DeclPrinter.cpp revision 1bfb00dabf83d8c8b95b7276b4c0ae3fd64832c8 
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/DeclVisitor.h"
16#include "clang/AST/Decl.h"
17#include "clang/AST/DeclCXX.h"
18#include "clang/AST/DeclObjC.h"
19#include "clang/AST/Expr.h"
20#include "clang/AST/ExprCXX.h"
21#include "clang/AST/PrettyPrinter.h"
22#include "clang/Basic/Module.h"
23#include "llvm/Support/raw_ostream.h"
24using namespace clang;
25
26namespace {
27  class DeclPrinter : public DeclVisitor<DeclPrinter> {
28    raw_ostream &Out;
29    PrintingPolicy Policy;
30    unsigned Indentation;
31    bool PrintInstantiation;
32
33    raw_ostream& Indent() { return Indent(Indentation); }
34    raw_ostream& Indent(unsigned Indentation);
35    void ProcessDeclGroup(SmallVectorImpl<Decl*>& Decls);
36
37    void Print(AccessSpecifier AS);
38
39  public:
40    DeclPrinter(raw_ostream &Out, const PrintingPolicy &Policy,
41                unsigned Indentation = 0, bool PrintInstantiation = false)
42      : Out(Out), Policy(Policy), Indentation(Indentation),
43        PrintInstantiation(PrintInstantiation) { }
44
45    void VisitDeclContext(DeclContext *DC, bool Indent = true);
46
47    void VisitTranslationUnitDecl(TranslationUnitDecl *D);
48    void VisitTypedefDecl(TypedefDecl *D);
49    void VisitTypeAliasDecl(TypeAliasDecl *D);
50    void VisitEnumDecl(EnumDecl *D);
51    void VisitRecordDecl(RecordDecl *D);
52    void VisitEnumConstantDecl(EnumConstantDecl *D);
53    void VisitFunctionDecl(FunctionDecl *D);
54    void VisitFieldDecl(FieldDecl *D);
55    void VisitVarDecl(VarDecl *D);
56    void VisitLabelDecl(LabelDecl *D);
57    void VisitParmVarDecl(ParmVarDecl *D);
58    void VisitFileScopeAsmDecl(FileScopeAsmDecl *D);
59    void VisitImportDecl(ImportDecl *D);
60    void VisitStaticAssertDecl(StaticAssertDecl *D);
61    void VisitNamespaceDecl(NamespaceDecl *D);
62    void VisitUsingDirectiveDecl(UsingDirectiveDecl *D);
63    void VisitNamespaceAliasDecl(NamespaceAliasDecl *D);
64    void VisitCXXRecordDecl(CXXRecordDecl *D);
65    void VisitLinkageSpecDecl(LinkageSpecDecl *D);
66    void VisitTemplateDecl(const TemplateDecl *D);
67    void VisitFunctionTemplateDecl(FunctionTemplateDecl *D);
68    void VisitClassTemplateDecl(ClassTemplateDecl *D);
69    void VisitObjCMethodDecl(ObjCMethodDecl *D);
70    void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
71    void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
72    void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
73    void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
74    void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
75    void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
76    void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
77    void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
78    void VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D);
79    void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D);
80    void VisitUsingDecl(UsingDecl *D);
81    void VisitUsingShadowDecl(UsingShadowDecl *D);
82
83    void PrintTemplateParameters(const TemplateParameterList *Params,
84                                 const TemplateArgumentList *Args);
85    void prettyPrintAttributes(Decl *D);
86  };
87}
88
89void Decl::print(raw_ostream &Out, unsigned Indentation,
90                 bool PrintInstantiation) const {
91  print(Out, getASTContext().getPrintingPolicy(), Indentation, PrintInstantiation);
92}
93
94void Decl::print(raw_ostream &Out, const PrintingPolicy &Policy,
95                 unsigned Indentation, bool PrintInstantiation) const {
96  DeclPrinter Printer(Out, Policy, Indentation, PrintInstantiation);
97  Printer.Visit(const_cast<Decl*>(this));
98}
99
100static QualType GetBaseType(QualType T) {
101  // FIXME: This should be on the Type class!
