn_since: None,
21249        deny_since: None,
21250    },
21251    Lint {
21252        label: "clippy::print_stdout",
21253        description: r##"Checks for printing on *stdout*. 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_with_newline",
21261        description: r##"This lint warns when you use `print!()` with a format
21262string that ends in a newline."##,
21263        default_severity: Severity::Allow,
21264        warn_since: None,
21265        deny_since: None,
21266    },
21267    Lint {
21268        label: "clippy::println_empty_string",
21269        description: r##"This lint warns when you use `println!()` to
21270print a newline."##,
21271        default_severity: Severity::Allow,
21272        warn_since: None,
21273        deny_since: None,
21274    },
21275    Lint {
21276        label: "clippy::ptr_arg",
21277        description: r##"This lint checks for function arguments of type `&String`, `&Vec`,
21278`&PathBuf`, and `Cow<_>`. It will also suggest you replace `.clone()` calls
21279with the appropriate `.to_owned()`/`to_string()` calls."##,
21280        default_severity: Severity::Allow,
21281        warn_since: None,
21282        deny_since: None,
21283    },
21284    Lint {
21285        label: "clippy::ptr_as_ptr",
21286        description: r##"Checks for `as` casts between raw pointers that don't change their
21287constness, namely `*const T` to `*const U` and `*mut T` to `*mut U`."##,
21288        default_severity: Severity::Allow,
21289        warn_since: None,
21290        deny_since: None,
21291    },
21292    Lint {
21293        label: "clippy::ptr_cast_constness",
21294        description: r##"Checks for `as` casts between raw pointers that change their constness, namely `*const T` to
21295`*mut T` and `*mut T` to `*const T`."##,
21296        default_severity: Severity::Allow,
21297        warn_since: None,
21298        deny_since: None,
21299    },
21300    Lint {
21301        label: "clippy::ptr_eq",
21302        description: r##"Use `std::ptr::eq` when applicable"##,
21303        default_severity: Severity::Allow,
21304        warn_since: None,
21305        deny_since: None,
21306    },
21307    Lint {
21308        label: "clippy::ptr_offset_with_cast",
21309        description: r##"Checks for usage of the `offset` pointer method with a `usize` casted to an
21310`isize`."##,
21311        default_severity: Severity::Allow,
21312        warn_since: None,
21313        deny_since: None,
21314    },
21315    Lint {
21316        label: "clippy::pub_enum_variant_names",
21317        description: r##"Nothing. This lint has been deprecated"##,
21318        default_severity: Severity::Allow,
21319        warn_since: None,
21320        deny_since: None,
21321    },
21322    Lint {
21323        label: "clippy::pub_underscore_fields",
21324        description: r##"Checks whether any field of the struct is prefixed with an `_` (underscore) and also marked
21325`pub` (public)"##,
21326        default_severity: Severity::Allow,
21327        warn_since: None,
21328        deny_since: None,
21329    },
21330    Lint {
21331        label: "clippy::pub_use",
21332        description: r##"Restricts the usage of `pub use ...`"##,
21333        default_severity: Severity::Allow,
21334        warn_since: None,
21335        deny_since: None,
21336    },
21337    Lint {
21338        label: "clippy::pub_with_shorthand",
21339        description: r##"Checks for usage of `pub(<loc>)` with `in`."##,
21340        default_severity: Severity::Allow,
21341        warn_since: None,
21342        deny_since: None,
21343    },
21344    Lint {
21345        label: "clippy::pub_without_shorthand",
21346        description: r##"Checks for usage of `pub(<loc>)` without `in`.
21347
21348Note: As you cannot write a module's path in `pub(<loc>)`, this will only trigger on
21349`pub(super)` and the like."##,
21350        default_severity: Severity::Allow,
21351        warn_since: None,
21352        deny_since: None,
21353    },
21354    Lint {
21355        label: "clippy::question_mark",
21356        description: r##"Checks for expressions that could be replaced by the question mark operator."##,
21357        default_severity: Severity::Allow,
21358        warn_since: None,
21359        deny_since: None,
21360    },
21361    Lint {
21362        label: "clippy::question_mark_used",
21363        description: r##"Checks for expressions that use the question mark operator and rejects them."##,
21364        default_severity: Severity::Allow,
21365        warn_since: None,
21366        deny_since: None,
21367    },
21368    Lint {
21369        label: "clippy::range_minus_one",
21370        description: r##"Checks for inclusive ranges where 1 is subtracted from
21371the upper bound, e.g., `x..=(y-1)`."##,
21372        default_severity: Severity::Allow,
21373        warn_since: None,
21374        deny_since: None,
21375    },
21376    Lint {
21377        label: "clippy::range_plus_one",
21378        description: r##"Checks for exclusive ranges where 1 is added to the
21379upper 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_step_by_zero",
21386        description: r##"Nothing. This lint has been deprecated"##,
21387        default_severity: Severity::Allow,
21388        warn_since: None,
21389        deny_since: None,
21390    },
21391    Lint {
21392        label: "clippy::range_zip_with_len",
21393        description: r##"Checks for zipping a collection with the range of
21394`0.._.len()`."##,
21395        default_severity: Severity::Allow,
21396        warn_since: None,
21397        deny_since: None,
21398    },
21399    Lint {
21400        label: "clippy::rc_buffer",
21401        description: r##"Checks for `Rc<T>` and `Arc<T>` when `T` is a mutable buffer type such as `String` or `Vec`."##,
21402        default_severity: Severity::Allow,
21403        warn_since: None,
21404        deny_since: None,
21405    },
21406    Lint {
21407        label: "clippy::rc_clone_in_vec_init",
21408        description: r##"Checks for reference-counted pointers (`Arc`, `Rc`, `rc::Weak`, and `sync::Weak`)
21409in `vec![elem; len]`"##,
21410        default_severity: Severity::Allow,
21411        warn_since: None,
21412        deny_since: None,
21413    },
21414    Lint {
21415        label: "clippy::rc_mutex",
21416        description: r##"Checks for `Rc<Mutex<T>>`."##,
21417        default_severity: Severity::Allow,
21418        warn_since: None,
21419        deny_since: None,
21420    },
21421    Lint {
21422        label: "clippy::read_line_without_trim",
21423        description: r##"Looks for calls to [`Stdin::read_line`] to read a line from the standard input
21424into a string, then later attempting to use that string for an operation that will never
21425work for strings with a trailing newline character in it (e.g. parsing into a `i32`)."##,
21426        default_severity: Severity::Allow,
21427        warn_since: None,
21428        deny_since: None,
21429    },
21430    Lint {
21431        label: "clippy::read_zero_byte_vec",
21432        description: r##"This lint catches reads into a zero-length `Vec`.
21433Especially in the case of a call to `with_capacity`, this lint warns that read
21434gets the number of bytes from the `Vec`'s length, not its capacity."##,
21435        default_severity: Severity::Allow,
21436        warn_since: None,
21437        deny_since: None,
21438    },
21439    Lint {
21440        label: "clippy::readonly_write_lock",
21441        description: r##"Looks for calls to `RwLock::write` where the lock is only used for reading."##,
21442        default_severity: Severity::Allow,
21443        warn_since: None,
21444        deny_since: None,
21445    },
21446    Lint {
21447        label: "clippy::recursive_format_impl",
21448        description: r##"Checks for format trait implementations (e.g. `Display`) with a recursive call to itself
21449which uses `self` as a parameter.
21450This is typically done indirectly with the `write!` macro or with `to_string()`."##,
21451        default_severity: Severity::Allow,
21452        warn_since: None,
21453        deny_since: None,
21454    },
21455    Lint {
21456        label: "clippy::redundant_allocation",
21457        description: r##"Checks for usage of redundant allocations anywhere in the code."##,
21458        default_severity: Severity::Allow,
21459        warn_since: None,
21460        deny_since: None,
21461    },
21462    Lint {
21463        label: "clippy::redundant_as_str",
21464        description: r##"Checks for usage of `as_str()` on a `String` chained with a method available on the `String` itself."##,
21465        default_severity: Severity::Allow,
21466        warn_since: None,
21467        deny_since: None,
21468    },
21469    Lint {
21470        label: "clippy::redundant_async_block",
21471        description: r##"Checks for `async` block that only returns `await` on a future."##,
21472        default_severity: Severity::Allow,
21473        warn_since: None,
21474        deny_since: None,
21475    },
21476    Lint {
21477        label: "clippy::redundant_at_rest_pattern",
21478        description: r##"Checks for `[all @ ..]` patterns."##,
21479        default_severity: Severity::Allow,
21480        warn_since: None,
21481        deny_since: None,
21482    },
21483    Lint {
21484        label: "clippy::redundant_clone",
21485        description: r##"Checks for a redundant `clone()` (and its relatives) which clones an owned
21486value that is going to be dropped without further use."##,
21487        default_severity: Severity::Allow,
21488        warn_since: None,
21489        deny_since: None,
21490    },
21491    Lint {
21492        label: "clippy::redundant_closure",
21493        description: r##"Checks for closures which just call another function where
21494the function can be called directly. `unsafe` functions, calls where types
21495get adjusted or where the callee is marked `#[track_caller]` are ignored."##,
21496        default_severity: Severity::Allow,
21497        warn_since: None,
21498        deny_since: None,
21499    },
21500    Lint {
21501        label: "clippy::redundant_closure_call",
21502        description: r##"Detects closures called in the same expression where they
21503are defined."##,
21504        default_severity: Severity::Allow,
21505        warn_since: None,
21506        deny_since: None,
21507    },
21508    Lint {
21509        label: "clippy::redundant_closure_for_method_calls",
21510        description: r##"Checks for closures which only invoke a method on the closure
21511argument and can be replaced by referencing the method directly."##,
21512        default_severity: Severity::Allow,
21513        warn_since: None,
21514        deny_since: None,
21515    },
21516    Lint {
21517        label: "clippy::redundant_comparisons",
21518        description: r##"Checks for ineffective double comparisons against constants."##,
21519        default_severity: Severity::Allow,
21520        warn_since: None,
21521        deny_since: None,
21522    },
21523    Lint {
21524        label: "clippy::redundant_else",
21525        description: r##"Checks for `else` blocks that can be removed without changing semantics."##,
21526        default_severity: Severity::Allow,
21527        warn_since: None,
21528        deny_since: None,
21529    },
21530    Lint {
21531        label: "clippy::redundant_feature_names",
21532        description: r##"Checks for feature names with prefix `use-`, `with-` or suffix `-support`"##,
21533        default_severity: Severity::Allow,
21534        warn_since: None,
21535        deny_since: None,
21536    },
21537    Lint {
21538        label: "clippy::redundant_field_names",
21539        description: r##"Checks for fields in struct literals where shorthands
21540could be used."##,
21541        default_severity: Severity::Allow,
21542        warn_since: None,
21543        deny_since: None,
21544    },
21545    Lint {
21546        label: "clippy::redundant_guards",
21547        description: r##"Checks for unnecessary guards in match expressions."##,
21548        default_severity: Severity::Allow,
21549        warn_since: None,
21550        deny_since: None,
21551    },
21552    Lint {
21553        label: "clippy::redundant_locals",
21554        description: r##"Checks for redundant redefinitions of local bindings."##,
21555        default_severity: Severity::Allow,
21556        warn_since: None,
21557        deny_since: None,
21558    },
21559    Lint {
21560        label: "clippy::redundant_pattern",
21561        description: r##"Checks for patterns in the form `name @ _`."##,
21562        default_severity: Severity::Allow,
21563        warn_since: None,
21564        deny_since: None,
21565    },
21566    Lint {
21567        label: "clippy::redundant_pattern_matching",
21568        description: r##"Lint for redundant pattern matching over `Result`, `Option`,
21569`std::task::Poll`, `std::net::IpAddr` or `bool`s"##,
21570        default_severity: Severity::Allow,
21571        warn_since: None,
21572        deny_since: None,
21573    },
21574    Lint {
21575        label: "clippy::redundant_pub_crate",
21576        description: r##"Checks for items declared `pub(crate)` that are not crate visible because they
21577are inside a private module."##,
21578        default_severity: Severity::Allow,
21579        warn_since: None,
21580        deny_since: None,
21581    },
21582    Lint {
21583        label: "clippy::redundant_slicing",
21584        description: r##"Checks for redundant slicing expressions which use the full range, and
21585do not change the type."##,
21586        default_severity: Severity::Allow,
21587        warn_since: None,
21588        deny_since: None,
21589    },
21590    Lint {
21591        label: "clippy::redundant_static_lifetimes",
21592        description: r##"Checks for constants and statics with an explicit `'static` lifetime."##,
21593        default_severity: Severity::Allow,
21594        warn_since: None,
21595        deny_since: None,
21596    },
21597    Lint {
21598        label: "clippy::redundant_type_annotations",
21599        description: r##"Warns about needless / redundant type annotations."##,
21600        default_severity: Severity::Allow,
21601        warn_since: None,
21602        deny_since: None,
21603    },
21604    Lint {
21605        label: "clippy::ref_as_ptr",
21606        description: r##"Checks for casts of references to pointer using `as`
21607and suggests `std::ptr::from_ref` and `std::ptr::from_mut` instead."##,
21608        default_severity: Severity::Allow,
21609        warn_since: None,
21610        deny_since: None,
21611    },
21612    Lint {
21613        label: "clippy::ref_binding_to_reference",
21614        description: r##"Checks for `ref` bindings which create a reference to a reference."##,
21615        default_severity: Severity::Allow,
21616        warn_since: None,
21617        deny_since: None,
21618    },
21619    Lint {
21620        label: "clippy::ref_option",
21621        description: r##"Warns when a function signature uses `&Option<T>` instead of `Option<&T>`."##,
21622        default_severity: Severity::Allow,
21623        warn_since: None,
21624        deny_since: None,
21625    },
21626    Lint {
21627        label: "clippy::ref_option_ref",
21628        description: r##"Checks for usage of `&Option<&T>`."##,
21629        default_severity: Severity::Allow,
21630        warn_since: None,
21631        deny_since: None,
21632    },
21633    Lint {
21634        label: "clippy::ref_patterns",
21635        description: r##"Checks for usages of the `ref` keyword."##,
21636        default_severity: Severity::Allow,
21637        warn_since: None,
21638        deny_since: None,
21639    },
21640    Lint {
21641        label: "clippy::regex_macro",
21642        description: r##"Nothing. This lint has been deprecated"##,
21643        default_severity: Severity::Allow,
21644        warn_since: None,
21645        deny_since: None,
21646    },
21647    Lint {
21648        label: "clippy::renamed_function_params",
21649        description: r##"Lints when the name of function parameters from trait impl is
21650different than its default implementation."##,
21651        default_severity: Severity::Allow,
21652        warn_since: None,
21653        deny_since: None,
21654    },
21655    Lint {
21656        label: "clippy::repeat_once",
21657        description: r##"Checks for usage of `.repeat(1)` and suggest the following method for each types.
