rust/tests/ui/nll/ty-outlives/projection-body.rs

30 lines
442 B
Rust

// Test that when we infer the lifetime to a subset of the fn body, it
// works out.
//
// check-pass
#![allow(drop_ref)]
trait MyTrait<'a> {
type Output;
}
fn foo1<T>()
where
for<'x> T: MyTrait<'x>,
{
// Here the region `'c` in `<T as MyTrait<'c>>::Output` will be
// inferred to a subset of the fn body.
let x = bar::<T::Output>();
drop(x);
}
fn bar<'a, T>() -> &'a ()
where
T: 'a,
{
&()
}
fn main() {}