Trait SubAssign

pub trait SubAssign<Rhs = Self> {
    // Required method
    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, Copy, Clone, 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});

Required Methods

fn sub_assign(&mut self, rhs: Rhs)

Performs the -= operation.

Example

let mut x: u32 = 12;
x -= 1;
assert_eq!(x, 11);

Implementors

impl SubAssign for f16

impl SubAssign for f32

impl SubAssign for f64

impl SubAssign for f128

impl SubAssign for i8

impl SubAssign for i16

impl SubAssign for i32

impl SubAssign for i64

impl SubAssign for i128

impl SubAssign for isize

impl SubAssign for u8

impl SubAssign for u16

impl SubAssign for u32

impl SubAssign for u64

impl SubAssign for u128

impl SubAssign for usize

impl SubAssign for ShutdownState

impl SubAssign for SslMode

impl SubAssign for SslOptions

impl SubAssign for SslSessionCacheMode

impl SubAssign for SslVerifyMode

impl SubAssign for X509CheckFlags

impl SubAssign for X509VerifyFlags

impl SubAssign for BigInt

impl SubAssign for BigUint

impl SubAssign for Saturating<i8>

impl SubAssign for Saturating<i16>

impl SubAssign for Saturating<i32>

impl SubAssign for Saturating<i64>

impl SubAssign for Saturating<i128>

impl SubAssign for Saturating<isize>

impl SubAssign for Saturating<u8>

impl SubAssign for Saturating<u16>

impl SubAssign for Saturating<u32>

impl SubAssign for Saturating<u64>

impl SubAssign for Saturating<u128>

impl SubAssign for Saturating<usize>

impl SubAssign for Wrapping<i8>

impl SubAssign for Wrapping<i16>

impl SubAssign for Wrapping<i32>

impl SubAssign for Wrapping<i64>

impl SubAssign for Wrapping<i128>

impl SubAssign for Wrapping<isize>

impl SubAssign for Wrapping<u8>

impl SubAssign for Wrapping<u16>

impl SubAssign for Wrapping<u32>

impl SubAssign for Wrapping<u64>

impl SubAssign for Wrapping<u128>

impl SubAssign for Wrapping<usize>

impl SubAssign for core::time::Duration

impl SubAssign for TimeDelta

impl SubAssign for Duration

impl SubAssign<&f16> for f16

impl SubAssign<&f32> for f32

impl SubAssign<&f64> for f64

impl SubAssign<&f128> for f128

impl SubAssign<&i8> for i8

impl SubAssign<&i8> for Saturating<i8>

impl SubAssign<&i8> for Wrapping<i8>

impl SubAssign<&i16> for i16

impl SubAssign<&i16> for Saturating<i16>

impl SubAssign<&i16> for Wrapping<i16>

impl SubAssign<&i32> for i32

impl SubAssign<&i32> for Saturating<i32>

impl SubAssign<&i32> for Wrapping<i32>

impl SubAssign<&i64> for i64

impl SubAssign<&i64> for Saturating<i64>

impl SubAssign<&i64> for Wrapping<i64>

impl SubAssign<&i128> for i128

impl SubAssign<&i128> for Saturating<i128>

impl SubAssign<&i128> for Wrapping<i128>

impl SubAssign<&isize> for isize

impl SubAssign<&isize> for Saturating<isize>

impl SubAssign<&isize> for Wrapping<isize>

impl SubAssign<&u8> for u8

impl SubAssign<&u8> for Saturating<u8>

impl SubAssign<&u8> for Wrapping<u8>

impl SubAssign<&u16> for u16

impl SubAssign<&u16> for Saturating<u16>

impl SubAssign<&u16> for Wrapping<u16>

impl SubAssign<&u32> for u32

impl SubAssign<&u32> for Saturating<u32>

impl SubAssign<&u32> for Wrapping<u32>

impl SubAssign<&u64> for u64

impl SubAssign<&u64> for Saturating<u64>

impl SubAssign<&u64> for Wrapping<u64>

impl SubAssign<&u128> for u128

impl SubAssign<&u128> for Saturating<u128>

impl SubAssign<&u128> for Wrapping<u128>

impl SubAssign<&usize> for usize

impl SubAssign<&usize> for Saturating<usize>

impl SubAssign<&usize> for Wrapping<usize>

impl SubAssign<&BigInt> for BigInt

impl SubAssign<&BigUint> for BigUint

impl SubAssign<&Saturating<i8>> for Saturating<i8>

impl SubAssign<&Saturating<i16>> for Saturating<i16>

impl SubAssign<&Saturating<i32>> for Saturating<i32>

impl SubAssign<&Saturating<i64>> for Saturating<i64>

impl SubAssign<&Saturating<i128>> for Saturating<i128>

impl SubAssign<&Saturating<isize>> for Saturating<isize>

impl SubAssign<&Saturating<u8>> for Saturating<u8>

impl SubAssign<&Saturating<u16>> for Saturating<u16>

impl SubAssign<&Saturating<u32>> for Saturating<u32>

impl SubAssign<&Saturating<u64>> for Saturating<u64>

impl SubAssign<&Saturating<u128>> for Saturating<u128>