102  QualType BaseType = T;
103  while (!BaseType->isSpecifierType()) {
104    if (isa<TypedefType>(BaseType))
105      break;
106    else if (const PointerType* PTy = BaseType->getAs<PointerType>())
107      BaseType = PTy->getPointeeType();
108    else if (const BlockPointerType *BPy = BaseType->getAs<BlockPointerType>())
109      BaseType = BPy->getPointeeType();
110    else if (const ArrayType* ATy = dyn_cast<ArrayType>(BaseType))
111      BaseType = ATy->getElementType();
112    else if (const FunctionType* FTy = BaseType->getAs<FunctionType>())
113      BaseType = FTy->getResultType();
114    else if (const VectorType *VTy = BaseType->getAs<VectorType>())
115      BaseType = VTy->getElementType();
116    else if (const ReferenceType *RTy = BaseType->getAs<ReferenceType>())
117      BaseType = RTy->getPointeeType();
118    else
119      llvm_unreachable("Unknown declarator!");
120  }
121  return BaseType;
122}
123
124static QualType getDeclType(Decl* D) {
125  if (TypedefNameDecl* TDD = dyn_cast<TypedefNameDecl>(D))
126    return TDD->getUnderlyingType();
127  if (ValueDecl* VD = dyn_cast<ValueDecl>(D))
128    return VD->getType();
129  return QualType();
130}
131
132void Decl::printGroup(Decl** Begin, unsigned NumDecls,
133                      raw_ostream &Out, const PrintingPolicy &Policy,
134                      unsigned Indentation) {
135  if (NumDecls == 1) {
136    (*Begin)->print(Out, Policy, Indentation);
137    return;
138  }
139
140  Decl** End = Begin + NumDecls;
141  TagDecl* TD = dyn_cast<TagDecl>(*Begin);
142  if (TD)
143    ++Begin;
144
145  PrintingPolicy SubPolicy(Policy);
146  if (TD && TD->isCompleteDefinition()) {
147    TD->print(Out, Policy, Indentation);
148    Out << " ";
149    SubPolicy.SuppressTag = true;
150  }
151
152  bool isFirst = true;
153  for ( ; Begin != End; ++Begin) {
154    if (isFirst) {
155      SubPolicy.SuppressSpecifiers = false;
156      isFirst = false;
157    } else {
158      if (!isFirst) Out << ", ";
159      SubPolicy.SuppressSpecifiers = true;
160    }
161
162    (*Begin)->print(Out, SubPolicy, Indentation);
163  }
164}
165
166void DeclContext::dumpDeclContext() const {
167  // Get the translation unit
168  const DeclContext *DC = this;
169  while (!DC->isTranslationUnit())
170    DC = DC->getParent();
171
172  ASTContext &Ctx = cast<TranslationUnitDecl>(DC)->getASTContext();
173  DeclPrinter Printer(llvm::errs(), Ctx.getPrintingPolicy(), 0);
174  Printer.VisitDeclContext(const_cast<DeclContext *>(this), /*Indent=*/false);
175}
176
177void Decl::dump() const {
178  dump(llvm::errs());
179}
180
181void Decl::dump(raw_ostream &Out) const {
182  PrintingPolicy Policy = getASTContext().getPrintingPolicy();
183  Policy.DumpSourceManager = &getASTContext().getSourceManager();
184  print(Out, Policy, /*Indentation*/ 0, /*PrintInstantiation*/ true);
185}
186
187raw_ostream& DeclPrinter::Indent(unsigned Indentation) {
188  for (unsigned i = 0; i != Indentation; ++i)
189    Out << "  ";
190  return Out;
191}
192
193void DeclPrinter::prettyPrintAttributes(Decl *D) {
194  if (Policy.SuppressAttributes)
195    return;
196
197  if (D->hasAttrs()) {
198    AttrVec &Attrs = D->getAttrs();
199    for (AttrVec::const_iterator i=Attrs.begin(), e=Attrs.end(); i!=e; ++i) {
200      Attr *A = *i;
201      A->printPretty(Out, Policy);
202    }
203  }
204}
205
206void DeclPrinter::ProcessDeclGroup(SmallVectorImpl<Decl*>& Decls) {
207  this->Indent();
208  Decl::printGroup(Decls.data(), Decls.size(), Out, Policy, Indentation);
209  Out << ";\n";
210  Decls.clear();
211
212}
213
214void DeclPrinter::Print(AccessSpecifier AS) {
215  switch(AS) {
216  case AS_none:      llvm_unreachable("No access specifier!");
217  case AS_public:    Out << "public"; break;
218  case AS_protected: Out << "protected"; break;
219  case AS_private:   Out << "private"; break;
220  }
221}
222
223//----------------------------------------------------------------------------
224// Common C declarations
225//----------------------------------------------------------------------------
226
227void DeclPrinter::VisitDeclContext(DeclContext *DC, bool Indent) {
228  if (Policy.TerseOutput)
229    return;
230
231  if (Indent)
232    Indentation += Policy.Indentation;
233
234  SmallVector<Decl*, 2> Decls;
235  for (DeclContext::decl_iterator D = DC->decls_begin(), DEnd = DC->decls_end();
236       D != DEnd; ++D) {
237
238    // Don't print ObjCIvarDecls, as they are printed when visiting the
239    // containing ObjCInterfaceDecl.
240    if (isa<ObjCIvarDecl>(*D))
241      continue;
242
243    if (!Policy.DumpSourceManager) {
244      // Skip over implicit declarations in pretty-printing mode.
245      if (D->isImplicit()) continue;
246      // FIXME: Ugly hack so we don't pretty-print the builtin declaration
247      // of __builtin_va_list or __[u]int128_t.  There should be some other way
248      // to check that.
