DeclPrinter.cpp revision 8920eb7a957f3b0bc4a8213ecdaec9a7fcd139ea 
1//===--- DeclPrinter.cpp - Printing implementation for Decl ASTs ----------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file implements the Decl::dump method, which pretty print the
11// AST back out to C/Objective-C/C++/Objective-C++ code.
12//
13//===----------------------------------------------------------------------===//
14#include "clang/AST/ASTContext.h"
15#include "clang/AST/Attr.h"
16#include "clang/AST/Decl.h"
17#include "clang/AST/DeclCXX.h"
18#include "clang/AST/DeclObjC.h"
19#include "clang/AST/DeclVisitor.h"
20#include "clang/AST/Expr.h"
21#include "clang/AST/ExprCXX.h"
22#include "clang/AST/PrettyPrinter.h"
23#include "clang/Basic/Module.h"
24#include "llvm/Support/raw_ostream.h"
25using namespace clang;
26
27namespace {
28  class DeclPrinter : public DeclVisitor<DeclPrinter> {
29    raw_ostream &Out;
30    PrintingPolicy Policy;
31    unsigned Indentation;
32    bool PrintInstantiation;
33
34    raw_ostream& Indent() { return Indent(Indentation); }
35    raw_ostream& Indent(unsigned Indentation);
36    void ProcessDeclGroup(SmallVectorImpl<Decl*>& Decls);
37
38    void Print(AccessSpecifier AS);
39
40  public:
41    DeclPrinter(raw_ostream &Out, const PrintingPolicy &Policy,
42                unsigned Indentation = 0, bool PrintInstantiation = false)
43      : Out(Out), Policy(Policy), Indentation(Indentation),
44        PrintInstantiation(PrintInstantiation) { }
45
46    void VisitDeclContext(DeclContext *DC, bool Indent = true);
47
48    void VisitTranslationUnitDecl(TranslationUnitDecl *D);
49    void VisitTypedefDecl(TypedefDecl *D);
50    void VisitTypeAliasDecl(TypeAliasDecl *D);
51    void VisitEnumDecl(EnumDecl *D);
52    void VisitRecordDecl(RecordDecl *D);
53    void VisitEnumConstantDecl(EnumConstantDecl *D);
54    void VisitFunctionDecl(FunctionDecl *D);
55    void VisitFriendDecl(FriendDecl *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 VisitImportDecl(ImportDecl *D);
62    void VisitStaticAssertDecl(StaticAssertDecl *D);
63    void VisitNamespaceDecl(NamespaceDecl *D);
64    void VisitUsingDirectiveDecl(UsingDirectiveDecl *D);
65    void VisitNamespaceAliasDecl(NamespaceAliasDecl *D);
66    void VisitCXXRecordDecl(CXXRecordDecl *D);
67    void VisitLinkageSpecDecl(LinkageSpecDecl *D);
68    void VisitTemplateDecl(const TemplateDecl *D);
69    void VisitFunctionTemplateDecl(FunctionTemplateDecl *D);
70    void VisitClassTemplateDecl(ClassTemplateDecl *D);
71    void VisitObjCMethodDecl(ObjCMethodDecl *D);
72    void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
73    void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
74    void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
75    void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
76    void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
77    void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
78    void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
79    void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
80    void VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D);
81    void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D);
82    void VisitUsingDecl(UsingDecl *D);
83    void VisitUsingShadowDecl(UsingShadowDecl *D);
84
85    void PrintTemplateParameters(const TemplateParameterList *Params,
86                                 const TemplateArgumentList *Args);
87    void prettyPrintAttributes(Decl *D);
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, 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 BlockPointerType *BPy = BaseType->getAs<BlockPointerType>())
111      BaseType = BPy->getPointeeType();
112    else if (const ArrayType* ATy = dyn_cast<ArrayType>(BaseType))
113      BaseType = ATy->getElementType();
114    else if (const FunctionType* FTy = BaseType->getAs<FunctionType>())
115      BaseType = FTy->getResultType();
116    else if (const VectorType *VTy = BaseType->getAs<VectorType>())
117      BaseType = VTy->getElementType();
118    else if (const ReferenceType *RTy = BaseType->getAs<ReferenceType>())
119      BaseType = RTy->getPointeeType();
120    else
121      llvm_unreachable("Unknown declarator!");
122  }
123  return BaseType;
124}
125
126static QualType getDeclType(Decl* D) {
127  if (TypedefNameDecl* TDD = dyn_cast<TypedefNameDecl>(D))
128    return TDD->getUnderlyingType();
129  if (ValueDecl* VD = dyn_cast<ValueDecl>(D))
130    return VD->getType();
131  return QualType();
132}
133
134void Decl::printGroup(Decl** Begin, unsigned NumDecls,
135                      raw_ostream &Out, const PrintingPolicy &Policy,
136                      unsigned Indentation) {
137  if (NumDecls == 1) {
138    (*Begin)->print(Out, Policy, Indentation);
139    return;
140  }
141
142  Decl** End = Begin + NumDecls;
