DeclPrinter.cpp revision a88cefd266c428be33cc06f7e8b00ff8fc97c1ff 
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 "llvm/Support/raw_ostream.h"
23using namespace clang;
24
25namespace {
26  class DeclPrinter : public DeclVisitor<DeclPrinter> {
27    llvm::raw_ostream &Out;
28    ASTContext &Context;
29    PrintingPolicy Policy;
30    unsigned Indentation;
31
32    llvm::raw_ostream& Indent() { return Indent(Indentation); }
33    llvm::raw_ostream& Indent(unsigned Indentation);
34    void ProcessDeclGroup(llvm::SmallVectorImpl<Decl*>& Decls);
35
36    void Print(AccessSpecifier AS);
37
38  public:
39    DeclPrinter(llvm::raw_ostream &Out, ASTContext &Context,
40                const PrintingPolicy &Policy,
41                unsigned Indentation = 0)
42      : Out(Out), Context(Context), Policy(Policy), Indentation(Indentation) { }
43
44    void VisitDeclContext(DeclContext *DC, bool Indent = true);
45
46    void VisitTranslationUnitDecl(TranslationUnitDecl *D);
47    void VisitTypedefDecl(TypedefDecl *D);
48    void VisitEnumDecl(EnumDecl *D);
49    void VisitRecordDecl(RecordDecl *D);
50    void VisitEnumConstantDecl(EnumConstantDecl *D);
51    void VisitFunctionDecl(FunctionDecl *D);
52    void VisitFieldDecl(FieldDecl *D);
53    void VisitVarDecl(VarDecl *D);
54    void VisitParmVarDecl(ParmVarDecl *D);
55    void VisitFileScopeAsmDecl(FileScopeAsmDecl *D);
56    void VisitNamespaceDecl(NamespaceDecl *D);
57    void VisitUsingDirectiveDecl(UsingDirectiveDecl *D);
58    void VisitNamespaceAliasDecl(NamespaceAliasDecl *D);
59    void VisitCXXRecordDecl(CXXRecordDecl *D);
60    void VisitLinkageSpecDecl(LinkageSpecDecl *D);
61    void VisitTemplateDecl(TemplateDecl *D);
62    void VisitObjCMethodDecl(ObjCMethodDecl *D);
63    void VisitObjCClassDecl(ObjCClassDecl *D);
64    void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
65    void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
66    void VisitObjCForwardProtocolDecl(ObjCForwardProtocolDecl *D);
67    void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
68    void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
69    void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
70    void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
71    void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
72    void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
73    void VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D);
74    void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D);
75    void VisitUsingDecl(UsingDecl *D);
76    void VisitUsingShadowDecl(UsingShadowDecl *D);
77  };
78}
79
80void Decl::print(llvm::raw_ostream &Out, unsigned Indentation) const {
81  print(Out, getASTContext().PrintingPolicy, Indentation);
82}
83
84void Decl::print(llvm::raw_ostream &Out, const PrintingPolicy &Policy,
85                 unsigned Indentation) const {
86  DeclPrinter Printer(Out, getASTContext(), Policy, Indentation);
87  Printer.Visit(const_cast<Decl*>(this));
88}
89
90static QualType GetBaseType(QualType T) {
91  // FIXME: This should be on the Type class!
