StmtPrinter.cpp revision 03e80030515c800d1ab44125b9052dfffd1bd04c 
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/DeclTemplate.h"
19#include "clang/AST/PrettyPrinter.h"
20#include "llvm/Support/Format.h"
21#include "clang/AST/Expr.h"
22#include "clang/AST/ExprCXX.h"
23using namespace clang;
24
25//===----------------------------------------------------------------------===//
26// StmtPrinter Visitor
27//===----------------------------------------------------------------------===//
28
29namespace  {
30  class StmtPrinter : public StmtVisitor<StmtPrinter> {
31    llvm::raw_ostream &OS;
32    ASTContext &Context;
33    unsigned IndentLevel;
34    clang::PrinterHelper* Helper;
35    PrintingPolicy Policy;
36
37  public:
38    StmtPrinter(llvm::raw_ostream &os, ASTContext &C, PrinterHelper* helper,
39                const PrintingPolicy &Policy,
40                unsigned Indentation = 0)
41      : OS(os), Context(C), IndentLevel(Indentation), Helper(helper),
42        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(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    llvm::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(DeclStmt *S) {
126  DeclStmt::decl_iterator Begin = S->decl_begin(), End = S->decl_end();
127  llvm::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::PrintRawIfStmt(IfStmt *If) {
173  OS << "if (";
174  PrintExpr(If->getCond());
175  OS << ')';
176
177  if (CompoundStmt *CS = dyn_cast<CompoundStmt>(If->getThen())) {
178    OS << ' ';
179    PrintRawCompoundStmt(CS);
180    OS << (If->getElse() ? ' ' : '\n');
181  } else {
182    OS << '\n';
183    PrintStmt(If->getThen());
184    if (If->getElse()) Indent();
185  }
186
187  if (Stmt *Else = If->getElse()) {
188    OS << "else";
189
190    if (CompoundStmt *CS = dyn_cast<CompoundStmt>(Else)) {
191      OS << ' ';
192      PrintRawCompoundStmt(CS);
193      OS << '\n';
194    } else if (IfStmt *ElseIf = dyn_cast<IfStmt>(Else)) {
195      OS << ' ';
196      PrintRawIfStmt(ElseIf);
197    } else {
198      OS << '\n';
199      PrintStmt(If->getElse());
200    }
201  }
202}
203
204void StmtPrinter::VisitIfStmt(IfStmt *If) {
205  Indent();
206  PrintRawIfStmt(If);
207}
208
209void StmtPrinter::VisitSwitchStmt(SwitchStmt *Node) {
210  Indent() << "switch (";
211  PrintExpr(Node->getCond());
212  OS << ")";
213
214  // Pretty print compoundstmt bodies (very common).
215  if (CompoundStmt *CS = dyn_cast<CompoundStmt>(Node->getBody())) {
216    OS << " ";
217    PrintRawCompoundStmt(CS);
218    OS << "\n";
219  } else {
220    OS << "\n";
221    PrintStmt(Node->getBody());
222  }
223}
224
225void StmtPrinter::VisitWhileStmt(WhileStmt *Node) {
226  Indent() << "while (";
227  PrintExpr(Node->getCond());
228  OS << ")\n";
229  PrintStmt(Node->getBody());
230}
231
232void StmtPrinter::VisitDoStmt(DoStmt *Node) {
233  Indent() << "do ";
234  if (CompoundStmt *CS = dyn_cast<CompoundStmt>(Node->getBody())) {
235    PrintRawCompoundStmt(CS);
236    OS << " ";
237  } else {
238    OS << "\n";
239    PrintStmt(Node->getBody());
240    Indent();
241  }
242
243  OS << "while (";
244  PrintExpr(Node->getCond());
245  OS << ");\n";
246}
247
248void StmtPrinter::VisitForStmt(ForStmt *Node) {
249  Indent() << "for (";
250  if (Node->getInit()) {
251    if (DeclStmt *DS = dyn_cast<DeclStmt>(Node->getInit()))
252      PrintRawDeclStmt(DS);
253    else
254      PrintExpr(cast<Expr>(Node->getInit()));
255  }
256  OS << ";";
257  if (Node->getCond()) {
258    OS << " ";
259    PrintExpr(Node->getCond());
260  }
261  OS << ";";
262  if (Node->getInc()) {
263    OS << " ";
264    PrintExpr(Node->getInc());
265  }
266  OS << ") ";
267
268  if (CompoundStmt *CS = dyn_cast<CompoundStmt>(Node->getBody())) {
269    PrintRawCompoundStmt(CS);
270    OS << "\n";
271  } else {
272    OS << "\n";
273    PrintStmt(Node->getBody());
274  }
275}
276
277void StmtPrinter::VisitObjCForCollectionStmt(ObjCForCollectionStmt *Node) {
278  Indent() << "for (";
279  if (DeclStmt *DS = dyn_cast<DeclStmt>(Node->getElement()))
280    PrintRawDeclStmt(DS);
281  else
282    PrintExpr(cast<Expr>(Node->getElement()));
283  OS << " in ";
284  PrintExpr(Node->getCollection());
285  OS << ") ";
286
287  if (CompoundStmt *CS = dyn_cast<CompoundStmt>(Node->getBody())) {
288    PrintRawCompoundStmt(CS);
289    OS << "\n";
290  } else {
291    OS << "\n";
292    PrintStmt(Node->getBody());
293  }
294}
295
296void StmtPrinter::VisitCXXForRangeStmt(CXXForRangeStmt *Node) {
297  Indent() << "for (";
298  PrintingPolicy SubPolicy(Policy);
299  SubPolicy.SuppressInitializers = true;
300  Node->getLoopVariable()->print(OS, SubPolicy, IndentLevel);
301  OS << " : ";
302  PrintExpr(Node->getRangeInit());
303  OS << ") {\n";
304  PrintStmt(Node->getBody());
305  Indent() << "}\n";
306}
307
308void StmtPrinter::VisitGotoStmt(GotoStmt *Node) {
309  Indent() << "goto " << Node->getLabel()->getName() << ";\n";
310}
311
312void StmtPrinter::VisitIndirectGotoStmt(IndirectGotoStmt *Node) {
313  Indent() << "goto *";
314  PrintExpr(Node->getTarget());
315  OS << ";\n";
316}
317
318void StmtPrinter::VisitContinueStmt(ContinueStmt *Node) {
319  Indent() << "continue;\n";
320}
321
322void StmtPrinter::VisitBreakStmt(BreakStmt *Node) {
323  Indent() << "break;\n";
324}
325
326
327void StmtPrinter::VisitReturnStmt(ReturnStmt *Node) {
328  Indent() << "return";
329  if (Node->getRetValue()) {
