DeclPrinter.cpp revision 32ad2ee2618745ce3da51c2ae066ed5f21157c07 
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    ASTContext &Context;
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, ASTContext &Context,
42                const PrintingPolicy &Policy,
43                unsigned Indentation = 0,
44                bool PrintInstantiation = false)
45      : Out(Out), Context(Context), Policy(Policy), Indentation(Indentation),
46        PrintInstantiation(PrintInstantiation) { }
47
48    void VisitDeclContext(DeclContext *DC, bool Indent = true);
49
50    void VisitTranslationUnitDecl(TranslationUnitDecl *D);
51    void VisitTypedefDecl(TypedefDecl *D);
52    void VisitTypeAliasDecl(TypeAliasDecl *D);
53    void VisitEnumDecl(EnumDecl *D);
54    void VisitRecordDecl(RecordDecl *D);
55    void VisitEnumConstantDecl(EnumConstantDecl *D);
56    void VisitFunctionDecl(FunctionDecl *D);
57    void VisitFieldDecl(FieldDecl *D);
58    void VisitVarDecl(VarDecl *D);
59    void VisitLabelDecl(LabelDecl *D);
60    void VisitParmVarDecl(ParmVarDecl *D);
61    void VisitFileScopeAsmDecl(FileScopeAsmDecl *D);
62    void VisitImportDecl(ImportDecl *D);
63    void VisitStaticAssertDecl(StaticAssertDecl *D);
64    void VisitNamespaceDecl(NamespaceDecl *D);
65    void VisitUsingDirectiveDecl(UsingDirectiveDecl *D);
66    void VisitNamespaceAliasDecl(NamespaceAliasDecl *D);
67    void VisitCXXRecordDecl(CXXRecordDecl *D);
68    void VisitLinkageSpecDecl(LinkageSpecDecl *D);
69    void VisitTemplateDecl(const TemplateDecl *D);
70    void VisitFunctionTemplateDecl(FunctionTemplateDecl *D);
71    void VisitClassTemplateDecl(ClassTemplateDecl *D);
72    void VisitObjCMethodDecl(ObjCMethodDecl *D);
73    void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
74    void VisitObjCInterfaceDecl(ObjCInterfaceDecl *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    void prettyPrintAttributes(Decl *D);
89  };
90}
91
92void Decl::print(raw_ostream &Out, unsigned Indentation,
93                 bool PrintInstantiation) const {
94  print(Out, getASTContext().getPrintingPolicy(), Indentation, PrintInstantiation);
95}
96
97void Decl::print(raw_ostream &Out, const PrintingPolicy &Policy,
98                 unsigned Indentation, bool PrintInstantiation) const {
99  DeclPrinter Printer(Out, getASTContext(), Policy, Indentation, PrintInstantiation);
100  Printer.Visit(const_cast<Decl*>(this));
101}
102
103static QualType GetBaseType(QualType T) {
104  // FIXME: This should be on the Type class!
