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226 lines
8.3 KiB
C++
226 lines
8.3 KiB
C++
#ifndef BOOST_SERIALIZATION_EXPORT_HPP
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#define BOOST_SERIALIZATION_EXPORT_HPP
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// MS compatible compilers support #pragma once
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#if defined(_MSC_VER)
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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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// export.hpp: set traits of classes to be serialized
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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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// (C) Copyright 2006 David Abrahams - http://www.boost.org.
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// implementation of class export functionality. This is an alternative to
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// "forward declaration" method to provoke instantiation of derived classes
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// that are to be serialized through pointers.
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#include <utility>
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#include <cstddef> // NULL
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#include <boost/config.hpp>
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#include <boost/static_assert.hpp>
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#include <boost/preprocessor/stringize.hpp>
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#include <boost/type_traits/is_polymorphic.hpp>
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#include <boost/mpl/assert.hpp>
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#include <boost/mpl/and.hpp>
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#include <boost/mpl/not.hpp>
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#include <boost/mpl/bool_fwd.hpp>
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#include <boost/serialization/extended_type_info.hpp> // for guid_defined only
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#include <boost/serialization/static_warning.hpp>
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#include <boost/serialization/assume_abstract.hpp>
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#include <boost/serialization/force_include.hpp>
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#include <boost/serialization/singleton.hpp>
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#include <boost/archive/detail/register_archive.hpp>
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#include <iostream>
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namespace boost {
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namespace archive {
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namespace detail {
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class basic_pointer_iserializer;
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class basic_pointer_oserializer;
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template<class Archive, class T>
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class pointer_iserializer;
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template<class Archive, class T>
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class pointer_oserializer;
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template <class Archive, class Serializable>
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struct export_impl
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{
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static const basic_pointer_iserializer &
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enable_load(mpl::true_){
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return boost::serialization::singleton<
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pointer_iserializer<Archive, Serializable>
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>::get_const_instance();
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}
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static const basic_pointer_oserializer &
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enable_save(mpl::true_){
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return boost::serialization::singleton<
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pointer_oserializer<Archive, Serializable>
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>::get_const_instance();
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}
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inline static void enable_load(mpl::false_) {}
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inline static void enable_save(mpl::false_) {}
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};
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// On many platforms, naming a specialization of this template is
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// enough to cause its argument to be instantiated.
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template <void(*)()>
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struct instantiate_function {};
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template <class Archive, class Serializable>
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struct ptr_serialization_support
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{
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# if defined(BOOST_MSVC) || defined(__SUNPRO_CC)
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virtual BOOST_DLLEXPORT void instantiate() BOOST_USED;
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# else
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static BOOST_DLLEXPORT void instantiate() BOOST_USED;
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typedef instantiate_function<
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&ptr_serialization_support::instantiate
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> x;
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# endif
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};
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template <class Archive, class Serializable>
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BOOST_DLLEXPORT void
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ptr_serialization_support<Archive,Serializable>::instantiate()
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{
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export_impl<Archive,Serializable>::enable_save(
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typename Archive::is_saving()
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);
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export_impl<Archive,Serializable>::enable_load(
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typename Archive::is_loading()
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);
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}
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// Note INTENTIONAL usage of anonymous namespace in header.
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// This was made this way so that export.hpp could be included
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// in other headers. This is still under study.
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namespace extra_detail {
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template<class T>
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struct guid_initializer
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{
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void export_guid(mpl::false_) const {
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// generates the statically-initialized objects whose constructors
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// register the information allowing serialization of T objects
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// through pointers to their base classes.
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instantiate_ptr_serialization((T*)0, 0, adl_tag());
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}
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void export_guid(mpl::true_) const {
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}
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guid_initializer const & export_guid() const {
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BOOST_STATIC_WARNING(boost::is_polymorphic< T >::value);
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// note: exporting an abstract base class will have no effect
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// and cannot be used to instantitiate serialization code
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// (one might be using this in a DLL to instantiate code)
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//BOOST_STATIC_WARNING(! boost::serialization::is_abstract< T >::value);
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export_guid(boost::serialization::is_abstract< T >());
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return *this;
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}
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};
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template<typename T>
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struct init_guid;
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} // anonymous
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} // namespace detail
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} // namespace archive
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} // namespace boost
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#define BOOST_CLASS_EXPORT_IMPLEMENT(T) \
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namespace boost { \
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namespace archive { \
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namespace detail { \
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namespace extra_detail { \
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template<> \
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struct init_guid< T > { \
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static guid_initializer< T > const & g; \
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}; \
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guid_initializer< T > const & init_guid< T >::g = \
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::boost::serialization::singleton< \
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guid_initializer< T > \
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>::get_mutable_instance().export_guid(); \
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}}}} \
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/**/
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#define BOOST_CLASS_EXPORT_KEY2(T, K) \
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namespace boost { \
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namespace serialization { \
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template<> \
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struct guid_defined< T > : boost::mpl::true_ {}; \
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template<> \
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inline const char * guid< T >(){ \
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return K; \
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} \
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} /* serialization */ \
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} /* boost */ \
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/**/
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#define BOOST_CLASS_EXPORT_KEY(T) \
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BOOST_CLASS_EXPORT_KEY2(T, BOOST_PP_STRINGIZE(T)) \
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/**/
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#define BOOST_CLASS_EXPORT_GUID(T, K) \
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BOOST_CLASS_EXPORT_KEY2(T, K) \
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BOOST_CLASS_EXPORT_IMPLEMENT(T) \
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/**/
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#if BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3205))
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// CodeWarrior fails to construct static members of class templates
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// when they are instantiated from within templates, so on that
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// compiler we ask users to specifically register base/derived class
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// relationships for exported classes. On all other compilers, use of
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// this macro is entirely optional.
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# define BOOST_SERIALIZATION_MWERKS_BASE_AND_DERIVED(Base,Derived) \
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namespace { \
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static int BOOST_PP_CAT(boost_serialization_mwerks_init_, __LINE__) = \
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(::boost::archive::detail::instantiate_ptr_serialization((Derived*)0,0), 3); \
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static int BOOST_PP_CAT(boost_serialization_mwerks_init2_, __LINE__) = ( \
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::boost::serialization::void_cast_register((Derived*)0,(Base*)0) \
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, 3); \
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}
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#else
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# define BOOST_SERIALIZATION_MWERKS_BASE_AND_DERIVED(Base,Derived)
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#endif
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// check for unnecessary export. T isn't polymorphic so there is no
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// need to export it.
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#define BOOST_CLASS_EXPORT_CHECK(T) \
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BOOST_STATIC_WARNING( \
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boost::is_polymorphic<U>::value \
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); \
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/**/
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// the default exportable class identifier is the class name
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// the default list of archives types for which code id generated
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// are the originally included with this serialization system
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#define BOOST_CLASS_EXPORT(T) \
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BOOST_CLASS_EXPORT_GUID( \
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T, \
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BOOST_PP_STRINGIZE(T) \
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) \
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/**/
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#endif // BOOST_SERIALIZATION_EXPORT_HPP
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