lib/Frontend/ASTConsumers.cpp - clang - Git at Google

 //===--- ASTConsumers.cpp - ASTConsumer implementations -------------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // AST Consumer Implementations.
 //
 //===----------------------------------------------------------------------===//

 #include "clang/Frontend/ASTConsumers.h"
 #include "clang/Frontend/DocumentXML.h"
 #include "clang/Frontend/PathDiagnosticClients.h"
 #include "clang/Basic/Diagnostic.h"
 #include "clang/Basic/SourceManager.h"
 #include "clang/Basic/FileManager.h"
 #include "clang/AST/AST.h"
 #include "clang/AST/ASTConsumer.h"
 #include "clang/AST/ASTContext.h"
 #include "clang/AST/RecordLayout.h"
 #include "clang/AST/PrettyPrinter.h"
 #include "clang/CodeGen/ModuleBuilder.h"
 #include "llvm/Module.h"
 #include "llvm/Support/Format.h"
 #include "llvm/Support/Timer.h"
 #include "llvm/Support/raw_ostream.h"
 #include "llvm/System/Path.h"
 using namespace clang;

 //===----------------------------------------------------------------------===//
 /// ASTPrinter - Pretty-printer and dumper of ASTs

 namespace {
   class ASTPrinter : public ASTConsumer {
     llvm::raw_ostream &Out;
     bool Dump;

   public:
     ASTPrinter(llvm::raw_ostream* o = NULL, bool Dump = false)
       : Out(o? *o : llvm::errs()), Dump(Dump) { }

     virtual void HandleTranslationUnit(ASTContext &Context) {
       PrintingPolicy Policy = Context.PrintingPolicy;
       Policy.Dump = Dump;
       Context.getTranslationUnitDecl()->print(Out, Policy);
     }
   };
 } // end anonymous namespace

 ASTConsumer *clang::CreateASTPrinter(llvm::raw_ostream* out) {
   return new ASTPrinter(out);
 }

 //===----------------------------------------------------------------------===//
 /// ASTPrinterXML - XML-printer of ASTs

 namespace {
   class ASTPrinterXML : public ASTConsumer {
     DocumentXML         Doc;

   public:
     ASTPrinterXML(llvm::raw_ostream& o) : Doc("CLANG_XML", o) {}

     void Initialize(ASTContext &Context) {
       Doc.initialize(Context);
     }

     virtual void HandleTranslationUnit(ASTContext &Ctx) {
       Doc.addSubNode("TranslationUnit");
       for (DeclContext::decl_iterator
              D = Ctx.getTranslationUnitDecl()->decls_begin(),
              DEnd = Ctx.getTranslationUnitDecl()->decls_end();
            D != DEnd;
            ++D)
         Doc.PrintDecl(*D);
       Doc.toParent();
       Doc.finalize();
     }
   };
 } // end anonymous namespace


 ASTConsumer *clang::CreateASTPrinterXML(llvm::raw_ostream* out) {
   return new ASTPrinterXML(out ? *out : llvm::outs());
 }

 ASTConsumer *clang::CreateASTDumper() {
   return new ASTPrinter(0, true);
 }

 //===----------------------------------------------------------------------===//
 /// ASTViewer - AST Visualization

 namespace {
   class ASTViewer : public ASTConsumer {
     ASTContext *Context;
   public:
     void Initialize(ASTContext &Context) {
       this->Context = &Context;
     }

     virtual void HandleTopLevelDecl(DeclGroupRef D) {
       for (DeclGroupRef::iterator I = D.begin(), E = D.end(); I != E; ++I)
         HandleTopLevelSingleDecl(*I);
     }

     void HandleTopLevelSingleDecl(Decl *D);
   };
 }

 void ASTViewer::HandleTopLevelSingleDecl(Decl *D) {
   if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
     FD->print(llvm::errs());

     if (Stmt *Body = FD->getBody()) {
       llvm::errs() << '\n';
       Body->viewAST();
       llvm::errs() << '\n';
     }
     return;
   }

   if (ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(D)) {
     MD->print(llvm::errs());

     if (MD->getBody()) {
       llvm::errs() << '\n';
       MD->getBody()->viewAST();
       llvm::errs() << '\n';
     }
   }
 }


 ASTConsumer *clang::CreateASTViewer() { return new ASTViewer(); }

 //===----------------------------------------------------------------------===//
 /// DeclContextPrinter - Decl and DeclContext Visualization

 namespace {

 class DeclContextPrinter : public ASTConsumer {
   llvm::raw_ostream& Out;
 public:
   DeclContextPrinter() : Out(llvm::errs()) {}

   void HandleTranslationUnit(ASTContext &C) {
     PrintDeclContext(C.getTranslationUnitDecl(), 4);
   }

   void PrintDeclContext(const DeclContext* DC, unsigned Indentation);
 };
 }  // end anonymous namespace