105  QualType BaseType = T;
106  while (!BaseType->isSpecifierType()) {
107    if (isa<TypedefType>(BaseType))
108      break;
109    else if (const PointerType* PTy = BaseType->getAs<PointerType>())
110      BaseType = PTy->getPointeeType();
111    else if (const ArrayType* ATy = dyn_cast<ArrayType>(BaseType))
112      BaseType = ATy->getElementType();
113    else if (const FunctionType* FTy = BaseType->getAs<FunctionType>())
114      BaseType = FTy->getResultType();
115    else if (const VectorType *VTy = BaseType->getAs<VectorType>())
116      BaseType = VTy->getElementType();
117    else
118      llvm_unreachable("Unknown declarator!");
119  }
120  return BaseType;
121}
122
123static QualType getDeclType(Decl* D) {
124  if (TypedefNameDecl* TDD = dyn_cast<TypedefNameDecl>(D))
125    return TDD->getUnderlyingType();
126  if (ValueDecl* VD = dyn_cast<ValueDecl>(D))
127    return VD->getType();
128  return QualType();
129}
130
131void Decl::printGroup(Decl** Begin, unsigned NumDecls,
132                      raw_ostream &Out, const PrintingPolicy &Policy,
133                      unsigned Indentation) {
134  if (NumDecls == 1) {
135    (*Begin)->print(Out, Policy, Indentation);
136    return;
137  }
138
139  Decl** End = Begin + NumDecls;
140  TagDecl* TD = dyn_cast<TagDecl>(*Begin);
141  if (TD)
142    ++Begin;
143
144  PrintingPolicy SubPolicy(Policy);
145  if (TD && TD->isCompleteDefinition()) {
146    TD->print(Out, Policy, Indentation);
147    Out << " ";
148    SubPolicy.SuppressTag = true;
149  }
150
151  bool isFirst = true;
152  for ( ; Begin != End; ++Begin) {
153    if (isFirst) {
154      SubPolicy.SuppressSpecifiers = false;
155      isFirst = false;
156    } else {
157      if (!isFirst) Out << ", ";
158      SubPolicy.SuppressSpecifiers = true;
159    }
160
161    (*Begin)->print(Out, SubPolicy, Indentation);
162  }
163}
164
165void DeclContext::dumpDeclContext() const {
166  // Get the translation unit
167  const DeclContext *DC = this;
168  while (!DC->isTranslationUnit())
169    DC = DC->getParent();
170
171  ASTContext &Ctx = cast<TranslationUnitDecl>(DC)->getASTContext();
172  DeclPrinter Printer(llvm::errs(), Ctx, Ctx.getPrintingPolicy(), 0);
173  Printer.VisitDeclContext(const_cast<DeclContext *>(this), /*Indent=*/false);
174}
175
176void Decl::dump() const {
177  print(llvm::errs());
178}
179
180raw_ostream& DeclPrinter::Indent(unsigned Indentation) {
181  for (unsigned i = 0; i != Indentation; ++i)
182    Out << "  ";
183  return Out;
184}
185
186void DeclPrinter::prettyPrintAttributes(Decl *D) {
187  if (D->hasAttrs()) {
188    AttrVec &Attrs = D->getAttrs();
189    for (AttrVec::const_iterator i=Attrs.begin(), e=Attrs.end(); i!=e; ++i) {
190        Attr *A = *i;
191        A->printPretty(Out, Context);
192    }
193  }
194}
195
196void DeclPrinter::ProcessDeclGroup(SmallVectorImpl<Decl*>& Decls) {
197  this->Indent();
198  Decl::printGroup(Decls.data(), Decls.size(), Out, Policy, Indentation);
199  Out << ";\n";
200  Decls.clear();
201
202}
203
204void DeclPrinter::Print(AccessSpecifier AS) {
205  switch(AS) {
206  case AS_none:      llvm_unreachable("No access specifier!");
207  case AS_public:    Out << "public"; break;
208  case AS_protected: Out << "protected"; break;
209  case AS_private:   Out << "private"; break;
210  }
211}
212
213//----------------------------------------------------------------------------
214// Common C declarations
215//----------------------------------------------------------------------------
216
217void DeclPrinter::VisitDeclContext(DeclContext *DC, bool Indent) {
218  if (Indent)
219    Indentation += Policy.Indentation;
220
221  SmallVector<Decl*, 2> Decls;
222  for (DeclContext::decl_iterator D = DC->decls_begin(), DEnd = DC->decls_end();
223       D != DEnd; ++D) {
224
225    // Don't print ObjCIvarDecls, as they are printed when visiting the
226    // containing ObjCInterfaceDecl.
227    if (isa<ObjCIvarDecl>(*D))
228      continue;
229
230    if (!Policy.Dump) {
231      // Skip over implicit declarations in pretty-printing mode.
