ceph/src/boost/boost/preprocessor/variadic/to_list.hpp

   1 # /* **************************************************************************
   2 #  *                                                                          *
   3 #  *     (C) Copyright Edward Diener 2011.                                    *
   4 #  *     (C) Copyright Paul Mensonides 2011.                                  *
   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 #
  11 # /* See http://www.boost.org for most recent version. */
  12 #
  13 # ifndef BOOST_PREPROCESSOR_VARIADIC_TO_LIST_HPP
  14 # define BOOST_PREPROCESSOR_VARIADIC_TO_LIST_HPP
  15 #
  16 # include <boost/preprocessor/config/config.hpp>
  17 # include <boost/preprocessor/control/if.hpp>
  18 # include <boost/preprocessor/tuple/to_list.hpp>
  19 # include <boost/preprocessor/variadic/has_opt.hpp>
  20 # include <boost/preprocessor/variadic/size.hpp>
  21 #
  22 # /* BOOST_PP_VARIADIC_TO_LIST */
  23 #
  24 # if BOOST_PP_VARIADIC_HAS_OPT()
  25 #     define BOOST_PP_VARIADIC_TO_LIST_NOT_EMPTY(...) BOOST_PP_TUPLE_TO_LIST((__VA_ARGS__))
  26 #     define BOOST_PP_VARIADIC_TO_LIST_EMPTY(...) BOOST_PP_NIL
  27 #     define BOOST_PP_VARIADIC_TO_LIST(...) BOOST_PP_IF(BOOST_PP_VARIADIC_SIZE(__VA_ARGS__),BOOST_PP_VARIADIC_TO_LIST_NOT_EMPTY,BOOST_PP_VARIADIC_TO_LIST_EMPTY)(__VA_ARGS__)
  28 # else
  29 #     define BOOST_PP_VARIADIC_TO_LIST(...) BOOST_PP_TUPLE_TO_LIST((__VA_ARGS__))
  30 # endif
  31 #
  32 # endif