extern crate num;

#[derive(Debug)]
struct Vector2<S: num::Num>{
    x: S,
    y: S,
}

#[derive(Debug)]
struct Vector2f64 {
    x: f64,
    y: f64,
}

fn main() {
    let v2 = Vector2 {x: 1.0, y: 2.0 };
    println!("Hello, world! {:?}", v2);

    let v2f64 = Vector2f64 {x: 3.0, y: 4.0};
    println!("Hello, float64 world! {:?}", v2f64);
}