williamr@4: #ifndef BOOST_SERIALIZATION_VERSION_HPP
williamr@4: #define BOOST_SERIALIZATION_VERSION_HPP
williamr@2: 
williamr@4: // MS compatible compilers support #pragma once
williamr@4: #if defined(_MSC_VER) && (_MSC_VER >= 1020)
williamr@4: # pragma once
williamr@2: #endif
williamr@2: 
williamr@4: /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
williamr@4: // version.hpp:
williamr@2: 
williamr@4: // (C) Copyright 2002 Robert Ramey - http://www.rrsd.com . 
williamr@4: // Use, modification and distribution is subject to the Boost Software
williamr@4: // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
williamr@4: // http://www.boost.org/LICENSE_1_0.txt)
williamr@2: 
williamr@4: //  See http://www.boost.org for updates, documentation, and revision history.
williamr@4: 
williamr@4: #include <boost/config.hpp>
williamr@4: #include <boost/mpl/int.hpp>
williamr@4: #include <boost/mpl/eval_if.hpp>
williamr@4: #include <boost/mpl/identity.hpp>
williamr@4: #include <boost/mpl/integral_c_tag.hpp>
williamr@4: 
williamr@4: #include <boost/type_traits/is_base_and_derived.hpp>
williamr@4: //#include <boost/serialization/traits.hpp>
williamr@4: 
williamr@4: namespace boost { 
williamr@4: namespace serialization {
williamr@4: 
williamr@4: struct basic_traits;
williamr@4: 
williamr@4: // default version number is 0. Override with higher version
williamr@4: // when class definition changes.
williamr@4: template<class T>
williamr@4: struct version
williamr@4: {
williamr@4:     template<class U>
williamr@4:     struct traits_class_version {
williamr@4:         typedef BOOST_DEDUCED_TYPENAME U::version type;
williamr@4:     };
williamr@4: 
williamr@4:     typedef mpl::integral_c_tag tag;
williamr@4:     // note: at least one compiler complained w/o the full qualification
williamr@4:     // on basic traits below
williamr@4:     typedef
williamr@4:         BOOST_DEDUCED_TYPENAME mpl::eval_if<
williamr@4:             is_base_and_derived<boost::serialization::basic_traits,T>,
williamr@4:             traits_class_version<T>,
williamr@4:             mpl::int_<0>
williamr@4:         >::type type;
williamr@4:     BOOST_STATIC_CONSTANT(unsigned int, value = version::type::value);
williamr@4: };
williamr@4: 
williamr@4: } // namespace serialization
williamr@4: } // namespace boost
williamr@4: 
williamr@4: // specify the current version number for the class
williamr@4: #define BOOST_CLASS_VERSION(T, N)                                      \
williamr@4: namespace boost {                                                      \
williamr@4: namespace serialization {                                              \
williamr@4: template<>                                                             \
williamr@4: struct version<T >                                                     \
williamr@4: {                                                                      \
williamr@4:     typedef mpl::int_<N> type;                                         \
williamr@4:     typedef mpl::integral_c_tag tag;                                   \
williamr@4:     BOOST_STATIC_CONSTANT(unsigned int, value = version::type::value); \
williamr@4:     /* require that class info saved when versioning is used */        \
williamr@4:     /*                                                                 \
williamr@4:     BOOST_STATIC_ASSERT((                                              \
williamr@4:         mpl::or_<                                                      \
williamr@4:             mpl::equal_to<                                             \
williamr@4:                 mpl::int_<0>,                                          \
williamr@4:                 mpl::int_<N>                                           \
williamr@4:             >,                                                         \
williamr@4:             mpl::equal_to<                                             \
williamr@4:                 implementation_level<T>,                               \
williamr@4:                 mpl::int_<object_class_info>                           \
williamr@4:             >                                                          \
williamr@4:         >::value                                                       \
williamr@4:     ));                                                                \
williamr@4:     */                                                                 \
williamr@4: };                                                                     \
williamr@4: }                                                                      \
williamr@4: }
williamr@4: 
williamr@4: #endif // BOOST_SERIALIZATION_VERSION_HPP