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