rustlings/exercises/options/options3.rs

// options3.rs
// Execute `rustlings hint options3` or use the `hint` watch subcommand for a hint.

struct Point {
    x: i32,
    y: i32,
}

fn main() {
    let y: Option<Point> = Some(Point { x: 100, y: 200 });

    match y {
        // ref annotates pattern bindings to make them borrow rather than move.
        // It is not a part of the pattern as far as matching is concerned:
        // it does not affect whether a value is matched, only how it is matched.
        Some(ref p) => println!("Co-ordinates are {},{} ", p.x, p.y),
        _ => panic!("no match!"),
    }
    y; // Fix without deleting this line.
}