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
21namespace boost {
22namespace rtti {
23
24// ************************************************************************** //
25// ************** rtti::type_id ************** //
26// ************************************************************************** //
27
28typedef std::ptrdiff_t id_t;
29
30namespace rtti_detail {
31
32template<typename T>
33struct rttid_holder {
34 static id_t id() { return reinterpret_cast<id_t>( &inst() ); }
35
36private:
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
46template<typename T>
47inline id_t
48type_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