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

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

The subtraction assignment operator `-=`.

# Examples

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

    use std::ops::SubAssign;

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

    impl SubAssign for Point {
        fn sub_assign(&mut self, other: Self) {
            *self = Self {
                x: self.x - other.x,
                y: self.y - other.y,
            };
        }
    }

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

Run

## Required methods

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

Performs the `-=` operation.

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## Implementors

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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