src/test/ui/type-alias-impl-trait/generic_duplicate_param_use3.rs

   1 #![feature(type_alias_impl_trait)]
   2
   3 use std::fmt::Debug;
   4
   5 fn main() {}
   6
   7 // test that unused generic parameters are ok
   8 type Two<T, U> = impl Debug;
   9
  10 fn one<T: Debug>(t: T) -> Two<T, T> {
  11     //~^ ERROR non-defining opaque type use in defining scope
  12     t
  13 }
  14
  15 fn two<T: Debug, U>(t: T, _: U) -> Two<T, U> {
  16     t
  17 }
  18
  19 fn three<T, U: Debug>(_: T, u: U) -> Two<T, U> {
  20     u
  21 }