xref: /llvm-project/clang/lib/AST/DeclPrinter.cpp (revision 223e2efa5e886502a9467b7ef700ebce9b7886e8) 
1 //===--- DeclPrinter.cpp - Printing implementation for Decl ASTs ----------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file implements the Decl::print method, which pretty prints the
10 // AST back out to C/Objective-C/C++/Objective-C++ code.
11 //
12 //===----------------------------------------------------------------------===//
13 #include "clang/AST/ASTContext.h"
14 #include "clang/AST/Attr.h"
15 #include "clang/AST/Decl.h"
16 #include "clang/AST/DeclCXX.h"
17 #include "clang/AST/DeclObjC.h"
18 #include "clang/AST/DeclTemplate.h"
19 #include "clang/AST/DeclVisitor.h"
20 #include "clang/AST/Expr.h"
21 #include "clang/AST/ExprCXX.h"
22 #include "clang/AST/PrettyPrinter.h"
23 #include "clang/Basic/Module.h"
24 #include "clang/Basic/SourceManager.h"
25 #include "llvm/Support/raw_ostream.h"
26 using namespace clang;
27 
28 namespace {
29   class DeclPrinter : public DeclVisitor<DeclPrinter> {
30     raw_ostream &Out;
31     PrintingPolicy Policy;
32     const ASTContext &Context;
33     unsigned Indentation;
34     bool PrintInstantiation;
35 
36     raw_ostream& Indent() { return Indent(Indentation); }
37     raw_ostream& Indent(unsigned Indentation);
38     void ProcessDeclGroup(SmallVectorImpl<Decl*>& Decls);
39 
40     void Print(AccessSpecifier AS);
41     void PrintConstructorInitializers(CXXConstructorDecl *CDecl,
42                                       std::string &Proto);
43 
44     /// Print an Objective-C method type in parentheses.
45     ///
46     /// \param Quals The Objective-C declaration qualifiers.
47     /// \param T The type to print.
48     void PrintObjCMethodType(ASTContext &Ctx, Decl::ObjCDeclQualifier Quals,
49                              QualType T);
50 
51     void PrintObjCTypeParams(ObjCTypeParamList *Params);
52 
53   public:
54     DeclPrinter(raw_ostream &Out, const PrintingPolicy &Policy,
55                 const ASTContext &Context, unsigned Indentation = 0,
56                 bool PrintInstantiation = false)
57         : Out(Out), Policy(Policy), Context(Context), Indentation(Indentation),
58           PrintInstantiation(PrintInstantiation) {}
59 
60     void VisitDeclContext(DeclContext *DC, bool Indent = true);
61 
62     void VisitTranslationUnitDecl(TranslationUnitDecl *D);
63     void VisitTypedefDecl(TypedefDecl *D);
64     void VisitTypeAliasDecl(TypeAliasDecl *D);
65     void VisitEnumDecl(EnumDecl *D);
66     void VisitRecordDecl(RecordDecl *D);
67     void VisitEnumConstantDecl(EnumConstantDecl *D);
68     void VisitEmptyDecl(EmptyDecl *D);
69     void VisitFunctionDecl(FunctionDecl *D);
70     void VisitFriendDecl(FriendDecl *D);
71     void VisitFieldDecl(FieldDecl *D);
72     void VisitVarDecl(VarDecl *D);
73     void VisitLabelDecl(LabelDecl *D);
74     void VisitParmVarDecl(ParmVarDecl *D);
75     void VisitFileScopeAsmDecl(FileScopeAsmDecl *D);
76     void VisitTopLevelStmtDecl(TopLevelStmtDecl *D);
77     void VisitImportDecl(ImportDecl *D);
78     void VisitStaticAssertDecl(StaticAssertDecl *D);
79     void VisitNamespaceDecl(NamespaceDecl *D);
80     void VisitUsingDirectiveDecl(UsingDirectiveDecl *D);
81     void VisitNamespaceAliasDecl(NamespaceAliasDecl *D);
82     void VisitCXXRecordDecl(CXXRecordDecl *D);
83     void VisitLinkageSpecDecl(LinkageSpecDecl *D);
84     void VisitTemplateDecl(const TemplateDecl *D);
85     void VisitFunctionTemplateDecl(FunctionTemplateDecl *D);
86     void VisitClassTemplateDecl(ClassTemplateDecl *D);
87     void VisitClassTemplateSpecializationDecl(
88                                             ClassTemplateSpecializationDecl *D);
89     void VisitClassTemplatePartialSpecializationDecl(
90                                      ClassTemplatePartialSpecializationDecl *D);
91     void VisitObjCMethodDecl(ObjCMethodDecl *D);
92     void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
93     void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
94     void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
95     void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
96     void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
97     void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
98     void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
99     void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
100     void VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D);
101     void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D);
102     void VisitUsingDecl(UsingDecl *D);
103     void VisitUsingEnumDecl(UsingEnumDecl *D);
104     void VisitUsingShadowDecl(UsingShadowDecl *D);
105     void VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D);
106     void VisitOMPAllocateDecl(OMPAllocateDecl *D);
107     void VisitOMPRequiresDecl(OMPRequiresDecl *D);
108     void VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D);
109     void VisitOMPDeclareMapperDecl(OMPDeclareMapperDecl *D);
110     void VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D);
111     void VisitTemplateTypeParmDecl(const TemplateTypeParmDecl *TTP);
112     void VisitNonTypeTemplateParmDecl(const NonTypeTemplateParmDecl *NTTP);
113     void VisitHLSLBufferDecl(HLSLBufferDecl *D);
114 
115     void printTemplateParameters(const TemplateParameterList *Params,
116                                  bool OmitTemplateKW = false);
117     void printTemplateArguments(llvm::ArrayRef<TemplateArgument> Args,
118                                 const TemplateParameterList *Params);
119     void printTemplateArguments(llvm::ArrayRef<TemplateArgumentLoc> Args,
120                                 const TemplateParameterList *Params);
121     enum class AttrPosAsWritten { Default = 0, Left, Right };
122     bool
123     prettyPrintAttributes(const Decl *D,
124                           AttrPosAsWritten Pos = AttrPosAsWritten::Default);
125     void prettyPrintPragmas(Decl *D);
126     void printDeclType(QualType T, StringRef DeclName, bool Pack = false);
127   };
128 }
129 
130 void Decl::print(raw_ostream &Out, unsigned Indentation,
131                  bool PrintInstantiation) const {
132   print(Out, getASTContext().getPrintingPolicy(), Indentation, PrintInstantiation);
133 }
134 
135 void Decl::print(raw_ostream &Out, const PrintingPolicy &Policy,
136                  unsigned Indentation, bool PrintInstantiation) const {
137   DeclPrinter Printer(Out, Policy, getASTContext(), Indentation,
138                       PrintInstantiation);
139   Printer.Visit(const_cast<Decl*>(this));
140 }
141 
142 void TemplateParameterList::print(raw_ostream &Out, const ASTContext &Context,
143                                   bool OmitTemplateKW) const {
144   print(Out, Context, Context.getPrintingPolicy(), OmitTemplateKW);
145 }
146 
147 void TemplateParameterList::print(raw_ostream &Out, const ASTContext &Context,
148                                   const PrintingPolicy &Policy,
149                                   bool OmitTemplateKW) const {
150   DeclPrinter Printer(Out, Policy, Context);
151   Printer.printTemplateParameters(this, OmitTemplateKW);
152 }
153 
154 static QualType GetBaseType(QualType T) {
155   // FIXME: This should be on the Type class!
156   QualType BaseType = T;
157   while (!BaseType->isSpecifierType()) {
158     if (const PointerType *PTy = BaseType->getAs<PointerType>())
159       BaseType = PTy->getPointeeType();
160     else if (const ObjCObjectPointerType *OPT =
161                  BaseType->getAs<ObjCObjectPointerType>())
162       BaseType = OPT->getPointeeType();
163     else if (const BlockPointerType *BPy = BaseType->getAs<BlockPointerType>())
164       BaseType = BPy->getPointeeType();
165     else if (const ArrayType *ATy = dyn_cast<ArrayType>(BaseType))
166       BaseType = ATy->getElementType();
167     else if (const FunctionType *FTy = BaseType->getAs<FunctionType>())
168       BaseType = FTy->getReturnType();
169     else if (const VectorType *VTy = BaseType->getAs<VectorType>())
170       BaseType = VTy->getElementType();
171     else if (const ReferenceType *RTy = BaseType->getAs<ReferenceType>())
172       BaseType = RTy->getPointeeType();
173     else if (const AutoType *ATy = BaseType->getAs<AutoType>())
174       BaseType = ATy->getDeducedType();
175     else if (const ParenType *PTy = BaseType->getAs<ParenType>())
176       BaseType = PTy->desugar();
177     else
178       // This must be a syntax error.
