#pragma once #ifdef __GNUC__ #pragma GCC diagnostic push #pragma GCC diagnostic ignored "-Wunused-parameter" #endif //===- AttrVisitor.h - Visitor for Attr subclasses --------------*- C++ -*-===// // // 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 // //===----------------------------------------------------------------------===// // // This file defines the AttrVisitor interface. // //===----------------------------------------------------------------------===// #ifndef LLVM_CLANG_AST_ATTRVISITOR_H #define LLVM_CLANG_AST_ATTRVISITOR_H #include "clang/AST/Attr.h" namespace clang { namespace attrvisitor { /// A simple visitor class that helps create attribute visitors. template <template <typename> class Ptr, typename ImplClass, typename RetTy = void, class... ParamTys> class Base { public: #define PTR(CLASS) typename Ptr<CLASS>::type #define DISPATCH(NAME) \ return static_cast<ImplClass *>(this)->Visit##NAME(static_cast<PTR(NAME)>(A)) RetTy Visit(PTR(Attr) A) { switch (A->getKind()) { #define ATTR(NAME) \ case attr::NAME: \ DISPATCH(NAME##Attr); #include "clang/Basic/AttrList.inc" } llvm_unreachable("Attr that isn't part of AttrList.inc!"); } // If the implementation chooses not to implement a certain visit // method, fall back to the parent. #define ATTR(NAME) \ RetTy Visit##NAME##Attr(PTR(NAME##Attr) A) { DISPATCH(Attr); } #include "clang/Basic/AttrList.inc" RetTy VisitAttr(PTR(Attr)) { return RetTy(); } #undef PTR #undef DISPATCH }; } // namespace attrvisitor /// A simple visitor class that helps create attribute visitors. /// /// This class does not preserve constness of Attr pointers (see /// also ConstAttrVisitor). template <typename ImplClass, typename RetTy = void, typename... ParamTys> class AttrVisitor : public attrvisitor::Base<std::add_pointer, ImplClass, RetTy, ParamTys...> {}; /// A simple visitor class that helps create attribute visitors. /// /// This class preserves constness of Attr pointers (see also /// AttrVisitor). template <typename ImplClass, typename RetTy = void, typename... ParamTys> class ConstAttrVisitor : public attrvisitor::Base<llvm::make_const_ptr, ImplClass, RetTy, ParamTys...> {}; } // namespace clang #endif // LLVM_CLANG_AST_ATTRVISITOR_H #ifdef __GNUC__ #pragma GCC diagnostic pop #endif