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is_empty.hpp
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1# /* **************************************************************************
2# * *
3# * (C) Copyright Edward Diener 2015.
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_SEQ_DETAIL_IS_EMPTY_HPP
13# define MSGPACK_PREPROCESSOR_SEQ_DETAIL_IS_EMPTY_HPP
14#
20#
21/* An empty seq is one that is just MSGPACK_PP_SEQ_NIL */
22#
23# define MSGPACK_PP_SEQ_DETAIL_IS_EMPTY(seq) \
24 MSGPACK_PP_COMPL \
25 ( \
26 MSGPACK_PP_SEQ_DETAIL_IS_NOT_EMPTY(seq) \
27 ) \
28
29#
30# define MSGPACK_PP_SEQ_DETAIL_IS_EMPTY_SIZE(size) \
31 MSGPACK_PP_COMPL \
32 ( \
33 MSGPACK_PP_SEQ_DETAIL_IS_NOT_EMPTY_SIZE(size) \
34 ) \
35
36#
37# define MSGPACK_PP_SEQ_DETAIL_IS_NOT_EMPTY(seq) \
38 MSGPACK_PP_SEQ_DETAIL_IS_NOT_EMPTY_SIZE(MSGPACK_PP_SEQ_DETAIL_EMPTY_SIZE(seq)) \
39
40#
41# define MSGPACK_PP_SEQ_DETAIL_IS_NOT_EMPTY_SIZE(size) \
42 MSGPACK_PP_BOOL(size) \
43
44#
45# define MSGPACK_PP_SEQ_DETAIL_EMPTY_SIZE(seq) \
46 MSGPACK_PP_DEC(MSGPACK_PP_SEQ_SIZE(seq (nil))) \
47
48#
49# endif