Ticket #1396: transform.cpp

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


struct identity
{
    template<class FunCall>
    struct result;

    template <class Fun, class T>
    struct result<Fun(T)>
    {
        typedef T type;
    };

    template <class T>
    T& operator()(T& val) const
    {
        return val;
    }

    template <class T>
    T const& operator()(T const& val) const
    {
        return val;
    }
};


int main()
{
    {
        typedef boost::fusion::vector<int, int> from_t;
        from_t from;
        boost::fusion::transform_view<from_t, ::identity> v(from, ::identity());

        boost::fusion::as_vector(v);
    }

    {
        typedef boost::mpl::vector<int, int> from_t;
        from_t from;
        boost::fusion::transform_view<from_t, ::identity> v(from, ::identity());

        boost::fusion::as_vector(v);
    }
}