1 //===- StmtPrinter.cpp - Printing implementation for Stmt ASTs ------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file implements the Stmt::dumpPretty/Stmt::printPretty methods, which
11 // pretty print the AST back out to C code.
12 //
13 //===----------------------------------------------------------------------===//
14 
15 #include "clang/AST/ASTContext.h"
16 #include "clang/AST/Attr.h"
17 #include "clang/AST/Decl.h"
18 #include "clang/AST/DeclBase.h"
19 #include "clang/AST/DeclCXX.h"
20 #include "clang/AST/DeclObjC.h"
21 #include "clang/AST/DeclOpenMP.h"
22 #include "clang/AST/DeclTemplate.h"
23 #include "clang/AST/Expr.h"
24 #include "clang/AST/ExprCXX.h"
25 #include "clang/AST/ExprObjC.h"
26 #include "clang/AST/ExprOpenMP.h"
27 #include "clang/AST/NestedNameSpecifier.h"
28 #include "clang/AST/OpenMPClause.h"
29 #include "clang/AST/PrettyPrinter.h"
30 #include "clang/AST/Stmt.h"
31 #include "clang/AST/StmtCXX.h"
32 #include "clang/AST/StmtObjC.h"
33 #include "clang/AST/StmtOpenMP.h"
34 #include "clang/AST/StmtVisitor.h"
35 #include "clang/AST/TemplateBase.h"
36 #include "clang/AST/Type.h"
37 #include "clang/Basic/CharInfo.h"
38 #include "clang/Basic/ExpressionTraits.h"
39 #include "clang/Basic/IdentifierTable.h"
40 #include "clang/Basic/LLVM.h"
41 #include "clang/Basic/Lambda.h"
42 #include "clang/Basic/OpenMPKinds.h"
43 #include "clang/Basic/OperatorKinds.h"
44 #include "clang/Basic/SourceLocation.h"
45 #include "clang/Basic/TypeTraits.h"
46 #include "clang/Lex/Lexer.h"
47 #include "llvm/ADT/ArrayRef.h"
48 #include "llvm/ADT/SmallString.h"
49 #include "llvm/ADT/SmallVector.h"
50 #include "llvm/ADT/StringRef.h"
51 #include "llvm/Support/Casting.h"
52 #include "llvm/Support/Compiler.h"
53 #include "llvm/Support/ErrorHandling.h"
54 #include "llvm/Support/Format.h"
55 #include "llvm/Support/raw_ostream.h"
56 #include <cassert>
57 #include <string>
58 
59 using namespace clang;
60 
61 //===----------------------------------------------------------------------===//
62 // StmtPrinter Visitor
63 //===----------------------------------------------------------------------===//
64 
65 namespace {
66 
67   class StmtPrinter : public StmtVisitor<StmtPrinter> {
68     raw_ostream &OS;
69     unsigned IndentLevel;
70     PrinterHelper* Helper;
71     PrintingPolicy Policy;
72     std::string NL;
73     const ASTContext *Context;
74 
75   public:
76     StmtPrinter(raw_ostream &os, PrinterHelper *helper,
77                 const PrintingPolicy &Policy, unsigned Indentation = 0,
78                 StringRef NL = "\n",
79                 const ASTContext *Context = nullptr)
80         : OS(os), IndentLevel(Indentation), Helper(helper), Policy(Policy),
81           NL(NL), Context(Context) {}
82 
83     void PrintStmt(Stmt *S) {
84       PrintStmt(S, Policy.Indentation);
85     }
86 
87     void PrintStmt(Stmt *S, int SubIndent) {
88       IndentLevel += SubIndent;
89       if (S && isa<Expr>(S)) {
90         // If this is an expr used in a stmt context, indent and newline it.
91         Indent();
92         Visit(S);
93         OS << ";" << NL;
94       } else if (S) {
95         Visit(S);
96       } else {
97         Indent() << "<<<NULL STATEMENT>>>" << NL;
98       }
99       IndentLevel -= SubIndent;
100     }
101 
102     void PrintInitStmt(Stmt *S, unsigned PrefixWidth) {
103       // FIXME: Cope better with odd prefix widths.
104       IndentLevel += (PrefixWidth + 1) / 2;
105       if (auto *DS = dyn_cast<DeclStmt>(S))
106         PrintRawDeclStmt(DS);
107       else
108         PrintExpr(cast<Expr>(S));
109       OS << "; ";
110       IndentLevel -= (PrefixWidth + 1) / 2;
111     }
112 
113     void PrintControlledStmt(Stmt *S) {
114       if (auto *CS = dyn_cast<CompoundStmt>(S)) {
115         OS << " ";
116         PrintRawCompoundStmt(CS);
117         OS << NL;
118       } else {
119         OS << NL;
120         PrintStmt(S);
121       }
122     }
123 
124     void PrintRawCompoundStmt(CompoundStmt *S);
125     void PrintRawDecl(Decl *D);
126     void PrintRawDeclStmt(const DeclStmt *S);
127     void PrintRawIfStmt(IfStmt *If);
128     void PrintRawCXXCatchStmt(CXXCatchStmt *Catch);
129     void PrintCallArgs(CallExpr *E);
130     void PrintRawSEHExceptHandler(SEHExceptStmt *S);
131     void PrintRawSEHFinallyStmt(SEHFinallyStmt *S);
132     void PrintOMPExecutableDirective(OMPExecutableDirective *S,
133                                      bool ForceNoStmt = false);
134 
135     void PrintExpr(Expr *E) {
136       if (E)
137         Visit(E);
138       else
139         OS << "<null expr>";
140     }
141 
142     raw_ostream &Indent(int Delta = 0) {
143       for (int i = 0, e = IndentLevel+Delta; i < e; ++i)
144         OS << "  ";
145       return OS;
146     }
147 
148     void Visit(Stmt* S) {
149       if (Helper && Helper->handledStmt(S,OS))
150           return;
151       else StmtVisitor<StmtPrinter>::Visit(S);
152     }
153 
154     void VisitStmt(Stmt *Node) LLVM_ATTRIBUTE_UNUSED {
155       Indent() << "<<unknown stmt type>>" << NL;
156     }
157 
158     void VisitExpr(Expr *Node) LLVM_ATTRIBUTE_UNUSED {
159       OS << "<<unknown expr type>>";
160     }
161 
162     void VisitCXXNamedCastExpr(CXXNamedCastExpr *Node);
163 
164 #define ABSTRACT_STMT(CLASS)
165 #define STMT(CLASS, PARENT) \
166     void Visit##CLASS(CLASS *Node);
167 #include "clang/AST/StmtNodes.inc"
168   };
169 
170 } // namespace
171 
172 //===----------------------------------------------------------------------===//
173 //  Stmt printing methods.
174 //===----------------------------------------------------------------------===//
175 
176 /// PrintRawCompoundStmt - Print a compound stmt without indenting the {, and
177 /// with no newline after the }.
178 void StmtPrinter::PrintRawCompoundStmt(CompoundStmt *Node) {
179   OS << "{" << NL;
180   for (auto *I : Node->body())
181     PrintStmt(I);
182 
183   Indent() << "}";
184 }
185 
186 void StmtPrinter::PrintRawDecl(Decl *D) {
187   D->print(OS, Policy, IndentLevel);
188 }
189 
190 void StmtPrinter::PrintRawDeclStmt(const DeclStmt *S) {
191   SmallVector<Decl *, 2> Decls(S->decls());
192   Decl::printGroup(Decls.data(), Decls.size(), OS, Policy, IndentLevel);
193 }
194 
195 void StmtPrinter::VisitNullStmt(NullStmt *Node) {
196   Indent() << ";" << NL;
197 }
198 
199 void StmtPrinter::VisitDeclStmt(DeclStmt *Node) {
200   Indent();
201   PrintRawDeclStmt(Node);
202   OS << ";" << NL;
203 }
204 
205 void StmtPrinter::VisitCompoundStmt(CompoundStmt *Node) {
206   Indent();
207   PrintRawCompoundStmt(Node);
208   OS << "" << NL;
209 }
210 
211 void StmtPrinter::VisitCaseStmt(CaseStmt *Node) {
212   Indent(-1) << "case ";
213   PrintExpr(Node->getLHS());
214   if (Node->getRHS()) {
215     OS << " ... ";
216     PrintExpr(Node->getRHS());
217   }
218   OS << ":" << NL;
219 
220   PrintStmt(Node->getSubStmt(), 0);
221 }
222 
223 void StmtPrinter::VisitDefaultStmt(DefaultStmt *Node) {
224   Indent(-1) << "default:" << NL;
225   PrintStmt(Node->getSubStmt(), 0);
226 }
227 
228 void StmtPrinter::VisitLabelStmt(LabelStmt *Node) {
229   Indent(-1) << Node->getName() << ":" << NL;
230   PrintStmt(Node->getSubStmt(), 0);
231 }
232 
233 void StmtPrinter::VisitAttributedStmt(AttributedStmt *Node) {
234   for (const auto *Attr : Node->getAttrs()) {
235     Attr->printPretty(OS, Policy);
236   }
237 
238   PrintStmt(Node->getSubStmt(), 0);
239 }
240 
241 void StmtPrinter::PrintRawIfStmt(IfStmt *If) {
242   OS << "if (";
243   if (If->getInit())
244     PrintInitStmt(If->getInit(), 4);
245   if (const DeclStmt *DS = If->getConditionVariableDeclStmt())
246     PrintRawDeclStmt(DS);
247   else
248     PrintExpr(If->getCond());
249   OS << ')';
250 
251   if (auto *CS = dyn_cast<CompoundStmt>(If->getThen())) {
252     OS << ' ';
253     PrintRawCompoundStmt(CS);
254     OS << (If->getElse() ? " " : NL);
255   } else {
256     OS << NL;
257     PrintStmt(If->getThen());
258     if (If->getElse()) Indent();
259   }
260 
261   if (Stmt *Else = If->getElse()) {
262     OS << "else";
263 
264     if (auto *CS = dyn_cast<CompoundStmt>(Else)) {
265       OS << ' ';
266       PrintRawCompoundStmt(CS);
267       OS << NL;
268     } else if (auto *ElseIf = dyn_cast<IfStmt>(Else)) {
269       OS << ' ';
270       PrintRawIfStmt(ElseIf);
271     } else {
272       OS << NL;
273       PrintStmt(If->getElse());
274     }
275   }
276 }
277 
278 void StmtPrinter::VisitIfStmt(IfStmt *If) {
279   Indent();
280   PrintRawIfStmt(If);
281 }
282 
283 void StmtPrinter::VisitSwitchStmt(SwitchStmt *Node) {
284   Indent() << "switch (";
285   if (Node->getInit())
286     PrintInitStmt(Node->getInit(), 8);
287   if (const DeclStmt *DS = Node->getConditionVariableDeclStmt())
288     PrintRawDeclStmt(DS);
289   else
290     PrintExpr(Node->getCond());
291   OS << ")";
292   PrintControlledStmt(Node->getBody());
293 }
294 
295 void StmtPrinter::VisitWhileStmt(WhileStmt *Node) {
296   Indent() << "while (";
297   if (const DeclStmt *DS = Node->getConditionVariableDeclStmt())
298     PrintRawDeclStmt(DS);
299   else
300     PrintExpr(Node->getCond());
301   OS << ")" << NL;
302   PrintStmt(Node->getBody());
303 }
304 
305 void StmtPrinter::VisitDoStmt(DoStmt *Node) {
306   Indent() << "do ";
307   if (auto *CS = dyn_cast<CompoundStmt>(Node->getBody())) {
308     PrintRawCompoundStmt(CS);
309     OS << " ";
310   } else {
311     OS << NL;
312     PrintStmt(Node->getBody());
313     Indent();
314   }
315 
316   OS << "while (";
317   PrintExpr(Node->getCond());
318   OS << ");" << NL;
