// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// https://developers.google.com/protocol-buffers/
//
// Redistribution and use in source and binary forms, with or without
// 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.
//
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// Author: seongkim@google.com (Seong Beom Kim)
//  Based on original Protocol Buffers design by
//  Sanjay Ghemawat, Jeff Dean, and others.

#ifndef GOOGLE_PROTOBUF_COMPILER_CPP_MESSAGE_LAYOUT_HELPER_H__
#define GOOGLE_PROTOBUF_COMPILER_CPP_MESSAGE_LAYOUT_HELPER_H__

#include "google/protobuf/descriptor.h"
#include "google/protobuf/compiler/cpp/options.h"

namespace google {
namespace protobuf {
namespace compiler {
namespace cpp {

class MessageSCCAnalyzer;

// Provides an abstract interface to optimize message layout
// by rearranging the fields of a message.
class MessageLayoutHelper {
 public:
  virtual ~MessageLayoutHelper() {}

  virtual void OptimizeLayout(std::vector<const FieldDescriptor*>* fields,
                              const Options& options,
                              MessageSCCAnalyzer* scc_analyzer) = 0;
};

}  // namespace cpp
}  // namespace compiler
}  // namespace protobuf
}  // namespace google

#endif  // GOOGLE_PROTOBUF_COMPILER_CPP_MESSAGE_LAYOUT_HELPER_H__