boost/preprocessor/seq/for_each.hpp

   1 # /* **************************************************************************
   2 #  *                                                                          *
   3 #  *     (C) Copyright Paul Mensonides 2002.
   4 #  *     Distributed under the Boost Software License, Version 1.0. (See
   5 #  *     accompanying file LICENSE_1_0.txt or copy at
   6 #  *     http://www.boost.org/LICENSE_1_0.txt)
   7 #  *                                                                          *
   8 #  ************************************************************************** */
   9 #
  10 # /* See http://www.boost.org for most recent version. */
  11 #
  12 # ifndef BOOST_PREPROCESSOR_SEQ_FOR_EACH_HPP
  13 # define BOOST_PREPROCESSOR_SEQ_FOR_EACH_HPP
  14 #
  15 # include <boost/preprocessor/arithmetic/dec.hpp>
  16 # include <boost/preprocessor/config/config.hpp>
  17 # include <boost/preprocessor/control/if.hpp>
  18 # include <boost/preprocessor/control/iif.hpp>
  19 # include <boost/preprocessor/repetition/for.hpp>
  20 # include <boost/preprocessor/seq/seq.hpp>
  21 # include <boost/preprocessor/seq/size.hpp>
  22 # include <boost/preprocessor/seq/detail/is_empty.hpp>
  23 # include <boost/preprocessor/tuple/elem.hpp>
  24 # include <boost/preprocessor/tuple/rem.hpp>
  25 #
  26 # /* BOOST_PP_SEQ_FOR_EACH */
  27 #
  28 # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
  29 #    define BOOST_PP_SEQ_FOR_EACH(macro, data, seq) BOOST_PP_SEQ_FOR_EACH_DETAIL_CHECK(macro, data, seq)
  30 # else
  31 #    define BOOST_PP_SEQ_FOR_EACH(macro, data, seq) BOOST_PP_SEQ_FOR_EACH_D(macro, data, seq)
  32 #    define BOOST_PP_SEQ_FOR_EACH_D(macro, data, seq) BOOST_PP_SEQ_FOR_EACH_DETAIL_CHECK(macro, data, seq)
  33 # endif
  34 #
  35 #    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)
  36 #    define BOOST_PP_SEQ_FOR_EACH_DETAIL_CHECK_EMPTY(macro, data, seq)
  37 #
  38 #    define BOOST_PP_SEQ_FOR_EACH_DETAIL_CHECK(macro, data, seq) \
  39         BOOST_PP_IIF \
  40             ( \
  41             BOOST_PP_SEQ_DETAIL_IS_NOT_EMPTY(seq), \
  42             BOOST_PP_SEQ_FOR_EACH_DETAIL_CHECK_EXEC, \
  43             BOOST_PP_SEQ_FOR_EACH_DETAIL_CHECK_EMPTY \
  44             ) \
  45         (macro, data, seq) \
  46 /**/
  47 #
  48 # define BOOST_PP_SEQ_FOR_EACH_P(r, x) BOOST_PP_TUPLE_ELEM(4, 3, x)
  49 #
  50 # if BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_STRICT()
  51 #    define BOOST_PP_SEQ_FOR_EACH_O(r, x) BOOST_PP_SEQ_FOR_EACH_O_I x
  52 # else
  53 #    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))
  54 # endif
  55 #
  56 # define BOOST_PP_SEQ_FOR_EACH_O_I(macro, data, seq, sz) \
  57     BOOST_PP_SEQ_FOR_EACH_O_I_DEC(macro, data, seq, BOOST_PP_DEC(sz)) \
  58 /**/
  59 # define BOOST_PP_SEQ_FOR_EACH_O_I_DEC(macro, data, seq, sz) \
  60     ( \
  61     macro, \
  62     data, \
  63     BOOST_PP_IF \
  64         ( \
  65         sz, \
  66         BOOST_PP_SEQ_FOR_EACH_O_I_TAIL, \
  67         BOOST_PP_SEQ_FOR_EACH_O_I_NIL \
  68         ) \
  69     (seq), \
  70     sz \
  71     ) \
  72 /**/
  73 # define BOOST_PP_SEQ_FOR_EACH_O_I_TAIL(seq) BOOST_PP_SEQ_TAIL(seq)
  74 # define BOOST_PP_SEQ_FOR_EACH_O_I_NIL(seq) BOOST_PP_NIL
  75 #
  76 # if BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_STRICT()
  77 #    define BOOST_PP_SEQ_FOR_EACH_M(r, x) BOOST_PP_SEQ_FOR_EACH_M_IM(r, BOOST_PP_TUPLE_REM_4 x)
  78 #    define BOOST_PP_SEQ_FOR_EACH_M_IM(r, im) BOOST_PP_SEQ_FOR_EACH_M_I(r, im)
  79 # else
  80 #    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))
  81 # endif
  82 #
  83 # define BOOST_PP_SEQ_FOR_EACH_M_I(r, macro, data, seq, sz) macro(r, data, BOOST_PP_SEQ_HEAD(seq))
  84 #
  85 # /* BOOST_PP_SEQ_FOR_EACH_R */
  86 #
  87 # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
  88 #    define BOOST_PP_SEQ_FOR_EACH_R(r, macro, data, seq) BOOST_PP_SEQ_FOR_EACH_DETAIL_CHECK_R(r, macro, data, seq)
  89 # else
  90 #    define BOOST_PP_SEQ_FOR_EACH_R(r, macro, data, seq) BOOST_PP_SEQ_FOR_EACH_R_I(r, macro, data, seq)
  91 #    define BOOST_PP_SEQ_FOR_EACH_R_I(r, macro, data, seq) BOOST_PP_SEQ_FOR_EACH_DETAIL_CHECK_R(r, macro, data, seq)
  92 # endif
  93 #
  94 #    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)
  95 #    define BOOST_PP_SEQ_FOR_EACH_DETAIL_CHECK_EMPTY_R(r, macro, data, seq)
  96 #
  97 #    define BOOST_PP_SEQ_FOR_EACH_DETAIL_CHECK_R(r, macro, data, seq) \
  98         BOOST_PP_IIF \
  99             ( \
 100             BOOST_PP_SEQ_DETAIL_IS_NOT_EMPTY(seq), \
 101             BOOST_PP_SEQ_FOR_EACH_DETAIL_CHECK_EXEC_R, \
 102             BOOST_PP_SEQ_FOR_EACH_DETAIL_CHECK_EMPTY_R \
 103             ) \
 104         (r, macro, data, seq) \
 105 /**/
 106 #
 107 # endif