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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