143  TagDecl* TD = dyn_cast<TagDecl>(*Begin);
144  if (TD)
145    ++Begin;
146
147  PrintingPolicy SubPolicy(Policy);
148  if (TD && TD->isCompleteDefinition()) {
149    TD->print(Out, Policy, Indentation);
150    Out << " ";
151    SubPolicy.SuppressTag = true;
152  }
153
154  bool isFirst = true;
155  for ( ; Begin != End; ++Begin) {
156    if (isFirst) {
157      SubPolicy.SuppressSpecifiers = false;
158      isFirst = false;
159    } else {
160      if (!isFirst) Out << ", ";
161      SubPolicy.SuppressSpecifiers = true;
162    }
163
164    (*Begin)->print(Out, SubPolicy, Indentation);
165  }
166}
167
168void DeclContext::dumpDeclContext() const {
169  // Get the translation unit
170  const DeclContext *DC = this;
171  while (!DC->isTranslationUnit())
172    DC = DC->getParent();
173
174  ASTContext &Ctx = cast<TranslationUnitDecl>(DC)->getASTContext();
175  DeclPrinter Printer(llvm::errs(), Ctx.getPrintingPolicy(), 0);
176  Printer.VisitDeclContext(const_cast<DeclContext *>(this), /*Indent=*/false);
177}
178
179void Decl::dump() const {
180  dump(llvm::errs());
181}
182
183void Decl::dump(raw_ostream &Out) const {
184  PrintingPolicy Policy = getASTContext().getPrintingPolicy();
185  Policy.DumpSourceManager = &getASTContext().getSourceManager();
186  print(Out, Policy, /*Indentation*/ 0, /*PrintInstantiation*/ true);
187}
188
189raw_ostream& DeclPrinter::Indent(unsigned Indentation) {
190  for (unsigned i = 0; i != Indentation; ++i)
191    Out << "  ";
192  return Out;
193}
194
195void DeclPrinter::prettyPrintAttributes(Decl *D) {
196  if (Policy.SuppressAttributes)
197    return;
198
199  if (D->hasAttrs()) {
200    AttrVec &Attrs = D->getAttrs();
201    for (AttrVec::const_iterator i=Attrs.begin(), e=Attrs.end(); i!=e; ++i) {
202      Attr *A = *i;
203      A->printPretty(Out, Policy);
204    }
205  }
206}
207
208void DeclPrinter::ProcessDeclGroup(SmallVectorImpl<Decl*>& Decls) {
209  this->Indent();
210  Decl::printGroup(Decls.data(), Decls.size(), Out, Policy, Indentation);
211  Out << ";\n";
212  Decls.clear();
213
214}
215
216void DeclPrinter::Print(AccessSpecifier AS) {
217  switch(AS) {
218  case AS_none:      llvm_unreachable("No access specifier!");
219  case AS_public:    Out << "public"; break;
220  case AS_protected: Out << "protected"; break;
221  case AS_private:   Out << "private"; break;
222  }
223}
224
225//----------------------------------------------------------------------------
226// Common C declarations
227//----------------------------------------------------------------------------
228
229void DeclPrinter::VisitDeclContext(DeclContext *DC, bool Indent) {
230  if (Policy.TerseOutput)
231    return;
232
233  if (Indent)
234    Indentation += Policy.Indentation;
235
236  SmallVector<Decl*, 2> Decls;
237  for (DeclContext::decl_iterator D = DC->decls_begin(), DEnd = DC->decls_end();
238       D != DEnd; ++D) {
239
240    // Don't print ObjCIvarDecls, as they are printed when visiting the
241    // containing ObjCInterfaceDecl.
242    if (isa<ObjCIvarDecl>(*D))
243      continue;
244
245    if (!Policy.DumpSourceManager) {
246      // Skip over implicit declarations in pretty-printing mode.
247      if (D->isImplicit()) continue;
248      // FIXME: Ugly hack so we don't pretty-print the builtin declaration
249      // of __builtin_va_list or __[u]int128_t.  There should be some other way
250      // to check that.
251      if (NamedDecl *ND = dyn_cast<NamedDecl>(*D)) {
252        if (IdentifierInfo *II = ND->getIdentifier()) {
253          if (II->isStr("__builtin_va_list") ||
254              II->isStr("__int128_t") || II->isStr("__uint128_t"))
255            continue;
256        }
257      }
258    }
259
260    // The next bits of code handles stuff like "struct {int x;} a,b"; we're
261    // forced to merge the declarations because there's no other way to
262    // refer to the struct in question.  This limited merging is safe without
263    // a bunch of other checks because it only merges declarations directly
264    // referring to the tag, not typedefs.
265    //
266    // Check whether the current declaration should be grouped with a previous
267    // unnamed struct.
268    QualType CurDeclType = getDeclType(*D);
269    if (!Decls.empty() && !CurDeclType.isNull()) {
270      QualType BaseType = GetBaseType(CurDeclType);
271      if (!BaseType.isNull() && isa<TagType>(BaseType) &&
272          cast<TagType>(BaseType)->getDecl() == Decls[0]) {
273        Decls.push_back(*D);
274        continue;
275      }
276    }
277
278    // If we have a merged group waiting to be handled, handle it now.
279    if (!Decls.empty())
280      ProcessDeclGroup(Decls);
281
282    // If the current declaration is an unnamed tag type, save it
283    // so we can merge it with the subsequent declaration(s) using it.