impl SubAssign<&Saturating<usize>> for Saturating<usize>

impl SubAssign<&Wrapping<i8>> for Wrapping<i8>

impl SubAssign<&Wrapping<i16>> for Wrapping<i16>

impl SubAssign<&Wrapping<i32>> for Wrapping<i32>

impl SubAssign<&Wrapping<i64>> for Wrapping<i64>

impl SubAssign<&Wrapping<i128>> for Wrapping<i128>

impl SubAssign<&Wrapping<isize>> for Wrapping<isize>

impl SubAssign<&Wrapping<u8>> for Wrapping<u8>

impl SubAssign<&Wrapping<u16>> for Wrapping<u16>

impl SubAssign<&Wrapping<u32>> for Wrapping<u32>

impl SubAssign<&Wrapping<u64>> for Wrapping<u64>

impl SubAssign<&Wrapping<u128>> for Wrapping<u128>

impl SubAssign<&Wrapping<usize>> for Wrapping<usize>

impl SubAssign<i8> for BigInt

impl SubAssign<i8> for Saturating<i8>

impl SubAssign<i8> for Wrapping<i8>

impl SubAssign<i16> for BigInt

impl SubAssign<i16> for Saturating<i16>

impl SubAssign<i16> for Wrapping<i16>

impl SubAssign<i32> for BigInt

impl SubAssign<i32> for Saturating<i32>

impl SubAssign<i32> for Wrapping<i32>

impl SubAssign<i64> for BigInt

impl SubAssign<i64> for Saturating<i64>

impl SubAssign<i64> for Wrapping<i64>

impl SubAssign<i128> for BigInt

impl SubAssign<i128> for Saturating<i128>

impl SubAssign<i128> for Wrapping<i128>

impl SubAssign<isize> for BigInt

impl SubAssign<isize> for Saturating<isize>

impl SubAssign<isize> for Wrapping<isize>

impl SubAssign<u8> for BigInt

impl SubAssign<u8> for BigUint

impl SubAssign<u8> for Saturating<u8>

impl SubAssign<u8> for Wrapping<u8>

impl SubAssign<u16> for BigInt

impl SubAssign<u16> for BigUint

impl SubAssign<u16> for Saturating<u16>

impl SubAssign<u16> for Wrapping<u16>

impl SubAssign<u32> for BigInt

impl SubAssign<u32> for BigUint

impl SubAssign<u32> for Saturating<u32>

impl SubAssign<u32> for Wrapping<u32>

impl SubAssign<u64> for BigInt

impl SubAssign<u64> for BigUint

impl SubAssign<u64> for Saturating<u64>

impl SubAssign<u64> for Wrapping<u64>

impl SubAssign<u128> for BigInt

impl SubAssign<u128> for BigUint

impl SubAssign<u128> for Saturating<u128>

impl SubAssign<u128> for Wrapping<u128>

impl SubAssign<usize> for BigInt

impl SubAssign<usize> for BigUint

impl SubAssign<usize> for Saturating<usize>

impl SubAssign<usize> for Wrapping<usize>

impl SubAssign<Duration> for std::time::Instant

impl SubAssign<Duration> for SystemTime

impl SubAssign<Duration> for NaiveDateTime

Subtract-assign std::time::Duration from NaiveDateTime.

As a part of Chrono’s [leap second handling], the addition assumes that there is no leap second ever, except when the NaiveDateTime itself represents a leap second in which case the assumption becomes that there is exactly a single leap second ever.

Panics

Panics if the resulting date would be out of range. Consider using NaiveDateTime::checked_sub_signed to get an Option instead.

impl SubAssign<Duration> for NaiveTime

Subtract-assign std::time::Duration from NaiveTime.

This wraps around and never overflows or underflows. In particular the subtraction ignores integral number of days.

impl SubAssign<Duration> for Date

impl SubAssign<Duration> for Duration

impl SubAssign<Duration> for Instant

impl SubAssign<Duration> for OffsetDateTime

impl SubAssign<Duration> for PrimitiveDateTime

impl SubAssign<Duration> for Time

impl SubAssign<Duration> for UtcDateTime

impl SubAssign<TimeDelta> for NaiveDate

Subtract-assign TimeDelta from NaiveDate.

This discards the fractional days in TimeDelta, rounding to the closest integral number of days towards TimeDelta::zero(). It is the same as the addition with a negated TimeDelta.

Panics

Panics if the resulting date would be out of range. Consider using NaiveDate::checked_sub_signed to get an Option instead.

impl SubAssign<TimeDelta> for NaiveDateTime

Subtract-assign TimeDelta from NaiveDateTime.

This is the same as the addition with a negated TimeDelta.

As a part of Chrono’s [leap second handling], the addition assumes that there is no leap second ever, except when the NaiveDateTime itself represents a leap second in which case the assumption becomes that there is exactly a single leap second ever.

