1.8.0[−][src]Trait std::ops::SubAssign
The subtraction assignment operator -=
.
Examples
This example creates a Point
struct that implements the SubAssign
trait, and then demonstrates sub-assigning to a mutable Point
.
use std::ops::SubAssign; #[derive(Debug, PartialEq)] struct Point { x: i32, y: i32, } impl SubAssign for Point { fn sub_assign(&mut self, other: Self) { *self = Self { x: self.x - other.x, y: self.y - other.y, }; } } let mut point = Point { x: 3, y: 3 }; point -= Point { x: 2, y: 3 }; assert_eq!(point, Point {x: 1, y: 0});Run
Required methods
fn sub_assign(&mut self, rhs: Rhs)
Performs the -=
operation.