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