[boost] [rational] PATCH: Use ordered_euclidean_ring_operators

Subject: [boost] [rational] PATCH: Use ordered_euclidean_ring_operators
From: Mario Lang (mlang_at_[hidden])
Date: 2010-10-30 18:45:46

Hi.

Below is a patch which makes rational.hpp use grouped arithmetic
operators.

While we are at it, use ordered_euclidean_ring_operators instead
of just ordered_field_operators.  While it might sound
strange at first, mod can make sense even for rational numbers.
For instance, Common Lisp, which has a native rational type,
works fine if mod is used on rational numbers...

template <typename IntType>
rational<IntType>& rational<IntType>::operator%= (const rational<IntType>& r)
{
    return *this -= r * floor(rational_cast<double>(*this / r));
}

I am aware that the use of floor() is probably problematic.
I am all open for comments and suggestions for improvements.




-- 
Thanks,
  ⡍⠁⠗⠊⠕