StmtPrinter.cpp revision 0016d519b831859526b79405cdae4c64c73731c8 
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/StmtVisitor.h"
16#include "clang/AST/DeclCXX.h"
17#include "clang/AST/DeclObjC.h"
18#include "clang/AST/PrettyPrinter.h"
19#include "llvm/Support/Format.h"
20#include "clang/AST/Expr.h"
21using namespace clang;
22
23//===----------------------------------------------------------------------===//
24// StmtPrinter Visitor
25//===----------------------------------------------------------------------===//
26
27namespace  {
28  class StmtPrinter : public StmtVisitor<StmtPrinter> {
29    llvm::raw_ostream &OS;
30    ASTContext &Context;
31    unsigned IndentLevel;
32    clang::PrinterHelper* Helper;
33    PrintingPolicy Policy;
34
35  public:
36    StmtPrinter(llvm::raw_ostream &os, ASTContext &C, PrinterHelper* helper,
37                const PrintingPolicy &Policy,
38                unsigned Indentation = 0)
39      : OS(os), Context(C), IndentLevel(Indentation), Helper(helper),
40        Policy(Policy) {}
41
42    void PrintStmt(Stmt *S) {
43      PrintStmt(S, Policy.Indentation);
44    }
45
46    void PrintStmt(Stmt *S, int SubIndent) {
47      IndentLevel += SubIndent;
48      if (S && isa<Expr>(S)) {
49        // If this is an expr used in a stmt context, indent and newline it.
50        Indent();
51        Visit(S);
52        OS << ";\n";
53      } else if (S) {
54        Visit(S);
55      } else {
56        Indent() << "<<<NULL STATEMENT>>>\n";
57      }
58      IndentLevel -= SubIndent;
59    }
60
61    void PrintRawCompoundStmt(CompoundStmt *S);
62    void PrintRawDecl(Decl *D);
63    void PrintRawDeclStmt(DeclStmt *S);
64    void PrintRawIfStmt(IfStmt *If);
65    void PrintRawCXXCatchStmt(CXXCatchStmt *Catch);
66
67    void PrintExpr(Expr *E) {
68      if (E)
69        Visit(E);
70      else
71        OS << "<null expr>";
72    }
73
74    llvm::raw_ostream &Indent(int Delta = 0) {
75      for (int i = 0, e = IndentLevel+Delta; i < e; ++i)
76        OS << "  ";
77      return OS;
78    }
79
80    void Visit(Stmt* S) {
81      if (Helper && Helper->handledStmt(S,OS))
82          return;
83      else StmtVisitor<StmtPrinter>::Visit(S);
84    }
85
86    void VisitStmt(Stmt *Node) ATTRIBUTE_UNUSED {
87      Indent() << "<<unknown stmt type>>\n";
88    }
89    void VisitExpr(Expr *Node) ATTRIBUTE_UNUSED {
90      OS << "<<unknown expr type>>";
91    }
92    void VisitCXXNamedCastExpr(CXXNamedCastExpr *Node);
93
94#define ABSTRACT_STMT(CLASS)
95#define STMT(CLASS, PARENT) \
96    void Visit##CLASS(CLASS *Node);
97#include "clang/AST/StmtNodes.inc"
98  };
99}
100
101//===----------------------------------------------------------------------===//
102//  Stmt printing methods.
103//===----------------------------------------------------------------------===//
104
105/// PrintRawCompoundStmt - Print a compound stmt without indenting the {, and
106/// with no newline after the }.
107void StmtPrinter::PrintRawCompoundStmt(CompoundStmt *Node) {
108  OS << "{\n";
109  for (CompoundStmt::body_iterator I = Node->body_begin(), E = Node->body_end();
110       I != E; ++I)
111    PrintStmt(*I);
112
113  Indent() << "}";
114}
115
116void StmtPrinter::PrintRawDecl(Decl *D) {
117  D->print(OS, Policy, IndentLevel);
118}
119
120void StmtPrinter::PrintRawDeclStmt(DeclStmt *S) {
121  DeclStmt::decl_iterator Begin = S->decl_begin(), End = S->decl_end();
122  llvm::SmallVector<Decl*, 2> Decls;
123  for ( ; Begin != End; ++Begin)
124    Decls.push_back(*Begin);
125
126  Decl::printGroup(Decls.data(), Decls.size(), OS, Policy, IndentLevel);
127}
128
129void StmtPrinter::VisitNullStmt(NullStmt *Node) {
130  Indent() << ";\n";
131}
132
133void StmtPrinter::VisitDeclStmt(DeclStmt *Node) {
134  Indent();
135  PrintRawDeclStmt(Node);
136  OS << ";\n";
137}
138
139void StmtPrinter::VisitCompoundStmt(CompoundStmt *Node) {
140  Indent();
141  PrintRawCompoundStmt(Node);
142  OS << "\n";
143}
144
145void StmtPrinter::VisitCaseStmt(CaseStmt *Node) {
146  Indent(-1) << "case ";
147  PrintExpr(Node->getLHS());
148  if (Node->getRHS()) {
149    OS << " ... ";
150    PrintExpr(Node->getRHS());
151  }
152  OS << ":\n";
153
154  PrintStmt(Node->getSubStmt(), 0);
155}
156
157void StmtPrinter::VisitDefaultStmt(DefaultStmt *Node) {
158  Indent(-1) << "default:\n";
159  PrintStmt(Node->getSubStmt(), 0);
160}
161
162void StmtPrinter::VisitLabelStmt(LabelStmt *Node) {
163  Indent(-1) << Node->getName() << ":\n";
164  PrintStmt(Node->getSubStmt(), 0);
165}
166
167void StmtPrinter::PrintRawIfStmt(IfStmt *If) {
168  OS << "if (";
169  PrintExpr(If->getCond());
170  OS << ')';
171
172  if (CompoundStmt *CS = dyn_cast<CompoundStmt>(If->getThen())) {
173    OS << ' ';
174    PrintRawCompoundStmt(CS);
175    OS << (If->getElse() ? ' ' : '\n');
176  } else {
177    OS << '\n';
178    PrintStmt(If->getThen());
179    if (If->getElse()) Indent();
180  }
181
182  if (Stmt *Else = If->getElse()) {
183    OS << "else";
184
185    if (CompoundStmt *CS = dyn_cast<CompoundStmt>(Else)) {
186      OS << ' ';
187      PrintRawCompoundStmt(CS);
188      OS << '\n';
189    } else if (IfStmt *ElseIf = dyn_cast<IfStmt>(Else)) {
190      OS << ' ';
191      PrintRawIfStmt(ElseIf);
192    } else {
193      OS << '\n';
194      PrintStmt(If->getElse());
195    }
196  }
197}
198
199void StmtPrinter::VisitIfStmt(IfStmt *If) {
200  Indent();
201  PrintRawIfStmt(If);
202}
203
204void StmtPrinter::VisitSwitchStmt(SwitchStmt *Node) {
205  Indent() << "switch (";
206  PrintExpr(Node->getCond());
207  OS << ")";
208
209  // Pretty print compoundstmt bodies (very common).
