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

    #[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, 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

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

Performs the `+=` operation.

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## Implementors

### `impl AddAssign<f32> for f32`[src]

#### `fn add_assign(&mut self, other: f32)`[src]

### `impl AddAssign<f64> for f64`[src]

#### `fn add_assign(&mut self, other: f64)`[src]

### `impl AddAssign<i128> for i128`[src]

#### `fn add_assign(&mut self, other: i128)`[src]

### `impl AddAssign<i16> for i16`[src]

#### `fn add_assign(&mut self, other: i16)`[src]

### `impl AddAssign<i32> for i32`[src]

#### `fn add_assign(&mut self, other: i32)`[src]

### `impl AddAssign<i64> for i64`[src]

#### `fn add_assign(&mut self, other: i64)`[src]

### `impl AddAssign<i8> for i8`[src]

#### `fn add_assign(&mut self, other: i8)`[src]

### `impl AddAssign<isize> for isize`[src]

#### `fn add_assign(&mut self, other: isize)`[src]

### `impl AddAssign<u128> for u128`[src]

#### `fn add_assign(&mut self, other: u128)`[src]

### `impl AddAssign<u16> for u16`[src]

#### `fn add_assign(&mut self, other: u16)`[src]

### `impl AddAssign<u32> for u32`[src]

#### `fn add_assign(&mut self, other: u32)`[src]

### `impl AddAssign<u64> for u64`[src]

#### `fn add_assign(&mut self, other: u64)`[src]

### `impl AddAssign<u8> for u8`[src]

#### `fn add_assign(&mut self, other: u8)`[src]

### `impl AddAssign<usize> for usize`[src]

#### `fn add_assign(&mut self, other: usize)`[src]

### `impl AddAssign<Wrapping<i128>> for Wrapping<i128>`[src]

#### `fn add_assign(&mut self, other: Wrapping<i128>)`[src]

### `impl AddAssign<Wrapping<i16>> for Wrapping<i16>`[src]

#### `fn add_assign(&mut self, other: Wrapping<i16>)`[src]

### `impl AddAssign<Wrapping<i32>> for Wrapping<i32>`[src]

#### `fn add_assign(&mut self, other: Wrapping<i32>)`[src]

### `impl AddAssign<Wrapping<i64>> for Wrapping<i64>`[src]

#### `fn add_assign(&mut self, other: Wrapping<i64>)`[src]

### `impl AddAssign<Wrapping<i8>> for Wrapping<i8>`[src]

#### `fn add_assign(&mut self, other: Wrapping<i8>)`[src]

### `impl AddAssign<Wrapping<isize>> for Wrapping<isize>`[src]

#### `fn add_assign(&mut self, other: Wrapping<isize>)`[src]

### `impl AddAssign<Wrapping<u128>> for Wrapping<u128>`[src]

#### `fn add_assign(&mut self, other: Wrapping<u128>)`[src]

### `impl AddAssign<Wrapping<u16>> for Wrapping<u16>`[src]

#### `fn add_assign(&mut self, other: Wrapping<u16>)`[src]

### `impl AddAssign<Wrapping<u32>> for Wrapping<u32>`[src]

#### `fn add_assign(&mut self, other: Wrapping<u32>)`[src]

### `impl AddAssign<Wrapping<u64>> for Wrapping<u64>`[src]

#### `fn add_assign(&mut self, other: Wrapping<u64>)`[src]

### `impl AddAssign<Wrapping<u8>> for Wrapping<u8>`[src]

#### `fn add_assign(&mut self, other: Wrapping<u8>)`[src]

### `impl AddAssign<Wrapping<usize>> for Wrapping<usize>`[src]

#### `fn add_assign(&mut self, other: Wrapping<usize>)`[src]

### `impl AddAssign<Duration> for Duration`[src]

#### `fn add_assign(&mut self, rhs: Duration)`[src]

### `impl AddAssign<Duration> for Instant`[src]

#### `fn add_assign(&mut self, other: Duration)`[src]

### `impl AddAssign<Duration> for SystemTime`[src]

#### `fn add_assign(&mut self, other: Duration)`[src]

### `impl<'_> AddAssign<&'_ f32> for f32`[src]

