src/test/ui/const-generics/generic_const_exprs/object-safety-ok-infer-err.rs

   1 #![feature(generic_const_exprs)]
   2 #![allow(incomplete_features)]
   3
   4 trait Foo<const N: usize> {
   5     fn test(&self) -> [u8; N + 1];
   6 }
   7
   8 impl<const N: usize> Foo<N> for () {
   9     fn test(&self) -> [u8; N + 1] {
  10         [0; N + 1]
  11     }
  12 }
  13
  14 fn use_dyn<const N: usize>(v: &dyn Foo<N>) where [u8; N + 1]: Sized {
  15     assert_eq!(v.test(), [0; N + 1]);
  16 }
  17
  18 fn main() {
  19     use_dyn(&());
  20     //~^ ERROR type annotations needed
  21 }