 void DeclContextPrinter::PrintDeclContext(const DeclContext* DC,
                                           unsigned Indentation) {
   // Print DeclContext name.
   switch (DC->getDeclKind()) {
   case Decl::TranslationUnit:
     Out << "[translation unit] " << DC;
     break;
   case Decl::Namespace: {
     Out << "[namespace] ";
     const NamespaceDecl* ND = cast<NamespaceDecl>(DC);
     Out << ND->getNameAsString();
     break;
   }
   case Decl::Enum: {
     const EnumDecl* ED = cast<EnumDecl>(DC);
     if (ED->isDefinition())
       Out << "[enum] ";
     else
       Out << "<enum> ";
     Out << ED->getNameAsString();
     break;
   }
   case Decl::Record: {
     const RecordDecl* RD = cast<RecordDecl>(DC);
     if (RD->isDefinition())
       Out << "[struct] ";
     else
       Out << "<struct> ";
     Out << RD->getNameAsString();
     break;
   }
   case Decl::CXXRecord: {
     const CXXRecordDecl* RD = cast<CXXRecordDecl>(DC);
     if (RD->isDefinition())
       Out << "[class] ";
     else
       Out << "<class> ";
     Out << RD->getNameAsString() << " " << DC;
     break;
   }
   case Decl::ObjCMethod:
     Out << "[objc method]";
     break;
   case Decl::ObjCInterface:
     Out << "[objc interface]";
     break;
   case Decl::ObjCCategory:
     Out << "[objc category]";
     break;
   case Decl::ObjCProtocol:
     Out << "[objc protocol]";
     break;
   case Decl::ObjCImplementation:
     Out << "[objc implementation]";
     break;
   case Decl::ObjCCategoryImpl:
     Out << "[objc categoryimpl]";
     break;
   case Decl::LinkageSpec:
     Out << "[linkage spec]";
     break;
   case Decl::Block:
     Out << "[block]";
     break;
   case Decl::Function: {
     const FunctionDecl* FD = cast<FunctionDecl>(DC);
     if (FD->isThisDeclarationADefinition())
       Out << "[function] ";
     else
       Out << "<function> ";
     Out << FD->getNameAsString();
     // Print the parameters.
     Out << "(";
     bool PrintComma = false;
     for (FunctionDecl::param_const_iterator I = FD->param_begin(),
            E = FD->param_end(); I != E; ++I) {
       if (PrintComma)
         Out << ", ";
       else
         PrintComma = true;
       Out << (*I)->getNameAsString();
     }
     Out << ")";
     break;
   }
   case Decl::CXXMethod: {
     const CXXMethodDecl* D = cast<CXXMethodDecl>(DC);
     if (D->isOutOfLine())
       Out << "[c++ method] ";
     else if (D->isImplicit())
       Out << "(c++ method) ";
     else
       Out << "<c++ method> ";
     Out << D->getNameAsString();
     // Print the parameters.
     Out << "(";
     bool PrintComma = false;
     for (FunctionDecl::param_const_iterator I = D->param_begin(),
            E = D->param_end(); I != E; ++I) {
       if (PrintComma)
         Out << ", ";
       else
         PrintComma = true;
       Out << (*I)->getNameAsString();
     }
     Out << ")";

     // Check the semantic DeclContext.
     const DeclContext* SemaDC = D->getDeclContext();
     const DeclContext* LexicalDC = D->getLexicalDeclContext();
     if (SemaDC != LexicalDC)
       Out << " [[" << SemaDC << "]]";

     break;
   }
   case Decl::CXXConstructor: {
     const CXXConstructorDecl* D = cast<CXXConstructorDecl>(DC);
     if (D->isOutOfLine())
       Out << "[c++ ctor] ";
     else if (D->isImplicit())
       Out << "(c++ ctor) ";
     else
       Out << "<c++ ctor> ";
     Out << D->getNameAsString();
     // Print the parameters.
     Out << "(";
     bool PrintComma = false;
     for (FunctionDecl::param_const_iterator I = D->param_begin(),
            E = D->param_end(); I != E; ++I) {
       if (PrintComma)
         Out << ", ";
       else
         PrintComma = true;
       Out << (*I)->getNameAsString();
     }
     Out << ")";

     // Check the semantic DC.
     const DeclContext* SemaDC = D->getDeclContext();
     const DeclContext* LexicalDC = D->getLexicalDeclContext();
     if (SemaDC != LexicalDC)
       Out << " [[" << SemaDC << "]]";
     break;
   }
   case Decl::CXXDestructor: {
     const CXXDestructorDecl* D = cast<CXXDestructorDecl>(DC);
     if (D->isOutOfLine())
       Out << "[c++ dtor] ";
     else if (D->isImplicit())
       Out << "(c++ dtor) ";
     else
       Out << "<c++ dtor> ";
     Out << D->getNameAsString();
     // Check the semantic DC.
     const DeclContext* SemaDC = D->getDeclContext();
     const DeclContext* LexicalDC = D->getLexicalDeclContext();
     if (SemaDC != LexicalDC)
       Out << " [[" << SemaDC << "]]";
     break;
   }
   case Decl::CXXConversion: {
     const CXXConversionDecl* D = cast<CXXConversionDecl>(DC);
     if (D->isOutOfLine())
       Out << "[c++ conversion] ";
     else if (D->isImplicit())
       Out << "(c++ conversion) ";
     else
       Out << "<c++ conversion> ";
     Out << D->getNameAsString();
     // Check the semantic DC.
     const DeclContext* SemaDC = D->getDeclContext();
     const DeclContext* LexicalDC = D->getLexicalDeclContext();
     if (SemaDC != LexicalDC)
       Out << " [[" << SemaDC << "]]";
     break;
   }

   default:
     assert(0 && "a decl that inherits DeclContext isn't handled");
   }

