xref: /freebsd/contrib/llvm-project/clang/lib/AST/DeclPrinter.cpp (revision e64bea71c21eb42e97aa615188ba91f6cce0d36d) 
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     void PrintOpenACCRoutineOnLambda(Decl *D);
53 
54   public:
55     DeclPrinter(raw_ostream &Out, const PrintingPolicy &Policy,
56                 const ASTContext &Context, unsigned Indentation = 0,
57                 bool PrintInstantiation = false)
58         : Out(Out), Policy(Policy), Context(Context), Indentation(Indentation),
59           PrintInstantiation(PrintInstantiation) {}
60 
61     void VisitDeclContext(DeclContext *DC, bool Indent = true);
62 
63     void VisitTranslationUnitDecl(TranslationUnitDecl *D);
64     void VisitTypedefDecl(TypedefDecl *D);
65     void VisitTypeAliasDecl(TypeAliasDecl *D);
66     void VisitEnumDecl(EnumDecl *D);
67     void VisitRecordDecl(RecordDecl *D);
68     void VisitEnumConstantDecl(EnumConstantDecl *D);
69     void VisitEmptyDecl(EmptyDecl *D);
70     void VisitFunctionDecl(FunctionDecl *D);
71     void VisitFriendDecl(FriendDecl *D);
72     void VisitFieldDecl(FieldDecl *D);
73     void VisitVarDecl(VarDecl *D);
74     void VisitLabelDecl(LabelDecl *D);
75     void VisitParmVarDecl(ParmVarDecl *D);
76     void VisitFileScopeAsmDecl(FileScopeAsmDecl *D);
77     void VisitTopLevelStmtDecl(TopLevelStmtDecl *D);
78     void VisitImportDecl(ImportDecl *D);
79     void VisitStaticAssertDecl(StaticAssertDecl *D);
80     void VisitNamespaceDecl(NamespaceDecl *D);
81     void VisitUsingDirectiveDecl(UsingDirectiveDecl *D);
82     void VisitNamespaceAliasDecl(NamespaceAliasDecl *D);
83     void VisitCXXRecordDecl(CXXRecordDecl *D);
84     void VisitLinkageSpecDecl(LinkageSpecDecl *D);
85     void VisitTemplateDecl(const TemplateDecl *D);
86     void VisitFunctionTemplateDecl(FunctionTemplateDecl *D);
87     void VisitClassTemplateDecl(ClassTemplateDecl *D);
88     void VisitClassTemplateSpecializationDecl(
89                                             ClassTemplateSpecializationDecl *D);
90     void VisitClassTemplatePartialSpecializationDecl(
91                                      ClassTemplatePartialSpecializationDecl *D);
92     void VisitObjCMethodDecl(ObjCMethodDecl *D);
93     void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
94     void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
95     void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
96     void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
97     void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
98     void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
99     void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
100     void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
101     void VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D);
102     void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D);
103     void VisitUsingDecl(UsingDecl *D);
104     void VisitUsingEnumDecl(UsingEnumDecl *D);
105     void VisitUsingShadowDecl(UsingShadowDecl *D);
106     void VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D);
107     void VisitOMPAllocateDecl(OMPAllocateDecl *D);
108     void VisitOMPRequiresDecl(OMPRequiresDecl *D);
109     void VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D);
110     void VisitOMPDeclareMapperDecl(OMPDeclareMapperDecl *D);
111     void VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D);
112     void VisitTemplateTypeParmDecl(const TemplateTypeParmDecl *TTP);
113     void VisitNonTypeTemplateParmDecl(const NonTypeTemplateParmDecl *NTTP);
114     void VisitHLSLBufferDecl(HLSLBufferDecl *D);
115 
116     void VisitOpenACCDeclareDecl(OpenACCDeclareDecl *D);
117     void VisitOpenACCRoutineDecl(OpenACCRoutineDecl *D);
118 
119     void printTemplateParameters(const TemplateParameterList *Params,
120                                  bool OmitTemplateKW = false);
121     void printTemplateArguments(ArrayRef<TemplateArgument> Args,
122                                 const TemplateParameterList *Params);
123     void printTemplateArguments(ArrayRef<TemplateArgumentLoc> Args,
124                                 const TemplateParameterList *Params);
125     enum class AttrPosAsWritten { Default = 0, Left, Right };
126     bool
127     prettyPrintAttributes(const Decl *D,
128                           AttrPosAsWritten Pos = AttrPosAsWritten::Default);
129     void prettyPrintPragmas(Decl *D);
130     void printDeclType(QualType T, StringRef DeclName, bool Pack = false);
131   };
132 }
133 
134 void Decl::print(raw_ostream &Out, unsigned Indentation,
135                  bool PrintInstantiation) const {
136   print(Out, getASTContext().getPrintingPolicy(), Indentation, PrintInstantiation);
137 }
138 
139 void Decl::print(raw_ostream &Out, const PrintingPolicy &Policy,
140                  unsigned Indentation, bool PrintInstantiation) const {
141   DeclPrinter Printer(Out, Policy, getASTContext(), Indentation,
142                       PrintInstantiation);
143   Printer.Visit(const_cast<Decl*>(this));
144 }
145 
146 void TemplateParameterList::print(raw_ostream &Out, const ASTContext &Context,
147                                   bool OmitTemplateKW) const {
148   print(Out, Context, Context.getPrintingPolicy(), OmitTemplateKW);
149 }
150 
151 void TemplateParameterList::print(raw_ostream &Out, const ASTContext &Context,
152                                   const PrintingPolicy &Policy,
153                                   bool OmitTemplateKW) const {
154   DeclPrinter Printer(Out, Policy, Context);
155   Printer.printTemplateParameters(this, OmitTemplateKW);
156 }
157 
158 static QualType GetBaseType(QualType T) {
159   // FIXME: This should be on the Type class!
160   QualType BaseType = T;
161   while (!BaseType->isSpecifierType()) {
162     if (const PointerType *PTy = BaseType->getAs<PointerType>())
163       BaseType = PTy->getPointeeType();
164     else if (const ObjCObjectPointerType *OPT =
165                  BaseType->getAs<ObjCObjectPointerType>())
166       BaseType = OPT->getPointeeType();
167     else if (const BlockPointerType *BPy = BaseType->getAs<BlockPointerType>())
168       BaseType = BPy->getPointeeType();
169     else if (const ArrayType *ATy = dyn_cast<ArrayType>(BaseType))
170       BaseType = ATy->getElementType();
171     else if (const FunctionType *FTy = BaseType->getAs<FunctionType>())
172       BaseType = FTy->getReturnType();
173     else if (const VectorType *VTy = BaseType->getAs<VectorType>())
174       BaseType = VTy->getElementType();
175     else if (const ReferenceType *RTy = BaseType->getAs<ReferenceType>())
176       BaseType = RTy->getPointeeType();
177     else if (const AutoType *ATy = BaseType->getAs<AutoType>())
178       BaseType = ATy->getDeducedType();
179     else if (const ParenType *PTy = BaseType->getAs<ParenType>())
180       BaseType = PTy->desugar();
181     else
182       // This must be a syntax error.
183       break;
184   }
185   return BaseType;
186 }
187 
188 static QualType getDeclType(Decl* D) {
189   if (TypedefNameDecl* TDD = dyn_cast<TypedefNameDecl>(D))
190     return TDD->getUnderlyingType();
191   if (ValueDecl* VD = dyn_cast<ValueDecl>(D))
192     return VD->getType();
193   return QualType();
194 }
195 
196 void Decl::printGroup(Decl** Begin, unsigned NumDecls,
197                       raw_ostream &Out, const PrintingPolicy &Policy,
198                       unsigned Indentation) {
199   if (NumDecls == 1) {
200     (*Begin)->print(Out, Policy, Indentation);
201     return;
202   }
203 
204   Decl** End = Begin + NumDecls;
205   TagDecl* TD = dyn_cast<TagDecl>(*Begin);
206   if (TD)
207     ++Begin;
208 
209   PrintingPolicy SubPolicy(Policy);
210 
211   bool isFirst = true;
212   for ( ; Begin != End; ++Begin) {
213     if (isFirst) {
214       if(TD)
215         SubPolicy.IncludeTagDefinition = true;
216       SubPolicy.SuppressSpecifiers = false;
217       isFirst = false;
218     } else {
219       if (!isFirst) Out << ", ";
220       SubPolicy.IncludeTagDefinition = false;
221       SubPolicy.SuppressSpecifiers = true;
222     }
223 
224     (*Begin)->print(Out, SubPolicy, Indentation);
225   }
226 }
227 
228 LLVM_DUMP_METHOD void DeclContext::dumpDeclContext() const {
229   // Get the translation unit
230   const DeclContext *DC = this;
231   while (!DC->isTranslationUnit())
232     DC = DC->getParent();
233 
234   ASTContext &Ctx = cast<TranslationUnitDecl>(DC)->getASTContext();
235   DeclPrinter Printer(llvm::errs(), Ctx.getPrintingPolicy(), Ctx, 0);
236   Printer.VisitDeclContext(const_cast<DeclContext *>(this), /*Indent=*/false);
237 }
238 
239 raw_ostream& DeclPrinter::Indent(unsigned Indentation) {
240   for (unsigned i = 0; i != Indentation; ++i)
241     Out << "  ";
242   return Out;
243 }
244 
245 static DeclPrinter::AttrPosAsWritten getPosAsWritten(const Attr *A,
246                                                      const Decl *D) {
247   SourceLocation ALoc = A->getLoc();
248   SourceLocation DLoc = D->getLocation();
249   const ASTContext &C = D->getASTContext();
250   if (ALoc.isInvalid() || DLoc.isInvalid())
251     return DeclPrinter::AttrPosAsWritten::Left;
252 
253   if (C.getSourceManager().isBeforeInTranslationUnit(ALoc, DLoc))
254     return DeclPrinter::AttrPosAsWritten::Left;
255 
256   return DeclPrinter::AttrPosAsWritten::Right;
257 }
258 
259 // returns true if an attribute was printed.
