boost/serialization/factory.hpp

   1 #ifndef BOOST_SERIALIZATION_FACTORY_HPP
   2 #define BOOST_SERIALIZATION_FACTORY_HPP
   3
   4 /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
   5 // MS compatible compilers support #pragma once
   6 #if defined(_MSC_VER) && (_MSC_VER >= 1020)
   7 # pragma once
   8 #endif
   9
  10 // factory.hpp: create an instance from an extended_type_info instance.
  11
  12 // (C) Copyright 2002 Robert Ramey - http://www.rrsd.com .
  13 // Use, modification and distribution is subject to the Boost Software
  14 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  15 // http://www.boost.org/LICENSE_1_0.txt)
  16
  17 //  See http://www.boost.org for updates, documentation, and revision history.
  18
  19 #include <cstdarg>
  20 #include <cstddef> // NULL
  21
  22 #include <boost/preprocessor/control/if.hpp>
  23 #include <boost/preprocessor/comparison/greater.hpp>
  24 #include <boost/preprocessor/facilities/empty.hpp>
  25
  26 namespace std{
  27     #if defined(__LIBCOMO__)
  28         using ::va_list;
  29     #endif
  30 } // namespace std
  31
  32 namespace boost {
  33 namespace serialization {
  34
  35 // default implementation does nothing.
  36 template<class T, int N>
  37 T * factory(std::va_list){
  38     assert(false);
  39     // throw exception here?
  40     return NULL;
  41 }
  42
  43 } // namespace serialization
  44 } // namespace boost
  45
  46 #define BOOST_SERIALIZATION_FACTORY(N, T, A0, A1, A2, A3) \
  47 namespace boost {                                         \
  48 namespace serialization {                                 \
  49     template<>                                            \
  50     T * factory<T, N>(std::va_list ap){                   \
  51         BOOST_PP_IF(BOOST_PP_GREATER(N,0)                 \
  52             ,A0 a0 = va_arg(ap, A0);                      \
  53         ,BOOST_PP_IF(BOOST_PP_GREATER(N,1)                \
  54             ,A1 a1 = va_arg(ap, A1);                      \
  55         ,BOOST_PP_IF(BOOST_PP_GREATER(N,2)                \
  56             ,A2 a2 = va_arg(ap, A2);                      \
  57         ,BOOST_PP_IF(BOOST_PP_GREATER(N,3)                \
  58             ,A3 a3 = va_arg(ap, A3);                      \
  59             ,BOOST_PP_EMPTY()                             \
  60         ))))                                              \
  61         return new T(                                     \
  62             BOOST_PP_IF(BOOST_PP_GREATER(N,0)             \
  63                 ,a0                                       \
  64             ,BOOST_PP_IF(BOOST_PP_GREATER(N,1)            \
  65                 ,a1                                       \
  66             ,BOOST_PP_IF(BOOST_PP_GREATER(N,2)            \
  67                 ,a2                                       \
  68             ,BOOST_PP_IF(BOOST_PP_GREATER(N,3)            \
  69                 ,a3                                       \
  70                 ,BOOST_PP_EMPTY()                         \
  71             ))))                                          \
  72         );                                                \
  73     }                                                     \
  74 }                                                         \
  75 }                                                         \
  76 /**/
  77
  78 #define BOOST_SERIALIZATION_FACTORY_4(T, A0, A1, A2, A3) \
  79     BOOST_SERIALIZATION_FACTORY(4, T, A0, A1, A2, A3)
  80
  81 #define BOOST_SERIALIZATION_FACTORY_3(T, A0, A1, A2)     \
  82     BOOST_SERIALIZATION_FACTORY(3, T, A0, A1, A2, 0)
  83
  84 #define BOOST_SERIALIZATION_FACTORY_2(T, A0, A1)         \
  85     BOOST_SERIALIZATION_FACTORY(2, T, A0, A1, 0, 0)
  86
  87 #define BOOST_SERIALIZATION_FACTORY_1(T, A0)             \
  88     BOOST_SERIALIZATION_FACTORY(1, T, A0, 0, 0, 0)
  89
  90 #define BOOST_SERIALIZATION_FACTORY_0(T)                 \
  91     BOOST_SERIALIZATION_FACTORY(0, T, 0, 0, 0, 0)
  92
  93 #endif // BOOST_SERIALIZATION_FACTORY_HPP