1//===--- DeclPrinter.cpp - Printing implementation for Decl ASTs ----------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file implements the Decl::print method, which pretty prints the
11// AST back out to C/Objective-C/C++/Objective-C++ code.
12//
13//===----------------------------------------------------------------------===//
14#include "clang/AST/ASTContext.h"
15#include "clang/AST/Attr.h"
16#include "clang/AST/Decl.h"
17#include "clang/AST/DeclCXX.h"
18#include "clang/AST/DeclObjC.h"
19#include "clang/AST/DeclVisitor.h"
20#include "clang/AST/Expr.h"
21#include "clang/AST/ExprCXX.h"
22#include "clang/AST/PrettyPrinter.h"
23#include "clang/Basic/Module.h"
24#include "llvm/Support/raw_ostream.h"
25using namespace clang;
26
27namespace {
28  class DeclPrinter : public DeclVisitor<DeclPrinter> {
29    raw_ostream &Out;
30    PrintingPolicy Policy;
31    unsigned Indentation;
32    bool PrintInstantiation;
33
34    raw_ostream& Indent() { return Indent(Indentation); }
35    raw_ostream& Indent(unsigned Indentation);
36    void ProcessDeclGroup(SmallVectorImpl<Decl*>& Decls);
37
38    void Print(AccessSpecifier AS);
39
40    /// Print an Objective-C method type in parentheses.
41    ///
42    /// \param Quals The Objective-C declaration qualifiers.
43    /// \param T The type to print.
44    void PrintObjCMethodType(ASTContext &Ctx, Decl::ObjCDeclQualifier Quals,
45                             QualType T);
46
47    void PrintObjCTypeParams(ObjCTypeParamList *Params);
48
49  public:
50    DeclPrinter(raw_ostream &Out, const PrintingPolicy &Policy,
51                unsigned Indentation = 0, bool PrintInstantiation = false)
52      : Out(Out), Policy(Policy), Indentation(Indentation),
53        PrintInstantiation(PrintInstantiation) { }
54
55    void VisitDeclContext(DeclContext *DC, bool Indent = true);
56
57    void VisitTranslationUnitDecl(TranslationUnitDecl *D);
58    void VisitTypedefDecl(TypedefDecl *D);
59    void VisitTypeAliasDecl(TypeAliasDecl *D);
60    void VisitEnumDecl(EnumDecl *D);
61    void VisitRecordDecl(RecordDecl *D);
62    void VisitEnumConstantDecl(EnumConstantDecl *D);
63    void VisitEmptyDecl(EmptyDecl *D);
64    void VisitFunctionDecl(FunctionDecl *D);
65    void VisitFriendDecl(FriendDecl *D);
66    void VisitFieldDecl(FieldDecl *D);
67    void VisitVarDecl(VarDecl *D);
68    void VisitLabelDecl(LabelDecl *D);
69    void VisitParmVarDecl(ParmVarDecl *D);
70    void VisitFileScopeAsmDecl(FileScopeAsmDecl *D);
71    void VisitImportDecl(ImportDecl *D);
72    void VisitStaticAssertDecl(StaticAssertDecl *D);
73    void VisitNamespaceDecl(NamespaceDecl *D);
74    void VisitUsingDirectiveDecl(UsingDirectiveDecl *D);
75    void VisitNamespaceAliasDecl(NamespaceAliasDecl *D);
76    void VisitCXXRecordDecl(CXXRecordDecl *D);
77    void VisitLinkageSpecDecl(LinkageSpecDecl *D);
78    void VisitTemplateDecl(const TemplateDecl *D);
79    void VisitFunctionTemplateDecl(FunctionTemplateDecl *D);
80    void VisitClassTemplateDecl(ClassTemplateDecl *D);
81    void VisitObjCMethodDecl(ObjCMethodDecl *D);
82    void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
83    void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
84    void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
85    void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
86    void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
87    void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
88    void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
89    void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
90    void VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D);
91    void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D);
92    void VisitUsingDecl(UsingDecl *D);
93    void VisitUsingShadowDecl(UsingShadowDecl *D);
94    void VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D);
95
96    void PrintTemplateParameters(const TemplateParameterList *Params,
97                                 const TemplateArgumentList *Args = nullptr);
98    void prettyPrintAttributes(Decl *D);
99    void prettyPrintPragmas(Decl *D);
100    void printDeclType(QualType T, StringRef DeclName, bool Pack = false);
101  };
102}
103
104void Decl::print(raw_ostream &Out, unsigned Indentation,
105                 bool PrintInstantiation) const {
106  print(Out, getASTContext().getPrintingPolicy(), Indentation, PrintInstantiation);
107}
108
109void Decl::print(raw_ostream &Out, const PrintingPolicy &Policy,
110                 unsigned Indentation, bool PrintInstantiation) const {
111  DeclPrinter Printer(Out, Policy, Indentation, PrintInstantiation);
112  Printer.Visit(const_cast<Decl*>(this));
113}
114
115static QualType GetBaseType(QualType T) {
116  // FIXME: This should be on the Type class!
