# Trait core::ops::AddAssign 1.8.0 [−] [src]

    #[lang = "add_assign"]
    pub trait AddAssign<Rhs = Self> {
        fn add_assign(&mut self, rhs: Rhs);
    }

The addition assignment operator `+=`.

# Examples

This example creates a `Point` struct that implements the `AddAssign` trait, and then demonstrates add-assigning to a mutable `Point`.

    use std::ops::AddAssign;

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

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

    impl PartialEq for Point {
        fn eq(&self, other: &Self) -> bool {
            self.x == other.x && 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

### `fn add_assign(&mut self, rhs: Rhs)`

The method for the `+=` operator

## Implementors

- `impl AddAssign for Wrapping<usize>`
- `impl AddAssign for Wrapping<u8>`
- `impl AddAssign for Wrapping<u16>`
- `impl AddAssign for Wrapping<u32>`
- `impl AddAssign for Wrapping<u64>`
- `impl AddAssign for Wrapping<u128>`
- `impl AddAssign for Wrapping<isize>`
- `impl AddAssign for Wrapping<i8>`
- `impl AddAssign for Wrapping<i16>`
- `impl AddAssign for Wrapping<i32>`
- `impl AddAssign for Wrapping<i64>`
- `impl AddAssign for Wrapping<i128>`
- `impl AddAssign for usize`
- `impl AddAssign for u8`
- `impl AddAssign for u16`
- `impl AddAssign for u32`
- `impl AddAssign for u64`
- `impl AddAssign for u128`
- `impl AddAssign for isize`
- `impl AddAssign for i8`
- `impl AddAssign for i16`
- `impl AddAssign for i32`
- `impl AddAssign for i64`
- `impl AddAssign for i128`
- `impl AddAssign for f32`
- `impl AddAssign for f64`

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