330    OS << " ";
331    PrintExpr(Node->getRetValue());
332  }
333  OS << ";\n";
334}
335
336
337void StmtPrinter::VisitAsmStmt(AsmStmt *Node) {
338  Indent() << "asm ";
339
340  if (Node->isVolatile())
341    OS << "volatile ";
342
343  OS << "(";
344  VisitStringLiteral(Node->getAsmString());
345
346  // Outputs
347  if (Node->getNumOutputs() != 0 || Node->getNumInputs() != 0 ||
348      Node->getNumClobbers() != 0)
349    OS << " : ";
350
351  for (unsigned i = 0, e = Node->getNumOutputs(); i != e; ++i) {
352    if (i != 0)
353      OS << ", ";
354
355    if (!Node->getOutputName(i).empty()) {
356      OS << '[';
357      OS << Node->getOutputName(i);
358      OS << "] ";
359    }
360
361    VisitStringLiteral(Node->getOutputConstraintLiteral(i));
362    OS << " ";
363    Visit(Node->getOutputExpr(i));
364  }
365
366  // Inputs
367  if (Node->getNumInputs() != 0 || Node->getNumClobbers() != 0)
368    OS << " : ";
369
370  for (unsigned i = 0, e = Node->getNumInputs(); i != e; ++i) {
371    if (i != 0)
372      OS << ", ";
373
374    if (!Node->getInputName(i).empty()) {
375      OS << '[';
376      OS << Node->getInputName(i);
377      OS << "] ";
378    }
379
380    VisitStringLiteral(Node->getInputConstraintLiteral(i));
381    OS << " ";
382    Visit(Node->getInputExpr(i));
383  }
384
385  // Clobbers
386  if (Node->getNumClobbers() != 0)
387    OS << " : ";
388
389  for (unsigned i = 0, e = Node->getNumClobbers(); i != e; ++i) {
390    if (i != 0)
391      OS << ", ";
392
393    VisitStringLiteral(Node->getClobber(i));
394  }
395
396  OS << ");\n";
397}
398
399void StmtPrinter::VisitObjCAtTryStmt(ObjCAtTryStmt *Node) {
400  Indent() << "@try";
401  if (CompoundStmt *TS = dyn_cast<CompoundStmt>(Node->getTryBody())) {
402    PrintRawCompoundStmt(TS);
403    OS << "\n";
404  }
405
406  for (unsigned I = 0, N = Node->getNumCatchStmts(); I != N; ++I) {
407    ObjCAtCatchStmt *catchStmt = Node->getCatchStmt(I);
408    Indent() << "@catch(";
409    if (catchStmt->getCatchParamDecl()) {
410      if (Decl *DS = catchStmt->getCatchParamDecl())
411        PrintRawDecl(DS);
412    }
413    OS << ")";
414    if (CompoundStmt *CS = dyn_cast<CompoundStmt>(catchStmt->getCatchBody())) {
415      PrintRawCompoundStmt(CS);
416      OS << "\n";
417    }
418  }
419
420  if (ObjCAtFinallyStmt *FS = static_cast<ObjCAtFinallyStmt *>(
421        Node->getFinallyStmt())) {
422    Indent() << "@finally";
423    PrintRawCompoundStmt(dyn_cast<CompoundStmt>(FS->getFinallyBody()));
424    OS << "\n";
425  }
426}
427
428void StmtPrinter::VisitObjCAtFinallyStmt(ObjCAtFinallyStmt *Node) {
429}
430
431void StmtPrinter::VisitObjCAtCatchStmt (ObjCAtCatchStmt *Node) {
432  Indent() << "@catch (...) { /* todo */ } \n";
433}
434
435void StmtPrinter::VisitObjCAtThrowStmt(ObjCAtThrowStmt *Node) {
436  Indent() << "@throw";
437  if (Node->getThrowExpr()) {
438    OS << " ";
439    PrintExpr(Node->getThrowExpr());
440  }
441  OS << ";\n";
442}
443
444void StmtPrinter::VisitObjCAtSynchronizedStmt(ObjCAtSynchronizedStmt *Node) {
445  Indent() << "@synchronized (";
446  PrintExpr(Node->getSynchExpr());
447  OS << ")";
448  PrintRawCompoundStmt(Node->getSynchBody());
449  OS << "\n";
450}
451
452void StmtPrinter::VisitObjCAutoreleasePoolStmt(ObjCAutoreleasePoolStmt *Node) {
453  Indent() << "@autoreleasepool";
454  PrintRawCompoundStmt(dyn_cast<CompoundStmt>(Node->getSubStmt()));
455  OS << "\n";
456}
457
458void StmtPrinter::PrintRawCXXCatchStmt(CXXCatchStmt *Node) {
459  OS << "catch (";
460  if (Decl *ExDecl = Node->getExceptionDecl())
461    PrintRawDecl(ExDecl);
462  else
463    OS << "...";
464  OS << ") ";
465  PrintRawCompoundStmt(cast<CompoundStmt>(Node->getHandlerBlock()));
466}
467
468void StmtPrinter::VisitCXXCatchStmt(CXXCatchStmt *Node) {
469  Indent();
470  PrintRawCXXCatchStmt(Node);
471  OS << "\n";
472}
473
474void StmtPrinter::VisitCXXTryStmt(CXXTryStmt *Node) {
475  Indent() << "try ";
476  PrintRawCompoundStmt(Node->getTryBlock());
477  for (unsigned i = 0, e = Node->getNumHandlers(); i < e; ++i) {
478    OS << " ";
479    PrintRawCXXCatchStmt(Node->getHandler(i));
480  }
481  OS << "\n";
482}
483
484void StmtPrinter::VisitSEHTryStmt(SEHTryStmt *Node) {
485  Indent() << (Node->getIsCXXTry() ? "try " : "__try ");
486  PrintRawCompoundStmt(Node->getTryBlock());
487  SEHExceptStmt *E = Node->getExceptHandler();
488  SEHFinallyStmt *F = Node->getFinallyHandler();
489  if(E)
490    PrintRawSEHExceptHandler(E);
491  else {
492    assert(F && "Must have a finally block...");
493    PrintRawSEHFinallyStmt(F);
494  }
495  OS << "\n";
496}
497
498void StmtPrinter::PrintRawSEHFinallyStmt(SEHFinallyStmt *Node) {
499  OS << "__finally ";
500  PrintRawCompoundStmt(Node->getBlock());
501  OS << "\n";
502}
503
504void StmtPrinter::PrintRawSEHExceptHandler(SEHExceptStmt *Node) {
505  OS << "__except (";
506  VisitExpr(Node->getFilterExpr());
507  OS << ")\n";
508  PrintRawCompoundStmt(Node->getBlock());
509  OS << "\n";
510}
511
512void StmtPrinter::VisitSEHExceptStmt(SEHExceptStmt *Node) {
513  Indent();
514  PrintRawSEHExceptHandler(Node);
515  OS << "\n";
516}
517
518void StmtPrinter::VisitSEHFinallyStmt(SEHFinallyStmt *Node) {
519  Indent();
520  PrintRawSEHFinallyStmt(Node);
521  OS << "\n";
522}
523
524//===----------------------------------------------------------------------===//
525//  Expr printing methods.
