Chris@16: # /* **************************************************************************
Chris@16: #  *                                                                          *
Chris@16: #  *     (C) Copyright Paul Mensonides 2003.
Chris@101: #  *     (C) Copyright Edward Diener 2014.
Chris@16: #  *     Distributed under the Boost Software License, Version 1.0. (See
Chris@16: #  *     accompanying file LICENSE_1_0.txt or copy at
Chris@16: #  *     http://www.boost.org/LICENSE_1_0.txt)
Chris@16: #  *                                                                          *
Chris@16: #  ************************************************************************** */
Chris@16: #
Chris@16: # /* See http://www.boost.org for most recent version. */
Chris@16: #
Chris@16: # ifndef BOOST_PREPROCESSOR_FACILITIES_IS_EMPTY_HPP
Chris@16: # define BOOST_PREPROCESSOR_FACILITIES_IS_EMPTY_HPP
Chris@16: #
Chris@16: # include <boost/preprocessor/config/config.hpp>
Chris@101: #
Chris@101: # if BOOST_PP_VARIADICS
Chris@101: #
Chris@101: # include <boost/preprocessor/facilities/is_empty_variadic.hpp>
Chris@101: #
Chris@101: # else
Chris@101: #
Chris@101: # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_MSVC() && ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_MWCC()
Chris@101: # include <boost/preprocessor/tuple/elem.hpp>
Chris@101: # include <boost/preprocessor/facilities/identity.hpp>
Chris@101: # else
Chris@16: # include <boost/preprocessor/cat.hpp>
Chris@16: # include <boost/preprocessor/detail/split.hpp>
Chris@101: # endif
Chris@16: #
Chris@16: # /* BOOST_PP_IS_EMPTY */
Chris@16: #
Chris@16: # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_MSVC() && ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_MWCC()
Chris@16: #    define BOOST_PP_IS_EMPTY(x) BOOST_PP_IS_EMPTY_I(x BOOST_PP_IS_EMPTY_HELPER)
Chris@16: #    define BOOST_PP_IS_EMPTY_I(contents) BOOST_PP_TUPLE_ELEM(2, 1, (BOOST_PP_IS_EMPTY_DEF_ ## contents()))
Chris@101: #    define BOOST_PP_IS_EMPTY_DEF_BOOST_PP_IS_EMPTY_HELPER 1, BOOST_PP_IDENTITY(1)
Chris@16: #    define BOOST_PP_IS_EMPTY_HELPER() , 0
Chris@16: # else
Chris@16: #    if BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_MSVC()
Chris@16: #        define BOOST_PP_IS_EMPTY(x) BOOST_PP_IS_EMPTY_I(BOOST_PP_IS_EMPTY_HELPER x ())
Chris@16: #        define BOOST_PP_IS_EMPTY_I(test) BOOST_PP_IS_EMPTY_II(BOOST_PP_SPLIT(0, BOOST_PP_CAT(BOOST_PP_IS_EMPTY_DEF_, test)))
Chris@16: #        define BOOST_PP_IS_EMPTY_II(id) id
Chris@16: #    else
Chris@16: #        define BOOST_PP_IS_EMPTY(x) BOOST_PP_IS_EMPTY_I((BOOST_PP_IS_EMPTY_HELPER x ()))
Chris@16: #        define BOOST_PP_IS_EMPTY_I(par) BOOST_PP_IS_EMPTY_II ## par
Chris@16: #        define BOOST_PP_IS_EMPTY_II(test) BOOST_PP_SPLIT(0, BOOST_PP_CAT(BOOST_PP_IS_EMPTY_DEF_, test))
Chris@16: #    endif
Chris@16: #    define BOOST_PP_IS_EMPTY_HELPER() 1
Chris@16: #    define BOOST_PP_IS_EMPTY_DEF_1 1, BOOST_PP_NIL
Chris@16: #    define BOOST_PP_IS_EMPTY_DEF_BOOST_PP_IS_EMPTY_HELPER 0, BOOST_PP_NIL
Chris@16: # endif
Chris@16: #
Chris@101: # endif /* BOOST_PP_VARIADICS */
Chris@101: #
Chris@101: # endif /* BOOST_PREPROCESSOR_FACILITIES_IS_EMPTY_HPP */