StmtPrinter.cpp revision 3e2fe86dd0dd65bff254e3bbdc0ea8df9282dc35 
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/DeclCXX.h"
18#include "clang/AST/DeclObjC.h"
19#include "clang/AST/DeclTemplate.h"
20#include "clang/AST/Expr.h"
21#include "clang/AST/ExprCXX.h"
22#include "clang/AST/PrettyPrinter.h"
23#include "clang/AST/StmtVisitor.h"
24#include "llvm/ADT/SmallString.h"
25using namespace clang;
26
27//===----------------------------------------------------------------------===//
28// StmtPrinter Visitor
29//===----------------------------------------------------------------------===//
30
31namespace  {
32  class StmtPrinter : public StmtVisitor<StmtPrinter> {
33    raw_ostream &OS;
34    unsigned IndentLevel;
35    clang::PrinterHelper* Helper;
36    PrintingPolicy Policy;
37
38  public:
39    StmtPrinter(raw_ostream &os, PrinterHelper* helper,
40                const PrintingPolicy &Policy,
41                unsigned Indentation = 0)
42      : OS(os), IndentLevel(Indentation), Helper(helper), Policy(Policy) {}
43
44    void PrintStmt(Stmt *S) {
45      PrintStmt(S, Policy.Indentation);
46    }
47
48    void PrintStmt(Stmt *S, int SubIndent) {
49      IndentLevel += SubIndent;
50      if (S && isa<Expr>(S)) {
51        // If this is an expr used in a stmt context, indent and newline it.
52        Indent();
53        Visit(S);
54        OS << ";\n";
55      } else if (S) {
56        Visit(S);
57      } else {
58        Indent() << "<<<NULL STATEMENT>>>\n";
59      }
60      IndentLevel -= SubIndent;
61    }
62
63    void PrintRawCompoundStmt(CompoundStmt *S);
64    void PrintRawDecl(Decl *D);
65    void PrintRawDeclStmt(const DeclStmt *S);
66    void PrintRawIfStmt(IfStmt *If);
67    void PrintRawCXXCatchStmt(CXXCatchStmt *Catch);
68    void PrintCallArgs(CallExpr *E);
69    void PrintRawSEHExceptHandler(SEHExceptStmt *S);
70    void PrintRawSEHFinallyStmt(SEHFinallyStmt *S);
71
72    void PrintExpr(Expr *E) {
73      if (E)
74        Visit(E);
75      else
76        OS << "<null expr>";
77    }
78
79    raw_ostream &Indent(int Delta = 0) {
80      for (int i = 0, e = IndentLevel+Delta; i < e; ++i)
81        OS << "  ";
82      return OS;
83    }
84
85    void Visit(Stmt* S) {
86      if (Helper && Helper->handledStmt(S,OS))
87          return;
88      else StmtVisitor<StmtPrinter>::Visit(S);
89    }
90
91    void VisitStmt(Stmt *Node) LLVM_ATTRIBUTE_UNUSED {
92      Indent() << "<<unknown stmt type>>\n";
93    }
94    void VisitExpr(Expr *Node) LLVM_ATTRIBUTE_UNUSED {
95      OS << "<<unknown expr type>>";
96    }
97    void VisitCXXNamedCastExpr(CXXNamedCastExpr *Node);
98
99#define ABSTRACT_STMT(CLASS)
100#define STMT(CLASS, PARENT) \
101    void Visit##CLASS(CLASS *Node);
102#include "clang/AST/StmtNodes.inc"
103  };
104}
105
106//===----------------------------------------------------------------------===//
107//  Stmt printing methods.
108//===----------------------------------------------------------------------===//
109
110/// PrintRawCompoundStmt - Print a compound stmt without indenting the {, and
111/// with no newline after the }.
112void StmtPrinter::PrintRawCompoundStmt(CompoundStmt *Node) {
113  OS << "{\n";
114  for (CompoundStmt::body_iterator I = Node->body_begin(), E = Node->body_end();
115       I != E; ++I)
116    PrintStmt(*I);
117
118  Indent() << "}";
119}
120
121void StmtPrinter::PrintRawDecl(Decl *D) {
122  D->print(OS, Policy, IndentLevel);
123}
124
125void StmtPrinter::PrintRawDeclStmt(const DeclStmt *S) {
126  DeclStmt::const_decl_iterator Begin = S->decl_begin(), End = S->decl_end();
127  SmallVector<Decl*, 2> Decls;
128  for ( ; Begin != End; ++Begin)
129    Decls.push_back(*Begin);
130
131  Decl::printGroup(Decls.data(), Decls.size(), OS, Policy, IndentLevel);
132}
133
134void StmtPrinter::VisitNullStmt(NullStmt *Node) {
135  Indent() << ";\n";
136}
137
138void StmtPrinter::VisitDeclStmt(DeclStmt *Node) {
139  Indent();
140  PrintRawDeclStmt(Node);
141  OS << ";\n";
142}
143
144void StmtPrinter::VisitCompoundStmt(CompoundStmt *Node) {
145  Indent();
146  PrintRawCompoundStmt(Node);
147  OS << "\n";
148}
149
150void StmtPrinter::VisitCaseStmt(CaseStmt *Node) {
151  Indent(-1) << "case ";
152  PrintExpr(Node->getLHS());
153  if (Node->getRHS()) {
154    OS << " ... ";
155    PrintExpr(Node->getRHS());
156  }
157  OS << ":\n";
158
159  PrintStmt(Node->getSubStmt(), 0);
160}
161
162void StmtPrinter::VisitDefaultStmt(DefaultStmt *Node) {
163  Indent(-1) << "default:\n";
164  PrintStmt(Node->getSubStmt(), 0);
165}
166
167void StmtPrinter::VisitLabelStmt(LabelStmt *Node) {
168  Indent(-1) << Node->getName() << ":\n";
169  PrintStmt(Node->getSubStmt(), 0);
170}
171
172void StmtPrinter::VisitAttributedStmt(AttributedStmt *Node) {
173  OS << "[[";
174  bool first = true;
175  for (ArrayRef<const Attr*>::iterator it = Node->getAttrs().begin(),
176                                       end = Node->getAttrs().end();
177                                       it != end; ++it) {
178    if (!first) {
179      OS << ", ";
180      first = false;
181    }
182    // TODO: check this
183    (*it)->printPretty(OS, Policy);
184  }
185  OS << "]] ";
186  PrintStmt(Node->getSubStmt(), 0);
187}
188
189void StmtPrinter::PrintRawIfStmt(IfStmt *If) {
190  OS << "if (";
191  if (const DeclStmt *DS = If->getConditionVariableDeclStmt())
192    PrintRawDeclStmt(DS);
193  else
194    PrintExpr(If->getCond());
195  OS << ')';
196
197  if (CompoundStmt *CS = dyn_cast<CompoundStmt>(If->getThen())) {
198    OS << ' ';
199    PrintRawCompoundStmt(CS);
200    OS << (If->getElse() ? ' ' : '\n');
201  } else {
202    OS << '\n';
203    PrintStmt(If->getThen());
204    if (If->getElse()) Indent();
205  }
206
207  if (Stmt *Else = If->getElse()) {
208    OS << "else";
209
210    if (CompoundStmt *CS = dyn_cast<CompoundStmt>(Else)) {
211      OS << ' ';
212      PrintRawCompoundStmt(CS);
213      OS << '\n';
214    } else if (IfStmt *ElseIf = dyn_cast<IfStmt>(Else)) {
215      OS << ' ';
216      PrintRawIfStmt(ElseIf);
217    } else {
218      OS << '\n';
219      PrintStmt(If->getElse());
220    }
221  }
222}
223
224void StmtPrinter::VisitIfStmt(IfStmt *If) {
225  Indent();
226  PrintRawIfStmt(If);
227}
228
229void StmtPrinter::VisitSwitchStmt(SwitchStmt *Node) {
230  Indent() << "switch (";
231  if (const DeclStmt *DS = Node->getConditionVariableDeclStmt())
232    PrintRawDeclStmt(DS);
233  else
234    PrintExpr(Node->getCond());
235  OS << ")";
236
237  // Pretty print compoundstmt bodies (very common).
