//Purpose:
//  Test whether a function template can be specialized on fusion::list<>.
//
#include <boost/fusion/container/list.hpp>
#include <boost/fusion/include/empty.hpp>
#include <boost/fusion/include/pop_front.hpp>

#include <boost/mpl/assert.hpp>
#include <boost/type_traits/is_same.hpp>
#include <iostream>

  template
  < typename FusionSeq
  >
  unsigned
seq_size
  ( FusionSeq const& a_seq
  )
{

    if(!boost::fusion::empty(a_seq))
    {
        return 1
      #if 1
         + seq_size(boost::fusion::pop_front(a_seq))
      #endif
    ;}
    return 0;
}    

int main(void)
{
    typedef boost::fusion::list<int> list_int_t;
    list_int_t list_int(0);
    unsigned list_int_size=seq_size(list_int);
    std::cout<<"list_int_size="<<list_int_size<<"\n";
    return 0;
}