526//===----------------------------------------------------------------------===//
527
528void StmtPrinter::VisitDeclRefExpr(DeclRefExpr *Node) {
529  if (NestedNameSpecifier *Qualifier = Node->getQualifier())
530    Qualifier->print(OS, Policy);
531  OS << Node->getNameInfo();
532  if (Node->hasExplicitTemplateArgs())
533    OS << TemplateSpecializationType::PrintTemplateArgumentList(
534                                                    Node->getTemplateArgs(),
535                                                    Node->getNumTemplateArgs(),
536                                                    Policy);
537}
538
539void StmtPrinter::VisitDependentScopeDeclRefExpr(
540                                           DependentScopeDeclRefExpr *Node) {
541  if (NestedNameSpecifier *Qualifier = Node->getQualifier())
542    Qualifier->print(OS, Policy);
543  OS << Node->getNameInfo();
544  if (Node->hasExplicitTemplateArgs())
545    OS << TemplateSpecializationType::PrintTemplateArgumentList(
546                                                   Node->getTemplateArgs(),
547                                                   Node->getNumTemplateArgs(),
548                                                   Policy);
549}
550
551void StmtPrinter::VisitUnresolvedLookupExpr(UnresolvedLookupExpr *Node) {
552  if (Node->getQualifier())
553    Node->getQualifier()->print(OS, Policy);
554  OS << Node->getNameInfo();
555  if (Node->hasExplicitTemplateArgs())
556    OS << TemplateSpecializationType::PrintTemplateArgumentList(
557                                                   Node->getTemplateArgs(),
558                                                   Node->getNumTemplateArgs(),
559                                                   Policy);
560}
561
562void StmtPrinter::VisitObjCIvarRefExpr(ObjCIvarRefExpr *Node) {
563  if (Node->getBase()) {
564    PrintExpr(Node->getBase());
565    OS << (Node->isArrow() ? "->" : ".");
566  }
567  OS << Node->getDecl();
568}
569
570void StmtPrinter::VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *Node) {
571  if (Node->isSuperReceiver())
572    OS << "super.";
573  else if (Node->getBase()) {
574    PrintExpr(Node->getBase());
575    OS << ".";
576  }
577
578  if (Node->isImplicitProperty())
579    OS << Node->getImplicitPropertyGetter()->getSelector().getAsString();
580  else
581    OS << Node->getExplicitProperty()->getName();
582}
583
584void StmtPrinter::VisitPredefinedExpr(PredefinedExpr *Node) {
585  switch (Node->getIdentType()) {
586    default:
587      assert(0 && "unknown case");
588    case PredefinedExpr::Func:
589      OS << "__func__";
590      break;
591    case PredefinedExpr::Function:
592      OS << "__FUNCTION__";
593      break;
594    case PredefinedExpr::PrettyFunction:
595      OS << "__PRETTY_FUNCTION__";
596      break;
597  }
598}
599
600void StmtPrinter::VisitCharacterLiteral(CharacterLiteral *Node) {
601  unsigned value = Node->getValue();
602  if (Node->isWide())
603    OS << "L";
604  switch (value) {
605  case '\\':
606    OS << "'\\\\'";
607    break;
608  case '\'':
609    OS << "'\\''";
610    break;
611  case '\a':
612    // TODO: K&R: the meaning of '\\a' is different in traditional C
613    OS << "'\\a'";
614    break;
615  case '\b':
616    OS << "'\\b'";
617    break;
618  // Nonstandard escape sequence.
619  /*case '\e':
620    OS << "'\\e'";
621    break;*/
622  case '\f':
623    OS << "'\\f'";
624    break;
625  case '\n':
626    OS << "'\\n'";
627    break;
628  case '\r':
629    OS << "'\\r'";
630    break;
631  case '\t':
632    OS << "'\\t'";
633    break;
634  case '\v':
635    OS << "'\\v'";
636    break;
637  default:
638    if (value < 256 && isprint(value)) {
639      OS << "'" << (char)value << "'";
640    } else if (value < 256) {
641      OS << "'\\x" << llvm::format("%x", value) << "'";
642    } else {
643      // FIXME what to really do here?
644      OS << value;
645    }
646  }
647}
648
649void StmtPrinter::VisitIntegerLiteral(IntegerLiteral *Node) {
650  bool isSigned = Node->getType()->isSignedIntegerType();
651  OS << Node->getValue().toString(10, isSigned);
652
653  // Emit suffixes.  Integer literals are always a builtin integer type.
654  switch (Node->getType()->getAs<BuiltinType>()->getKind()) {
655  default: assert(0 && "Unexpected type for integer literal!");
656  case BuiltinType::Int:       break; // no suffix.
657  case BuiltinType::UInt:      OS << 'U'; break;
658  case BuiltinType::Long:      OS << 'L'; break;
659  case BuiltinType::ULong:     OS << "UL"; break;
660  case BuiltinType::LongLong:  OS << "LL"; break;
661  case BuiltinType::ULongLong: OS << "ULL"; break;
662  }
663}
664void StmtPrinter::VisitFloatingLiteral(FloatingLiteral *Node) {
665  // FIXME: print value more precisely.
666  OS << Node->getValueAsApproximateDouble();
667}
668
669void StmtPrinter::VisitImaginaryLiteral(ImaginaryLiteral *Node) {
670  PrintExpr(Node->getSubExpr());
671  OS << "i";
672}
673
674void StmtPrinter::VisitStringLiteral(StringLiteral *Str) {
675  if (Str->isWide()) OS << 'L';
676  OS << '"';
677
678  // FIXME: this doesn't print wstrings right.
679  llvm::StringRef StrData = Str->getString();
680  for (llvm::StringRef::iterator I = StrData.begin(), E = StrData.end();
681                                                             I != E; ++I) {
682    unsigned char Char = *I;
683
684    switch (Char) {
685    default:
686      if (isprint(Char))
687        OS << (char)Char;
688      else  // Output anything hard as an octal escape.
689        OS << '\\'
690        << (char)('0'+ ((Char >> 6) & 7))
691        << (char)('0'+ ((Char >> 3) & 7))
692        << (char)('0'+ ((Char >> 0) & 7));
693      break;
694    // Handle some common non-printable cases to make dumps prettier.
695    case '\\': OS << "\\\\"; break;
696    case '"': OS << "\\\""; break;
697    case '\n': OS << "\\n"; break;
698    case '\t': OS << "\\t"; break;
699    case '\a': OS << "\\a"; break;
700    case '\b': OS << "\\b"; break;
701    }
702  }
703  OS << '"';
704}
705void StmtPrinter::VisitParenExpr(ParenExpr *Node) {
706  OS << "(";
707  PrintExpr(Node->getSubExpr());
708  OS << ")";
709}
710void StmtPrinter::VisitUnaryOperator(UnaryOperator *Node) {
711  if (!Node->isPostfix()) {
712    OS << UnaryOperator::getOpcodeStr(Node->getOpcode());
713
714    // Print a space if this is an "identifier operator" like __real, or if
715    // it might be concatenated incorrectly like '+'.