238  if (CompoundStmt *CS = dyn_cast<CompoundStmt>(Node->getBody())) {
239    OS << " ";
240    PrintRawCompoundStmt(CS);
241    OS << "\n";
242  } else {
243    OS << "\n";
244    PrintStmt(Node->getBody());
245  }
246}
247
248void StmtPrinter::VisitWhileStmt(WhileStmt *Node) {
249  Indent() << "while (";
250  if (const DeclStmt *DS = Node->getConditionVariableDeclStmt())
251    PrintRawDeclStmt(DS);
252  else
253    PrintExpr(Node->getCond());
254  OS << ")\n";
255  PrintStmt(Node->getBody());
256}
257
258void StmtPrinter::VisitDoStmt(DoStmt *Node) {
259  Indent() << "do ";
260  if (CompoundStmt *CS = dyn_cast<CompoundStmt>(Node->getBody())) {
261    PrintRawCompoundStmt(CS);
262    OS << " ";
263  } else {
264    OS << "\n";
265    PrintStmt(Node->getBody());
266    Indent();
267  }
268
269  OS << "while (";
270  PrintExpr(Node->getCond());
271  OS << ");\n";
272}
273
274void StmtPrinter::VisitForStmt(ForStmt *Node) {
275  Indent() << "for (";
276  if (Node->getInit()) {
277    if (DeclStmt *DS = dyn_cast<DeclStmt>(Node->getInit()))
278      PrintRawDeclStmt(DS);
279    else
280      PrintExpr(cast<Expr>(Node->getInit()));
281  }
282  OS << ";";
283  if (Node->getCond()) {
284    OS << " ";
285    PrintExpr(Node->getCond());
286  }
287  OS << ";";
288  if (Node->getInc()) {
289    OS << " ";
290    PrintExpr(Node->getInc());
291  }
292  OS << ") ";
293
294  if (CompoundStmt *CS = dyn_cast<CompoundStmt>(Node->getBody())) {
295    PrintRawCompoundStmt(CS);
296    OS << "\n";
297  } else {
298    OS << "\n";
299    PrintStmt(Node->getBody());
300  }
301}
302
303void StmtPrinter::VisitObjCForCollectionStmt(ObjCForCollectionStmt *Node) {
304  Indent() << "for (";
305  if (DeclStmt *DS = dyn_cast<DeclStmt>(Node->getElement()))
306    PrintRawDeclStmt(DS);
307  else
308    PrintExpr(cast<Expr>(Node->getElement()));
309  OS << " in ";
310  PrintExpr(Node->getCollection());
311  OS << ") ";
312
313  if (CompoundStmt *CS = dyn_cast<CompoundStmt>(Node->getBody())) {
314    PrintRawCompoundStmt(CS);
315    OS << "\n";
316  } else {
317    OS << "\n";
318    PrintStmt(Node->getBody());
319  }
320}
321
322void StmtPrinter::VisitCXXForRangeStmt(CXXForRangeStmt *Node) {
323  Indent() << "for (";
324  PrintingPolicy SubPolicy(Policy);
325  SubPolicy.SuppressInitializers = true;
326  Node->getLoopVariable()->print(OS, SubPolicy, IndentLevel);
327  OS << " : ";
328  PrintExpr(Node->getRangeInit());
329  OS << ") {\n";
330  PrintStmt(Node->getBody());
331  Indent() << "}\n";
332}
333
334void StmtPrinter::VisitMSDependentExistsStmt(MSDependentExistsStmt *Node) {
335  Indent();
336  if (Node->isIfExists())
337    OS << "__if_exists (";
338  else
339    OS << "__if_not_exists (";
340
341  if (NestedNameSpecifier *Qualifier
342        = Node->getQualifierLoc().getNestedNameSpecifier())
343    Qualifier->print(OS, Policy);
344
345  OS << Node->getNameInfo() << ") ";
346
347  PrintRawCompoundStmt(Node->getSubStmt());
348}
349
350void StmtPrinter::VisitGotoStmt(GotoStmt *Node) {
351  Indent() << "goto " << Node->getLabel()->getName() << ";\n";
352}
353
354void StmtPrinter::VisitIndirectGotoStmt(IndirectGotoStmt *Node) {
355  Indent() << "goto *";
356  PrintExpr(Node->getTarget());
357  OS << ";\n";
358}
359
360void StmtPrinter::VisitContinueStmt(ContinueStmt *Node) {
361  Indent() << "continue;\n";
362}
363
364void StmtPrinter::VisitBreakStmt(BreakStmt *Node) {
365  Indent() << "break;\n";
366}
367
368
369void StmtPrinter::VisitReturnStmt(ReturnStmt *Node) {
370  Indent() << "return";
371  if (Node->getRetValue()) {
372    OS << " ";
373    PrintExpr(Node->getRetValue());
374  }
375  OS << ";\n";
376}
377
378
379void StmtPrinter::VisitGCCAsmStmt(GCCAsmStmt *Node) {
380  Indent() << "asm ";
381
382  if (Node->isVolatile())
383    OS << "volatile ";
384
385  OS << "(";
386  VisitStringLiteral(Node->getAsmString());
387
388  // Outputs
389  if (Node->getNumOutputs() != 0 || Node->getNumInputs() != 0 ||
390      Node->getNumClobbers() != 0)
391    OS << " : ";
392
393  for (unsigned i = 0, e = Node->getNumOutputs(); i != e; ++i) {
394    if (i != 0)
395      OS << ", ";
396
397    if (!Node->getOutputName(i).empty()) {
398      OS << '[';
399      OS << Node->getOutputName(i);
400      OS << "] ";
401    }
402
403    VisitStringLiteral(Node->getOutputConstraintLiteral(i));
404    OS << " ";
405    Visit(Node->getOutputExpr(i));
406  }
407
408  // Inputs
409  if (Node->getNumInputs() != 0 || Node->getNumClobbers() != 0)
410    OS << " : ";
411
412  for (unsigned i = 0, e = Node->getNumInputs(); i != e; ++i) {
413    if (i != 0)
414      OS << ", ";
415
416    if (!Node->getInputName(i).empty()) {
417      OS << '[';
418      OS << Node->getInputName(i);
419      OS << "] ";
420    }
421
422    VisitStringLiteral(Node->getInputConstraintLiteral(i));
423    OS << " ";
424    Visit(Node->getInputExpr(i));
425  }
426
427  // Clobbers
428  if (Node->getNumClobbers() != 0)
429    OS << " : ";
430
431  for (unsigned i = 0, e = Node->getNumClobbers(); i != e; ++i) {
432    if (i != 0)
433      OS << ", ";
434
435    VisitStringLiteral(Node->getClobberStringLiteral(i));
436  }
437
438  OS << ");\n";
439}
440
441void StmtPrinter::VisitMSAsmStmt(MSAsmStmt *Node) {
442  // FIXME: Implement MS style inline asm statement printer.
443  Indent() << "__asm ";
444  if (Node->hasBraces())
445    OS << "{\n";
446  OS << *(Node->getAsmString()) << "\n";
447  if (Node->hasBraces())
448    Indent() << "}\n";
449}
450
451void StmtPrinter::VisitObjCAtTryStmt(ObjCAtTryStmt *Node) {
452  Indent() << "@try";
453  if (CompoundStmt *TS = dyn_cast<CompoundStmt>(Node->getTryBody())) {
454    PrintRawCompoundStmt(TS);
455    OS << "\n";
456  }
457
458  for (unsigned I = 0, N = Node->getNumCatchStmts(); I != N; ++I) {
459    ObjCAtCatchStmt *catchStmt = Node->getCatchStmt(I);
460    Indent() << "@catch(";
461    if (catchStmt->getCatchParamDecl()) {
462      if (Decl *DS = catchStmt->getCatchParamDecl())
463        PrintRawDecl(DS);
464    }
465    OS << ")";
466    if (CompoundStmt *CS = dyn_cast<CompoundStmt>(catchStmt->getCatchBody())) {
467      PrintRawCompoundStmt(CS);
468      OS << "\n";
469    }
470  }
471
472  if (ObjCAtFinallyStmt *FS = static_cast<ObjCAtFinallyStmt *>(
473        Node->getFinallyStmt())) {
474    Indent() << "@finally";
475    PrintRawCompoundStmt(dyn_cast<CompoundStmt>(FS->getFinallyBody()));
476    OS << "\n";
477  }
478}
479
480void StmtPrinter::VisitObjCAtFinallyStmt(ObjCAtFinallyStmt *Node) {
481}
482
483void StmtPrinter::VisitObjCAtCatchStmt (ObjCAtCatchStmt *Node) {
484  Indent() << "@catch (...) { /* todo */ } \n";
485}
486
487void StmtPrinter::VisitObjCAtThrowStmt(ObjCAtThrowStmt *Node) {
488  Indent() << "@throw";
489  if (Node->getThrowExpr()) {
490    OS << " ";
491    PrintExpr(Node->getThrowExpr());
492  }
493  OS << ";\n";
494}
495
496void StmtPrinter::VisitObjCAtSynchronizedStmt(ObjCAtSynchronizedStmt *Node) {
497  Indent() << "@synchronized (";
498  PrintExpr(Node->getSynchExpr());
499  OS << ")";
500  PrintRawCompoundStmt(Node->getSynchBody());
501  OS << "\n";
502}
503
504void StmtPrinter::VisitObjCAutoreleasePoolStmt(ObjCAutoreleasePoolStmt *Node) {
505  Indent() << "@autoreleasepool";
506  PrintRawCompoundStmt(dyn_cast<CompoundStmt>(Node->getSubStmt()));
507  OS << "\n";
508}
509
510void StmtPrinter::PrintRawCXXCatchStmt(CXXCatchStmt *Node) {
511  OS << "catch (";
512  if (Decl *ExDecl = Node->getExceptionDecl())
513    PrintRawDecl(ExDecl);
514  else
515    OS << "...";
516  OS << ") ";
517  PrintRawCompoundStmt(cast<CompoundStmt>(Node->getHandlerBlock()));
518}
519
520void StmtPrinter::VisitCXXCatchStmt(CXXCatchStmt *Node) {
521  Indent();
522  PrintRawCXXCatchStmt(Node);
523  OS << "\n";
524}
525
526void StmtPrinter::VisitCXXTryStmt(CXXTryStmt *Node) {
527  Indent() << "try ";
528  PrintRawCompoundStmt(Node->getTryBlock());
529  for (unsigned i = 0, e = Node->getNumHandlers(); i < e; ++i) {
530    OS << " ";
531    PrintRawCXXCatchStmt(Node->getHandler(i));
532  }
533  OS << "\n";
534}
535
536void StmtPrinter::VisitSEHTryStmt(SEHTryStmt *Node) {
537  Indent() << (Node->getIsCXXTry() ? "try " : "__try ");
538  PrintRawCompoundStmt(Node->getTryBlock());
539  SEHExceptStmt *E = Node->getExceptHandler();
540  SEHFinallyStmt *F = Node->getFinallyHandler();
541  if(E)
542    PrintRawSEHExceptHandler(E);
543  else {
544    assert(F && "Must have a finally block...");
545    PrintRawSEHFinallyStmt(F);
546  }
547  OS << "\n";
548}
549
550void StmtPrinter::PrintRawSEHFinallyStmt(SEHFinallyStmt *Node) {
551  OS << "__finally ";
552  PrintRawCompoundStmt(Node->getBlock());
553  OS << "\n";
554}
555
556void StmtPrinter::PrintRawSEHExceptHandler(SEHExceptStmt *Node) {
557  OS << "__except (";
558  VisitExpr(Node->getFilterExpr());
559  OS << ")\n";
560  PrintRawCompoundStmt(Node->getBlock());
561  OS << "\n";
562}
563
564void StmtPrinter::VisitSEHExceptStmt(SEHExceptStmt *Node) {
565  Indent();
566  PrintRawSEHExceptHandler(Node);
567  OS << "\n";
568}
569
570void StmtPrinter::VisitSEHFinallyStmt(SEHFinallyStmt *Node) {
571  Indent();
572  PrintRawSEHFinallyStmt(Node);
573  OS << "\n";
574}
575
576//===----------------------------------------------------------------------===//
577//  Expr printing methods.
