DeclPrinter.cpp revision ff685c562c8fd5dfc6effec17377fde9dad6f271 
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::dump method, which pretty print 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  public:
41    DeclPrinter(raw_ostream &Out, const PrintingPolicy &Policy,
42                unsigned Indentation = 0, bool PrintInstantiation = false)
43      : Out(Out), Policy(Policy), Indentation(Indentation),
44        PrintInstantiation(PrintInstantiation) { }
45
46    void VisitDeclContext(DeclContext *DC, bool Indent = true);
47
48    void VisitTranslationUnitDecl(TranslationUnitDecl *D);
49    void VisitTypedefDecl(TypedefDecl *D);
50    void VisitTypeAliasDecl(TypeAliasDecl *D);
51    void VisitEnumDecl(EnumDecl *D);
52    void VisitRecordDecl(RecordDecl *D);
53    void VisitEnumConstantDecl(EnumConstantDecl *D);
54    void VisitFunctionDecl(FunctionDecl *D);
55    void VisitFieldDecl(FieldDecl *D);
56    void VisitVarDecl(VarDecl *D);
57    void VisitLabelDecl(LabelDecl *D);
58    void VisitParmVarDecl(ParmVarDecl *D);
59    void VisitFileScopeAsmDecl(FileScopeAsmDecl *D);
60    void VisitImportDecl(ImportDecl *D);
61    void VisitStaticAssertDecl(StaticAssertDecl *D);
62    void VisitNamespaceDecl(NamespaceDecl *D);
63    void VisitUsingDirectiveDecl(UsingDirectiveDecl *D);
64    void VisitNamespaceAliasDecl(NamespaceAliasDecl *D);
65    void VisitCXXRecordDecl(CXXRecordDecl *D);
66    void VisitLinkageSpecDecl(LinkageSpecDecl *D);
67    void VisitTemplateDecl(const TemplateDecl *D);
68    void VisitFunctionTemplateDecl(FunctionTemplateDecl *D);
69    void VisitClassTemplateDecl(ClassTemplateDecl *D);
70    void VisitObjCMethodDecl(ObjCMethodDecl *D);
71    void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
72    void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
73    void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
74    void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
75    void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
76    void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
77    void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
78    void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
79    void VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D);
80    void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D);
81    void VisitUsingDecl(UsingDecl *D);
82    void VisitUsingShadowDecl(UsingShadowDecl *D);
83
84    void PrintTemplateParameters(const TemplateParameterList *Params,
85                                 const TemplateArgumentList *Args);
86    void prettyPrintAttributes(Decl *D);
87  };
88}
89
90void Decl::print(raw_ostream &Out, unsigned Indentation,
91                 bool PrintInstantiation) const {
92  print(Out, getASTContext().getPrintingPolicy(), Indentation, PrintInstantiation);
93}
94
95void Decl::print(raw_ostream &Out, const PrintingPolicy &Policy,
96                 unsigned Indentation, bool PrintInstantiation) const {
97  DeclPrinter Printer(Out, Policy, Indentation, PrintInstantiation);
98  Printer.Visit(const_cast<Decl*>(this));
99}
100
101static QualType GetBaseType(QualType T) {
102  // FIXME: This should be on the Type class!
103  QualType BaseType = T;
104  while (!BaseType->isSpecifierType()) {
105    if (isa<TypedefType>(BaseType))
106      break;
107    else if (const PointerType* PTy = BaseType->getAs<PointerType>())
108      BaseType = PTy->getPointeeType();
109    else if (const BlockPointerType *BPy = BaseType->getAs<BlockPointerType>())
110      BaseType = BPy->getPointeeType();
111    else if (const ArrayType* ATy = dyn_cast<ArrayType>(BaseType))
112      BaseType = ATy->getElementType();
113    else if (const FunctionType* FTy = BaseType->getAs<FunctionType>())
114      BaseType = FTy->getResultType();
115    else if (const VectorType *VTy = BaseType->getAs<VectorType>())
116      BaseType = VTy->getElementType();
117    else if (const ReferenceType *RTy = BaseType->getAs<ReferenceType>())
118      BaseType = RTy->getPointeeType();
119    else
120      llvm_unreachable("Unknown declarator!");
121  }
122  return BaseType;
123}
124
125static QualType getDeclType(Decl* D) {
126  if (TypedefNameDecl* TDD = dyn_cast<TypedefNameDecl>(D))
127    return TDD->getUnderlyingType();
128  if (ValueDecl* VD = dyn_cast<ValueDecl>(D))
129    return VD->getType();
130  return QualType();
131}
132
133void Decl::printGroup(Decl** Begin, unsigned NumDecls,
134                      raw_ostream &Out, const PrintingPolicy &Policy,
135                      unsigned Indentation) {
136  if (NumDecls == 1) {
137    (*Begin)->print(Out, Policy, Indentation);
138    return;