210  if (CompoundStmt *CS = dyn_cast<CompoundStmt>(Node->getBody())) {
211    OS << " ";
212    PrintRawCompoundStmt(CS);
213    OS << "\n";
214  } else {
215    OS << "\n";
216    PrintStmt(Node->getBody());
217  }
218}
219
220void StmtPrinter::VisitSwitchCase(SwitchCase*) {
221  assert(0 && "SwitchCase is an abstract class");
222}
223
224void StmtPrinter::VisitWhileStmt(WhileStmt *Node) {
225  Indent() << "while (";
226  PrintExpr(Node->getCond());
227  OS << ")\n";
228  PrintStmt(Node->getBody());
229}
230
231void StmtPrinter::VisitDoStmt(DoStmt *Node) {
232  Indent() << "do ";
233  if (CompoundStmt *CS = dyn_cast<CompoundStmt>(Node->getBody())) {
234    PrintRawCompoundStmt(CS);
235    OS << " ";
236  } else {
237    OS << "\n";
238    PrintStmt(Node->getBody());
239    Indent();
240  }
241
242  OS << "while (";
243  PrintExpr(Node->getCond());
244  OS << ");\n";
245}
246
247void StmtPrinter::VisitForStmt(ForStmt *Node) {
248  Indent() << "for (";
249  if (Node->getInit()) {
250    if (DeclStmt *DS = dyn_cast<DeclStmt>(Node->getInit()))
251      PrintRawDeclStmt(DS);
252    else
253      PrintExpr(cast<Expr>(Node->getInit()));
254  }
255  OS << ";";
256  if (Node->getCond()) {
257    OS << " ";
258    PrintExpr(Node->getCond());
259  }
260  OS << ";";
261  if (Node->getInc()) {
262    OS << " ";
263    PrintExpr(Node->getInc());
264  }
265  OS << ") ";
266
267  if (CompoundStmt *CS = dyn_cast<CompoundStmt>(Node->getBody())) {
268    PrintRawCompoundStmt(CS);
269    OS << "\n";
270  } else {
271    OS << "\n";
272    PrintStmt(Node->getBody());
273  }
274}
275
276void StmtPrinter::VisitObjCForCollectionStmt(ObjCForCollectionStmt *Node) {
277  Indent() << "for (";
278  if (DeclStmt *DS = dyn_cast<DeclStmt>(Node->getElement()))
279    PrintRawDeclStmt(DS);
280  else
281    PrintExpr(cast<Expr>(Node->getElement()));
282  OS << " in ";
283  PrintExpr(Node->getCollection());
284  OS << ") ";
285
286  if (CompoundStmt *CS = dyn_cast<CompoundStmt>(Node->getBody())) {
287    PrintRawCompoundStmt(CS);
288    OS << "\n";
289  } else {
290    OS << "\n";
291    PrintStmt(Node->getBody());
292  }
293}
294
295void StmtPrinter::VisitGotoStmt(GotoStmt *Node) {
296  Indent() << "goto " << Node->getLabel()->getName() << ";\n";
297}
298
299void StmtPrinter::VisitIndirectGotoStmt(IndirectGotoStmt *Node) {
300  Indent() << "goto *";
301  PrintExpr(Node->getTarget());
302  OS << ";\n";
303}
304
305void StmtPrinter::VisitContinueStmt(ContinueStmt *Node) {
306  Indent() << "continue;\n";
307}
308
309void StmtPrinter::VisitBreakStmt(BreakStmt *Node) {
310  Indent() << "break;\n";
311}
312
313
314void StmtPrinter::VisitReturnStmt(ReturnStmt *Node) {
315  Indent() << "return";
316  if (Node->getRetValue()) {
317    OS << " ";
318    PrintExpr(Node->getRetValue());
319  }
320  OS << ";\n";
321}
322
323
324void StmtPrinter::VisitAsmStmt(AsmStmt *Node) {
325  Indent() << "asm ";
326
327  if (Node->isVolatile())
328    OS << "volatile ";
329
330  OS << "(";
331  VisitStringLiteral(Node->getAsmString());
332
333  // Outputs
334  if (Node->getNumOutputs() != 0 || Node->getNumInputs() != 0 ||
335      Node->getNumClobbers() != 0)
336    OS << " : ";
337
338  for (unsigned i = 0, e = Node->getNumOutputs(); i != e; ++i) {
339    if (i != 0)
340      OS << ", ";
341
342    if (!Node->getOutputName(i).empty()) {
343      OS << '[';
344      OS << Node->getOutputName(i);
345      OS << "] ";
346    }
347
348    VisitStringLiteral(Node->getOutputConstraintLiteral(i));
349    OS << " ";
350    Visit(Node->getOutputExpr(i));
351  }
352
353  // Inputs
354  if (Node->getNumInputs() != 0 || Node->getNumClobbers() != 0)
355    OS << " : ";
356
357  for (unsigned i = 0, e = Node->getNumInputs(); i != e; ++i) {
358    if (i != 0)
359      OS << ", ";
360
361    if (!Node->getInputName(i).empty()) {
362      OS << '[';
363      OS << Node->getInputName(i);
364      OS << "] ";
365    }
366
367    VisitStringLiteral(Node->getInputConstraintLiteral(i));
368    OS << " ";
369    Visit(Node->getInputExpr(i));
370  }
371
372  // Clobbers
373  if (Node->getNumClobbers() != 0)
374    OS << " : ";
375
376  for (unsigned i = 0, e = Node->getNumClobbers(); i != e; ++i) {
377    if (i != 0)
378      OS << ", ";
379
380    VisitStringLiteral(Node->getClobber(i));
381  }
382
383  OS << ");\n";
384}
385
386void StmtPrinter::VisitObjCAtTryStmt(ObjCAtTryStmt *Node) {
387  Indent() << "@try";
388  if (CompoundStmt *TS = dyn_cast<CompoundStmt>(Node->getTryBody())) {
389    PrintRawCompoundStmt(TS);
390    OS << "\n";
391  }
392
393  for (unsigned I = 0, N = Node->getNumCatchStmts(); I != N; ++I) {
394    ObjCAtCatchStmt *catchStmt = Node->getCatchStmt(I);
395    Indent() << "@catch(";
396    if (catchStmt->getCatchParamDecl()) {
397      if (Decl *DS = catchStmt->getCatchParamDecl())
398        PrintRawDecl(DS);
399    }
400    OS << ")";
401    if (CompoundStmt *CS = dyn_cast<CompoundStmt>(catchStmt->getCatchBody())) {
402      PrintRawCompoundStmt(CS);
403      OS << "\n";
404    }
405  }
406
407  if (ObjCAtFinallyStmt *FS = static_cast<ObjCAtFinallyStmt *>(