319 }
320 
321 void StmtPrinter::VisitForStmt(ForStmt *Node) {
322   Indent() << "for (";
323   if (Node->getInit())
324     PrintInitStmt(Node->getInit(), 5);
325   else
326     OS << (Node->getCond() ? "; " : ";");
327   if (Node->getCond())
328     PrintExpr(Node->getCond());
329   OS << ";";
330   if (Node->getInc()) {
331     OS << " ";
332     PrintExpr(Node->getInc());
333   }
334   OS << ")";
335   PrintControlledStmt(Node->getBody());
336 }
337 
338 void StmtPrinter::VisitObjCForCollectionStmt(ObjCForCollectionStmt *Node) {
339   Indent() << "for (";
340   if (auto *DS = dyn_cast<DeclStmt>(Node->getElement()))
341     PrintRawDeclStmt(DS);
342   else
343     PrintExpr(cast<Expr>(Node->getElement()));
344   OS << " in ";
345   PrintExpr(Node->getCollection());
346   OS << ")";
347   PrintControlledStmt(Node->getBody());
348 }
349 
350 void StmtPrinter::VisitCXXForRangeStmt(CXXForRangeStmt *Node) {
351   Indent() << "for (";
352   if (Node->getInit())
353     PrintInitStmt(Node->getInit(), 5);
354   PrintingPolicy SubPolicy(Policy);
355   SubPolicy.SuppressInitializers = true;
356   Node->getLoopVariable()->print(OS, SubPolicy, IndentLevel);
357   OS << " : ";
358   PrintExpr(Node->getRangeInit());
359   OS << ")";
360   PrintControlledStmt(Node->getBody());
361 }
362 
363 void StmtPrinter::VisitMSDependentExistsStmt(MSDependentExistsStmt *Node) {
364   Indent();
365   if (Node->isIfExists())
366     OS << "__if_exists (";
367   else
368     OS << "__if_not_exists (";
369 
370   if (NestedNameSpecifier *Qualifier
371         = Node->getQualifierLoc().getNestedNameSpecifier())
372     Qualifier->print(OS, Policy);
373 
374   OS << Node->getNameInfo() << ") ";
375 
376   PrintRawCompoundStmt(Node->getSubStmt());
377 }
378 
379 void StmtPrinter::VisitGotoStmt(GotoStmt *Node) {
380   Indent() << "goto " << Node->getLabel()->getName() << ";";
381   if (Policy.IncludeNewlines) OS << NL;
382 }
383 
384 void StmtPrinter::VisitIndirectGotoStmt(IndirectGotoStmt *Node) {
385   Indent() << "goto *";
386   PrintExpr(Node->getTarget());
387   OS << ";";
388   if (Policy.IncludeNewlines) OS << NL;
389 }
390 
391 void StmtPrinter::VisitContinueStmt(ContinueStmt *Node) {
392   Indent() << "continue;";
393   if (Policy.IncludeNewlines) OS << NL;
394 }
395 
396 void StmtPrinter::VisitBreakStmt(BreakStmt *Node) {
397   Indent() << "break;";
398   if (Policy.IncludeNewlines) OS << NL;
399 }
400 
401 void StmtPrinter::VisitReturnStmt(ReturnStmt *Node) {
402   Indent() << "return";
403   if (Node->getRetValue()) {
404     OS << " ";
405     PrintExpr(Node->getRetValue());
406   }
407   OS << ";";
408   if (Policy.IncludeNewlines) OS << NL;
409 }
410 
411 void StmtPrinter::VisitGCCAsmStmt(GCCAsmStmt *Node) {
412   Indent() << "asm ";
413 
414   if (Node->isVolatile())
415     OS << "volatile ";
416 
417   OS << "(";
418   VisitStringLiteral(Node->getAsmString());
419 
420   // Outputs
421   if (Node->getNumOutputs() != 0 || Node->getNumInputs() != 0 ||
422       Node->getNumClobbers() != 0)
423     OS << " : ";
424 
425   for (unsigned i = 0, e = Node->getNumOutputs(); i != e; ++i) {
426     if (i != 0)
427       OS << ", ";
428 
429     if (!Node->getOutputName(i).empty()) {
430       OS << '[';
431       OS << Node->getOutputName(i);
432       OS << "] ";
433     }
434 
435     VisitStringLiteral(Node->getOutputConstraintLiteral(i));
436     OS << " (";
437     Visit(Node->getOutputExpr(i));
438     OS << ")";
439   }
440 
441   // Inputs
442   if (Node->getNumInputs() != 0 || Node->getNumClobbers() != 0)
443     OS << " : ";
444 
445   for (unsigned i = 0, e = Node->getNumInputs(); i != e; ++i) {
446     if (i != 0)
447       OS << ", ";
448 
449     if (!Node->getInputName(i).empty()) {
450       OS << '[';
451       OS << Node->getInputName(i);
452       OS << "] ";
453     }
454 
455     VisitStringLiteral(Node->getInputConstraintLiteral(i));
456     OS << " (";
457     Visit(Node->getInputExpr(i));
458     OS << ")";
459   }
460 
461   // Clobbers
462   if (Node->getNumClobbers() != 0)
463     OS << " : ";
464 
465   for (unsigned i = 0, e = Node->getNumClobbers(); i != e; ++i) {
466     if (i != 0)
467       OS << ", ";
468 
469     VisitStringLiteral(Node->getClobberStringLiteral(i));
470   }
471 
472   OS << ");";
473   if (Policy.IncludeNewlines) OS << NL;
474 }
475 
476 void StmtPrinter::VisitMSAsmStmt(MSAsmStmt *Node) {
477   // FIXME: Implement MS style inline asm statement printer.
478   Indent() << "__asm ";
479   if (Node->hasBraces())
480     OS << "{" << NL;
481   OS << Node->getAsmString() << NL;
482   if (Node->hasBraces())
483     Indent() << "}" << NL;
484 }
485 
486 void StmtPrinter::VisitCapturedStmt(CapturedStmt *Node) {
487   PrintStmt(Node->getCapturedDecl()->getBody());
488 }
489 
490 void StmtPrinter::VisitObjCAtTryStmt(ObjCAtTryStmt *Node) {
491   Indent() << "@try";
492   if (auto *TS = dyn_cast<CompoundStmt>(Node->getTryBody())) {
493     PrintRawCompoundStmt(TS);
494     OS << NL;
495   }
496 
497   for (unsigned I = 0, N = Node->getNumCatchStmts(); I != N; ++I) {
498     ObjCAtCatchStmt *catchStmt = Node->getCatchStmt(I);
499     Indent() << "@catch(";
500     if (catchStmt->getCatchParamDecl()) {
501       if (Decl *DS = catchStmt->getCatchParamDecl())
502         PrintRawDecl(DS);
503     }
504     OS << ")";
505     if (auto *CS = dyn_cast<CompoundStmt>(catchStmt->getCatchBody())) {
506       PrintRawCompoundStmt(CS);
507       OS << NL;
508     }
509   }
510 
511   if (auto *FS = static_cast<ObjCAtFinallyStmt *>(Node->getFinallyStmt())) {
512     Indent() << "@finally";
513     PrintRawCompoundStmt(dyn_cast<CompoundStmt>(FS->getFinallyBody()));
514     OS << NL;
515   }
516 }
517 
518 void StmtPrinter::VisitObjCAtFinallyStmt(ObjCAtFinallyStmt *Node) {
519 }
520 
521 void StmtPrinter::VisitObjCAtCatchStmt (ObjCAtCatchStmt *Node) {
522   Indent() << "@catch (...) { /* todo */ } " << NL;
523 }
524 
525 void StmtPrinter::VisitObjCAtThrowStmt(ObjCAtThrowStmt *Node) {
526   Indent() << "@throw";
527   if (Node->getThrowExpr()) {
528     OS << " ";
529     PrintExpr(Node->getThrowExpr());
530   }
531   OS << ";" << NL;
532 }
533 
534 void StmtPrinter::VisitObjCAvailabilityCheckExpr(
535     ObjCAvailabilityCheckExpr *Node) {
536   OS << "@available(...)";
537 }
538 
539 void StmtPrinter::VisitObjCAtSynchronizedStmt(ObjCAtSynchronizedStmt *Node) {
540   Indent() << "@synchronized (";
541   PrintExpr(Node->getSynchExpr());
542   OS << ")";
543   PrintRawCompoundStmt(Node->getSynchBody());
544   OS << NL;
545 }
546 
547 void StmtPrinter::VisitObjCAutoreleasePoolStmt(ObjCAutoreleasePoolStmt *Node) {
548   Indent() << "@autoreleasepool";
549   PrintRawCompoundStmt(dyn_cast<CompoundStmt>(Node->getSubStmt()));
550   OS << NL;
551 }
552 
553 void StmtPrinter::PrintRawCXXCatchStmt(CXXCatchStmt *Node) {
554   OS << "catch (";
555   if (Decl *ExDecl = Node->getExceptionDecl())
556     PrintRawDecl(ExDecl);
557   else
558     OS << "...";
559   OS << ") ";
560   PrintRawCompoundStmt(cast<CompoundStmt>(Node->getHandlerBlock()));
561 }
562 
563 void StmtPrinter::VisitCXXCatchStmt(CXXCatchStmt *Node) {
564   Indent();
565   PrintRawCXXCatchStmt(Node);
566   OS << NL;
567 }
568 
569 void StmtPrinter::VisitCXXTryStmt(CXXTryStmt *Node) {
570   Indent() << "try ";
571   PrintRawCompoundStmt(Node->getTryBlock());
572   for (unsigned i = 0, e = Node->getNumHandlers(); i < e; ++i) {
573     OS << " ";
574     PrintRawCXXCatchStmt(Node->getHandler(i));
575   }
576   OS << NL;
577 }
578 
579 void StmtPrinter::VisitSEHTryStmt(SEHTryStmt *Node) {
580   Indent() << (Node->getIsCXXTry() ? "try " : "__try ");
581   PrintRawCompoundStmt(Node->getTryBlock());
582   SEHExceptStmt *E = Node->getExceptHandler();
583   SEHFinallyStmt *F = Node->getFinallyHandler();
584   if(E)
585     PrintRawSEHExceptHandler(E);
586   else {
587     assert(F && "Must have a finally block...");
588     PrintRawSEHFinallyStmt(F);
589   }
590   OS << NL;
591 }
592 
593 void StmtPrinter::PrintRawSEHFinallyStmt(SEHFinallyStmt *Node) {
594   OS << "__finally ";
595   PrintRawCompoundStmt(Node->getBlock());
596   OS << NL;
597 }
598 
599 void StmtPrinter::PrintRawSEHExceptHandler(SEHExceptStmt *Node) {
600   OS << "__except (";
601   VisitExpr(Node->getFilterExpr());
602   OS << ")" << NL;
603   PrintRawCompoundStmt(Node->getBlock());
604   OS << NL;
605 }
606 
607 void StmtPrinter::VisitSEHExceptStmt(SEHExceptStmt *Node) {
608   Indent();
609   PrintRawSEHExceptHandler(Node);
610   OS << NL;
611 }
612 
613 void StmtPrinter::VisitSEHFinallyStmt(SEHFinallyStmt *Node) {
614   Indent();
615   PrintRawSEHFinallyStmt(Node);
616   OS << NL;
617 }
618 
619 void StmtPrinter::VisitSEHLeaveStmt(SEHLeaveStmt *Node) {
620   Indent() << "__leave;";
621   if (Policy.IncludeNewlines) OS << NL;
622 }
623 
624 //===----------------------------------------------------------------------===//
625 //  OpenMP directives printing methods
626 //===----------------------------------------------------------------------===//
627 
628 void StmtPrinter::PrintOMPExecutableDirective(OMPExecutableDirective *S,
629                                               bool ForceNoStmt) {
630   OMPClausePrinter Printer(OS, Policy);
631   ArrayRef<OMPClause *> Clauses = S->clauses();
632   for (auto *Clause : Clauses)
633     if (Clause && !Clause->isImplicit()) {
634       OS << ' ';
635       Printer.Visit(Clause);
636     }
637   OS << NL;
638   if (!ForceNoStmt && S->hasAssociatedStmt())
639     PrintStmt(S->getInnermostCapturedStmt()->getCapturedStmt());
