DeclPrinter.cpp revision 581deb3da481053c4993c7600f97acf7768caac5 
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  if (!Policy.SuppressSpecifiers) {
326    Out << "typedef ";
327
328    if (D->isModulePrivate())
329      Out << "__module_private__ ";
330  }
331  D->getUnderlyingType().print(Out, Policy, D->getName());
332  prettyPrintAttributes(D);
333}
334
335void DeclPrinter::VisitTypeAliasDecl(TypeAliasDecl *D) {
336  Out << "using " << *D << " = " << D->getUnderlyingType().getAsString(Policy);
337}
338
339void DeclPrinter::VisitEnumDecl(EnumDecl *D) {
340  if (!Policy.SuppressSpecifiers && D->isModulePrivate())
341    Out << "__module_private__ ";
342  Out << "enum ";
343  if (D->isScoped()) {
344    if (D->isScopedUsingClassTag())
345      Out << "class ";
346    else
347      Out << "struct ";
348  }
349  Out << *D;
350
351  if (D->isFixed())
352    Out << " : " << D->getIntegerType().stream(Policy);
353
354  if (D->isCompleteDefinition()) {
355    Out << " {\n";
356    VisitDeclContext(D);
357    Indent() << "}";
358  }
359  prettyPrintAttributes(D);
360}
361
362void DeclPrinter::VisitRecordDecl(RecordDecl *D) {
363  if (!Policy.SuppressSpecifiers && D->isModulePrivate())
364    Out << "__module_private__ ";
365  Out << D->getKindName();
366  if (D->getIdentifier())
367    Out << ' ' << *D;
368
369  if (D->isCompleteDefinition()) {
370    Out << " {\n";
371    VisitDeclContext(D);
372    Indent() << "}";
373  }
374}
375
376void DeclPrinter::VisitEnumConstantDecl(EnumConstantDecl *D) {
377  Out << *D;
378  if (Expr *Init = D->getInitExpr()) {
379    Out << " = ";
380    Init->printPretty(Out, Context, 0, Policy, Indentation);
381  }
382}
383
384void DeclPrinter::VisitFunctionDecl(FunctionDecl *D) {
385  if (!Policy.SuppressSpecifiers) {
386    switch (D->getStorageClassAsWritten()) {
387    case SC_None: break;
388    case SC_Extern: Out << "extern "; break;
389    case SC_Static: Out << "static "; break;
390    case SC_PrivateExtern: Out << "__private_extern__ "; break;
391    case SC_Auto: case SC_Register: case SC_OpenCLWorkGroupLocal:
392      llvm_unreachable("invalid for functions");
393    }
394
395    if (D->isInlineSpecified())  Out << "inline ";
396    if (D->isVirtualAsWritten()) Out << "virtual ";
397    if (D->isModulePrivate())    Out << "__module_private__ ";
398  }
399
400  PrintingPolicy SubPolicy(Policy);
401  SubPolicy.SuppressSpecifiers = false;
402  std::string Proto = D->getNameInfo().getAsString();
403
404  QualType Ty = D->getType();
405  while (const ParenType *PT = dyn_cast<ParenType>(Ty)) {
406    Proto = '(' + Proto + ')';
407    Ty = PT->getInnerType();
408  }
409
410  if (isa<FunctionType>(Ty)) {
411    const FunctionType *AFT = Ty->getAs<FunctionType>();
412    const FunctionProtoType *FT = 0;
413    if (D->hasWrittenPrototype())
414      FT = dyn_cast<FunctionProtoType>(AFT);
415
416    Proto += "(";
417    if (FT) {
418      llvm::raw_string_ostream POut(Proto);
419      DeclPrinter ParamPrinter(POut, Context, SubPolicy, Indentation);
420      for (unsigned i = 0, e = D->getNumParams(); i != e; ++i) {
421        if (i) POut << ", ";
422        ParamPrinter.VisitParmVarDecl(D->getParamDecl(i));
423      }
424
425      if (FT->isVariadic()) {
426        if (D->getNumParams()) POut << ", ";
427        POut << "...";
428      }
429    } else if (D->doesThisDeclarationHaveABody() && !D->hasPrototype()) {
430      for (unsigned i = 0, e = D->getNumParams(); i != e; ++i) {
431        if (i)
432          Proto += ", ";
433        Proto += D->getParamDecl(i)->getNameAsString();
434      }
435    }
436
437    Proto += ")";
438
439    if (FT && FT->getTypeQuals()) {
440      unsigned TypeQuals = FT->getTypeQuals();
441      if (TypeQuals & Qualifiers::Const)
442        Proto += " const";
