#[derive(Debug)]
enum AnnotationType {
    A { a: u16 },
    B { b: u32, c: u64 }
}


fn main() {
    println!("Hello, world!");
    let mut x: AnnotationType = AnnotationType::A { a: 12 };
    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 { mut a } => { a = 5 },
        AnnotationType::B { mut b, mut c } => { b = 13; c = 15 },
    };
}