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1 #ifndef BOOST_SERIALIZATION_VERSION_HPP |
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2 #define BOOST_SERIALIZATION_VERSION_HPP |
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3 |
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4 // MS compatible compilers support #pragma once |
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5 #if defined(_MSC_VER) && (_MSC_VER >= 1020) |
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6 # pragma once |
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7 #endif |
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8 |
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9 /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8 |
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10 // version.hpp: |
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11 |
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12 // (C) Copyright 2002 Robert Ramey - http://www.rrsd.com . |
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13 // Use, modification and distribution is subject to the Boost Software |
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14 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
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15 // http://www.boost.org/LICENSE_1_0.txt) |
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16 |
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17 // See http://www.boost.org for updates, documentation, and revision history. |
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18 |
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19 #include <boost/config.hpp> |
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20 #include <boost/mpl/int.hpp> |
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21 #include <boost/mpl/eval_if.hpp> |
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22 #include <boost/mpl/identity.hpp> |
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23 #include <boost/mpl/integral_c_tag.hpp> |
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24 |
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25 #include <boost/type_traits/is_base_and_derived.hpp> |
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26 //#include <boost/serialization/traits.hpp> |
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27 |
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28 namespace boost { |
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29 namespace serialization { |
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30 |
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31 struct basic_traits; |
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32 |
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33 // default version number is 0. Override with higher version |
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34 // when class definition changes. |
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35 template<class T> |
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36 struct version |
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37 { |
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38 template<class U> |
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39 struct traits_class_version { |
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40 typedef BOOST_DEDUCED_TYPENAME U::version type; |
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41 }; |
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42 |
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43 typedef mpl::integral_c_tag tag; |
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44 // note: at least one compiler complained w/o the full qualification |
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45 // on basic traits below |
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46 typedef |
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47 BOOST_DEDUCED_TYPENAME mpl::eval_if< |
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48 is_base_and_derived<boost::serialization::basic_traits,T>, |
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49 traits_class_version<T>, |
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50 mpl::int_<0> |
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51 >::type type; |
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52 BOOST_STATIC_CONSTANT(unsigned int, value = version::type::value); |
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53 }; |
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54 |
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55 } // namespace serialization |
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56 } // namespace boost |
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57 |
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58 // specify the current version number for the class |
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59 #define BOOST_CLASS_VERSION(T, N) \ |
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60 namespace boost { \ |
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61 namespace serialization { \ |
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62 template<> \ |
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63 struct version<T > \ |
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64 { \ |
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65 typedef mpl::int_<N> type; \ |
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66 typedef mpl::integral_c_tag tag; \ |
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67 BOOST_STATIC_CONSTANT(unsigned int, value = version::type::value); \ |
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68 /* require that class info saved when versioning is used */ \ |
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69 /* \ |
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70 BOOST_STATIC_ASSERT(( \ |
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71 mpl::or_< \ |
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72 mpl::equal_to< \ |
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73 mpl::int_<0>, \ |
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74 mpl::int_<N> \ |
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75 >, \ |
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76 mpl::equal_to< \ |
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77 implementation_level<T>, \ |
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78 mpl::int_<object_class_info> \ |
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79 > \ |
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80 >::value \ |
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81 )); \ |
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82 */ \ |
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83 }; \ |
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84 } \ |
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85 } |
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86 |
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87 #endif // BOOST_SERIALIZATION_VERSION_HPP |