578//===----------------------------------------------------------------------===//
579
580void StmtPrinter::VisitDeclRefExpr(DeclRefExpr *Node) {
581  if (NestedNameSpecifier *Qualifier = Node->getQualifier())
582    Qualifier->print(OS, Policy);
583  if (Node->hasTemplateKeyword())
584    OS << "template ";
585  OS << Node->getNameInfo();
586  if (Node->hasExplicitTemplateArgs())
587    OS << TemplateSpecializationType::PrintTemplateArgumentList(
588                                                    Node->getTemplateArgs(),
589                                                    Node->getNumTemplateArgs(),
590                                                    Policy);
591}
592
593void StmtPrinter::VisitDependentScopeDeclRefExpr(
594                                           DependentScopeDeclRefExpr *Node) {
595  if (NestedNameSpecifier *Qualifier = Node->getQualifier())
596    Qualifier->print(OS, Policy);
597  if (Node->hasTemplateKeyword())
598    OS << "template ";
599  OS << Node->getNameInfo();
600  if (Node->hasExplicitTemplateArgs())
601    OS << TemplateSpecializationType::PrintTemplateArgumentList(
602                                                   Node->getTemplateArgs(),
603                                                   Node->getNumTemplateArgs(),
604                                                   Policy);
605}
606
607void StmtPrinter::VisitUnresolvedLookupExpr(UnresolvedLookupExpr *Node) {
608  if (Node->getQualifier())
609    Node->getQualifier()->print(OS, Policy);
610  if (Node->hasTemplateKeyword())
611    OS << "template ";
612  OS << Node->getNameInfo();
613  if (Node->hasExplicitTemplateArgs())
614    OS << TemplateSpecializationType::PrintTemplateArgumentList(
615                                                   Node->getTemplateArgs(),
616                                                   Node->getNumTemplateArgs(),
617                                                   Policy);
618}
619
620void StmtPrinter::VisitObjCIvarRefExpr(ObjCIvarRefExpr *Node) {
621  if (Node->getBase()) {
622    PrintExpr(Node->getBase());
623    OS << (Node->isArrow() ? "->" : ".");
624  }
625  OS << *Node->getDecl();
626}
627
628void StmtPrinter::VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *Node) {
629  if (Node->isSuperReceiver())
630    OS << "super.";
631  else if (Node->getBase()) {
632    PrintExpr(Node->getBase());
633    OS << ".";
634  }
635
636  if (Node->isImplicitProperty())
637    OS << Node->getImplicitPropertyGetter()->getSelector().getAsString();
638  else
639    OS << Node->getExplicitProperty()->getName();
640}
641
642void StmtPrinter::VisitObjCSubscriptRefExpr(ObjCSubscriptRefExpr *Node) {
643
644  PrintExpr(Node->getBaseExpr());
645  OS << "[";
646  PrintExpr(Node->getKeyExpr());
647  OS << "]";
648}
649
650void StmtPrinter::VisitPredefinedExpr(PredefinedExpr *Node) {
651  switch (Node->getIdentType()) {
652    default:
653      llvm_unreachable("unknown case");
654    case PredefinedExpr::Func:
655      OS << "__func__";
656      break;
657    case PredefinedExpr::Function:
658      OS << "__FUNCTION__";
659      break;
660    case PredefinedExpr::LFunction:
661      OS << "L__FUNCTION__";
662      break;
663    case PredefinedExpr::PrettyFunction:
664      OS << "__PRETTY_FUNCTION__";
665      break;
666  }
667}
668
669void StmtPrinter::VisitCharacterLiteral(CharacterLiteral *Node) {
670  unsigned value = Node->getValue();
671
672  switch (Node->getKind()) {
673  case CharacterLiteral::Ascii: break; // no prefix.
674  case CharacterLiteral::Wide:  OS << 'L'; break;
675  case CharacterLiteral::UTF16: OS << 'u'; break;
676  case CharacterLiteral::UTF32: OS << 'U'; break;
677  }
678
679  switch (value) {
680  case '\\':
681    OS << "'\\\\'";
682    break;
683  case '\'':
684    OS << "'\\''";
685    break;
686  case '\a':
687    // TODO: K&R: the meaning of '\\a' is different in traditional C
688    OS << "'\\a'";
689    break;
690  case '\b':
691    OS << "'\\b'";
692    break;
693  // Nonstandard escape sequence.
694  /*case '\e':
695    OS << "'\\e'";
696    break;*/
697  case '\f':
698    OS << "'\\f'";
699    break;
700  case '\n':
701    OS << "'\\n'";
702    break;
703  case '\r':
704    OS << "'\\r'";
705    break;
706  case '\t':
707    OS << "'\\t'";
708    break;
709  case '\v':
710    OS << "'\\v'";
711    break;
712  default:
713    if (value < 256 && isprint(value)) {
714      OS << "'" << (char)value << "'";
715    } else if (value < 256) {
716      OS << "'\\x";
717      OS.write_hex(value) << "'";
718    } else {
719      // FIXME what to really do here?
720      OS << value;
721    }
722  }
723}
724
725void StmtPrinter::VisitIntegerLiteral(IntegerLiteral *Node) {
726  bool isSigned = Node->getType()->isSignedIntegerType();
727  OS << Node->getValue().toString(10, isSigned);
728
729  // Emit suffixes.  Integer literals are always a builtin integer type.
730  switch (Node->getType()->getAs<BuiltinType>()->getKind()) {
731  default: llvm_unreachable("Unexpected type for integer literal!");
732  // FIXME: The Short and UShort cases are to handle cases where a short
733  // integeral literal is formed during template instantiation.  They should
734  // be removed when template instantiation no longer needs integer literals.
735  case BuiltinType::Short:
736  case BuiltinType::UShort:
737  case BuiltinType::Int:       break; // no suffix.
738  case BuiltinType::UInt:      OS << 'U'; break;
739  case BuiltinType::Long:      OS << 'L'; break;
740  case BuiltinType::ULong:     OS << "UL"; break;
741  case BuiltinType::LongLong:  OS << "LL"; break;
742  case BuiltinType::ULongLong: OS << "ULL"; break;
743  case BuiltinType::Int128:    OS << "i128"; break;
744  case BuiltinType::UInt128:   OS << "Ui128"; break;
745  }
746}
747
748static void PrintFloatingLiteral(raw_ostream &OS, FloatingLiteral *Node,
749                                 bool PrintSuffix) {
750  SmallString<16> Str;
751  Node->getValue().toString(Str);
752  OS << Str;
753  if (Str.find_first_not_of("-0123456789") == StringRef::npos)
754    OS << '.'; // Trailing dot in order to separate from ints.
755
756  if (!PrintSuffix)
757    return;
758
759  // Emit suffixes.  Float literals are always a builtin float type.
760  switch (Node->getType()->getAs<BuiltinType>()->getKind()) {
761  default: llvm_unreachable("Unexpected type for float literal!");
762  case BuiltinType::Half:       break; // FIXME: suffix?
763  case BuiltinType::Double:     break; // no suffix.
