#[derive(Debug)]
struct PP {
    a: u16
}

#[derive(Debug)]
enum AnnotationType {
    A(PP),
    B { b: u32, c: u64 }
}


fn main() {
    println!("Hello, world!");
    let mut pp = PP { a: 123};
    let mut x: AnnotationType = AnnotationType::A(pp);
    test(&mut x);
    println!("{:?}", x);

    x = AnnotationType::B { b: 13, c: 15 };
    test(&mut x);
    println!("{:?}", x);
}

fn test(f: &mut AnnotationType) {
    match f {
        AnnotationType::A(ref mut pp) => { pp.a = 5 },
        AnnotationType::B { ref mut b, ref mut c } => { *b = 132; *c = 151 },
    };
}