35 lines
550 B
Rust
35 lines
550 B
Rust
//@ known-bug: #103507
|
|
|
|
#![feature(type_alias_impl_trait)]
|
|
#![feature(const_trait_impl)]
|
|
#![feature(const_refs_to_cell)]
|
|
|
|
use std::marker::Destruct;
|
|
|
|
trait T {
|
|
type Item;
|
|
}
|
|
|
|
type Alias<'a> = impl T<Item = &'a ()>;
|
|
|
|
struct S;
|
|
impl<'a> T for &'a S {
|
|
type Item = &'a ();
|
|
}
|
|
|
|
const fn filter_positive<'a>() -> &'a Alias<'a> {
|
|
&&S
|
|
}
|
|
|
|
const fn with_positive<F: ~const for<'a> Fn(&'a Alias<'a>) + ~const Destruct>(fun: F) {
|
|
fun(filter_positive());
|
|
}
|
|
|
|
const fn foo(_: &Alias<'_>) {}
|
|
|
|
const BAR: () = {
|
|
with_positive(foo);
|
|
};
|
|
|
|
fn main() {}
|