sl@0: #ifndef BOOST_SERIALIZATION_NVP_HPP
sl@0: #define BOOST_SERIALIZATION_NVP_HPP
sl@0: 
sl@0: // MS compatible compilers support #pragma once
sl@0: #if defined(_MSC_VER) && (_MSC_VER >= 1020)
sl@0: # pragma once
sl@0: #endif
sl@0: 
sl@0: /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
sl@0: // nvp.hpp: interface for serialization system.
sl@0: 
sl@0: // (C) Copyright 2002 Robert Ramey - http://www.rrsd.com . 
sl@0: // Use, modification and distribution is subject to the Boost Software
sl@0: // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
sl@0: // http://www.boost.org/LICENSE_1_0.txt)
sl@0: 
sl@0: //  See http://www.boost.org for updates, documentation, and revision history.
sl@0: 
sl@0: #include <utility>
sl@0: 
sl@0: #include <boost/config.hpp>
sl@0: #include <boost/detail/workaround.hpp>
sl@0: // supress noise
sl@0: #if BOOST_WORKAROUND(BOOST_MSVC, <= 1200)
sl@0: # pragma warning (disable : 4786) // too long name, harmless warning
sl@0: #endif
sl@0: 
sl@0: #include <boost/mpl/integral_c.hpp>
sl@0: #include <boost/mpl/integral_c_tag.hpp>
sl@0: 
sl@0: #include <boost/serialization/level.hpp>
sl@0: #include <boost/serialization/tracking.hpp>
sl@0: #include <boost/serialization/split_member.hpp>
sl@0: #include <boost/serialization/base_object.hpp>
sl@0: #include <boost/serialization/traits.hpp>
sl@0: 
sl@0: namespace boost {
sl@0: namespace serialization {
sl@0: 
sl@0: template<class T>
sl@0: struct nvp : 
sl@0:     public std::pair<const char *, T *>,
sl@0:     public traits<nvp<T>, object_serializable, track_never>
sl@0: {
sl@0:     explicit nvp(const char * name, T & t) :
sl@0:         // note: redundant cast works around borland issue
sl@0:         std::pair<const char *, T *>(name, (T*)(& t))
sl@0:     {}
sl@0:     nvp(const nvp & rhs) : 
sl@0:         // note: redundant cast works around borland issue
sl@0:         std::pair<const char *, T *>(rhs.first, (T*)rhs.second)
sl@0:     {}
sl@0: 
sl@0:     const char * name() const {
sl@0:         return this->first;
sl@0:     }
sl@0:     T & value() const {
sl@0:         return *(this->second);
sl@0:     }
sl@0: 
sl@0:     const T & const_value() const {
sl@0:         return *(this->second);
sl@0:     }
sl@0: 
sl@0:     // True64 compiler complains with a warning about the use of
sl@0:     // the name "Archive" hiding some higher level usage.  I'm sure this
sl@0:     // is an error but I want to accomodated as it generates a long warning
sl@0:     // listing and might be related to a lot of test failures.
sl@0:     // default treatment for name-value pairs. The name is
sl@0:     // just discarded and only the value is serialized. 
sl@0:     template<class Archivex>
sl@0:     void save(
sl@0:         Archivex & ar, 
sl@0:         const unsigned int /* file_version */
sl@0:     ) const {
sl@0:         // CodeWarrior 8.x can't seem to resolve the << op for a rhs of "const T *"
sl@0:         ar.operator<<(const_value());
sl@0:     }
sl@0:     template<class Archivex>
sl@0:     void load(
sl@0:         Archivex & ar, 
sl@0:         const unsigned int /* file_version */
sl@0:     ){
sl@0:         // CodeWarrior 8.x can't seem to resolve the >> op for a rhs of "const T *"
sl@0:         ar.operator>>(value());
sl@0:     }
sl@0:     BOOST_SERIALIZATION_SPLIT_MEMBER()
sl@0: };
sl@0: 
sl@0: template<class T>
sl@0: inline
sl@0: #ifndef BOOST_NO_FUNCTION_TEMPLATE_ORDERING
sl@0: const
sl@0: #endif
sl@0: nvp<T> make_nvp(const char * name, T & t){
sl@0:     return nvp<T>(name, t);
sl@0: }
sl@0: 
sl@0: // to maintain efficiency and portability, we want to assign
sl@0: // specific serialization traits to all instances of this wrappers.
sl@0: // we can't strait forward method below as it depends upon
sl@0: // Partial Template Specialization and doing so would mean that wrappers
sl@0: // wouldn't be treated the same on different platforms.  This would
sl@0: // break archive portability. Leave this here as reminder not to use it !!!
sl@0: #if 0 // #ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
sl@0: 
sl@0: template <class T>
sl@0: struct implementation_level<nvp<T> >
sl@0: {
sl@0:     typedef mpl::integral_c_tag tag;
sl@0:     typedef mpl::int_<object_serializable> type;
sl@0:     BOOST_STATIC_CONSTANT(int, value = implementation_level::type::value);
sl@0: };
sl@0: 
sl@0: // nvp objects are generally created on the stack and are never tracked
sl@0: template<class T>
sl@0: struct tracking_level<nvp<T> >
sl@0: {
sl@0:     typedef mpl::integral_c_tag tag;
sl@0:     typedef mpl::int_<track_never> type;
sl@0:     BOOST_STATIC_CONSTANT(int, value = tracking_level::type::value);
sl@0: };
sl@0: 
sl@0: #endif
sl@0: 
sl@0: } // seralization
sl@0: } // boost
sl@0: 
sl@0: #include <boost/preprocessor/stringize.hpp>
sl@0: 
sl@0: #define BOOST_SERIALIZATION_NVP(name)                              \
sl@0:     boost::serialization::make_nvp(BOOST_PP_STRINGIZE(name), name)
sl@0: /**/
sl@0: 
sl@0: #define BOOST_SERIALIZATION_BASE_OBJECT_NVP(name)                  \
sl@0:     boost::serialization::make_nvp(                                \
sl@0:         BOOST_PP_STRINGIZE(name),                                  \
sl@0:         boost::serialization::base_object<name >(*this)            \
sl@0:     )
sl@0: /**/
sl@0: 
sl@0: #endif // BOOST_SERIALIZATION_NVP_HPP