ceph/src/boost/boost/preprocessor/tuple/size.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_TUPLE_SIZE_HPP
  14 # define BOOST_PREPROCESSOR_TUPLE_SIZE_HPP
  15 #
  16 # include <boost/preprocessor/cat.hpp>
  17 # include <boost/preprocessor/config/config.hpp>
  18 # include <boost/preprocessor/control/if.hpp>
  19 # include <boost/preprocessor/variadic/has_opt.hpp>
  20 # include <boost/preprocessor/variadic/size.hpp>
  21 #
  22 # if BOOST_PP_VARIADIC_HAS_OPT()
  23 #     if BOOST_PP_VARIADICS_MSVC
  24 #         define BOOST_PP_TUPLE_SIZE(tuple) BOOST_PP_TUPLE_SIZE_CHECK(BOOST_PP_CAT(BOOST_PP_VARIADIC_SIZE tuple,))
  25 #     else
  26 #         define BOOST_PP_TUPLE_SIZE(tuple) BOOST_PP_TUPLE_SIZE_CHECK(BOOST_PP_VARIADIC_SIZE tuple)
  27 #     endif
  28 #     define BOOST_PP_TUPLE_SIZE_CHECK(size) BOOST_PP_IF(size,size,1)
  29 # elif BOOST_PP_VARIADICS_MSVC
  30 #     define BOOST_PP_TUPLE_SIZE(tuple) BOOST_PP_CAT(BOOST_PP_VARIADIC_SIZE tuple,)
  31 # else
  32 #     define BOOST_PP_TUPLE_SIZE(tuple) BOOST_PP_VARIADIC_SIZE tuple
  33 # endif
  34 #
  35 # endif