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| Rev | Author | Line No. | Line |
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| 14 | pmbaty | 1 | //===- CommentVisitor.h - Visitor for Comment subclasses --------*- C++ -*-===// |
| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |||
| 9 | #ifndef LLVM_CLANG_AST_COMMENTVISITOR_H |
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| 10 | #define LLVM_CLANG_AST_COMMENTVISITOR_H |
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| 11 | |||
| 12 | #include "clang/AST/Comment.h" |
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| 13 | #include "llvm/ADT/STLExtras.h" |
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| 14 | #include "llvm/Support/ErrorHandling.h" |
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| 15 | |||
| 16 | namespace clang { |
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| 17 | namespace comments { |
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| 18 | template <template <typename> class Ptr, typename ImplClass, |
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| 19 | typename RetTy = void, class... ParamTys> |
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| 20 | class CommentVisitorBase { |
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| 21 | public: |
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| 22 | #define PTR(CLASS) typename Ptr<CLASS>::type |
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| 23 | #define DISPATCH(NAME, CLASS) \ |
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| 24 | return static_cast<ImplClass *>(this)->visit##NAME( \ |
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| 25 | static_cast<PTR(CLASS)>(C), std::forward<ParamTys>(P)...) |
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| 26 | |||
| 27 | RetTy visit(PTR(Comment) C, ParamTys... P) { |
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| 28 | if (!C) |
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| 29 | return RetTy(); |
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| 30 | |||
| 31 | switch (C->getCommentKind()) { |
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| 32 | default: llvm_unreachable("Unknown comment kind!"); |
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| 33 | #define ABSTRACT_COMMENT(COMMENT) |
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| 34 | #define COMMENT(CLASS, PARENT) \ |
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| 35 | case Comment::CLASS##Kind: DISPATCH(CLASS, CLASS); |
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| 36 | #include "clang/AST/CommentNodes.inc" |
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| 37 | #undef ABSTRACT_COMMENT |
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| 38 | #undef COMMENT |
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| 39 | } |
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| 40 | } |
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| 41 | |||
| 42 | // If the derived class does not implement a certain Visit* method, fall back |
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| 43 | // on Visit* method for the superclass. |
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| 44 | #define ABSTRACT_COMMENT(COMMENT) COMMENT |
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| 45 | #define COMMENT(CLASS, PARENT) \ |
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| 46 | RetTy visit##CLASS(PTR(CLASS) C, ParamTys... P) { DISPATCH(PARENT, PARENT); } |
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| 47 | #include "clang/AST/CommentNodes.inc" |
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| 48 | #undef ABSTRACT_COMMENT |
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| 49 | #undef COMMENT |
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| 50 | |||
| 51 | RetTy visitComment(PTR(Comment) C, ParamTys... P) { return RetTy(); } |
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| 52 | |||
| 53 | #undef PTR |
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| 54 | #undef DISPATCH |
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| 55 | }; |
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| 56 | |||
| 57 | template <typename ImplClass, typename RetTy = void, class... ParamTys> |
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| 58 | class CommentVisitor : public CommentVisitorBase<std::add_pointer, ImplClass, |
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| 59 | RetTy, ParamTys...> {}; |
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| 60 | |||
| 61 | template <typename ImplClass, typename RetTy = void, class... ParamTys> |
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| 62 | class ConstCommentVisitor |
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| 63 | : public CommentVisitorBase<llvm::make_const_ptr, ImplClass, RetTy, |
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| 64 | ParamTys...> {}; |
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| 65 | |||
| 66 | } // namespace comments |
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| 67 | } // namespace clang |
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| 68 | |||
| 69 | #endif // LLVM_CLANG_AST_COMMENTVISITOR_H |