DeclPrinter.cpp revision b8989f27f116ff2400e92a52c067a69846119eb5 
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    raw_ostream &Out;
28    ASTContext &Context;
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, ASTContext &Context,
41                const PrintingPolicy &Policy,
42                unsigned Indentation = 0,
43                bool PrintInstantiation = false)
44      : Out(Out), Context(Context), Policy(Policy), Indentation(Indentation),
45        PrintInstantiation(PrintInstantiation) { }
46
47    void VisitDeclContext(DeclContext *DC, bool Indent = true);
48
49    void VisitTranslationUnitDecl(TranslationUnitDecl *D);
50    void VisitTypedefDecl(TypedefDecl *D);
51    void VisitTypeAliasDecl(TypeAliasDecl *D);
52    void VisitEnumDecl(EnumDecl *D);
53    void VisitRecordDecl(RecordDecl *D);
54    void VisitEnumConstantDecl(EnumConstantDecl *D);
55    void VisitFunctionDecl(FunctionDecl *D);
56    void VisitFieldDecl(FieldDecl *D);
57    void VisitVarDecl(VarDecl *D);
58    void VisitLabelDecl(LabelDecl *D);
59    void VisitParmVarDecl(ParmVarDecl *D);
60    void VisitFileScopeAsmDecl(FileScopeAsmDecl *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 VisitObjCClassDecl(ObjCClassDecl *D);
72    void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
73    void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
74    void VisitObjCForwardProtocolDecl(ObjCForwardProtocolDecl *D);
75    void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
76    void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
77    void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
78    void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
79    void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
80    void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
81    void VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D);
82    void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D);
83    void VisitUsingDecl(UsingDecl *D);
84    void VisitUsingShadowDecl(UsingShadowDecl *D);
85
86    void PrintTemplateParameters(const TemplateParameterList *Params,
87                                 const TemplateArgumentList *Args);
88  };
89}
90
91void Decl::print(raw_ostream &Out, unsigned Indentation,
92                 bool PrintInstantiation) const {
93  print(Out, getASTContext().getPrintingPolicy(), Indentation, PrintInstantiation);
94}
95
96void Decl::print(raw_ostream &Out, const PrintingPolicy &Policy,
97                 unsigned Indentation, bool PrintInstantiation) const {
98  DeclPrinter Printer(Out, getASTContext(), Policy, Indentation, PrintInstantiation);
99  Printer.Visit(const_cast<Decl*>(this));
100}
101
102static QualType GetBaseType(QualType T) {
103  // FIXME: This should be on the Type class!
104  QualType BaseType = T;
105  while (!BaseType->isSpecifierType()) {
106    if (isa<TypedefType>(BaseType))
107      break;
108    else if (const PointerType* PTy = BaseType->getAs<PointerType>())
109      BaseType = PTy->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
117      llvm_unreachable("Unknown declarator!");
118  }
119  return BaseType;
120}
121
122static QualType getDeclType(Decl* D) {
123  if (TypedefNameDecl* TDD = dyn_cast<TypedefNameDecl>(D))
124    return TDD->getUnderlyingType();
125  if (ValueDecl* VD = dyn_cast<ValueDecl>(D))
126    return VD->getType();
127  return QualType();
128}
129
130void Decl::printGroup(Decl** Begin, unsigned NumDecls,
131                      raw_ostream &Out, const PrintingPolicy &Policy,
132                      unsigned Indentation) {
133  if (NumDecls == 1) {
134    (*Begin)->print(Out, Policy, Indentation);
135    return;
136  }
137
138  Decl** End = Begin + NumDecls;
139  TagDecl* TD = dyn_cast<TagDecl>(*Begin);
140  if (TD)
141    ++Begin;
142
143  PrintingPolicy SubPolicy(Policy);
144  if (TD && TD->isCompleteDefinition()) {
145    TD->print(Out, Policy, Indentation);
