| // build-pass (FIXME(62277): could be 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. |
| |
| // pretty-expanded FIXME #23616 |
| |
| 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() |
| } |
| } |