1 //===- StmtPrinter.cpp - Printing implementation for Stmt 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 Stmt::dumpPretty/Stmt::printPretty methods, which
10 // pretty print the AST back out to C code.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "clang/AST/ASTContext.h"
15 #include "clang/AST/Attr.h"
16 #include "clang/AST/Decl.h"
17 #include "clang/AST/DeclBase.h"
18 #include "clang/AST/DeclCXX.h"
19 #include "clang/AST/DeclObjC.h"
20 #include "clang/AST/DeclOpenMP.h"
21 #include "clang/AST/DeclTemplate.h"
22 #include "clang/AST/Expr.h"
23 #include "clang/AST/ExprCXX.h"
24 #include "clang/AST/ExprObjC.h"
25 #include "clang/AST/ExprOpenMP.h"
26 #include "clang/AST/NestedNameSpecifier.h"
27 #include "clang/AST/OpenMPClause.h"
28 #include "clang/AST/PrettyPrinter.h"
29 #include "clang/AST/Stmt.h"
30 #include "clang/AST/StmtCXX.h"
31 #include "clang/AST/StmtObjC.h"
32 #include "clang/AST/StmtOpenMP.h"
33 #include "clang/AST/StmtVisitor.h"
34 #include "clang/AST/TemplateBase.h"
35 #include "clang/AST/Type.h"
36 #include "clang/Basic/CharInfo.h"
37 #include "clang/Basic/ExpressionTraits.h"
38 #include "clang/Basic/IdentifierTable.h"
39 #include "clang/Basic/JsonSupport.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   if (Node->isAsmGoto())
418     OS << "goto ";
419 
420   OS << "(";
421   VisitStringLiteral(Node->getAsmString());
422 
423   // Outputs
424   if (Node->getNumOutputs() != 0 || Node->getNumInputs() != 0 ||
425       Node->getNumClobbers() != 0 || Node->getNumLabels() != 0)
426     OS << " : ";
427 
428   for (unsigned i = 0, e = Node->getNumOutputs(); i != e; ++i) {
429     if (i != 0)
430       OS << ", ";
431 
432     if (!Node->getOutputName(i).empty()) {
433       OS << '[';
434       OS << Node->getOutputName(i);
435       OS << "] ";
436     }
437 
438     VisitStringLiteral(Node->getOutputConstraintLiteral(i));
439     OS << " (";
440     Visit(Node->getOutputExpr(i));
441     OS << ")";
442   }
443 
444   // Inputs
445   if (Node->getNumInputs() != 0 || Node->getNumClobbers() != 0 ||
446       Node->getNumLabels() != 0)
447     OS << " : ";
448 
449   for (unsigned i = 0, e = Node->getNumInputs(); i != e; ++i) {
450     if (i != 0)
451       OS << ", ";
452 
453     if (!Node->getInputName(i).empty()) {
454       OS << '[';
455       OS << Node->getInputName(i);
456       OS << "] ";
457     }
458 
459     VisitStringLiteral(Node->getInputConstraintLiteral(i));
460     OS << " (";
461     Visit(Node->getInputExpr(i));
462     OS << ")";
463   }
464 
465   // Clobbers
466   if (Node->getNumClobbers() != 0 || Node->getNumLabels())
467     OS << " : ";
468 
469   for (unsigned i = 0, e = Node->getNumClobbers(); i != e; ++i) {
470     if (i != 0)
471       OS << ", ";
472 
473     VisitStringLiteral(Node->getClobberStringLiteral(i));
474   }
475 
476   // Labels
477   if (Node->getNumLabels() != 0)
478     OS << " : ";
479 
480   for (unsigned i = 0, e = Node->getNumLabels(); i != e; ++i) {
481     if (i != 0)
482       OS << ", ";
483     OS << Node->getLabelName(i);
484   }
485 
486   OS << ");";
487   if (Policy.IncludeNewlines) OS << NL;
488 }
489 
490 void StmtPrinter::VisitMSAsmStmt(MSAsmStmt *Node) {
491   // FIXME: Implement MS style inline asm statement printer.
492   Indent() << "__asm ";
493   if (Node->hasBraces())
494     OS << "{" << NL;
495   OS << Node->getAsmString() << NL;
496   if (Node->hasBraces())
497     Indent() << "}" << NL;
498 }
499 
500 void StmtPrinter::VisitCapturedStmt(CapturedStmt *Node) {
501   PrintStmt(Node->getCapturedDecl()->getBody());
502 }
503 
504 void StmtPrinter::VisitObjCAtTryStmt(ObjCAtTryStmt *Node) {
505   Indent() << "@try";
506   if (auto *TS = dyn_cast<CompoundStmt>(Node->getTryBody())) {
507     PrintRawCompoundStmt(TS);
508     OS << NL;
509   }
510 
511   for (unsigned I = 0, N = Node->getNumCatchStmts(); I != N; ++I) {
512     ObjCAtCatchStmt *catchStmt = Node->getCatchStmt(I);
513     Indent() << "@catch(";
514     if (catchStmt->getCatchParamDecl()) {
515       if (Decl *DS = catchStmt->getCatchParamDecl())
516         PrintRawDecl(DS);
517     }
518     OS << ")";
519     if (auto *CS = dyn_cast<CompoundStmt>(catchStmt->getCatchBody())) {
520       PrintRawCompoundStmt(CS);
521       OS << NL;
522     }
523   }
524 
525   if (auto *FS = static_cast<ObjCAtFinallyStmt *>(Node->getFinallyStmt())) {
526     Indent() << "@finally";
527     PrintRawCompoundStmt(dyn_cast<CompoundStmt>(FS->getFinallyBody()));
528     OS << NL;
529   }
530 }
531 
532 void StmtPrinter::VisitObjCAtFinallyStmt(ObjCAtFinallyStmt *Node) {
533 }
534 
535 void StmtPrinter::VisitObjCAtCatchStmt (ObjCAtCatchStmt *Node) {
536   Indent() << "@catch (...) { /* todo */ } " << NL;
537 }
538 
539 void StmtPrinter::VisitObjCAtThrowStmt(ObjCAtThrowStmt *Node) {
540   Indent() << "@throw";
541   if (Node->getThrowExpr()) {
542     OS << " ";
543     PrintExpr(Node->getThrowExpr());
544   }
545   OS << ";" << NL;
546 }
547 
548 void StmtPrinter::VisitObjCAvailabilityCheckExpr(
549     ObjCAvailabilityCheckExpr *Node) {
550   OS << "@available(...)";
551 }
552 
553 void StmtPrinter::VisitObjCAtSynchronizedStmt(ObjCAtSynchronizedStmt *Node) {
554   Indent() << "@synchronized (";
555   PrintExpr(Node->getSynchExpr());
556   OS << ")";
557   PrintRawCompoundStmt(Node->getSynchBody());
558   OS << NL;
559 }
560 
561 void StmtPrinter::VisitObjCAutoreleasePoolStmt(ObjCAutoreleasePoolStmt *Node) {
562   Indent() << "@autoreleasepool";
563   PrintRawCompoundStmt(dyn_cast<CompoundStmt>(Node->getSubStmt()));
564   OS << NL;
565 }
566 
567 void StmtPrinter::PrintRawCXXCatchStmt(CXXCatchStmt *Node) {
568   OS << "catch (";
569   if (Decl *ExDecl = Node->getExceptionDecl())
570     PrintRawDecl(ExDecl);
571   else
572     OS << "...";
573   OS << ") ";
574   PrintRawCompoundStmt(cast<CompoundStmt>(Node->getHandlerBlock()));
575 }
576 
577 void StmtPrinter::VisitCXXCatchStmt(CXXCatchStmt *Node) {
578   Indent();
579   PrintRawCXXCatchStmt(Node);
580   OS << NL;
581 }
582 
583 void StmtPrinter::VisitCXXTryStmt(CXXTryStmt *Node) {
584   Indent() << "try ";
585   PrintRawCompoundStmt(Node->getTryBlock());
586   for (unsigned i = 0, e = Node->getNumHandlers(); i < e; ++i) {
587     OS << " ";
588     PrintRawCXXCatchStmt(Node->getHandler(i));
589   }
590   OS << NL;
591 }
592 
593 void StmtPrinter::VisitSEHTryStmt(SEHTryStmt *Node) {
594   Indent() << (Node->getIsCXXTry() ? "try " : "__try ");
595   PrintRawCompoundStmt(Node->getTryBlock());
596   SEHExceptStmt *E = Node->getExceptHandler();
597   SEHFinallyStmt *F = Node->getFinallyHandler();
598   if(E)
599     PrintRawSEHExceptHandler(E);
600   else {
601     assert(F && "Must have a finally block...");
602     PrintRawSEHFinallyStmt(F);
603   }
604   OS << NL;
605 }
606 
607 void StmtPrinter::PrintRawSEHFinallyStmt(SEHFinallyStmt *Node) {
608   OS << "__finally ";
609   PrintRawCompoundStmt(Node->getBlock());
610   OS << NL;
611 }
612 
613 void StmtPrinter::PrintRawSEHExceptHandler(SEHExceptStmt *Node) {
614   OS << "__except (";
615   VisitExpr(Node->getFilterExpr());
616   OS << ")" << NL;
617   PrintRawCompoundStmt(Node->getBlock());
618   OS << NL;
619 }
620 
621 void StmtPrinter::VisitSEHExceptStmt(SEHExceptStmt *Node) {
622   Indent();
623   PrintRawSEHExceptHandler(Node);
624   OS << NL;
625 }
626 
627 void StmtPrinter::VisitSEHFinallyStmt(SEHFinallyStmt *Node) {
628   Indent();
629   PrintRawSEHFinallyStmt(Node);
630   OS << NL;
631 }
632 
633 void StmtPrinter::VisitSEHLeaveStmt(SEHLeaveStmt *Node) {
634   Indent() << "__leave;";
635   if (Policy.IncludeNewlines) OS << NL;
636 }
637 
638 //===----------------------------------------------------------------------===//
639 //  OpenMP directives printing methods
640 //===----------------------------------------------------------------------===//
641 
642 void StmtPrinter::PrintOMPExecutableDirective(OMPExecutableDirective *S,
643                                               bool ForceNoStmt) {
644   OMPClausePrinter Printer(OS, Policy);
645   ArrayRef<OMPClause *> Clauses = S->clauses();
646   for (auto *Clause : Clauses)
647     if (Clause && !Clause->isImplicit()) {
648       OS << ' ';
649       Printer.Visit(Clause);
650     }
651   OS << NL;
652   if (!ForceNoStmt && S->hasAssociatedStmt())
653     PrintStmt(S->getInnermostCapturedStmt()->getCapturedStmt());
654 }
655 
656 void StmtPrinter::VisitOMPParallelDirective(OMPParallelDirective *Node) {
657   Indent() << "#pragma omp parallel";
658   PrintOMPExecutableDirective(Node);
659 }
660 
661 void StmtPrinter::VisitOMPSimdDirective(OMPSimdDirective *Node) {
662   Indent() << "#pragma omp simd";
663   PrintOMPExecutableDirective(Node);
664 }
665 
666 void StmtPrinter::VisitOMPForDirective(OMPForDirective *Node) {
667   Indent() << "#pragma omp for";
668   PrintOMPExecutableDirective(Node);
669 }
670 
671 void StmtPrinter::VisitOMPForSimdDirective(OMPForSimdDirective *Node) {
