# Trait bitflags::__core::ops::SubAssign [−] [src]

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

The `SubAssign` trait is used to specify the functionality of `-=`.

# Examples

A trivial implementation of `SubAssign`. When `Foo -= Foo` happens, it ends up calling `sub_assign`, and therefore, `main` prints `Subtracting!`.

    use std::ops::SubAssign;

    struct Foo;

    impl SubAssign for Foo {
        fn sub_assign(&mut self, _rhs: Foo) {
            println!("Subtracting!");
        }
    }

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

## Required Methods

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

The method for the `-=` operator

## Implementors

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

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