716    switch (Node->getOpcode()) {
717    default: break;
718    case UO_Real:
719    case UO_Imag:
720    case UO_Extension:
721      OS << ' ';
722      break;
723    case UO_Plus:
724    case UO_Minus:
725      if (isa<UnaryOperator>(Node->getSubExpr()))
726        OS << ' ';
727      break;
728    }
729  }
730  PrintExpr(Node->getSubExpr());
731
732  if (Node->isPostfix())
733    OS << UnaryOperator::getOpcodeStr(Node->getOpcode());
734}
735
736void StmtPrinter::VisitOffsetOfExpr(OffsetOfExpr *Node) {
737  OS << "__builtin_offsetof(";
738  OS << Node->getTypeSourceInfo()->getType().getAsString(Policy) << ", ";
739  bool PrintedSomething = false;
740  for (unsigned i = 0, n = Node->getNumComponents(); i < n; ++i) {
741    OffsetOfExpr::OffsetOfNode ON = Node->getComponent(i);
742    if (ON.getKind() == OffsetOfExpr::OffsetOfNode::Array) {
743      // Array node
744      OS << "[";
745      PrintExpr(Node->getIndexExpr(ON.getArrayExprIndex()));
746      OS << "]";
747      PrintedSomething = true;
748      continue;
749    }
750
751    // Skip implicit base indirections.
752    if (ON.getKind() == OffsetOfExpr::OffsetOfNode::Base)
753      continue;
754
755    // Field or identifier node.
756    IdentifierInfo *Id = ON.getFieldName();
757    if (!Id)
758      continue;
759
760    if (PrintedSomething)
761      OS << ".";
762    else
763      PrintedSomething = true;
764    OS << Id->getName();
765  }
766  OS << ")";
767}
768
769void StmtPrinter::VisitUnaryExprOrTypeTraitExpr(UnaryExprOrTypeTraitExpr *Node){
770  switch(Node->getKind()) {
771  case UETT_SizeOf:
772    OS << "sizeof";
773    break;
774  case UETT_AlignOf:
775    OS << "__alignof";
776    break;
777  case UETT_VecStep:
778    OS << "vec_step";
779    break;
780  }
781  if (Node->isArgumentType())
782    OS << "(" << Node->getArgumentType().getAsString(Policy) << ")";
783  else {
784    OS << " ";
785    PrintExpr(Node->getArgumentExpr());
786  }
787}
788
789void StmtPrinter::VisitGenericSelectionExpr(GenericSelectionExpr *Node) {
790  OS << "_Generic(";
791  PrintExpr(Node->getControllingExpr());
792  for (unsigned i = 0; i != Node->getNumAssocs(); ++i) {
793    OS << ", ";
794    QualType T = Node->getAssocType(i);
795    if (T.isNull())
796      OS << "default";
797    else
798      OS << T.getAsString(Policy);
799    OS << ": ";
800    PrintExpr(Node->getAssocExpr(i));
801  }
802  OS << ")";
803}
804
805void StmtPrinter::VisitArraySubscriptExpr(ArraySubscriptExpr *Node) {
806  PrintExpr(Node->getLHS());
807  OS << "[";
808  PrintExpr(Node->getRHS());
809  OS << "]";
810}
811
812void StmtPrinter::PrintCallArgs(CallExpr *Call) {
813  for (unsigned i = 0, e = Call->getNumArgs(); i != e; ++i) {
814    if (isa<CXXDefaultArgExpr>(Call->getArg(i))) {
815      // Don't print any defaulted arguments
816      break;
817    }
818
819    if (i) OS << ", ";
820    PrintExpr(Call->getArg(i));
821  }
822}
823
824void StmtPrinter::VisitCallExpr(CallExpr *Call) {
825  PrintExpr(Call->getCallee());
826  OS << "(";
827  PrintCallArgs(Call);
828  OS << ")";
829}
830void StmtPrinter::VisitMemberExpr(MemberExpr *Node) {
831  // FIXME: Suppress printing implicit bases (like "this")
832  PrintExpr(Node->getBase());
833  if (FieldDecl *FD = dyn_cast<FieldDecl>(Node->getMemberDecl()))
834    if (FD->isAnonymousStructOrUnion())
835      return;
836  OS << (Node->isArrow() ? "->" : ".");
837  if (NestedNameSpecifier *Qualifier = Node->getQualifier())
838    Qualifier->print(OS, Policy);
839
840  OS << Node->getMemberNameInfo();
841
842  if (Node->hasExplicitTemplateArgs())
843    OS << TemplateSpecializationType::PrintTemplateArgumentList(
844                                                    Node->getTemplateArgs(),
845                                                    Node->getNumTemplateArgs(),
846                                                                Policy);
847}
848void StmtPrinter::VisitObjCIsaExpr(ObjCIsaExpr *Node) {
849  PrintExpr(Node->getBase());
850  OS << (Node->isArrow() ? "->isa" : ".isa");
851}
852
853void StmtPrinter::VisitExtVectorElementExpr(ExtVectorElementExpr *Node) {
854  PrintExpr(Node->getBase());
855  OS << ".";
856  OS << Node->getAccessor().getName();
857}
858void StmtPrinter::VisitCStyleCastExpr(CStyleCastExpr *Node) {
859  OS << "(" << Node->getType().getAsString(Policy) << ")";
860  PrintExpr(Node->getSubExpr());
861}
862void StmtPrinter::VisitCompoundLiteralExpr(CompoundLiteralExpr *Node) {
863  OS << "(" << Node->getType().getAsString(Policy) << ")";
864  PrintExpr(Node->getInitializer());
865}
866void StmtPrinter::VisitImplicitCastExpr(ImplicitCastExpr *Node) {
867  // No need to print anything, simply forward to the sub expression.
868  PrintExpr(Node->getSubExpr());
869}
870void StmtPrinter::VisitBinaryOperator(BinaryOperator *Node) {
871  PrintExpr(Node->getLHS());
872  OS << " " << BinaryOperator::getOpcodeStr(Node->getOpcode()) << " ";
873  PrintExpr(Node->getRHS());
874}
875void StmtPrinter::VisitCompoundAssignOperator(CompoundAssignOperator *Node) {
876  PrintExpr(Node->getLHS());
877  OS << " " << BinaryOperator::getOpcodeStr(Node->getOpcode()) << " ";
878  PrintExpr(Node->getRHS());
879}
880void StmtPrinter::VisitConditionalOperator(ConditionalOperator *Node) {
881  PrintExpr(Node->getCond());
882  OS << " ? ";
883  PrintExpr(Node->getLHS());
884  OS << " : ";
885  PrintExpr(Node->getRHS());
886}
887
888// GNU extensions.
