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

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

The `AddAssign` trait is used to specify the functionality of `+=`.

# Examples

A trivial implementation of `AddAssign`. When `Foo += Foo` happens, it ends up calling `add_assign`, and therefore, `main` prints `Adding!`.

use std::ops::AddAssign; struct Foo; impl AddAssign for Foo { fn add_assign(&mut self, _rhs: Foo) { println!("Adding!"); } } #[allow(unused_assignments)] fn main() { let mut foo = Foo; foo += Foo; }

    use std::ops::AddAssign;

    struct Foo;

    impl AddAssign for Foo {
        fn add_assign(&mut self, _rhs: Foo) {
            println!("Adding!");
        }
    }

    fn main() {
        let mut foo = Foo;
        foo += Foo;
    }

## Required Methods

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

The method for the `+=` operator

## Implementors

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

# Help

## Keyboard Shortcuts

?
  Show this help dialog
S
  Focus the search field
⇤
  Move up in search results
⇥
  Move down in search results
⏎
  Go to active search result
+
  Collapse/expand all sections

## Search Tricks

Prefix searches with a type followed by a colon (e.g. `fn:`) to restrict the search to a given type.

Accepted types are: `fn`, `mod`, `struct`, `enum`, `trait`, `type`, `macro`, and `const`.

Search functions by type signature (e.g. `vec -> usize` or `* -> vec`)