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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 */