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