232      if (D->isImplicit()) continue;
233      // FIXME: Ugly hack so we don't pretty-print the builtin declaration
234      // of __builtin_va_list or __[u]int128_t.  There should be some other way
235      // to check that.
236      if (NamedDecl *ND = dyn_cast<NamedDecl>(*D)) {
237        if (IdentifierInfo *II = ND->getIdentifier()) {
238          if (II->isStr("__builtin_va_list") ||
239              II->isStr("__int128_t") || II->isStr("__uint128_t"))
240            continue;
241        }
242      }
243    }
244
245    // The next bits of code handles stuff like "struct {int x;} a,b"; we're
246    // forced to merge the declarations because there's no other way to
247    // refer to the struct in question.  This limited merging is safe without
248    // a bunch of other checks because it only merges declarations directly
249    // referring to the tag, not typedefs.
250    //
251    // Check whether the current declaration should be grouped with a previous
252    // unnamed struct.
253    QualType CurDeclType = getDeclType(*D);
254    if (!Decls.empty() && !CurDeclType.isNull()) {
255      QualType BaseType = GetBaseType(CurDeclType);
256      if (!BaseType.isNull() && isa<TagType>(BaseType) &&
257          cast<TagType>(BaseType)->getDecl() == Decls[0]) {
258        Decls.push_back(*D);
259        continue;
260      }
261    }
262
263    // If we have a merged group waiting to be handled, handle it now.
264    if (!Decls.empty())
265      ProcessDeclGroup(Decls);
266
267    // If the current declaration is an unnamed tag type, save it
268    // so we can merge it with the subsequent declaration(s) using it.
269    if (isa<TagDecl>(*D) && !cast<TagDecl>(*D)->getIdentifier()) {
270      Decls.push_back(*D);
271      continue;
272    }
273
274    if (isa<AccessSpecDecl>(*D)) {
275      Indentation -= Policy.Indentation;
276      this->Indent();
277      Print(D->getAccess());
278      Out << ":\n";
279      Indentation += Policy.Indentation;
280      continue;
281    }
282
283    this->Indent();
284    Visit(*D);
285
286    // FIXME: Need to be able to tell the DeclPrinter when
287    const char *Terminator = 0;
288    if (isa<FunctionDecl>(*D) &&
289        cast<FunctionDecl>(*D)->isThisDeclarationADefinition())
290      Terminator = 0;
291    else if (isa<ObjCMethodDecl>(*D) && cast<ObjCMethodDecl>(*D)->getBody())
292      Terminator = 0;
293    else if (isa<NamespaceDecl>(*D) || isa<LinkageSpecDecl>(*D) ||
294             isa<ObjCImplementationDecl>(*D) ||
295             isa<ObjCInterfaceDecl>(*D) ||
296             isa<ObjCProtocolDecl>(*D) ||
297             isa<ObjCCategoryImplDecl>(*D) ||
298             isa<ObjCCategoryDecl>(*D))
299      Terminator = 0;
300    else if (isa<EnumConstantDecl>(*D)) {
301      DeclContext::decl_iterator Next = D;
302      ++Next;
303      if (Next != DEnd)
304        Terminator = ",";
305    } else
306      Terminator = ";";
307
308    if (Terminator)
309      Out << Terminator;
310    Out << "\n";
311  }
312
313  if (!Decls.empty())
314    ProcessDeclGroup(Decls);
315
316  if (Indent)
317    Indentation -= Policy.Indentation;
318}
319
320void DeclPrinter::VisitTranslationUnitDecl(TranslationUnitDecl *D) {
321  VisitDeclContext(D, false);
322}
323
324void DeclPrinter::VisitTypedefDecl(TypedefDecl *D) {
325  std::string S = D->getNameAsString();
326  D->getUnderlyingType().getAsStringInternal(S, Policy);
327  if (!Policy.SuppressSpecifiers) {
328    Out << "typedef ";
329
330    if (D->isModulePrivate())
331      Out << "__module_private__ ";