260 bool DeclPrinter::prettyPrintAttributes(const Decl *D,
261                                         AttrPosAsWritten Pos /*=Default*/) {
262   bool hasPrinted = false;
263 
264   if (D->hasAttrs()) {
265     const AttrVec &Attrs = D->getAttrs();
266     for (auto *A : Attrs) {
267       if (A->isInherited() || A->isImplicit())
268         continue;
269       // Print out the keyword attributes, they aren't regular attributes.
270       if (Policy.PolishForDeclaration && !A->isKeywordAttribute())
271         continue;
272       switch (A->getKind()) {
273 #define ATTR(X)
274 #define PRAGMA_SPELLING_ATTR(X) case attr::X:
275 #include "clang/Basic/AttrList.inc"
276         break;
277       default:
278         AttrPosAsWritten APos = getPosAsWritten(A, D);
279         assert(APos != AttrPosAsWritten::Default &&
280                "Default not a valid for an attribute location");
281         if (Pos == AttrPosAsWritten::Default || Pos == APos) {
282           if (Pos != AttrPosAsWritten::Left)
283             Out << ' ';
284           A->printPretty(Out, Policy);
285           hasPrinted = true;
286           if (Pos == AttrPosAsWritten::Left)
287             Out << ' ';
288         }
289         break;
290       }
291     }
292   }
293   return hasPrinted;
294 }
295 
296 void DeclPrinter::PrintOpenACCRoutineOnLambda(Decl *D) {
297   CXXRecordDecl *CXXRD = nullptr;
298   if (const auto *VD = dyn_cast<VarDecl>(D)) {
299     if (const auto *Init = VD->getInit())
300       CXXRD = Init->getType().isNull() ? nullptr
301                                        : Init->getType()->getAsCXXRecordDecl();
302   } else if (const auto *FD = dyn_cast<FieldDecl>(D)) {
303     CXXRD =
304         FD->getType().isNull() ? nullptr : FD->getType()->getAsCXXRecordDecl();
305   }
306 
307   if (!CXXRD || !CXXRD->isLambda())
308     return;
309 
310   if (const auto *Call = CXXRD->getLambdaCallOperator()) {
311     for (auto *A : Call->specific_attrs<OpenACCRoutineDeclAttr>()) {
312       A->printPretty(Out, Policy);
313       Indent();
314     }
315   }
316 }
317 
318 void DeclPrinter::prettyPrintPragmas(Decl *D) {
319   if (Policy.PolishForDeclaration)
320     return;
321 
322   PrintOpenACCRoutineOnLambda(D);
323 
324   if (D->hasAttrs()) {
325     AttrVec &Attrs = D->getAttrs();
326     for (auto *A : Attrs) {
327       switch (A->getKind()) {
328 #define ATTR(X)
329 #define PRAGMA_SPELLING_ATTR(X) case attr::X:
330 #include "clang/Basic/AttrList.inc"
331         A->printPretty(Out, Policy);
332         Indent();
333         break;
334       default:
335         break;
336       }
337     }
338   }
339 }
340 
341 void DeclPrinter::printDeclType(QualType T, StringRef DeclName, bool Pack) {
342   // Normally, a PackExpansionType is written as T[3]... (for instance, as a
343   // template argument), but if it is the type of a declaration, the ellipsis
344   // is placed before the name being declared.
345   if (auto *PET = T->getAs<PackExpansionType>()) {
346     Pack = true;
347     T = PET->getPattern();
348   }
349   T.print(Out, Policy, (Pack ? "..." : "") + DeclName, Indentation);
350 }
351 
352 void DeclPrinter::ProcessDeclGroup(SmallVectorImpl<Decl*>& Decls) {
353   this->Indent();
354   Decl::printGroup(Decls.data(), Decls.size(), Out, Policy, Indentation);
355   Out << ";\n";
356   Decls.clear();
357 
358 }
359 
360 void DeclPrinter::Print(AccessSpecifier AS) {
361   const auto AccessSpelling = getAccessSpelling(AS);
362   if (AccessSpelling.empty())
363     llvm_unreachable("No access specifier!");
364   Out << AccessSpelling;
365 }
366 
367 void DeclPrinter::PrintConstructorInitializers(CXXConstructorDecl *CDecl,
368                                                std::string &Proto) {
369   bool HasInitializerList = false;
370   for (const auto *BMInitializer : CDecl->inits()) {
371     if (BMInitializer->isInClassMemberInitializer())
372       continue;
373     if (!BMInitializer->isWritten())
374       continue;
375 
376     if (!HasInitializerList) {
377       Proto += " : ";
378       Out << Proto;
379       Proto.clear();
380       HasInitializerList = true;
381     } else
382       Out << ", ";
383 
384     if (BMInitializer->isAnyMemberInitializer()) {
385       FieldDecl *FD = BMInitializer->getAnyMember();
386       Out << *FD;
387     } else if (BMInitializer->isDelegatingInitializer()) {
388       Out << CDecl->getNameAsString();
389     } else {
390       Out << QualType(BMInitializer->getBaseClass(), 0).getAsString(Policy);
391     }
392 
393     if (Expr *Init = BMInitializer->getInit()) {
394       bool OutParens = !isa<InitListExpr>(Init);
395 
396       if (OutParens)
397         Out << "(";
398 
399       if (ExprWithCleanups *Tmp = dyn_cast<ExprWithCleanups>(Init))
400         Init = Tmp->getSubExpr();
401 
402       Init = Init->IgnoreParens();
403 
404       Expr *SimpleInit = nullptr;
405       Expr **Args = nullptr;
406       unsigned NumArgs = 0;
407       if (ParenListExpr *ParenList = dyn_cast<ParenListExpr>(Init)) {
408         Args = ParenList->getExprs();
409         NumArgs = ParenList->getNumExprs();
410       } else if (CXXConstructExpr *Construct =
411                      dyn_cast<CXXConstructExpr>(Init)) {
412         Args = Construct->getArgs();
413         NumArgs = Construct->getNumArgs();
414       } else
415         SimpleInit = Init;
416 
417       if (SimpleInit)
418         SimpleInit->printPretty(Out, nullptr, Policy, Indentation, "\n",
419                                 &Context);
420       else {
421         for (unsigned I = 0; I != NumArgs; ++I) {
422           assert(Args[I] != nullptr && "Expected non-null Expr");
423           if (isa<CXXDefaultArgExpr>(Args[I]))
424             break;
425 
426           if (I)
427             Out << ", ";
428           Args[I]->printPretty(Out, nullptr, Policy, Indentation, "\n",
429                                &Context);
430         }
431       }
432 
433       if (OutParens)
434         Out << ")";
435     } else {
436       Out << "()";
437     }
438 
439     if (BMInitializer->isPackExpansion())
440       Out << "...";
441   }
442 }
443 
444 //----------------------------------------------------------------------------
445 // Common C declarations
446 //----------------------------------------------------------------------------
447 
448 void DeclPrinter::VisitDeclContext(DeclContext *DC, bool Indent) {
449   if (Policy.TerseOutput)
450     return;
451 
452   if (Indent)
453     Indentation += Policy.Indentation;
454 
455   SmallVector<Decl*, 2> Decls;
456   for (DeclContext::decl_iterator D = DC->decls_begin(), DEnd = DC->decls_end();
457        D != DEnd; ++D) {
458 
459     // Don't print ObjCIvarDecls, as they are printed when visiting the
460     // containing ObjCInterfaceDecl.
461     if (isa<ObjCIvarDecl>(*D))
462       continue;
463 
464     // Skip over implicit declarations in pretty-printing mode.
465     if (D->isImplicit())
466       continue;
467 
468     // Don't print implicit specializations, as they are printed when visiting
469     // corresponding templates.
470     if (auto FD = dyn_cast<FunctionDecl>(*D))
471       if (FD->getTemplateSpecializationKind() == TSK_ImplicitInstantiation &&
472           !isa<ClassTemplateSpecializationDecl>(DC))
473         continue;
474 
475     // The next bits of code handle stuff like "struct {int x;} a,b"; we're
476     // forced to merge the declarations because there's no other way to
477     // refer to the struct in question.  When that struct is named instead, we
478     // also need to merge to avoid splitting off a stand-alone struct
479     // declaration that produces the warning ext_no_declarators in some
480     // contexts.
481     //
482     // This limited merging is safe without a bunch of other checks because it
483     // only merges declarations directly referring to the tag, not typedefs.
484     //
485     // Check whether the current declaration should be grouped with a previous
486     // non-free-standing tag declaration.
487     QualType CurDeclType = getDeclType(*D);
488     if (!Decls.empty() && !CurDeclType.isNull()) {
489       QualType BaseType = GetBaseType(CurDeclType);
490       if (!BaseType.isNull() && isa<ElaboratedType>(BaseType) &&
491           cast<ElaboratedType>(BaseType)->getOwnedTagDecl() == Decls[0]) {
492         Decls.push_back(*D);
493         continue;
494       }
495     }
496 
497     // If we have a merged group waiting to be handled, handle it now.
498     if (!Decls.empty())
499       ProcessDeclGroup(Decls);
500 
501     // If the current declaration is not a free standing declaration, save it
502     // so we can merge it with the subsequent declaration(s) using it.