408        Node->getFinallyStmt())) {
409    Indent() << "@finally";
410    PrintRawCompoundStmt(dyn_cast<CompoundStmt>(FS->getFinallyBody()));
411    OS << "\n";
412  }
413}
414
415void StmtPrinter::VisitObjCAtFinallyStmt(ObjCAtFinallyStmt *Node) {
416}
417
418void StmtPrinter::VisitObjCAtCatchStmt (ObjCAtCatchStmt *Node) {
419  Indent() << "@catch (...) { /* todo */ } \n";
420}
421
422void StmtPrinter::VisitObjCAtThrowStmt(ObjCAtThrowStmt *Node) {
423  Indent() << "@throw";
424  if (Node->getThrowExpr()) {
425    OS << " ";
426    PrintExpr(Node->getThrowExpr());
427  }
428  OS << ";\n";
429}
430
431void StmtPrinter::VisitObjCAtSynchronizedStmt(ObjCAtSynchronizedStmt *Node) {
432  Indent() << "@synchronized (";
433  PrintExpr(Node->getSynchExpr());
434  OS << ")";
435  PrintRawCompoundStmt(Node->getSynchBody());
436  OS << "\n";
437}
438
439void StmtPrinter::PrintRawCXXCatchStmt(CXXCatchStmt *Node) {
440  OS << "catch (";
441  if (Decl *ExDecl = Node->getExceptionDecl())
442    PrintRawDecl(ExDecl);
443  else
444    OS << "...";
445  OS << ") ";
446  PrintRawCompoundStmt(cast<CompoundStmt>(Node->getHandlerBlock()));
447}
448
449void StmtPrinter::VisitCXXCatchStmt(CXXCatchStmt *Node) {
450  Indent();
451  PrintRawCXXCatchStmt(Node);
452  OS << "\n";
453}
454
455void StmtPrinter::VisitCXXTryStmt(CXXTryStmt *Node) {
456  Indent() << "try ";
457  PrintRawCompoundStmt(Node->getTryBlock());
458  for (unsigned i = 0, e = Node->getNumHandlers(); i < e; ++i) {
459    OS << " ";
460    PrintRawCXXCatchStmt(Node->getHandler(i));
461  }
462  OS << "\n";
463}
464
465//===----------------------------------------------------------------------===//
466//  Expr printing methods.
467//===----------------------------------------------------------------------===//
468
469void StmtPrinter::VisitDeclRefExpr(DeclRefExpr *Node) {
470  if (NestedNameSpecifier *Qualifier = Node->getQualifier())
471    Qualifier->print(OS, Policy);
472  OS << Node->getNameInfo();
473  if (Node->hasExplicitTemplateArgs())
474    OS << TemplateSpecializationType::PrintTemplateArgumentList(
475                                                    Node->getTemplateArgs(),
476                                                    Node->getNumTemplateArgs(),
477                                                    Policy);
478}
479
480void StmtPrinter::VisitDependentScopeDeclRefExpr(
481                                           DependentScopeDeclRefExpr *Node) {
482  Node->getQualifier()->print(OS, Policy);
483  OS << Node->getNameInfo();
484  if (Node->hasExplicitTemplateArgs())
485    OS << TemplateSpecializationType::PrintTemplateArgumentList(
486                                                   Node->getTemplateArgs(),
487                                                   Node->getNumTemplateArgs(),
488                                                   Policy);
489}
490
491void StmtPrinter::VisitUnresolvedLookupExpr(UnresolvedLookupExpr *Node) {
492  if (Node->getQualifier())
493    Node->getQualifier()->print(OS, Policy);
494  OS << Node->getNameInfo();
495  if (Node->hasExplicitTemplateArgs())
496    OS << TemplateSpecializationType::PrintTemplateArgumentList(
497                                                   Node->getTemplateArgs(),
498                                                   Node->getNumTemplateArgs(),
499                                                   Policy);
500}
501
502void StmtPrinter::VisitObjCIvarRefExpr(ObjCIvarRefExpr *Node) {
503  if (Node->getBase()) {
504    PrintExpr(Node->getBase());
505    OS << (Node->isArrow() ? "->" : ".");
506  }
507  OS << Node->getDecl();
508}
509
510void StmtPrinter::VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *Node) {
511  if (Node->getBase()) {
512    PrintExpr(Node->getBase());
513    OS << ".";
514  }
515  OS << Node->getProperty()->getName();
516}
517
518void StmtPrinter::VisitObjCImplicitSetterGetterRefExpr(
519                                        ObjCImplicitSetterGetterRefExpr *Node) {
520  if (Node->getBase()) {
521    PrintExpr(Node->getBase());
522    OS << ".";
523  }
524  if (Node->getGetterMethod())
525    OS << Node->getGetterMethod();
526
527}
528
529void StmtPrinter::VisitPredefinedExpr(PredefinedExpr *Node) {
530  switch (Node->getIdentType()) {
531    default:
532      assert(0 && "unknown case");
533    case PredefinedExpr::Func:
534      OS << "__func__";
535      break;
536    case PredefinedExpr::Function:
537      OS << "__FUNCTION__";
538      break;
539    case PredefinedExpr::PrettyFunction:
540      OS << "__PRETTY_FUNCTION__";
541      break;
542  }
543}
544
545void StmtPrinter::VisitCharacterLiteral(CharacterLiteral *Node) {
546  unsigned value = Node->getValue();
547  if (Node->isWide())
548    OS << "L";
549  switch (value) {
550  case '\\':
551    OS << "'\\\\'";
552    break;
553  case '\'':
554    OS << "'\\''";
555    break;
556  case '\a':
557    // TODO: K&R: the meaning of '\\a' is different in traditional C
558    OS << "'\\a'";
559    break;
560  case '\b':
561    OS << "'\\b'";
562    break;
563  // Nonstandard escape sequence.
