| //@ check-pass |
| // See issue #109356. We don't want a false positive to the `implied_bounds_entailment` lint. |
| |
| use std::borrow::Cow; |
| |
| pub trait Trait { |
| fn method(self) -> Option<Cow<'static, str>> |
| where |
| Self: Sized; |
| } |
| |
| impl<'a> Trait for Cow<'a, str> { |
| // If we're not careful here, we'll check `WF(return-type)` using the trait |
| // and impl where clauses, requiring that `Cow<'a, str>: Sized`. This is |
| // obviously true, but if we pick the `Self: Sized` clause from the trait |
| // over the "inherent impl", we will require `'a == 'static`, which triggers |
| // the `implied_bounds_entailment` lint. |
| fn method(self) -> Option<Cow<'static, str>> { |
| None |
| } |
| } |
| |
| fn main() {} |
