preprocessor/seq/seq.hpp

0001 # /* **************************************************************************
0002 #  *                                                                          *
0003 #  *     (C) Copyright Paul Mensonides 2002.
0004 #  *     Distributed under the Boost Software License, Version 1.0. (See
0005 #  *     accompanying file LICENSE_1_0.txt or copy at
0006 #  *     http://www.boost.org/LICENSE_1_0.txt)
0007 #  *                                                                          *
0008 #  ************************************************************************** */
0009 #
0010 # /* See http://www.boost.org for most recent version. */
0011 #
0012 # ifndef BOOST_PREPROCESSOR_SEQ_SEQ_HPP
0013 # define BOOST_PREPROCESSOR_SEQ_SEQ_HPP
0014 #
0015 # include <boost/preprocessor/config/config.hpp>
0016 # include <boost/preprocessor/seq/elem.hpp>
0017 #
0018 # /* BOOST_PP_SEQ_HEAD */
0019 #
0020 # define BOOST_PP_SEQ_HEAD(seq) BOOST_PP_SEQ_ELEM(0, seq)
0021 #
0022 # /* BOOST_PP_SEQ_TAIL */
0023 #
0024 # if BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_MWCC()
0025 #    define BOOST_PP_SEQ_TAIL(seq) BOOST_PP_SEQ_TAIL_1((seq))
0026 #    define BOOST_PP_SEQ_TAIL_1(par) BOOST_PP_SEQ_TAIL_2 ## par
0027 #    define BOOST_PP_SEQ_TAIL_2(seq) BOOST_PP_SEQ_TAIL_I ## seq
0028 # elif BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_MSVC()
0029 #    define BOOST_PP_SEQ_TAIL(seq) BOOST_PP_SEQ_TAIL_ID(BOOST_PP_SEQ_TAIL_I seq)
0030 #    define BOOST_PP_SEQ_TAIL_ID(id) id
0031 # elif BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
0032 #    define BOOST_PP_SEQ_TAIL(seq) BOOST_PP_SEQ_TAIL_D(seq)
0033 #    define BOOST_PP_SEQ_TAIL_D(seq) BOOST_PP_SEQ_TAIL_I seq
0034 # else
0035 #    define BOOST_PP_SEQ_TAIL(seq) BOOST_PP_SEQ_TAIL_I seq
0036 # endif
0037 #
0038 # define BOOST_PP_SEQ_TAIL_I(x)
0039 #
0040 # /* BOOST_PP_SEQ_NIL */
0041 #
0042 # define BOOST_PP_SEQ_NIL(x) (x)
0043 #
0044 # endif