672   Indent() << "#pragma omp for simd";
673   PrintOMPExecutableDirective(Node);
674 }
675 
676 void StmtPrinter::VisitOMPSectionsDirective(OMPSectionsDirective *Node) {
677   Indent() << "#pragma omp sections";
678   PrintOMPExecutableDirective(Node);
679 }
680 
681 void StmtPrinter::VisitOMPSectionDirective(OMPSectionDirective *Node) {
682   Indent() << "#pragma omp section";
683   PrintOMPExecutableDirective(Node);
684 }
685 
686 void StmtPrinter::VisitOMPSingleDirective(OMPSingleDirective *Node) {
687   Indent() << "#pragma omp single";
688   PrintOMPExecutableDirective(Node);
689 }
690 
691 void StmtPrinter::VisitOMPMasterDirective(OMPMasterDirective *Node) {
692   Indent() << "#pragma omp master";
693   PrintOMPExecutableDirective(Node);
694 }
695 
696 void StmtPrinter::VisitOMPCriticalDirective(OMPCriticalDirective *Node) {
697   Indent() << "#pragma omp critical";
698   if (Node->getDirectiveName().getName()) {
699     OS << " (";
700     Node->getDirectiveName().printName(OS);
701     OS << ")";
702   }
703   PrintOMPExecutableDirective(Node);
704 }
705 
706 void StmtPrinter::VisitOMPParallelForDirective(OMPParallelForDirective *Node) {
707   Indent() << "#pragma omp parallel for";
708   PrintOMPExecutableDirective(Node);
709 }
710 
711 void StmtPrinter::VisitOMPParallelForSimdDirective(
712     OMPParallelForSimdDirective *Node) {
713   Indent() << "#pragma omp parallel for simd";
714   PrintOMPExecutableDirective(Node);
715 }
716 
717 void StmtPrinter::VisitOMPParallelSectionsDirective(
718     OMPParallelSectionsDirective *Node) {
719   Indent() << "#pragma omp parallel sections";
720   PrintOMPExecutableDirective(Node);
721 }
722 
723 void StmtPrinter::VisitOMPTaskDirective(OMPTaskDirective *Node) {
724   Indent() << "#pragma omp task";
725   PrintOMPExecutableDirective(Node);
726 }
727 
728 void StmtPrinter::VisitOMPTaskyieldDirective(OMPTaskyieldDirective *Node) {
729   Indent() << "#pragma omp taskyield";
730   PrintOMPExecutableDirective(Node);
731 }
732 
733 void StmtPrinter::VisitOMPBarrierDirective(OMPBarrierDirective *Node) {
734   Indent() << "#pragma omp barrier";
735   PrintOMPExecutableDirective(Node);
736 }
737 
738 void StmtPrinter::VisitOMPTaskwaitDirective(OMPTaskwaitDirective *Node) {
739   Indent() << "#pragma omp taskwait";
740   PrintOMPExecutableDirective(Node);
741 }
742 
743 void StmtPrinter::VisitOMPTaskgroupDirective(OMPTaskgroupDirective *Node) {
744   Indent() << "#pragma omp taskgroup";
745   PrintOMPExecutableDirective(Node);
746 }
747 
748 void StmtPrinter::VisitOMPFlushDirective(OMPFlushDirective *Node) {
749   Indent() << "#pragma omp flush";
750   PrintOMPExecutableDirective(Node);
751 }
752 
753 void StmtPrinter::VisitOMPOrderedDirective(OMPOrderedDirective *Node) {
754   Indent() << "#pragma omp ordered";
755   PrintOMPExecutableDirective(Node, Node->hasClausesOfKind<OMPDependClause>());
756 }
757 
758 void StmtPrinter::VisitOMPAtomicDirective(OMPAtomicDirective *Node) {
759   Indent() << "#pragma omp atomic";
760   PrintOMPExecutableDirective(Node);
761 }
762 
763 void StmtPrinter::VisitOMPTargetDirective(OMPTargetDirective *Node) {
764   Indent() << "#pragma omp target";
765   PrintOMPExecutableDirective(Node);
766 }
767 
768 void StmtPrinter::VisitOMPTargetDataDirective(OMPTargetDataDirective *Node) {
769   Indent() << "#pragma omp target data";
770   PrintOMPExecutableDirective(Node);
771 }
772 
773 void StmtPrinter::VisitOMPTargetEnterDataDirective(
774     OMPTargetEnterDataDirective *Node) {
775   Indent() << "#pragma omp target enter data";
776   PrintOMPExecutableDirective(Node, /*ForceNoStmt=*/true);
777 }
778 
779 void StmtPrinter::VisitOMPTargetExitDataDirective(
780     OMPTargetExitDataDirective *Node) {
781   Indent() << "#pragma omp target exit data";
782   PrintOMPExecutableDirective(Node, /*ForceNoStmt=*/true);
783 }
784 
785 void StmtPrinter::VisitOMPTargetParallelDirective(
786     OMPTargetParallelDirective *Node) {
787   Indent() << "#pragma omp target parallel";
788   PrintOMPExecutableDirective(Node);
789 }
790 
791 void StmtPrinter::VisitOMPTargetParallelForDirective(
792     OMPTargetParallelForDirective *Node) {
793   Indent() << "#pragma omp target parallel for";
794   PrintOMPExecutableDirective(Node);
795 }
796 
797 void StmtPrinter::VisitOMPTeamsDirective(OMPTeamsDirective *Node) {
798   Indent() << "#pragma omp teams";
799   PrintOMPExecutableDirective(Node);
800 }
801 
802 void StmtPrinter::VisitOMPCancellationPointDirective(
803     OMPCancellationPointDirective *Node) {
804   Indent() << "#pragma omp cancellation point "
805            << getOpenMPDirectiveName(Node->getCancelRegion());
806   PrintOMPExecutableDirective(Node);
807 }
808 
809 void StmtPrinter::VisitOMPCancelDirective(OMPCancelDirective *Node) {
810   Indent() << "#pragma omp cancel "
811            << getOpenMPDirectiveName(Node->getCancelRegion());
812   PrintOMPExecutableDirective(Node);
813 }
814 
815 void StmtPrinter::VisitOMPTaskLoopDirective(OMPTaskLoopDirective *Node) {
816   Indent() << "#pragma omp taskloop";
817   PrintOMPExecutableDirective(Node);
818 }
819 
820 void StmtPrinter::VisitOMPTaskLoopSimdDirective(
821     OMPTaskLoopSimdDirective *Node) {
822   Indent() << "#pragma omp taskloop simd";
823   PrintOMPExecutableDirective(Node);
824 }
825 
826 void StmtPrinter::VisitOMPDistributeDirective(OMPDistributeDirective *Node) {
827   Indent() << "#pragma omp distribute";
828   PrintOMPExecutableDirective(Node);
829 }
830 
831 void StmtPrinter::VisitOMPTargetUpdateDirective(
832     OMPTargetUpdateDirective *Node) {
833   Indent() << "#pragma omp target update";
834   PrintOMPExecutableDirective(Node, /*ForceNoStmt=*/true);
835 }
836 
837 void StmtPrinter::VisitOMPDistributeParallelForDirective(
838     OMPDistributeParallelForDirective *Node) {
839   Indent() << "#pragma omp distribute parallel for";
840   PrintOMPExecutableDirective(Node);
841 }
842 
843 void StmtPrinter::VisitOMPDistributeParallelForSimdDirective(
844     OMPDistributeParallelForSimdDirective *Node) {
845   Indent() << "#pragma omp distribute parallel for simd";
846   PrintOMPExecutableDirective(Node);
847 }
848 
849 void StmtPrinter::VisitOMPDistributeSimdDirective(
850     OMPDistributeSimdDirective *Node) {
851   Indent() << "#pragma omp distribute simd";
852   PrintOMPExecutableDirective(Node);
853 }
854 
855 void StmtPrinter::VisitOMPTargetParallelForSimdDirective(
856     OMPTargetParallelForSimdDirective *Node) {
857   Indent() << "#pragma omp target parallel for simd";
858   PrintOMPExecutableDirective(Node);
859 }
860 
861 void StmtPrinter::VisitOMPTargetSimdDirective(OMPTargetSimdDirective *Node) {
862   Indent() << "#pragma omp target simd";
863   PrintOMPExecutableDirective(Node);
864 }
865 
866 void StmtPrinter::VisitOMPTeamsDistributeDirective(
867     OMPTeamsDistributeDirective *Node) {
868   Indent() << "#pragma omp teams distribute";
869   PrintOMPExecutableDirective(Node);
870 }
871 
872 void StmtPrinter::VisitOMPTeamsDistributeSimdDirective(
873     OMPTeamsDistributeSimdDirective *Node) {
874   Indent() << "#pragma omp teams distribute simd";
875   PrintOMPExecutableDirective(Node);
876 }
877 
878 void StmtPrinter::VisitOMPTeamsDistributeParallelForSimdDirective(
879     OMPTeamsDistributeParallelForSimdDirective *Node) {
880   Indent() << "#pragma omp teams distribute parallel for simd";
881   PrintOMPExecutableDirective(Node);
882 }
883 
884 void StmtPrinter::VisitOMPTeamsDistributeParallelForDirective(
885     OMPTeamsDistributeParallelForDirective *Node) {
886   Indent() << "#pragma omp teams distribute parallel for";
887   PrintOMPExecutableDirective(Node);
888 }
889 
890 void StmtPrinter::VisitOMPTargetTeamsDirective(OMPTargetTeamsDirective *Node) {
891   Indent() << "#pragma omp target teams";
892   PrintOMPExecutableDirective(Node);
893 }
894 
895 void StmtPrinter::VisitOMPTargetTeamsDistributeDirective(
896     OMPTargetTeamsDistributeDirective *Node) {
897   Indent() << "#pragma omp target teams distribute";
898   PrintOMPExecutableDirective(Node);
899 }
900 
901 void StmtPrinter::VisitOMPTargetTeamsDistributeParallelForDirective(
902     OMPTargetTeamsDistributeParallelForDirective *Node) {
903   Indent() << "#pragma omp target teams distribute parallel for";
904   PrintOMPExecutableDirective(Node);
905 }
906 
907 void StmtPrinter::VisitOMPTargetTeamsDistributeParallelForSimdDirective(
908     OMPTargetTeamsDistributeParallelForSimdDirective *Node) {
909   Indent() << "#pragma omp target teams distribute parallel for simd";
910   PrintOMPExecutableDirective(Node);
911 }
912 
913 void StmtPrinter::VisitOMPTargetTeamsDistributeSimdDirective(
914     OMPTargetTeamsDistributeSimdDirective *Node) {
915   Indent() << "#pragma omp target teams distribute simd";
916   PrintOMPExecutableDirective(Node);
917 }
918 
919 //===----------------------------------------------------------------------===//
920 //  Expr printing methods.
