DeclPrinter.cpp revision d1fc82efd53ffda30f4f16041399d78f3bf0705f 
1//===--- DeclPrinter.cpp - Printing implementation for Decl ASTs ----------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file implements the Decl::dump method, which pretty print the
11// AST back out to C/Objective-C/C++/Objective-C++ code.
12//
13//===----------------------------------------------------------------------===//
14#include "clang/AST/ASTContext.h"
15#include "clang/AST/DeclVisitor.h"
16#include "clang/AST/Decl.h"
17#include "clang/AST/DeclCXX.h"
18#include "clang/AST/DeclObjC.h"
19#include "clang/AST/Expr.h"
20#include "clang/AST/ExprCXX.h"
21#include "clang/AST/PrettyPrinter.h"
22#include "clang/Basic/Module.h"
23#include "llvm/Support/raw_ostream.h"
24using namespace clang;
25
26namespace {
27  class DeclPrinter : public DeclVisitor<DeclPrinter> {
28    raw_ostream &Out;
29    PrintingPolicy Policy;
30    unsigned Indentation;
31    bool PrintInstantiation;
32
33    raw_ostream& Indent() { return Indent(Indentation); }
34    raw_ostream& Indent(unsigned Indentation);
35    void ProcessDeclGroup(SmallVectorImpl<Decl*>& Decls);
36
37    void Print(AccessSpecifier AS);
38
39  public:
40    DeclPrinter(raw_ostream &Out, const PrintingPolicy &Policy,
41                unsigned Indentation = 0, bool PrintInstantiation = false)
42      : Out(Out), Policy(Policy), Indentation(Indentation),
43        PrintInstantiation(PrintInstantiation) { }
44
45    void VisitDeclContext(DeclContext *DC, bool Indent = true);
46
47    void VisitTranslationUnitDecl(TranslationUnitDecl *D);
48    void VisitTypedefDecl(TypedefDecl *D);
49    void VisitTypeAliasDecl(TypeAliasDecl *D);
50    void VisitEnumDecl(EnumDecl *D);
51    void VisitRecordDecl(RecordDecl *D);
52    void VisitEnumConstantDecl(EnumConstantDecl *D);
53    void VisitFunctionDecl(FunctionDecl *D);
54    void VisitFieldDecl(FieldDecl *D);
55    void VisitVarDecl(VarDecl *D);
56    void VisitLabelDecl(LabelDecl *D);
57    void VisitParmVarDecl(ParmVarDecl *D);
58    void VisitFileScopeAsmDecl(FileScopeAsmDecl *D);
59    void VisitImportDecl(ImportDecl *D);
60    void VisitStaticAssertDecl(StaticAssertDecl *D);
61    void VisitNamespaceDecl(NamespaceDecl *D);
62    void VisitUsingDirectiveDecl(UsingDirectiveDecl *D);
63    void VisitNamespaceAliasDecl(NamespaceAliasDecl *D);
64    void VisitCXXRecordDecl(CXXRecordDecl *D);
65    void VisitLinkageSpecDecl(LinkageSpecDecl *D);
66    void VisitTemplateDecl(const TemplateDecl *D);
67    void VisitFunctionTemplateDecl(FunctionTemplateDecl *D);
68    void VisitClassTemplateDecl(ClassTemplateDecl *D);
69    void VisitObjCMethodDecl(ObjCMethodDecl *D);
70    void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
71    void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
72    void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
73    void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
74    void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
75    void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
76    void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
77    void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
78    void VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D);
79    void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D);
80    void VisitUsingDecl(UsingDecl *D);
81    void VisitUsingShadowDecl(UsingShadowDecl *D);
82
83    void PrintTemplateParameters(const TemplateParameterList *Params,
84                                 const TemplateArgumentList *Args);
85    void prettyPrintAttributes(Decl *D);
86  };
87}
88
89void Decl::print(raw_ostream &Out, unsigned Indentation,
90                 bool PrintInstantiation) const {
91  print(Out, getASTContext().getPrintingPolicy(), Indentation, PrintInstantiation);
92}
93
94void Decl::print(raw_ostream &Out, const PrintingPolicy &Policy,
95                 unsigned Indentation, bool PrintInstantiation) const {
96  DeclPrinter Printer(Out, Policy, Indentation, PrintInstantiation);
97  Printer.Visit(const_cast<Decl*>(this));
98}
99
100static QualType GetBaseType(QualType T) {
101  // FIXME: This should be on the Type class!