332  }
333  Out << S;
334  prettyPrintAttributes(D);
335}
336
337void DeclPrinter::VisitTypeAliasDecl(TypeAliasDecl *D) {
338  Out << "using " << *D << " = " << D->getUnderlyingType().getAsString(Policy);
339}
340
341void DeclPrinter::VisitEnumDecl(EnumDecl *D) {
342  if (!Policy.SuppressSpecifiers && D->isModulePrivate())
343    Out << "__module_private__ ";
344  Out << "enum ";
345  if (D->isScoped()) {
346    if (D->isScopedUsingClassTag())
347      Out << "class ";
348    else
349      Out << "struct ";
350  }
351  Out << *D;
352
353  if (D->isFixed()) {
354    std::string Underlying;
355    D->getIntegerType().getAsStringInternal(Underlying, Policy);
356    Out << " : " << Underlying;
357  }
358
359  if (D->isCompleteDefinition()) {
360    Out << " {\n";
361    VisitDeclContext(D);
362    Indent() << "}";
363  }
364  prettyPrintAttributes(D);
365}
366
367void DeclPrinter::VisitRecordDecl(RecordDecl *D) {
368  if (!Policy.SuppressSpecifiers && D->isModulePrivate())
369    Out << "__module_private__ ";
370  Out << D->getKindName();
371  if (D->getIdentifier())
372    Out << ' ' << *D;
373
374  if (D->isCompleteDefinition()) {
375    Out << " {\n";
376    VisitDeclContext(D);
377    Indent() << "}";
378  }
379}
380
381void DeclPrinter::VisitEnumConstantDecl(EnumConstantDecl *D) {
382  Out << *D;
383  if (Expr *Init = D->getInitExpr()) {
384    Out << " = ";
385    Init->printPretty(Out, Context, 0, Policy, Indentation);
386  }
387}
388
389void DeclPrinter::VisitFunctionDecl(FunctionDecl *D) {
390  if (!Policy.SuppressSpecifiers) {
391    switch (D->getStorageClassAsWritten()) {
392    case SC_None: break;
393    case SC_Extern: Out << "extern "; break;
394    case SC_Static: Out << "static "; break;
395    case SC_PrivateExtern: Out << "__private_extern__ "; break;
396    case SC_Auto: case SC_Register: case SC_OpenCLWorkGroupLocal:
397      llvm_unreachable("invalid for functions");
398    }
399
400    if (D->isInlineSpecified())  Out << "inline ";
401    if (D->isVirtualAsWritten()) Out << "virtual ";
402    if (D->isModulePrivate())    Out << "__module_private__ ";
403  }
404
405  PrintingPolicy SubPolicy(Policy);
406  SubPolicy.SuppressSpecifiers = false;
407  std::string Proto = D->getNameInfo().getAsString();
408
409  QualType Ty = D->getType();
410  while (const ParenType *PT = dyn_cast<ParenType>(Ty)) {
411    Proto = '(' + Proto + ')';
412    Ty = PT->getInnerType();
413  }
414
415  if (isa<FunctionType>(Ty)) {
416    const FunctionType *AFT = Ty->getAs<FunctionType>();
417    const FunctionProtoType *FT = 0;
418    if (D->hasWrittenPrototype())
419      FT = dyn_cast<FunctionProtoType>(AFT);
420
421    Proto += "(";
422    if (FT) {
423      llvm::raw_string_ostream POut(Proto);
424      DeclPrinter ParamPrinter(POut, Context, SubPolicy, Indentation);
425      for (unsigned i = 0, e = D->getNumParams(); i != e; ++i) {
426        if (i) POut << ", ";
427        ParamPrinter.VisitParmVarDecl(D->getParamDecl(i));
428      }
429
430      if (FT->isVariadic()) {
431        if (D->getNumParams()) POut << ", ";
432        POut << "...";
433      }
434    } else if (D->doesThisDeclarationHaveABody() && !D->hasPrototype()) {
435      for (unsigned i = 0, e = D->getNumParams(); i != e; ++i) {
436        if (i)
437          Proto += ", ";
438        Proto += D->getParamDecl(i)->getNameAsString();
439      }
440    }
441
442    Proto += ")";
443
444    if (FT && FT->getTypeQuals()) {
445      unsigned TypeQuals = FT->getTypeQuals();
446      if (TypeQuals & Qualifiers::Const)