   Out << "\n";

   // Print decls in the DeclContext.
   for (DeclContext::decl_iterator I = DC->decls_begin(), E = DC->decls_end();
        I != E; ++I) {
     for (unsigned i = 0; i < Indentation; ++i)
       Out << "  ";

     Decl::Kind DK = I->getKind();
     switch (DK) {
     case Decl::Namespace:
     case Decl::Enum:
     case Decl::Record:
     case Decl::CXXRecord:
     case Decl::ObjCMethod:
     case Decl::ObjCInterface:
     case Decl::ObjCCategory:
     case Decl::ObjCProtocol:
     case Decl::ObjCImplementation:
     case Decl::ObjCCategoryImpl:
     case Decl::LinkageSpec:
     case Decl::Block:
     case Decl::Function:
     case Decl::CXXMethod:
     case Decl::CXXConstructor:
     case Decl::CXXDestructor:
     case Decl::CXXConversion:
     {
       DeclContext* DC = cast<DeclContext>(*I);
       PrintDeclContext(DC, Indentation+2);
       break;
     }
     case Decl::Field: {
       FieldDecl* FD = cast<FieldDecl>(*I);
       Out << "<field> " << FD->getNameAsString() << "\n";
       break;
     }
     case Decl::Typedef: {
       TypedefDecl* TD = cast<TypedefDecl>(*I);
       Out << "<typedef> " << TD->getNameAsString() << "\n";
       break;
     }
     case Decl::EnumConstant: {
       EnumConstantDecl* ECD = cast<EnumConstantDecl>(*I);
       Out << "<enum constant> " << ECD->getNameAsString() << "\n";
       break;
     }
     case Decl::Var: {
       VarDecl* VD = cast<VarDecl>(*I);
       Out << "<var> " << VD->getNameAsString() << "\n";
       break;
     }
     case Decl::ImplicitParam: {
       ImplicitParamDecl* IPD = cast<ImplicitParamDecl>(*I);
       Out << "<implicit parameter> " << IPD->getNameAsString() << "\n";
       break;
     }
     case Decl::ParmVar: {
       ParmVarDecl* PVD = cast<ParmVarDecl>(*I);
       Out << "<parameter> " << PVD->getNameAsString() << "\n";
       break;
     }
     case Decl::ObjCProperty: {
       ObjCPropertyDecl* OPD = cast<ObjCPropertyDecl>(*I);
       Out << "<objc property> " << OPD->getNameAsString() << "\n";
       break;
     }
     case Decl::FunctionTemplate: {
       FunctionTemplateDecl* FTD = cast<FunctionTemplateDecl>(*I);
       Out << "<function template> " << FTD->getNameAsString() << "\n";
       break;
     }
     case Decl::FileScopeAsm: {
       Out << "<file-scope asm>\n";
       break;
     }
     case Decl::UsingDirective: {
       Out << "<using directive>\n";
       break;
     }
     case Decl::NamespaceAlias: {
       NamespaceAliasDecl* NAD = cast<NamespaceAliasDecl>(*I);
       Out << "<namespace alias> " << NAD->getNameAsString() << "\n";
       break;
     }
     case Decl::ClassTemplate: {
       ClassTemplateDecl *CTD = cast<ClassTemplateDecl>(*I);
       Out << "<class template> " << CTD->getNameAsString() << '\n';
       break;
     }
     default:
       Out << "DeclKind: " << DK << '"' << I->getDeclKindName() << "\"\n";
       assert(0 && "decl unhandled");
     }
   }
 }
 ASTConsumer *clang::CreateDeclContextPrinter() {
   return new DeclContextPrinter();
 }

 //===----------------------------------------------------------------------===//
 /// RecordLayoutDumper - C++ Record Layout Dumping.
 namespace {
 class RecordLayoutDumper : public ASTConsumer {
   llvm::raw_ostream& Out;

   void PrintOffset(uint64_t Offset, unsigned IndentLevel) {
     Out << llvm::format("%4d | ", Offset);
     for (unsigned I = 0; I < IndentLevel * 2; ++I) Out << ' ';
   }

   void DumpRecordLayoutOffsets(const CXXRecordDecl *RD, ASTContext &C,
                                uint64_t Offset,
                                unsigned IndentLevel, const char* Description,
                                bool IncludeVirtualBases) {
     const ASTRecordLayout &Info = C.getASTRecordLayout(RD);

     PrintOffset(Offset, IndentLevel);
     Out << C.getTypeDeclType((CXXRecordDecl *)RD).getAsString();
     if (Description)
       Out << ' ' << Description;
     if (RD->isEmpty())
       Out << " (empty)";
     Out << '\n';

     IndentLevel++;

     const CXXRecordDecl *PrimaryBase = Info.getPrimaryBase();

