versioning.hpp 2.5 KB

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  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. #if !defined(MSGPACK_DEFAULT_API_VERSION)
  13. #define MSGPACK_DEFAULT_API_VERSION 1
  14. #endif
  15. #define MSGPACK_DEFAULT_API_NS MSGPACK_DETAIL_PP_CAT(v, MSGPACK_DEFAULT_API_VERSION)
  16. #if MSGPACK_DEFAULT_API_VERSION == 1
  17. #define MSGPACK_DETAIL_PP_ENABLE_NS_v1 ()
  18. //#elif MSGPACK_DEFAULT_API_VERSION == 2
  19. //#define MSGPACK_DETAIL_PP_ENABLE_NS_v2 ()
  20. #else
  21. #error
  22. #endif
  23. #define MSGPACK_DETAIL_PP_CAT(a, ...) MSGPACK_DETAIL_PP_PRIMITIVE_CAT(a, __VA_ARGS__)
  24. #define MSGPACK_DETAIL_PP_PRIMITIVE_CAT(a, ...) a ## __VA_ARGS__
  25. #define MSGPACK_DETAIL_PP_IIF(c) MSGPACK_DETAIL_PP_PRIMITIVE_CAT(MSGPACK_DETAIL_PP_IIF_, c)
  26. #define MSGPACK_DETAIL_PP_IIF_0(t, ...) __VA_ARGS__
  27. #define MSGPACK_DETAIL_PP_IIF_1(t, ...) t
  28. #define MSGPACK_DETAIL_PP_PROBE(x) x, 1
  29. #if defined(_MSC_VER)
  30. #define MSGPACK_DETAIL_PP_MSVC_VA_ARGS_WORKAROUND(define, args) define args
  31. #define MSGPACK_DETAIL_PP_CHECK(...) MSGPACK_DETAIL_PP_MSVC_VA_ARGS_WORKAROUND(MSGPACK_DETAIL_PP_CHECK_N, (__VA_ARGS__, 0))
  32. #define MSGPACK_DETAIL_PP_CHECK_N(x, n, ...) n
  33. #else // defined(__MSC_VER)
  34. #define MSGPACK_DETAIL_PP_CHECK(...) MSGPACK_DETAIL_PP_CHECK_N(__VA_ARGS__, 0)
  35. #define MSGPACK_DETAIL_PP_CHECK_N(x, n, ...) n
  36. #endif // defined(__MSC_VER)
  37. #define MSGPACK_DETAIL_PP_NS_ENABLED_PROBE(ns) MSGPACK_DETAIL_PP_NS_ENABLED_PROBE_PROXY( MSGPACK_DETAIL_PP_ENABLE_NS_##ns )
  38. #define MSGPACK_DETAIL_PP_NS_ENABLED_PROBE_PROXY(...) MSGPACK_DETAIL_PP_NS_ENABLED_PROBE_PRIMIVIE(__VA_ARGS__)
  39. #define MSGPACK_DETAIL_PP_NS_ENABLED_PROBE_PRIMIVIE(x) MSGPACK_DETAIL_PP_NS_ENABLED_PROBE_COMBINE_ x
  40. #define MSGPACK_DETAIL_PP_NS_ENABLED_PROBE_COMBINE_(...) MSGPACK_DETAIL_PP_PROBE(~)
  41. #define MSGPACK_DETAIL_PP_IS_NS_ENABLED(ns) MSGPACK_DETAIL_PP_CHECK(MSGPACK_DETAIL_PP_NS_ENABLED_PROBE(ns))
  42. #if __cplusplus < 201103L
  43. #define MSGPACK_API_VERSION_NAMESPACE(ns) MSGPACK_DETAIL_PP_IIF(MSGPACK_DETAIL_PP_IS_NS_ENABLED(ns)) \
  44. (namespace ns{}; using namespace ns; namespace ns, \
  45. namespace ns)
  46. #else // __cplusplus < 201103L
  47. #define MSGPACK_API_VERSION_NAMESPACE(ns) MSGPACK_DETAIL_PP_IIF(MSGPACK_DETAIL_PP_IS_NS_ENABLED(ns)) \
  48. (inline namespace ns, namespace ns)
  49. #endif // __cplusplus < 201103L
  50. #endif // MSGPACK_VERSIONING_HPP