gen.rs

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

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

struct Triangle {
    points: [Point; 3]
}

struct Square {
    points: [Point; 4]
}

trait Shape {
    fn draw(&self);
}

impl Shape for Circle {
    fn draw(&self){
        _ = self.center;
        _ = self.radius;
    }
}

impl Shape for Triangle {
    fn draw(&self){
        _ = self.points[2].x;
        _ = self.points[2].y;
    }
}

impl Shape for Square {
    fn draw(&self){
        _ = self.points[3].x;
        _ = self.points[3].y;
    }
}

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

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