139  }
140
141  Decl** End = Begin + NumDecls;
142  TagDecl* TD = dyn_cast<TagDecl>(*Begin);
143  if (TD)
144    ++Begin;
145
146  PrintingPolicy SubPolicy(Policy);
147  if (TD && TD->isCompleteDefinition()) {
148    TD->print(Out, Policy, Indentation);
149    Out << " ";
150    SubPolicy.SuppressTag = true;
151  }
152
153  bool isFirst = true;
154  for ( ; Begin != End; ++Begin) {
155    if (isFirst) {
156      SubPolicy.SuppressSpecifiers = false;
157      isFirst = false;
158    } else {
159      if (!isFirst) Out << ", ";
160      SubPolicy.SuppressSpecifiers = true;
161    }
162
163    (*Begin)->print(Out, SubPolicy, Indentation);
164  }
165}
166
167void DeclContext::dumpDeclContext() const {
168  // Get the translation unit
169  const DeclContext *DC = this;
170  while (!DC->isTranslationUnit())
171    DC = DC->getParent();
172
173  ASTContext &Ctx = cast<TranslationUnitDecl>(DC)->getASTContext();
174  DeclPrinter Printer(llvm::errs(), Ctx.getPrintingPolicy(), 0);
175  Printer.VisitDeclContext(const_cast<DeclContext *>(this), /*Indent=*/false);
176}
177
178void Decl::dump() const {
179  dump(llvm::errs());
180}
181
182void Decl::dump(raw_ostream &Out) const {
183  PrintingPolicy Policy = getASTContext().getPrintingPolicy();
184  Policy.DumpSourceManager = &getASTContext().getSourceManager();
185  print(Out, Policy, /*Indentation*/ 0, /*PrintInstantiation*/ true);
186}
187
188raw_ostream& DeclPrinter::Indent(unsigned Indentation) {
189  for (unsigned i = 0; i != Indentation; ++i)
190    Out << "  ";
191  return Out;
192}
193
194void DeclPrinter::prettyPrintAttributes(Decl *D) {
195  if (Policy.SuppressAttributes)
196    return;
197
198  if (D->hasAttrs()) {
199    AttrVec &Attrs = D->getAttrs();
200    for (AttrVec::const_iterator i=Attrs.begin(), e=Attrs.end(); i!=e; ++i) {
201      Attr *A = *i;
202      A->printPretty(Out, Policy);
203    }
204  }
205}
206
207void DeclPrinter::ProcessDeclGroup(SmallVectorImpl<Decl*>& Decls) {
208  this->Indent();
209  Decl::printGroup(Decls.data(), Decls.size(), Out, Policy, Indentation);
210  Out << ";\n";
211  Decls.clear();
212
213}
214
215void DeclPrinter::Print(AccessSpecifier AS) {
216  switch(AS) {
217  case AS_none:      llvm_unreachable("No access specifier!");
218  case AS_public:    Out << "public"; break;
219  case AS_protected: Out << "protected"; break;
220  case AS_private:   Out << "private"; break;
221  }
222}
223
224//----------------------------------------------------------------------------
225// Common C declarations
226//----------------------------------------------------------------------------
227
228void DeclPrinter::VisitDeclContext(DeclContext *DC, bool Indent) {
229  if (Policy.TerseOutput)
230    return;
231
232  if (Indent)
233    Indentation += Policy.Indentation;
234
235  SmallVector<Decl*, 2> Decls;
236  for (DeclContext::decl_iterator D = DC->decls_begin(), DEnd = DC->decls_end();
237       D != DEnd; ++D) {
238
239    // Don't print ObjCIvarDecls, as they are printed when visiting the
240    // containing ObjCInterfaceDecl.
241    if (isa<ObjCIvarDecl>(*D))
242      continue;
243
244    if (!Policy.DumpSourceManager) {
245      // Skip over implicit declarations in pretty-printing mode.
246      if (D->isImplicit()) continue;
247      // FIXME: Ugly hack so we don't pretty-print the builtin declaration
248      // of __builtin_va_list or __[u]int128_t.  There should be some other way
249      // to check that.
250      if (NamedDecl *ND = dyn_cast<NamedDecl>(*D)) {
251        if (IdentifierInfo *II = ND->getIdentifier()) {
252          if (II->isStr("__builtin_va_list") ||
253              II->isStr("__int128_t") || II->isStr("__uint128_t"))
254            continue;
255        }
256      }
257    }
258
259    // The next bits of code handles stuff like "struct {int x;} a,b"; we're
260    // forced to merge the declarations because there's no other way to
261    // refer to the struct in question.  This limited merging is safe without
262    // a bunch of other checks because it only merges declarations directly
263    // referring to the tag, not typedefs.
264    //
265    // Check whether the current declaration should be grouped with a previous
266    // unnamed struct.
267    QualType CurDeclType = getDeclType(*D);
268    if (!Decls.empty() && !CurDeclType.isNull()) {
269      QualType BaseType = GetBaseType(CurDeclType);
270      if (!BaseType.isNull() && isa<TagType>(BaseType) &&
271          cast<TagType>(BaseType)->getDecl() == Decls[0]) {
272        Decls.push_back(*D);
273        continue;
274      }
275    }
276
277    // If we have a merged group waiting to be handled, handle it now.
