mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-26 08:44:35 +00:00
29 lines
540 B
Rust
29 lines
540 B
Rust
use std::mem;
|
|
|
|
trait Trait1<T> {}
|
|
trait Trait2<'a> {
|
|
type Ty;
|
|
}
|
|
|
|
fn _ice(param: Box<dyn for <'a> Trait1<<() as Trait2<'a>>::Ty>>) {
|
|
//~^ ERROR the trait bound `for<'a> (): Trait2<'a>` is not satisfied
|
|
let _e: (usize, usize) = unsafe{mem::transmute(param)};
|
|
}
|
|
|
|
trait Lifetime<'a> {
|
|
type Out;
|
|
}
|
|
impl<'a> Lifetime<'a> for () {
|
|
type Out = &'a ();
|
|
}
|
|
fn foo<'a>(x: &'a ()) -> <() as Lifetime<'a>>::Out {
|
|
x
|
|
}
|
|
|
|
fn takes_lifetime(_f: for<'a> fn(&'a ()) -> <() as Lifetime<'a>>::Out) {
|
|
}
|
|
|
|
fn main() {
|
|
takes_lifetime(foo);
|
|
}
|