Trait core::ops::Neg

pub trait Neg {
    type Output;

    // Required method
    fn neg(self) -> Self::Output;
}

一元否定运算符 -。

Examples

Sign 的 Neg 实现，它允许使用 - 取反其值。

use std::ops::Neg;

#[derive(Debug, PartialEq)]
enum Sign {
    Negative,
    Zero,
    Positive,
}

impl Neg for Sign {
    type Output = Self;

    fn neg(self) -> Self::Output {
        match self {
            Sign::Negative => Sign::Positive,
            Sign::Zero => Sign::Zero,
            Sign::Positive => Sign::Negative,
        }
    }
}

// 否定的肯定就是否定的。
assert_eq!(-Sign::Positive, Sign::Negative);
// 双重否定就是肯定。
assert_eq!(-Sign::Negative, Sign::Positive);
// 零是它自己的否定。
assert_eq!(-Sign::Zero, Sign::Zero);

Required Associated Types

type Output

应用 - 运算符后的结果类型。

Required Methods

fn neg(self) -> Self::Output

执行一元 - 运算。

Example

let x: i32 = 12;
assert_eq!(-x, -12);

Implementors

impl Neg for &f32

type Output = <f32 as Neg>::Output

impl Neg for &f64

type Output = <f64 as Neg>::Output

impl Neg for &i8

type Output = <i8 as Neg>::Output

impl Neg for &i16

type Output = <i16 as Neg>::Output

impl Neg for &i32

type Output = <i32 as Neg>::Output

impl Neg for &i64

type Output = <i64 as Neg>::Output

impl Neg for &i128

type Output = <i128 as Neg>::Output

impl Neg for &isize

type Output = <isize as Neg>::Output

impl Neg for &NonZeroI8

type Output = <NonZeroI8 as Neg>::Output

impl Neg for &NonZeroI16

type Output = <NonZeroI16 as Neg>::Output

impl Neg for &NonZeroI32

type Output = <NonZeroI32 as Neg>::Output

impl Neg for &NonZeroI64

type Output = <NonZeroI64 as Neg>::Output

impl Neg for &NonZeroI128

type Output = <NonZeroI128 as Neg>::Output

impl Neg for &NonZeroIsize

type Output = <NonZeroIsize as Neg>::Output

impl Neg for &Saturating<i8>

type Output = <Saturating<i8> as Neg>::Output

impl Neg for &Saturating<i16>

type Output = <Saturating<i16> as Neg>::Output

impl Neg for &Saturating<i32>

type Output = <Saturating<i32> as Neg>::Output

impl Neg for &Saturating<i64>

type Output = <Saturating<i64> as Neg>::Output

impl Neg for &Saturating<i128>

type Output = <Saturating<i128> as Neg>::Output

impl Neg for &Saturating<isize>

type Output = <Saturating<isize> as Neg>::Output

impl Neg for &Wrapping<i8>

type Output = <Wrapping<i8> as Neg>::Output

impl Neg for &Wrapping<i16>

type Output = <Wrapping<i16> as Neg>::Output

impl Neg for &Wrapping<i32>

type Output = <Wrapping<i32> as Neg>::Output

impl Neg for &Wrapping<i64>

type Output = <Wrapping<i64> as Neg>::Output

impl Neg for &Wrapping<i128>

type Output = <Wrapping<i128> as Neg>::Output

impl Neg for &Wrapping<isize>

type Output = <Wrapping<isize> as Neg>::Output

impl Neg for &Wrapping<u8>

type Output = <Wrapping<u8> as Neg>::Output

impl Neg for &Wrapping<u16>

type Output = <Wrapping<u16> as Neg>::Output

impl Neg for &Wrapping<u32>

type Output = <Wrapping<u32> as Neg>::Output

impl Neg for &Wrapping<u64>

type Output = <Wrapping<u64> as Neg>::Output

impl Neg for &Wrapping<u128>

type Output = <Wrapping<u128> as Neg>::Output

impl Neg for &Wrapping<usize>

type Output = <Wrapping<usize> as Neg>::Output

impl Neg for f32

type Output = f32

impl Neg for f64

type Output = f64

impl Neg for i8

type Output = i8

impl Neg for i16

type Output = i16

impl Neg for i32

type Output = i32

impl Neg for i64

type Output = i64

impl Neg for i128

type Output = i128

impl Neg for isize

type Output = isize

impl Neg for vector_float

Available on PowerPC or PowerPC-64 only.

