private_handle_accessor.h

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//

// Copyright 2020 The Abseil Authors.

//

// 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

//

//      https://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.

#ifndef ABSL_FLAGS_INTERNAL_PRIVATE_HANDLE_ACCESSOR_H_

#define ABSL_FLAGS_INTERNAL_PRIVATE_HANDLE_ACCESSOR_H_

#include <memory>

#include <string>

#include "absl/base/config.h"

#include "absl/flags/commandlineflag.h"

#include "absl/flags/internal/commandlineflag.h"

#include "absl/strings/string_view.h"

namespace absl {

ABSL_NAMESPACE_BEGIN

namespace flags_internal {

// This class serves as a trampoline to access private methods of

// CommandLineFlag. This class is intended for use exclusively internally inside

// of the Abseil Flags implementation.

class PrivateHandleAccessor {

 public:

  // Access to CommandLineFlag::TypeId.

  static FlagFastTypeId TypeId(const CommandLineFlag& flag);

  // Access to CommandLineFlag::SaveState.

  static std::unique_ptr<FlagStateInterface> SaveState(CommandLineFlag& flag);

  // Access to CommandLineFlag::IsSpecifiedOnCommandLine.

  static bool IsSpecifiedOnCommandLine(const CommandLineFlag& flag);

  // Access to CommandLineFlag::ValidateInputValue.

  static bool ValidateInputValue(const CommandLineFlag& flag,

                                 absl::string_view value);

  // Access to CommandLineFlag::CheckDefaultValueParsingRoundtrip.

  static void CheckDefaultValueParsingRoundtrip(const CommandLineFlag& flag);

  static bool ParseFrom(CommandLineFlag& flag, absl::string_view value,

                        flags_internal::FlagSettingMode set_mode,

                        flags_internal::ValueSource source, std::string& error);

};

}  // namespace flags_internal

ABSL_NAMESPACE_END

}  // namespace absl

#endif  // ABSL_FLAGS_INTERNAL_PRIVATE_HANDLE_ACCESSOR_H_