StmtPrinter.cpp revision a71d819bb8f50c28938db0f2867d3fb6e2ce5910 
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/Compiler.h"
20#include "llvm/Support/Format.h"
21using namespace clang;
22
23//===----------------------------------------------------------------------===//
24// StmtPrinter Visitor
25//===----------------------------------------------------------------------===//
26
27namespace  {
28  class VISIBILITY_HIDDEN 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    bool PrintOffsetOfDesignator(Expr *E);
81    void VisitUnaryOffsetOf(UnaryOperator *Node);
82
83    void Visit(Stmt* S) {
84      if (Helper && Helper->handledStmt(S,OS))
85          return;
86      else StmtVisitor<StmtPrinter>::Visit(S);
87    }
88
89    void VisitStmt(Stmt *Node);
90#define STMT(CLASS, PARENT) \
91    void Visit##CLASS(CLASS *Node);
92#include "clang/AST/StmtNodes.def"
93  };
94}
95
96//===----------------------------------------------------------------------===//
97//  Stmt printing methods.
98//===----------------------------------------------------------------------===//
99
100void StmtPrinter::VisitStmt(Stmt *Node) {
101  Indent() << "<<unknown stmt type>>\n";
102}
103
104/// PrintRawCompoundStmt - Print a compound stmt without indenting the {, and
105/// with no newline after the }.
106void StmtPrinter::PrintRawCompoundStmt(CompoundStmt *Node) {
107  OS << "{\n";
108  for (CompoundStmt::body_iterator I = Node->body_begin(), E = Node->body_end();
109       I != E; ++I)
110    PrintStmt(*I);
111
112  Indent() << "}";
113}
114
115void StmtPrinter::PrintRawDecl(Decl *D) {
116  D->print(OS, Policy, IndentLevel);
117}
118
119void StmtPrinter::PrintRawDeclStmt(DeclStmt *S) {
120  DeclStmt::decl_iterator Begin = S->decl_begin(), End = S->decl_end();
121  llvm::SmallVector<Decl*, 2> Decls;
122  for ( ; Begin != End; ++Begin)
123    Decls.push_back(*Begin);
124
125  Decl::printGroup(Decls.data(), Decls.size(), OS, Policy, IndentLevel);
126}
127
128void StmtPrinter::VisitNullStmt(NullStmt *Node) {
129  Indent() << ";\n";
130}
131
132void StmtPrinter::VisitDeclStmt(DeclStmt *Node) {
133  Indent();
134  PrintRawDeclStmt(Node);
135  OS << ";\n";
136}
137
138void StmtPrinter::VisitCompoundStmt(CompoundStmt *Node) {
139  Indent();
140  PrintRawCompoundStmt(Node);
141  OS << "\n";
142}
143
144void StmtPrinter::VisitCaseStmt(CaseStmt *Node) {
145  Indent(-1) << "case ";
146  PrintExpr(Node->getLHS());
147  if (Node->getRHS()) {
148    OS << " ... ";
149    PrintExpr(Node->getRHS());
150  }
151  OS << ":\n";
152
153  PrintStmt(Node->getSubStmt(), 0);
154}
155
156void StmtPrinter::VisitDefaultStmt(DefaultStmt *Node) {
157  Indent(-1) << "default:\n";
158  PrintStmt(Node->getSubStmt(), 0);
159}
160
161void StmtPrinter::VisitLabelStmt(LabelStmt *Node) {
162  Indent(-1) << Node->getName() << ":\n";
163  PrintStmt(Node->getSubStmt(), 0);
164}
165
166void StmtPrinter::PrintRawIfStmt(IfStmt *If) {
167  OS << "if (";
168  PrintExpr(If->getCond());
169  OS << ')';
170
171  if (CompoundStmt *CS = dyn_cast<CompoundStmt>(If->getThen())) {
172    OS << ' ';
173    PrintRawCompoundStmt(CS);
174    OS << (If->getElse() ? ' ' : '\n');
175  } else {
176    OS << '\n';
177    PrintStmt(If->getThen());
178    if (If->getElse()) Indent();
179  }
180
181  if (Stmt *Else = If->getElse()) {
182    OS << "else";
183
184    if (CompoundStmt *CS = dyn_cast<CompoundStmt>(Else)) {
185      OS << ' ';
186      PrintRawCompoundStmt(CS);
187      OS << '\n';
188    } else if (IfStmt *ElseIf = dyn_cast<IfStmt>(Else)) {
189      OS << ' ';
190      PrintRawIfStmt(ElseIf);
191    } else {
192      OS << '\n';
193      PrintStmt(If->getElse());
194    }
195  }
196}
197
198void StmtPrinter::VisitIfStmt(IfStmt *If) {
199  Indent();
200  PrintRawIfStmt(If);
201}
202
203void StmtPrinter::VisitSwitchStmt(SwitchStmt *Node) {
204  Indent() << "switch (";
205  PrintExpr(Node->getCond());
206  OS << ")";
207
208  // Pretty print compoundstmt bodies (very common).