278    if (!Decls.empty())
279      ProcessDeclGroup(Decls);
280
281    // If the current declaration is an unnamed tag type, save it
282    // so we can merge it with the subsequent declaration(s) using it.
283    if (isa<TagDecl>(*D) && !cast<TagDecl>(*D)->getIdentifier()) {
284      Decls.push_back(*D);
285      continue;
286    }
287
288    if (isa<AccessSpecDecl>(*D)) {
289      Indentation -= Policy.Indentation;
290      this->Indent();
291      Print(D->getAccess());
292      Out << ":\n";
293      Indentation += Policy.Indentation;
294      continue;
295    }
296
297    this->Indent();
298    Visit(*D);
299
300    // FIXME: Need to be able to tell the DeclPrinter when
301    const char *Terminator = 0;
302    if (isa<FunctionDecl>(*D) &&
303        cast<FunctionDecl>(*D)->isThisDeclarationADefinition())
304      Terminator = 0;
305    else if (isa<ObjCMethodDecl>(*D) && cast<ObjCMethodDecl>(*D)->getBody())
306      Terminator = 0;
307    else if (isa<NamespaceDecl>(*D) || isa<LinkageSpecDecl>(*D) ||
308             isa<ObjCImplementationDecl>(*D) ||
309             isa<ObjCInterfaceDecl>(*D) ||
310             isa<ObjCProtocolDecl>(*D) ||
311             isa<ObjCCategoryImplDecl>(*D) ||
312             isa<ObjCCategoryDecl>(*D))
313      Terminator = 0;
314    else if (isa<EnumConstantDecl>(*D)) {
315      DeclContext::decl_iterator Next = D;
316      ++Next;
317      if (Next != DEnd)
318        Terminator = ",";
319    } else
320      Terminator = ";";
321
322    if (Terminator)
323      Out << Terminator;
324    Out << "\n";
325  }
326
327  if (!Decls.empty())
328    ProcessDeclGroup(Decls);
329
330  if (Indent)
331    Indentation -= Policy.Indentation;
332}
333
334void DeclPrinter::VisitTranslationUnitDecl(TranslationUnitDecl *D) {
335  VisitDeclContext(D, false);
336}
337
338void DeclPrinter::VisitTypedefDecl(TypedefDecl *D) {
339  if (!Policy.SuppressSpecifiers) {
340    Out << "typedef ";
341
342    if (D->isModulePrivate())
343      Out << "__module_private__ ";
344  }
345  D->getUnderlyingType().print(Out, Policy, D->getName());
346  prettyPrintAttributes(D);
347}
348
349void DeclPrinter::VisitTypeAliasDecl(TypeAliasDecl *D) {
350  Out << "using " << *D << " = " << D->getUnderlyingType().getAsString(Policy);
351}
352
353void DeclPrinter::VisitEnumDecl(EnumDecl *D) {
354  if (!Policy.SuppressSpecifiers && D->isModulePrivate())
355    Out << "__module_private__ ";
356  Out << "enum ";
357  if (D->isScoped()) {
358    if (D->isScopedUsingClassTag())
359      Out << "class ";
360    else
361      Out << "struct ";
362  }
363  Out << *D;
364
365  if (D->isFixed())
366    Out << " : " << D->getIntegerType().stream(Policy);
367
368  if (D->isCompleteDefinition()) {
369    Out << " {\n";
370    VisitDeclContext(D);
371    Indent() << "}";
372  }
373  prettyPrintAttributes(D);
374}
375
376void DeclPrinter::VisitRecordDecl(RecordDecl *D) {
377  if (!Policy.SuppressSpecifiers && D->isModulePrivate())
378    Out << "__module_private__ ";
379  Out << D->getKindName();
380  if (D->getIdentifier())
381    Out << ' ' << *D;
382
383  if (D->isCompleteDefinition()) {
384    Out << " {\n";
385    VisitDeclContext(D);
386    Indent() << "}";
387  }
388}
389
390void DeclPrinter::VisitEnumConstantDecl(EnumConstantDecl *D) {
391  Out << *D;
392  if (Expr *Init = D->getInitExpr()) {
393    Out << " = ";
394    Init->printPretty(Out, 0, Policy, Indentation);
395  }
396}
397
398void DeclPrinter::VisitFunctionDecl(FunctionDecl *D) {
399  if (!Policy.SuppressSpecifiers) {
400    switch (D->getStorageClassAsWritten()) {
401    case SC_None: break;
402    case SC_Extern: Out << "extern "; break;
403    case SC_Static: Out << "static "; break;
404    case SC_PrivateExtern: Out << "__private_extern__ "; break;
405    case SC_Auto: case SC_Register: case SC_OpenCLWorkGroupLocal:
406      llvm_unreachable("invalid for functions");
407    }
408
409    if (D->isInlineSpecified())  Out << "inline ";
410    if (D->isVirtualAsWritten()) Out << "virtual ";
411    if (D->isModulePrivate())    Out << "__module_private__ ";
412  }
413
414  PrintingPolicy SubPolicy(Policy);
415  SubPolicy.SuppressSpecifiers = false;
416  std::string Proto = D->getNameInfo().getAsString();
417
418  QualType Ty = D->getType();
419  while (const ParenType *PT = dyn_cast<ParenType>(Ty)) {
420    Proto = '(' + Proto + ')';
421    Ty = PT->getInnerType();
422  }
423
424  if (isa<FunctionType>(Ty)) {
425    const FunctionType *AFT = Ty->getAs<FunctionType>();
426    const FunctionProtoType *FT = 0;
427    if (D->hasWrittenPrototype())
428      FT = dyn_cast<FunctionProtoType>(AFT);