type Output = vector_float

impl Neg for vector_signed_char

Available on PowerPC or PowerPC-64 only.

type Output = vector_signed_char

impl Neg for vector_signed_int

Available on PowerPC or PowerPC-64 only.

type Output = vector_signed_int

impl Neg for vector_signed_short

Available on PowerPC or PowerPC-64 only.

type Output = vector_signed_short

impl Neg for NonZeroI8

type Output = NonZeroI8

impl Neg for NonZeroI16

type Output = NonZeroI16

impl Neg for NonZeroI32

type Output = NonZeroI32

impl Neg for NonZeroI64

type Output = NonZeroI64

impl Neg for NonZeroI128

type Output = NonZeroI128

impl Neg for NonZeroIsize

type Output = NonZeroIsize

impl Neg for Saturating<i8>

type Output = Saturating<i8>

impl Neg for Saturating<i16>

type Output = Saturating<i16>

impl Neg for Saturating<i32>

type Output = Saturating<i32>

impl Neg for Saturating<i64>

type Output = Saturating<i64>

impl Neg for Saturating<i128>

type Output = Saturating<i128>

impl Neg for Saturating<isize>

type Output = Saturating<isize>

impl Neg for Wrapping<i8>

type Output = Wrapping<i8>

impl Neg for Wrapping<i16>

type Output = Wrapping<i16>

impl Neg for Wrapping<i32>

type Output = Wrapping<i32>

impl Neg for Wrapping<i64>

type Output = Wrapping<i64>

impl Neg for Wrapping<i128>

type Output = Wrapping<i128>

impl Neg for Wrapping<isize>

type Output = Wrapping<isize>

impl Neg for Wrapping<u8>

type Output = Wrapping<u8>

impl Neg for Wrapping<u16>

type Output = Wrapping<u16>

impl Neg for Wrapping<u32>

type Output = Wrapping<u32>

impl Neg for Wrapping<u64>

type Output = Wrapping<u64>

impl Neg for Wrapping<u128>

type Output = Wrapping<u128>

impl Neg for Wrapping<usize>

type Output = Wrapping<usize>

impl<const LANES: usize> Neg for Simd<f32, LANES>where f32: SimdElement, LaneCount<LANES>: SupportedLaneCount,

type Output = Simd<f32, LANES>

impl<const LANES: usize> Neg for Simd<f64, LANES>where f64: SimdElement, LaneCount<LANES>: SupportedLaneCount,

type Output = Simd<f64, LANES>

impl<const LANES: usize> Neg for Simd<i8, LANES>where i8: SimdElement, LaneCount<LANES>: SupportedLaneCount,

type Output = Simd<i8, LANES>

impl<const LANES: usize> Neg for Simd<i16, LANES>where i16: SimdElement, LaneCount<LANES>: SupportedLaneCount,

type Output = Simd<i16, LANES>

impl<const LANES: usize> Neg for Simd<i32, LANES>where i32: SimdElement, LaneCount<LANES>: SupportedLaneCount,

type Output = Simd<i32, LANES>

impl<const LANES: usize> Neg for Simd<i64, LANES>where i64: SimdElement, LaneCount<LANES>: SupportedLaneCount,

type Output = Simd<i64, LANES>

impl<const LANES: usize> Neg for Simd<isize, LANES>where isize: SimdElement, LaneCount<LANES>: SupportedLaneCount,

type Output = Simd<isize, LANES>