21658- `.to_string()` for `str`
21659- `.clone()` for `String`
21660- `.to_vec()` for `slice`
21661
21662The lint will evaluate constant expressions and values as arguments of `.repeat(..)` and emit a message if
21663they are equivalent to `1`. (Related discussion in [rust-clippy#7306](https://github.com/rust-lang/rust-clippy/issues/7306))"##,
21664        default_severity: Severity::Allow,
21665        warn_since: None,
21666        deny_since: None,
21667    },
21668    Lint {
21669        label: "clippy::repeat_vec_with_capacity",
21670        description: r##"Looks for patterns such as `vec![Vec::with_capacity(x); n]` or `iter::repeat(Vec::with_capacity(x))`."##,
21671        default_severity: Severity::Allow,
21672        warn_since: None,
21673        deny_since: None,
21674    },
21675    Lint {
21676        label: "clippy::replace_consts",
21677        description: r##"Nothing. This lint has been deprecated"##,
21678        default_severity: Severity::Allow,
21679        warn_since: None,
21680        deny_since: None,
21681    },
21682    Lint {
21683        label: "clippy::reserve_after_initialization",
21684        description: r##"Informs the user about a more concise way to create a vector with a known capacity."##,
21685        default_severity: Severity::Allow,
21686        warn_since: None,
21687        deny_since: None,
21688    },
21689    Lint {
21690        label: "clippy::rest_pat_in_fully_bound_structs",
21691        description: r##"Checks for unnecessary '..' pattern binding on struct when all fields are explicitly matched."##,
21692        default_severity: Severity::Allow,
21693        warn_since: None,
21694        deny_since: None,
21695    },
21696    Lint {
21697        label: "clippy::result_filter_map",
21698        description: r##"Checks for iterators of `Result`s using `.filter(Result::is_ok).map(Result::unwrap)` that may
21699be replaced with a `.flatten()` call."##,
21700        default_severity: Severity::Allow,
21701        warn_since: None,
21702        deny_since: None,
21703    },
21704    Lint {
21705        label: "clippy::result_large_err",
21706        description: r##"Checks for functions that return `Result` with an unusually large
21707`Err`-variant."##,
21708        default_severity: Severity::Allow,
21709        warn_since: None,
21710        deny_since: None,
21711    },
21712    Lint {
21713        label: "clippy::result_map_or_into_option",
21714        description: r##"Checks for usage of `_.map_or(None, Some)`."##,
21715        default_severity: Severity::Allow,
21716        warn_since: None,
21717        deny_since: None,
21718    },
21719    Lint {
21720        label: "clippy::result_map_unit_fn",
21721        description: r##"Checks for usage of `result.map(f)` where f is a function
21722or closure that returns the unit type `()`."##,
21723        default_severity: Severity::Allow,
21724        warn_since: None,
21725        deny_since: None,
21726    },
21727    Lint {
21728        label: "clippy::result_unit_err",
21729        description: r##"Checks for public functions that return a `Result`
21730with an `Err` type of `()`. It suggests using a custom type that
21731implements `std::error::Error`."##,
21732        default_severity: Severity::Allow,
21733        warn_since: None,
21734        deny_since: None,
21735    },
21736    Lint {
21737        label: "clippy::return_self_not_must_use",
21738        description: r##"This lint warns when a method returning `Self` doesn't have the `#[must_use]` attribute."##,
21739        default_severity: Severity::Allow,
21740        warn_since: None,
21741        deny_since: None,
21742    },
21743    Lint {
21744        label: "clippy::reversed_empty_ranges",
21745        description: r##"Checks for range expressions `x..y` where both `x` and `y`
21746are constant and `x` is greater to `y`. Also triggers if `x` is equal to `y` when they are conditions to a `for` loop."##,
21747        default_severity: Severity::Allow,
21748        warn_since: None,
21749        deny_since: None,
21750    },
21751    Lint {
21752        label: "clippy::same_functions_in_if_condition",
21753        description: r##"Checks for consecutive `if`s with the same function call."##,
21754        default_severity: Severity::Allow,
21755        warn_since: None,
21756        deny_since: None,
21757    },
21758    Lint {
21759        label: "clippy::same_item_push",
21760        description: r##"Checks whether a for loop is being used to push a constant
21761value into a Vec."##,
21762        default_severity: Severity::Allow,
21763        warn_since: None,
21764        deny_since: None,
21765    },
21766    Lint {
21767        label: "clippy::same_name_method",
21768        description: r##"It lints if a struct has two methods with the same name:
21769one from a trait, another not from a trait."##,
21770        default_severity: Severity::Allow,
21771        warn_since: None,
21772        deny_since: None,
21773    },
21774    Lint {
21775        label: "clippy::search_is_some",
21776        description: r##"Checks for an iterator or string search (such as `find()`,
21777`position()`, or `rposition()`) followed by a call to `is_some()` or `is_none()`."##,
21778        default_severity: Severity::Allow,
21779        warn_since: None,
21780        deny_since: None,
21781    },
21782    Lint {
21783        label: "clippy::seek_from_current",
21784        description: r##"Checks if the `seek` method of the `Seek` trait is called with `SeekFrom::Current(0)`,
21785and if it is, suggests using `stream_position` instead."##,
21786        default_severity: Severity::Allow,
21787        warn_since: None,
21788        deny_since: None,
21789    },
21790    Lint {
21791        label: "clippy::seek_to_start_instead_of_rewind",
21792        description: r##"Checks for jumps to the start of a stream that implements `Seek`
21793and uses the `seek` method providing `Start` as parameter."##,
21794        default_severity: Severity::Allow,
21795        warn_since: None,
21796        deny_since: None,
21797    },
21798    Lint {
21799        label: "clippy::self_assignment",
21800        description: r##"Checks for explicit self-assignments."##,
21801        default_severity: Severity::Allow,
21802        warn_since: None,
21803        deny_since: None,
21804    },
21805    Lint {
21806        label: "clippy::self_named_constructors",
21807        description: r##"Warns when constructors have the same name as their types."##,
21808        default_severity: Severity::Allow,
21809        warn_since: None,
21810        deny_since: None,
21811    },
21812    Lint {
21813        label: "clippy::self_named_module_files",
21814        description: r##"Checks that module layout uses only `mod.rs` files."##,
21815        default_severity: Severity::Allow,
21816        warn_since: None,
21817        deny_since: None,
21818    },
21819    Lint {
21820        label: "clippy::semicolon_if_nothing_returned",
21821        description: r##"Looks for blocks of expressions and fires if the last expression returns
21822`()` but is not followed by a semicolon."##,
21823        default_severity: Severity::Allow,
21824        warn_since: None,
21825        deny_since: None,
21826    },
21827    Lint {
21828        label: "clippy::semicolon_inside_block",
21829        description: r##"Suggests moving the semicolon after a block to the inside of the block, after its last
21830expression."##,
21831        default_severity: Severity::Allow,
21832        warn_since: None,
21833        deny_since: None,
21834    },
21835    Lint {
21836        label: "clippy::semicolon_outside_block",
21837        description: r##"Suggests moving the semicolon from a block's final expression outside of the block."##,
21838        default_severity: Severity::Allow,
21839        warn_since: None,
21840        deny_since: None,
21841    },
21842    Lint {
21843        label: "clippy::separated_literal_suffix",
21844        description: r##"Warns if literal suffixes are separated by an underscore.
21845To enforce separated literal suffix style,
21846see the `unseparated_literal_suffix` lint."##,
21847        default_severity: Severity::Allow,
21848        warn_since: None,
21849        deny_since: None,
21850    },
21851    Lint {
21852        label: "clippy::serde_api_misuse",
21853        description: r##"Checks for misuses of the serde API."##,
21854        default_severity: Severity::Allow,
21855        warn_since: None,
21856        deny_since: None,
21857    },
21858    Lint {
21859        label: "clippy::set_contains_or_insert",
21860        description: r##"Checks for usage of `contains` to see if a value is not present
21861in a set like `HashSet` or `BTreeSet`, followed by an `insert`."##,
21862        default_severity: Severity::Allow,
21863        warn_since: None,
21864        deny_since: None,
21865    },
21866    Lint {
21867        label: "clippy::shadow_reuse",
21868        description: r##"Checks for bindings that shadow other bindings already in
21869scope, while reusing the original value."##,
21870        default_severity: Severity::Allow,
21871        warn_since: None,
21872        deny_since: None,
21873    },
21874    Lint {
21875        label: "clippy::shadow_same",
21876        description: r##"Checks for bindings that shadow other bindings already in
21877scope, while just changing reference level or mutability."##,
21878        default_severity: Severity::Allow,
21879        warn_since: None,
21880        deny_since: None,
21881    },
21882    Lint {
21883        label: "clippy::shadow_unrelated",
21884        description: r##"Checks for bindings that shadow other bindings already in
21885scope, either without an initialization or with one that does not even use
21886the original value."##,
21887        default_severity: Severity::Allow,
21888        warn_since: None,
21889        deny_since: None,
21890    },
21891    Lint {
21892        label: "clippy::short_circuit_statement",
21893        description: r##"Checks for the use of short circuit boolean conditions as
21894a
21895statement."##,
21896        default_severity: Severity::Allow,
21897        warn_since: None,
21898        deny_since: None,
21899    },
21900    Lint {
21901        label: "clippy::should_assert_eq",
21902        description: r##"Nothing. This lint has been deprecated"##,
21903        default_severity: Severity::Allow,
21904        warn_since: None,
21905        deny_since: None,
21906    },
21907    Lint {
21908        label: "clippy::should_implement_trait",
21909        description: r##"Checks for methods that should live in a trait
21910implementation of a `std` trait (see [llogiq's blog
21911post](http://llogiq.github.io/2015/07/30/traits.html) for further
21912information) instead of an inherent implementation."##,
21913        default_severity: Severity::Allow,
21914        warn_since: None,
21915        deny_since: None,
21916    },
21917    Lint {
21918        label: "clippy::should_panic_without_expect",
21919        description: r##"Checks for `#[should_panic]` attributes without specifying the expected panic message."##,
21920        default_severity: Severity::Allow,
21921        warn_since: None,
21922        deny_since: None,
21923    },
21924    Lint {
21925        label: "clippy::significant_drop_in_scrutinee",
21926        description: r##"Checks for temporaries returned from function calls in a match scrutinee that have the
21927`clippy::has_significant_drop` attribute."##,
21928        default_severity: Severity::Allow,
21929        warn_since: None,
21930        deny_since: None,
21931    },
21932    Lint {
21933        label: "clippy::significant_drop_tightening",
21934        description: r##"Searches for elements marked with `#[clippy::has_significant_drop]` that could be early
21935dropped but are in fact dropped at the end of their scopes. In other words, enforces the
21936tightening of their possible lifetimes."##,
21937        default_severity: Severity::Allow,
21938        warn_since: None,
21939        deny_since: None,
21940    },
21941    Lint {
21942        label: "clippy::similar_names",
21943        description: r##"Checks for names that are very similar and thus confusing.
21944
21945Note: this lint looks for similar names throughout each
21946scope. To allow it, you need to allow it on the scope
21947level, not on the name that is reported."##,
21948        default_severity: Severity::Allow,
21949        warn_since: None,
21950        deny_since: None,
21951    },
21952    Lint {
21953        label: "clippy::single_call_fn",
21954        description: r##"Checks for functions that are only used once. Does not lint tests."##,
21955        default_severity: Severity::Allow,
21956        warn_since: None,
21957        deny_since: None,
21958    },
21959    Lint {
21960        label: "clippy::single_char_add_str",
21961        description: r##"Warns when using `push_str`/`insert_str` with a single-character string literal
21962where `push`/`insert` with a `char` would work fine."##,
21963        default_severity: Severity::Allow,
21964        warn_since: None,
21965        deny_since: None,
21966    },
21967    Lint {
21968        label: "clippy::single_char_lifetime_names",
21969        description: r##"Checks for lifetimes with names which are one character
21970long."##,
21971        default_severity: Severity::Allow,
21972        warn_since: None,
21973        deny_since: None,
21974    },
21975    Lint {
21976        label: "clippy::single_char_pattern",
21977        description: r##"Checks for string methods that receive a single-character
21978`str` as an argument, e.g., `_.split(x)`."##,
21979        default_severity: Severity::Allow,
21980        warn_since: None,
21981        deny_since: None,
21982    },
21983    Lint {
21984        label: "clippy::single_component_path_imports",
21985        description: r##"Checking for imports with single component use path."##,
21986        default_severity: Severity::Allow,
21987        warn_since: None,
21988        deny_since: None,
21989    },
21990    Lint {
21991        label: "clippy::single_element_loop",
21992        description: r##"Checks whether a for loop has a single element."##,
21993        default_severity: Severity::Allow,
21994        warn_since: None,
21995        deny_since: None,
21996    },
21997    Lint {
21998        label: "clippy::single_match",
21999        description: r##"Checks for matches with a single arm where an `if let`
22000will usually suffice.
