boost/serialization/ephemeral.hpp

   1 #ifndef BOOST_SERIALIZATION_EPHEMERAL_HPP
   2 #define BOOST_SERIALIZATION_EPHEMERAL_HPP
   3
   4 // MS compatible compilers support
   5 #pragma once
   6 #if defined(_MSC_VER) && (_MSC_VER >= 1020)
   7 # pragma once
   8 #endif
   9
  10 /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
  11 // ephemeral_object.hpp: interface for serialization system.
  12
  13 // (C) Copyright 2007 Matthias Troyer.
  14 // Use, modification and distribution is subject to the Boost Software
  15 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  16 // http://www.boost.org/LICENSE_1_0.txt)
  17
  18 //  See http://www.boost.org for updates, documentation, and revision history.
  19
  20 #include <utility>
  21
  22 #include <boost/config.hpp>
  23 #include <boost/detail/workaround.hpp>
  24 // supress noise
  25 #if BOOST_WORKAROUND(BOOST_MSVC, <= 1200)
  26 # pragma warning (disable : 4786) // too long name, harmless warning
  27 #endif
  28
  29 #include <boost/mpl/integral_c.hpp>
  30 #include <boost/mpl/integral_c_tag.hpp>
  31
  32 #include <boost/serialization/level.hpp>
  33 #include <boost/serialization/tracking.hpp>
  34 #include <boost/serialization/split_member.hpp>
  35 #include <boost/serialization/base_object.hpp>
  36 #include <boost/serialization/traits.hpp>
  37 #include <boost/serialization/wrapper.hpp>
  38
  39 namespace boost {
  40 namespace serialization {
  41
  42 template<class T>
  43 struct ephemeral_object :
  44     public wrapper_traits<ephemeral_object<T> >
  45 {
  46     explicit ephemeral_object(T& t) :
  47         val(t)
  48     {}
  49
  50     T & value() const {
  51         return val;
  52     }
  53
  54     const T & const_value() const {
  55         return val;
  56     }
  57
  58     template<class Archive>
  59     void serialize(Archive &ar, const unsigned int) const
  60     {
  61        ar & val;
  62     }
  63
  64 private:
  65     T & val;
  66 };
  67
  68 template<class T>
  69 inline
  70 #ifndef BOOST_NO_FUNCTION_TEMPLATE_ORDERING
  71 const
  72 #endif
  73 ephemeral_object<T> ephemeral(const char * name, T & t){
  74     return ephemeral_object<T>(name, t);
  75 }
  76
  77 } // seralization
  78 } // boost
  79
  80 #endif // BOOST_SERIALIZATION_EPHEMERAL_HPP