117  QualType BaseType = T;
118  while (!BaseType->isSpecifierType()) {
119    if (isa<TypedefType>(BaseType))
120      break;
121    else if (const PointerType* PTy = BaseType->getAs<PointerType>())
122      BaseType = PTy->getPointeeType();
123    else if (const BlockPointerType *BPy = BaseType->getAs<BlockPointerType>())
124      BaseType = BPy->getPointeeType();
125    else if (const ArrayType* ATy = dyn_cast<ArrayType>(BaseType))
126      BaseType = ATy->getElementType();
127    else if (const FunctionType* FTy = BaseType->getAs<FunctionType>())
128      BaseType = FTy->getReturnType();
129    else if (const VectorType *VTy = BaseType->getAs<VectorType>())
130      BaseType = VTy->getElementType();
131    else if (const ReferenceType *RTy = BaseType->getAs<ReferenceType>())
132      BaseType = RTy->getPointeeType();
133    else
134      llvm_unreachable("Unknown declarator!");
135  }
136  return BaseType;
137}
138
139static QualType getDeclType(Decl* D) {
140  if (TypedefNameDecl* TDD = dyn_cast<TypedefNameDecl>(D))
141    return TDD->getUnderlyingType();
142  if (ValueDecl* VD = dyn_cast<ValueDecl>(D))
143    return VD->getType();
144  return QualType();
145}
146
147void Decl::printGroup(Decl** Begin, unsigned NumDecls,
148                      raw_ostream &Out, const PrintingPolicy &Policy,
149                      unsigned Indentation) {
150  if (NumDecls == 1) {
151    (*Begin)->print(Out, Policy, Indentation);
152    return;
153  }
154
155  Decl** End = Begin + NumDecls;
156  TagDecl* TD = dyn_cast<TagDecl>(*Begin);
157  if (TD)
158    ++Begin;
159
160  PrintingPolicy SubPolicy(Policy);
161  if (TD && TD->isCompleteDefinition()) {
162    TD->print(Out, Policy, Indentation);
163    Out << " ";
164    SubPolicy.SuppressTag = true;
165  }
166
167  bool isFirst = true;
168  for ( ; Begin != End; ++Begin) {
169    if (isFirst) {
170      SubPolicy.SuppressSpecifiers = false;
171      isFirst = false;
172    } else {
173      if (!isFirst) Out << ", ";
174      SubPolicy.SuppressSpecifiers = true;
175    }
176
177    (*Begin)->print(Out, SubPolicy, Indentation);
178  }
179}
180
181LLVM_DUMP_METHOD void DeclContext::dumpDeclContext() const {
182  // Get the translation unit
183  const DeclContext *DC = this;
184  while (!DC->isTranslationUnit())
185    DC = DC->getParent();
186
187  ASTContext &Ctx = cast<TranslationUnitDecl>(DC)->getASTContext();
188  DeclPrinter Printer(llvm::errs(), Ctx.getPrintingPolicy(), 0);
189  Printer.VisitDeclContext(const_cast<DeclContext *>(this), /*Indent=*/false);
190}
191
192raw_ostream& DeclPrinter::Indent(unsigned Indentation) {
193  for (unsigned i = 0; i != Indentation; ++i)
194    Out << "  ";
195  return Out;
196}
197
198void DeclPrinter::prettyPrintAttributes(Decl *D) {
199  if (Policy.PolishForDeclaration)
200    return;
201
202  if (D->hasAttrs()) {
203    AttrVec &Attrs = D->getAttrs();
204    for (auto *A : Attrs) {
205      switch (A->getKind()) {
206#define ATTR(X)
207#define PRAGMA_SPELLING_ATTR(X) case attr::X:
208#include "clang/Basic/AttrList.inc"
209        break;
210      default:
211        A->printPretty(Out, Policy);
212        break;
213      }
214    }
215  }
216}
217
218void DeclPrinter::prettyPrintPragmas(Decl *D) {
219  if (Policy.PolishForDeclaration)
220    return;
221
222  if (D->hasAttrs()) {
223    AttrVec &Attrs = D->getAttrs();
224    for (auto *A : Attrs) {
225      switch (A->getKind()) {
226#define ATTR(X)
227#define PRAGMA_SPELLING_ATTR(X) case attr::X:
228#include "clang/Basic/AttrList.inc"
229        A->printPretty(Out, Policy);
230        Indent();
231        break;
232      default:
233        break;
234      }
235    }
236  }
237}
238
239void DeclPrinter::printDeclType(QualType T, StringRef DeclName, bool Pack) {
240  // Normally, a PackExpansionType is written as T[3]... (for instance, as a
241  // template argument), but if it is the type of a declaration, the ellipsis
242  // is placed before the name being declared.
243  if (auto *PET = T->getAs<PackExpansionType>()) {
244    Pack = true;
245    T = PET->getPattern();
246  }
247  T.print(Out, Policy, (Pack ? "..." : "") + DeclName);
248}
249
250void DeclPrinter::ProcessDeclGroup(SmallVectorImpl<Decl*>& Decls) {
251  this->Indent();
252  Decl::printGroup(Decls.data(), Decls.size(), Out, Policy, Indentation);
253  Out << ";\n";
254  Decls.clear();
255
256}
257
258void DeclPrinter::Print(AccessSpecifier AS) {
259  switch(AS) {
260  case AS_none:      llvm_unreachable("No access specifier!");
261  case AS_public:    Out << "public"; break;
262  case AS_protected: Out << "protected"; break;
263  case AS_private:   Out << "private"; break;
264  }
265}
266
267//----------------------------------------------------------------------------
268// Common C declarations
269//----------------------------------------------------------------------------
270
271void DeclPrinter::VisitDeclContext(DeclContext *DC, bool Indent) {
272  if (Policy.TerseOutput)
273    return;
274
275  if (Indent)
276    Indentation += Policy.Indentation;
277
278  SmallVector<Decl*, 2> Decls;
279  for (DeclContext::decl_iterator D = DC->decls_begin(), DEnd = DC->decls_end();
280       D != DEnd; ++D) {
281
282    // Don't print ObjCIvarDecls, as they are printed when visiting the
283    // containing ObjCInterfaceDecl.
284    if (isa<ObjCIvarDecl>(*D))
285      continue;
286
287    // Skip over implicit declarations in pretty-printing mode.
288    if (D->isImplicit())
289      continue;
290
291    // The next bits of code handles stuff like "struct {int x;} a,b"; we're
292    // forced to merge the declarations because there's no other way to
293    // refer to the struct in question.  This limited merging is safe without
294    // a bunch of other checks because it only merges declarations directly
295    // referring to the tag, not typedefs.
296    //
297    // Check whether the current declaration should be grouped with a previous
298    // unnamed struct.
299    QualType CurDeclType = getDeclType(*D);
300    if (!Decls.empty() && !CurDeclType.isNull()) {
301      QualType BaseType = GetBaseType(CurDeclType);
302      if (!BaseType.isNull() && isa<ElaboratedType>(BaseType))
303        BaseType = cast<ElaboratedType>(BaseType)->getNamedType();
304      if (!BaseType.isNull() && isa<TagType>(BaseType) &&
305          cast<TagType>(BaseType)->getDecl() == Decls[0]) {
306        Decls.push_back(*D);
307        continue;
308      }
309    }
310
311    // If we have a merged group waiting to be handled, handle it now.
312    if (!Decls.empty())
313      ProcessDeclGroup(Decls);
314
315    // If the current declaration is an unnamed tag type, save it
316    // so we can merge it with the subsequent declaration(s) using it.