22001
22002This intentionally does not lint if there are comments
22003inside of the other arm, so as to allow the user to document
22004why having another explicit pattern with an empty body is necessary,
22005or because the comments need to be preserved for other reasons."##,
22006        default_severity: Severity::Allow,
22007        warn_since: None,
22008        deny_since: None,
22009    },
22010    Lint {
22011        label: "clippy::single_match_else",
22012        description: r##"Checks for matches with two arms where an `if let else` will
22013usually suffice."##,
22014        default_severity: Severity::Allow,
22015        warn_since: None,
22016        deny_since: None,
22017    },
22018    Lint {
22019        label: "clippy::single_range_in_vec_init",
22020        description: r##"Checks for `Vec` or array initializations that contain only one range."##,
22021        default_severity: Severity::Allow,
22022        warn_since: None,
22023        deny_since: None,
22024    },
22025    Lint {
22026        label: "clippy::size_of_in_element_count",
22027        description: r##"Detects expressions where
22028`size_of::<T>` or `size_of_val::<T>` is used as a
22029count of elements of type `T`"##,
22030        default_severity: Severity::Allow,
22031        warn_since: None,
22032        deny_since: None,
22033    },
22034    Lint {
22035        label: "clippy::size_of_ref",
22036        description: r##"Checks for calls to `std::mem::size_of_val()` where the argument is
22037a reference to a reference."##,
22038        default_severity: Severity::Allow,
22039        warn_since: None,
22040        deny_since: None,
22041    },
22042    Lint {
22043        label: "clippy::skip_while_next",
22044        description: r##"Checks for usage of `_.skip_while(condition).next()`."##,
22045        default_severity: Severity::Allow,
22046        warn_since: None,
22047        deny_since: None,
22048    },
22049    Lint {
22050        label: "clippy::slow_vector_initialization",
22051        description: r##"Checks slow zero-filled vector initialization"##,
22052        default_severity: Severity::Allow,
22053        warn_since: None,
22054        deny_since: None,
22055    },
22056    Lint {
22057        label: "clippy::stable_sort_primitive",
22058        description: r##"When sorting primitive values (integers, bools, chars, as well
22059as arrays, slices, and tuples of such items), it is typically better to
22060use an unstable sort than a stable sort."##,
22061        default_severity: Severity::Allow,
22062        warn_since: None,
22063        deny_since: None,
22064    },
22065    Lint {
22066        label: "clippy::std_instead_of_alloc",
22067        description: r##"Finds items imported through `std` when available through `alloc`."##,
22068        default_severity: Severity::Allow,
22069        warn_since: None,
22070        deny_since: None,
22071    },
22072    Lint {
22073        label: "clippy::std_instead_of_core",
22074        description: r##"Finds items imported through `std` when available through `core`."##,
22075        default_severity: Severity::Allow,
22076        warn_since: None,
22077        deny_since: None,
22078    },
22079    Lint {
22080        label: "clippy::str_split_at_newline",
22081        description: r##"Checks for usages of `str.trim().split(\
22082)` and `str.trim().split(\\
22083)`."##,
22084        default_severity: Severity::Allow,
22085        warn_since: None,
22086        deny_since: None,
22087    },
22088    Lint {
22089        label: "clippy::str_to_string",
22090        description: r##"This lint checks for `.to_string()` method calls on values of type `&str`."##,
22091        default_severity: Severity::Allow,
22092        warn_since: None,
22093        deny_since: None,
22094    },
22095    Lint {
22096        label: "clippy::string_add",
22097        description: r##"Checks for all instances of `x + _` where `x` is of type
22098`String`, but only if [`string_add_assign`](#string_add_assign) does *not*
22099match."##,
22100        default_severity: Severity::Allow,
22101        warn_since: None,
22102        deny_since: None,
22103    },
22104    Lint {
22105        label: "clippy::string_add_assign",
22106        description: r##"Checks for string appends of the form `x = x + y` (without
22107`let`!)."##,
22108        default_severity: Severity::Allow,
22109        warn_since: None,
22110        deny_since: None,
22111    },
22112    Lint {
22113        label: "clippy::string_extend_chars",
22114        description: r##"Checks for the use of `.extend(s.chars())` where s is a
22115`&str` or `String`."##,
22116        default_severity: Severity::Allow,
22117        warn_since: None,
22118        deny_since: None,
22119    },
22120    Lint {
22121        label: "clippy::string_from_utf8_as_bytes",
22122        description: r##"Check if the string is transformed to byte array and casted back to string."##,
22123        default_severity: Severity::Allow,
22124        warn_since: None,
22125        deny_since: None,
22126    },
22127    Lint {
22128        label: "clippy::string_lit_as_bytes",
22129        description: r##"Checks for the `as_bytes` method called on string literals
22130that contain only ASCII characters."##,
22131        default_severity: Severity::Allow,
22132        warn_since: None,
22133        deny_since: None,
22134    },
22135    Lint {
22136        label: "clippy::string_lit_chars_any",
22137        description: r##"Checks for `<string_lit>.chars().any(|i| i == c)`."##,
22138        default_severity: Severity::Allow,
22139        warn_since: None,
22140        deny_since: None,
22141    },
22142    Lint {
22143        label: "clippy::string_slice",
22144        description: r##"Checks for slice operations on strings"##,
22145        default_severity: Severity::Allow,
22146        warn_since: None,
22147        deny_since: None,
22148    },
22149    Lint {
22150        label: "clippy::string_to_string",
22151        description: r##"This lint checks for `.to_string()` method calls on values of type `String`."##,
22152        default_severity: Severity::Allow,
22153        warn_since: None,
22154        deny_since: None,
22155    },
22156    Lint {
22157        label: "clippy::strlen_on_c_strings",
22158        description: r##"Checks for usage of `libc::strlen` on a `CString` or `CStr` value,
22159and suggest calling `as_bytes().len()` or `to_bytes().len()` respectively instead."##,
22160        default_severity: Severity::Allow,
22161        warn_since: None,
22162        deny_since: None,
22163    },
22164    Lint {
22165        label: "clippy::struct_excessive_bools",
22166        description: r##"Checks for excessive
22167use of bools in structs."##,
22168        default_severity: Severity::Allow,
22169        warn_since: None,
22170        deny_since: None,
22171    },
22172    Lint {
22173        label: "clippy::struct_field_names",
22174        description: r##"Detects struct fields that are prefixed or suffixed
22175by the same characters or the name of the struct itself."##,
22176        default_severity: Severity::Allow,
22177        warn_since: None,
22178        deny_since: None,
22179    },
22180    Lint {
22181        label: "clippy::suboptimal_flops",
22182        description: r##"Looks for floating-point expressions that
22183can be expressed using built-in methods to improve both
22184accuracy and performance."##,
22185        default_severity: Severity::Allow,
22186        warn_since: None,
22187        deny_since: None,
22188    },
22189    Lint {
22190        label: "clippy::suspicious_arithmetic_impl",
22191        description: r##"Lints for suspicious operations in impls of arithmetic operators, e.g.
22192subtracting elements in an Add impl."##,
22193        default_severity: Severity::Allow,
22194        warn_since: None,
22195        deny_since: None,
22196    },
22197    Lint {
22198        label: "clippy::suspicious_assignment_formatting",
22199        description: r##"Checks for usage of the non-existent `=*`, `=!` and `=-`
22200operators."##,
22201        default_severity: Severity::Allow,
22202        warn_since: None,
22203        deny_since: None,
22204    },
22205    Lint {
22206        label: "clippy::suspicious_command_arg_space",
22207        description: r##"Checks for `Command::arg()` invocations that look like they
22208should be multiple arguments instead, such as `arg(-t ext2)`."##,
22209        default_severity: Severity::Allow,
22210        warn_since: None,
22211        deny_since: None,
22212    },
22213    Lint {
22214        label: "clippy::suspicious_doc_comments",
22215        description: r##"Detects the use of outer doc comments (`///`, `/**`) followed by a bang (`!`): `///!`"##,
22216        default_severity: Severity::Allow,
22217        warn_since: None,
22218        deny_since: None,
22219    },
22220    Lint {
22221        label: "clippy::suspicious_else_formatting",
22222        description: r##"Checks for formatting of `else`. It lints if the `else`
22223is followed immediately by a newline or the `else` seems to be missing."##,
22224        default_severity: Severity::Allow,
22225        warn_since: None,
22226        deny_since: None,
22227    },
22228    Lint {
22229        label: "clippy::suspicious_map",
22230        description: r##"Checks for calls to `map` followed by a `count`."##,
22231        default_severity: Severity::Allow,
22232        warn_since: None,
22233        deny_since: None,
22234    },
22235    Lint {
22236        label: "clippy::suspicious_op_assign_impl",
22237        description: r##"Lints for suspicious operations in impls of OpAssign, e.g.
22238subtracting elements in an AddAssign impl."##,
22239        default_severity: Severity::Allow,
22240        warn_since: None,
22241        deny_since: None,
22242    },
22243    Lint {
22244        label: "clippy::suspicious_open_options",
22245        description: r##"Checks for the suspicious use of `OpenOptions::create()`
22246without an explicit `OpenOptions::truncate()`."##,
22247        default_severity: Severity::Allow,
22248        warn_since: None,
22249        deny_since: None,
22250    },
22251    Lint {
22252        label: "clippy::suspicious_operation_groupings",
22253        description: r##"Checks for unlikely usages of binary operators that are almost
22254certainly typos and/or copy/paste errors, given the other usages
22255of binary operators nearby."##,
22256        default_severity: Severity::Allow,
22257        warn_since: None,
22258        deny_since: None,
22259    },
22260    Lint {
22261        label: "clippy::suspicious_splitn",
22262        description: r##"Checks for calls to [`splitn`]
22263(https://doc.rust-lang.org/std/primitive.str.html#method.splitn) and
22264related functions with either zero or one splits."##,
22265        default_severity: Severity::Allow,
22266        warn_since: None,
22267        deny_since: None,
22268    },
22269    Lint {
22270        label: "clippy::suspicious_to_owned",
22271        description: r##"Checks for the usage of `_.to_owned()`, on a `Cow<'_, _>`."##,
22272        default_severity: Severity::Allow,
22273        warn_since: None,
22274        deny_since: None,
22275    },
22276    Lint {
22277        label: "clippy::suspicious_unary_op_formatting",
22278        description: r##"Checks the formatting of a unary operator on the right hand side
22279of a binary operator. It lints if there is no space between the binary and unary operators,
22280but there is a space between the unary and its operand."##,
22281        default_severity: Severity::Allow,
22282        warn_since: None,
22283        deny_since: None,
22284    },
22285    Lint {
22286        label: "clippy::suspicious_xor_used_as_pow",
22287        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."##,
22288        default_severity: Severity::Allow,
22289        warn_since: None,
22290        deny_since: None,
22291    },
22292    Lint {
22293        label: "clippy::swap_ptr_to_ref",
22294        description: r##"Checks for calls to `core::mem::swap` where either parameter is derived from a pointer"##,
22295        default_severity: Severity::Allow,
22296        warn_since: None,
22297        deny_since: None,
22298    },
22299    Lint {
22300        label: "clippy::tabs_in_doc_comments",
22301        description: r##"Checks doc comments for usage of tab characters."##,
22302        default_severity: Severity::Allow,
22303        warn_since: None,
22304        deny_since: None,
22305    },
22306    Lint {
22307        label: "clippy::temporary_assignment",
22308        description: r##"Checks for construction of a structure or tuple just to
22309assign a value in it."##,
22310        default_severity: Severity::Allow,
22311        warn_since: None,
22312        deny_since: None,
22313    },
22314    Lint {
22315        label: "clippy::test_attr_in_doctest",
22316        description: r##"Checks for `#[test]` in doctests unless they are marked with
22317either `ignore`, `no_run` or `compile_fail`."##,
22318        default_severity: Severity::Allow,
22319        warn_since: None,
22320        deny_since: None,
22321    },
22322    Lint {
22323        label: "clippy::tests_outside_test_module",
22324        description: r##"Triggers when a testing function (marked with the `#[test]` attribute) isn't inside a testing module
22325(marked with `#[cfg(test)]`)."##,
22326        default_severity: Severity::Allow,
22327        warn_since: None,
22328        deny_since: None,
22329    },
22330    Lint {
22331        label: "clippy::to_digit_is_some",
22332        description: r##"Checks for `.to_digit(..).is_some()` on `char`s."##,
22333        default_severity: Severity::Allow,
22334        warn_since: None,
22335        deny_since: None,
22336    },
22337    Lint {
22338        label: "clippy::to_string_in_format_args",
22339        description: r##"Checks for [`ToString::to_string`](https://doc.rust-lang.org/std/string/trait.ToString.html#tymethod.to_string)
22340applied to a type that implements [`Display`](https://doc.rust-lang.org/std/fmt/trait.Display.html)
22341in a macro that does formatting."##,
22342        default_severity: Severity::Allow,
22343        warn_since: None,
22344        deny_since: None,
22345    },
22346    Lint {
22347        label: "clippy::to_string_trait_impl",
22348        description: r##"Checks for direct implementations of `ToString`."##,
22349        default_severity: Severity::Allow,
22350        warn_since: None,
22351        deny_since: None,
22352    },
22353    Lint {
22354        label: "clippy::todo",
22355        description: r##"Checks for usage of `todo!`."##,
22356        default_severity: Severity::Allow,
22357        warn_since: None,
22358        deny_since: None,
22359    },
22360    Lint {
22361        label: "clippy::too_long_first_doc_paragraph",
22362        description: r##"Checks if the first line in the documentation of items listed in module page is too long."##,
22363        default_severity: Severity::Allow,
22364        warn_since: None,
22365        deny_since: None,
22366    },
22367    Lint {
22368        label: "clippy::too_many_arguments",
22369        description: r##"Checks for functions with too many parameters."##,
22370        default_severity: Severity::Allow,
22371        warn_since: None,
22372        deny_since: None,
22373    },
22374    Lint {
22375        label: "clippy::too_many_lines",
22376        description: r##"Checks for functions with a large amount of lines."##,
22377        default_severity: Severity::Allow,
22378        warn_since: None,
22379        deny_since: None,
22380    },
22381    Lint {
22382        label: "clippy::toplevel_ref_arg",
22383        description: r##"Checks for function arguments and let bindings denoted as
22384`ref`."##,
22385        default_severity: Severity::Allow,
22386        warn_since: None,
22387        deny_since: None,
22388    },
22389    Lint {
22390        label: "clippy::trailing_empty_array",
22391        description: r##"Displays a warning when a struct with a trailing zero-sized array is declared without a `repr` attribute."##,
22392        default_severity: Severity::Allow,
22393        warn_since: None,
22394        deny_since: None,
22395    },
22396    Lint {
22397        label: "clippy::trait_duplication_in_bounds",
22398        description: r##"Checks for cases where generics or trait objects are being used and multiple
22399syntax specifications for trait bounds are used simultaneously."##,
22400        default_severity: Severity::Allow,
22401        warn_since: None,
22402        deny_since: None,
22403    },
22404    Lint {
22405        label: "clippy::transmute_bytes_to_str",
22406        description: r##"Checks for transmutes from a `&[u8]` to a `&str`."##,
22407        default_severity: Severity::Allow,
22408        warn_since: None,
22409        deny_since: None,
22410    },
22411    Lint {
22412        label: "clippy::transmute_float_to_int",
22413        description: r##"Checks for transmutes from a float to an integer."##,
22414        default_severity: Severity::Allow,
22415        warn_since: None,
22416        deny_since: None,
22417    },
22418    Lint {
22419        label: "clippy::transmute_int_to_bool",
22420        description: r##"Checks for transmutes from an integer to a `bool`."##,
22421        default_severity: Severity::Allow,
22422        warn_since: None,
22423        deny_since: None,
22424    },
22425    Lint {
22426        label: "clippy::transmute_int_to_char",
22427        description: r##"Checks for transmutes from an integer to a `char`."##,
22428        default_severity: Severity::Allow,
22429        warn_since: None,
22430        deny_since: None,
22431    },
22432    Lint {
22433        label: "clippy::transmute_int_to_float",
22434        description: r##"Checks for transmutes from an integer to a float."##,
22435        default_severity: Severity::Allow,
22436        warn_since: None,
22437        deny_since: None,
22438    },
22439    Lint {
22440        label: "clippy::transmute_int_to_non_zero",
22441        description: r##"Checks for transmutes from `T` to `NonZero<T>`, and suggests the `new_unchecked`
22442method instead."##,
22443        default_severity: Severity::Allow,
22444        warn_since: None,
22445        deny_since: None,
22446    },
22447    Lint {
22448        label: "clippy::transmute_null_to_fn",
22449        description: r##"Checks for null function pointer creation through transmute."##,
22450        default_severity: Severity::Allow,
22451        warn_since: None,
22452        deny_since: None,
22453    },
22454    Lint {
22455        label: "clippy::transmute_num_to_bytes",
22456        description: r##"Checks for transmutes from a number to an array of `u8`"##,