764  case BuiltinType::Float:      OS << 'F'; break;
765  case BuiltinType::LongDouble: OS << 'L'; break;
766  }
767}
768
769void StmtPrinter::VisitFloatingLiteral(FloatingLiteral *Node) {
770  PrintFloatingLiteral(OS, Node, /*PrintSuffix=*/true);
771}
772
773void StmtPrinter::VisitImaginaryLiteral(ImaginaryLiteral *Node) {
774  PrintExpr(Node->getSubExpr());
775  OS << "i";
776}
777
778void StmtPrinter::VisitStringLiteral(StringLiteral *Str) {
779  Str->outputString(OS);
780}
781void StmtPrinter::VisitParenExpr(ParenExpr *Node) {
782  OS << "(";
783  PrintExpr(Node->getSubExpr());
784  OS << ")";
785}
786void StmtPrinter::VisitUnaryOperator(UnaryOperator *Node) {
787  if (!Node->isPostfix()) {
788    OS << UnaryOperator::getOpcodeStr(Node->getOpcode());
789
790    // Print a space if this is an "identifier operator" like __real, or if
791    // it might be concatenated incorrectly like '+'.
792    switch (Node->getOpcode()) {
793    default: break;
794    case UO_Real:
795    case UO_Imag:
796    case UO_Extension:
797      OS << ' ';
798      break;
799    case UO_Plus:
800    case UO_Minus:
801      if (isa<UnaryOperator>(Node->getSubExpr()))
802        OS << ' ';
803      break;
804    }
805  }
806  PrintExpr(Node->getSubExpr());
807
808  if (Node->isPostfix())
809    OS << UnaryOperator::getOpcodeStr(Node->getOpcode());
810}
811
812void StmtPrinter::VisitOffsetOfExpr(OffsetOfExpr *Node) {
813  OS << "__builtin_offsetof(";
814  OS << Node->getTypeSourceInfo()->getType().getAsString(Policy) << ", ";
815  bool PrintedSomething = false;
816  for (unsigned i = 0, n = Node->getNumComponents(); i < n; ++i) {
817    OffsetOfExpr::OffsetOfNode ON = Node->getComponent(i);
818    if (ON.getKind() == OffsetOfExpr::OffsetOfNode::Array) {
819      // Array node
820      OS << "[";
821      PrintExpr(Node->getIndexExpr(ON.getArrayExprIndex()));
822      OS << "]";
823      PrintedSomething = true;
824      continue;
825    }
826
827    // Skip implicit base indirections.
828    if (ON.getKind() == OffsetOfExpr::OffsetOfNode::Base)
829      continue;
830
831    // Field or identifier node.
832    IdentifierInfo *Id = ON.getFieldName();
833    if (!Id)
834      continue;
835
836    if (PrintedSomething)
837      OS << ".";
838    else
839      PrintedSomething = true;
840    OS << Id->getName();
841  }
842  OS << ")";
843}
844
845void StmtPrinter::VisitUnaryExprOrTypeTraitExpr(UnaryExprOrTypeTraitExpr *Node){
846  switch(Node->getKind()) {
847  case UETT_SizeOf:
848    OS << "sizeof";
849    break;
850  case UETT_AlignOf:
851    if (Policy.LangOpts.CPlusPlus)
852      OS << "alignof";
853    else if (Policy.LangOpts.C11)
854      OS << "_Alignof";
855    else
856      OS << "__alignof";
857    break;
858  case UETT_VecStep:
859    OS << "vec_step";
860    break;
861  }
862  if (Node->isArgumentType())
863    OS << "(" << Node->getArgumentType().getAsString(Policy) << ")";
864  else {
865    OS << " ";
866    PrintExpr(Node->getArgumentExpr());
867  }
868}
869
870void StmtPrinter::VisitGenericSelectionExpr(GenericSelectionExpr *Node) {
871  OS << "_Generic(";
872  PrintExpr(Node->getControllingExpr());
873  for (unsigned i = 0; i != Node->getNumAssocs(); ++i) {
874    OS << ", ";
875    QualType T = Node->getAssocType(i);
876    if (T.isNull())
877      OS << "default";
878    else
879      OS << T.getAsString(Policy);
880    OS << ": ";
881    PrintExpr(Node->getAssocExpr(i));
882  }
883  OS << ")";
884}
885
886void StmtPrinter::VisitArraySubscriptExpr(ArraySubscriptExpr *Node) {
887  PrintExpr(Node->getLHS());
888  OS << "[";
889  PrintExpr(Node->getRHS());
890  OS << "]";
891}
892
893void StmtPrinter::PrintCallArgs(CallExpr *Call) {
894  for (unsigned i = 0, e = Call->getNumArgs(); i != e; ++i) {
895    if (isa<CXXDefaultArgExpr>(Call->getArg(i))) {
896      // Don't print any defaulted arguments
897      break;
898    }
899
900    if (i) OS << ", ";
901    PrintExpr(Call->getArg(i));
902  }
903}
904
905void StmtPrinter::VisitCallExpr(CallExpr *Call) {
906  PrintExpr(Call->getCallee());
907  OS << "(";
908  PrintCallArgs(Call);
909  OS << ")";
910}
911void StmtPrinter::VisitMemberExpr(MemberExpr *Node) {
912  // FIXME: Suppress printing implicit bases (like "this")
913  PrintExpr(Node->getBase());
914
915  MemberExpr *ParentMember = dyn_cast<MemberExpr>(Node->getBase());
916  FieldDecl  *ParentDecl   = ParentMember
917    ? dyn_cast<FieldDecl>(ParentMember->getMemberDecl()) : NULL;
918
919  if (!ParentDecl || !ParentDecl->isAnonymousStructOrUnion())
920    OS << (Node->isArrow() ? "->" : ".");
921
922  if (FieldDecl *FD = dyn_cast<FieldDecl>(Node->getMemberDecl()))
923    if (FD->isAnonymousStructOrUnion())
924      return;
925
926  if (NestedNameSpecifier *Qualifier = Node->getQualifier())
927    Qualifier->print(OS, Policy);
928  if (Node->hasTemplateKeyword())
929    OS << "template ";
930  OS << Node->getMemberNameInfo();
931  if (Node->hasExplicitTemplateArgs())
932    OS << TemplateSpecializationType::PrintTemplateArgumentList(
933                                                    Node->getTemplateArgs(),
934                                                    Node->getNumTemplateArgs(),
935                                                                Policy);
936}
937void StmtPrinter::VisitObjCIsaExpr(ObjCIsaExpr *Node) {
938  PrintExpr(Node->getBase());
939  OS << (Node->isArrow() ? "->isa" : ".isa");
940}
941
942void StmtPrinter::VisitExtVectorElementExpr(ExtVectorElementExpr *Node) {
943  PrintExpr(Node->getBase());
944  OS << ".";
945  OS << Node->getAccessor().getName();
946}
947void StmtPrinter::VisitCStyleCastExpr(CStyleCastExpr *Node) {
948  OS << "(" << Node->getTypeAsWritten().getAsString(Policy) << ")";
949  PrintExpr(Node->getSubExpr());
950}
951void StmtPrinter::VisitCompoundLiteralExpr(CompoundLiteralExpr *Node) {
952  OS << "(" << Node->getType().getAsString(Policy) << ")";
953  PrintExpr(Node->getInitializer());
954}
955void StmtPrinter::VisitImplicitCastExpr(ImplicitCastExpr *Node) {
956  // No need to print anything, simply forward to the sub expression.
957  PrintExpr(Node->getSubExpr());
958}
959void StmtPrinter::VisitBinaryOperator(BinaryOperator *Node) {
960  PrintExpr(Node->getLHS());
961  OS << " " << BinaryOperator::getOpcodeStr(Node->getOpcode()) << " ";
962  PrintExpr(Node->getRHS());
963}
964void StmtPrinter::VisitCompoundAssignOperator(CompoundAssignOperator *Node) {
965  PrintExpr(Node->getLHS());
966  OS << " " << BinaryOperator::getOpcodeStr(Node->getOpcode()) << " ";
967  PrintExpr(Node->getRHS());
968}
969void StmtPrinter::VisitConditionalOperator(ConditionalOperator *Node) {
970  PrintExpr(Node->getCond());
971  OS << " ? ";
972  PrintExpr(Node->getLHS());
973  OS << " : ";
974  PrintExpr(Node->getRHS());
975}
976
977// GNU extensions.
