#![allow(dead_code, deprecated, unused_variables, unused_mut)]
use std::ops::Sub;
#[derive(Debug, PartialEq)]
struct Point<T> {
    x: T,
    y: T,
}
impl<T: Sub<Output = T>> Sub for Point<T> {
    type Output = Self;
    fn sub(self, other: Self) -> Self::Output {
        Point {
            x: self.x - other.x,
            y: self.y - other.y,
        }
    }
}
fn main() {
    assert_eq!(Point { x : 2, y : 3 } - Point { x : 1, y : 0 }, Point { x : 1, y : 3 });
}