class.atlas

//everything in this file is purely theoretical and does not work in the current version of the compiler

public trait Shape {
    func getArea(&self) -> i64;
}


public class Rectangle : Shape {
    private:
        width: i64;
        height: i64;
    public:
        func new(width: i64, height: i64) -> Rectangle {
            return Rectangle {
                width: width,
                height: height
            }
        }
        func setWidth(&self, w: i64) {
            self.width = w;
        }
        func setHeight(&self, h: i64) {
            self.height = h;
        }
        func getWidth(&self) -> i64 {
            return self.width;
        }
        func getHeight(&self) -> i64 {
            return self.height;
        }
        #[override(Shape::getArea)] //Why? Because you can implement multiple traits, and the compiler needs to know which one you are implementing
        func getArea(&self) -> i64 {
            return self.width * self.height;
        }
}

func main() -> i64 {
    let r = Rectangle::new(10, 20);
    r.setWidth(30);
    r.setHeight(40);
    return r.getArea();
}