447        Proto += " const";
448      if (TypeQuals & Qualifiers::Volatile)
449        Proto += " volatile";
450      if (TypeQuals & Qualifiers::Restrict)
451        Proto += " restrict";
452    }
453
454    if (FT && FT->hasDynamicExceptionSpec()) {
455      Proto += " throw(";
456      if (FT->getExceptionSpecType() == EST_MSAny)
457        Proto += "...";
458      else
459        for (unsigned I = 0, N = FT->getNumExceptions(); I != N; ++I) {
460          if (I)
461            Proto += ", ";
462
463          std::string ExceptionType;
464          FT->getExceptionType(I).getAsStringInternal(ExceptionType, SubPolicy);
465          Proto += ExceptionType;
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, Context, 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, Context, 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, Context, 0, Policy, Indentation);
538            }
539          }
540        }
541        Out << ")";
542      }
543    }
544    else
545      AFT->getResultType().getAsStringInternal(Proto, Policy);
546  } else {
547    Ty.getAsStringInternal(Proto, Policy);
548  }
549
550  Out << Proto;
551  prettyPrintAttributes(D);
552
553  if (D->isPure())
554    Out << " = 0";
555  else if (D->isDeletedAsWritten())
556    Out << " = delete";
557  else if (D->doesThisDeclarationHaveABody()) {
558    if (!D->hasPrototype() && D->getNumParams()) {
559      // This is a K&R function definition, so we need to print the
560      // parameters.
561      Out << '\n';
562      DeclPrinter ParamPrinter(Out, Context, SubPolicy, Indentation);
563      Indentation += Policy.Indentation;
564      for (unsigned i = 0, e = D->getNumParams(); i != e; ++i) {
565        Indent();
566        ParamPrinter.VisitParmVarDecl(D->getParamDecl(i));
567        Out << ";\n";
568      }
569      Indentation -= Policy.Indentation;
570    } else
571      Out << ' ';
572
573    D->getBody()->printPretty(Out, Context, 0, SubPolicy, Indentation);
574    Out << '\n';
575  }
576}
577
578void DeclPrinter::VisitFieldDecl(FieldDecl *D) {
579  if (!Policy.SuppressSpecifiers && D->isMutable())
580    Out << "mutable ";
581  if (!Policy.SuppressSpecifiers && D->isModulePrivate())
582    Out << "__module_private__ ";
583
584  std::string Name = D->getNameAsString();
585  D->getType().getAsStringInternal(Name, Policy);
586  Out << Name;
587
588  if (D->isBitField()) {
589    Out << " : ";
590    D->getBitWidth()->printPretty(Out, Context, 0, Policy, Indentation);
591  }
592
593  Expr *Init = D->getInClassInitializer();
594  if (!Policy.SuppressInitializers && Init) {
595    Out << " = ";
596    Init->printPretty(Out, Context, 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  std::string Name = D->getNameAsString();
617  QualType T = D->getType();
618  if (ParmVarDecl *Parm = dyn_cast<ParmVarDecl>(D))
619    T = Parm->getOriginalType();
620  T.getAsStringInternal(Name, Policy);
621  Out << Name;
622  Expr *Init = D->getInit();
623  if (!Policy.SuppressInitializers && Init) {
624    bool ImplicitInit = false;
625    if (CXXConstructExpr *Construct = dyn_cast<CXXConstructExpr>(Init))
626      ImplicitInit = D->getInitStyle() == VarDecl::CallInit &&
627          Construct->getNumArgs() == 0 && !Construct->isListInitialization();
628    if (!ImplicitInit) {
629      if (D->getInitStyle() == VarDecl::CallInit)
630        Out << "(";
631      else if (D->getInitStyle() == VarDecl::CInit) {
632        Out << " = ";
633      }
634      Init->printPretty(Out, Context, 0, Policy, Indentation);
635      if (D->getInitStyle() == VarDecl::CallInit)