179       break;
180   }
181   return BaseType;
182 }
183 
184 static QualType getDeclType(Decl* D) {
185   if (TypedefNameDecl* TDD = dyn_cast<TypedefNameDecl>(D))
186     return TDD->getUnderlyingType();
187   if (ValueDecl* VD = dyn_cast<ValueDecl>(D))
188     return VD->getType();
189   return QualType();
190 }
191 
192 void Decl::printGroup(Decl** Begin, unsigned NumDecls,
193                       raw_ostream &Out, const PrintingPolicy &Policy,
194                       unsigned Indentation) {
195   if (NumDecls == 1) {
196     (*Begin)->print(Out, Policy, Indentation);
197     return;
198   }
199 
200   Decl** End = Begin + NumDecls;
201   TagDecl* TD = dyn_cast<TagDecl>(*Begin);
202   if (TD)
203     ++Begin;
204 
205   PrintingPolicy SubPolicy(Policy);
206 
207   bool isFirst = true;
208   for ( ; Begin != End; ++Begin) {
209     if (isFirst) {
210       if(TD)
211         SubPolicy.IncludeTagDefinition = true;
212       SubPolicy.SuppressSpecifiers = false;
213       isFirst = false;
214     } else {
215       if (!isFirst) Out << ", ";
216       SubPolicy.IncludeTagDefinition = false;
217       SubPolicy.SuppressSpecifiers = true;
218     }
219 
220     (*Begin)->print(Out, SubPolicy, Indentation);
221   }
222 }
223 
224 LLVM_DUMP_METHOD void DeclContext::dumpDeclContext() const {
225   // Get the translation unit
226   const DeclContext *DC = this;
227   while (!DC->isTranslationUnit())
228     DC = DC->getParent();
229 
230   ASTContext &Ctx = cast<TranslationUnitDecl>(DC)->getASTContext();
231   DeclPrinter Printer(llvm::errs(), Ctx.getPrintingPolicy(), Ctx, 0);
232   Printer.VisitDeclContext(const_cast<DeclContext *>(this), /*Indent=*/false);
233 }
234 
235 raw_ostream& DeclPrinter::Indent(unsigned Indentation) {
236   for (unsigned i = 0; i != Indentation; ++i)
237     Out << "  ";
238   return Out;
239 }
240 
241 static DeclPrinter::AttrPosAsWritten getPosAsWritten(const Attr *A,
242                                                      const Decl *D) {
243   SourceLocation ALoc = A->getLoc();
244   SourceLocation DLoc = D->getLocation();
245   const ASTContext &C = D->getASTContext();
246   if (ALoc.isInvalid() || DLoc.isInvalid())
247     return DeclPrinter::AttrPosAsWritten::Left;
248 
249   if (C.getSourceManager().isBeforeInTranslationUnit(ALoc, DLoc))
250     return DeclPrinter::AttrPosAsWritten::Left;
251 
252   return DeclPrinter::AttrPosAsWritten::Right;
253 }
254 
255 // returns true if an attribute was printed.
256 bool DeclPrinter::prettyPrintAttributes(const Decl *D,
257                                         AttrPosAsWritten Pos /*=Default*/) {
258   bool hasPrinted = false;
259 
260   if (D->hasAttrs()) {
261     const AttrVec &Attrs = D->getAttrs();
262     for (auto *A : Attrs) {
263       if (A->isInherited() || A->isImplicit())
264         continue;
265       // Print out the keyword attributes, they aren't regular attributes.
266       if (Policy.PolishForDeclaration && !A->isKeywordAttribute())
267         continue;
268       switch (A->getKind()) {
269 #define ATTR(X)
270 #define PRAGMA_SPELLING_ATTR(X) case attr::X:
271 #include "clang/Basic/AttrList.inc"
272         break;
273       default:
274         AttrPosAsWritten APos = getPosAsWritten(A, D);
275         assert(APos != AttrPosAsWritten::Default &&
276                "Default not a valid for an attribute location");
277         if (Pos == AttrPosAsWritten::Default || Pos == APos) {
278           if (Pos != AttrPosAsWritten::Left)
279             Out << ' ';
280           A->printPretty(Out, Policy);
281           hasPrinted = true;
282           if (Pos == AttrPosAsWritten::Left)
283             Out << ' ';
284         }
285         break;
286       }
287     }
288   }
289   return hasPrinted;
290 }
291 
292 void DeclPrinter::prettyPrintPragmas(Decl *D) {
293   if (Policy.PolishForDeclaration)
294     return;
295 
296   if (D->hasAttrs()) {
297     AttrVec &Attrs = D->getAttrs();
298     for (auto *A : Attrs) {
299       switch (A->getKind()) {
300 #define ATTR(X)
301 #define PRAGMA_SPELLING_ATTR(X) case attr::X:
302 #include "clang/Basic/AttrList.inc"
303         A->printPretty(Out, Policy);
304         Indent();
305         break;
306       default:
307         break;
308       }
309     }
310   }
311 }
312 
313 void DeclPrinter::printDeclType(QualType T, StringRef DeclName, bool Pack) {
314   // Normally, a PackExpansionType is written as T[3]... (for instance, as a
315   // template argument), but if it is the type of a declaration, the ellipsis
316   // is placed before the name being declared.
317   if (auto *PET = T->getAs<PackExpansionType>()) {
318     Pack = true;
319     T = PET->getPattern();
320   }
321   T.print(Out, Policy, (Pack ? "..." : "") + DeclName, Indentation);
322 }
323 
324 void DeclPrinter::ProcessDeclGroup(SmallVectorImpl<Decl*>& Decls) {
325   this->Indent();
326   Decl::printGroup(Decls.data(), Decls.size(), Out, Policy, Indentation);
327   Out << ";\n";
328   Decls.clear();
329 
330 }
331 
332 void DeclPrinter::Print(AccessSpecifier AS) {
333   const auto AccessSpelling = getAccessSpelling(AS);
334   if (AccessSpelling.empty())
335     llvm_unreachable("No access specifier!");
336   Out << AccessSpelling;
337 }
338 
339 void DeclPrinter::PrintConstructorInitializers(CXXConstructorDecl *CDecl,
340                                                std::string &Proto) {
341   bool HasInitializerList = false;
342   for (const auto *BMInitializer : CDecl->inits()) {
343     if (BMInitializer->isInClassMemberInitializer())
344       continue;
345     if (!BMInitializer->isWritten())
346       continue;
347 
348     if (!HasInitializerList) {
349       Proto += " : ";
350       Out << Proto;
351       Proto.clear();
352       HasInitializerList = true;
353     } else
354       Out << ", ";
355 
356     if (BMInitializer->isAnyMemberInitializer()) {
357       FieldDecl *FD = BMInitializer->getAnyMember();
358       Out << *FD;
359     } else if (BMInitializer->isDelegatingInitializer()) {
360       Out << CDecl->getNameAsString();
361     } else {
362       Out << QualType(BMInitializer->getBaseClass(), 0).getAsString(Policy);
363     }
364 
365     if (Expr *Init = BMInitializer->getInit()) {
366       bool OutParens = !isa<InitListExpr>(Init);
367 
368       if (OutParens)
369         Out << "(";
370 
371       if (ExprWithCleanups *Tmp = dyn_cast<ExprWithCleanups>(Init))
372         Init = Tmp->getSubExpr();
373 
374       Init = Init->IgnoreParens();
375 
376       Expr *SimpleInit = nullptr;
377       Expr **Args = nullptr;
378       unsigned NumArgs = 0;
379       if (ParenListExpr *ParenList = dyn_cast<ParenListExpr>(Init)) {
380         Args = ParenList->getExprs();
381         NumArgs = ParenList->getNumExprs();
382       } else if (CXXConstructExpr *Construct =
383                      dyn_cast<CXXConstructExpr>(Init)) {
384         Args = Construct->getArgs();
385         NumArgs = Construct->getNumArgs();
386       } else
387         SimpleInit = Init;
388 
389       if (SimpleInit)
390         SimpleInit->printPretty(Out, nullptr, Policy, Indentation, "\n",
391                                 &Context);
392       else {
393         for (unsigned I = 0; I != NumArgs; ++I) {
394           assert(Args[I] != nullptr && "Expected non-null Expr");
395           if (isa<CXXDefaultArgExpr>(Args[I]))
396             break;
397 
398           if (I)
399             Out << ", ";
400           Args[I]->printPretty(Out, nullptr, Policy, Indentation, "\n",
401                                &Context);
402         }
403       }
404 
405       if (OutParens)
406         Out << ")";
407     } else {
408       Out << "()";
409     }
410 
411     if (BMInitializer->isPackExpansion())
412       Out << "...";
413   }
414 }
415 
416 //----------------------------------------------------------------------------
417 // Common C declarations
418 //----------------------------------------------------------------------------
419 
420 void DeclPrinter::VisitDeclContext(DeclContext *DC, bool Indent) {
421   if (Policy.TerseOutput)
422     return;
423 
424   if (Indent)
425     Indentation += Policy.Indentation;
426 
427   SmallVector<Decl*, 2> Decls;
428   for (DeclContext::decl_iterator D = DC->decls_begin(), DEnd = DC->decls_end();
429        D != DEnd; ++D) {
430 
431     // Don't print ObjCIvarDecls, as they are printed when visiting the
432     // containing ObjCInterfaceDecl.
433     if (isa<ObjCIvarDecl>(*D))
434       continue;
435 
436     // Skip over implicit declarations in pretty-printing mode.
437     if (D->isImplicit())
438       continue;
439 
440     // Don't print implicit specializations, as they are printed when visiting
441     // corresponding templates.
442     if (auto FD = dyn_cast<FunctionDecl>(*D))
443       if (FD->getTemplateSpecializationKind() == TSK_ImplicitInstantiation &&
444           !isa<ClassTemplateSpecializationDecl>(DC))
445         continue;
446 
447     // The next bits of code handle stuff like "struct {int x;} a,b"; we're
448     // forced to merge the declarations because there's no other way to
449     // refer to the struct in question.  When that struct is named instead, we
450     // also need to merge to avoid splitting off a stand-alone struct
451     // declaration that produces the warning ext_no_declarators in some
452     // contexts.
453     //
454     // This limited merging is safe without a bunch of other checks because it
455     // only merges declarations directly referring to the tag, not typedefs.
456     //
457     // Check whether the current declaration should be grouped with a previous
458     // non-free-standing tag declaration.