92  QualType BaseType = T;
93  while (!BaseType->isSpecifierType()) {
94    if (isa<TypedefType>(BaseType))
95      break;
96    else if (const PointerType* PTy = BaseType->getAs<PointerType>())
97      BaseType = PTy->getPointeeType();
98    else if (const ArrayType* ATy = dyn_cast<ArrayType>(BaseType))
99      BaseType = ATy->getElementType();
100    else if (const FunctionType* FTy = BaseType->getAs<FunctionType>())
101      BaseType = FTy->getResultType();
102    else if (const VectorType *VTy = BaseType->getAs<VectorType>())
103      BaseType = VTy->getElementType();
104    else
105      assert(0 && "Unknown declarator!");
106  }
107  return BaseType;
108}
109
110static QualType getDeclType(Decl* D) {
111  if (TypedefDecl* TDD = dyn_cast<TypedefDecl>(D))
112    return TDD->getUnderlyingType();
113  if (ValueDecl* VD = dyn_cast<ValueDecl>(D))
114    return VD->getType();
115  return QualType();
116}
117
118void Decl::printGroup(Decl** Begin, unsigned NumDecls,
119                      llvm::raw_ostream &Out, const PrintingPolicy &Policy,
120                      unsigned Indentation) {
121  if (NumDecls == 1) {
122    (*Begin)->print(Out, Policy, Indentation);
123    return;
124  }
125
126  Decl** End = Begin + NumDecls;
127  TagDecl* TD = dyn_cast<TagDecl>(*Begin);
128  if (TD)
129    ++Begin;
130
131  PrintingPolicy SubPolicy(Policy);
132  if (TD && TD->isDefinition()) {
133    TD->print(Out, Policy, Indentation);
134    Out << " ";
135    SubPolicy.SuppressTag = true;
136  }
137
138  bool isFirst = true;
139  for ( ; Begin != End; ++Begin) {
140    if (isFirst) {
141      SubPolicy.SuppressSpecifiers = false;
142      isFirst = false;
143    } else {
144      if (!isFirst) Out << ", ";
145      SubPolicy.SuppressSpecifiers = true;
146    }
147
148    (*Begin)->print(Out, SubPolicy, Indentation);
149  }
150}
151
152void DeclContext::dumpDeclContext() const {
153  // Get the translation unit
154  const DeclContext *DC = this;
155  while (!DC->isTranslationUnit())
156    DC = DC->getParent();
157
158  ASTContext &Ctx = cast<TranslationUnitDecl>(DC)->getASTContext();
159  DeclPrinter Printer(llvm::errs(), Ctx, Ctx.PrintingPolicy, 0);
160  Printer.VisitDeclContext(const_cast<DeclContext *>(this), /*Indent=*/false);
161}
162
163void Decl::dump() const {
164  print(llvm::errs());
165}
166
167llvm::raw_ostream& DeclPrinter::Indent(unsigned Indentation) {
168  for (unsigned i = 0; i != Indentation; ++i)
169    Out << "  ";
170  return Out;
171}
172
173void DeclPrinter::ProcessDeclGroup(llvm::SmallVectorImpl<Decl*>& Decls) {
174  this->Indent();
175  Decl::printGroup(Decls.data(), Decls.size(), Out, Policy, Indentation);
176  Out << ";\n";
177  Decls.clear();
178
179}
180
181void DeclPrinter::Print(AccessSpecifier AS) {
182  switch(AS) {
183  case AS_none:      assert(0 && "No access specifier!"); break;
184  case AS_public:    Out << "public"; break;
185  case AS_protected: Out << "protected"; break;
186  case AS_private:   Out << "private"; break;
187  }
188}
189
190//----------------------------------------------------------------------------
191// Common C declarations
192//----------------------------------------------------------------------------
193
194void DeclPrinter::VisitDeclContext(DeclContext *DC, bool Indent) {
195  if (Indent)
196    Indentation += Policy.Indentation;
197
198  llvm::SmallVector<Decl*, 2> Decls;
199  for (DeclContext::decl_iterator D = DC->decls_begin(), DEnd = DC->decls_end();
200       D != DEnd; ++D) {
201
202    // Don't print ObjCIvarDecls, as they are printed when visiting the
203    // containing ObjCInterfaceDecl.
204    if (isa<ObjCIvarDecl>(*D))
205      continue;
206
207    if (!Policy.Dump) {
208      // Skip over implicit declarations in pretty-printing mode.
209      if (D->isImplicit()) continue;
210      // FIXME: Ugly hack so we don't pretty-print the builtin declaration
211      // of __builtin_va_list or __[u]int128_t.  There should be some other way
212      // to check that.
213      if (NamedDecl *ND = dyn_cast<NamedDecl>(*D)) {
214        if (IdentifierInfo *II = ND->getIdentifier()) {
215          if (II->isStr("__builtin_va_list") ||
216              II->isStr("__int128_t") || II->isStr("__uint128_t"))
217            continue;
218        }
219      }
220    }
221
222    // The next bits of code handles stuff like "struct {int x;} a,b"; we're
223    // forced to merge the declarations because there's no other way to
224    // refer to the struct in question.  This limited merging is safe without
225    // a bunch of other checks because it only merges declarations directly
226    // referring to the tag, not typedefs.