564  /*case '\e':
565    OS << "'\\e'";
566    break;*/
567  case '\f':
568    OS << "'\\f'";
569    break;
570  case '\n':
571    OS << "'\\n'";
572    break;
573  case '\r':
574    OS << "'\\r'";
575    break;
576  case '\t':
577    OS << "'\\t'";
578    break;
579  case '\v':
580    OS << "'\\v'";
581    break;
582  default:
583    if (value < 256 && isprint(value)) {
584      OS << "'" << (char)value << "'";
585    } else if (value < 256) {
586      OS << "'\\x" << llvm::format("%x", value) << "'";
587    } else {
588      // FIXME what to really do here?
589      OS << value;
590    }
591  }
592}
593
594void StmtPrinter::VisitIntegerLiteral(IntegerLiteral *Node) {
595  bool isSigned = Node->getType()->isSignedIntegerType();
596  OS << Node->getValue().toString(10, isSigned);
597
598  // Emit suffixes.  Integer literals are always a builtin integer type.
599  switch (Node->getType()->getAs<BuiltinType>()->getKind()) {
600  default: assert(0 && "Unexpected type for integer literal!");
601  case BuiltinType::Int:       break; // no suffix.
602  case BuiltinType::UInt:      OS << 'U'; break;
603  case BuiltinType::Long:      OS << 'L'; break;
604  case BuiltinType::ULong:     OS << "UL"; break;
605  case BuiltinType::LongLong:  OS << "LL"; break;
606  case BuiltinType::ULongLong: OS << "ULL"; break;
607  }
608}
609void StmtPrinter::VisitFloatingLiteral(FloatingLiteral *Node) {
610  // FIXME: print value more precisely.
611  OS << Node->getValueAsApproximateDouble();
612}
613
614void StmtPrinter::VisitImaginaryLiteral(ImaginaryLiteral *Node) {
615  PrintExpr(Node->getSubExpr());
616  OS << "i";
617}
618
619void StmtPrinter::VisitStringLiteral(StringLiteral *Str) {
620  if (Str->isWide()) OS << 'L';
621  OS << '"';
622
623  // FIXME: this doesn't print wstrings right.
624  llvm::StringRef StrData = Str->getString();
625  for (llvm::StringRef::iterator I = StrData.begin(), E = StrData.end();
626                                                             I != E; ++I) {
627    unsigned char Char = *I;
628
629    switch (Char) {
630    default:
631      if (isprint(Char))
632        OS << (char)Char;
633      else  // Output anything hard as an octal escape.
634        OS << '\\'
635        << (char)('0'+ ((Char >> 6) & 7))
636        << (char)('0'+ ((Char >> 3) & 7))
637        << (char)('0'+ ((Char >> 0) & 7));
638      break;
639    // Handle some common non-printable cases to make dumps prettier.
640    case '\\': OS << "\\\\"; break;
641    case '"': OS << "\\\""; break;
642    case '\n': OS << "\\n"; break;
643    case '\t': OS << "\\t"; break;
644    case '\a': OS << "\\a"; break;
645    case '\b': OS << "\\b"; break;
646    }
647  }
648  OS << '"';
649}
650void StmtPrinter::VisitParenExpr(ParenExpr *Node) {
651  OS << "(";
652  PrintExpr(Node->getSubExpr());
653  OS << ")";
654}
655void StmtPrinter::VisitUnaryOperator(UnaryOperator *Node) {
656  if (!Node->isPostfix()) {
657    OS << UnaryOperator::getOpcodeStr(Node->getOpcode());
658
659    // Print a space if this is an "identifier operator" like __real, or if
660    // it might be concatenated incorrectly like '+'.
661    switch (Node->getOpcode()) {
662    default: break;
663    case UO_Real:
664    case UO_Imag:
665    case UO_Extension:
666      OS << ' ';
667      break;
668    case UO_Plus:
669    case UO_Minus:
670      if (isa<UnaryOperator>(Node->getSubExpr()))
671        OS << ' ';
672      break;
673    }
674  }
675  PrintExpr(Node->getSubExpr());
676
677  if (Node->isPostfix())
678    OS << UnaryOperator::getOpcodeStr(Node->getOpcode());
679}
680
681void StmtPrinter::VisitOffsetOfExpr(OffsetOfExpr *Node) {
682  OS << "__builtin_offsetof(";
683  OS << Node->getTypeSourceInfo()->getType().getAsString(Policy) << ", ";
684  bool PrintedSomething = false;
685  for (unsigned i = 0, n = Node->getNumComponents(); i < n; ++i) {
686    OffsetOfExpr::OffsetOfNode ON = Node->getComponent(i);
687    if (ON.getKind() == OffsetOfExpr::OffsetOfNode::Array) {
688      // Array node
689      OS << "[";
690      PrintExpr(Node->getIndexExpr(ON.getArrayExprIndex()));
691      OS << "]";
692      PrintedSomething = true;
693      continue;
694    }
695
696    // Skip implicit base indirections.
697    if (ON.getKind() == OffsetOfExpr::OffsetOfNode::Base)
698      continue;
699
700    // Field or identifier node.
