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Trait std::ops::Neg

#[lang = "neg"]pub trait Neg {
    type Output;
    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);

Associated Types

type Output

The resulting type after applying the - operator.

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Required methods

fn neg(self) -> Self::Output

Performs the unary - operation.

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Implementors

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>

impl Neg for Wrapping<i16>[src]

type Output = Wrapping<i16>

impl Neg for Wrapping<i32>[src]

type Output = Wrapping<i32>

impl Neg for Wrapping<i64>[src]

type Output = Wrapping<i64>

impl Neg for Wrapping<i128>[src]

type Output = Wrapping<i128>

impl Neg for Wrapping<isize>[src]

type Output = Wrapping<isize>

impl Neg for Wrapping<u8>[src]

type Output = Wrapping<u8>

impl Neg for Wrapping<u16>[src]

type Output = Wrapping<u16>

impl Neg for Wrapping<u32>[src]

type Output = Wrapping<u32>

impl Neg for Wrapping<u64>[src]

type Output = Wrapping<u64>

impl Neg for Wrapping<u128>[src]

type Output = Wrapping<u128>

impl Neg for Wrapping<usize>[src]

type Output = Wrapping<usize>

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

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

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© 2010 The Rust Project Developers
Licensed under the Apache License, Version 2.0 or the MIT license, at your option.
https://doc.rust-lang.org/std/ops/trait.Neg.html