[857] | 1 | # /* **************************************************************************
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| 2 | # * *
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| 3 | # * (C) Copyright Paul Mensonides 2003.
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| 4 | # * Distributed under the Boost Software License, Version 1.0. (See
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| 5 | # * accompanying file LICENSE_1_0.txt or copy at
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| 6 | # * http://www.boost.org/LICENSE_1_0.txt)
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| 7 | # * *
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| 8 | # ************************************************************************** */
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| 9 | #
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| 10 | # /* See http://www.boost.org for most recent version. */
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| 11 | #
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| 12 | # ifndef BOOST_PREPROCESSOR_FACILITIES_IS_EMPTY_HPP
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| 13 | # define BOOST_PREPROCESSOR_FACILITIES_IS_EMPTY_HPP
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| 14 | #
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| 15 | # include <boost/preprocessor/config/config.hpp>
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| 16 | # include <boost/preprocessor/cat.hpp>
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| 17 | # include <boost/preprocessor/tuple/elem.hpp>
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| 18 | # include <boost/preprocessor/facilities/empty.hpp>
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| 19 | # include <boost/preprocessor/detail/split.hpp>
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| 20 | #
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| 21 | # /* BOOST_PP_IS_EMPTY */
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| 22 | #
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| 23 | # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_MSVC() && ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_MWCC()
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| 24 | # define BOOST_PP_IS_EMPTY(x) BOOST_PP_IS_EMPTY_I(x BOOST_PP_IS_EMPTY_HELPER)
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| 25 | # define BOOST_PP_IS_EMPTY_I(contents) BOOST_PP_TUPLE_ELEM(2, 1, (BOOST_PP_IS_EMPTY_DEF_ ## contents()))
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| 26 | # define BOOST_PP_IS_EMPTY_DEF_BOOST_PP_IS_EMPTY_HELPER 1, 1 BOOST_PP_EMPTY
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| 27 | # define BOOST_PP_IS_EMPTY_HELPER() , 0
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| 28 | # else
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| 29 | # if BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_MSVC()
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| 30 | # define BOOST_PP_IS_EMPTY(x) BOOST_PP_IS_EMPTY_I(BOOST_PP_IS_EMPTY_HELPER x ())
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| 31 | # 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)))
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| 32 | # define BOOST_PP_IS_EMPTY_II(id) id
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| 33 | # else
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| 34 | # define BOOST_PP_IS_EMPTY(x) BOOST_PP_IS_EMPTY_I((BOOST_PP_IS_EMPTY_HELPER x ()))
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| 35 | # define BOOST_PP_IS_EMPTY_I(par) BOOST_PP_IS_EMPTY_II ## par
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| 36 | # define BOOST_PP_IS_EMPTY_II(test) BOOST_PP_SPLIT(0, BOOST_PP_CAT(BOOST_PP_IS_EMPTY_DEF_, test))
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| 37 | # endif
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| 38 | # define BOOST_PP_IS_EMPTY_HELPER() 1
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| 39 | # define BOOST_PP_IS_EMPTY_DEF_1 1, BOOST_PP_NIL
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| 40 | # define BOOST_PP_IS_EMPTY_DEF_BOOST_PP_IS_EMPTY_HELPER 0, BOOST_PP_NIL
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| 41 | # endif
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| 42 | #
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| 43 | # endif
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