remove.hpp 2.0 KB

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  1. # /* **************************************************************************
  2. # * *
  3. # * (C) Copyright Edward Diener 2013.
  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_TUPLE_REMOVE_HPP
  13. # define BOOST_PREPROCESSOR_TUPLE_REMOVE_HPP
  14. #
  15. # include <boost/preprocessor/config/config.hpp>
  16. #
  17. # if BOOST_PP_VARIADICS
  18. #
  19. # include <boost/preprocessor/array/remove.hpp>
  20. # include <boost/preprocessor/array/to_tuple.hpp>
  21. # include <boost/preprocessor/comparison/greater.hpp>
  22. # include <boost/preprocessor/control/iif.hpp>
  23. # include <boost/preprocessor/tuple/size.hpp>
  24. # include <boost/preprocessor/tuple/to_array.hpp>
  25. #
  26. # /* BOOST_PP_TUPLE_REMOVE */
  27. #
  28. # define BOOST_PP_TUPLE_REMOVE(tuple, i) \
  29. BOOST_PP_IIF \
  30. ( \
  31. BOOST_PP_GREATER(BOOST_PP_TUPLE_SIZE(tuple),1), \
  32. BOOST_PP_TUPLE_REMOVE_EXEC, \
  33. BOOST_PP_TUPLE_REMOVE_RETURN \
  34. ) \
  35. (tuple, i) \
  36. /**/
  37. #
  38. # define BOOST_PP_TUPLE_REMOVE_EXEC(tuple, i) \
  39. BOOST_PP_ARRAY_TO_TUPLE(BOOST_PP_ARRAY_REMOVE(BOOST_PP_TUPLE_TO_ARRAY(tuple), i)) \
  40. /**/
  41. #
  42. # define BOOST_PP_TUPLE_REMOVE_RETURN(tuple, i) tuple
  43. #
  44. # /* BOOST_PP_TUPLE_REMOVE_D */
  45. #
  46. # define BOOST_PP_TUPLE_REMOVE_D(d, tuple, i) \
  47. BOOST_PP_IIF \
  48. ( \
  49. BOOST_PP_GREATER_D(d, BOOST_PP_TUPLE_SIZE(tuple), 1), \
  50. BOOST_PP_TUPLE_REMOVE_D_EXEC, \
  51. BOOST_PP_TUPLE_REMOVE_D_RETURN \
  52. ) \
  53. (d, tuple, i) \
  54. /**/
  55. #
  56. # define BOOST_PP_TUPLE_REMOVE_D_EXEC(d, tuple, i) \
  57. BOOST_PP_ARRAY_TO_TUPLE(BOOST_PP_ARRAY_REMOVE_D(d, BOOST_PP_TUPLE_TO_ARRAY(tuple), i)) \
  58. /**/
  59. #
  60. # define BOOST_PP_TUPLE_REMOVE_D_RETURN(d, tuple, i) tuple
  61. #
  62. # endif // BOOST_PP_VARIADICS
  63. #
  64. # endif // BOOST_PREPROCESSOR_TUPLE_REMOVE_HPP