1/*
2 * MessagePack for C++ version switcher
3 *
4 * Copyright (C) 2014 KONDO Takatoshi
5 *
6 *    Distributed under the Boost Software License, Version 1.0.
7 *    (See accompanying file LICENSE_1_0.txt or copy at
8 *    http://www.boost.org/LICENSE_1_0.txt)
9 */
10#ifndef MSGPACK_VERSIONING_HPP
11#define MSGPACK_VERSIONING_HPP
12
13#if !defined(MSGPACK_DEFAULT_API_VERSION)
14#define MSGPACK_DEFAULT_API_VERSION 1
15#endif
16
17#define MSGPACK_DEFAULT_API_NS MSGPACK_DETAIL_PP_CAT(v, MSGPACK_DEFAULT_API_VERSION)
18
19#if   MSGPACK_DEFAULT_API_VERSION == 1
20#define MSGPACK_DETAIL_PP_ENABLE_NS_v1 ()
21//#elif MSGPACK_DEFAULT_API_VERSION == 2
22//#define MSGPACK_DETAIL_PP_ENABLE_NS_v2 ()
23#else
24#error
25#endif
26
27#define MSGPACK_DETAIL_PP_CAT(a, ...) MSGPACK_DETAIL_PP_PRIMITIVE_CAT(a, __VA_ARGS__)
28#define MSGPACK_DETAIL_PP_PRIMITIVE_CAT(a, ...) a ## __VA_ARGS__
29
30#define MSGPACK_DETAIL_PP_IIF(c) MSGPACK_DETAIL_PP_PRIMITIVE_CAT(MSGPACK_DETAIL_PP_IIF_, c)
31#define MSGPACK_DETAIL_PP_IIF_0(t, ...) __VA_ARGS__
32#define MSGPACK_DETAIL_PP_IIF_1(t, ...) t
33
34#define MSGPACK_DETAIL_PP_PROBE(x) x, 1
35
36#if defined(_MSC_VER)
37
38#define MSGPACK_DETAIL_PP_MSVC_VA_ARGS_WORKAROUND(define, args) define args
39#define MSGPACK_DETAIL_PP_CHECK(...) MSGPACK_DETAIL_PP_MSVC_VA_ARGS_WORKAROUND(MSGPACK_DETAIL_PP_CHECK_N, (__VA_ARGS__, 0))
40#define MSGPACK_DETAIL_PP_CHECK_N(x, n, ...) n
41
42#else  // defined(__MSC_VER)
43
44#define MSGPACK_DETAIL_PP_CHECK(...) MSGPACK_DETAIL_PP_CHECK_N(__VA_ARGS__, 0)
45#define MSGPACK_DETAIL_PP_CHECK_N(x, n, ...) n
46
47#endif // defined(__MSC_VER)
48
49
50#define MSGPACK_DETAIL_PP_NS_ENABLED_PROBE(ns)            MSGPACK_DETAIL_PP_NS_ENABLED_PROBE_PROXY( MSGPACK_DETAIL_PP_ENABLE_NS_##ns )
51#define MSGPACK_DETAIL_PP_NS_ENABLED_PROBE_PROXY(...)     MSGPACK_DETAIL_PP_NS_ENABLED_PROBE_PRIMIVIE(__VA_ARGS__)
52#define MSGPACK_DETAIL_PP_NS_ENABLED_PROBE_PRIMIVIE(x)    MSGPACK_DETAIL_PP_NS_ENABLED_PROBE_COMBINE_ x
53#define MSGPACK_DETAIL_PP_NS_ENABLED_PROBE_COMBINE_(...)  MSGPACK_DETAIL_PP_PROBE(~)
54
55#define MSGPACK_DETAIL_PP_IS_NS_ENABLED(ns) MSGPACK_DETAIL_PP_CHECK(MSGPACK_DETAIL_PP_NS_ENABLED_PROBE(ns))
56
57#if __cplusplus < 201103L
58#define MSGPACK_API_VERSION_NAMESPACE(ns) MSGPACK_DETAIL_PP_IIF(MSGPACK_DETAIL_PP_IS_NS_ENABLED(ns)) \
59    (namespace ns{}; using namespace ns; namespace ns, \
60     namespace ns)
61
62#else  // __cplusplus < 201103L
63
64#define MSGPACK_API_VERSION_NAMESPACE(ns) MSGPACK_DETAIL_PP_IIF(MSGPACK_DETAIL_PP_IS_NS_ENABLED(ns)) \
65    (inline namespace ns, namespace ns)
66
67#endif // __cplusplus < 201103L
68
69#endif // MSGPACK_VERSIONING_HPP
70