146    Out << " ";
147    SubPolicy.SuppressTag = true;
148  }
149
150  bool isFirst = true;
151  for ( ; Begin != End; ++Begin) {
152    if (isFirst) {
153      SubPolicy.SuppressSpecifiers = false;
154      isFirst = false;
155    } else {
156      if (!isFirst) Out << ", ";
157      SubPolicy.SuppressSpecifiers = true;
158    }
159
160    (*Begin)->print(Out, SubPolicy, Indentation);
161  }
162}
163
164void DeclContext::dumpDeclContext() const {
165  // Get the translation unit
166  const DeclContext *DC = this;
167  while (!DC->isTranslationUnit())
168    DC = DC->getParent();
169
170  ASTContext &Ctx = cast<TranslationUnitDecl>(DC)->getASTContext();
171  DeclPrinter Printer(llvm::errs(), Ctx, Ctx.getPrintingPolicy(), 0);
172  Printer.VisitDeclContext(const_cast<DeclContext *>(this), /*Indent=*/false);
173}
174
175void Decl::dump() const {
176  print(llvm::errs());
177}
178
179raw_ostream& DeclPrinter::Indent(unsigned Indentation) {
180  for (unsigned i = 0; i != Indentation; ++i)
181    Out << "  ";
182  return Out;
183}
184
185void DeclPrinter::ProcessDeclGroup(SmallVectorImpl<Decl*>& Decls) {
186  this->Indent();
187  Decl::printGroup(Decls.data(), Decls.size(), Out, Policy, Indentation);
188  Out << ";\n";
189  Decls.clear();
190
191}
192
193void DeclPrinter::Print(AccessSpecifier AS) {
194  switch(AS) {
195  case AS_none:      llvm_unreachable("No access specifier!");
196  case AS_public:    Out << "public"; break;
197  case AS_protected: Out << "protected"; break;
198  case AS_private:   Out << "private"; break;
199  }
200}
201
202//----------------------------------------------------------------------------
203// Common C declarations
204//----------------------------------------------------------------------------
205
206void DeclPrinter::VisitDeclContext(DeclContext *DC, bool Indent) {
207  if (Indent)
208    Indentation += Policy.Indentation;
209
210  SmallVector<Decl*, 2> Decls;
211  for (DeclContext::decl_iterator D = DC->decls_begin(), DEnd = DC->decls_end();
212       D != DEnd; ++D) {
213
214    // Don't print ObjCIvarDecls, as they are printed when visiting the
215    // containing ObjCInterfaceDecl.
216    if (isa<ObjCIvarDecl>(*D))
217      continue;
218
219    if (!Policy.Dump) {
220      // Skip over implicit declarations in pretty-printing mode.
221      if (D->isImplicit()) continue;
222      // FIXME: Ugly hack so we don't pretty-print the builtin declaration
223      // of __builtin_va_list or __[u]int128_t.  There should be some other way
224      // to check that.
225      if (NamedDecl *ND = dyn_cast<NamedDecl>(*D)) {
226        if (IdentifierInfo *II = ND->getIdentifier()) {
227          if (II->isStr("__builtin_va_list") ||
228              II->isStr("__int128_t") || II->isStr("__uint128_t"))
229            continue;
230        }
231      }
232    }
233
234    // The next bits of code handles stuff like "struct {int x;} a,b"; we're
235    // forced to merge the declarations because there's no other way to
236    // refer to the struct in question.  This limited merging is safe without
237    // a bunch of other checks because it only merges declarations directly
238    // referring to the tag, not typedefs.
239    //
240    // Check whether the current declaration should be grouped with a previous
241    // unnamed struct.
242    QualType CurDeclType = getDeclType(*D);
243    if (!Decls.empty() && !CurDeclType.isNull()) {
244      QualType BaseType = GetBaseType(CurDeclType);
245      if (!BaseType.isNull() && isa<TagType>(BaseType) &&
246          cast<TagType>(BaseType)->getDecl() == Decls[0]) {
247        Decls.push_back(*D);
248        continue;
249      }
250    }
251
252    // If we have a merged group waiting to be handled, handle it now.
253    if (!Decls.empty())
254      ProcessDeclGroup(Decls);
255
256    // If the current declaration is an unnamed tag type, save it
257    // so we can merge it with the subsequent declaration(s) using it.