459     QualType CurDeclType = getDeclType(*D);
460     if (!Decls.empty() && !CurDeclType.isNull()) {
461       QualType BaseType = GetBaseType(CurDeclType);
462       if (!BaseType.isNull() && isa<ElaboratedType>(BaseType) &&
463           cast<ElaboratedType>(BaseType)->getOwnedTagDecl() == Decls[0]) {
464         Decls.push_back(*D);
465         continue;
466       }
467     }
468 
469     // If we have a merged group waiting to be handled, handle it now.
470     if (!Decls.empty())
471       ProcessDeclGroup(Decls);
472 
473     // If the current declaration is not a free standing declaration, save it
474     // so we can merge it with the subsequent declaration(s) using it.
475     if (isa<TagDecl>(*D) && !cast<TagDecl>(*D)->isFreeStanding()) {
476       Decls.push_back(*D);
477       continue;
478     }
479 
480     if (isa<AccessSpecDecl>(*D)) {
481       Indentation -= Policy.Indentation;
482       this->Indent();
483       Print(D->getAccess());
484       Out << ":\n";
485       Indentation += Policy.Indentation;
486       continue;
487     }
488 
489     this->Indent();
490     Visit(*D);
491 
492     // FIXME: Need to be able to tell the DeclPrinter when
493     const char *Terminator = nullptr;
494     if (isa<OMPThreadPrivateDecl>(*D) || isa<OMPDeclareReductionDecl>(*D) ||
495         isa<OMPDeclareMapperDecl>(*D) || isa<OMPRequiresDecl>(*D) ||
496         isa<OMPAllocateDecl>(*D))
497       Terminator = nullptr;
498     else if (isa<ObjCMethodDecl>(*D) && cast<ObjCMethodDecl>(*D)->hasBody())
499       Terminator = nullptr;
500     else if (auto FD = dyn_cast<FunctionDecl>(*D)) {
501       if (FD->doesThisDeclarationHaveABody() && !FD->isDefaulted())
502         Terminator = nullptr;
503       else
504         Terminator = ";";
505     } else if (auto TD = dyn_cast<FunctionTemplateDecl>(*D)) {
506       if (TD->getTemplatedDecl()->doesThisDeclarationHaveABody())
507         Terminator = nullptr;
508       else
509         Terminator = ";";
510     } else if (isa<NamespaceDecl, LinkageSpecDecl, ObjCImplementationDecl,
511                    ObjCInterfaceDecl, ObjCProtocolDecl, ObjCCategoryImplDecl,
512                    ObjCCategoryDecl, HLSLBufferDecl>(*D))
513       Terminator = nullptr;
514     else if (isa<EnumConstantDecl>(*D)) {
515       DeclContext::decl_iterator Next = D;
516       ++Next;
517       if (Next != DEnd)
518         Terminator = ",";
519     } else
520       Terminator = ";";
521 
522     if (Terminator)
523       Out << Terminator;
524     if (!Policy.TerseOutput &&
525         ((isa<FunctionDecl>(*D) &&
526           cast<FunctionDecl>(*D)->doesThisDeclarationHaveABody()) ||
527          (isa<FunctionTemplateDecl>(*D) &&
528           cast<FunctionTemplateDecl>(*D)->getTemplatedDecl()->doesThisDeclarationHaveABody())))
529       ; // StmtPrinter already added '\n' after CompoundStmt.
530     else
531       Out << "\n";
532 
533     // Declare target attribute is special one, natural spelling for the pragma
534     // assumes "ending" construct so print it here.
535     if (D->hasAttr<OMPDeclareTargetDeclAttr>())
536       Out << "#pragma omp end declare target\n";
537   }
538 
539   if (!Decls.empty())
540     ProcessDeclGroup(Decls);
541 
542   if (Indent)
543     Indentation -= Policy.Indentation;
544 }
545 
546 void DeclPrinter::VisitTranslationUnitDecl(TranslationUnitDecl *D) {
547   VisitDeclContext(D, false);
548 }
549 
550 void DeclPrinter::VisitTypedefDecl(TypedefDecl *D) {
551   if (!Policy.SuppressSpecifiers) {
552     Out << "typedef ";
553 
554     if (D->isModulePrivate())
555       Out << "__module_private__ ";
556   }
557   QualType Ty = D->getTypeSourceInfo()->getType();
558   Ty.print(Out, Policy, D->getName(), Indentation);
559   prettyPrintAttributes(D);
560 }
561 
562 void DeclPrinter::VisitTypeAliasDecl(TypeAliasDecl *D) {
563   Out << "using " << *D;
564   prettyPrintAttributes(D);
565   Out << " = " << D->getTypeSourceInfo()->getType().getAsString(Policy);
566 }
567 
568 void DeclPrinter::VisitEnumDecl(EnumDecl *D) {
569   if (!Policy.SuppressSpecifiers && D->isModulePrivate())
570     Out << "__module_private__ ";
571   Out << "enum";
572   if (D->isScoped()) {
573     if (D->isScopedUsingClassTag())
574       Out << " class";
575     else
576       Out << " struct";
577   }
578 
579   prettyPrintAttributes(D);
580 
581   if (D->getDeclName())
582     Out << ' ' << D->getDeclName();
583 
584   if (D->isFixed())
585     Out << " : " << D->getIntegerType().stream(Policy);
586 
587   if (D->isCompleteDefinition()) {
588     Out << " {\n";
589     VisitDeclContext(D);
590     Indent() << "}";
591   }
592 }
593 
594 void DeclPrinter::VisitRecordDecl(RecordDecl *D) {
595   if (!Policy.SuppressSpecifiers && D->isModulePrivate())
596     Out << "__module_private__ ";
597   Out << D->getKindName();
598 
599   prettyPrintAttributes(D);
600 
601   if (D->getIdentifier())
602     Out << ' ' << *D;
603 
604   if (D->isCompleteDefinition()) {
605     Out << " {\n";
606     VisitDeclContext(D);
607     Indent() << "}";
608   }
609 }
610 
611 void DeclPrinter::VisitEnumConstantDecl(EnumConstantDecl *D) {
612   Out << *D;
613   prettyPrintAttributes(D);
614   if (Expr *Init = D->getInitExpr()) {
615     Out << " = ";
616     Init->printPretty(Out, nullptr, Policy, Indentation, "\n", &Context);
617   }
618 }
619 
620 static void printExplicitSpecifier(ExplicitSpecifier ES, llvm::raw_ostream &Out,
621                                    PrintingPolicy &Policy, unsigned Indentation,
622                                    const ASTContext &Context) {
623   std::string Proto = "explicit";
624   llvm::raw_string_ostream EOut(Proto);
625   if (ES.getExpr()) {
626     EOut << "(";
627     ES.getExpr()->printPretty(EOut, nullptr, Policy, Indentation, "\n",
628                               &Context);
629     EOut << ")";
630   }
631   EOut << " ";
632   Out << Proto;
633 }
634 
635 static void MaybePrintTagKeywordIfSupressingScopes(PrintingPolicy &Policy,
636                                                    QualType T,
637                                                    llvm::raw_ostream &Out) {
638   StringRef prefix = T->isClassType()       ? "class "
639                      : T->isStructureType() ? "struct "
640                      : T->isUnionType()     ? "union "
641                                             : "";
642   Out << prefix;
643 }
644 
645 void DeclPrinter::VisitFunctionDecl(FunctionDecl *D) {
646   if (!D->getDescribedFunctionTemplate() &&
647       !D->isFunctionTemplateSpecialization()) {
648     prettyPrintPragmas(D);
649     prettyPrintAttributes(D, AttrPosAsWritten::Left);
650   }
651 
652   if (D->isFunctionTemplateSpecialization())
653     Out << "template<> ";
654   else if (!D->getDescribedFunctionTemplate()) {
655     for (unsigned I = 0, NumTemplateParams = D->getNumTemplateParameterLists();
656          I < NumTemplateParams; ++I)
657       printTemplateParameters(D->getTemplateParameterList(I));
658   }
659 
660   CXXConstructorDecl *CDecl = dyn_cast<CXXConstructorDecl>(D);
661   CXXConversionDecl *ConversionDecl = dyn_cast<CXXConversionDecl>(D);
662   CXXDeductionGuideDecl *GuideDecl = dyn_cast<CXXDeductionGuideDecl>(D);
663   if (!Policy.SuppressSpecifiers) {
664     switch (D->getStorageClass()) {
665     case SC_None: break;
666     case SC_Extern: Out << "extern "; break;
667     case SC_Static: Out << "static "; break;
668     case SC_PrivateExtern: Out << "__private_extern__ "; break;
669     case SC_Auto: case SC_Register:
670       llvm_unreachable("invalid for functions");
671     }
672 
673     if (D->isInlineSpecified())  Out << "inline ";
674     if (D->isVirtualAsWritten()) Out << "virtual ";
675     if (D->isModulePrivate())    Out << "__module_private__ ";
676     if (D->isConstexprSpecified() && !D->isExplicitlyDefaulted())
677       Out << "constexpr ";
678     if (D->isConsteval())        Out << "consteval ";
679     else if (D->isImmediateFunction())
680       Out << "immediate ";
681     ExplicitSpecifier ExplicitSpec = ExplicitSpecifier::getFromDecl(D);
682     if (ExplicitSpec.isSpecified())
683       printExplicitSpecifier(ExplicitSpec, Out, Policy, Indentation, Context);
684   }
685 
686   PrintingPolicy SubPolicy(Policy);
687   SubPolicy.SuppressSpecifiers = false;
688   std::string Proto;
689 
690   if (Policy.FullyQualifiedName) {
691     Proto += D->getQualifiedNameAsString();
692   } else {
693     llvm::raw_string_ostream OS(Proto);
694     if (!Policy.SuppressScope) {
695       if (const NestedNameSpecifier *NS = D->getQualifier()) {
696         NS->print(OS, Policy);
697       }
698     }
699     D->getNameInfo().printName(OS, Policy);
700   }
701 
702   if (GuideDecl)
703     Proto = GuideDecl->getDeducedTemplate()->getDeclName().getAsString();
704   if (D->isFunctionTemplateSpecialization()) {
705     llvm::raw_string_ostream POut(Proto);
706     DeclPrinter TArgPrinter(POut, SubPolicy, Context, Indentation);
707     const auto *TArgAsWritten = D->getTemplateSpecializationArgsAsWritten();
708     if (TArgAsWritten && !Policy.PrintCanonicalTypes)
709       TArgPrinter.printTemplateArguments(TArgAsWritten->arguments(), nullptr);
710     else if (const TemplateArgumentList *TArgs =
711                  D->getTemplateSpecializationArgs())
712       TArgPrinter.printTemplateArguments(TArgs->asArray(), nullptr);
713   }
714 
715   QualType Ty = D->getType();
716   while (const ParenType *PT = dyn_cast<ParenType>(Ty)) {
717     Proto = '(' + Proto + ')';
718     Ty = PT->getInnerType();
719   }
720 
721   if (const FunctionType *AFT = Ty->getAs<FunctionType>()) {
722     const FunctionProtoType *FT = nullptr;
723     if (D->hasWrittenPrototype())
724       FT = dyn_cast<FunctionProtoType>(AFT);
725 
726     Proto += "(";
727     if (FT) {
728       llvm::raw_string_ostream POut(Proto);
729       DeclPrinter ParamPrinter(POut, SubPolicy, Context, Indentation);
730       for (unsigned i = 0, e = D->getNumParams(); i != e; ++i) {
731         if (i) POut << ", ";
732         ParamPrinter.VisitParmVarDecl(D->getParamDecl(i));
733       }
734 
735       if (FT->isVariadic()) {
736         if (D->getNumParams()) POut << ", ";
737         POut << "...";
738       } else if (!D->getNumParams() && !Context.getLangOpts().CPlusPlus) {
739         // The function has a prototype, so it needs to retain the prototype
740         // in C.