284    if (isa<TagDecl>(*D) && !cast<TagDecl>(*D)->getIdentifier()) {
285      Decls.push_back(*D);
286      continue;
287    }
288
289    if (isa<AccessSpecDecl>(*D)) {
290      Indentation -= Policy.Indentation;
291      this->Indent();
292      Print(D->getAccess());
293      Out << ":\n";
294      Indentation += Policy.Indentation;
295      continue;
296    }
297
298    this->Indent();
299    Visit(*D);
300
301    // FIXME: Need to be able to tell the DeclPrinter when
302    const char *Terminator = 0;
303    if (isa<FunctionDecl>(*D) &&
304        cast<FunctionDecl>(*D)->isThisDeclarationADefinition())
305      Terminator = 0;
306    else if (isa<ObjCMethodDecl>(*D) && cast<ObjCMethodDecl>(*D)->getBody())
307      Terminator = 0;
308    else if (isa<NamespaceDecl>(*D) || isa<LinkageSpecDecl>(*D) ||
309             isa<ObjCImplementationDecl>(*D) ||
310             isa<ObjCInterfaceDecl>(*D) ||
311             isa<ObjCProtocolDecl>(*D) ||
312             isa<ObjCCategoryImplDecl>(*D) ||
313             isa<ObjCCategoryDecl>(*D))
314      Terminator = 0;
315    else if (isa<EnumConstantDecl>(*D)) {
316      DeclContext::decl_iterator Next = D;
317      ++Next;
318      if (Next != DEnd)
319        Terminator = ",";
320    } else
321      Terminator = ";";
322
323    if (Terminator)
324      Out << Terminator;
325    Out << "\n";
326  }
327
328  if (!Decls.empty())
329    ProcessDeclGroup(Decls);
330
331  if (Indent)
332    Indentation -= Policy.Indentation;
333}
334
335void DeclPrinter::VisitTranslationUnitDecl(TranslationUnitDecl *D) {
336  VisitDeclContext(D, false);
337}
338
339void DeclPrinter::VisitTypedefDecl(TypedefDecl *D) {
340  if (!Policy.SuppressSpecifiers) {
341    Out << "typedef ";
342
343    if (D->isModulePrivate())
344      Out << "__module_private__ ";
345  }
346  D->getUnderlyingType().print(Out, Policy, D->getName());
347  prettyPrintAttributes(D);
348}
349
350void DeclPrinter::VisitTypeAliasDecl(TypeAliasDecl *D) {
351  Out << "using " << *D << " = " << D->getUnderlyingType().getAsString(Policy);
352}
353
354void DeclPrinter::VisitEnumDecl(EnumDecl *D) {
355  if (!Policy.SuppressSpecifiers && D->isModulePrivate())
356    Out << "__module_private__ ";
357  Out << "enum ";
358  if (D->isScoped()) {
359    if (D->isScopedUsingClassTag())
360      Out << "class ";
361    else
362      Out << "struct ";
363  }
364  Out << *D;
365
366  if (D->isFixed())
367    Out << " : " << D->getIntegerType().stream(Policy);
368
369  if (D->isCompleteDefinition()) {
370    Out << " {\n";
371    VisitDeclContext(D);
372    Indent() << "}";
373  }
374  prettyPrintAttributes(D);
375}
376
377void DeclPrinter::VisitRecordDecl(RecordDecl *D) {
378  if (!Policy.SuppressSpecifiers && D->isModulePrivate())
379    Out << "__module_private__ ";
380  Out << D->getKindName();
381  if (D->getIdentifier())
382    Out << ' ' << *D;
383
384  if (D->isCompleteDefinition()) {
385    Out << " {\n";
386    VisitDeclContext(D);
387    Indent() << "}";
388  }
389}
390
391void DeclPrinter::VisitEnumConstantDecl(EnumConstantDecl *D) {
392  Out << *D;
393  if (Expr *Init = D->getInitExpr()) {
394    Out << " = ";
395    Init->printPretty(Out, 0, Policy, Indentation);
396  }
397}
398
399void DeclPrinter::VisitFunctionDecl(FunctionDecl *D) {
400  if (!Policy.SuppressSpecifiers) {
401    switch (D->getStorageClassAsWritten()) {
402    case SC_None: break;
403    case SC_Extern: Out << "extern "; break;
404    case SC_Static: Out << "static "; break;
405    case SC_PrivateExtern: Out << "__private_extern__ "; break;
406    case SC_Auto: case SC_Register: case SC_OpenCLWorkGroupLocal:
407      llvm_unreachable("invalid for functions");
408    }
409
410    if (D->isInlineSpecified())  Out << "inline ";
411    if (D->isVirtualAsWritten()) Out << "virtual ";
412    if (D->isModulePrivate())    Out << "__module_private__ ";
413  }
414
415  PrintingPolicy SubPolicy(Policy);
416  SubPolicy.SuppressSpecifiers = false;
417  std::string Proto = D->getNameInfo().getAsString();
418
419  QualType Ty = D->getType();
420  while (const ParenType *PT = dyn_cast<ParenType>(Ty)) {
421    Proto = '(' + Proto + ')';
422    Ty = PT->getInnerType();
423  }
424
425  if (isa<FunctionType>(Ty)) {
426    const FunctionType *AFT = Ty->getAs<FunctionType>();
427    const FunctionProtoType *FT = 0;
428    if (D->hasWrittenPrototype())
429      FT = dyn_cast<FunctionProtoType>(AFT);
430
431    Proto += "(";
432    if (FT) {
433      llvm::raw_string_ostream POut(Proto);