921 //===----------------------------------------------------------------------===//
922 
923 void StmtPrinter::VisitSourceLocExpr(SourceLocExpr *Node) {
924   OS << Node->getBuiltinStr() << "()";
925 }
926 
927 void StmtPrinter::VisitConstantExpr(ConstantExpr *Node) {
928   PrintExpr(Node->getSubExpr());
929 }
930 
931 void StmtPrinter::VisitDeclRefExpr(DeclRefExpr *Node) {
932   if (const auto *OCED = dyn_cast<OMPCapturedExprDecl>(Node->getDecl())) {
933     OCED->getInit()->IgnoreImpCasts()->printPretty(OS, nullptr, Policy);
934     return;
935   }
936   if (NestedNameSpecifier *Qualifier = Node->getQualifier())
937     Qualifier->print(OS, Policy);
938   if (Node->hasTemplateKeyword())
939     OS << "template ";
940   OS << Node->getNameInfo();
941   if (Node->hasExplicitTemplateArgs())
942     printTemplateArgumentList(OS, Node->template_arguments(), Policy);
943 }
944 
945 void StmtPrinter::VisitDependentScopeDeclRefExpr(
946                                            DependentScopeDeclRefExpr *Node) {
947   if (NestedNameSpecifier *Qualifier = Node->getQualifier())
948     Qualifier->print(OS, Policy);
949   if (Node->hasTemplateKeyword())
950     OS << "template ";
951   OS << Node->getNameInfo();
952   if (Node->hasExplicitTemplateArgs())
953     printTemplateArgumentList(OS, Node->template_arguments(), Policy);
954 }
955 
956 void StmtPrinter::VisitUnresolvedLookupExpr(UnresolvedLookupExpr *Node) {
957   if (Node->getQualifier())
958     Node->getQualifier()->print(OS, Policy);
959   if (Node->hasTemplateKeyword())
960     OS << "template ";
961   OS << Node->getNameInfo();
962   if (Node->hasExplicitTemplateArgs())
963     printTemplateArgumentList(OS, Node->template_arguments(), Policy);
964 }
965 
966 static bool isImplicitSelf(const Expr *E) {
967   if (const auto *DRE = dyn_cast<DeclRefExpr>(E)) {
968     if (const auto *PD = dyn_cast<ImplicitParamDecl>(DRE->getDecl())) {
969       if (PD->getParameterKind() == ImplicitParamDecl::ObjCSelf &&
970           DRE->getBeginLoc().isInvalid())
971         return true;
972     }
973   }
974   return false;
975 }
976 
977 void StmtPrinter::VisitObjCIvarRefExpr(ObjCIvarRefExpr *Node) {
978   if (Node->getBase()) {
979     if (!Policy.SuppressImplicitBase ||
980         !isImplicitSelf(Node->getBase()->IgnoreImpCasts())) {
981       PrintExpr(Node->getBase());
982       OS << (Node->isArrow() ? "->" : ".");
983     }
984   }
985   OS << *Node->getDecl();
986 }
987 
988 void StmtPrinter::VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *Node) {
989   if (Node->isSuperReceiver())
990     OS << "super.";
991   else if (Node->isObjectReceiver() && Node->getBase()) {
992     PrintExpr(Node->getBase());
993     OS << ".";
994   } else if (Node->isClassReceiver() && Node->getClassReceiver()) {
995     OS << Node->getClassReceiver()->getName() << ".";
996   }
997 
998   if (Node->isImplicitProperty()) {
999     if (const auto *Getter = Node->getImplicitPropertyGetter())
1000       Getter->getSelector().print(OS);
1001     else
1002       OS << SelectorTable::getPropertyNameFromSetterSelector(
1003           Node->getImplicitPropertySetter()->getSelector());
1004   } else
1005     OS << Node->getExplicitProperty()->getName();
1006 }
1007 
1008 void StmtPrinter::VisitObjCSubscriptRefExpr(ObjCSubscriptRefExpr *Node) {
1009   PrintExpr(Node->getBaseExpr());
1010   OS << "[";
1011   PrintExpr(Node->getKeyExpr());
1012   OS << "]";
1013 }
1014 
1015 void StmtPrinter::VisitPredefinedExpr(PredefinedExpr *Node) {
1016   OS << PredefinedExpr::getIdentKindName(Node->getIdentKind());
1017 }
1018 
1019 void StmtPrinter::VisitCharacterLiteral(CharacterLiteral *Node) {
1020   unsigned value = Node->getValue();
1021 
1022   switch (Node->getKind()) {
1023   case CharacterLiteral::Ascii: break; // no prefix.
1024   case CharacterLiteral::Wide:  OS << 'L'; break;
1025   case CharacterLiteral::UTF8:  OS << "u8"; break;
1026   case CharacterLiteral::UTF16: OS << 'u'; break;
1027   case CharacterLiteral::UTF32: OS << 'U'; break;
1028   }
1029 
1030   switch (value) {
1031   case '\\':
1032     OS << "'\\\\'";
1033     break;
1034   case '\'':
1035     OS << "'\\''";
1036     break;
1037   case '\a':
1038     // TODO: K&R: the meaning of '\\a' is different in traditional C
1039     OS << "'\\a'";
1040     break;
1041   case '\b':
1042     OS << "'\\b'";
1043     break;
1044   // Nonstandard escape sequence.
1045   /*case '\e':
1046     OS << "'\\e'";
1047     break;*/
1048   case '\f':
1049     OS << "'\\f'";
1050     break;
1051   case '\n':
1052     OS << "'\\n'";
1053     break;
1054   case '\r':
1055     OS << "'\\r'";
1056     break;
1057   case '\t':
1058     OS << "'\\t'";
1059     break;
1060   case '\v':
1061     OS << "'\\v'";
1062     break;
1063   default:
1064     // A character literal might be sign-extended, which
1065     // would result in an invalid \U escape sequence.
1066     // FIXME: multicharacter literals such as '\xFF\xFF\xFF\xFF'
1067     // are not correctly handled.
1068     if ((value & ~0xFFu) == ~0xFFu && Node->getKind() == CharacterLiteral::Ascii)
1069       value &= 0xFFu;
1070     if (value < 256 && isPrintable((unsigned char)value))
1071       OS << "'" << (char)value << "'";
1072     else if (value < 256)
1073       OS << "'\\x" << llvm::format("%02x", value) << "'";
1074     else if (value <= 0xFFFF)
1075       OS << "'\\u" << llvm::format("%04x", value) << "'";
1076     else
1077       OS << "'\\U" << llvm::format("%08x", value) << "'";
1078   }
1079 }
1080 
1081 /// Prints the given expression using the original source text. Returns true on
1082 /// success, false otherwise.
1083 static bool printExprAsWritten(raw_ostream &OS, Expr *E,
1084                                const ASTContext *Context) {
1085   if (!Context)
1086     return false;
1087   bool Invalid = false;
1088   StringRef Source = Lexer::getSourceText(
1089       CharSourceRange::getTokenRange(E->getSourceRange()),
1090       Context->getSourceManager(), Context->getLangOpts(), &Invalid);
1091   if (!Invalid) {
1092     OS << Source;
1093     return true;
1094   }
1095   return false;
1096 }
1097 
1098 void StmtPrinter::VisitIntegerLiteral(IntegerLiteral *Node) {
1099   if (Policy.ConstantsAsWritten && printExprAsWritten(OS, Node, Context))
1100     return;
1101   bool isSigned = Node->getType()->isSignedIntegerType();
1102   OS << Node->getValue().toString(10, isSigned);
1103 
1104   // Emit suffixes.  Integer literals are always a builtin integer type.
1105   switch (Node->getType()->getAs<BuiltinType>()->getKind()) {
1106   default: llvm_unreachable("Unexpected type for integer literal!");
1107   case BuiltinType::Char_S:
1108   case BuiltinType::Char_U:    OS << "i8"; break;
1109   case BuiltinType::UChar:     OS << "Ui8"; break;
1110   case BuiltinType::Short:     OS << "i16"; break;
1111   case BuiltinType::UShort:    OS << "Ui16"; break;
1112   case BuiltinType::Int:       break; // no suffix.
1113   case BuiltinType::UInt:      OS << 'U'; break;
1114   case BuiltinType::Long:      OS << 'L'; break;
1115   case BuiltinType::ULong:     OS << "UL"; break;
1116   case BuiltinType::LongLong:  OS << "LL"; break;
1117   case BuiltinType::ULongLong: OS << "ULL"; break;
1118   }
1119 }
1120 
1121 void StmtPrinter::VisitFixedPointLiteral(FixedPointLiteral *Node) {
1122   if (Policy.ConstantsAsWritten && printExprAsWritten(OS, Node, Context))
1123     return;
1124   OS << Node->getValueAsString(/*Radix=*/10);
1125 
1126   switch (Node->getType()->getAs<BuiltinType>()->getKind()) {
1127     default: llvm_unreachable("Unexpected type for fixed point literal!");
1128     case BuiltinType::ShortFract:   OS << "hr"; break;
1129     case BuiltinType::ShortAccum:   OS << "hk"; break;
1130     case BuiltinType::UShortFract:  OS << "uhr"; break;
1131     case BuiltinType::UShortAccum:  OS << "uhk"; break;
1132     case BuiltinType::Fract:        OS << "r"; break;
1133     case BuiltinType::Accum:        OS << "k"; break;
1134     case BuiltinType::UFract:       OS << "ur"; break;
1135     case BuiltinType::UAccum:       OS << "uk"; break;
1136     case BuiltinType::LongFract:    OS << "lr"; break;
1137     case BuiltinType::LongAccum:    OS << "lk"; break;
1138     case BuiltinType::ULongFract:   OS << "ulr"; break;
1139     case BuiltinType::ULongAccum:   OS << "ulk"; break;
1140   }
1141 }
1142 
1143 static void PrintFloatingLiteral(raw_ostream &OS, FloatingLiteral *Node,
1144                                  bool PrintSuffix) {
1145   SmallString<16> Str;
1146   Node->getValue().toString(Str);
1147   OS << Str;
1148   if (Str.find_first_not_of("-0123456789") == StringRef::npos)
1149     OS << '.'; // Trailing dot in order to separate from ints.
1150 
1151   if (!PrintSuffix)
1152     return;
1153 
1154   // Emit suffixes.  Float literals are always a builtin float type.
