6024e5c395
clang 20.0.0 (based on r547379) from build 12806354. Bug: http://b/379133546 Test: N/A Change-Id: I2eb8938af55d809de674be63cb30cf27e801862b Upstream-Commit: ad834e67b1105d15ef907f6255d4c96e8e733f57
71 lines
2.5 KiB
C++
71 lines
2.5 KiB
C++
//===- CommentVisitor.h - Visitor for Comment subclasses --------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_AST_COMMENTVISITOR_H
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#define LLVM_CLANG_AST_COMMENTVISITOR_H
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#include "clang/AST/Comment.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/Support/ErrorHandling.h"
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namespace clang {
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namespace comments {
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template <template <typename> class Ptr, typename ImplClass,
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typename RetTy = void, class... ParamTys>
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class CommentVisitorBase {
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public:
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#define PTR(CLASS) typename Ptr<CLASS>::type
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#define DISPATCH(NAME, CLASS) \
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return static_cast<ImplClass *>(this)->visit##NAME( \
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static_cast<PTR(CLASS)>(C), std::forward<ParamTys>(P)...)
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RetTy visit(PTR(Comment) C, ParamTys... P) {
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if (!C)
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return RetTy();
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switch (C->getCommentKind()) {
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default: llvm_unreachable("Unknown comment kind!");
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#define ABSTRACT_COMMENT(COMMENT)
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#define COMMENT(CLASS, PARENT) \
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case CommentKind::CLASS: \
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DISPATCH(CLASS, CLASS);
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#include "clang/AST/CommentNodes.inc"
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#undef ABSTRACT_COMMENT
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#undef COMMENT
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}
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}
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// If the derived class does not implement a certain Visit* method, fall back
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// on Visit* method for the superclass.
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#define ABSTRACT_COMMENT(COMMENT) COMMENT
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#define COMMENT(CLASS, PARENT) \
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RetTy visit##CLASS(PTR(CLASS) C, ParamTys... P) { DISPATCH(PARENT, PARENT); }
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#include "clang/AST/CommentNodes.inc"
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#undef ABSTRACT_COMMENT
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#undef COMMENT
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RetTy visitComment(PTR(Comment) C, ParamTys... P) { return RetTy(); }
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#undef PTR
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#undef DISPATCH
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};
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template <typename ImplClass, typename RetTy = void, class... ParamTys>
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class CommentVisitor : public CommentVisitorBase<std::add_pointer, ImplClass,
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RetTy, ParamTys...> {};
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template <typename ImplClass, typename RetTy = void, class... ParamTys>
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class ConstCommentVisitor
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: public CommentVisitorBase<llvm::make_const_ptr, ImplClass, RetTy,
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ParamTys...> {};
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} // namespace comments
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} // namespace clang
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#endif // LLVM_CLANG_AST_COMMENTVISITOR_H
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