227    //
228    // Check whether the current declaration should be grouped with a previous
229    // unnamed struct.
230    QualType CurDeclType = getDeclType(*D);
231    if (!Decls.empty() && !CurDeclType.isNull()) {
232      QualType BaseType = GetBaseType(CurDeclType);
233      if (!BaseType.isNull() && isa<TagType>(BaseType) &&
234          cast<TagType>(BaseType)->getDecl() == Decls[0]) {
235        Decls.push_back(*D);
236        continue;
237      }
238    }
239
240    // If we have a merged group waiting to be handled, handle it now.
241    if (!Decls.empty())
242      ProcessDeclGroup(Decls);
243
244    // If the current declaration is an unnamed tag type, save it
245    // so we can merge it with the subsequent declaration(s) using it.
246    if (isa<TagDecl>(*D) && !cast<TagDecl>(*D)->getIdentifier()) {
247      Decls.push_back(*D);
248      continue;
249    }
250
251    if (isa<AccessSpecDecl>(*D)) {
252      Indentation -= Policy.Indentation;
253      this->Indent();
254      Print(D->getAccess());
255      Out << ":\n";
256      Indentation += Policy.Indentation;
257      continue;
258    }
259
260    this->Indent();
261    Visit(*D);
262
263    // FIXME: Need to be able to tell the DeclPrinter when
264    const char *Terminator = 0;
265    if (isa<FunctionDecl>(*D) &&
266        cast<FunctionDecl>(*D)->isThisDeclarationADefinition())
267      Terminator = 0;
268    else if (isa<ObjCMethodDecl>(*D) && cast<ObjCMethodDecl>(*D)->getBody())
269      Terminator = 0;
270    else if (isa<NamespaceDecl>(*D) || isa<LinkageSpecDecl>(*D) ||
271             isa<ObjCImplementationDecl>(*D) ||
272             isa<ObjCInterfaceDecl>(*D) ||
273             isa<ObjCProtocolDecl>(*D) ||
274             isa<ObjCCategoryImplDecl>(*D) ||
275             isa<ObjCCategoryDecl>(*D))
276      Terminator = 0;
277    else if (isa<EnumConstantDecl>(*D)) {
278      DeclContext::decl_iterator Next = D;
279      ++Next;
280      if (Next != DEnd)
281        Terminator = ",";
282    } else
283      Terminator = ";";
284
285    if (Terminator)
286      Out << Terminator;
287    Out << "\n";
288  }
289
290  if (!Decls.empty())
291    ProcessDeclGroup(Decls);
292
293  if (Indent)
294    Indentation -= Policy.Indentation;
295}
296
297void DeclPrinter::VisitTranslationUnitDecl(TranslationUnitDecl *D) {
298  VisitDeclContext(D, false);
299}
300
301void DeclPrinter::VisitTypedefDecl(TypedefDecl *D) {
302  std::string S = D->getNameAsString();
303  D->getUnderlyingType().getAsStringInternal(S, Policy);
304  if (!Policy.SuppressSpecifiers)
305    Out << "typedef ";
306  Out << S;
307}
308
309void DeclPrinter::VisitEnumDecl(EnumDecl *D) {
310  Out << "enum ";
311  if (D->isScoped()) {
312    if (D->isScopedUsingClassTag())
313      Out << "class ";
314    else
315      Out << "struct ";
316  }
317  Out << D;
318
319  if (D->isFixed()) {
320    std::string Underlying;
321    D->getIntegerType().getAsStringInternal(Underlying, Policy);
322    Out << " : " << Underlying;
323  }
324
325  if (D->isDefinition()) {
326    Out << " {\n";
327    VisitDeclContext(D);
328    Indent() << "}";
329  }
330}
331
332void DeclPrinter::VisitRecordDecl(RecordDecl *D) {
333  Out << D->getKindName();
334  if (D->getIdentifier())
335    Out << ' ' << D;
336
337  if (D->isDefinition()) {
338    Out << " {\n";
339    VisitDeclContext(D);
340    Indent() << "}";
341  }
342}
343
344void DeclPrinter::VisitEnumConstantDecl(EnumConstantDecl *D) {
345  Out << D;
346  if (Expr *Init = D->getInitExpr()) {
347    Out << " = ";
348    Init->printPretty(Out, Context, 0, Policy, Indentation);
349  }
350}
351