22457        default_severity: Severity::Allow,
22458        warn_since: None,
22459        deny_since: None,
22460    },
22461    Lint {
22462        label: "clippy::transmute_ptr_to_ptr",
22463        description: r##"Checks for transmutes from a pointer to a pointer, or
22464from a reference to a reference."##,
22465        default_severity: Severity::Allow,
22466        warn_since: None,
22467        deny_since: None,
22468    },
22469    Lint {
22470        label: "clippy::transmute_ptr_to_ref",
22471        description: r##"Checks for transmutes from a pointer to a reference."##,
22472        default_severity: Severity::Allow,
22473        warn_since: None,
22474        deny_since: None,
22475    },
22476    Lint {
22477        label: "clippy::transmute_undefined_repr",
22478        description: r##"Checks for transmutes between types which do not have a representation defined relative to
22479each other."##,
22480        default_severity: Severity::Allow,
22481        warn_since: None,
22482        deny_since: None,
22483    },
22484    Lint {
22485        label: "clippy::transmutes_expressible_as_ptr_casts",
22486        description: r##"Checks for transmutes that could be a pointer cast."##,
22487        default_severity: Severity::Allow,
22488        warn_since: None,
22489        deny_since: None,
22490    },
22491    Lint {
22492        label: "clippy::transmuting_null",
22493        description: r##"Checks for transmute calls which would receive a null pointer."##,
22494        default_severity: Severity::Allow,
22495        warn_since: None,
22496        deny_since: None,
22497    },
22498    Lint {
22499        label: "clippy::trim_split_whitespace",
22500        description: r##"Warns about calling `str::trim` (or variants) before `str::split_whitespace`."##,
22501        default_severity: Severity::Allow,
22502        warn_since: None,
22503        deny_since: None,
22504    },
22505    Lint {
22506        label: "clippy::trivial_regex",
22507        description: r##"Checks for trivial [regex](https://crates.io/crates/regex)
22508creation (with `Regex::new`, `RegexBuilder::new`, or `RegexSet::new`)."##,
22509        default_severity: Severity::Allow,
22510        warn_since: None,
22511        deny_since: None,
22512    },
22513    Lint {
22514        label: "clippy::trivially_copy_pass_by_ref",
22515        description: r##"Checks for functions taking arguments by reference, where
22516the argument type is `Copy` and small enough to be more efficient to always
22517pass by value."##,
22518        default_severity: Severity::Allow,
22519        warn_since: None,
22520        deny_since: None,
22521    },
22522    Lint {
22523        label: "clippy::try_err",
22524        description: r##"Checks for usage of `Err(x)?`."##,
22525        default_severity: Severity::Allow,
22526        warn_since: None,
22527        deny_since: None,
22528    },
22529    Lint {
22530        label: "clippy::tuple_array_conversions",
22531        description: r##"Checks for tuple<=>array conversions that are not done with `.into()`."##,
22532        default_severity: Severity::Allow,
22533        warn_since: None,
22534        deny_since: None,
22535    },
22536    Lint {
22537        label: "clippy::type_complexity",
22538        description: r##"Checks for types used in structs, parameters and `let`
22539declarations above a certain complexity threshold."##,
22540        default_severity: Severity::Allow,
22541        warn_since: None,
22542        deny_since: None,
22543    },
22544    Lint {
22545        label: "clippy::type_id_on_box",
22546        description: r##"Looks for calls to `.type_id()` on a `Box<dyn _>`."##,
22547        default_severity: Severity::Allow,
22548        warn_since: None,
22549        deny_since: None,
22550    },
22551    Lint {
22552        label: "clippy::type_repetition_in_bounds",
22553        description: r##"This lint warns about unnecessary type repetitions in trait bounds"##,
22554        default_severity: Severity::Allow,
22555        warn_since: None,
22556        deny_since: None,
22557    },
22558    Lint {
22559        label: "clippy::unchecked_duration_subtraction",
22560        description: r##"Lints subtraction between an `Instant` and a `Duration`."##,
22561        default_severity: Severity::Allow,
22562        warn_since: None,
22563        deny_since: None,
22564    },
22565    Lint {
22566        label: "clippy::unconditional_recursion",
22567        description: r##"Checks that there isn't an infinite recursion in trait
22568implementations."##,
22569        default_severity: Severity::Allow,
22570        warn_since: None,
22571        deny_since: None,
22572    },
22573    Lint {
22574        label: "clippy::undocumented_unsafe_blocks",
22575        description: r##"Checks for `unsafe` blocks and impls without a `// SAFETY: ` comment
22576explaining why the unsafe operations performed inside
22577the block are safe.
22578
22579Note the comment must appear on the line(s) preceding the unsafe block
22580with nothing appearing in between. The following is ok:
22581```rust
22582foo(
22583    // SAFETY:
22584    // This is a valid safety comment
22585    unsafe { *x }
22586)
22587```
22588But neither of these are:
22589```rust
22590// SAFETY:
22591// This is not a valid safety comment
22592foo(
22593    /* SAFETY: Neither is this */ unsafe { *x },
22594);
22595```"##,
22596        default_severity: Severity::Allow,
22597        warn_since: None,
22598        deny_since: None,
22599    },
22600    Lint {
22601        label: "clippy::unicode_not_nfc",
22602        description: r##"Checks for string literals that contain Unicode in a form
22603that is not equal to its
22604[NFC-recomposition](http://www.unicode.org/reports/tr15/#Norm_Forms)."##,
22605        default_severity: Severity::Allow,
22606        warn_since: None,
22607        deny_since: None,
22608    },
22609    Lint {
22610        label: "clippy::unimplemented",
22611        description: r##"Checks for usage of `unimplemented!`."##,
22612        default_severity: Severity::Allow,
22613        warn_since: None,
22614        deny_since: None,
22615    },
22616    Lint {
22617        label: "clippy::uninhabited_references",
22618        description: r##"It detects references to uninhabited types, such as `!` and
22619warns when those are either dereferenced or returned from a function."##,
22620        default_severity: Severity::Allow,
22621        warn_since: None,
22622        deny_since: None,
22623    },
22624    Lint {
22625        label: "clippy::uninit_assumed_init",
22626        description: r##"Checks for `MaybeUninit::uninit().assume_init()`."##,
22627        default_severity: Severity::Allow,
22628        warn_since: None,
22629        deny_since: None,
22630    },
22631    Lint {
22632        label: "clippy::uninit_vec",
22633        description: r##"Checks for `set_len()` call that creates `Vec` with uninitialized elements.
22634This is commonly caused by calling `set_len()` right after allocating or
22635reserving a buffer with `new()`, `default()`, `with_capacity()`, or `reserve()`."##,
22636        default_severity: Severity::Allow,
22637        warn_since: None,
22638        deny_since: None,
22639    },
22640    Lint {
22641        label: "clippy::uninlined_format_args",
22642        description: r##"Detect when a variable is not inlined in a format string,
22643and suggests to inline it."##,
22644        default_severity: Severity::Allow,
22645        warn_since: None,
22646        deny_since: None,
22647    },
22648    Lint {
22649        label: "clippy::unit_arg",
22650        description: r##"Checks for passing a unit value as an argument to a function without using a
22651unit literal (`()`)."##,
22652        default_severity: Severity::Allow,
22653        warn_since: None,
22654        deny_since: None,
22655    },
22656    Lint {
22657        label: "clippy::unit_cmp",
22658        description: r##"Checks for comparisons to unit. This includes all binary
22659comparisons (like `==` and `<`) and asserts."##,
22660        default_severity: Severity::Allow,
22661        warn_since: None,
22662        deny_since: None,
22663    },
22664    Lint {
22665        label: "clippy::unit_hash",
22666        description: r##"Detects `().hash(_)`."##,
22667        default_severity: Severity::Allow,
22668        warn_since: None,
22669        deny_since: None,
22670    },
22671    Lint {
22672        label: "clippy::unit_return_expecting_ord",
22673        description: r##"Checks for functions that expect closures of type
22674Fn(...) -> Ord where the implemented closure returns the unit type.
22675The lint also suggests to remove the semi-colon at the end of the statement if present."##,
22676        default_severity: Severity::Allow,
22677        warn_since: None,
22678        deny_since: None,
22679    },
22680    Lint {
22681        label: "clippy::unnecessary_box_returns",
22682        description: r##"Checks for a return type containing a `Box<T>` where `T` implements `Sized`
22683
22684The lint ignores `Box<T>` where `T` is larger than `unnecessary_box_size`,
22685as returning a large `T` directly may be detrimental to performance."##,
22686        default_severity: Severity::Allow,
22687        warn_since: None,
22688        deny_since: None,
22689    },
22690    Lint {
22691        label: "clippy::unnecessary_cast",
22692        description: r##"Checks for casts to the same type, casts of int literals to integer
22693types, casts of float literals to float types, and casts between raw
22694pointers that don't change type or constness."##,
22695        default_severity: Severity::Allow,
22696        warn_since: None,
22697        deny_since: None,
22698    },
22699    Lint {
22700        label: "clippy::unnecessary_clippy_cfg",
22701        description: r##"Checks for `#[cfg_attr(clippy, allow(clippy::lint))]`
22702and suggests to replace it with `#[allow(clippy::lint)]`."##,
22703        default_severity: Severity::Allow,
22704        warn_since: None,
22705        deny_since: None,
22706    },
22707    Lint {
22708        label: "clippy::unnecessary_fallible_conversions",
22709        description: r##"Checks for calls to `TryInto::try_into` and `TryFrom::try_from` when their infallible counterparts
22710could be used."##,
22711        default_severity: Severity::Allow,
22712        warn_since: None,
22713        deny_since: None,
22714    },
22715    Lint {
22716        label: "clippy::unnecessary_filter_map",
22717        description: r##"Checks for `filter_map` calls that could be replaced by `filter` or `map`.
22718More specifically it checks if the closure provided is only performing one of the
22719filter or map operations and suggests the appropriate option."##,
22720        default_severity: Severity::Allow,
22721        warn_since: None,
22722        deny_since: None,
22723    },
22724    Lint {
22725        label: "clippy::unnecessary_find_map",
22726        description: r##"Checks for `find_map` calls that could be replaced by `find` or `map`. More
22727specifically it checks if the closure provided is only performing one of the
22728find or map operations and suggests the appropriate option."##,
22729        default_severity: Severity::Allow,
22730        warn_since: None,
22731        deny_since: None,
22732    },
22733    Lint {
22734        label: "clippy::unnecessary_first_then_check",
22735        description: r##"Checks the usage of `.first().is_some()` or `.first().is_none()` to check if a slice is
22736empty."##,
22737        default_severity: Severity::Allow,
22738        warn_since: None,
22739        deny_since: None,
22740    },
22741    Lint {
22742        label: "clippy::unnecessary_fold",
22743        description: r##"Checks for usage of `fold` when a more succinct alternative exists.
22744Specifically, this checks for `fold`s which could be replaced by `any`, `all`,
22745`sum` or `product`."##,
22746        default_severity: Severity::Allow,
22747        warn_since: None,
22748        deny_since: None,
22749    },
22750    Lint {
22751        label: "clippy::unnecessary_get_then_check",
22752        description: r##"Checks the usage of `.get().is_some()` or `.get().is_none()` on std map types."##,
22753        default_severity: Severity::Allow,
22754        warn_since: None,
22755        deny_since: None,
22756    },
22757    Lint {
22758        label: "clippy::unnecessary_join",
22759        description: r##"Checks for usage of `.collect::<Vec<String>>().join()` on iterators."##,
22760        default_severity: Severity::Allow,
22761        warn_since: None,
22762        deny_since: None,
22763    },
22764    Lint {
22765        label: "clippy::unnecessary_lazy_evaluations",
22766        description: r##"As the counterpart to `or_fun_call`, this lint looks for unnecessary
22767lazily evaluated closures on `Option` and `Result`.
22768
22769This lint suggests changing the following functions, when eager evaluation results in
22770simpler code:
22771 - `unwrap_or_else` to `unwrap_or`
22772 - `and_then` to `and`
22773 - `or_else` to `or`
22774 - `get_or_insert_with` to `get_or_insert`
22775 - `ok_or_else` to `ok_or`
22776 - `then` to `then_some` (for msrv >= 1.62.0)"##,
22777        default_severity: Severity::Allow,
22778        warn_since: None,
22779        deny_since: None,
22780    },
22781    Lint {
22782        label: "clippy::unnecessary_literal_unwrap",
22783        description: r##"Checks for `.unwrap()` related calls on `Result`s and `Option`s that are constructed."##,
22784        default_severity: Severity::Allow,
22785        warn_since: None,
22786        deny_since: None,
22787    },
22788    Lint {
22789        label: "clippy::unnecessary_map_on_constructor",
22790        description: r##"Suggests removing the use of a `map()` (or `map_err()`) method when an `Option` or `Result`
22791is being constructed."##,
22792        default_severity: Severity::Allow,
22793        warn_since: None,
22794        deny_since: None,
22795    },
22796    Lint {
22797        label: "clippy::unnecessary_min_or_max",
22798        description: r##"Checks for unnecessary calls to `min()` or `max()` in the following cases
22799- Either both side is constant
22800- One side is clearly larger than the other, like i32::MIN and an i32 variable"##,
22801        default_severity: Severity::Allow,
22802        warn_since: None,
22803        deny_since: None,
22804    },
22805    Lint {
22806        label: "clippy::unnecessary_mut_passed",
22807        description: r##"Detects passing a mutable reference to a function that only
22808requires an immutable reference."##,
22809        default_severity: Severity::Allow,
22810        warn_since: None,
22811        deny_since: None,
22812    },
22813    Lint {
22814        label: "clippy::unnecessary_operation",
22815        description: r##"Checks for expression statements that can be reduced to a
22816sub-expression."##,
22817        default_severity: Severity::Allow,
22818        warn_since: None,
22819        deny_since: None,
22820    },
22821    Lint {
22822        label: "clippy::unnecessary_owned_empty_strings",
22823        description: r##"Detects cases of owned empty strings being passed as an argument to a function expecting `&str`"##,
22824        default_severity: Severity::Allow,
22825        warn_since: None,
22826        deny_since: None,
22827    },
22828    Lint {
22829        label: "clippy::unnecessary_result_map_or_else",
22830        description: r##"Checks for usage of `.map_or_else()` map closure for `Result` type."##,
22831        default_severity: Severity::Allow,
22832        warn_since: None,
22833        deny_since: None,
22834    },
22835    Lint {
22836        label: "clippy::unnecessary_safety_comment",
22837        description: r##"Checks for `// SAFETY: ` comments on safe code."##,
22838        default_severity: Severity::Allow,
22839        warn_since: None,
22840        deny_since: None,
22841    },
22842    Lint {
22843        label: "clippy::unnecessary_safety_doc",
22844        description: r##"Checks for the doc comments of publicly visible
22845safe functions and traits and warns if there is a `# Safety` section."##,
22846        default_severity: Severity::Allow,
22847        warn_since: None,
22848        deny_since: None,
22849    },
22850    Lint {
22851        label: "clippy::unnecessary_self_imports",
22852        description: r##"Checks for imports ending in `::{self}`."##,
22853        default_severity: Severity::Allow,
22854        warn_since: None,
22855        deny_since: None,
22856    },
22857    Lint {
22858        label: "clippy::unnecessary_sort_by",
22859        description: r##"Checks for usage of `Vec::sort_by` passing in a closure
22860which compares the two arguments, either directly or indirectly."##,
22861        default_severity: Severity::Allow,
22862        warn_since: None,
22863        deny_since: None,
22864    },
22865    Lint {
22866        label: "clippy::unnecessary_struct_initialization",
22867        description: r##"Checks for initialization of an identical `struct` from another instance
22868of the type, either by copying a base without setting any field or by
22869moving all fields individually."##,
22870        default_severity: Severity::Allow,
22871        warn_since: None,
22872        deny_since: None,
22873    },
22874    Lint {
22875        label: "clippy::unnecessary_to_owned",
22876        description: r##"Checks for unnecessary calls to [`ToOwned::to_owned`](https://doc.rust-lang.org/std/borrow/trait.ToOwned.html#tymethod.to_owned)
22877and other `to_owned`-like functions."##,
22878        default_severity: Severity::Allow,
22879        warn_since: None,
22880        deny_since: None,
22881    },
22882    Lint {
22883        label: "clippy::unnecessary_unwrap",
22884        description: r##"Checks for calls of `unwrap[_err]()` that cannot fail."##,
22885        default_severity: Severity::Allow,
22886        warn_since: None,
22887        deny_since: None,
22888    },
22889    Lint {
22890        label: "clippy::unnecessary_wraps",
22891        description: r##"Checks for private functions that only return `Ok` or `Some`."##,
22892        default_severity: Severity::Allow,
22893        warn_since: None,
22894        deny_since: None,
22895    },
22896    Lint {
22897        label: "clippy::unneeded_field_pattern",
22898        description: r##"Checks for structure field patterns bound to wildcards."##,
22899        default_severity: Severity::Allow,
22900        warn_since: None,
22901        deny_since: None,
22902    },
22903    Lint {
22904        label: "clippy::unneeded_wildcard_pattern",
22905        description: r##"Checks for tuple patterns with a wildcard
22906pattern (`_`) is next to a rest pattern (`..`).
