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,
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25// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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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