978
979void
980StmtPrinter::VisitBinaryConditionalOperator(BinaryConditionalOperator *Node) {
981  PrintExpr(Node->getCommon());
982  OS << " ?: ";
983  PrintExpr(Node->getFalseExpr());
984}
985void StmtPrinter::VisitAddrLabelExpr(AddrLabelExpr *Node) {
986  OS << "&&" << Node->getLabel()->getName();
987}
988
989void StmtPrinter::VisitStmtExpr(StmtExpr *E) {
990  OS << "(";
991  PrintRawCompoundStmt(E->getSubStmt());
992  OS << ")";
993}
994
995void StmtPrinter::VisitChooseExpr(ChooseExpr *Node) {
996  OS << "__builtin_choose_expr(";
997  PrintExpr(Node->getCond());
998  OS << ", ";
999  PrintExpr(Node->getLHS());
1000  OS << ", ";
1001  PrintExpr(Node->getRHS());
1002  OS << ")";
1003}
1004
1005void StmtPrinter::VisitGNUNullExpr(GNUNullExpr *) {
1006  OS << "__null";
1007}
1008
1009void StmtPrinter::VisitShuffleVectorExpr(ShuffleVectorExpr *Node) {
1010  OS << "__builtin_shufflevector(";
1011  for (unsigned i = 0, e = Node->getNumSubExprs(); i != e; ++i) {
1012    if (i) OS << ", ";
1013    PrintExpr(Node->getExpr(i));
1014  }
1015  OS << ")";
1016}
1017
1018void StmtPrinter::VisitInitListExpr(InitListExpr* Node) {
1019  if (Node->getSyntacticForm()) {
1020    Visit(Node->getSyntacticForm());
1021    return;
1022  }
1023
1024  OS << "{ ";
1025  for (unsigned i = 0, e = Node->getNumInits(); i != e; ++i) {
1026    if (i) OS << ", ";
1027    if (Node->getInit(i))
1028      PrintExpr(Node->getInit(i));
1029    else
1030      OS << "0";
1031  }
1032  OS << " }";
1033}
1034
1035void StmtPrinter::VisitParenListExpr(ParenListExpr* Node) {
1036  OS << "( ";
1037  for (unsigned i = 0, e = Node->getNumExprs(); i != e; ++i) {
1038    if (i) OS << ", ";
1039    PrintExpr(Node->getExpr(i));
1040  }
1041  OS << " )";
1042}
1043
1044void StmtPrinter::VisitDesignatedInitExpr(DesignatedInitExpr *Node) {
1045  for (DesignatedInitExpr::designators_iterator D = Node->designators_begin(),
1046                      DEnd = Node->designators_end();
1047       D != DEnd; ++D) {
1048    if (D->isFieldDesignator()) {
1049      if (D->getDotLoc().isInvalid())
1050        OS << D->getFieldName()->getName() << ":";
1051      else
1052        OS << "." << D->getFieldName()->getName();
1053    } else {
1054      OS << "[";
1055      if (D->isArrayDesignator()) {
1056        PrintExpr(Node->getArrayIndex(*D));
1057      } else {
1058        PrintExpr(Node->getArrayRangeStart(*D));
1059        OS << " ... ";
1060        PrintExpr(Node->getArrayRangeEnd(*D));
1061      }
1062      OS << "]";
1063    }
1064  }
1065
1066  OS << " = ";
1067  PrintExpr(Node->getInit());
1068}
1069
1070void StmtPrinter::VisitImplicitValueInitExpr(ImplicitValueInitExpr *Node) {
1071  if (Policy.LangOpts.CPlusPlus)
1072    OS << "/*implicit*/" << Node->getType().getAsString(Policy) << "()";
1073  else {
1074    OS << "/*implicit*/(" << Node->getType().getAsString(Policy) << ")";
1075    if (Node->getType()->isRecordType())
1076      OS << "{}";
1077    else
1078      OS << 0;
1079  }
1080}
1081
1082void StmtPrinter::VisitVAArgExpr(VAArgExpr *Node) {
1083  OS << "__builtin_va_arg(";
1084  PrintExpr(Node->getSubExpr());
1085  OS << ", ";
1086  OS << Node->getType().getAsString(Policy);
1087  OS << ")";
1088}
1089
1090void StmtPrinter::VisitPseudoObjectExpr(PseudoObjectExpr *Node) {
1091  PrintExpr(Node->getSyntacticForm());
1092}
1093
1094void StmtPrinter::VisitAtomicExpr(AtomicExpr *Node) {
1095  const char *Name = 0;
1096  switch (Node->getOp()) {
1097#define BUILTIN(ID, TYPE, ATTRS)
1098#define ATOMIC_BUILTIN(ID, TYPE, ATTRS) \
1099  case AtomicExpr::AO ## ID: \
1100    Name = #ID "("; \
1101    break;
1102#include "clang/Basic/Builtins.def"
1103  }
1104  OS << Name;
1105
1106  // AtomicExpr stores its subexpressions in a permuted order.
1107  PrintExpr(Node->getPtr());
1108  OS << ", ";
1109  if (Node->getOp() != AtomicExpr::AO__c11_atomic_load &&
1110      Node->getOp() != AtomicExpr::AO__atomic_load_n) {
1111    PrintExpr(Node->getVal1());
1112    OS << ", ";
1113  }
1114  if (Node->getOp() == AtomicExpr::AO__atomic_exchange ||
1115      Node->isCmpXChg()) {
1116    PrintExpr(Node->getVal2());
1117    OS << ", ";
1118  }
1119  if (Node->getOp() == AtomicExpr::AO__atomic_compare_exchange ||
1120      Node->getOp() == AtomicExpr::AO__atomic_compare_exchange_n) {
1121    PrintExpr(Node->getWeak());
1122    OS << ", ";
1123  }
1124  if (Node->getOp() != AtomicExpr::AO__c11_atomic_init)
1125    PrintExpr(Node->getOrder());
1126  if (Node->isCmpXChg()) {
1127    OS << ", ";
1128    PrintExpr(Node->getOrderFail());
1129  }
1130  OS << ")";
1131}
1132
1133// C++
1134void StmtPrinter::VisitCXXOperatorCallExpr(CXXOperatorCallExpr *Node) {
1135  const char *OpStrings[NUM_OVERLOADED_OPERATORS] = {
1136    "",
1137#define OVERLOADED_OPERATOR(Name,Spelling,Token,Unary,Binary,MemberOnly) \
1138    Spelling,
1139#include "clang/Basic/OperatorKinds.def"
1140  };
1141
1142  OverloadedOperatorKind Kind = Node->getOperator();
1143  if (Kind == OO_PlusPlus || Kind == OO_MinusMinus) {
1144    if (Node->getNumArgs() == 1) {
1145      OS << OpStrings[Kind] << ' ';
1146      PrintExpr(Node->getArg(0));
1147    } else {
1148      PrintExpr(Node->getArg(0));
1149      OS << ' ' << OpStrings[Kind];
1150    }
1151  } else if (Kind == OO_Arrow) {
1152    PrintExpr(Node->getArg(0));
1153  } else if (Kind == OO_Call) {
1154    PrintExpr(Node->getArg(0));
1155    OS << '(';
1156    for (unsigned ArgIdx = 1; ArgIdx < Node->getNumArgs(); ++ArgIdx) {
1157      if (ArgIdx > 1)
1158        OS << ", ";
1159      if (!isa<CXXDefaultArgExpr>(Node->getArg(ArgIdx)))
1160        PrintExpr(Node->getArg(ArgIdx));
1161    }
1162    OS << ')';
1163  } else if (Kind == OO_Subscript) {
1164    PrintExpr(Node->getArg(0));
1165    OS << '[';
1166    PrintExpr(Node->getArg(1));
1167    OS << ']';
1168  } else if (Node->getNumArgs() == 1) {
1169    OS << OpStrings[Kind] << ' ';
1170    PrintExpr(Node->getArg(0));
1171  } else if (Node->getNumArgs() == 2) {
1172    PrintExpr(Node->getArg(0));
1173    OS << ' ' << OpStrings[Kind] << ' ';
1174    PrintExpr(Node->getArg(1));
1175  } else {
1176    llvm_unreachable("unknown overloaded operator");
1177  }
1178}
1179
1180void StmtPrinter::VisitCXXMemberCallExpr(CXXMemberCallExpr *Node) {
1181  VisitCallExpr(cast<CallExpr>(Node));
1182}
1183
1184void StmtPrinter::VisitCUDAKernelCallExpr(CUDAKernelCallExpr *Node) {
1185  PrintExpr(Node->getCallee());
1186  OS << "<<<";
1187  PrintCallArgs(Node->getConfig());
1188  OS << ">>>(";
1189  PrintCallArgs(Node);
1190  OS << ")";
1191}
1192
1193void StmtPrinter::VisitCXXNamedCastExpr(CXXNamedCastExpr *Node) {
1194  OS << Node->getCastName() << '<';
1195  OS << Node->getTypeAsWritten().getAsString(Policy) << ">(";
1196  PrintExpr(Node->getSubExpr());
1197  OS << ")";
1198}
1199
1200void StmtPrinter::VisitCXXStaticCastExpr(CXXStaticCastExpr *Node) {
1201  VisitCXXNamedCastExpr(Node);
1202}
1203
1204void StmtPrinter::VisitCXXDynamicCastExpr(CXXDynamicCastExpr *Node) {
1205  VisitCXXNamedCastExpr(Node);
1206}
1207
1208void StmtPrinter::VisitCXXReinterpretCastExpr(CXXReinterpretCastExpr *Node) {
1209  VisitCXXNamedCastExpr(Node);
1210}
1211
1212void StmtPrinter::VisitCXXConstCastExpr(CXXConstCastExpr *Node) {
1213  VisitCXXNamedCastExpr(Node);
1214}
1215
1216void StmtPrinter::VisitCXXTypeidExpr(CXXTypeidExpr *Node) {
1217  OS << "typeid(";
1218  if (Node->isTypeOperand()) {
1219    OS << Node->getTypeOperand().getAsString(Policy);
1220  } else {
1221    PrintExpr(Node->getExprOperand());
1222  }
1223  OS << ")";
1224}
1225
1226void StmtPrinter::VisitCXXUuidofExpr(CXXUuidofExpr *Node) {
1227  OS << "__uuidof(";
1228  if (Node->isTypeOperand()) {
1229    OS << Node->getTypeOperand().getAsString(Policy);
1230  } else {
1231    PrintExpr(Node->getExprOperand());
1232  }
1233  OS << ")";
1234}
1235
1236void StmtPrinter::VisitUserDefinedLiteral(UserDefinedLiteral *Node) {
1237  switch (Node->getLiteralOperatorKind()) {
1238  case UserDefinedLiteral::LOK_Raw:
1239    OS << cast<StringLiteral>(Node->getArg(0)->IgnoreImpCasts())->getString();
1240    break;
1241  case UserDefinedLiteral::LOK_Template: {
1242    DeclRefExpr *DRE = cast<DeclRefExpr>(Node->getCallee()->IgnoreImpCasts());
1243    const TemplateArgumentList *Args =
1244      cast<FunctionDecl>(DRE->getDecl())->getTemplateSpecializationArgs();
1245    assert(Args);
1246    const TemplateArgument &Pack = Args->get(0);
1247    for (TemplateArgument::pack_iterator I = Pack.pack_begin(),
1248                                         E = Pack.pack_end(); I != E; ++I) {
1249      char C = (char)I->getAsIntegral().getZExtValue();
1250      OS << C;
1251    }
1252    break;
1253  }
1254  case UserDefinedLiteral::LOK_Integer: {
1255    // Print integer literal without suffix.