249      if (NamedDecl *ND = dyn_cast<NamedDecl>(*D)) {
250        if (IdentifierInfo *II = ND->getIdentifier()) {
251          if (II->isStr("__builtin_va_list") ||
252              II->isStr("__int128_t") || II->isStr("__uint128_t"))
253            continue;
254        }
255      }
256    }
257
258    // The next bits of code handles stuff like "struct {int x;} a,b"; we're
259    // forced to merge the declarations because there's no other way to
260    // refer to the struct in question.  This limited merging is safe without
261    // a bunch of other checks because it only merges declarations directly
262    // referring to the tag, not typedefs.
263    //
264    // Check whether the current declaration should be grouped with a previous
265    // unnamed struct.
266    QualType CurDeclType = getDeclType(*D);
267    if (!Decls.empty() && !CurDeclType.isNull()) {
268      QualType BaseType = GetBaseType(CurDeclType);
269      if (!BaseType.isNull() && isa<TagType>(BaseType) &&
270          cast<TagType>(BaseType)->getDecl() == Decls[0]) {
271        Decls.push_back(*D);
272        continue;
273      }
274    }
275
276    // If we have a merged group waiting to be handled, handle it now.
277    if (!Decls.empty())
278      ProcessDeclGroup(Decls);
279
280    // If the current declaration is an unnamed tag type, save it
281    // so we can merge it with the subsequent declaration(s) using it.
282    if (isa<TagDecl>(*D) && !cast<TagDecl>(*D)->getIdentifier()) {
283      Decls.push_back(*D);
284      continue;
285    }
286
287    if (isa<AccessSpecDecl>(*D)) {
288      Indentation -= Policy.Indentation;
289      this->Indent();
290      Print(D->getAccess());
291      Out << ":\n";
292      Indentation += Policy.Indentation;
293      continue;
294    }
295
296    this->Indent();
297    Visit(*D);
298
299    // FIXME: Need to be able to tell the DeclPrinter when
300    const char *Terminator = 0;
301    if (isa<FunctionDecl>(*D) &&
302        cast<FunctionDecl>(*D)->isThisDeclarationADefinition())
303      Terminator = 0;
304    else if (isa<ObjCMethodDecl>(*D) && cast<ObjCMethodDecl>(*D)->getBody())
305      Terminator = 0;
306    else if (isa<NamespaceDecl>(*D) || isa<LinkageSpecDecl>(*D) ||
307             isa<ObjCImplementationDecl>(*D) ||
308             isa<ObjCInterfaceDecl>(*D) ||
309             isa<ObjCProtocolDecl>(*D) ||
310             isa<ObjCCategoryImplDecl>(*D) ||
311             isa<ObjCCategoryDecl>(*D))
312      Terminator = 0;
313    else if (isa<EnumConstantDecl>(*D)) {
314      DeclContext::decl_iterator Next = D;
315      ++Next;
316      if (Next != DEnd)
317        Terminator = ",";
318    } else
319      Terminator = ";";
320
321    if (Terminator)
322      Out << Terminator;
323    Out << "\n";
324  }
325
326  if (!Decls.empty())
327    ProcessDeclGroup(Decls);
328
329  if (Indent)
330    Indentation -= Policy.Indentation;
331}
332
333void DeclPrinter::VisitTranslationUnitDecl(TranslationUnitDecl *D) {
334  VisitDeclContext(D, false);
335}
336
337void DeclPrinter::VisitTypedefDecl(TypedefDecl *D) {
338  if (!Policy.SuppressSpecifiers) {
339    Out << "typedef ";
340
341    if (D->isModulePrivate())
342      Out << "__module_private__ ";
343  }
344  D->getUnderlyingType().print(Out, Policy, D->getName());
345  prettyPrintAttributes(D);
346}
347
348void DeclPrinter::VisitTypeAliasDecl(TypeAliasDecl *D) {
349  Out << "using " << *D << " = " << D->getUnderlyingType().getAsString(Policy);
350}
351
352void DeclPrinter::VisitEnumDecl(EnumDecl *D) {
353  if (!Policy.SuppressSpecifiers && D->isModulePrivate())
354    Out << "__module_private__ ";
355  Out << "enum ";
356  if (D->isScoped()) {
357    if (D->isScopedUsingClassTag())
358      Out << "class ";
359    else
360      Out << "struct ";
361  }
362  Out << *D;
363
364  if (D->isFixed())
365    Out << " : " << D->getIntegerType().stream(Policy);
366
367  if (D->isCompleteDefinition()) {
368    Out << " {\n";
369    VisitDeclContext(D);
370    Indent() << "}";
371  }
372  prettyPrintAttributes(D);
373}
374
375void DeclPrinter::VisitRecordDecl(RecordDecl *D) {
376  if (!Policy.SuppressSpecifiers && D->isModulePrivate())
377    Out << "__module_private__ ";
378  Out << D->getKindName();
379  if (D->getIdentifier())
380    Out << ' ' << *D;
381
382  if (D->isCompleteDefinition()) {
383    Out << " {\n";
384    VisitDeclContext(D);
385    Indent() << "}";
386  }
387}
388
389void DeclPrinter::VisitEnumConstantDecl(EnumConstantDecl *D) {
390  Out << *D;
391  if (Expr *Init = D->getInitExpr()) {
