associated-types-in-fn.rs

//@ run-pass

trait Get {
    type Value;
    fn get(&self) -> &<Self as Get>::Value;
}

struct Struct {
    x: isize,
}

impl Get for Struct {
    type Value = isize;
    fn get(&self) -> &isize {
        &self.x
    }
}

fn grab<T:Get>(x: &T) -> &<T as Get>::Value {
    x.get()
}

fn main() {
    let s = Struct {
        x: 100,
    };
    assert_eq!(*grab(&s), 100);
}