102  QualType BaseType = T;
103  while (!BaseType->isSpecifierType()) {
104    if (isa<TypedefType>(BaseType))
105      break;
106    else if (const PointerType* PTy = BaseType->getAs<PointerType>())
107      BaseType = PTy->getPointeeType();
108    else if (const ArrayType* ATy = dyn_cast<ArrayType>(BaseType))
109      BaseType = ATy->getElementType();
110    else if (const FunctionType* FTy = BaseType->getAs<FunctionType>())
111      BaseType = FTy->getResultType();
112    else if (const VectorType *VTy = BaseType->getAs<VectorType>())
113      BaseType = VTy->getElementType();
114    else if (const ReferenceType *RTy = BaseType->getAs<ReferenceType>())
115      BaseType = RTy->getPointeeType();
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.getPrintingPolicy(), 0);
172  Printer.VisitDeclContext(const_cast<DeclContext *>(this), /*Indent=*/false);
173}
174
175void Decl::dump() const {
176  dump(llvm::errs());
177}
178
179void Decl::dump(raw_ostream &Out) const {
180  PrintingPolicy Policy = getASTContext().getPrintingPolicy();
181  Policy.DumpSourceManager = &getASTContext().getSourceManager();
182  print(Out, Policy, /*Indentation*/ 0, /*PrintInstantiation*/ true);
183}
184
185raw_ostream& DeclPrinter::Indent(unsigned Indentation) {
186  for (unsigned i = 0; i != Indentation; ++i)
187    Out << "  ";
188  return Out;
189}
190
191void DeclPrinter::prettyPrintAttributes(Decl *D) {
192  if (D->hasAttrs()) {
193    AttrVec &Attrs = D->getAttrs();
194    for (AttrVec::const_iterator i=Attrs.begin(), e=Attrs.end(); i!=e; ++i) {
195      Attr *A = *i;
196      A->printPretty(Out, Policy);
197    }
198  }
199}
200
201void DeclPrinter::ProcessDeclGroup(SmallVectorImpl<Decl*>& Decls) {
202  this->Indent();
203  Decl::printGroup(Decls.data(), Decls.size(), Out, Policy, Indentation);
204  Out << ";\n";
205  Decls.clear();
206
207}
208
209void DeclPrinter::Print(AccessSpecifier AS) {
210  switch(AS) {
211  case AS_none:      llvm_unreachable("No access specifier!");
212  case AS_public:    Out << "public"; break;
213  case AS_protected: Out << "protected"; break;
214  case AS_private:   Out << "private"; break;
215  }
216}
217
218//----------------------------------------------------------------------------
219// Common C declarations
220//----------------------------------------------------------------------------
221
222void DeclPrinter::VisitDeclContext(DeclContext *DC, bool Indent) {
223  if (Policy.TerseOutput)
224    return;
225
226  if (Indent)
227    Indentation += Policy.Indentation;
228
229  SmallVector<Decl*, 2> Decls;
230  for (DeclContext::decl_iterator D = DC->decls_begin(), DEnd = DC->decls_end();
231       D != DEnd; ++D) {
232
233    // Don't print ObjCIvarDecls, as they are printed when visiting the
234    // containing ObjCInterfaceDecl.
235    if (isa<ObjCIvarDecl>(*D))
236      continue;
237
238    if (!Policy.DumpSourceManager) {
239      // Skip over implicit declarations in pretty-printing mode.
240      if (D->isImplicit()) continue;
241      // FIXME: Ugly hack so we don't pretty-print the builtin declaration
242      // of __builtin_va_list or __[u]int128_t.  There should be some other way
243      // to check that.
244      if (NamedDecl *ND = dyn_cast<NamedDecl>(*D)) {
245        if (IdentifierInfo *II = ND->getIdentifier()) {
246          if (II->isStr("__builtin_va_list") ||
247              II->isStr("__int128_t") || II->isStr("__uint128_t"))
248            continue;
249        }
250      }
251    }
252
253    // The next bits of code handles stuff like "struct {int x;} a,b"; we're
254    // forced to merge the declarations because there's no other way to
255    // refer to the struct in question.  This limited merging is safe without
256    // a bunch of other checks because it only merges declarations directly
257    // referring to the tag, not typedefs.
258    //
259    // Check whether the current declaration should be grouped with a previous
260    // unnamed struct.
261    QualType CurDeclType = getDeclType(*D);
262    if (!Decls.empty() && !CurDeclType.isNull()) {
263      QualType BaseType = GetBaseType(CurDeclType);
264      if (!BaseType.isNull() && isa<TagType>(BaseType) &&
265          cast<TagType>(BaseType)->getDecl() == Decls[0]) {
266        Decls.push_back(*D);
267        continue;
268      }
269    }
270
271    // If we have a merged group waiting to be handled, handle it now.
272    if (!Decls.empty())
273      ProcessDeclGroup(Decls);
274
275    // If the current declaration is an unnamed tag type, save it
276    // so we can merge it with the subsequent declaration(s) using it.