392    Out << " = ";
393    Init->printPretty(Out, 0, Policy, Indentation);
394  }
395}
396
397void DeclPrinter::VisitFunctionDecl(FunctionDecl *D) {
398  if (!Policy.SuppressSpecifiers) {
399    switch (D->getStorageClassAsWritten()) {
400    case SC_None: break;
401    case SC_Extern: Out << "extern "; break;
402    case SC_Static: Out << "static "; break;
403    case SC_PrivateExtern: Out << "__private_extern__ "; break;
404    case SC_Auto: case SC_Register: case SC_OpenCLWorkGroupLocal:
405      llvm_unreachable("invalid for functions");
406    }
407
408    if (D->isInlineSpecified())  Out << "inline ";
409    if (D->isVirtualAsWritten()) Out << "virtual ";
410    if (D->isModulePrivate())    Out << "__module_private__ ";
411  }
412
413  PrintingPolicy SubPolicy(Policy);
414  SubPolicy.SuppressSpecifiers = false;
415  std::string Proto = D->getNameInfo().getAsString();
416
417  QualType Ty = D->getType();
418  while (const ParenType *PT = dyn_cast<ParenType>(Ty)) {
419    Proto = '(' + Proto + ')';
420    Ty = PT->getInnerType();
421  }
422
423  if (isa<FunctionType>(Ty)) {
424    const FunctionType *AFT = Ty->getAs<FunctionType>();
425    const FunctionProtoType *FT = 0;
426    if (D->hasWrittenPrototype())
427      FT = dyn_cast<FunctionProtoType>(AFT);
428
429    Proto += "(";
430    if (FT) {
431      llvm::raw_string_ostream POut(Proto);
432      DeclPrinter ParamPrinter(POut, SubPolicy, Indentation);
433      for (unsigned i = 0, e = D->getNumParams(); i != e; ++i) {
434        if (i) POut << ", ";
435        ParamPrinter.VisitParmVarDecl(D->getParamDecl(i));
436      }
437
438      if (FT->isVariadic()) {
439        if (D->getNumParams()) POut << ", ";
440        POut << "...";
441      }
442    } else if (D->doesThisDeclarationHaveABody() && !D->hasPrototype()) {
443      for (unsigned i = 0, e = D->getNumParams(); i != e; ++i) {
444        if (i)
445          Proto += ", ";
446        Proto += D->getParamDecl(i)->getNameAsString();
447      }
448    }
449
450    Proto += ")";
451
452    if (FT) {
453      if (FT->isConst())
454        Proto += " const";
455      if (FT->isVolatile())
456        Proto += " volatile";
457      if (FT->isRestrict())
458        Proto += " restrict";
459    }
460
461    if (FT && FT->hasDynamicExceptionSpec()) {
462      Proto += " throw(";
463      if (FT->getExceptionSpecType() == EST_MSAny)
464        Proto += "...";
465      else
466        for (unsigned I = 0, N = FT->getNumExceptions(); I != N; ++I) {
467          if (I)
468            Proto += ", ";
469
470          Proto += FT->getExceptionType(I).getAsString(SubPolicy);
471        }
472      Proto += ")";
473    } else if (FT && isNoexceptExceptionSpec(FT->getExceptionSpecType())) {
474      Proto += " noexcept";
475      if (FT->getExceptionSpecType() == EST_ComputedNoexcept) {
476        Proto += "(";
477        llvm::raw_string_ostream EOut(Proto);
478        FT->getNoexceptExpr()->printPretty(EOut, 0, SubPolicy,
479                                           Indentation);
480        EOut.flush();
481        Proto += EOut.str();
482        Proto += ")";
483      }
484    }
485
486    if (CXXConstructorDecl *CDecl = dyn_cast<CXXConstructorDecl>(D)) {
487      bool HasInitializerList = false;
488      for (CXXConstructorDecl::init_const_iterator B = CDecl->init_begin(),
489           E = CDecl->init_end();
490           B != E; ++B) {
491        CXXCtorInitializer * BMInitializer = (*B);
492        if (BMInitializer->isInClassMemberInitializer())
493          continue;
494
495        if (!HasInitializerList) {
496          Proto += " : ";
497          Out << Proto;
498          Proto.clear();
499          HasInitializerList = true;
500        } else
501          Out << ", ";
502
503        if (BMInitializer->isAnyMemberInitializer()) {
504          FieldDecl *FD = BMInitializer->getAnyMember();
505          Out << *FD;
506        } else {
507          Out << QualType(BMInitializer->getBaseClass(), 0).getAsString(Policy);
508        }
509
510        Out << "(";
511        if (!BMInitializer->getInit()) {
512          // Nothing to print
513        } else {
514          Expr *Init = BMInitializer->getInit();
515          if (ExprWithCleanups *Tmp = dyn_cast<ExprWithCleanups>(Init))
516            Init = Tmp->getSubExpr();
517
518          Init = Init->IgnoreParens();
519
520          Expr *SimpleInit = 0;
521          Expr **Args = 0;
522          unsigned NumArgs = 0;
523          if (ParenListExpr *ParenList = dyn_cast<ParenListExpr>(Init)) {
