blob: f6d1b7073a2b3d8237d5b2442c4da5cec9176fd6 (
plain)
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
|
// compile-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() { }
|