741         POut << "void";
742       }
743     } else if (D->doesThisDeclarationHaveABody() && !D->hasPrototype()) {
744       for (unsigned i = 0, e = D->getNumParams(); i != e; ++i) {
745         if (i)
746           Proto += ", ";
747         Proto += D->getParamDecl(i)->getNameAsString();
748       }
749     }
750 
751     Proto += ")";
752 
753     if (FT) {
754       if (FT->isConst())
755         Proto += " const";
756       if (FT->isVolatile())
757         Proto += " volatile";
758       if (FT->isRestrict())
759         Proto += " restrict";
760 
761       switch (FT->getRefQualifier()) {
762       case RQ_None:
763         break;
764       case RQ_LValue:
765         Proto += " &";
766         break;
767       case RQ_RValue:
768         Proto += " &&";
769         break;
770       }
771     }
772 
773     if (FT && FT->hasDynamicExceptionSpec()) {
774       Proto += " throw(";
775       if (FT->getExceptionSpecType() == EST_MSAny)
776         Proto += "...";
777       else
778         for (unsigned I = 0, N = FT->getNumExceptions(); I != N; ++I) {
779           if (I)
780             Proto += ", ";
781 
782           Proto += FT->getExceptionType(I).getAsString(SubPolicy);
783         }
784       Proto += ")";
785     } else if (FT && isNoexceptExceptionSpec(FT->getExceptionSpecType())) {
786       Proto += " noexcept";
787       if (isComputedNoexcept(FT->getExceptionSpecType())) {
788         Proto += "(";
789         llvm::raw_string_ostream EOut(Proto);
790         FT->getNoexceptExpr()->printPretty(EOut, nullptr, SubPolicy,
791                                            Indentation, "\n", &Context);
792         Proto += ")";
793       }
794     }
795 
796     if (CDecl) {
797       if (!Policy.TerseOutput)
798         PrintConstructorInitializers(CDecl, Proto);
799     } else if (!ConversionDecl && !isa<CXXDestructorDecl>(D)) {
800       if (FT && FT->hasTrailingReturn()) {
801         if (!GuideDecl)
802           Out << "auto ";
803         Out << Proto << " -> ";
804         Proto.clear();
805       }
806       if (!Policy.SuppressTagKeyword && Policy.SuppressScope &&
807           !Policy.SuppressUnwrittenScope)
808         MaybePrintTagKeywordIfSupressingScopes(Policy, AFT->getReturnType(),
809                                                Out);
810       AFT->getReturnType().print(Out, Policy, Proto);
811       Proto.clear();
812     }
813     Out << Proto;
814 
815     if (Expr *TrailingRequiresClause = D->getTrailingRequiresClause()) {
816       Out << " requires ";
817       TrailingRequiresClause->printPretty(Out, nullptr, SubPolicy, Indentation,
818                                           "\n", &Context);
819     }
820   } else {
821     Ty.print(Out, Policy, Proto);
822   }
823 
824   prettyPrintAttributes(D, AttrPosAsWritten::Right);
825 
826   if (D->isPureVirtual())
827     Out << " = 0";
828   else if (D->isDeletedAsWritten()) {
829     Out << " = delete";
830     if (const StringLiteral *M = D->getDeletedMessage()) {
831       Out << "(";
832       M->outputString(Out);
833       Out << ")";
834     }
835   } else if (D->isExplicitlyDefaulted())
836     Out << " = default";
837   else if (D->doesThisDeclarationHaveABody()) {
838     if (!Policy.TerseOutput) {
839       if (!D->hasPrototype() && D->getNumParams()) {
840         // This is a K&R function definition, so we need to print the
841         // parameters.
842         Out << '\n';
843         DeclPrinter ParamPrinter(Out, SubPolicy, Context, Indentation);
844         Indentation += Policy.Indentation;
845         for (unsigned i = 0, e = D->getNumParams(); i != e; ++i) {
846           Indent();
847           ParamPrinter.VisitParmVarDecl(D->getParamDecl(i));
848           Out << ";\n";
849         }
850         Indentation -= Policy.Indentation;
851       }
852 
853       if (D->getBody())
854         D->getBody()->printPrettyControlled(Out, nullptr, SubPolicy, Indentation, "\n",
855                                   &Context);
856     } else {
857       if (!Policy.TerseOutput && isa<CXXConstructorDecl>(*D))
858         Out << " {}";
859     }
860   }
861 }
862 
863 void DeclPrinter::VisitFriendDecl(FriendDecl *D) {
864   if (TypeSourceInfo *TSI = D->getFriendType()) {
865     unsigned NumTPLists = D->getFriendTypeNumTemplateParameterLists();
866     for (unsigned i = 0; i < NumTPLists; ++i)
867       printTemplateParameters(D->getFriendTypeTemplateParameterList(i));
868     Out << "friend ";
869     Out << TSI->getType().getAsString(Policy);
870   }
871   else if (FunctionDecl *FD =
872       dyn_cast<FunctionDecl>(D->getFriendDecl())) {
873     Out << "friend ";
874     VisitFunctionDecl(FD);
875   }
876   else if (FunctionTemplateDecl *FTD =
877            dyn_cast<FunctionTemplateDecl>(D->getFriendDecl())) {
878     Out << "friend ";
879     VisitFunctionTemplateDecl(FTD);
880   }
881   else if (ClassTemplateDecl *CTD =
882            dyn_cast<ClassTemplateDecl>(D->getFriendDecl())) {
883     Out << "friend ";
884     VisitRedeclarableTemplateDecl(CTD);
885   }
886 
887   if (D->isPackExpansion())
888     Out << "...";
889 }
890 
891 void DeclPrinter::VisitFieldDecl(FieldDecl *D) {
892   // FIXME: add printing of pragma attributes if required.
893   if (!Policy.SuppressSpecifiers && D->isMutable())
894     Out << "mutable ";
895   if (!Policy.SuppressSpecifiers && D->isModulePrivate())
896     Out << "__module_private__ ";
897 
898   Out << D->getASTContext().getUnqualifiedObjCPointerType(D->getType()).
899          stream(Policy, D->getName(), Indentation);
900 
901   if (D->isBitField()) {
902     Out << " : ";
903     D->getBitWidth()->printPretty(Out, nullptr, Policy, Indentation, "\n",
904                                   &Context);
905   }
906 
907   Expr *Init = D->getInClassInitializer();
908   if (!Policy.SuppressInitializers && Init) {
909     if (D->getInClassInitStyle() == ICIS_ListInit)
910       Out << " ";
911     else
912       Out << " = ";
913     Init->printPretty(Out, nullptr, Policy, Indentation, "\n", &Context);
914   }
915   prettyPrintAttributes(D);
916 }
917 
918 void DeclPrinter::VisitLabelDecl(LabelDecl *D) {
919   Out << *D << ":";
920 }
921 
922 void DeclPrinter::VisitVarDecl(VarDecl *D) {
923   prettyPrintPragmas(D);
924 
925   prettyPrintAttributes(D, AttrPosAsWritten::Left);
926 
927   if (const auto *Param = dyn_cast<ParmVarDecl>(D);
928       Param && Param->isExplicitObjectParameter())
929     Out << "this ";
930 
931   QualType T = D->getTypeSourceInfo()
932     ? D->getTypeSourceInfo()->getType()
933     : D->getASTContext().getUnqualifiedObjCPointerType(D->getType());
934 
935   if (!Policy.SuppressSpecifiers) {
936     StorageClass SC = D->getStorageClass();
937     if (SC != SC_None)
938       Out << VarDecl::getStorageClassSpecifierString(SC) << " ";
939 
940     switch (D->getTSCSpec()) {
941     case TSCS_unspecified:
942       break;
943     case TSCS___thread:
944       Out << "__thread ";
945       break;
946     case TSCS__Thread_local:
947       Out << "_Thread_local ";
948       break;
949     case TSCS_thread_local:
950       Out << "thread_local ";
951       break;
952     }
953 
954     if (D->isModulePrivate())
955       Out << "__module_private__ ";
956 
957     if (D->isConstexpr()) {
958       Out << "constexpr ";
959       T.removeLocalConst();
960     }
961   }
962 
963   if (!Policy.SuppressTagKeyword && Policy.SuppressScope &&
964       !Policy.SuppressUnwrittenScope)
965     MaybePrintTagKeywordIfSupressingScopes(Policy, T, Out);
966 
967   printDeclType(T, (isa<ParmVarDecl>(D) && Policy.CleanUglifiedParameters &&
968                     D->getIdentifier())
969                        ? D->getIdentifier()->deuglifiedName()
970                        : D->getName());
971 
972   prettyPrintAttributes(D, AttrPosAsWritten::Right);
973 
974   Expr *Init = D->getInit();
975   if (!Policy.SuppressInitializers && Init) {
976     bool ImplicitInit = false;
977     if (D->isCXXForRangeDecl()) {
978       // FIXME: We should print the range expression instead.