Panics

Panics if the resulting date would be out of range. Consider using NaiveDateTime::checked_sub_signed to get an Option instead.

impl SubAssign<TimeDelta> for NaiveTime

Subtract-assign TimeDelta from NaiveTime.

This wraps around and never overflows or underflows. In particular the subtraction ignores integral number of days.

impl SubAssign<Duration> for core::time::Duration

impl SubAssign<Duration> for std::time::Instant

impl SubAssign<Duration> for SystemTime

impl SubAssign<Duration> for Date

impl SubAssign<Duration> for OffsetDateTime

impl SubAssign<Duration> for PrimitiveDateTime

impl SubAssign<Duration> for Time

impl SubAssign<Duration> for UtcDateTime

impl<O> SubAssign for F32<O>

where O: ByteOrder,

impl<O> SubAssign for F64<O>

where O: ByteOrder,

impl<O> SubAssign for I16<O>

where O: ByteOrder,

impl<O> SubAssign for I32<O>

where O: ByteOrder,

impl<O> SubAssign for I64<O>

where O: ByteOrder,

impl<O> SubAssign for I128<O>

where O: ByteOrder,

impl<O> SubAssign for Isize<O>

where O: ByteOrder,

impl<O> SubAssign for U16<O>

where O: ByteOrder,

impl<O> SubAssign for U32<O>

where O: ByteOrder,

impl<O> SubAssign for U64<O>

where O: ByteOrder,

impl<O> SubAssign for U128<O>

where O: ByteOrder,

impl<O> SubAssign for Usize<O>

where O: ByteOrder,

impl<O> SubAssign<f32> for F32<O>

where O: ByteOrder,

impl<O> SubAssign<f64> for F64<O>

where O: ByteOrder,

impl<O> SubAssign<i16> for I16<O>

where O: ByteOrder,

impl<O> SubAssign<i32> for I32<O>

where O: ByteOrder,

impl<O> SubAssign<i64> for I64<O>

where O: ByteOrder,

impl<O> SubAssign<i128> for I128<O>

where O: ByteOrder,

impl<O> SubAssign<isize> for Isize<O>

where O: ByteOrder,

impl<O> SubAssign<u16> for U16<O>

where O: ByteOrder,

impl<O> SubAssign<u32> for U32<O>

where O: ByteOrder,

impl<O> SubAssign<u64> for U64<O>

where O: ByteOrder,

impl<O> SubAssign<u128> for U128<O>

where O: ByteOrder,

impl<O> SubAssign<usize> for Usize<O>

where O: ByteOrder,

impl<O> SubAssign<F32<O>> for f32

where O: ByteOrder,

impl<O> SubAssign<F64<O>> for f64

where O: ByteOrder,

impl<O> SubAssign<I16<O>> for i16

where O: ByteOrder,

impl<O> SubAssign<I32<O>> for i32

where O: ByteOrder,

impl<O> SubAssign<I64<O>> for i64

where O: ByteOrder,

impl<O> SubAssign<I128<O>> for i128

where O: ByteOrder,

impl<O> SubAssign<Isize<O>> for isize

where O: ByteOrder,

impl<O> SubAssign<U16<O>> for u16

where O: ByteOrder,

impl<O> SubAssign<U32<O>> for u32

where O: ByteOrder,

impl<O> SubAssign<U64<O>> for u64

where O: ByteOrder,

impl<O> SubAssign<U128<O>> for u128

where O: ByteOrder,

impl<O> SubAssign<Usize<O>> for usize

where O: ByteOrder,

impl<T, S, A> SubAssign<&HashSet<T, S, A>> for HashSet<T, S, A>

where T: Eq + Hash + Clone, S: BuildHasher, A: Allocator,

impl<T, U, const N: usize> SubAssign<U> for Simd<T, N>

where Simd<T, N>: Sub<U, Output = Simd<T, N>>, T: SimdElement, LaneCount<N>: SupportedLaneCount,

impl<Tz> SubAssign<Duration> for DateTime<Tz>

where Tz: TimeZone,

Subtract-assign std::time::Duration from DateTime.

As a part of Chrono’s [leap second handling], the addition assumes that there is no leap second ever, except when the DateTime itself represents a leap second in which case the assumption becomes that there is exactly a single leap second ever.

Panics

Panics if the resulting date would be out of range. Consider using DateTime<Tz>::checked_sub_signed to get an Option instead.

impl<Tz> SubAssign<TimeDelta> for chrono::date::Date<Tz>

where Tz: TimeZone,

impl<Tz> SubAssign<TimeDelta> for DateTime<Tz>

where Tz: TimeZone,

Subtract-assign TimeDelta from DateTime.

This is the same as the addition with a negated TimeDelta.

As a part of Chrono’s [leap second handling], the addition assumes that there is no leap second ever, except when the DateTime itself represents a leap second in which case the assumption becomes that there is exactly a single leap second ever.

Panics

Panics if the resulting date would be out of range. Consider using DateTime<Tz>::checked_sub_signed to get an Option instead.