209  if (CompoundStmt *CS = dyn_cast<CompoundStmt>(Node->getBody())) {
210    OS << " ";
211    PrintRawCompoundStmt(CS);
212    OS << "\n";
213  } else {
214    OS << "\n";
215    PrintStmt(Node->getBody());
216  }
217}
218
219void StmtPrinter::VisitSwitchCase(SwitchCase*) {
220  assert(0 && "SwitchCase is an abstract class");
221}
222
223void StmtPrinter::VisitWhileStmt(WhileStmt *Node) {
224  Indent() << "while (";
225  PrintExpr(Node->getCond());
226  OS << ")\n";
227  PrintStmt(Node->getBody());
228}
229
230void StmtPrinter::VisitDoStmt(DoStmt *Node) {
231  Indent() << "do ";
232  if (CompoundStmt *CS = dyn_cast<CompoundStmt>(Node->getBody())) {
233    PrintRawCompoundStmt(CS);
234    OS << " ";
235  } else {
236    OS << "\n";
237    PrintStmt(Node->getBody());
238    Indent();
239  }
240
241  OS << "while (";
242  PrintExpr(Node->getCond());
243  OS << ");\n";
244}
245
246void StmtPrinter::VisitForStmt(ForStmt *Node) {
247  Indent() << "for (";
248  if (Node->getInit()) {
249    if (DeclStmt *DS = dyn_cast<DeclStmt>(Node->getInit()))
250      PrintRawDeclStmt(DS);
251    else
252      PrintExpr(cast<Expr>(Node->getInit()));
253  }
254  OS << ";";
255  if (Node->getCond()) {
256    OS << " ";
257    PrintExpr(Node->getCond());
258  }
259  OS << ";";
260  if (Node->getInc()) {
261    OS << " ";
262    PrintExpr(Node->getInc());
263  }
264  OS << ") ";
265
266  if (CompoundStmt *CS = dyn_cast<CompoundStmt>(Node->getBody())) {
267    PrintRawCompoundStmt(CS);
268    OS << "\n";
269  } else {
270    OS << "\n";
271    PrintStmt(Node->getBody());
272  }
273}
274
275void StmtPrinter::VisitObjCForCollectionStmt(ObjCForCollectionStmt *Node) {
276  Indent() << "for (";
277  if (DeclStmt *DS = dyn_cast<DeclStmt>(Node->getElement()))
278    PrintRawDeclStmt(DS);
279  else
280    PrintExpr(cast<Expr>(Node->getElement()));
281  OS << " in ";
282  PrintExpr(Node->getCollection());
283  OS << ") ";
284
285  if (CompoundStmt *CS = dyn_cast<CompoundStmt>(Node->getBody())) {
286    PrintRawCompoundStmt(CS);
287    OS << "\n";
288  } else {
289    OS << "\n";
290    PrintStmt(Node->getBody());
291  }
292}
293
294void StmtPrinter::VisitGotoStmt(GotoStmt *Node) {
295  Indent() << "goto " << Node->getLabel()->getName() << ";\n";
296}
297
298void StmtPrinter::VisitIndirectGotoStmt(IndirectGotoStmt *Node) {
299  Indent() << "goto *";
300  PrintExpr(Node->getTarget());
301  OS << ";\n";
302}
303
304void StmtPrinter::VisitContinueStmt(ContinueStmt *Node) {
305  Indent() << "continue;\n";
306}
307
308void StmtPrinter::VisitBreakStmt(BreakStmt *Node) {
309  Indent() << "break;\n";
310}
311
312
313void StmtPrinter::VisitReturnStmt(ReturnStmt *Node) {
314  Indent() << "return";
315  if (Node->getRetValue()) {
316    OS << " ";
317    PrintExpr(Node->getRetValue());
318  }
319  OS << ";\n";
320}
321
322
323void StmtPrinter::VisitAsmStmt(AsmStmt *Node) {
324  Indent() << "asm ";
325
326  if (Node->isVolatile())
327    OS << "volatile ";
328
329  OS << "(";
330  VisitStringLiteral(Node->getAsmString());
331
332  // Outputs
333  if (Node->getNumOutputs() != 0 || Node->getNumInputs() != 0 ||
334      Node->getNumClobbers() != 0)
335    OS << " : ";
336
337  for (unsigned i = 0, e = Node->getNumOutputs(); i != e; ++i) {
338    if (i != 0)
339      OS << ", ";
340
341    if (!Node->getOutputName(i).empty()) {
342      OS << '[';
343      OS << Node->getOutputName(i);
344      OS << "] ";
345    }
346
