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diff --git a/src/google/protobuf/compiler/cpp/cpp_enum.h b/src/google/protobuf/compiler/cpp/cpp_enum.h
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+++ b/src/google/protobuf/compiler/cpp/cpp_enum.h
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+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc.
+// http://code.google.com/p/protobuf/
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Author: kenton@google.com (Kenton Varda)
+//  Based on original Protocol Buffers design by
+//  Sanjay Ghemawat, Jeff Dean, and others.
+
+#ifndef GOOGLE_PROTOBUF_COMPILER_CPP_ENUM_H__
+#define GOOGLE_PROTOBUF_COMPILER_CPP_ENUM_H__
+
+#include <string>
+#include <google/protobuf/descriptor.h>
+
+namespace google {
+namespace protobuf {
+  namespace io {
+    class Printer;             // printer.h
+  }
+}
+
+namespace protobuf {
+namespace compiler {
+namespace cpp {
+
+class EnumGenerator {
+ public:
+  // See generator.cc for the meaning of dllexport_decl.
+  explicit EnumGenerator(const EnumDescriptor* descriptor,
+                         const string& dllexport_decl);
+  ~EnumGenerator();
+
+  // Header stuff.
+
+  // Generate header code defining the enum.  This code should be placed
+  // within the enum's package namespace, but NOT within any class, even for
+  // nested enums.
+  void GenerateDefinition(io::Printer* printer);
+
+  // For enums nested within a message, generate code to import all the enum's
+  // symbols (e.g. the enum type name, all its values, etc.) into the class's
+  // namespace.  This should be placed inside the class definition in the
+  // header.
+  void GenerateSymbolImports(io::Printer* printer);
+
+  // Source file stuff.
+
+  // Generate code that initializes the global variable storing the enum's
+  // descriptor.
+  void GenerateDescriptorInitializer(io::Printer* printer, int index);
+
+  // Generate non-inline methods related to the enum, such as IsValidValue().
+  // Goes in the .cc file.
+  void GenerateMethods(io::Printer* printer);
+
+ private:
+  const EnumDescriptor* descriptor_;
+  string classname_;
+  string dllexport_decl_;
+
+  GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(EnumGenerator);
+};
+
+}  // namespace cpp
+}  // namespace compiler
+}  // namespace protobuf
+
+}  // namespace google
+#endif  // GOOGLE_PROTOBUF_COMPILER_CPP_ENUM_H__