352void DeclPrinter::VisitFunctionDecl(FunctionDecl *D) {
353  if (!Policy.SuppressSpecifiers) {
354    switch (D->getStorageClass()) {
355    case SC_None: break;
356    case SC_Extern: Out << "extern "; break;
357    case SC_Static: Out << "static "; break;
358    case SC_PrivateExtern: Out << "__private_extern__ "; break;
359    case SC_Auto: case SC_Register: llvm_unreachable("invalid for functions");
360    }
361
362    if (D->isInlineSpecified())           Out << "inline ";
363    if (D->isVirtualAsWritten()) Out << "virtual ";
364  }
365
366  PrintingPolicy SubPolicy(Policy);
367  SubPolicy.SuppressSpecifiers = false;
368  std::string Proto = D->getNameInfo().getAsString();
369  if (isa<FunctionType>(D->getType().getTypePtr())) {
370    const FunctionType *AFT = D->getType()->getAs<FunctionType>();
371
372    const FunctionProtoType *FT = 0;
373    if (D->hasWrittenPrototype())
374      FT = dyn_cast<FunctionProtoType>(AFT);
375
376    Proto += "(";
377    if (FT) {
378      llvm::raw_string_ostream POut(Proto);
379      DeclPrinter ParamPrinter(POut, Context, SubPolicy, Indentation);
380      for (unsigned i = 0, e = D->getNumParams(); i != e; ++i) {
381        if (i) POut << ", ";
382        ParamPrinter.VisitParmVarDecl(D->getParamDecl(i));
383      }
384
385      if (FT->isVariadic()) {
386        if (D->getNumParams()) POut << ", ";
387        POut << "...";
388      }
389    } else if (D->isThisDeclarationADefinition() && !D->hasPrototype()) {
390      for (unsigned i = 0, e = D->getNumParams(); i != e; ++i) {
391        if (i)
392          Proto += ", ";
393        Proto += D->getParamDecl(i)->getNameAsString();
394      }
395    }
396
397    Proto += ")";
398
399    if (FT && FT->getTypeQuals()) {
400      unsigned TypeQuals = FT->getTypeQuals();
401      if (TypeQuals & Qualifiers::Const)
402        Proto += " const";
403      if (TypeQuals & Qualifiers::Volatile)
404        Proto += " volatile";
405      if (TypeQuals & Qualifiers::Restrict)
406        Proto += " restrict";
407    }
408
409    if (FT && FT->hasExceptionSpec()) {
410      Proto += " throw(";
411      if (FT->hasAnyExceptionSpec())
412        Proto += "...";
413      else
414        for (unsigned I = 0, N = FT->getNumExceptions(); I != N; ++I) {
415          if (I)
416            Proto += ", ";
417
418
419          std::string ExceptionType;
420          FT->getExceptionType(I).getAsStringInternal(ExceptionType, SubPolicy);
421          Proto += ExceptionType;
422        }
423      Proto += ")";
424    }
425
426    if (D->hasAttr<NoReturnAttr>())
427      Proto += " __attribute((noreturn))";
428    if (CXXConstructorDecl *CDecl = dyn_cast<CXXConstructorDecl>(D)) {
429      if (CDecl->getNumBaseOrMemberInitializers() > 0) {
430        Proto += " : ";
431        Out << Proto;
432        Proto.clear();
433        for (CXXConstructorDecl::init_const_iterator B = CDecl->init_begin(),
434             E = CDecl->init_end();
435             B != E; ++B) {
436          CXXBaseOrMemberInitializer * BMInitializer = (*B);
437          if (B != CDecl->init_begin())
438            Out << ", ";
439          if (BMInitializer->isMemberInitializer()) {
440            FieldDecl *FD = BMInitializer->getMember();
441            Out << FD;
442          } else {
443            Out << QualType(BMInitializer->getBaseClass(),
444                            0).getAsString(Policy);
445          }
446
447          Out << "(";
448          if (!BMInitializer->getInit()) {
449            // Nothing to print
450          } else {
451            Expr *Init = BMInitializer->getInit();
