text: # /* **************************************************************************
  #  *                                                                          *
  #  *     (C) Copyright Paul Mensonides 2003.
  #  *     Distributed under the Boost Software License, Version 1.0. (See
  #  *     accompanying file LICENSE_1_0.txt or copy at
  #  *     http://www.boost.org/LICENSE_1_0.txt)
  #  *                                                                          *
  #  ************************************************************************** */
  #
  # /* See http://www.boost.org for most recent version. */
  #
  # ifndef MSGPACK_PREPROCESSOR_FACILITIES_IS_EMPTY_OR_1_HPP
  # define MSGPACK_PREPROCESSOR_FACILITIES_IS_EMPTY_OR_1_HPP
  #
  # include <msgpack/preprocessor/control/iif.hpp>
  # include <msgpack/preprocessor/facilities/empty.hpp>
  # include <msgpack/preprocessor/facilities/identity.hpp>
  # include <msgpack/preprocessor/facilities/is_1.hpp>
  # include <msgpack/preprocessor/facilities/is_empty.hpp>
  #
  # /* MSGPACK_PP_IS_EMPTY_OR_1 */
  #
  # define MSGPACK_PP_IS_EMPTY_OR_1(x) \
      MSGPACK_PP_IIF( \
          MSGPACK_PP_IS_EMPTY(x MSGPACK_PP_EMPTY()), \
          MSGPACK_PP_IDENTITY(1), \
          MSGPACK_PP_IS_1 \
      )(x) \
      /**/
  #
  # endif
  