preprocessor/seq/for_each.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_FOR_EACH_HPP
0013 # define BOOST_PREPROCESSOR_SEQ_FOR_EACH_HPP
0014 #
0015 # include <boost/preprocessor/arithmetic/dec.hpp>
0016 # include <boost/preprocessor/config/config.hpp>
0017 # include <boost/preprocessor/control/if.hpp>
0018 # include <boost/preprocessor/control/iif.hpp>
0019 # include <boost/preprocessor/repetition/for.hpp>
0020 # include <boost/preprocessor/seq/seq.hpp>
0021 # include <boost/preprocessor/seq/size.hpp>
0022 # include <boost/preprocessor/seq/detail/is_empty.hpp>
0023 # include <boost/preprocessor/tuple/elem.hpp>
0024 # include <boost/preprocessor/tuple/rem.hpp>
0025 #
0026 # /* BOOST_PP_SEQ_FOR_EACH */
0027 #
0028 # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
0029 #    define BOOST_PP_SEQ_FOR_EACH(macro, data, seq) BOOST_PP_SEQ_FOR_EACH_DETAIL_CHECK(macro, data, seq)
0030 # else
0031 #    define BOOST_PP_SEQ_FOR_EACH(macro, data, seq) BOOST_PP_SEQ_FOR_EACH_D(macro, data, seq)
0032 #    define BOOST_PP_SEQ_FOR_EACH_D(macro, data, seq) BOOST_PP_SEQ_FOR_EACH_DETAIL_CHECK(macro, data, seq)
0033 # endif
0034 #
0035 #    define BOOST_PP_SEQ_FOR_EACH_DETAIL_CHECK_EXEC(macro, data, seq) BOOST_PP_FOR((macro, data, seq, BOOST_PP_SEQ_SIZE(seq)), BOOST_PP_SEQ_FOR_EACH_P, BOOST_PP_SEQ_FOR_EACH_O, BOOST_PP_SEQ_FOR_EACH_M)
0036 #    define BOOST_PP_SEQ_FOR_EACH_DETAIL_CHECK_EMPTY(macro, data, seq)
0037 #
0038 #    define BOOST_PP_SEQ_FOR_EACH_DETAIL_CHECK(macro, data, seq) \
0039         BOOST_PP_IIF \
0040             ( \
0041             BOOST_PP_SEQ_DETAIL_IS_NOT_EMPTY(seq), \
0042             BOOST_PP_SEQ_FOR_EACH_DETAIL_CHECK_EXEC, \
0043             BOOST_PP_SEQ_FOR_EACH_DETAIL_CHECK_EMPTY \
0044             ) \
0045         (macro, data, seq) \
0046 /**/
0047 #
0048 # define BOOST_PP_SEQ_FOR_EACH_P(r, x) BOOST_PP_TUPLE_ELEM(4, 3, x)
0049 #
0050 # if BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_STRICT()
0051 #    define BOOST_PP_SEQ_FOR_EACH_O(r, x) BOOST_PP_SEQ_FOR_EACH_O_I x
0052 # else
0053 #    define BOOST_PP_SEQ_FOR_EACH_O(r, x) BOOST_PP_SEQ_FOR_EACH_O_I(BOOST_PP_TUPLE_ELEM(4, 0, x), BOOST_PP_TUPLE_ELEM(4, 1, x), BOOST_PP_TUPLE_ELEM(4, 2, x), BOOST_PP_TUPLE_ELEM(4, 3, x))
0054 # endif
0055 #
0056 # define BOOST_PP_SEQ_FOR_EACH_O_I(macro, data, seq, sz) \
0057     BOOST_PP_SEQ_FOR_EACH_O_I_DEC(macro, data, seq, BOOST_PP_DEC(sz)) \
0058 /**/
0059 # define BOOST_PP_SEQ_FOR_EACH_O_I_DEC(macro, data, seq, sz) \
0060     ( \
0061     macro, \
0062     data, \
0063     BOOST_PP_IF \
0064         ( \
0065         sz, \
0066         BOOST_PP_SEQ_FOR_EACH_O_I_TAIL, \
0067         BOOST_PP_SEQ_FOR_EACH_O_I_NIL \
0068         ) \
0069     (seq), \
0070     sz \
0071     ) \
0072 /**/
0073 # define BOOST_PP_SEQ_FOR_EACH_O_I_TAIL(seq) BOOST_PP_SEQ_TAIL(seq)
0074 # define BOOST_PP_SEQ_FOR_EACH_O_I_NIL(seq) BOOST_PP_NIL
0075 #
0076 # if BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_STRICT()
0077 #    define BOOST_PP_SEQ_FOR_EACH_M(r, x) BOOST_PP_SEQ_FOR_EACH_M_IM(r, BOOST_PP_TUPLE_REM_4 x)
0078 #    define BOOST_PP_SEQ_FOR_EACH_M_IM(r, im) BOOST_PP_SEQ_FOR_EACH_M_I(r, im)
0079 # else
0080 #    define BOOST_PP_SEQ_FOR_EACH_M(r, x) BOOST_PP_SEQ_FOR_EACH_M_I(r, BOOST_PP_TUPLE_ELEM(4, 0, x), BOOST_PP_TUPLE_ELEM(4, 1, x), BOOST_PP_TUPLE_ELEM(4, 2, x), BOOST_PP_TUPLE_ELEM(4, 3, x))
0081 # endif
0082 #
0083 # define BOOST_PP_SEQ_FOR_EACH_M_I(r, macro, data, seq, sz) macro(r, data, BOOST_PP_SEQ_HEAD(seq))
0084 #
0085 # /* BOOST_PP_SEQ_FOR_EACH_R */
0086 #
0087 # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
0088 #    define BOOST_PP_SEQ_FOR_EACH_R(r, macro, data, seq) BOOST_PP_SEQ_FOR_EACH_DETAIL_CHECK_R(r, macro, data, seq)
0089 # else
0090 #    define BOOST_PP_SEQ_FOR_EACH_R(r, macro, data, seq) BOOST_PP_SEQ_FOR_EACH_R_I(r, macro, data, seq)
0091 #    define BOOST_PP_SEQ_FOR_EACH_R_I(r, macro, data, seq) BOOST_PP_SEQ_FOR_EACH_DETAIL_CHECK_R(r, macro, data, seq)
0092 # endif
0093 #
0094 #    define BOOST_PP_SEQ_FOR_EACH_DETAIL_CHECK_EXEC_R(r, macro, data, seq) BOOST_PP_FOR_ ## r((macro, data, seq, BOOST_PP_SEQ_SIZE(seq)), BOOST_PP_SEQ_FOR_EACH_P, BOOST_PP_SEQ_FOR_EACH_O, BOOST_PP_SEQ_FOR_EACH_M)
0095 #    define BOOST_PP_SEQ_FOR_EACH_DETAIL_CHECK_EMPTY_R(r, macro, data, seq)
0096 #
0097 #    define BOOST_PP_SEQ_FOR_EACH_DETAIL_CHECK_R(r, macro, data, seq) \
0098         BOOST_PP_IIF \
0099             ( \
0100             BOOST_PP_SEQ_DETAIL_IS_NOT_EMPTY(seq), \
0101             BOOST_PP_SEQ_FOR_EACH_DETAIL_CHECK_EXEC_R, \
0102             BOOST_PP_SEQ_FOR_EACH_DETAIL_CHECK_EMPTY_R \
0103             ) \
0104         (r, macro, data, seq) \
0105 /**/
0106 #
0107 # endif