     // Vtable pointer.
     if (RD->isDynamicClass() && !PrimaryBase) {
       PrintOffset(Offset, IndentLevel);
       Out << '(' << RD->getNameAsString() << " vtable pointer)\n";
     }
     // Dump (non-virtual) bases
     for (CXXRecordDecl::base_class_const_iterator I = RD->bases_begin(),
          E = RD->bases_end(); I != E; ++I) {
       assert(!I->getType()->isDependentType() &&
              "Cannot layout class with dependent bases.");
       if (I->isVirtual())
         continue;

       const CXXRecordDecl *Base =
         cast<CXXRecordDecl>(I->getType()->getAs<RecordType>()->getDecl());

       uint64_t BaseOffset = Offset + Info.getBaseClassOffset(Base) / 8;

       DumpRecordLayoutOffsets(Base, C, BaseOffset, IndentLevel,
                               Base == PrimaryBase ? "(primary base)" : "(base)",
                               /*IncludeVirtualBases=*/false);
     }

     // Dump fields.
     uint64_t FieldNo = 0;
     for (CXXRecordDecl::field_iterator I = RD->field_begin(),
          E = RD->field_end(); I != E; ++I, ++FieldNo) {
       const FieldDecl *Field = *I;
       uint64_t FieldOffset = Offset + Info.getFieldOffset(FieldNo) / 8;

       if (const RecordType *RT = Field->getType()->getAs<RecordType>()) {
         if (const CXXRecordDecl *D = dyn_cast<CXXRecordDecl>(RT->getDecl())) {
           DumpRecordLayoutOffsets(D, C, FieldOffset, IndentLevel,
                                   Field->getNameAsCString(),
                                   /*IncludeVirtualBases=*/true);
           continue;
         }
       }

       PrintOffset(FieldOffset, IndentLevel);
       Out << Field->getType().getAsString() << ' ';
       Out << Field->getNameAsString() << '\n';
     }

     if (!IncludeVirtualBases)
       return;

     // Dump virtual bases.
     for (CXXRecordDecl::base_class_const_iterator I = RD->vbases_begin(),
          E = RD->vbases_end(); I != E; ++I) {
       assert(I->isVirtual() && "Found non-virtual class!");
       const CXXRecordDecl *VBase =
         cast<CXXRecordDecl>(I->getType()->getAs<RecordType>()->getDecl());

       uint64_t VBaseOffset = Offset + Info.getVBaseClassOffset(VBase) / 8;
       DumpRecordLayoutOffsets(VBase, C, VBaseOffset, IndentLevel,
                               VBase == PrimaryBase ?
                               "(primary virtual base)" : "(virtual base)",
                               /*IncludeVirtualBases=*/false);
     }
   }

   // FIXME: Maybe this could be useful in ASTContext.cpp.
   void DumpRecordLayout(const CXXRecordDecl *RD, ASTContext &C) {
     const ASTRecordLayout &Info = C.getASTRecordLayout(RD);

     DumpRecordLayoutOffsets(RD, C, 0, 0, 0,
                             /*IncludeVirtualBases=*/true);
     Out << "  sizeof=" << Info.getSize() / 8;
     Out << ", dsize=" << Info.getDataSize() / 8;
     Out << ", align=" << Info.getAlignment() / 8 << '\n';
     Out << "  nvsize=" << Info.getNonVirtualSize() / 8;
     Out << ", nvalign=" << Info.getNonVirtualAlign() / 8 << '\n';
     Out << '\n';
   }

 public:
   RecordLayoutDumper() : Out(llvm::errs()) {}

   void HandleTranslationUnit(ASTContext &C) {
     for (ASTContext::type_iterator I = C.types_begin(), E = C.types_end();
          I != E; ++I) {
       const RecordType *RT = dyn_cast<RecordType>(*I);
       if (!RT)
         continue;

       const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(RT->getDecl());
       if (!RD)
         continue;

       if (RD->isImplicit())
         continue;

       if (RD->isDependentType())
         continue;

       if (RD->isInvalidDecl())
         continue;

       if (!RD->getDefinition())
         continue;

       // FIXME: Do we really need to hard code this?
       if (RD->getQualifiedNameAsString() == "__va_list_tag")
         continue;

       DumpRecordLayout(RD, C);
    }
   }
 };
 } // end anonymous namespace
 ASTConsumer *clang::CreateRecordLayoutDumper() {
   return new RecordLayoutDumper();
 }

 //===----------------------------------------------------------------------===//
 /// InheritanceViewer - C++ Inheritance Visualization

 namespace {
 class InheritanceViewer : public ASTConsumer {
   const std::string clsname;
 public:
   InheritanceViewer(const std::string& cname) : clsname(cname) {}

   void HandleTranslationUnit(ASTContext &C) {
     for (ASTContext::type_iterator I=C.types_begin(),E=C.types_end(); I!=E; ++I)
       if (RecordType *T = dyn_cast<RecordType>(*I)) {
         if (CXXRecordDecl *D = dyn_cast<CXXRecordDecl>(T->getDecl())) {
           // FIXME: This lookup needs to be generalized to handle namespaces and
           // (when we support them) templates.
           if (D->getNameAsString() == clsname) {
             D->viewInheritance(C);
           }
         }
       }
   }
 };
 }