636        Out << ")";
637    }
638  }
639  prettyPrintAttributes(D);
640}
641
642void DeclPrinter::VisitParmVarDecl(ParmVarDecl *D) {
643  VisitVarDecl(D);
644}
645
646void DeclPrinter::VisitFileScopeAsmDecl(FileScopeAsmDecl *D) {
647  Out << "__asm (";
648  D->getAsmString()->printPretty(Out, Context, 0, Policy, Indentation);
649  Out << ")";
650}
651
652void DeclPrinter::VisitImportDecl(ImportDecl *D) {
653  Out << "@__experimental_modules_import " << D->getImportedModule()->getFullModuleName()
654      << ";\n";
655}
656
657void DeclPrinter::VisitStaticAssertDecl(StaticAssertDecl *D) {
658  Out << "static_assert(";
659  D->getAssertExpr()->printPretty(Out, Context, 0, Policy, Indentation);
660  Out << ", ";
661  D->getMessage()->printPretty(Out, Context, 0, Policy, Indentation);
662  Out << ")";
663}
664
665//----------------------------------------------------------------------------
666// C++ declarations
667//----------------------------------------------------------------------------
668void DeclPrinter::VisitNamespaceDecl(NamespaceDecl *D) {
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, Context, 0, Policy,
794                                                Indentation);
795      }
796    } else if (const TemplateTemplateParmDecl *TTPD =
797                 dyn_cast<TemplateTemplateParmDecl>(Param)) {
798      VisitTemplateDecl(TTPD);
799      // FIXME: print the default argument, if present.
800    }
801  }
802
803  Out << "> ";
804}
805
806void DeclPrinter::VisitTemplateDecl(const TemplateDecl *D) {
807  PrintTemplateParameters(D->getTemplateParameters());
808
809  if (const TemplateTemplateParmDecl *TTP =
810        dyn_cast<TemplateTemplateParmDecl>(D)) {
811    Out << "class ";
812    if (TTP->isParameterPack())
813      Out << "...";
814    Out << D->getName();
815  } else {
816    Visit(D->getTemplatedDecl());
817  }
818}
819
820void DeclPrinter::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
821  if (PrintInstantiation) {
822    TemplateParameterList *Params = D->getTemplateParameters();
823    for (FunctionTemplateDecl::spec_iterator I = D->spec_begin(), E = D->spec_end();
824         I != E; ++I) {
825      PrintTemplateParameters(Params, (*I)->getTemplateSpecializationArgs());
826      Visit(*I);
827    }
828  }
829
830  return VisitRedeclarableTemplateDecl(D);
831}
832
833void DeclPrinter::VisitClassTemplateDecl(ClassTemplateDecl *D) {
834  if (PrintInstantiation) {
835    TemplateParameterList *Params = D->getTemplateParameters();
836    for (ClassTemplateDecl::spec_iterator I = D->spec_begin(), E = D->spec_end();
837         I != E; ++I) {
838      PrintTemplateParameters(Params, &(*I)->getTemplateArgs());
839      Visit(*I);
840      Out << '\n';
841    }
842  }
843
844  return VisitRedeclarableTemplateDecl(D);
845}
846
847//----------------------------------------------------------------------------
848// Objective-C declarations
849//----------------------------------------------------------------------------
850
851void DeclPrinter::VisitObjCMethodDecl(ObjCMethodDecl *OMD) {
852  if (OMD->isInstanceMethod())
853    Out << "- ";
854  else
855    Out << "+ ";
856  if (!OMD->getResultType().isNull())
857    Out << '(' << OMD->getResultType().getAsString(Policy) << ")";
858
859  std::string name = OMD->getSelector().getAsString();
860  std::string::size_type pos, lastPos = 0;
861  for (ObjCMethodDecl::param_iterator PI = OMD->param_begin(),
862       E = OMD->param_end(); PI != E; ++PI) {
863    // FIXME: selector is missing here!
