1 //  (C) Copyright Gennadiy Rozental 2005-2014.
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 {
idboost::rtti::rtti_detail::rttid_holder34     static id_t id() { return reinterpret_cast<id_t>( &inst() ); }
35 
36 private:
37     struct rttid {};
38 
instboost::rtti::rtti_detail::rttid_holder39     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
type_id()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
64