22907
22908_NOTE_: While `_, ..` means there is at least one element left, `..`
22909means there are 0 or more elements left. This can make a difference
22910when refactoring, but shouldn't result in errors in the refactored code,
22911since the wildcard pattern isn't used anyway."##,
22912        default_severity: Severity::Allow,
22913        warn_since: None,
22914        deny_since: None,
22915    },
22916    Lint {
22917        label: "clippy::unnested_or_patterns",
22918        description: r##"Checks for unnested or-patterns, e.g., `Some(0) | Some(2)` and
22919suggests replacing the pattern with a nested one, `Some(0 | 2)`.
22920
22921Another way to think of this is that it rewrites patterns in
22922*disjunctive normal form (DNF)* into *conjunctive normal form (CNF)*."##,
22923        default_severity: Severity::Allow,
22924        warn_since: None,
22925        deny_since: None,
22926    },
22927    Lint {
22928        label: "clippy::unreachable",
22929        description: r##"Checks for usage of `unreachable!`."##,
22930        default_severity: Severity::Allow,
22931        warn_since: None,
22932        deny_since: None,
22933    },
22934    Lint {
22935        label: "clippy::unreadable_literal",
22936        description: r##"Warns if a long integral or floating-point constant does
22937not contain underscores."##,
22938        default_severity: Severity::Allow,
22939        warn_since: None,
22940        deny_since: None,
22941    },
22942    Lint {
22943        label: "clippy::unsafe_derive_deserialize",
22944        description: r##"Checks for deriving `serde::Deserialize` on a type that
22945has methods using `unsafe`."##,
22946        default_severity: Severity::Allow,
22947        warn_since: None,
22948        deny_since: None,
22949    },
22950    Lint {
22951        label: "clippy::unsafe_removed_from_name",
22952        description: r##"Checks for imports that remove unsafe from an item's
22953name."##,
22954        default_severity: Severity::Allow,
22955        warn_since: None,
22956        deny_since: None,
22957    },
22958    Lint {
22959        label: "clippy::unsafe_vector_initialization",
22960        description: r##"Nothing. This lint has been deprecated"##,
22961        default_severity: Severity::Allow,
22962        warn_since: None,
22963        deny_since: None,
22964    },
22965    Lint {
22966        label: "clippy::unseparated_literal_suffix",
22967        description: r##"Warns if literal suffixes are not separated by an
22968underscore.
22969To enforce unseparated literal suffix style,
22970see the `separated_literal_suffix` lint."##,
22971        default_severity: Severity::Allow,
22972        warn_since: None,
22973        deny_since: None,
22974    },
22975    Lint {
22976        label: "clippy::unsound_collection_transmute",
22977        description: r##"Checks for transmutes between collections whose
22978types have different ABI, size or alignment."##,
22979        default_severity: Severity::Allow,
22980        warn_since: None,
22981        deny_since: None,
22982    },
22983    Lint {
22984        label: "clippy::unstable_as_mut_slice",
22985        description: r##"Nothing. This lint has been deprecated"##,
22986        default_severity: Severity::Allow,
22987        warn_since: None,
22988        deny_since: None,
22989    },
22990    Lint {
22991        label: "clippy::unstable_as_slice",
22992        description: r##"Nothing. This lint has been deprecated"##,
22993        default_severity: Severity::Allow,
22994        warn_since: None,
22995        deny_since: None,
22996    },
22997    Lint {
22998        label: "clippy::unused_async",
22999        description: r##"Checks for functions that are declared `async` but have no `.await`s inside of them."##,
23000        default_severity: Severity::Allow,
23001        warn_since: None,
23002        deny_since: None,
23003    },
23004    Lint {
23005        label: "clippy::unused_collect",
23006        description: r##"Nothing. This lint has been deprecated"##,
23007        default_severity: Severity::Allow,
23008        warn_since: None,
23009        deny_since: None,
23010    },
23011    Lint {
23012        label: "clippy::unused_enumerate_index",
23013        description: r##"Checks for uses of the `enumerate` method where the index is unused (`_`)"##,
23014        default_severity: Severity::Allow,
23015        warn_since: None,
23016        deny_since: None,
23017    },
23018    Lint {
23019        label: "clippy::unused_format_specs",
23020        description: r##"Detects [formatting parameters] that have no effect on the output of
23021`format!()`, `println!()` or similar macros."##,
23022        default_severity: Severity::Allow,
23023        warn_since: None,
23024        deny_since: None,
23025    },
23026    Lint {
23027        label: "clippy::unused_io_amount",
23028        description: r##"Checks for unused written/read amount."##,
23029        default_severity: Severity::Allow,
23030        warn_since: None,
23031        deny_since: None,
23032    },
23033    Lint {
23034        label: "clippy::unused_peekable",
23035        description: r##"Checks for the creation of a `peekable` iterator that is never `.peek()`ed"##,
23036        default_severity: Severity::Allow,
23037        warn_since: None,
23038        deny_since: None,
23039    },
23040    Lint {
23041        label: "clippy::unused_result_ok",
23042        description: r##"Checks for calls to `Result::ok()` without using the returned `Option`."##,
23043        default_severity: Severity::Allow,
23044        warn_since: None,
23045        deny_since: None,
23046    },
23047    Lint {
23048        label: "clippy::unused_rounding",
23049        description: r##"Detects cases where a whole-number literal float is being rounded, using
23050the `floor`, `ceil`, or `round` methods."##,
23051        default_severity: Severity::Allow,
23052        warn_since: None,
23053        deny_since: None,
23054    },
23055    Lint {
23056        label: "clippy::unused_self",
23057        description: r##"Checks methods that contain a `self` argument but don't use it"##,
23058        default_severity: Severity::Allow,
23059        warn_since: None,
23060        deny_since: None,
23061    },
23062    Lint {
23063        label: "clippy::unused_trait_names",
23064        description: r##"Checks for `use Trait` where the Trait is only used for its methods and not referenced by a path directly."##,
23065        default_severity: Severity::Allow,
23066        warn_since: None,
23067        deny_since: None,
23068    },
23069    Lint {
23070        label: "clippy::unused_unit",
23071        description: r##"Checks for unit (`()`) expressions that can be removed."##,
23072        default_severity: Severity::Allow,
23073        warn_since: None,
23074        deny_since: None,
23075    },
23076    Lint {
23077        label: "clippy::unusual_byte_groupings",
23078        description: r##"Warns if hexadecimal or binary literals are not grouped
23079by nibble or byte."##,
23080        default_severity: Severity::Allow,
23081        warn_since: None,
23082        deny_since: None,
23083    },
23084    Lint {
23085        label: "clippy::unwrap_in_result",
23086        description: r##"Checks for functions of type `Result` that contain `expect()` or `unwrap()`"##,
23087        default_severity: Severity::Allow,
23088        warn_since: None,
23089        deny_since: None,
23090    },
23091    Lint {
23092        label: "clippy::unwrap_or_default",
23093        description: r##"Checks for usages of the following functions with an argument that constructs a default value
23094(e.g., `Default::default` or `String::new`):
23095- `unwrap_or`
23096- `unwrap_or_else`
23097- `or_insert`
23098- `or_insert_with`"##,
23099        default_severity: Severity::Allow,
23100        warn_since: None,
23101        deny_since: None,
23102    },
23103    Lint {
23104        label: "clippy::unwrap_used",
23105        description: r##"Checks for `.unwrap()` or `.unwrap_err()` calls on `Result`s and `.unwrap()` call on `Option`s."##,
23106        default_severity: Severity::Allow,
23107        warn_since: None,
23108        deny_since: None,
23109    },
23110    Lint {
23111        label: "clippy::upper_case_acronyms",
23112        description: r##"Checks for fully capitalized names and optionally names containing a capitalized acronym."##,
23113        default_severity: Severity::Allow,
23114        warn_since: None,
23115        deny_since: None,
23116    },
23117    Lint {
23118        label: "clippy::use_debug",
23119        description: r##"Checks for usage of `Debug` formatting. The purpose of this
23120lint is to catch debugging remnants."##,
23121        default_severity: Severity::Allow,
23122        warn_since: None,
23123        deny_since: None,
23124    },
23125    Lint {
23126        label: "clippy::use_self",
23127        description: r##"Checks for unnecessary repetition of structure name when a
23128replacement with `Self` is applicable."##,
23129        default_severity: Severity::Allow,
23130        warn_since: None,
23131        deny_since: None,
23132    },
23133    Lint {
23134        label: "clippy::used_underscore_binding",
23135        description: r##"Checks for the use of bindings with a single leading
23136underscore."##,
23137        default_severity: Severity::Allow,
23138        warn_since: None,
23139        deny_since: None,
23140    },
23141    Lint {
23142        label: "clippy::used_underscore_items",
23143        description: r##"Checks for the use of item with a single leading
23144underscore."##,
23145        default_severity: Severity::Allow,
23146        warn_since: None,
23147        deny_since: None,
23148    },
23149    Lint {
23150        label: "clippy::useless_asref",
23151        description: r##"Checks for usage of `.as_ref()` or `.as_mut()` where the
23152types before and after the call are the same."##,
23153        default_severity: Severity::Allow,
23154        warn_since: None,
23155        deny_since: None,
23156    },
23157    Lint {
23158        label: "clippy::useless_attribute",
23159        description: r##"Checks for `extern crate` and `use` items annotated with
23160lint attributes.
23161
23162This lint permits lint attributes for lints emitted on the items themself.
23163For `use` items these lints are:
23164* ambiguous_glob_reexports
23165* dead_code
23166* deprecated
23167* hidden_glob_reexports
23168* unreachable_pub
23169* unused
23170* unused_braces
23171* unused_import_braces
23172* clippy::disallowed_types
23173* clippy::enum_glob_use
23174* clippy::macro_use_imports
23175* clippy::module_name_repetitions
23176* clippy::redundant_pub_crate
23177* clippy::single_component_path_imports
23178* clippy::unsafe_removed_from_name
23179* clippy::wildcard_imports
23180
23181For `extern crate` items these lints are:
23182* `unused_imports` on items with `#[macro_use]`"##,
23183        default_severity: Severity::Allow,
23184        warn_since: None,
23185        deny_since: None,
23186    },
23187    Lint {
23188        label: "clippy::useless_conversion",
23189        description: r##"Checks for `Into`, `TryInto`, `From`, `TryFrom`, or `IntoIter` calls
23190which uselessly convert to the same type."##,
23191        default_severity: Severity::Allow,
23192        warn_since: None,
23193        deny_since: None,
23194    },
23195    Lint {
23196        label: "clippy::useless_format",
23197        description: r##"Checks for the use of `format!(string literal with no
23198argument)` and `format!({}, foo)` where `foo` is a string."##,
23199        default_severity: Severity::Allow,
23200        warn_since: None,
23201        deny_since: None,
23202    },
23203    Lint {
23204        label: "clippy::useless_let_if_seq",
23205        description: r##"Checks for variable declarations immediately followed by a
23206conditional affectation."##,
23207        default_severity: Severity::Allow,
23208        warn_since: None,
23209        deny_since: None,
23210    },
23211    Lint {
23212        label: "clippy::useless_transmute",
23213        description: r##"Checks for transmutes to the original type of the object
23214and transmutes that could be a cast."##,
23215        default_severity: Severity::Allow,
23216        warn_since: None,
23217        deny_since: None,
23218    },
23219    Lint {
23220        label: "clippy::useless_vec",
23221        description: r##"Checks for usage of `vec![..]` when using `[..]` would
23222be possible."##,
23223        default_severity: Severity::Allow,
23224        warn_since: None,
23225        deny_since: None,
23226    },
23227    Lint {
23228        label: "clippy::vec_box",
23229        description: r##"Checks for usage of `Vec<Box<T>>` where T: Sized anywhere in the code.
23230Check the [Box documentation](https://doc.rust-lang.org/std/boxed/index.html) for more information."##,
23231        default_severity: Severity::Allow,
23232        warn_since: None,
23233        deny_since: None,
23234    },
23235    Lint {
23236        label: "clippy::vec_init_then_push",
23237        description: r##"Checks for calls to `push` immediately after creating a new `Vec`.
23238
23239If the `Vec` is created using `with_capacity` this will only lint if the capacity is a
23240constant and the number of pushes is greater than or equal to the initial capacity.
