#include <iostream>

#include <boost/fusion/sequence/container/vector.hpp>
#include <boost/fusion/sequence/view/transform_view.hpp>
#include <boost/fusion/sequence/intrinsic.hpp>
#include <boost/fusion/sequence/io.hpp>

#include <boost/type_traits/add_reference.hpp>

namespace fusion = boost::fusion;

struct make_ref
{
    template<typename Sig>
    struct result;

    template<typename T>
    struct result<make_ref(T&)>
        : boost::add_reference<T>
    {};

    template<typename T>
    typename boost::add_reference<T>::type operator()(T& t) const
    {
        return t;
    }
};

int main()
{
    typedef fusion::vector<int, int> vec;
    vec v(1,2);
    fusion::transform_view<vec, make_ref> t(v, make_ref());
    fusion::at_c<0>(t) = 3;
    fusion::at_c<1>(t) = 4;
    std::cout << t << std::endl;
}