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);

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

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 LibInBundleI

impl SubAssign for TimeDelta

impl SubAssign for otter_nodejs_tests::nix::fcntl::AtFlags

impl SubAssign for otter_nodejs_tests::nix::fcntl::FallocateFlags

impl SubAssign for otter_nodejs_tests::nix::fcntl::FdFlag

impl SubAssign for OFlag

impl SubAssign for otter_nodejs_tests::nix::fcntl::RenameFlags

impl SubAssign for SealFlag

impl SubAssign for SpliceFFlags

impl SubAssign for DeleteModuleFlags

impl SubAssign for ModuleInitFlags

impl SubAssign for MntFlags

impl SubAssign for otter_nodejs_tests::nix::mount::MsFlags

impl SubAssign for otter_nodejs_tests::nix::mqueue::FdFlag

impl SubAssign for MQ_OFlag

impl SubAssign for InterfaceFlags

impl SubAssign for PollFlags

impl SubAssign for CloneFlags

impl SubAssign for EpollCreateFlags

impl SubAssign for EpollFlags

impl SubAssign for EfdFlags

impl SubAssign for AddWatchFlags

impl SubAssign for InitFlags

impl SubAssign for MemFdCreateFlag

impl SubAssign for MRemapFlags

impl SubAssign for MapFlags

impl SubAssign for MlockAllFlags

impl SubAssign for otter_nodejs_tests::nix::sys::mman::MsFlags

impl SubAssign for ProtFlags

impl SubAssign for Persona

impl SubAssign for Options

impl SubAssign for QuotaValidFlags

impl SubAssign for SaFlags

impl SubAssign for SfdFlags

impl SubAssign for MsgFlags

impl SubAssign for SockFlag

impl SubAssign for TimestampingFlag

impl SubAssign for otter_nodejs_tests::nix::sys::stat::Mode

impl SubAssign for SFlag

impl SubAssign for FsFlags

impl SubAssign for ControlFlags

impl SubAssign for InputFlags

impl SubAssign for LocalFlags

impl SubAssign for OutputFlags

impl SubAssign for TimerFlags

impl SubAssign for TimerSetTimeFlags

impl SubAssign for WaitPidFlag

impl SubAssign for AccessFlags

impl SubAssign for DescId

impl SubAssign for SvgId

impl SubAssign for otter_nodejs_tests::Duration

impl SubAssign for FaceId

impl SubAssign for Notch

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 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 FileType

impl SubAssign for EventMask

impl SubAssign for WatchMask

impl SubAssign for Op

impl SubAssign for BigInt

impl SubAssign for BigUint

impl SubAssign for CipherCtxFlags

impl SubAssign for CMSOptions

impl SubAssign for OcspFlag

impl SubAssign for Pkcs7Flags

impl SubAssign for ExtensionContext

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 PIA

impl SubAssign for PIB

impl SubAssign for Transformations

impl SubAssign for CreateFlags

impl SubAssign for ReadFlags

impl SubAssign for WatchFlags

impl SubAssign for Access

impl SubAssign for rustix::backend::fs::types::AtFlags

impl SubAssign for rustix::backend::fs::types::FallocateFlags

impl SubAssign for MemfdFlags

impl SubAssign for rustix::backend::fs::types::Mode

impl SubAssign for OFlags

impl SubAssign for rustix::backend::fs::types::RenameFlags

impl SubAssign for ResolveFlags

impl SubAssign for SealFlags

impl SubAssign for StatVfsMountFlags

impl SubAssign for DupFlags

impl SubAssign for FdFlags

impl SubAssign for ReadWriteFlags

impl SubAssign for IFlags

impl SubAssign for StatxAttributes

impl SubAssign for StatxFlags

impl SubAssign for XattrFlags

impl SubAssign for Timespec

impl SubAssign for time::duration::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 Wrapping<i8>

impl SubAssign<&i8> for Saturating<i8>

impl SubAssign<&i16> for i16

impl SubAssign<&i16> for Wrapping<i16>

impl SubAssign<&i16> for Saturating<i16>

impl SubAssign<&i32> for i32

impl SubAssign<&i32> for Wrapping<i32>

impl SubAssign<&i32> for Saturating<i32>

impl SubAssign<&i64> for i64

impl SubAssign<&i64> for Wrapping<i64>

impl SubAssign<&i64> for Saturating<i64>

impl SubAssign<&i128> for i128

impl SubAssign<&i128> for Wrapping<i128>

impl SubAssign<&i128> for Saturating<i128>

impl SubAssign<&isize> for isize

impl SubAssign<&isize> for Wrapping<isize>

impl SubAssign<&isize> for Saturating<isize>

impl SubAssign<&u8> for u8

impl SubAssign<&u8> for Wrapping<u8>

impl SubAssign<&u8> for Saturating<u8>

impl SubAssign<&u16> for u16

impl SubAssign<&u16> for Wrapping<u16>

impl SubAssign<&u16> for Saturating<u16>

impl SubAssign<&u32> for u32

impl SubAssign<&u32> for Wrapping<u32>

impl SubAssign<&u32> for Saturating<u32>

impl SubAssign<&u64> for u64

impl SubAssign<&u64> for Wrapping<u64>

impl SubAssign<&u64> for Saturating<u64>

impl SubAssign<&u128> for u128

impl SubAssign<&u128> for Wrapping<u128>

impl SubAssign<&u128> for Saturating<u128>

impl SubAssign<&usize> for usize

impl SubAssign<&usize> for Wrapping<usize>

impl SubAssign<&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<&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<&BigInt> for BigInt