889
890void
891StmtPrinter::VisitBinaryConditionalOperator(BinaryConditionalOperator *Node) {
892  PrintExpr(Node->getCommon());
893  OS << " ?: ";
894  PrintExpr(Node->getFalseExpr());
895}
896void StmtPrinter::VisitAddrLabelExpr(AddrLabelExpr *Node) {
897  OS << "&&" << Node->getLabel()->getName();
898}
899
900void StmtPrinter::VisitStmtExpr(StmtExpr *E) {
901  OS << "(";
902  PrintRawCompoundStmt(E->getSubStmt());
903  OS << ")";
904}
905
906void StmtPrinter::VisitChooseExpr(ChooseExpr *Node) {
907  OS << "__builtin_choose_expr(";
908  PrintExpr(Node->getCond());
909  OS << ", ";
910  PrintExpr(Node->getLHS());
911  OS << ", ";
912  PrintExpr(Node->getRHS());
913  OS << ")";
914}
915
916void StmtPrinter::VisitGNUNullExpr(GNUNullExpr *) {
917  OS << "__null";
918}
919
920void StmtPrinter::VisitShuffleVectorExpr(ShuffleVectorExpr *Node) {
921  OS << "__builtin_shufflevector(";
922  for (unsigned i = 0, e = Node->getNumSubExprs(); i != e; ++i) {
923    if (i) OS << ", ";
924    PrintExpr(Node->getExpr(i));
925  }
926  OS << ")";
927}
928
929void StmtPrinter::VisitInitListExpr(InitListExpr* Node) {
930  if (Node->getSyntacticForm()) {
931    Visit(Node->getSyntacticForm());
932    return;
933  }
934
935  OS << "{ ";
936  for (unsigned i = 0, e = Node->getNumInits(); i != e; ++i) {
937    if (i) OS << ", ";
938    if (Node->getInit(i))
939      PrintExpr(Node->getInit(i));
940    else
941      OS << "0";
942  }
943  OS << " }";
944}
945
946void StmtPrinter::VisitParenListExpr(ParenListExpr* Node) {
947  OS << "( ";
948  for (unsigned i = 0, e = Node->getNumExprs(); i != e; ++i) {
949    if (i) OS << ", ";
950    PrintExpr(Node->getExpr(i));
951  }
952  OS << " )";
953}
954
955void StmtPrinter::VisitDesignatedInitExpr(DesignatedInitExpr *Node) {
956  for (DesignatedInitExpr::designators_iterator D = Node->designators_begin(),
957                      DEnd = Node->designators_end();
958       D != DEnd; ++D) {
959    if (D->isFieldDesignator()) {
960      if (D->getDotLoc().isInvalid())
961        OS << D->getFieldName()->getName() << ":";
962      else
963        OS << "." << D->getFieldName()->getName();
964    } else {
965      OS << "[";
966      if (D->isArrayDesignator()) {
967        PrintExpr(Node->getArrayIndex(*D));
968      } else {
969        PrintExpr(Node->getArrayRangeStart(*D));
970        OS << " ... ";
971        PrintExpr(Node->getArrayRangeEnd(*D));
972      }
973      OS << "]";
974    }
975  }
976
977  OS << " = ";
978  PrintExpr(Node->getInit());
979}
980
981void StmtPrinter::VisitImplicitValueInitExpr(ImplicitValueInitExpr *Node) {
982  if (Policy.LangOpts.CPlusPlus)
983    OS << "/*implicit*/" << Node->getType().getAsString(Policy) << "()";
984  else {
985    OS << "/*implicit*/(" << Node->getType().getAsString(Policy) << ")";
986    if (Node->getType()->isRecordType())
987      OS << "{}";
988    else
989      OS << 0;
990  }
991}
992
993void StmtPrinter::VisitVAArgExpr(VAArgExpr *Node) {
994  OS << "__builtin_va_arg(";
995  PrintExpr(Node->getSubExpr());
996  OS << ", ";
997  OS << Node->getType().getAsString(Policy);
998  OS << ")";
999}
1000
1001// C++
1002void StmtPrinter::VisitCXXOperatorCallExpr(CXXOperatorCallExpr *Node) {
1003  const char *OpStrings[NUM_OVERLOADED_OPERATORS] = {
1004    "",
1005#define OVERLOADED_OPERATOR(Name,Spelling,Token,Unary,Binary,MemberOnly) \
1006    Spelling,
1007#include "clang/Basic/OperatorKinds.def"
1008  };
1009
1010  OverloadedOperatorKind Kind = Node->getOperator();
1011  if (Kind == OO_PlusPlus || Kind == OO_MinusMinus) {
1012    if (Node->getNumArgs() == 1) {
1013      OS << OpStrings[Kind] << ' ';
1014      PrintExpr(Node->getArg(0));
1015    } else {
1016      PrintExpr(Node->getArg(0));
1017      OS << ' ' << OpStrings[Kind];
1018    }
1019  } else if (Kind == OO_Call) {
1020    PrintExpr(Node->getArg(0));
1021    OS << '(';
1022    for (unsigned ArgIdx = 1; ArgIdx < Node->getNumArgs(); ++ArgIdx) {
1023      if (ArgIdx > 1)
1024        OS << ", ";
1025      if (!isa<CXXDefaultArgExpr>(Node->getArg(ArgIdx)))
1026        PrintExpr(Node->getArg(ArgIdx));
1027    }
1028    OS << ')';
1029  } else if (Kind == OO_Subscript) {
1030    PrintExpr(Node->getArg(0));
1031    OS << '[';
1032    PrintExpr(Node->getArg(1));
1033    OS << ']';
1034  } else if (Node->getNumArgs() == 1) {
1035    OS << OpStrings[Kind] << ' ';
1036    PrintExpr(Node->getArg(0));
1037  } else if (Node->getNumArgs() == 2) {
1038    PrintExpr(Node->getArg(0));
1039    OS << ' ' << OpStrings[Kind] << ' ';
1040    PrintExpr(Node->getArg(1));
1041  } else {
1042    assert(false && "unknown overloaded operator");
1043  }
1044}
1045
1046void StmtPrinter::VisitCXXMemberCallExpr(CXXMemberCallExpr *Node) {
1047  VisitCallExpr(cast<CallExpr>(Node));
1048}
1049
1050void StmtPrinter::VisitCUDAKernelCallExpr(CUDAKernelCallExpr *Node) {
1051  PrintExpr(Node->getCallee());
1052  OS << "<<<";
1053  PrintCallArgs(Node->getConfig());
1054  OS << ">>>(";
1055  PrintCallArgs(Node);
1056  OS << ")";
1057}
1058
1059void StmtPrinter::VisitCXXNamedCastExpr(CXXNamedCastExpr *Node) {
1060  OS << Node->getCastName() << '<';
1061  OS << Node->getTypeAsWritten().getAsString(Policy) << ">(";
1062  PrintExpr(Node->getSubExpr());
