//OriginalSource:
//  email from Tim Moore
//  on 05/17/10 07:33
//  in response to post:
/*
From: Larry Evans <cppljevans@suddenlink.net>
Newsgroups: gmane.comp.lib.boost.user
Subject: [fusion]simple fusion seq_size fails to compile
Date: Sun, 16 May 2010 15:43:21 -0500
 */

#include <boost/fusion/container/list.hpp>
#include <boost/fusion/include/next.hpp>
#include <iostream>

template<typename IterSeqE>
unsigned int seq_size(IterSeqE b, IterSeqE e) {
  return 0;
}

template<typename IterSeqB, typename IterSeqE>
unsigned int seq_size(IterSeqB b, IterSeqE e) {
  return 1 + seq_size(next(b), e);
}

template<typename FusionSeq>
unsigned int seq_size(FusionSeq const& a_seq) {
  return seq_size(begin(a_seq), end(a_seq));
}

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