#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); }; #ifndef BOOST_NO_INCLASS_MEMBER_INITIALIZATION template<class T> const int version<T>::value; #endif } // 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