| #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 |
| #endif |
| |
| /////////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/assert.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> |
| |
| 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(int, value = version::type::value); |
| }; |
| |
| } // namespace serialization |
| } // namespace boost |
| |
| /* note: at first it seemed that this would be a good place to trap |
| * as an error an attempt to set a version # for a class which doesn't |
| * save its class information (including version #) in the archive. |
| * However, this imposes a requirement that the version be set after |
| * the implemention level which would be pretty confusing. If this |
| * is to be done, do this check in the input or output operators when |
| * ALL the serialization traits are available. Included the implementation |
| * here with this comment as a reminder not to do this! |
| */ |
| //#include <boost/serialization/level.hpp> |
| //#include <boost/mpl/equal_to.hpp> |
| |
| #include <boost/mpl/less.hpp> |
| #include <boost/mpl/comparison.hpp> |
| |
| // specify the current version number for the class |
| // version numbers limited to 8 bits !!! |
| #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(int, value = version::type::value); \ |
| BOOST_MPL_ASSERT(( \ |
| boost::mpl::less< \ |
| boost::mpl::int_<N>, \ |
| boost::mpl::int_<256> \ |
| > \ |
| )); \ |
| /* \ |
| BOOST_MPL_ASSERT(( \ |
| mpl::equal_to< \ |
| :implementation_level<T >, \ |
| mpl::int_<object_class_info> \ |
| >::value \ |
| )); \ |
| */ \ |
| }; \ |
| } \ |
| } |
| |
| #endif // BOOST_SERIALIZATION_VERSION_HPP |