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//===--- 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/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()) {
default: assert(false && "Decl that isn't part of DeclNodes.def!");
#define DECL(Derived, Base) \
case Decl::Derived: DISPATCH(Derived##Decl, Derived##Decl);
#define ABSTRACT_DECL(Derived, Base)
#include "clang/AST/DeclNodes.def"
}
}
// 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); }
#define ABSTRACT_DECL(Derived, Base) DECL(Derived, Base)
#include "clang/AST/DeclNodes.def"
RetTy VisitDecl(Decl *D) { return RetTy(); }
};
#undef DISPATCH
} // end namespace clang
#endif // LLVM_CLANG_AST_DECLVISITOR_H
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