258    if (isa<TagDecl>(*D) && !cast<TagDecl>(*D)->getIdentifier()) {
259      Decls.push_back(*D);
260      continue;
261    }
262
263    if (isa<AccessSpecDecl>(*D)) {
264      Indentation -= Policy.Indentation;
265      this->Indent();
266      Print(D->getAccess());
267      Out << ":\n";
268      Indentation += Policy.Indentation;
269      continue;
270    }
271
272    this->Indent();
273    Visit(*D);
274
275    // FIXME: Need to be able to tell the DeclPrinter when
276    const char *Terminator = 0;
277    if (isa<FunctionDecl>(*D) &&
278        cast<FunctionDecl>(*D)->isThisDeclarationADefinition())
279      Terminator = 0;
280    else if (isa<ObjCMethodDecl>(*D) && cast<ObjCMethodDecl>(*D)->getBody())
281      Terminator = 0;
282    else if (isa<NamespaceDecl>(*D) || isa<LinkageSpecDecl>(*D) ||
283             isa<ObjCImplementationDecl>(*D) ||
284             isa<ObjCInterfaceDecl>(*D) ||
285             isa<ObjCProtocolDecl>(*D) ||
286             isa<ObjCCategoryImplDecl>(*D) ||
287             isa<ObjCCategoryDecl>(*D))
288      Terminator = 0;
289    else if (isa<EnumConstantDecl>(*D)) {
290      DeclContext::decl_iterator Next = D;
291      ++Next;
292      if (Next != DEnd)
293        Terminator = ",";
294    } else
295      Terminator = ";";
296
297    if (Terminator)
298      Out << Terminator;
299    Out << "\n";
300  }
301
302  if (!Decls.empty())
303    ProcessDeclGroup(Decls);
304
305  if (Indent)
306    Indentation -= Policy.Indentation;
307}
308
309void DeclPrinter::VisitTranslationUnitDecl(TranslationUnitDecl *D) {
310  VisitDeclContext(D, false);
311}
312
313void DeclPrinter::VisitTypedefDecl(TypedefDecl *D) {
314  std::string S = D->getNameAsString();
315  D->getUnderlyingType().getAsStringInternal(S, Policy);
316  if (!Policy.SuppressSpecifiers) {
317    Out << "typedef ";
318
319    if (D->isModulePrivate())
320      Out << "__module_private__ ";
321  }
322  Out << S;
323}
324
325void DeclPrinter::VisitTypeAliasDecl(TypeAliasDecl *D) {
326  Out << "using " << D->getNameAsString() << " = "
327      << D->getUnderlyingType().getAsString(Policy);
328}
329
330void DeclPrinter::VisitEnumDecl(EnumDecl *D) {
331  if (!Policy.SuppressSpecifiers && D->isModulePrivate())
332    Out << "__module_private__ ";
333  Out << "enum ";
334  if (D->isScoped()) {
335    if (D->isScopedUsingClassTag())
336      Out << "class ";
337    else
338      Out << "struct ";
339  }
340  Out << *D;
341
342  if (D->isFixed()) {
343    std::string Underlying;
344    D->getIntegerType().getAsStringInternal(Underlying, Policy);
345    Out << " : " << Underlying;
346  }
347
348  if (D->isCompleteDefinition()) {
349    Out << " {\n";
350    VisitDeclContext(D);
351    Indent() << "}";
352  }
353}
354
355void DeclPrinter::VisitRecordDecl(RecordDecl *D) {
356  if (!Policy.SuppressSpecifiers && D->isModulePrivate())
357    Out << "__module_private__ ";
358  Out << D->getKindName();
359  if (D->getIdentifier())
360    Out << ' ' << *D;
361
362  if (D->isCompleteDefinition()) {
363    Out << " {\n";
364    VisitDeclContext(D);
365    Indent() << "}";
366  }
367}
368
369void DeclPrinter::VisitEnumConstantDecl(EnumConstantDecl *D) {
370  Out << *D;
371  if (Expr *Init = D->getInitExpr()) {
372    Out << " = ";
373    Init->printPretty(Out, Context, 0, Policy, Indentation);
374  }
375}
376
377void DeclPrinter::VisitFunctionDecl(FunctionDecl *D) {
378  if (!Policy.SuppressSpecifiers) {
379    switch (D->getStorageClass()) {
380    case SC_None: break;
381    case SC_Extern: Out << "extern "; break;
382    case SC_Static: Out << "static "; break;
383    case SC_PrivateExtern: Out << "__private_extern__ "; break;
384    case SC_Auto: case SC_Register: case SC_OpenCLWorkGroupLocal:
385      llvm_unreachable("invalid for functions");
386    }
387
388    if (D->isInlineSpecified())  Out << "inline ";
389    if (D->isVirtualAsWritten()) Out << "virtual ";
390    if (D->isModulePrivate())    Out << "__module_private__ ";
391  }
392
393  PrintingPolicy SubPolicy(Policy);
394  SubPolicy.SuppressSpecifiers = false;
395  std::string Proto = D->getNameInfo().getAsString();
396
397  QualType Ty = D->getType();
398  while (const ParenType *PT = dyn_cast<ParenType>(Ty)) {
399    Proto = '(' + Proto + ')';
400    Ty = PT->getInnerType();
401  }
402
403  if (isa<FunctionType>(Ty)) {
404    const FunctionType *AFT = Ty->getAs<FunctionType>();
405    const FunctionProtoType *FT = 0;
406    if (D->hasWrittenPrototype())
407      FT = dyn_cast<FunctionProtoType>(AFT);
408
409    Proto += "(";
410    if (FT) {
411      llvm::raw_string_ostream POut(Proto);
412      DeclPrinter ParamPrinter(POut, Context, SubPolicy, Indentation);
413      for (unsigned i = 0, e = D->getNumParams(); i != e; ++i) {
414        if (i) POut << ", ";
