williamr@2: #ifndef BOOST_SERIALIZATION_TRAITS_HPP
williamr@2: #define BOOST_SERIALIZATION_TRAITS_HPP
williamr@2: 
williamr@2: // MS compatible compilers support #pragma once
williamr@2: #if defined(_MSC_VER) && (_MSC_VER >= 1020)
williamr@2: # pragma once
williamr@2: #endif
williamr@2: 
williamr@2: /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
williamr@2: // traits.hpp:
williamr@2: 
williamr@2: // (C) Copyright 2002 Robert Ramey - http://www.rrsd.com . 
williamr@2: // Use, modification and distribution is subject to the Boost Software
williamr@2: // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
williamr@2: // http://www.boost.org/LICENSE_1_0.txt)
williamr@2: 
williamr@2: //  See http://www.boost.org for updates, documentation, and revision history.
williamr@2: 
williamr@2: // This header is used to apply serialization traits to templates.  The
williamr@2: // standard system can't be used for platforms which don't support
williamr@2: // Partial Templlate Specialization.  
williamr@2: 
williamr@2: // The motivation for this is the Name-Value Pair (NVP) template.
williamr@2: // it has to work the same on all platforms in order for archives
williamr@2: // to be portable accross platforms.
williamr@2: 
williamr@2: #include <boost/config.hpp>
williamr@2: #include <boost/static_assert.hpp>
williamr@2: 
williamr@2: #include <boost/mpl/int.hpp>
williamr@2: #include <boost/serialization/level_enum.hpp>
williamr@2: #include <boost/serialization/tracking_enum.hpp>
williamr@2: 
williamr@2: namespace boost {
williamr@2: namespace serialization {
williamr@2: 
williamr@2: // common base class used to detect appended traits class
williamr@2: struct basic_traits {};
williamr@2: 
williamr@2: template <class T>
williamr@2: struct extended_type_info_impl;
williamr@2: 
williamr@2: template<
williamr@2:     class T, 
williamr@2:     int Level, 
williamr@2:     int Tracking,
williamr@2:     unsigned int Version = 0,
williamr@2:     class ETII = extended_type_info_impl< T >
williamr@2: >
williamr@2: struct traits : public basic_traits {
williamr@2:     BOOST_STATIC_ASSERT(Version == 0 || Level >= object_class_info);
williamr@2:     BOOST_STATIC_ASSERT(Tracking == track_never || Level >= object_serializable);
williamr@2:     typedef BOOST_DEDUCED_TYPENAME mpl::int_<Level> level;
williamr@2:     typedef BOOST_DEDUCED_TYPENAME mpl::int_<Tracking> tracking;
williamr@2:     typedef BOOST_DEDUCED_TYPENAME mpl::int_<Version> version;
williamr@2:     typedef ETII type_info_implementation;
williamr@2: };
williamr@2: 
williamr@2: } // namespace serialization
williamr@2: } // namespace boost
williamr@2: 
williamr@2: #endif // BOOST_SERIALIZATION_TRAITS_HPP