src/test/ui/const-generics/generic_const_exprs/evaluated-to-ambig.rs

   1 // check-pass
   2
   3 // We previously always returned ambiguity when equating generic consts, even if they
   4 // only contain generic parameters. This is incorrect as trying to unify `N > 1` with `M > 1`
   5 // should fail.
   6 #![allow(incomplete_features)]
   7 #![feature(generic_const_exprs)]
   8
   9 enum Assert<const COND: bool> {}
  10 trait IsTrue {}
  11 impl IsTrue for Assert<true> {}
  12
  13 struct Foo<const N: usize, const M: usize>;
  14 trait Bar<const N: usize, const M: usize> {}
  15 impl<const N: usize, const M: usize> Bar<N, M> for Foo<N, M>
  16 where
  17     Assert<{ N > 1 }>: IsTrue,
  18     Assert<{ M > 1 }>: IsTrue,
  19 {
  20 }
  21
  22 fn main() {}