415        ParamPrinter.VisitParmVarDecl(D->getParamDecl(i));
416      }
417
418      if (FT->isVariadic()) {
419        if (D->getNumParams()) POut << ", ";
420        POut << "...";
421      }
422    } else if (D->doesThisDeclarationHaveABody() && !D->hasPrototype()) {
423      for (unsigned i = 0, e = D->getNumParams(); i != e; ++i) {
424        if (i)
425          Proto += ", ";
426        Proto += D->getParamDecl(i)->getNameAsString();
427      }
428    }
429
430    Proto += ")";
431
432    if (FT && FT->getTypeQuals()) {
433      unsigned TypeQuals = FT->getTypeQuals();
434      if (TypeQuals & Qualifiers::Const)
435        Proto += " const";
436      if (TypeQuals & Qualifiers::Volatile)
437        Proto += " volatile";
438      if (TypeQuals & Qualifiers::Restrict)
439        Proto += " restrict";
440    }
441
442    if (FT && FT->hasDynamicExceptionSpec()) {
443      Proto += " throw(";
444      if (FT->getExceptionSpecType() == EST_MSAny)
445        Proto += "...";
446      else
447        for (unsigned I = 0, N = FT->getNumExceptions(); I != N; ++I) {
448          if (I)
449            Proto += ", ";
450
451          std::string ExceptionType;
452          FT->getExceptionType(I).getAsStringInternal(ExceptionType, SubPolicy);
453          Proto += ExceptionType;
454        }
455      Proto += ")";
456    } else if (FT && isNoexceptExceptionSpec(FT->getExceptionSpecType())) {
457      Proto += " noexcept";
458      if (FT->getExceptionSpecType() == EST_ComputedNoexcept) {
459        Proto += "(";
460        llvm::raw_string_ostream EOut(Proto);
461        FT->getNoexceptExpr()->printPretty(EOut, Context, 0, SubPolicy,
462                                           Indentation);
463        EOut.flush();
464        Proto += EOut.str();
465        Proto += ")";
466      }
467    }
468
469    if (D->hasAttr<NoReturnAttr>())
470      Proto += " __attribute((noreturn))";
471
472    if (D->hasAttr<ReturnsTwiceAttr>())
473      Proto += " __attribute((returns_twice))";
474
475    if (CXXConstructorDecl *CDecl = dyn_cast<CXXConstructorDecl>(D)) {
476      bool HasInitializerList = false;
477      for (CXXConstructorDecl::init_const_iterator B = CDecl->init_begin(),
478           E = CDecl->init_end();
479           B != E; ++B) {
480        CXXCtorInitializer * BMInitializer = (*B);
481        if (BMInitializer->isInClassMemberInitializer())
482          continue;
483
484        if (!HasInitializerList) {
485          Proto += " : ";
486          Out << Proto;
487          Proto.clear();
488          HasInitializerList = true;
489        } else
490          Out << ", ";
491
492        if (BMInitializer->isAnyMemberInitializer()) {
493          FieldDecl *FD = BMInitializer->getAnyMember();
494          Out << *FD;
495        } else {
496          Out << QualType(BMInitializer->getBaseClass(), 0).getAsString(Policy);
497        }
498
499        Out << "(";
500        if (!BMInitializer->getInit()) {
501          // Nothing to print
502        } else {
503          Expr *Init = BMInitializer->getInit();
504          if (ExprWithCleanups *Tmp = dyn_cast<ExprWithCleanups>(Init))
505            Init = Tmp->getSubExpr();
506
507          Init = Init->IgnoreParens();
508
509          Expr *SimpleInit = 0;
510          Expr **Args = 0;
511          unsigned NumArgs = 0;
512          if (ParenListExpr *ParenList = dyn_cast<ParenListExpr>(Init)) {
513            Args = ParenList->getExprs();
514            NumArgs = ParenList->getNumExprs();
515          } else if (CXXConstructExpr *Construct
516                                        = dyn_cast<CXXConstructExpr>(Init)) {
517            Args = Construct->getArgs();
518            NumArgs = Construct->getNumArgs();
519          } else
520            SimpleInit = Init;
521
522          if (SimpleInit)
523            SimpleInit->printPretty(Out, Context, 0, Policy, Indentation);
524          else {
525            for (unsigned I = 0; I != NumArgs; ++I) {
526              if (isa<CXXDefaultArgExpr>(Args[I]))
527                break;
528
529              if (I)
530                Out << ", ";
531              Args[I]->printPretty(Out, Context, 0, Policy, Indentation);
532            }
533          }
534        }
535        Out << ")";
536      }
537    }
538    else
539      AFT->getResultType().getAsStringInternal(Proto, Policy);
540  } else {
541    Ty.getAsStringInternal(Proto, Policy);
542  }
543
544  Out << Proto;
545
546  if (D->isPure())
547    Out << " = 0";
548  else if (D->isDeletedAsWritten())
549    Out << " = delete";
550  else if (D->doesThisDeclarationHaveABody()) {
551    if (!D->hasPrototype() && D->getNumParams()) {
552      // This is a K&R function definition, so we need to print the
553      // parameters.
