Trait num::CheckedSub
[−]
[src]
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.
Implementations on Foreign Types
impl<T> CheckedSub for Ratio<T> where
T: Clone + Integer + CheckedSub + CheckedMul,
[src]
T: Clone + Integer + CheckedSub + CheckedMul,