for_each.hpp 4.6 KB

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  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