347    VisitStringLiteral(Node->getOutputConstraintLiteral(i));
348    OS << " ";
349    Visit(Node->getOutputExpr(i));
350  }
351
352  // Inputs
353  if (Node->getNumInputs() != 0 || Node->getNumClobbers() != 0)
354    OS << " : ";
355
356  for (unsigned i = 0, e = Node->getNumInputs(); i != e; ++i) {
357    if (i != 0)
358      OS << ", ";
359
360    if (!Node->getInputName(i).empty()) {
361      OS << '[';
362      OS << Node->getInputName(i);
363      OS << "] ";
364    }
365
366    VisitStringLiteral(Node->getInputConstraintLiteral(i));
367    OS << " ";
368    Visit(Node->getInputExpr(i));
369  }
370
371  // Clobbers
372  if (Node->getNumClobbers() != 0)
373    OS << " : ";
374
375  for (unsigned i = 0, e = Node->getNumClobbers(); i != e; ++i) {
376    if (i != 0)
377      OS << ", ";
378
379    VisitStringLiteral(Node->getClobber(i));
380  }
381
382  OS << ");\n";
383}
384
385void StmtPrinter::VisitObjCAtTryStmt(ObjCAtTryStmt *Node) {
386  Indent() << "@try";
387  if (CompoundStmt *TS = dyn_cast<CompoundStmt>(Node->getTryBody())) {
388    PrintRawCompoundStmt(TS);
389    OS << "\n";
390  }
391
392  for (ObjCAtCatchStmt *catchStmt =
393         static_cast<ObjCAtCatchStmt *>(Node->getCatchStmts());
394       catchStmt;
395       catchStmt =
396         static_cast<ObjCAtCatchStmt *>(catchStmt->getNextCatchStmt())) {
397    Indent() << "@catch(";
398    if (catchStmt->getCatchParamDecl()) {
399      if (Decl *DS = catchStmt->getCatchParamDecl())
400        PrintRawDecl(DS);
401    }
402    OS << ")";
403    if (CompoundStmt *CS = dyn_cast<CompoundStmt>(catchStmt->getCatchBody()))
404      {
405        PrintRawCompoundStmt(CS);
406        OS << "\n";
407      }
408  }
409
410  if (ObjCAtFinallyStmt *FS =static_cast<ObjCAtFinallyStmt *>(
411          Node->getFinallyStmt())) {
412    Indent() << "@finally";
413    PrintRawCompoundStmt(dyn_cast<CompoundStmt>(FS->getFinallyBody()));
414    OS << "\n";
415  }
416}
417
418void StmtPrinter::VisitObjCAtFinallyStmt(ObjCAtFinallyStmt *Node) {
419}
420
421void StmtPrinter::VisitObjCAtCatchStmt (ObjCAtCatchStmt *Node) {
422  Indent() << "@catch (...) { /* todo */ } \n";
423}
424
425void StmtPrinter::VisitObjCAtThrowStmt(ObjCAtThrowStmt *Node) {
426  Indent() << "@throw";
427  if (Node->getThrowExpr()) {
428    OS << " ";
429    PrintExpr(Node->getThrowExpr());
430  }
431  OS << ";\n";
432}
433
434void StmtPrinter::VisitObjCAtSynchronizedStmt(ObjCAtSynchronizedStmt *Node) {
435  Indent() << "@synchronized (";
436  PrintExpr(Node->getSynchExpr());
437  OS << ")";
438  PrintRawCompoundStmt(Node->getSynchBody());
439  OS << "\n";
440}
441
442void StmtPrinter::PrintRawCXXCatchStmt(CXXCatchStmt *Node) {
443  OS << "catch (";
444  if (Decl *ExDecl = Node->getExceptionDecl())
445    PrintRawDecl(ExDecl);
446  else
447    OS << "...";
448  OS << ") ";
449  PrintRawCompoundStmt(cast<CompoundStmt>(Node->getHandlerBlock()));
450}
451
452void StmtPrinter::VisitCXXCatchStmt(CXXCatchStmt *Node) {
453  Indent();
454  PrintRawCXXCatchStmt(Node);
455  OS << "\n";
456}
457
458void StmtPrinter::VisitCXXTryStmt(CXXTryStmt *Node) {
459  Indent() << "try ";
460  PrintRawCompoundStmt(Node->getTryBlock());
461  for(unsigned i = 0, e = Node->getNumHandlers(); i < e; ++i) {
462    OS << " ";
463    PrintRawCXXCatchStmt(Node->getHandler(i));
464  }
465  OS << "\n";
466}
467
468//===----------------------------------------------------------------------===//
469//  Expr printing methods.