434      DeclPrinter ParamPrinter(POut, SubPolicy, Indentation);
435      for (unsigned i = 0, e = D->getNumParams(); i != e; ++i) {
436        if (i) POut << ", ";
437        ParamPrinter.VisitParmVarDecl(D->getParamDecl(i));
438      }
439
440      if (FT->isVariadic()) {
441        if (D->getNumParams()) POut << ", ";
442        POut << "...";
443      }
444    } else if (D->doesThisDeclarationHaveABody() && !D->hasPrototype()) {
445      for (unsigned i = 0, e = D->getNumParams(); i != e; ++i) {
446        if (i)
447          Proto += ", ";
448        Proto += D->getParamDecl(i)->getNameAsString();
449      }
450    }
451
452    Proto += ")";
453
454    if (FT) {
455      if (FT->isConst())
456        Proto += " const";
457      if (FT->isVolatile())
458        Proto += " volatile";
459      if (FT->isRestrict())
460        Proto += " restrict";
461    }
462
463    if (FT && FT->hasDynamicExceptionSpec()) {
464      Proto += " throw(";
465      if (FT->getExceptionSpecType() == EST_MSAny)
466        Proto += "...";
467      else
468        for (unsigned I = 0, N = FT->getNumExceptions(); I != N; ++I) {
469          if (I)
470            Proto += ", ";
471
472          Proto += FT->getExceptionType(I).getAsString(SubPolicy);
473        }
474      Proto += ")";
475    } else if (FT && isNoexceptExceptionSpec(FT->getExceptionSpecType())) {
476      Proto += " noexcept";
477      if (FT->getExceptionSpecType() == EST_ComputedNoexcept) {
478        Proto += "(";
479        llvm::raw_string_ostream EOut(Proto);
480        FT->getNoexceptExpr()->printPretty(EOut, 0, SubPolicy,
481                                           Indentation);
482        EOut.flush();
483        Proto += EOut.str();
484        Proto += ")";
485      }
486    }
487
488    if (CXXConstructorDecl *CDecl = dyn_cast<CXXConstructorDecl>(D)) {
489      bool HasInitializerList = false;
490      for (CXXConstructorDecl::init_const_iterator B = CDecl->init_begin(),
491           E = CDecl->init_end();
492           B != E; ++B) {
493        CXXCtorInitializer * BMInitializer = (*B);
494        if (BMInitializer->isInClassMemberInitializer())
495          continue;
496
497        if (!HasInitializerList) {
498          Proto += " : ";
499          Out << Proto;
500          Proto.clear();
501          HasInitializerList = true;
502        } else
503          Out << ", ";
504
505        if (BMInitializer->isAnyMemberInitializer()) {
506          FieldDecl *FD = BMInitializer->getAnyMember();
507          Out << *FD;
508        } else {
509          Out << QualType(BMInitializer->getBaseClass(), 0).getAsString(Policy);
510        }
511
512        Out << "(";
513        if (!BMInitializer->getInit()) {
514          // Nothing to print
515        } else {
516          Expr *Init = BMInitializer->getInit();
517          if (ExprWithCleanups *Tmp = dyn_cast<ExprWithCleanups>(Init))
518            Init = Tmp->getSubExpr();
519
520          Init = Init->IgnoreParens();
521
522          Expr *SimpleInit = 0;
523          Expr **Args = 0;
524          unsigned NumArgs = 0;
525          if (ParenListExpr *ParenList = dyn_cast<ParenListExpr>(Init)) {
526            Args = ParenList->getExprs();
527            NumArgs = ParenList->getNumExprs();
528          } else if (CXXConstructExpr *Construct
529                                        = dyn_cast<CXXConstructExpr>(Init)) {
530            Args = Construct->getArgs();
531            NumArgs = Construct->getNumArgs();
532          } else
533            SimpleInit = Init;
534
535          if (SimpleInit)
536            SimpleInit->printPretty(Out, 0, Policy, Indentation);
537          else {
538            for (unsigned I = 0; I != NumArgs; ++I) {
539              if (isa<CXXDefaultArgExpr>(Args[I]))
540                break;
541
542              if (I)
543                Out << ", ";
544              Args[I]->printPretty(Out, 0, Policy, Indentation);
545            }
546          }
547        }
548        Out << ")";
549      }
550    }
551    else
552      AFT->getResultType().print(Out, Policy, Proto);
553  } else {
554    Ty.print(Out, Policy, Proto);
555  }
556
557  prettyPrintAttributes(D);
558
559  if (D->isPure())
560    Out << " = 0";
561  else if (D->isDeletedAsWritten())
562    Out << " = delete";
563  else if (D->doesThisDeclarationHaveABody() && !Policy.TerseOutput) {
564    if (!D->hasPrototype() && D->getNumParams()) {
565      // This is a K&R function definition, so we need to print the
566      // parameters.
