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54 lines
1.7 KiB
C++
54 lines
1.7 KiB
C++
//===--- DeclVisitor.h - Visitor for Decl subclasses ------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the DeclVisitor interface.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_AST_DECLVISITOR_H
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#define LLVM_CLANG_AST_DECLVISITOR_H
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#include "clang/AST/Decl.h"
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#include "clang/AST/DeclObjC.h"
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#include "clang/AST/DeclCXX.h"
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#include "clang/AST/DeclTemplate.h"
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namespace clang {
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#define DISPATCH(NAME, CLASS) \
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return static_cast<ImplClass*>(this)-> Visit##NAME(static_cast<CLASS*>(D))
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/// \brief A simple visitor class that helps create declaration visitors.
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template<typename ImplClass, typename RetTy=void>
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class DeclVisitor {
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public:
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RetTy Visit(Decl *D) {
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switch (D->getKind()) {
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default: assert(false && "Decl that isn't part of DeclNodes.def!");
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#define DECL(Derived, Base) \
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case Decl::Derived: DISPATCH(Derived##Decl, Derived##Decl);
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#define ABSTRACT_DECL(Derived, Base)
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#include "clang/AST/DeclNodes.def"
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}
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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 DECL(Derived, Base) \
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RetTy Visit##Derived##Decl(Derived##Decl *D) { DISPATCH(Base, Base); }
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#define ABSTRACT_DECL(Derived, Base) DECL(Derived, Base)
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#include "clang/AST/DeclNodes.def"
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RetTy VisitDecl(Decl *D) { return RetTy(); }
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};
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#undef DISPATCH
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} // end namespace clang
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#endif // LLVM_CLANG_AST_DECLVISITOR_H
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