470//===----------------------------------------------------------------------===//
471
472void StmtPrinter::VisitExpr(Expr *Node) {
473  OS << "<<unknown expr type>>";
474}
475
476void StmtPrinter::VisitDeclRefExpr(DeclRefExpr *Node) {
477  OS << Node->getDecl()->getNameAsString();
478}
479
480void StmtPrinter::VisitQualifiedDeclRefExpr(QualifiedDeclRefExpr *Node) {
481  NamedDecl *D = Node->getDecl();
482
483  Node->getQualifier()->print(OS, Policy);
484  OS << D->getNameAsString();
485}
486
487void StmtPrinter::VisitUnresolvedDeclRefExpr(UnresolvedDeclRefExpr *Node) {
488  Node->getQualifier()->print(OS, Policy);
489  OS << Node->getDeclName().getAsString();
490}
491
492void StmtPrinter::VisitTemplateIdRefExpr(TemplateIdRefExpr *Node) {
493  if (Node->getQualifier())
494    Node->getQualifier()->print(OS, Policy);
495  Node->getTemplateName().print(OS, Policy, true);
496  OS << '<';
497  OS << TemplateSpecializationType::PrintTemplateArgumentList(
498                                                      Node->getTemplateArgs(),
499                                                   Node->getNumTemplateArgs(),
500                                                              Policy);
501  OS << '>';
502}
503
504void StmtPrinter::VisitObjCIvarRefExpr(ObjCIvarRefExpr *Node) {
505  if (Node->getBase()) {
506    PrintExpr(Node->getBase());
507    OS << (Node->isArrow() ? "->" : ".");
508  }
509  OS << Node->getDecl()->getNameAsString();
510}
511
512void StmtPrinter::VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *Node) {
513  if (Node->getBase()) {
514    PrintExpr(Node->getBase());
515    OS << ".";
516  }
517  OS << Node->getProperty()->getNameAsCString();
518}
519
520void StmtPrinter::VisitObjCImplicitSetterGetterRefExpr(
521                                        ObjCImplicitSetterGetterRefExpr *Node) {
522  if (Node->getBase()) {
523    PrintExpr(Node->getBase());
524    OS << ".";
525  }
526  if (Node->getGetterMethod())
527    OS << Node->getGetterMethod()->getNameAsString();
528
529}
530
531void StmtPrinter::VisitPredefinedExpr(PredefinedExpr *Node) {
532  switch (Node->getIdentType()) {
533    default:
534      assert(0 && "unknown case");
535    case PredefinedExpr::Func:
536      OS << "__func__";
537      break;
538    case PredefinedExpr::Function:
539      OS << "__FUNCTION__";
540      break;
541    case PredefinedExpr::PrettyFunction:
542      OS << "__PRETTY_FUNCTION__";
543      break;
544  }
545}
546
547void StmtPrinter::VisitCharacterLiteral(CharacterLiteral *Node) {
548  unsigned value = Node->getValue();
549  if (Node->isWide())
550    OS << "L";
551  switch (value) {
552  case '\\':
553    OS << "'\\\\'";
554    break;
555  case '\'':
556    OS << "'\\''";
557    break;
558  case '\a':
559    // TODO: K&R: the meaning of '\\a' is different in traditional C
560    OS << "'\\a'";
561    break;
562  case '\b':
563    OS << "'\\b'";
564    break;
565  // Nonstandard escape sequence.
566  /*case '\e':
567    OS << "'\\e'";
568    break;*/
569  case '\f':
570    OS << "'\\f'";
571    break;
572  case '\n':
573    OS << "'\\n'";
574    break;
575  case '\r':
576    OS << "'\\r'";
577    break;
578  case '\t':
579    OS << "'\\t'";
580    break;
581  case '\v':
582    OS << "'\\v'";
583    break;
584  default:
585    if (value < 256 && isprint(value)) {
586      OS << "'" << (char)value << "'";
587    } else if (value < 256) {
588      OS << "'\\x" << llvm::format("%x", value) << "'";
589    } else {
590      // FIXME what to really do here?
591      OS << value;
592    }
593  }
594}
595
596void StmtPrinter::VisitIntegerLiteral(IntegerLiteral *Node) {
597  bool isSigned = Node->getType()->isSignedIntegerType();
598  OS << Node->getValue().toString(10, isSigned);
599
600  // Emit suffixes.  Integer literals are always a builtin integer type.
601  switch (Node->getType()->getAsBuiltinType()->getKind()) {
602  default: assert(0 && "Unexpected type for integer literal!");
603  case BuiltinType::Int:       break; // no suffix.
604  case BuiltinType::UInt:      OS << 'U'; break;
605  case BuiltinType::Long:      OS << 'L'; break;
606  case BuiltinType::ULong:     OS << "UL"; break;
607  case BuiltinType::LongLong:  OS << "LL"; break;
608  case BuiltinType::ULongLong: OS << "ULL"; break;
609  }
610}
611void StmtPrinter::VisitFloatingLiteral(FloatingLiteral *Node) {
612  // FIXME: print value more precisely.
613  OS << Node->getValueAsApproximateDouble();
614}
615
616void StmtPrinter::VisitImaginaryLiteral(ImaginaryLiteral *Node) {
617  PrintExpr(Node->getSubExpr());
618  OS << "i";
619}
620
621void StmtPrinter::VisitStringLiteral(StringLiteral *Str) {
622  if (Str->isWide()) OS << 'L';
623  OS << '"';
624
625  // FIXME: this doesn't print wstrings right.
