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impl Wrapping ops for Wrapping<T>

This commit is contained in:
Yoan Lecoq 2017-04-29 08:29:02 +02:00
parent 9c3e9791d2
commit 47b8c7b5ae
1 changed files with 18 additions and 0 deletions
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18
traits/src/ops/wrapping.rs
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@ -1,4 +1,5 @@
use std::ops::{Add, Sub, Mul};
use std::num::Wrapping;
macro_rules! wrapping_impl {
($trait_name:ident, $method:ident, $t:ty) => {
@ -76,6 +77,23 @@ wrapping_impl!(WrappingMul, wrapping_mul, i32);
wrapping_impl!(WrappingMul, wrapping_mul, i64);
wrapping_impl!(WrappingMul, wrapping_mul, isize);
// Well this is a bit funny, but all the more appropriate.
impl<T: WrappingAdd> WrappingAdd for Wrapping<T> where Wrapping<T>: Add<Output = Wrapping<T>> {
fn wrapping_add(&self, v: &Self) -> Self {
Wrapping(self.0.wrapping_add(&v.0))
}
}
impl<T: WrappingSub> WrappingSub for Wrapping<T> where Wrapping<T>: Sub<Output = Wrapping<T>> {
fn wrapping_sub(&self, v: &Self) -> Self {
Wrapping(self.0.wrapping_sub(&v.0))
}
}
impl<T: WrappingMul> WrappingMul for Wrapping<T> where Wrapping<T>: Mul<Output = Wrapping<T>> {
fn wrapping_mul(&self, v: &Self) -> Self {
Wrapping(self.0.wrapping_mul(&v.0))
}
}
#[test]
fn test_wrapping_traits() {