//! returns: 99

record Pair: Copy {
    x: u32,
    y: u32,
}

fn pick(flag: bool) -> ?Pair {
    if flag {
        return Pair { x: 10, y: 89 };
    }
    return nil;
}

fn nest(outer: bool, inner: bool) -> ??Pair {
    if outer {
        let value = pick(inner);
        return value;
    }
    return nil;
}

@default fn main() -> u32 {
    if let outer = nest(true, true) {
        if let pair = outer; pair.x == 10 and pair.y == 89 {
            if let outerSomeNil = nest(true, false) {
                if let innerNil = outerSomeNil {
                    return 11;
                }
            } else {
                return 12;
            }
            if let unreachable = nest(false, true) {
                return 13;
            }
            return 99;
        }
    }
    return 1;
}