#ifndef BOOST_SERIALIZATION_WEAK_PTR_HPP

 #define BOOST_SERIALIZATION_WEAK_PTR_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

 // shared_ptr.hpp: serialization for boost shared pointer

 // (C) Copyright 2004 Robert Ramey and Martin Ecker

 // 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/weak_ptr.hpp>

 #include <boost/serialization/shared_ptr.hpp>

 namespace boost {

 namespace serialization{

 template<class Archive, class T>

 inline void save(

     Archive & ar,

     const boost::weak_ptr<T> &t,

     const unsigned int /* file_version */

 ){

     const boost::shared_ptr<T> sp(t);

         ar << boost::serialization::make_nvp(NULL, sp);

 }

 template<class Archive, class T>

 inline void load(

     Archive & ar,

     boost::weak_ptr<T> &t,

     const unsigned int /* file_version */

 ){

     boost::shared_ptr<T> sp;

         ar >> boost::serialization::make_nvp(NULL, sp);

     t = sp;

 }

 template<class Archive, class T>

 inline void serialize(

     Archive & ar,

     boost::weak_ptr<T> &t,

     const unsigned int file_version

 ){

     boost::serialization::split_free(ar, t, file_version);

 }

 } // namespace serialization

 } // namespace boost

 #endif // BOOST_SERIALIZATION_WEAK_PTR_HPP