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Editing: rtti.hpp

//  (C) Copyright Gennadiy Rozental 2001.
//  Distributed under the Boost Software License, Version 1.0.
//  (See accompanying file LICENSE_1_0.txt or copy at
//  http://www.boost.org/LICENSE_1_0.txt)

//  See http://www.boost.org/libs/test for the library home page.
//
//  File        : $RCSfile$
//
//  Version     : $Revision$
//
//  Description : simple facilities for accessing type information at runtime
// ***************************************************************************

#ifndef BOOST_TEST_UTILS_RTTI_HPP
#define BOOST_TEST_UTILS_RTTI_HPP

// C Runtime
#include <cstddef>
#include <boost/test/detail/config.hpp>

namespace boost {
namespace rtti {

// ************************************************************************** //
// **************                   rtti::type_id              ************** //
// ************************************************************************** //

typedef std::ptrdiff_t id_t;

namespace rtti_detail {

template<typename T>
struct BOOST_TEST_DECL rttid_holder {
    static id_t id() { return reinterpret_cast<id_t>( &inst() ); }

private:
    struct rttid {};

static rttid const& inst() { static rttid s_inst; return s_inst; }
};

} // namespace rtti_detail

//____________________________________________________________________________//

template<typename T>
BOOST_TEST_DECL inline id_t
type_id()
{
    return rtti_detail::rttid_holder<T>::id();
}

//____________________________________________________________________________//

#define BOOST_RTTI_SWITCH( type_id_ ) if( ::boost::rtti::id_t switch_by_id = type_id_ )
#define BOOST_RTTI_CASE( type )       if( switch_by_id == ::boost::rtti::type_id<type>() )

//____________________________________________________________________________//

} // namespace rtti
} // namespace boost

#endif // BOOST_TEST_UTILS_RTTI_HPP

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