626  for (unsigned i = 0, e = Str->getByteLength(); i != e; ++i) {
627    unsigned char Char = Str->getStrData()[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 UnaryOperator::Real:
664    case UnaryOperator::Imag:
665    case UnaryOperator::Extension:
666      OS << ' ';
667      break;
668    case UnaryOperator::Plus:
669    case UnaryOperator::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
681bool StmtPrinter::PrintOffsetOfDesignator(Expr *E) {
682  if (isa<UnaryOperator>(E)) {
683    // Base case, print the type and comma.
684    OS << E->getType().getAsString() << ", ";
685    return true;
686  } else if (ArraySubscriptExpr *ASE = dyn_cast<ArraySubscriptExpr>(E)) {
687    PrintOffsetOfDesignator(ASE->getLHS());
688    OS << "[";
689    PrintExpr(ASE->getRHS());
690    OS << "]";
691    return false;
692  } else {
693    MemberExpr *ME = cast<MemberExpr>(E);
694    bool IsFirst = PrintOffsetOfDesignator(ME->getBase());
695    OS << (IsFirst ? "" : ".") << ME->getMemberDecl()->getNameAsString();
696    return false;
697  }
698}
699
700void StmtPrinter::VisitUnaryOffsetOf(UnaryOperator *Node) {
701  OS << "__builtin_offsetof(";
702  PrintOffsetOfDesignator(Node->getSubExpr());
703  OS << ")";
704}
705
706void StmtPrinter::VisitSizeOfAlignOfExpr(SizeOfAlignOfExpr *Node) {
707  OS << (Node->isSizeOf() ? "sizeof" : "__alignof");
708  if (Node->isArgumentType())
709    OS << "(" << Node->getArgumentType().getAsString() << ")";
710  else {
711    OS << " ";
712    PrintExpr(Node->getArgumentExpr());
713  }
714}
715void StmtPrinter::VisitArraySubscriptExpr(ArraySubscriptExpr *Node) {
716  PrintExpr(Node->getLHS());
717  OS << "[";
718  PrintExpr(Node->getRHS());
719  OS << "]";
720}
721
722void StmtPrinter::VisitCallExpr(CallExpr *Call) {
723  PrintExpr(Call->getCallee());
724  OS << "(";
725  for (unsigned i = 0, e = Call->getNumArgs(); i != e; ++i) {
726    if (isa<CXXDefaultArgExpr>(Call->getArg(i))) {
727      // Don't print any defaulted arguments
728      break;
729    }
730
731    if (i) OS << ", ";
732    PrintExpr(Call->getArg(i));
733  }
734  OS << ")";
735}
736void StmtPrinter::VisitMemberExpr(MemberExpr *Node) {
737  // FIXME: Suppress printing implicit bases (like "this")
738  PrintExpr(Node->getBase());
739  OS << (Node->isArrow() ? "->" : ".");
740  // FIXME: Suppress printing references to unnamed objects
741  // representing anonymous unions/structs
742  if (NestedNameSpecifier *Qualifier = Node->getQualifier())
743    Qualifier->print(OS, Policy);
744
745  OS << Node->getMemberDecl()->getNameAsString();
746
747  if (Node->hasExplicitTemplateArgumentList())
748    OS << TemplateSpecializationType::PrintTemplateArgumentList(
749                                                    Node->getTemplateArgs(),
750                                                    Node->getNumTemplateArgs(),
751                                                                Policy);
752}
753void StmtPrinter::VisitObjCIsaExpr(ObjCIsaExpr *Node) {
754  PrintExpr(Node->getBase());
755  OS << (Node->isArrow() ? "->isa" : ".isa");
756}
757
758void StmtPrinter::VisitExtVectorElementExpr(ExtVectorElementExpr *Node) {
759  PrintExpr(Node->getBase());
760  OS << ".";
761  OS << Node->getAccessor().getName();
762}
763void StmtPrinter::VisitCastExpr(CastExpr *) {
764  assert(0 && "CastExpr is an abstract class");
765}
766void StmtPrinter::VisitExplicitCastExpr(ExplicitCastExpr *) {
767  assert(0 && "ExplicitCastExpr is an abstract class");
768}
769void StmtPrinter::VisitCStyleCastExpr(CStyleCastExpr *Node) {
770  OS << "(" << Node->getType().getAsString() << ")";
771  PrintExpr(Node->getSubExpr());
772}
773void StmtPrinter::VisitCompoundLiteralExpr(CompoundLiteralExpr *Node) {
774  OS << "(" << Node->getType().getAsString() << ")";
775  PrintExpr(Node->getInitializer());
776}
777void StmtPrinter::VisitImplicitCastExpr(ImplicitCastExpr *Node) {
778  // No need to print anything, simply forward to the sub expression.
