src/test/ui/issues/issue-44005.rs

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