864    pos = name.find_first_of(':', lastPos);
865    Out << " " << name.substr(lastPos, pos - lastPos);
866    Out << ":(" << (*PI)->getType().getAsString(Policy) << ')' << **PI;
867    lastPos = pos + 1;
868  }
869
870  if (OMD->param_begin() == OMD->param_end())
871    Out << " " << name;
872
873  if (OMD->isVariadic())
874      Out << ", ...";
875
876  if (OMD->getBody()) {
877    Out << ' ';
878    OMD->getBody()->printPretty(Out, Context, 0, Policy);
879    Out << '\n';
880  }
881}
882
883void DeclPrinter::VisitObjCImplementationDecl(ObjCImplementationDecl *OID) {
884  std::string I = OID->getNameAsString();
885  ObjCInterfaceDecl *SID = OID->getSuperClass();
886
887  if (SID)
888    Out << "@implementation " << I << " : " << *SID;
889  else
890    Out << "@implementation " << I;
891  Out << "\n";
892  VisitDeclContext(OID, false);
893  Out << "@end";
894}
895
896void DeclPrinter::VisitObjCInterfaceDecl(ObjCInterfaceDecl *OID) {
897  std::string I = OID->getNameAsString();
898  ObjCInterfaceDecl *SID = OID->getSuperClass();
899
900  if (!OID->isThisDeclarationADefinition()) {
901    Out << "@class " << I << ";";
902    return;
903  }
904
905  if (SID)
906    Out << "@interface " << I << " : " << *SID;
907  else
908    Out << "@interface " << I;
909
910  // Protocols?
911  const ObjCList<ObjCProtocolDecl> &Protocols = OID->getReferencedProtocols();
912  if (!Protocols.empty()) {
913    for (ObjCList<ObjCProtocolDecl>::iterator I = Protocols.begin(),
914         E = Protocols.end(); I != E; ++I)
915      Out << (I == Protocols.begin() ? '<' : ',') << **I;
916  }
917
918  if (!Protocols.empty())
919    Out << "> ";
920
921  if (OID->ivar_size() > 0) {
922    Out << "{\n";
923    Indentation += Policy.Indentation;
924    for (ObjCInterfaceDecl::ivar_iterator I = OID->ivar_begin(),
925         E = OID->ivar_end(); I != E; ++I) {
926      Indent() << (*I)->getType().getAsString(Policy) << ' ' << **I << ";\n";
927    }
928    Indentation -= Policy.Indentation;
929    Out << "}\n";
930  }
931
932  VisitDeclContext(OID, false);
933  Out << "@end";
934  // FIXME: implement the rest...
935}
936
937void DeclPrinter::VisitObjCProtocolDecl(ObjCProtocolDecl *PID) {
938  if (!PID->isThisDeclarationADefinition()) {
939    Out << "@protocol " << PID->getIdentifier() << ";\n";
940    return;
941  }
942
943  Out << "@protocol " << *PID << '\n';
944  VisitDeclContext(PID, false);
945  Out << "@end";
946}
947
948void DeclPrinter::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *PID) {
949  Out << "@implementation " << *PID->getClassInterface() << '(' << *PID <<")\n";
950
951  VisitDeclContext(PID, false);
952  Out << "@end";
953  // FIXME: implement the rest...
954}
955
956void DeclPrinter::VisitObjCCategoryDecl(ObjCCategoryDecl *PID) {
957  Out << "@interface " << *PID->getClassInterface() << '(' << *PID << ")\n";
958  VisitDeclContext(PID, false);
959  Out << "@end";
960
961  // FIXME: implement the rest...