640 }
641 
642 void StmtPrinter::VisitOMPParallelDirective(OMPParallelDirective *Node) {
643   Indent() << "#pragma omp parallel";
644   PrintOMPExecutableDirective(Node);
645 }
646 
647 void StmtPrinter::VisitOMPSimdDirective(OMPSimdDirective *Node) {
648   Indent() << "#pragma omp simd";
649   PrintOMPExecutableDirective(Node);
650 }
651 
652 void StmtPrinter::VisitOMPForDirective(OMPForDirective *Node) {
653   Indent() << "#pragma omp for";
654   PrintOMPExecutableDirective(Node);
655 }
656 
657 void StmtPrinter::VisitOMPForSimdDirective(OMPForSimdDirective *Node) {
658   Indent() << "#pragma omp for simd";
659   PrintOMPExecutableDirective(Node);
660 }
661 
662 void StmtPrinter::VisitOMPSectionsDirective(OMPSectionsDirective *Node) {
663   Indent() << "#pragma omp sections";
664   PrintOMPExecutableDirective(Node);
665 }
666 
667 void StmtPrinter::VisitOMPSectionDirective(OMPSectionDirective *Node) {
668   Indent() << "#pragma omp section";
669   PrintOMPExecutableDirective(Node);
670 }
671 
672 void StmtPrinter::VisitOMPSingleDirective(OMPSingleDirective *Node) {
673   Indent() << "#pragma omp single";
674   PrintOMPExecutableDirective(Node);
675 }
676 
677 void StmtPrinter::VisitOMPMasterDirective(OMPMasterDirective *Node) {
678   Indent() << "#pragma omp master";
679   PrintOMPExecutableDirective(Node);
680 }
681 
682 void StmtPrinter::VisitOMPCriticalDirective(OMPCriticalDirective *Node) {
683   Indent() << "#pragma omp critical";
684   if (Node->getDirectiveName().getName()) {
685     OS << " (";
686     Node->getDirectiveName().printName(OS);
687     OS << ")";
688   }
689   PrintOMPExecutableDirective(Node);
690 }
691 
692 void StmtPrinter::VisitOMPParallelForDirective(OMPParallelForDirective *Node) {
693   Indent() << "#pragma omp parallel for";
694   PrintOMPExecutableDirective(Node);
695 }
696 
697 void StmtPrinter::VisitOMPParallelForSimdDirective(
698     OMPParallelForSimdDirective *Node) {
699   Indent() << "#pragma omp parallel for simd";
700   PrintOMPExecutableDirective(Node);
701 }
702 
703 void StmtPrinter::VisitOMPParallelSectionsDirective(
704     OMPParallelSectionsDirective *Node) {
705   Indent() << "#pragma omp parallel sections";
706   PrintOMPExecutableDirective(Node);
707 }
708 
709 void StmtPrinter::VisitOMPTaskDirective(OMPTaskDirective *Node) {
710   Indent() << "#pragma omp task";
711   PrintOMPExecutableDirective(Node);
712 }
713 
714 void StmtPrinter::VisitOMPTaskyieldDirective(OMPTaskyieldDirective *Node) {
715   Indent() << "#pragma omp taskyield";
716   PrintOMPExecutableDirective(Node);
717 }
718 
719 void StmtPrinter::VisitOMPBarrierDirective(OMPBarrierDirective *Node) {
720   Indent() << "#pragma omp barrier";
721   PrintOMPExecutableDirective(Node);
722 }
723 
724 void StmtPrinter::VisitOMPTaskwaitDirective(OMPTaskwaitDirective *Node) {
725   Indent() << "#pragma omp taskwait";
726   PrintOMPExecutableDirective(Node);
727 }
728 
729 void StmtPrinter::VisitOMPTaskgroupDirective(OMPTaskgroupDirective *Node) {
730   Indent() << "#pragma omp taskgroup";
731   PrintOMPExecutableDirective(Node);
732 }
733 
734 void StmtPrinter::VisitOMPFlushDirective(OMPFlushDirective *Node) {
735   Indent() << "#pragma omp flush";
736   PrintOMPExecutableDirective(Node);
737 }
738 
739 void StmtPrinter::VisitOMPOrderedDirective(OMPOrderedDirective *Node) {
740   Indent() << "#pragma omp ordered";
741   PrintOMPExecutableDirective(Node, Node->hasClausesOfKind<OMPDependClause>());
742 }
743 
744 void StmtPrinter::VisitOMPAtomicDirective(OMPAtomicDirective *Node) {
745   Indent() << "#pragma omp atomic";
746   PrintOMPExecutableDirective(Node);
747 }
748 
749 void StmtPrinter::VisitOMPTargetDirective(OMPTargetDirective *Node) {
750   Indent() << "#pragma omp target";
751   PrintOMPExecutableDirective(Node);
752 }
753 
754 void StmtPrinter::VisitOMPTargetDataDirective(OMPTargetDataDirective *Node) {
755   Indent() << "#pragma omp target data";
756   PrintOMPExecutableDirective(Node);
757 }
758 
759 void StmtPrinter::VisitOMPTargetEnterDataDirective(
760     OMPTargetEnterDataDirective *Node) {
761   Indent() << "#pragma omp target enter data";
762   PrintOMPExecutableDirective(Node, /*ForceNoStmt=*/true);
763 }
764 
765 void StmtPrinter::VisitOMPTargetExitDataDirective(
766     OMPTargetExitDataDirective *Node) {
767   Indent() << "#pragma omp target exit data";
768   PrintOMPExecutableDirective(Node, /*ForceNoStmt=*/true);
769 }
770 
771 void StmtPrinter::VisitOMPTargetParallelDirective(
772     OMPTargetParallelDirective *Node) {
773   Indent() << "#pragma omp target parallel";
774   PrintOMPExecutableDirective(Node);
775 }
776 
777 void StmtPrinter::VisitOMPTargetParallelForDirective(
778     OMPTargetParallelForDirective *Node) {
779   Indent() << "#pragma omp target parallel for";
780   PrintOMPExecutableDirective(Node);
781 }
782 
783 void StmtPrinter::VisitOMPTeamsDirective(OMPTeamsDirective *Node) {
784   Indent() << "#pragma omp teams";
785   PrintOMPExecutableDirective(Node);
786 }
787 
788 void StmtPrinter::VisitOMPCancellationPointDirective(
789     OMPCancellationPointDirective *Node) {
790   Indent() << "#pragma omp cancellation point "
791            << getOpenMPDirectiveName(Node->getCancelRegion());
792   PrintOMPExecutableDirective(Node);
793 }
794 
795 void StmtPrinter::VisitOMPCancelDirective(OMPCancelDirective *Node) {
796   Indent() << "#pragma omp cancel "
797            << getOpenMPDirectiveName(Node->getCancelRegion());
798   PrintOMPExecutableDirective(Node);
799 }
800 
801 void StmtPrinter::VisitOMPTaskLoopDirective(OMPTaskLoopDirective *Node) {
802   Indent() << "#pragma omp taskloop";
803   PrintOMPExecutableDirective(Node);
804 }
805 
806 void StmtPrinter::VisitOMPTaskLoopSimdDirective(
807     OMPTaskLoopSimdDirective *Node) {
808   Indent() << "#pragma omp taskloop simd";
809   PrintOMPExecutableDirective(Node);
810 }
811 
812 void StmtPrinter::VisitOMPDistributeDirective(OMPDistributeDirective *Node) {
813   Indent() << "#pragma omp distribute";
814   PrintOMPExecutableDirective(Node);
815 }
816 
817 void StmtPrinter::VisitOMPTargetUpdateDirective(
818     OMPTargetUpdateDirective *Node) {
819   Indent() << "#pragma omp target update";
820   PrintOMPExecutableDirective(Node, /*ForceNoStmt=*/true);
821 }
822 
823 void StmtPrinter::VisitOMPDistributeParallelForDirective(
824     OMPDistributeParallelForDirective *Node) {
825   Indent() << "#pragma omp distribute parallel for";
826   PrintOMPExecutableDirective(Node);
827 }
828 
829 void StmtPrinter::VisitOMPDistributeParallelForSimdDirective(
830     OMPDistributeParallelForSimdDirective *Node) {
831   Indent() << "#pragma omp distribute parallel for simd";
832   PrintOMPExecutableDirective(Node);
833 }
834 
835 void StmtPrinter::VisitOMPDistributeSimdDirective(
836     OMPDistributeSimdDirective *Node) {
837   Indent() << "#pragma omp distribute simd";
838   PrintOMPExecutableDirective(Node);
839 }
840 
841 void StmtPrinter::VisitOMPTargetParallelForSimdDirective(
842     OMPTargetParallelForSimdDirective *Node) {
843   Indent() << "#pragma omp target parallel for simd";
844   PrintOMPExecutableDirective(Node);
845 }
846 
847 void StmtPrinter::VisitOMPTargetSimdDirective(OMPTargetSimdDirective *Node) {
848   Indent() << "#pragma omp target simd";
849   PrintOMPExecutableDirective(Node);
850 }
851 
852 void StmtPrinter::VisitOMPTeamsDistributeDirective(
853     OMPTeamsDistributeDirective *Node) {
854   Indent() << "#pragma omp teams distribute";
855   PrintOMPExecutableDirective(Node);
856 }
857 
858 void StmtPrinter::VisitOMPTeamsDistributeSimdDirective(
859     OMPTeamsDistributeSimdDirective *Node) {
860   Indent() << "#pragma omp teams distribute simd";
861   PrintOMPExecutableDirective(Node);
862 }
863 
864 void StmtPrinter::VisitOMPTeamsDistributeParallelForSimdDirective(
865     OMPTeamsDistributeParallelForSimdDirective *Node) {
866   Indent() << "#pragma omp teams distribute parallel for simd";
867   PrintOMPExecutableDirective(Node);
868 }
869 
870 void StmtPrinter::VisitOMPTeamsDistributeParallelForDirective(
871     OMPTeamsDistributeParallelForDirective *Node) {
872   Indent() << "#pragma omp teams distribute parallel for";
873   PrintOMPExecutableDirective(Node);
874 }
875 
876 void StmtPrinter::VisitOMPTargetTeamsDirective(OMPTargetTeamsDirective *Node) {
877   Indent() << "#pragma omp target teams";
878   PrintOMPExecutableDirective(Node);
879 }
880 
881 void StmtPrinter::VisitOMPTargetTeamsDistributeDirective(
882     OMPTargetTeamsDistributeDirective *Node) {
883   Indent() << "#pragma omp target teams distribute";
884   PrintOMPExecutableDirective(Node);
885 }
886 
887 void StmtPrinter::VisitOMPTargetTeamsDistributeParallelForDirective(
888     OMPTargetTeamsDistributeParallelForDirective *Node) {
889   Indent() << "#pragma omp target teams distribute parallel for";
890   PrintOMPExecutableDirective(Node);
891 }
892 
893 void StmtPrinter::VisitOMPTargetTeamsDistributeParallelForSimdDirective(
894     OMPTargetTeamsDistributeParallelForSimdDirective *Node) {
895   Indent() << "#pragma omp target teams distribute parallel for simd";
896   PrintOMPExecutableDirective(Node);
897 }
898 
899 void StmtPrinter::VisitOMPTargetTeamsDistributeSimdDirective(
900     OMPTargetTeamsDistributeSimdDirective *Node) {
901   Indent() << "#pragma omp target teams distribute simd";
902   PrintOMPExecutableDirective(Node);
903 }
904 
905 //===----------------------------------------------------------------------===//
906 //  Expr printing methods.
