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1 #ifndef BOOST_SERIALIZATION_LEVEL_HPP
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2 #define BOOST_SERIALIZATION_LEVEL_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 // level.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/detail/workaround.hpp>
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21
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22 #include <boost/type_traits/is_fundamental.hpp>
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23 #include <boost/type_traits/is_enum.hpp>
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24 #include <boost/type_traits/is_array.hpp>
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25 #include <boost/type_traits/is_class.hpp>
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26 #include <boost/type_traits/is_base_and_derived.hpp>
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27
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28 #include <boost/mpl/eval_if.hpp>
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29 #include <boost/mpl/int.hpp>
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30 #include <boost/mpl/integral_c.hpp>
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31 #include <boost/mpl/integral_c_tag.hpp>
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32 #include <boost/mpl/aux_/nttp_decl.hpp>
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33
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34 #include <boost/serialization/level_enum.hpp>
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35
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36 namespace boost {
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37 namespace serialization {
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38
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39 struct basic_traits;
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40
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41 // default serialization implementation level
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42 template<class T>
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43 struct implementation_level_impl {
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44 template<class U>
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45 struct traits_class_level {
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46 typedef BOOST_DEDUCED_TYPENAME U::level type;
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47 };
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48
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49 typedef mpl::integral_c_tag tag;
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50 // note: at least one compiler complained w/o the full qualification
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51 // on basic traits below
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52 typedef
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53 BOOST_DEDUCED_TYPENAME mpl::eval_if<
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54 is_base_and_derived<boost::serialization::basic_traits, T>,
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55 traits_class_level< T >,
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56 //else
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57 BOOST_DEDUCED_TYPENAME mpl::eval_if<
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58 is_fundamental< T >,
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59 mpl::int_<primitive_type>,
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60 //else
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61 BOOST_DEDUCED_TYPENAME mpl::eval_if<
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62 is_class< T >,
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63 mpl::int_<object_class_info>,
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64 //else
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65 BOOST_DEDUCED_TYPENAME mpl::eval_if<
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66 is_array< T >,
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67 #if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x560))
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68 mpl::int_<not_serializable>,
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69 #else
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70 mpl::int_<object_serializable>,
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71 #endif
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72 //else
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73 BOOST_DEDUCED_TYPENAME mpl::eval_if<
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74 is_enum< T >,
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75 //#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x560))
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76 // mpl::int_<not_serializable>,
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77 //#else
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78 mpl::int_<primitive_type>,
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79 //#endif
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80 //else
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81 mpl::int_<not_serializable>
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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 >::type type;
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87 // vc 7.1 doesn't like enums here
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88 BOOST_STATIC_CONSTANT(int, value = type::value);
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89 };
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90
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91 template<class T>
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92 struct implementation_level :
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93 public implementation_level_impl<const T>
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94 {
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95 };
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96
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97 template<class T, BOOST_MPL_AUX_NTTP_DECL(int, L) >
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98 inline bool operator>=(implementation_level< T > t, enum level_type l)
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99 {
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100 return t.value >= (int)l;
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101 }
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102
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103 } // namespace serialization
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104 } // namespace boost
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105
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106 // specify the level of serialization implementation for the class
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107 // require that class info saved when versioning is used
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108 #define BOOST_CLASS_IMPLEMENTATION(T, E) \
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109 namespace boost { \
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110 namespace serialization { \
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111 template <> \
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112 struct implementation_level_impl< const T > \
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113 { \
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114 typedef mpl::integral_c_tag tag; \
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115 typedef mpl::int_< E > type; \
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116 BOOST_STATIC_CONSTANT( \
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117 int, \
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118 value = implementation_level_impl::type::value \
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119 ); \
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120 }; \
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121 } \
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122 }
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123 /**/
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124
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125 #endif // BOOST_SERIALIZATION_LEVEL_HPP
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