1 | #ifndef BOOST_EXTENDED_TYPE_INFO_NO_RTTI_HPP
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2 | #define BOOST_EXTENDED_TYPE_INFO_NO_RTTI_HPP
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3 | /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
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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 | // extended_type_info_no_rtti.hpp: implementation for version that depends
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10 | // on runtime typing (rtti - typeid) but uses a user specified string
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11 | // as the portable class identifier.
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12 |
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13 | // (C) Copyright 2002 Robert Ramey - http://www.rrsd.com .
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14 | // Use, modification and distribution is subject to the Boost Software
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15 | // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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16 | // http://www.boost.org/LICENSE_1_0.txt)
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17 |
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18 | // See http://www.boost.org for updates, documentation, and revision history.
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19 | #include <cassert>
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20 | #include <boost/config.hpp>
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21 | #include <boost/static_assert.hpp>
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22 | #include <boost/type_traits/is_const.hpp>
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23 |
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24 | #include <boost/serialization/extended_type_info.hpp>
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25 | #include <boost/mpl/bool.hpp>
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26 |
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27 | #include <boost/config/abi_prefix.hpp> // must be the last header
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28 | #ifdef BOOST_MSVC
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29 | # pragma warning(push)
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30 | # pragma warning(disable : 4251 4231 4660 4275)
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31 | #endif
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32 |
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33 | namespace boost {
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34 | namespace serialization {
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35 | namespace detail {
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36 | ///////////////////////////////////////////////////////////////////////
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37 | // define a special type_info that doesn't depend on rtti which is not
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38 | // available in all situations.
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39 |
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40 | // common base class to share type_info_key. This is used to
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41 | // identify the method used to keep track of the extended type
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42 | class BOOST_SERIALIZATION_DECL(BOOST_PP_EMPTY()) extended_type_info_no_rtti_0 :
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43 | public extended_type_info
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44 | {
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45 | virtual bool
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46 | less_than(const boost::serialization::extended_type_info &rhs) const ;
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47 | protected:
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48 | extended_type_info_no_rtti_0();
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49 | // account for bogus gcc warning
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50 | #if defined(__GNUC__)
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51 | virtual
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52 | #endif
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53 | ~extended_type_info_no_rtti_0();
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54 | public:
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55 | struct is_polymorphic
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56 | {
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57 | typedef boost::mpl::bool_<true> type;
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58 | BOOST_STATIC_CONSTANT(bool, value = is_polymorphic::type::value);
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59 | };
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60 | };
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61 |
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62 | template<class T>
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63 | class extended_type_info_no_rtti_1 :
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64 | public extended_type_info_no_rtti_0
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65 | {
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66 | protected:
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67 | extended_type_info_no_rtti_1(){}
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68 | public:
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69 | // note borland complains at making this destructor protected
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70 | ~extended_type_info_no_rtti_1(){};
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71 | static const boost::serialization::extended_type_info *
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72 | get_derived_extended_type_info(const T & t){
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73 | // find the type that corresponds to the most derived type.
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74 | // this implementation doesn't depend on typeid() but assumes
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75 | // that the specified type has a function of the following signature.
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76 | // A common implemention of such a function is to define as a virtual
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77 | // function.
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78 | const char * derived_key = t.get_key();
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79 | assert(NULL != derived_key);
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80 | return boost::serialization::extended_type_info::find(derived_key);
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81 | }
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82 | static boost::serialization::extended_type_info *
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83 | get_instance(){
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84 | static extended_type_info_no_rtti_1<T> instance;
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85 | return & instance;
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86 | }
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87 | static void
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88 | export_register(const char * key){
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89 | boost::serialization::extended_type_info * eti;
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90 | eti = get_instance();
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91 | eti->key_register(key); // initialize key and add to table
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92 | eti->self_register(); // add type to type table
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93 | }
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94 | };
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95 | } // namespace detail
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96 |
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97 | template<class T>
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98 | class extended_type_info_no_rtti :
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99 | public detail::extended_type_info_no_rtti_1<const T>
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100 | {
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101 | // private constructor to inhibit any existence other than the
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102 | // static one
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103 | extended_type_info_no_rtti(){}
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104 | ~extended_type_info_no_rtti(){};
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105 | };
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106 |
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107 | } // namespace serialization
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108 | } // namespace boost
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109 |
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110 | ///////////////////////////////////////////////////////////////////////////////
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111 | // If no other implementation has been designated as default,
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112 | // use this one. To use this implementation as the default, specify it
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113 | // before any of the other headers.
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114 |
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115 | #ifndef BOOST_SERIALIZATION_DEFAULT_TYPE_INFO
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116 | #define BOOST_SERIALIZATION_DEFAULT_TYPE_INFO(T) \
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117 | extended_type_info_no_rtti<const T>
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118 | /**/
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119 | #endif
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120 |
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121 | #ifdef BOOST_MSVC
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122 | #pragma warning(pop)
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123 | #endif
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124 | #include <boost/config/abi_suffix.hpp> // pops abi_suffix.hpp pragmas
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125 |
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126 | #endif // BOOST_EXTENDED_TYPE_INFO_NO_RTTI_HPP
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