rust/tests/ui/impl-trait/normalize-tait-in-const.rs

38 lines
626 B
Rust

//@ known-bug: #103507
#![feature(type_alias_impl_trait)]
#![feature(const_trait_impl)]
#![feature(const_refs_to_cell)]
use std::marker::Destruct;
mod foo {
trait T {
type Item;
}
pub type Alias<'a> = impl T<Item = &'a ()>;
struct S;
impl<'a> T for &'a S {
type Item = &'a ();
}
pub const fn filter_positive<'a>() -> &'a Alias<'a> {
&&S
}
}
use foo::*;
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() {}