503     if (isa<TagDecl>(*D) && !cast<TagDecl>(*D)->isFreeStanding()) {
504       Decls.push_back(*D);
505       continue;
506     }
507 
508     if (isa<AccessSpecDecl>(*D)) {
509       Indentation -= Policy.Indentation;
510       this->Indent();
511       Print(D->getAccess());
512       Out << ":\n";
513       Indentation += Policy.Indentation;
514       continue;
515     }
516 
517     this->Indent();
518     Visit(*D);
519 
520     // FIXME: Need to be able to tell the DeclPrinter when
521     const char *Terminator = nullptr;
522     if (isa<OMPThreadPrivateDecl>(*D) || isa<OMPDeclareReductionDecl>(*D) ||
523         isa<OMPDeclareMapperDecl>(*D) || isa<OMPRequiresDecl>(*D) ||
524         isa<OMPAllocateDecl>(*D))
525       Terminator = nullptr;
526     else if (isa<OpenACCDeclareDecl, OpenACCRoutineDecl>(*D))
527       Terminator = nullptr;
528     else if (isa<ObjCMethodDecl>(*D) && cast<ObjCMethodDecl>(*D)->hasBody())
529       Terminator = nullptr;
530     else if (auto FD = dyn_cast<FunctionDecl>(*D)) {
531       if (FD->doesThisDeclarationHaveABody() && !FD->isDefaulted())
532         Terminator = nullptr;
533       else
534         Terminator = ";";
535     } else if (auto TD = dyn_cast<FunctionTemplateDecl>(*D)) {
536       if (TD->getTemplatedDecl()->doesThisDeclarationHaveABody())
537         Terminator = nullptr;
538       else
539         Terminator = ";";
540     } else if (isa<NamespaceDecl, LinkageSpecDecl, ObjCImplementationDecl,
541                    ObjCInterfaceDecl, ObjCProtocolDecl, ObjCCategoryImplDecl,
542                    ObjCCategoryDecl, HLSLBufferDecl>(*D))
543       Terminator = nullptr;
544     else if (isa<EnumConstantDecl>(*D)) {
545       DeclContext::decl_iterator Next = D;
546       ++Next;
547       if (Next != DEnd)
548         Terminator = ",";
549     } else
550       Terminator = ";";
551 
552     if (Terminator)
553       Out << Terminator;
554     if (!Policy.TerseOutput &&
555         ((isa<FunctionDecl>(*D) &&
556           cast<FunctionDecl>(*D)->doesThisDeclarationHaveABody()) ||
557          (isa<FunctionTemplateDecl>(*D) &&
558           cast<FunctionTemplateDecl>(*D)->getTemplatedDecl()->doesThisDeclarationHaveABody())))
559       ; // StmtPrinter already added '\n' after CompoundStmt.
560     else
561       Out << "\n";
562 
563     // Declare target attribute is special one, natural spelling for the pragma
564     // assumes "ending" construct so print it here.
565     if (D->hasAttr<OMPDeclareTargetDeclAttr>())
566       Out << "#pragma omp end declare target\n";
567   }
568 
569   if (!Decls.empty())
570     ProcessDeclGroup(Decls);
571 
572   if (Indent)
573     Indentation -= Policy.Indentation;
574 }
575 
576 void DeclPrinter::VisitTranslationUnitDecl(TranslationUnitDecl *D) {
577   VisitDeclContext(D, false);
578 }
579 
580 void DeclPrinter::VisitTypedefDecl(TypedefDecl *D) {
581   if (!Policy.SuppressSpecifiers) {
582     Out << "typedef ";
583 
584     if (D->isModulePrivate())
585       Out << "__module_private__ ";
586   }
587   QualType Ty = D->getTypeSourceInfo()->getType();
588   Ty.print(Out, Policy, D->getName(), Indentation);
589   prettyPrintAttributes(D);
590 }
591 
592 void DeclPrinter::VisitTypeAliasDecl(TypeAliasDecl *D) {
593   Out << "using " << *D;
594   prettyPrintAttributes(D);
595   Out << " = " << D->getTypeSourceInfo()->getType().getAsString(Policy);
596 }
597 
598 void DeclPrinter::VisitEnumDecl(EnumDecl *D) {
599   if (!Policy.SuppressSpecifiers && D->isModulePrivate())
600     Out << "__module_private__ ";
601   Out << "enum";
602   if (D->isScoped()) {
603     if (D->isScopedUsingClassTag())
604       Out << " class";
605     else
606       Out << " struct";
607   }
608 
609   prettyPrintAttributes(D);
610 
611   if (D->getDeclName())
612     Out << ' ' << D->getDeclName();
613 
614   if (D->isFixed())
615     Out << " : " << D->getIntegerType().stream(Policy);
616 
617   if (D->isCompleteDefinition()) {
618     Out << " {\n";
619     VisitDeclContext(D);
620     Indent() << "}";
621   }
622 }
623 
624 void DeclPrinter::VisitRecordDecl(RecordDecl *D) {
625   if (!Policy.SuppressSpecifiers && D->isModulePrivate())
626     Out << "__module_private__ ";
627   Out << D->getKindName();
628 
629   prettyPrintAttributes(D);
630 
631   if (D->getIdentifier())
632     Out << ' ' << *D;
633 
634   if (D->isCompleteDefinition()) {
635     Out << " {\n";
636     VisitDeclContext(D);
637     Indent() << "}";
638   }
639 }
640 
641 void DeclPrinter::VisitEnumConstantDecl(EnumConstantDecl *D) {
642   Out << *D;
643   prettyPrintAttributes(D);
644   if (Expr *Init = D->getInitExpr()) {
645     Out << " = ";
646     Init->printPretty(Out, nullptr, Policy, Indentation, "\n", &Context);
647   }
648 }
649 
650 static void printExplicitSpecifier(ExplicitSpecifier ES, llvm::raw_ostream &Out,
651                                    PrintingPolicy &Policy, unsigned Indentation,
652                                    const ASTContext &Context) {
653   std::string Proto = "explicit";
654   llvm::raw_string_ostream EOut(Proto);
655   if (ES.getExpr()) {
656     EOut << "(";
657     ES.getExpr()->printPretty(EOut, nullptr, Policy, Indentation, "\n",
658                               &Context);
659     EOut << ")";
660   }
661   EOut << " ";
662   Out << Proto;
663 }
664 
665 static void MaybePrintTagKeywordIfSupressingScopes(PrintingPolicy &Policy,
666                                                    QualType T,
667                                                    llvm::raw_ostream &Out) {
668   StringRef prefix = T->isClassType()       ? "class "
669                      : T->isStructureType() ? "struct "
670                      : T->isUnionType()     ? "union "
671                                             : "";
672   Out << prefix;
673 }
674 
675 void DeclPrinter::VisitFunctionDecl(FunctionDecl *D) {
676   if (!D->getDescribedFunctionTemplate() &&
677       !D->isFunctionTemplateSpecialization()) {
678     prettyPrintPragmas(D);
679     prettyPrintAttributes(D, AttrPosAsWritten::Left);
680   }
681 
682   if (D->isFunctionTemplateSpecialization())
683     Out << "template<> ";
684   else if (!D->getDescribedFunctionTemplate()) {
685     for (unsigned I = 0, NumTemplateParams = D->getNumTemplateParameterLists();
686          I < NumTemplateParams; ++I)
687       printTemplateParameters(D->getTemplateParameterList(I));
688   }
689 
690   CXXConstructorDecl *CDecl = dyn_cast<CXXConstructorDecl>(D);
691   CXXConversionDecl *ConversionDecl = dyn_cast<CXXConversionDecl>(D);
692   CXXDeductionGuideDecl *GuideDecl = dyn_cast<CXXDeductionGuideDecl>(D);
693   if (!Policy.SuppressSpecifiers) {
694     switch (D->getStorageClass()) {
695     case SC_None: break;
696     case SC_Extern: Out << "extern "; break;
697     case SC_Static: Out << "static "; break;
698     case SC_PrivateExtern: Out << "__private_extern__ "; break;
699     case SC_Auto: case SC_Register:
700       llvm_unreachable("invalid for functions");
701     }
702 
703     if (D->isInlineSpecified())  Out << "inline ";
704     if (D->isVirtualAsWritten()) Out << "virtual ";
705     if (D->isModulePrivate())    Out << "__module_private__ ";
706     if (D->isConstexprSpecified() && !D->isExplicitlyDefaulted())
707       Out << "constexpr ";
708     if (D->isConsteval())        Out << "consteval ";
709     else if (D->isImmediateFunction())
710       Out << "immediate ";
711     ExplicitSpecifier ExplicitSpec = ExplicitSpecifier::getFromDecl(D);
712     if (ExplicitSpec.isSpecified())
713       printExplicitSpecifier(ExplicitSpec, Out, Policy, Indentation, Context);
714   }
715 
716   PrintingPolicy SubPolicy(Policy);
717   SubPolicy.SuppressSpecifiers = false;
718   std::string Proto;
719 
720   if (Policy.FullyQualifiedName) {
721     Proto += D->getQualifiedNameAsString();
722   } else {
723     llvm::raw_string_ostream OS(Proto);
724     if (!Policy.SuppressScope) {
725       if (const NestedNameSpecifier *NS = D->getQualifier()) {
726         NS->print(OS, Policy);
727       }
728     }
729     D->getNameInfo().printName(OS, Policy);
730   }
731 
732   if (GuideDecl)
733     Proto = GuideDecl->getDeducedTemplate()->getDeclName().getAsString();
734   if (D->isFunctionTemplateSpecialization()) {
735     llvm::raw_string_ostream POut(Proto);
736     DeclPrinter TArgPrinter(POut, SubPolicy, Context, Indentation);
737     const auto *TArgAsWritten = D->getTemplateSpecializationArgsAsWritten();
738     if (TArgAsWritten && !Policy.PrintAsCanonical)
739       TArgPrinter.printTemplateArguments(TArgAsWritten->arguments(), nullptr);
740     else if (const TemplateArgumentList *TArgs =
741                  D->getTemplateSpecializationArgs())
742       TArgPrinter.printTemplateArguments(TArgs->asArray(), nullptr);
743   }
744 
745   QualType Ty = D->getType();
746   while (const ParenType *PT = dyn_cast<ParenType>(Ty)) {
747     Proto = '(' + Proto + ')';
748     Ty = PT->getInnerType();
749   }
750 
751   if (const FunctionType *AFT = Ty->getAs<FunctionType>()) {
752     const FunctionProtoType *FT = nullptr;
753     if (D->hasWrittenPrototype())
754       FT = dyn_cast<FunctionProtoType>(AFT);
755 
756     Proto += "(";
757     if (FT) {
758       llvm::raw_string_ostream POut(Proto);
759       DeclPrinter ParamPrinter(POut, SubPolicy, Context, Indentation);
760       for (unsigned i = 0, e = D->getNumParams(); i != e; ++i) {
761         if (i) POut << ", ";
762         ParamPrinter.VisitParmVarDecl(D->getParamDecl(i));
763       }
764 
765       if (FT->isVariadic()) {
766         if (D->getNumParams()) POut << ", ";
767         POut << "...";
768       } else if (!D->getNumParams() && !Context.getLangOpts().CPlusPlus) {
769         // The function has a prototype, so it needs to retain the prototype
770         // in C.