429
430    Proto += "(";
431    if (FT) {
432      llvm::raw_string_ostream POut(Proto);
433      DeclPrinter ParamPrinter(POut, SubPolicy, Indentation);
434      for (unsigned i = 0, e = D->getNumParams(); i != e; ++i) {
435        if (i) POut << ", ";
436        ParamPrinter.VisitParmVarDecl(D->getParamDecl(i));
437      }
438
439      if (FT->isVariadic()) {
440        if (D->getNumParams()) POut << ", ";
441        POut << "...";
442      }
443    } else if (D->doesThisDeclarationHaveABody() && !D->hasPrototype()) {
444      for (unsigned i = 0, e = D->getNumParams(); i != e; ++i) {
445        if (i)
446          Proto += ", ";
447        Proto += D->getParamDecl(i)->getNameAsString();
448      }
449    }
450
451    Proto += ")";
452
453    if (FT) {
454      if (FT->isConst())
455        Proto += " const";
456      if (FT->isVolatile())
457        Proto += " volatile";
458      if (FT->isRestrict())
459        Proto += " restrict";
460    }
461
462    if (FT && FT->hasDynamicExceptionSpec()) {
463      Proto += " throw(";
464      if (FT->getExceptionSpecType() == EST_MSAny)
465        Proto += "...";
466      else
467        for (unsigned I = 0, N = FT->getNumExceptions(); I != N; ++I) {
468          if (I)
469            Proto += ", ";
470
471          Proto += FT->getExceptionType(I).getAsString(SubPolicy);
472        }
473      Proto += ")";
474    } else if (FT && isNoexceptExceptionSpec(FT->getExceptionSpecType())) {
475      Proto += " noexcept";
476      if (FT->getExceptionSpecType() == EST_ComputedNoexcept) {
477        Proto += "(";
478        llvm::raw_string_ostream EOut(Proto);
479        FT->getNoexceptExpr()->printPretty(EOut, 0, SubPolicy,
480                                           Indentation);
481        EOut.flush();
482        Proto += EOut.str();
483        Proto += ")";
484      }
485    }
486
487    if (CXXConstructorDecl *CDecl = dyn_cast<CXXConstructorDecl>(D)) {
488      bool HasInitializerList = false;
489      for (CXXConstructorDecl::init_const_iterator B = CDecl->init_begin(),
490           E = CDecl->init_end();
491           B != E; ++B) {
492        CXXCtorInitializer * BMInitializer = (*B);
493        if (BMInitializer->isInClassMemberInitializer())
494          continue;
495
496        if (!HasInitializerList) {
497          Proto += " : ";
498          Out << Proto;
499          Proto.clear();
500          HasInitializerList = true;
501        } else
502          Out << ", ";
503
504        if (BMInitializer->isAnyMemberInitializer()) {
505          FieldDecl *FD = BMInitializer->getAnyMember();
506          Out << *FD;
507        } else {
508          Out << QualType(BMInitializer->getBaseClass(), 0).getAsString(Policy);
509        }
510
511        Out << "(";
512        if (!BMInitializer->getInit()) {
513          // Nothing to print
514        } else {
515          Expr *Init = BMInitializer->getInit();
516          if (ExprWithCleanups *Tmp = dyn_cast<ExprWithCleanups>(Init))
517            Init = Tmp->getSubExpr();
518
519          Init = Init->IgnoreParens();
520
521          Expr *SimpleInit = 0;
522          Expr **Args = 0;
523          unsigned NumArgs = 0;
524          if (ParenListExpr *ParenList = dyn_cast<ParenListExpr>(Init)) {
525            Args = ParenList->getExprs();
526            NumArgs = ParenList->getNumExprs();
527          } else if (CXXConstructExpr *Construct
528                                        = dyn_cast<CXXConstructExpr>(Init)) {
529            Args = Construct->getArgs();
530            NumArgs = Construct->getNumArgs();
531          } else
532            SimpleInit = Init;
533
534          if (SimpleInit)
535            SimpleInit->printPretty(Out, 0, Policy, Indentation);
536          else {
537            for (unsigned I = 0; I != NumArgs; ++I) {
538              if (isa<CXXDefaultArgExpr>(Args[I]))
539                break;
540
541              if (I)
542                Out << ", ";
543              Args[I]->printPretty(Out, 0, Policy, Indentation);
544            }
545          }
546        }
547        Out << ")";
548      }
549    }
550    else
551      AFT->getResultType().print(Out, Policy, Proto);
552  } else {
553    Ty.print(Out, Policy, Proto);
554  }
555
556  prettyPrintAttributes(D);
557
558  if (D->isPure())
559    Out << " = 0";
560  else if (D->isDeletedAsWritten())
561    Out << " = delete";
562  else if (D->doesThisDeclarationHaveABody() && !Policy.TerseOutput) {
563    if (!D->hasPrototype() && D->getNumParams()) {
564      // This is a K&R function definition, so we need to print the
565      // parameters.