701    IdentifierInfo *Id = ON.getFieldName();
702    if (!Id)
703      continue;
704
705    if (PrintedSomething)
706      OS << ".";
707    else
708      PrintedSomething = true;
709    OS << Id->getName();
710  }
711  OS << ")";
712}
713
714void StmtPrinter::VisitSizeOfAlignOfExpr(SizeOfAlignOfExpr *Node) {
715  OS << (Node->isSizeOf() ? "sizeof" : "__alignof");
716  if (Node->isArgumentType())
717    OS << "(" << Node->getArgumentType().getAsString(Policy) << ")";
718  else {
719    OS << " ";
720    PrintExpr(Node->getArgumentExpr());
721  }
722}
723void StmtPrinter::VisitArraySubscriptExpr(ArraySubscriptExpr *Node) {
724  PrintExpr(Node->getLHS());
725  OS << "[";
726  PrintExpr(Node->getRHS());
727  OS << "]";
728}
729
730void StmtPrinter::VisitCallExpr(CallExpr *Call) {
731  PrintExpr(Call->getCallee());
732  OS << "(";
733  for (unsigned i = 0, e = Call->getNumArgs(); i != e; ++i) {
734    if (isa<CXXDefaultArgExpr>(Call->getArg(i))) {
735      // Don't print any defaulted arguments
736      break;
737    }
738
739    if (i) OS << ", ";
740    PrintExpr(Call->getArg(i));
741  }
742  OS << ")";
743}
744void StmtPrinter::VisitMemberExpr(MemberExpr *Node) {
745  // FIXME: Suppress printing implicit bases (like "this")
746  PrintExpr(Node->getBase());
747  if (FieldDecl *FD = dyn_cast<FieldDecl>(Node->getMemberDecl()))
748    if (FD->isAnonymousStructOrUnion())
749      return;
750  OS << (Node->isArrow() ? "->" : ".");
751  if (NestedNameSpecifier *Qualifier = Node->getQualifier())
752    Qualifier->print(OS, Policy);
753
754  OS << Node->getMemberNameInfo();
755
756  if (Node->hasExplicitTemplateArgs())
757    OS << TemplateSpecializationType::PrintTemplateArgumentList(
758                                                    Node->getTemplateArgs(),
759                                                    Node->getNumTemplateArgs(),
760                                                                Policy);
761}
762void StmtPrinter::VisitObjCIsaExpr(ObjCIsaExpr *Node) {
763  PrintExpr(Node->getBase());
764  OS << (Node->isArrow() ? "->isa" : ".isa");
765}
766
767void StmtPrinter::VisitExtVectorElementExpr(ExtVectorElementExpr *Node) {
768  PrintExpr(Node->getBase());
769  OS << ".";
770  OS << Node->getAccessor().getName();
771}
772void StmtPrinter::VisitCStyleCastExpr(CStyleCastExpr *Node) {
773  OS << "(" << Node->getType().getAsString(Policy) << ")";
774  PrintExpr(Node->getSubExpr());
775}
776void StmtPrinter::VisitCompoundLiteralExpr(CompoundLiteralExpr *Node) {
777  OS << "(" << Node->getType().getAsString(Policy) << ")";
778  PrintExpr(Node->getInitializer());
779}
780void StmtPrinter::VisitImplicitCastExpr(ImplicitCastExpr *Node) {
781  // No need to print anything, simply forward to the sub expression.
782  PrintExpr(Node->getSubExpr());
783}
784void StmtPrinter::VisitBinaryOperator(BinaryOperator *Node) {
785  PrintExpr(Node->getLHS());
786  OS << " " << BinaryOperator::getOpcodeStr(Node->getOpcode()) << " ";
787  PrintExpr(Node->getRHS());
788}
789void StmtPrinter::VisitCompoundAssignOperator(CompoundAssignOperator *Node) {
790  PrintExpr(Node->getLHS());
791  OS << " " << BinaryOperator::getOpcodeStr(Node->getOpcode()) << " ";
792  PrintExpr(Node->getRHS());
793}
794void StmtPrinter::VisitConditionalOperator(ConditionalOperator *Node) {
795  PrintExpr(Node->getCond());
796
797  if (Node->getLHS()) {
798    OS << " ? ";
799    PrintExpr(Node->getLHS());
800    OS << " : ";
801  }
802  else { // Handle GCC extension where LHS can be NULL.
803    OS << " ?: ";
804  }
805
806  PrintExpr(Node->getRHS());
807}
808
809// GNU extensions.
810
811void StmtPrinter::VisitAddrLabelExpr(AddrLabelExpr *Node) {
812  OS << "&&" << Node->getLabel()->getName();
813}
814
815void StmtPrinter::VisitStmtExpr(StmtExpr *E) {
816  OS << "(";
817  PrintRawCompoundStmt(E->getSubStmt());
818  OS << ")";
819}
820
821void StmtPrinter::VisitTypesCompatibleExpr(TypesCompatibleExpr *Node) {
822  OS << "__builtin_types_compatible_p(";
823  OS << Node->getArgType1().getAsString(Policy) << ",";
824  OS << Node->getArgType2().getAsString(Policy) << ")";
825}
826
827void StmtPrinter::VisitChooseExpr(ChooseExpr *Node) {
828  OS << "__builtin_choose_expr(";
829  PrintExpr(Node->getCond());
830  OS << ", ";
831  PrintExpr(Node->getLHS());
832  OS << ", ";
833  PrintExpr(Node->getRHS());
834  OS << ")";
835}
836
837void StmtPrinter::VisitGNUNullExpr(GNUNullExpr *) {
838  OS << "__null";
839}
840
841void StmtPrinter::VisitShuffleVectorExpr(ShuffleVectorExpr *Node) {
842  OS << "__builtin_shufflevector(";
843  for (unsigned i = 0, e = Node->getNumSubExprs(); i != e; ++i) {
844    if (i) OS << ", ";
845    PrintExpr(Node->getExpr(i));
846  }
847  OS << ")";
848}
849
850void StmtPrinter::VisitInitListExpr(InitListExpr* Node) {
851  if (Node->getSyntacticForm()) {
852    Visit(Node->getSyntacticForm());
