//===--- RefactoringOptions.h - Clang refactoring library -----------------===//

//

// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

// See https://llvm.org/LICENSE.txt for license information.

// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

//

//===----------------------------------------------------------------------===//

#ifndef LLVM_CLANG_TOOLING_REFACTORING_REFACTORINGOPTIONS_H

#define LLVM_CLANG_TOOLING_REFACTORING_REFACTORINGOPTIONS_H

#include "clang/Basic/LLVM.h"

#include "clang/Tooling/Refactoring/RefactoringActionRuleRequirements.h"

#include "clang/Tooling/Refactoring/RefactoringOption.h"

#include "clang/Tooling/Refactoring/RefactoringOptionVisitor.h"

#include "llvm/Support/Error.h"

#include <optional>

#include <type_traits>

namespace clang {

namespace tooling {

/// A refactoring option that stores a value of type \c T.

template <typename T,

          typename = std::enable_if_t<traits::IsValidOptionType<T>::value>>

class OptionalRefactoringOption : public RefactoringOption {

public:

  void passToVisitor(RefactoringOptionVisitor &Visitor) final {

    Visitor.visit(*this, Value);

  }

  bool isRequired() const override { return false; }

  using ValueType = std::optional<T>;

  const ValueType &getValue() const { return Value; }

protected:

  std::optional<T> Value;

};

/// A required refactoring option that stores a value of type \c T.

template <typename T,

          typename = std::enable_if_t<traits::IsValidOptionType<T>::value>>

class RequiredRefactoringOption : public OptionalRefactoringOption<T> {

public:

  using ValueType = T;

  const ValueType &getValue() const {

    return *OptionalRefactoringOption<T>::Value;

  }

  bool isRequired() const final { return true; }

};

} // end namespace tooling

} // end namespace clang

#endif // LLVM_CLANG_TOOLING_REFACTORING_REFACTORINGOPTIONS_H