is_nullary.hpp 1.2 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_DETAIL_IS_NULLARY_HPP
  13. # define BOOST_PREPROCESSOR_DETAIL_IS_NULLARY_HPP
  14. #
  15. # include <boost/preprocessor/config/config.hpp>
  16. # include <boost/preprocessor/detail/check.hpp>
  17. #
  18. # /* BOOST_PP_IS_NULLARY */
  19. #
  20. # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
  21. # define BOOST_PP_IS_NULLARY(x) BOOST_PP_CHECK(x, BOOST_PP_IS_NULLARY_CHECK)
  22. # else
  23. # define BOOST_PP_IS_NULLARY(x) BOOST_PP_IS_NULLARY_I(x)
  24. # define BOOST_PP_IS_NULLARY_I(x) BOOST_PP_CHECK(x, BOOST_PP_IS_NULLARY_CHECK)
  25. # endif
  26. #
  27. # define BOOST_PP_IS_NULLARY_CHECK() 1
  28. # define BOOST_PP_CHECK_RESULT_BOOST_PP_IS_NULLARY_CHECK 0, BOOST_PP_NIL
  29. #
  30. # endif