borrow-checker-error.rs

#![allow(dead_code)]
#![allow(unused_variables)]

#[derive(Debug)]
struct Point {
    x: f32,
    y: f32,
}

#[derive(Debug)]
struct Rectangle {
    top_left: Point,
    bottom_right: Point,
}

fn main() {
    let point: Point = Point { x: 10.3, y: 0.4 };

    let Point { x, y } = point;


    println!("point coordinates: ({}, {})", point.x, point.y);

    let bottom_right = Point { x: 5.2, ..point };

    println!("second point: ({}, {})", bottom_right.x, bottom_right.y);

    let Point { x: top_edge, y: left_edge } = point;

    let rectangle = Rectangle {
        top_left: Point { x: left_edge, y: top_edge },
        bottom_right: bottom_right,
    };

    println!("Rectangle {:?} with area {:?}", rectangle, rect_area(rectangle));
}

fn rect_area(rect: Rectangle) -> f32 {
    let Rectangle {
        top_left: Point {
            x,
            y: ytl
        },
        bottom_right: Point {
            x: xbr,
            y: ybr
        }
    } = rect;

    return (xbr - x) * (ytl - ybr)
}