expr_if.hpp 956 B

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  1. # /* Copyright (C) 2001
  2. # * Housemarque Oy
  3. # * http://www.housemarque.com
  4. # *
  5. # * Distributed under the Boost Software License, Version 1.0. (See
  6. # * accompanying file LICENSE_1_0.txt or copy at
  7. # * http://www.boost.org/LICENSE_1_0.txt)
  8. # */
  9. #
  10. # /* Revised by Paul Mensonides (2002) */
  11. #
  12. # /* See http://www.boost.org for most recent version. */
  13. #
  14. # ifndef BOOST_PREPROCESSOR_CONTROL_EXPR_IF_HPP
  15. # define BOOST_PREPROCESSOR_CONTROL_EXPR_IF_HPP
  16. #
  17. # include <boost/preprocessor/config/config.hpp>
  18. # include <boost/preprocessor/control/expr_iif.hpp>
  19. # include <boost/preprocessor/logical/bool.hpp>
  20. #
  21. # /* BOOST_PP_EXPR_IF */
  22. #
  23. # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
  24. # define BOOST_PP_EXPR_IF(cond, expr) BOOST_PP_EXPR_IIF(BOOST_PP_BOOL(cond), expr)
  25. # else
  26. # define BOOST_PP_EXPR_IF(cond, expr) BOOST_PP_EXPR_IF_I(cond, expr)
  27. # define BOOST_PP_EXPR_IF_I(cond, expr) BOOST_PP_EXPR_IIF(BOOST_PP_BOOL(cond), expr)
  28. # endif
  29. #
  30. # endif