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.

Implementors

• impl CheckedSub for BigUint
• impl CheckedSub for BigInt
• impl CheckedSub for u8
• impl CheckedSub for u16
• impl CheckedSub for u32
• impl CheckedSub for u64
• impl CheckedSub for usize
• impl CheckedSub for i8
• impl CheckedSub for i16
• impl CheckedSub for i32
• impl CheckedSub for i64
• impl CheckedSub for isize