979       ImplicitInit = true;
980     } else if (CXXConstructExpr *Construct =
981                    dyn_cast<CXXConstructExpr>(Init->IgnoreImplicit())) {
982       if (D->getInitStyle() == VarDecl::CallInit &&
983           !Construct->isListInitialization()) {
984         ImplicitInit = Construct->getNumArgs() == 0 ||
985                        Construct->getArg(0)->isDefaultArgument();
986       }
987     }
988     if (!ImplicitInit) {
989       if ((D->getInitStyle() == VarDecl::CallInit) && !isa<ParenListExpr>(Init))
990         Out << "(";
991       else if (D->getInitStyle() == VarDecl::CInit) {
992         Out << " = ";
993       }
994       PrintingPolicy SubPolicy(Policy);
995       SubPolicy.SuppressSpecifiers = false;
996       SubPolicy.IncludeTagDefinition = false;
997       Init->printPretty(Out, nullptr, SubPolicy, Indentation, "\n", &Context);
998       if ((D->getInitStyle() == VarDecl::CallInit) && !isa<ParenListExpr>(Init))
999         Out << ")";
1000     }
1001   }
1002 }
1003 
1004 void DeclPrinter::VisitParmVarDecl(ParmVarDecl *D) {
1005   VisitVarDecl(D);
1006 }
1007 
1008 void DeclPrinter::VisitFileScopeAsmDecl(FileScopeAsmDecl *D) {
1009   Out << "__asm (";
1010   D->getAsmString()->printPretty(Out, nullptr, Policy, Indentation, "\n",
1011                                  &Context);
1012   Out << ")";
1013 }
1014 
1015 void DeclPrinter::VisitTopLevelStmtDecl(TopLevelStmtDecl *D) {
1016   assert(D->getStmt());
1017   D->getStmt()->printPretty(Out, nullptr, Policy, Indentation, "\n", &Context);
1018 }
1019 
1020 void DeclPrinter::VisitImportDecl(ImportDecl *D) {
1021   Out << "@import " << D->getImportedModule()->getFullModuleName()
1022       << ";\n";
1023 }
1024 
1025 void DeclPrinter::VisitStaticAssertDecl(StaticAssertDecl *D) {
1026   Out << "static_assert(";
1027   D->getAssertExpr()->printPretty(Out, nullptr, Policy, Indentation, "\n",
1028                                   &Context);
1029   if (Expr *E = D->getMessage()) {
1030     Out << ", ";
1031     E->printPretty(Out, nullptr, Policy, Indentation, "\n", &Context);
1032   }
1033   Out << ")";
1034 }
1035 
1036 //----------------------------------------------------------------------------
1037 // C++ declarations
1038 //----------------------------------------------------------------------------
1039 void DeclPrinter::VisitNamespaceDecl(NamespaceDecl *D) {
1040   if (D->isInline())
1041     Out << "inline ";
1042 
1043   Out << "namespace ";
1044   if (D->getDeclName())
1045     Out << D->getDeclName() << ' ';
1046   Out << "{\n";
1047 
1048   VisitDeclContext(D);
1049   Indent() << "}";
1050 }
1051 
1052 void DeclPrinter::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
1053   Out << "using namespace ";
1054   if (D->getQualifier())
1055     D->getQualifier()->print(Out, Policy);
1056   Out << *D->getNominatedNamespaceAsWritten();
1057 }
1058 
1059 void DeclPrinter::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
1060   Out << "namespace " << *D << " = ";
1061   if (D->getQualifier())
1062     D->getQualifier()->print(Out, Policy);
1063   Out << *D->getAliasedNamespace();
1064 }
1065 
1066 void DeclPrinter::VisitEmptyDecl(EmptyDecl *D) {
1067   prettyPrintAttributes(D);
1068 }
1069 
1070 void DeclPrinter::VisitCXXRecordDecl(CXXRecordDecl *D) {
1071   // FIXME: add printing of pragma attributes if required.
1072   if (!Policy.SuppressSpecifiers && D->isModulePrivate())
1073     Out << "__module_private__ ";
1074 
1075   Out << D->getKindName() << ' ';
1076 
1077   // FIXME: Move before printing the decl kind to match the behavior of the
1078   // attribute printing for variables and function where they are printed first.
1079   if (prettyPrintAttributes(D, AttrPosAsWritten::Left))
1080     Out << ' ';
1081 
1082   if (D->getIdentifier()) {
1083     if (auto *NNS = D->getQualifier())
1084       NNS->print(Out, Policy);
1085     Out << *D;
1086 
1087     if (auto *S = dyn_cast<ClassTemplateSpecializationDecl>(D)) {
1088       const TemplateParameterList *TParams =
1089           S->getSpecializedTemplate()->getTemplateParameters();
1090       const ASTTemplateArgumentListInfo *TArgAsWritten =
1091           S->getTemplateArgsAsWritten();
1092       if (TArgAsWritten && !Policy.PrintCanonicalTypes)
1093         printTemplateArguments(TArgAsWritten->arguments(), TParams);
1094       else
1095         printTemplateArguments(S->getTemplateArgs().asArray(), TParams);
1096     }
1097   }
1098 
1099   prettyPrintAttributes(D, AttrPosAsWritten::Right);
1100 
1101   if (D->isCompleteDefinition()) {
1102     Out << ' ';
1103     // Print the base classes
1104     if (D->getNumBases()) {
1105       Out << ": ";
1106       for (CXXRecordDecl::base_class_iterator Base = D->bases_begin(),
1107              BaseEnd = D->bases_end(); Base != BaseEnd; ++Base) {
1108         if (Base != D->bases_begin())
1109           Out << ", ";
1110 
1111         if (Base->isVirtual())
1112           Out << "virtual ";
1113 
1114         AccessSpecifier AS = Base->getAccessSpecifierAsWritten();
1115         if (AS != AS_none) {
1116           Print(AS);
1117           Out << " ";
1118         }
1119         Out << Base->getType().getAsString(Policy);
1120 
1121         if (Base->isPackExpansion())
1122           Out << "...";
1123       }
1124       Out << ' ';
1125     }
1126 
1127     // Print the class definition
1128     // FIXME: Doesn't print access specifiers, e.g., "public:"
1129     if (Policy.TerseOutput) {
1130       Out << "{}";
1131     } else {
1132       Out << "{\n";
1133       VisitDeclContext(D);
1134       Indent() << "}";
1135     }
1136   }
1137 }
1138 
1139 void DeclPrinter::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
1140   const char *l;
1141   if (D->getLanguage() == LinkageSpecLanguageIDs::C)
1142     l = "C";
1143   else {
1144     assert(D->getLanguage() == LinkageSpecLanguageIDs::CXX &&
1145            "unknown language in linkage specification");
1146     l = "C++";
1147   }
1148 
1149   Out << "extern \"" << l << "\" ";
1150   if (D->hasBraces()) {
1151     Out << "{\n";
1152     VisitDeclContext(D);
1153     Indent() << "}";
1154   } else
1155     Visit(*D->decls_begin());
1156 }
1157 
1158 void DeclPrinter::printTemplateParameters(const TemplateParameterList *Params,
1159                                           bool OmitTemplateKW) {
1160   assert(Params);
1161 
1162   // Don't print invented template parameter lists.
1163   if (!Params->empty() && Params->getParam(0)->isImplicit())
1164     return;
1165 
1166   if (!OmitTemplateKW)
1167     Out << "template ";
1168   Out << '<';
1169 
1170   bool NeedComma = false;
1171   for (const Decl *Param : *Params) {
1172     if (Param->isImplicit())
1173       continue;
1174 
1175     if (NeedComma)
1176       Out << ", ";
1177     else
1178       NeedComma = true;
1179 
1180     if (const auto *TTP = dyn_cast<TemplateTypeParmDecl>(Param)) {
1181       VisitTemplateTypeParmDecl(TTP);
1182     } else if (auto NTTP = dyn_cast<NonTypeTemplateParmDecl>(Param)) {
1183       VisitNonTypeTemplateParmDecl(NTTP);
1184     } else if (auto TTPD = dyn_cast<TemplateTemplateParmDecl>(Param)) {
1185       VisitTemplateDecl(TTPD);
1186       // FIXME: print the default argument, if present.