524            Args = ParenList->getExprs();
525            NumArgs = ParenList->getNumExprs();
526          } else if (CXXConstructExpr *Construct
527                                        = dyn_cast<CXXConstructExpr>(Init)) {
528            Args = Construct->getArgs();
529            NumArgs = Construct->getNumArgs();
530          } else
531            SimpleInit = Init;
532
533          if (SimpleInit)
534            SimpleInit->printPretty(Out, 0, Policy, Indentation);
535          else {
536            for (unsigned I = 0; I != NumArgs; ++I) {
537              if (isa<CXXDefaultArgExpr>(Args[I]))
538                break;
539
540              if (I)
541                Out << ", ";
542              Args[I]->printPretty(Out, 0, Policy, Indentation);
543            }
544          }
545        }
546        Out << ")";
547      }
548    }
549    else
550      AFT->getResultType().print(Out, Policy, Proto);
551  } else {
552    Ty.print(Out, Policy, Proto);
553  }
554
555  prettyPrintAttributes(D);
556
557  if (D->isPure())
558    Out << " = 0";
559  else if (D->isDeletedAsWritten())
560    Out << " = delete";
561  else if (D->doesThisDeclarationHaveABody() && !Policy.TerseOutput) {
562    if (!D->hasPrototype() && D->getNumParams()) {
563      // This is a K&R function definition, so we need to print the
564      // parameters.
565      Out << '\n';
566      DeclPrinter ParamPrinter(Out, SubPolicy, Indentation);
567      Indentation += Policy.Indentation;
568      for (unsigned i = 0, e = D->getNumParams(); i != e; ++i) {
569        Indent();
570        ParamPrinter.VisitParmVarDecl(D->getParamDecl(i));
571        Out << ";\n";
572      }
573      Indentation -= Policy.Indentation;
574    } else
575      Out << ' ';
576
577    D->getBody()->printPretty(Out, 0, SubPolicy, Indentation);
578    Out << '\n';
579  }
580}
581
582void DeclPrinter::VisitFieldDecl(FieldDecl *D) {
583  if (!Policy.SuppressSpecifiers && D->isMutable())
584    Out << "mutable ";
585  if (!Policy.SuppressSpecifiers && D->isModulePrivate())
586    Out << "__module_private__ ";
587
588  Out << D->getType().stream(Policy, D->getName());
589
590  if (D->isBitField()) {
591    Out << " : ";
592    D->getBitWidth()->printPretty(Out, 0, Policy, Indentation);
593  }
594
595  Expr *Init = D->getInClassInitializer();
596  if (!Policy.SuppressInitializers && Init) {
597    if (D->getInClassInitStyle() == ICIS_ListInit)
598      Out << " ";
599    else
600      Out << " = ";
601    Init->printPretty(Out, 0, Policy, Indentation);
602  }
603  prettyPrintAttributes(D);
604}
605
606void DeclPrinter::VisitLabelDecl(LabelDecl *D) {
607  Out << *D << ":";
608}
609
610
611void DeclPrinter::VisitVarDecl(VarDecl *D) {
612  StorageClass SCAsWritten = D->getStorageClassAsWritten();
613  if (!Policy.SuppressSpecifiers && SCAsWritten != SC_None)
614    Out << VarDecl::getStorageClassSpecifierString(SCAsWritten) << " ";
615
616  if (!Policy.SuppressSpecifiers && D->isThreadSpecified())
617    Out << "__thread ";
618  if (!Policy.SuppressSpecifiers && D->isModulePrivate())
619    Out << "__module_private__ ";
620
621  QualType T = D->getType();
622  if (ParmVarDecl *Parm = dyn_cast<ParmVarDecl>(D))
623    T = Parm->getOriginalType();
624  T.print(Out, Policy, D->getName());
625  Expr *Init = D->getInit();
626  if (!Policy.SuppressInitializers && Init) {
627    bool ImplicitInit = false;
628    if (CXXConstructExpr *Construct = dyn_cast<CXXConstructExpr>(Init))
629      ImplicitInit = D->getInitStyle() == VarDecl::CallInit &&
630          Construct->getNumArgs() == 0 && !Construct->isListInitialization();
631    if (!ImplicitInit) {
632      if (D->getInitStyle() == VarDecl::CallInit)
633        Out << "(";
634      else if (D->getInitStyle() == VarDecl::CInit) {
635        Out << " = ";
636      }
637      Init->printPretty(Out, 0, Policy, Indentation);
638      if (D->getInitStyle() == VarDecl::CallInit)
639        Out << ")";
640    }
641  }
642  prettyPrintAttributes(D);
643}
644
645void DeclPrinter::VisitParmVarDecl(ParmVarDecl *D) {
646  VisitVarDecl(D);
647}
648
649void DeclPrinter::VisitFileScopeAsmDecl(FileScopeAsmDecl *D) {
650  Out << "__asm (";
651  D->getAsmString()->printPretty(Out, 0, Policy, Indentation);
652  Out << ")";
653}
654
655void DeclPrinter::VisitImportDecl(ImportDecl *D) {
656  Out << "@__experimental_modules_import " << D->getImportedModule()->getFullModuleName()
657      << ";\n";
658}
659
660void DeclPrinter::VisitStaticAssertDecl(StaticAssertDecl *D) {
661  Out << "static_assert(";