779  PrintExpr(Node->getSubExpr());
780}
781void StmtPrinter::VisitBinaryOperator(BinaryOperator *Node) {
782  PrintExpr(Node->getLHS());
783  OS << " " << BinaryOperator::getOpcodeStr(Node->getOpcode()) << " ";
784  PrintExpr(Node->getRHS());
785}
786void StmtPrinter::VisitCompoundAssignOperator(CompoundAssignOperator *Node) {
787  PrintExpr(Node->getLHS());
788  OS << " " << BinaryOperator::getOpcodeStr(Node->getOpcode()) << " ";
789  PrintExpr(Node->getRHS());
790}
791void StmtPrinter::VisitConditionalOperator(ConditionalOperator *Node) {
792  PrintExpr(Node->getCond());
793
794  if (Node->getLHS()) {
795    OS << " ? ";
796    PrintExpr(Node->getLHS());
797    OS << " : ";
798  }
799  else { // Handle GCC extension where LHS can be NULL.
800    OS << " ?: ";
801  }
802
803  PrintExpr(Node->getRHS());
804}
805
806// GNU extensions.
807
808void StmtPrinter::VisitAddrLabelExpr(AddrLabelExpr *Node) {
809  OS << "&&" << Node->getLabel()->getName();
810}
811
812void StmtPrinter::VisitStmtExpr(StmtExpr *E) {
813  OS << "(";
814  PrintRawCompoundStmt(E->getSubStmt());
815  OS << ")";
816}
817
818void StmtPrinter::VisitTypesCompatibleExpr(TypesCompatibleExpr *Node) {
819  OS << "__builtin_types_compatible_p(";
820  OS << Node->getArgType1().getAsString() << ",";
821  OS << Node->getArgType2().getAsString() << ")";
822}
823
824void StmtPrinter::VisitChooseExpr(ChooseExpr *Node) {
825  OS << "__builtin_choose_expr(";
826  PrintExpr(Node->getCond());
827  OS << ", ";
828  PrintExpr(Node->getLHS());
829  OS << ", ";
830  PrintExpr(Node->getRHS());
831  OS << ")";
832}
833
834void StmtPrinter::VisitGNUNullExpr(GNUNullExpr *) {
835  OS << "__null";
836}
837
838void StmtPrinter::VisitShuffleVectorExpr(ShuffleVectorExpr *Node) {
839  OS << "__builtin_shufflevector(";
840  for (unsigned i = 0, e = Node->getNumSubExprs(); i != e; ++i) {
841    if (i) OS << ", ";
842    PrintExpr(Node->getExpr(i));
843  }
844  OS << ")";
845}
846
847void StmtPrinter::VisitInitListExpr(InitListExpr* Node) {
848  if (Node->getSyntacticForm()) {
849    Visit(Node->getSyntacticForm());
850    return;
851  }
852
853  OS << "{ ";
854  for (unsigned i = 0, e = Node->getNumInits(); i != e; ++i) {
855    if (i) OS << ", ";
856    if (Node->getInit(i))
857      PrintExpr(Node->getInit(i));
858    else
859      OS << "0";
860  }
861  OS << " }";
862}
863
864void StmtPrinter::VisitParenListExpr(ParenListExpr* Node) {
865  OS << "( ";
866  for (unsigned i = 0, e = Node->getNumExprs(); i != e; ++i) {
867    if (i) OS << ", ";
868    PrintExpr(Node->getExpr(i));
869  }
870  OS << " )";
871}
872
873void StmtPrinter::VisitDesignatedInitExpr(DesignatedInitExpr *Node) {
874  for (DesignatedInitExpr::designators_iterator D = Node->designators_begin(),
875                      DEnd = Node->designators_end();
876       D != DEnd; ++D) {
877    if (D->isFieldDesignator()) {
878      if (D->getDotLoc().isInvalid())
879        OS << D->getFieldName()->getName() << ":";
880      else
881        OS << "." << D->getFieldName()->getName();
882    } else {
883      OS << "[";
884      if (D->isArrayDesignator()) {
885        PrintExpr(Node->getArrayIndex(*D));
886      } else {
887        PrintExpr(Node->getArrayRangeStart(*D));
888        OS << " ... ";
889        PrintExpr(Node->getArrayRangeEnd(*D));
890      }
891      OS << "]";
892    }
893  }
894
895  OS << " = ";
896  PrintExpr(Node->getInit());
897}
898
899void StmtPrinter::VisitImplicitValueInitExpr(ImplicitValueInitExpr *Node) {
900  if (Policy.LangOpts.CPlusPlus)
901    OS << "/*implicit*/" << Node->getType().getAsString(Policy) << "()";
902  else {
903    OS << "/*implicit*/(" << Node->getType().getAsString(Policy) << ")";
904    if (Node->getType()->isRecordType())
905      OS << "{}";
906    else
