#ifndef BOOST_SERIALIZATION_VERSION_HPP

#define BOOST_SERIALIZATION_VERSION_HPP

// MS compatible compilers support #pragma once

#if defined(_MSC_VER) && (_MSC_VER >= 1020)

# pragma once

/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8

// version.hpp:

// (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)

//  See http://www.boost.org for updates, documentation, and revision history.

#include <boost/config.hpp>

#include <boost/mpl/int.hpp>

#include <boost/mpl/eval_if.hpp>

#include <boost/mpl/identity.hpp>

#include <boost/mpl/integral_c_tag.hpp>

#include <boost/type_traits/is_base_and_derived.hpp>

//#include <boost/serialization/traits.hpp>

namespace boost { 

namespace serialization {

struct basic_traits;

// default version number is 0. Override with higher version

// when class definition changes.

template<class T>

struct version

{

    template<class U>

    struct traits_class_version {

        typedef BOOST_DEDUCED_TYPENAME U::version type;

    };

    typedef mpl::integral_c_tag tag;

    // note: at least one compiler complained w/o the full qualification

    // on basic traits below

    typedef

        BOOST_DEDUCED_TYPENAME mpl::eval_if<

            is_base_and_derived<boost::serialization::basic_traits,T>,

            traits_class_version<T>,

            mpl::int_<0>

        >::type type;

    BOOST_STATIC_CONSTANT(unsigned int, value = version::type::value);

};

} // namespace serialization

} // namespace boost

// specify the current version number for the class

#define BOOST_CLASS_VERSION(T, N)                                      \

namespace boost {                                                      \

namespace serialization {                                              \

template<>                                                             \

struct version<T >                                                     \

{                                                                      \

    typedef mpl::int_<N> type;                                         \

    typedef mpl::integral_c_tag tag;                                   \

    BOOST_STATIC_CONSTANT(unsigned int, value = version::type::value); \

    /* require that class info saved when versioning is used */        \

    /*                                                                 \

    BOOST_STATIC_ASSERT((                                              \

        mpl::or_<                                                      \

            mpl::equal_to<                                             \

                mpl::int_<0>,                                          \

                mpl::int_<N>                                           \

            >,                                                         \

            mpl::equal_to<                                             \

                implementation_level<T>,                               \

                mpl::int_<object_class_info>                           \

            >                                                          \

        >::value                                                       \

    ));                                                                \

    */                                                                 \

};                                                                     \

}                                                                      \

}

#endif // BOOST_SERIALIZATION_VERSION_HPP