662  D->getAssertExpr()->printPretty(Out, 0, Policy, Indentation);
663  Out << ", ";
664  D->getMessage()->printPretty(Out, 0, Policy, Indentation);
665  Out << ")";
666}
667
668//----------------------------------------------------------------------------
669// C++ declarations
670//----------------------------------------------------------------------------
671void DeclPrinter::VisitNamespaceDecl(NamespaceDecl *D) {
672  if (D->isInline())
673    Out << "inline ";
674  Out << "namespace " << *D << " {\n";
675  VisitDeclContext(D);
676  Indent() << "}";
677}
678
679void DeclPrinter::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
680  Out << "using namespace ";
681  if (D->getQualifier())
682    D->getQualifier()->print(Out, Policy);
683  Out << *D->getNominatedNamespaceAsWritten();
684}
685
686void DeclPrinter::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
687  Out << "namespace " << *D << " = ";
688  if (D->getQualifier())
689    D->getQualifier()->print(Out, Policy);
690  Out << *D->getAliasedNamespace();
691}
692
693void DeclPrinter::VisitCXXRecordDecl(CXXRecordDecl *D) {
694  if (!Policy.SuppressSpecifiers && D->isModulePrivate())
695    Out << "__module_private__ ";
696  Out << D->getKindName();
697  if (D->getIdentifier())
698    Out << ' ' << *D;
699
700  if (D->isCompleteDefinition()) {
701    // Print the base classes
702    if (D->getNumBases()) {
703      Out << " : ";
704      for (CXXRecordDecl::base_class_iterator Base = D->bases_begin(),
705             BaseEnd = D->bases_end(); Base != BaseEnd; ++Base) {
706        if (Base != D->bases_begin())
707          Out << ", ";
708
709        if (Base->isVirtual())
710          Out << "virtual ";
711
712        AccessSpecifier AS = Base->getAccessSpecifierAsWritten();
713        if (AS != AS_none)
714          Print(AS);
715        Out << " " << Base->getType().getAsString(Policy);
716
717        if (Base->isPackExpansion())
718          Out << "...";
719      }
720    }
721
722    // Print the class definition
723    // FIXME: Doesn't print access specifiers, e.g., "public:"
724    Out << " {\n";
725    VisitDeclContext(D);
726    Indent() << "}";
727  }
728}
729
730void DeclPrinter::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
731  const char *l;
732  if (D->getLanguage() == LinkageSpecDecl::lang_c)
733    l = "C";
734  else {
735    assert(D->getLanguage() == LinkageSpecDecl::lang_cxx &&
736           "unknown language in linkage specification");
737    l = "C++";
738  }
739
740  Out << "extern \"" << l << "\" ";
741  if (D->hasBraces()) {
742    Out << "{\n";
743    VisitDeclContext(D);
744    Indent() << "}";
745  } else
746    Visit(*D->decls_begin());
747}
748
749void DeclPrinter::PrintTemplateParameters(
750    const TemplateParameterList *Params, const TemplateArgumentList *Args = 0) {
751  assert(Params);
752  assert(!Args || Params->size() == Args->size());
753
754  Out << "template <";
755
756  for (unsigned i = 0, e = Params->size(); i != e; ++i) {
757    if (i != 0)
758      Out << ", ";
759
760    const Decl *Param = Params->getParam(i);
761    if (const TemplateTypeParmDecl *TTP =
762          dyn_cast<TemplateTypeParmDecl>(Param)) {
763
764      if (TTP->wasDeclaredWithTypename())
765        Out << "typename ";
766      else
767        Out << "class ";
768
769      if (TTP->isParameterPack())
770        Out << "... ";
771
772      Out << *TTP;
773
774      if (Args) {
775        Out << " = ";
776        Args->get(i).print(Policy, Out);
777      } else if (TTP->hasDefaultArgument()) {
778        Out << " = ";
779        Out << TTP->getDefaultArgument().getAsString(Policy);
780      };
781    } else if (const NonTypeTemplateParmDecl *NTTP =
782                 dyn_cast<NonTypeTemplateParmDecl>(Param)) {
783      Out << NTTP->getType().getAsString(Policy);
784
785      if (NTTP->isParameterPack() && !isa<PackExpansionType>(NTTP->getType()))
786        Out << "...";
787
788      if (IdentifierInfo *Name = NTTP->getIdentifier()) {
789        Out << ' ';
790        Out << Name->getName();
791      }
792
793      if (Args) {
794        Out << " = ";
795        Args->get(i).print(Policy, Out);
796      } else if (NTTP->hasDefaultArgument()) {
797        Out << " = ";
798        NTTP->getDefaultArgument()->printPretty(Out, 0, Policy, Indentation);
799      }
800    } else if (const TemplateTemplateParmDecl *TTPD =
801                 dyn_cast<TemplateTemplateParmDecl>(Param)) {
802      VisitTemplateDecl(TTPD);
803      // FIXME: print the default argument, if present.
