mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-27 09:14:20 +00:00
35 lines
605 B
Rust
35 lines
605 B
Rust
// Test that `impl MyTrait for Foo<'_>` works.
|
|
|
|
// run-pass
|
|
|
|
#![allow(warnings)]
|
|
|
|
trait MyTrait { }
|
|
|
|
struct Foo<'a> { x: &'a u32 }
|
|
|
|
impl MyTrait for Foo<'_> {
|
|
}
|
|
|
|
fn impls_my_trait<T: MyTrait>() { }
|
|
|
|
fn impls_my_trait_val<T: MyTrait>(_: T) {
|
|
impls_my_trait::<T>();
|
|
}
|
|
|
|
fn random_where_clause()
|
|
where for<'a> Foo<'a>: MyTrait { }
|
|
|
|
fn main() {
|
|
let x = 22;
|
|
let f = Foo { x: &x };
|
|
|
|
// This type is `Foo<'x>` for a local lifetime `'x`; so the impl
|
|
// must apply to any lifetime to apply to this.
|
|
impls_my_trait_val(f);
|
|
|
|
impls_my_trait::<Foo<'static>>();
|
|
|
|
random_where_clause();
|
|
}
|