// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// https://developers.google.com/protocol-buffers/
//
// 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
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

// 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"
#include "google/protobuf/compiler/cpp/options.h"
#include "google/protobuf/io/printer.h"

namespace google {
namespace protobuf {
namespace compiler {
namespace cpp {
class EnumGenerator {
 public:
  EnumGenerator(const EnumDescriptor* descriptor, const Options& options);

  EnumGenerator(const EnumGenerator&) = delete;
  EnumGenerator& operator=(const EnumGenerator&) = delete;

  ~EnumGenerator() = default;

  // 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* p);

  // Generate specialization of GetEnumDescriptor<MyEnum>().
  // Precondition: in ::google::protobuf namespace.
  void GenerateGetEnumDescriptorSpecializations(io::Printer* p);

  // 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* p) const;

  // Source file stuff.

  // Generate non-inline methods related to the enum, such as IsValidValue().
  // Goes in the .cc file. EnumDescriptors are stored in an array, idx is
  // the index in this array that corresponds with this enum.
  void GenerateMethods(int idx, io::Printer* p);

 private:
  friend class FileGenerator;

  struct ValueLimits {
    const EnumValueDescriptor* min;
    const EnumValueDescriptor* max;

    static ValueLimits FromEnum(const EnumDescriptor* descriptor);
  };

  const EnumDescriptor* enum_;
  Options options_;

  bool generate_array_size_;
  bool should_cache_;
  bool has_reflection_;
  ValueLimits limits_;
};

}  // namespace cpp
}  // namespace compiler
}  // namespace protobuf
}  // namespace google

#endif  // GOOGLE_PROTOBUF_COMPILER_CPP_ENUM_H__
