| // Test that impls on projected self types can resolve overlap, even when the |
| // projections involve specialization, so long as the associated type is |
| // provided by the most specialized impl. |
| #![feature(specialization)] |
| //~^ WARN the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes |
| |
| trait Assoc { |
| type Output; |
| } |
| |
| impl<T> Assoc for T { |
| default type Output = bool; |
| } |
| |
| impl Assoc for u8 { type Output = u8; } |
| impl Assoc for u16 { type Output = u16; } |
| |
| trait Foo {} |
| impl Foo for u32 {} |
| impl Foo for <u8 as Assoc>::Output {} |
| //~^ ERROR conflicting implementations of trait `Foo` for type `u32` |
| impl Foo for <u16 as Assoc>::Output {} |
| //~^ ERROR conflicting implementations of trait `Foo` for type `u32` |
| |
| fn main() {} |