#### `fn add_assign(&mut self, other: &f32)`[src]

### `impl<'_> AddAssign<&'_ f64> for f64`[src]

#### `fn add_assign(&mut self, other: &f64)`[src]

### `impl<'_> AddAssign<&'_ i128> for i128`[src]

#### `fn add_assign(&mut self, other: &i128)`[src]

### `impl<'_> AddAssign<&'_ i16> for i16`[src]

#### `fn add_assign(&mut self, other: &i16)`[src]

### `impl<'_> AddAssign<&'_ i32> for i32`[src]

#### `fn add_assign(&mut self, other: &i32)`[src]

### `impl<'_> AddAssign<&'_ i64> for i64`[src]

#### `fn add_assign(&mut self, other: &i64)`[src]

### `impl<'_> AddAssign<&'_ i8> for i8`[src]

#### `fn add_assign(&mut self, other: &i8)`[src]

### `impl<'_> AddAssign<&'_ isize> for isize`[src]

#### `fn add_assign(&mut self, other: &isize)`[src]

### `impl<'_> AddAssign<&'_ str> for String`[src]

Implements the `+=` operator for appending to a `String`.

This has the same behavior as the `push_str` method.

#### `fn add_assign(&mut self, other: &str)`[src]

### `impl<'_> AddAssign<&'_ u128> for u128`[src]

#### `fn add_assign(&mut self, other: &u128)`[src]

### `impl<'_> AddAssign<&'_ u16> for u16`[src]

#### `fn add_assign(&mut self, other: &u16)`[src]

### `impl<'_> AddAssign<&'_ u32> for u32`[src]

#### `fn add_assign(&mut self, other: &u32)`[src]

### `impl<'_> AddAssign<&'_ u64> for u64`[src]

#### `fn add_assign(&mut self, other: &u64)`[src]

### `impl<'_> AddAssign<&'_ u8> for u8`[src]

#### `fn add_assign(&mut self, other: &u8)`[src]

### `impl<'_> AddAssign<&'_ usize> for usize`[src]

#### `fn add_assign(&mut self, other: &usize)`[src]

### `impl<'_> AddAssign<&'_ Wrapping<i128>> for Wrapping<i128>`[src]

#### `fn add_assign(&mut self, other: &Wrapping<i128>)`[src]

### `impl<'_> AddAssign<&'_ Wrapping<i16>> for Wrapping<i16>`[src]

#### `fn add_assign(&mut self, other: &Wrapping<i16>)`[src]

### `impl<'_> AddAssign<&'_ Wrapping<i32>> for Wrapping<i32>`[src]

#### `fn add_assign(&mut self, other: &Wrapping<i32>)`[src]

### `impl<'_> AddAssign<&'_ Wrapping<i64>> for Wrapping<i64>`[src]

#### `fn add_assign(&mut self, other: &Wrapping<i64>)`[src]

### `impl<'_> AddAssign<&'_ Wrapping<i8>> for Wrapping<i8>`[src]

#### `fn add_assign(&mut self, other: &Wrapping<i8>)`[src]

### `impl<'_> AddAssign<&'_ Wrapping<isize>> for Wrapping<isize>`[src]

#### `fn add_assign(&mut self, other: &Wrapping<isize>)`[src]

### `impl<'_> AddAssign<&'_ Wrapping<u128>> for Wrapping<u128>`[src]

#### `fn add_assign(&mut self, other: &Wrapping<u128>)`[src]

### `impl<'_> AddAssign<&'_ Wrapping<u16>> for Wrapping<u16>`[src]

#### `fn add_assign(&mut self, other: &Wrapping<u16>)`[src]

### `impl<'_> AddAssign<&'_ Wrapping<u32>> for Wrapping<u32>`[src]

#### `fn add_assign(&mut self, other: &Wrapping<u32>)`[src]

### `impl<'_> AddAssign<&'_ Wrapping<u64>> for Wrapping<u64>`[src]

#### `fn add_assign(&mut self, other: &Wrapping<u64>)`[src]

### `impl<'_> AddAssign<&'_ Wrapping<u8>> for Wrapping<u8>`[src]

#### `fn add_assign(&mut self, other: &Wrapping<u8>)`[src]

### `impl<'_> AddAssign<&'_ Wrapping<usize>> for Wrapping<usize>`[src]

#### `fn add_assign(&mut self, other: &Wrapping<usize>)`[src]

### `impl<'a> AddAssign<&'a str> for Cow<'a, str>`[src]

#### `fn add_assign(&mut self, rhs: &'a str)`[src]

### `impl<'a> AddAssign<Cow<'a, str>> for Cow<'a, str>`[src]

#### `fn add_assign(&mut self, rhs: Cow<'a, str>)`[src]

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