| // build-pass | |
| pub trait Foo<'a> { | |
| type Bar; | |
| fn foo(&'a self) -> Self::Bar; | |
| } | |
| impl<'a, 'b, T: 'a> Foo<'a> for &'b T { | |
| type Bar = &'a T; | |
| fn foo(&'a self) -> &'a T { | |
| self | |
| } | |
| } | |
| pub fn uncallable<T, F>(x: T, f: F) | |
| where T: for<'a> Foo<'a>, | |
| F: for<'a> Fn(<T as Foo<'a>>::Bar) | |
| { | |
| f(x.foo()); | |
| } | |
| pub fn catalyst(x: &i32) { | |
| broken(x, |_| {}) | |
| } | |
| pub fn broken<F: Fn(&i32)>(x: &i32, f: F) { | |
| uncallable(x, |y| f(y)); | |
| } | |
| fn main() { } |