771         POut << "void";
772       }
773     } else if (D->doesThisDeclarationHaveABody() && !D->hasPrototype()) {
774       for (unsigned i = 0, e = D->getNumParams(); i != e; ++i) {
775         if (i)
776           Proto += ", ";
777         Proto += D->getParamDecl(i)->getNameAsString();
778       }
779     }
780 
781     Proto += ")";
782 
783     if (FT) {
784       if (FT->isConst())
785         Proto += " const";
786       if (FT->isVolatile())
787         Proto += " volatile";
788       if (FT->isRestrict())
789         Proto += " restrict";
790 
791       switch (FT->getRefQualifier()) {
792       case RQ_None:
793         break;
794       case RQ_LValue:
795         Proto += " &";
796         break;
797       case RQ_RValue:
798         Proto += " &&";
799         break;
800       }
801     }
802 
803     if (FT && FT->hasDynamicExceptionSpec()) {
804       Proto += " throw(";
805       if (FT->getExceptionSpecType() == EST_MSAny)
806         Proto += "...";
807       else
808         for (unsigned I = 0, N = FT->getNumExceptions(); I != N; ++I) {
809           if (I)
810             Proto += ", ";
811 
812           Proto += FT->getExceptionType(I).getAsString(SubPolicy);
813         }
814       Proto += ")";
815     } else if (FT && isNoexceptExceptionSpec(FT->getExceptionSpecType())) {
816       Proto += " noexcept";
817       if (isComputedNoexcept(FT->getExceptionSpecType())) {
818         Proto += "(";
819         llvm::raw_string_ostream EOut(Proto);
820         FT->getNoexceptExpr()->printPretty(EOut, nullptr, SubPolicy,
821                                            Indentation, "\n", &Context);
822         Proto += ")";
823       }
824     }
825 
826     if (CDecl) {
827       if (!Policy.TerseOutput)
828         PrintConstructorInitializers(CDecl, Proto);
829     } else if (!ConversionDecl && !isa<CXXDestructorDecl>(D)) {
830       if (FT && FT->hasTrailingReturn()) {
831         if (!GuideDecl)
832           Out << "auto ";
833         Out << Proto << " -> ";
834         Proto.clear();
835       }
836       if (!Policy.SuppressTagKeyword && Policy.SuppressScope &&
837           !Policy.SuppressUnwrittenScope)
838         MaybePrintTagKeywordIfSupressingScopes(Policy, AFT->getReturnType(),
839                                                Out);
840       AFT->getReturnType().print(Out, Policy, Proto);
841       Proto.clear();
842     }
843     Out << Proto;
844 
845     if (const AssociatedConstraint &TrailingRequiresClause =
846             D->getTrailingRequiresClause()) {
847       Out << " requires ";
848       // FIXME: The printer could support printing expressions and types as if
849       // expanded by an index. Pass in the ArgumentPackSubstitutionIndex when
850       // that's supported.
851       TrailingRequiresClause.ConstraintExpr->printPretty(
852           Out, nullptr, SubPolicy, Indentation, "\n", &Context);
853     }
854   } else {
855     Ty.print(Out, Policy, Proto);
856   }
857 
858   prettyPrintAttributes(D, AttrPosAsWritten::Right);
859 
860   if (D->isPureVirtual())
861     Out << " = 0";
862   else if (D->isDeletedAsWritten()) {
863     Out << " = delete";
864     if (const StringLiteral *M = D->getDeletedMessage()) {
865       Out << "(";
866       M->outputString(Out);
867       Out << ")";
868     }
869   } else if (D->isExplicitlyDefaulted())
870     Out << " = default";
871   else if (D->doesThisDeclarationHaveABody()) {
872     if (!Policy.TerseOutput) {
873       if (!D->hasPrototype() && D->getNumParams()) {
874         // This is a K&R function definition, so we need to print the
875         // parameters.
876         Out << '\n';
877         DeclPrinter ParamPrinter(Out, SubPolicy, Context, Indentation);
878         Indentation += Policy.Indentation;
879         for (unsigned i = 0, e = D->getNumParams(); i != e; ++i) {
880           Indent();
881           ParamPrinter.VisitParmVarDecl(D->getParamDecl(i));
882           Out << ";\n";
883         }
884         Indentation -= Policy.Indentation;
885       }
886 
887       if (D->getBody())
888         D->getBody()->printPrettyControlled(Out, nullptr, SubPolicy, Indentation, "\n",
889                                   &Context);
890     } else {
891       if (!Policy.TerseOutput && isa<CXXConstructorDecl>(*D))
892         Out << " {}";
893     }
894   }
895 }
896 
897 void DeclPrinter::VisitFriendDecl(FriendDecl *D) {
898   if (TypeSourceInfo *TSI = D->getFriendType()) {
899     unsigned NumTPLists = D->getFriendTypeNumTemplateParameterLists();
900     for (unsigned i = 0; i < NumTPLists; ++i)
901       printTemplateParameters(D->getFriendTypeTemplateParameterList(i));
902     Out << "friend ";
903     Out << TSI->getType().getAsString(Policy);
904   }
905   else if (FunctionDecl *FD =
906       dyn_cast<FunctionDecl>(D->getFriendDecl())) {
907     Out << "friend ";
908     VisitFunctionDecl(FD);
909   }
910   else if (FunctionTemplateDecl *FTD =
911            dyn_cast<FunctionTemplateDecl>(D->getFriendDecl())) {
912     Out << "friend ";
913     VisitFunctionTemplateDecl(FTD);
914   }
915   else if (ClassTemplateDecl *CTD =
916            dyn_cast<ClassTemplateDecl>(D->getFriendDecl())) {
917     Out << "friend ";
918     VisitRedeclarableTemplateDecl(CTD);
919   }
920 
921   if (D->isPackExpansion())
922     Out << "...";
923 }
924 
925 void DeclPrinter::VisitFieldDecl(FieldDecl *D) {
926   prettyPrintPragmas(D);
927   // FIXME: add printing of pragma attributes if required.
928   if (!Policy.SuppressSpecifiers && D->isMutable())
929     Out << "mutable ";
930   if (!Policy.SuppressSpecifiers && D->isModulePrivate())
931     Out << "__module_private__ ";
932 
933   Out << D->getASTContext().getUnqualifiedObjCPointerType(D->getType()).
934          stream(Policy, D->getName(), Indentation);
935 
936   if (D->isBitField()) {
937     Out << " : ";
938     D->getBitWidth()->printPretty(Out, nullptr, Policy, Indentation, "\n",
939                                   &Context);
940   }
941 
942   Expr *Init = D->getInClassInitializer();
943   if (!Policy.SuppressInitializers && Init) {
944     if (D->getInClassInitStyle() == ICIS_ListInit)
945       Out << " ";
946     else
947       Out << " = ";
948     Init->printPretty(Out, nullptr, Policy, Indentation, "\n", &Context);
949   }
950   prettyPrintAttributes(D);
951 }
952 
953 void DeclPrinter::VisitLabelDecl(LabelDecl *D) {
954   Out << *D << ":";
955 }
956 
957 void DeclPrinter::VisitVarDecl(VarDecl *D) {
958   prettyPrintPragmas(D);
959 
960   prettyPrintAttributes(D, AttrPosAsWritten::Left);
961 
962   if (const auto *Param = dyn_cast<ParmVarDecl>(D);
963       Param && Param->isExplicitObjectParameter())
964     Out << "this ";
965 
966   QualType T = D->getTypeSourceInfo()
967     ? D->getTypeSourceInfo()->getType()
968     : D->getASTContext().getUnqualifiedObjCPointerType(D->getType());
969 
970   if (!Policy.SuppressSpecifiers) {
971     StorageClass SC = D->getStorageClass();
972     if (SC != SC_None)
973       Out << VarDecl::getStorageClassSpecifierString(SC) << " ";
974 
975     switch (D->getTSCSpec()) {
976     case TSCS_unspecified:
977       break;
978     case TSCS___thread:
979       Out << "__thread ";
980       break;
981     case TSCS__Thread_local:
982       Out << "_Thread_local ";
983       break;
984     case TSCS_thread_local:
985       Out << "thread_local ";
986       break;
987     }
988 
989     if (D->isModulePrivate())
990       Out << "__module_private__ ";
991 
992     if (D->isConstexpr()) {
993       Out << "constexpr ";
994       T.removeLocalConst();
995     }
996   }
997 
998   if (!Policy.SuppressTagKeyword && Policy.SuppressScope &&
999       !Policy.SuppressUnwrittenScope)
1000     MaybePrintTagKeywordIfSupressingScopes(Policy, T, Out);
1001 
1002   printDeclType(T, (isa<ParmVarDecl>(D) && Policy.CleanUglifiedParameters &&
1003                     D->getIdentifier())
1004                        ? D->getIdentifier()->deuglifiedName()
1005                        : D->getName());
1006 
1007   prettyPrintAttributes(D, AttrPosAsWritten::Right);
1008 
1009   Expr *Init = D->getInit();
1010   if (!Policy.SuppressInitializers && Init) {
1011     bool ImplicitInit = false;
1012     if (D->isCXXForRangeDecl()) {
1013       // FIXME: We should print the range expression instead.