 ASTConsumer *clang::CreateInheritanceViewer(const std::string& clsname) {
   return new InheritanceViewer(clsname);
 }
	//===--- ASTConsumers.cpp - ASTConsumer implementations -------------------===//
	//
	// The LLVM Compiler Infrastructure
	//
	// This file is distributed under the University of Illinois Open Source
	// License. See LICENSE.TXT for details.
	//
	//===----------------------------------------------------------------------===//
	//
	// AST Consumer Implementations.
	//
	//===----------------------------------------------------------------------===//

	#include "clang/Frontend/ASTConsumers.h"
	#include "clang/Frontend/DocumentXML.h"
	#include "clang/Frontend/PathDiagnosticClients.h"
	#include "clang/Basic/Diagnostic.h"
	#include "clang/Basic/SourceManager.h"
	#include "clang/Basic/FileManager.h"
	#include "clang/AST/AST.h"
	#include "clang/AST/ASTConsumer.h"
	#include "clang/AST/ASTContext.h"
	#include "clang/AST/RecordLayout.h"
	#include "clang/AST/PrettyPrinter.h"
	#include "clang/CodeGen/ModuleBuilder.h"
	#include "llvm/Module.h"
	#include "llvm/Support/Format.h"
	#include "llvm/Support/Timer.h"
	#include "llvm/Support/raw_ostream.h"
	#include "llvm/System/Path.h"
	using namespace clang;

	//===----------------------------------------------------------------------===//
	/// ASTPrinter - Pretty-printer and dumper of ASTs

	namespace {
	class ASTPrinter : public ASTConsumer {
	llvm::raw_ostream &Out;
	bool Dump;

	public:
	ASTPrinter(llvm::raw_ostream* o = NULL, bool Dump = false)
	: Out(o? *o : llvm::errs()), Dump(Dump) { }

	virtual void HandleTranslationUnit(ASTContext &Context) {
	PrintingPolicy Policy = Context.PrintingPolicy;
	Policy.Dump = Dump;
	Context.getTranslationUnitDecl()->print(Out, Policy);
	}
	};
	} // end anonymous namespace

	ASTConsumer clang::CreateASTPrinter(llvm::raw_ostream out) {
	return new ASTPrinter(out);
	}

	//===----------------------------------------------------------------------===//
	/// ASTPrinterXML - XML-printer of ASTs

	namespace {
	class ASTPrinterXML : public ASTConsumer {
	DocumentXML Doc;

	public:
	ASTPrinterXML(llvm::raw_ostream& o) : Doc("CLANG_XML", o) {}

	void Initialize(ASTContext &Context) {
	Doc.initialize(Context);
	}

	virtual void HandleTranslationUnit(ASTContext &Ctx) {
	Doc.addSubNode("TranslationUnit");
	for (DeclContext::decl_iterator
	D = Ctx.getTranslationUnitDecl()->decls_begin(),
	DEnd = Ctx.getTranslationUnitDecl()->decls_end();
	D != DEnd;
	++D)
	Doc.PrintDecl(*D);
	Doc.toParent();
	Doc.finalize();
	}
	};
	} // end anonymous namespace


	ASTConsumer clang::CreateASTPrinterXML(llvm::raw_ostream out) {
	return new ASTPrinterXML(out ? *out : llvm::outs());
	}

	ASTConsumer *clang::CreateASTDumper() {
	return new ASTPrinter(0, true);
	}

	//===----------------------------------------------------------------------===//
	/// ASTViewer - AST Visualization

	namespace {
	class ASTViewer : public ASTConsumer {
	ASTContext *Context;
	public:
	void Initialize(ASTContext &Context) {
	this->Context = &Context;
	}

	virtual void HandleTopLevelDecl(DeclGroupRef D) {
	for (DeclGroupRef::iterator I = D.begin(), E = D.end(); I != E; ++I)
	HandleTopLevelSingleDecl(*I);
	}

	void HandleTopLevelSingleDecl(Decl *D);
	};
	}

	void ASTViewer::HandleTopLevelSingleDecl(Decl *D) {
	if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
	FD->print(llvm::errs());

	if (Stmt *Body = FD->getBody()) {
	llvm::errs() << '\n';
	Body->viewAST();
	llvm::errs() << '\n';
	}
	return;
	}

	if (ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(D)) {
	MD->print(llvm::errs());

	if (MD->getBody()) {
	llvm::errs() << '\n';
	MD->getBody()->viewAST();
	llvm::errs() << '\n';
	}
	}
	}


	ASTConsumer *clang::CreateASTViewer() { return new ASTViewer(); }

	//===----------------------------------------------------------------------===//
	/// DeclContextPrinter - Decl and DeclContext Visualization

	namespace {

	class DeclContextPrinter : public ASTConsumer {
	llvm::raw_ostream& Out;
	public:
	DeclContextPrinter() : Out(llvm::errs()) {}

	void HandleTranslationUnit(ASTContext &C) {
	PrintDeclContext(C.getTranslationUnitDecl(), 4);
	}

	void PrintDeclContext(const DeclContext* DC, unsigned Indentation);
	};
	} // end anonymous namespace

