rust/tests/ui/traits/non_lifetime_binders/unifying-placeholders-in-query-response.rs

29 lines
546 B
Rust

//@ revisions: current next
//@ ignore-compare-mode-next-solver (explicit revisions)
//@[next] compile-flags: -Znext-solver
//@ check-pass
#![feature(non_lifetime_binders)]
//~^ WARN the feature `non_lifetime_binders` is incomplete
pub trait Foo<T: ?Sized> {
type Bar<K: ?Sized>: ?Sized;
}
impl Foo<usize> for () {
type Bar<K: ?Sized> = K;
}
pub fn f<T1, T2>(a: T1, b: T2)
where
T1: for<T> Foo<usize, Bar<T> = T>,
T2: for<T> Foo<usize, Bar<T> = <T1 as Foo<usize>>::Bar<T>>,
{
}
fn it_works() {
f((), ());
}
fn main() {}