853    return;
854  }
855
856  OS << "{ ";
857  for (unsigned i = 0, e = Node->getNumInits(); i != e; ++i) {
858    if (i) OS << ", ";
859    if (Node->getInit(i))
860      PrintExpr(Node->getInit(i));
861    else
862      OS << "0";
863  }
864  OS << " }";
865}
866
867void StmtPrinter::VisitParenListExpr(ParenListExpr* Node) {
868  OS << "( ";
869  for (unsigned i = 0, e = Node->getNumExprs(); i != e; ++i) {
870    if (i) OS << ", ";
871    PrintExpr(Node->getExpr(i));
872  }
873  OS << " )";
874}
875
876void StmtPrinter::VisitDesignatedInitExpr(DesignatedInitExpr *Node) {
877  for (DesignatedInitExpr::designators_iterator D = Node->designators_begin(),
878                      DEnd = Node->designators_end();
879       D != DEnd; ++D) {
880    if (D->isFieldDesignator()) {
881      if (D->getDotLoc().isInvalid())
882        OS << D->getFieldName()->getName() << ":";
883      else
884        OS << "." << D->getFieldName()->getName();
885    } else {
886      OS << "[";
887      if (D->isArrayDesignator()) {
888        PrintExpr(Node->getArrayIndex(*D));
889      } else {
890        PrintExpr(Node->getArrayRangeStart(*D));
891        OS << " ... ";
892        PrintExpr(Node->getArrayRangeEnd(*D));
893      }
894      OS << "]";
895    }
896  }
897
898  OS << " = ";
899  PrintExpr(Node->getInit());
900}
901
902void StmtPrinter::VisitImplicitValueInitExpr(ImplicitValueInitExpr *Node) {
903  if (Policy.LangOpts.CPlusPlus)
904    OS << "/*implicit*/" << Node->getType().getAsString(Policy) << "()";
905  else {
906    OS << "/*implicit*/(" << Node->getType().getAsString(Policy) << ")";
907    if (Node->getType()->isRecordType())
908      OS << "{}";
909    else
910      OS << 0;
911  }
912}
913
914void StmtPrinter::VisitVAArgExpr(VAArgExpr *Node) {
915  OS << "__builtin_va_arg(";
916  PrintExpr(Node->getSubExpr());
917  OS << ", ";
918  OS << Node->getType().getAsString(Policy);
919  OS << ")";
920}
921
922// C++
923void StmtPrinter::VisitCXXOperatorCallExpr(CXXOperatorCallExpr *Node) {
924  const char *OpStrings[NUM_OVERLOADED_OPERATORS] = {
925    "",
926#define OVERLOADED_OPERATOR(Name,Spelling,Token,Unary,Binary,MemberOnly) \
927    Spelling,
928#include "clang/Basic/OperatorKinds.def"
929  };
930
931  OverloadedOperatorKind Kind = Node->getOperator();
932  if (Kind == OO_PlusPlus || Kind == OO_MinusMinus) {
933    if (Node->getNumArgs() == 1) {
934      OS << OpStrings[Kind] << ' ';
935      PrintExpr(Node->getArg(0));
936    } else {
937      PrintExpr(Node->getArg(0));
938      OS << ' ' << OpStrings[Kind];
939    }
940  } else if (Kind == OO_Call) {
941    PrintExpr(Node->getArg(0));
942    OS << '(';
943    for (unsigned ArgIdx = 1; ArgIdx < Node->getNumArgs(); ++ArgIdx) {
944      if (ArgIdx > 1)
945        OS << ", ";
946      if (!isa<CXXDefaultArgExpr>(Node->getArg(ArgIdx)))
947        PrintExpr(Node->getArg(ArgIdx));
948    }
949    OS << ')';
950  } else if (Kind == OO_Subscript) {
951    PrintExpr(Node->getArg(0));
952    OS << '[';
953    PrintExpr(Node->getArg(1));
954    OS << ']';
955  } else if (Node->getNumArgs() == 1) {
956    OS << OpStrings[Kind] << ' ';
957    PrintExpr(Node->getArg(0));
958  } else if (Node->getNumArgs() == 2) {
959    PrintExpr(Node->getArg(0));
960    OS << ' ' << OpStrings[Kind] << ' ';
961    PrintExpr(Node->getArg(1));
962  } else {
963    assert(false && "unknown overloaded operator");
964  }
965}
966
967void StmtPrinter::VisitCXXMemberCallExpr(CXXMemberCallExpr *Node) {
968  VisitCallExpr(cast<CallExpr>(Node));
969}
970
971void StmtPrinter::VisitCXXNamedCastExpr(CXXNamedCastExpr *Node) {
972  OS << Node->getCastName() << '<';
973  OS << Node->getTypeAsWritten().getAsString(Policy) << ">(";
974  PrintExpr(Node->getSubExpr());
975  OS << ")";
976}
977
978void StmtPrinter::VisitCXXStaticCastExpr(CXXStaticCastExpr *Node) {
979  VisitCXXNamedCastExpr(Node);
980}
981
982void StmtPrinter::VisitCXXDynamicCastExpr(CXXDynamicCastExpr *Node) {
983  VisitCXXNamedCastExpr(Node);
984}
985
986void StmtPrinter::VisitCXXReinterpretCastExpr(CXXReinterpretCastExpr *Node) {
987  VisitCXXNamedCastExpr(Node);
988}
989
990void StmtPrinter::VisitCXXConstCastExpr(CXXConstCastExpr *Node) {
991  VisitCXXNamedCastExpr(Node);
992}
993
994void StmtPrinter::VisitCXXTypeidExpr(CXXTypeidExpr *Node) {
995  OS << "typeid(";
996  if (Node->isTypeOperand()) {
997    OS << Node->getTypeOperand().getAsString(Policy);
998  } else {
999    PrintExpr(Node->getExprOperand());
1000  }
1001  OS << ")";
1002}
1003
1004void StmtPrinter::VisitCXXBoolLiteralExpr(CXXBoolLiteralExpr *Node) {
1005  OS << (Node->getValue() ? "true" : "false");
1006}
1007
1008void StmtPrinter::VisitCXXNullPtrLiteralExpr(CXXNullPtrLiteralExpr *Node) {
1009  OS << "nullptr";
1010}
1011
1012void StmtPrinter::VisitCXXThisExpr(CXXThisExpr *Node) {
1013  OS << "this";
1014}
1015
1016void StmtPrinter::VisitCXXThrowExpr(CXXThrowExpr *Node) {
