contrib/src/boost/preprocessor/seq/detail/is_empty.hpp


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# /* **************************************************************************

#  *                                                                          *

#  *     (C) Copyright Edward Diener 2015.

#  *     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 for most recent version. */

#

# ifndef BOOST_PREPROCESSOR_SEQ_DETAIL_IS_EMPTY_HPP

# define BOOST_PREPROCESSOR_SEQ_DETAIL_IS_EMPTY_HPP

#

# include <boost/preprocessor/config/config.hpp>

# include <boost/preprocessor/arithmetic/dec.hpp>

# include <boost/preprocessor/logical/bool.hpp>

# include <boost/preprocessor/logical/compl.hpp>

# include <boost/preprocessor/seq/size.hpp>

#

/* An empty seq is one that is just BOOST_PP_SEQ_NIL */
#

# define BOOST_PP_SEQ_DETAIL_IS_EMPTY(seq) \

	BOOST_PP_COMPL \
		( \
		BOOST_PP_SEQ_DETAIL_IS_NOT_EMPTY(seq) \
		) \
/**/
#

# define BOOST_PP_SEQ_DETAIL_IS_EMPTY_SIZE(size) \

	BOOST_PP_COMPL \
		( \
		BOOST_PP_SEQ_DETAIL_IS_NOT_EMPTY_SIZE(size) \
		) \
/**/
#

# define BOOST_PP_SEQ_DETAIL_IS_NOT_EMPTY(seq) \

	BOOST_PP_SEQ_DETAIL_IS_NOT_EMPTY_SIZE(BOOST_PP_SEQ_DETAIL_EMPTY_SIZE(seq)) \
/**/
#

# define BOOST_PP_SEQ_DETAIL_IS_NOT_EMPTY_SIZE(size) \

	BOOST_PP_BOOL(size) \
/**/
#

# define BOOST_PP_SEQ_DETAIL_EMPTY_SIZE(seq) \

	BOOST_PP_DEC(BOOST_PP_SEQ_SIZE(seq (nil))) \
/**/
#

# endif