452            if (CXXExprWithTemporaries *Tmp
453                  = dyn_cast<CXXExprWithTemporaries>(Init))
454              Init = Tmp->getSubExpr();
455
456            Init = Init->IgnoreParens();
457
458            Expr *SimpleInit = 0;
459            Expr **Args = 0;
460            unsigned NumArgs = 0;
461            if (ParenListExpr *ParenList = dyn_cast<ParenListExpr>(Init)) {
462              Args = ParenList->getExprs();
463              NumArgs = ParenList->getNumExprs();
464            } else if (CXXConstructExpr *Construct
465                                          = dyn_cast<CXXConstructExpr>(Init)) {
466              Args = Construct->getArgs();
467              NumArgs = Construct->getNumArgs();
468            } else
469              SimpleInit = Init;
470
471            if (SimpleInit)
472              SimpleInit->printPretty(Out, Context, 0, Policy, Indentation);
473            else {
474              for (unsigned I = 0; I != NumArgs; ++I) {
475                if (isa<CXXDefaultArgExpr>(Args[I]))
476                  break;
477
478                if (I)
479                  Out << ", ";
480                Args[I]->printPretty(Out, Context, 0, Policy, Indentation);
481              }
482            }
483          }
484          Out << ")";
485        }
486      }
487    }
488    else
489      AFT->getResultType().getAsStringInternal(Proto, Policy);
490  } else {
491    D->getType().getAsStringInternal(Proto, Policy);
492  }
493
494  Out << Proto;
495
496  if (D->isPure())
497    Out << " = 0";
498  else if (D->isDeleted())
499    Out << " = delete";
500  else if (D->isThisDeclarationADefinition()) {
501    if (!D->hasPrototype() && D->getNumParams()) {
502      // This is a K&R function definition, so we need to print the
503      // parameters.
504      Out << '\n';
505      DeclPrinter ParamPrinter(Out, Context, SubPolicy, Indentation);
506      Indentation += Policy.Indentation;
507      for (unsigned i = 0, e = D->getNumParams(); i != e; ++i) {
508        Indent();
509        ParamPrinter.VisitParmVarDecl(D->getParamDecl(i));
510        Out << ";\n";
511      }
512      Indentation -= Policy.Indentation;
513    } else
514      Out << ' ';
515
516    D->getBody()->printPretty(Out, Context, 0, SubPolicy, Indentation);
517    Out << '\n';
518  }
519}
520
521void DeclPrinter::VisitFieldDecl(FieldDecl *D) {
522  if (!Policy.SuppressSpecifiers && D->isMutable())
523    Out << "mutable ";
524
525  std::string Name = D->getNameAsString();
526  D->getType().getAsStringInternal(Name, Policy);
527  Out << Name;
528
529  if (D->isBitField()) {
530    Out << " : ";
531    D->getBitWidth()->printPretty(Out, Context, 0, Policy, Indentation);
532  }
533}
534
535void DeclPrinter::VisitVarDecl(VarDecl *D) {
536  if (!Policy.SuppressSpecifiers && D->getStorageClass() != SC_None)
537    Out << VarDecl::getStorageClassSpecifierString(D->getStorageClass()) << " ";
538
539  if (!Policy.SuppressSpecifiers && D->isThreadSpecified())
540    Out << "__thread ";
541
542  std::string Name = D->getNameAsString();
543  QualType T = D->getType();
544  if (ParmVarDecl *Parm = dyn_cast<ParmVarDecl>(D))
545    T = Parm->getOriginalType();
546  T.getAsStringInternal(Name, Policy);
547  Out << Name;
548  if (Expr *Init = D->getInit()) {
549    if (D->hasCXXDirectInitializer())
550      Out << "(";
551    else {
552        CXXConstructExpr *CCE = dyn_cast<CXXConstructExpr>(Init);
553        if (!CCE || CCE->getConstructor()->isCopyConstructor())
554          Out << " = ";
555    }
556    Init->printPretty(Out, Context, 0, Policy, Indentation);
557    if (D->hasCXXDirectInitializer())
