module NamedParams {
    const Point(Int x, Int y) {
        Point with(Int? x=Null, Int? y=Null) {
            return new Point(x ?: this.x, y ?: this.y);
        }
    }

    @Inject Console console;

    void run() {
        Point origin = new Point(0, 0);
        console.print($"origin={origin}");
        Point moveRight = origin.with(x=5);
        console.print($"moveRight(x=5)={moveRight}");
        Point moveUp = moveRight.with(y=3);
        console.print($"moveUp(y=3)={moveUp}");
    }
}