567      Out << '\n';
568      DeclPrinter ParamPrinter(Out, SubPolicy, Indentation);
569      Indentation += Policy.Indentation;
570      for (unsigned i = 0, e = D->getNumParams(); i != e; ++i) {
571        Indent();
572        ParamPrinter.VisitParmVarDecl(D->getParamDecl(i));
573        Out << ";\n";
574      }
575      Indentation -= Policy.Indentation;
576    } else
577      Out << ' ';
578
579    D->getBody()->printPretty(Out, 0, SubPolicy, Indentation);
580    Out << '\n';
581  }
582}
583
584void DeclPrinter::VisitFriendDecl(FriendDecl *D) {
585  if (TypeSourceInfo *TSI = D->getFriendType()) {
586    if (CXXRecordDecl *FriendD = TSI->getType()->getAsCXXRecordDecl()) {
587      Out << "friend ";
588      VisitCXXRecordDecl(FriendD);
589    }
590  }
591  else if (FunctionDecl *FD =
592      dyn_cast<FunctionDecl>(D->getFriendDecl())) {
593    Out << "friend ";
594    VisitFunctionDecl(FD);
595  }
596  else if (FunctionTemplateDecl *FTD =
597           dyn_cast<FunctionTemplateDecl>(D->getFriendDecl())) {
598    Out << "friend ";
599    VisitFunctionTemplateDecl(FTD);
600  }
601  else if (ClassTemplateDecl *CTD =
602           dyn_cast<ClassTemplateDecl>(D->getFriendDecl())) {
603    Out << "friend ";
604    VisitClassTemplateDecl(CTD);
605  }
606}
607
608void DeclPrinter::VisitFieldDecl(FieldDecl *D) {
609  if (!Policy.SuppressSpecifiers && D->isMutable())
610    Out << "mutable ";
611  if (!Policy.SuppressSpecifiers && D->isModulePrivate())
612    Out << "__module_private__ ";
613
614  Out << D->getType().stream(Policy, D->getName());
615
616  if (D->isBitField()) {
617    Out << " : ";
618    D->getBitWidth()->printPretty(Out, 0, Policy, Indentation);
619  }
620
621  Expr *Init = D->getInClassInitializer();
622  if (!Policy.SuppressInitializers && Init) {
623    if (D->getInClassInitStyle() == ICIS_ListInit)
624      Out << " ";
625    else
626      Out << " = ";
627    Init->printPretty(Out, 0, Policy, Indentation);
628  }
629  prettyPrintAttributes(D);
630}
631
632void DeclPrinter::VisitLabelDecl(LabelDecl *D) {
633  Out << *D << ":";
634}
635
636
637void DeclPrinter::VisitVarDecl(VarDecl *D) {
638  StorageClass SCAsWritten = D->getStorageClassAsWritten();
639  if (!Policy.SuppressSpecifiers && SCAsWritten != SC_None)
640    Out << VarDecl::getStorageClassSpecifierString(SCAsWritten) << " ";
641
642  if (!Policy.SuppressSpecifiers && D->isThreadSpecified())
643    Out << "__thread ";
644  if (!Policy.SuppressSpecifiers && D->isModulePrivate())
645    Out << "__module_private__ ";
646
647  QualType T = D->getType();
648  if (ParmVarDecl *Parm = dyn_cast<ParmVarDecl>(D))
649    T = Parm->getOriginalType();
650  T.print(Out, Policy, D->getName());
651  Expr *Init = D->getInit();
652  if (!Policy.SuppressInitializers && Init) {
653    bool ImplicitInit = false;
654    if (CXXConstructExpr *Construct = dyn_cast<CXXConstructExpr>(Init))
655      ImplicitInit = D->getInitStyle() == VarDecl::CallInit &&
656          Construct->getNumArgs() == 0 && !Construct->isListInitialization();
657    if (!ImplicitInit) {
658      if ((D->getInitStyle() == VarDecl::CallInit) && !isa<ParenListExpr>(Init))
659        Out << "(";
660      else if (D->getInitStyle() == VarDecl::CInit) {
661        Out << " = ";
662      }
663      Init->printPretty(Out, 0, Policy, Indentation);
664      if ((D->getInitStyle() == VarDecl::CallInit) && !isa<ParenListExpr>(Init))
665        Out << ")";
666    }
667  }
668  prettyPrintAttributes(D);
669}
670
671void DeclPrinter::VisitParmVarDecl(ParmVarDecl *D) {
672  VisitVarDecl(D);
673}
674
675void DeclPrinter::VisitFileScopeAsmDecl(FileScopeAsmDecl *D) {
676  Out << "__asm (";
677  D->getAsmString()->printPretty(Out, 0, Policy, Indentation);
678  Out << ")";
679}
680
681void DeclPrinter::VisitImportDecl(ImportDecl *D) {
682  Out << "@__experimental_modules_import " << D->getImportedModule()->getFullModuleName()
683      << ";\n";
684}
685
686void DeclPrinter::VisitStaticAssertDecl(StaticAssertDecl *D) {
687  Out << "static_assert(";
688  D->getAssertExpr()->printPretty(Out, 0, Policy, Indentation);
689  Out << ", ";
690  D->getMessage()->printPretty(Out, 0, Policy, Indentation);
691  Out << ")";
692}
693
694//----------------------------------------------------------------------------
