compiler/cpp/message_layout_helper.h

0001 // Protocol Buffers - Google's data interchange format
0002 // Copyright 2008 Google Inc.  All rights reserved.
0003 //
0004 // Use of this source code is governed by a BSD-style
0005 // license that can be found in the LICENSE file or at
0006 // https://developers.google.com/open-source/licenses/bsd
0007
0008 // Author: seongkim@google.com (Seong Beom Kim)
0009 //  Based on original Protocol Buffers design by
0010 //  Sanjay Ghemawat, Jeff Dean, and others.
0011
0012 #ifndef GOOGLE_PROTOBUF_COMPILER_CPP_MESSAGE_LAYOUT_HELPER_H__
0013 #define GOOGLE_PROTOBUF_COMPILER_CPP_MESSAGE_LAYOUT_HELPER_H__
0014
0015 #include "google/protobuf/compiler/cpp/options.h"
0016 #include "google/protobuf/descriptor.h"
0017
0018 namespace google {
0019 namespace protobuf {
0020 namespace compiler {
0021 namespace cpp {
0022
0023 class MessageSCCAnalyzer;
0024
0025 // Provides an abstract interface to optimize message layout
0026 // by rearranging the fields of a message.
0027 class MessageLayoutHelper {
0028  public:
0029   virtual ~MessageLayoutHelper() {}
0030
0031   virtual void OptimizeLayout(std::vector<const FieldDescriptor*>* fields,
0032                               const Options& options,
0033                               MessageSCCAnalyzer* scc_analyzer) = 0;
0034 };
0035
0036 }  // namespace cpp
0037 }  // namespace compiler
0038 }  // namespace protobuf
0039 }  // namespace google
0040
0041 #endif  // GOOGLE_PROTOBUF_COMPILER_CPP_MESSAGE_LAYOUT_HELPER_H__