id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
13225	operator != fails in classes derived from boost::rational	Michael Hanrath <Michael.Hanrath@…>	Jonathan Turkanis	"In a class derived from boost::rational operator != seems to return ""false"" always.

{{{
#include <iostream>
#include <boost/rational.hpp>

struct RationalNumber : public boost::rational<int> {
	RationalNumber(int n, int d) : boost::rational<int>(n, d) {}
};

using namespace std;

template <typename T>	void	check()
{
T	r(2, 3);
T	q(2, 3);
T	s(2, 4);
	cout << (r!=q) << "" "" << (r!=s) << endl;
}

int	main()
{
	check<boost::rational<long long>>(); // works
	cout << ""---------------"" << endl;
	check<RationalNumber>(); // fails for boost version > 1_63_0
	return 0;
}

}}}

Bug appears since boost version 1_64_0 and is present in current development trunk (git repository on 20170921) still.
"	Bugs	new	To Be Determined	rational	Boost 1.64.0	Problem