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ratio_ops: fix Ord for Ratio

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This commit is contained in:
Quaternions 2025-02-21 12:07:18 -08:00
parent d638e633ba
commit 5cffc03ef6
1 changed files with 13 additions and 8 deletions

21
lib/ratio_ops/src/ratio.rs

@ -268,30 +268,35 @@ impl<LhsNum,LhsDen,RhsNum,RhsDen,T,U> PartialEq<Ratio<RhsNum,RhsDen>> for Ratio<
}
impl<Num,Den> Eq for Ratio<Num,Den> where Self:PartialEq{}
// Wow! These were both completely wrong!
// Idea: use a 'signed' trait instead of parity and float the sign to the numerator.
impl<LhsNum,LhsDen,RhsNum,RhsDen,T,U> PartialOrd<Ratio<RhsNum,RhsDen>> for Ratio<LhsNum,LhsDen>
where
LhsNum:Copy,
LhsDen:Copy,
LhsDen:Copy+Parity,
RhsNum:Copy,
RhsDen:Copy,
RhsDen:Copy+Parity,
LhsNum:core::ops::Mul<RhsDen,Output=T>,
LhsDen:core::ops::Mul<RhsNum,Output=T>,
RhsNum:core::ops::Mul<LhsDen,Output=U>,
T:PartialOrd<U>,
RhsDen:core::ops::Mul<LhsNum,Output=U>,
T:PartialOrd<U>+Ord,
{
#[inline]
fn partial_cmp(&self,other:&Ratio<RhsNum,RhsDen>)->Option<core::cmp::Ordering>{
(self.num*other.den).partial_cmp(&(other.num*self.den))
fn partial_cmp(&self,&other:&Ratio<RhsNum,RhsDen>)->Option<core::cmp::Ordering>{
self.partial_cmp_ratio(other)
}
}
impl<Num,Den,T> Ord for Ratio<Num,Den>
where
Num:Copy,
Den:Copy,
Den:Copy+Parity,
Num:core::ops::Mul<Den,Output=T>,
Den:core::ops::Mul<Num,Output=T>,
T:Ord,
{
#[inline]
fn cmp(&self,other:&Self)->std::cmp::Ordering{
(self.num*other.den).cmp(&(other.num*self.den))
fn cmp(&self,&other:&Self)->std::cmp::Ordering{
self.cmp_ratio(other)
}
}