use std::ops::*;
use std::fmt::Debug;


#[derive(Eq, PartialEq, Debug, Copy, Clone)]
struct Point {
    x: u32,
    y: u32,
}

impl Add for Point {
    type Output = Point;

    fn add(self, other: Point) -> Self {
        Point {
            x: self.x + other.x,
            y: self.y + other.y,
        }
    }
}

fn addable<A: Add + Debug>(a: A, b: A) -> A::Output {
  println!("{:?} + {:?} = {:?}", a, b, a + b);
  a + b
}


fn main() {
    let p1: Point = Point { x: 1, y: 1 };
    let p2: Point = Point { x: 2, y: 2 };

    assert!((p1 + p2) == Point { x: 3, y: 3 });

    assert!(addable(p1, p2) == Point { x: 3, y: 3 });
}