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1 | |
2 | // (C) Copyright Edward Diener 2011-2015 | |
3 | // Use, modification and distribution are subject to the Boost Software License, | |
4 | // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at | |
5 | // http://www.boost.org/LICENSE_1_0.txt). | |
6 | ||
7 | #if !defined(BOOST_VMD_DETAIL_IS_EMPTY_HPP) | |
8 | #define BOOST_VMD_DETAIL_IS_EMPTY_HPP | |
9 | ||
10 | #include <boost/preprocessor/punctuation/is_begin_parens.hpp> | |
11 | ||
12 | #if BOOST_VMD_MSVC | |
13 | ||
14 | # pragma warning(once:4002) | |
15 | ||
16 | #define BOOST_VMD_DETAIL_IS_EMPTY_IIF_0(t, b) b | |
17 | #define BOOST_VMD_DETAIL_IS_EMPTY_IIF_1(t, b) t | |
18 | ||
19 | #if BOOST_VMD_MSVC_V8 | |
20 | ||
21 | #define BOOST_VMD_DETAIL_IS_EMPTY_PROCESS(param) \ | |
22 | BOOST_PP_IS_BEGIN_PARENS \ | |
23 | ( \ | |
24 | BOOST_VMD_DETAIL_IS_EMPTY_NON_FUNCTION_C param () \ | |
25 | ) \ | |
26 | /**/ | |
27 | ||
28 | #else | |
29 | ||
30 | #define BOOST_VMD_DETAIL_IS_EMPTY_PROCESS(...) \ | |
31 | BOOST_PP_IS_BEGIN_PARENS \ | |
32 | ( \ | |
33 | BOOST_VMD_DETAIL_IS_EMPTY_NON_FUNCTION_C __VA_ARGS__ () \ | |
34 | ) \ | |
35 | /**/ | |
36 | ||
37 | #endif | |
38 | ||
39 | #else | |
40 | ||
41 | #define BOOST_VMD_DETAIL_IS_EMPTY_IIF_0(t, ...) __VA_ARGS__ | |
42 | #define BOOST_VMD_DETAIL_IS_EMPTY_IIF_1(t, ...) t | |
43 | ||
44 | #define BOOST_VMD_DETAIL_IS_EMPTY_PROCESS(...) \ | |
45 | BOOST_PP_IS_BEGIN_PARENS \ | |
46 | ( \ | |
47 | BOOST_VMD_DETAIL_IS_EMPTY_NON_FUNCTION_C __VA_ARGS__ () \ | |
48 | ) \ | |
49 | /**/ | |
50 | ||
51 | #endif /* BOOST_VMD_MSVC */ | |
52 | ||
53 | #define BOOST_VMD_DETAIL_IS_EMPTY_PRIMITIVE_CAT(a, b) a ## b | |
54 | #define BOOST_VMD_DETAIL_IS_EMPTY_IIF(bit) \ | |
55 | BOOST_VMD_DETAIL_IS_EMPTY_PRIMITIVE_CAT(BOOST_VMD_DETAIL_IS_EMPTY_IIF_,bit) \ | |
56 | /**/ | |
57 | ||
58 | #define BOOST_VMD_DETAIL_IS_EMPTY_NON_FUNCTION_C(...) () | |
59 | #define BOOST_VMD_DETAIL_IS_EMPTY_GEN_ZERO(...) 0 | |
60 | ||
61 | #endif /* BOOST_VMD_DETAIL_IS_EMPTY_HPP */ |