558      Out << ")";
559  }
560}
561
562void DeclPrinter::VisitParmVarDecl(ParmVarDecl *D) {
563  VisitVarDecl(D);
564}
565
566void DeclPrinter::VisitFileScopeAsmDecl(FileScopeAsmDecl *D) {
567  Out << "__asm (";
568  D->getAsmString()->printPretty(Out, Context, 0, Policy, Indentation);
569  Out << ")";
570}
571
572//----------------------------------------------------------------------------
573// C++ declarations
574//----------------------------------------------------------------------------
575void DeclPrinter::VisitNamespaceDecl(NamespaceDecl *D) {
576  Out << "namespace " << D << " {\n";
577  VisitDeclContext(D);
578  Indent() << "}";
579}
580
581void DeclPrinter::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
582  Out << "using namespace ";
583  if (D->getQualifier())
584    D->getQualifier()->print(Out, Policy);
585  Out << D->getNominatedNamespaceAsWritten();
586}
587
588void DeclPrinter::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
589  Out << "namespace " << D << " = ";
590  if (D->getQualifier())
591    D->getQualifier()->print(Out, Policy);
592  Out << D->getAliasedNamespace();
593}
594
595void DeclPrinter::VisitCXXRecordDecl(CXXRecordDecl *D) {
596  Out << D->getKindName();
597  if (D->getIdentifier())
598    Out << ' ' << D;
599
600  if (D->isDefinition()) {
601    // Print the base classes
602    if (D->getNumBases()) {
603      Out << " : ";
604      for (CXXRecordDecl::base_class_iterator Base = D->bases_begin(),
605             BaseEnd = D->bases_end(); Base != BaseEnd; ++Base) {
606        if (Base != D->bases_begin())
607          Out << ", ";
608
609        if (Base->isVirtual())
610          Out << "virtual ";
611
612        AccessSpecifier AS = Base->getAccessSpecifierAsWritten();
613        if (AS != AS_none)
614          Print(AS);
615        Out << " " << Base->getType().getAsString(Policy);
616      }
617    }
618
619    // Print the class definition
620    // FIXME: Doesn't print access specifiers, e.g., "public:"
621    Out << " {\n";
622    VisitDeclContext(D);
623    Indent() << "}";
624  }
625}
626
627void DeclPrinter::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
628  const char *l;
629  if (D->getLanguage() == LinkageSpecDecl::lang_c)
630    l = "C";
631  else {
632    assert(D->getLanguage() == LinkageSpecDecl::lang_cxx &&
633           "unknown language in linkage specification");
634    l = "C++";
635  }
636
637  Out << "extern \"" << l << "\" ";
638  if (D->hasBraces()) {
639    Out << "{\n";
640    VisitDeclContext(D);
641    Indent() << "}";
642  } else
643    Visit(*D->decls_begin());
644}
645
646void DeclPrinter::VisitTemplateDecl(TemplateDecl *D) {
647  Out << "template <";
648
649  TemplateParameterList *Params = D->getTemplateParameters();
650  for (unsigned i = 0, e = Params->size(); i != e; ++i) {
651    if (i != 0)
652      Out << ", ";
653
654    const Decl *Param = Params->getParam(i);
655    if (const TemplateTypeParmDecl *TTP =
656          dyn_cast<TemplateTypeParmDecl>(Param)) {
657
658      QualType ParamType =
659        Context.getTypeDeclType(const_cast<TemplateTypeParmDecl*>(TTP));
660
661      if (TTP->wasDeclaredWithTypename())
662        Out << "typename ";
663      else
664        Out << "class ";
665
666      if (TTP->isParameterPack())
667        Out << "... ";
668
669      Out << ParamType.getAsString(Policy);
670
671      if (TTP->hasDefaultArgument()) {
672        Out << " = ";
673        Out << TTP->getDefaultArgument().getAsString(Policy);
674      };
675    } else if (const NonTypeTemplateParmDecl *NTTP =
676                 dyn_cast<NonTypeTemplateParmDecl>(Param)) {