23241
23242If the `Vec` is extended after the initial sequence of pushes and it was default initialized
23243then this will only lint after there were at least four pushes. This number may change in
23244the future."##,
23245        default_severity: Severity::Allow,
23246        warn_since: None,
23247        deny_since: None,
23248    },
23249    Lint {
23250        label: "clippy::vec_resize_to_zero",
23251        description: r##"Finds occurrences of `Vec::resize(0, an_int)`"##,
23252        default_severity: Severity::Allow,
23253        warn_since: None,
23254        deny_since: None,
23255    },
23256    Lint {
23257        label: "clippy::verbose_bit_mask",
23258        description: r##"Checks for bit masks that can be replaced by a call
23259to `trailing_zeros`"##,
23260        default_severity: Severity::Allow,
23261        warn_since: None,
23262        deny_since: None,
23263    },
23264    Lint {
23265        label: "clippy::verbose_file_reads",
23266        description: r##"Checks for usage of File::read_to_end and File::read_to_string."##,
23267        default_severity: Severity::Allow,
23268        warn_since: None,
23269        deny_since: None,
23270    },
23271    Lint {
23272        label: "clippy::waker_clone_wake",
23273        description: r##"Checks for usage of `waker.clone().wake()`"##,
23274        default_severity: Severity::Allow,
23275        warn_since: None,
23276        deny_since: None,
23277    },
23278    Lint {
23279        label: "clippy::while_float",
23280        description: r##"Checks for while loops comparing floating point values."##,
23281        default_severity: Severity::Allow,
23282        warn_since: None,
23283        deny_since: None,
23284    },
23285    Lint {
23286        label: "clippy::while_immutable_condition",
23287        description: r##"Checks whether variables used within while loop condition
23288can be (and are) mutated in the body."##,
23289        default_severity: Severity::Allow,
23290        warn_since: None,
23291        deny_since: None,
23292    },
23293    Lint {
23294        label: "clippy::while_let_loop",
23295        description: r##"Detects `loop + match` combinations that are easier
23296written as a `while let` loop."##,
23297        default_severity: Severity::Allow,
23298        warn_since: None,
23299        deny_since: None,
23300    },
23301    Lint {
23302        label: "clippy::while_let_on_iterator",
23303        description: r##"Checks for `while let` expressions on iterators."##,
23304        default_severity: Severity::Allow,
23305        warn_since: None,
23306        deny_since: None,
23307    },
23308    Lint {
23309        label: "clippy::wildcard_dependencies",
23310        description: r##"Checks for wildcard dependencies in the `Cargo.toml`."##,
23311        default_severity: Severity::Allow,
23312        warn_since: None,
23313        deny_since: None,
23314    },
23315    Lint {
23316        label: "clippy::wildcard_enum_match_arm",
23317        description: r##"Checks for wildcard enum matches using `_`."##,
23318        default_severity: Severity::Allow,
23319        warn_since: None,
23320        deny_since: None,
23321    },
23322    Lint {
23323        label: "clippy::wildcard_imports",
23324        description: r##"Checks for wildcard imports `use _::*`."##,
23325        default_severity: Severity::Allow,
23326        warn_since: None,
23327        deny_since: None,
23328    },
23329    Lint {
23330        label: "clippy::wildcard_in_or_patterns",
23331        description: r##"Checks for wildcard pattern used with others patterns in same match arm."##,
23332        default_severity: Severity::Allow,
23333        warn_since: None,
23334        deny_since: None,
23335    },
23336    Lint {
23337        label: "clippy::write_literal",
23338        description: r##"This lint warns about the use of literals as `write!`/`writeln!` args."##,
23339        default_severity: Severity::Allow,
23340        warn_since: None,
23341        deny_since: None,
23342    },
23343    Lint {
23344        label: "clippy::write_with_newline",
23345        description: r##"This lint warns when you use `write!()` with a format
23346string that
23347ends in a newline."##,
23348        default_severity: Severity::Allow,
23349        warn_since: None,
23350        deny_since: None,
23351    },
23352    Lint {
23353        label: "clippy::writeln_empty_string",
23354        description: r##"This lint warns when you use `writeln!(buf, )` to
23355print a newline."##,
23356        default_severity: Severity::Allow,
23357        warn_since: None,
23358        deny_since: None,
23359    },
23360    Lint {
23361        label: "clippy::wrong_pub_self_convention",
23362        description: r##"Nothing. This lint has been deprecated"##,
23363        default_severity: Severity::Allow,
23364        warn_since: None,
23365        deny_since: None,
23366    },
23367    Lint {
23368        label: "clippy::wrong_self_convention",
23369        description: r##"Checks for methods with certain name prefixes or suffixes, and which
23370do not adhere to standard conventions regarding how `self` is taken.
23371The actual rules are:
23372
23373|Prefix |Postfix     |`self` taken                   | `self` type  |
23374|-------|------------|-------------------------------|--------------|
23375|`as_`  | none       |`&self` or `&mut self`         | any          |
23376|`from_`| none       | none                          | any          |
23377|`into_`| none       |`self`                         | any          |
23378|`is_`  | none       |`&mut self` or `&self` or none | any          |
23379|`to_`  | `_mut`     |`&mut self`                    | any          |
23380|`to_`  | not `_mut` |`self`                         | `Copy`       |
23381|`to_`  | not `_mut` |`&self`                        | not `Copy`   |
23382
23383Note: Clippy doesn't trigger methods with `to_` prefix in:
23384- Traits definition.
23385Clippy can not tell if a type that implements a trait is `Copy` or not.
23386- Traits implementation, when `&self` is taken.
23387The method signature is controlled by the trait and often `&self` is required for all types that implement the trait
23388(see e.g. the `std::string::ToString` trait).
23389
23390Clippy allows `Pin<&Self>` and `Pin<&mut Self>` if `&self` and `&mut self` is required.
23391
23392Please find more info here:
23393https://rust-lang.github.io/api-guidelines/naming.html#ad-hoc-conversions-follow-as_-to_-into_-conventions-c-conv"##,
23394        default_severity: Severity::Allow,
23395        warn_since: None,
23396        deny_since: None,
23397    },
23398    Lint {
23399        label: "clippy::wrong_transmute",
23400        description: r##"Checks for transmutes that can't ever be correct on any
23401architecture."##,
23402        default_severity: Severity::Allow,
23403        warn_since: None,
23404        deny_since: None,
23405    },
23406    Lint {
23407        label: "clippy::zero_divided_by_zero",
23408        description: r##"Checks for `0.0 / 0.0`."##,
23409        default_severity: Severity::Allow,
23410        warn_since: None,
23411        deny_since: None,
23412    },
23413    Lint {
23414        label: "clippy::zero_prefixed_literal",
23415        description: r##"Warns if an integral constant literal starts with `0`."##,
23416        default_severity: Severity::Allow,
23417        warn_since: None,
23418        deny_since: None,
23419    },
23420    Lint {
23421        label: "clippy::zero_ptr",
23422        description: r##"Catch casts from `0` to some pointer type"##,
23423        default_severity: Severity::Allow,
23424        warn_since: None,
23425        deny_since: None,
23426    },
23427    Lint {
23428        label: "clippy::zero_repeat_side_effects",
23429        description: r##"Checks for array or vec initializations which call a function or method,
23430but which have a repeat count of zero."##,
23431        default_severity: Severity::Allow,
23432        warn_since: None,
23433        deny_since: None,
23434    },
23435    Lint {
23436        label: "clippy::zero_sized_map_values",
23437        description: r##"Checks for maps with zero-sized value types anywhere in the code."##,
23438        default_severity: Severity::Allow,
23439        warn_since: None,
23440        deny_since: None,
23441    },
23442    Lint {
23443        label: "clippy::zombie_processes",
23444        description: r##"Looks for code that spawns a process but never calls `wait()` on the child."##,
23445        default_severity: Severity::Allow,
23446        warn_since: None,
23447        deny_since: None,
23448    },
23449    Lint {
23450        label: "clippy::zst_offset",
23451        description: r##"Checks for `offset(_)`, `wrapping_`{`add`, `sub`}, etc. on raw pointers to
23452zero-sized types"##,
23453        default_severity: Severity::Allow,
23454        warn_since: None,
23455        deny_since: None,
23456    },
23457];
23458pub const CLIPPY_LINT_GROUPS: &[LintGroup] = &[
23459    LintGroup {
23460        lint: Lint {
23461            label: "clippy::cargo",
23462            description: r##"lint group for: clippy::cargo_common_metadata, clippy::multiple_crate_versions, clippy::negative_feature_names, clippy::redundant_feature_names, clippy::wildcard_dependencies"##,
23463            default_severity: Severity::Allow,
23464            warn_since: None,
23465            deny_since: None,
23466        },
23467        children: &[
23468            "clippy::cargo_common_metadata",
23469            "clippy::multiple_crate_versions",
23470            "clippy::negative_feature_names",
23471            "clippy::redundant_feature_names",
23472            "clippy::wildcard_dependencies",
23473        ],
23474    },
23475    LintGroup {
23476        lint: Lint {
23477            label: "clippy::complexity",
23478            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"##,
23479            default_severity: Severity::Allow,
23480            warn_since: None,
23481            deny_since: None,
23482        },
23483        children: &[
23484            "clippy::bind_instead_of_map",
23485            "clippy::bool_comparison",
23486            "clippy::borrow_deref_ref",
23487            "clippy::borrowed_box",
23488            "clippy::bytes_count_to_len",
23489            "clippy::char_lit_as_u8",
23490            "clippy::clone_on_copy",
23491            "clippy::crosspointer_transmute",
23492            "clippy::default_constructed_unit_structs",
23493            "clippy::deprecated_cfg_attr",
23494            "clippy::deref_addrof",
23495            "clippy::derivable_impls",
23496            "clippy::diverging_sub_expression",
23497            "clippy::double_comparisons",
23498            "clippy::double_parens",
23499            "clippy::duration_subsec",
23500            "clippy::excessive_nesting",
23501            "clippy::explicit_auto_deref",
23502            "clippy::explicit_counter_loop",
23503            "clippy::explicit_write",
23504            "clippy::extra_unused_lifetimes",
23505            "clippy::extra_unused_type_parameters",
23506            "clippy::filter_map_identity",
23507            "clippy::filter_next",
23508            "clippy::flat_map_identity",
23509            "clippy::get_last_with_len",
23510            "clippy::identity_op",
23511            "clippy::implied_bounds_in_impls",
23512            "clippy::inspect_for_each",
23513            "clippy::int_plus_one",
23514            "clippy::iter_count",
23515            "clippy::iter_kv_map",
23516            "clippy::let_with_type_underscore",
23517            "clippy::manual_c_str_literals",
23518            "clippy::manual_clamp",
23519            "clippy::manual_div_ceil",
23520            "clippy::manual_filter",
23521            "clippy::manual_filter_map",
23522            "clippy::manual_find",
23523            "clippy::manual_find_map",
23524            "clippy::manual_flatten",
23525            "clippy::manual_hash_one",
23526            "clippy::manual_inspect",
23527            "clippy::manual_is_power_of_two",
23528            "clippy::manual_main_separator_str",
23529            "clippy::manual_range_patterns",
23530            "clippy::manual_rem_euclid",
23531            "clippy::manual_slice_size_calculation",
23532            "clippy::manual_split_once",
23533            "clippy::manual_strip",
23534            "clippy::manual_swap",
23535            "clippy::manual_unwrap_or",
23536            "clippy::map_flatten",
23537            "clippy::map_identity",
23538            "clippy::match_as_ref",
23539            "clippy::match_single_binding",
23540            "clippy::needless_arbitrary_self_type",
23541            "clippy::needless_bool",
23542            "clippy::needless_bool_assign",
23543            "clippy::needless_borrowed_reference",
23544            "clippy::needless_if",
23545            "clippy::needless_lifetimes",
23546            "clippy::needless_match",
23547            "clippy::needless_option_as_deref",
23548            "clippy::needless_option_take",
23549            "clippy::needless_question_mark",
23550            "clippy::needless_splitn",
23551            "clippy::needless_update",
23552            "clippy::neg_cmp_op_on_partial_ord",
23553            "clippy::no_effect",
23554            "clippy::nonminimal_bool",
23555            "clippy::only_used_in_recursion",
23556            "clippy::option_as_ref_deref",
23557            "clippy::option_filter_map",
23558            "clippy::option_map_unit_fn",
23559            "clippy::or_then_unwrap",
23560            "clippy::partialeq_ne_impl",
23561            "clippy::precedence",
23562            "clippy::ptr_offset_with_cast",
23563            "clippy::range_zip_with_len",
23564            "clippy::redundant_as_str",
23565            "clippy::redundant_async_block",
23566            "clippy::redundant_at_rest_pattern",
23567            "clippy::redundant_closure_call",
23568            "clippy::redundant_guards",
23569            "clippy::redundant_slicing",
23570            "clippy::repeat_once",
23571            "clippy::reserve_after_initialization",
23572            "clippy::result_filter_map",
23573            "clippy::result_map_unit_fn",
23574            "clippy::search_is_some",
23575            "clippy::seek_from_current",
23576            "clippy::seek_to_start_instead_of_rewind",
23577            "clippy::short_circuit_statement",
23578            "clippy::single_element_loop",
23579            "clippy::skip_while_next",
23580            "clippy::string_from_utf8_as_bytes",
23581            "clippy::strlen_on_c_strings",
23582            "clippy::temporary_assignment",
23583            "clippy::too_many_arguments",
23584            "clippy::transmute_bytes_to_str",
23585            "clippy::transmute_float_to_int",
23586            "clippy::transmute_int_to_bool",
23587            "clippy::transmute_int_to_char",
23588            "clippy::transmute_int_to_float",
23589            "clippy::transmute_int_to_non_zero",
23590            "clippy::transmute_num_to_bytes",
23591            "clippy::transmute_ptr_to_ref",
23592            "clippy::transmutes_expressible_as_ptr_casts",
23593            "clippy::type_complexity",
23594            "clippy::unit_arg",
23595            "clippy::unnecessary_cast",
23596            "clippy::unnecessary_filter_map",
23597            "clippy::unnecessary_find_map",
23598            "clippy::unnecessary_first_then_check",
23599            "clippy::unnecessary_literal_unwrap",
23600            "clippy::unnecessary_map_on_constructor",
23601            "clippy::unnecessary_min_or_max",
23602            "clippy::unnecessary_operation",
23603            "clippy::unnecessary_sort_by",
23604            "clippy::unnecessary_unwrap",
23605            "clippy::unneeded_wildcard_pattern",
23606            "clippy::unused_format_specs",
23607            "clippy::useless_asref",
23608            "clippy::useless_conversion",
23609            "clippy::useless_format",
23610            "clippy::useless_transmute",
23611            "clippy::vec_box",
23612            "clippy::while_let_loop",
23613            "clippy::wildcard_in_or_patterns",
23614            "clippy::zero_divided_by_zero",
23615            "clippy::zero_prefixed_literal",
23616        ],
23617    },
23618    LintGroup {
