#[derive(Debug, Clone)]
struct Point {
    x: i32,
    y: i32
}

impl std::ops::Add<Point> for Point {
    type Output = Point;

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

impl std::ops::Add<Box<Point>> for Point {
    type Output = Point;

    fn add( self, other: Box<Point> ) -> Point {
        self + *other
    }
}

impl std::ops::Add<Point> for Box<Point> {
    type Output = Point;

    fn add( self, other: Point ) -> Point {
        *self + other
    }
}

impl std::ops::Add<Box<Point>> for Box<Point> {
    type Output = Point;

    fn add( self, other: Box<Point> ) -> Point {
        *self + *other
    }
}

fn main() {
    let first_point: Point = Point { x: 1, y: 2 };
    let second_point: Box<Point> = Box::new( Point { x: 1, y: 1 } );
    let third_point: Box<Point> = second_point.clone();
    let fourth_point: Point = first_point + (second_point + third_point);

    println!( "{:?}", fourth_point );
}