1063  OS << ")";
1064}
1065
1066void StmtPrinter::VisitCXXStaticCastExpr(CXXStaticCastExpr *Node) {
1067  VisitCXXNamedCastExpr(Node);
1068}
1069
1070void StmtPrinter::VisitCXXDynamicCastExpr(CXXDynamicCastExpr *Node) {
1071  VisitCXXNamedCastExpr(Node);
1072}
1073
1074void StmtPrinter::VisitCXXReinterpretCastExpr(CXXReinterpretCastExpr *Node) {
1075  VisitCXXNamedCastExpr(Node);
1076}
1077
1078void StmtPrinter::VisitCXXConstCastExpr(CXXConstCastExpr *Node) {
1079  VisitCXXNamedCastExpr(Node);
1080}
1081
1082void StmtPrinter::VisitCXXTypeidExpr(CXXTypeidExpr *Node) {
1083  OS << "typeid(";
1084  if (Node->isTypeOperand()) {
1085    OS << Node->getTypeOperand().getAsString(Policy);
1086  } else {
1087    PrintExpr(Node->getExprOperand());
1088  }
1089  OS << ")";
1090}
1091
1092void StmtPrinter::VisitCXXUuidofExpr(CXXUuidofExpr *Node) {
1093  OS << "__uuidof(";
1094  if (Node->isTypeOperand()) {
1095    OS << Node->getTypeOperand().getAsString(Policy);
1096  } else {
1097    PrintExpr(Node->getExprOperand());
1098  }
1099  OS << ")";
1100}
1101
1102void StmtPrinter::VisitCXXBoolLiteralExpr(CXXBoolLiteralExpr *Node) {
1103  OS << (Node->getValue() ? "true" : "false");
1104}
1105
1106void StmtPrinter::VisitCXXNullPtrLiteralExpr(CXXNullPtrLiteralExpr *Node) {
1107  OS << "nullptr";
1108}
1109
1110void StmtPrinter::VisitCXXThisExpr(CXXThisExpr *Node) {
1111  OS << "this";
1112}
1113
1114void StmtPrinter::VisitCXXThrowExpr(CXXThrowExpr *Node) {
1115  if (Node->getSubExpr() == 0)
1116    OS << "throw";
1117  else {
1118    OS << "throw ";
1119    PrintExpr(Node->getSubExpr());
1120  }
1121}
1122
1123void StmtPrinter::VisitCXXDefaultArgExpr(CXXDefaultArgExpr *Node) {
1124  // Nothing to print: we picked up the default argument
1125}
1126
1127void StmtPrinter::VisitCXXFunctionalCastExpr(CXXFunctionalCastExpr *Node) {
1128  OS << Node->getType().getAsString(Policy);
1129  OS << "(";
1130  PrintExpr(Node->getSubExpr());
1131  OS << ")";
1132}
1133
1134void StmtPrinter::VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *Node) {
1135  PrintExpr(Node->getSubExpr());
1136}
1137
1138void StmtPrinter::VisitCXXTemporaryObjectExpr(CXXTemporaryObjectExpr *Node) {
1139  OS << Node->getType().getAsString(Policy);
1140  OS << "(";
1141  for (CXXTemporaryObjectExpr::arg_iterator Arg = Node->arg_begin(),
1142                                         ArgEnd = Node->arg_end();
1143       Arg != ArgEnd; ++Arg) {
1144    if (Arg != Node->arg_begin())
1145      OS << ", ";
1146    PrintExpr(*Arg);
1147  }
1148  OS << ")";
1149}
1150
1151void StmtPrinter::VisitCXXScalarValueInitExpr(CXXScalarValueInitExpr *Node) {
1152  if (TypeSourceInfo *TSInfo = Node->getTypeSourceInfo())
1153    OS << TSInfo->getType().getAsString(Policy) << "()";
1154  else
1155    OS << Node->getType().getAsString(Policy) << "()";
1156}
1157
1158void StmtPrinter::VisitCXXNewExpr(CXXNewExpr *E) {
1159  if (E->isGlobalNew())
1160    OS << "::";
1161  OS << "new ";
1162  unsigned NumPlace = E->getNumPlacementArgs();
1163  if (NumPlace > 0) {
1164    OS << "(";
1165    PrintExpr(E->getPlacementArg(0));
1166    for (unsigned i = 1; i < NumPlace; ++i) {
1167      OS << ", ";
1168      PrintExpr(E->getPlacementArg(i));
1169    }
1170    OS << ") ";
1171  }
1172  if (E->isParenTypeId())
1173    OS << "(";
1174  std::string TypeS;
1175  if (Expr *Size = E->getArraySize()) {
1176    llvm::raw_string_ostream s(TypeS);
1177    Size->printPretty(s, Context, Helper, Policy);
1178    s.flush();
1179    TypeS = "[" + TypeS + "]";
1180  }
1181  E->getAllocatedType().getAsStringInternal(TypeS, Policy);
1182  OS << TypeS;
1183  if (E->isParenTypeId())
1184    OS << ")";
1185
1186  if (E->hasInitializer()) {
1187    OS << "(";
1188    unsigned NumCons = E->getNumConstructorArgs();
1189    if (NumCons > 0) {
1190      PrintExpr(E->getConstructorArg(0));
1191      for (unsigned i = 1; i < NumCons; ++i) {
1192        OS << ", ";
1193        PrintExpr(E->getConstructorArg(i));
1194      }
1195    }
1196    OS << ")";
1197  }
1198}
1199
1200void StmtPrinter::VisitCXXDeleteExpr(CXXDeleteExpr *E) {
1201  if (E->isGlobalDelete())
1202    OS << "::";
1203  OS << "delete ";
1204  if (E->isArrayForm())
1205    OS << "[] ";
1206  PrintExpr(E->getArgument());
1207}
1208
1209void StmtPrinter::VisitCXXPseudoDestructorExpr(CXXPseudoDestructorExpr *E) {
1210  PrintExpr(E->getBase());
1211  if (E->isArrow())
1212    OS << "->";
1213  else
1214    OS << '.';
1215  if (E->getQualifier())
1216    E->getQualifier()->print(OS, Policy);
1217
1218  std::string TypeS;
1219  if (IdentifierInfo *II = E->getDestroyedTypeIdentifier())
1220    OS << II->getName();
1221  else
1222    E->getDestroyedType().getAsStringInternal(TypeS, Policy);
1223  OS << TypeS;
1224}
1225
1226void StmtPrinter::VisitCXXConstructExpr(CXXConstructExpr *E) {
1227  for (unsigned i = 0, e = E->getNumArgs(); i != e; ++i) {
1228    if (isa<CXXDefaultArgExpr>(E->getArg(i))) {
1229      // Don't print any defaulted arguments
1230      break;
1231    }
1232
1233    if (i) OS << ", ";
1234    PrintExpr(E->getArg(i));
1235  }
1236}
1237
1238void StmtPrinter::VisitExprWithCleanups(ExprWithCleanups *E) {
1239  // Just forward to the sub expression.
