catfishing

#[catfishing(Robot)]
struct Human {
    age: usize,
    name: &'static str,
}

struct Robot(Human);

fn main() {
    let human = Human { age: 42, name: "John" };
    let robot = Robot(human);
    assert_eq!(robot.age(), 42);
    assert_eq!(robot.name(), "John");
}