Test main

Source location: tests/mir_typeck.rs:1438

fn main() -> () { require_marker::<S>(); }
}])
tc_err(expect_test::expect![[r#"
error[E0277]: the trait bound `S: Marker` is not satisfied
  --> lib.rs
   |
13 |     require_marker::<S>();
   |                      ^ unsatisfied trait bound
   |
help: the trait `Marker` is not implemented for `S`
  --> lib.rs
   |
 3 | pub struct S {}
   | ^^^^^^^^^^^^
help: this trait has no implementations, consider adding one
  --> lib.rs
   |
 1 | pub trait Marker {}
   | ^^^^^^^^^^^^^^^^
note: required by a bound in `require_marker`
  --> lib.rs
   |
 5 | pub fn require_marker<T00>() -> ()
   |        -------------- required by a bound in this function
 6 | where
 7 |     T00: Marker,
   |          ^^^^^^ required by this bound in `require_marker`

For more information about this error, try `rustc --explain E0277`.
error: could not compile `test` (lib) due to 1 previous error
)
(expect_test::expect![[r#"
the rule "trait implied bound" at (prove_predicate.rs) failed because
  expression evaluated to an empty collection: `decls.trait_invariants()`"#]]);
}

ng the function with a type that implements `Marker` is accepted.
#[test]
generic_fn_value_with_satisfied_where_clause() {
alityTest::new(crates![crate test {
trait Marker {}
impl Marker for u32 {}
fn require_marker<T>() -> () where T: Marker {}
fn main() -> () { require_marker::<u32>; }
}])
tc_ok()
);
}

#[test]
fn_value_with_forwarded_trait_bound() {
alityTest::new(crates![crate Foo {
trait Marker {}
impl Marker for u32 {}
fn require<T>() -> () where T: Marker {}
fn outer<T>() -> () where T: Marker { require::<T>; }
fn main() -> () { outer::<u32>(); }
}])
tc_ok()
);
}

#[test]
bare_fn_value_with_satisfied_where_clause() {
alityTest::new(crates![crate Foo {
trait Marker {}
impl Marker for u32 {}
fn require() -> () where u32: Marker {}
fn main() -> () { require; }
}])
tc_ok()
);
}

#[test]
fn_value_with_forwarded_lifetime_bound() {
alityTest::new(crates![crate Foo {
fn require<'a, 'b>() -> () where 'a: 'b {}
fn outer<'a, 'b>() -> () where 'a: 'b { require::<'a, 'b>; }
fn main() -> () { outer::<'static, 'static>(); }
}])
tc_ok()
);
}

#[test]
fn_value_with_unsatisfied_lifetime_bound() {
alityTest::new(crates![crate Foo {
fn require<'a, 'b>() -> () where 'a: 'b {}
fn outer<'a, 'b>() -> () { require::<'a, 'b>; }
fn main() -> () {}
}])
tc_err(expect_test::expect![[r#"
error: lifetime may not live long enough
 --> lib.rs
  |
7 | pub fn outer<'a00, 'a01>() -> () {
  |              ----  ---- lifetime `'a01` defined here
  |              |
  |              lifetime `'a00` defined here
8 |     require::<'a00, 'a01>;
  |     ^^^^^^^^^^^^^^^^^^^^^ requires that `'a00` must outlive `'a01`
  |
  = help: consider adding the following bound: `'a00: 'a01`

error: could not compile `Foo` (lib) due to 1 previous error
)
(expect_test::expect!["crates/formality-rust/src/prove/prove_outlives.rs:8:1: no applicable rules for prove_outlives { a: !lt_0, b: !lt_1, assumptions: {}, env: Env { variables: [!lt_0, !lt_1], bias: Soundness, pending: [], allow_pending_outlives: false } }"]);
}

ound assignment of an integer of a different type should fail.
#[test]
compound_add_mismatched_int_types() {
alityTest::new(crates![crate Foo {
fn foo() -> () {
    let x: u32 = 1_u32;
    x += 2_u8;
}

Rules proved (0)

This test records no positive coverage.

Premises failed (14)

The last column links to the premise’s page when the judgment view counts this failure against that premise. It does not when the premise is read as infallible, or when the failure was blamed inside a multi-line premise that carries no record on its own first line.

Proof trees

How to read this page