317    if (isa<TagDecl>(*D) && !cast<TagDecl>(*D)->getIdentifier()) {
318      Decls.push_back(*D);
319      continue;
320    }
321
322    if (isa<AccessSpecDecl>(*D)) {
323      Indentation -= Policy.Indentation;
324      this->Indent();
325      Print(D->getAccess());
326      Out << ":\n";
327      Indentation += Policy.Indentation;
328      continue;
329    }
330
331    this->Indent();
332    Visit(*D);
333
334    // FIXME: Need to be able to tell the DeclPrinter when
335    const char *Terminator = nullptr;
336    if (isa<OMPThreadPrivateDecl>(*D))
337      Terminator = nullptr;
338    else if (isa<FunctionDecl>(*D) &&
339             cast<FunctionDecl>(*D)->isThisDeclarationADefinition())
340      Terminator = nullptr;
341    else if (isa<ObjCMethodDecl>(*D) && cast<ObjCMethodDecl>(*D)->getBody())
342      Terminator = nullptr;
343    else if (isa<NamespaceDecl>(*D) || isa<LinkageSpecDecl>(*D) ||
344             isa<ObjCImplementationDecl>(*D) ||
345             isa<ObjCInterfaceDecl>(*D) ||
346             isa<ObjCProtocolDecl>(*D) ||
347             isa<ObjCCategoryImplDecl>(*D) ||
348             isa<ObjCCategoryDecl>(*D))
349      Terminator = nullptr;
350    else if (isa<EnumConstantDecl>(*D)) {
351      DeclContext::decl_iterator Next = D;
352      ++Next;
353      if (Next != DEnd)
354        Terminator = ",";
355    } else
356      Terminator = ";";
357
358    if (Terminator)
359      Out << Terminator;
360    Out << "\n";
361  }
362
363  if (!Decls.empty())
364    ProcessDeclGroup(Decls);
365
366  if (Indent)
367    Indentation -= Policy.Indentation;
368}
369
370void DeclPrinter::VisitTranslationUnitDecl(TranslationUnitDecl *D) {
371  VisitDeclContext(D, false);
372}
373
374void DeclPrinter::VisitTypedefDecl(TypedefDecl *D) {
375  if (!Policy.SuppressSpecifiers) {
376    Out << "typedef ";
377
378    if (D->isModulePrivate())
379      Out << "__module_private__ ";
380  }
381  D->getTypeSourceInfo()->getType().print(Out, Policy, D->getName());
382  prettyPrintAttributes(D);
383}
384
385void DeclPrinter::VisitTypeAliasDecl(TypeAliasDecl *D) {
386  Out << "using " << *D;
387  prettyPrintAttributes(D);
388  Out << " = " << D->getTypeSourceInfo()->getType().getAsString(Policy);
389}
390
391void DeclPrinter::VisitEnumDecl(EnumDecl *D) {
392  if (!Policy.SuppressSpecifiers && D->isModulePrivate())
393    Out << "__module_private__ ";
394  Out << "enum ";
395  if (D->isScoped()) {
396    if (D->isScopedUsingClassTag())
397      Out << "class ";
398    else
399      Out << "struct ";
400  }
401  Out << *D;
402
403  if (D->isFixed())
404    Out << " : " << D->getIntegerType().stream(Policy);
405
406  if (D->isCompleteDefinition()) {
407    Out << " {\n";
408    VisitDeclContext(D);
409    Indent() << "}";
410  }
411  prettyPrintAttributes(D);
412}
413
414void DeclPrinter::VisitRecordDecl(RecordDecl *D) {
415  if (!Policy.SuppressSpecifiers && D->isModulePrivate())
416    Out << "__module_private__ ";
417  Out << D->getKindName();
418
419  prettyPrintAttributes(D);
420
421  if (D->getIdentifier())
422    Out << ' ' << *D;
423
424  if (D->isCompleteDefinition()) {
425    Out << " {\n";
426    VisitDeclContext(D);
427    Indent() << "}";
428  }
429}
430
431void DeclPrinter::VisitEnumConstantDecl(EnumConstantDecl *D) {
432  Out << *D;
433  if (Expr *Init = D->getInitExpr()) {
434    Out << " = ";
435    Init->printPretty(Out, nullptr, Policy, Indentation);
436  }
437}
438
439void DeclPrinter::VisitFunctionDecl(FunctionDecl *D) {
440  if (!D->getDescribedFunctionTemplate() &&
441      !D->isFunctionTemplateSpecialization())
442    prettyPrintPragmas(D);
443
444  CXXConstructorDecl *CDecl = dyn_cast<CXXConstructorDecl>(D);
445  CXXConversionDecl *ConversionDecl = dyn_cast<CXXConversionDecl>(D);
446  if (!Policy.SuppressSpecifiers) {
447    switch (D->getStorageClass()) {
448    case SC_None: break;
449    case SC_Extern: Out << "extern "; break;
450    case SC_Static: Out << "static "; break;
451    case SC_PrivateExtern: Out << "__private_extern__ "; break;
452    case SC_Auto: case SC_Register:
453      llvm_unreachable("invalid for functions");
454    }
455
456    if (D->isInlineSpecified())  Out << "inline ";
457    if (D->isVirtualAsWritten()) Out << "virtual ";
458    if (D->isModulePrivate())    Out << "__module_private__ ";
459    if (D->isConstexpr() && !D->isExplicitlyDefaulted()) Out << "constexpr ";
460    if ((CDecl && CDecl->isExplicitSpecified()) ||
461        (ConversionDecl && ConversionDecl->isExplicit()))
462      Out << "explicit ";
463  }
464
465  PrintingPolicy SubPolicy(Policy);
466  SubPolicy.SuppressSpecifiers = false;
467  std::string Proto = D->getNameInfo().getAsString();
468
469  QualType Ty = D->getType();
470  while (const ParenType *PT = dyn_cast<ParenType>(Ty)) {
471    Proto = '(' + Proto + ')';
472    Ty = PT->getInnerType();
473  }
474
475  if (const FunctionType *AFT = Ty->getAs<FunctionType>()) {
476    const FunctionProtoType *FT = nullptr;
477    if (D->hasWrittenPrototype())
478      FT = dyn_cast<FunctionProtoType>(AFT);
479
480    Proto += "(";
481    if (FT) {
482      llvm::raw_string_ostream POut(Proto);
483      DeclPrinter ParamPrinter(POut, SubPolicy, Indentation);
484      for (unsigned i = 0, e = D->getNumParams(); i != e; ++i) {
485        if (i) POut << ", ";
486        ParamPrinter.VisitParmVarDecl(D->getParamDecl(i));
487      }
488
489      if (FT->isVariadic()) {
490        if (D->getNumParams()) POut << ", ";
491        POut << "...";
492      }
493    } else if (D->doesThisDeclarationHaveABody() && !D->hasPrototype()) {
494      for (unsigned i = 0, e = D->getNumParams(); i != e; ++i) {
495        if (i)
496          Proto += ", ";
497        Proto += D->getParamDecl(i)->getNameAsString();
498      }
499    }
500
501    Proto += ")";
502
503    if (FT) {
504      if (FT->isConst())
505        Proto += " const";