695// C++ declarations
696//----------------------------------------------------------------------------
697void DeclPrinter::VisitNamespaceDecl(NamespaceDecl *D) {
698  if (D->isInline())
699    Out << "inline ";
700  Out << "namespace " << *D << " {\n";
701  VisitDeclContext(D);
702  Indent() << "}";
703}
704
705void DeclPrinter::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
706  Out << "using namespace ";
707  if (D->getQualifier())
708    D->getQualifier()->print(Out, Policy);
709  Out << *D->getNominatedNamespaceAsWritten();
710}
711
712void DeclPrinter::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
713  Out << "namespace " << *D << " = ";
714  if (D->getQualifier())
715    D->getQualifier()->print(Out, Policy);
716  Out << *D->getAliasedNamespace();
717}
718
719void DeclPrinter::VisitCXXRecordDecl(CXXRecordDecl *D) {
720  if (!Policy.SuppressSpecifiers && D->isModulePrivate())
721    Out << "__module_private__ ";
722  Out << D->getKindName();
723  if (D->getIdentifier())
724    Out << ' ' << *D;
725
726  if (D->isCompleteDefinition()) {
727    // Print the base classes
728    if (D->getNumBases()) {
729      Out << " : ";
730      for (CXXRecordDecl::base_class_iterator Base = D->bases_begin(),
731             BaseEnd = D->bases_end(); Base != BaseEnd; ++Base) {
732        if (Base != D->bases_begin())
733          Out << ", ";
734
735        if (Base->isVirtual())
736          Out << "virtual ";
737
738        AccessSpecifier AS = Base->getAccessSpecifierAsWritten();
739        if (AS != AS_none)
740          Print(AS);
741        Out << " " << Base->getType().getAsString(Policy);
742
743        if (Base->isPackExpansion())
744          Out << "...";
745      }
746    }
747
748    // Print the class definition
749    // FIXME: Doesn't print access specifiers, e.g., "public:"
750    Out << " {\n";
751    VisitDeclContext(D);
752    Indent() << "}";
753  }
754}
755
756void DeclPrinter::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
757  const char *l;
758  if (D->getLanguage() == LinkageSpecDecl::lang_c)
759    l = "C";
760  else {
761    assert(D->getLanguage() == LinkageSpecDecl::lang_cxx &&
762           "unknown language in linkage specification");
763    l = "C++";
764  }
765
766  Out << "extern \"" << l << "\" ";
767  if (D->hasBraces()) {
768    Out << "{\n";
769    VisitDeclContext(D);
770    Indent() << "}";
771  } else
772    Visit(*D->decls_begin());
773}
774
775void DeclPrinter::PrintTemplateParameters(
776    const TemplateParameterList *Params, const TemplateArgumentList *Args = 0) {
777  assert(Params);
778  assert(!Args || Params->size() == Args->size());
779
780  Out << "template <";
781
782  for (unsigned i = 0, e = Params->size(); i != e; ++i) {
783    if (i != 0)
784      Out << ", ";
785
786    const Decl *Param = Params->getParam(i);
787    if (const TemplateTypeParmDecl *TTP =
788          dyn_cast<TemplateTypeParmDecl>(Param)) {
789
790      if (TTP->wasDeclaredWithTypename())
791        Out << "typename ";
792      else
793        Out << "class ";
794
795      if (TTP->isParameterPack())
796        Out << "... ";
797
798      Out << *TTP;
799
800      if (Args) {
801        Out << " = ";
802        Args->get(i).print(Policy, Out);
803      } else if (TTP->hasDefaultArgument()) {
804        Out << " = ";
805        Out << TTP->getDefaultArgument().getAsString(Policy);
806      };
807    } else if (const NonTypeTemplateParmDecl *NTTP =
808                 dyn_cast<NonTypeTemplateParmDecl>(Param)) {
809      Out << NTTP->getType().getAsString(Policy);
810
811      if (NTTP->isParameterPack() && !isa<PackExpansionType>(NTTP->getType()))
812        Out << "...";
813
814      if (IdentifierInfo *Name = NTTP->getIdentifier()) {
815        Out << ' ';
816        Out << Name->getName();
817      }
818
819      if (Args) {
820        Out << " = ";
821        Args->get(i).print(Policy, Out);
822      } else if (NTTP->hasDefaultArgument()) {
823        Out << " = ";
824        NTTP->getDefaultArgument()->printPretty(Out, 0, Policy, Indentation);
825      }
826    } else if (const TemplateTemplateParmDecl *TTPD =
827                 dyn_cast<TemplateTemplateParmDecl>(Param)) {
828      VisitTemplateDecl(TTPD);
829      // FIXME: print the default argument, if present.
