Rust Default

default.rs

#[derive(Debug)]
struct Point {
    x: f32,
    y: f32,
}
impl Point {
    fn new() -> Self {
        Point { x: 30.0, y: 5.0 }
        // Default::default() // This also works
    }
}
impl Default for Point {
    fn default() -> Self {
        Point {
            x: 5.0,
            y: Default::default(),
        }
    }
}

fn main() {
    let p = Point { x: 10.0, y: 20.0 };
    let p2 = Point::new();
    let p3: Point = Default::default();
    println!("p = {:?}", p);
    println!("p2 = {:?}", p2);
    println!("p4 = {:?}", p3);
}