id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
11563	boost::range behavior changed from 1.55 to 1.56	fiesh@…	Neil Groves	"The following code sums up the problem, I think neither the behavior of <= 1.55 nor the one of >= 1.56 is desirable:

{{{
#include <boost/range/join.hpp>

#include <iostream>
#include <vector>

template <typename T>
void p(T const& t)
{
	for(const auto i: t) {
		std::cout << i << '\n';
	}
}

int main()
{
	std::vector<int> u(8, 0); // Make this const and it works.
	const std::vector<int> v(8, 0);
	p(boost::range::join(v, u)); // This does not work <= 1.55 but works >= 1.56
	p(boost::range::join(u, v)); // This does not work >= 1.56 but works <= 1.55

	return 0;
}
}}}

Also see http://melpon.org/wandbox/permlink/QuyJGrrLq3liyKDf for easier trial and error.

"	Bugs	new	To Be Determined	range	Boost 1.59.0	Problem