1// Protocol Buffers - Google's data interchange format 2// Copyright 2008 Google Inc. All rights reserved. 3// http://code.google.com/p/protobuf/ 4// 5// Redistribution and use in source and binary forms, with or without 6// modification, are permitted provided that the following conditions are 7// met: 8// 9// * Redistributions of source code must retain the above copyright 10// notice, this list of conditions and the following disclaimer. 11// * Redistributions in binary form must reproduce the above 12// copyright notice, this list of conditions and the following disclaimer 13// in the documentation and/or other materials provided with the 14// distribution. 15// * Neither the name of Google Inc. nor the names of its 16// contributors may be used to endorse or promote products derived from 17// this software without specific prior written permission. 18// 19// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 31// Author: kenton@google.com (Kenton Varda) 32// Based on original Protocol Buffers design by 33// Sanjay Ghemawat, Jeff Dean, and others. 34 35#ifndef GOOGLE_PROTOBUF_COMPILER_CPP_EXTENSION_H__ 36#define GOOGLE_PROTOBUF_COMPILER_CPP_EXTENSION_H__ 37 38#include <string> 39#include <google/protobuf/stubs/common.h> 40#include <google/protobuf/compiler/cpp/cpp_options.h> 41 42namespace google { 43namespace protobuf { 44 class FieldDescriptor; // descriptor.h 45 namespace io { 46 class Printer; // printer.h 47 } 48} 49 50namespace protobuf { 51namespace compiler { 52namespace cpp { 53 54// Generates code for an extension, which may be within the scope of some 55// message or may be at file scope. This is much simpler than FieldGenerator 56// since extensions are just simple identifiers with interesting types. 57class ExtensionGenerator { 58 public: 59 // See generator.cc for the meaning of dllexport_decl. 60 explicit ExtensionGenerator(const FieldDescriptor* desycriptor, 61 const Options& options); 62 ~ExtensionGenerator(); 63 64 // Header stuff. 65 void GenerateDeclaration(io::Printer* printer); 66 67 // Source file stuff. 68 void GenerateDefinition(io::Printer* printer); 69 70 // Generate code to register the extension. 71 void GenerateRegistration(io::Printer* printer); 72 73 private: 74 const FieldDescriptor* descriptor_; 75 string type_traits_; 76 Options options_; 77 78 GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(ExtensionGenerator); 79}; 80 81} // namespace cpp 82} // namespace compiler 83} // namespace protobuf 84 85} // namespace google 86#endif // GOOGLE_PROTOBUF_COMPILER_CPP_MESSAGE_H__ 87