1256    IntegerLiteral *Int = cast<IntegerLiteral>(Node->getCookedLiteral());
1257    OS << Int->getValue().toString(10, /*isSigned*/false);
1258    break;
1259  }
1260  case UserDefinedLiteral::LOK_Floating: {
1261    // Print floating literal without suffix.
1262    FloatingLiteral *Float = cast<FloatingLiteral>(Node->getCookedLiteral());
1263    PrintFloatingLiteral(OS, Float, /*PrintSuffix=*/false);
1264    break;
1265  }
1266  case UserDefinedLiteral::LOK_String:
1267  case UserDefinedLiteral::LOK_Character:
1268    PrintExpr(Node->getCookedLiteral());
1269    break;
1270  }
1271  OS << Node->getUDSuffix()->getName();
1272}
1273
1274void StmtPrinter::VisitCXXBoolLiteralExpr(CXXBoolLiteralExpr *Node) {
1275  OS << (Node->getValue() ? "true" : "false");
1276}
1277
1278void StmtPrinter::VisitCXXNullPtrLiteralExpr(CXXNullPtrLiteralExpr *Node) {
1279  OS << "nullptr";
1280}
1281
1282void StmtPrinter::VisitCXXThisExpr(CXXThisExpr *Node) {
1283  OS << "this";
1284}
1285
1286void StmtPrinter::VisitCXXThrowExpr(CXXThrowExpr *Node) {
1287  if (Node->getSubExpr() == 0)
1288    OS << "throw";
1289  else {
1290    OS << "throw ";
1291    PrintExpr(Node->getSubExpr());
1292  }
1293}
1294
1295void StmtPrinter::VisitCXXDefaultArgExpr(CXXDefaultArgExpr *Node) {
1296  // Nothing to print: we picked up the default argument
1297}
1298
1299void StmtPrinter::VisitCXXFunctionalCastExpr(CXXFunctionalCastExpr *Node) {
1300  OS << Node->getType().getAsString(Policy);
1301  OS << "(";
1302  PrintExpr(Node->getSubExpr());
1303  OS << ")";
1304}
1305
1306void StmtPrinter::VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *Node) {
1307  PrintExpr(Node->getSubExpr());
1308}
1309
1310void StmtPrinter::VisitCXXTemporaryObjectExpr(CXXTemporaryObjectExpr *Node) {
1311  OS << Node->getType().getAsString(Policy);
1312  OS << "(";
1313  for (CXXTemporaryObjectExpr::arg_iterator Arg = Node->arg_begin(),
1314                                         ArgEnd = Node->arg_end();
1315       Arg != ArgEnd; ++Arg) {
1316    if (Arg != Node->arg_begin())
1317      OS << ", ";
1318    PrintExpr(*Arg);
1319  }
1320  OS << ")";
1321}
1322
1323void StmtPrinter::VisitLambdaExpr(LambdaExpr *Node) {
1324  OS << '[';
1325  bool NeedComma = false;
1326  switch (Node->getCaptureDefault()) {
1327  case LCD_None:
1328    break;
1329
1330  case LCD_ByCopy:
1331    OS << '=';
1332    NeedComma = true;
1333    break;
1334
1335  case LCD_ByRef:
1336    OS << '&';
1337    NeedComma = true;
1338    break;
1339  }
1340  for (LambdaExpr::capture_iterator C = Node->explicit_capture_begin(),
1341                                 CEnd = Node->explicit_capture_end();
1342       C != CEnd;
1343       ++C) {
1344    if (NeedComma)
1345      OS << ", ";
1346    NeedComma = true;
1347
1348    switch (C->getCaptureKind()) {
1349    case LCK_This:
1350      OS << "this";
1351      break;
1352
1353    case LCK_ByRef:
1354      if (Node->getCaptureDefault() != LCD_ByRef)
1355        OS << '&';
1356      OS << C->getCapturedVar()->getName();
1357      break;
1358
1359    case LCK_ByCopy:
1360      if (Node->getCaptureDefault() != LCD_ByCopy)
1361        OS << '=';
1362      OS << C->getCapturedVar()->getName();
1363      break;
1364    }
1365  }
1366  OS << ']';
1367
1368  if (Node->hasExplicitParameters()) {
1369    OS << " (";
1370    CXXMethodDecl *Method = Node->getCallOperator();
1371    NeedComma = false;
1372    for (CXXMethodDecl::param_iterator P = Method->param_begin(),
1373                                    PEnd = Method->param_end();
1374         P != PEnd; ++P) {
1375      if (NeedComma) {
1376        OS << ", ";
1377      } else {
1378        NeedComma = true;
1379      }
1380      std::string ParamStr = (*P)->getNameAsString();
1381      (*P)->getOriginalType().getAsStringInternal(ParamStr, Policy);
1382      OS << ParamStr;
1383    }
1384    if (Method->isVariadic()) {
1385      if (NeedComma)
1386        OS << ", ";
1387      OS << "...";
1388    }
1389    OS << ')';
1390
1391    if (Node->isMutable())
1392      OS << " mutable";
1393
1394    const FunctionProtoType *Proto
1395      = Method->getType()->getAs<FunctionProtoType>();
1396    {
1397      std::string ExceptionSpec;
1398      Proto->printExceptionSpecification(ExceptionSpec, Policy);
1399      OS << ExceptionSpec;
1400    }
1401
1402    // FIXME: Attributes
1403
1404    // Print the trailing return type if it was specified in the source.
1405    if (Node->hasExplicitResultType())
1406      OS << " -> " << Proto->getResultType().getAsString(Policy);
1407  }
1408
1409  // Print the body.
1410  CompoundStmt *Body = Node->getBody();
1411  OS << ' ';
1412  PrintStmt(Body);
1413}
1414
1415void StmtPrinter::VisitCXXScalarValueInitExpr(CXXScalarValueInitExpr *Node) {
1416  if (TypeSourceInfo *TSInfo = Node->getTypeSourceInfo())
1417    OS << TSInfo->getType().getAsString(Policy) << "()";
1418  else
1419    OS << Node->getType().getAsString(Policy) << "()";
1420}
1421
1422void StmtPrinter::VisitCXXNewExpr(CXXNewExpr *E) {
1423  if (E->isGlobalNew())
1424    OS << "::";
1425  OS << "new ";
1426  unsigned NumPlace = E->getNumPlacementArgs();
1427  if (NumPlace > 0 && !isa<CXXDefaultArgExpr>(E->getPlacementArg(0))) {
1428    OS << "(";
1429    PrintExpr(E->getPlacementArg(0));
1430    for (unsigned i = 1; i < NumPlace; ++i) {
1431      if (isa<CXXDefaultArgExpr>(E->getPlacementArg(i)))
1432        break;
1433      OS << ", ";
1434      PrintExpr(E->getPlacementArg(i));
1435    }
1436    OS << ") ";
1437  }
1438  if (E->isParenTypeId())
1439    OS << "(";
1440  std::string TypeS;
1441  if (Expr *Size = E->getArraySize()) {
1442    llvm::raw_string_ostream s(TypeS);
1443    Size->printPretty(s, Helper, Policy);
1444    s.flush();
1445    TypeS = "[" + TypeS + "]";
1446  }
1447  E->getAllocatedType().getAsStringInternal(TypeS, Policy);
1448  OS << TypeS;
1449  if (E->isParenTypeId())
1450    OS << ")";
1451
1452  CXXNewExpr::InitializationStyle InitStyle = E->getInitializationStyle();
1453  if (InitStyle) {
1454    if (InitStyle == CXXNewExpr::CallInit)
1455      OS << "(";
1456    PrintExpr(E->getInitializer());
1457    if (InitStyle == CXXNewExpr::CallInit)
1458      OS << ")";
1459  }
1460}
1461
1462void StmtPrinter::VisitCXXDeleteExpr(CXXDeleteExpr *E) {
1463  if (E->isGlobalDelete())
1464    OS << "::";
1465  OS << "delete ";
1466  if (E->isArrayForm())
1467    OS << "[] ";
1468  PrintExpr(E->getArgument());
1469}
1470
1471void StmtPrinter::VisitCXXPseudoDestructorExpr(CXXPseudoDestructorExpr *E) {
1472  PrintExpr(E->getBase());
1473  if (E->isArrow())
1474    OS << "->";
1475  else
1476    OS << '.';
1477  if (E->getQualifier())
1478    E->getQualifier()->print(OS, Policy);
1479  OS << "~";
1480
1481  std::string TypeS;
1482  if (IdentifierInfo *II = E->getDestroyedTypeIdentifier())
1483    OS << II->getName();
1484  else
1485    E->getDestroyedType().getAsStringInternal(TypeS, Policy);
1486  OS << TypeS;
1487}
1488
1489void StmtPrinter::VisitCXXConstructExpr(CXXConstructExpr *E) {
1490  for (unsigned i = 0, e = E->getNumArgs(); i != e; ++i) {
1491    if (isa<CXXDefaultArgExpr>(E->getArg(i))) {
1492      // Don't print any defaulted arguments
1493      break;
1494    }
1495
1496    if (i) OS << ", ";
1497    PrintExpr(E->getArg(i));
1498  }
1499}
1500
1501void StmtPrinter::VisitExprWithCleanups(ExprWithCleanups *E) {
1502  // Just forward to the sub expression.
