74 lines
1.8 KiB
Plaintext
74 lines
1.8 KiB
Plaintext
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/* Copyright 2003-2013 Joaquin M Lopez Munoz.
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* Distributed under the Boost Software License, Version 1.0.
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* (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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*
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* See http://www.boost.org/libs/multi_index for library home page.
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*/
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#ifndef BOOST_MULTI_INDEX_DETAIL_SERIALIZATION_VERSION_HPP
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#define BOOST_MULTI_INDEX_DETAIL_SERIALIZATION_VERSION_HPP
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#if defined(_MSC_VER)
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#pragma once
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#endif
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#include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */
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#include <boost/serialization/split_member.hpp>
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#include <boost/serialization/version.hpp>
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namespace boost{
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namespace multi_index{
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namespace detail{
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/* Helper class for storing and retrieving a given type serialization class
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* version while avoiding saving the number multiple times in the same
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* archive.
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* Behavior undefined if template partial specialization is not supported.
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*/
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template<typename T>
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struct serialization_version
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{
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serialization_version():
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value(boost::serialization::version<serialization_version>::value){}
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serialization_version& operator=(unsigned int x){value=x;return *this;};
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operator unsigned int()const{return value;}
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private:
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friend class boost::serialization::access;
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BOOST_SERIALIZATION_SPLIT_MEMBER()
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template<class Archive>
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void save(Archive&,const unsigned int)const{}
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template<class Archive>
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void load(Archive&,const unsigned int version)
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{
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this->value=version;
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}
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unsigned int value;
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};
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} /* namespace multi_index::detail */
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} /* namespace multi_index */
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namespace serialization {
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template<typename T>
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struct version<boost::multi_index::detail::serialization_version<T> >
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{
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BOOST_STATIC_CONSTANT(int,value=version<T>::value);
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};
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} /* namespace serialization */
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} /* namespace boost */
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#endif
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