#include "boost/filesystem.hpp"
#include "boost/version.hpp"

namespace boost { namespace filesystem3 {
	template < >
	path& path::append< typename path::iterator >( typename path::iterator begin, typename path::iterator end, const codecvt_type& cvt)
	{ 
		for( ; begin != end ; ++begin )
			*this /= *begin;
		return *this;
	}
	// Return path when appended to a_From will resolve to same as a_To
	boost::filesystem::path make_relative( boost::filesystem::path a_From, boost::filesystem::path a_To )
	{
		a_From = boost::filesystem::absolute( a_From ); a_To = boost::filesystem::absolute( a_To );
		boost::filesystem::path ret;
		boost::filesystem::path::const_iterator itrFrom( a_From.begin() ), itrTo( a_To.begin() );
		// Find common base
		for( boost::filesystem::path::const_iterator toEnd( a_To.end() ), fromEnd( a_From.end() ) ; itrFrom != fromEnd && itrTo != toEnd && *itrFrom == *itrTo; ++itrFrom, ++itrTo );
		// Navigate backwards in directory to reach previously found base
		for( boost::filesystem::path::const_iterator fromEnd( a_From.end() ); itrFrom != fromEnd; ++itrFrom )
		{
			if( (*itrFrom) != "." )
				ret /= "..";
		}
		// Now navigate down the directory branch
		ret.append( itrTo, a_To.end() );
		return ret;
	}
} }
namespace boost { namespace filesystem { using filesystem3::make_relative; } }


int main()
{
	boost::filesystem::path a("foo/bar"), b("foo/test/korv.txt");
	std::cout << boost::filesystem::make_relative( a, b ).string() << std::endl;
	return 0;
}