907      OS << 0;
908  }
909}
910
911void StmtPrinter::VisitVAArgExpr(VAArgExpr *Node) {
912  OS << "__builtin_va_arg(";
913  PrintExpr(Node->getSubExpr());
914  OS << ", ";
915  OS << Node->getType().getAsString();
916  OS << ")";
917}
918
919// C++
920void StmtPrinter::VisitCXXOperatorCallExpr(CXXOperatorCallExpr *Node) {
921  const char *OpStrings[NUM_OVERLOADED_OPERATORS] = {
922    "",
923#define OVERLOADED_OPERATOR(Name,Spelling,Token,Unary,Binary,MemberOnly) \
924    Spelling,
925#include "clang/Basic/OperatorKinds.def"
926  };
927
928  OverloadedOperatorKind Kind = Node->getOperator();
929  if (Kind == OO_PlusPlus || Kind == OO_MinusMinus) {
930    if (Node->getNumArgs() == 1) {
931      OS << OpStrings[Kind] << ' ';
932      PrintExpr(Node->getArg(0));
933    } else {
934      PrintExpr(Node->getArg(0));
935      OS << ' ' << OpStrings[Kind];
936    }
937  } else if (Kind == OO_Call) {
938    PrintExpr(Node->getArg(0));
939    OS << '(';
940    for (unsigned ArgIdx = 1; ArgIdx < Node->getNumArgs(); ++ArgIdx) {
941      if (ArgIdx > 1)
942        OS << ", ";
943      if (!isa<CXXDefaultArgExpr>(Node->getArg(ArgIdx)))
944        PrintExpr(Node->getArg(ArgIdx));
945    }
946    OS << ')';
947  } else if (Kind == OO_Subscript) {
948    PrintExpr(Node->getArg(0));
949    OS << '[';
950    PrintExpr(Node->getArg(1));
951    OS << ']';
952  } else if (Node->getNumArgs() == 1) {
953    OS << OpStrings[Kind] << ' ';
954    PrintExpr(Node->getArg(0));
955  } else if (Node->getNumArgs() == 2) {
956    PrintExpr(Node->getArg(0));
957    OS << ' ' << OpStrings[Kind] << ' ';
958    PrintExpr(Node->getArg(1));
959  } else {
960    assert(false && "unknown overloaded operator");
961  }
962}
963
964void StmtPrinter::VisitCXXMemberCallExpr(CXXMemberCallExpr *Node) {
965  VisitCallExpr(cast<CallExpr>(Node));
966}
967
968void StmtPrinter::VisitCXXNamedCastExpr(CXXNamedCastExpr *Node) {
969  OS << Node->getCastName() << '<';
970  OS << Node->getTypeAsWritten().getAsString() << ">(";
971  PrintExpr(Node->getSubExpr());
972  OS << ")";
973}
974
975void StmtPrinter::VisitCXXStaticCastExpr(CXXStaticCastExpr *Node) {
976  VisitCXXNamedCastExpr(Node);
977}
978
979void StmtPrinter::VisitCXXDynamicCastExpr(CXXDynamicCastExpr *Node) {
980  VisitCXXNamedCastExpr(Node);
981}
982
983void StmtPrinter::VisitCXXReinterpretCastExpr(CXXReinterpretCastExpr *Node) {
984  VisitCXXNamedCastExpr(Node);
985}
986
987void StmtPrinter::VisitCXXConstCastExpr(CXXConstCastExpr *Node) {
988  VisitCXXNamedCastExpr(Node);
989}
990
991void StmtPrinter::VisitCXXTypeidExpr(CXXTypeidExpr *Node) {
992  OS << "typeid(";
993  if (Node->isTypeOperand()) {
994    OS << Node->getTypeOperand().getAsString();
995  } else {
996    PrintExpr(Node->getExprOperand());
997  }
998  OS << ")";
999}
1000
1001void StmtPrinter::VisitCXXBoolLiteralExpr(CXXBoolLiteralExpr *Node) {
1002  OS << (Node->getValue() ? "true" : "false");
1003}
1004
1005void StmtPrinter::VisitCXXNullPtrLiteralExpr(CXXNullPtrLiteralExpr *Node) {
1006  OS << "nullptr";
1007}
1008
1009void StmtPrinter::VisitCXXThisExpr(CXXThisExpr *Node) {
1010  OS << "this";
1011}
1012
1013void StmtPrinter::VisitCXXThrowExpr(CXXThrowExpr *Node) {
1014  if (Node->getSubExpr() == 0)
1015    OS << "throw";
1016  else {
1017    OS << "throw ";
1018    PrintExpr(Node->getSubExpr());
1019  }
1020}
1021
1022void StmtPrinter::VisitCXXDefaultArgExpr(CXXDefaultArgExpr *Node) {
1023  // Nothing to print: we picked up the default argument
1024}
1025
1026void StmtPrinter::VisitCXXFunctionalCastExpr(CXXFunctionalCastExpr *Node) {
1027  OS << Node->getType().getAsString();
1028  OS << "(";
1029  PrintExpr(Node->getSubExpr());
1030  OS << ")";
1031}
1032
1033void StmtPrinter::VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *Node) {