554      Out << '\n';
555      DeclPrinter ParamPrinter(Out, Context, SubPolicy, Indentation);
556      Indentation += Policy.Indentation;
557      for (unsigned i = 0, e = D->getNumParams(); i != e; ++i) {
558        Indent();
559        ParamPrinter.VisitParmVarDecl(D->getParamDecl(i));
560        Out << ";\n";
561      }
562      Indentation -= Policy.Indentation;
563    } else
564      Out << ' ';
565
566    D->getBody()->printPretty(Out, Context, 0, SubPolicy, Indentation);
567    Out << '\n';
568  }
569}
570
571void DeclPrinter::VisitFieldDecl(FieldDecl *D) {
572  if (!Policy.SuppressSpecifiers && D->isMutable())
573    Out << "mutable ";
574  if (!Policy.SuppressSpecifiers && D->isModulePrivate())
575    Out << "__module_private__ ";
576
577  std::string Name = D->getNameAsString();
578  D->getType().getAsStringInternal(Name, Policy);
579  Out << Name;
580
581  if (D->isBitField()) {
582    Out << " : ";
583    D->getBitWidth()->printPretty(Out, Context, 0, Policy, Indentation);
584  }
585
586  Expr *Init = D->getInClassInitializer();
587  if (!Policy.SuppressInitializers && Init) {
588    Out << " = ";
589    Init->printPretty(Out, Context, 0, Policy, Indentation);
590  }
591}
592
593void DeclPrinter::VisitLabelDecl(LabelDecl *D) {
594  Out << D->getNameAsString() << ":";
595}
596
597
598void DeclPrinter::VisitVarDecl(VarDecl *D) {
599  if (!Policy.SuppressSpecifiers && D->getStorageClass() != SC_None)
600    Out << VarDecl::getStorageClassSpecifierString(D->getStorageClass()) << " ";
601
602  if (!Policy.SuppressSpecifiers && D->isThreadSpecified())
603    Out << "__thread ";
604  if (!Policy.SuppressSpecifiers && D->isModulePrivate())
605    Out << "__module_private__ ";
606
607  std::string Name = D->getNameAsString();
608  QualType T = D->getType();
609  if (ParmVarDecl *Parm = dyn_cast<ParmVarDecl>(D))
610    T = Parm->getOriginalType();
611  T.getAsStringInternal(Name, Policy);
612  Out << Name;
613  Expr *Init = D->getInit();
614  if (!Policy.SuppressInitializers && Init) {
615    if (D->hasCXXDirectInitializer())
616      Out << "(";
617    else {
618        CXXConstructExpr *CCE = dyn_cast<CXXConstructExpr>(Init);
619        if (!CCE || CCE->getConstructor()->isCopyConstructor())
620          Out << " = ";
621    }
622    Init->printPretty(Out, Context, 0, Policy, Indentation);
623    if (D->hasCXXDirectInitializer())
624      Out << ")";
625  }
626}
627
628void DeclPrinter::VisitParmVarDecl(ParmVarDecl *D) {
629  VisitVarDecl(D);
630}
631
632void DeclPrinter::VisitFileScopeAsmDecl(FileScopeAsmDecl *D) {
633  Out << "__asm (";
634  D->getAsmString()->printPretty(Out, Context, 0, Policy, Indentation);
635  Out << ")";
636}
637
638void DeclPrinter::VisitStaticAssertDecl(StaticAssertDecl *D) {
639  Out << "static_assert(";
640  D->getAssertExpr()->printPretty(Out, Context, 0, Policy, Indentation);
641  Out << ", ";
642  D->getMessage()->printPretty(Out, Context, 0, Policy, Indentation);
643  Out << ")";
644}
645
646//----------------------------------------------------------------------------
647// C++ declarations
648//----------------------------------------------------------------------------
649void DeclPrinter::VisitNamespaceDecl(NamespaceDecl *D) {
650  Out << "namespace " << *D << " {\n";
651  VisitDeclContext(D);
652  Indent() << "}";
653}
654
655void DeclPrinter::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
656  Out << "using namespace ";
657  if (D->getQualifier())
658    D->getQualifier()->print(Out, Policy);
659  Out << *D->getNominatedNamespaceAsWritten();
660}
661
662void DeclPrinter::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
663  Out << "namespace " << *D << " = ";
