tests/ui/coherence/coherence-negative-outlives-lifetimes.rs

   1 // revisions: stock with_negative_coherence
   2 //[with_negative_coherence] check-pass
   3
   4 #![feature(negative_impls)]
   5 #![cfg_attr(with_negative_coherence, feature(with_negative_coherence))]
   6
   7 trait MyPredicate<'a> {}
   8
   9 impl<'a, T> !MyPredicate<'a> for &'a T where T: 'a {}
  10
  11 trait MyTrait<'a> {}
  12
  13 impl<'a, T: MyPredicate<'a>> MyTrait<'a> for T {}
  14 impl<'a, T> MyTrait<'a> for &'a T {}
  15 //[stock]~^ ERROR: conflicting implementations of trait `MyTrait<'_>` for type `&_`
  16
  17 fn main() {}