443      if (TypeQuals & Qualifiers::Volatile)
444        Proto += " volatile";
445      if (TypeQuals & Qualifiers::Restrict)
446        Proto += " restrict";
447    }
448
449    if (FT && FT->hasDynamicExceptionSpec()) {
450      Proto += " throw(";
451      if (FT->getExceptionSpecType() == EST_MSAny)
452        Proto += "...";
453      else
454        for (unsigned I = 0, N = FT->getNumExceptions(); I != N; ++I) {
455          if (I)
456            Proto += ", ";
457
458          Proto += FT->getExceptionType(I).getAsString(SubPolicy);;
459        }
460      Proto += ")";
461    } else if (FT && isNoexceptExceptionSpec(FT->getExceptionSpecType())) {
462      Proto += " noexcept";
463      if (FT->getExceptionSpecType() == EST_ComputedNoexcept) {
464        Proto += "(";
465        llvm::raw_string_ostream EOut(Proto);
466        FT->getNoexceptExpr()->printPretty(EOut, Context, 0, SubPolicy,
467                                           Indentation);
468        EOut.flush();
469        Proto += EOut.str();
470        Proto += ")";
471      }
472    }
473
474    if (CXXConstructorDecl *CDecl = dyn_cast<CXXConstructorDecl>(D)) {
475      bool HasInitializerList = false;
476      for (CXXConstructorDecl::init_const_iterator B = CDecl->init_begin(),
477           E = CDecl->init_end();
478           B != E; ++B) {
479        CXXCtorInitializer * BMInitializer = (*B);
480        if (BMInitializer->isInClassMemberInitializer())
481          continue;
482
483        if (!HasInitializerList) {
484          Proto += " : ";
485          Out << Proto;
486          Proto.clear();
487          HasInitializerList = true;
488        } else
489          Out << ", ";
490
491        if (BMInitializer->isAnyMemberInitializer()) {
492          FieldDecl *FD = BMInitializer->getAnyMember();
493          Out << *FD;
494        } else {
495          Out << QualType(BMInitializer->getBaseClass(), 0).getAsString(Policy);
496        }
497
498        Out << "(";
499        if (!BMInitializer->getInit()) {
500          // Nothing to print
501        } else {
502          Expr *Init = BMInitializer->getInit();
503          if (ExprWithCleanups *Tmp = dyn_cast<ExprWithCleanups>(Init))
504            Init = Tmp->getSubExpr();
505
506          Init = Init->IgnoreParens();
507
508          Expr *SimpleInit = 0;
509          Expr **Args = 0;
510          unsigned NumArgs = 0;
511          if (ParenListExpr *ParenList = dyn_cast<ParenListExpr>(Init)) {
512            Args = ParenList->getExprs();
513            NumArgs = ParenList->getNumExprs();
514          } else if (CXXConstructExpr *Construct
515                                        = dyn_cast<CXXConstructExpr>(Init)) {
516            Args = Construct->getArgs();
517            NumArgs = Construct->getNumArgs();
518          } else
519            SimpleInit = Init;
520
521          if (SimpleInit)
522            SimpleInit->printPretty(Out, Context, 0, Policy, Indentation);
523          else {
524            for (unsigned I = 0; I != NumArgs; ++I) {
525              if (isa<CXXDefaultArgExpr>(Args[I]))
526                break;
527
528              if (I)
529                Out << ", ";
530              Args[I]->printPretty(Out, Context, 0, Policy, Indentation);
531            }
532          }
533        }
534        Out << ")";
535      }
536    }
537    else
538      AFT->getResultType().print(Out, Policy, Proto);
539  } else {
540    Ty.print(Out, Policy, Proto);
541  }
542
543  prettyPrintAttributes(D);
544
545  if (D->isPure())
546    Out << " = 0";
547  else if (D->isDeletedAsWritten())
548    Out << " = delete";
549  else if (D->doesThisDeclarationHaveABody()) {
550    if (!D->hasPrototype() && D->getNumParams()) {
551      // This is a K&R function definition, so we need to print the
552      // parameters.