1240  PrintExpr(E->getSubExpr());
1241}
1242
1243void
1244StmtPrinter::VisitCXXUnresolvedConstructExpr(
1245                                           CXXUnresolvedConstructExpr *Node) {
1246  OS << Node->getTypeAsWritten().getAsString(Policy);
1247  OS << "(";
1248  for (CXXUnresolvedConstructExpr::arg_iterator Arg = Node->arg_begin(),
1249                                             ArgEnd = Node->arg_end();
1250       Arg != ArgEnd; ++Arg) {
1251    if (Arg != Node->arg_begin())
1252      OS << ", ";
1253    PrintExpr(*Arg);
1254  }
1255  OS << ")";
1256}
1257
1258void StmtPrinter::VisitCXXDependentScopeMemberExpr(
1259                                         CXXDependentScopeMemberExpr *Node) {
1260  if (!Node->isImplicitAccess()) {
1261    PrintExpr(Node->getBase());
1262    OS << (Node->isArrow() ? "->" : ".");
1263  }
1264  if (NestedNameSpecifier *Qualifier = Node->getQualifier())
1265    Qualifier->print(OS, Policy);
1266  else if (Node->hasExplicitTemplateArgs())
1267    // FIXME: Track use of "template" keyword explicitly?
1268    OS << "template ";
1269
1270  OS << Node->getMemberNameInfo();
1271
1272  if (Node->hasExplicitTemplateArgs()) {
1273    OS << TemplateSpecializationType::PrintTemplateArgumentList(
1274                                                    Node->getTemplateArgs(),
1275                                                    Node->getNumTemplateArgs(),
1276                                                    Policy);
1277  }
1278}
1279
1280void StmtPrinter::VisitUnresolvedMemberExpr(UnresolvedMemberExpr *Node) {
1281  if (!Node->isImplicitAccess()) {
1282    PrintExpr(Node->getBase());
1283    OS << (Node->isArrow() ? "->" : ".");
1284  }
1285  if (NestedNameSpecifier *Qualifier = Node->getQualifier())
1286    Qualifier->print(OS, Policy);
1287
1288  // FIXME: this might originally have been written with 'template'
1289
1290  OS << Node->getMemberNameInfo();
1291
1292  if (Node->hasExplicitTemplateArgs()) {
1293    OS << TemplateSpecializationType::PrintTemplateArgumentList(
1294                                                    Node->getTemplateArgs(),
1295                                                    Node->getNumTemplateArgs(),
1296                                                    Policy);
1297  }
1298}
1299
1300static const char *getTypeTraitName(UnaryTypeTrait UTT) {
1301  switch (UTT) {
1302  case UTT_HasNothrowAssign:      return "__has_nothrow_assign";
1303  case UTT_HasNothrowConstructor: return "__has_nothrow_constructor";
1304  case UTT_HasNothrowCopy:          return "__has_nothrow_copy";
1305  case UTT_HasTrivialAssign:      return "__has_trivial_assign";
1306  case UTT_HasTrivialDefaultConstructor: return "__has_trivial_constructor";
1307  case UTT_HasTrivialCopy:          return "__has_trivial_copy";
1308  case UTT_HasTrivialDestructor:  return "__has_trivial_destructor";
1309  case UTT_HasVirtualDestructor:  return "__has_virtual_destructor";
1310  case UTT_IsAbstract:            return "__is_abstract";
1311  case UTT_IsArithmetic:            return "__is_arithmetic";
1312  case UTT_IsArray:                 return "__is_array";
1313  case UTT_IsClass:               return "__is_class";
1314  case UTT_IsCompleteType:          return "__is_complete_type";
1315  case UTT_IsCompound:              return "__is_compound";
1316  case UTT_IsConst:                 return "__is_const";
1317  case UTT_IsEmpty:               return "__is_empty";
1318  case UTT_IsEnum:                return "__is_enum";
1319  case UTT_IsFloatingPoint:         return "__is_floating_point";
1320  case UTT_IsFunction:              return "__is_function";
1321  case UTT_IsFundamental:           return "__is_fundamental";
1322  case UTT_IsIntegral:              return "__is_integral";
1323  case UTT_IsLiteral:               return "__is_literal";
1324  case UTT_IsLvalueReference:       return "__is_lvalue_reference";
1325  case UTT_IsMemberFunctionPointer: return "__is_member_function_pointer";
1326  case UTT_IsMemberObjectPointer:   return "__is_member_object_pointer";
1327  case UTT_IsMemberPointer:         return "__is_member_pointer";
1328  case UTT_IsObject:                return "__is_object";
1329  case UTT_IsPOD:                 return "__is_pod";
1330  case UTT_IsPointer:               return "__is_pointer";
1331  case UTT_IsPolymorphic:         return "__is_polymorphic";
1332  case UTT_IsReference:             return "__is_reference";
1333  case UTT_IsRvalueReference:       return "__is_rvalue_reference";
1334  case UTT_IsScalar:                return "__is_scalar";
1335  case UTT_IsSigned:                return "__is_signed";
1336  case UTT_IsStandardLayout:        return "__is_standard_layout";
1337  case UTT_IsTrivial:               return "__is_trivial";
1338  case UTT_IsTriviallyCopyable:     return "__is_trivially_copyable";
1339  case UTT_IsUnion:               return "__is_union";
1340  case UTT_IsUnsigned:              return "__is_unsigned";
1341  case UTT_IsVoid:                  return "__is_void";
1342  case UTT_IsVolatile:              return "__is_volatile";
1343  }
1344  llvm_unreachable("Type trait not covered by switch statement");
1345}
1346
1347static const char *getTypeTraitName(BinaryTypeTrait BTT) {
1348  switch (BTT) {
1349  case BTT_IsBaseOf:         return "__is_base_of";
1350  case BTT_IsConvertible:    return "__is_convertible";
1351  case BTT_IsSame:           return "__is_same";
1352  case BTT_TypeCompatible:   return "__builtin_types_compatible_p";
1353  case BTT_IsConvertibleTo:  return "__is_convertible_to";
1354  }
1355  llvm_unreachable("Binary type trait not covered by switch");
1356}
1357
1358static const char *getTypeTraitName(ArrayTypeTrait ATT) {
1359  switch (ATT) {
1360  case ATT_ArrayRank:        return "__array_rank";
1361  case ATT_ArrayExtent:      return "__array_extent";
1362  }
1363  llvm_unreachable("Array type trait not covered by switch");
1364}
1365
1366static const char *getExpressionTraitName(ExpressionTrait ET) {
1367  switch (ET) {
1368  case ET_IsLValueExpr:      return "__is_lvalue_expr";
1369  case ET_IsRValueExpr:      return "__is_rvalue_expr";
1370  }
1371  llvm_unreachable("Expression type trait not covered by switch");