830    }
831  }
832
833  Out << "> ";
834}
835
836void DeclPrinter::VisitTemplateDecl(const TemplateDecl *D) {
837  PrintTemplateParameters(D->getTemplateParameters());
838
839  if (const TemplateTemplateParmDecl *TTP =
840        dyn_cast<TemplateTemplateParmDecl>(D)) {
841    Out << "class ";
842    if (TTP->isParameterPack())
843      Out << "...";
844    Out << D->getName();
845  } else {
846    Visit(D->getTemplatedDecl());
847  }
848}
849
850void DeclPrinter::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
851  if (PrintInstantiation) {
852    TemplateParameterList *Params = D->getTemplateParameters();
853    for (FunctionTemplateDecl::spec_iterator I = D->spec_begin(), E = D->spec_end();
854         I != E; ++I) {
855      PrintTemplateParameters(Params, (*I)->getTemplateSpecializationArgs());
856      Visit(*I);
857    }
858  }
859
860  return VisitRedeclarableTemplateDecl(D);
861}
862
863void DeclPrinter::VisitClassTemplateDecl(ClassTemplateDecl *D) {
864  if (PrintInstantiation) {
865    TemplateParameterList *Params = D->getTemplateParameters();
866    for (ClassTemplateDecl::spec_iterator I = D->spec_begin(), E = D->spec_end();
867         I != E; ++I) {
868      PrintTemplateParameters(Params, &(*I)->getTemplateArgs());
869      Visit(*I);
870      Out << '\n';
871    }
872  }
873
874  return VisitRedeclarableTemplateDecl(D);
875}
876
877//----------------------------------------------------------------------------
878// Objective-C declarations
879//----------------------------------------------------------------------------
880
881void DeclPrinter::VisitObjCMethodDecl(ObjCMethodDecl *OMD) {
882  if (OMD->isInstanceMethod())
883    Out << "- ";
884  else
885    Out << "+ ";
886  if (!OMD->getResultType().isNull())
887    Out << '(' << OMD->getResultType().getAsString(Policy) << ")";
888
889  std::string name = OMD->getSelector().getAsString();
890  std::string::size_type pos, lastPos = 0;
891  for (ObjCMethodDecl::param_iterator PI = OMD->param_begin(),
892       E = OMD->param_end(); PI != E; ++PI) {
893    // FIXME: selector is missing here!
894    pos = name.find_first_of(':', lastPos);
895    Out << " " << name.substr(lastPos, pos - lastPos);
896    Out << ":(" << (*PI)->getType().getAsString(Policy) << ')' << **PI;
897    lastPos = pos + 1;
898  }
899
900  if (OMD->param_begin() == OMD->param_end())
901    Out << " " << name;
902
903  if (OMD->isVariadic())
904      Out << ", ...";
905
906  if (OMD->getBody() && !Policy.TerseOutput) {
907    Out << ' ';
908    OMD->getBody()->printPretty(Out, 0, Policy);
909    Out << '\n';
910  }
911}
912
913void DeclPrinter::VisitObjCImplementationDecl(ObjCImplementationDecl *OID) {
914  std::string I = OID->getNameAsString();
915  ObjCInterfaceDecl *SID = OID->getSuperClass();
916
917  if (SID)
918    Out << "@implementation " << I << " : " << *SID;
919  else
920    Out << "@implementation " << I;
921
922  if (OID->ivar_size() > 0) {
923    Out << "{\n";
924    Indentation += Policy.Indentation;
925    for (ObjCImplementationDecl::ivar_iterator I = OID->ivar_begin(),
926         E = OID->ivar_end(); I != E; ++I) {
927      Indent() << I->getType().getAsString(Policy) << ' ' << **I << ";\n";
928    }
929    Indentation -= Policy.Indentation;
930    Out << "}\n";
931  }
932  VisitDeclContext(OID, false);
933  Out << "@end";
934}
935
936void DeclPrinter::VisitObjCInterfaceDecl(ObjCInterfaceDecl *OID) {
937  std::string I = OID->getNameAsString();
938  ObjCInterfaceDecl *SID = OID->getSuperClass();
939
940  if (!OID->isThisDeclarationADefinition()) {
941    Out << "@class " << I << ";";
942    return;
943  }
944
945  if (SID)
946    Out << "@interface " << I << " : " << *SID;
947  else
948    Out << "@interface " << I;
949
950  // Protocols?
951  const ObjCList<ObjCProtocolDecl> &Protocols = OID->getReferencedProtocols();
952  if (!Protocols.empty()) {
953    for (ObjCList<ObjCProtocolDecl>::iterator I = Protocols.begin(),
954         E = Protocols.end(); I != E; ++I)
955      Out << (I == Protocols.begin() ? '<' : ',') << **I;
956  }
957
958  if (!Protocols.empty())
959    Out << "> ";
960
961  if (OID->ivar_size() > 0) {
962    Out << "{\n";
963    Indentation += Policy.Indentation;
964    for (ObjCInterfaceDecl::ivar_iterator I = OID->ivar_begin(),
965         E = OID->ivar_end(); I != E; ++I) {
966      Indent() << I->getType().getAsString(Policy) << ' ' << **I << ";\n";
967    }
968    Indentation -= Policy.Indentation;
969    Out << "}\n";
970  }
971
972  VisitDeclContext(OID, false);
973  Out << "@end";
974  // FIXME: implement the rest...
