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is_empty.hpp
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1# /* **************************************************************************
2# * *
3# * (C) Copyright Edward Diener 2014.
4# * Distributed under the Boost Software License, Version 1.0. (See
5# * accompanying file LICENSE_1_0.txt or copy at
6# * http://www.boost.org/LICENSE_1_0.txt)
7# * *
8# ************************************************************************** */
9#
10# /* See http://www.boost.org for most recent version. */
11#
12#ifndef MSGPACK_PREPROCESSOR_DETAIL_IS_EMPTY_HPP
13#define MSGPACK_PREPROCESSOR_DETAIL_IS_EMPTY_HPP
14
16
17#if MSGPACK_PP_VARIADICS_MSVC
18
19# pragma warning(once:4002)
20
21#define MSGPACK_PP_DETAIL_IS_EMPTY_IIF_0(t, b) b
22#define MSGPACK_PP_DETAIL_IS_EMPTY_IIF_1(t, b) t
23
24#else
25
26#define MSGPACK_PP_DETAIL_IS_EMPTY_IIF_0(t, ...) __VA_ARGS__
27#define MSGPACK_PP_DETAIL_IS_EMPTY_IIF_1(t, ...) t
28
29#endif
30
31#if MSGPACK_PP_VARIADICS_MSVC && _MSC_VER <= 1400
32
33#define MSGPACK_PP_DETAIL_IS_EMPTY_PROCESS(param) \
34 MSGPACK_PP_IS_BEGIN_PARENS \
35 ( \
36 MSGPACK_PP_DETAIL_IS_EMPTY_NON_FUNCTION_C param () \
37 ) \
38
39
40#else
41
42#define MSGPACK_PP_DETAIL_IS_EMPTY_PROCESS(...) \
43 MSGPACK_PP_IS_BEGIN_PARENS \
44 ( \
45 MSGPACK_PP_DETAIL_IS_EMPTY_NON_FUNCTION_C __VA_ARGS__ () \
46 ) \
47
48
49#endif
50
51#define MSGPACK_PP_DETAIL_IS_EMPTY_PRIMITIVE_CAT(a, b) a ## b
52#define MSGPACK_PP_DETAIL_IS_EMPTY_IIF(bit) MSGPACK_PP_DETAIL_IS_EMPTY_PRIMITIVE_CAT(MSGPACK_PP_DETAIL_IS_EMPTY_IIF_,bit)
53#define MSGPACK_PP_DETAIL_IS_EMPTY_NON_FUNCTION_C(...) ()
54
55#endif /* MSGPACK_PREPROCESSOR_DETAIL_IS_EMPTY_HPP */