1.0.0[−][src]Trait core::ops::Neg

#[lang = "neg"]

pub trait Neg {
    type Output;

#[must_use]

    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 = Sign;

    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);Run

Associated Types

type Output[−]

The resulting type after applying the - operator.

Required methods

#[must_use]
fn neg(self) -> Self::Output[−]

Performs the unary - operation.

Implementors

impl Neg for Wrapping<i8>[src][−]

type Output = Self

impl Neg for Wrapping<i16>[src][−]

type Output = Self

impl Neg for Wrapping<i32>[src][−]

type Output = Self

impl Neg for Wrapping<i64>[src][−]

type Output = Self

impl Neg for Wrapping<i128>[src][−]

type Output = Self

impl Neg for Wrapping<isize>[src][−]

type Output = Self

impl Neg for Wrapping<u8>[src][−]

type Output = Self

impl Neg for Wrapping<u16>[src][−]

type Output = Self

impl Neg for Wrapping<u32>[src][−]

type Output = Self

impl Neg for Wrapping<u64>[src][−]

type Output = Self

impl Neg for Wrapping<u128>[src][−]

type Output = Self

impl Neg for Wrapping<usize>[src][−]

type Output = Self

impl Neg for f32[src][−]

type Output = f32

impl Neg for f64[src][−]

type Output = f64

impl Neg for i8[src][−]

type Output = i8

impl Neg for i16[src][−]

type Output = i16

impl Neg for i32[src][−]

type Output = i32

impl Neg for i64[src][−]

type Output = i64

impl Neg for i128[src][−]

type Output = i128

impl Neg for isize[src][−]

type Output = isize

impl<'_> Neg for &'_ Wrapping<i8>[src][−]

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

impl<'_> Neg for &'_ Wrapping<i16>[src][−]

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

impl<'_> Neg for &'_ Wrapping<i32>[src][−]

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

impl<'_> Neg for &'_ Wrapping<i64>[src][−]

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

impl<'_> Neg for &'_ Wrapping<i128>[src][−]

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

impl<'_> Neg for &'_ Wrapping<isize>[src][−]

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

impl<'_> Neg for &'_ Wrapping<u8>[src][−]

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

impl<'_> Neg for &'_ Wrapping<u16>[src][−]

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

impl<'_> Neg for &'_ Wrapping<u32>[src][−]

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

impl<'_> Neg for &'_ Wrapping<u64>[src][−]

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

impl<'_> Neg for &'_ Wrapping<u128>[src][−]

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

impl<'_> Neg for &'_ Wrapping<usize>[src][−]

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

impl<'_> Neg for &'_ f32[src][−]

type Output = <f32 as Neg>::Output

impl<'_> Neg for &'_ f64[src][−]

type Output = <f64 as Neg>::Output

impl<'_> Neg for &'_ i8[src][−]

type Output = <i8 as Neg>::Output

impl<'_> Neg for &'_ i16[src][−]

type Output = <i16 as Neg>::Output

impl<'_> Neg for &'_ i32[src][−]

type Output = <i32 as Neg>::Output

impl<'_> Neg for &'_ i64[src][−]

type Output = <i64 as Neg>::Output

impl<'_> Neg for &'_ i128[src][−]

type Output = <i128 as Neg>::Output

impl<'_> Neg for &'_ isize[src][−]

type Output = <isize as Neg>::Output