566      Out << '\n';
567      DeclPrinter ParamPrinter(Out, SubPolicy, Indentation);
568      Indentation += Policy.Indentation;
569      for (unsigned i = 0, e = D->getNumParams(); i != e; ++i) {
570        Indent();
571        ParamPrinter.VisitParmVarDecl(D->getParamDecl(i));
572        Out << ";\n";
573      }
574      Indentation -= Policy.Indentation;
575    } else
576      Out << ' ';
577
578    D->getBody()->printPretty(Out, 0, SubPolicy, Indentation);
579    Out << '\n';
580  }
581}
582
583void DeclPrinter::VisitFieldDecl(FieldDecl *D) {
584  if (!Policy.SuppressSpecifiers && D->isMutable())
585    Out << "mutable ";
586  if (!Policy.SuppressSpecifiers && D->isModulePrivate())
587    Out << "__module_private__ ";
588
589  Out << D->getType().stream(Policy, D->getName());
590
591  if (D->isBitField()) {
592    Out << " : ";
593    D->getBitWidth()->printPretty(Out, 0, Policy, Indentation);
594  }
595
596  Expr *Init = D->getInClassInitializer();
597  if (!Policy.SuppressInitializers && Init) {
598    if (D->getInClassInitStyle() == ICIS_ListInit)
599      Out << " ";
600    else
601      Out << " = ";
602    Init->printPretty(Out, 0, Policy, Indentation);
603  }
604  prettyPrintAttributes(D);
605}
606
607void DeclPrinter::VisitLabelDecl(LabelDecl *D) {
608  Out << *D << ":";
609}
610
611
612void DeclPrinter::VisitVarDecl(VarDecl *D) {
613  StorageClass SCAsWritten = D->getStorageClassAsWritten();
614  if (!Policy.SuppressSpecifiers && SCAsWritten != SC_None)
615    Out << VarDecl::getStorageClassSpecifierString(SCAsWritten) << " ";
616
617  if (!Policy.SuppressSpecifiers && D->isThreadSpecified())
618    Out << "__thread ";
619  if (!Policy.SuppressSpecifiers && D->isModulePrivate())
620    Out << "__module_private__ ";
621
622  QualType T = D->getType();
623  if (ParmVarDecl *Parm = dyn_cast<ParmVarDecl>(D))
624    T = Parm->getOriginalType();
625  T.print(Out, Policy, D->getName());
626  Expr *Init = D->getInit();
627  if (!Policy.SuppressInitializers && Init) {
628    bool ImplicitInit = false;
629    if (CXXConstructExpr *Construct = dyn_cast<CXXConstructExpr>(Init))
630      ImplicitInit = D->getInitStyle() == VarDecl::CallInit &&
631          Construct->getNumArgs() == 0 && !Construct->isListInitialization();
632    if (!ImplicitInit) {
633      if ((D->getInitStyle() == VarDecl::CallInit) && !isa<ParenListExpr>(Init))
634        Out << "(";
635      else if (D->getInitStyle() == VarDecl::CInit) {
636        Out << " = ";
637      }
638      Init->printPretty(Out, 0, Policy, Indentation);
639      if ((D->getInitStyle() == VarDecl::CallInit) && !isa<ParenListExpr>(Init))
640        Out << ")";
641    }
642  }
643  prettyPrintAttributes(D);
644}
645
646void DeclPrinter::VisitParmVarDecl(ParmVarDecl *D) {
647  VisitVarDecl(D);
648}
649
650void DeclPrinter::VisitFileScopeAsmDecl(FileScopeAsmDecl *D) {
651  Out << "__asm (";
652  D->getAsmString()->printPretty(Out, 0, Policy, Indentation);
653  Out << ")";
654}
655
656void DeclPrinter::VisitImportDecl(ImportDecl *D) {
657  Out << "@__experimental_modules_import " << D->getImportedModule()->getFullModuleName()
658      << ";\n";
659}
660
661void DeclPrinter::VisitStaticAssertDecl(StaticAssertDecl *D) {
662  Out << "static_assert(";
663  D->getAssertExpr()->printPretty(Out, 0, Policy, Indentation);
664  Out << ", ";
665  D->getMessage()->printPretty(Out, 0, Policy, Indentation);
666  Out << ")";
667}
668
669//----------------------------------------------------------------------------
670// C++ declarations
671//----------------------------------------------------------------------------
672void DeclPrinter::VisitNamespaceDecl(NamespaceDecl *D) {
673  if (D->isInline())
674    Out << "inline ";
675  Out << "namespace " << *D << " {\n";
676  VisitDeclContext(D);
677  Indent() << "}";
678}
679
680void DeclPrinter::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
