gistfile1.rs

enum Bar {
    Z(int),
    S(~Bar)
}

fn foo<'a>(x: &'a mut Bar) -> &'a int {
    match x {
        &Z(_) => {
            fail!()
        },
        &S(~ref mut z) => {
            let r = foo(z);
            let x = &mut *z;
            r
        },
    }
}

fn main() {
}