1 use std::ops::{Add, AddAssign, Sub, SubAssign, Mul, MulAssign, Div, DivAssign, Neg};
3 pub type Nanoseconds = u64;
7 ( $x:expr, $y:expr ) => {
8 Point2D { x: $x, y: $y }
12 #[derive(Debug, Default, Copy, Clone, PartialEq)]
13 pub struct Point2D<T> {
19 pub fn length(self) -> f64 {
20 ((self.x * self.x) + (self.y * self.y)).sqrt()
24 ////////// add point to point //////////////////////////////////////////////////
25 impl<T: Add<Output = T>> Add for Point2D<T> {
28 fn add(self, rhs: Self) -> Self {
36 impl<T: Add<Output = T> + Copy> AddAssign for Point2D<T> {
37 fn add_assign(&mut self, rhs: Self) {
45 ////////// add tuple to point //////////////////////////////////////////////////
46 impl<T: Add<Output = T>> Add<(T, T)> for Point2D<T> {
49 fn add(self, rhs: (T, T)) -> Self {
57 ////////// subtract point from point ///////////////////////////////////////////
58 impl<T: Sub<Output = T>> Sub for Point2D<T> {
61 fn sub(self, rhs: Self) -> Self {
69 impl<T: Sub<Output = T> + Copy> SubAssign for Point2D<T> {
70 fn sub_assign(&mut self, rhs: Self) {
78 ////////// multiply point with scalar //////////////////////////////////////////
79 impl<T: Mul<Output = T> + Copy> Mul<T> for Point2D<T> {
82 fn mul(self, rhs: T) -> Self {
90 impl<T: Mul<Output = T> + Copy> MulAssign<T> for Point2D<T> {
91 fn mul_assign(&mut self, rhs: T) {
99 ////////// multiply components of two points ///////////////////////////////////
100 impl<T: Mul<Output = T>> Mul for Point2D<T> {
103 fn mul(self, rhs: Self) -> Self {
111 impl<T: Mul<Output = T> + Copy> MulAssign for Point2D<T> {
112 fn mul_assign(&mut self, rhs: Self) {
120 ////////// divide point with scalar ////////////////////////////////////////////
121 impl<T: Div<Output = T> + Copy> Div<T> for Point2D<T> {
124 fn div(self, rhs: T) -> Self {
132 impl<T: Div<Output = T> + Copy> DivAssign<T> for Point2D<T> {
133 fn div_assign(&mut self, rhs: T) {
141 ////////// divide components of two points /////////////////////////////////////
142 impl<T: Div<Output = T>> Div for Point2D<T> {
145 fn div(self, rhs: Self) -> Self {
153 impl<T: Div<Output = T> + Copy> DivAssign for Point2D<T> {
154 fn div_assign(&mut self, rhs: Self) {
162 impl<T: Neg<Output = T>> Neg for Point2D<T> {
165 fn neg(self) -> Self {
173 impl<T> From<(T, T)> for Point2D<T> {
174 fn from(item: (T, T)) -> Self {
184 ( $x:expr, $y:expr ) => {
185 Rect { x: $x, y: $y }
195 impl<T: Mul<Output = T> + Copy> Rect<T> {
197 pub fn area(&self) -> T {
198 self.width * self.height
202 impl<T> From<(T, T)> for Rect<T> {
203 fn from(item: (T, T)) -> Self {
216 fn immutable_copy_of_point() {
217 let a = point!(0, 0);
218 let mut b = a; // Copy
219 assert_eq!(a, b); // PartialEq
221 assert_ne!(a, b); // PartialEq
226 let mut a = point!(1, 0);
227 assert_eq!(a + point!(2, 2), point!(3, 2)); // Add
228 a += point!(2, 2); // AddAssign
229 assert_eq!(a, point!(3, 2));
230 assert_eq!(point!(1, 0) + (2, 3), point!(3, 3));
235 let mut a = point!(1, 0);
236 assert_eq!(a - point!(2, 2), point!(-1, -2));
238 assert_eq!(a, point!(-1, -2));
243 let mut a = point!(1, 2);
244 assert_eq!(a * 2, point!(2, 4));
245 assert_eq!(a * point!(2, 3), point!(2, 6));
247 assert_eq!(a, point!(2, 4));
249 assert_eq!(a, point!(6, 4));
254 let mut a = point!(4, 8);
255 assert_eq!(a / 2, point!(2, 4));
256 assert_eq!(a / point!(2, 4), point!(2, 2));
258 assert_eq!(a, point!(2, 4));
260 assert_eq!(a, point!(1, 1));
265 assert_eq!(point!(1, 1), -point!(-1, -1));
269 fn area_for_rect_of_multipliable_type() {
270 let r: Rect<_> = (30, 20).into(); // the Into trait uses the From trait
271 assert_eq!(r.area(), 30 * 20);
272 // let a = Rect::from(("a".to_string(), "b".to_string())).area(); // this doesn't work, because area() is not implemented for String