277    if (isa<TagDecl>(*D) && !cast<TagDecl>(*D)->getIdentifier()) {
278      Decls.push_back(*D);
279      continue;
280    }
281
282    if (isa<AccessSpecDecl>(*D)) {
283      Indentation -= Policy.Indentation;
284      this->Indent();
285      Print(D->getAccess());
286      Out << ":\n";
287      Indentation += Policy.Indentation;
288      continue;
289    }
290
291    this->Indent();
292    Visit(*D);
293
294    // FIXME: Need to be able to tell the DeclPrinter when
295    const char *Terminator = 0;
296    if (isa<FunctionDecl>(*D) &&
297        cast<FunctionDecl>(*D)->isThisDeclarationADefinition())
298      Terminator = 0;
299    else if (isa<ObjCMethodDecl>(*D) && cast<ObjCMethodDecl>(*D)->getBody())
300      Terminator = 0;
301    else if (isa<NamespaceDecl>(*D) || isa<LinkageSpecDecl>(*D) ||
302             isa<ObjCImplementationDecl>(*D) ||
303             isa<ObjCInterfaceDecl>(*D) ||
304             isa<ObjCProtocolDecl>(*D) ||
305             isa<ObjCCategoryImplDecl>(*D) ||
306             isa<ObjCCategoryDecl>(*D))
307      Terminator = 0;
308    else if (isa<EnumConstantDecl>(*D)) {
309      DeclContext::decl_iterator Next = D;
310      ++Next;
311      if (Next != DEnd)
312        Terminator = ",";
313    } else
314      Terminator = ";";
315
316    if (Terminator)
317      Out << Terminator;
318    Out << "\n";
319  }
320
321  if (!Decls.empty())
322    ProcessDeclGroup(Decls);
323
324  if (Indent)
325    Indentation -= Policy.Indentation;
326}
327
328void DeclPrinter::VisitTranslationUnitDecl(TranslationUnitDecl *D) {
329  VisitDeclContext(D, false);
330}
331
332void DeclPrinter::VisitTypedefDecl(TypedefDecl *D) {
333  if (!Policy.SuppressSpecifiers) {
334    Out << "typedef ";
335
336    if (D->isModulePrivate())
337      Out << "__module_private__ ";
338  }
339  D->getUnderlyingType().print(Out, Policy, D->getName());
340  prettyPrintAttributes(D);
341}
342
343void DeclPrinter::VisitTypeAliasDecl(TypeAliasDecl *D) {
344  Out << "using " << *D << " = " << D->getUnderlyingType().getAsString(Policy);
345}
346
347void DeclPrinter::VisitEnumDecl(EnumDecl *D) {
348  if (!Policy.SuppressSpecifiers && D->isModulePrivate())
349    Out << "__module_private__ ";
350  Out << "enum ";
351  if (D->isScoped()) {
352    if (D->isScopedUsingClassTag())
353      Out << "class ";
354    else
355      Out << "struct ";
356  }
357  Out << *D;
358
359  if (D->isFixed())
360    Out << " : " << D->getIntegerType().stream(Policy);
361
362  if (D->isCompleteDefinition()) {
363    Out << " {\n";
364    VisitDeclContext(D);
365    Indent() << "}";
366  }
367  prettyPrintAttributes(D);
368}
369
370void DeclPrinter::VisitRecordDecl(RecordDecl *D) {
371  if (!Policy.SuppressSpecifiers && D->isModulePrivate())
372    Out << "__module_private__ ";
373  Out << D->getKindName();
374  if (D->getIdentifier())
375    Out << ' ' << *D;
376
377  if (D->isCompleteDefinition()) {
378    Out << " {\n";
379    VisitDeclContext(D);
380    Indent() << "}";
381  }
382}
383
384void DeclPrinter::VisitEnumConstantDecl(EnumConstantDecl *D) {
385  Out << *D;
386  if (Expr *Init = D->getInitExpr()) {
387    Out << " = ";
388    Init->printPretty(Out, 0, Policy, Indentation);
389  }
390}
391
392void DeclPrinter::VisitFunctionDecl(FunctionDecl *D) {
393  if (!Policy.SuppressSpecifiers) {
394    switch (D->getStorageClassAsWritten()) {
395    case SC_None: break;
396    case SC_Extern: Out << "extern "; break;
397    case SC_Static: Out << "static "; break;
398    case SC_PrivateExtern: Out << "__private_extern__ "; break;
399    case SC_Auto: case SC_Register: case SC_OpenCLWorkGroupLocal:
400      llvm_unreachable("invalid for functions");
401    }
402
403    if (D->isInlineSpecified())  Out << "inline ";
404    if (D->isVirtualAsWritten()) Out << "virtual ";
405    if (D->isModulePrivate())    Out << "__module_private__ ";
406  }
407
408  PrintingPolicy SubPolicy(Policy);
409  SubPolicy.SuppressSpecifiers = false;
410  std::string Proto = D->getNameInfo().getAsString();
411
412  QualType Ty = D->getType();
413  while (const ParenType *PT = dyn_cast<ParenType>(Ty)) {
414    Proto = '(' + Proto + ')';
415    Ty = PT->getInnerType();
416  }
417
418  if (isa<FunctionType>(Ty)) {
419    const FunctionType *AFT = Ty->getAs<FunctionType>();
420    const FunctionProtoType *FT = 0;
421    if (D->hasWrittenPrototype())
422      FT = dyn_cast<FunctionProtoType>(AFT);
423
424    Proto += "(";
425    if (FT) {
426      llvm::raw_string_ostream POut(Proto);
