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1 | # /* ************************************************************************** |
2 | # * * | |
3 | # * (C) Copyright Paul Mensonides 2003. | |
4 | # * (C) Copyright Edward Diener 2014. | |
5 | # * Distributed under the Boost Software License, Version 1.0. (See | |
6 | # * accompanying file LICENSE_1_0.txt or copy at | |
7 | # * http://www.boost.org/LICENSE_1_0.txt) | |
8 | # * * | |
9 | # ************************************************************************** */ | |
10 | # | |
11 | # /* See http://www.boost.org for most recent version. */ | |
12 | # | |
13 | # ifndef BOOST_PREPROCESSOR_FACILITIES_IS_EMPTY_HPP | |
14 | # define BOOST_PREPROCESSOR_FACILITIES_IS_EMPTY_HPP | |
15 | # | |
16 | # include <boost/preprocessor/config/config.hpp> | |
17 | # | |
18 | # if BOOST_PP_VARIADICS | |
19 | # | |
20 | # include <boost/preprocessor/facilities/is_empty_variadic.hpp> | |
21 | # | |
22 | # else | |
23 | # | |
24 | # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_MSVC() && ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_MWCC() | |
25 | # include <boost/preprocessor/tuple/elem.hpp> | |
26 | # include <boost/preprocessor/facilities/identity.hpp> | |
27 | # else | |
28 | # include <boost/preprocessor/cat.hpp> | |
29 | # include <boost/preprocessor/detail/split.hpp> | |
30 | # endif | |
31 | # | |
32 | # /* BOOST_PP_IS_EMPTY */ | |
33 | # | |
34 | # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_MSVC() && ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_MWCC() | |
35 | # define BOOST_PP_IS_EMPTY(x) BOOST_PP_IS_EMPTY_I(x BOOST_PP_IS_EMPTY_HELPER) | |
36 | # define BOOST_PP_IS_EMPTY_I(contents) BOOST_PP_TUPLE_ELEM(2, 1, (BOOST_PP_IS_EMPTY_DEF_ ## contents())) | |
37 | # define BOOST_PP_IS_EMPTY_DEF_BOOST_PP_IS_EMPTY_HELPER 1, BOOST_PP_IDENTITY(1) | |
38 | # define BOOST_PP_IS_EMPTY_HELPER() , 0 | |
39 | # else | |
40 | # if BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_MSVC() | |
41 | # define BOOST_PP_IS_EMPTY(x) BOOST_PP_IS_EMPTY_I(BOOST_PP_IS_EMPTY_HELPER x ()) | |
42 | # 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))) | |
43 | # define BOOST_PP_IS_EMPTY_II(id) id | |
44 | # else | |
45 | # define BOOST_PP_IS_EMPTY(x) BOOST_PP_IS_EMPTY_I((BOOST_PP_IS_EMPTY_HELPER x ())) | |
46 | # define BOOST_PP_IS_EMPTY_I(par) BOOST_PP_IS_EMPTY_II ## par | |
47 | # define BOOST_PP_IS_EMPTY_II(test) BOOST_PP_SPLIT(0, BOOST_PP_CAT(BOOST_PP_IS_EMPTY_DEF_, test)) | |
48 | # endif | |
49 | # define BOOST_PP_IS_EMPTY_HELPER() 1 | |
50 | # define BOOST_PP_IS_EMPTY_DEF_1 1, BOOST_PP_NIL | |
51 | # define BOOST_PP_IS_EMPTY_DEF_BOOST_PP_IS_EMPTY_HELPER 0, BOOST_PP_NIL | |
52 | # endif | |
53 | # | |
54 | # endif /* BOOST_PP_VARIADICS */ | |
55 | # | |
56 | # endif /* BOOST_PREPROCESSOR_FACILITIES_IS_EMPTY_HPP */ |