1 //===--- RefactoringOptions.h - Clang refactoring library -----------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #ifndef LLVM_CLANG_TOOLING_REFACTORING_REFACTORINGOPTIONS_H
10 #define LLVM_CLANG_TOOLING_REFACTORING_REFACTORINGOPTIONS_H
11 
12 #include "clang/Basic/LLVM.h"
13 #include "clang/Tooling/Refactoring/RefactoringActionRuleRequirements.h"
14 #include "clang/Tooling/Refactoring/RefactoringOption.h"
15 #include "clang/Tooling/Refactoring/RefactoringOptionVisitor.h"
16 #include "llvm/Support/Error.h"
17 #include <optional>
18 #include <type_traits>
19 
20 namespace clang {
21 namespace tooling {
22 
23 /// A refactoring option that stores a value of type \c T.
24 template <typename T,
25           typename = std::enable_if_t<traits::IsValidOptionType<T>::value>>
26 class OptionalRefactoringOption : public RefactoringOption {
27 public:
28   void passToVisitor(RefactoringOptionVisitor &Visitor) final {
29     Visitor.visit(*this, Value);
30   }
31 
32   bool isRequired() const override { return false; }
33 
34   using ValueType = std::optional<T>;
35 
36   const ValueType &getValue() const { return Value; }
37 
38 protected:
39   std::optional<T> Value;
40 };
41 
42 /// A required refactoring option that stores a value of type \c T.
43 template <typename T,
44           typename = std::enable_if_t<traits::IsValidOptionType<T>::value>>
45 class RequiredRefactoringOption : public OptionalRefactoringOption<T> {
46 public:
47   using ValueType = T;
48 
49   const ValueType &getValue() const {
50     return *OptionalRefactoringOption<T>::Value;
51   }
52   bool isRequired() const final { return true; }
53 };
54 
55 } // end namespace tooling
56 } // end namespace clang
57 
58 #endif // LLVM_CLANG_TOOLING_REFACTORING_REFACTORINGOPTIONS_H
59