Chris@16: #ifndef BOOST_SERIALIZATION_WRAPPER_HPP
Chris@16: #define BOOST_SERIALIZATION_WRAPPER_HPP
Chris@16: 
Chris@16: // (C) Copyright 2005-2006 Matthias Troyer
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: #include <boost/serialization/traits.hpp>
Chris@16: #include <boost/type_traits/is_base_and_derived.hpp>
Chris@16: #include <boost/mpl/eval_if.hpp>
Chris@16: #include <boost/mpl/bool.hpp>
Chris@16: 
Chris@16: namespace boost { namespace serialization {
Chris@16: 
Chris@16: /// the base class for serialization wrappers
Chris@16: ///
Chris@16: /// wrappers need to be treated differently at various places in the serialization library,
Chris@16: /// e.g. saving of non-const wrappers has to be possible. Since partial specialization
Chris@16: // is not supported by all compilers, we derive all wrappers from wrapper_traits. 
Chris@16: 
Chris@16: template<
Chris@16:     class T, 
Chris@16:     int Level = object_serializable, 
Chris@16:     int Tracking = track_never,
Chris@16:     unsigned int Version = 0,
Chris@16:     class ETII = extended_type_info_impl< T >
Chris@16: >
Chris@16: struct wrapper_traits : 
Chris@16:     public traits<T,Level,Tracking,Version,ETII,mpl::true_> 
Chris@16: {};
Chris@16: 
Chris@16: template<class T>
Chris@16: struct is_wrapper_impl :
Chris@16:     boost::mpl::eval_if<
Chris@16:       boost::is_base_and_derived<basic_traits,T>,
Chris@16:       boost::mpl::true_,
Chris@16:       boost::mpl::false_
Chris@16:     >::type
Chris@16: {};
Chris@16: 
Chris@16: template<class T>
Chris@16: struct is_wrapper {
Chris@101:     typedef typename is_wrapper_impl<const T>::type type;
Chris@16: };
Chris@16: 
Chris@16: } // serialization
Chris@16: } // boost
Chris@16: 
Chris@16: // A macro to define that a class is a wrapper
Chris@16: #define BOOST_CLASS_IS_WRAPPER(T)                       \
Chris@16: namespace boost {                                       \
Chris@16: namespace serialization {                               \
Chris@16: template<>                                              \
Chris@16: struct is_wrapper_impl<const T> : boost::mpl::true_ {}; \
Chris@16: }                                                       \
Chris@16: }                                                       \
Chris@16: /**/
Chris@16: 
Chris@16: #endif //BOOST_SERIALIZATION_WRAPPER_HPP