907 //===----------------------------------------------------------------------===//
908 
909 void StmtPrinter::VisitConstantExpr(ConstantExpr *Node) {
910   PrintExpr(Node->getSubExpr());
911 }
912 
913 void StmtPrinter::VisitDeclRefExpr(DeclRefExpr *Node) {
914   if (const auto *OCED = dyn_cast<OMPCapturedExprDecl>(Node->getDecl())) {
915     OCED->getInit()->IgnoreImpCasts()->printPretty(OS, nullptr, Policy);
916     return;
917   }
918   if (NestedNameSpecifier *Qualifier = Node->getQualifier())
919     Qualifier->print(OS, Policy);
920   if (Node->hasTemplateKeyword())
921     OS << "template ";
922   OS << Node->getNameInfo();
923   if (Node->hasExplicitTemplateArgs())
924     printTemplateArgumentList(OS, Node->template_arguments(), Policy);
925 }
926 
927 void StmtPrinter::VisitDependentScopeDeclRefExpr(
928                                            DependentScopeDeclRefExpr *Node) {
929   if (NestedNameSpecifier *Qualifier = Node->getQualifier())
930     Qualifier->print(OS, Policy);
931   if (Node->hasTemplateKeyword())
932     OS << "template ";
933   OS << Node->getNameInfo();
934   if (Node->hasExplicitTemplateArgs())
935     printTemplateArgumentList(OS, Node->template_arguments(), Policy);
936 }
937 
938 void StmtPrinter::VisitUnresolvedLookupExpr(UnresolvedLookupExpr *Node) {
939   if (Node->getQualifier())
940     Node->getQualifier()->print(OS, Policy);
941   if (Node->hasTemplateKeyword())
942     OS << "template ";
943   OS << Node->getNameInfo();
944   if (Node->hasExplicitTemplateArgs())
945     printTemplateArgumentList(OS, Node->template_arguments(), Policy);
946 }
947 
948 static bool isImplicitSelf(const Expr *E) {
949   if (const auto *DRE = dyn_cast<DeclRefExpr>(E)) {
950     if (const auto *PD = dyn_cast<ImplicitParamDecl>(DRE->getDecl())) {
951       if (PD->getParameterKind() == ImplicitParamDecl::ObjCSelf &&
952           DRE->getBeginLoc().isInvalid())
953         return true;
954     }
955   }
956   return false;
957 }
958 
959 void StmtPrinter::VisitObjCIvarRefExpr(ObjCIvarRefExpr *Node) {
960   if (Node->getBase()) {
961     if (!Policy.SuppressImplicitBase ||
962         !isImplicitSelf(Node->getBase()->IgnoreImpCasts())) {
963       PrintExpr(Node->getBase());
964       OS << (Node->isArrow() ? "->" : ".");
965     }
966   }
967   OS << *Node->getDecl();
968 }
969 
970 void StmtPrinter::VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *Node) {
971   if (Node->isSuperReceiver())
972     OS << "super.";
973   else if (Node->isObjectReceiver() && Node->getBase()) {
974     PrintExpr(Node->getBase());
975     OS << ".";
976   } else if (Node->isClassReceiver() && Node->getClassReceiver()) {
977     OS << Node->getClassReceiver()->getName() << ".";
978   }
979 
980   if (Node->isImplicitProperty()) {
981     if (const auto *Getter = Node->getImplicitPropertyGetter())
982       Getter->getSelector().print(OS);
983     else
984       OS << SelectorTable::getPropertyNameFromSetterSelector(
985           Node->getImplicitPropertySetter()->getSelector());
986   } else
987     OS << Node->getExplicitProperty()->getName();
988 }
989 
990 void StmtPrinter::VisitObjCSubscriptRefExpr(ObjCSubscriptRefExpr *Node) {
991   PrintExpr(Node->getBaseExpr());
992   OS << "[";
993   PrintExpr(Node->getKeyExpr());
994   OS << "]";
995 }
996 
997 void StmtPrinter::VisitPredefinedExpr(PredefinedExpr *Node) {
998   OS << PredefinedExpr::getIdentKindName(Node->getIdentKind());
999 }
1000 
1001 void StmtPrinter::VisitCharacterLiteral(CharacterLiteral *Node) {
1002   unsigned value = Node->getValue();
1003 
1004   switch (Node->getKind()) {
1005   case CharacterLiteral::Ascii: break; // no prefix.
1006   case CharacterLiteral::Wide:  OS << 'L'; break;
1007   case CharacterLiteral::UTF8:  OS << "u8"; break;
1008   case CharacterLiteral::UTF16: OS << 'u'; break;
1009   case CharacterLiteral::UTF32: OS << 'U'; break;
1010   }
1011 
1012   switch (value) {
1013   case '\\':
1014     OS << "'\\\\'";
1015     break;
1016   case '\'':
1017     OS << "'\\''";
1018     break;
1019   case '\a':
1020     // TODO: K&R: the meaning of '\\a' is different in traditional C
1021     OS << "'\\a'";
1022     break;
1023   case '\b':
1024     OS << "'\\b'";
1025     break;
1026   // Nonstandard escape sequence.
1027   /*case '\e':
1028     OS << "'\\e'";
1029     break;*/
1030   case '\f':
1031     OS << "'\\f'";
1032     break;
1033   case '\n':
1034     OS << "'\\n'";
1035     break;
1036   case '\r':
1037     OS << "'\\r'";
1038     break;
1039   case '\t':
1040     OS << "'\\t'";
1041     break;
1042   case '\v':
1043     OS << "'\\v'";
1044     break;
1045   default:
1046     // A character literal might be sign-extended, which
1047     // would result in an invalid \U escape sequence.
1048     // FIXME: multicharacter literals such as '\xFF\xFF\xFF\xFF'
1049     // are not correctly handled.
1050     if ((value & ~0xFFu) == ~0xFFu && Node->getKind() == CharacterLiteral::Ascii)
1051       value &= 0xFFu;
1052     if (value < 256 && isPrintable((unsigned char)value))
1053       OS << "'" << (char)value << "'";
1054     else if (value < 256)
1055       OS << "'\\x" << llvm::format("%02x", value) << "'";
1056     else if (value <= 0xFFFF)
1057       OS << "'\\u" << llvm::format("%04x", value) << "'";
1058     else
1059       OS << "'\\U" << llvm::format("%08x", value) << "'";
1060   }
1061 }
1062 
1063 /// Prints the given expression using the original source text. Returns true on
1064 /// success, false otherwise.
1065 static bool printExprAsWritten(raw_ostream &OS, Expr *E,
1066                                const ASTContext *Context) {
1067   if (!Context)
1068     return false;
1069   bool Invalid = false;
1070   StringRef Source = Lexer::getSourceText(
1071       CharSourceRange::getTokenRange(E->getSourceRange()),
1072       Context->getSourceManager(), Context->getLangOpts(), &Invalid);
1073   if (!Invalid) {
1074     OS << Source;
1075     return true;
1076   }
1077   return false;
1078 }
1079 
1080 void StmtPrinter::VisitIntegerLiteral(IntegerLiteral *Node) {
1081   if (Policy.ConstantsAsWritten && printExprAsWritten(OS, Node, Context))
1082     return;
1083   bool isSigned = Node->getType()->isSignedIntegerType();
1084   OS << Node->getValue().toString(10, isSigned);
1085 
1086   // Emit suffixes.  Integer literals are always a builtin integer type.
1087   switch (Node->getType()->getAs<BuiltinType>()->getKind()) {
1088   default: llvm_unreachable("Unexpected type for integer literal!");
1089   case BuiltinType::Char_S:
1090   case BuiltinType::Char_U:    OS << "i8"; break;
1091   case BuiltinType::UChar:     OS << "Ui8"; break;
1092   case BuiltinType::Short:     OS << "i16"; break;
1093   case BuiltinType::UShort:    OS << "Ui16"; break;
1094   case BuiltinType::Int:       break; // no suffix.
1095   case BuiltinType::UInt:      OS << 'U'; break;
1096   case BuiltinType::Long:      OS << 'L'; break;
1097   case BuiltinType::ULong:     OS << "UL"; break;
1098   case BuiltinType::LongLong:  OS << "LL"; break;
1099   case BuiltinType::ULongLong: OS << "ULL"; break;
1100   }
1101 }
1102 
1103 void StmtPrinter::VisitFixedPointLiteral(FixedPointLiteral *Node) {
1104   if (Policy.ConstantsAsWritten && printExprAsWritten(OS, Node, Context))
1105     return;
1106   OS << Node->getValueAsString(/*Radix=*/10);
1107 
1108   switch (Node->getType()->getAs<BuiltinType>()->getKind()) {
1109     default: llvm_unreachable("Unexpected type for fixed point literal!");
1110     case BuiltinType::ShortFract:   OS << "hr"; break;
1111     case BuiltinType::ShortAccum:   OS << "hk"; break;
1112     case BuiltinType::UShortFract:  OS << "uhr"; break;
1113     case BuiltinType::UShortAccum:  OS << "uhk"; break;
1114     case BuiltinType::Fract:        OS << "r"; break;
1115     case BuiltinType::Accum:        OS << "k"; break;
1116     case BuiltinType::UFract:       OS << "ur"; break;
1117     case BuiltinType::UAccum:       OS << "uk"; break;
1118     case BuiltinType::LongFract:    OS << "lr"; break;
1119     case BuiltinType::LongAccum:    OS << "lk"; break;
1120     case BuiltinType::ULongFract:   OS << "ulr"; break;
1121     case BuiltinType::ULongAccum:   OS << "ulk"; break;
1122   }
1123 }
1124 
1125 static void PrintFloatingLiteral(raw_ostream &OS, FloatingLiteral *Node,
1126                                  bool PrintSuffix) {
1127   SmallString<16> Str;
1128   Node->getValue().toString(Str);
1129   OS << Str;
1130   if (Str.find_first_not_of("-0123456789") == StringRef::npos)
1131     OS << '.'; // Trailing dot in order to separate from ints.
1132 
1133   if (!PrintSuffix)
1134     return;
1135 
1136   // Emit suffixes.  Float literals are always a builtin float type.
1137   switch (Node->getType()->getAs<BuiltinType>()->getKind()) {
1138   default: llvm_unreachable("Unexpected type for float literal!");
1139   case BuiltinType::Half:       break; // FIXME: suffix?
1140   case BuiltinType::Double:     break; // no suffix.
1141   case BuiltinType::Float16:    OS << "F16"; break;
1142   case BuiltinType::Float:      OS << 'F'; break;
1143   case BuiltinType::LongDouble: OS << 'L'; break;
1144   case BuiltinType::Float128:   OS << 'Q'; break;
1145   }
1146 }
1147 
1148 void StmtPrinter::VisitFloatingLiteral(FloatingLiteral *Node) {
1149   if (Policy.ConstantsAsWritten && printExprAsWritten(OS, Node, Context))
1150     return;
1151   PrintFloatingLiteral(OS, Node, /*PrintSuffix=*/true);
1152 }
1153 
1154 void StmtPrinter::VisitImaginaryLiteral(ImaginaryLiteral *Node) {
1155   PrintExpr(Node->getSubExpr());
1156   OS << "i";
1157 }
1158 
1159 void StmtPrinter::VisitStringLiteral(StringLiteral *Str) {
1160   Str->outputString(OS);
1161 }
1162 
1163 void StmtPrinter::VisitParenExpr(ParenExpr *Node) {
1164   OS << "(";
1165   PrintExpr(Node->getSubExpr());
1166   OS << ")";
1167 }
1168 
1169 void StmtPrinter::VisitUnaryOperator(UnaryOperator *Node) {
1170   if (!Node->isPostfix()) {
1171     OS << UnaryOperator::getOpcodeStr(Node->getOpcode());
1172 
1173     // Print a space if this is an "identifier operator" like __real, or if
1174     // it might be concatenated incorrectly like '+'.
1175     switch (Node->getOpcode()) {
1176     default: break;
1177     case UO_Real:
1178     case UO_Imag:
1179     case UO_Extension:
1180       OS << ' ';
1181       break;
1182     case UO_Plus:
1183     case UO_Minus:
1184       if (isa<UnaryOperator>(Node->getSubExpr()))
1185         OS << ' ';
1186       break;
1187     }
1188   }
1189   PrintExpr(Node->getSubExpr());
1190 
1191   if (Node->isPostfix())
1192     OS << UnaryOperator::getOpcodeStr(Node->getOpcode());
1193 }
1194 
1195 void StmtPrinter::VisitOffsetOfExpr(OffsetOfExpr *Node) {
1196   OS << "__builtin_offsetof(";
1197   Node->getTypeSourceInfo()->getType().print(OS, Policy);
1198   OS << ", ";
1199   bool PrintedSomething = false;
1200   for (unsigned i = 0, n = Node->getNumComponents(); i < n; ++i) {
1201     OffsetOfNode ON = Node->getComponent(i);
1202     if (ON.getKind() == OffsetOfNode::Array) {
1203       // Array node
1204       OS << "[";
1205       PrintExpr(Node->getIndexExpr(ON.getArrayExprIndex()));
1206       OS << "]";
1207       PrintedSomething = true;
1208       continue;
1209     }
1210 
1211     // Skip implicit base indirections.
