| //@ check-pass |
| //@ compile-flags: -Znext-solver |
| |
| // check that a goal such as `alias-eq(<T as TraitB>::Assoc<bool>, <T as TraitB>::Assoc<?0>)` |
| // succeeds with a constraint that `?0 = bool` |
| |
| // FIXME(deferred_projection_equality): add a test that this is true during coherence |
| |
| trait TraitA {} |
| |
| trait TraitB { |
| type Assoc<T: ?Sized>; |
| } |
| |
| impl<T: TraitB> TraitA for (T, T::Assoc<bool>) {} |
| |
| impl TraitB for i32 { |
| type Assoc<T: ?Sized> = u32; |
| } |
| |
| fn needs_a<T: TraitA>() {} |
| |
| fn bar<T: TraitB>() { |
| needs_a::<(T, <T as TraitB>::Assoc<_>)>(); |
| } |
| |
| fn main() { |
| bar::<i32>(); |
| } |