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107 lines
4.3 KiB
107 lines
4.3 KiB
#ifndef BOOST_SERIALIZATION_VERSION_HPP |
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#define BOOST_SERIALIZATION_VERSION_HPP |
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// MS compatible compilers support #pragma once |
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#if defined(_MSC_VER) && (_MSC_VER >= 1020) |
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# pragma once |
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#endif |
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/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8 |
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// version.hpp: |
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// (C) Copyright 2002 Robert Ramey - http://www.rrsd.com . |
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// Use, modification and distribution is subject to the Boost Software |
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// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
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// http://www.boost.org/LICENSE_1_0.txt) |
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// See http://www.boost.org for updates, documentation, and revision history. |
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#include <boost/config.hpp> |
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#include <boost/mpl/assert.hpp> |
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#include <boost/mpl/int.hpp> |
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#include <boost/mpl/eval_if.hpp> |
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#include <boost/mpl/identity.hpp> |
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#include <boost/mpl/integral_c_tag.hpp> |
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#include <boost/type_traits/is_base_and_derived.hpp> |
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namespace boost { |
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namespace serialization { |
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struct basic_traits; |
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// default version number is 0. Override with higher version |
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// when class definition changes. |
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template<class T> |
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struct version |
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{ |
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template<class U> |
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struct traits_class_version { |
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typedef BOOST_DEDUCED_TYPENAME U::version type; |
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}; |
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typedef mpl::integral_c_tag tag; |
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// note: at least one compiler complained w/o the full qualification |
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// on basic traits below |
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typedef |
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BOOST_DEDUCED_TYPENAME mpl::eval_if< |
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is_base_and_derived<boost::serialization::basic_traits,T>, |
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traits_class_version< T >, |
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mpl::int_<0> |
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>::type type; |
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BOOST_STATIC_CONSTANT(int, value = version::type::value); |
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}; |
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#ifndef BOOST_NO_INCLASS_MEMBER_INITIALIZATION |
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template<class T> |
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const int version<T>::value; |
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#endif |
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} // namespace serialization |
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} // namespace boost |
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/* note: at first it seemed that this would be a good place to trap |
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* as an error an attempt to set a version # for a class which doesn't |
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* save its class information (including version #) in the archive. |
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* However, this imposes a requirement that the version be set after |
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* the implemention level which would be pretty confusing. If this |
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* is to be done, do this check in the input or output operators when |
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* ALL the serialization traits are available. Included the implementation |
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* here with this comment as a reminder not to do this! |
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*/ |
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//#include <boost/serialization/level.hpp> |
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//#include <boost/mpl/equal_to.hpp> |
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#include <boost/mpl/less.hpp> |
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#include <boost/mpl/comparison.hpp> |
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// specify the current version number for the class |
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// version numbers limited to 8 bits !!! |
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#define BOOST_CLASS_VERSION(T, N) \ |
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namespace boost { \ |
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namespace serialization { \ |
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template<> \ |
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struct version<T > \ |
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{ \ |
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typedef mpl::int_<N> type; \ |
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typedef mpl::integral_c_tag tag; \ |
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BOOST_STATIC_CONSTANT(int, value = version::type::value); \ |
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BOOST_MPL_ASSERT(( \ |
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boost::mpl::less< \ |
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boost::mpl::int_<N>, \ |
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boost::mpl::int_<256> \ |
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> \ |
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)); \ |
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/* \ |
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BOOST_MPL_ASSERT(( \ |
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mpl::equal_to< \ |
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:implementation_level<T >, \ |
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mpl::int_<object_class_info> \ |
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>::value \ |
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)); \ |
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*/ \ |
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}; \ |
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} \ |
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} |
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#endif // BOOST_SERIALIZATION_VERSION_HPP
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