boost/boost/serialization/forward_list.hpp

#ifndef BOOST_SERIALIZATION_FORWARD_LIST_HPP
#define BOOST_SERIALIZATION_FORWARD_LIST_HPP

// MS compatible compilers support #pragma once
#if defined(_MSC_VER)
# pragma once
#endif

/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
// forward_list.hpp

// (C) Copyright 2002 Robert Ramey - http://www.rrsd.com . 
// 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 <cstddef> // size_t
#include <forward_list>
#include <iterator>  // distance

#include <boost/config.hpp> // msvc 6.0 needs this for warning suppression
#if defined(BOOST_NO_STDC_NAMESPACE)
namespace std{ 
    using ::size_t; 
} // namespace std
#endif

#include <boost/serialization/collections_save_imp.hpp>
#include <boost/archive/detail/basic_iarchive.hpp>
#include <boost/serialization/access.hpp>
#include <boost/serialization/nvp.hpp>
#include <boost/serialization/collection_size_type.hpp>
#include <boost/serialization/item_version_type.hpp>
#include <boost/serialization/split_free.hpp>
#include <boost/serialization/detail/stack_constructor.hpp>
#include <boost/serialization/detail/is_default_constructible.hpp>

namespace boost { 
namespace serialization {

template<class Archive, class U, class Allocator>
inline void save(
    Archive & ar,
    const std::forward_list<U, Allocator> &t,
    const unsigned int file_version
){
    const collection_size_type count(std::distance(t.cbegin(), t.cend()));
    boost::serialization::stl::save_collection<
        Archive,
        std::forward_list<U, Allocator>
    >(ar, t, count);
}

template<class Archive, class U, class Allocator>
inline void load(
    Archive & ar,
    std::forward_list<U, Allocator> &t,
    const unsigned int file_version
){
    const boost::archive::library_version_type library_version(
        ar.get_library_version()
    );
    // retrieve number of elements
    item_version_type item_version(0);
    collection_size_type count;
    ar >> BOOST_SERIALIZATION_NVP(count);
    if(boost::archive::library_version_type(3) < library_version){
        ar >> BOOST_SERIALIZATION_NVP(item_version);
    }
    if(detail::is_default_constructible<U>()){
        t.resize(count);
        typename std::forward_list<U, Allocator>::iterator hint;
        hint = t.begin();
        while(count-- > 0){
            ar >> boost::serialization::make_nvp("item", *hint++);
        }
    }
    else{
        t.clear();
        boost::serialization::detail::stack_construct<Archive, U> u(ar, item_version);
        ar >> boost::serialization::make_nvp("item", u.reference());
        t.push_front(u.reference());
        typename std::forward_list<U, Allocator>::iterator last;
        last = t.begin();
        ar.reset_object_address(&(*t.begin()) , & u.reference());
        while(--count > 0){
            detail::stack_construct<Archive, U> u(ar, item_version);
            ar >> boost::serialization::make_nvp("item", u.reference());
            last = t.insert_after(last, u.reference());
            ar.reset_object_address(&(*last) , & u.reference());
        }
    }
}

// split non-intrusive serialization function member into separate
// non intrusive save/load member functions
template<class Archive, class U, class Allocator>
inline void serialize(
    Archive & ar,
    std::forward_list<U, Allocator> &t,
    const unsigned int file_version
){
    boost::serialization::split_free(ar, t, file_version);
}

} // serialization
} // namespace boost

#include <boost/serialization/collection_traits.hpp>

BOOST_SERIALIZATION_COLLECTION_TRAITS(std::forward_list)

#endif  // BOOST_SERIALIZATION_FORWARD_LIST_HPP