1503  PrintExpr(E->getSubExpr());
1504}
1505
1506void
1507StmtPrinter::VisitCXXUnresolvedConstructExpr(
1508                                           CXXUnresolvedConstructExpr *Node) {
1509  OS << Node->getTypeAsWritten().getAsString(Policy);
1510  OS << "(";
1511  for (CXXUnresolvedConstructExpr::arg_iterator Arg = Node->arg_begin(),
1512                                             ArgEnd = Node->arg_end();
1513       Arg != ArgEnd; ++Arg) {
1514    if (Arg != Node->arg_begin())
1515      OS << ", ";
1516    PrintExpr(*Arg);
1517  }
1518  OS << ")";
1519}
1520
1521void StmtPrinter::VisitCXXDependentScopeMemberExpr(
1522                                         CXXDependentScopeMemberExpr *Node) {
1523  if (!Node->isImplicitAccess()) {
1524    PrintExpr(Node->getBase());
1525    OS << (Node->isArrow() ? "->" : ".");
1526  }
1527  if (NestedNameSpecifier *Qualifier = Node->getQualifier())
1528    Qualifier->print(OS, Policy);
1529  if (Node->hasTemplateKeyword())
1530    OS << "template ";
1531  OS << Node->getMemberNameInfo();
1532  if (Node->hasExplicitTemplateArgs()) {
1533    OS << TemplateSpecializationType::PrintTemplateArgumentList(
1534                                                    Node->getTemplateArgs(),
1535                                                    Node->getNumTemplateArgs(),
1536                                                    Policy);
1537  }
1538}
1539
1540void StmtPrinter::VisitUnresolvedMemberExpr(UnresolvedMemberExpr *Node) {
1541  if (!Node->isImplicitAccess()) {
1542    PrintExpr(Node->getBase());
1543    OS << (Node->isArrow() ? "->" : ".");
1544  }
1545  if (NestedNameSpecifier *Qualifier = Node->getQualifier())
1546    Qualifier->print(OS, Policy);
1547  if (Node->hasTemplateKeyword())
1548    OS << "template ";
1549  OS << Node->getMemberNameInfo();
1550  if (Node->hasExplicitTemplateArgs()) {
1551    OS << TemplateSpecializationType::PrintTemplateArgumentList(
1552                                                    Node->getTemplateArgs(),
1553                                                    Node->getNumTemplateArgs(),
1554                                                    Policy);
1555  }
1556}
1557
1558static const char *getTypeTraitName(UnaryTypeTrait UTT) {
1559  switch (UTT) {
1560  case UTT_HasNothrowAssign:      return "__has_nothrow_assign";
1561  case UTT_HasNothrowConstructor: return "__has_nothrow_constructor";
1562  case UTT_HasNothrowCopy:          return "__has_nothrow_copy";
1563  case UTT_HasTrivialAssign:      return "__has_trivial_assign";
1564  case UTT_HasTrivialDefaultConstructor: return "__has_trivial_constructor";
1565  case UTT_HasTrivialCopy:          return "__has_trivial_copy";
1566  case UTT_HasTrivialDestructor:  return "__has_trivial_destructor";
1567  case UTT_HasVirtualDestructor:  return "__has_virtual_destructor";
1568  case UTT_IsAbstract:            return "__is_abstract";
1569  case UTT_IsArithmetic:            return "__is_arithmetic";
1570  case UTT_IsArray:                 return "__is_array";
1571  case UTT_IsClass:               return "__is_class";
1572  case UTT_IsCompleteType:          return "__is_complete_type";
1573  case UTT_IsCompound:              return "__is_compound";
1574  case UTT_IsConst:                 return "__is_const";
1575  case UTT_IsEmpty:               return "__is_empty";
1576  case UTT_IsEnum:                return "__is_enum";
1577  case UTT_IsFinal:                 return "__is_final";
1578  case UTT_IsFloatingPoint:         return "__is_floating_point";
1579  case UTT_IsFunction:              return "__is_function";
1580  case UTT_IsFundamental:           return "__is_fundamental";
1581  case UTT_IsIntegral:              return "__is_integral";
1582  case UTT_IsInterfaceClass:        return "__is_interface_class";
1583  case UTT_IsLiteral:               return "__is_literal";
1584  case UTT_IsLvalueReference:       return "__is_lvalue_reference";
1585  case UTT_IsMemberFunctionPointer: return "__is_member_function_pointer";
1586  case UTT_IsMemberObjectPointer:   return "__is_member_object_pointer";
1587  case UTT_IsMemberPointer:         return "__is_member_pointer";
1588  case UTT_IsObject:                return "__is_object";
1589  case UTT_IsPOD:                 return "__is_pod";
1590  case UTT_IsPointer:               return "__is_pointer";
1591  case UTT_IsPolymorphic:         return "__is_polymorphic";
1592  case UTT_IsReference:             return "__is_reference";
1593  case UTT_IsRvalueReference:       return "__is_rvalue_reference";
1594  case UTT_IsScalar:                return "__is_scalar";
1595  case UTT_IsSigned:                return "__is_signed";
1596  case UTT_IsStandardLayout:        return "__is_standard_layout";
1597  case UTT_IsTrivial:               return "__is_trivial";
1598  case UTT_IsTriviallyCopyable:     return "__is_trivially_copyable";
1599  case UTT_IsUnion:               return "__is_union";
1600  case UTT_IsUnsigned:              return "__is_unsigned";
1601  case UTT_IsVoid:                  return "__is_void";
1602  case UTT_IsVolatile:              return "__is_volatile";
1603  }
1604  llvm_unreachable("Type trait not covered by switch statement");
1605}
1606
1607static const char *getTypeTraitName(BinaryTypeTrait BTT) {
1608  switch (BTT) {
1609  case BTT_IsBaseOf:              return "__is_base_of";
1610  case BTT_IsConvertible:         return "__is_convertible";
1611  case BTT_IsSame:                return "__is_same";
1612  case BTT_TypeCompatible:        return "__builtin_types_compatible_p";
1613  case BTT_IsConvertibleTo:       return "__is_convertible_to";
1614  case BTT_IsTriviallyAssignable: return "__is_trivially_assignable";
1615  }
1616  llvm_unreachable("Binary type trait not covered by switch");
1617}
1618
1619static const char *getTypeTraitName(TypeTrait TT) {
1620  switch (TT) {
1621  case clang::TT_IsTriviallyConstructible:return "__is_trivially_constructible";
1622  }
1623  llvm_unreachable("Type trait not covered by switch");
1624}
1625
1626static const char *getTypeTraitName(ArrayTypeTrait ATT) {
1627  switch (ATT) {
1628  case ATT_ArrayRank:        return "__array_rank";
1629  case ATT_ArrayExtent:      return "__array_extent";
1630  }
1631  llvm_unreachable("Array type trait not covered by switch");
1632}
1633
1634static const char *getExpressionTraitName(ExpressionTrait ET) {
1635  switch (ET) {
1636  case ET_IsLValueExpr:      return "__is_lvalue_expr";
1637  case ET_IsRValueExpr:      return "__is_rvalue_expr";
1638  }
1639  llvm_unreachable("Expression type trait not covered by switch");
1640}
1641
1642void StmtPrinter::VisitUnaryTypeTraitExpr(UnaryTypeTraitExpr *E) {
1643  OS << getTypeTraitName(E->getTrait()) << "("
1644     << E->getQueriedType().getAsString(Policy) << ")";
1645}
1646
1647void StmtPrinter::VisitBinaryTypeTraitExpr(BinaryTypeTraitExpr *E) {
1648  OS << getTypeTraitName(E->getTrait()) << "("
1649     << E->getLhsType().getAsString(Policy) << ","
1650     << E->getRhsType().getAsString(Policy) << ")";
1651}
1652
1653void StmtPrinter::VisitTypeTraitExpr(TypeTraitExpr *E) {
1654  OS << getTypeTraitName(E->getTrait()) << "(";