1155   switch (Node->getType()->getAs<BuiltinType>()->getKind()) {
1156   default: llvm_unreachable("Unexpected type for float literal!");
1157   case BuiltinType::Half:       break; // FIXME: suffix?
1158   case BuiltinType::Double:     break; // no suffix.
1159   case BuiltinType::Float16:    OS << "F16"; break;
1160   case BuiltinType::Float:      OS << 'F'; break;
1161   case BuiltinType::LongDouble: OS << 'L'; break;
1162   case BuiltinType::Float128:   OS << 'Q'; break;
1163   }
1164 }
1165 
1166 void StmtPrinter::VisitFloatingLiteral(FloatingLiteral *Node) {
1167   if (Policy.ConstantsAsWritten && printExprAsWritten(OS, Node, Context))
1168     return;
1169   PrintFloatingLiteral(OS, Node, /*PrintSuffix=*/true);
1170 }
1171 
1172 void StmtPrinter::VisitImaginaryLiteral(ImaginaryLiteral *Node) {
1173   PrintExpr(Node->getSubExpr());
1174   OS << "i";
1175 }
1176 
1177 void StmtPrinter::VisitStringLiteral(StringLiteral *Str) {
1178   Str->outputString(OS);
1179 }
1180 
1181 void StmtPrinter::VisitParenExpr(ParenExpr *Node) {
1182   OS << "(";
1183   PrintExpr(Node->getSubExpr());
1184   OS << ")";
1185 }
1186 
1187 void StmtPrinter::VisitUnaryOperator(UnaryOperator *Node) {
1188   if (!Node->isPostfix()) {
1189     OS << UnaryOperator::getOpcodeStr(Node->getOpcode());
1190 
1191     // Print a space if this is an "identifier operator" like __real, or if
1192     // it might be concatenated incorrectly like '+'.
1193     switch (Node->getOpcode()) {
1194     default: break;
1195     case UO_Real:
1196     case UO_Imag:
1197     case UO_Extension:
1198       OS << ' ';
1199       break;
1200     case UO_Plus:
1201     case UO_Minus:
1202       if (isa<UnaryOperator>(Node->getSubExpr()))
1203         OS << ' ';
1204       break;
1205     }
1206   }
1207   PrintExpr(Node->getSubExpr());
1208 
1209   if (Node->isPostfix())
1210     OS << UnaryOperator::getOpcodeStr(Node->getOpcode());
1211 }
1212 
1213 void StmtPrinter::VisitOffsetOfExpr(OffsetOfExpr *Node) {
1214   OS << "__builtin_offsetof(";
1215   Node->getTypeSourceInfo()->getType().print(OS, Policy);
1216   OS << ", ";
1217   bool PrintedSomething = false;
1218   for (unsigned i = 0, n = Node->getNumComponents(); i < n; ++i) {
1219     OffsetOfNode ON = Node->getComponent(i);
1220     if (ON.getKind() == OffsetOfNode::Array) {
1221       // Array node
1222       OS << "[";
1223       PrintExpr(Node->getIndexExpr(ON.getArrayExprIndex()));
1224       OS << "]";
1225       PrintedSomething = true;
1226       continue;
1227     }
1228 
1229     // Skip implicit base indirections.
1230     if (ON.getKind() == OffsetOfNode::Base)
1231       continue;
1232 
1233     // Field or identifier node.
1234     IdentifierInfo *Id = ON.getFieldName();
1235     if (!Id)
1236       continue;
1237 
1238     if (PrintedSomething)
1239       OS << ".";
1240     else
1241       PrintedSomething = true;
1242     OS << Id->getName();
1243   }
1244   OS << ")";
1245 }
1246 
1247 void StmtPrinter::VisitUnaryExprOrTypeTraitExpr(UnaryExprOrTypeTraitExpr *Node){
1248   switch(Node->getKind()) {
1249   case UETT_SizeOf:
1250     OS << "sizeof";
1251     break;
1252   case UETT_AlignOf:
1253     if (Policy.Alignof)
1254       OS << "alignof";
1255     else if (Policy.UnderscoreAlignof)
1256       OS << "_Alignof";
1257     else
1258       OS << "__alignof";
1259     break;
1260   case UETT_PreferredAlignOf:
1261     OS << "__alignof";
1262     break;
1263   case UETT_VecStep:
1264     OS << "vec_step";
1265     break;
1266   case UETT_OpenMPRequiredSimdAlign:
1267     OS << "__builtin_omp_required_simd_align";
1268     break;
1269   }
1270   if (Node->isArgumentType()) {
1271     OS << '(';
1272     Node->getArgumentType().print(OS, Policy);
1273     OS << ')';
1274   } else {
1275     OS << " ";
1276     PrintExpr(Node->getArgumentExpr());
1277   }
1278 }
1279 
1280 void StmtPrinter::VisitGenericSelectionExpr(GenericSelectionExpr *Node) {
1281   OS << "_Generic(";
1282   PrintExpr(Node->getControllingExpr());
1283   for (const GenericSelectionExpr::Association &Assoc : Node->associations()) {
1284     OS << ", ";
1285     QualType T = Assoc.getType();
1286     if (T.isNull())
1287       OS << "default";
1288     else
1289       T.print(OS, Policy);
1290     OS << ": ";
1291     PrintExpr(Assoc.getAssociationExpr());
1292   }
1293   OS << ")";
1294 }
1295 
1296 void StmtPrinter::VisitArraySubscriptExpr(ArraySubscriptExpr *Node) {
1297   PrintExpr(Node->getLHS());
1298   OS << "[";
1299   PrintExpr(Node->getRHS());
1300   OS << "]";
1301 }
1302 
1303 void StmtPrinter::VisitOMPArraySectionExpr(OMPArraySectionExpr *Node) {
1304   PrintExpr(Node->getBase());
1305   OS << "[";
1306   if (Node->getLowerBound())
1307     PrintExpr(Node->getLowerBound());
1308   if (Node->getColonLoc().isValid()) {
1309     OS << ":";
1310     if (Node->getLength())
1311       PrintExpr(Node->getLength());
1312   }
1313   OS << "]";
1314 }
1315 
1316 void StmtPrinter::PrintCallArgs(CallExpr *Call) {
1317   for (unsigned i = 0, e = Call->getNumArgs(); i != e; ++i) {
1318     if (isa<CXXDefaultArgExpr>(Call->getArg(i))) {
1319       // Don't print any defaulted arguments
1320       break;
1321     }
1322 
1323     if (i) OS << ", ";
1324     PrintExpr(Call->getArg(i));
1325   }
1326 }
1327 
1328 void StmtPrinter::VisitCallExpr(CallExpr *Call) {
1329   PrintExpr(Call->getCallee());
1330   OS << "(";
1331   PrintCallArgs(Call);
1332   OS << ")";
1333 }
1334 
1335 static bool isImplicitThis(const Expr *E) {
1336   if (const auto *TE = dyn_cast<CXXThisExpr>(E))
1337     return TE->isImplicit();
1338   return false;
1339 }
1340 
1341 void StmtPrinter::VisitMemberExpr(MemberExpr *Node) {
1342   if (!Policy.SuppressImplicitBase || !isImplicitThis(Node->getBase())) {
1343     PrintExpr(Node->getBase());
1344 
1345     auto *ParentMember = dyn_cast<MemberExpr>(Node->getBase());
1346     FieldDecl *ParentDecl =
1347         ParentMember ? dyn_cast<FieldDecl>(ParentMember->getMemberDecl())
1348                      : nullptr;
1349 
1350     if (!ParentDecl || !ParentDecl->isAnonymousStructOrUnion())
1351       OS << (Node->isArrow() ? "->" : ".");
1352   }
1353 
1354   if (auto *FD = dyn_cast<FieldDecl>(Node->getMemberDecl()))
1355     if (FD->isAnonymousStructOrUnion())
1356       return;
1357 
1358   if (NestedNameSpecifier *Qualifier = Node->getQualifier())
1359     Qualifier->print(OS, Policy);
1360   if (Node->hasTemplateKeyword())
1361     OS << "template ";
1362   OS << Node->getMemberNameInfo();
1363   if (Node->hasExplicitTemplateArgs())
1364     printTemplateArgumentList(OS, Node->template_arguments(), Policy);
1365 }
1366 
1367 void StmtPrinter::VisitObjCIsaExpr(ObjCIsaExpr *Node) {
1368   PrintExpr(Node->getBase());
1369   OS << (Node->isArrow() ? "->isa" : ".isa");
1370 }
1371 
1372 void StmtPrinter::VisitExtVectorElementExpr(ExtVectorElementExpr *Node) {
1373   PrintExpr(Node->getBase());
1374   OS << ".";
1375   OS << Node->getAccessor().getName();
1376 }
1377 
1378 void StmtPrinter::VisitCStyleCastExpr(CStyleCastExpr *Node) {
1379   OS << '(';
1380   Node->getTypeAsWritten().print(OS, Policy);
1381   OS << ')';
1382   PrintExpr(Node->getSubExpr());
1383 }
1384 
1385 void StmtPrinter::VisitCompoundLiteralExpr(CompoundLiteralExpr *Node) {
1386   OS << '(';
1387   Node->getType().print(OS, Policy);
1388   OS << ')';
1389   PrintExpr(Node->getInitializer());
1390 }
1391 
1392 void StmtPrinter::VisitImplicitCastExpr(ImplicitCastExpr *Node) {
1393   // No need to print anything, simply forward to the subexpression.