677      Out << NTTP->getType().getAsString(Policy);
678
679      if (IdentifierInfo *Name = NTTP->getIdentifier()) {
680        Out << ' ';
681        Out << Name->getName();
682      }
683
684      if (NTTP->hasDefaultArgument()) {
685        Out << " = ";
686        NTTP->getDefaultArgument()->printPretty(Out, Context, 0, Policy,
687                                                Indentation);
688      }
689    }
690  }
691
692  Out << "> ";
693
694  if (isa<TemplateTemplateParmDecl>(D)) {
695    Out << "class " << D->getName();
696  } else {
697    Visit(D->getTemplatedDecl());
698  }
699}
700
701//----------------------------------------------------------------------------
702// Objective-C declarations
703//----------------------------------------------------------------------------
704
705void DeclPrinter::VisitObjCClassDecl(ObjCClassDecl *D) {
706  Out << "@class ";
707  for (ObjCClassDecl::iterator I = D->begin(), E = D->end();
708       I != E; ++I) {
709    if (I != D->begin()) Out << ", ";
710    Out << I->getInterface();
711  }
712}
713
714void DeclPrinter::VisitObjCMethodDecl(ObjCMethodDecl *OMD) {
715  if (OMD->isInstanceMethod())
716    Out << "- ";
717  else
718    Out << "+ ";
719  if (!OMD->getResultType().isNull())
720    Out << '(' << OMD->getResultType().getAsString(Policy) << ")";
721
722  std::string name = OMD->getSelector().getAsString();
723  std::string::size_type pos, lastPos = 0;
724  for (ObjCMethodDecl::param_iterator PI = OMD->param_begin(),
725       E = OMD->param_end(); PI != E; ++PI) {
726    // FIXME: selector is missing here!
727    pos = name.find_first_of(":", lastPos);
728    Out << " " << name.substr(lastPos, pos - lastPos);
729    Out << ":(" << (*PI)->getType().getAsString(Policy) << ')' << *PI;
730    lastPos = pos + 1;
731  }
732
733  if (OMD->param_begin() == OMD->param_end())
734    Out << " " << name;
735
736  if (OMD->isVariadic())
737      Out << ", ...";
738
739  if (OMD->getBody()) {
740    Out << ' ';
741    OMD->getBody()->printPretty(Out, Context, 0, Policy);
742    Out << '\n';
743  }
744}
745
746void DeclPrinter::VisitObjCImplementationDecl(ObjCImplementationDecl *OID) {
747  std::string I = OID->getNameAsString();
748  ObjCInterfaceDecl *SID = OID->getSuperClass();
749
750  if (SID)
751    Out << "@implementation " << I << " : " << SID;
752  else
753    Out << "@implementation " << I;
754  Out << "\n";
755  VisitDeclContext(OID, false);
756  Out << "@end";
757}
758
759void DeclPrinter::VisitObjCInterfaceDecl(ObjCInterfaceDecl *OID) {
760  std::string I = OID->getNameAsString();
761  ObjCInterfaceDecl *SID = OID->getSuperClass();
762
763  if (SID)
764    Out << "@interface " << I << " : " << SID;
765  else
766    Out << "@interface " << I;
767
768  // Protocols?
769  const ObjCList<ObjCProtocolDecl> &Protocols = OID->getReferencedProtocols();
770  if (!Protocols.empty()) {
771    for (ObjCList<ObjCProtocolDecl>::iterator I = Protocols.begin(),
772         E = Protocols.end(); I != E; ++I)
773      Out << (I == Protocols.begin() ? '<' : ',') << *I;
774  }
775
776  if (!Protocols.empty())
777    Out << "> ";
778
779  if (OID->ivar_size() > 0) {
780    Out << "{\n";
781    Indentation += Policy.Indentation;
782    for (ObjCInterfaceDecl::ivar_iterator I = OID->ivar_begin(),
783         E = OID->ivar_end(); I != E; ++I) {
784      Indent() << (*I)->getType().getAsString(Policy) << ' ' << *I << ";\n";
785    }
786    Indentation -= Policy.Indentation;
787    Out << "}\n";
788  }
789
790  VisitDeclContext(OID, false);
791  Out << "@end";
792  // FIXME: implement the rest...
