Chris@16: /*
Chris@101:  *          Copyright Andrey Semashev 2007 - 2015.
Chris@16:  * Distributed under the Boost Software License, Version 1.0.
Chris@16:  *    (See accompanying file LICENSE_1_0.txt or copy at
Chris@16:  *          http://www.boost.org/LICENSE_1_0.txt)
Chris@16:  */
Chris@16: /*!
Chris@16:  * \file   value_ref_visitation.hpp
Chris@16:  * \author Andrey Semashev
Chris@16:  * \date   28.07.2012
Chris@16:  *
Chris@16:  * \brief  This header is the Boost.Log library implementation, see the library documentation
Chris@16:  *         at http://www.boost.org/doc/libs/release/libs/log/doc/html/index.html. In this file
Chris@16:  *         internal configuration macros are defined.
Chris@16:  */
Chris@16: 
Chris@16: #ifndef BOOST_LOG_DETAIL_VALUE_REF_VISITATION_HPP_INCLUDED_
Chris@16: #define BOOST_LOG_DETAIL_VALUE_REF_VISITATION_HPP_INCLUDED_
Chris@16: 
Chris@16: #include <boost/mpl/at.hpp>
Chris@16: #include <boost/mpl/begin.hpp>
Chris@16: #include <boost/mpl/end.hpp>
Chris@16: #include <boost/mpl/advance.hpp>
Chris@16: #include <boost/mpl/erase.hpp>
Chris@16: #include <boost/mpl/size.hpp>
Chris@16: #include <boost/preprocessor/arithmetic/inc.hpp>
Chris@16: #include <boost/preprocessor/repetition/repeat_from_to.hpp>
Chris@16: #include <boost/preprocessor/iteration/iterate.hpp>
Chris@16: #include <boost/log/detail/config.hpp>
Chris@16: #include <boost/log/detail/header.hpp>
Chris@16: 
Chris@16: #ifndef BOOST_LOG_VALUE_REF_VISITATION_UNROLL_COUNT
Chris@16: #define BOOST_LOG_VALUE_REF_VISITATION_UNROLL_COUNT 8
Chris@16: #endif
Chris@16: 
Chris@16: namespace boost {
Chris@16: 
Chris@16: BOOST_LOG_OPEN_NAMESPACE
Chris@16: 
Chris@16: namespace aux {
Chris@16: 
Chris@16: template< typename SequenceT, typename VisitorT, unsigned int SizeV = mpl::size< SequenceT >::value >
Chris@16: struct apply_visitor_dispatch
Chris@16: {
Chris@16:     typedef typename VisitorT::result_type result_type;
Chris@16: 
Chris@16:     static BOOST_FORCEINLINE result_type call(const void* p, unsigned int type_index, VisitorT& visitor)
Chris@16:     {
Chris@16:         typedef typename mpl::begin< SequenceT >::type begin_type;
Chris@16:         typedef typename mpl::advance_c< begin_type, SizeV / 2u >::type middle_type;
Chris@16:         if (type_index < (SizeV / 2u))
Chris@16:         {
Chris@16:             typedef typename mpl::erase< SequenceT, middle_type, typename mpl::end< SequenceT >::type >::type new_sequence;
Chris@16:             typedef apply_visitor_dispatch< new_sequence, VisitorT > new_dispatch;
Chris@16:             return new_dispatch::call(p, type_index, visitor);
Chris@16:         }
Chris@16:         else
Chris@16:         {
Chris@16:             typedef typename mpl::erase< SequenceT, begin_type, middle_type >::type new_sequence;
Chris@16:             typedef apply_visitor_dispatch< new_sequence, VisitorT > new_dispatch;
Chris@16:             return new_dispatch::call(p, type_index - (SizeV / 2u), visitor);
Chris@16:         }
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: #define BOOST_LOG_AUX_CASE_ENTRY(z, i, data)\
Chris@16:     case i: return visitor(*static_cast< typename mpl::at_c< SequenceT, i >::type const* >(p));
Chris@16: 
Chris@16: #define BOOST_PP_FILENAME_1 <boost/log/detail/value_ref_visitation.hpp>
Chris@16: #define BOOST_PP_ITERATION_LIMITS (1, BOOST_PP_INC(BOOST_LOG_VALUE_REF_VISITATION_VTABLE_SIZE))
Chris@16: #include BOOST_PP_ITERATE()
Chris@16: 
Chris@16: #undef BOOST_LOG_AUX_CASE_ENTRY
Chris@16: 
Chris@16: } // namespace aux
Chris@16: 
Chris@16: BOOST_LOG_CLOSE_NAMESPACE // namespace log
Chris@16: 
Chris@16: } // namespace boost
Chris@16: 
Chris@16: #include <boost/log/detail/footer.hpp>
Chris@16: 
Chris@16: #endif // BOOST_LOG_DETAIL_VALUE_REF_VISITATION_HPP_INCLUDED_
Chris@16: 
Chris@16: #ifdef BOOST_PP_IS_ITERATING
Chris@16: 
Chris@16: #define BOOST_LOG_AUX_SWITCH_SIZE BOOST_PP_ITERATION()
Chris@16: 
Chris@16: template< typename SequenceT, typename VisitorT >
Chris@16: struct apply_visitor_dispatch< SequenceT, VisitorT, BOOST_LOG_AUX_SWITCH_SIZE >
Chris@16: {
Chris@16:     typedef typename VisitorT::result_type result_type;
Chris@16: 
Chris@16:     static BOOST_FORCEINLINE result_type call(const void* p, unsigned int type_index, VisitorT& visitor)
Chris@16:     {
Chris@16:         switch (type_index)
Chris@16:         {
Chris@16:         BOOST_PP_REPEAT_FROM_TO(1, BOOST_LOG_AUX_SWITCH_SIZE, BOOST_LOG_AUX_CASE_ENTRY, ~)
Chris@16:         default:
Chris@16:             return visitor(*static_cast< typename mpl::at_c< SequenceT, 0 >::type const* >(p));
Chris@16:         }
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: #undef BOOST_LOG_AUX_SWITCH_SIZE
Chris@16: 
Chris@16: #endif // BOOST_PP_IS_ITERATING