1014       ImplicitInit = true;
1015     } else if (CXXConstructExpr *Construct =
1016                    dyn_cast<CXXConstructExpr>(Init->IgnoreImplicit())) {
1017       if (D->getInitStyle() == VarDecl::CallInit &&
1018           !Construct->isListInitialization()) {
1019         ImplicitInit = Construct->getNumArgs() == 0 ||
1020                        Construct->getArg(0)->isDefaultArgument();
1021       }
1022     }
1023     if (!ImplicitInit) {
1024       if ((D->getInitStyle() == VarDecl::CallInit) && !isa<ParenListExpr>(Init))
1025         Out << "(";
1026       else if (D->getInitStyle() == VarDecl::CInit) {
1027         Out << " = ";
1028       }
1029       PrintingPolicy SubPolicy(Policy);
1030       SubPolicy.SuppressSpecifiers = false;
1031       SubPolicy.IncludeTagDefinition = false;
1032       Init->printPretty(Out, nullptr, SubPolicy, Indentation, "\n", &Context);
1033       if ((D->getInitStyle() == VarDecl::CallInit) && !isa<ParenListExpr>(Init))
1034         Out << ")";
1035     }
1036   }
1037 }
1038 
1039 void DeclPrinter::VisitParmVarDecl(ParmVarDecl *D) {
1040   VisitVarDecl(D);
1041 }
1042 
1043 void DeclPrinter::VisitFileScopeAsmDecl(FileScopeAsmDecl *D) {
1044   Out << "__asm (";
1045   D->getAsmStringExpr()->printPretty(Out, nullptr, Policy, Indentation, "\n",
1046                                      &Context);
1047   Out << ")";
1048 }
1049 
1050 void DeclPrinter::VisitTopLevelStmtDecl(TopLevelStmtDecl *D) {
1051   assert(D->getStmt());
1052   D->getStmt()->printPretty(Out, nullptr, Policy, Indentation, "\n", &Context);
1053 }
1054 
1055 void DeclPrinter::VisitImportDecl(ImportDecl *D) {
1056   Out << "@import " << D->getImportedModule()->getFullModuleName()
1057       << ";\n";
1058 }
1059 
1060 void DeclPrinter::VisitStaticAssertDecl(StaticAssertDecl *D) {
1061   Out << "static_assert(";
1062   D->getAssertExpr()->printPretty(Out, nullptr, Policy, Indentation, "\n",
1063                                   &Context);
1064   if (Expr *E = D->getMessage()) {
1065     Out << ", ";
1066     E->printPretty(Out, nullptr, Policy, Indentation, "\n", &Context);
1067   }
1068   Out << ")";
1069 }
1070 
1071 //----------------------------------------------------------------------------
1072 // C++ declarations
1073 //----------------------------------------------------------------------------
1074 void DeclPrinter::VisitNamespaceDecl(NamespaceDecl *D) {
1075   if (D->isInline())
1076     Out << "inline ";
1077 
1078   Out << "namespace ";
1079   if (D->getDeclName())
1080     Out << D->getDeclName() << ' ';
1081   Out << "{\n";
1082 
1083   VisitDeclContext(D);
1084   Indent() << "}";
1085 }
1086 
1087 void DeclPrinter::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
1088   Out << "using namespace ";
1089   if (D->getQualifier())
1090     D->getQualifier()->print(Out, Policy);
1091   Out << *D->getNominatedNamespaceAsWritten();
1092 }
1093 
1094 void DeclPrinter::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
1095   Out << "namespace " << *D << " = ";
1096   if (D->getQualifier())
1097     D->getQualifier()->print(Out, Policy);
1098   Out << *D->getAliasedNamespace();
1099 }
1100 
1101 void DeclPrinter::VisitEmptyDecl(EmptyDecl *D) {
1102   prettyPrintAttributes(D);
1103 }
1104 
1105 void DeclPrinter::VisitCXXRecordDecl(CXXRecordDecl *D) {
1106   // FIXME: add printing of pragma attributes if required.
1107   if (!Policy.SuppressSpecifiers && D->isModulePrivate())
1108     Out << "__module_private__ ";
1109 
1110   Out << D->getKindName() << ' ';
1111 
1112   // FIXME: Move before printing the decl kind to match the behavior of the
1113   // attribute printing for variables and function where they are printed first.
1114   if (prettyPrintAttributes(D, AttrPosAsWritten::Left))
1115     Out << ' ';
1116 
1117   if (D->getIdentifier()) {
1118     if (auto *NNS = D->getQualifier())
1119       NNS->print(Out, Policy);
1120     Out << *D;
1121 
1122     if (auto *S = dyn_cast<ClassTemplateSpecializationDecl>(D)) {
1123       const TemplateParameterList *TParams =
1124           S->getSpecializedTemplate()->getTemplateParameters();
1125       const ASTTemplateArgumentListInfo *TArgAsWritten =
1126           S->getTemplateArgsAsWritten();
1127       if (TArgAsWritten && !Policy.PrintAsCanonical)
1128         printTemplateArguments(TArgAsWritten->arguments(), TParams);
1129       else
1130         printTemplateArguments(S->getTemplateArgs().asArray(), TParams);
1131     }
1132   }
1133 
1134   prettyPrintAttributes(D, AttrPosAsWritten::Right);
1135 
1136   if (D->isCompleteDefinition()) {
1137     Out << ' ';
1138     // Print the base classes
1139     if (D->getNumBases()) {
1140       Out << ": ";
1141       for (CXXRecordDecl::base_class_iterator Base = D->bases_begin(),
1142              BaseEnd = D->bases_end(); Base != BaseEnd; ++Base) {
1143         if (Base != D->bases_begin())
1144           Out << ", ";
1145 
1146         if (Base->isVirtual())
1147           Out << "virtual ";
1148 
1149         AccessSpecifier AS = Base->getAccessSpecifierAsWritten();
1150         if (AS != AS_none) {
1151           Print(AS);
1152           Out << " ";
1153         }
1154         Out << Base->getType().getAsString(Policy);
1155 
1156         if (Base->isPackExpansion())
1157           Out << "...";
1158       }
1159       Out << ' ';
1160     }
1161 
1162     // Print the class definition
1163     // FIXME: Doesn't print access specifiers, e.g., "public:"
1164     if (Policy.TerseOutput) {
1165       Out << "{}";
1166     } else {
1167       Out << "{\n";
1168       VisitDeclContext(D);
1169       Indent() << "}";
1170     }
1171   }
1172 }
1173 
1174 void DeclPrinter::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
1175   const char *l;
1176   if (D->getLanguage() == LinkageSpecLanguageIDs::C)
1177     l = "C";
1178   else {
1179     assert(D->getLanguage() == LinkageSpecLanguageIDs::CXX &&
1180            "unknown language in linkage specification");
1181     l = "C++";
1182   }
1183 
1184   Out << "extern \"" << l << "\" ";
1185   if (D->hasBraces()) {
1186     Out << "{\n";
1187     VisitDeclContext(D);
1188     Indent() << "}";
1189   } else
1190     Visit(*D->decls_begin());
1191 }
1192 
1193 void DeclPrinter::printTemplateParameters(const TemplateParameterList *Params,
1194                                           bool OmitTemplateKW) {
1195   assert(Params);
1196 
1197   // Don't print invented template parameter lists.
1198   if (!Params->empty() && Params->getParam(0)->isImplicit())
1199     return;
1200 
1201   if (!OmitTemplateKW)
1202     Out << "template ";
1203   Out << '<';
1204 
1205   bool NeedComma = false;
1206   for (const Decl *Param : *Params) {
1207     if (Param->isImplicit())
1208       continue;
1209 
1210     if (NeedComma)
1211       Out << ", ";
1212     else
1213       NeedComma = true;
1214 
1215     if (const auto *TTP = dyn_cast<TemplateTypeParmDecl>(Param)) {
1216       VisitTemplateTypeParmDecl(TTP);
1217     } else if (auto NTTP = dyn_cast<NonTypeTemplateParmDecl>(Param)) {
1218       VisitNonTypeTemplateParmDecl(NTTP);
1219     } else if (auto TTPD = dyn_cast<TemplateTemplateParmDecl>(Param)) {
1220       VisitTemplateDecl(TTPD);
1221       // FIXME: print the default argument, if present.
