Trait Neg 

pub trait Neg {
    type Output;

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

The unary negation operator -.

Examples

An implementation of Neg for Sign, which allows the use of - to negate its value.

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,
        }
    }
}

// A negative positive is a negative.
assert_eq!(-Sign::Positive, Sign::Negative);
// A double negative is a positive.
assert_eq!(-Sign::Negative, Sign::Positive);
// Zero is its own negation.
assert_eq!(-Sign::Zero, Sign::Zero);

Required Associated Types

type Output

The resulting type after applying the - operator.

Required Methods

fn neg(self) -> Self::Output

Performs the unary - operation.

Example

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

Implementors

impl Neg for &f16

type Output = <f16 as Neg>::Output

impl Neg for &f32

type Output = <f32 as Neg>::Output

impl Neg for &f64

type Output = <f64 as Neg>::Output

impl Neg for &f128

type Output = <f128 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 &NonZero<i8>

Available on non-crate feature ferrocene_certified only.

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

impl Neg for &NonZero<i16>

Available on non-crate feature ferrocene_certified only.

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

impl Neg for &NonZero<i32>

Available on non-crate feature ferrocene_certified only.

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

impl Neg for &NonZero<i64>

Available on non-crate feature ferrocene_certified only.

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

impl Neg for &NonZero<i128>

Available on non-crate feature ferrocene_certified only.

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

impl Neg for &NonZero<isize>

Available on non-crate feature ferrocene_certified only.

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

impl Neg for &Saturating<i8>

Available on non-crate feature ferrocene_certified only.

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

impl Neg for &Saturating<i16>

Available on non-crate feature ferrocene_certified only.

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

impl Neg for &Saturating<i32>

Available on non-crate feature ferrocene_certified only.

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

impl Neg for &Saturating<i64>

Available on non-crate feature ferrocene_certified only.

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

impl Neg for &Saturating<i128>

Available on non-crate feature ferrocene_certified only.

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

impl Neg for &Saturating<isize>

Available on non-crate feature ferrocene_certified only.

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

impl Neg for &Wrapping<i8>

Available on non-crate feature ferrocene_certified only.

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

impl Neg for &Wrapping<i16>

Available on non-crate feature ferrocene_certified only.

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

impl Neg for &Wrapping<i32>

Available on non-crate feature ferrocene_certified only.

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

impl Neg for &Wrapping<i64>

Available on non-crate feature ferrocene_certified only.

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

impl Neg for &Wrapping<i128>

Available on non-crate feature ferrocene_certified only.

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

impl Neg for &Wrapping<isize>

Available on non-crate feature ferrocene_certified only.

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

impl Neg for &Wrapping<u8>

Available on non-crate feature ferrocene_certified only.

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

impl Neg for &Wrapping<u16>

Available on non-crate feature ferrocene_certified only.

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

impl Neg for &Wrapping<u32>

Available on non-crate feature ferrocene_certified only.

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

impl Neg for &Wrapping<u64>

Available on non-crate feature ferrocene_certified only.

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

impl Neg for &Wrapping<u128>

Available on non-crate feature ferrocene_certified only.

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

impl Neg for &Wrapping<usize>

Available on non-crate feature ferrocene_certified only.

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

impl Neg for f16

type Output = f16

impl Neg for f32

type Output = f32

impl Neg for f64

type Output = f64

impl Neg for f128

type Output = f128

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 core::arch::powerpc::vector_float

Available on PowerPC or PowerPC-64 only.

type Output = vector_float

impl Neg for core::arch::powerpc::vector_signed_char

Available on PowerPC or PowerPC-64 only.

type Output = vector_signed_char

impl Neg for core::arch::powerpc::vector_signed_int

Available on PowerPC or PowerPC-64 only.

type Output = vector_signed_int

impl Neg for core::arch::powerpc::vector_signed_short

Available on PowerPC or PowerPC-64 only.

type Output = vector_signed_short

impl Neg for vector_double

Available on s390x only.

type Output = vector_double

impl Neg for core::arch::s390x::vector_float

Available on s390x only.

type Output = vector_float

impl Neg for core::arch::s390x::vector_signed_char

Available on s390x only.

type Output = vector_signed_char

impl Neg for core::arch::s390x::vector_signed_int

Available on s390x only.

type Output = vector_signed_int

impl Neg for vector_signed_long_long

Available on s390x only.

type Output = vector_signed_long_long

impl Neg for core::arch::s390x::vector_signed_short

Available on s390x only.