	void DeclContextPrinter::PrintDeclContext(const DeclContext* DC,
	unsigned Indentation) {
	// Print DeclContext name.
	switch (DC->getDeclKind()) {
	case Decl::TranslationUnit:
	Out << "[translation unit] " << DC;
	break;
	case Decl::Namespace: {
	Out << "[namespace] ";
	const NamespaceDecl* ND = cast<NamespaceDecl>(DC);
	Out << ND->getNameAsString();
	break;
	}
	case Decl::Enum: {
	const EnumDecl* ED = cast<EnumDecl>(DC);
	if (ED->isDefinition())
	Out << "[enum] ";
	else
	Out << "<enum> ";
	Out << ED->getNameAsString();
	break;
	}
	case Decl::Record: {
	const RecordDecl* RD = cast<RecordDecl>(DC);
	if (RD->isDefinition())
	Out << "[struct] ";
	else
	Out << "<struct> ";
	Out << RD->getNameAsString();
	break;
	}
	case Decl::CXXRecord: {
	const CXXRecordDecl* RD = cast<CXXRecordDecl>(DC);
	if (RD->isDefinition())
	Out << "[class] ";
	else
	Out << "<class> ";
	Out << RD->getNameAsString() << " " << DC;
	break;
	}
	case Decl::ObjCMethod:
	Out << "[objc method]";
	break;
	case Decl::ObjCInterface:
	Out << "[objc interface]";
	break;
	case Decl::ObjCCategory:
	Out << "[objc category]";
	break;
	case Decl::ObjCProtocol:
	Out << "[objc protocol]";
	break;
	case Decl::ObjCImplementation:
	Out << "[objc implementation]";
	break;
	case Decl::ObjCCategoryImpl:
	Out << "[objc categoryimpl]";
	break;
	case Decl::LinkageSpec:
	Out << "[linkage spec]";
	break;
	case Decl::Block:
	Out << "[block]";
	break;
	case Decl::Function: {
	const FunctionDecl* FD = cast<FunctionDecl>(DC);
	if (FD->isThisDeclarationADefinition())
	Out << "[function] ";
	else
	Out << "<function> ";
	Out << FD->getNameAsString();
	// Print the parameters.
	Out << "(";
	bool PrintComma = false;
	for (FunctionDecl::param_const_iterator I = FD->param_begin(),
	E = FD->param_end(); I != E; ++I) {
	if (PrintComma)
	Out << ", ";
	else
	PrintComma = true;
	Out << (*I)->getNameAsString();
	}
	Out << ")";
	break;
	}
	case Decl::CXXMethod: {
	const CXXMethodDecl* D = cast<CXXMethodDecl>(DC);
	if (D->isOutOfLine())
	Out << "[c++ method] ";
	else if (D->isImplicit())
	Out << "(c++ method) ";
	else
	Out << "<c++ method> ";
	Out << D->getNameAsString();
	// Print the parameters.
	Out << "(";
	bool PrintComma = false;
	for (FunctionDecl::param_const_iterator I = D->param_begin(),
	E = D->param_end(); I != E; ++I) {
	if (PrintComma)
	Out << ", ";
	else
	PrintComma = true;
	Out << (*I)->getNameAsString();
	}
	Out << ")";

	// Check the semantic DeclContext.
	const DeclContext* SemaDC = D->getDeclContext();
	const DeclContext* LexicalDC = D->getLexicalDeclContext();
	if (SemaDC != LexicalDC)
	Out << " [[" << SemaDC << "]]";

	break;
	}
	case Decl::CXXConstructor: {
	const CXXConstructorDecl* D = cast<CXXConstructorDecl>(DC);
	if (D->isOutOfLine())
	Out << "[c++ ctor] ";
	else if (D->isImplicit())
	Out << "(c++ ctor) ";
	else
	Out << "<c++ ctor> ";
	Out << D->getNameAsString();
	// Print the parameters.
	Out << "(";
	bool PrintComma = false;
	for (FunctionDecl::param_const_iterator I = D->param_begin(),
	E = D->param_end(); I != E; ++I) {
	if (PrintComma)
	Out << ", ";
	else
	PrintComma = true;
	Out << (*I)->getNameAsString();
	}
	Out << ")";

	// Check the semantic DC.
	const DeclContext* SemaDC = D->getDeclContext();
	const DeclContext* LexicalDC = D->getLexicalDeclContext();
	if (SemaDC != LexicalDC)
	Out << " [[" << SemaDC << "]]";
	break;
	}
	case Decl::CXXDestructor: {
	const CXXDestructorDecl* D = cast<CXXDestructorDecl>(DC);
	if (D->isOutOfLine())
	Out << "[c++ dtor] ";
	else if (D->isImplicit())
	Out << "(c++ dtor) ";
	else
	Out << "<c++ dtor> ";
	Out << D->getNameAsString();
	// Check the semantic DC.
	const DeclContext* SemaDC = D->getDeclContext();
	const DeclContext* LexicalDC = D->getLexicalDeclContext();
	if (SemaDC != LexicalDC)
	Out << " [[" << SemaDC << "]]";
	break;
	}
	case Decl::CXXConversion: {
	const CXXConversionDecl* D = cast<CXXConversionDecl>(DC);
	if (D->isOutOfLine())
	Out << "[c++ conversion] ";
	else if (D->isImplicit())
	Out << "(c++ conversion) ";
	else
	Out << "<c++ conversion> ";
	Out << D->getNameAsString();
	// Check the semantic DC.
	const DeclContext* SemaDC = D->getDeclContext();
	const DeclContext* LexicalDC = D->getLexicalDeclContext();
	if (SemaDC != LexicalDC)
	Out << " [[" << SemaDC << "]]";
	break;
	}

	default:
	assert(0 && "a decl that inherits DeclContext isn't handled");
	}

	Out << "\n";