1394   PrintExpr(Node->getSubExpr());
1395 }
1396 
1397 void StmtPrinter::VisitBinaryOperator(BinaryOperator *Node) {
1398   PrintExpr(Node->getLHS());
1399   OS << " " << BinaryOperator::getOpcodeStr(Node->getOpcode()) << " ";
1400   PrintExpr(Node->getRHS());
1401 }
1402 
1403 void StmtPrinter::VisitCompoundAssignOperator(CompoundAssignOperator *Node) {
1404   PrintExpr(Node->getLHS());
1405   OS << " " << BinaryOperator::getOpcodeStr(Node->getOpcode()) << " ";
1406   PrintExpr(Node->getRHS());
1407 }
1408 
1409 void StmtPrinter::VisitConditionalOperator(ConditionalOperator *Node) {
1410   PrintExpr(Node->getCond());
1411   OS << " ? ";
1412   PrintExpr(Node->getLHS());
1413   OS << " : ";
1414   PrintExpr(Node->getRHS());
1415 }
1416 
1417 // GNU extensions.
1418 
1419 void
1420 StmtPrinter::VisitBinaryConditionalOperator(BinaryConditionalOperator *Node) {
1421   PrintExpr(Node->getCommon());
1422   OS << " ?: ";
1423   PrintExpr(Node->getFalseExpr());
1424 }
1425 
1426 void StmtPrinter::VisitAddrLabelExpr(AddrLabelExpr *Node) {
1427   OS << "&&" << Node->getLabel()->getName();
1428 }
1429 
1430 void StmtPrinter::VisitStmtExpr(StmtExpr *E) {
1431   OS << "(";
1432   PrintRawCompoundStmt(E->getSubStmt());
1433   OS << ")";
1434 }
1435 
1436 void StmtPrinter::VisitChooseExpr(ChooseExpr *Node) {
1437   OS << "__builtin_choose_expr(";
1438   PrintExpr(Node->getCond());
1439   OS << ", ";
1440   PrintExpr(Node->getLHS());
1441   OS << ", ";
1442   PrintExpr(Node->getRHS());
1443   OS << ")";
1444 }
1445 
1446 void StmtPrinter::VisitGNUNullExpr(GNUNullExpr *) {
1447   OS << "__null";
1448 }
1449 
1450 void StmtPrinter::VisitShuffleVectorExpr(ShuffleVectorExpr *Node) {
1451   OS << "__builtin_shufflevector(";
1452   for (unsigned i = 0, e = Node->getNumSubExprs(); i != e; ++i) {
1453     if (i) OS << ", ";
1454     PrintExpr(Node->getExpr(i));
1455   }
1456   OS << ")";
1457 }
1458 
1459 void StmtPrinter::VisitConvertVectorExpr(ConvertVectorExpr *Node) {
1460   OS << "__builtin_convertvector(";
1461   PrintExpr(Node->getSrcExpr());
1462   OS << ", ";
1463   Node->getType().print(OS, Policy);
1464   OS << ")";
1465 }
1466 
1467 void StmtPrinter::VisitInitListExpr(InitListExpr* Node) {
1468   if (Node->getSyntacticForm()) {
1469     Visit(Node->getSyntacticForm());
1470     return;
1471   }
1472 
1473   OS << "{";
1474   for (unsigned i = 0, e = Node->getNumInits(); i != e; ++i) {
1475     if (i) OS << ", ";
1476     if (Node->getInit(i))
1477       PrintExpr(Node->getInit(i));
1478     else
1479       OS << "{}";
1480   }
1481   OS << "}";
1482 }
1483 
1484 void StmtPrinter::VisitArrayInitLoopExpr(ArrayInitLoopExpr *Node) {
1485   // There's no way to express this expression in any of our supported
1486   // languages, so just emit something terse and (hopefully) clear.
1487   OS << "{";
1488   PrintExpr(Node->getSubExpr());
1489   OS << "}";
1490 }
1491 
1492 void StmtPrinter::VisitArrayInitIndexExpr(ArrayInitIndexExpr *Node) {
1493   OS << "*";
1494 }
1495 
1496 void StmtPrinter::VisitParenListExpr(ParenListExpr* Node) {
1497   OS << "(";
1498   for (unsigned i = 0, e = Node->getNumExprs(); i != e; ++i) {
1499     if (i) OS << ", ";
1500     PrintExpr(Node->getExpr(i));
1501   }
1502   OS << ")";
1503 }
1504 
1505 void StmtPrinter::VisitDesignatedInitExpr(DesignatedInitExpr *Node) {
1506   bool NeedsEquals = true;
1507   for (const DesignatedInitExpr::Designator &D : Node->designators()) {
1508     if (D.isFieldDesignator()) {
1509       if (D.getDotLoc().isInvalid()) {
1510         if (IdentifierInfo *II = D.getFieldName()) {
1511           OS << II->getName() << ":";
1512           NeedsEquals = false;
1513         }
1514       } else {
1515         OS << "." << D.getFieldName()->getName();
1516       }
1517     } else {
1518       OS << "[";
1519       if (D.isArrayDesignator()) {
1520         PrintExpr(Node->getArrayIndex(D));
1521       } else {
1522         PrintExpr(Node->getArrayRangeStart(D));
1523         OS << " ... ";
1524         PrintExpr(Node->getArrayRangeEnd(D));
1525       }
1526       OS << "]";
1527     }
1528   }
1529 
1530   if (NeedsEquals)
1531     OS << " = ";
1532   else
1533     OS << " ";
1534   PrintExpr(Node->getInit());
1535 }
1536 
1537 void StmtPrinter::VisitDesignatedInitUpdateExpr(
1538     DesignatedInitUpdateExpr *Node) {
1539   OS << "{";
1540   OS << "/*base*/";
1541   PrintExpr(Node->getBase());
1542   OS << ", ";
1543 
1544   OS << "/*updater*/";
1545   PrintExpr(Node->getUpdater());
1546   OS << "}";
1547 }
1548 
1549 void StmtPrinter::VisitNoInitExpr(NoInitExpr *Node) {
1550   OS << "/*no init*/";
1551 }
1552 
1553 void StmtPrinter::VisitImplicitValueInitExpr(ImplicitValueInitExpr *Node) {
1554   if (Node->getType()->getAsCXXRecordDecl()) {
1555     OS << "/*implicit*/";
1556     Node->getType().print(OS, Policy);
1557     OS << "()";
1558   } else {
1559     OS << "/*implicit*/(";
1560     Node->getType().print(OS, Policy);
1561     OS << ')';
1562     if (Node->getType()->isRecordType())
1563       OS << "{}";
1564     else
1565       OS << 0;
1566   }
1567 }
1568 
1569 void StmtPrinter::VisitVAArgExpr(VAArgExpr *Node) {
1570   OS << "__builtin_va_arg(";
1571   PrintExpr(Node->getSubExpr());
1572   OS << ", ";
1573   Node->getType().print(OS, Policy);
1574   OS << ")";
1575 }
1576 
1577 void StmtPrinter::VisitPseudoObjectExpr(PseudoObjectExpr *Node) {
1578   PrintExpr(Node->getSyntacticForm());
1579 }
1580 
1581 void StmtPrinter::VisitAtomicExpr(AtomicExpr *Node) {
1582   const char *Name = nullptr;
1583   switch (Node->getOp()) {
1584 #define BUILTIN(ID, TYPE, ATTRS)
1585 #define ATOMIC_BUILTIN(ID, TYPE, ATTRS) \
1586   case AtomicExpr::AO ## ID: \
1587     Name = #ID "("; \
1588     break;
1589 #include "clang/Basic/Builtins.def"
1590   }
1591   OS << Name;
1592 
1593   // AtomicExpr stores its subexpressions in a permuted order.
1594   PrintExpr(Node->getPtr());
1595   if (Node->getOp() != AtomicExpr::AO__c11_atomic_load &&
1596       Node->getOp() != AtomicExpr::AO__atomic_load_n &&
1597       Node->getOp() != AtomicExpr::AO__opencl_atomic_load) {
1598     OS << ", ";
1599     PrintExpr(Node->getVal1());
1600   }
1601   if (Node->getOp() == AtomicExpr::AO__atomic_exchange ||
1602       Node->isCmpXChg()) {
1603     OS << ", ";
1604     PrintExpr(Node->getVal2());
1605   }
1606   if (Node->getOp() == AtomicExpr::AO__atomic_compare_exchange ||
1607       Node->getOp() == AtomicExpr::AO__atomic_compare_exchange_n) {
1608     OS << ", ";
1609     PrintExpr(Node->getWeak());
1610   }
1611   if (Node->getOp() != AtomicExpr::AO__c11_atomic_init &&
1612       Node->getOp() != AtomicExpr::AO__opencl_atomic_init) {
1613     OS << ", ";
1614     PrintExpr(Node->getOrder());
1615   }
1616   if (Node->isCmpXChg()) {
1617     OS << ", ";
1618     PrintExpr(Node->getOrderFail());
1619   }
1620   OS << ")";
1621 }
1622 
1623 // C++
1624 void StmtPrinter::VisitCXXOperatorCallExpr(CXXOperatorCallExpr *Node) {
1625   OverloadedOperatorKind Kind = Node->getOperator();
1626   if (Kind == OO_PlusPlus || Kind == OO_MinusMinus) {
1627     if (Node->getNumArgs() == 1) {
1628       OS << getOperatorSpelling(Kind) << ' ';
1629       PrintExpr(Node->getArg(0));
1630     } else {
1631       PrintExpr(Node->getArg(0));
1632       OS << ' ' << getOperatorSpelling(Kind);
1633     }
1634   } else if (Kind == OO_Arrow) {
1635     PrintExpr(Node->getArg(0));
1636   } else if (Kind == OO_Call) {
1637     PrintExpr(Node->getArg(0));
1638     OS << '(';
1639     for (unsigned ArgIdx = 1; ArgIdx < Node->getNumArgs(); ++ArgIdx) {
1640       if (ArgIdx > 1)
1641         OS << ", ";
1642       if (!isa<CXXDefaultArgExpr>(Node->getArg(ArgIdx)))
1643         PrintExpr(Node->getArg(ArgIdx));
1644     }
1645     OS << ')';
1646   } else if (Kind == OO_Subscript) {
1647     PrintExpr(Node->getArg(0));
1648     OS << '[';
1649     PrintExpr(Node->getArg(1));
1650     OS << ']';
1651   } else if (Node->getNumArgs() == 1) {
1652     OS << getOperatorSpelling(Kind) << ' ';
1653     PrintExpr(Node->getArg(0));
1654   } else if (Node->getNumArgs() == 2) {
1655     PrintExpr(Node->getArg(0));
1656     OS << ' ' << getOperatorSpelling(Kind) << ' ';
1657     PrintExpr(Node->getArg(1));
1658   } else {
1659     llvm_unreachable("unknown overloaded operator");
1660   }
1661 }
1662 
1663 void StmtPrinter::VisitCXXMemberCallExpr(CXXMemberCallExpr *Node) {
1664   // If we have a conversion operator call only print the argument.
