feedc0de/boost_preprocessor
1
0
Fork 0
forked from boostorg/preprocessor
Code Pull Requests Activity

Add ned macro

Browse Source
This commit is contained in:
Edward Diener
2015-05-27 19:15:45 -04:00
parent 2612bf706c
commit 350c0e59b1
1 changed files with 35 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

35
include/boost/preprocessor/seq/detail/is_empty.hpp Normal file
View File

@ -0,0 +1,35 @@
# /* **************************************************************************
# * *
# * (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>
#
/* A empty is one that is just BOOST_PP_SEQ_NIL,
but for out purposes here it is a seq which
does not start with a unary, ie '(anything)' */
#
# 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_NOT_EMPTY(seq) \
BOOST_PP_BOOL(BOOST_PP_DEC(BOOST_PP_SEQ_SIZE(seq (nil)))) \
/**/
#
# endif