427      DeclPrinter ParamPrinter(POut, SubPolicy, Indentation);
428      for (unsigned i = 0, e = D->getNumParams(); i != e; ++i) {
429        if (i) POut << ", ";
430        ParamPrinter.VisitParmVarDecl(D->getParamDecl(i));
431      }
432
433      if (FT->isVariadic()) {
434        if (D->getNumParams()) POut << ", ";
435        POut << "...";
436      }
437    } else if (D->doesThisDeclarationHaveABody() && !D->hasPrototype()) {
438      for (unsigned i = 0, e = D->getNumParams(); i != e; ++i) {
439        if (i)
440          Proto += ", ";
441        Proto += D->getParamDecl(i)->getNameAsString();
442      }
443    }
444
445    Proto += ")";
446
447    if (FT) {
448      if (FT->isConst())
449        Proto += " const";
450      if (FT->isVolatile())
451        Proto += " volatile";
452      if (FT->isRestrict())
453        Proto += " restrict";
454    }
455
456    if (FT && FT->hasDynamicExceptionSpec()) {
457      Proto += " throw(";
458      if (FT->getExceptionSpecType() == EST_MSAny)
459        Proto += "...";
460      else
461        for (unsigned I = 0, N = FT->getNumExceptions(); I != N; ++I) {
462          if (I)
463            Proto += ", ";
464
465          Proto += FT->getExceptionType(I).getAsString(SubPolicy);;
466        }
467      Proto += ")";
468    } else if (FT && isNoexceptExceptionSpec(FT->getExceptionSpecType())) {
469      Proto += " noexcept";
470      if (FT->getExceptionSpecType() == EST_ComputedNoexcept) {
471        Proto += "(";
472        llvm::raw_string_ostream EOut(Proto);
473        FT->getNoexceptExpr()->printPretty(EOut, 0, SubPolicy,
474                                           Indentation);
475        EOut.flush();
476        Proto += EOut.str();
477        Proto += ")";
478      }
479    }
480
481    if (CXXConstructorDecl *CDecl = dyn_cast<CXXConstructorDecl>(D)) {
482      bool HasInitializerList = false;
483      for (CXXConstructorDecl::init_const_iterator B = CDecl->init_begin(),
484           E = CDecl->init_end();
485           B != E; ++B) {
486        CXXCtorInitializer * BMInitializer = (*B);
487        if (BMInitializer->isInClassMemberInitializer())
488          continue;
489
490        if (!HasInitializerList) {
491          Proto += " : ";
492          Out << Proto;
493          Proto.clear();
494          HasInitializerList = true;
495        } else
496          Out << ", ";
497
498        if (BMInitializer->isAnyMemberInitializer()) {
499          FieldDecl *FD = BMInitializer->getAnyMember();
500          Out << *FD;
501        } else {
502          Out << QualType(BMInitializer->getBaseClass(), 0).getAsString(Policy);
503        }
504
505        Out << "(";
506        if (!BMInitializer->getInit()) {
507          // Nothing to print
508        } else {
509          Expr *Init = BMInitializer->getInit();
510          if (ExprWithCleanups *Tmp = dyn_cast<ExprWithCleanups>(Init))
511            Init = Tmp->getSubExpr();
512
513          Init = Init->IgnoreParens();
514
515          Expr *SimpleInit = 0;
516          Expr **Args = 0;
517          unsigned NumArgs = 0;
518          if (ParenListExpr *ParenList = dyn_cast<ParenListExpr>(Init)) {
519            Args = ParenList->getExprs();
520            NumArgs = ParenList->getNumExprs();
521          } else if (CXXConstructExpr *Construct
522                                        = dyn_cast<CXXConstructExpr>(Init)) {
523            Args = Construct->getArgs();
524            NumArgs = Construct->getNumArgs();
525          } else
526            SimpleInit = Init;
527
528          if (SimpleInit)
529            SimpleInit->printPretty(Out, 0, Policy, Indentation);
530          else {
531            for (unsigned I = 0; I != NumArgs; ++I) {
532              if (isa<CXXDefaultArgExpr>(Args[I]))
533                break;
534
535              if (I)
536                Out << ", ";
537              Args[I]->printPretty(Out, 0, Policy, Indentation);
538            }
539          }
540        }
541        Out << ")";
542      }
543    }
544    else
545      AFT->getResultType().print(Out, Policy, Proto);
546  } else {
547    Ty.print(Out, Policy, Proto);
548  }
549
550  prettyPrintAttributes(D);
551
552  if (D->isPure())
553    Out << " = 0";
554  else if (D->isDeletedAsWritten())
555    Out << " = delete";
556  else if (D->doesThisDeclarationHaveABody()) {
557    if (!D->hasPrototype() && D->getNumParams()) {
558      // This is a K&R function definition, so we need to print the
559      // parameters.
