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


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31

// check-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() {}