553      Out << '\n';
554      DeclPrinter ParamPrinter(Out, Context, SubPolicy, Indentation);
555      Indentation += Policy.Indentation;
556      for (unsigned i = 0, e = D->getNumParams(); i != e; ++i) {
557        Indent();
558        ParamPrinter.VisitParmVarDecl(D->getParamDecl(i));
559        Out << ";\n";
560      }
561      Indentation -= Policy.Indentation;
562    } else
563      Out << ' ';
564
565    D->getBody()->printPretty(Out, Context, 0, SubPolicy, Indentation);
566    Out << '\n';
567  }
568}
569
570void DeclPrinter::VisitFieldDecl(FieldDecl *D) {
571  if (!Policy.SuppressSpecifiers && D->isMutable())
572    Out << "mutable ";
573  if (!Policy.SuppressSpecifiers && D->isModulePrivate())
574    Out << "__module_private__ ";
575
576  Out << D->getType().stream(Policy, D->getName());
577
578  if (D->isBitField()) {
579    Out << " : ";
580    D->getBitWidth()->printPretty(Out, Context, 0, Policy, Indentation);
581  }
582
583  Expr *Init = D->getInClassInitializer();
584  if (!Policy.SuppressInitializers && Init) {
585    Out << " = ";
586    Init->printPretty(Out, Context, 0, Policy, Indentation);
587  }
588  prettyPrintAttributes(D);
589}
590
591void DeclPrinter::VisitLabelDecl(LabelDecl *D) {
592  Out << *D << ":";
593}
594
595
596void DeclPrinter::VisitVarDecl(VarDecl *D) {
597  StorageClass SCAsWritten = D->getStorageClassAsWritten();
598  if (!Policy.SuppressSpecifiers && SCAsWritten != SC_None)
599    Out << VarDecl::getStorageClassSpecifierString(SCAsWritten) << " ";
600
601  if (!Policy.SuppressSpecifiers && D->isThreadSpecified())
602    Out << "__thread ";
603  if (!Policy.SuppressSpecifiers && D->isModulePrivate())
604    Out << "__module_private__ ";
605
606  QualType T = D->getType();
607  if (ParmVarDecl *Parm = dyn_cast<ParmVarDecl>(D))
608    T = Parm->getOriginalType();
609  T.print(Out, Policy, D->getName());
610  Expr *Init = D->getInit();
611  if (!Policy.SuppressInitializers && Init) {
612    bool ImplicitInit = false;
613    if (CXXConstructExpr *Construct = dyn_cast<CXXConstructExpr>(Init))
614      ImplicitInit = D->getInitStyle() == VarDecl::CallInit &&
615          Construct->getNumArgs() == 0 && !Construct->isListInitialization();
616    if (!ImplicitInit) {
617      if (D->getInitStyle() == VarDecl::CallInit)
618        Out << "(";
619      else if (D->getInitStyle() == VarDecl::CInit) {
620        Out << " = ";
621      }
622      Init->printPretty(Out, Context, 0, Policy, Indentation);
623      if (D->getInitStyle() == VarDecl::CallInit)
624        Out << ")";
625    }
626  }
627  prettyPrintAttributes(D);
628}
629
630void DeclPrinter::VisitParmVarDecl(ParmVarDecl *D) {
631  VisitVarDecl(D);
632}
633
634void DeclPrinter::VisitFileScopeAsmDecl(FileScopeAsmDecl *D) {
635  Out << "__asm (";
636  D->getAsmString()->printPretty(Out, Context, 0, Policy, Indentation);
637  Out << ")";
638}
639
640void DeclPrinter::VisitImportDecl(ImportDecl *D) {
641  Out << "@__experimental_modules_import " << D->getImportedModule()->getFullModuleName()
642      << ";\n";
643}
644
645void DeclPrinter::VisitStaticAssertDecl(StaticAssertDecl *D) {
646  Out << "static_assert(";
647  D->getAssertExpr()->printPretty(Out, Context, 0, Policy, Indentation);
648  Out << ", ";
649  D->getMessage()->printPretty(Out, Context, 0, Policy, Indentation);