506      if (FT->isVolatile())
507        Proto += " volatile";
508      if (FT->isRestrict())
509        Proto += " restrict";
510
511      switch (FT->getRefQualifier()) {
512      case RQ_None:
513        break;
514      case RQ_LValue:
515        Proto += " &";
516        break;
517      case RQ_RValue:
518        Proto += " &&";
519        break;
520      }
521    }
522
523    if (FT && FT->hasDynamicExceptionSpec()) {
524      Proto += " throw(";
525      if (FT->getExceptionSpecType() == EST_MSAny)
526        Proto += "...";
527      else
528        for (unsigned I = 0, N = FT->getNumExceptions(); I != N; ++I) {
529          if (I)
530            Proto += ", ";
531
532          Proto += FT->getExceptionType(I).getAsString(SubPolicy);
533        }
534      Proto += ")";
535    } else if (FT && isNoexceptExceptionSpec(FT->getExceptionSpecType())) {
536      Proto += " noexcept";
537      if (FT->getExceptionSpecType() == EST_ComputedNoexcept) {
538        Proto += "(";
539        llvm::raw_string_ostream EOut(Proto);
540        FT->getNoexceptExpr()->printPretty(EOut, nullptr, SubPolicy,
541                                           Indentation);
542        EOut.flush();
543        Proto += EOut.str();
544        Proto += ")";
545      }
546    }
547
548    if (CDecl) {
549      bool HasInitializerList = false;
550      for (const auto *BMInitializer : CDecl->inits()) {
551        if (BMInitializer->isInClassMemberInitializer())
552          continue;
553
554        if (!HasInitializerList) {
555          Proto += " : ";
556          Out << Proto;
557          Proto.clear();
558          HasInitializerList = true;
559        } else
560          Out << ", ";
561
562        if (BMInitializer->isAnyMemberInitializer()) {
563          FieldDecl *FD = BMInitializer->getAnyMember();
564          Out << *FD;
565        } else {
566          Out << QualType(BMInitializer->getBaseClass(), 0).getAsString(Policy);
567        }
568
569        Out << "(";
570        if (!BMInitializer->getInit()) {
571          // Nothing to print
572        } else {
573          Expr *Init = BMInitializer->getInit();
574          if (ExprWithCleanups *Tmp = dyn_cast<ExprWithCleanups>(Init))
575            Init = Tmp->getSubExpr();
576
577          Init = Init->IgnoreParens();
578
579          Expr *SimpleInit = nullptr;
580          Expr **Args = nullptr;
581          unsigned NumArgs = 0;
582          if (ParenListExpr *ParenList = dyn_cast<ParenListExpr>(Init)) {
583            Args = ParenList->getExprs();
584            NumArgs = ParenList->getNumExprs();
585          } else if (CXXConstructExpr *Construct
586                                        = dyn_cast<CXXConstructExpr>(Init)) {
587            Args = Construct->getArgs();
588            NumArgs = Construct->getNumArgs();
589          } else
590            SimpleInit = Init;
591
592          if (SimpleInit)
593            SimpleInit->printPretty(Out, nullptr, Policy, Indentation);
594          else {
595            for (unsigned I = 0; I != NumArgs; ++I) {
596              assert(Args[I] != nullptr && "Expected non-null Expr");
597              if (isa<CXXDefaultArgExpr>(Args[I]))
598                break;
599
600              if (I)
601                Out << ", ";
602              Args[I]->printPretty(Out, nullptr, Policy, Indentation);
603            }
604          }
605        }
606        Out << ")";
607        if (BMInitializer->isPackExpansion())
608          Out << "...";
609      }
610    } else if (!ConversionDecl && !isa<CXXDestructorDecl>(D)) {
611      if (FT && FT->hasTrailingReturn()) {
612        Out << "auto " << Proto << " -> ";
613        Proto.clear();
614      }
615      AFT->getReturnType().print(Out, Policy, Proto);
616      Proto.clear();
617    }
618    Out << Proto;
619  } else {
620    Ty.print(Out, Policy, Proto);
621  }
622
623  prettyPrintAttributes(D);
624
625  if (D->isPure())
626    Out << " = 0";
627  else if (D->isDeletedAsWritten())
628    Out << " = delete";
629  else if (D->isExplicitlyDefaulted())
630    Out << " = default";
631  else if (D->doesThisDeclarationHaveABody() && !Policy.TerseOutput) {
632    if (!D->hasPrototype() && D->getNumParams()) {
633      // This is a K&R function definition, so we need to print the
634      // parameters.
635      Out << '\n';
636      DeclPrinter ParamPrinter(Out, SubPolicy, Indentation);
637      Indentation += Policy.Indentation;
638      for (unsigned i = 0, e = D->getNumParams(); i != e; ++i) {
639        Indent();
640        ParamPrinter.VisitParmVarDecl(D->getParamDecl(i));
641        Out << ";\n";
642      }
643      Indentation -= Policy.Indentation;
644    } else
645      Out << ' ';
646
647    if (D->getBody())
648      D->getBody()->printPretty(Out, nullptr, SubPolicy, Indentation);
649    Out << '\n';
650  }
651}
652
653void DeclPrinter::VisitFriendDecl(FriendDecl *D) {
654  if (TypeSourceInfo *TSI = D->getFriendType()) {
655    unsigned NumTPLists = D->getFriendTypeNumTemplateParameterLists();
656    for (unsigned i = 0; i < NumTPLists; ++i)
657      PrintTemplateParameters(D->getFriendTypeTemplateParameterList(i));
658    Out << "friend ";
659    Out << " " << TSI->getType().getAsString(Policy);
660  }
661  else if (FunctionDecl *FD =
662      dyn_cast<FunctionDecl>(D->getFriendDecl())) {
663    Out << "friend ";
664    VisitFunctionDecl(FD);
665  }
666  else if (FunctionTemplateDecl *FTD =
667           dyn_cast<FunctionTemplateDecl>(D->getFriendDecl())) {
668    Out << "friend ";
669    VisitFunctionTemplateDecl(FTD);
670  }
671  else if (ClassTemplateDecl *CTD =
672           dyn_cast<ClassTemplateDecl>(D->getFriendDecl())) {
673    Out << "friend ";
674    VisitRedeclarableTemplateDecl(CTD);
675  }
676}
677
678void DeclPrinter::VisitFieldDecl(FieldDecl *D) {
679  // FIXME: add printing of pragma attributes if required.
