src/test/ui/higher-rank-trait-bounds/normalize-under-binder/issue-44005.rs

   1 // check-pass
   2
   3 pub trait Foo<'a> {
   4     type Bar;
   5     fn foo(&'a self) -> Self::Bar;
   6 }
   7
   8 impl<'a, 'b, T: 'a> Foo<'a> for &'b T {
   9     type Bar = &'a T;
  10     fn foo(&'a self) -> &'a T {
  11         self
  12     }
  13 }
  14
  15 pub fn uncallable<T, F>(x: T, f: F)
  16 where
  17     T: for<'a> Foo<'a>,
  18     F: for<'a> Fn(<T as Foo<'a>>::Bar),
  19 {
  20     f(x.foo());
  21 }
  22
  23 pub fn catalyst(x: &i32) {
  24     broken(x, |_| {})
  25 }
  26
  27 pub fn broken<F: Fn(&i32)>(x: &i32, f: F) {
  28     uncallable(x, |y| f(y));
  29 }
  30
  31 fn main() {}