650  Out << ")";
651}
652
653//----------------------------------------------------------------------------
654// C++ declarations
655//----------------------------------------------------------------------------
656void DeclPrinter::VisitNamespaceDecl(NamespaceDecl *D) {
657  if (D->isInline())
658    Out << "inline ";
659  Out << "namespace " << *D << " {\n";
660  VisitDeclContext(D);
661  Indent() << "}";
662}
663
664void DeclPrinter::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
665  Out << "using namespace ";
666  if (D->getQualifier())
667    D->getQualifier()->print(Out, Policy);
668  Out << *D->getNominatedNamespaceAsWritten();
669}
670
671void DeclPrinter::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
672  Out << "namespace " << *D << " = ";
673  if (D->getQualifier())
674    D->getQualifier()->print(Out, Policy);
675  Out << *D->getAliasedNamespace();
676}
677
678void DeclPrinter::VisitCXXRecordDecl(CXXRecordDecl *D) {
679  if (!Policy.SuppressSpecifiers && D->isModulePrivate())
680    Out << "__module_private__ ";
681  Out << D->getKindName();
682  if (D->getIdentifier())
683    Out << ' ' << *D;
684
685  if (D->isCompleteDefinition()) {
686    // Print the base classes
687    if (D->getNumBases()) {
688      Out << " : ";
689      for (CXXRecordDecl::base_class_iterator Base = D->bases_begin(),
690             BaseEnd = D->bases_end(); Base != BaseEnd; ++Base) {
691        if (Base != D->bases_begin())
692          Out << ", ";
693
694        if (Base->isVirtual())
695          Out << "virtual ";
696
697        AccessSpecifier AS = Base->getAccessSpecifierAsWritten();
698        if (AS != AS_none)
699          Print(AS);
700        Out << " " << Base->getType().getAsString(Policy);
701
702        if (Base->isPackExpansion())
703          Out << "...";
704      }
705    }
706
707    // Print the class definition
708    // FIXME: Doesn't print access specifiers, e.g., "public:"
709    Out << " {\n";
710    VisitDeclContext(D);
711    Indent() << "}";
712  }
713}
714
715void DeclPrinter::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
716  const char *l;
717  if (D->getLanguage() == LinkageSpecDecl::lang_c)
718    l = "C";
719  else {
720    assert(D->getLanguage() == LinkageSpecDecl::lang_cxx &&
721           "unknown language in linkage specification");
722    l = "C++";
723  }
724
725  Out << "extern \"" << l << "\" ";
726  if (D->hasBraces()) {
727    Out << "{\n";
728    VisitDeclContext(D);
729    Indent() << "}";
730  } else
731    Visit(*D->decls_begin());
732}
733
734void DeclPrinter::PrintTemplateParameters(
735    const TemplateParameterList *Params, const TemplateArgumentList *Args = 0) {
736  assert(Params);
737  assert(!Args || Params->size() == Args->size());
738
739  Out << "template <";
740
741  for (unsigned i = 0, e = Params->size(); i != e; ++i) {
742    if (i != 0)
743      Out << ", ";
744
745    const Decl *Param = Params->getParam(i);
746    if (const TemplateTypeParmDecl *TTP =
747          dyn_cast<TemplateTypeParmDecl>(Param)) {
748
749      if (TTP->wasDeclaredWithTypename())
750        Out << "typename ";
751      else
752        Out << "class ";
753
754      if (TTP->isParameterPack())
755        Out << "... ";
756
757      Out << *TTP;
758
