Trait num::CheckedSub

pub trait CheckedSub: Sub<Self, Output = Self> {
    fn checked_sub(&self, v: &Self) -> Option<Self>;
}

Performs subtraction that returns None instead of wrapping around on underflow.

Required methods

fn checked_sub(&self, v: &Self) -> Option<Self>

Subtracts two numbers, checking for underflow. If underflow happens, None is returned.

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Implementations on Foreign Types

impl CheckedSub for i16

fn checked_sub(&self, v: &i16) -> Option<i16>

impl CheckedSub for u32

fn checked_sub(&self, v: &u32) -> Option<u32>

impl CheckedSub for u128

fn checked_sub(&self, v: &u128) -> Option<u128>

impl CheckedSub for u16

fn checked_sub(&self, v: &u16) -> Option<u16>

impl CheckedSub for u8

fn checked_sub(&self, v: &u8) -> Option<u8>

impl CheckedSub for i64

fn checked_sub(&self, v: &i64) -> Option<i64>

impl CheckedSub for i32

fn checked_sub(&self, v: &i32) -> Option<i32>

impl CheckedSub for isize

fn checked_sub(&self, v: &isize) -> Option<isize>

impl CheckedSub for i128

fn checked_sub(&self, v: &i128) -> Option<i128>

impl CheckedSub for i8

fn checked_sub(&self, v: &i8) -> Option<i8>

impl CheckedSub for usize

fn checked_sub(&self, v: &usize) -> Option<usize>

impl CheckedSub for u64

fn checked_sub(&self, v: &u64) -> Option<u64>

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Implementors

impl CheckedSub for BigInt

fn checked_sub(&self, v: &BigInt) -> Option<BigInt>

impl CheckedSub for BigUint

fn checked_sub(&self, v: &BigUint) -> Option<BigUint>

impl<T> CheckedSub for Ratio<T> where
    T: Clone + Integer + CheckedSub + CheckedMul, 

fn checked_sub(&self, rhs: &Ratio<T>) -> Option<Ratio<T>>

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