560      Out << '\n';
561      DeclPrinter ParamPrinter(Out, SubPolicy, Indentation);
562      Indentation += Policy.Indentation;
563      for (unsigned i = 0, e = D->getNumParams(); i != e; ++i) {
564        Indent();
565        ParamPrinter.VisitParmVarDecl(D->getParamDecl(i));
566        Out << ";\n";
567      }
568      Indentation -= Policy.Indentation;
569    } else
570      Out << ' ';
571
572    D->getBody()->printPretty(Out, 0, SubPolicy, Indentation);
573    Out << '\n';
574  }
575}
576
577void DeclPrinter::VisitFieldDecl(FieldDecl *D) {
578  if (!Policy.SuppressSpecifiers && D->isMutable())
579    Out << "mutable ";
580  if (!Policy.SuppressSpecifiers && D->isModulePrivate())
581    Out << "__module_private__ ";
582
583  Out << D->getType().stream(Policy, D->getName());
584
585  if (D->isBitField()) {
586    Out << " : ";
587    D->getBitWidth()->printPretty(Out, 0, Policy, Indentation);
588  }
589
590  Expr *Init = D->getInClassInitializer();
591  if (!Policy.SuppressInitializers && Init) {
592    if (D->getInClassInitStyle() == ICIS_ListInit)
593      Out << " ";
594    else
595      Out << " = ";
596    Init->printPretty(Out, 0, Policy, Indentation);
597  }
598  prettyPrintAttributes(D);
599}
600
601void DeclPrinter::VisitLabelDecl(LabelDecl *D) {
602  Out << *D << ":";
603}
604
605
606void DeclPrinter::VisitVarDecl(VarDecl *D) {
607  StorageClass SCAsWritten = D->getStorageClassAsWritten();
608  if (!Policy.SuppressSpecifiers && SCAsWritten != SC_None)
609    Out << VarDecl::getStorageClassSpecifierString(SCAsWritten) << " ";
610
611  if (!Policy.SuppressSpecifiers && D->isThreadSpecified())
612    Out << "__thread ";
613  if (!Policy.SuppressSpecifiers && D->isModulePrivate())
614    Out << "__module_private__ ";
615
616  QualType T = D->getType();
617  if (ParmVarDecl *Parm = dyn_cast<ParmVarDecl>(D))
618    T = Parm->getOriginalType();
619  T.print(Out, Policy, D->getName());
620  Expr *Init = D->getInit();
621  if (!Policy.SuppressInitializers && Init) {
622    bool ImplicitInit = false;
623    if (CXXConstructExpr *Construct = dyn_cast<CXXConstructExpr>(Init))
624      ImplicitInit = D->getInitStyle() == VarDecl::CallInit &&
625          Construct->getNumArgs() == 0 && !Construct->isListInitialization();
626    if (!ImplicitInit) {
627      if (D->getInitStyle() == VarDecl::CallInit)
628        Out << "(";
629      else if (D->getInitStyle() == VarDecl::CInit) {
630        Out << " = ";
631      }
632      Init->printPretty(Out, 0, Policy, Indentation);
633      if (D->getInitStyle() == VarDecl::CallInit)
634        Out << ")";
635    }
636  }
637  prettyPrintAttributes(D);
638}
639
640void DeclPrinter::VisitParmVarDecl(ParmVarDecl *D) {
641  VisitVarDecl(D);
642}
643
644void DeclPrinter::VisitFileScopeAsmDecl(FileScopeAsmDecl *D) {
645  Out << "__asm (";
646  D->getAsmString()->printPretty(Out, 0, Policy, Indentation);
647  Out << ")";
648}
649
650void DeclPrinter::VisitImportDecl(ImportDecl *D) {
651  Out << "@__experimental_modules_import " << D->getImportedModule()->getFullModuleName()
652      << ";\n";
653}
654
655void DeclPrinter::VisitStaticAssertDecl(StaticAssertDecl *D) {
656  Out << "static_assert(";
657  D->getAssertExpr()->printPretty(Out, 0, Policy, Indentation);
658  Out << ", ";
659  D->getMessage()->printPretty(Out, 0, Policy, Indentation);
660  Out << ")";
661}
662
663//----------------------------------------------------------------------------
664// C++ declarations
665//----------------------------------------------------------------------------
666void DeclPrinter::VisitNamespaceDecl(NamespaceDecl *D) {
667  if (D->isInline())
668    Out << "inline ";
669  Out << "namespace " << *D << " {\n";
670  VisitDeclContext(D);
671  Indent() << "}";
672}
673
674void DeclPrinter::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
675  Out << "using namespace ";
