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//@ check-pass
#![allow(dead_code)]
// Regression test for #21726: an issue arose around the rules for
// subtyping of projection types that resulted in an unconstrained
// region, yielding region inference failures.
fn main() { }
fn foo<'a>(s: &'a str) {
let b: B<()> = B::new(s, ());
b.get_short();
}
trait IntoRef<'a> {
type T: Clone;
fn into_ref(self, _: &'a str) -> Self::T;
}
impl<'a> IntoRef<'a> for () {
type T = &'a str;
fn into_ref(self, s: &'a str) -> &'a str {
s
}
}
struct B<'a, P: IntoRef<'a>>(P::T);
impl<'a, P: IntoRef<'a>> B<'a, P> {
fn new(s: &'a str, i: P) -> B<'a, P> {
B(i.into_ref(s))
}
fn get_short(&self) -> P::T {
self.0.clone()
}
}
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