1187     }
1188   }
1189 
1190   Out << '>';
1191 
1192   if (const Expr *RequiresClause = Params->getRequiresClause()) {
1193     Out << " requires ";
1194     RequiresClause->printPretty(Out, nullptr, Policy, Indentation, "\n",
1195                                 &Context);
1196   }
1197 
1198   if (!OmitTemplateKW)
1199     Out << ' ';
1200 }
1201 
1202 void DeclPrinter::printTemplateArguments(ArrayRef<TemplateArgument> Args,
1203                                          const TemplateParameterList *Params) {
1204   Out << "<";
1205   for (size_t I = 0, E = Args.size(); I < E; ++I) {
1206     if (I)
1207       Out << ", ";
1208     if (!Params)
1209       Args[I].print(Policy, Out, /*IncludeType*/ true);
1210     else
1211       Args[I].print(Policy, Out,
1212                     TemplateParameterList::shouldIncludeTypeForArgument(
1213                         Policy, Params, I));
1214   }
1215   Out << ">";
1216 }
1217 
1218 void DeclPrinter::printTemplateArguments(ArrayRef<TemplateArgumentLoc> Args,
1219                                          const TemplateParameterList *Params) {
1220   Out << "<";
1221   for (size_t I = 0, E = Args.size(); I < E; ++I) {
1222     if (I)
1223       Out << ", ";
1224     if (!Params)
1225       Args[I].getArgument().print(Policy, Out, /*IncludeType*/ true);
1226     else
1227       Args[I].getArgument().print(
1228           Policy, Out,
1229           TemplateParameterList::shouldIncludeTypeForArgument(Policy, Params,
1230                                                               I));
1231   }
1232   Out << ">";
1233 }
1234 
1235 void DeclPrinter::VisitTemplateDecl(const TemplateDecl *D) {
1236   printTemplateParameters(D->getTemplateParameters());
1237 
1238   if (const TemplateTemplateParmDecl *TTP =
1239         dyn_cast<TemplateTemplateParmDecl>(D)) {
1240     if (TTP->wasDeclaredWithTypename())
1241       Out << "typename";
1242     else
1243       Out << "class";
1244 
1245     if (TTP->isParameterPack())
1246       Out << " ...";
1247     else if (TTP->getDeclName())
1248       Out << ' ';
1249 
1250     if (TTP->getDeclName()) {
1251       if (Policy.CleanUglifiedParameters && TTP->getIdentifier())
1252         Out << TTP->getIdentifier()->deuglifiedName();
1253       else
1254         Out << TTP->getDeclName();
1255     }
1256   } else if (auto *TD = D->getTemplatedDecl())
1257     Visit(TD);
1258   else if (const auto *Concept = dyn_cast<ConceptDecl>(D)) {
1259     Out << "concept " << Concept->getName() << " = " ;
1260     Concept->getConstraintExpr()->printPretty(Out, nullptr, Policy, Indentation,
1261                                               "\n", &Context);
1262   }
1263 }
1264 
1265 void DeclPrinter::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
1266   prettyPrintPragmas(D->getTemplatedDecl());
1267   // Print any leading template parameter lists.
1268   if (const FunctionDecl *FD = D->getTemplatedDecl()) {
1269     for (unsigned I = 0, NumTemplateParams = FD->getNumTemplateParameterLists();
1270          I < NumTemplateParams; ++I)
1271       printTemplateParameters(FD->getTemplateParameterList(I));
1272   }
1273   VisitRedeclarableTemplateDecl(D);
1274   // Declare target attribute is special one, natural spelling for the pragma
1275   // assumes "ending" construct so print it here.
1276   if (D->getTemplatedDecl()->hasAttr<OMPDeclareTargetDeclAttr>())
1277     Out << "#pragma omp end declare target\n";
1278 
1279   // Never print "instantiations" for deduction guides (they don't really
1280   // have them).
1281   if (PrintInstantiation &&
1282       !isa<CXXDeductionGuideDecl>(D->getTemplatedDecl())) {
1283     FunctionDecl *PrevDecl = D->getTemplatedDecl();
1284     const FunctionDecl *Def;
1285     if (PrevDecl->isDefined(Def) && Def != PrevDecl)
1286       return;
1287     for (auto *I : D->specializations())
1288       if (I->getTemplateSpecializationKind() == TSK_ImplicitInstantiation) {
1289         if (!PrevDecl->isThisDeclarationADefinition())
1290           Out << ";\n";
1291         Indent();
1292         prettyPrintPragmas(I);
1293         Visit(I);
1294       }
1295   }
1296 }
1297 
1298 void DeclPrinter::VisitClassTemplateDecl(ClassTemplateDecl *D) {
1299   VisitRedeclarableTemplateDecl(D);
1300 
1301   if (PrintInstantiation) {
1302     for (auto *I : D->specializations())
1303       if (I->getSpecializationKind() == TSK_ImplicitInstantiation) {
1304         if (D->isThisDeclarationADefinition())
1305           Out << ";";
1306         Out << "\n";
1307         Indent();
1308         Visit(I);
1309       }
1310   }
1311 }
1312 
1313 void DeclPrinter::VisitClassTemplateSpecializationDecl(
1314                                            ClassTemplateSpecializationDecl *D) {
1315   Out << "template<> ";
1316   VisitCXXRecordDecl(D);
1317 }
1318 
1319 void DeclPrinter::VisitClassTemplatePartialSpecializationDecl(
1320                                     ClassTemplatePartialSpecializationDecl *D) {
1321   printTemplateParameters(D->getTemplateParameters());
1322   VisitCXXRecordDecl(D);
1323 }
1324 
1325 //----------------------------------------------------------------------------
1326 // Objective-C declarations
1327 //----------------------------------------------------------------------------
1328 
1329 void DeclPrinter::PrintObjCMethodType(ASTContext &Ctx,
1330                                       Decl::ObjCDeclQualifier Quals,
1331                                       QualType T) {
1332   Out << '(';
1333   if (Quals & Decl::ObjCDeclQualifier::OBJC_TQ_In)
1334     Out << "in ";
1335   if (Quals & Decl::ObjCDeclQualifier::OBJC_TQ_Inout)
1336     Out << "inout ";
1337   if (Quals & Decl::ObjCDeclQualifier::OBJC_TQ_Out)
1338     Out << "out ";
1339   if (Quals & Decl::ObjCDeclQualifier::OBJC_TQ_Bycopy)
1340     Out << "bycopy ";
1341   if (Quals & Decl::ObjCDeclQualifier::OBJC_TQ_Byref)
1342     Out << "byref ";
1343   if (Quals & Decl::ObjCDeclQualifier::OBJC_TQ_Oneway)
1344     Out << "oneway ";
1345   if (Quals & Decl::ObjCDeclQualifier::OBJC_TQ_CSNullability) {
1346     if (auto nullability = AttributedType::stripOuterNullability(T))
1347       Out << getNullabilitySpelling(*nullability, true) << ' ';
1348   }
1349 
1350   Out << Ctx.getUnqualifiedObjCPointerType(T).getAsString(Policy);
1351   Out << ')';
1352 }
1353 
1354 void DeclPrinter::PrintObjCTypeParams(ObjCTypeParamList *Params) {
1355   Out << "<";
1356   unsigned First = true;
1357   for (auto *Param : *Params) {
1358     if (First) {
1359       First = false;
1360     } else {
1361       Out << ", ";
1362     }
1363 
1364     switch (Param->getVariance()) {
1365     case ObjCTypeParamVariance::Invariant:
1366       break;
1367 
1368     case ObjCTypeParamVariance::Covariant:
1369       Out << "__covariant ";
1370       break;
1371 
1372     case ObjCTypeParamVariance::Contravariant:
1373       Out << "__contravariant ";
1374       break;
1375     }
1376 
1377     Out << Param->getDeclName();
1378 
1379     if (Param->hasExplicitBound()) {
1380       Out << " : " << Param->getUnderlyingType().getAsString(Policy);
1381     }
1382   }
1383   Out << ">";
1384 }
1385 
1386 void DeclPrinter::VisitObjCMethodDecl(ObjCMethodDecl *OMD) {
1387   if (OMD->isInstanceMethod())
1388     Out << "- ";
1389   else
1390     Out << "+ ";
1391   if (!OMD->getReturnType().isNull()) {
1392     PrintObjCMethodType(OMD->getASTContext(), OMD->getObjCDeclQualifier(),
1393                         OMD->getReturnType());
1394   }
1395 
1396   std::string name = OMD->getSelector().getAsString();
1397   std::string::size_type pos, lastPos = 0;
1398   for (const auto *PI : OMD->parameters()) {
1399     // FIXME: selector is missing here!