676  if (D->getQualifier())
677    D->getQualifier()->print(Out, Policy);
678  Out << *D->getNominatedNamespaceAsWritten();
679}
680
681void DeclPrinter::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
682  Out << "namespace " << *D << " = ";
683  if (D->getQualifier())
684    D->getQualifier()->print(Out, Policy);
685  Out << *D->getAliasedNamespace();
686}
687
688void DeclPrinter::VisitCXXRecordDecl(CXXRecordDecl *D) {
689  if (!Policy.SuppressSpecifiers && D->isModulePrivate())
690    Out << "__module_private__ ";
691  Out << D->getKindName();
692  if (D->getIdentifier())
693    Out << ' ' << *D;
694
695  if (D->isCompleteDefinition()) {
696    // Print the base classes
697    if (D->getNumBases()) {
698      Out << " : ";
699      for (CXXRecordDecl::base_class_iterator Base = D->bases_begin(),
700             BaseEnd = D->bases_end(); Base != BaseEnd; ++Base) {
701        if (Base != D->bases_begin())
702          Out << ", ";
703
704        if (Base->isVirtual())
705          Out << "virtual ";
706
707        AccessSpecifier AS = Base->getAccessSpecifierAsWritten();
708        if (AS != AS_none)
709          Print(AS);
710        Out << " " << Base->getType().getAsString(Policy);
711
712        if (Base->isPackExpansion())
713          Out << "...";
714      }
715    }
716
717    // Print the class definition
718    // FIXME: Doesn't print access specifiers, e.g., "public:"
719    Out << " {\n";
720    VisitDeclContext(D);
721    Indent() << "}";
722  }
723}
724
725void DeclPrinter::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
726  const char *l;
727  if (D->getLanguage() == LinkageSpecDecl::lang_c)
728    l = "C";
729  else {
730    assert(D->getLanguage() == LinkageSpecDecl::lang_cxx &&
731           "unknown language in linkage specification");
732    l = "C++";
733  }
734
735  Out << "extern \"" << l << "\" ";
736  if (D->hasBraces()) {
737    Out << "{\n";
738    VisitDeclContext(D);
739    Indent() << "}";
740  } else
741    Visit(*D->decls_begin());
742}
743
744void DeclPrinter::PrintTemplateParameters(
745    const TemplateParameterList *Params, const TemplateArgumentList *Args = 0) {
746  assert(Params);
747  assert(!Args || Params->size() == Args->size());
748
749  Out << "template <";
750
751  for (unsigned i = 0, e = Params->size(); i != e; ++i) {
752    if (i != 0)
753      Out << ", ";
754
755    const Decl *Param = Params->getParam(i);
756    if (const TemplateTypeParmDecl *TTP =
757          dyn_cast<TemplateTypeParmDecl>(Param)) {
758
759      if (TTP->wasDeclaredWithTypename())
760        Out << "typename ";
761      else
762        Out << "class ";
763
764      if (TTP->isParameterPack())
765        Out << "... ";
766
767      Out << *TTP;
768
769      if (Args) {
770        Out << " = ";
771        Args->get(i).print(Policy, Out);
772      } else if (TTP->hasDefaultArgument()) {
773        Out << " = ";
774        Out << TTP->getDefaultArgument().getAsString(Policy);
775      };
776    } else if (const NonTypeTemplateParmDecl *NTTP =
777                 dyn_cast<NonTypeTemplateParmDecl>(Param)) {
778      Out << NTTP->getType().getAsString(Policy);
779
780      if (NTTP->isParameterPack() && !isa<PackExpansionType>(NTTP->getType()))
781        Out << "...";
782
783      if (IdentifierInfo *Name = NTTP->getIdentifier()) {
784        Out << ' ';
785        Out << Name->getName();
786      }
787
788      if (Args) {
789        Out << " = ";
790        Args->get(i).print(Policy, Out);
791      } else if (NTTP->hasDefaultArgument()) {
792        Out << " = ";
793        NTTP->getDefaultArgument()->printPretty(Out, 0, Policy, Indentation);
794      }
795    } else if (const TemplateTemplateParmDecl *TTPD =
796                 dyn_cast<TemplateTemplateParmDecl>(Param)) {
797      VisitTemplateDecl(TTPD);
798      // FIXME: print the default argument, if present.
