#[macro_export]
macro_rules! point {
- ( $x:expr, $y:expr ) => { Point2D { x:$x, y:$y } };
+ ( $x:expr, $y:expr ) => {
+ Point2D { x: $x, y: $y }
+ };
}
#[derive(Debug, Copy, Clone, PartialEq)]
}
}
-impl<T: Add<Output=T>> Add for Point2D<T> {
+impl<T: Add<Output = T>> Add for Point2D<T> {
type Output = Point2D<T>;
fn add(self, rhs: Point2D<T>) -> Self::Output {
- Point2D { x: self.x + rhs.x, y: self.y + rhs.y }
+ Point2D {
+ x: self.x + rhs.x,
+ y: self.y + rhs.y,
+ }
}
}
pub height: T,
}
-impl<T: Mul<Output=T> + Copy> Rect<T> {
+impl<T: Mul<Output = T> + Copy> Rect<T> {
#[allow(dead_code)]
pub fn area(&self) -> T {
- self.width * self.height
+ self.width * self.height
}
}
impl<T> From<(T, T)> for Rect<T> {
fn from(item: (T, T)) -> Self {
- Rect { width: item.0, height: item.1 }
+ Rect {
+ width: item.0,
+ height: item.1,
+ }
}
}
#[test]
fn area_for_rect_of_multipliable_type() {
let r: Rect<_> = (30, 20).into(); // the Into trait uses the From trait
- assert_eq!(r.area(), 30 * 20);
+ assert_eq!(r.area(), 30 * 20);
// let a = Rect::from(("a".to_string(), "b".to_string())).area(); // this doesn't work, because area() is not implemented for String
}
}