962}
963
964void DeclPrinter::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *AID) {
965  Out << "@compatibility_alias " << *AID
966      << ' ' << *AID->getClassInterface() << ";\n";
967}
968
969/// PrintObjCPropertyDecl - print a property declaration.
970///
971void DeclPrinter::VisitObjCPropertyDecl(ObjCPropertyDecl *PDecl) {
972  if (PDecl->getPropertyImplementation() == ObjCPropertyDecl::Required)
973    Out << "@required\n";
974  else if (PDecl->getPropertyImplementation() == ObjCPropertyDecl::Optional)
975    Out << "@optional\n";
976
977  Out << "@property";
978  if (PDecl->getPropertyAttributes() != ObjCPropertyDecl::OBJC_PR_noattr) {
979    bool first = true;
980    Out << " (";
981    if (PDecl->getPropertyAttributes() &
982        ObjCPropertyDecl::OBJC_PR_readonly) {
983      Out << (first ? ' ' : ',') << "readonly";
984      first = false;
985    }
986
987    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) {
988      Out << (first ? ' ' : ',') << "getter = "
989          << PDecl->getGetterName().getAsString();
990      first = false;
991    }
992    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) {
993      Out << (first ? ' ' : ',') << "setter = "
994          << PDecl->getSetterName().getAsString();
995      first = false;
996    }
997
998    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_assign) {
999      Out << (first ? ' ' : ',') << "assign";
1000      first = false;
1001    }
1002
1003    if (PDecl->getPropertyAttributes() &
1004        ObjCPropertyDecl::OBJC_PR_readwrite) {
1005      Out << (first ? ' ' : ',') << "readwrite";
1006      first = false;
1007    }
1008
1009    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_retain) {
1010      Out << (first ? ' ' : ',') << "retain";
1011      first = false;
1012    }
1013
1014    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_strong) {
1015      Out << (first ? ' ' : ',') << "strong";
1016      first = false;
1017    }
1018
1019    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_copy) {
1020      Out << (first ? ' ' : ',') << "copy";
1021      first = false;
1022    }
1023
1024    if (PDecl->getPropertyAttributes() &
1025        ObjCPropertyDecl::OBJC_PR_nonatomic) {
1026      Out << (first ? ' ' : ',') << "nonatomic";
1027      first = false;
1028    }
1029    if (PDecl->getPropertyAttributes() &
1030        ObjCPropertyDecl::OBJC_PR_atomic) {
1031      Out << (first ? ' ' : ',') << "atomic";
1032      first = false;
1033    }
1034
1035    (void) first; // Silence dead store warning due to idiomatic code.
1036    Out << " )";
1037  }
1038  Out << ' ' << PDecl->getType().getAsString(Policy) << ' ' << *PDecl;
1039}
1040
1041void DeclPrinter::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *PID) {
1042  if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize)
1043    Out << "@synthesize ";
1044  else
1045    Out << "@dynamic ";
1046  Out << *PID->getPropertyDecl();
1047  if (PID->getPropertyIvarDecl())
1048    Out << '=' << *PID->getPropertyIvarDecl();
1049}
1050
1051void DeclPrinter::VisitUsingDecl(UsingDecl *D) {
1052  Out << "using ";
1053  D->getQualifier()->print(Out, Policy);
1054  Out << *D;
1055}
1056
1057void
1058DeclPrinter::VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D) {
1059  Out << "using typename ";
1060  D->getQualifier()->print(Out, Policy);
1061  Out << D->getDeclName();
1062}
1063
1064void DeclPrinter::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
1065  Out << "using ";
1066  D->getQualifier()->print(Out, Policy);
1067  Out << D->getDeclName();
1068}
1069
1070void DeclPrinter::VisitUsingShadowDecl(UsingShadowDecl *D) {
1071  // ignore
1072}
1073