config.h

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 *
 * Copyright 2016, Google Inc.
 * All rights reserved.
 *
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 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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#ifndef GRPCXX_IMPL_CODEGEN_CONFIG_H
#define GRPCXX_IMPL_CODEGEN_CONFIG_H

#if !defined(GRPC_NO_AUTODETECT_PLATFORM)

#ifdef _MSC_VER
// Visual Studio 2010 is 1600.
#if _MSC_VER < 1600
#error "gRPC is only supported with Visual Studio starting at 2010"
// Visual Studio 2013 is 1800.
#elif _MSC_VER < 1800
#define GRPC_CXX0X_NO_FINAL 1
#define GRPC_CXX0X_NO_OVERRIDE 1
#define GRPC_CXX0X_NO_CHRONO 1
#define GRPC_CXX0X_NO_THREAD 1
#endif
#endif  // Visual Studio

#ifndef __clang__
#ifdef __GNUC__
// nullptr was added in gcc 4.6
#if (__GNUC__ * 100 + __GNUC_MINOR__ < 406)
#define GRPC_CXX0X_NO_NULLPTR 1
#define GRPC_CXX0X_LIMITED_TOSTRING 1
#endif
// final and override were added in gcc 4.7
#if (__GNUC__ * 100 + __GNUC_MINOR__ < 407)
#define GRPC_CXX0X_NO_FINAL 1
#define GRPC_CXX0X_NO_OVERRIDE 1
#endif
#endif
#endif

#endif

#ifdef GRPC_CXX0X_NO_FINAL
#define GRPC_FINAL
#else
#define GRPC_FINAL final
#endif

#ifdef GRPC_CXX0X_NO_OVERRIDE
#define GRPC_OVERRIDE
#else
#define GRPC_OVERRIDE override
#endif

#ifdef GRPC_CXX0X_NO_NULLPTR
#include <functional>
#include <memory>
namespace grpc {
const class {
 public:
  template <class T>
  operator T *() const {
    return static_cast<T *>(0);
  }
  template <class T>
  operator std::unique_ptr<T>() const {
    return std::unique_ptr<T>(static_cast<T *>(0));
  }
  template <class T>
  operator std::shared_ptr<T>() const {
    return std::shared_ptr<T>(static_cast<T *>(0));
  }
  operator bool() const { return false; }
  template <class F>
  operator std::function<F>() const {
    return std::function<F>();
  }

 private:
  void operator&() const = delete;
} nullptr = {};
}
#endif

#ifndef GRPC_CUSTOM_STRING
#include <string>
#define GRPC_CUSTOM_STRING std::string
#endif

namespace grpc {

typedef GRPC_CUSTOM_STRING string;

#ifdef GRPC_CXX0X_LIMITED_TOSTRING
inline grpc::string to_string(const int x) {
  return std::to_string(static_cast<const long long int>(x));
}
inline grpc::string to_string(const unsigned int x) {
  return std::to_string(static_cast<const long long unsigned int>(x));
}
#else
using std::to_string;
#endif

}  // namespace grpc

#endif  // GRPCXX_IMPL_CODEGEN_CONFIG_H