1212     if (ON.getKind() == OffsetOfNode::Base)
1213       continue;
1214 
1215     // Field or identifier node.
1216     IdentifierInfo *Id = ON.getFieldName();
1217     if (!Id)
1218       continue;
1219 
1220     if (PrintedSomething)
1221       OS << ".";
1222     else
1223       PrintedSomething = true;
1224     OS << Id->getName();
1225   }
1226   OS << ")";
1227 }
1228 
1229 void StmtPrinter::VisitUnaryExprOrTypeTraitExpr(UnaryExprOrTypeTraitExpr *Node){
1230   switch(Node->getKind()) {
1231   case UETT_SizeOf:
1232     OS << "sizeof";
1233     break;
1234   case UETT_AlignOf:
1235     if (Policy.Alignof)
1236       OS << "alignof";
1237     else if (Policy.UnderscoreAlignof)
1238       OS << "_Alignof";
1239     else
1240       OS << "__alignof";
1241     break;
1242   case UETT_PreferredAlignOf:
1243     OS << "__alignof";
1244     break;
1245   case UETT_VecStep:
1246     OS << "vec_step";
1247     break;
1248   case UETT_OpenMPRequiredSimdAlign:
1249     OS << "__builtin_omp_required_simd_align";
1250     break;
1251   }
1252   if (Node->isArgumentType()) {
1253     OS << '(';
1254     Node->getArgumentType().print(OS, Policy);
1255     OS << ')';
1256   } else {
1257     OS << " ";
1258     PrintExpr(Node->getArgumentExpr());
1259   }
1260 }
1261 
1262 void StmtPrinter::VisitGenericSelectionExpr(GenericSelectionExpr *Node) {
1263   OS << "_Generic(";
1264   PrintExpr(Node->getControllingExpr());
1265   for (unsigned i = 0; i != Node->getNumAssocs(); ++i) {
1266     OS << ", ";
1267     QualType T = Node->getAssocType(i);
1268     if (T.isNull())
1269       OS << "default";
1270     else
1271       T.print(OS, Policy);
1272     OS << ": ";
1273     PrintExpr(Node->getAssocExpr(i));
1274   }
1275   OS << ")";
1276 }
1277 
1278 void StmtPrinter::VisitArraySubscriptExpr(ArraySubscriptExpr *Node) {
1279   PrintExpr(Node->getLHS());
1280   OS << "[";
1281   PrintExpr(Node->getRHS());
1282   OS << "]";
1283 }
1284 
1285 void StmtPrinter::VisitOMPArraySectionExpr(OMPArraySectionExpr *Node) {
1286   PrintExpr(Node->getBase());
1287   OS << "[";
1288   if (Node->getLowerBound())
1289     PrintExpr(Node->getLowerBound());
1290   if (Node->getColonLoc().isValid()) {
1291     OS << ":";
1292     if (Node->getLength())
1293       PrintExpr(Node->getLength());
1294   }
1295   OS << "]";
1296 }
1297 
1298 void StmtPrinter::PrintCallArgs(CallExpr *Call) {
1299   for (unsigned i = 0, e = Call->getNumArgs(); i != e; ++i) {
1300     if (isa<CXXDefaultArgExpr>(Call->getArg(i))) {
1301       // Don't print any defaulted arguments
1302       break;
1303     }
1304 
1305     if (i) OS << ", ";
1306     PrintExpr(Call->getArg(i));
1307   }
1308 }
1309 
1310 void StmtPrinter::VisitCallExpr(CallExpr *Call) {
1311   PrintExpr(Call->getCallee());
1312   OS << "(";
1313   PrintCallArgs(Call);
1314   OS << ")";
1315 }
1316 
1317 static bool isImplicitThis(const Expr *E) {
1318   if (const auto *TE = dyn_cast<CXXThisExpr>(E))
1319     return TE->isImplicit();
1320   return false;
1321 }
1322 
1323 void StmtPrinter::VisitMemberExpr(MemberExpr *Node) {
1324   if (!Policy.SuppressImplicitBase || !isImplicitThis(Node->getBase())) {
1325     PrintExpr(Node->getBase());
1326 
1327     auto *ParentMember = dyn_cast<MemberExpr>(Node->getBase());
1328     FieldDecl *ParentDecl =
1329         ParentMember ? dyn_cast<FieldDecl>(ParentMember->getMemberDecl())
1330                      : nullptr;
1331 
1332     if (!ParentDecl || !ParentDecl->isAnonymousStructOrUnion())
1333       OS << (Node->isArrow() ? "->" : ".");
1334   }
1335 
1336   if (auto *FD = dyn_cast<FieldDecl>(Node->getMemberDecl()))
1337     if (FD->isAnonymousStructOrUnion())
1338       return;
1339 
1340   if (NestedNameSpecifier *Qualifier = Node->getQualifier())
1341     Qualifier->print(OS, Policy);
1342   if (Node->hasTemplateKeyword())
1343     OS << "template ";
1344   OS << Node->getMemberNameInfo();
1345   if (Node->hasExplicitTemplateArgs())
1346     printTemplateArgumentList(OS, Node->template_arguments(), Policy);
1347 }
1348 
1349 void StmtPrinter::VisitObjCIsaExpr(ObjCIsaExpr *Node) {
1350   PrintExpr(Node->getBase());
1351   OS << (Node->isArrow() ? "->isa" : ".isa");
1352 }
1353 
1354 void StmtPrinter::VisitExtVectorElementExpr(ExtVectorElementExpr *Node) {
1355   PrintExpr(Node->getBase());
1356   OS << ".";
1357   OS << Node->getAccessor().getName();
1358 }
1359 
1360 void StmtPrinter::VisitCStyleCastExpr(CStyleCastExpr *Node) {
1361   OS << '(';
1362   Node->getTypeAsWritten().print(OS, Policy);
1363   OS << ')';
1364   PrintExpr(Node->getSubExpr());
1365 }
1366 
1367 void StmtPrinter::VisitCompoundLiteralExpr(CompoundLiteralExpr *Node) {
1368   OS << '(';
1369   Node->getType().print(OS, Policy);
1370   OS << ')';
1371   PrintExpr(Node->getInitializer());
1372 }
1373 
1374 void StmtPrinter::VisitImplicitCastExpr(ImplicitCastExpr *Node) {
1375   // No need to print anything, simply forward to the subexpression.
1376   PrintExpr(Node->getSubExpr());
1377 }
1378 
1379 void StmtPrinter::VisitBinaryOperator(BinaryOperator *Node) {
1380   PrintExpr(Node->getLHS());
1381   OS << " " << BinaryOperator::getOpcodeStr(Node->getOpcode()) << " ";
1382   PrintExpr(Node->getRHS());
1383 }
1384 
1385 void StmtPrinter::VisitCompoundAssignOperator(CompoundAssignOperator *Node) {
1386   PrintExpr(Node->getLHS());
1387   OS << " " << BinaryOperator::getOpcodeStr(Node->getOpcode()) << " ";
1388   PrintExpr(Node->getRHS());
1389 }
1390 
1391 void StmtPrinter::VisitConditionalOperator(ConditionalOperator *Node) {
1392   PrintExpr(Node->getCond());
1393   OS << " ? ";
1394   PrintExpr(Node->getLHS());
1395   OS << " : ";
1396   PrintExpr(Node->getRHS());
1397 }
1398 
1399 // GNU extensions.
1400 
1401 void
1402 StmtPrinter::VisitBinaryConditionalOperator(BinaryConditionalOperator *Node) {
1403   PrintExpr(Node->getCommon());
1404   OS << " ?: ";
1405   PrintExpr(Node->getFalseExpr());
1406 }
1407 
1408 void StmtPrinter::VisitAddrLabelExpr(AddrLabelExpr *Node) {
1409   OS << "&&" << Node->getLabel()->getName();
1410 }
1411 
1412 void StmtPrinter::VisitStmtExpr(StmtExpr *E) {
1413   OS << "(";
1414   PrintRawCompoundStmt(E->getSubStmt());
1415   OS << ")";
1416 }
1417 
1418 void StmtPrinter::VisitChooseExpr(ChooseExpr *Node) {
1419   OS << "__builtin_choose_expr(";
1420   PrintExpr(Node->getCond());
1421   OS << ", ";
1422   PrintExpr(Node->getLHS());
1423   OS << ", ";
1424   PrintExpr(Node->getRHS());
1425   OS << ")";
1426 }
1427 
1428 void StmtPrinter::VisitGNUNullExpr(GNUNullExpr *) {
1429   OS << "__null";
1430 }
1431 
1432 void StmtPrinter::VisitShuffleVectorExpr(ShuffleVectorExpr *Node) {
1433   OS << "__builtin_shufflevector(";
1434   for (unsigned i = 0, e = Node->getNumSubExprs(); i != e; ++i) {
1435     if (i) OS << ", ";
1436     PrintExpr(Node->getExpr(i));
1437   }
1438   OS << ")";
1439 }
1440 
1441 void StmtPrinter::VisitConvertVectorExpr(ConvertVectorExpr *Node) {
1442   OS << "__builtin_convertvector(";
1443   PrintExpr(Node->getSrcExpr());
1444   OS << ", ";
1445   Node->getType().print(OS, Policy);
1446   OS << ")";
1447 }
1448 
1449 void StmtPrinter::VisitInitListExpr(InitListExpr* Node) {
1450   if (Node->getSyntacticForm()) {
1451     Visit(Node->getSyntacticForm());
1452     return;
1453   }
1454 
1455   OS << "{";
1456   for (unsigned i = 0, e = Node->getNumInits(); i != e; ++i) {
1457     if (i) OS << ", ";
1458     if (Node->getInit(i))
1459       PrintExpr(Node->getInit(i));
1460     else
1461       OS << "{}";
1462   }
1463   OS << "}";
1464 }
1465 
1466 void StmtPrinter::VisitArrayInitLoopExpr(ArrayInitLoopExpr *Node) {
1467   // There's no way to express this expression in any of our supported
1468   // languages, so just emit something terse and (hopefully) clear.
