rust/tests/ui/higher-ranked/leak-check-in-selection.rs

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2023-05-23 12:34:17 -05:00
// run-pass
// revisions: old next
//[next] compile-flags: -Ztrait-solver=next
#![allow(coherence_leak_check)]
trait Trait: Sized {
fn is_higher_ranked(self) -> bool;
}
impl Trait for for<'a> fn(&'a ()) {
fn is_higher_ranked(self) -> bool {
true
}
}
impl<'a> Trait for fn(&'a ()) {
fn is_higher_ranked(self) -> bool {
false
}
}
fn main() {
let x: for<'a> fn(&'a ()) = |&()| ();
assert!(x.is_higher_ranked());
}