680  if (!Policy.SuppressSpecifiers && D->isMutable())
681    Out << "mutable ";
682  if (!Policy.SuppressSpecifiers && D->isModulePrivate())
683    Out << "__module_private__ ";
684
685  Out << D->getASTContext().getUnqualifiedObjCPointerType(D->getType()).
686            stream(Policy, D->getName());
687
688  if (D->isBitField()) {
689    Out << " : ";
690    D->getBitWidth()->printPretty(Out, nullptr, Policy, Indentation);
691  }
692
693  Expr *Init = D->getInClassInitializer();
694  if (!Policy.SuppressInitializers && Init) {
695    if (D->getInClassInitStyle() == ICIS_ListInit)
696      Out << " ";
697    else
698      Out << " = ";
699    Init->printPretty(Out, nullptr, Policy, Indentation);
700  }
701  prettyPrintAttributes(D);
702}
703
704void DeclPrinter::VisitLabelDecl(LabelDecl *D) {
705  Out << *D << ":";
706}
707
708void DeclPrinter::VisitVarDecl(VarDecl *D) {
709  prettyPrintPragmas(D);
710  if (!Policy.SuppressSpecifiers) {
711    StorageClass SC = D->getStorageClass();
712    if (SC != SC_None)
713      Out << VarDecl::getStorageClassSpecifierString(SC) << " ";
714
715    switch (D->getTSCSpec()) {
716    case TSCS_unspecified:
717      break;
718    case TSCS___thread:
719      Out << "__thread ";
720      break;
721    case TSCS__Thread_local:
722      Out << "_Thread_local ";
723      break;
724    case TSCS_thread_local:
725      Out << "thread_local ";
726      break;
727    }
728
729    if (D->isModulePrivate())
730      Out << "__module_private__ ";
731  }
732
733  QualType T = D->getTypeSourceInfo()
734    ? D->getTypeSourceInfo()->getType()
735    : D->getASTContext().getUnqualifiedObjCPointerType(D->getType());
736  printDeclType(T, D->getName());
737  Expr *Init = D->getInit();
738  if (!Policy.SuppressInitializers && Init) {
739    bool ImplicitInit = false;
740    if (CXXConstructExpr *Construct =
741            dyn_cast<CXXConstructExpr>(Init->IgnoreImplicit())) {
742      if (D->getInitStyle() == VarDecl::CallInit &&
743          !Construct->isListInitialization()) {
744        ImplicitInit = Construct->getNumArgs() == 0 ||
745          Construct->getArg(0)->isDefaultArgument();
746      }
747    }
748    if (!ImplicitInit) {
749      if ((D->getInitStyle() == VarDecl::CallInit) && !isa<ParenListExpr>(Init))
750        Out << "(";
751      else if (D->getInitStyle() == VarDecl::CInit) {
752        Out << " = ";
753      }
754      Init->printPretty(Out, nullptr, Policy, Indentation);
755      if ((D->getInitStyle() == VarDecl::CallInit) && !isa<ParenListExpr>(Init))
756        Out << ")";
757    }
758  }
759  prettyPrintAttributes(D);
760}
761
762void DeclPrinter::VisitParmVarDecl(ParmVarDecl *D) {
763  VisitVarDecl(D);
764}
765
766void DeclPrinter::VisitFileScopeAsmDecl(FileScopeAsmDecl *D) {
767  Out << "__asm (";
768  D->getAsmString()->printPretty(Out, nullptr, Policy, Indentation);
769  Out << ")";
770}
771
772void DeclPrinter::VisitImportDecl(ImportDecl *D) {
773  Out << "@import " << D->getImportedModule()->getFullModuleName()
774      << ";\n";
775}
776
777void DeclPrinter::VisitStaticAssertDecl(StaticAssertDecl *D) {
778  Out << "static_assert(";
779  D->getAssertExpr()->printPretty(Out, nullptr, Policy, Indentation);
780  if (StringLiteral *SL = D->getMessage()) {
781    Out << ", ";
782    SL->printPretty(Out, nullptr, Policy, Indentation);
783  }
784  Out << ")";
785}
786
787//----------------------------------------------------------------------------
788// C++ declarations
789//----------------------------------------------------------------------------
790void DeclPrinter::VisitNamespaceDecl(NamespaceDecl *D) {
791  if (D->isInline())
792    Out << "inline ";
793  Out << "namespace " << *D << " {\n";
794  VisitDeclContext(D);
795  Indent() << "}";
796}
797
798void DeclPrinter::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
799  Out << "using namespace ";
800  if (D->getQualifier())
801    D->getQualifier()->print(Out, Policy);
802  Out << *D->getNominatedNamespaceAsWritten();
803}
804
805void DeclPrinter::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
806  Out << "namespace " << *D << " = ";
807  if (D->getQualifier())
808    D->getQualifier()->print(Out, Policy);
809  Out << *D->getAliasedNamespace();
810}
811
812void DeclPrinter::VisitEmptyDecl(EmptyDecl *D) {
813  prettyPrintAttributes(D);
814}
815
816void DeclPrinter::VisitCXXRecordDecl(CXXRecordDecl *D) {
817  // FIXME: add printing of pragma attributes if required.