1655  for (unsigned I = 0, N = E->getNumArgs(); I != N; ++I) {
1656    if (I > 0)
1657      OS << ", ";
1658    OS << E->getArg(I)->getType().getAsString(Policy);
1659  }
1660  OS << ")";
1661}
1662
1663void StmtPrinter::VisitArrayTypeTraitExpr(ArrayTypeTraitExpr *E) {
1664  OS << getTypeTraitName(E->getTrait()) << "("
1665     << E->getQueriedType().getAsString(Policy) << ")";
1666}
1667
1668void StmtPrinter::VisitExpressionTraitExpr(ExpressionTraitExpr *E) {
1669    OS << getExpressionTraitName(E->getTrait()) << "(";
1670    PrintExpr(E->getQueriedExpression());
1671    OS << ")";
1672}
1673
1674void StmtPrinter::VisitCXXNoexceptExpr(CXXNoexceptExpr *E) {
1675  OS << "noexcept(";
1676  PrintExpr(E->getOperand());
1677  OS << ")";
1678}
1679
1680void StmtPrinter::VisitPackExpansionExpr(PackExpansionExpr *E) {
1681  PrintExpr(E->getPattern());
1682  OS << "...";
1683}
1684
1685void StmtPrinter::VisitSizeOfPackExpr(SizeOfPackExpr *E) {
1686  OS << "sizeof...(" << *E->getPack() << ")";
1687}
1688
1689void StmtPrinter::VisitSubstNonTypeTemplateParmPackExpr(
1690                                       SubstNonTypeTemplateParmPackExpr *Node) {
1691  OS << *Node->getParameterPack();
1692}
1693
1694void StmtPrinter::VisitSubstNonTypeTemplateParmExpr(
1695                                       SubstNonTypeTemplateParmExpr *Node) {
1696  Visit(Node->getReplacement());
1697}
1698
1699void StmtPrinter::VisitFunctionParmPackExpr(FunctionParmPackExpr *E) {
1700  OS << *E->getParameterPack();
1701}
1702
1703void StmtPrinter::VisitMaterializeTemporaryExpr(MaterializeTemporaryExpr *Node){
1704  PrintExpr(Node->GetTemporaryExpr());
1705}
1706
1707// Obj-C
1708
1709void StmtPrinter::VisitObjCStringLiteral(ObjCStringLiteral *Node) {
1710  OS << "@";
1711  VisitStringLiteral(Node->getString());
1712}
1713
1714void StmtPrinter::VisitObjCBoxedExpr(ObjCBoxedExpr *E) {
1715  OS << "@";
1716  Visit(E->getSubExpr());
1717}
1718
1719void StmtPrinter::VisitObjCArrayLiteral(ObjCArrayLiteral *E) {
1720  OS << "@[ ";
1721  StmtRange ch = E->children();
1722  if (ch.first != ch.second) {
1723    while (1) {
1724      Visit(*ch.first);
1725      ++ch.first;
1726      if (ch.first == ch.second) break;
1727      OS << ", ";
1728    }
1729  }
1730  OS << " ]";
1731}
1732
1733void StmtPrinter::VisitObjCDictionaryLiteral(ObjCDictionaryLiteral *E) {
1734  OS << "@{ ";
1735  for (unsigned I = 0, N = E->getNumElements(); I != N; ++I) {
1736    if (I > 0)
1737      OS << ", ";
1738
1739    ObjCDictionaryElement Element = E->getKeyValueElement(I);
1740    Visit(Element.Key);
1741    OS << " : ";
1742    Visit(Element.Value);
1743    if (Element.isPackExpansion())
1744      OS << "...";
1745  }
1746  OS << " }";
1747}
1748
1749void StmtPrinter::VisitObjCEncodeExpr(ObjCEncodeExpr *Node) {
1750  OS << "@encode(" << Node->getEncodedType().getAsString(Policy) << ')';
1751}
1752
1753void StmtPrinter::VisitObjCSelectorExpr(ObjCSelectorExpr *Node) {
1754  OS << "@selector(" << Node->getSelector().getAsString() << ')';
1755}
1756
1757void StmtPrinter::VisitObjCProtocolExpr(ObjCProtocolExpr *Node) {
1758  OS << "@protocol(" << *Node->getProtocol() << ')';
1759}
1760
1761void StmtPrinter::VisitObjCMessageExpr(ObjCMessageExpr *Mess) {
1762  OS << "[";
1763  switch (Mess->getReceiverKind()) {
1764  case ObjCMessageExpr::Instance:
1765    PrintExpr(Mess->getInstanceReceiver());
1766    break;
1767
1768  case ObjCMessageExpr::Class:
1769    OS << Mess->getClassReceiver().getAsString(Policy);
1770    break;
1771
1772  case ObjCMessageExpr::SuperInstance:
1773  case ObjCMessageExpr::SuperClass:
1774    OS << "Super";
1775    break;
1776  }
1777
1778  OS << ' ';
1779  Selector selector = Mess->getSelector();
1780  if (selector.isUnarySelector()) {
1781    OS << selector.getNameForSlot(0);
1782  } else {
1783    for (unsigned i = 0, e = Mess->getNumArgs(); i != e; ++i) {
1784      if (i < selector.getNumArgs()) {
1785        if (i > 0) OS << ' ';
1786        if (selector.getIdentifierInfoForSlot(i))
1787          OS << selector.getIdentifierInfoForSlot(i)->getName() << ':';
1788        else
1789           OS << ":";
1790      }
1791      else OS << ", "; // Handle variadic methods.
1792
1793      PrintExpr(Mess->getArg(i));
1794    }
1795  }
1796  OS << "]";
1797}
1798
1799void StmtPrinter::VisitObjCBoolLiteralExpr(ObjCBoolLiteralExpr *Node) {
1800  OS << (Node->getValue() ? "__objc_yes" : "__objc_no");
1801}
1802
1803void
1804StmtPrinter::VisitObjCIndirectCopyRestoreExpr(ObjCIndirectCopyRestoreExpr *E) {
1805  PrintExpr(E->getSubExpr());
1806}
1807
1808void
1809StmtPrinter::VisitObjCBridgedCastExpr(ObjCBridgedCastExpr *E) {
1810  OS << "(" << E->getBridgeKindName() << E->getType().getAsString(Policy)
1811     << ")";
1812  PrintExpr(E->getSubExpr());
1813}
1814
1815void StmtPrinter::VisitBlockExpr(BlockExpr *Node) {
1816  BlockDecl *BD = Node->getBlockDecl();
1817  OS << "^";
1818
1819  const FunctionType *AFT = Node->getFunctionType();
1820
1821  if (isa<FunctionNoProtoType>(AFT)) {
1822    OS << "()";
1823  } else if (!BD->param_empty() || cast<FunctionProtoType>(AFT)->isVariadic()) {
1824    OS << '(';
1825    std::string ParamStr;
1826    for (BlockDecl::param_iterator AI = BD->param_begin(),
1827         E = BD->param_end(); AI != E; ++AI) {
1828      if (AI != BD->param_begin()) OS << ", ";
1829      ParamStr = (*AI)->getNameAsString();
1830      (*AI)->getType().getAsStringInternal(ParamStr, Policy);
1831      OS << ParamStr;
1832    }
1833
1834    const FunctionProtoType *FT = cast<FunctionProtoType>(AFT);
1835    if (FT->isVariadic()) {
1836      if (!BD->param_empty()) OS << ", ";
1837      OS << "...";
1838    }
1839    OS << ')';
1840  }
1841  OS << "{ }";
1842}
1843
1844void StmtPrinter::VisitOpaqueValueExpr(OpaqueValueExpr *Node) {
1845  PrintExpr(Node->getSourceExpr());
1846}
1847
1848void StmtPrinter::VisitAsTypeExpr(AsTypeExpr *Node) {
1849  OS << "__builtin_astype(";
1850  PrintExpr(Node->getSrcExpr());
1851  OS << ", " << Node->getType().getAsString();
1852  OS << ")";
1853}
1854
1855//===----------------------------------------------------------------------===//
1856// Stmt method implementations
1857//===----------------------------------------------------------------------===//
1858
1859void Stmt::dumpPretty(ASTContext &Context) const {
1860  printPretty(llvm::errs(), 0, PrintingPolicy(Context.getLangOpts()));
1861}
1862
1863void Stmt::printPretty(raw_ostream &OS,
1864                       PrinterHelper *Helper,
1865                       const PrintingPolicy &Policy,
1866                       unsigned Indentation) const {
1867  if (this == 0) {
1868    OS << "<NULL>";
1869    return;
1870  }
1871
1872  if (Policy.DumpSourceManager) {
1873    dump(OS, *Policy.DumpSourceManager);
1874    return;
1875  }
1876
1877  StmtPrinter P(OS, Helper, Policy, Indentation);
1878  P.Visit(const_cast<Stmt*>(this));
1879}
1880
1881//===----------------------------------------------------------------------===//
1882// PrinterHelper
1883//===----------------------------------------------------------------------===//
1884
1885// Implement virtual destructor.
1886PrinterHelper::~PrinterHelper() {}
1887