binary_seq_to_args.hpp 2.6 KB

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  1. // Copyright Cromwell D. Enage 2017.
  2. // Distributed under the Boost Software License, Version 1.0.
  3. // (See accompanying file LICENSE_1_0.txt or copy at
  4. // http://www.boost.org/LICENSE_1_0.txt)
  5. #ifndef BOOST_PARAMETER_AUX_PREPROCESSOR_BINARY_SEQ_TO_ARGS_HPP
  6. #define BOOST_PARAMETER_AUX_PREPROCESSOR_BINARY_SEQ_TO_ARGS_HPP
  7. #include <boost/preprocessor/seq/elem.hpp>
  8. #include <boost/preprocessor/cat.hpp>
  9. #define BOOST_PARAMETER_AUX_PP_BINARY_SEQ_TO_ARG_0_1(n, prefix_seq) \
  10. BOOST_PP_CAT(BOOST_PP_SEQ_ELEM(0, prefix_seq), n) const&
  11. /**/
  12. #define BOOST_PARAMETER_AUX_PP_BINARY_SEQ_TO_ARG_1_1(n, prefix_seq) \
  13. BOOST_PP_CAT(BOOST_PP_SEQ_ELEM(0, prefix_seq), n)&
  14. /**/
  15. #define BOOST_PARAMETER_AUX_PP_BINARY_SEQ_TO_ARG_0_2(n, prefix_seq) \
  16. BOOST_PARAMETER_AUX_PP_BINARY_SEQ_TO_ARG_0_1(n, prefix_seq) \
  17. BOOST_PP_CAT(BOOST_PP_SEQ_ELEM(1, prefix_seq), n)
  18. /**/
  19. #define BOOST_PARAMETER_AUX_PP_BINARY_SEQ_TO_ARG_1_2(n, prefix_seq) \
  20. BOOST_PARAMETER_AUX_PP_BINARY_SEQ_TO_ARG_1_1(n, prefix_seq) \
  21. BOOST_PP_CAT(BOOST_PP_SEQ_ELEM(1, prefix_seq), n)
  22. /**/
  23. #include <boost/preprocessor/seq/size.hpp>
  24. #define BOOST_PARAMETER_AUX_PP_BINARY_SEQ_TO_ARG_0(prefix_seq) \
  25. BOOST_PP_CAT( \
  26. BOOST_PARAMETER_AUX_PP_BINARY_SEQ_TO_ARG_0_ \
  27. , BOOST_PP_SEQ_SIZE(prefix_seq) \
  28. )
  29. /**/
  30. #define BOOST_PARAMETER_AUX_PP_BINARY_SEQ_TO_ARG_1(prefix_seq) \
  31. BOOST_PP_CAT( \
  32. BOOST_PARAMETER_AUX_PP_BINARY_SEQ_TO_ARG_1_ \
  33. , BOOST_PP_SEQ_SIZE(prefix_seq) \
  34. )
  35. /**/
  36. #include <boost/parameter/aux_/preprocessor/convert_binary_seq.hpp>
  37. // This macro converts the specified Boost.Preprocessor sequence of 1s and 0s
  38. // into a formal function parameter list.
  39. //
  40. // Example:
  41. // BOOST_PARAMETER_AUX_PP_BINARY_SEQ_TO_ARGS((1)(0)(1)(0), (P)(p))
  42. // expands to
  43. // P0 & p0, P1 const& p1, P2 & p2, P3 const& p3
  44. #define BOOST_PARAMETER_AUX_PP_BINARY_SEQ_TO_ARGS(binary_seq, prefix_seq) \
  45. BOOST_PARAMETER_AUX_PP_CONVERT_BINARY_SEQ( \
  46. binary_seq \
  47. , BOOST_PARAMETER_AUX_PP_BINARY_SEQ_TO_ARG_0(prefix_seq) \
  48. , BOOST_PARAMETER_AUX_PP_BINARY_SEQ_TO_ARG_1(prefix_seq) \
  49. , prefix_seq \
  50. )
  51. /**/
  52. #endif // include guard