818  if (!Policy.SuppressSpecifiers && D->isModulePrivate())
819    Out << "__module_private__ ";
820  Out << D->getKindName();
821
822  prettyPrintAttributes(D);
823
824  if (D->getIdentifier())
825    Out << ' ' << *D;
826
827  if (D->isCompleteDefinition()) {
828    // Print the base classes
829    if (D->getNumBases()) {
830      Out << " : ";
831      for (CXXRecordDecl::base_class_iterator Base = D->bases_begin(),
832             BaseEnd = D->bases_end(); Base != BaseEnd; ++Base) {
833        if (Base != D->bases_begin())
834          Out << ", ";
835
836        if (Base->isVirtual())
837          Out << "virtual ";
838
839        AccessSpecifier AS = Base->getAccessSpecifierAsWritten();
840        if (AS != AS_none) {
841          Print(AS);
842          Out << " ";
843        }
844        Out << Base->getType().getAsString(Policy);
845
846        if (Base->isPackExpansion())
847          Out << "...";
848      }
849    }
850
851    // Print the class definition
852    // FIXME: Doesn't print access specifiers, e.g., "public:"
853    Out << " {\n";
854    VisitDeclContext(D);
855    Indent() << "}";
856  }
857}
858
859void DeclPrinter::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
860  const char *l;
861  if (D->getLanguage() == LinkageSpecDecl::lang_c)
862    l = "C";
863  else {
864    assert(D->getLanguage() == LinkageSpecDecl::lang_cxx &&
865           "unknown language in linkage specification");
866    l = "C++";
867  }
868
869  Out << "extern \"" << l << "\" ";
870  if (D->hasBraces()) {
871    Out << "{\n";
872    VisitDeclContext(D);
873    Indent() << "}";
874  } else
875    Visit(*D->decls_begin());
876}
877
878void DeclPrinter::PrintTemplateParameters(const TemplateParameterList *Params,
879                                          const TemplateArgumentList *Args) {
880  assert(Params);
881  assert(!Args || Params->size() == Args->size());
882
883  Out << "template <";
884
885  for (unsigned i = 0, e = Params->size(); i != e; ++i) {
886    if (i != 0)
887      Out << ", ";
888
889    const Decl *Param = Params->getParam(i);
890    if (const TemplateTypeParmDecl *TTP =
891          dyn_cast<TemplateTypeParmDecl>(Param)) {
892
893      if (TTP->wasDeclaredWithTypename())
894        Out << "typename ";
895      else
896        Out << "class ";
897
898      if (TTP->isParameterPack())
899        Out << "...";
900
901      Out << *TTP;
902
903      if (Args) {
904        Out << " = ";
905        Args->get(i).print(Policy, Out);
906      } else if (TTP->hasDefaultArgument()) {
907        Out << " = ";
908        Out << TTP->getDefaultArgument().getAsString(Policy);
909      };
910    } else if (const NonTypeTemplateParmDecl *NTTP =
911                 dyn_cast<NonTypeTemplateParmDecl>(Param)) {
912      StringRef Name;
913      if (IdentifierInfo *II = NTTP->getIdentifier())
914        Name = II->getName();
915      printDeclType(NTTP->getType(), Name, NTTP->isParameterPack());
916
917      if (Args) {
918        Out << " = ";
919        Args->get(i).print(Policy, Out);
920      } else if (NTTP->hasDefaultArgument()) {
921        Out << " = ";
922        NTTP->getDefaultArgument()->printPretty(Out, nullptr, Policy,
923                                                Indentation);
924      }
925    } else if (const TemplateTemplateParmDecl *TTPD =
926                 dyn_cast<TemplateTemplateParmDecl>(Param)) {
927      VisitTemplateDecl(TTPD);
928      // FIXME: print the default argument, if present.
929    }
930  }
931
932  Out << "> ";
933}
934
935void DeclPrinter::VisitTemplateDecl(const TemplateDecl *D) {
936  PrintTemplateParameters(D->getTemplateParameters());
937
938  if (const TemplateTemplateParmDecl *TTP =
939        dyn_cast<TemplateTemplateParmDecl>(D)) {
940    Out << "class ";
941    if (TTP->isParameterPack())
942      Out << "...";
943    Out << D->getName();
944  } else {
945    Visit(D->getTemplatedDecl());
946  }
947}
948
949void DeclPrinter::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
950  if (PrintInstantiation) {
951    TemplateParameterList *Params = D->getTemplateParameters();
952    for (auto *I : D->specializations()) {
953      prettyPrintPragmas(I);
954      PrintTemplateParameters(Params, I->getTemplateSpecializationArgs());
955      Visit(I);
956    }
957  }
958
959  prettyPrintPragmas(D->getTemplatedDecl());
960  return VisitRedeclarableTemplateDecl(D);
961}
962
963void DeclPrinter::VisitClassTemplateDecl(ClassTemplateDecl *D) {
964  if (PrintInstantiation) {
965    TemplateParameterList *Params = D->getTemplateParameters();
966    for (auto *I : D->specializations()) {
967      PrintTemplateParameters(Params, &I->getTemplateArgs());
968      Visit(I);
969      Out << '\n';
970    }
971  }
972
973  return VisitRedeclarableTemplateDecl(D);
974}
975
976//----------------------------------------------------------------------------
977// Objective-C declarations
978//----------------------------------------------------------------------------
979
980void DeclPrinter::PrintObjCMethodType(ASTContext &Ctx,
981                                      Decl::ObjCDeclQualifier Quals,
982                                      QualType T) {
983  Out << '(';
984  if (Quals & Decl::ObjCDeclQualifier::OBJC_TQ_In)
985    Out << "in ";
986  if (Quals & Decl::ObjCDeclQualifier::OBJC_TQ_Inout)
987    Out << "inout ";
988  if (Quals & Decl::ObjCDeclQualifier::OBJC_TQ_Out)
989    Out << "out ";
990  if (Quals & Decl::ObjCDeclQualifier::OBJC_TQ_Bycopy)
991    Out << "bycopy ";
992  if (Quals & Decl::ObjCDeclQualifier::OBJC_TQ_Byref)
993    Out << "byref ";
994  if (Quals & Decl::ObjCDeclQualifier::OBJC_TQ_Oneway)
995    Out << "oneway ";
996  if (Quals & Decl::ObjCDeclQualifier::OBJC_TQ_CSNullability) {
997    if (auto nullability = AttributedType::stripOuterNullability(T))
998      Out << getNullabilitySpelling(*nullability, true) << ' ';
999  }
1000
1001  Out << Ctx.getUnqualifiedObjCPointerType(T).getAsString(Policy);
1002  Out << ')';
1003}
1004
1005void DeclPrinter::PrintObjCTypeParams(ObjCTypeParamList *Params) {
1006  Out << "<";
1007  unsigned First = true;
1008  for (auto *Param : *Params) {
1009    if (First) {
1010      First = false;
1011    } else {
1012      Out << ", ";
1013    }
1014
1015    switch (Param->getVariance()) {
1016    case ObjCTypeParamVariance::Invariant:
1017      break;
1018
1019    case ObjCTypeParamVariance::Covariant:
1020      Out << "__covariant ";
1021      break;
1022
1023    case ObjCTypeParamVariance::Contravariant:
1024      Out << "__contravariant ";
1025      break;
1026    }
1027
1028    Out << Param->getDeclName().getAsString();
1029
1030    if (Param->hasExplicitBound()) {
1031      Out << " : " << Param->getUnderlyingType().getAsString(Policy);
1032    }
1033  }
1034  Out << ">";
1035}
1036
1037void DeclPrinter::VisitObjCMethodDecl(ObjCMethodDecl *OMD) {
1038  if (OMD->isInstanceMethod())
1039    Out << "- ";
1040  else
1041    Out << "+ ";
1042  if (!OMD->getReturnType().isNull()) {
1043    PrintObjCMethodType(OMD->getASTContext(), OMD->getObjCDeclQualifier(),
1044                        OMD->getReturnType());
1045  }
1046
1047  std::string name = OMD->getSelector().getAsString();
1048  std::string::size_type pos, lastPos = 0;
1049  for (const auto *PI : OMD->params()) {
1050    // FIXME: selector is missing here!