799    }
800  }
801
802  Out << "> ";
803}
804
805void DeclPrinter::VisitTemplateDecl(const TemplateDecl *D) {
806  PrintTemplateParameters(D->getTemplateParameters());
807
808  if (const TemplateTemplateParmDecl *TTP =
809        dyn_cast<TemplateTemplateParmDecl>(D)) {
810    Out << "class ";
811    if (TTP->isParameterPack())
812      Out << "...";
813    Out << D->getName();
814  } else {
815    Visit(D->getTemplatedDecl());
816  }
817}
818
819void DeclPrinter::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
820  if (PrintInstantiation) {
821    TemplateParameterList *Params = D->getTemplateParameters();
822    for (FunctionTemplateDecl::spec_iterator I = D->spec_begin(), E = D->spec_end();
823         I != E; ++I) {
824      PrintTemplateParameters(Params, (*I)->getTemplateSpecializationArgs());
825      Visit(*I);
826    }
827  }
828
829  return VisitRedeclarableTemplateDecl(D);
830}
831
832void DeclPrinter::VisitClassTemplateDecl(ClassTemplateDecl *D) {
833  if (PrintInstantiation) {
834    TemplateParameterList *Params = D->getTemplateParameters();
835    for (ClassTemplateDecl::spec_iterator I = D->spec_begin(), E = D->spec_end();
836         I != E; ++I) {
837      PrintTemplateParameters(Params, &(*I)->getTemplateArgs());
838      Visit(*I);
839      Out << '\n';
840    }
841  }
842
843  return VisitRedeclarableTemplateDecl(D);
844}
845
846//----------------------------------------------------------------------------
847// Objective-C declarations
848//----------------------------------------------------------------------------
849
850void DeclPrinter::VisitObjCMethodDecl(ObjCMethodDecl *OMD) {
851  if (OMD->isInstanceMethod())
852    Out << "- ";
853  else
854    Out << "+ ";
855  if (!OMD->getResultType().isNull())
856    Out << '(' << OMD->getResultType().getAsString(Policy) << ")";
857
858  std::string name = OMD->getSelector().getAsString();
859  std::string::size_type pos, lastPos = 0;
860  for (ObjCMethodDecl::param_iterator PI = OMD->param_begin(),
861       E = OMD->param_end(); PI != E; ++PI) {
862    // FIXME: selector is missing here!
863    pos = name.find_first_of(':', lastPos);
864    Out << " " << name.substr(lastPos, pos - lastPos);
865    Out << ":(" << (*PI)->getType().getAsString(Policy) << ')' << **PI;
866    lastPos = pos + 1;
867  }
868
869  if (OMD->param_begin() == OMD->param_end())
870    Out << " " << name;
871
872  if (OMD->isVariadic())
873      Out << ", ...";
874
875  if (OMD->getBody()) {
876    Out << ' ';
877    OMD->getBody()->printPretty(Out, 0, Policy);
878    Out << '\n';
879  }
880}
881
882void DeclPrinter::VisitObjCImplementationDecl(ObjCImplementationDecl *OID) {
883  std::string I = OID->getNameAsString();
884  ObjCInterfaceDecl *SID = OID->getSuperClass();
885
886  if (SID)
887    Out << "@implementation " << I << " : " << *SID;
888  else
889    Out << "@implementation " << I;
890  Out << "\n";
891  VisitDeclContext(OID, false);
892  Out << "@end";
893}
894
895void DeclPrinter::VisitObjCInterfaceDecl(ObjCInterfaceDecl *OID) {
896  std::string I = OID->getNameAsString();
897  ObjCInterfaceDecl *SID = OID->getSuperClass();
898
899  if (!OID->isThisDeclarationADefinition()) {
900    Out << "@class " << I << ";";
901    return;
902  }
903
904  if (SID)
905    Out << "@interface " << I << " : " << *SID;
906  else
907    Out << "@interface " << I;
908
909  // Protocols?
910  const ObjCList<ObjCProtocolDecl> &Protocols = OID->getReferencedProtocols();
911  if (!Protocols.empty()) {
912    for (ObjCList<ObjCProtocolDecl>::iterator I = Protocols.begin(),
913         E = Protocols.end(); I != E; ++I)
914      Out << (I == Protocols.begin() ? '<' : ',') << **I;
915  }
916
917  if (!Protocols.empty())
918    Out << "> ";
919
920  if (OID->ivar_size() > 0) {
921    Out << "{\n";
922    Indentation += Policy.Indentation;
923    for (ObjCInterfaceDecl::ivar_iterator I = OID->ivar_begin(),
924         E = OID->ivar_end(); I != E; ++I) {
925      Indent() << I->getType().getAsString(Policy) << ' ' << **I << ";\n";
926    }
927    Indentation -= Policy.Indentation;
928    Out << "}\n";
929  }
930
931  VisitDeclContext(OID, false);
932  Out << "@end";
933  // FIXME: implement the rest...
