pub trait CheckedSub: Sub<Self, Self> {
fn checked_sub(&self, v: &Self) -> Option<Self>;
}
fn checked_sub(&self, v: &Self) -> Option<Self>impl CheckedSub for intimpl CheckedSub for i8impl CheckedSub for i16impl CheckedSub for i32impl CheckedSub for i64impl CheckedSub for uintimpl CheckedSub for u8impl CheckedSub for u16impl CheckedSub for u32impl CheckedSub for u64
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