Trait num::traits::WrappingNeg

pub trait WrappingNeg {
    pub fn wrapping_neg(&self) -> Self;
}

Performs a negation that does not panic.

Required methods

pub fn wrapping_neg(&self) -> Self

Wrapping (modular) negation. Computes -self, wrapping around at the boundary of the type.

Since unsigned types do not have negative equivalents all applications of this function will wrap (except for -0). For values smaller than the corresponding signed type’s maximum the result is the same as casting the corresponding signed value. Any larger values are equivalent to MAX + 1 - (val - MAX - 1) where MAX is the corresponding signed type’s maximum.

use num_traits::WrappingNeg;

assert_eq!(100i8.wrapping_neg(), -100);
assert_eq!((-100i8).wrapping_neg(), 100);
assert_eq!((-128i8).wrapping_neg(), -128); // wrapped!

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Implementations on Foreign Types

impl WrappingNeg for u32

pub fn wrapping_neg(&self) -> u32

impl WrappingNeg for usize

pub fn wrapping_neg(&self) -> usize

impl WrappingNeg for u16

pub fn wrapping_neg(&self) -> u16

impl WrappingNeg for i64

pub fn wrapping_neg(&self) -> i64

impl WrappingNeg for u128

pub fn wrapping_neg(&self) -> u128

impl WrappingNeg for i32

pub fn wrapping_neg(&self) -> i32

impl WrappingNeg for u64

pub fn wrapping_neg(&self) -> u64

impl WrappingNeg for isize

pub fn wrapping_neg(&self) -> isize

impl WrappingNeg for i128

pub fn wrapping_neg(&self) -> i128

impl WrappingNeg for u8

pub fn wrapping_neg(&self) -> u8

impl WrappingNeg for i16

pub fn wrapping_neg(&self) -> i16

impl<T> WrappingNeg for Wrapping<T> where
    T: WrappingNeg,
    Wrapping<T>: Neg,
    <Wrapping<T> as Neg>::Output == Wrapping<T>, 

pub fn wrapping_neg(&self) -> Wrapping<T>

impl WrappingNeg for i8

pub fn wrapping_neg(&self) -> i8

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Implementors

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