30 lines
433 B
Rust
30 lines
433 B
Rust
#![feature(type_alias_impl_trait)]
|
|
|
|
//@ check-pass
|
|
|
|
mod helper {
|
|
pub trait T {
|
|
type Item;
|
|
}
|
|
|
|
pub type Alias<'a> = impl T<Item = &'a ()>;
|
|
|
|
struct S;
|
|
impl<'a> T for &'a S {
|
|
type Item = &'a ();
|
|
}
|
|
|
|
pub fn filter_positive<'a>() -> Alias<'a> {
|
|
&S
|
|
}
|
|
}
|
|
use helper::*;
|
|
|
|
fn with_positive(fun: impl Fn(Alias<'_>)) {
|
|
fun(filter_positive());
|
|
}
|
|
|
|
fn main() {
|
|
with_positive(|_| ());
|
|
}
|