has_opt.hpp 1.4 KB

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  1. # /* **************************************************************************
  2. # * *
  3. # * (C) Copyright Edward Diener 2019. *
  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_VARIADIC_HAS_OPT_HPP
  13. # define BOOST_PREPROCESSOR_VARIADIC_HAS_OPT_HPP
  14. #
  15. # include <boost/preprocessor/config/config.hpp>
  16. #
  17. # /* BOOST_PP_VARIADIC_HAS_OPT */
  18. #
  19. # if defined(__cplusplus) && __cplusplus > 201703L
  20. # if defined(__GNUC__) && !defined(__clang__) && __GNUC__ >= 8 && __GNUC__ < 10
  21. # define BOOST_PP_VARIADIC_HAS_OPT() 0
  22. # elif defined(__clang__) && __clang_major__ < 9
  23. # define BOOST_PP_VARIADIC_HAS_OPT() 0
  24. # else
  25. # include <boost/preprocessor/variadic/detail/has_opt.hpp>
  26. # define BOOST_PP_VARIADIC_HAS_OPT() \
  27. BOOST_PP_VARIADIC_HAS_OPT_ELEM2(BOOST_PP_VARIADIC_HAS_OPT_FUNCTION(?),) \
  28. /**/
  29. # endif
  30. # else
  31. # define BOOST_PP_VARIADIC_HAS_OPT() 0
  32. # endif
  33. #
  34. # endif