681  Out << "using namespace ";
682  if (D->getQualifier())
683    D->getQualifier()->print(Out, Policy);
684  Out << *D->getNominatedNamespaceAsWritten();
685}
686
687void DeclPrinter::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
688  Out << "namespace " << *D << " = ";
689  if (D->getQualifier())
690    D->getQualifier()->print(Out, Policy);
691  Out << *D->getAliasedNamespace();
692}
693
694void DeclPrinter::VisitCXXRecordDecl(CXXRecordDecl *D) {
695  if (!Policy.SuppressSpecifiers && D->isModulePrivate())
696    Out << "__module_private__ ";
697  Out << D->getKindName();
698  if (D->getIdentifier())
699    Out << ' ' << *D;
700
701  if (D->isCompleteDefinition()) {
702    // Print the base classes
703    if (D->getNumBases()) {
704      Out << " : ";
705      for (CXXRecordDecl::base_class_iterator Base = D->bases_begin(),
706             BaseEnd = D->bases_end(); Base != BaseEnd; ++Base) {
707        if (Base != D->bases_begin())
708          Out << ", ";
709
710        if (Base->isVirtual())
711          Out << "virtual ";
712
713        AccessSpecifier AS = Base->getAccessSpecifierAsWritten();
714        if (AS != AS_none)
715          Print(AS);
716        Out << " " << Base->getType().getAsString(Policy);
717
718        if (Base->isPackExpansion())
719          Out << "...";
720      }
721    }
722
723    // Print the class definition
724    // FIXME: Doesn't print access specifiers, e.g., "public:"
725    Out << " {\n";
726    VisitDeclContext(D);
727    Indent() << "}";
728  }
729}
730
731void DeclPrinter::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
732  const char *l;
733  if (D->getLanguage() == LinkageSpecDecl::lang_c)
734    l = "C";
735  else {
736    assert(D->getLanguage() == LinkageSpecDecl::lang_cxx &&
737           "unknown language in linkage specification");
738    l = "C++";
739  }
740
741  Out << "extern \"" << l << "\" ";
742  if (D->hasBraces()) {
743    Out << "{\n";
744    VisitDeclContext(D);
745    Indent() << "}";
746  } else
747    Visit(*D->decls_begin());
748}
749
750void DeclPrinter::PrintTemplateParameters(
751    const TemplateParameterList *Params, const TemplateArgumentList *Args = 0) {
752  assert(Params);
753  assert(!Args || Params->size() == Args->size());
754
755  Out << "template <";
756
757  for (unsigned i = 0, e = Params->size(); i != e; ++i) {
758    if (i != 0)
759      Out << ", ";
760
761    const Decl *Param = Params->getParam(i);
762    if (const TemplateTypeParmDecl *TTP =
763          dyn_cast<TemplateTypeParmDecl>(Param)) {
764
765      if (TTP->wasDeclaredWithTypename())
766        Out << "typename ";
767      else
768        Out << "class ";
769
770      if (TTP->isParameterPack())
771        Out << "... ";
772
773      Out << *TTP;
774
775      if (Args) {
776        Out << " = ";
777        Args->get(i).print(Policy, Out);
778      } else if (TTP->hasDefaultArgument()) {
779        Out << " = ";
780        Out << TTP->getDefaultArgument().getAsString(Policy);
781      };
782    } else if (const NonTypeTemplateParmDecl *NTTP =
783                 dyn_cast<NonTypeTemplateParmDecl>(Param)) {
784      Out << NTTP->getType().getAsString(Policy);
785
786      if (NTTP->isParameterPack() && !isa<PackExpansionType>(NTTP->getType()))
787        Out << "...";
788
789      if (IdentifierInfo *Name = NTTP->getIdentifier()) {
790        Out << ' ';
791        Out << Name->getName();
792      }
793
794      if (Args) {
795        Out << " = ";
796        Args->get(i).print(Policy, Out);
797      } else if (NTTP->hasDefaultArgument()) {
798        Out << " = ";
799        NTTP->getDefaultArgument()->printPretty(Out, 0, Policy, Indentation);
800      }
801    } else if (const TemplateTemplateParmDecl *TTPD =
802                 dyn_cast<TemplateTemplateParmDecl>(Param)) {
803      VisitTemplateDecl(TTPD);
804      // FIXME: print the default argument, if present.