	// Print decls in the DeclContext.
	for (DeclContext::decl_iterator I = DC->decls_begin(), E = DC->decls_end();
	I != E; ++I) {
	for (unsigned i = 0; i < Indentation; ++i)
	Out << " ";

	Decl::Kind DK = I->getKind();
	switch (DK) {
	case Decl::Namespace:
	case Decl::Enum:
	case Decl::Record:
	case Decl::CXXRecord:
	case Decl::ObjCMethod:
	case Decl::ObjCInterface:
	case Decl::ObjCCategory:
	case Decl::ObjCProtocol:
	case Decl::ObjCImplementation:
	case Decl::ObjCCategoryImpl:
	case Decl::LinkageSpec:
	case Decl::Block:
	case Decl::Function:
	case Decl::CXXMethod:
	case Decl::CXXConstructor:
	case Decl::CXXDestructor:
	case Decl::CXXConversion:
	{
	DeclContext* DC = cast<DeclContext>(*I);
	PrintDeclContext(DC, Indentation+2);
	break;
	}
	case Decl::Field: {
	FieldDecl* FD = cast<FieldDecl>(*I);
	Out << "<field> " << FD->getNameAsString() << "\n";
	break;
	}
	case Decl::Typedef: {
	TypedefDecl* TD = cast<TypedefDecl>(*I);
	Out << "<typedef> " << TD->getNameAsString() << "\n";
	break;
	}
	case Decl::EnumConstant: {
	EnumConstantDecl* ECD = cast<EnumConstantDecl>(*I);
	Out << "<enum constant> " << ECD->getNameAsString() << "\n";
	break;
	}
	case Decl::Var: {
	VarDecl* VD = cast<VarDecl>(*I);
	Out << "<var> " << VD->getNameAsString() << "\n";
	break;
	}
	case Decl::ImplicitParam: {
	ImplicitParamDecl* IPD = cast<ImplicitParamDecl>(*I);
	Out << "<implicit parameter> " << IPD->getNameAsString() << "\n";
	break;
	}
	case Decl::ParmVar: {
	ParmVarDecl* PVD = cast<ParmVarDecl>(*I);
	Out << "<parameter> " << PVD->getNameAsString() << "\n";
	break;
	}
	case Decl::ObjCProperty: {
	ObjCPropertyDecl* OPD = cast<ObjCPropertyDecl>(*I);
	Out << "<objc property> " << OPD->getNameAsString() << "\n";
	break;
	}
	case Decl::FunctionTemplate: {
	FunctionTemplateDecl* FTD = cast<FunctionTemplateDecl>(*I);
	Out << "<function template> " << FTD->getNameAsString() << "\n";
	break;
	}
	case Decl::FileScopeAsm: {
	Out << "<file-scope asm>\n";
	break;
	}
	case Decl::UsingDirective: {
	Out << "<using directive>\n";
	break;
	}
	case Decl::NamespaceAlias: {
	NamespaceAliasDecl* NAD = cast<NamespaceAliasDecl>(*I);
	Out << "<namespace alias> " << NAD->getNameAsString() << "\n";
	break;
	}
	case Decl::ClassTemplate: {
	ClassTemplateDecl CTD = cast<ClassTemplateDecl>(I);
	Out << "<class template> " << CTD->getNameAsString() << '\n';
	break;
	}
	default:
	Out << "DeclKind: " << DK << '"' << I->getDeclKindName() << "\"\n";
	assert(0 && "decl unhandled");
	}
	}
	}
	ASTConsumer *clang::CreateDeclContextPrinter() {
	return new DeclContextPrinter();
	}

	//===----------------------------------------------------------------------===//
	/// RecordLayoutDumper - C++ Record Layout Dumping.
	namespace {
	class RecordLayoutDumper : public ASTConsumer {
	llvm::raw_ostream& Out;

	void PrintOffset(uint64_t Offset, unsigned IndentLevel) {
	Out << llvm::format("%4d \| ", Offset);
	for (unsigned I = 0; I < IndentLevel * 2; ++I) Out << ' ';
	}

	void DumpRecordLayoutOffsets(const CXXRecordDecl *RD, ASTContext &C,
	uint64_t Offset,
	unsigned IndentLevel, const char* Description,
	bool IncludeVirtualBases) {
	const ASTRecordLayout &Info = C.getASTRecordLayout(RD);

	PrintOffset(Offset, IndentLevel);
	Out << C.getTypeDeclType((CXXRecordDecl *)RD).getAsString();
	if (Description)
	Out << ' ' << Description;
	if (RD->isEmpty())
	Out << " (empty)";
	Out << '\n';

	IndentLevel++;

	const CXXRecordDecl *PrimaryBase = Info.getPrimaryBase();

