# 1.8.0[−][src]Trait core::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: Point) {
            *self = Point {
                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.

## Implementors

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`impl SubAssign for Wrapping<i8>`

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`fn sub_assign(&mut self, other: Wrapping<i8>)`

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`impl SubAssign for Wrapping<i16>`

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`fn sub_assign(&mut self, other: Wrapping<i16>)`

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`impl SubAssign for Wrapping<i32>`

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`fn sub_assign(&mut self, other: Wrapping<i32>)`

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`impl SubAssign for Wrapping<i64>`

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`fn sub_assign(&mut self, other: Wrapping<i64>)`

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`impl SubAssign for Wrapping<i128>`

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`fn sub_assign(&mut self, other: Wrapping<i128>)`

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`impl SubAssign for Wrapping<isize>`

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`fn sub_assign(&mut self, other: Wrapping<isize>)`

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`impl SubAssign for Wrapping<u8>`

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`fn sub_assign(&mut self, other: Wrapping<u8>)`

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`impl SubAssign for Wrapping<u16>`

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`fn sub_assign(&mut self, other: Wrapping<u16>)`

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`impl SubAssign for Wrapping<u32>`

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`fn sub_assign(&mut self, other: Wrapping<u32>)`

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`impl SubAssign for Wrapping<u64>`

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`fn sub_assign(&mut self, other: Wrapping<u64>)`

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`impl SubAssign for Wrapping<u128>`

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`fn sub_assign(&mut self, other: Wrapping<u128>)`

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`impl SubAssign for Wrapping<usize>`

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`fn sub_assign(&mut self, other: Wrapping<usize>)`

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`impl SubAssign for Duration`

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`fn sub_assign(&mut self, rhs: Duration)`

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`impl SubAssign for f32`

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`fn sub_assign(&mut self, other: f32)`

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`impl SubAssign for f64`

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`fn sub_assign(&mut self, other: f64)`

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`impl SubAssign for i8`

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`fn sub_assign(&mut self, other: i8)`

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`impl SubAssign for i16`

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`fn sub_assign(&mut self, other: i16)`

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`impl SubAssign for i32`

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`fn sub_assign(&mut self, other: i32)`

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`impl SubAssign for i64`

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`fn sub_assign(&mut self, other: i64)`

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`impl SubAssign for i128`

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`fn sub_assign(&mut self, other: i128)`

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`impl SubAssign for isize`

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`fn sub_assign(&mut self, other: isize)`

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`impl SubAssign for u8`

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`fn sub_assign(&mut self, other: u8)`

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`impl SubAssign for u16`

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`fn sub_assign(&mut self, other: u16)`

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`impl SubAssign for u32`

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`fn sub_assign(&mut self, other: u32)`

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`impl SubAssign for u64`

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`fn sub_assign(&mut self, other: u64)`

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`impl SubAssign for u128`

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`fn sub_assign(&mut self, other: u128)`

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`impl SubAssign for usize`

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`fn sub_assign(&mut self, other: usize)`

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`impl<'a> SubAssign<&'a Wrapping<i128>> for Wrapping<i128>`

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`fn sub_assign(&mut self, other: &'a Wrapping<i128>)`

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`impl<'a> SubAssign<&'a Wrapping<i16>> for Wrapping<i16>`

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`fn sub_assign(&mut self, other: &'a Wrapping<i16>)`

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`impl<'a> SubAssign<&'a Wrapping<i32>> for Wrapping<i32>`

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`fn sub_assign(&mut self, other: &'a Wrapping<i32>)`

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`impl<'a> SubAssign<&'a Wrapping<i64>> for Wrapping<i64>`

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`fn sub_assign(&mut self, other: &'a Wrapping<i64>)`

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`impl<'a> SubAssign<&'a Wrapping<i8>> for Wrapping<i8>`

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`fn sub_assign(&mut self, other: &'a Wrapping<i8>)`

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`impl<'a> SubAssign<&'a Wrapping<isize>> for Wrapping<isize>`

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`fn sub_assign(&mut self, other: &'a Wrapping<isize>)`

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`impl<'a> SubAssign<&'a Wrapping<u128>> for Wrapping<u128>`

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`fn sub_assign(&mut self, other: &'a Wrapping<u128>)`

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`impl<'a> SubAssign<&'a Wrapping<u16>> for Wrapping<u16>`

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`fn sub_assign(&mut self, other: &'a Wrapping<u16>)`

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`impl<'a> SubAssign<&'a Wrapping<u32>> for Wrapping<u32>`

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`fn sub_assign(&mut self, other: &'a Wrapping<u32>)`

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`impl<'a> SubAssign<&'a Wrapping<u64>> for Wrapping<u64>`

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`fn sub_assign(&mut self, other: &'a Wrapping<u64>)`

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`impl<'a> SubAssign<&'a Wrapping<u8>> for Wrapping<u8>`

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`fn sub_assign(&mut self, other: &'a Wrapping<u8>)`

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`impl<'a> SubAssign<&'a Wrapping<usize>> for Wrapping<usize>`

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`fn sub_assign(&mut self, other: &'a Wrapping<usize>)`

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`impl<'a> SubAssign<&'a f32> for f32`

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`fn sub_assign(&mut self, other: &'a f32)`

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`impl<'a> SubAssign<&'a f64> for f64`

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`fn sub_assign(&mut self, other: &'a f64)`

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`impl<'a> SubAssign<&'a i128> for i128`

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`fn sub_assign(&mut self, other: &'a i128)`

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`impl<'a> SubAssign<&'a i16> for i16`

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`fn sub_assign(&mut self, other: &'a i16)`

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`impl<'a> SubAssign<&'a i32> for i32`

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`fn sub_assign(&mut self, other: &'a i32)`

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`impl<'a> SubAssign<&'a i64> for i64`

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`fn sub_assign(&mut self, other: &'a i64)`

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`impl<'a> SubAssign<&'a i8> for i8`

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`fn sub_assign(&mut self, other: &'a i8)`

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`impl<'a> SubAssign<&'a isize> for isize`

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`fn sub_assign(&mut self, other: &'a isize)`

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`impl<'a> SubAssign<&'a u128> for u128`

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`fn sub_assign(&mut self, other: &'a u128)`

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`impl<'a> SubAssign<&'a u16> for u16`

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`fn sub_assign(&mut self, other: &'a u16)`

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`impl<'a> SubAssign<&'a u32> for u32`

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`fn sub_assign(&mut self, other: &'a u32)`

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`impl<'a> SubAssign<&'a u64> for u64`

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`fn sub_assign(&mut self, other: &'a u64)`

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`impl<'a> SubAssign<&'a u8> for u8`

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`fn sub_assign(&mut self, other: &'a u8)`

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`impl<'a> SubAssign<&'a usize> for usize`

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`fn sub_assign(&mut self, other: &'a usize)`

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