impl SubAssign<&BigUint> for BigUint

impl SubAssign<i8> for Wrapping<i8>

impl SubAssign<i8> for Saturating<i8>

impl SubAssign<i8> for BigInt

impl SubAssign<i16> for Wrapping<i16>

impl SubAssign<i16> for Saturating<i16>

impl SubAssign<i16> for BigInt

impl SubAssign<i32> for Wrapping<i32>

impl SubAssign<i32> for Saturating<i32>

impl SubAssign<i32> for BigInt

impl SubAssign<i64> for Wrapping<i64>

impl SubAssign<i64> for Saturating<i64>

impl SubAssign<i64> for BigInt

impl SubAssign<i128> for Wrapping<i128>

impl SubAssign<i128> for Saturating<i128>

impl SubAssign<i128> for BigInt

impl SubAssign<isize> for Wrapping<isize>

impl SubAssign<isize> for Saturating<isize>

impl SubAssign<isize> for BigInt

impl SubAssign<u8> for Wrapping<u8>

impl SubAssign<u8> for Saturating<u8>

impl SubAssign<u8> for BigInt

impl SubAssign<u8> for BigUint

impl SubAssign<u16> for Wrapping<u16>

impl SubAssign<u16> for Saturating<u16>

impl SubAssign<u16> for BigInt

impl SubAssign<u16> for BigUint

impl SubAssign<u32> for Wrapping<u32>

impl SubAssign<u32> for Saturating<u32>

impl SubAssign<u32> for BigInt

impl SubAssign<u32> for BigUint

impl SubAssign<u64> for Wrapping<u64>

impl SubAssign<u64> for Saturating<u64>

impl SubAssign<u64> for BigInt

impl SubAssign<u64> for BigUint

impl SubAssign<u128> for Wrapping<u128>

impl SubAssign<u128> for Saturating<u128>

impl SubAssign<u128> for BigInt

impl SubAssign<u128> for BigUint

impl SubAssign<usize> for LibInBundleI

impl SubAssign<usize> for DescId

impl SubAssign<usize> for SvgId

impl SubAssign<usize> for FaceId

impl SubAssign<usize> for Notch

impl SubAssign<usize> for Wrapping<usize>

impl SubAssign<usize> for Saturating<usize>

impl SubAssign<usize> for BigInt

impl SubAssign<usize> for BigUint

impl SubAssign<usize> for PIA

impl SubAssign<usize> for PIB

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 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 otter_nodejs_tests::Instant

impl SubAssign<Duration> for SystemTime

impl SubAssign<Duration> for time::date::Date

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

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

impl SubAssign<Duration> for OffsetDateTime

impl SubAssign<Duration> for PrimitiveDateTime

impl SubAssign<Duration> for Time

impl SubAssign<Duration> for tokio::time::instant::Instant

impl SubAssign<Duration> for otter_nodejs_tests::Duration

impl SubAssign<Duration> for otter_nodejs_tests::Instant

impl SubAssign<Duration> for SystemTime

Available on crate feature std only.

impl SubAssign<Duration> for time::date::Date

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

impl SubAssign<Duration> for OffsetDateTime

impl SubAssign<Duration> for PrimitiveDateTime

impl SubAssign<Duration> for Time

impl<'a, T> SubAssign<&'a OrderedFloat<T>> for OrderedFloat<T>

where T: SubAssign<&'a T>,

impl<'a, T> SubAssign<&'a Complex<T>> for Complex<T>

where T: Clone + NumAssign,

impl<'a, T> SubAssign<&'a Ratio<T>> for Ratio<T>

where T: Clone + Integer + NumAssign,

impl<'a, T> SubAssign<&'a T> for OrderedFloat<T>

where T: SubAssign<&'a T>,

impl<'a, T> SubAssign<&'a T> for Complex<T>

where T: Clone + NumAssign,

impl<'a, T> SubAssign<&'a T> for Ratio<T>

where T: Clone + Integer + NumAssign,

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> SubAssign for NotNan<T>

where T: Float + SubAssign,

impl<T> SubAssign for OrderedFloat<T>

where T: SubAssign,

impl<T> SubAssign for Complex<T>

where T: Clone + NumAssign,

impl<T> SubAssign for Ratio<T>

where T: Clone + Integer + NumAssign,

impl<T> SubAssign<&NotNan<T>> for NotNan<T>

where T: Float + SubAssign,

impl<T> SubAssign<&T> for NotNan<T>

where T: Float + SubAssign,

impl<T> SubAssign<T> for NotNan<T>

where T: Float + SubAssign,

impl<T> SubAssign<T> for OrderedFloat<T>

where T: SubAssign,

impl<T> SubAssign<T> for Ready

where T: Into<Ready>,

impl<T> SubAssign<T> for Complex<T>

where T: Clone + NumAssign,

impl<T> SubAssign<T> for Ratio<T>

where T: Clone + Integer + NumAssign,

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,

impl<Tz> SubAssign<TimeDelta> for otter_nodejs_tests::chrono::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.

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.