1372}
1373
1374void StmtPrinter::VisitUnaryTypeTraitExpr(UnaryTypeTraitExpr *E) {
1375  OS << getTypeTraitName(E->getTrait()) << "("
1376     << E->getQueriedType().getAsString(Policy) << ")";
1377}
1378
1379void StmtPrinter::VisitBinaryTypeTraitExpr(BinaryTypeTraitExpr *E) {
1380  OS << getTypeTraitName(E->getTrait()) << "("
1381     << E->getLhsType().getAsString(Policy) << ","
1382     << E->getRhsType().getAsString(Policy) << ")";
1383}
1384
1385void StmtPrinter::VisitArrayTypeTraitExpr(ArrayTypeTraitExpr *E) {
1386  OS << getTypeTraitName(E->getTrait()) << "("
1387     << E->getQueriedType().getAsString(Policy) << ")";
1388}
1389
1390void StmtPrinter::VisitExpressionTraitExpr(ExpressionTraitExpr *E) {
1391    OS << getExpressionTraitName(E->getTrait()) << "(";
1392    PrintExpr(E->getQueriedExpression());
1393    OS << ")";
1394}
1395
1396void StmtPrinter::VisitCXXNoexceptExpr(CXXNoexceptExpr *E) {
1397  OS << "noexcept(";
1398  PrintExpr(E->getOperand());
1399  OS << ")";
1400}
1401
1402void StmtPrinter::VisitPackExpansionExpr(PackExpansionExpr *E) {
1403  PrintExpr(E->getPattern());
1404  OS << "...";
1405}
1406
1407void StmtPrinter::VisitSizeOfPackExpr(SizeOfPackExpr *E) {
1408  OS << "sizeof...(" << E->getPack()->getNameAsString() << ")";
1409}
1410
1411void StmtPrinter::VisitSubstNonTypeTemplateParmPackExpr(
1412                                       SubstNonTypeTemplateParmPackExpr *Node) {
1413  OS << Node->getParameterPack()->getNameAsString();
1414}
1415
1416void StmtPrinter::VisitMaterializeTemporaryExpr(MaterializeTemporaryExpr *Node){
1417  PrintExpr(Node->GetTemporaryExpr());
1418}
1419
1420// Obj-C
1421
1422void StmtPrinter::VisitObjCStringLiteral(ObjCStringLiteral *Node) {
1423  OS << "@";
1424  VisitStringLiteral(Node->getString());
1425}
1426
1427void StmtPrinter::VisitObjCEncodeExpr(ObjCEncodeExpr *Node) {
1428  OS << "@encode(" << Node->getEncodedType().getAsString(Policy) << ')';
1429}
1430
1431void StmtPrinter::VisitObjCSelectorExpr(ObjCSelectorExpr *Node) {
1432  OS << "@selector(" << Node->getSelector().getAsString() << ')';
1433}
1434
1435void StmtPrinter::VisitObjCProtocolExpr(ObjCProtocolExpr *Node) {
1436  OS << "@protocol(" << Node->getProtocol() << ')';
1437}
1438
1439void StmtPrinter::VisitObjCMessageExpr(ObjCMessageExpr *Mess) {
1440  OS << "[";
1441  switch (Mess->getReceiverKind()) {
1442  case ObjCMessageExpr::Instance:
1443    PrintExpr(Mess->getInstanceReceiver());
1444    break;
1445
1446  case ObjCMessageExpr::Class:
1447    OS << Mess->getClassReceiver().getAsString(Policy);
1448    break;
1449
1450  case ObjCMessageExpr::SuperInstance:
1451  case ObjCMessageExpr::SuperClass:
1452    OS << "Super";
1453    break;
1454  }
1455
1456  OS << ' ';
1457  Selector selector = Mess->getSelector();
1458  if (selector.isUnarySelector()) {
1459    OS << selector.getNameForSlot(0);
1460  } else {
1461    for (unsigned i = 0, e = Mess->getNumArgs(); i != e; ++i) {
1462      if (i < selector.getNumArgs()) {
1463        if (i > 0) OS << ' ';
1464        if (selector.getIdentifierInfoForSlot(i))
1465          OS << selector.getIdentifierInfoForSlot(i)->getName() << ':';
1466        else
1467           OS << ":";
1468      }
1469      else OS << ", "; // Handle variadic methods.
1470
1471      PrintExpr(Mess->getArg(i));
1472    }
1473  }
1474  OS << "]";
1475}
1476
1477void
1478StmtPrinter::VisitObjCIndirectCopyRestoreExpr(ObjCIndirectCopyRestoreExpr *E) {
1479  PrintExpr(E->getSubExpr());
1480}
1481
1482void
1483StmtPrinter::VisitObjCBridgedCastExpr(ObjCBridgedCastExpr *E) {
1484  OS << "(" << E->getBridgeKindName() << E->getType().getAsString(Policy)
1485     << ")";
1486  PrintExpr(E->getSubExpr());
1487}
1488
1489void StmtPrinter::VisitBlockExpr(BlockExpr *Node) {
1490  BlockDecl *BD = Node->getBlockDecl();
1491  OS << "^";
1492
1493  const FunctionType *AFT = Node->getFunctionType();
1494
1495  if (isa<FunctionNoProtoType>(AFT)) {
1496    OS << "()";
1497  } else if (!BD->param_empty() || cast<FunctionProtoType>(AFT)->isVariadic()) {
1498    OS << '(';
1499    std::string ParamStr;
1500    for (BlockDecl::param_iterator AI = BD->param_begin(),
1501         E = BD->param_end(); AI != E; ++AI) {
1502      if (AI != BD->param_begin()) OS << ", ";
1503      ParamStr = (*AI)->getNameAsString();
1504      (*AI)->getType().getAsStringInternal(ParamStr, Policy);
1505      OS << ParamStr;
1506    }
1507
1508    const FunctionProtoType *FT = cast<FunctionProtoType>(AFT);
1509    if (FT->isVariadic()) {
1510      if (!BD->param_empty()) OS << ", ";
1511      OS << "...";
1512    }
1513    OS << ')';
1514  }
1515}
1516
1517void StmtPrinter::VisitBlockDeclRefExpr(BlockDeclRefExpr *Node) {
1518  OS << Node->getDecl();
1519}
1520
1521void StmtPrinter::VisitOpaqueValueExpr(OpaqueValueExpr *Node) {}
1522
1523void StmtPrinter::VisitAsTypeExpr(AsTypeExpr *Node) {
1524  OS << "__builtin_astype(";
1525  PrintExpr(Node->getSrcExpr());
1526  OS << ", " << Node->getType().getAsString();
1527  OS << ")";
1528}
1529
1530//===----------------------------------------------------------------------===//
1531// Stmt method implementations
1532//===----------------------------------------------------------------------===//
1533
1534void Stmt::dumpPretty(ASTContext& Context) const {
1535  printPretty(llvm::errs(), Context, 0,
1536              PrintingPolicy(Context.getLangOptions()));
1537}
1538
1539void Stmt::printPretty(llvm::raw_ostream &OS, ASTContext& Context,
1540                       PrinterHelper* Helper,
1541                       const PrintingPolicy &Policy,
1542                       unsigned Indentation) const {
1543  if (this == 0) {
1544    OS << "<NULL>";
1545    return;
1546  }
1547
1548  if (Policy.Dump && &Context) {
1549    dump(OS, Context.getSourceManager());
1550    return;
1551  }
1552
1553  StmtPrinter P(OS, Context, Helper, Policy, Indentation);
1554  P.Visit(const_cast<Stmt*>(this));
1555}
1556
1557//===----------------------------------------------------------------------===//
1558// PrinterHelper
1559//===----------------------------------------------------------------------===//
1560
1561// Implement virtual destructor.
1562PrinterHelper::~PrinterHelper() {}
1563