1051    pos = name.find_first_of(':', lastPos);
1052    Out << " " << name.substr(lastPos, pos - lastPos) << ':';
1053    PrintObjCMethodType(OMD->getASTContext(),
1054                        PI->getObjCDeclQualifier(),
1055                        PI->getType());
1056    Out << *PI;
1057    lastPos = pos + 1;
1058  }
1059
1060  if (OMD->param_begin() == OMD->param_end())
1061    Out << " " << name;
1062
1063  if (OMD->isVariadic())
1064      Out << ", ...";
1065
1066  prettyPrintAttributes(OMD);
1067
1068  if (OMD->getBody() && !Policy.TerseOutput) {
1069    Out << ' ';
1070    OMD->getBody()->printPretty(Out, nullptr, Policy);
1071  }
1072  else if (Policy.PolishForDeclaration)
1073    Out << ';';
1074}
1075
1076void DeclPrinter::VisitObjCImplementationDecl(ObjCImplementationDecl *OID) {
1077  std::string I = OID->getNameAsString();
1078  ObjCInterfaceDecl *SID = OID->getSuperClass();
1079
1080  bool eolnOut = false;
1081  if (SID)
1082    Out << "@implementation " << I << " : " << *SID;
1083  else
1084    Out << "@implementation " << I;
1085
1086  if (OID->ivar_size() > 0) {
1087    Out << "{\n";
1088    eolnOut = true;
1089    Indentation += Policy.Indentation;
1090    for (const auto *I : OID->ivars()) {
1091      Indent() << I->getASTContext().getUnqualifiedObjCPointerType(I->getType()).
1092                    getAsString(Policy) << ' ' << *I << ";\n";
1093    }
1094    Indentation -= Policy.Indentation;
1095    Out << "}\n";
1096  }
1097  else if (SID || (OID->decls_begin() != OID->decls_end())) {
1098    Out << "\n";
1099    eolnOut = true;
1100  }
1101  VisitDeclContext(OID, false);
1102  if (!eolnOut)
1103    Out << "\n";
1104  Out << "@end";
1105}
1106
1107void DeclPrinter::VisitObjCInterfaceDecl(ObjCInterfaceDecl *OID) {
1108  std::string I = OID->getNameAsString();
1109  ObjCInterfaceDecl *SID = OID->getSuperClass();
1110
1111  if (!OID->isThisDeclarationADefinition()) {
1112    Out << "@class " << I;
1113
1114    if (auto TypeParams = OID->getTypeParamListAsWritten()) {
1115      PrintObjCTypeParams(TypeParams);
1116    }
1117
1118    Out << ";";
1119    return;
1120  }
1121  bool eolnOut = false;
1122  Out << "@interface " << I;
1123
1124  if (auto TypeParams = OID->getTypeParamListAsWritten()) {
1125    PrintObjCTypeParams(TypeParams);
1126  }
1127
1128  if (SID)
1129    Out << " : " << QualType(OID->getSuperClassType(), 0).getAsString(Policy);
1130
1131  // Protocols?
1132  const ObjCList<ObjCProtocolDecl> &Protocols = OID->getReferencedProtocols();
1133  if (!Protocols.empty()) {
1134    for (ObjCList<ObjCProtocolDecl>::iterator I = Protocols.begin(),
1135         E = Protocols.end(); I != E; ++I)
1136      Out << (I == Protocols.begin() ? '<' : ',') << **I;
1137    Out << "> ";
1138  }
1139
1140  if (OID->ivar_size() > 0) {
1141    Out << "{\n";
1142    eolnOut = true;
1143    Indentation += Policy.Indentation;
1144    for (const auto *I : OID->ivars()) {
1145      Indent() << I->getASTContext()
1146                      .getUnqualifiedObjCPointerType(I->getType())
1147                      .getAsString(Policy) << ' ' << *I << ";\n";
1148    }
1149    Indentation -= Policy.Indentation;
1150    Out << "}\n";
1151  }
1152  else if (SID || (OID->decls_begin() != OID->decls_end())) {
1153    Out << "\n";
1154    eolnOut = true;
1155  }
1156
1157  VisitDeclContext(OID, false);
1158  if (!eolnOut)
1159    Out << "\n";
1160  Out << "@end";
1161  // FIXME: implement the rest...
1162}
1163
1164void DeclPrinter::VisitObjCProtocolDecl(ObjCProtocolDecl *PID) {
1165  if (!PID->isThisDeclarationADefinition()) {
1166    Out << "@protocol " << *PID << ";\n";
1167    return;
1168  }
1169  // Protocols?
1170  const ObjCList<ObjCProtocolDecl> &Protocols = PID->getReferencedProtocols();
1171  if (!Protocols.empty()) {
1172    Out << "@protocol " << *PID;
1173    for (ObjCList<ObjCProtocolDecl>::iterator I = Protocols.begin(),
1174         E = Protocols.end(); I != E; ++I)
1175      Out << (I == Protocols.begin() ? '<' : ',') << **I;
1176    Out << ">\n";
1177  } else
1178    Out << "@protocol " << *PID << '\n';
1179  VisitDeclContext(PID, false);
1180  Out << "@end";
1181}
1182
1183void DeclPrinter::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *PID) {
1184  Out << "@implementation " << *PID->getClassInterface() << '(' << *PID <<")\n";
1185
1186  VisitDeclContext(PID, false);
1187  Out << "@end";
1188  // FIXME: implement the rest...