664  if (D->getQualifier())
665    D->getQualifier()->print(Out, Policy);
666  Out << *D->getAliasedNamespace();
667}
668
669void DeclPrinter::VisitCXXRecordDecl(CXXRecordDecl *D) {
670  if (!Policy.SuppressSpecifiers && D->isModulePrivate())
671    Out << "__module_private__ ";
672  Out << D->getKindName();
673  if (D->getIdentifier())
674    Out << ' ' << *D;
675
676  if (D->isCompleteDefinition()) {
677    // Print the base classes
678    if (D->getNumBases()) {
679      Out << " : ";
680      for (CXXRecordDecl::base_class_iterator Base = D->bases_begin(),
681             BaseEnd = D->bases_end(); Base != BaseEnd; ++Base) {
682        if (Base != D->bases_begin())
683          Out << ", ";
684
685        if (Base->isVirtual())
686          Out << "virtual ";
687
688        AccessSpecifier AS = Base->getAccessSpecifierAsWritten();
689        if (AS != AS_none)
690          Print(AS);
691        Out << " " << Base->getType().getAsString(Policy);
692
693        if (Base->isPackExpansion())
694          Out << "...";
695      }
696    }
697
698    // Print the class definition
699    // FIXME: Doesn't print access specifiers, e.g., "public:"
700    Out << " {\n";
701    VisitDeclContext(D);
702    Indent() << "}";
703  }
704}
705
706void DeclPrinter::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
707  const char *l;
708  if (D->getLanguage() == LinkageSpecDecl::lang_c)
709    l = "C";
710  else {
711    assert(D->getLanguage() == LinkageSpecDecl::lang_cxx &&
712           "unknown language in linkage specification");
713    l = "C++";
714  }
715
716  Out << "extern \"" << l << "\" ";
717  if (D->hasBraces()) {
718    Out << "{\n";
719    VisitDeclContext(D);
720    Indent() << "}";
721  } else
722    Visit(*D->decls_begin());
723}
724
725void DeclPrinter::PrintTemplateParameters(
726    const TemplateParameterList *Params, const TemplateArgumentList *Args = 0) {
727  assert(Params);
728  assert(!Args || Params->size() == Args->size());
729
730  Out << "template <";
731
732  for (unsigned i = 0, e = Params->size(); i != e; ++i) {
733    if (i != 0)
734      Out << ", ";
735
736    const Decl *Param = Params->getParam(i);
737    if (const TemplateTypeParmDecl *TTP =
738          dyn_cast<TemplateTypeParmDecl>(Param)) {
739
740      if (TTP->wasDeclaredWithTypename())
741        Out << "typename ";
742      else
743        Out << "class ";
744
745      if (TTP->isParameterPack())
746        Out << "... ";
747
748      Out << TTP->getNameAsString();
749
750      if (Args) {
751        Out << " = ";
752        Args->get(i).print(Policy, Out);
753      } else if (TTP->hasDefaultArgument()) {
754        Out << " = ";
755        Out << TTP->getDefaultArgument().getAsString(Policy);
756      };
757    } else if (const NonTypeTemplateParmDecl *NTTP =
758                 dyn_cast<NonTypeTemplateParmDecl>(Param)) {
759      Out << NTTP->getType().getAsString(Policy);
760
761      if (NTTP->isParameterPack() && !isa<PackExpansionType>(NTTP->getType()))
762        Out << "...";
763
764      if (IdentifierInfo *Name = NTTP->getIdentifier()) {
765        Out << ' ';
766        Out << Name->getName();
767      }
768
769      if (Args) {
770        Out << " = ";
771        Args->get(i).print(Policy, Out);
772      } else if (NTTP->hasDefaultArgument()) {
773        Out << " = ";
774        NTTP->getDefaultArgument()->printPretty(Out, Context, 0, Policy,
775                                                Indentation);
776      }
777    } else if (const TemplateTemplateParmDecl *TTPD =
778                 dyn_cast<TemplateTemplateParmDecl>(Param)) {
779      VisitTemplateDecl(TTPD);
780      // FIXME: print the default argument, if present.
