#include "fusion_container_from_element.hpp"
#include <boost/fusion/include/pair.hpp>
#include <boost/fusion/include/map.hpp>
#include <boost/fusion/include/at_key.hpp>

namespace fusion = boost::fusion;
int main() {
    typedef fusion::map<fusion::pair<int,char>,fusion::pair<char,int> > map_type;
    map_type m;
    int &i = fusion::at_key<char>(m);
    map_type *pm = boost::intrusive::detail::fusion_map_from_element<int,map_type,char>(&i);
    return 0;
}