1400     pos = name.find_first_of(':', lastPos);
1401     if (lastPos != 0)
1402       Out << " ";
1403     Out << name.substr(lastPos, pos - lastPos) << ':';
1404     PrintObjCMethodType(OMD->getASTContext(),
1405                         PI->getObjCDeclQualifier(),
1406                         PI->getType());
1407     Out << *PI;
1408     lastPos = pos + 1;
1409   }
1410 
1411   if (OMD->param_begin() == OMD->param_end())
1412     Out << name;
1413 
1414   if (OMD->isVariadic())
1415       Out << ", ...";
1416 
1417   prettyPrintAttributes(OMD);
1418 
1419   if (OMD->getBody() && !Policy.TerseOutput) {
1420     Out << ' ';
1421     OMD->getBody()->printPretty(Out, nullptr, Policy, Indentation, "\n",
1422                                 &Context);
1423   }
1424   else if (Policy.PolishForDeclaration)
1425     Out << ';';
1426 }
1427 
1428 void DeclPrinter::VisitObjCImplementationDecl(ObjCImplementationDecl *OID) {
1429   std::string I = OID->getNameAsString();
1430   ObjCInterfaceDecl *SID = OID->getSuperClass();
1431 
1432   bool eolnOut = false;
1433   if (SID)
1434     Out << "@implementation " << I << " : " << *SID;
1435   else
1436     Out << "@implementation " << I;
1437 
1438   if (OID->ivar_size() > 0) {
1439     Out << "{\n";
1440     eolnOut = true;
1441     Indentation += Policy.Indentation;
1442     for (const auto *I : OID->ivars()) {
1443       Indent() << I->getASTContext().getUnqualifiedObjCPointerType(I->getType()).
1444                     getAsString(Policy) << ' ' << *I << ";\n";
1445     }
1446     Indentation -= Policy.Indentation;
1447     Out << "}\n";
1448   }
1449   else if (SID || (OID->decls_begin() != OID->decls_end())) {
1450     Out << "\n";
1451     eolnOut = true;
1452   }
1453   VisitDeclContext(OID, false);
1454   if (!eolnOut)
1455     Out << "\n";
1456   Out << "@end";
1457 }
1458 
1459 void DeclPrinter::VisitObjCInterfaceDecl(ObjCInterfaceDecl *OID) {
1460   std::string I = OID->getNameAsString();
1461   ObjCInterfaceDecl *SID = OID->getSuperClass();
1462 
1463   if (!OID->isThisDeclarationADefinition()) {
1464     Out << "@class " << I;
1465 
1466     if (auto TypeParams = OID->getTypeParamListAsWritten()) {
1467       PrintObjCTypeParams(TypeParams);
1468     }
1469 
1470     Out << ";";
1471     return;
1472   }
1473   bool eolnOut = false;
1474   if (OID->hasAttrs()) {
1475     prettyPrintAttributes(OID);
1476     Out << "\n";
1477   }
1478 
1479   Out << "@interface " << I;
1480 
1481   if (auto TypeParams = OID->getTypeParamListAsWritten()) {
1482     PrintObjCTypeParams(TypeParams);
1483   }
1484 
1485   if (SID)
1486     Out << " : " << QualType(OID->getSuperClassType(), 0).getAsString(Policy);
1487 
1488   // Protocols?
1489   const ObjCList<ObjCProtocolDecl> &Protocols = OID->getReferencedProtocols();
1490   if (!Protocols.empty()) {
1491     for (ObjCList<ObjCProtocolDecl>::iterator I = Protocols.begin(),
1492          E = Protocols.end(); I != E; ++I)
1493       Out << (I == Protocols.begin() ? '<' : ',') << **I;
1494     Out << "> ";
1495   }
1496 
1497   if (OID->ivar_size() > 0) {
1498     Out << "{\n";
1499     eolnOut = true;
1500     Indentation += Policy.Indentation;
1501     for (const auto *I : OID->ivars()) {
1502       Indent() << I->getASTContext()
1503                       .getUnqualifiedObjCPointerType(I->getType())
1504                       .getAsString(Policy) << ' ' << *I << ";\n";
1505     }
1506     Indentation -= Policy.Indentation;
1507     Out << "}\n";
1508   }
1509   else if (SID || (OID->decls_begin() != OID->decls_end())) {
1510     Out << "\n";
1511     eolnOut = true;
1512   }
1513 
1514   VisitDeclContext(OID, false);
1515   if (!eolnOut)
1516     Out << "\n";
1517   Out << "@end";
1518   // FIXME: implement the rest...
1519 }
1520 
1521 void DeclPrinter::VisitObjCProtocolDecl(ObjCProtocolDecl *PID) {
1522   if (!PID->isThisDeclarationADefinition()) {
1523     Out << "@protocol " << *PID << ";\n";
1524     return;
1525   }
1526   // Protocols?
1527   const ObjCList<ObjCProtocolDecl> &Protocols = PID->getReferencedProtocols();
1528   if (!Protocols.empty()) {
1529     Out << "@protocol " << *PID;
1530     for (ObjCList<ObjCProtocolDecl>::iterator I = Protocols.begin(),
1531          E = Protocols.end(); I != E; ++I)
1532       Out << (I == Protocols.begin() ? '<' : ',') << **I;
1533     Out << ">\n";
1534   } else
1535     Out << "@protocol " << *PID << '\n';
1536   VisitDeclContext(PID, false);
1537   Out << "@end";
1538 }
1539 
1540 void DeclPrinter::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *PID) {
1541   Out << "@implementation ";
1542   if (const auto *CID = PID->getClassInterface())
1543     Out << *CID;
1544   else
1545     Out << "<<error-type>>";
1546   Out << '(' << *PID << ")\n";
1547 
1548   VisitDeclContext(PID, false);
1549   Out << "@end";
1550   // FIXME: implement the rest...
1551 }
1552 
1553 void DeclPrinter::VisitObjCCategoryDecl(ObjCCategoryDecl *PID) {
1554   Out << "@interface ";
1555   if (const auto *CID = PID->getClassInterface())
1556     Out << *CID;
1557   else
1558     Out << "<<error-type>>";
1559   if (auto TypeParams = PID->getTypeParamList()) {
1560     PrintObjCTypeParams(TypeParams);
1561   }
1562   Out << "(" << *PID << ")\n";
1563   if (PID->ivar_size() > 0) {
1564     Out << "{\n";
1565     Indentation += Policy.Indentation;
1566     for (const auto *I : PID->ivars())
1567       Indent() << I->getASTContext().getUnqualifiedObjCPointerType(I->getType()).
1568                     getAsString(Policy) << ' ' << *I << ";\n";
1569     Indentation -= Policy.Indentation;
1570     Out << "}\n";
1571   }
1572 
1573   VisitDeclContext(PID, false);
1574   Out << "@end";
1575 
1576   // FIXME: implement the rest...
1577 }
1578 
1579 void DeclPrinter::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *AID) {
1580   Out << "@compatibility_alias " << *AID
1581       << ' ' << *AID->getClassInterface() << ";\n";
1582 }
1583 
1584 /// PrintObjCPropertyDecl - print a property declaration.
1585 ///
1586 /// Print attributes in the following order:
1587 /// - class
1588 /// - nonatomic | atomic
1589 /// - assign | retain | strong | copy | weak | unsafe_unretained
1590 /// - readwrite | readonly
1591 /// - getter & setter
1592 /// - nullability
1593 void DeclPrinter::VisitObjCPropertyDecl(ObjCPropertyDecl *PDecl) {
1594   if (PDecl->getPropertyImplementation() == ObjCPropertyDecl::Required)
1595     Out << "@required\n";
1596   else if (PDecl->getPropertyImplementation() == ObjCPropertyDecl::Optional)
1597     Out << "@optional\n";
1598 
1599   QualType T = PDecl->getType();
1600 
1601   Out << "@property";
1602   if (PDecl->getPropertyAttributes() != ObjCPropertyAttribute::kind_noattr) {
1603     bool first = true;
1604     Out << "(";
1605     if (PDecl->getPropertyAttributes() & ObjCPropertyAttribute::kind_class) {
1606       Out << (first ? "" : ", ") << "class";
1607       first = false;
1608     }
1609 
1610     if (PDecl->getPropertyAttributes() & ObjCPropertyAttribute::kind_direct) {
1611       Out << (first ? "" : ", ") << "direct";
1612       first = false;
1613     }
1614 
1615     if (PDecl->getPropertyAttributes() &
1616         ObjCPropertyAttribute::kind_nonatomic) {
1617       Out << (first ? "" : ", ") << "nonatomic";
1618       first = false;
1619     }
1620     if (PDecl->getPropertyAttributes() & ObjCPropertyAttribute::kind_atomic) {
1621       Out << (first ? "" : ", ") << "atomic";
1622       first = false;
1623     }
1624 
1625     if (PDecl->getPropertyAttributes() & ObjCPropertyAttribute::kind_assign) {
1626       Out << (first ? "" : ", ") << "assign";
1627       first = false;
1628     }
1629     if (PDecl->getPropertyAttributes() & ObjCPropertyAttribute::kind_retain) {
1630       Out << (first ? "" : ", ") << "retain";
1631       first = false;
1632     }
1633 
1634     if (PDecl->getPropertyAttributes() & ObjCPropertyAttribute::kind_strong) {
1635       Out << (first ? "" : ", ") << "strong";
1636       first = false;
1637     }
1638     if (PDecl->getPropertyAttributes() & ObjCPropertyAttribute::kind_copy) {
1639       Out << (first ? "" : ", ") << "copy";
1640       first = false;
1641     }
1642     if (PDecl->getPropertyAttributes() & ObjCPropertyAttribute::kind_weak) {
1643       Out << (first ? "" : ", ") << "weak";
1644       first = false;
1645     }
1646     if (PDecl->getPropertyAttributes() &
1647         ObjCPropertyAttribute::kind_unsafe_unretained) {
1648       Out << (first ? "" : ", ") << "unsafe_unretained";
1649       first = false;
1650     }
1651 
1652     if (PDecl->getPropertyAttributes() &
1653         ObjCPropertyAttribute::kind_readwrite) {
1654       Out << (first ? "" : ", ") << "readwrite";
1655       first = false;
1656     }
1657     if (PDecl->getPropertyAttributes() & ObjCPropertyAttribute::kind_readonly) {
1658       Out << (first ? "" : ", ") << "readonly";
1659       first = false;
1660     }
1661 
1662     if (PDecl->getPropertyAttributes() & ObjCPropertyAttribute::kind_getter) {
1663       Out << (first ? "" : ", ") << "getter = ";
1664       PDecl->getGetterName().print(Out);
1665       first = false;
1666     }
1667     if (PDecl->getPropertyAttributes() & ObjCPropertyAttribute::kind_setter) {
1668       Out << (first ? "" : ", ") << "setter = ";
1669       PDecl->getSetterName().print(Out);
1670       first = false;
1671     }
1672 
1673     if (PDecl->getPropertyAttributes() &
1674         ObjCPropertyAttribute::kind_nullability) {
1675       if (auto nullability = AttributedType::stripOuterNullability(T)) {
1676         if (*nullability == NullabilityKind::Unspecified &&
1677             (PDecl->getPropertyAttributes() &
1678              ObjCPropertyAttribute::kind_null_resettable)) {
1679           Out << (first ? "" : ", ") << "null_resettable";
1680         } else {
1681           Out << (first ? "" : ", ")
1682               << getNullabilitySpelling(*nullability, true);
1683         }
1684         first = false;
1685       }
1686     }
1687 
1688     (void) first; // Silence dead store warning due to idiomatic code.