	// Vtable pointer.
	if (RD->isDynamicClass() && !PrimaryBase) {
	PrintOffset(Offset, IndentLevel);
	Out << '(' << RD->getNameAsString() << " vtable pointer)\n";
	}
	// Dump (non-virtual) bases
	for (CXXRecordDecl::base_class_const_iterator I = RD->bases_begin(),
	E = RD->bases_end(); I != E; ++I) {
	assert(!I->getType()->isDependentType() &&
	"Cannot layout class with dependent bases.");
	if (I->isVirtual())
	continue;

	const CXXRecordDecl *Base =
	cast<CXXRecordDecl>(I->getType()->getAs<RecordType>()->getDecl());

	uint64_t BaseOffset = Offset + Info.getBaseClassOffset(Base) / 8;

	DumpRecordLayoutOffsets(Base, C, BaseOffset, IndentLevel,
	Base == PrimaryBase ? "(primary base)" : "(base)",
	/IncludeVirtualBases=/false);
	}

	// Dump fields.
	uint64_t FieldNo = 0;
	for (CXXRecordDecl::field_iterator I = RD->field_begin(),
	E = RD->field_end(); I != E; ++I, ++FieldNo) {
	const FieldDecl Field = I;
	uint64_t FieldOffset = Offset + Info.getFieldOffset(FieldNo) / 8;

	if (const RecordType *RT = Field->getType()->getAs<RecordType>()) {
	if (const CXXRecordDecl *D = dyn_cast<CXXRecordDecl>(RT->getDecl())) {
	DumpRecordLayoutOffsets(D, C, FieldOffset, IndentLevel,
	Field->getNameAsCString(),
	/IncludeVirtualBases=/true);
	continue;
	}
	}

	PrintOffset(FieldOffset, IndentLevel);
	Out << Field->getType().getAsString() << ' ';
	Out << Field->getNameAsString() << '\n';
	}

	if (!IncludeVirtualBases)
	return;

	// Dump virtual bases.
	for (CXXRecordDecl::base_class_const_iterator I = RD->vbases_begin(),
	E = RD->vbases_end(); I != E; ++I) {
	assert(I->isVirtual() && "Found non-virtual class!");
	const CXXRecordDecl *VBase =
	cast<CXXRecordDecl>(I->getType()->getAs<RecordType>()->getDecl());

	uint64_t VBaseOffset = Offset + Info.getVBaseClassOffset(VBase) / 8;
	DumpRecordLayoutOffsets(VBase, C, VBaseOffset, IndentLevel,
	VBase == PrimaryBase ?
	"(primary virtual base)" : "(virtual base)",
	/IncludeVirtualBases=/false);
	}
	}

	// FIXME: Maybe this could be useful in ASTContext.cpp.
	void DumpRecordLayout(const CXXRecordDecl *RD, ASTContext &C) {
	const ASTRecordLayout &Info = C.getASTRecordLayout(RD);

	DumpRecordLayoutOffsets(RD, C, 0, 0, 0,
	/IncludeVirtualBases=/true);
	Out << " sizeof=" << Info.getSize() / 8;
	Out << ", dsize=" << Info.getDataSize() / 8;
	Out << ", align=" << Info.getAlignment() / 8 << '\n';
	Out << " nvsize=" << Info.getNonVirtualSize() / 8;
	Out << ", nvalign=" << Info.getNonVirtualAlign() / 8 << '\n';
	Out << '\n';
	}

	public:
	RecordLayoutDumper() : Out(llvm::errs()) {}

	void HandleTranslationUnit(ASTContext &C) {
	for (ASTContext::type_iterator I = C.types_begin(), E = C.types_end();
	I != E; ++I) {
	const RecordType RT = dyn_cast<RecordType>(I);
	if (!RT)
	continue;

	const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(RT->getDecl());
	if (!RD)
	continue;

	if (RD->isImplicit())
	continue;

	if (RD->isDependentType())
	continue;

	if (RD->isInvalidDecl())
	continue;

	if (!RD->getDefinition())
	continue;

	// FIXME: Do we really need to hard code this?
	if (RD->getQualifiedNameAsString() == "__va_list_tag")
	continue;

	DumpRecordLayout(RD, C);
	}
	}
	};
	} // end anonymous namespace
	ASTConsumer *clang::CreateRecordLayoutDumper() {
	return new RecordLayoutDumper();
	}

	//===----------------------------------------------------------------------===//
	/// InheritanceViewer - C++ Inheritance Visualization

	namespace {
	class InheritanceViewer : public ASTConsumer {
	const std::string clsname;
	public:
	InheritanceViewer(const std::string& cname) : clsname(cname) {}

	void HandleTranslationUnit(ASTContext &C) {
	for (ASTContext::type_iterator I=C.types_begin(),E=C.types_end(); I!=E; ++I)
	if (RecordType T = dyn_cast<RecordType>(I)) {
	if (CXXRecordDecl *D = dyn_cast<CXXRecordDecl>(T->getDecl())) {
	// FIXME: This lookup needs to be generalized to handle namespaces and
	// (when we support them) templates.
	if (D->getNameAsString() == clsname) {
	D->viewInheritance(C);
	}
	}
	}
	}
	};
	}

	ASTConsumer *clang::CreateInheritanceViewer(const std::string& clsname) {
	return new InheritanceViewer(clsname);
	}