DeclVisitor.h revision c640058aa7f224a71ce3b1d2601d84e1b57f82d3
1b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org//===--- DeclVisitor.h - Visitor for Decl subclasses ------------*- C++ -*-===// 23484964a86451e86dcf04be9bd8c0d76ee04f081rossberg@chromium.org// 33484964a86451e86dcf04be9bd8c0d76ee04f081rossberg@chromium.org// The LLVM Compiler Infrastructure 4b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org// 5b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org// This file is distributed under the University of Illinois Open Source 6b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org// License. See LICENSE.TXT for details. 7b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org// 8b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org//===----------------------------------------------------------------------===// 9b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org// 10b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org// This file defines the DeclVisitor interface. 11b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org// 12b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org//===----------------------------------------------------------------------===// 13b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org#ifndef LLVM_CLANG_AST_DECLVISITOR_H 14b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org#define LLVM_CLANG_AST_DECLVISITOR_H 15b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org 16b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org#include "clang/AST/Decl.h" 17b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org#include "clang/AST/DeclCXX.h" 18b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org#include "clang/AST/DeclFriend.h" 19b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org#include "clang/AST/DeclObjC.h" 20b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org#include "clang/AST/DeclOpenMP.h" 21b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org#include "clang/AST/DeclTemplate.h" 22b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org 23b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.orgnamespace clang { 24b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.orgnamespace declvisitor { 25b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org 26b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.orgtemplate <typename T> struct make_ptr { typedef T *type; }; 27b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.orgtemplate <typename T> struct make_const_ptr { typedef const T *type; }; 28b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org 29b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org/// \brief A simple visitor class that helps create declaration visitors. 30b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.orgtemplate<template <typename> class Ptr, typename ImplClass, typename RetTy=void> 31b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.orgclass Base { 32b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.orgpublic: 33b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org 34b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org#define PTR(CLASS) typename Ptr<CLASS>::type 35b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org#define DISPATCH(NAME, CLASS) \ 36b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org return static_cast<ImplClass*>(this)->Visit##NAME(static_cast<PTR(CLASS)>(D)) 37b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org 38b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org RetTy Visit(PTR(Decl) D) { 39b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org switch (D->getKind()) { 40b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org#define DECL(DERIVED, BASE) \ 41b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org case Decl::DERIVED: DISPATCH(DERIVED##Decl, DERIVED##Decl); 42b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org#define ABSTRACT_DECL(DECL) 43b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org#include "clang/AST/DeclNodes.inc" 44b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org } 45b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org llvm_unreachable("Decl that isn't part of DeclNodes.inc!"); 46b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org } 47b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org 48b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org // If the implementation chooses not to implement a certain visit 49b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org // method, fall back to the parent. 50b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org#define DECL(DERIVED, BASE) \ 51b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org RetTy Visit##DERIVED##Decl(PTR(DERIVED##Decl) D) { DISPATCH(BASE, BASE); } 52b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org#include "clang/AST/DeclNodes.inc" 53b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org 54b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org RetTy VisitDecl(PTR(Decl) D) { return RetTy(); } 55b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org 56b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org#undef PTR 576a4d394882dba70a85567fb90ffd4f428a9eb170machenbach@chromium.org#undef DISPATCH 58b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org}; 59b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org 606a4d394882dba70a85567fb90ffd4f428a9eb170machenbach@chromium.org} // end namespace declvisitor 61b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org 62b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org/// \brief A simple visitor class that helps create declaration visitors. 63b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org/// 646a4d394882dba70a85567fb90ffd4f428a9eb170machenbach@chromium.org/// This class does not preserve constness of Decl pointers (see also 656a4d394882dba70a85567fb90ffd4f428a9eb170machenbach@chromium.org/// ConstDeclVisitor). 666a4d394882dba70a85567fb90ffd4f428a9eb170machenbach@chromium.orgtemplate<typename ImplClass, typename RetTy=void> 676a4d394882dba70a85567fb90ffd4f428a9eb170machenbach@chromium.orgclass DeclVisitor 68b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org : public declvisitor::Base<declvisitor::make_ptr, ImplClass, RetTy> {}; 69b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org 70b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org/// \brief A simple visitor class that helps create declaration visitors. 71b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org/// 72b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org/// This class preserves constness of Decl pointers (see also DeclVisitor). 73b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.orgtemplate<typename ImplClass, typename RetTy=void> 74b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.orgclass ConstDeclVisitor 75b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org : public declvisitor::Base<declvisitor::make_const_ptr, ImplClass, RetTy> {}; 76b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org 77b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org} // end namespace clang 78b67f96038c787a6bd6a835e6c436c82e1b245486machenbach@chromium.org 79#endif // LLVM_CLANG_AST_DECLVISITOR_H 80