1665   CXXMethodDecl *MD = Node->getMethodDecl();
1666   if (MD && isa<CXXConversionDecl>(MD)) {
1667     PrintExpr(Node->getImplicitObjectArgument());
1668     return;
1669   }
1670   VisitCallExpr(cast<CallExpr>(Node));
1671 }
1672 
1673 void StmtPrinter::VisitCUDAKernelCallExpr(CUDAKernelCallExpr *Node) {
1674   PrintExpr(Node->getCallee());
1675   OS << "<<<";
1676   PrintCallArgs(Node->getConfig());
1677   OS << ">>>(";
1678   PrintCallArgs(Node);
1679   OS << ")";
1680 }
1681 
1682 void StmtPrinter::VisitCXXNamedCastExpr(CXXNamedCastExpr *Node) {
1683   OS << Node->getCastName() << '<';
1684   Node->getTypeAsWritten().print(OS, Policy);
1685   OS << ">(";
1686   PrintExpr(Node->getSubExpr());
1687   OS << ")";
1688 }
1689 
1690 void StmtPrinter::VisitCXXStaticCastExpr(CXXStaticCastExpr *Node) {
1691   VisitCXXNamedCastExpr(Node);
1692 }
1693 
1694 void StmtPrinter::VisitCXXDynamicCastExpr(CXXDynamicCastExpr *Node) {
1695   VisitCXXNamedCastExpr(Node);
1696 }
1697 
1698 void StmtPrinter::VisitCXXReinterpretCastExpr(CXXReinterpretCastExpr *Node) {
1699   VisitCXXNamedCastExpr(Node);
1700 }
1701 
1702 void StmtPrinter::VisitCXXConstCastExpr(CXXConstCastExpr *Node) {
1703   VisitCXXNamedCastExpr(Node);
1704 }
1705 
1706 void StmtPrinter::VisitCXXTypeidExpr(CXXTypeidExpr *Node) {
1707   OS << "typeid(";
1708   if (Node->isTypeOperand()) {
1709     Node->getTypeOperandSourceInfo()->getType().print(OS, Policy);
1710   } else {
1711     PrintExpr(Node->getExprOperand());
1712   }
1713   OS << ")";
1714 }
1715 
1716 void StmtPrinter::VisitCXXUuidofExpr(CXXUuidofExpr *Node) {
1717   OS << "__uuidof(";
1718   if (Node->isTypeOperand()) {
1719     Node->getTypeOperandSourceInfo()->getType().print(OS, Policy);
1720   } else {
1721     PrintExpr(Node->getExprOperand());
1722   }
1723   OS << ")";
1724 }
1725 
1726 void StmtPrinter::VisitMSPropertyRefExpr(MSPropertyRefExpr *Node) {
1727   PrintExpr(Node->getBaseExpr());
1728   if (Node->isArrow())
1729     OS << "->";
1730   else
1731     OS << ".";
1732   if (NestedNameSpecifier *Qualifier =
1733       Node->getQualifierLoc().getNestedNameSpecifier())
1734     Qualifier->print(OS, Policy);
1735   OS << Node->getPropertyDecl()->getDeclName();
1736 }
1737 
1738 void StmtPrinter::VisitMSPropertySubscriptExpr(MSPropertySubscriptExpr *Node) {
1739   PrintExpr(Node->getBase());
1740   OS << "[";
1741   PrintExpr(Node->getIdx());
1742   OS << "]";
1743 }
1744 
1745 void StmtPrinter::VisitUserDefinedLiteral(UserDefinedLiteral *Node) {
1746   switch (Node->getLiteralOperatorKind()) {
1747   case UserDefinedLiteral::LOK_Raw:
1748     OS << cast<StringLiteral>(Node->getArg(0)->IgnoreImpCasts())->getString();
1749     break;
1750   case UserDefinedLiteral::LOK_Template: {
1751     const auto *DRE = cast<DeclRefExpr>(Node->getCallee()->IgnoreImpCasts());
1752     const TemplateArgumentList *Args =
1753       cast<FunctionDecl>(DRE->getDecl())->getTemplateSpecializationArgs();
1754     assert(Args);
1755 
1756     if (Args->size() != 1) {
1757       OS << "operator\"\"" << Node->getUDSuffix()->getName();
1758       printTemplateArgumentList(OS, Args->asArray(), Policy);
1759       OS << "()";
1760       return;
1761     }
1762 
1763     const TemplateArgument &Pack = Args->get(0);
1764     for (const auto &P : Pack.pack_elements()) {
1765       char C = (char)P.getAsIntegral().getZExtValue();
1766       OS << C;
1767     }
1768     break;
1769   }
1770   case UserDefinedLiteral::LOK_Integer: {
1771     // Print integer literal without suffix.
1772     const auto *Int = cast<IntegerLiteral>(Node->getCookedLiteral());
1773     OS << Int->getValue().toString(10, /*isSigned*/false);
1774     break;
1775   }
1776   case UserDefinedLiteral::LOK_Floating: {
1777     // Print floating literal without suffix.
1778     auto *Float = cast<FloatingLiteral>(Node->getCookedLiteral());
1779     PrintFloatingLiteral(OS, Float, /*PrintSuffix=*/false);
1780     break;
1781   }
1782   case UserDefinedLiteral::LOK_String:
1783   case UserDefinedLiteral::LOK_Character:
1784     PrintExpr(Node->getCookedLiteral());
1785     break;
1786   }
1787   OS << Node->getUDSuffix()->getName();
1788 }
1789 
1790 void StmtPrinter::VisitCXXBoolLiteralExpr(CXXBoolLiteralExpr *Node) {
1791   OS << (Node->getValue() ? "true" : "false");
1792 }
1793 
1794 void StmtPrinter::VisitCXXNullPtrLiteralExpr(CXXNullPtrLiteralExpr *Node) {
1795   OS << "nullptr";
1796 }
1797 
1798 void StmtPrinter::VisitCXXThisExpr(CXXThisExpr *Node) {
1799   OS << "this";
1800 }
1801 
1802 void StmtPrinter::VisitCXXThrowExpr(CXXThrowExpr *Node) {
1803   if (!Node->getSubExpr())
1804     OS << "throw";
1805   else {
1806     OS << "throw ";
1807     PrintExpr(Node->getSubExpr());
1808   }
1809 }
1810 
1811 void StmtPrinter::VisitCXXDefaultArgExpr(CXXDefaultArgExpr *Node) {
1812   // Nothing to print: we picked up the default argument.
1813 }
1814 
1815 void StmtPrinter::VisitCXXDefaultInitExpr(CXXDefaultInitExpr *Node) {
1816   // Nothing to print: we picked up the default initializer.
1817 }
1818 
1819 void StmtPrinter::VisitCXXFunctionalCastExpr(CXXFunctionalCastExpr *Node) {
1820   Node->getType().print(OS, Policy);
1821   // If there are no parens, this is list-initialization, and the braces are
1822   // part of the syntax of the inner construct.
1823   if (Node->getLParenLoc().isValid())
1824     OS << "(";
1825   PrintExpr(Node->getSubExpr());
1826   if (Node->getLParenLoc().isValid())
1827     OS << ")";
1828 }
1829 
1830 void StmtPrinter::VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *Node) {
1831   PrintExpr(Node->getSubExpr());
1832 }
1833 
1834 void StmtPrinter::VisitCXXTemporaryObjectExpr(CXXTemporaryObjectExpr *Node) {
1835   Node->getType().print(OS, Policy);
1836   if (Node->isStdInitListInitialization())
1837     /* Nothing to do; braces are part of creating the std::initializer_list. */;
1838   else if (Node->isListInitialization())
1839     OS << "{";
1840   else
1841     OS << "(";
1842   for (CXXTemporaryObjectExpr::arg_iterator Arg = Node->arg_begin(),
1843                                          ArgEnd = Node->arg_end();
1844        Arg != ArgEnd; ++Arg) {
1845     if ((*Arg)->isDefaultArgument())
1846       break;
1847     if (Arg != Node->arg_begin())
1848       OS << ", ";
1849     PrintExpr(*Arg);
1850   }
1851   if (Node->isStdInitListInitialization())
1852     /* See above. */;
1853   else if (Node->isListInitialization())
1854     OS << "}";
1855   else
1856     OS << ")";
1857 }
1858 
1859 void StmtPrinter::VisitLambdaExpr(LambdaExpr *Node) {
1860   OS << '[';
1861   bool NeedComma = false;
1862   switch (Node->getCaptureDefault()) {
1863   case LCD_None:
1864     break;
1865 
1866   case LCD_ByCopy:
1867     OS << '=';
1868     NeedComma = true;
1869     break;
1870 
1871   case LCD_ByRef:
1872     OS << '&';
1873     NeedComma = true;
1874     break;
1875   }
1876   for (LambdaExpr::capture_iterator C = Node->explicit_capture_begin(),
1877                                  CEnd = Node->explicit_capture_end();
1878        C != CEnd;
1879        ++C) {
1880     if (C->capturesVLAType())
1881       continue;
1882 
1883     if (NeedComma)
1884       OS << ", ";
1885     NeedComma = true;
1886 
1887     switch (C->getCaptureKind()) {
1888     case LCK_This:
1889       OS << "this";
1890       break;
1891 
1892     case LCK_StarThis:
1893       OS << "*this";
1894       break;
1895 
1896     case LCK_ByRef:
1897       if (Node->getCaptureDefault() != LCD_ByRef || Node->isInitCapture(C))
1898         OS << '&';
1899       OS << C->getCapturedVar()->getName();
1900       break;
1901 
1902     case LCK_ByCopy:
1903       OS << C->getCapturedVar()->getName();
1904       break;
1905 
1906     case LCK_VLAType:
1907       llvm_unreachable("VLA type in explicit captures.");
1908     }
1909 
1910     if (C->isPackExpansion())
1911       OS << "...";
1912 
1913     if (Node->isInitCapture(C))
1914       PrintExpr(C->getCapturedVar()->getInit());
1915   }
1916   OS << ']';
1917 
1918   if (!Node->getExplicitTemplateParameters().empty()) {
1919     Node->getTemplateParameterList()->print(
1920         OS, Node->getLambdaClass()->getASTContext(),
1921         /*OmitTemplateKW*/true);
1922   }
1923 
1924   if (Node->hasExplicitParameters()) {
1925     OS << '(';
1926     CXXMethodDecl *Method = Node->getCallOperator();
1927     NeedComma = false;
1928     for (const auto *P : Method->parameters()) {
1929       if (NeedComma) {
1930         OS << ", ";
1931       } else {
1932         NeedComma = true;
1933       }
1934       std::string ParamStr = P->getNameAsString();
1935       P->getOriginalType().print(OS, Policy, ParamStr);
1936     }
1937     if (Method->isVariadic()) {
1938       if (NeedComma)
1939         OS << ", ";
1940       OS << "...";
1941     }
1942     OS << ')';
1943 
1944     if (Node->isMutable())
1945       OS << " mutable";
1946 
1947     auto *Proto = Method->getType()->getAs<FunctionProtoType>();
1948     Proto->printExceptionSpecification(OS, Policy);
1949 
1950     // FIXME: Attributes
1951 
1952     // Print the trailing return type if it was specified in the source.
