| 1 | #ifndef BOOST_SERIALIZATION_WRAPPER_HPP |
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| 2 | #define BOOST_SERIALIZATION_WRAPPER_HPP |
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| 3 | |
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| 4 | // (C) Copyright 2005-2006 Matthias Troyer |
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| 5 | // Use, modification and distribution is subject to the Boost Software |
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| 6 | // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
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| 7 | // http://www.boost.org/LICENSE_1_0.txt) |
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| 8 | |
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| 9 | #include <boost/serialization/traits.hpp> |
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| 10 | #include <boost/type_traits/is_base_and_derived.hpp> |
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| 11 | #include <boost/mpl/eval_if.hpp> |
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| 12 | #include <boost/mpl/bool_fwd.hpp> |
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| 13 | |
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| 14 | namespace boost { namespace serialization { |
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| 15 | |
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| 16 | /// the base class for serialization wrappers |
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| 17 | /// |
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| 18 | /// wrappers need to be treated differently at various places in the serialization library, |
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| 19 | /// e.g. saving of non-const wrappers has to be possible. Since partial specialization |
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| 20 | // is not supported by all compilers, we derive all wrappers from wrapper_traits. |
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| 21 | |
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| 22 | template< |
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| 23 | class T, |
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| 24 | int Level = object_serializable, |
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| 25 | int Tracking = track_never, |
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| 26 | unsigned int Version = 0, |
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| 27 | class ETII = extended_type_info_impl< T > |
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| 28 | > |
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| 29 | struct wrapper_traits : |
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| 30 | public traits<T,Level,Tracking,Version,ETII,mpl::true_> |
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| 31 | {}; |
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| 32 | |
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| 33 | template<class T> |
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| 34 | struct is_wrapper_impl : |
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| 35 | boost::mpl::eval_if< |
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| 36 | boost::is_base_and_derived<basic_traits,T>, |
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| 37 | boost::mpl::true_, |
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| 38 | boost::mpl::false_ |
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| 39 | >::type |
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| 40 | {}; |
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| 41 | |
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| 42 | template<class T> |
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| 43 | struct is_wrapper { |
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| 44 | typedef typename is_wrapper_impl<const T>::type type; |
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| 45 | }; |
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| 46 | |
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| 47 | } // serialization |
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| 48 | } // boost |
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| 49 | |
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| 50 | // A macro to define that a class is a wrapper |
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| 51 | #define BOOST_CLASS_IS_WRAPPER(T) \ |
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| 52 | namespace boost { \ |
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| 53 | namespace serialization { \ |
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| 54 | template<> \ |
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| 55 | struct is_wrapper_impl<const T> : boost::mpl::true_ {}; \ |
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| 56 | } \ |
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| 57 | } \ |
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| 58 | /**/ |
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| 59 | |
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| 60 | #endif //BOOST_SERIALIZATION_WRAPPER_HPP |
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| 61 | |
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