1469   OS << "{";
1470   PrintExpr(Node->getSubExpr());
1471   OS << "}";
1472 }
1473 
1474 void StmtPrinter::VisitArrayInitIndexExpr(ArrayInitIndexExpr *Node) {
1475   OS << "*";
1476 }
1477 
1478 void StmtPrinter::VisitParenListExpr(ParenListExpr* Node) {
1479   OS << "(";
1480   for (unsigned i = 0, e = Node->getNumExprs(); i != e; ++i) {
1481     if (i) OS << ", ";
1482     PrintExpr(Node->getExpr(i));
1483   }
1484   OS << ")";
1485 }
1486 
1487 void StmtPrinter::VisitDesignatedInitExpr(DesignatedInitExpr *Node) {
1488   bool NeedsEquals = true;
1489   for (const DesignatedInitExpr::Designator &D : Node->designators()) {
1490     if (D.isFieldDesignator()) {
1491       if (D.getDotLoc().isInvalid()) {
1492         if (IdentifierInfo *II = D.getFieldName()) {
1493           OS << II->getName() << ":";
1494           NeedsEquals = false;
1495         }
1496       } else {
1497         OS << "." << D.getFieldName()->getName();
1498       }
1499     } else {
1500       OS << "[";
1501       if (D.isArrayDesignator()) {
1502         PrintExpr(Node->getArrayIndex(D));
1503       } else {
1504         PrintExpr(Node->getArrayRangeStart(D));
1505         OS << " ... ";
1506         PrintExpr(Node->getArrayRangeEnd(D));
1507       }
1508       OS << "]";
1509     }
1510   }
1511 
1512   if (NeedsEquals)
1513     OS << " = ";
1514   else
1515     OS << " ";
1516   PrintExpr(Node->getInit());
1517 }
1518 
1519 void StmtPrinter::VisitDesignatedInitUpdateExpr(
1520     DesignatedInitUpdateExpr *Node) {
1521   OS << "{";
1522   OS << "/*base*/";
1523   PrintExpr(Node->getBase());
1524   OS << ", ";
1525 
1526   OS << "/*updater*/";
1527   PrintExpr(Node->getUpdater());
1528   OS << "}";
1529 }
1530 
1531 void StmtPrinter::VisitNoInitExpr(NoInitExpr *Node) {
1532   OS << "/*no init*/";
1533 }
1534 
1535 void StmtPrinter::VisitImplicitValueInitExpr(ImplicitValueInitExpr *Node) {
1536   if (Node->getType()->getAsCXXRecordDecl()) {
1537     OS << "/*implicit*/";
1538     Node->getType().print(OS, Policy);
1539     OS << "()";
1540   } else {
1541     OS << "/*implicit*/(";
1542     Node->getType().print(OS, Policy);
1543     OS << ')';
1544     if (Node->getType()->isRecordType())
1545       OS << "{}";
1546     else
1547       OS << 0;
1548   }
1549 }
1550 
1551 void StmtPrinter::VisitVAArgExpr(VAArgExpr *Node) {
1552   OS << "__builtin_va_arg(";
1553   PrintExpr(Node->getSubExpr());
1554   OS << ", ";
1555   Node->getType().print(OS, Policy);
1556   OS << ")";
1557 }
1558 
1559 void StmtPrinter::VisitPseudoObjectExpr(PseudoObjectExpr *Node) {
1560   PrintExpr(Node->getSyntacticForm());
1561 }
1562 
1563 void StmtPrinter::VisitAtomicExpr(AtomicExpr *Node) {
1564   const char *Name = nullptr;
1565   switch (Node->getOp()) {
1566 #define BUILTIN(ID, TYPE, ATTRS)
1567 #define ATOMIC_BUILTIN(ID, TYPE, ATTRS) \
1568   case AtomicExpr::AO ## ID: \
1569     Name = #ID "("; \
1570     break;
1571 #include "clang/Basic/Builtins.def"
1572   }
1573   OS << Name;
1574 
1575   // AtomicExpr stores its subexpressions in a permuted order.
1576   PrintExpr(Node->getPtr());
1577   if (Node->getOp() != AtomicExpr::AO__c11_atomic_load &&
1578       Node->getOp() != AtomicExpr::AO__atomic_load_n &&
1579       Node->getOp() != AtomicExpr::AO__opencl_atomic_load) {
1580     OS << ", ";
1581     PrintExpr(Node->getVal1());
1582   }
1583   if (Node->getOp() == AtomicExpr::AO__atomic_exchange ||
1584       Node->isCmpXChg()) {
1585     OS << ", ";
1586     PrintExpr(Node->getVal2());
1587   }
1588   if (Node->getOp() == AtomicExpr::AO__atomic_compare_exchange ||
1589       Node->getOp() == AtomicExpr::AO__atomic_compare_exchange_n) {
1590     OS << ", ";
1591     PrintExpr(Node->getWeak());
1592   }
1593   if (Node->getOp() != AtomicExpr::AO__c11_atomic_init &&
1594       Node->getOp() != AtomicExpr::AO__opencl_atomic_init) {
1595     OS << ", ";
1596     PrintExpr(Node->getOrder());
1597   }
1598   if (Node->isCmpXChg()) {
1599     OS << ", ";
1600     PrintExpr(Node->getOrderFail());
1601   }
1602   OS << ")";
1603 }
1604 
1605 // C++
1606 void StmtPrinter::VisitCXXOperatorCallExpr(CXXOperatorCallExpr *Node) {
1607   const char *OpStrings[NUM_OVERLOADED_OPERATORS] = {
1608     "",
1609 #define OVERLOADED_OPERATOR(Name,Spelling,Token,Unary,Binary,MemberOnly) \
1610     Spelling,
1611 #include "clang/Basic/OperatorKinds.def"
1612   };
1613 
1614   OverloadedOperatorKind Kind = Node->getOperator();
1615   if (Kind == OO_PlusPlus || Kind == OO_MinusMinus) {
1616     if (Node->getNumArgs() == 1) {
1617       OS << OpStrings[Kind] << ' ';
1618       PrintExpr(Node->getArg(0));
1619     } else {
1620       PrintExpr(Node->getArg(0));
1621       OS << ' ' << OpStrings[Kind];
1622     }
1623   } else if (Kind == OO_Arrow) {
1624     PrintExpr(Node->getArg(0));
1625   } else if (Kind == OO_Call) {
1626     PrintExpr(Node->getArg(0));
1627     OS << '(';
1628     for (unsigned ArgIdx = 1; ArgIdx < Node->getNumArgs(); ++ArgIdx) {
1629       if (ArgIdx > 1)
1630         OS << ", ";
1631       if (!isa<CXXDefaultArgExpr>(Node->getArg(ArgIdx)))
1632         PrintExpr(Node->getArg(ArgIdx));
1633     }
1634     OS << ')';
1635   } else if (Kind == OO_Subscript) {
1636     PrintExpr(Node->getArg(0));
1637     OS << '[';
1638     PrintExpr(Node->getArg(1));
1639     OS << ']';
1640   } else if (Node->getNumArgs() == 1) {
1641     OS << OpStrings[Kind] << ' ';
1642     PrintExpr(Node->getArg(0));
1643   } else if (Node->getNumArgs() == 2) {
1644     PrintExpr(Node->getArg(0));
1645     OS << ' ' << OpStrings[Kind] << ' ';
1646     PrintExpr(Node->getArg(1));
1647   } else {
1648     llvm_unreachable("unknown overloaded operator");
1649   }
1650 }
1651 
1652 void StmtPrinter::VisitCXXMemberCallExpr(CXXMemberCallExpr *Node) {
1653   // If we have a conversion operator call only print the argument.
1654   CXXMethodDecl *MD = Node->getMethodDecl();
1655   if (MD && isa<CXXConversionDecl>(MD)) {
1656     PrintExpr(Node->getImplicitObjectArgument());
1657     return;
1658   }
1659   VisitCallExpr(cast<CallExpr>(Node));
1660 }
1661 
1662 void StmtPrinter::VisitCUDAKernelCallExpr(CUDAKernelCallExpr *Node) {
1663   PrintExpr(Node->getCallee());
1664   OS << "<<<";
1665   PrintCallArgs(Node->getConfig());
1666   OS << ">>>(";
1667   PrintCallArgs(Node);
1668   OS << ")";
1669 }
1670 
1671 void StmtPrinter::VisitCXXNamedCastExpr(CXXNamedCastExpr *Node) {
1672   OS << Node->getCastName() << '<';
1673   Node->getTypeAsWritten().print(OS, Policy);
1674   OS << ">(";
1675   PrintExpr(Node->getSubExpr());
1676   OS << ")";
1677 }
1678 
1679 void StmtPrinter::VisitCXXStaticCastExpr(CXXStaticCastExpr *Node) {
1680   VisitCXXNamedCastExpr(Node);
1681 }
1682 
1683 void StmtPrinter::VisitCXXDynamicCastExpr(CXXDynamicCastExpr *Node) {
1684   VisitCXXNamedCastExpr(Node);
1685 }
1686 
1687 void StmtPrinter::VisitCXXReinterpretCastExpr(CXXReinterpretCastExpr *Node) {
1688   VisitCXXNamedCastExpr(Node);
1689 }
1690 
1691 void StmtPrinter::VisitCXXConstCastExpr(CXXConstCastExpr *Node) {
1692   VisitCXXNamedCastExpr(Node);
1693 }
1694 
1695 void StmtPrinter::VisitCXXTypeidExpr(CXXTypeidExpr *Node) {
1696   OS << "typeid(";
1697   if (Node->isTypeOperand()) {
1698     Node->getTypeOperandSourceInfo()->getType().print(OS, Policy);
1699   } else {
1700     PrintExpr(Node->getExprOperand());
1701   }
1702   OS << ")";
1703 }
1704 
1705 void StmtPrinter::VisitCXXUuidofExpr(CXXUuidofExpr *Node) {
1706   OS << "__uuidof(";
1707   if (Node->isTypeOperand()) {
1708     Node->getTypeOperandSourceInfo()->getType().print(OS, Policy);
1709   } else {
1710     PrintExpr(Node->getExprOperand());
1711   }
1712   OS << ")";
1713 }
1714 
1715 void StmtPrinter::VisitMSPropertyRefExpr(MSPropertyRefExpr *Node) {
1716   PrintExpr(Node->getBaseExpr());
1717   if (Node->isArrow())
1718     OS << "->";
1719   else
1720     OS << ".";
1721   if (NestedNameSpecifier *Qualifier =
1722       Node->getQualifierLoc().getNestedNameSpecifier())
1723     Qualifier->print(OS, Policy);
1724   OS << Node->getPropertyDecl()->getDeclName();
1725 }
1726 
1727 void StmtPrinter::VisitMSPropertySubscriptExpr(MSPropertySubscriptExpr *Node) {
1728   PrintExpr(Node->getBase());
1729   OS << "[";
1730   PrintExpr(Node->getIdx());
1731   OS << "]";
1732 }
1733 
1734 void StmtPrinter::VisitUserDefinedLiteral(UserDefinedLiteral *Node) {
1735   switch (Node->getLiteralOperatorKind()) {
1736   case UserDefinedLiteral::LOK_Raw:
1737     OS << cast<StringLiteral>(Node->getArg(0)->IgnoreImpCasts())->getString();
1738     break;
1739   case UserDefinedLiteral::LOK_Template: {
1740     const auto *DRE = cast<DeclRefExpr>(Node->getCallee()->IgnoreImpCasts());
1741     const TemplateArgumentList *Args =
1742       cast<FunctionDecl>(DRE->getDecl())->getTemplateSpecializationArgs();
1743     assert(Args);
1744 
1745     if (Args->size() != 1) {
1746       OS << "operator\"\"" << Node->getUDSuffix()->getName();
1747       printTemplateArgumentList(OS, Args->asArray(), Policy);
1748       OS << "()";
1749       return;
1750     }
1751 
1752     const TemplateArgument &Pack = Args->get(0);
1753     for (const auto &P : Pack.pack_elements()) {
1754       char C = (char)P.getAsIntegral().getZExtValue();
1755       OS << C;
1756     }
1757     break;
1758   }
1759   case UserDefinedLiteral::LOK_Integer: {
1760     // Print integer literal without suffix.
1761     const auto *Int = cast<IntegerLiteral>(Node->getCookedLiteral());
1762     OS << Int->getValue().toString(10, /*isSigned*/false);
1763     break;
1764   }
1765   case UserDefinedLiteral::LOK_Floating: {
1766     // Print floating literal without suffix.
1767     auto *Float = cast<FloatingLiteral>(Node->getCookedLiteral());
1768     PrintFloatingLiteral(OS, Float, /*PrintSuffix=*/false);
1769     break;
1770   }
1771   case UserDefinedLiteral::LOK_String:
1772   case UserDefinedLiteral::LOK_Character:
1773     PrintExpr(Node->getCookedLiteral());
1774     break;
1775   }
1776   OS << Node->getUDSuffix()->getName();
1777 }
1778 
1779 void StmtPrinter::VisitCXXBoolLiteralExpr(CXXBoolLiteralExpr *Node) {
1780   OS << (Node->getValue() ? "true" : "false");
1781 }
1782 
1783 void StmtPrinter::VisitCXXNullPtrLiteralExpr(CXXNullPtrLiteralExpr *Node) {
1784   OS << "nullptr";
1785 }
1786 
1787 void StmtPrinter::VisitCXXThisExpr(CXXThisExpr *Node) {
1788   OS << "this";
1789 }
1790 
1791 void StmtPrinter::VisitCXXThrowExpr(CXXThrowExpr *Node) {
1792   if (!Node->getSubExpr())
1793     OS << "throw";
1794   else {
1795     OS << "throw ";
1796     PrintExpr(Node->getSubExpr());
1797   }
1798 }
1799 
1800 void StmtPrinter::VisitCXXDefaultArgExpr(CXXDefaultArgExpr *Node) {
1801   // Nothing to print: we picked up the default argument.