1689     Out << ")";
1690   }
1691   std::string TypeStr = PDecl->getASTContext().getUnqualifiedObjCPointerType(T).
1692       getAsString(Policy);
1693   Out << ' ' << TypeStr;
1694   if (!StringRef(TypeStr).ends_with("*"))
1695     Out << ' ';
1696   Out << *PDecl;
1697   if (Policy.PolishForDeclaration)
1698     Out << ';';
1699 }
1700 
1701 void DeclPrinter::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *PID) {
1702   if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize)
1703     Out << "@synthesize ";
1704   else
1705     Out << "@dynamic ";
1706   Out << *PID->getPropertyDecl();
1707   if (PID->getPropertyIvarDecl())
1708     Out << '=' << *PID->getPropertyIvarDecl();
1709 }
1710 
1711 void DeclPrinter::VisitUsingDecl(UsingDecl *D) {
1712   if (!D->isAccessDeclaration())
1713     Out << "using ";
1714   if (D->hasTypename())
1715     Out << "typename ";
1716   D->getQualifier()->print(Out, Policy);
1717 
1718   // Use the correct record name when the using declaration is used for
1719   // inheriting constructors.
1720   for (const auto *Shadow : D->shadows()) {
1721     if (const auto *ConstructorShadow =
1722             dyn_cast<ConstructorUsingShadowDecl>(Shadow)) {
1723       assert(Shadow->getDeclContext() == ConstructorShadow->getDeclContext());
1724       Out << *ConstructorShadow->getNominatedBaseClass();
1725       return;
1726     }
1727   }
1728   Out << *D;
1729 }
1730 
1731 void DeclPrinter::VisitUsingEnumDecl(UsingEnumDecl *D) {
1732   Out << "using enum " << D->getEnumDecl();
1733 }
1734 
1735 void
1736 DeclPrinter::VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D) {
1737   Out << "using typename ";
1738   D->getQualifier()->print(Out, Policy);
1739   Out << D->getDeclName();
1740 }
1741 
1742 void DeclPrinter::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
1743   if (!D->isAccessDeclaration())
1744     Out << "using ";
1745   D->getQualifier()->print(Out, Policy);
1746   Out << D->getDeclName();
1747 }
1748 
1749 void DeclPrinter::VisitUsingShadowDecl(UsingShadowDecl *D) {
1750   // ignore
1751 }
1752 
1753 void DeclPrinter::VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D) {
1754   Out << "#pragma omp threadprivate";
1755   if (!D->varlist_empty()) {
1756     for (OMPThreadPrivateDecl::varlist_iterator I = D->varlist_begin(),
1757                                                 E = D->varlist_end();
1758                                                 I != E; ++I) {
1759       Out << (I == D->varlist_begin() ? '(' : ',');
1760       NamedDecl *ND = cast<DeclRefExpr>(*I)->getDecl();
1761       ND->printQualifiedName(Out);
1762     }
1763     Out << ")";
1764   }
1765 }
1766 
1767 void DeclPrinter::VisitHLSLBufferDecl(HLSLBufferDecl *D) {
1768   if (D->isCBuffer())
1769     Out << "cbuffer ";
1770   else
1771     Out << "tbuffer ";
1772 
1773   Out << *D;
1774 
1775   prettyPrintAttributes(D);
1776 
1777   Out << " {\n";
1778   VisitDeclContext(D);
1779   Indent() << "}";
1780 }
1781 
1782 void DeclPrinter::VisitOMPAllocateDecl(OMPAllocateDecl *D) {
1783   Out << "#pragma omp allocate";
1784   if (!D->varlist_empty()) {
1785     for (OMPAllocateDecl::varlist_iterator I = D->varlist_begin(),
1786                                            E = D->varlist_end();
1787          I != E; ++I) {
1788       Out << (I == D->varlist_begin() ? '(' : ',');
1789       NamedDecl *ND = cast<DeclRefExpr>(*I)->getDecl();
1790       ND->printQualifiedName(Out);
1791     }
1792     Out << ")";
1793   }
1794   if (!D->clauselist_empty()) {
1795     OMPClausePrinter Printer(Out, Policy);
1796     for (OMPClause *C : D->clauselists()) {
1797       Out << " ";
1798       Printer.Visit(C);
1799     }
1800   }
1801 }
1802 
1803 void DeclPrinter::VisitOMPRequiresDecl(OMPRequiresDecl *D) {
1804   Out << "#pragma omp requires ";
1805   if (!D->clauselist_empty()) {
1806     OMPClausePrinter Printer(Out, Policy);
1807     for (auto I = D->clauselist_begin(), E = D->clauselist_end(); I != E; ++I)
1808       Printer.Visit(*I);
1809   }
1810 }
1811 
1812 void DeclPrinter::VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D) {
1813   if (!D->isInvalidDecl()) {
1814     Out << "#pragma omp declare reduction (";
1815     if (D->getDeclName().getNameKind() == DeclarationName::CXXOperatorName) {
1816       const char *OpName =
1817           getOperatorSpelling(D->getDeclName().getCXXOverloadedOperator());
1818       assert(OpName && "not an overloaded operator");
1819       Out << OpName;
1820     } else {
1821       assert(D->getDeclName().isIdentifier());
1822       D->printName(Out, Policy);
1823     }
1824     Out << " : ";
1825     D->getType().print(Out, Policy);
1826     Out << " : ";
1827     D->getCombiner()->printPretty(Out, nullptr, Policy, 0, "\n", &Context);
1828     Out << ")";
1829     if (auto *Init = D->getInitializer()) {
1830       Out << " initializer(";
1831       switch (D->getInitializerKind()) {
1832       case OMPDeclareReductionInitKind::Direct:
1833         Out << "omp_priv(";
1834         break;
1835       case OMPDeclareReductionInitKind::Copy:
1836         Out << "omp_priv = ";
1837         break;
1838       case OMPDeclareReductionInitKind::Call:
1839         break;
1840       }
1841       Init->printPretty(Out, nullptr, Policy, 0, "\n", &Context);
1842       if (D->getInitializerKind() == OMPDeclareReductionInitKind::Direct)
1843         Out << ")";
1844       Out << ")";
1845     }
1846   }
1847 }
1848 
1849 void DeclPrinter::VisitOMPDeclareMapperDecl(OMPDeclareMapperDecl *D) {
1850   if (!D->isInvalidDecl()) {
1851     Out << "#pragma omp declare mapper (";
1852     D->printName(Out, Policy);
1853     Out << " : ";
1854     D->getType().print(Out, Policy);
1855     Out << " ";
1856     Out << D->getVarName();
1857     Out << ")";
1858     if (!D->clauselist_empty()) {
1859       OMPClausePrinter Printer(Out, Policy);
1860       for (auto *C : D->clauselists()) {
1861         Out << " ";
1862         Printer.Visit(C);
1863       }
1864     }
1865   }
1866 }
1867 
1868 void DeclPrinter::VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D) {
1869   D->getInit()->printPretty(Out, nullptr, Policy, Indentation, "\n", &Context);
1870 }
1871 
1872 void DeclPrinter::VisitTemplateTypeParmDecl(const TemplateTypeParmDecl *TTP) {
1873   if (const TypeConstraint *TC = TTP->getTypeConstraint())
1874     TC->print(Out, Policy);
1875   else if (TTP->wasDeclaredWithTypename())
1876     Out << "typename";
1877   else
1878     Out << "class";
1879 
1880   if (TTP->isParameterPack())
1881     Out << " ...";
1882   else if (TTP->getDeclName())
1883     Out << ' ';
1884 
1885   if (TTP->getDeclName()) {
1886     if (Policy.CleanUglifiedParameters && TTP->getIdentifier())
1887       Out << TTP->getIdentifier()->deuglifiedName();
1888     else
1889       Out << TTP->getDeclName();
1890   }
1891 
1892   if (TTP->hasDefaultArgument()) {
1893     Out << " = ";
1894     TTP->getDefaultArgument().getArgument().print(Policy, Out,
1895                                                   /*IncludeType=*/false);
1896   }
1897 }
1898 
1899 void DeclPrinter::VisitNonTypeTemplateParmDecl(
1900     const NonTypeTemplateParmDecl *NTTP) {
1901   StringRef Name;
1902   if (IdentifierInfo *II = NTTP->getIdentifier())
1903     Name =
1904         Policy.CleanUglifiedParameters ? II->deuglifiedName() : II->getName();
1905   printDeclType(NTTP->getType(), Name, NTTP->isParameterPack());
1906 
1907   if (NTTP->hasDefaultArgument()) {
1908     Out << " = ";
1909     NTTP->getDefaultArgument().getArgument().print(Policy, Out,
1910                                                    /*IncludeType=*/false);
1911   }
1912 }
1913