質問編集履歴
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test
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test
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@@ -8,37 +8,39 @@
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```rust
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use std::{ops::Mul, process::Output};
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use num::{Signed, Unsigned};
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struct Sample<T>(T);
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// Unsigedなprimitive型に対する計算(負の場合を考慮しない)
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impl Mul<u32> for
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impl<T> Mul<u32> for Sample<T> {
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type Output = Self;
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fn mul(self, rhs: u32) -> Self::Output {
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todo!()
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}
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}
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-
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// Signedなprimitive型に対する計算(負の場合も実装する)
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for
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impl<S:Signed + 'static + Copy,T> Mul<S> for Sample<T> {
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{
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type Output = Self;
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fn mul(self, rhs: S) -> Self::Output {
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if rhs < 0 {
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-
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-(self * rhs as u32)
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todo!()
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-
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self * rhs as u32
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}
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}
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@@ -52,8 +54,8 @@
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```
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conflicting implementations of trait `std::ops::Mul<u32>` for type `
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conflicting implementations of trait `std::ops::Mul<u32>` for type `Sample<_>`
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upstream crates may add a new impl of trait `
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upstream crates may add a new impl of trait `num::Signed` for type `u32` in future versions
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```
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