1802 }
1803 
1804 void StmtPrinter::VisitCXXDefaultInitExpr(CXXDefaultInitExpr *Node) {
1805   // Nothing to print: we picked up the default initializer.
1806 }
1807 
1808 void StmtPrinter::VisitCXXFunctionalCastExpr(CXXFunctionalCastExpr *Node) {
1809   Node->getType().print(OS, Policy);
1810   // If there are no parens, this is list-initialization, and the braces are
1811   // part of the syntax of the inner construct.
1812   if (Node->getLParenLoc().isValid())
1813     OS << "(";
1814   PrintExpr(Node->getSubExpr());
1815   if (Node->getLParenLoc().isValid())
1816     OS << ")";
1817 }
1818 
1819 void StmtPrinter::VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *Node) {
1820   PrintExpr(Node->getSubExpr());
1821 }
1822 
1823 void StmtPrinter::VisitCXXTemporaryObjectExpr(CXXTemporaryObjectExpr *Node) {
1824   Node->getType().print(OS, Policy);
1825   if (Node->isStdInitListInitialization())
1826     /* Nothing to do; braces are part of creating the std::initializer_list. */;
1827   else if (Node->isListInitialization())
1828     OS << "{";
1829   else
1830     OS << "(";
1831   for (CXXTemporaryObjectExpr::arg_iterator Arg = Node->arg_begin(),
1832                                          ArgEnd = Node->arg_end();
1833        Arg != ArgEnd; ++Arg) {
1834     if ((*Arg)->isDefaultArgument())
1835       break;
1836     if (Arg != Node->arg_begin())
1837       OS << ", ";
1838     PrintExpr(*Arg);
1839   }
1840   if (Node->isStdInitListInitialization())
1841     /* See above. */;
1842   else if (Node->isListInitialization())
1843     OS << "}";
1844   else
1845     OS << ")";
1846 }
1847 
1848 void StmtPrinter::VisitLambdaExpr(LambdaExpr *Node) {
1849   OS << '[';
1850   bool NeedComma = false;
1851   switch (Node->getCaptureDefault()) {
1852   case LCD_None:
1853     break;
1854 
1855   case LCD_ByCopy:
1856     OS << '=';
1857     NeedComma = true;
1858     break;
1859 
1860   case LCD_ByRef:
1861     OS << '&';
1862     NeedComma = true;
1863     break;
1864   }
1865   for (LambdaExpr::capture_iterator C = Node->explicit_capture_begin(),
1866                                  CEnd = Node->explicit_capture_end();
1867        C != CEnd;
1868        ++C) {
1869     if (C->capturesVLAType())
1870       continue;
1871 
1872     if (NeedComma)
1873       OS << ", ";
1874     NeedComma = true;
1875 
1876     switch (C->getCaptureKind()) {
1877     case LCK_This:
1878       OS << "this";
1879       break;
1880 
1881     case LCK_StarThis:
1882       OS << "*this";
1883       break;
1884 
1885     case LCK_ByRef:
1886       if (Node->getCaptureDefault() != LCD_ByRef || Node->isInitCapture(C))
1887         OS << '&';
1888       OS << C->getCapturedVar()->getName();
1889       break;
1890 
1891     case LCK_ByCopy:
1892       OS << C->getCapturedVar()->getName();
1893       break;
1894 
1895     case LCK_VLAType:
1896       llvm_unreachable("VLA type in explicit captures.");
1897     }
1898 
1899     if (Node->isInitCapture(C))
1900       PrintExpr(C->getCapturedVar()->getInit());
1901   }
1902   OS << ']';
1903 
1904   if (Node->hasExplicitParameters()) {
1905     OS << " (";
1906     CXXMethodDecl *Method = Node->getCallOperator();
1907     NeedComma = false;
1908     for (const auto *P : Method->parameters()) {
1909       if (NeedComma) {
1910         OS << ", ";
1911       } else {
1912         NeedComma = true;
1913       }
1914       std::string ParamStr = P->getNameAsString();
1915       P->getOriginalType().print(OS, Policy, ParamStr);
1916     }
1917     if (Method->isVariadic()) {
1918       if (NeedComma)
1919         OS << ", ";
1920       OS << "...";
1921     }
1922     OS << ')';
1923 
1924     if (Node->isMutable())
1925       OS << " mutable";
1926 
1927     auto *Proto = Method->getType()->getAs<FunctionProtoType>();
1928     Proto->printExceptionSpecification(OS, Policy);
1929 
1930     // FIXME: Attributes
1931 
1932     // Print the trailing return type if it was specified in the source.
1933     if (Node->hasExplicitResultType()) {
1934       OS << " -> ";
1935       Proto->getReturnType().print(OS, Policy);
1936     }
1937   }
1938 
1939   // Print the body.
1940   CompoundStmt *Body = Node->getBody();
1941   OS << ' ';
1942   PrintStmt(Body);
1943 }
1944 
1945 void StmtPrinter::VisitCXXScalarValueInitExpr(CXXScalarValueInitExpr *Node) {
1946   if (TypeSourceInfo *TSInfo = Node->getTypeSourceInfo())
1947     TSInfo->getType().print(OS, Policy);
1948   else
1949     Node->getType().print(OS, Policy);
1950   OS << "()";
1951 }
1952 
1953 void StmtPrinter::VisitCXXNewExpr(CXXNewExpr *E) {
1954   if (E->isGlobalNew())
1955     OS << "::";
1956   OS << "new ";
1957   unsigned NumPlace = E->getNumPlacementArgs();
1958   if (NumPlace > 0 && !isa<CXXDefaultArgExpr>(E->getPlacementArg(0))) {
1959     OS << "(";
1960     PrintExpr(E->getPlacementArg(0));
1961     for (unsigned i = 1; i < NumPlace; ++i) {
1962       if (isa<CXXDefaultArgExpr>(E->getPlacementArg(i)))
1963         break;
1964       OS << ", ";
1965       PrintExpr(E->getPlacementArg(i));
1966     }
1967     OS << ") ";
1968   }
1969   if (E->isParenTypeId())
1970     OS << "(";
1971   std::string TypeS;
1972   if (Expr *Size = E->getArraySize()) {
1973     llvm::raw_string_ostream s(TypeS);
1974     s << '[';
1975     Size->printPretty(s, Helper, Policy);
1976     s << ']';
1977   }
1978   E->getAllocatedType().print(OS, Policy, TypeS);
1979   if (E->isParenTypeId())
1980     OS << ")";
1981 
1982   CXXNewExpr::InitializationStyle InitStyle = E->getInitializationStyle();
1983   if (InitStyle) {
1984     if (InitStyle == CXXNewExpr::CallInit)
1985       OS << "(";
1986     PrintExpr(E->getInitializer());
1987     if (InitStyle == CXXNewExpr::CallInit)
1988       OS << ")";
1989   }
1990 }
1991 
1992 void StmtPrinter::VisitCXXDeleteExpr(CXXDeleteExpr *E) {
1993   if (E->isGlobalDelete())
1994     OS << "::";
1995   OS << "delete ";
1996   if (E->isArrayForm())
1997     OS << "[] ";
1998   PrintExpr(E->getArgument());
1999 }
2000 
2001 void StmtPrinter::VisitCXXPseudoDestructorExpr(CXXPseudoDestructorExpr *E) {
2002   PrintExpr(E->getBase());
2003   if (E->isArrow())
2004     OS << "->";
2005   else
2006     OS << '.';
2007   if (E->getQualifier())
2008     E->getQualifier()->print(OS, Policy);
2009   OS << "~";
2010 
2011   if (IdentifierInfo *II = E->getDestroyedTypeIdentifier())
2012     OS << II->getName();
2013   else
2014     E->getDestroyedType().print(OS, Policy);
2015 }
2016 
2017 void StmtPrinter::VisitCXXConstructExpr(CXXConstructExpr *E) {
2018   if (E->isListInitialization() && !E->isStdInitListInitialization())
2019     OS << "{";
2020 
2021   for (unsigned i = 0, e = E->getNumArgs(); i != e; ++i) {
2022     if (isa<CXXDefaultArgExpr>(E->getArg(i))) {
2023       // Don't print any defaulted arguments
2024       break;
2025     }
2026 
2027     if (i) OS << ", ";
2028     PrintExpr(E->getArg(i));
2029   }
2030 
2031   if (E->isListInitialization() && !E->isStdInitListInitialization())
2032     OS << "}";
2033 }
2034 
2035 void StmtPrinter::VisitCXXInheritedCtorInitExpr(CXXInheritedCtorInitExpr *E) {
2036   // Parens are printed by the surrounding context.
2037   OS << "<forwarded>";
2038 }
2039 
2040 void StmtPrinter::VisitCXXStdInitializerListExpr(CXXStdInitializerListExpr *E) {
2041   PrintExpr(E->getSubExpr());
2042 }
2043 
2044 void StmtPrinter::VisitExprWithCleanups(ExprWithCleanups *E) {
2045   // Just forward to the subexpression.
