Chris@16: #ifndef BOOST_SERIALIZATION_NVP_HPP
Chris@16: #define BOOST_SERIALIZATION_NVP_HPP
Chris@16: 
Chris@16: // MS compatible compilers support #pragma once
Chris@101: #if defined(_MSC_VER)
Chris@16: # pragma once
Chris@16: #endif
Chris@16: 
Chris@16: /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
Chris@16: // nvp.hpp: interface for serialization system.
Chris@16: 
Chris@16: // (C) Copyright 2002 Robert Ramey - http://www.rrsd.com . 
Chris@16: // Use, modification and distribution is subject to the Boost Software
Chris@16: // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
Chris@16: // http://www.boost.org/LICENSE_1_0.txt)
Chris@16: 
Chris@16: //  See http://www.boost.org for updates, documentation, and revision history.
Chris@16: 
Chris@16: #include <utility>
Chris@16: 
Chris@16: #include <boost/config.hpp>
Chris@16: #include <boost/detail/workaround.hpp>
Chris@16: 
Chris@16: #include <boost/mpl/integral_c.hpp>
Chris@16: #include <boost/mpl/integral_c_tag.hpp>
Chris@16: 
Chris@16: #include <boost/serialization/level.hpp>
Chris@16: #include <boost/serialization/tracking.hpp>
Chris@16: #include <boost/serialization/split_member.hpp>
Chris@16: #include <boost/serialization/base_object.hpp>
Chris@16: #include <boost/serialization/traits.hpp>
Chris@16: #include <boost/serialization/wrapper.hpp>
Chris@16: 
Chris@16: namespace boost {
Chris@16: namespace serialization {
Chris@16: 
Chris@16: template<class T>
Chris@16: struct nvp : 
Chris@16:     public std::pair<const char *, T *>,
Chris@16:     public wrapper_traits<const nvp< T > >
Chris@16: {
Chris@16:     explicit nvp(const char * name_, T & t) :
Chris@16:         // note: redundant cast works around borland issue
Chris@16:         // note: added _ to suppress useless gcc warning
Chris@16:         std::pair<const char *, T *>(name_, (T*)(& t))
Chris@16:     {}
Chris@16:     nvp(const nvp & rhs) : 
Chris@16:         // note: redundant cast works around borland issue
Chris@16:         std::pair<const char *, T *>(rhs.first, (T*)rhs.second)
Chris@16:     {}
Chris@16: 
Chris@16:     const char * name() const {
Chris@16:         return this->first;
Chris@16:     }
Chris@16:     T & value() const {
Chris@16:         return *(this->second);
Chris@16:     }
Chris@16: 
Chris@16:     const T & const_value() const {
Chris@16:         return *(this->second);
Chris@16:     }
Chris@16: 
Chris@16:     // True64 compiler complains with a warning about the use of
Chris@16:     // the name "Archive" hiding some higher level usage.  I'm sure this
Chris@16:     // is an error but I want to accomodated as it generates a long warning
Chris@16:     // listing and might be related to a lot of test failures.
Chris@16:     // default treatment for name-value pairs. The name is
Chris@16:     // just discarded and only the value is serialized. 
Chris@16:     template<class Archivex>
Chris@16:     void save(
Chris@16:         Archivex & ar, 
Chris@16:         const unsigned int /* file_version */
Chris@16:     ) const {
Chris@16:         // CodeWarrior 8.x can't seem to resolve the << op for a rhs of "const T *"
Chris@16:         ar.operator<<(const_value());
Chris@16:     }
Chris@16:     template<class Archivex>
Chris@16:     void load(
Chris@16:         Archivex & ar, 
Chris@16:         const unsigned int /* file_version */
Chris@16:     ){
Chris@16:         // CodeWarrior 8.x can't seem to resolve the >> op for a rhs of "const T *"
Chris@16:         ar.operator>>(value());
Chris@16:     }
Chris@16:     BOOST_SERIALIZATION_SPLIT_MEMBER()
Chris@16: };
Chris@16: 
Chris@16: template<class T>
Chris@16: inline
Chris@16: #ifndef BOOST_NO_FUNCTION_TEMPLATE_ORDERING
Chris@16: const
Chris@16: #endif
Chris@16: nvp< T > make_nvp(const char * name, T & t){
Chris@16:     return nvp< T >(name, t);
Chris@16: }
Chris@16: 
Chris@16: // to maintain efficiency and portability, we want to assign
Chris@16: // specific serialization traits to all instances of this wrappers.
Chris@16: // we can't strait forward method below as it depends upon
Chris@16: // Partial Template Specialization and doing so would mean that wrappers
Chris@16: // wouldn't be treated the same on different platforms.  This would
Chris@16: // break archive portability. Leave this here as reminder not to use it !!!
Chris@16: 
Chris@16: template <class T>
Chris@16: struct implementation_level<nvp< T > >
Chris@16: {
Chris@16:     typedef mpl::integral_c_tag tag;
Chris@16:     typedef mpl::int_<object_serializable> type;
Chris@16:     BOOST_STATIC_CONSTANT(int, value = implementation_level::type::value);
Chris@16: };
Chris@16: 
Chris@16: // nvp objects are generally created on the stack and are never tracked
Chris@16: template<class T>
Chris@16: struct tracking_level<nvp< T > >
Chris@16: {
Chris@16:     typedef mpl::integral_c_tag tag;
Chris@16:     typedef mpl::int_<track_never> type;
Chris@16:     BOOST_STATIC_CONSTANT(int, value = tracking_level::type::value);
Chris@16: };
Chris@16: 
Chris@16: 
Chris@16: } // seralization
Chris@16: } // boost
Chris@16: 
Chris@16: #include <boost/preprocessor/stringize.hpp>
Chris@16: 
Chris@16: #define BOOST_SERIALIZATION_NVP(name)                              \
Chris@16:     boost::serialization::make_nvp(BOOST_PP_STRINGIZE(name), name)
Chris@16: /**/
Chris@16: 
Chris@16: #define BOOST_SERIALIZATION_BASE_OBJECT_NVP(name)                  \
Chris@16:     boost::serialization::make_nvp(                                \
Chris@16:         BOOST_PP_STRINGIZE(name),                                  \
Chris@16:         boost::serialization::base_object<name >(*this)            \
Chris@16:     )
Chris@16: /**/
Chris@16: 
Chris@16: #endif // BOOST_SERIALIZATION_NVP_HPP