70 lines
2.5 KiB
C++
70 lines
2.5 KiB
C++
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/*
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* MessagePack for C++ version switcher
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*
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* Copyright (C) 2014 KONDO Takatoshi
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*
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* Distributed under the Boost Software License, Version 1.0.
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* (See accompanying file LICENSE_1_0.txt or copy at
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* http://www.boost.org/LICENSE_1_0.txt)
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*/
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#ifndef MSGPACK_VERSIONING_HPP
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#define MSGPACK_VERSIONING_HPP
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#if !defined(MSGPACK_DEFAULT_API_VERSION)
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#define MSGPACK_DEFAULT_API_VERSION 2
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#endif
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#define MSGPACK_DEFAULT_API_NS MSGPACK_DETAIL_PP_CAT(v, MSGPACK_DEFAULT_API_VERSION)
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#if MSGPACK_DEFAULT_API_VERSION == 1
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#define MSGPACK_DETAIL_PP_ENABLE_NS_v1 ()
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#elif MSGPACK_DEFAULT_API_VERSION == 2
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#define MSGPACK_DETAIL_PP_ENABLE_NS_v2 ()
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#else
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#error
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#endif
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#define MSGPACK_DETAIL_PP_CAT(a, ...) MSGPACK_DETAIL_PP_PRIMITIVE_CAT(a, __VA_ARGS__)
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#define MSGPACK_DETAIL_PP_PRIMITIVE_CAT(a, ...) a ## __VA_ARGS__
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#define MSGPACK_DETAIL_PP_IIF(c) MSGPACK_DETAIL_PP_PRIMITIVE_CAT(MSGPACK_DETAIL_PP_IIF_, c)
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#define MSGPACK_DETAIL_PP_IIF_0(t, ...) __VA_ARGS__
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#define MSGPACK_DETAIL_PP_IIF_1(t, ...) t
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#define MSGPACK_DETAIL_PP_PROBE(x) x, 1
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#if defined(_MSC_VER)
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#define MSGPACK_DETAIL_PP_MSVC_VA_ARGS_WORKAROUND(define, args) define args
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#define MSGPACK_DETAIL_PP_CHECK(...) MSGPACK_DETAIL_PP_MSVC_VA_ARGS_WORKAROUND(MSGPACK_DETAIL_PP_CHECK_N, (__VA_ARGS__, 0, 0))
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#define MSGPACK_DETAIL_PP_CHECK_N(x, n, ...) n
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#else // defined(__MSC_VER)
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#define MSGPACK_DETAIL_PP_CHECK(...) MSGPACK_DETAIL_PP_CHECK_N(__VA_ARGS__, 0, 0)
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#define MSGPACK_DETAIL_PP_CHECK_N(x, n, ...) n
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#endif // defined(__MSC_VER)
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#define MSGPACK_DETAIL_PP_NS_ENABLED_PROBE(ns) MSGPACK_DETAIL_PP_NS_ENABLED_PROBE_PROXY( MSGPACK_DETAIL_PP_ENABLE_NS_##ns )
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#define MSGPACK_DETAIL_PP_NS_ENABLED_PROBE_PROXY(...) MSGPACK_DETAIL_PP_NS_ENABLED_PROBE_PRIMIVIE(__VA_ARGS__)
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#define MSGPACK_DETAIL_PP_NS_ENABLED_PROBE_PRIMIVIE(x) MSGPACK_DETAIL_PP_NS_ENABLED_PROBE_COMBINE_ x
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#define MSGPACK_DETAIL_PP_NS_ENABLED_PROBE_COMBINE_(...) MSGPACK_DETAIL_PP_PROBE(~)
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#define MSGPACK_DETAIL_PP_IS_NS_ENABLED(ns) MSGPACK_DETAIL_PP_CHECK(MSGPACK_DETAIL_PP_NS_ENABLED_PROBE(ns))
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#if __cplusplus < 201103L
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#define MSGPACK_API_VERSION_NAMESPACE(ns) MSGPACK_DETAIL_PP_IIF(MSGPACK_DETAIL_PP_IS_NS_ENABLED(ns)) \
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(namespace ns{}; using namespace ns; namespace ns, \
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namespace ns)
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#else // __cplusplus < 201103L
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#define MSGPACK_API_VERSION_NAMESPACE(ns) MSGPACK_DETAIL_PP_IIF(MSGPACK_DETAIL_PP_IS_NS_ENABLED(ns)) \
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(inline namespace ns, namespace ns)
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#endif // __cplusplus < 201103L
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#endif // MSGPACK_VERSIONING_HPP
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