1222     }
1223   }
1224 
1225   Out << '>';
1226 
1227   if (const Expr *RequiresClause = Params->getRequiresClause()) {
1228     Out << " requires ";
1229     RequiresClause->printPretty(Out, nullptr, Policy, Indentation, "\n",
1230                                 &Context);
1231   }
1232 
1233   if (!OmitTemplateKW)
1234     Out << ' ';
1235 }
1236 
1237 void DeclPrinter::printTemplateArguments(ArrayRef<TemplateArgument> Args,
1238                                          const TemplateParameterList *Params) {
1239   Out << "<";
1240   for (size_t I = 0, E = Args.size(); I < E; ++I) {
1241     if (I)
1242       Out << ", ";
1243     if (!Params)
1244       Args[I].print(Policy, Out, /*IncludeType*/ true);
1245     else
1246       Args[I].print(Policy, Out,
1247                     TemplateParameterList::shouldIncludeTypeForArgument(
1248                         Policy, Params, I));
1249   }
1250   Out << ">";
1251 }
1252 
1253 void DeclPrinter::printTemplateArguments(ArrayRef<TemplateArgumentLoc> Args,
1254                                          const TemplateParameterList *Params) {
1255   Out << "<";
1256   for (size_t I = 0, E = Args.size(); I < E; ++I) {
1257     if (I)
1258       Out << ", ";
1259     if (!Params)
1260       Args[I].getArgument().print(Policy, Out, /*IncludeType*/ true);
1261     else
1262       Args[I].getArgument().print(
1263           Policy, Out,
1264           TemplateParameterList::shouldIncludeTypeForArgument(Policy, Params,
1265                                                               I));
1266   }
1267   Out << ">";
1268 }
1269 
1270 void DeclPrinter::VisitTemplateDecl(const TemplateDecl *D) {
1271   printTemplateParameters(D->getTemplateParameters());
1272 
1273   if (const TemplateTemplateParmDecl *TTP =
1274         dyn_cast<TemplateTemplateParmDecl>(D)) {
1275     if (TTP->wasDeclaredWithTypename())
1276       Out << "typename";
1277     else
1278       Out << "class";
1279 
1280     if (TTP->isParameterPack())
1281       Out << " ...";
1282     else if (TTP->getDeclName())
1283       Out << ' ';
1284 
1285     if (TTP->getDeclName()) {
1286       if (Policy.CleanUglifiedParameters && TTP->getIdentifier())
1287         Out << TTP->getIdentifier()->deuglifiedName();
1288       else
1289         Out << TTP->getDeclName();
1290     }
1291   } else if (auto *TD = D->getTemplatedDecl())
1292     Visit(TD);
1293   else if (const auto *Concept = dyn_cast<ConceptDecl>(D)) {
1294     Out << "concept " << Concept->getName() << " = " ;
1295     Concept->getConstraintExpr()->printPretty(Out, nullptr, Policy, Indentation,
1296                                               "\n", &Context);
1297   }
1298 }
1299 
1300 void DeclPrinter::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
1301   prettyPrintPragmas(D->getTemplatedDecl());
1302   // Print any leading template parameter lists.
1303   if (const FunctionDecl *FD = D->getTemplatedDecl()) {
1304     for (unsigned I = 0, NumTemplateParams = FD->getNumTemplateParameterLists();
1305          I < NumTemplateParams; ++I)
1306       printTemplateParameters(FD->getTemplateParameterList(I));
1307   }
1308   VisitRedeclarableTemplateDecl(D);
1309   // Declare target attribute is special one, natural spelling for the pragma
1310   // assumes "ending" construct so print it here.
1311   if (D->getTemplatedDecl()->hasAttr<OMPDeclareTargetDeclAttr>())
1312     Out << "#pragma omp end declare target\n";
1313 
1314   // Never print "instantiations" for deduction guides (they don't really
1315   // have them).
1316   if (PrintInstantiation &&
1317       !isa<CXXDeductionGuideDecl>(D->getTemplatedDecl())) {
1318     FunctionDecl *PrevDecl = D->getTemplatedDecl();
1319     const FunctionDecl *Def;
1320     if (PrevDecl->isDefined(Def) && Def != PrevDecl)
1321       return;
1322     for (auto *I : D->specializations())
1323       if (I->getTemplateSpecializationKind() == TSK_ImplicitInstantiation) {
1324         if (!PrevDecl->isThisDeclarationADefinition())
1325           Out << ";\n";
1326         Indent();
1327         prettyPrintPragmas(I);
1328         Visit(I);
1329       }
1330   }
1331 }
1332 
1333 void DeclPrinter::VisitClassTemplateDecl(ClassTemplateDecl *D) {
1334   VisitRedeclarableTemplateDecl(D);
1335 
1336   if (PrintInstantiation) {
1337     for (auto *I : D->specializations())
1338       if (I->getSpecializationKind() == TSK_ImplicitInstantiation) {
1339         if (D->isThisDeclarationADefinition())
1340           Out << ";";
1341         Out << "\n";
1342         Indent();
1343         Visit(I);
1344       }
1345   }
1346 }
1347 
1348 void DeclPrinter::VisitClassTemplateSpecializationDecl(
1349                                            ClassTemplateSpecializationDecl *D) {
1350   Out << "template<> ";
1351   VisitCXXRecordDecl(D);
1352 }
1353 
1354 void DeclPrinter::VisitClassTemplatePartialSpecializationDecl(
1355                                     ClassTemplatePartialSpecializationDecl *D) {
1356   printTemplateParameters(D->getTemplateParameters());
1357   VisitCXXRecordDecl(D);
1358 }
1359 
1360 //----------------------------------------------------------------------------
1361 // Objective-C declarations
1362 //----------------------------------------------------------------------------
1363 
1364 void DeclPrinter::PrintObjCMethodType(ASTContext &Ctx,
1365                                       Decl::ObjCDeclQualifier Quals,
1366                                       QualType T) {
1367   Out << '(';
1368   if (Quals & Decl::ObjCDeclQualifier::OBJC_TQ_In)
1369     Out << "in ";
1370   if (Quals & Decl::ObjCDeclQualifier::OBJC_TQ_Inout)
1371     Out << "inout ";
1372   if (Quals & Decl::ObjCDeclQualifier::OBJC_TQ_Out)
1373     Out << "out ";
1374   if (Quals & Decl::ObjCDeclQualifier::OBJC_TQ_Bycopy)
1375     Out << "bycopy ";
1376   if (Quals & Decl::ObjCDeclQualifier::OBJC_TQ_Byref)
1377     Out << "byref ";
1378   if (Quals & Decl::ObjCDeclQualifier::OBJC_TQ_Oneway)
1379     Out << "oneway ";
1380   if (Quals & Decl::ObjCDeclQualifier::OBJC_TQ_CSNullability) {
1381     if (auto nullability = AttributedType::stripOuterNullability(T))
1382       Out << getNullabilitySpelling(*nullability, true) << ' ';
1383   }
1384 
1385   Out << Ctx.getUnqualifiedObjCPointerType(T).getAsString(Policy);
1386   Out << ')';
1387 }
1388 
1389 void DeclPrinter::PrintObjCTypeParams(ObjCTypeParamList *Params) {
1390   Out << "<";
1391   unsigned First = true;
1392   for (auto *Param : *Params) {
1393     if (First) {
1394       First = false;
1395     } else {
1396       Out << ", ";
1397     }
1398 
1399     switch (Param->getVariance()) {
1400     case ObjCTypeParamVariance::Invariant:
1401       break;
1402 
1403     case ObjCTypeParamVariance::Covariant:
1404       Out << "__covariant ";
1405       break;
1406 
1407     case ObjCTypeParamVariance::Contravariant:
1408       Out << "__contravariant ";
1409       break;
1410     }
1411 
1412     Out << Param->getDeclName();
1413 
1414     if (Param->hasExplicitBound()) {
1415       Out << " : " << Param->getUnderlyingType().getAsString(Policy);
1416     }
1417   }
1418   Out << ">";
1419 }
1420 
1421 void DeclPrinter::VisitObjCMethodDecl(ObjCMethodDecl *OMD) {
1422   if (OMD->isInstanceMethod())
1423     Out << "- ";
1424   else
1425     Out << "+ ";
1426   if (!OMD->getReturnType().isNull()) {
1427     PrintObjCMethodType(OMD->getASTContext(), OMD->getObjCDeclQualifier(),
1428                         OMD->getReturnType());
1429   }
1430 
1431   std::string name = OMD->getSelector().getAsString();
1432   std::string::size_type pos, lastPos = 0;
1433   for (const auto *PI : OMD->parameters()) {
1434     // FIXME: selector is missing here!
1435     pos = name.find_first_of(':', lastPos);
1436     if (lastPos != 0)
1437       Out << " ";
1438     Out << name.substr(lastPos, pos - lastPos) << ':';
1439     PrintObjCMethodType(OMD->getASTContext(),
1440                         PI->getObjCDeclQualifier(),
1441                         PI->getType());
1442     Out << *PI;
1443     lastPos = pos + 1;
1444   }
1445 
1446   if (OMD->param_begin() == OMD->param_end())
1447     Out << name;
1448 
1449   if (OMD->isVariadic())
1450       Out << ", ...";
1451 
1452   prettyPrintAttributes(OMD);
1453 
1454   if (OMD->getBody() && !Policy.TerseOutput) {
1455     Out << ' ';
1456     OMD->getBody()->printPretty(Out, nullptr, Policy, Indentation, "\n",
1457                                 &Context);
1458   }
1459   else if (Policy.PolishForDeclaration)
1460     Out << ';';
1461 }
1462 
1463 void DeclPrinter::VisitObjCImplementationDecl(ObjCImplementationDecl *OID) {
1464   std::string I = OID->getNameAsString();
1465   ObjCInterfaceDecl *SID = OID->getSuperClass();
1466 
1467   bool eolnOut = false;
1468   if (SID)
1469     Out << "@implementation " << I << " : " << *SID;
1470   else
1471     Out << "@implementation " << I;
1472 
1473   if (OID->ivar_size() > 0) {
1474     Out << "{\n";
1475     eolnOut = true;
1476     Indentation += Policy.Indentation;
1477     for (const auto *I : OID->ivars()) {
1478       Indent() << I->getASTContext().getUnqualifiedObjCPointerType(I->getType()).
1479                     getAsString(Policy) << ' ' << *I << ";\n";
1480     }
1481     Indentation -= Policy.Indentation;
1482     Out << "}\n";
1483   }
1484   else if (SID || (OID->decls_begin() != OID->decls_end())) {
1485     Out << "\n";
1486     eolnOut = true;
1487   }
1488   VisitDeclContext(OID, false);
1489   if (!eolnOut)
1490     Out << "\n";
1491   Out << "@end";
1492 }
1493 
1494 void DeclPrinter::VisitObjCInterfaceDecl(ObjCInterfaceDecl *OID) {
1495   std::string I = OID->getNameAsString();
1496   ObjCInterfaceDecl *SID = OID->getSuperClass();
1497 
1498   if (!OID->isThisDeclarationADefinition()) {
1499     Out << "@class " << I;
1500 
1501     if (auto TypeParams = OID->getTypeParamListAsWritten()) {
1502       PrintObjCTypeParams(TypeParams);
1503     }
1504 
1505     Out << ";";
1506     return;
1507   }
1508   bool eolnOut = false;
1509   if (OID->hasAttrs()) {
1510     prettyPrintAttributes(OID);
1511     Out << "\n";
1512   }
1513 
1514   Out << "@interface " << I;
1515 
1516   if (auto TypeParams = OID->getTypeParamListAsWritten()) {
1517     PrintObjCTypeParams(TypeParams);
1518   }
1519 
1520   if (SID)
1521     Out << " : " << QualType(OID->getSuperClassType(), 0).getAsString(Policy);
1522 
1523   // Protocols?
