Boost C++ Libraries

boost/flyweight/serialize.hpp

/* Copyright 2006-2023 Joaquin M Lopez Munoz.
 * Distributed under 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/libs/flyweight for library home page.
 */

#ifndef BOOST_FLYWEIGHT_SERIALIZE_HPP
#define BOOST_FLYWEIGHT_SERIALIZE_HPP

#if defined(_MSC_VER)&&(_MSC_VER>=1200)
#pragma once
#endif

#include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */
#include <boost/flyweight/flyweight_fwd.hpp>
#include <boost/flyweight/detail/archive_constructed.hpp>
#include <boost/flyweight/detail/serialization_helper.hpp>
#include <boost/core/serialization.hpp>
#include <boost/throw_exception.hpp>
#include <memory>
#include <stdexcept>

/* Serialization routines for flyweight<T>. 
 */

namespace boost{

namespace flyweights{

template<
  class Archive,
  typename T,typename Arg1,typename Arg2,typename Arg3
>
inline void serialize(
  Archive& ar,::boost::flyweights::flyweight<T,Arg1,Arg2,Arg3>& f,
  const unsigned int version)
{
  core::split_free(ar,f,version);
}                                               

template<
  class Archive,
  typename T,typename Arg1,typename Arg2,typename Arg3
>
void save(
  Archive& ar,const ::boost::flyweights::flyweight<T,Arg1,Arg2,Arg3>& f,
  const unsigned int /*version*/)
{
  typedef ::boost::flyweights::flyweight<T,Arg1,Arg2,Arg3>    flyweight;
  typedef ::boost::flyweights::detail::save_helper<flyweight> helper;
  typedef typename helper::size_type                          size_type;

  helper& hlp=ar.template get_helper<helper>();

  size_type n=hlp.find(f);
  ar<<make_nvp("item",n);
  if(n==hlp.size()){
    ar<<make_nvp("key",f.get_key());
    hlp.push_back(f);
  }
}

template<
  class Archive,
  typename T,typename Arg1,typename Arg2,typename Arg3
>
void load(
  Archive& ar,::boost::flyweights::flyweight<T,Arg1,Arg2,Arg3>& f,
  const unsigned int version)
{
  typedef ::boost::flyweights::flyweight<T,Arg1,Arg2,Arg3>    flyweight;
  typedef typename flyweight::key_type                        key_type;
  typedef ::boost::flyweights::detail::load_helper<flyweight> helper;
  typedef typename helper::size_type                          size_type;

  helper& hlp=ar.template get_helper<helper>();

  size_type n=0;
  ar>>make_nvp("item",n);
  if(n>hlp.size()){
    throw_exception(std::runtime_error("Invalid or corrupted archive"));
  }
  else if(n==hlp.size()){
    ::boost::flyweights::detail::archive_constructed<key_type> k(
      "key",ar,version);
    hlp.push_back(flyweight(k.get()));
  }
  f=hlp[n];
}

} /* namespace flyweights */

} /* namespace boost */

#endif