805    }
806  }
807
808  Out << "> ";
809}
810
811void DeclPrinter::VisitTemplateDecl(const TemplateDecl *D) {
812  PrintTemplateParameters(D->getTemplateParameters());
813
814  if (const TemplateTemplateParmDecl *TTP =
815        dyn_cast<TemplateTemplateParmDecl>(D)) {
816    Out << "class ";
817    if (TTP->isParameterPack())
818      Out << "...";
819    Out << D->getName();
820  } else {
821    Visit(D->getTemplatedDecl());
822  }
823}
824
825void DeclPrinter::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
826  if (PrintInstantiation) {
827    TemplateParameterList *Params = D->getTemplateParameters();
828    for (FunctionTemplateDecl::spec_iterator I = D->spec_begin(), E = D->spec_end();
829         I != E; ++I) {
830      PrintTemplateParameters(Params, (*I)->getTemplateSpecializationArgs());
831      Visit(*I);
832    }
833  }
834
835  return VisitRedeclarableTemplateDecl(D);
836}
837
838void DeclPrinter::VisitClassTemplateDecl(ClassTemplateDecl *D) {
839  if (PrintInstantiation) {
840    TemplateParameterList *Params = D->getTemplateParameters();
841    for (ClassTemplateDecl::spec_iterator I = D->spec_begin(), E = D->spec_end();
842         I != E; ++I) {
843      PrintTemplateParameters(Params, &(*I)->getTemplateArgs());
844      Visit(*I);
845      Out << '\n';
846    }
847  }
848
849  return VisitRedeclarableTemplateDecl(D);
850}
851
852//----------------------------------------------------------------------------
853// Objective-C declarations
854//----------------------------------------------------------------------------
855
856void DeclPrinter::VisitObjCMethodDecl(ObjCMethodDecl *OMD) {
857  if (OMD->isInstanceMethod())
858    Out << "- ";
859  else
860    Out << "+ ";
861  if (!OMD->getResultType().isNull())
862    Out << '(' << OMD->getResultType().getAsString(Policy) << ")";
863
864  std::string name = OMD->getSelector().getAsString();
865  std::string::size_type pos, lastPos = 0;
866  for (ObjCMethodDecl::param_iterator PI = OMD->param_begin(),
867       E = OMD->param_end(); PI != E; ++PI) {
868    // FIXME: selector is missing here!
869    pos = name.find_first_of(':', lastPos);
870    Out << " " << name.substr(lastPos, pos - lastPos);
871    Out << ":(" << (*PI)->getType().getAsString(Policy) << ')' << **PI;
872    lastPos = pos + 1;
873  }
874
875  if (OMD->param_begin() == OMD->param_end())
876    Out << " " << name;
877
878  if (OMD->isVariadic())
879      Out << ", ...";
880
881  if (OMD->getBody() && !Policy.TerseOutput) {
882    Out << ' ';
883    OMD->getBody()->printPretty(Out, 0, Policy);
884    Out << '\n';
885  }
886}
887
888void DeclPrinter::VisitObjCImplementationDecl(ObjCImplementationDecl *OID) {
889  std::string I = OID->getNameAsString();
890  ObjCInterfaceDecl *SID = OID->getSuperClass();
891
892  if (SID)
893    Out << "@implementation " << I << " : " << *SID;
894  else
895    Out << "@implementation " << I;
896
897  if (OID->ivar_size() > 0) {
898    Out << "{\n";
899    Indentation += Policy.Indentation;
900    for (ObjCImplementationDecl::ivar_iterator I = OID->ivar_begin(),
901         E = OID->ivar_end(); I != E; ++I) {
902      Indent() << I->getType().getAsString(Policy) << ' ' << **I << ";\n";
903    }
904    Indentation -= Policy.Indentation;
905    Out << "}\n";
906  }
907  VisitDeclContext(OID, false);
908  Out << "@end";
909}
910
911void DeclPrinter::VisitObjCInterfaceDecl(ObjCInterfaceDecl *OID) {
912  std::string I = OID->getNameAsString();
913  ObjCInterfaceDecl *SID = OID->getSuperClass();
914
915  if (!OID->isThisDeclarationADefinition()) {
916    Out << "@class " << I << ";";
917    return;
918  }
919
920  if (SID)
921    Out << "@interface " << I << " : " << *SID;
922  else
923    Out << "@interface " << I;
924
925  // Protocols?
926  const ObjCList<ObjCProtocolDecl> &Protocols = OID->getReferencedProtocols();
927  if (!Protocols.empty()) {
928    for (ObjCList<ObjCProtocolDecl>::iterator I = Protocols.begin(),
929         E = Protocols.end(); I != E; ++I)
930      Out << (I == Protocols.begin() ? '<' : ',') << **I;
931  }
932
933  if (!Protocols.empty())
934    Out << "> ";
935
936  if (OID->ivar_size() > 0) {
937    Out << "{\n";
938    Indentation += Policy.Indentation;
939    for (ObjCInterfaceDecl::ivar_iterator I = OID->ivar_begin(),
940         E = OID->ivar_end(); I != E; ++I) {
941      Indent() << I->getType().getAsString(Policy) << ' ' << **I << ";\n";
942    }
943    Indentation -= Policy.Indentation;
944    Out << "}\n";
945  }
946
947  VisitDeclContext(OID, false);
948  Out << "@end";
949  // FIXME: implement the rest...