804    }
805  }
806
807  Out << "> ";
808}
809
810void DeclPrinter::VisitTemplateDecl(const TemplateDecl *D) {
811  PrintTemplateParameters(D->getTemplateParameters());
812
813  if (const TemplateTemplateParmDecl *TTP =
814        dyn_cast<TemplateTemplateParmDecl>(D)) {
815    Out << "class ";
816    if (TTP->isParameterPack())
817      Out << "...";
818    Out << D->getName();
819  } else {
820    Visit(D->getTemplatedDecl());
821  }
822}
823
824void DeclPrinter::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
825  if (PrintInstantiation) {
826    TemplateParameterList *Params = D->getTemplateParameters();
827    for (FunctionTemplateDecl::spec_iterator I = D->spec_begin(), E = D->spec_end();
828         I != E; ++I) {
829      PrintTemplateParameters(Params, (*I)->getTemplateSpecializationArgs());
830      Visit(*I);
831    }
832  }
833
834  return VisitRedeclarableTemplateDecl(D);
835}
836
837void DeclPrinter::VisitClassTemplateDecl(ClassTemplateDecl *D) {
838  if (PrintInstantiation) {
839    TemplateParameterList *Params = D->getTemplateParameters();
840    for (ClassTemplateDecl::spec_iterator I = D->spec_begin(), E = D->spec_end();
841         I != E; ++I) {
842      PrintTemplateParameters(Params, &(*I)->getTemplateArgs());
843      Visit(*I);
844      Out << '\n';
845    }
846  }
847
848  return VisitRedeclarableTemplateDecl(D);
849}
850
851//----------------------------------------------------------------------------
852// Objective-C declarations
853//----------------------------------------------------------------------------
854
855void DeclPrinter::VisitObjCMethodDecl(ObjCMethodDecl *OMD) {
856  if (OMD->isInstanceMethod())
857    Out << "- ";
858  else
859    Out << "+ ";
860  if (!OMD->getResultType().isNull())
861    Out << '(' << OMD->getResultType().getAsString(Policy) << ")";
862
863  std::string name = OMD->getSelector().getAsString();
864  std::string::size_type pos, lastPos = 0;
865  for (ObjCMethodDecl::param_iterator PI = OMD->param_begin(),
866       E = OMD->param_end(); PI != E; ++PI) {
867    // FIXME: selector is missing here!
868    pos = name.find_first_of(':', lastPos);
869    Out << " " << name.substr(lastPos, pos - lastPos);
870    Out << ":(" << (*PI)->getType().getAsString(Policy) << ')' << **PI;
871    lastPos = pos + 1;
872  }
873
874  if (OMD->param_begin() == OMD->param_end())
875    Out << " " << name;
876
877  if (OMD->isVariadic())
878      Out << ", ...";
879
880  if (OMD->getBody() && !Policy.TerseOutput) {
881    Out << ' ';
882    OMD->getBody()->printPretty(Out, 0, Policy);
883    Out << '\n';
884  }
885}
886
887void DeclPrinter::VisitObjCImplementationDecl(ObjCImplementationDecl *OID) {
888  std::string I = OID->getNameAsString();
889  ObjCInterfaceDecl *SID = OID->getSuperClass();
890
891  if (SID)
892    Out << "@implementation " << I << " : " << *SID;
893  else
894    Out << "@implementation " << I;
895  Out << "\n";
896  VisitDeclContext(OID, false);
897  Out << "@end";
898}
899
900void DeclPrinter::VisitObjCInterfaceDecl(ObjCInterfaceDecl *OID) {
901  std::string I = OID->getNameAsString();
902  ObjCInterfaceDecl *SID = OID->getSuperClass();
903
904  if (!OID->isThisDeclarationADefinition()) {
905    Out << "@class " << I << ";";
906    return;
907  }
908
909  if (SID)
910    Out << "@interface " << I << " : " << *SID;
911  else
912    Out << "@interface " << I;
913
914  // Protocols?
915  const ObjCList<ObjCProtocolDecl> &Protocols = OID->getReferencedProtocols();
916  if (!Protocols.empty()) {
917    for (ObjCList<ObjCProtocolDecl>::iterator I = Protocols.begin(),
918         E = Protocols.end(); I != E; ++I)
919      Out << (I == Protocols.begin() ? '<' : ',') << **I;
920  }
921
922  if (!Protocols.empty())
923    Out << "> ";
924
925  if (OID->ivar_size() > 0) {
926    Out << "{\n";
927    Indentation += Policy.Indentation;
928    for (ObjCInterfaceDecl::ivar_iterator I = OID->ivar_begin(),
929         E = OID->ivar_end(); I != E; ++I) {
930      Indent() << I->getType().getAsString(Policy) << ' ' << **I << ";\n";
931    }
932    Indentation -= Policy.Indentation;
933    Out << "}\n";
934  }
935
936  VisitDeclContext(OID, false);
937  Out << "@end";
938  // FIXME: implement the rest...
