xref: /external/protobuf/src/google/protobuf/compiler/cpp/cpp_enum.h

// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// http://code.google.com/p/protobuf/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//     * Neither the name of Google Inc. nor the names of its
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// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// 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);

  // Generate specialization of GetEnumDescriptor<MyEnum>().
  // Precondition: in ::google::protobuf namespace.
  void GenerateGetEnumDescriptorSpecializations(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__