23619        lint: Lint {
23620            label: "clippy::correctness",
23621            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"##,
23622            default_severity: Severity::Allow,
23623            warn_since: None,
23624            deny_since: None,
23625        },
23626        children: &[
23627            "clippy::absurd_extreme_comparisons",
23628            "clippy::almost_swapped",
23629            "clippy::approx_constant",
23630            "clippy::async_yields_async",
23631            "clippy::bad_bit_mask",
23632            "clippy::cast_slice_different_sizes",
23633            "clippy::deprecated_semver",
23634            "clippy::derive_ord_xor_partial_ord",
23635            "clippy::derived_hash_with_manual_eq",
23636            "clippy::eager_transmute",
23637            "clippy::enum_clike_unportable_variant",
23638            "clippy::eq_op",
23639            "clippy::erasing_op",
23640            "clippy::fn_address_comparisons",
23641            "clippy::if_let_mutex",
23642            "clippy::ifs_same_cond",
23643            "clippy::impl_hash_borrow_with_str_and_bytes",
23644            "clippy::impossible_comparisons",
23645            "clippy::ineffective_bit_mask",
23646            "clippy::infinite_iter",
23647            "clippy::inherent_to_string_shadow_display",
23648            "clippy::inline_fn_without_body",
23649            "clippy::invalid_null_ptr_usage",
23650            "clippy::invalid_regex",
23651            "clippy::inverted_saturating_sub",
23652            "clippy::invisible_characters",
23653            "clippy::iter_next_loop",
23654            "clippy::iter_skip_zero",
23655            "clippy::iterator_step_by_zero",
23656            "clippy::let_underscore_lock",
23657            "clippy::lint_groups_priority",
23658            "clippy::match_str_case_mismatch",
23659            "clippy::mem_replace_with_uninit",
23660            "clippy::min_max",
23661            "clippy::mistyped_literal_suffixes",
23662            "clippy::modulo_one",
23663            "clippy::mut_from_ref",
23664            "clippy::never_loop",
23665            "clippy::non_octal_unix_permissions",
23666            "clippy::nonsensical_open_options",
23667            "clippy::not_unsafe_ptr_arg_deref",
23668            "clippy::option_env_unwrap",
23669            "clippy::out_of_bounds_indexing",
23670            "clippy::overly_complex_bool_expr",
23671            "clippy::panicking_overflow_checks",
23672            "clippy::panicking_unwrap",
23673            "clippy::possible_missing_comma",
23674            "clippy::read_line_without_trim",
23675            "clippy::recursive_format_impl",
23676            "clippy::redundant_comparisons",
23677            "clippy::redundant_locals",
23678            "clippy::reversed_empty_ranges",
23679            "clippy::self_assignment",
23680            "clippy::serde_api_misuse",
23681            "clippy::size_of_in_element_count",
23682            "clippy::suspicious_splitn",
23683            "clippy::transmute_null_to_fn",
23684            "clippy::transmuting_null",
23685            "clippy::uninit_assumed_init",
23686            "clippy::uninit_vec",
23687            "clippy::unit_cmp",
23688            "clippy::unit_hash",
23689            "clippy::unit_return_expecting_ord",
23690            "clippy::unsound_collection_transmute",
23691            "clippy::unused_io_amount",
23692            "clippy::useless_attribute",
23693            "clippy::vec_resize_to_zero",
23694            "clippy::while_immutable_condition",
23695            "clippy::wrong_transmute",
23696            "clippy::zst_offset",
23697        ],
23698    },
23699    LintGroup {
23700        lint: Lint {
23701            label: "clippy::deprecated",
23702            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"##,
23703            default_severity: Severity::Allow,
23704            warn_since: None,
23705            deny_since: None,
23706        },
23707        children: &[
23708            "clippy::assign_ops",
23709            "clippy::extend_from_slice",
23710            "clippy::misaligned_transmute",
23711            "clippy::pub_enum_variant_names",
23712            "clippy::range_step_by_zero",
23713            "clippy::regex_macro",
23714            "clippy::replace_consts",
23715            "clippy::should_assert_eq",
23716            "clippy::unsafe_vector_initialization",
23717            "clippy::unstable_as_mut_slice",
23718            "clippy::unstable_as_slice",
23719            "clippy::unused_collect",
23720            "clippy::wrong_pub_self_convention",
23721        ],
23722    },
23723    LintGroup {
23724        lint: Lint {
23725            label: "clippy::nursery",
23726            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"##,
23727            default_severity: Severity::Allow,
23728            warn_since: None,
23729            deny_since: None,
23730        },
23731        children: &[
23732            "clippy::as_ptr_cast_mut",
23733            "clippy::branches_sharing_code",
23734            "clippy::clear_with_drain",
23735            "clippy::cognitive_complexity",
23736            "clippy::collection_is_never_read",
23737            "clippy::debug_assert_with_mut_call",
23738            "clippy::derive_partial_eq_without_eq",
23739            "clippy::equatable_if_let",
23740            "clippy::fallible_impl_from",
23741            "clippy::future_not_send",
23742            "clippy::imprecise_flops",
23743            "clippy::iter_on_empty_collections",
23744            "clippy::iter_on_single_items",
23745            "clippy::iter_with_drain",
23746            "clippy::large_stack_frames",
23747            "clippy::missing_const_for_fn",
23748            "clippy::mutex_integer",
23749            "clippy::needless_collect",
23750            "clippy::needless_pass_by_ref_mut",
23751            "clippy::non_send_fields_in_send_ty",
23752            "clippy::nonstandard_macro_braces",
23753            "clippy::option_if_let_else",
23754            "clippy::or_fun_call",
23755            "clippy::path_buf_push_overwrite",
23756            "clippy::read_zero_byte_vec",
23757            "clippy::redundant_clone",
23758            "clippy::redundant_pub_crate",
23759            "clippy::set_contains_or_insert",
23760            "clippy::significant_drop_in_scrutinee",
23761            "clippy::significant_drop_tightening",
23762            "clippy::string_lit_as_bytes",
23763            "clippy::suboptimal_flops",
23764            "clippy::suspicious_operation_groupings",
23765            "clippy::trailing_empty_array",
23766            "clippy::trait_duplication_in_bounds",
23767            "clippy::transmute_undefined_repr",
23768            "clippy::trivial_regex",
23769            "clippy::tuple_array_conversions",
23770            "clippy::type_repetition_in_bounds",
23771            "clippy::uninhabited_references",
23772            "clippy::unnecessary_struct_initialization",
23773            "clippy::unused_peekable",
23774            "clippy::unused_rounding",
23775            "clippy::use_self",
23776            "clippy::useless_let_if_seq",
23777            "clippy::while_float",
23778        ],
23779    },
23780    LintGroup {
23781        lint: Lint {
23782            label: "clippy::pedantic",
23783            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"##,
23784            default_severity: Severity::Allow,
23785            warn_since: None,
23786            deny_since: None,
23787        },
23788        children: &[
23789            "clippy::assigning_clones",
23790            "clippy::bool_to_int_with_if",
23791            "clippy::borrow_as_ptr",
23792            "clippy::case_sensitive_file_extension_comparisons",
23793            "clippy::cast_lossless",
23794            "clippy::cast_possible_truncation",
23795            "clippy::cast_possible_wrap",
23796            "clippy::cast_precision_loss",
23797            "clippy::cast_ptr_alignment",
23798            "clippy::cast_sign_loss",
23799            "clippy::checked_conversions",
23800            "clippy::cloned_instead_of_copied",
23801            "clippy::copy_iterator",
23802            "clippy::default_trait_access",
23803            "clippy::doc_link_with_quotes",
23804            "clippy::doc_markdown",
23805            "clippy::empty_enum",
23806            "clippy::enum_glob_use",
23807            "clippy::expl_impl_clone_on_copy",
23808            "clippy::explicit_deref_methods",
23809            "clippy::explicit_into_iter_loop",
23810            "clippy::explicit_iter_loop",
23811            "clippy::filter_map_next",
23812            "clippy::flat_map_option",
23813            "clippy::float_cmp",
23814            "clippy::fn_params_excessive_bools",
23815            "clippy::from_iter_instead_of_collect",
23816            "clippy::if_not_else",
23817            "clippy::ignored_unit_patterns",
23818            "clippy::implicit_clone",
23819            "clippy::implicit_hasher",
23820            "clippy::inconsistent_struct_constructor",
23821            "clippy::index_refutable_slice",
23822            "clippy::inefficient_to_string",
23823            "clippy::inline_always",
23824            "clippy::into_iter_without_iter",
23825            "clippy::invalid_upcast_comparisons",
23826            "clippy::items_after_statements",
23827            "clippy::iter_filter_is_ok",
23828            "clippy::iter_filter_is_some",
23829            "clippy::iter_not_returning_iterator",
23830            "clippy::iter_without_into_iter",
23831            "clippy::large_digit_groups",
23832            "clippy::large_futures",
23833            "clippy::large_stack_arrays",
23834            "clippy::large_types_passed_by_value",
23835            "clippy::linkedlist",
23836            "clippy::macro_use_imports",
23837            "clippy::manual_assert",
23838            "clippy::manual_instant_elapsed",
23839            "clippy::manual_is_variant_and",
23840            "clippy::manual_let_else",
23841            "clippy::manual_ok_or",
23842            "clippy::manual_string_new",
23843            "clippy::many_single_char_names",
23844            "clippy::map_unwrap_or",
23845            "clippy::match_bool",
23846            "clippy::match_on_vec_items",
23847            "clippy::match_same_arms",
23848            "clippy::match_wild_err_arm",
23849            "clippy::match_wildcard_for_single_variants",
23850            "clippy::maybe_infinite_iter",
23851            "clippy::mismatching_type_param_order",
23852            "clippy::missing_errors_doc",
23853            "clippy::missing_fields_in_debug",
23854            "clippy::missing_panics_doc",
23855            "clippy::module_name_repetitions",
23856            "clippy::must_use_candidate",
23857            "clippy::mut_mut",
23858            "clippy::naive_bytecount",
23859            "clippy::needless_bitwise_bool",
23860            "clippy::needless_continue",
23861            "clippy::needless_for_each",
23862            "clippy::needless_pass_by_value",
23863            "clippy::needless_raw_string_hashes",
23864            "clippy::no_effect_underscore_binding",
23865            "clippy::no_mangle_with_rust_abi",
23866            "clippy::option_as_ref_cloned",
23867            "clippy::option_option",
23868            "clippy::ptr_as_ptr",
23869            "clippy::ptr_cast_constness",
23870            "clippy::pub_underscore_fields",
23871            "clippy::range_minus_one",
23872            "clippy::range_plus_one",
23873            "clippy::redundant_closure_for_method_calls",
23874            "clippy::redundant_else",
23875            "clippy::ref_as_ptr",
23876            "clippy::ref_binding_to_reference",
23877            "clippy::ref_option",
23878            "clippy::ref_option_ref",
23879            "clippy::return_self_not_must_use",
23880            "clippy::same_functions_in_if_condition",
23881            "clippy::semicolon_if_nothing_returned",
23882            "clippy::should_panic_without_expect",
23883            "clippy::similar_names",
23884            "clippy::single_char_pattern",
23885            "clippy::single_match_else",
23886            "clippy::stable_sort_primitive",
23887            "clippy::str_split_at_newline",
23888            "clippy::string_add_assign",
23889            "clippy::struct_excessive_bools",
23890            "clippy::struct_field_names",
23891            "clippy::too_many_lines",
23892            "clippy::transmute_ptr_to_ptr",
23893            "clippy::trivially_copy_pass_by_ref",
23894            "clippy::unchecked_duration_subtraction",
23895            "clippy::unicode_not_nfc",
23896            "clippy::uninlined_format_args",
23897            "clippy::unnecessary_box_returns",
23898            "clippy::unnecessary_join",
23899            "clippy::unnecessary_wraps",
23900            "clippy::unnested_or_patterns",
23901            "clippy::unreadable_literal",
23902            "clippy::unsafe_derive_deserialize",
23903            "clippy::unused_async",
23904            "clippy::unused_self",
23905            "clippy::used_underscore_binding",
23906            "clippy::used_underscore_items",
23907            "clippy::verbose_bit_mask",
23908            "clippy::wildcard_imports",
23909            "clippy::zero_sized_map_values",
23910        ],
23911    },
23912    LintGroup {
23913        lint: Lint {
23914            label: "clippy::perf",
23915            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"##,
23916            default_severity: Severity::Allow,
23917            warn_since: None,
23918            deny_since: None,
23919        },
23920        children: &[
23921            "clippy::box_collection",
23922            "clippy::boxed_local",
23923            "clippy::cmp_owned",
23924            "clippy::collapsible_str_replace",
23925            "clippy::drain_collect",
23926            "clippy::expect_fun_call",
23927            "clippy::extend_with_drain",
23928            "clippy::format_collect",
23929            "clippy::format_in_format_args",
23930            "clippy::iter_overeager_cloned",
23931            "clippy::large_const_arrays",
23932            "clippy::large_enum_variant",
23933            "clippy::manual_memcpy",
23934            "clippy::manual_retain",
23935            "clippy::manual_str_repeat",
23936            "clippy::manual_try_fold",
23937            "clippy::map_entry",
23938            "clippy::missing_const_for_thread_local",
23939            "clippy::missing_spin_loop",
23940            "clippy::readonly_write_lock",
23941            "clippy::redundant_allocation",
23942            "clippy::result_large_err",
23943            "clippy::slow_vector_initialization",
23944            "clippy::to_string_in_format_args",
23945            "clippy::unnecessary_to_owned",
23946            "clippy::useless_vec",
23947            "clippy::vec_init_then_push",
23948            "clippy::waker_clone_wake",
23949        ],
23950    },
23951    LintGroup {
23952        lint: Lint {
23953            label: "clippy::restriction",
23954            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"##,
23955            default_severity: Severity::Allow,
23956            warn_since: None,
23957            deny_since: None,
23958        },
23959        children: &[
23960            "clippy::absolute_paths",
23961            "clippy::alloc_instead_of_core",
23962            "clippy::allow_attributes",
23963            "clippy::allow_attributes_without_reason",
23964            "clippy::arithmetic_side_effects",
23965            "clippy::as_conversions",
23966            "clippy::as_underscore",
23967            "clippy::assertions_on_result_states",
23968            "clippy::big_endian_bytes",
23969            "clippy::cfg_not_test",
23970            "clippy::clone_on_ref_ptr",
23971            "clippy::create_dir",
23972            "clippy::dbg_macro",
23973            "clippy::decimal_literal_representation",
23974            "clippy::default_numeric_fallback",
23975            "clippy::default_union_representation",
23976            "clippy::deref_by_slicing",
23977            "clippy::disallowed_script_idents",
23978            "clippy::else_if_without_else",
23979            "clippy::empty_drop",
23980            "clippy::empty_enum_variants_with_brackets",