759      if (Args) {
760        Out << " = ";
761        Args->get(i).print(Policy, Out);
762      } else if (TTP->hasDefaultArgument()) {
763        Out << " = ";
764        Out << TTP->getDefaultArgument().getAsString(Policy);
765      };
766    } else if (const NonTypeTemplateParmDecl *NTTP =
767                 dyn_cast<NonTypeTemplateParmDecl>(Param)) {
768      Out << NTTP->getType().getAsString(Policy);
769
770      if (NTTP->isParameterPack() && !isa<PackExpansionType>(NTTP->getType()))
771        Out << "...";
772
773      if (IdentifierInfo *Name = NTTP->getIdentifier()) {
774        Out << ' ';
775        Out << Name->getName();
776      }
777
778      if (Args) {
779        Out << " = ";
780        Args->get(i).print(Policy, Out);
781      } else if (NTTP->hasDefaultArgument()) {
782        Out << " = ";
783        NTTP->getDefaultArgument()->printPretty(Out, Context, 0, Policy,
784                                                Indentation);
785      }
786    } else if (const TemplateTemplateParmDecl *TTPD =
787                 dyn_cast<TemplateTemplateParmDecl>(Param)) {
788      VisitTemplateDecl(TTPD);
789      // FIXME: print the default argument, if present.
790    }
791  }
792
793  Out << "> ";
794}
795
796void DeclPrinter::VisitTemplateDecl(const TemplateDecl *D) {
797  PrintTemplateParameters(D->getTemplateParameters());
798
799  if (const TemplateTemplateParmDecl *TTP =
800        dyn_cast<TemplateTemplateParmDecl>(D)) {
801    Out << "class ";
802    if (TTP->isParameterPack())
803      Out << "...";
804    Out << D->getName();
805  } else {
806    Visit(D->getTemplatedDecl());
807  }
808}
809
810void DeclPrinter::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
811  if (PrintInstantiation) {
812    TemplateParameterList *Params = D->getTemplateParameters();
813    for (FunctionTemplateDecl::spec_iterator I = D->spec_begin(), E = D->spec_end();
814         I != E; ++I) {
815      PrintTemplateParameters(Params, (*I)->getTemplateSpecializationArgs());
816      Visit(*I);
817    }
818  }
819
820  return VisitRedeclarableTemplateDecl(D);
821}
822
823void DeclPrinter::VisitClassTemplateDecl(ClassTemplateDecl *D) {
824  if (PrintInstantiation) {
825    TemplateParameterList *Params = D->getTemplateParameters();
826    for (ClassTemplateDecl::spec_iterator I = D->spec_begin(), E = D->spec_end();
827         I != E; ++I) {
828      PrintTemplateParameters(Params, &(*I)->getTemplateArgs());
829      Visit(*I);
830      Out << '\n';
831    }
832  }
833
834  return VisitRedeclarableTemplateDecl(D);
835}
836
837//----------------------------------------------------------------------------
838// Objective-C declarations
839//----------------------------------------------------------------------------
840
841void DeclPrinter::VisitObjCMethodDecl(ObjCMethodDecl *OMD) {
842  if (OMD->isInstanceMethod())
843    Out << "- ";
844  else
845    Out << "+ ";
846  if (!OMD->getResultType().isNull())
847    Out << '(' << OMD->getResultType().getAsString(Policy) << ")";
848
849  std::string name = OMD->getSelector().getAsString();
850  std::string::size_type pos, lastPos = 0;
851  for (ObjCMethodDecl::param_iterator PI = OMD->param_begin(),
852       E = OMD->param_end(); PI != E; ++PI) {
853    // FIXME: selector is missing here!
