| //===--- DeclVisitor.h - Visitor for Decl subclasses ------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file defines the DeclVisitor interface. |
| // |
| //===----------------------------------------------------------------------===// |
| #ifndef LLVM_CLANG_AST_DECLVISITOR_H |
| #define LLVM_CLANG_AST_DECLVISITOR_H |
| |
| #include "clang/AST/Decl.h" |
| #include "clang/AST/DeclObjC.h" |
| #include "clang/AST/DeclCXX.h" |
| #include "clang/AST/DeclFriend.h" |
| #include "clang/AST/DeclTemplate.h" |
| |
| namespace clang { |
| |
| #define DISPATCH(NAME, CLASS) \ |
| return static_cast<ImplClass*>(this)-> Visit##NAME(static_cast<CLASS*>(D)) |
| |
| /// \brief A simple visitor class that helps create declaration visitors. |
| template<typename ImplClass, typename RetTy=void> |
| class DeclVisitor { |
| public: |
| RetTy Visit(Decl *D) { |
| switch (D->getKind()) { |
| #define DECL(DERIVED, BASE) \ |
| case Decl::DERIVED: DISPATCH(DERIVED##Decl, DERIVED##Decl); |
| #define ABSTRACT_DECL(DECL) |
| #include "clang/AST/DeclNodes.inc" |
| } |
| llvm_unreachable("Decl that isn't part of DeclNodes.inc!"); |
| } |
| |
| // If the implementation chooses not to implement a certain visit |
| // method, fall back to the parent. |
| #define DECL(DERIVED, BASE) \ |
| RetTy Visit##DERIVED##Decl(DERIVED##Decl *D) { DISPATCH(BASE, BASE); } |
| #include "clang/AST/DeclNodes.inc" |
| |
| RetTy VisitDecl(Decl *D) { return RetTy(); } |
| }; |
| |
| #undef DISPATCH |
| |
| } // end namespace clang |
| |
| #endif // LLVM_CLANG_AST_DECLVISITOR_H |