src/test/ui/impl-trait/issues/issue-57979-impl-trait-in-path.rs

   1 // rust-lang/rust#57979 : the initial support for `impl Trait` didn't
   2 // properly check syntax hidden behind an associated type projection.
   3 // Here we test behavior of occurrences of `impl Trait` within a path
   4 // component in that context.
   5
   6 pub trait Bar { }
   7 pub trait Quux<T> { type Assoc; }
   8 pub fn demo(_: impl Quux<(), Assoc=<() as Quux<impl Bar>>::Assoc>) { }
   9 //~^ ERROR `impl Trait` is not allowed in path parameters
  10 impl<T> Quux<T> for () { type Assoc = u32; }
  11
  12 fn main() { }