781    }
782  }
783
784  Out << "> ";
785}
786
787void DeclPrinter::VisitTemplateDecl(const TemplateDecl *D) {
788  PrintTemplateParameters(D->getTemplateParameters());
789
790  if (const TemplateTemplateParmDecl *TTP =
791        dyn_cast<TemplateTemplateParmDecl>(D)) {
792    Out << "class ";
793    if (TTP->isParameterPack())
794      Out << "...";
795    Out << D->getName();
796  } else {
797    Visit(D->getTemplatedDecl());
798  }
799}
800
801void DeclPrinter::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
802  if (PrintInstantiation) {
803    TemplateParameterList *Params = D->getTemplateParameters();
804    for (FunctionTemplateDecl::spec_iterator I = D->spec_begin(), E = D->spec_end();
805         I != E; ++I) {
806      PrintTemplateParameters(Params, (*I)->getTemplateSpecializationArgs());
807      Visit(*I);
808    }
809  }
810
811  return VisitRedeclarableTemplateDecl(D);
812}
813
814void DeclPrinter::VisitClassTemplateDecl(ClassTemplateDecl *D) {
815  if (PrintInstantiation) {
816    TemplateParameterList *Params = D->getTemplateParameters();
817    for (ClassTemplateDecl::spec_iterator I = D->spec_begin(), E = D->spec_end();
818         I != E; ++I) {
819      PrintTemplateParameters(Params, &(*I)->getTemplateArgs());
820      Visit(*I);
821      Out << '\n';
822    }
823  }
824
825  return VisitRedeclarableTemplateDecl(D);
826}
827
828//----------------------------------------------------------------------------
829// Objective-C declarations
830//----------------------------------------------------------------------------
831
832void DeclPrinter::VisitObjCClassDecl(ObjCClassDecl *D) {
833  Out << "@class " << *D->getForwardInterfaceDecl();
834}
835
836void DeclPrinter::VisitObjCMethodDecl(ObjCMethodDecl *OMD) {
837  if (OMD->isInstanceMethod())
838    Out << "- ";
839  else
840    Out << "+ ";
841  if (!OMD->getResultType().isNull())
842    Out << '(' << OMD->getResultType().getAsString(Policy) << ")";
843
844  std::string name = OMD->getSelector().getAsString();
845  std::string::size_type pos, lastPos = 0;
846  for (ObjCMethodDecl::param_iterator PI = OMD->param_begin(),
847       E = OMD->param_end(); PI != E; ++PI) {
848    // FIXME: selector is missing here!
849    pos = name.find_first_of(':', lastPos);
850    Out << " " << name.substr(lastPos, pos - lastPos);
851    Out << ":(" << (*PI)->getType().getAsString(Policy) << ')' << **PI;
852    lastPos = pos + 1;
853  }
854
855  if (OMD->param_begin() == OMD->param_end())
856    Out << " " << name;
857
858  if (OMD->isVariadic())
859      Out << ", ...";
860
861  if (OMD->getBody()) {
862    Out << ' ';
863    OMD->getBody()->printPretty(Out, Context, 0, Policy);
864    Out << '\n';
865  }
866}
867
868void DeclPrinter::VisitObjCImplementationDecl(ObjCImplementationDecl *OID) {
869  std::string I = OID->getNameAsString();
870  ObjCInterfaceDecl *SID = OID->getSuperClass();
871
872  if (SID)
873    Out << "@implementation " << I << " : " << *SID;
874  else
875    Out << "@implementation " << I;
876  Out << "\n";
877  VisitDeclContext(OID, false);
878  Out << "@end";
879}
880
881void DeclPrinter::VisitObjCInterfaceDecl(ObjCInterfaceDecl *OID) {
882  std::string I = OID->getNameAsString();
883  ObjCInterfaceDecl *SID = OID->getSuperClass();
884
885  if (SID)
886    Out << "@interface " << I << " : " << *SID;
887  else
888    Out << "@interface " << I;
889
890  // Protocols?
891  const ObjCList<ObjCProtocolDecl> &Protocols = OID->getReferencedProtocols();
892  if (!Protocols.empty()) {
893    for (ObjCList<ObjCProtocolDecl>::iterator I = Protocols.begin(),
894         E = Protocols.end(); I != E; ++I)
895      Out << (I == Protocols.begin() ? '<' : ',') << **I;
896  }
897
898  if (!Protocols.empty())
899    Out << "> ";
900
901  if (OID->ivar_size() > 0) {
902    Out << "{\n";
903    Indentation += Policy.Indentation;
904    for (ObjCInterfaceDecl::ivar_iterator I = OID->ivar_begin(),
905         E = OID->ivar_end(); I != E; ++I) {
906      Indent() << (*I)->getType().getAsString(Policy) << ' ' << **I << ";\n";
907    }
908    Indentation -= Policy.Indentation;
909    Out << "}\n";
910  }
911
912  VisitDeclContext(OID, false);
913  Out << "@end";
914  // FIXME: implement the rest...