1189}
1190
1191void DeclPrinter::VisitObjCCategoryDecl(ObjCCategoryDecl *PID) {
1192  Out << "@interface " << *PID->getClassInterface();
1193  if (auto TypeParams = PID->getTypeParamList()) {
1194    PrintObjCTypeParams(TypeParams);
1195  }
1196  Out << "(" << *PID << ")\n";
1197  if (PID->ivar_size() > 0) {
1198    Out << "{\n";
1199    Indentation += Policy.Indentation;
1200    for (const auto *I : PID->ivars())
1201      Indent() << I->getASTContext().getUnqualifiedObjCPointerType(I->getType()).
1202                    getAsString(Policy) << ' ' << *I << ";\n";
1203    Indentation -= Policy.Indentation;
1204    Out << "}\n";
1205  }
1206
1207  VisitDeclContext(PID, false);
1208  Out << "@end";
1209
1210  // FIXME: implement the rest...
1211}
1212
1213void DeclPrinter::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *AID) {
1214  Out << "@compatibility_alias " << *AID
1215      << ' ' << *AID->getClassInterface() << ";\n";
1216}
1217
1218/// PrintObjCPropertyDecl - print a property declaration.
1219///
1220void DeclPrinter::VisitObjCPropertyDecl(ObjCPropertyDecl *PDecl) {
1221  if (PDecl->getPropertyImplementation() == ObjCPropertyDecl::Required)
1222    Out << "@required\n";
1223  else if (PDecl->getPropertyImplementation() == ObjCPropertyDecl::Optional)
1224    Out << "@optional\n";
1225
1226  QualType T = PDecl->getType();
1227
1228  Out << "@property";
1229  if (PDecl->getPropertyAttributes() != ObjCPropertyDecl::OBJC_PR_noattr) {
1230    bool first = true;
1231    Out << " (";
1232    if (PDecl->getPropertyAttributes() &
1233        ObjCPropertyDecl::OBJC_PR_readonly) {
1234      Out << (first ? ' ' : ',') << "readonly";
1235      first = false;
1236    }
1237
1238    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) {
1239      Out << (first ? ' ' : ',') << "getter = ";
1240      PDecl->getGetterName().print(Out);
1241      first = false;
1242    }
1243    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) {
1244      Out << (first ? ' ' : ',') << "setter = ";
1245      PDecl->getSetterName().print(Out);
1246      first = false;
1247    }
1248
1249    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_assign) {
1250      Out << (first ? ' ' : ',') << "assign";
1251      first = false;
1252    }
1253
1254    if (PDecl->getPropertyAttributes() &
1255        ObjCPropertyDecl::OBJC_PR_readwrite) {
1256      Out << (first ? ' ' : ',') << "readwrite";
1257      first = false;
1258    }
1259
1260    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_retain) {
1261      Out << (first ? ' ' : ',') << "retain";
1262      first = false;
1263    }
1264
1265    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_strong) {
1266      Out << (first ? ' ' : ',') << "strong";
1267      first = false;
1268    }
1269
1270    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_copy) {
1271      Out << (first ? ' ' : ',') << "copy";
1272      first = false;
1273    }
1274
1275    if (PDecl->getPropertyAttributes() &
1276        ObjCPropertyDecl::OBJC_PR_nonatomic) {
1277      Out << (first ? ' ' : ',') << "nonatomic";
1278      first = false;
1279    }
1280    if (PDecl->getPropertyAttributes() &
1281        ObjCPropertyDecl::OBJC_PR_atomic) {
1282      Out << (first ? ' ' : ',') << "atomic";
1283      first = false;
1284    }
1285
1286    if (PDecl->getPropertyAttributes() &
1287        ObjCPropertyDecl::OBJC_PR_nullability) {
1288      if (auto nullability = AttributedType::stripOuterNullability(T)) {
1289        if (*nullability == NullabilityKind::Unspecified &&
1290            (PDecl->getPropertyAttributes() &
1291               ObjCPropertyDecl::OBJC_PR_null_resettable)) {
1292          Out << (first ? ' ' : ',') << "null_resettable";
1293        } else {
1294          Out << (first ? ' ' : ',')
1295              << getNullabilitySpelling(*nullability, true);
1296        }
1297        first = false;
1298      }
1299    }
1300
1301    (void) first; // Silence dead store warning due to idiomatic code.
1302    Out << " )";
1303  }
1304  Out << ' ' << PDecl->getASTContext().getUnqualifiedObjCPointerType(T).
1305                  getAsString(Policy) << ' ' << *PDecl;
1306  if (Policy.PolishForDeclaration)
1307    Out << ';';
1308}
1309
1310void DeclPrinter::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *PID) {
1311  if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize)
1312    Out << "@synthesize ";
1313  else
1314    Out << "@dynamic ";
1315  Out << *PID->getPropertyDecl();
1316  if (PID->getPropertyIvarDecl())
1317    Out << '=' << *PID->getPropertyIvarDecl();
1318}
1319
1320void DeclPrinter::VisitUsingDecl(UsingDecl *D) {
1321  if (!D->isAccessDeclaration())
1322    Out << "using ";
1323  if (D->hasTypename())
1324    Out << "typename ";
1325  D->getQualifier()->print(Out, Policy);
1326  Out << *D;
1327}
1328
1329void
1330DeclPrinter::VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D) {
1331  Out << "using typename ";
1332  D->getQualifier()->print(Out, Policy);
1333  Out << D->getDeclName();
1334}
1335
1336void DeclPrinter::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
1337  if (!D->isAccessDeclaration())
1338    Out << "using ";
1339  D->getQualifier()->print(Out, Policy);
1340  Out << D->getDeclName();
1341}
1342
1343void DeclPrinter::VisitUsingShadowDecl(UsingShadowDecl *D) {
1344  // ignore
1345}
1346
1347void DeclPrinter::VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D) {
1348  Out << "#pragma omp threadprivate";
1349  if (!D->varlist_empty()) {
1350    for (OMPThreadPrivateDecl::varlist_iterator I = D->varlist_begin(),
1351                                                E = D->varlist_end();
1352                                                I != E; ++I) {
1353      Out << (I == D->varlist_begin() ? '(' : ',');
1354      NamedDecl *ND = cast<NamedDecl>(cast<DeclRefExpr>(*I)->getDecl());
1355      ND->printQualifiedName(Out);
1356    }
1357    Out << ")";
1358  }
1359}
1360
1361