31 lines
479 B
Rust
31 lines
479 B
Rust
// 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() { }
|
|
|