Trait num_traits::ops::checked::CheckedSub
source · [−]pub trait CheckedSub: Sized + Sub<Self, Output = Self> {
fn checked_sub(&self, v: &Self) -> Option<Self>;
}Expand description
Performs subtraction that returns None instead of wrapping around on underflow.
Required Methods
sourcefn checked_sub(&self, v: &Self) -> Option<Self>
fn checked_sub(&self, v: &Self) -> Option<Self>
Subtracts two numbers, checking for underflow. If underflow happens,
None is returned.