ceph/src/boost/libs/serialization/include/boost/serialization/wrapper.hpp

   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