Chris@102: # /* **************************************************************************
Chris@102: #  *                                                                          *
Chris@102: #  *     (C) Copyright Edward Diener 2013.
Chris@102: #  *     Distributed under the Boost Software License, Version 1.0. (See
Chris@102: #  *     accompanying file LICENSE_1_0.txt or copy at
Chris@102: #  *     http://www.boost.org/LICENSE_1_0.txt)
Chris@102: #  *                                                                          *
Chris@102: #  ************************************************************************** */
Chris@102: #
Chris@102: # /* See http://www.boost.org for most recent version. */
Chris@102: #
Chris@102: # ifndef BOOST_PREPROCESSOR_TUPLE_POP_BACK_HPP
Chris@102: # define BOOST_PREPROCESSOR_TUPLE_POP_BACK_HPP
Chris@102: #
Chris@102: # include <boost/preprocessor/config/config.hpp>
Chris@102: #
Chris@102: # if BOOST_PP_VARIADICS
Chris@102: #
Chris@102: # include <boost/preprocessor/array/pop_back.hpp>
Chris@102: # include <boost/preprocessor/array/to_tuple.hpp>
Chris@102: # include <boost/preprocessor/comparison/greater.hpp>
Chris@102: # include <boost/preprocessor/control/iif.hpp>
Chris@102: # include <boost/preprocessor/tuple/size.hpp>
Chris@102: # include <boost/preprocessor/tuple/to_array.hpp>
Chris@102: #
Chris@102: # /* BOOST_PP_TUPLE_POP_BACK */
Chris@102: #
Chris@102: # define BOOST_PP_TUPLE_POP_BACK(tuple) \
Chris@102: 	BOOST_PP_IIF \
Chris@102: 		( \
Chris@102: 		BOOST_PP_GREATER(BOOST_PP_TUPLE_SIZE(tuple),1), \
Chris@102: 		BOOST_PP_TUPLE_POP_BACK_EXEC, \
Chris@102: 		BOOST_PP_TUPLE_POP_BACK_RETURN \
Chris@102: 		) \
Chris@102: 	(tuple) \
Chris@102: /**/
Chris@102: #
Chris@102: # define BOOST_PP_TUPLE_POP_BACK_EXEC(tuple) \
Chris@102: 	BOOST_PP_ARRAY_TO_TUPLE(BOOST_PP_ARRAY_POP_BACK(BOOST_PP_TUPLE_TO_ARRAY(tuple))) \
Chris@102: /**/
Chris@102: #
Chris@102: # define BOOST_PP_TUPLE_POP_BACK_RETURN(tuple) tuple
Chris@102: #
Chris@102: # /* BOOST_PP_TUPLE_POP_BACK_Z */
Chris@102: #
Chris@102: # define BOOST_PP_TUPLE_POP_BACK_Z(z, tuple) \
Chris@102: 	BOOST_PP_IIF \
Chris@102: 		( \
Chris@102: 		BOOST_PP_GREATER(BOOST_PP_TUPLE_SIZE(tuple),1), \
Chris@102: 		BOOST_PP_TUPLE_POP_BACK_Z_EXEC, \
Chris@102: 		BOOST_PP_TUPLE_POP_BACK_Z_RETURN \
Chris@102: 		) \
Chris@102: 	(z, tuple) \
Chris@102: /**/
Chris@102: #
Chris@102: # define BOOST_PP_TUPLE_POP_BACK_Z_EXEC(z, tuple) \
Chris@102: 	BOOST_PP_ARRAY_TO_TUPLE(BOOST_PP_ARRAY_POP_BACK_Z(z, BOOST_PP_TUPLE_TO_ARRAY(tuple))) \
Chris@102: /**/
Chris@102: #
Chris@102: # define BOOST_PP_TUPLE_POP_BACK_Z_RETURN(z, tuple) tuple
Chris@102: #
Chris@102: # endif // BOOST_PP_VARIADICS
Chris@102: #
Chris@102: # endif // BOOST_PREPROCESSOR_TUPLE_POP_BACK_HPP