Macro new_coord 

macro_rules! new_coord {
    () => { ... };
    ($y:expr) => { ... };
    ($x:expr, $y:expr) => { ... };
}

creating a new Coord

Example

use coord2d::*;

let a: coord::Coord = new_coord!(1, 2.0);
println!("{:?}", a);
// returns Coord {x: 1.0, y: 2.0}
let a: coord::Coord = new_coord!(2.0);
println!("{:?}", a);
// returns Coord {x: 0.0, y: 2.0}

• the var a contains to var x and y as position in a graph (O, I, J)
• returns i32