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 BOOST_PREPROCESSOR_DETAIL_IS_BEGIN_PARENS_HPP
13#define BOOST_PREPROCESSOR_DETAIL_IS_BEGIN_PARENS_HPP
14
15#if BOOST_PP_VARIADICS_MSVC
16
17#include <boost/preprocessor/facilities/empty.hpp>
18
19#define BOOST_PP_DETAIL_VD_IBP_CAT(a, b) BOOST_PP_DETAIL_VD_IBP_CAT_I(a, b)
20#define BOOST_PP_DETAIL_VD_IBP_CAT_I(a, b) BOOST_PP_DETAIL_VD_IBP_CAT_II(a ## b)
21#define BOOST_PP_DETAIL_VD_IBP_CAT_II(res) res
22
23#define BOOST_PP_DETAIL_IBP_SPLIT(i, ...) \
24 BOOST_PP_DETAIL_VD_IBP_CAT(BOOST_PP_DETAIL_IBP_PRIMITIVE_CAT(BOOST_PP_DETAIL_IBP_SPLIT_,i)(__VA_ARGS__),BOOST_PP_EMPTY()) \
25/**/
26
27#define BOOST_PP_DETAIL_IBP_IS_VARIADIC_C(...) 1 1
28
29#else
30
31#define BOOST_PP_DETAIL_IBP_SPLIT(i, ...) \
32 BOOST_PP_DETAIL_IBP_PRIMITIVE_CAT(BOOST_PP_DETAIL_IBP_SPLIT_,i)(__VA_ARGS__) \
33/**/
34
35#define BOOST_PP_DETAIL_IBP_IS_VARIADIC_C(...) 1
36
37#endif /* BOOST_PP_VARIADICS_MSVC */
38
39#define BOOST_PP_DETAIL_IBP_SPLIT_0(a, ...) a
40#define BOOST_PP_DETAIL_IBP_SPLIT_1(a, ...) __VA_ARGS__
41
42#define BOOST_PP_DETAIL_IBP_CAT(a, ...) BOOST_PP_DETAIL_IBP_PRIMITIVE_CAT(a,__VA_ARGS__)
43#define BOOST_PP_DETAIL_IBP_PRIMITIVE_CAT(a, ...) a ## __VA_ARGS__
44
45#define BOOST_PP_DETAIL_IBP_IS_VARIADIC_R_1 1,
46#define BOOST_PP_DETAIL_IBP_IS_VARIADIC_R_BOOST_PP_DETAIL_IBP_IS_VARIADIC_C 0,
47
48#endif /* BOOST_PREPROCESSOR_DETAIL_IS_BEGIN_PARENS_HPP */
49

source code of include/boost/preprocessor/punctuation/detail/is_begin_parens.hpp