854    pos = name.find_first_of(':', lastPos);
855    Out << " " << name.substr(lastPos, pos - lastPos);
856    Out << ":(" << (*PI)->getType().getAsString(Policy) << ')' << **PI;
857    lastPos = pos + 1;
858  }
859
860  if (OMD->param_begin() == OMD->param_end())
861    Out << " " << name;
862
863  if (OMD->isVariadic())
864      Out << ", ...";
865
866  if (OMD->getBody()) {
867    Out << ' ';
868    OMD->getBody()->printPretty(Out, Context, 0, Policy);
869    Out << '\n';
870  }
871}
872
873void DeclPrinter::VisitObjCImplementationDecl(ObjCImplementationDecl *OID) {
874  std::string I = OID->getNameAsString();
875  ObjCInterfaceDecl *SID = OID->getSuperClass();
876
877  if (SID)
878    Out << "@implementation " << I << " : " << *SID;
879  else
880    Out << "@implementation " << I;
881  Out << "\n";
882  VisitDeclContext(OID, false);
883  Out << "@end";
884}
885
886void DeclPrinter::VisitObjCInterfaceDecl(ObjCInterfaceDecl *OID) {
887  std::string I = OID->getNameAsString();
888  ObjCInterfaceDecl *SID = OID->getSuperClass();
889
890  if (!OID->isThisDeclarationADefinition()) {
891    Out << "@class " << I << ";";
892    return;
893  }
894
895  if (SID)
896    Out << "@interface " << I << " : " << *SID;
897  else
898    Out << "@interface " << I;
899
900  // Protocols?
901  const ObjCList<ObjCProtocolDecl> &Protocols = OID->getReferencedProtocols();
902  if (!Protocols.empty()) {
903    for (ObjCList<ObjCProtocolDecl>::iterator I = Protocols.begin(),
904         E = Protocols.end(); I != E; ++I)
905      Out << (I == Protocols.begin() ? '<' : ',') << **I;
906  }
907
908  if (!Protocols.empty())
909    Out << "> ";
910
911  if (OID->ivar_size() > 0) {
912    Out << "{\n";
913    Indentation += Policy.Indentation;
914    for (ObjCInterfaceDecl::ivar_iterator I = OID->ivar_begin(),
915         E = OID->ivar_end(); I != E; ++I) {
916      Indent() << I->getType().getAsString(Policy) << ' ' << **I << ";\n";
917    }
918    Indentation -= Policy.Indentation;
919    Out << "}\n";
920  }
921
922  VisitDeclContext(OID, false);
923  Out << "@end";
924  // FIXME: implement the rest...
925}
926
927void DeclPrinter::VisitObjCProtocolDecl(ObjCProtocolDecl *PID) {
928  if (!PID->isThisDeclarationADefinition()) {
929    Out << "@protocol " << PID->getIdentifier() << ";\n";
930    return;
931  }
932
933  Out << "@protocol " << *PID << '\n';
934  VisitDeclContext(PID, false);
935  Out << "@end";
936}
937
938void DeclPrinter::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *PID) {
939  Out << "@implementation " << *PID->getClassInterface() << '(' << *PID <<")\n";
940
941  VisitDeclContext(PID, false);
942  Out << "@end";
943  // FIXME: implement the rest...
944}
945
946void DeclPrinter::VisitObjCCategoryDecl(ObjCCategoryDecl *PID) {
947  Out << "@interface " << *PID->getClassInterface() << '(' << *PID << ")\n";
948  VisitDeclContext(PID, false);
949  Out << "@end";
950
951  // FIXME: implement the rest...