915}
916
917void DeclPrinter::VisitObjCForwardProtocolDecl(ObjCForwardProtocolDecl *D) {
918  Out << "@protocol ";
919  for (ObjCForwardProtocolDecl::protocol_iterator I = D->protocol_begin(),
920         E = D->protocol_end();
921       I != E; ++I) {
922    if (I != D->protocol_begin()) Out << ", ";
923    Out << **I;
924  }
925}
926
927void DeclPrinter::VisitObjCProtocolDecl(ObjCProtocolDecl *PID) {
928  Out << "@protocol " << *PID << '\n';
929  VisitDeclContext(PID, false);
930  Out << "@end";
931}
932
933void DeclPrinter::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *PID) {
934  Out << "@implementation " << *PID->getClassInterface() << '(' << *PID <<")\n";
935
936  VisitDeclContext(PID, false);
937  Out << "@end";
938  // FIXME: implement the rest...
939}
940
941void DeclPrinter::VisitObjCCategoryDecl(ObjCCategoryDecl *PID) {
942  Out << "@interface " << *PID->getClassInterface() << '(' << *PID << ")\n";
943  VisitDeclContext(PID, false);
944  Out << "@end";
945
946  // FIXME: implement the rest...
947}
948
949void DeclPrinter::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *AID) {
950  Out << "@compatibility_alias " << *AID
951      << ' ' << *AID->getClassInterface() << ";\n";
952}
953
954/// PrintObjCPropertyDecl - print a property declaration.
955///
956void DeclPrinter::VisitObjCPropertyDecl(ObjCPropertyDecl *PDecl) {
957  if (PDecl->getPropertyImplementation() == ObjCPropertyDecl::Required)
958    Out << "@required\n";
959  else if (PDecl->getPropertyImplementation() == ObjCPropertyDecl::Optional)
960    Out << "@optional\n";
961
962  Out << "@property";
963  if (PDecl->getPropertyAttributes() != ObjCPropertyDecl::OBJC_PR_noattr) {
964    bool first = true;
965    Out << " (";
966    if (PDecl->getPropertyAttributes() &
967        ObjCPropertyDecl::OBJC_PR_readonly) {
968      Out << (first ? ' ' : ',') << "readonly";
969      first = false;
970    }
971
972    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) {
973      Out << (first ? ' ' : ',') << "getter = "
974          << PDecl->getGetterName().getAsString();
975      first = false;
976    }
977    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) {
978      Out << (first ? ' ' : ',') << "setter = "
979          << PDecl->getSetterName().getAsString();
980      first = false;
981    }
982
983    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_assign) {
984      Out << (first ? ' ' : ',') << "assign";
985      first = false;
986    }
987
988    if (PDecl->getPropertyAttributes() &
989        ObjCPropertyDecl::OBJC_PR_readwrite) {
990      Out << (first ? ' ' : ',') << "readwrite";
991      first = false;
992    }
993
994    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_retain) {
995      Out << (first ? ' ' : ',') << "retain";
996      first = false;
997    }
998
999    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_strong) {
1000      Out << (first ? ' ' : ',') << "strong";
1001      first = false;
1002    }
1003
1004    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_copy) {
1005      Out << (first ? ' ' : ',') << "copy";
1006      first = false;
1007    }
1008
1009    if (PDecl->getPropertyAttributes() &
1010        ObjCPropertyDecl::OBJC_PR_nonatomic) {
1011      Out << (first ? ' ' : ',') << "nonatomic";
1012      first = false;
1013    }
1014    if (PDecl->getPropertyAttributes() &
1015        ObjCPropertyDecl::OBJC_PR_atomic) {
1016      Out << (first ? ' ' : ',') << "atomic";
1017      first = false;
1018    }
1019
1020    (void) first; // Silence dead store warning due to idiomatic code.
1021    Out << " )";
1022  }
1023  Out << ' ' << PDecl->getType().getAsString(Policy) << ' ' << *PDecl;
1024}
1025
1026void DeclPrinter::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *PID) {
1027  if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize)
1028    Out << "@synthesize ";
1029  else
1030    Out << "@dynamic ";
1031  Out << *PID->getPropertyDecl();
1032  if (PID->getPropertyIvarDecl())
1033    Out << '=' << *PID->getPropertyIvarDecl();
1034}
1035
1036void DeclPrinter::VisitUsingDecl(UsingDecl *D) {
1037  Out << "using ";
1038  D->getQualifier()->print(Out, Policy);
1039  Out << *D;
1040}
1041
1042void
1043DeclPrinter::VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D) {
1044  Out << "using typename ";
1045  D->getQualifier()->print(Out, Policy);
1046  Out << D->getDeclName();
1047}
1048
1049void DeclPrinter::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
1050  Out << "using ";
1051  D->getQualifier()->print(Out, Policy);
1052  Out << D->getDeclName();
1053}
1054
1055void DeclPrinter::VisitUsingShadowDecl(UsingShadowDecl *D) {
1056  // ignore
1057}
1058