ceph/src/boost/libs/test/include/boost/test/utils/rtti.hpp

   1 //  (C) Copyright Gennadiy Rozental 2001.
   2 //  Distributed under the Boost Software License, Version 1.0.
   3 //  (See accompanying file LICENSE_1_0.txt or copy at
   4 //  http://www.boost.org/LICENSE_1_0.txt)
   5
   6 //  See http://www.boost.org/libs/test for the library home page.
   7 //
   8 //  File        : $RCSfile$
   9 //
  10 //  Version     : $Revision$
  11 //
  12 //  Description : simple facilities for accessing type information at runtime
  13 // ***************************************************************************
  14
  15 #ifndef BOOST_TEST_UTILS_RTTI_HPP
  16 #define BOOST_TEST_UTILS_RTTI_HPP
  17
  18 // C Runtime
  19 #include <cstddef>
  20
  21 namespace boost {
  22 namespace rtti {
  23
  24 // ************************************************************************** //
  25 // **************                   rtti::type_id              ************** //
  26 // ************************************************************************** //
  27
  28 typedef std::ptrdiff_t id_t;
  29
  30 namespace rtti_detail {
  31
  32 template<typename T>
  33 struct rttid_holder {
  34     static id_t id() { return reinterpret_cast<id_t>( &inst() ); }
  35
  36 private:
  37     struct rttid {};
  38
  39     static rttid const& inst() { static rttid s_inst; return s_inst; }
  40 };
  41
  42 } // namespace rtti_detail
  43
  44 //____________________________________________________________________________//
  45
  46 template<typename T>
  47 inline id_t
  48 type_id()
  49 {
  50     return rtti_detail::rttid_holder<T>::id();
  51 }
  52
  53 //____________________________________________________________________________//
  54
  55 #define BOOST_RTTI_SWITCH( type_id_ ) if( ::boost::rtti::id_t switch_by_id = type_id_ )
  56 #define BOOST_RTTI_CASE( type )       if( switch_by_id == ::boost::rtti::type_id<type>() )
  57
  58 //____________________________________________________________________________//
  59
  60 } // namespace rtti
  61 } // namespace boost
  62
  63 #endif // BOOST_TEST_UTILS_RTTI_HPP