2046   PrintExpr(E->getSubExpr());
2047 }
2048 
2049 void
2050 StmtPrinter::VisitCXXUnresolvedConstructExpr(
2051                                            CXXUnresolvedConstructExpr *Node) {
2052   Node->getTypeAsWritten().print(OS, Policy);
2053   OS << "(";
2054   for (CXXUnresolvedConstructExpr::arg_iterator Arg = Node->arg_begin(),
2055                                              ArgEnd = Node->arg_end();
2056        Arg != ArgEnd; ++Arg) {
2057     if (Arg != Node->arg_begin())
2058       OS << ", ";
2059     PrintExpr(*Arg);
2060   }
2061   OS << ")";
2062 }
2063 
2064 void StmtPrinter::VisitCXXDependentScopeMemberExpr(
2065                                          CXXDependentScopeMemberExpr *Node) {
2066   if (!Node->isImplicitAccess()) {
2067     PrintExpr(Node->getBase());
2068     OS << (Node->isArrow() ? "->" : ".");
2069   }
2070   if (NestedNameSpecifier *Qualifier = Node->getQualifier())
2071     Qualifier->print(OS, Policy);
2072   if (Node->hasTemplateKeyword())
2073     OS << "template ";
2074   OS << Node->getMemberNameInfo();
2075   if (Node->hasExplicitTemplateArgs())
2076     printTemplateArgumentList(OS, Node->template_arguments(), Policy);
2077 }
2078 
2079 void StmtPrinter::VisitUnresolvedMemberExpr(UnresolvedMemberExpr *Node) {
2080   if (!Node->isImplicitAccess()) {
2081     PrintExpr(Node->getBase());
2082     OS << (Node->isArrow() ? "->" : ".");
2083   }
2084   if (NestedNameSpecifier *Qualifier = Node->getQualifier())
2085     Qualifier->print(OS, Policy);
2086   if (Node->hasTemplateKeyword())
2087     OS << "template ";
2088   OS << Node->getMemberNameInfo();
2089   if (Node->hasExplicitTemplateArgs())
2090     printTemplateArgumentList(OS, Node->template_arguments(), Policy);
2091 }
2092 
2093 static const char *getTypeTraitName(TypeTrait TT) {
2094   switch (TT) {
2095 #define TYPE_TRAIT_1(Spelling, Name, Key) \
2096 case clang::UTT_##Name: return #Spelling;
2097 #define TYPE_TRAIT_2(Spelling, Name, Key) \
2098 case clang::BTT_##Name: return #Spelling;
2099 #define TYPE_TRAIT_N(Spelling, Name, Key) \
2100   case clang::TT_##Name: return #Spelling;
2101 #include "clang/Basic/TokenKinds.def"
2102   }
2103   llvm_unreachable("Type trait not covered by switch");
2104 }
2105 
2106 static const char *getTypeTraitName(ArrayTypeTrait ATT) {
2107   switch (ATT) {
2108   case ATT_ArrayRank:        return "__array_rank";
2109   case ATT_ArrayExtent:      return "__array_extent";
2110   }
2111   llvm_unreachable("Array type trait not covered by switch");
2112 }
2113 
2114 static const char *getExpressionTraitName(ExpressionTrait ET) {
2115   switch (ET) {
2116   case ET_IsLValueExpr:      return "__is_lvalue_expr";
2117   case ET_IsRValueExpr:      return "__is_rvalue_expr";
2118   }
2119   llvm_unreachable("Expression type trait not covered by switch");
2120 }
2121 
2122 void StmtPrinter::VisitTypeTraitExpr(TypeTraitExpr *E) {
2123   OS << getTypeTraitName(E->getTrait()) << "(";
2124   for (unsigned I = 0, N = E->getNumArgs(); I != N; ++I) {
2125     if (I > 0)
2126       OS << ", ";
2127     E->getArg(I)->getType().print(OS, Policy);
2128   }
2129   OS << ")";
2130 }
2131 
2132 void StmtPrinter::VisitArrayTypeTraitExpr(ArrayTypeTraitExpr *E) {
2133   OS << getTypeTraitName(E->getTrait()) << '(';
2134   E->getQueriedType().print(OS, Policy);
2135   OS << ')';
2136 }
2137 
2138 void StmtPrinter::VisitExpressionTraitExpr(ExpressionTraitExpr *E) {
2139   OS << getExpressionTraitName(E->getTrait()) << '(';
2140   PrintExpr(E->getQueriedExpression());
2141   OS << ')';
2142 }
2143 
2144 void StmtPrinter::VisitCXXNoexceptExpr(CXXNoexceptExpr *E) {
2145   OS << "noexcept(";
2146   PrintExpr(E->getOperand());
2147   OS << ")";
2148 }
2149 
2150 void StmtPrinter::VisitPackExpansionExpr(PackExpansionExpr *E) {
2151   PrintExpr(E->getPattern());
2152   OS << "...";
2153 }
2154 
2155 void StmtPrinter::VisitSizeOfPackExpr(SizeOfPackExpr *E) {
2156   OS << "sizeof...(" << *E->getPack() << ")";
2157 }
2158 
2159 void StmtPrinter::VisitSubstNonTypeTemplateParmPackExpr(
2160                                        SubstNonTypeTemplateParmPackExpr *Node) {
2161   OS << *Node->getParameterPack();
2162 }
2163 
2164 void StmtPrinter::VisitSubstNonTypeTemplateParmExpr(
2165                                        SubstNonTypeTemplateParmExpr *Node) {
2166   Visit(Node->getReplacement());
2167 }
2168 
2169 void StmtPrinter::VisitFunctionParmPackExpr(FunctionParmPackExpr *E) {
2170   OS << *E->getParameterPack();
2171 }
2172 
2173 void StmtPrinter::VisitMaterializeTemporaryExpr(MaterializeTemporaryExpr *Node){
2174   PrintExpr(Node->GetTemporaryExpr());
2175 }
2176 
2177 void StmtPrinter::VisitCXXFoldExpr(CXXFoldExpr *E) {
2178   OS << "(";
2179   if (E->getLHS()) {
2180     PrintExpr(E->getLHS());
2181     OS << " " << BinaryOperator::getOpcodeStr(E->getOperator()) << " ";
2182   }
2183   OS << "...";
2184   if (E->getRHS()) {
2185     OS << " " << BinaryOperator::getOpcodeStr(E->getOperator()) << " ";
2186     PrintExpr(E->getRHS());
2187   }
2188   OS << ")";
2189 }
2190 
2191 // C++ Coroutines TS
2192 
2193 void StmtPrinter::VisitCoroutineBodyStmt(CoroutineBodyStmt *S) {
2194   Visit(S->getBody());
2195 }
2196 
2197 void StmtPrinter::VisitCoreturnStmt(CoreturnStmt *S) {
2198   OS << "co_return";
2199   if (S->getOperand()) {
2200     OS << " ";
2201     Visit(S->getOperand());
2202   }
2203   OS << ";";
2204 }
2205 
2206 void StmtPrinter::VisitCoawaitExpr(CoawaitExpr *S) {
2207   OS << "co_await ";
2208   PrintExpr(S->getOperand());
2209 }
2210 
2211 void StmtPrinter::VisitDependentCoawaitExpr(DependentCoawaitExpr *S) {
2212   OS << "co_await ";
2213   PrintExpr(S->getOperand());
2214 }
2215 
2216 void StmtPrinter::VisitCoyieldExpr(CoyieldExpr *S) {
2217   OS << "co_yield ";
2218   PrintExpr(S->getOperand());
2219 }
2220 
2221 // Obj-C
2222 
2223 void StmtPrinter::VisitObjCStringLiteral(ObjCStringLiteral *Node) {
2224   OS << "@";
2225   VisitStringLiteral(Node->getString());
2226 }
2227 
2228 void StmtPrinter::VisitObjCBoxedExpr(ObjCBoxedExpr *E) {
2229   OS << "@";
2230   Visit(E->getSubExpr());
2231 }
2232 
2233 void StmtPrinter::VisitObjCArrayLiteral(ObjCArrayLiteral *E) {
2234   OS << "@[ ";
2235   ObjCArrayLiteral::child_range Ch = E->children();
2236   for (auto I = Ch.begin(), E = Ch.end(); I != E; ++I) {
2237     if (I != Ch.begin())
2238       OS << ", ";
2239     Visit(*I);
2240   }
2241   OS << " ]";
2242 }
2243 
2244 void StmtPrinter::VisitObjCDictionaryLiteral(ObjCDictionaryLiteral *E) {
2245   OS << "@{ ";
2246   for (unsigned I = 0, N = E->getNumElements(); I != N; ++I) {
2247     if (I > 0)
2248       OS << ", ";
2249 
2250     ObjCDictionaryElement Element = E->getKeyValueElement(I);
2251     Visit(Element.Key);
2252     OS << " : ";
2253     Visit(Element.Value);
2254     if (Element.isPackExpansion())
2255       OS << "...";
2256   }
2257   OS << " }";
2258 }
2259 
2260 void StmtPrinter::VisitObjCEncodeExpr(ObjCEncodeExpr *Node) {
2261   OS << "@encode(";
2262   Node->getEncodedType().print(OS, Policy);
2263   OS << ')';
2264 }
2265 
2266 void StmtPrinter::VisitObjCSelectorExpr(ObjCSelectorExpr *Node) {
2267   OS << "@selector(";
2268   Node->getSelector().print(OS);
2269   OS << ')';
2270 }
2271 
2272 void StmtPrinter::VisitObjCProtocolExpr(ObjCProtocolExpr *Node) {
2273   OS << "@protocol(" << *Node->getProtocol() << ')';
2274 }
2275 
2276 void StmtPrinter::VisitObjCMessageExpr(ObjCMessageExpr *Mess) {
2277   OS << "[";
2278   switch (Mess->getReceiverKind()) {
2279   case ObjCMessageExpr::Instance:
2280     PrintExpr(Mess->getInstanceReceiver());
2281     break;
2282 
2283   case ObjCMessageExpr::Class:
2284     Mess->getClassReceiver().print(OS, Policy);
2285     break;
2286 
2287   case ObjCMessageExpr::SuperInstance:
2288   case ObjCMessageExpr::SuperClass:
2289     OS << "Super";
2290     break;
2291   }
2292 
2293   OS << ' ';
2294   Selector selector = Mess->getSelector();
2295   if (selector.isUnarySelector()) {
2296     OS << selector.getNameForSlot(0);
2297   } else {
2298     for (unsigned i = 0, e = Mess->getNumArgs(); i != e; ++i) {
2299       if (i < selector.getNumArgs()) {
2300         if (i > 0) OS << ' ';
2301         if (selector.getIdentifierInfoForSlot(i))
2302           OS << selector.getIdentifierInfoForSlot(i)->getName() << ':';
2303         else
2304            OS << ":";
2305       }
2306       else OS << ", "; // Handle variadic methods.
2307 
2308       PrintExpr(Mess->getArg(i));
2309     }
2310   }
2311   OS << "]";
2312 }
2313 
2314 void StmtPrinter::VisitObjCBoolLiteralExpr(ObjCBoolLiteralExpr *Node) {
2315   OS << (Node->getValue() ? "__objc_yes" : "__objc_no");
2316 }
2317 
2318 void
2319 StmtPrinter::VisitObjCIndirectCopyRestoreExpr(ObjCIndirectCopyRestoreExpr *E) {
2320   PrintExpr(E->getSubExpr());
2321 }
2322 
2323 void
2324 StmtPrinter::VisitObjCBridgedCastExpr(ObjCBridgedCastExpr *E) {
2325   OS << '(' << E->getBridgeKindName();
2326   E->getType().print(OS, Policy);
2327   OS << ')';
2328   PrintExpr(E->getSubExpr());
2329 }
2330 
2331 void StmtPrinter::VisitBlockExpr(BlockExpr *Node) {
2332   BlockDecl *BD = Node->getBlockDecl();
2333   OS << "^";
2334 
2335   const FunctionType *AFT = Node->getFunctionType();
2336 
2337   if (isa<FunctionNoProtoType>(AFT)) {
2338     OS << "()";
2339   } else if (!BD->param_empty() || cast<FunctionProtoType>(AFT)->isVariadic()) {
2340     OS << '(';
2341     for (BlockDecl::param_iterator AI = BD->param_begin(),
2342          E = BD->param_end(); AI != E; ++AI) {
2343       if (AI != BD->param_begin()) OS << ", ";
2344       std::string ParamStr = (*AI)->getNameAsString();
2345       (*AI)->getType().print(OS, Policy, ParamStr);
2346     }
2347 
2348     const auto *FT = cast<FunctionProtoType>(AFT);
2349     if (FT->isVariadic()) {
2350       if (!BD->param_empty()) OS << ", ";
2351       OS << "...";
2352     }
2353     OS << ')';
2354   }
2355   OS << "{ }";
2356 }
2357 
2358 void StmtPrinter::VisitOpaqueValueExpr(OpaqueValueExpr *Node) {
2359   PrintExpr(Node->getSourceExpr());
2360 }
2361 
2362 void StmtPrinter::VisitTypoExpr(TypoExpr *Node) {
2363   // TODO: Print something reasonable for a TypoExpr, if necessary.
2364   llvm_unreachable("Cannot print TypoExpr nodes");
2365 }
2366 
2367 void StmtPrinter::VisitAsTypeExpr(AsTypeExpr *Node) {
2368   OS << "__builtin_astype(";
2369   PrintExpr(Node->getSrcExpr());
2370   OS << ", ";
2371   Node->getType().print(OS, Policy);
2372   OS << ")";
2373 }
2374 
2375 //===----------------------------------------------------------------------===//
2376 // Stmt method implementations
2377 //===----------------------------------------------------------------------===//
2378 
2379 void Stmt::dumpPretty(const ASTContext &Context) const {
2380   printPretty(llvm::errs(), nullptr, PrintingPolicy(Context.getLangOpts()));
2381 }
2382 
2383 void Stmt::printPretty(raw_ostream &OS, PrinterHelper *Helper,
2384                        const PrintingPolicy &Policy, unsigned Indentation,
2385                        StringRef NL,
2386                        const ASTContext *Context) const {
2387   StmtPrinter P(OS, Helper, Policy, Indentation, NL, Context);
2388   P.Visit(const_cast<Stmt*>(this));
2389 }
2390 
2391 //===----------------------------------------------------------------------===//
2392 // PrinterHelper
2393 //===----------------------------------------------------------------------===//
2394 
2395 // Implement virtual destructor.
2396 PrinterHelper::~PrinterHelper() = default;
2397