paren_if.hpp 1.6 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_PUNCTUATION_PAREN_IF_HPP
  13. # define BOOST_PREPROCESSOR_PUNCTUATION_PAREN_IF_HPP
  14. #
  15. # include <boost/preprocessor/config/config.hpp>
  16. # include <boost/preprocessor/control/if.hpp>
  17. # include <boost/preprocessor/facilities/empty.hpp>
  18. # include <boost/preprocessor/punctuation/paren.hpp>
  19. #
  20. # /* BOOST_PP_LPAREN_IF */
  21. #
  22. # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
  23. # define BOOST_PP_LPAREN_IF(cond) BOOST_PP_IF(cond, BOOST_PP_LPAREN, BOOST_PP_EMPTY)()
  24. # else
  25. # define BOOST_PP_LPAREN_IF(cond) BOOST_PP_LPAREN_IF_I(cond)
  26. # define BOOST_PP_LPAREN_IF_I(cond) BOOST_PP_IF(cond, BOOST_PP_LPAREN, BOOST_PP_EMPTY)()
  27. # endif
  28. #
  29. # /* BOOST_PP_RPAREN_IF */
  30. #
  31. # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
  32. # define BOOST_PP_RPAREN_IF(cond) BOOST_PP_IF(cond, BOOST_PP_RPAREN, BOOST_PP_EMPTY)()
  33. # else
  34. # define BOOST_PP_RPAREN_IF(cond) BOOST_PP_RPAREN_IF_I(cond)
  35. # define BOOST_PP_RPAREN_IF_I(cond) BOOST_PP_IF(cond, BOOST_PP_RPAREN, BOOST_PP_EMPTY)()
  36. # endif
  37. #
  38. # endif