1524   const ObjCList<ObjCProtocolDecl> &Protocols = OID->getReferencedProtocols();
1525   if (!Protocols.empty()) {
1526     for (ObjCList<ObjCProtocolDecl>::iterator I = Protocols.begin(),
1527          E = Protocols.end(); I != E; ++I)
1528       Out << (I == Protocols.begin() ? '<' : ',') << **I;
1529     Out << "> ";
1530   }
1531 
1532   if (OID->ivar_size() > 0) {
1533     Out << "{\n";
1534     eolnOut = true;
1535     Indentation += Policy.Indentation;
1536     for (const auto *I : OID->ivars()) {
1537       Indent() << I->getASTContext()
1538                       .getUnqualifiedObjCPointerType(I->getType())
1539                       .getAsString(Policy) << ' ' << *I << ";\n";
1540     }
1541     Indentation -= Policy.Indentation;
1542     Out << "}\n";
1543   }
1544   else if (SID || (OID->decls_begin() != OID->decls_end())) {
1545     Out << "\n";
1546     eolnOut = true;
1547   }
1548 
1549   VisitDeclContext(OID, false);
1550   if (!eolnOut)
1551     Out << "\n";
1552   Out << "@end";
1553   // FIXME: implement the rest...
1554 }
1555 
1556 void DeclPrinter::VisitObjCProtocolDecl(ObjCProtocolDecl *PID) {
1557   if (!PID->isThisDeclarationADefinition()) {
1558     Out << "@protocol " << *PID << ";\n";
1559     return;
1560   }
1561   // Protocols?
1562   const ObjCList<ObjCProtocolDecl> &Protocols = PID->getReferencedProtocols();
1563   if (!Protocols.empty()) {
1564     Out << "@protocol " << *PID;
1565     for (ObjCList<ObjCProtocolDecl>::iterator I = Protocols.begin(),
1566          E = Protocols.end(); I != E; ++I)
1567       Out << (I == Protocols.begin() ? '<' : ',') << **I;
1568     Out << ">\n";
1569   } else
1570     Out << "@protocol " << *PID << '\n';
1571   VisitDeclContext(PID, false);
1572   Out << "@end";
1573 }
1574 
1575 void DeclPrinter::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *PID) {
1576   Out << "@implementation ";
1577   if (const auto *CID = PID->getClassInterface())
1578     Out << *CID;
1579   else
1580     Out << "<<error-type>>";
1581   Out << '(' << *PID << ")\n";
1582 
1583   VisitDeclContext(PID, false);
1584   Out << "@end";
1585   // FIXME: implement the rest...
1586 }
1587 
1588 void DeclPrinter::VisitObjCCategoryDecl(ObjCCategoryDecl *PID) {
1589   Out << "@interface ";
1590   if (const auto *CID = PID->getClassInterface())
1591     Out << *CID;
1592   else
1593     Out << "<<error-type>>";
1594   if (auto TypeParams = PID->getTypeParamList()) {
1595     PrintObjCTypeParams(TypeParams);
1596   }
1597   Out << "(" << *PID << ")\n";
1598   if (PID->ivar_size() > 0) {
1599     Out << "{\n";
1600     Indentation += Policy.Indentation;
1601     for (const auto *I : PID->ivars())
1602       Indent() << I->getASTContext().getUnqualifiedObjCPointerType(I->getType()).
1603                     getAsString(Policy) << ' ' << *I << ";\n";
1604     Indentation -= Policy.Indentation;
1605     Out << "}\n";
1606   }
1607 
1608   VisitDeclContext(PID, false);
1609   Out << "@end";
1610 
1611   // FIXME: implement the rest...
1612 }
1613 
1614 void DeclPrinter::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *AID) {
1615   Out << "@compatibility_alias " << *AID
1616       << ' ' << *AID->getClassInterface() << ";\n";
1617 }
1618 
1619 /// PrintObjCPropertyDecl - print a property declaration.
1620 ///
1621 /// Print attributes in the following order:
1622 /// - class
1623 /// - nonatomic | atomic
1624 /// - assign | retain | strong | copy | weak | unsafe_unretained
1625 /// - readwrite | readonly
1626 /// - getter & setter
1627 /// - nullability
1628 void DeclPrinter::VisitObjCPropertyDecl(ObjCPropertyDecl *PDecl) {
1629   if (PDecl->getPropertyImplementation() == ObjCPropertyDecl::Required)
1630     Out << "@required\n";
1631   else if (PDecl->getPropertyImplementation() == ObjCPropertyDecl::Optional)
1632     Out << "@optional\n";
1633 
1634   QualType T = PDecl->getType();
1635 
1636   Out << "@property";
1637   if (PDecl->getPropertyAttributes() != ObjCPropertyAttribute::kind_noattr) {
1638     bool first = true;
1639     Out << "(";
1640     if (PDecl->getPropertyAttributes() & ObjCPropertyAttribute::kind_class) {
1641       Out << (first ? "" : ", ") << "class";
1642       first = false;
1643     }
1644 
1645     if (PDecl->getPropertyAttributes() & ObjCPropertyAttribute::kind_direct) {
1646       Out << (first ? "" : ", ") << "direct";
1647       first = false;
1648     }
1649 
1650     if (PDecl->getPropertyAttributes() &
1651         ObjCPropertyAttribute::kind_nonatomic) {
1652       Out << (first ? "" : ", ") << "nonatomic";
1653       first = false;
1654     }
1655     if (PDecl->getPropertyAttributes() & ObjCPropertyAttribute::kind_atomic) {
1656       Out << (first ? "" : ", ") << "atomic";
1657       first = false;
1658     }
1659 
1660     if (PDecl->getPropertyAttributes() & ObjCPropertyAttribute::kind_assign) {
1661       Out << (first ? "" : ", ") << "assign";
1662       first = false;
1663     }
1664     if (PDecl->getPropertyAttributes() & ObjCPropertyAttribute::kind_retain) {
1665       Out << (first ? "" : ", ") << "retain";
1666       first = false;
1667     }
1668 
1669     if (PDecl->getPropertyAttributes() & ObjCPropertyAttribute::kind_strong) {
1670       Out << (first ? "" : ", ") << "strong";
1671       first = false;
1672     }
1673     if (PDecl->getPropertyAttributes() & ObjCPropertyAttribute::kind_copy) {
1674       Out << (first ? "" : ", ") << "copy";
1675       first = false;
1676     }
1677     if (PDecl->getPropertyAttributes() & ObjCPropertyAttribute::kind_weak) {
1678       Out << (first ? "" : ", ") << "weak";
1679       first = false;
1680     }
1681     if (PDecl->getPropertyAttributes() &
1682         ObjCPropertyAttribute::kind_unsafe_unretained) {
1683       Out << (first ? "" : ", ") << "unsafe_unretained";
1684       first = false;
1685     }
1686 
1687     if (PDecl->getPropertyAttributes() &
1688         ObjCPropertyAttribute::kind_readwrite) {
1689       Out << (first ? "" : ", ") << "readwrite";
1690       first = false;
1691     }
1692     if (PDecl->getPropertyAttributes() & ObjCPropertyAttribute::kind_readonly) {
1693       Out << (first ? "" : ", ") << "readonly";
1694       first = false;
1695     }
1696 
1697     if (PDecl->getPropertyAttributes() & ObjCPropertyAttribute::kind_getter) {
1698       Out << (first ? "" : ", ") << "getter = ";
1699       PDecl->getGetterName().print(Out);
1700       first = false;
1701     }
1702     if (PDecl->getPropertyAttributes() & ObjCPropertyAttribute::kind_setter) {
1703       Out << (first ? "" : ", ") << "setter = ";
1704       PDecl->getSetterName().print(Out);
1705       first = false;
1706     }
1707 
1708     if (PDecl->getPropertyAttributes() &
1709         ObjCPropertyAttribute::kind_nullability) {
1710       if (auto nullability = AttributedType::stripOuterNullability(T)) {
1711         if (*nullability == NullabilityKind::Unspecified &&
1712             (PDecl->getPropertyAttributes() &
1713              ObjCPropertyAttribute::kind_null_resettable)) {
1714           Out << (first ? "" : ", ") << "null_resettable";
1715         } else {
1716           Out << (first ? "" : ", ")
1717               << getNullabilitySpelling(*nullability, true);
1718         }
1719         first = false;
1720       }
1721     }
1722 
1723     (void) first; // Silence dead store warning due to idiomatic code.
1724     Out << ")";
1725   }
1726   std::string TypeStr = PDecl->getASTContext().getUnqualifiedObjCPointerType(T).
