#include <boost/fusion/include/vector.hpp>
#include <boost/fusion/mpl.hpp>

#define FUSION_VECTOR_POINTER_TO_MEMBER_TYPE_IMPL(z,n,_) \
    template<typename Vec> \
    struct vector_ptr_to_member_type<Vec, mpl::int_<n> > { typedef typename mpl::at_c<Vec,n>::type Vec::*type; };
#define FUSION_VECTOR_POINTER_TO_MEMBER_IMPL(z,n,_) \
    template<typename Vec> \
    typename mpl::at_c<Vec,n>::type Vec::*vector_ptr_to_member_impl(mpl::int_<n>) { return &Vec::m##n; }
 
namespace boost { namespace fusish {
	template<typename Vec, typename N>
	struct vector_ptr_to_member_type;
	BOOST_PP_REPEAT(20, FUSION_VECTOR_POINTER_TO_MEMBER_TYPE_IMPL, _)
	BOOST_PP_REPEAT(20, FUSION_VECTOR_POINTER_TO_MEMBER_IMPL, _)
	
	// should probably be metafunction
	template<typename Vec, int N>
	typename vector_ptr_to_member_type<Vec, mpl::int_<N> >::type 
	vector_ptr_to_member()
	{
	  return vector_ptr_to_member_impl<Vec>(mpl::int_<N>());
	}
}}