23981            "clippy::empty_structs_with_brackets",
23982            "clippy::error_impl_error",
23983            "clippy::exhaustive_enums",
23984            "clippy::exhaustive_structs",
23985            "clippy::exit",
23986            "clippy::expect_used",
23987            "clippy::field_scoped_visibility_modifiers",
23988            "clippy::filetype_is_file",
23989            "clippy::float_arithmetic",
23990            "clippy::float_cmp_const",
23991            "clippy::fn_to_numeric_cast_any",
23992            "clippy::format_push_string",
23993            "clippy::get_unwrap",
23994            "clippy::host_endian_bytes",
23995            "clippy::if_then_some_else_none",
23996            "clippy::impl_trait_in_params",
23997            "clippy::implicit_return",
23998            "clippy::indexing_slicing",
23999            "clippy::infinite_loop",
24000            "clippy::inline_asm_x86_att_syntax",
24001            "clippy::inline_asm_x86_intel_syntax",
24002            "clippy::integer_division",
24003            "clippy::integer_division_remainder_used",
24004            "clippy::iter_over_hash_type",
24005            "clippy::large_include_file",
24006            "clippy::let_underscore_must_use",
24007            "clippy::let_underscore_untyped",
24008            "clippy::little_endian_bytes",
24009            "clippy::lossy_float_literal",
24010            "clippy::map_err_ignore",
24011            "clippy::mem_forget",
24012            "clippy::min_ident_chars",
24013            "clippy::missing_assert_message",
24014            "clippy::missing_asserts_for_indexing",
24015            "clippy::missing_docs_in_private_items",
24016            "clippy::missing_inline_in_public_items",
24017            "clippy::missing_trait_methods",
24018            "clippy::mixed_read_write_in_expression",
24019            "clippy::mod_module_files",
24020            "clippy::modulo_arithmetic",
24021            "clippy::multiple_inherent_impl",
24022            "clippy::multiple_unsafe_ops_per_block",
24023            "clippy::mutex_atomic",
24024            "clippy::needless_raw_strings",
24025            "clippy::non_ascii_literal",
24026            "clippy::non_zero_suggestions",
24027            "clippy::panic",
24028            "clippy::panic_in_result_fn",
24029            "clippy::partial_pub_fields",
24030            "clippy::pathbuf_init_then_push",
24031            "clippy::pattern_type_mismatch",
24032            "clippy::print_stderr",
24033            "clippy::print_stdout",
24034            "clippy::pub_use",
24035            "clippy::pub_with_shorthand",
24036            "clippy::pub_without_shorthand",
24037            "clippy::question_mark_used",
24038            "clippy::rc_buffer",
24039            "clippy::rc_mutex",
24040            "clippy::redundant_type_annotations",
24041            "clippy::ref_patterns",
24042            "clippy::renamed_function_params",
24043            "clippy::rest_pat_in_fully_bound_structs",
24044            "clippy::same_name_method",
24045            "clippy::self_named_module_files",
24046            "clippy::semicolon_inside_block",
24047            "clippy::semicolon_outside_block",
24048            "clippy::separated_literal_suffix",
24049            "clippy::shadow_reuse",
24050            "clippy::shadow_same",
24051            "clippy::shadow_unrelated",
24052            "clippy::single_call_fn",
24053            "clippy::single_char_lifetime_names",
24054            "clippy::std_instead_of_alloc",
24055            "clippy::std_instead_of_core",
24056            "clippy::str_to_string",
24057            "clippy::string_add",
24058            "clippy::string_lit_chars_any",
24059            "clippy::string_slice",
24060            "clippy::string_to_string",
24061            "clippy::suspicious_xor_used_as_pow",
24062            "clippy::tests_outside_test_module",
24063            "clippy::todo",
24064            "clippy::try_err",
24065            "clippy::undocumented_unsafe_blocks",
24066            "clippy::unimplemented",
24067            "clippy::unnecessary_safety_comment",
24068            "clippy::unnecessary_safety_doc",
24069            "clippy::unnecessary_self_imports",
24070            "clippy::unneeded_field_pattern",
24071            "clippy::unreachable",
24072            "clippy::unseparated_literal_suffix",
24073            "clippy::unused_result_ok",
24074            "clippy::unused_trait_names",
24075            "clippy::unwrap_in_result",
24076            "clippy::unwrap_used",
24077            "clippy::use_debug",
24078            "clippy::verbose_file_reads",
24079            "clippy::wildcard_enum_match_arm",
24080        ],
24081    },
24082    LintGroup {
24083        lint: Lint {
24084            label: "clippy::style",
24085            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"##,
24086            default_severity: Severity::Allow,
24087            warn_since: None,
24088            deny_since: None,
24089        },
24090        children: &[
24091            "clippy::assertions_on_constants",
24092            "clippy::assign_op_pattern",
24093            "clippy::blocks_in_conditions",
24094            "clippy::bool_assert_comparison",
24095            "clippy::borrow_interior_mutable_const",
24096            "clippy::box_default",
24097            "clippy::builtin_type_shadow",
24098            "clippy::byte_char_slices",
24099            "clippy::bytes_nth",
24100            "clippy::chars_last_cmp",
24101            "clippy::chars_next_cmp",
24102            "clippy::cmp_null",
24103            "clippy::collapsible_else_if",
24104            "clippy::collapsible_if",
24105            "clippy::collapsible_match",
24106            "clippy::comparison_chain",
24107            "clippy::comparison_to_empty",
24108            "clippy::declare_interior_mutable_const",
24109            "clippy::default_instead_of_iter_empty",
24110            "clippy::disallowed_macros",
24111            "clippy::disallowed_methods",
24112            "clippy::disallowed_names",
24113            "clippy::disallowed_types",
24114            "clippy::doc_lazy_continuation",
24115            "clippy::double_must_use",
24116            "clippy::double_neg",
24117            "clippy::duplicate_underscore_argument",
24118            "clippy::enum_variant_names",
24119            "clippy::err_expect",
24120            "clippy::excessive_precision",
24121            "clippy::field_reassign_with_default",
24122            "clippy::filter_map_bool_then",
24123            "clippy::fn_to_numeric_cast",
24124            "clippy::fn_to_numeric_cast_with_truncation",
24125            "clippy::for_kv_map",
24126            "clippy::from_over_into",
24127            "clippy::from_str_radix_10",
24128            "clippy::get_first",
24129            "clippy::if_same_then_else",
24130            "clippy::implicit_saturating_add",
24131            "clippy::implicit_saturating_sub",
24132            "clippy::inconsistent_digit_grouping",
24133            "clippy::infallible_destructuring_match",
24134            "clippy::inherent_to_string",
24135            "clippy::init_numbered_fields",
24136            "clippy::into_iter_on_ref",
24137            "clippy::is_digit_ascii_radix",
24138            "clippy::items_after_test_module",
24139            "clippy::iter_cloned_collect",
24140            "clippy::iter_next_slice",
24141            "clippy::iter_nth",
24142            "clippy::iter_nth_zero",
24143            "clippy::iter_skip_next",
24144            "clippy::just_underscores_and_digits",
24145            "clippy::legacy_numeric_constants",
24146            "clippy::len_without_is_empty",
24147            "clippy::len_zero",
24148            "clippy::let_and_return",
24149            "clippy::let_unit_value",
24150            "clippy::main_recursion",
24151            "clippy::manual_async_fn",
24152            "clippy::manual_bits",
24153            "clippy::manual_is_ascii_check",
24154            "clippy::manual_is_finite",
24155            "clippy::manual_is_infinite",
24156            "clippy::manual_map",
24157            "clippy::manual_next_back",
24158            "clippy::manual_non_exhaustive",
24159            "clippy::manual_pattern_char_comparison",
24160            "clippy::manual_range_contains",
24161            "clippy::manual_rotate",
24162            "clippy::manual_saturating_arithmetic",
24163            "clippy::manual_while_let_some",
24164            "clippy::map_clone",
24165            "clippy::map_collect_result_unit",
24166            "clippy::match_like_matches_macro",
24167            "clippy::match_overlapping_arm",
24168            "clippy::match_ref_pats",
24169            "clippy::match_result_ok",
24170            "clippy::mem_replace_option_with_none",
24171            "clippy::mem_replace_with_default",
24172            "clippy::missing_enforced_import_renames",
24173            "clippy::missing_safety_doc",
24174            "clippy::mixed_attributes_style",
24175            "clippy::mixed_case_hex_literals",
24176            "clippy::module_inception",
24177            "clippy::must_use_unit",
24178            "clippy::mut_mutex_lock",
24179            "clippy::needless_borrow",
24180            "clippy::needless_borrows_for_generic_args",
24181            "clippy::needless_doctest_main",
24182            "clippy::needless_else",
24183            "clippy::needless_late_init",
24184            "clippy::needless_parens_on_range_literals",
24185            "clippy::needless_pub_self",
24186            "clippy::needless_range_loop",
24187            "clippy::needless_return",
24188            "clippy::needless_return_with_question_mark",
24189            "clippy::neg_multiply",
24190            "clippy::new_ret_no_self",
24191            "clippy::new_without_default",
24192            "clippy::non_minimal_cfg",
24193            "clippy::obfuscated_if_else",
24194            "clippy::ok_expect",
24195            "clippy::op_ref",
24196            "clippy::option_map_or_err_ok",
24197            "clippy::option_map_or_none",
24198            "clippy::partialeq_to_none",
24199            "clippy::print_literal",
24200            "clippy::print_with_newline",
24201            "clippy::println_empty_string",
24202            "clippy::ptr_arg",
24203            "clippy::ptr_eq",
24204            "clippy::question_mark",
24205            "clippy::redundant_closure",
24206            "clippy::redundant_field_names",
24207            "clippy::redundant_pattern",
24208            "clippy::redundant_pattern_matching",
24209            "clippy::redundant_static_lifetimes",
24210            "clippy::result_map_or_into_option",
24211            "clippy::result_unit_err",
24212            "clippy::same_item_push",
24213            "clippy::self_named_constructors",
24214            "clippy::should_implement_trait",
24215            "clippy::single_char_add_str",
24216            "clippy::single_component_path_imports",
24217            "clippy::single_match",
24218            "clippy::string_extend_chars",
24219            "clippy::tabs_in_doc_comments",
24220            "clippy::to_digit_is_some",
24221            "clippy::to_string_trait_impl",
24222            "clippy::too_long_first_doc_paragraph",
24223            "clippy::toplevel_ref_arg",
24224            "clippy::trim_split_whitespace",
24225            "clippy::unnecessary_fallible_conversions",
24226            "clippy::unnecessary_fold",
24227            "clippy::unnecessary_lazy_evaluations",
24228            "clippy::unnecessary_mut_passed",
24229            "clippy::unnecessary_owned_empty_strings",
24230            "clippy::unsafe_removed_from_name",
24231            "clippy::unused_enumerate_index",
24232            "clippy::unused_unit",
24233            "clippy::unusual_byte_groupings",
24234            "clippy::unwrap_or_default",
24235            "clippy::upper_case_acronyms",
24236            "clippy::while_let_on_iterator",
24237            "clippy::write_literal",
24238            "clippy::write_with_newline",
24239            "clippy::writeln_empty_string",
24240            "clippy::wrong_self_convention",
24241            "clippy::zero_ptr",
24242        ],
24243    },
24244    LintGroup {
24245        lint: Lint {
24246            label: "clippy::suspicious",
24247            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"##,
24248            default_severity: Severity::Allow,
24249            warn_since: None,
24250            deny_since: None,
24251        },
24252        children: &[
24253            "clippy::almost_complete_range",
24254            "clippy::arc_with_non_send_sync",
24255            "clippy::await_holding_invalid_type",
24256            "clippy::await_holding_lock",
24257            "clippy::await_holding_refcell_ref",
24258            "clippy::blanket_clippy_restriction_lints",
24259            "clippy::cast_abs_to_unsigned",
24260            "clippy::cast_enum_constructor",
24261            "clippy::cast_enum_truncation",
24262            "clippy::cast_nan_to_int",
24263            "clippy::cast_slice_from_raw_parts",
24264            "clippy::const_is_empty",
24265            "clippy::crate_in_macro_def",
24266            "clippy::deprecated_clippy_cfg_attr",
24267            "clippy::drop_non_drop",
24268            "clippy::duplicate_mod",
24269            "clippy::duplicated_attributes",
24270            "clippy::empty_docs",
24271            "clippy::empty_line_after_doc_comments",
24272            "clippy::empty_line_after_outer_attr",
24273            "clippy::empty_loop",
24274            "clippy::float_equality_without_abs",
24275            "clippy::forget_non_drop",
24276            "clippy::four_forward_slashes",
24277            "clippy::from_raw_with_void_ptr",
24278            "clippy::incompatible_msrv",
24279            "clippy::ineffective_open_options",
24280            "clippy::iter_out_of_bounds",
24281            "clippy::join_absolute_paths",
24282            "clippy::let_underscore_future",
24283            "clippy::lines_filter_map_ok",
24284            "clippy::macro_metavars_in_unsafe",
24285            "clippy::manual_unwrap_or_default",
24286            "clippy::misnamed_getters",
24287            "clippy::misrefactored_assign_op",
24288            "clippy::missing_transmute_annotations",
24289            "clippy::multi_assignments",
24290            "clippy::multiple_bound_locations",
24291            "clippy::mut_range_bound",
24292            "clippy::mutable_key_type",
24293            "clippy::needless_character_iteration",
24294            "clippy::needless_maybe_sized",
24295            "clippy::no_effect_replace",
24296            "clippy::non_canonical_clone_impl",
24297            "clippy::non_canonical_partial_ord_impl",
24298            "clippy::octal_escapes",
24299            "clippy::path_ends_with_ext",
24300            "clippy::permissions_set_readonly_false",
24301            "clippy::pointers_in_nomem_asm_block",
24302            "clippy::print_in_format_impl",
24303            "clippy::rc_clone_in_vec_init",
24304            "clippy::repeat_vec_with_capacity",
24305            "clippy::single_range_in_vec_init",
24306            "clippy::size_of_ref",
24307            "clippy::suspicious_arithmetic_impl",
24308            "clippy::suspicious_assignment_formatting",
24309            "clippy::suspicious_command_arg_space",
24310            "clippy::suspicious_doc_comments",
24311            "clippy::suspicious_else_formatting",
24312            "clippy::suspicious_map",
24313            "clippy::suspicious_op_assign_impl",
24314            "clippy::suspicious_open_options",
24315            "clippy::suspicious_to_owned",
24316            "clippy::suspicious_unary_op_formatting",
24317            "clippy::swap_ptr_to_ref",
24318            "clippy::test_attr_in_doctest",
24319            "clippy::type_id_on_box",
24320            "clippy::unconditional_recursion",
24321            "clippy::unnecessary_clippy_cfg",
24322            "clippy::unnecessary_get_then_check",
24323            "clippy::unnecessary_result_map_or_else",
24324            "clippy::zero_repeat_side_effects",
24325            "clippy::zombie_processes",
24326        ],
24327    },
24328];
ide_db/generated/lints.rs

ide_db/generated/
lints.rs