1727       getAsString(Policy);
1728   Out << ' ' << TypeStr;
1729   if (!StringRef(TypeStr).ends_with("*"))
1730     Out << ' ';
1731   Out << *PDecl;
1732   if (Policy.PolishForDeclaration)
1733     Out << ';';
1734 }
1735 
1736 void DeclPrinter::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *PID) {
1737   if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize)
1738     Out << "@synthesize ";
1739   else
1740     Out << "@dynamic ";
1741   Out << *PID->getPropertyDecl();
1742   if (PID->getPropertyIvarDecl())
1743     Out << '=' << *PID->getPropertyIvarDecl();
1744 }
1745 
1746 void DeclPrinter::VisitUsingDecl(UsingDecl *D) {
1747   if (!D->isAccessDeclaration())
1748     Out << "using ";
1749   if (D->hasTypename())
1750     Out << "typename ";
1751   D->getQualifier()->print(Out, Policy);
1752 
1753   // Use the correct record name when the using declaration is used for
1754   // inheriting constructors.
1755   for (const auto *Shadow : D->shadows()) {
1756     if (const auto *ConstructorShadow =
1757             dyn_cast<ConstructorUsingShadowDecl>(Shadow)) {
1758       assert(Shadow->getDeclContext() == ConstructorShadow->getDeclContext());
1759       Out << *ConstructorShadow->getNominatedBaseClass();
1760       return;
1761     }
1762   }
1763   Out << *D;
1764 }
1765 
1766 void DeclPrinter::VisitUsingEnumDecl(UsingEnumDecl *D) {
1767   Out << "using enum " << D->getEnumDecl();
1768 }
1769 
1770 void
1771 DeclPrinter::VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D) {
1772   Out << "using typename ";
1773   D->getQualifier()->print(Out, Policy);
1774   Out << D->getDeclName();
1775 }
1776 
1777 void DeclPrinter::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
1778   if (!D->isAccessDeclaration())
1779     Out << "using ";
1780   D->getQualifier()->print(Out, Policy);
1781   Out << D->getDeclName();
1782 }
1783 
1784 void DeclPrinter::VisitUsingShadowDecl(UsingShadowDecl *D) {
1785   // ignore
1786 }
1787 
1788 void DeclPrinter::VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D) {
1789   Out << "#pragma omp threadprivate";
1790   if (!D->varlist_empty()) {
1791     for (OMPThreadPrivateDecl::varlist_iterator I = D->varlist_begin(),
1792                                                 E = D->varlist_end();
1793                                                 I != E; ++I) {
1794       Out << (I == D->varlist_begin() ? '(' : ',');
1795       NamedDecl *ND = cast<DeclRefExpr>(*I)->getDecl();
1796       ND->printQualifiedName(Out);
1797     }
1798     Out << ")";
1799   }
1800 }
1801 
1802 void DeclPrinter::VisitHLSLBufferDecl(HLSLBufferDecl *D) {
1803   if (D->isCBuffer())
1804     Out << "cbuffer ";
1805   else
1806     Out << "tbuffer ";
1807 
1808   Out << *D;
1809 
1810   prettyPrintAttributes(D);
1811 
1812   Out << " {\n";
1813   VisitDeclContext(D);
1814   Indent() << "}";
1815 }
1816 
1817 void DeclPrinter::VisitOMPAllocateDecl(OMPAllocateDecl *D) {
1818   Out << "#pragma omp allocate";
1819   if (!D->varlist_empty()) {
1820     for (OMPAllocateDecl::varlist_iterator I = D->varlist_begin(),
1821                                            E = D->varlist_end();
1822          I != E; ++I) {
1823       Out << (I == D->varlist_begin() ? '(' : ',');
1824       NamedDecl *ND = cast<DeclRefExpr>(*I)->getDecl();
1825       ND->printQualifiedName(Out);
1826     }
1827     Out << ")";
1828   }
1829   if (!D->clauselist_empty()) {
1830     OMPClausePrinter Printer(Out, Policy, Context.getLangOpts().OpenMP);
1831     for (OMPClause *C : D->clauselists()) {
1832       Out << " ";
1833       Printer.Visit(C);
1834     }
1835   }
1836 }
1837 
1838 void DeclPrinter::VisitOMPRequiresDecl(OMPRequiresDecl *D) {
1839   Out << "#pragma omp requires ";
1840   if (!D->clauselist_empty()) {
1841     OMPClausePrinter Printer(Out, Policy, Context.getLangOpts().OpenMP);
1842     for (auto I = D->clauselist_begin(), E = D->clauselist_end(); I != E; ++I)
1843       Printer.Visit(*I);
1844   }
1845 }
1846 
1847 void DeclPrinter::VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D) {
1848   if (!D->isInvalidDecl()) {
1849     Out << "#pragma omp declare reduction (";
1850     if (D->getDeclName().getNameKind() == DeclarationName::CXXOperatorName) {
1851       const char *OpName =
1852           getOperatorSpelling(D->getDeclName().getCXXOverloadedOperator());
1853       assert(OpName && "not an overloaded operator");
1854       Out << OpName;
1855     } else {
1856       assert(D->getDeclName().isIdentifier());
1857       D->printName(Out, Policy);
1858     }
1859     Out << " : ";
1860     D->getType().print(Out, Policy);
1861     Out << " : ";
1862     D->getCombiner()->printPretty(Out, nullptr, Policy, 0, "\n", &Context);
1863     Out << ")";
1864     if (auto *Init = D->getInitializer()) {
1865       Out << " initializer(";
1866       switch (D->getInitializerKind()) {
1867       case OMPDeclareReductionInitKind::Direct:
1868         Out << "omp_priv(";
1869         break;
1870       case OMPDeclareReductionInitKind::Copy:
1871         Out << "omp_priv = ";
1872         break;
1873       case OMPDeclareReductionInitKind::Call:
1874         break;
1875       }
1876       Init->printPretty(Out, nullptr, Policy, 0, "\n", &Context);
1877       if (D->getInitializerKind() == OMPDeclareReductionInitKind::Direct)
1878         Out << ")";
1879       Out << ")";
1880     }
1881   }
1882 }
1883 
1884 void DeclPrinter::VisitOMPDeclareMapperDecl(OMPDeclareMapperDecl *D) {
1885   if (!D->isInvalidDecl()) {
1886     Out << "#pragma omp declare mapper (";
1887     D->printName(Out, Policy);
1888     Out << " : ";
1889     D->getType().print(Out, Policy);
1890     Out << " ";
1891     Out << D->getVarName();
1892     Out << ")";
1893     if (!D->clauselist_empty()) {
1894       OMPClausePrinter Printer(Out, Policy, Context.getLangOpts().OpenMP);
1895       for (auto *C : D->clauselists()) {
1896         Out << " ";
1897         Printer.Visit(C);
1898       }
1899     }
1900   }
1901 }
1902 
1903 void DeclPrinter::VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D) {
1904   D->getInit()->printPretty(Out, nullptr, Policy, Indentation, "\n", &Context);
1905 }
1906 
1907 void DeclPrinter::VisitTemplateTypeParmDecl(const TemplateTypeParmDecl *TTP) {
1908   if (const TypeConstraint *TC = TTP->getTypeConstraint())
1909     TC->print(Out, Policy);
1910   else if (TTP->wasDeclaredWithTypename())
1911     Out << "typename";
1912   else
1913     Out << "class";
1914 
1915   if (TTP->isParameterPack())
1916     Out << " ...";
1917   else if (TTP->getDeclName())
1918     Out << ' ';
1919 
1920   if (TTP->getDeclName()) {
1921     if (Policy.CleanUglifiedParameters && TTP->getIdentifier())
1922       Out << TTP->getIdentifier()->deuglifiedName();
1923     else
1924       Out << TTP->getDeclName();
1925   }
1926 
1927   if (TTP->hasDefaultArgument()) {
1928     Out << " = ";
1929     TTP->getDefaultArgument().getArgument().print(Policy, Out,
1930                                                   /*IncludeType=*/false);
1931   }
1932 }
1933 
1934 void DeclPrinter::VisitNonTypeTemplateParmDecl(
1935     const NonTypeTemplateParmDecl *NTTP) {
1936   StringRef Name;
1937   if (IdentifierInfo *II = NTTP->getIdentifier())
1938     Name =
1939         Policy.CleanUglifiedParameters ? II->deuglifiedName() : II->getName();
1940   printDeclType(NTTP->getType(), Name, NTTP->isParameterPack());
1941 
1942   if (NTTP->hasDefaultArgument()) {
1943     Out << " = ";
1944     NTTP->getDefaultArgument().getArgument().print(Policy, Out,
1945                                                    /*IncludeType=*/false);
1946   }
1947 }
1948 
1949 void DeclPrinter::VisitOpenACCDeclareDecl(OpenACCDeclareDecl *D) {
1950   if (!D->isInvalidDecl()) {
1951     Out << "#pragma acc declare";
1952     if (!D->clauses().empty()) {
1953       Out << ' ';
1954       OpenACCClausePrinter Printer(Out, Policy);
1955       Printer.VisitClauseList(D->clauses());
1956     }
1957   }
1958 }
1959 void DeclPrinter::VisitOpenACCRoutineDecl(OpenACCRoutineDecl *D) {
1960   if (!D->isInvalidDecl()) {
1961     Out << "#pragma acc routine";
1962 
1963     Out << "(";
1964 
1965     // The referenced function was named here, but this makes us tolerant of
1966     // errors.
1967     if (D->getFunctionReference())
1968       D->getFunctionReference()->printPretty(Out, nullptr, Policy, Indentation,
1969                                              "\n", &Context);
1970     else
1971       Out << "<error>";
1972 
1973     Out << ")";
1974 
1975     if (!D->clauses().empty()) {
1976       Out << ' ';
1977       OpenACCClausePrinter Printer(Out, Policy);
1978       Printer.VisitClauseList(D->clauses());
1979     }
1980   }
1981 }
1982