1017  if (Node->getSubExpr() == 0)
1018    OS << "throw";
1019  else {
1020    OS << "throw ";
1021    PrintExpr(Node->getSubExpr());
1022  }
1023}
1024
1025void StmtPrinter::VisitCXXDefaultArgExpr(CXXDefaultArgExpr *Node) {
1026  // Nothing to print: we picked up the default argument
1027}
1028
1029void StmtPrinter::VisitCXXFunctionalCastExpr(CXXFunctionalCastExpr *Node) {
1030  OS << Node->getType().getAsString(Policy);
1031  OS << "(";
1032  PrintExpr(Node->getSubExpr());
1033  OS << ")";
1034}
1035
1036void StmtPrinter::VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *Node) {
1037  PrintExpr(Node->getSubExpr());
1038}
1039
1040void StmtPrinter::VisitCXXBindReferenceExpr(CXXBindReferenceExpr *Node) {
1041  PrintExpr(Node->getSubExpr());
1042}
1043
1044void StmtPrinter::VisitCXXTemporaryObjectExpr(CXXTemporaryObjectExpr *Node) {
1045  OS << Node->getType().getAsString(Policy);
1046  OS << "(";
1047  for (CXXTemporaryObjectExpr::arg_iterator Arg = Node->arg_begin(),
1048                                         ArgEnd = Node->arg_end();
1049       Arg != ArgEnd; ++Arg) {
1050    if (Arg != Node->arg_begin())
1051      OS << ", ";
1052    PrintExpr(*Arg);
1053  }
1054  OS << ")";
1055}
1056
1057void StmtPrinter::VisitCXXScalarValueInitExpr(CXXScalarValueInitExpr *Node) {
1058  OS << Node->getType().getAsString(Policy) << "()";
1059}
1060
1061void StmtPrinter::VisitCXXNewExpr(CXXNewExpr *E) {
1062  if (E->isGlobalNew())
1063    OS << "::";
1064  OS << "new ";
1065  unsigned NumPlace = E->getNumPlacementArgs();
1066  if (NumPlace > 0) {
1067    OS << "(";
1068    PrintExpr(E->getPlacementArg(0));
1069    for (unsigned i = 1; i < NumPlace; ++i) {
1070      OS << ", ";
1071      PrintExpr(E->getPlacementArg(i));
1072    }
1073    OS << ") ";
1074  }
1075  if (E->isParenTypeId())
1076    OS << "(";
1077  std::string TypeS;
1078  if (Expr *Size = E->getArraySize()) {
1079    llvm::raw_string_ostream s(TypeS);
1080    Size->printPretty(s, Context, Helper, Policy);
1081    s.flush();
1082    TypeS = "[" + TypeS + "]";
1083  }
1084  E->getAllocatedType().getAsStringInternal(TypeS, Policy);
1085  OS << TypeS;
1086  if (E->isParenTypeId())
1087    OS << ")";
1088
1089  if (E->hasInitializer()) {
1090    OS << "(";
1091    unsigned NumCons = E->getNumConstructorArgs();
1092    if (NumCons > 0) {
1093      PrintExpr(E->getConstructorArg(0));
1094      for (unsigned i = 1; i < NumCons; ++i) {
1095        OS << ", ";
1096        PrintExpr(E->getConstructorArg(i));
1097      }
1098    }
1099    OS << ")";
1100  }
1101}
1102
1103void StmtPrinter::VisitCXXDeleteExpr(CXXDeleteExpr *E) {
1104  if (E->isGlobalDelete())
1105    OS << "::";
1106  OS << "delete ";
1107  if (E->isArrayForm())
1108    OS << "[] ";
1109  PrintExpr(E->getArgument());
1110}
1111
1112void StmtPrinter::VisitCXXPseudoDestructorExpr(CXXPseudoDestructorExpr *E) {
1113  PrintExpr(E->getBase());
1114  if (E->isArrow())
1115    OS << "->";
1116  else
1117    OS << '.';
1118  if (E->getQualifier())
1119    E->getQualifier()->print(OS, Policy);
1120
1121  std::string TypeS;
1122  if (IdentifierInfo *II = E->getDestroyedTypeIdentifier())
1123    OS << II->getName();
1124  else
1125    E->getDestroyedType().getAsStringInternal(TypeS, Policy);
1126  OS << TypeS;
1127}
1128
1129void StmtPrinter::VisitCXXConstructExpr(CXXConstructExpr *E) {
1130  // FIXME. For now we just print a trivial constructor call expression,
1131  // constructing its first argument object.
1132  if (E->getNumArgs() == 1) {
1133    CXXConstructorDecl *CD = E->getConstructor();
1134    if (CD->isTrivial())
1135      PrintExpr(E->getArg(0));
1136  }
1137  // Nothing to print.
1138}
1139
1140void StmtPrinter::VisitCXXExprWithTemporaries(CXXExprWithTemporaries *E) {
1141  // Just forward to the sub expression.
1142  PrintExpr(E->getSubExpr());
1143}
1144
1145void
1146StmtPrinter::VisitCXXUnresolvedConstructExpr(
1147                                           CXXUnresolvedConstructExpr *Node) {
1148  OS << Node->getTypeAsWritten().getAsString(Policy);
1149  OS << "(";
1150  for (CXXUnresolvedConstructExpr::arg_iterator Arg = Node->arg_begin(),
1151                                             ArgEnd = Node->arg_end();
1152       Arg != ArgEnd; ++Arg) {
1153    if (Arg != Node->arg_begin())
1154      OS << ", ";
1155    PrintExpr(*Arg);
1156  }
1157  OS << ")";
1158}
1159
1160void StmtPrinter::VisitCXXDependentScopeMemberExpr(
1161                                         CXXDependentScopeMemberExpr *Node) {
1162  if (!Node->isImplicitAccess()) {
1163    PrintExpr(Node->getBase());
1164    OS << (Node->isArrow() ? "->" : ".");
1165  }
1166  if (NestedNameSpecifier *Qualifier = Node->getQualifier())
1167    Qualifier->print(OS, Policy);
1168  else if (Node->hasExplicitTemplateArgs())
1169    // FIXME: Track use of "template" keyword explicitly?
