6024e5c395
clang 20.0.0 (based on r547379) from build 12806354. Bug: http://b/379133546 Test: N/A Change-Id: I2eb8938af55d809de674be63cb30cf27e801862b Upstream-Commit: ad834e67b1105d15ef907f6255d4c96e8e733f57
76 lines
2.6 KiB
C++
76 lines
2.6 KiB
C++
//===- AttrVisitor.h - Visitor for Attr 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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//
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// This file defines the AttrVisitor interface.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_AST_ATTRVISITOR_H
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#define LLVM_CLANG_AST_ATTRVISITOR_H
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#include "clang/AST/Attr.h"
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namespace clang {
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namespace attrvisitor {
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/// A simple visitor class that helps create attribute visitors.
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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 Base {
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public:
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#define PTR(CLASS) typename Ptr<CLASS>::type
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#define DISPATCH(NAME) \
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return static_cast<ImplClass *>(this)->Visit##NAME(static_cast<PTR(NAME)>(A))
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RetTy Visit(PTR(Attr) A) {
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switch (A->getKind()) {
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#define ATTR(NAME) \
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case attr::NAME: \
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DISPATCH(NAME##Attr);
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#include "clang/Basic/AttrList.inc"
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}
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llvm_unreachable("Attr that isn't part of AttrList.inc!");
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}
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// If the implementation chooses not to implement a certain visit
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// method, fall back to the parent.
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#define ATTR(NAME) \
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RetTy Visit##NAME##Attr(PTR(NAME##Attr) A) { DISPATCH(Attr); }
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#include "clang/Basic/AttrList.inc"
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RetTy VisitAttr(PTR(Attr)) { return RetTy(); }
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#undef PTR
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#undef DISPATCH
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};
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} // namespace attrvisitor
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/// A simple visitor class that helps create attribute visitors.
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///
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/// This class does not preserve constness of Attr pointers (see
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/// also ConstAttrVisitor).
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template <typename ImplClass, typename RetTy = void, typename... ParamTys>
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class AttrVisitor : public attrvisitor::Base<std::add_pointer, ImplClass, RetTy,
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ParamTys...> {};
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/// A simple visitor class that helps create attribute visitors.
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///
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/// This class preserves constness of Attr pointers (see also
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/// AttrVisitor).
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template <typename ImplClass, typename RetTy = void, typename... ParamTys>
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class ConstAttrVisitor
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: public attrvisitor::Base<llvm::make_const_ptr, ImplClass, RetTy,
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ParamTys...> {};
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} // namespace clang
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#endif // LLVM_CLANG_AST_ATTRVISITOR_H
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