use functor_derive::Functor;

#[derive(Functor)]
struct MyType<T> {
    value: T,
    list: Vec<T>,
    unaffected: bool,
}

fn main() {
    let original = MyType {
        value: 42,
        list: vec![1, 3],
        unaffected: false,
    };
    let transformed = original.fmap(|x| (x, x * 2));

    assert_eq!(transformed.value, (42, 84));
    assert_eq!(transformed.list, vec![(1, 2), (3, 6)]);
}