Trait core::ops::AddAssign1.8.0[−][src]

pub trait AddAssign<Rhs = Self> {
    fn add_assign(&mut self, rhs: Rhs);
}
Expand description

加法赋值运算符 +=。

Examples

本示例创建一个 Point 结构体，该结构体实现 AddAssign trait，然后演示对可变 Point 的添加分配。

use std::ops::AddAssign;

#[derive(Debug, Copy, Clone, PartialEq)]
struct Point {
    x: i32,
    y: i32,
}

impl AddAssign for Point {
    fn add_assign(&mut self, other: Self) {
        *self = Self {
            x: self.x + other.x,
            y: self.y + other.y,
        };
    }
}

let mut point = Point { x: 1, y: 0 };
point += Point { x: 2, y: 3 };
assert_eq!(point, Point { x: 3, y: 3 });
Run

Required methods

执行 += 操作。

Example

let mut x: u32 = 12;
x += 1;
assert_eq!(x, 13);
Run

Implementors