939}
940
941void DeclPrinter::VisitObjCProtocolDecl(ObjCProtocolDecl *PID) {
942  if (!PID->isThisDeclarationADefinition()) {
943    Out << "@protocol " << PID->getIdentifier() << ";\n";
944    return;
945  }
946
947  Out << "@protocol " << *PID << '\n';
948  VisitDeclContext(PID, false);
949  Out << "@end";
950}
951
952void DeclPrinter::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *PID) {
953  Out << "@implementation " << *PID->getClassInterface() << '(' << *PID <<")\n";
954
955  VisitDeclContext(PID, false);
956  Out << "@end";
957  // FIXME: implement the rest...
958}
959
960void DeclPrinter::VisitObjCCategoryDecl(ObjCCategoryDecl *PID) {
961  Out << "@interface " << *PID->getClassInterface() << '(' << *PID << ")\n";
962  VisitDeclContext(PID, false);
963  Out << "@end";
964
965  // FIXME: implement the rest...
966}
967
968void DeclPrinter::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *AID) {
969  Out << "@compatibility_alias " << *AID
970      << ' ' << *AID->getClassInterface() << ";\n";
971}
972
973/// PrintObjCPropertyDecl - print a property declaration.
974///
975void DeclPrinter::VisitObjCPropertyDecl(ObjCPropertyDecl *PDecl) {
976  if (PDecl->getPropertyImplementation() == ObjCPropertyDecl::Required)
977    Out << "@required\n";
978  else if (PDecl->getPropertyImplementation() == ObjCPropertyDecl::Optional)
979    Out << "@optional\n";
980
981  Out << "@property";
982  if (PDecl->getPropertyAttributes() != ObjCPropertyDecl::OBJC_PR_noattr) {
983    bool first = true;
984    Out << " (";
985    if (PDecl->getPropertyAttributes() &
986        ObjCPropertyDecl::OBJC_PR_readonly) {
987      Out << (first ? ' ' : ',') << "readonly";
988      first = false;
989    }
990
991    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) {
992      Out << (first ? ' ' : ',') << "getter = "
993          << PDecl->getGetterName().getAsString();
994      first = false;
995    }
996    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) {
997      Out << (first ? ' ' : ',') << "setter = "
998          << PDecl->getSetterName().getAsString();
999      first = false;
1000    }
1001
1002    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_assign) {
1003      Out << (first ? ' ' : ',') << "assign";
1004      first = false;
1005    }
1006
1007    if (PDecl->getPropertyAttributes() &
1008        ObjCPropertyDecl::OBJC_PR_readwrite) {
1009      Out << (first ? ' ' : ',') << "readwrite";
1010      first = false;
1011    }
1012
1013    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_retain) {
1014      Out << (first ? ' ' : ',') << "retain";
1015      first = false;
1016    }
1017
1018    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_strong) {
1019      Out << (first ? ' ' : ',') << "strong";
1020      first = false;
1021    }
1022
1023    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_copy) {
1024      Out << (first ? ' ' : ',') << "copy";
1025      first = false;
1026    }
1027
1028    if (PDecl->getPropertyAttributes() &
1029        ObjCPropertyDecl::OBJC_PR_nonatomic) {
1030      Out << (first ? ' ' : ',') << "nonatomic";
1031      first = false;
1032    }
1033    if (PDecl->getPropertyAttributes() &
1034        ObjCPropertyDecl::OBJC_PR_atomic) {
1035      Out << (first ? ' ' : ',') << "atomic";
1036      first = false;
1037    }
1038
1039    (void) first; // Silence dead store warning due to idiomatic code.
1040    Out << " )";
1041  }
1042  Out << ' ' << PDecl->getType().getAsString(Policy) << ' ' << *PDecl;
1043}
1044
1045void DeclPrinter::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *PID) {
1046  if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize)
1047    Out << "@synthesize ";
1048  else
1049    Out << "@dynamic ";
1050  Out << *PID->getPropertyDecl();
1051  if (PID->getPropertyIvarDecl())
1052    Out << '=' << *PID->getPropertyIvarDecl();
1053}
1054
1055void DeclPrinter::VisitUsingDecl(UsingDecl *D) {
1056  Out << "using ";
1057  D->getQualifier()->print(Out, Policy);
1058  Out << *D;
1059}
1060
1061void
1062DeclPrinter::VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D) {
1063  Out << "using typename ";
1064  D->getQualifier()->print(Out, Policy);
1065  Out << D->getDeclName();
1066}
1067
1068void DeclPrinter::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
1069  Out << "using ";
1070  D->getQualifier()->print(Out, Policy);
1071  Out << D->getDeclName();
1072}
1073
1074void DeclPrinter::VisitUsingShadowDecl(UsingShadowDecl *D) {
1075  // ignore
1076}
1077