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  // test_const.cpp
  
  // (C) Copyright 2002 Robert Ramey - http://www.rrsd.com . 
  // Use, modification and distribution is subject to the Boost Software
  // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  // http://www.boost.org/LICENSE_1_0.txt)
  
  #include <boost/serialization/access.hpp>
  #include <boost/serialization/base_object.hpp>
  #include <boost/serialization/export.hpp>
  #include <boost/serialization/level.hpp>
  #include <boost/serialization/level_enum.hpp>
  #include <boost/serialization/nvp.hpp>
  #include <boost/serialization/split_free.hpp>
  #include <boost/serialization/split_member.hpp>
  #include <boost/serialization/tracking.hpp>
  #include <boost/serialization/tracking_enum.hpp>
  #include <boost/serialization/traits.hpp>
  #include <boost/serialization/type_info_implementation.hpp>
  #include <boost/serialization/version.hpp> 
  
  struct foo
  {
      int x;
  private:
      friend class boost::serialization::access;
  
      template<class Archive>
      void serialize(Archive & ar, const unsigned int version)
      {
          // In compilers implementing 2-phase lookup, the call to
          // make_nvp is resolved even if foo::serialize() is never
          // instantiated.
          ar & boost::serialization::make_nvp("x",x);
      }
  };
  
  int
  main(int /*argc*/, char * /*argv*/[]){
      return 0;
  }
  