1953     if (Node->hasExplicitResultType()) {
1954       OS << " -> ";
1955       Proto->getReturnType().print(OS, Policy);
1956     }
1957   }
1958 
1959   // Print the body.
1960   OS << ' ';
1961   if (Policy.TerseOutput)
1962     OS << "{}";
1963   else
1964     PrintRawCompoundStmt(Node->getBody());
1965 }
1966 
1967 void StmtPrinter::VisitCXXScalarValueInitExpr(CXXScalarValueInitExpr *Node) {
1968   if (TypeSourceInfo *TSInfo = Node->getTypeSourceInfo())
1969     TSInfo->getType().print(OS, Policy);
1970   else
1971     Node->getType().print(OS, Policy);
1972   OS << "()";
1973 }
1974 
1975 void StmtPrinter::VisitCXXNewExpr(CXXNewExpr *E) {
1976   if (E->isGlobalNew())
1977     OS << "::";
1978   OS << "new ";
1979   unsigned NumPlace = E->getNumPlacementArgs();
1980   if (NumPlace > 0 && !isa<CXXDefaultArgExpr>(E->getPlacementArg(0))) {
1981     OS << "(";
1982     PrintExpr(E->getPlacementArg(0));
1983     for (unsigned i = 1; i < NumPlace; ++i) {
1984       if (isa<CXXDefaultArgExpr>(E->getPlacementArg(i)))
1985         break;
1986       OS << ", ";
1987       PrintExpr(E->getPlacementArg(i));
1988     }
1989     OS << ") ";
1990   }
1991   if (E->isParenTypeId())
1992     OS << "(";
1993   std::string TypeS;
1994   if (Optional<Expr *> Size = E->getArraySize()) {
1995     llvm::raw_string_ostream s(TypeS);
1996     s << '[';
1997     if (*Size)
1998       (*Size)->printPretty(s, Helper, Policy);
1999     s << ']';
2000   }
2001   E->getAllocatedType().print(OS, Policy, TypeS);
2002   if (E->isParenTypeId())
2003     OS << ")";
2004 
2005   CXXNewExpr::InitializationStyle InitStyle = E->getInitializationStyle();
2006   if (InitStyle) {
2007     if (InitStyle == CXXNewExpr::CallInit)
2008       OS << "(";
2009     PrintExpr(E->getInitializer());
2010     if (InitStyle == CXXNewExpr::CallInit)
2011       OS << ")";
2012   }
2013 }
2014 
2015 void StmtPrinter::VisitCXXDeleteExpr(CXXDeleteExpr *E) {
2016   if (E->isGlobalDelete())
2017     OS << "::";
2018   OS << "delete ";
2019   if (E->isArrayForm())
2020     OS << "[] ";
2021   PrintExpr(E->getArgument());
2022 }
2023 
2024 void StmtPrinter::VisitCXXPseudoDestructorExpr(CXXPseudoDestructorExpr *E) {
2025   PrintExpr(E->getBase());
2026   if (E->isArrow())
2027     OS << "->";
2028   else
2029     OS << '.';
2030   if (E->getQualifier())
2031     E->getQualifier()->print(OS, Policy);
2032   OS << "~";
2033 
2034   if (IdentifierInfo *II = E->getDestroyedTypeIdentifier())
2035     OS << II->getName();
2036   else
2037     E->getDestroyedType().print(OS, Policy);
2038 }
2039 
2040 void StmtPrinter::VisitCXXConstructExpr(CXXConstructExpr *E) {
2041   if (E->isListInitialization() && !E->isStdInitListInitialization())
2042     OS << "{";
2043 
2044   for (unsigned i = 0, e = E->getNumArgs(); i != e; ++i) {
2045     if (isa<CXXDefaultArgExpr>(E->getArg(i))) {
2046       // Don't print any defaulted arguments
2047       break;
2048     }
2049 
2050     if (i) OS << ", ";
2051     PrintExpr(E->getArg(i));
2052   }
2053 
2054   if (E->isListInitialization() && !E->isStdInitListInitialization())
2055     OS << "}";
2056 }
2057 
2058 void StmtPrinter::VisitCXXInheritedCtorInitExpr(CXXInheritedCtorInitExpr *E) {
2059   // Parens are printed by the surrounding context.
2060   OS << "<forwarded>";
2061 }
2062 
2063 void StmtPrinter::VisitCXXStdInitializerListExpr(CXXStdInitializerListExpr *E) {
2064   PrintExpr(E->getSubExpr());
2065 }
2066 
2067 void StmtPrinter::VisitExprWithCleanups(ExprWithCleanups *E) {
2068   // Just forward to the subexpression.
2069   PrintExpr(E->getSubExpr());
2070 }
2071 
2072 void
2073 StmtPrinter::VisitCXXUnresolvedConstructExpr(
2074                                            CXXUnresolvedConstructExpr *Node) {
2075   Node->getTypeAsWritten().print(OS, Policy);
2076   OS << "(";
2077   for (CXXUnresolvedConstructExpr::arg_iterator Arg = Node->arg_begin(),
2078                                              ArgEnd = Node->arg_end();
2079        Arg != ArgEnd; ++Arg) {
2080     if (Arg != Node->arg_begin())
2081       OS << ", ";
2082     PrintExpr(*Arg);
2083   }
2084   OS << ")";
2085 }
2086 
2087 void StmtPrinter::VisitCXXDependentScopeMemberExpr(
2088                                          CXXDependentScopeMemberExpr *Node) {
2089   if (!Node->isImplicitAccess()) {
2090     PrintExpr(Node->getBase());
2091     OS << (Node->isArrow() ? "->" : ".");
2092   }
2093   if (NestedNameSpecifier *Qualifier = Node->getQualifier())
2094     Qualifier->print(OS, Policy);
2095   if (Node->hasTemplateKeyword())
2096     OS << "template ";
2097   OS << Node->getMemberNameInfo();
2098   if (Node->hasExplicitTemplateArgs())
2099     printTemplateArgumentList(OS, Node->template_arguments(), Policy);
2100 }
2101 
2102 void StmtPrinter::VisitUnresolvedMemberExpr(UnresolvedMemberExpr *Node) {
2103   if (!Node->isImplicitAccess()) {
2104     PrintExpr(Node->getBase());
2105     OS << (Node->isArrow() ? "->" : ".");
2106   }
2107   if (NestedNameSpecifier *Qualifier = Node->getQualifier())
2108     Qualifier->print(OS, Policy);
2109   if (Node->hasTemplateKeyword())
2110     OS << "template ";
2111   OS << Node->getMemberNameInfo();
2112   if (Node->hasExplicitTemplateArgs())
2113     printTemplateArgumentList(OS, Node->template_arguments(), Policy);
2114 }
2115 
2116 static const char *getTypeTraitName(TypeTrait TT) {
2117   switch (TT) {
2118 #define TYPE_TRAIT_1(Spelling, Name, Key) \
2119 case clang::UTT_##Name: return #Spelling;
2120 #define TYPE_TRAIT_2(Spelling, Name, Key) \
2121 case clang::BTT_##Name: return #Spelling;
2122 #define TYPE_TRAIT_N(Spelling, Name, Key) \
2123   case clang::TT_##Name: return #Spelling;
2124 #include "clang/Basic/TokenKinds.def"
2125   }
2126   llvm_unreachable("Type trait not covered by switch");
2127 }
2128 
2129 static const char *getTypeTraitName(ArrayTypeTrait ATT) {
2130   switch (ATT) {
2131   case ATT_ArrayRank:        return "__array_rank";
2132   case ATT_ArrayExtent:      return "__array_extent";
2133   }
2134   llvm_unreachable("Array type trait not covered by switch");
2135 }
2136 
2137 static const char *getExpressionTraitName(ExpressionTrait ET) {
2138   switch (ET) {
2139   case ET_IsLValueExpr:      return "__is_lvalue_expr";
2140   case ET_IsRValueExpr:      return "__is_rvalue_expr";
2141   }
2142   llvm_unreachable("Expression type trait not covered by switch");
2143 }
2144 
2145 void StmtPrinter::VisitTypeTraitExpr(TypeTraitExpr *E) {
2146   OS << getTypeTraitName(E->getTrait()) << "(";
2147   for (unsigned I = 0, N = E->getNumArgs(); I != N; ++I) {
2148     if (I > 0)
2149       OS << ", ";
2150     E->getArg(I)->getType().print(OS, Policy);
2151   }
2152   OS << ")";
2153 }
2154 
2155 void StmtPrinter::VisitArrayTypeTraitExpr(ArrayTypeTraitExpr *E) {
2156   OS << getTypeTraitName(E->getTrait()) << '(';
2157   E->getQueriedType().print(OS, Policy);
2158   OS << ')';
2159 }
2160 
2161 void StmtPrinter::VisitExpressionTraitExpr(ExpressionTraitExpr *E) {
2162   OS << getExpressionTraitName(E->getTrait()) << '(';
2163   PrintExpr(E->getQueriedExpression());
2164   OS << ')';
2165 }
2166 
2167 void StmtPrinter::VisitCXXNoexceptExpr(CXXNoexceptExpr *E) {
2168   OS << "noexcept(";
2169   PrintExpr(E->getOperand());
2170   OS << ")";
2171 }
2172 
2173 void StmtPrinter::VisitPackExpansionExpr(PackExpansionExpr *E) {
2174   PrintExpr(E->getPattern());
2175   OS << "...";
2176 }
2177 
2178 void StmtPrinter::VisitSizeOfPackExpr(SizeOfPackExpr *E) {
2179   OS << "sizeof...(" << *E->getPack() << ")";
2180 }
2181 
2182 void StmtPrinter::VisitSubstNonTypeTemplateParmPackExpr(
2183                                        SubstNonTypeTemplateParmPackExpr *Node) {
