nogen.rs

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

struct Circle {
    center: Point,
    radius: f64,
}

enum Shape {
    Circle(Circle),
    Triangle([Point; 3]),
    Square([Point; 4]),
}

fn draw_circle(c: Circle) {
    _ = c.center;
    _ = c.radius;
    todo!();
}

fn draw_polygon(p: &[Point]) {
    _ = p[0].x;
    _ = p[0].y;
    todo!();
}

fn draw(s: Shape) {
    match s {
        Shape::Circle(c) => draw_circle(c),
        Shape::Triangle(points) => draw_polygon(&points),
        Shape::Square(points) => draw_polygon(&points),
    }
}

fn main() {
    let circ = Shape::Circle (
        Circle {
            center: Point { x: 0, y: 0 },
            radius: 1.0,
        }
    );
    let tri = Shape::Triangle (
        [
            Point { x: 0, y: 0 },
            Point { x: 0, y: 0 },
            Point { x: 0, y: 0 },
        ]
    );
    let sq = Shape::Square (
        [
            Point { x: 0, y: 0 },
            Point { x: 0, y: 0 },
            Point { x: 0, y: 0 },
            Point { x: 0, y: 0 },
        ]
    );
    
    draw(circ);
    draw(tri);
    draw(sq);

    println!("Hello, world!");
}