text: /* Copyright 2003-2013 Joaquin M Lopez Munoz.
   * Distributed under 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)
   *
   * See http://www.boost.org/libs/multi_index for library home page.
   */
  
  #ifndef BOOST_MULTI_INDEX_DETAIL_SERIALIZATION_VERSION_HPP
  #define BOOST_MULTI_INDEX_DETAIL_SERIALIZATION_VERSION_HPP
  
  #if defined(_MSC_VER)
  #pragma once
  #endif
  
  #include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */
  #include <boost/serialization/split_member.hpp>
  #include <boost/serialization/version.hpp>
  
  namespace boost{
  
  namespace multi_index{
  
  namespace detail{
  
  /* Helper class for storing and retrieving a given type serialization class
   * version while avoiding saving the number multiple times in the same
   * archive.
   * Behavior undefined if template partial specialization is not supported.
   */
  
  template<typename T>
  struct serialization_version
  {
    serialization_version():
      value(boost::serialization::version<serialization_version>::value){}
  
    serialization_version& operator=(unsigned int x){value=x;return *this;};
  
    operator unsigned int()const{return value;}
  
  private:
    friend class boost::serialization::access;
  
    BOOST_SERIALIZATION_SPLIT_MEMBER()
  
    template<class Archive>
    void save(Archive&,const unsigned int)const{}
  
    template<class Archive>
    void load(Archive&,const unsigned int version)
    {
      this->value=version;
    }
  
    unsigned int value;
  };
  
  } /* namespace multi_index::detail */
  
  } /* namespace multi_index */
  
  namespace serialization {
  template<typename T>
  struct version<boost::multi_index::detail::serialization_version<T> >
  {
    BOOST_STATIC_CONSTANT(int,value=version<T>::value);
  };
  } /* namespace serialization */
  
  } /* namespace boost */
  
  #endif
  