| // check-pass | |
| #![feature(optin_builtin_traits)] | |
| #![feature(negative_impls)] | |
| auto trait NotSame {} | |
| impl<A> !NotSame for (A, A) {} | |
| trait OneOfEach {} | |
| impl<A> OneOfEach for (A,) {} | |
| impl<A, B> OneOfEach for (A, B) | |
| where | |
| (B,): OneOfEach, | |
| (A, B): NotSame, | |
| { | |
| } | |
| fn main() {} |