Function util::checked_sub [−][src]
pub fn checked_sub<A: PartialOrd<B> + Sub<B>, B>(
a: A,
b: B
) -> Option<<A as Sub<B>>::Output>
pub fn checked_sub<A: PartialOrd<B> + Sub<B>, B>(
a: A,
b: B
) -> Option<<A as Sub<B>>::Output>