975}
976
977void DeclPrinter::VisitObjCProtocolDecl(ObjCProtocolDecl *PID) {
978  if (!PID->isThisDeclarationADefinition()) {
979    Out << "@protocol " << PID->getIdentifier() << ";\n";
980    return;
981  }
982
983  Out << "@protocol " << *PID << '\n';
984  VisitDeclContext(PID, false);
985  Out << "@end";
986}
987
988void DeclPrinter::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *PID) {
989  Out << "@implementation " << *PID->getClassInterface() << '(' << *PID <<")\n";
990
991  VisitDeclContext(PID, false);
992  Out << "@end";
993  // FIXME: implement the rest...
994}
995
996void DeclPrinter::VisitObjCCategoryDecl(ObjCCategoryDecl *PID) {
997  Out << "@interface " << *PID->getClassInterface() << '(' << *PID << ")\n";
998  if (PID->ivar_size() > 0) {
999    Out << "{\n";
1000    Indentation += Policy.Indentation;
1001    for (ObjCCategoryDecl::ivar_iterator I = PID->ivar_begin(),
1002         E = PID->ivar_end(); I != E; ++I) {
1003      Indent() << I->getType().getAsString(Policy) << ' ' << **I << ";\n";
1004    }
1005    Indentation -= Policy.Indentation;
1006    Out << "}\n";
1007  }
1008
1009  VisitDeclContext(PID, false);
1010  Out << "@end";
1011
1012  // FIXME: implement the rest...
1013}
1014
1015void DeclPrinter::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *AID) {
1016  Out << "@compatibility_alias " << *AID
1017      << ' ' << *AID->getClassInterface() << ";\n";
1018}
1019
1020/// PrintObjCPropertyDecl - print a property declaration.
1021///
1022void DeclPrinter::VisitObjCPropertyDecl(ObjCPropertyDecl *PDecl) {
1023  if (PDecl->getPropertyImplementation() == ObjCPropertyDecl::Required)
1024    Out << "@required\n";
1025  else if (PDecl->getPropertyImplementation() == ObjCPropertyDecl::Optional)
1026    Out << "@optional\n";
1027
1028  Out << "@property";
1029  if (PDecl->getPropertyAttributes() != ObjCPropertyDecl::OBJC_PR_noattr) {
1030    bool first = true;
1031    Out << " (";
1032    if (PDecl->getPropertyAttributes() &
1033        ObjCPropertyDecl::OBJC_PR_readonly) {
1034      Out << (first ? ' ' : ',') << "readonly";
1035      first = false;
1036    }
1037
1038    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) {
1039      Out << (first ? ' ' : ',') << "getter = "
1040          << PDecl->getGetterName().getAsString();
1041      first = false;
1042    }
1043    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) {
1044      Out << (first ? ' ' : ',') << "setter = "
1045          << PDecl->getSetterName().getAsString();
1046      first = false;
1047    }
1048
1049    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_assign) {
1050      Out << (first ? ' ' : ',') << "assign";
1051      first = false;
1052    }
1053
1054    if (PDecl->getPropertyAttributes() &
1055        ObjCPropertyDecl::OBJC_PR_readwrite) {
1056      Out << (first ? ' ' : ',') << "readwrite";
1057      first = false;
1058    }
1059
1060    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_retain) {
1061      Out << (first ? ' ' : ',') << "retain";
1062      first = false;
1063    }
1064
1065    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_strong) {
1066      Out << (first ? ' ' : ',') << "strong";
1067      first = false;
1068    }
1069
1070    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_copy) {
1071      Out << (first ? ' ' : ',') << "copy";
1072      first = false;
1073    }
1074
1075    if (PDecl->getPropertyAttributes() &
1076        ObjCPropertyDecl::OBJC_PR_nonatomic) {
1077      Out << (first ? ' ' : ',') << "nonatomic";
1078      first = false;
1079    }
1080    if (PDecl->getPropertyAttributes() &
1081        ObjCPropertyDecl::OBJC_PR_atomic) {
1082      Out << (first ? ' ' : ',') << "atomic";
1083      first = false;
1084    }
1085
1086    (void) first; // Silence dead store warning due to idiomatic code.
1087    Out << " )";
1088  }
1089  Out << ' ' << PDecl->getType().getAsString(Policy) << ' ' << *PDecl;
1090}
1091
1092void DeclPrinter::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *PID) {
1093  if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize)
1094    Out << "@synthesize ";
1095  else
1096    Out << "@dynamic ";
1097  Out << *PID->getPropertyDecl();
1098  if (PID->getPropertyIvarDecl())
1099    Out << '=' << *PID->getPropertyIvarDecl();
1100}
1101
1102void DeclPrinter::VisitUsingDecl(UsingDecl *D) {
1103  Out << "using ";
1104  D->getQualifier()->print(Out, Policy);
1105  Out << *D;
1106}
1107
1108void
1109DeclPrinter::VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D) {
1110  Out << "using typename ";
1111  D->getQualifier()->print(Out, Policy);
1112  Out << D->getDeclName();
1113}
1114
1115void DeclPrinter::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
1116  Out << "using ";
1117  D->getQualifier()->print(Out, Policy);
1118  Out << D->getDeclName();
1119}
1120
1121void DeclPrinter::VisitUsingShadowDecl(UsingShadowDecl *D) {
1122  // ignore
1123}
1124