deps/boost_1_63_0/boost/serialization/extended_type_info.hpp

   1 #ifndef BOOST_SERIALIZATION_EXTENDED_TYPE_INFO_HPP
   2 #define BOOST_SERIALIZATION_EXTENDED_TYPE_INFO_HPP
   3
   4 // MS compatible compilers support #pragma once
   5 #if defined(_MSC_VER)
   6 # pragma once
   7 #endif
   8
   9 /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
  10 // extended_type_info.hpp: interface for portable version of type_info
  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 // for now, extended type info is part of the serialization libraries
  20 // this could change in the future.
  21 #include <cstdarg>
  22 #include <boost/assert.hpp>
  23 #include <cstddef> // NULL
  24 #include <boost/config.hpp>
  25 #include <boost/noncopyable.hpp>
  26 #include <boost/mpl/bool.hpp>
  27
  28 #include <boost/serialization/config.hpp>
  29 #include <boost/config/abi_prefix.hpp> // must be the last header
  30 #ifdef BOOST_MSVC
  31 #  pragma warning(push)
  32 #  pragma warning(disable : 4251 4231 4660 4275)
  33 #endif
  34
  35 #define BOOST_SERIALIZATION_MAX_KEY_SIZE 128
  36
  37 namespace boost {
  38 namespace serialization {
  39
  40 namespace void_cast_detail{
  41     class void_caster;
  42 }
  43
  44 class BOOST_SYMBOL_VISIBLE extended_type_info :
  45     private boost::noncopyable
  46 {
  47 private:
  48     friend class boost::serialization::void_cast_detail::void_caster;
  49
  50     // used to uniquely identify the type of class derived from this one
  51     // so that different derivations of this class can be simultaneously
  52     // included in implementation of sets and maps.
  53     const unsigned int m_type_info_key;
  54     virtual bool is_less_than(const extended_type_info & /*rhs*/) const = 0;
  55     virtual bool is_equal(const extended_type_info & /*rhs*/) const = 0;
  56     const char * m_key;
  57
  58 protected:
  59     BOOST_SERIALIZATION_DECL void key_unregister() const;
  60     BOOST_SERIALIZATION_DECL void key_register() const;
  61     // this class can't be used as is. It's just the
  62     // common functionality for all type_info replacement
  63     // systems.  Hence, make these protected
  64     BOOST_SERIALIZATION_DECL extended_type_info(
  65         const unsigned int type_info_key,
  66         const char * key
  67     );
  68     virtual BOOST_SERIALIZATION_DECL ~extended_type_info();
  69 public:
  70     const char * get_key() const {
  71         return m_key;
  72     }
  73     virtual const char * get_debug_info() const = 0;
  74     BOOST_SERIALIZATION_DECL bool operator<(const extended_type_info &rhs) const;
  75     BOOST_SERIALIZATION_DECL bool operator==(const extended_type_info &rhs) const;
  76     bool operator!=(const extended_type_info &rhs) const {
  77         return !(operator==(rhs));
  78     }
  79     // note explicit "export" of static function to work around
  80     // gcc 4.5 mingw error
  81     static BOOST_SERIALIZATION_DECL const extended_type_info *
  82     find(const char *key);
  83     // for plugins
  84     virtual void * construct(unsigned int /*count*/ = 0, ...) const = 0;
  85     virtual void destroy(void const * const /*p*/) const = 0;
  86 };
  87
  88 template<class T>
  89 struct guid_defined : boost::mpl::false_ {};
  90
  91 namespace ext {
  92     template <typename T>
  93     struct guid_impl
  94     {
  95         static inline const char * call()
  96         {
  97             return NULL;
  98         }
  99     };
 100 }
 101
 102 template<class T>
 103 inline const char * guid(){
 104     return ext::guid_impl<T>::call();
 105 }
 106
 107 } // namespace serialization
 108 } // namespace boost
 109
 110 #ifdef BOOST_MSVC
 111 #pragma warning(pop)
 112 #endif
 113
 114 #include <boost/config/abi_suffix.hpp> // pops abi_suffix.hpp pragmas
 115
 116 #endif // BOOST_SERIALIZATION_EXTENDED_TYPE_INFO_HPP