950}
951
952void DeclPrinter::VisitObjCProtocolDecl(ObjCProtocolDecl *PID) {
953  if (!PID->isThisDeclarationADefinition()) {
954    Out << "@protocol " << PID->getIdentifier() << ";\n";
955    return;
956  }
957
958  Out << "@protocol " << *PID << '\n';
959  VisitDeclContext(PID, false);
960  Out << "@end";
961}
962
963void DeclPrinter::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *PID) {
964  Out << "@implementation " << *PID->getClassInterface() << '(' << *PID <<")\n";
965
966  VisitDeclContext(PID, false);
967  Out << "@end";
968  // FIXME: implement the rest...
969}
970
971void DeclPrinter::VisitObjCCategoryDecl(ObjCCategoryDecl *PID) {
972  Out << "@interface " << *PID->getClassInterface() << '(' << *PID << ")\n";
973  if (PID->ivar_size() > 0) {
974    Out << "{\n";
975    Indentation += Policy.Indentation;
976    for (ObjCCategoryDecl::ivar_iterator I = PID->ivar_begin(),
977         E = PID->ivar_end(); I != E; ++I) {
978      Indent() << I->getType().getAsString(Policy) << ' ' << **I << ";\n";
979    }
980    Indentation -= Policy.Indentation;
981    Out << "}\n";
982  }
983
984  VisitDeclContext(PID, false);
985  Out << "@end";
986
987  // FIXME: implement the rest...
988}
989
990void DeclPrinter::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *AID) {
991  Out << "@compatibility_alias " << *AID
992      << ' ' << *AID->getClassInterface() << ";\n";
993}
994
995/// PrintObjCPropertyDecl - print a property declaration.
996///
997void DeclPrinter::VisitObjCPropertyDecl(ObjCPropertyDecl *PDecl) {
998  if (PDecl->getPropertyImplementation() == ObjCPropertyDecl::Required)
999    Out << "@required\n";
1000  else if (PDecl->getPropertyImplementation() == ObjCPropertyDecl::Optional)
1001    Out << "@optional\n";
1002
1003  Out << "@property";
1004  if (PDecl->getPropertyAttributes() != ObjCPropertyDecl::OBJC_PR_noattr) {
1005    bool first = true;
1006    Out << " (";
1007    if (PDecl->getPropertyAttributes() &
1008        ObjCPropertyDecl::OBJC_PR_readonly) {
1009      Out << (first ? ' ' : ',') << "readonly";
1010      first = false;
1011    }
1012
1013    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) {
1014      Out << (first ? ' ' : ',') << "getter = "
1015          << PDecl->getGetterName().getAsString();
1016      first = false;
1017    }
1018    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) {
1019      Out << (first ? ' ' : ',') << "setter = "
1020          << PDecl->getSetterName().getAsString();
1021      first = false;
1022    }
1023
1024    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_assign) {
1025      Out << (first ? ' ' : ',') << "assign";
1026      first = false;
1027    }
1028
1029    if (PDecl->getPropertyAttributes() &
1030        ObjCPropertyDecl::OBJC_PR_readwrite) {
1031      Out << (first ? ' ' : ',') << "readwrite";
1032      first = false;
1033    }
1034
1035    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_retain) {
1036      Out << (first ? ' ' : ',') << "retain";
1037      first = false;
1038    }
1039
1040    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_strong) {
1041      Out << (first ? ' ' : ',') << "strong";
1042      first = false;
1043    }
1044
1045    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_copy) {
1046      Out << (first ? ' ' : ',') << "copy";
1047      first = false;
1048    }
1049
1050    if (PDecl->getPropertyAttributes() &
1051        ObjCPropertyDecl::OBJC_PR_nonatomic) {
1052      Out << (first ? ' ' : ',') << "nonatomic";
1053      first = false;
1054    }
1055    if (PDecl->getPropertyAttributes() &
1056        ObjCPropertyDecl::OBJC_PR_atomic) {
1057      Out << (first ? ' ' : ',') << "atomic";
1058      first = false;
1059    }
1060
1061    (void) first; // Silence dead store warning due to idiomatic code.
1062    Out << " )";
1063  }
1064  Out << ' ' << PDecl->getType().getAsString(Policy) << ' ' << *PDecl;
1065}
1066
1067void DeclPrinter::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *PID) {
1068  if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize)
1069    Out << "@synthesize ";
1070  else
1071    Out << "@dynamic ";
1072  Out << *PID->getPropertyDecl();
1073  if (PID->getPropertyIvarDecl())
1074    Out << '=' << *PID->getPropertyIvarDecl();
1075}
1076
1077void DeclPrinter::VisitUsingDecl(UsingDecl *D) {
1078  Out << "using ";
1079  D->getQualifier()->print(Out, Policy);
1080  Out << *D;
1081}
1082
1083void
1084DeclPrinter::VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D) {
1085  Out << "using typename ";
1086  D->getQualifier()->print(Out, Policy);
1087  Out << D->getDeclName();
1088}
1089
1090void DeclPrinter::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
1091  Out << "using ";
1092  D->getQualifier()->print(Out, Policy);
1093  Out << D->getDeclName();
1094}
1095
1096void DeclPrinter::VisitUsingShadowDecl(UsingShadowDecl *D) {
1097  // ignore
1098}
1099