type Output = vector_signed_short

impl Neg for NonZero<i8>

Available on non-crate feature ferrocene_certified only.

type Output = NonZero<i8>

impl Neg for NonZero<i16>

Available on non-crate feature ferrocene_certified only.

type Output = NonZero<i16>

impl Neg for NonZero<i32>

Available on non-crate feature ferrocene_certified only.

type Output = NonZero<i32>

impl Neg for NonZero<i64>

Available on non-crate feature ferrocene_certified only.

type Output = NonZero<i64>

impl Neg for NonZero<i128>

Available on non-crate feature ferrocene_certified only.

type Output = NonZero<i128>

impl Neg for NonZero<isize>

Available on non-crate feature ferrocene_certified only.

type Output = NonZero<isize>

impl Neg for Saturating<i8>

Available on non-crate feature ferrocene_certified only.

type Output = Saturating<i8>

impl Neg for Saturating<i16>

Available on non-crate feature ferrocene_certified only.

type Output = Saturating<i16>

impl Neg for Saturating<i32>

Available on non-crate feature ferrocene_certified only.

type Output = Saturating<i32>

impl Neg for Saturating<i64>

Available on non-crate feature ferrocene_certified only.

type Output = Saturating<i64>

impl Neg for Saturating<i128>

Available on non-crate feature ferrocene_certified only.

type Output = Saturating<i128>

impl Neg for Saturating<isize>

Available on non-crate feature ferrocene_certified only.

type Output = Saturating<isize>

impl Neg for Wrapping<i8>

Available on non-crate feature ferrocene_certified only.

type Output = Wrapping<i8>

impl Neg for Wrapping<i16>

Available on non-crate feature ferrocene_certified only.

type Output = Wrapping<i16>

impl Neg for Wrapping<i32>

Available on non-crate feature ferrocene_certified only.

type Output = Wrapping<i32>

impl Neg for Wrapping<i64>

Available on non-crate feature ferrocene_certified only.

type Output = Wrapping<i64>

impl Neg for Wrapping<i128>

Available on non-crate feature ferrocene_certified only.

type Output = Wrapping<i128>

impl Neg for Wrapping<isize>

Available on non-crate feature ferrocene_certified only.

type Output = Wrapping<isize>

impl Neg for Wrapping<u8>

Available on non-crate feature ferrocene_certified only.

type Output = Wrapping<u8>

impl Neg for Wrapping<u16>

Available on non-crate feature ferrocene_certified only.

type Output = Wrapping<u16>

impl Neg for Wrapping<u32>

Available on non-crate feature ferrocene_certified only.

type Output = Wrapping<u32>

impl Neg for Wrapping<u64>

Available on non-crate feature ferrocene_certified only.

type Output = Wrapping<u64>

impl Neg for Wrapping<u128>

Available on non-crate feature ferrocene_certified only.

type Output = Wrapping<u128>

impl Neg for Wrapping<usize>

Available on non-crate feature ferrocene_certified only.

type Output = Wrapping<usize>

impl<const N: usize> Neg for Simd<f32, N>

where f32: SimdElement, LaneCount<N>: SupportedLaneCount,

Available on non-crate feature ferrocene_certified only.

type Output = Simd<f32, N>

impl<const N: usize> Neg for Simd<f64, N>

where f64: SimdElement, LaneCount<N>: SupportedLaneCount,

Available on non-crate feature ferrocene_certified only.

type Output = Simd<f64, N>

impl<const N: usize> Neg for Simd<i8, N>

where i8: SimdElement, LaneCount<N>: SupportedLaneCount,

Available on non-crate feature ferrocene_certified only.

type Output = Simd<i8, N>

impl<const N: usize> Neg for Simd<i16, N>

where i16: SimdElement, LaneCount<N>: SupportedLaneCount,

Available on non-crate feature ferrocene_certified only.

type Output = Simd<i16, N>

impl<const N: usize> Neg for Simd<i32, N>

where i32: SimdElement, LaneCount<N>: SupportedLaneCount,

Available on non-crate feature ferrocene_certified only.

type Output = Simd<i32, N>

impl<const N: usize> Neg for Simd<i64, N>

where i64: SimdElement, LaneCount<N>: SupportedLaneCount,

Available on non-crate feature ferrocene_certified only.

type Output = Simd<i64, N>

impl<const N: usize> Neg for Simd<isize, N>

where isize: SimdElement, LaneCount<N>: SupportedLaneCount,

Available on non-crate feature ferrocene_certified only.

type Output = Simd<isize, N>