1170    OS << "template ";
1171
1172  OS << Node->getMemberNameInfo();
1173
1174  if (Node->hasExplicitTemplateArgs()) {
1175    OS << TemplateSpecializationType::PrintTemplateArgumentList(
1176                                                    Node->getTemplateArgs(),
1177                                                    Node->getNumTemplateArgs(),
1178                                                    Policy);
1179  }
1180}
1181
1182void StmtPrinter::VisitUnresolvedMemberExpr(UnresolvedMemberExpr *Node) {
1183  if (!Node->isImplicitAccess()) {
1184    PrintExpr(Node->getBase());
1185    OS << (Node->isArrow() ? "->" : ".");
1186  }
1187  if (NestedNameSpecifier *Qualifier = Node->getQualifier())
1188    Qualifier->print(OS, Policy);
1189
1190  // FIXME: this might originally have been written with 'template'
1191
1192  OS << Node->getMemberNameInfo();
1193
1194  if (Node->hasExplicitTemplateArgs()) {
1195    OS << TemplateSpecializationType::PrintTemplateArgumentList(
1196                                                    Node->getTemplateArgs(),
1197                                                    Node->getNumTemplateArgs(),
1198                                                    Policy);
1199  }
1200}
1201
1202void StmtPrinter::VisitUDLiteralExpr(UDLiteralExpr *Node) {
1203  VisitStmt(Node->getBaseLiteral());
1204  OS << Node->getUDSuffix()->getName();
1205}
1206
1207static const char *getTypeTraitName(UnaryTypeTrait UTT) {
1208  switch (UTT) {
1209  default: assert(false && "Unknown type trait");
1210  case UTT_HasNothrowAssign:      return "__has_nothrow_assign";
1211  case UTT_HasNothrowCopy:        return "__has_nothrow_copy";
1212  case UTT_HasNothrowConstructor: return "__has_nothrow_constructor";
1213  case UTT_HasTrivialAssign:      return "__has_trivial_assign";
1214  case UTT_HasTrivialCopy:        return "__has_trivial_copy";
1215  case UTT_HasTrivialConstructor: return "__has_trivial_constructor";
1216  case UTT_HasTrivialDestructor:  return "__has_trivial_destructor";
1217  case UTT_HasVirtualDestructor:  return "__has_virtual_destructor";
1218  case UTT_IsAbstract:            return "__is_abstract";
1219  case UTT_IsClass:               return "__is_class";
1220  case UTT_IsEmpty:               return "__is_empty";
1221  case UTT_IsEnum:                return "__is_enum";
1222  case UTT_IsPOD:                 return "__is_pod";
1223  case UTT_IsPolymorphic:         return "__is_polymorphic";
1224  case UTT_IsUnion:               return "__is_union";
1225  }
1226}
1227
1228void StmtPrinter::VisitUnaryTypeTraitExpr(UnaryTypeTraitExpr *E) {
1229  OS << getTypeTraitName(E->getTrait()) << "("
1230     << E->getQueriedType().getAsString(Policy) << ")";
1231}
1232
1233// Obj-C
1234
1235void StmtPrinter::VisitObjCStringLiteral(ObjCStringLiteral *Node) {
1236  OS << "@";
1237  VisitStringLiteral(Node->getString());
1238}
1239
1240void StmtPrinter::VisitObjCEncodeExpr(ObjCEncodeExpr *Node) {
1241  OS << "@encode(" << Node->getEncodedType().getAsString(Policy) << ')';
1242}
1243
1244void StmtPrinter::VisitObjCSelectorExpr(ObjCSelectorExpr *Node) {
1245  OS << "@selector(" << Node->getSelector().getAsString() << ')';
1246}
1247
1248void StmtPrinter::VisitObjCProtocolExpr(ObjCProtocolExpr *Node) {
1249  OS << "@protocol(" << Node->getProtocol() << ')';
1250}
1251
1252void StmtPrinter::VisitObjCMessageExpr(ObjCMessageExpr *Mess) {
1253  OS << "[";
1254  switch (Mess->getReceiverKind()) {
1255  case ObjCMessageExpr::Instance:
1256    PrintExpr(Mess->getInstanceReceiver());
1257    break;
1258
1259  case ObjCMessageExpr::Class:
1260    OS << Mess->getClassReceiver().getAsString(Policy);
1261    break;
1262
1263  case ObjCMessageExpr::SuperInstance:
1264  case ObjCMessageExpr::SuperClass:
1265    OS << "Super";
1266    break;
1267  }
1268
1269  OS << ' ';
1270  Selector selector = Mess->getSelector();
1271  if (selector.isUnarySelector()) {
1272    OS << selector.getIdentifierInfoForSlot(0)->getName();
1273  } else {
1274    for (unsigned i = 0, e = Mess->getNumArgs(); i != e; ++i) {
1275      if (i < selector.getNumArgs()) {
1276        if (i > 0) OS << ' ';
1277        if (selector.getIdentifierInfoForSlot(i))
1278          OS << selector.getIdentifierInfoForSlot(i)->getName() << ':';
1279        else
1280           OS << ":";
1281      }
1282      else OS << ", "; // Handle variadic methods.
1283
1284      PrintExpr(Mess->getArg(i));
1285    }
1286  }
1287  OS << "]";
1288}
1289
1290void StmtPrinter::VisitObjCSuperExpr(ObjCSuperExpr *) {
1291  OS << "super";
1292}
1293
1294void StmtPrinter::VisitBlockExpr(BlockExpr *Node) {
1295  BlockDecl *BD = Node->getBlockDecl();
1296  OS << "^";
1297
1298  const FunctionType *AFT = Node->getFunctionType();
1299
1300  if (isa<FunctionNoProtoType>(AFT)) {
1301    OS << "()";
1302  } else if (!BD->param_empty() || cast<FunctionProtoType>(AFT)->isVariadic()) {
1303    OS << '(';
1304    std::string ParamStr;
1305    for (BlockDecl::param_iterator AI = BD->param_begin(),
1306         E = BD->param_end(); AI != E; ++AI) {
1307      if (AI != BD->param_begin()) OS << ", ";
1308      ParamStr = (*AI)->getNameAsString();
1309      (*AI)->getType().getAsStringInternal(ParamStr, Policy);
1310      OS << ParamStr;
1311    }
1312
1313    const FunctionProtoType *FT = cast<FunctionProtoType>(AFT);
1314    if (FT->isVariadic()) {
1315      if (!BD->param_empty()) OS << ", ";
1316      OS << "...";
1317    }
1318    OS << ')';
1319  }
1320}
1321
1322void StmtPrinter::VisitBlockDeclRefExpr(BlockDeclRefExpr *Node) {
1323  OS << Node->getDecl();
1324}
1325//===----------------------------------------------------------------------===//
1326// Stmt method implementations
1327//===----------------------------------------------------------------------===//
1328
1329void Stmt::dumpPretty(ASTContext& Context) const {
1330  printPretty(llvm::errs(), Context, 0,
1331              PrintingPolicy(Context.getLangOptions()));
1332}
1333
1334void Stmt::printPretty(llvm::raw_ostream &OS, ASTContext& Context,
1335                       PrinterHelper* Helper,
1336                       const PrintingPolicy &Policy,
1337                       unsigned Indentation) const {
1338  if (this == 0) {
1339    OS << "<NULL>";
1340    return;
1341  }
1342
1343  if (Policy.Dump && &Context) {
1344    dump(OS, Context.getSourceManager());
1345    return;
1346  }
1347
1348  StmtPrinter P(OS, Context, Helper, Policy, Indentation);
1349  P.Visit(const_cast<Stmt*>(this));
1350}
1351
1352//===----------------------------------------------------------------------===//
1353// PrinterHelper
1354//===----------------------------------------------------------------------===//
1355
1356// Implement virtual destructor.
1357PrinterHelper::~PrinterHelper() {}
1358