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 41namespace google { 42namespace protobuf { 43 class FieldDescriptor; // descriptor.h 44 namespace io { 45 class Printer; // printer.h 46 } 47} 48 49namespace protobuf { 50namespace compiler { 51namespace cpp { 52 53// Generates code for an extension, which may be within the scope of some 54// message or may be at file scope. This is much simpler than FieldGenerator 55// since extensions are just simple identifiers with interesting types. 56class ExtensionGenerator { 57 public: 58 // See generator.cc for the meaning of dllexport_decl. 59 explicit ExtensionGenerator(const FieldDescriptor* descriptor, 60 const string& dllexport_decl); 61 ~ExtensionGenerator(); 62 63 // Header stuff. 64 void GenerateDeclaration(io::Printer* printer); 65 66 // Source file stuff. 67 void GenerateDefinition(io::Printer* printer); 68 69 // Generate code to register the extension. 70 void GenerateRegistration(io::Printer* printer); 71 72 private: 73 const FieldDescriptor* descriptor_; 74 string type_traits_; 75 string dllexport_decl_; 76 77 GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(ExtensionGenerator); 78}; 79 80} // namespace cpp 81} // namespace compiler 82} // namespace protobuf 83 84} // namespace google 85#endif // GOOGLE_PROTOBUF_COMPILER_CPP_MESSAGE_H__ 86