mirror of
https://github.com/rust-lang/rust.git
synced 2024-12-04 20:54:13 +00:00
28 lines
389 B
Rust
28 lines
389 B
Rust
pub trait Foo {
|
|
type Associated;
|
|
}
|
|
|
|
pub struct X;
|
|
pub struct Y;
|
|
|
|
|
|
impl Foo for X {
|
|
type Associated = ();
|
|
}
|
|
|
|
impl Foo for Y {
|
|
type Associated = ();
|
|
}
|
|
|
|
impl X {
|
|
pub fn returns_sized<'a>(&'a self) -> impl Foo<Associated=()> + 'a {
|
|
X
|
|
}
|
|
}
|
|
|
|
impl Y {
|
|
pub fn returns_unsized<'a>(&'a self) -> Box<impl ?Sized + Foo<Associated=()> + 'a> {
|
|
Box::new(X)
|
|
}
|
|
}
|