934}
935
936void DeclPrinter::VisitObjCProtocolDecl(ObjCProtocolDecl *PID) {
937  if (!PID->isThisDeclarationADefinition()) {
938    Out << "@protocol " << PID->getIdentifier() << ";\n";
939    return;
940  }
941
942  Out << "@protocol " << *PID << '\n';
943  VisitDeclContext(PID, false);
944  Out << "@end";
945}
946
947void DeclPrinter::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *PID) {
948  Out << "@implementation " << *PID->getClassInterface() << '(' << *PID <<")\n";
949
950  VisitDeclContext(PID, false);
951  Out << "@end";
952  // FIXME: implement the rest...
953}
954
955void DeclPrinter::VisitObjCCategoryDecl(ObjCCategoryDecl *PID) {
956  Out << "@interface " << *PID->getClassInterface() << '(' << *PID << ")\n";
957  VisitDeclContext(PID, false);
958  Out << "@end";
959
960  // FIXME: implement the rest...
961}
962
963void DeclPrinter::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *AID) {
964  Out << "@compatibility_alias " << *AID
965      << ' ' << *AID->getClassInterface() << ";\n";
966}
967
968/// PrintObjCPropertyDecl - print a property declaration.
969///
970void DeclPrinter::VisitObjCPropertyDecl(ObjCPropertyDecl *PDecl) {
971  if (PDecl->getPropertyImplementation() == ObjCPropertyDecl::Required)
972    Out << "@required\n";
973  else if (PDecl->getPropertyImplementation() == ObjCPropertyDecl::Optional)
974    Out << "@optional\n";
975
976  Out << "@property";
977  if (PDecl->getPropertyAttributes() != ObjCPropertyDecl::OBJC_PR_noattr) {
978    bool first = true;
979    Out << " (";
980    if (PDecl->getPropertyAttributes() &
981        ObjCPropertyDecl::OBJC_PR_readonly) {
982      Out << (first ? ' ' : ',') << "readonly";
983      first = false;
984    }
985
986    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) {
987      Out << (first ? ' ' : ',') << "getter = "
988          << PDecl->getGetterName().getAsString();
989      first = false;
990    }
991    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) {
992      Out << (first ? ' ' : ',') << "setter = "
993          << PDecl->getSetterName().getAsString();
994      first = false;
995    }
996
997    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_assign) {
998      Out << (first ? ' ' : ',') << "assign";
999      first = false;
1000    }
1001
1002    if (PDecl->getPropertyAttributes() &
1003        ObjCPropertyDecl::OBJC_PR_readwrite) {
1004      Out << (first ? ' ' : ',') << "readwrite";
1005      first = false;
1006    }
1007
1008    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_retain) {
1009      Out << (first ? ' ' : ',') << "retain";
1010      first = false;
1011    }
1012
1013    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_strong) {
1014      Out << (first ? ' ' : ',') << "strong";
1015      first = false;
1016    }
1017
1018    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_copy) {
1019      Out << (first ? ' ' : ',') << "copy";
1020      first = false;
1021    }
1022
1023    if (PDecl->getPropertyAttributes() &
1024        ObjCPropertyDecl::OBJC_PR_nonatomic) {
1025      Out << (first ? ' ' : ',') << "nonatomic";
1026      first = false;
1027    }
1028    if (PDecl->getPropertyAttributes() &
1029        ObjCPropertyDecl::OBJC_PR_atomic) {
1030      Out << (first ? ' ' : ',') << "atomic";
1031      first = false;
1032    }
1033
1034    (void) first; // Silence dead store warning due to idiomatic code.
1035    Out << " )";
1036  }
1037  Out << ' ' << PDecl->getType().getAsString(Policy) << ' ' << *PDecl;
1038}
1039
1040void DeclPrinter::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *PID) {
1041  if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize)
1042    Out << "@synthesize ";
1043  else
1044    Out << "@dynamic ";
1045  Out << *PID->getPropertyDecl();
1046  if (PID->getPropertyIvarDecl())
1047    Out << '=' << *PID->getPropertyIvarDecl();
1048}
1049
1050void DeclPrinter::VisitUsingDecl(UsingDecl *D) {
1051  Out << "using ";
1052  D->getQualifier()->print(Out, Policy);
1053  Out << *D;
1054}
1055
1056void
1057DeclPrinter::VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D) {
1058  Out << "using typename ";
1059  D->getQualifier()->print(Out, Policy);
1060  Out << D->getDeclName();
1061}
1062
1063void DeclPrinter::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
1064  Out << "using ";
1065  D->getQualifier()->print(Out, Policy);
1066  Out << D->getDeclName();
1067}
1068
1069void DeclPrinter::VisitUsingShadowDecl(UsingShadowDecl *D) {
1070  // ignore
1071}
1072