2184   OS << *Node->getParameterPack();
2185 }
2186 
2187 void StmtPrinter::VisitSubstNonTypeTemplateParmExpr(
2188                                        SubstNonTypeTemplateParmExpr *Node) {
2189   Visit(Node->getReplacement());
2190 }
2191 
2192 void StmtPrinter::VisitFunctionParmPackExpr(FunctionParmPackExpr *E) {
2193   OS << *E->getParameterPack();
2194 }
2195 
2196 void StmtPrinter::VisitMaterializeTemporaryExpr(MaterializeTemporaryExpr *Node){
2197   PrintExpr(Node->GetTemporaryExpr());
2198 }
2199 
2200 void StmtPrinter::VisitCXXFoldExpr(CXXFoldExpr *E) {
2201   OS << "(";
2202   if (E->getLHS()) {
2203     PrintExpr(E->getLHS());
2204     OS << " " << BinaryOperator::getOpcodeStr(E->getOperator()) << " ";
2205   }
2206   OS << "...";
2207   if (E->getRHS()) {
2208     OS << " " << BinaryOperator::getOpcodeStr(E->getOperator()) << " ";
2209     PrintExpr(E->getRHS());
2210   }
2211   OS << ")";
2212 }
2213 
2214 // C++ Coroutines TS
2215 
2216 void StmtPrinter::VisitCoroutineBodyStmt(CoroutineBodyStmt *S) {
2217   Visit(S->getBody());
2218 }
2219 
2220 void StmtPrinter::VisitCoreturnStmt(CoreturnStmt *S) {
2221   OS << "co_return";
2222   if (S->getOperand()) {
2223     OS << " ";
2224     Visit(S->getOperand());
2225   }
2226   OS << ";";
2227 }
2228 
2229 void StmtPrinter::VisitCoawaitExpr(CoawaitExpr *S) {
2230   OS << "co_await ";
2231   PrintExpr(S->getOperand());
2232 }
2233 
2234 void StmtPrinter::VisitDependentCoawaitExpr(DependentCoawaitExpr *S) {
2235   OS << "co_await ";
2236   PrintExpr(S->getOperand());
2237 }
2238 
2239 void StmtPrinter::VisitCoyieldExpr(CoyieldExpr *S) {
2240   OS << "co_yield ";
2241   PrintExpr(S->getOperand());
2242 }
2243 
2244 // Obj-C
2245 
2246 void StmtPrinter::VisitObjCStringLiteral(ObjCStringLiteral *Node) {
2247   OS << "@";
2248   VisitStringLiteral(Node->getString());
2249 }
2250 
2251 void StmtPrinter::VisitObjCBoxedExpr(ObjCBoxedExpr *E) {
2252   OS << "@";
2253   Visit(E->getSubExpr());
2254 }
2255 
2256 void StmtPrinter::VisitObjCArrayLiteral(ObjCArrayLiteral *E) {
2257   OS << "@[ ";
2258   ObjCArrayLiteral::child_range Ch = E->children();
2259   for (auto I = Ch.begin(), E = Ch.end(); I != E; ++I) {
2260     if (I != Ch.begin())
2261       OS << ", ";
2262     Visit(*I);
2263   }
2264   OS << " ]";
2265 }
2266 
2267 void StmtPrinter::VisitObjCDictionaryLiteral(ObjCDictionaryLiteral *E) {
2268   OS << "@{ ";
2269   for (unsigned I = 0, N = E->getNumElements(); I != N; ++I) {
2270     if (I > 0)
2271       OS << ", ";
2272 
2273     ObjCDictionaryElement Element = E->getKeyValueElement(I);
2274     Visit(Element.Key);
2275     OS << " : ";
2276     Visit(Element.Value);
2277     if (Element.isPackExpansion())
2278       OS << "...";
2279   }
2280   OS << " }";
2281 }
2282 
2283 void StmtPrinter::VisitObjCEncodeExpr(ObjCEncodeExpr *Node) {
2284   OS << "@encode(";
2285   Node->getEncodedType().print(OS, Policy);
2286   OS << ')';
2287 }
2288 
2289 void StmtPrinter::VisitObjCSelectorExpr(ObjCSelectorExpr *Node) {
2290   OS << "@selector(";
2291   Node->getSelector().print(OS);
2292   OS << ')';
2293 }
2294 
2295 void StmtPrinter::VisitObjCProtocolExpr(ObjCProtocolExpr *Node) {
2296   OS << "@protocol(" << *Node->getProtocol() << ')';
2297 }
2298 
2299 void StmtPrinter::VisitObjCMessageExpr(ObjCMessageExpr *Mess) {
2300   OS << "[";
2301   switch (Mess->getReceiverKind()) {
2302   case ObjCMessageExpr::Instance:
2303     PrintExpr(Mess->getInstanceReceiver());
2304     break;
2305 
2306   case ObjCMessageExpr::Class:
2307     Mess->getClassReceiver().print(OS, Policy);
2308     break;
2309 
2310   case ObjCMessageExpr::SuperInstance:
2311   case ObjCMessageExpr::SuperClass:
2312     OS << "Super";
2313     break;
2314   }
2315 
2316   OS << ' ';
2317   Selector selector = Mess->getSelector();
2318   if (selector.isUnarySelector()) {
2319     OS << selector.getNameForSlot(0);
2320   } else {
2321     for (unsigned i = 0, e = Mess->getNumArgs(); i != e; ++i) {
2322       if (i < selector.getNumArgs()) {
2323         if (i > 0) OS << ' ';
2324         if (selector.getIdentifierInfoForSlot(i))
2325           OS << selector.getIdentifierInfoForSlot(i)->getName() << ':';
2326         else
2327            OS << ":";
2328       }
2329       else OS << ", "; // Handle variadic methods.
2330 
2331       PrintExpr(Mess->getArg(i));
2332     }
2333   }
2334   OS << "]";
2335 }
2336 
2337 void StmtPrinter::VisitObjCBoolLiteralExpr(ObjCBoolLiteralExpr *Node) {
2338   OS << (Node->getValue() ? "__objc_yes" : "__objc_no");
2339 }
2340 
2341 void
2342 StmtPrinter::VisitObjCIndirectCopyRestoreExpr(ObjCIndirectCopyRestoreExpr *E) {
2343   PrintExpr(E->getSubExpr());
2344 }
2345 
2346 void
2347 StmtPrinter::VisitObjCBridgedCastExpr(ObjCBridgedCastExpr *E) {
2348   OS << '(' << E->getBridgeKindName();
2349   E->getType().print(OS, Policy);
2350   OS << ')';
2351   PrintExpr(E->getSubExpr());
2352 }
2353 
2354 void StmtPrinter::VisitBlockExpr(BlockExpr *Node) {
2355   BlockDecl *BD = Node->getBlockDecl();
2356   OS << "^";
2357 
2358   const FunctionType *AFT = Node->getFunctionType();
2359 
2360   if (isa<FunctionNoProtoType>(AFT)) {
2361     OS << "()";
2362   } else if (!BD->param_empty() || cast<FunctionProtoType>(AFT)->isVariadic()) {
2363     OS << '(';
2364     for (BlockDecl::param_iterator AI = BD->param_begin(),
2365          E = BD->param_end(); AI != E; ++AI) {
2366       if (AI != BD->param_begin()) OS << ", ";
2367       std::string ParamStr = (*AI)->getNameAsString();
2368       (*AI)->getType().print(OS, Policy, ParamStr);
2369     }
2370 
2371     const auto *FT = cast<FunctionProtoType>(AFT);
2372     if (FT->isVariadic()) {
2373       if (!BD->param_empty()) OS << ", ";
2374       OS << "...";
2375     }
2376     OS << ')';
2377   }
2378   OS << "{ }";
2379 }
2380 
2381 void StmtPrinter::VisitOpaqueValueExpr(OpaqueValueExpr *Node) {
2382   PrintExpr(Node->getSourceExpr());
2383 }
2384 
2385 void StmtPrinter::VisitTypoExpr(TypoExpr *Node) {
2386   // TODO: Print something reasonable for a TypoExpr, if necessary.
2387   llvm_unreachable("Cannot print TypoExpr nodes");
2388 }
2389 
2390 void StmtPrinter::VisitAsTypeExpr(AsTypeExpr *Node) {
2391   OS << "__builtin_astype(";
2392   PrintExpr(Node->getSrcExpr());
2393   OS << ", ";
2394   Node->getType().print(OS, Policy);
2395   OS << ")";
2396 }
2397 
2398 //===----------------------------------------------------------------------===//
2399 // Stmt method implementations
2400 //===----------------------------------------------------------------------===//
2401 
2402 void Stmt::dumpPretty(const ASTContext &Context) const {
2403   printPretty(llvm::errs(), nullptr, PrintingPolicy(Context.getLangOpts()));
2404 }
2405 
2406 void Stmt::printPretty(raw_ostream &Out, PrinterHelper *Helper,
2407                        const PrintingPolicy &Policy, unsigned Indentation,
2408                        StringRef NL, const ASTContext *Context) const {
2409   StmtPrinter P(Out, Helper, Policy, Indentation, NL, Context);
2410   P.Visit(const_cast<Stmt *>(this));
2411 }
2412 
2413 void Stmt::printJson(raw_ostream &Out, PrinterHelper *Helper,
2414                      const PrintingPolicy &Policy, bool AddQuotes) const {
2415   std::string Buf;
2416   llvm::raw_string_ostream TempOut(Buf);
2417 
2418   printPretty(TempOut, Helper, Policy);
2419 
2420   Out << JsonFormat(TempOut.str(), AddQuotes);
2421 }
2422 
2423 //===----------------------------------------------------------------------===//
2424 // PrinterHelper
2425 //===----------------------------------------------------------------------===//
2426 
2427 // Implement virtual destructor.
2428 PrinterHelper::~PrinterHelper() = default;
2429