793}
794
795void DeclPrinter::VisitObjCForwardProtocolDecl(ObjCForwardProtocolDecl *D) {
796  Out << "@protocol ";
797  for (ObjCForwardProtocolDecl::protocol_iterator I = D->protocol_begin(),
798         E = D->protocol_end();
799       I != E; ++I) {
800    if (I != D->protocol_begin()) Out << ", ";
801    Out << *I;
802  }
803}
804
805void DeclPrinter::VisitObjCProtocolDecl(ObjCProtocolDecl *PID) {
806  Out << "@protocol " << PID << '\n';
807  VisitDeclContext(PID, false);
808  Out << "@end";
809}
810
811void DeclPrinter::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *PID) {
812  Out << "@implementation " << PID->getClassInterface() << '(' << PID << ")\n";
813
814  VisitDeclContext(PID, false);
815  Out << "@end";
816  // FIXME: implement the rest...
817}
818
819void DeclPrinter::VisitObjCCategoryDecl(ObjCCategoryDecl *PID) {
820  Out << "@interface " << PID->getClassInterface() << '(' << PID << ")\n";
821  VisitDeclContext(PID, false);
822  Out << "@end";
823
824  // FIXME: implement the rest...
825}
826
827void DeclPrinter::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *AID) {
828  Out << "@compatibility_alias " << AID
829      << ' ' << AID->getClassInterface() << ";\n";
830}
831
832/// PrintObjCPropertyDecl - print a property declaration.
833///
834void DeclPrinter::VisitObjCPropertyDecl(ObjCPropertyDecl *PDecl) {
835  if (PDecl->getPropertyImplementation() == ObjCPropertyDecl::Required)
836    Out << "@required\n";
837  else if (PDecl->getPropertyImplementation() == ObjCPropertyDecl::Optional)
838    Out << "@optional\n";
839
840  Out << "@property";
841  if (PDecl->getPropertyAttributes() != ObjCPropertyDecl::OBJC_PR_noattr) {
842    bool first = true;
843    Out << " (";
844    if (PDecl->getPropertyAttributes() &
845        ObjCPropertyDecl::OBJC_PR_readonly) {
846      Out << (first ? ' ' : ',') << "readonly";
847      first = false;
848  }
849
850  if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) {
851    Out << (first ? ' ' : ',') << "getter = "
852        << PDecl->getGetterName().getAsString();
853    first = false;
854  }
855  if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) {
856    Out << (first ? ' ' : ',') << "setter = "
857        << PDecl->getSetterName().getAsString();
858    first = false;
859  }
860
861  if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_assign) {
862    Out << (first ? ' ' : ',') << "assign";
863    first = false;
864  }
865
866  if (PDecl->getPropertyAttributes() &
867      ObjCPropertyDecl::OBJC_PR_readwrite) {
868    Out << (first ? ' ' : ',') << "readwrite";
869    first = false;
870  }
871
872  if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_retain) {
873    Out << (first ? ' ' : ',') << "retain";
874    first = false;
875  }
876
877  if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_copy) {
878    Out << (first ? ' ' : ',') << "copy";
879    first = false;
880  }
881
882  if (PDecl->getPropertyAttributes() &
883      ObjCPropertyDecl::OBJC_PR_nonatomic) {
884    Out << (first ? ' ' : ',') << "nonatomic";
885    first = false;
886  }
887  Out << " )";
888  }
889  Out << ' ' << PDecl->getType().getAsString(Policy) << ' ' << PDecl;
890}
891
892void DeclPrinter::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *PID) {
893  if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize)
894    Out << "@synthesize ";
895  else
896    Out << "@dynamic ";
897  Out << PID->getPropertyDecl();
898  if (PID->getPropertyIvarDecl())
899    Out << '=' << PID->getPropertyIvarDecl();
900}
901
902void DeclPrinter::VisitUsingDecl(UsingDecl *D) {
903  Out << "using ";
904  D->getTargetNestedNameDecl()->print(Out, Policy);
905  Out << D;
906}
907
908void
909DeclPrinter::VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D) {
910  Out << "using typename ";
911  D->getTargetNestedNameSpecifier()->print(Out, Policy);
912  Out << D->getDeclName();
913}
914
915void DeclPrinter::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
916  Out << "using ";
917  D->getTargetNestedNameSpecifier()->print(Out, Policy);
918  Out << D->getDeclName();
919}
920
921void DeclPrinter::VisitUsingShadowDecl(UsingShadowDecl *D) {
922  // ignore
923}
924