952}
953
954void DeclPrinter::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *AID) {
955  Out << "@compatibility_alias " << *AID
956      << ' ' << *AID->getClassInterface() << ";\n";
957}
958
959/// PrintObjCPropertyDecl - print a property declaration.
960///
961void DeclPrinter::VisitObjCPropertyDecl(ObjCPropertyDecl *PDecl) {
962  if (PDecl->getPropertyImplementation() == ObjCPropertyDecl::Required)
963    Out << "@required\n";
964  else if (PDecl->getPropertyImplementation() == ObjCPropertyDecl::Optional)
965    Out << "@optional\n";
966
967  Out << "@property";
968  if (PDecl->getPropertyAttributes() != ObjCPropertyDecl::OBJC_PR_noattr) {
969    bool first = true;
970    Out << " (";
971    if (PDecl->getPropertyAttributes() &
972        ObjCPropertyDecl::OBJC_PR_readonly) {
973      Out << (first ? ' ' : ',') << "readonly";
974      first = false;
975    }
976
977    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) {
978      Out << (first ? ' ' : ',') << "getter = "
979          << PDecl->getGetterName().getAsString();
980      first = false;
981    }
982    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) {
983      Out << (first ? ' ' : ',') << "setter = "
984          << PDecl->getSetterName().getAsString();
985      first = false;
986    }
987
988    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_assign) {
989      Out << (first ? ' ' : ',') << "assign";
990      first = false;
991    }
992
993    if (PDecl->getPropertyAttributes() &
994        ObjCPropertyDecl::OBJC_PR_readwrite) {
995      Out << (first ? ' ' : ',') << "readwrite";
996      first = false;
997    }
998
999    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_retain) {
1000      Out << (first ? ' ' : ',') << "retain";
1001      first = false;
1002    }
1003
1004    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_strong) {
1005      Out << (first ? ' ' : ',') << "strong";
1006      first = false;
1007    }
1008
1009    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_copy) {
1010      Out << (first ? ' ' : ',') << "copy";
1011      first = false;
1012    }
1013
1014    if (PDecl->getPropertyAttributes() &
1015        ObjCPropertyDecl::OBJC_PR_nonatomic) {
1016      Out << (first ? ' ' : ',') << "nonatomic";
1017      first = false;
1018    }
1019    if (PDecl->getPropertyAttributes() &
1020        ObjCPropertyDecl::OBJC_PR_atomic) {
1021      Out << (first ? ' ' : ',') << "atomic";
1022      first = false;
1023    }
1024
1025    (void) first; // Silence dead store warning due to idiomatic code.
1026    Out << " )";
1027  }
1028  Out << ' ' << PDecl->getType().getAsString(Policy) << ' ' << *PDecl;
1029}
1030
1031void DeclPrinter::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *PID) {
1032  if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize)
1033    Out << "@synthesize ";
1034  else
1035    Out << "@dynamic ";
1036  Out << *PID->getPropertyDecl();
1037  if (PID->getPropertyIvarDecl())
1038    Out << '=' << *PID->getPropertyIvarDecl();
1039}
1040
1041void DeclPrinter::VisitUsingDecl(UsingDecl *D) {
1042  Out << "using ";
1043  D->getQualifier()->print(Out, Policy);
1044  Out << *D;
1045}
1046
1047void
1048DeclPrinter::VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D) {
1049  Out << "using typename ";
1050  D->getQualifier()->print(Out, Policy);
1051  Out << D->getDeclName();
1052}
1053
1054void DeclPrinter::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
1055  Out << "using ";
1056  D->getQualifier()->print(Out, Policy);
1057  Out << D->getDeclName();
1058}
1059
1060void DeclPrinter::VisitUsingShadowDecl(UsingShadowDecl *D) {
1061  // ignore
1062}
1063