1034  PrintExpr(Node->getSubExpr());
1035}
1036
1037void StmtPrinter::VisitCXXTemporaryObjectExpr(CXXTemporaryObjectExpr *Node) {
1038  OS << Node->getType().getAsString();
1039  OS << "(";
1040  for (CXXTemporaryObjectExpr::arg_iterator Arg = Node->arg_begin(),
1041                                         ArgEnd = Node->arg_end();
1042       Arg != ArgEnd; ++Arg) {
1043    if (Arg != Node->arg_begin())
1044      OS << ", ";
1045    PrintExpr(*Arg);
1046  }
1047  OS << ")";
1048}
1049
1050void StmtPrinter::VisitCXXZeroInitValueExpr(CXXZeroInitValueExpr *Node) {
1051  OS << Node->getType().getAsString() << "()";
1052}
1053
1054void
1055StmtPrinter::VisitCXXConditionDeclExpr(CXXConditionDeclExpr *E) {
1056  PrintRawDecl(E->getVarDecl());
1057}
1058
1059void StmtPrinter::VisitCXXNewExpr(CXXNewExpr *E) {
1060  if (E->isGlobalNew())
1061    OS << "::";
1062  OS << "new ";
1063  unsigned NumPlace = E->getNumPlacementArgs();
1064  if (NumPlace > 0) {
1065    OS << "(";
1066    PrintExpr(E->getPlacementArg(0));
1067    for (unsigned i = 1; i < NumPlace; ++i) {
1068      OS << ", ";
1069      PrintExpr(E->getPlacementArg(i));
1070    }
1071    OS << ") ";
1072  }
1073  if (E->isParenTypeId())
1074    OS << "(";
1075  std::string TypeS;
1076  if (Expr *Size = E->getArraySize()) {
1077    llvm::raw_string_ostream s(TypeS);
1078    Size->printPretty(s, Context, Helper, Policy);
1079    s.flush();
1080    TypeS = "[" + TypeS + "]";
1081  }
1082  E->getAllocatedType().getAsStringInternal(TypeS, Policy);
1083  OS << TypeS;
1084  if (E->isParenTypeId())
1085    OS << ")";
1086
1087  if (E->hasInitializer()) {
1088    OS << "(";
1089    unsigned NumCons = E->getNumConstructorArgs();
1090    if (NumCons > 0) {
1091      PrintExpr(E->getConstructorArg(0));
1092      for (unsigned i = 1; i < NumCons; ++i) {
1093        OS << ", ";
1094        PrintExpr(E->getConstructorArg(i));
1095      }
1096    }
1097    OS << ")";
1098  }
1099}
1100
1101void StmtPrinter::VisitCXXDeleteExpr(CXXDeleteExpr *E) {
1102  if (E->isGlobalDelete())
1103    OS << "::";
1104  OS << "delete ";
1105  if (E->isArrayForm())
1106    OS << "[] ";
1107  PrintExpr(E->getArgument());
1108}
1109
1110void StmtPrinter::VisitCXXPseudoDestructorExpr(CXXPseudoDestructorExpr *E) {
1111  PrintExpr(E->getBase());
1112  if (E->isArrow())
1113    OS << "->";
1114  else
1115    OS << '.';
1116  if (E->getQualifier())
1117    E->getQualifier()->print(OS, Policy);
1118
1119  std::string TypeS;
1120  E->getDestroyedType().getAsStringInternal(TypeS, Policy);
1121  OS << TypeS;
1122}
1123
1124void StmtPrinter::VisitUnresolvedFunctionNameExpr(UnresolvedFunctionNameExpr *E) {
1125  OS << E->getName().getAsString();
1126}
1127
1128void StmtPrinter::VisitCXXConstructExpr(CXXConstructExpr *E) {
1129  // Nothing to print.
1130}
1131
1132void StmtPrinter::VisitCXXExprWithTemporaries(CXXExprWithTemporaries *E) {
1133  // Just forward to the sub expression.
1134  PrintExpr(E->getSubExpr());
1135}
1136
1137void
1138StmtPrinter::VisitCXXUnresolvedConstructExpr(
1139                                           CXXUnresolvedConstructExpr *Node) {
1140  OS << Node->getTypeAsWritten().getAsString();
1141  OS << "(";
1142  for (CXXUnresolvedConstructExpr::arg_iterator Arg = Node->arg_begin(),
1143                                             ArgEnd = Node->arg_end();
1144       Arg != ArgEnd; ++Arg) {
1145    if (Arg != Node->arg_begin())
1146      OS << ", ";
1147    PrintExpr(*Arg);
1148  }
1149  OS << ")";
1150}
1151
1152void StmtPrinter::VisitCXXUnresolvedMemberExpr(CXXUnresolvedMemberExpr *Node) {
1153  PrintExpr(Node->getBase());
1154  OS << (Node->isArrow() ? "->" : ".");
1155  if (NestedNameSpecifier *Qualifier = Node->getQualifier())
1156    Qualifier->print(OS, Policy);
1157  OS << Node->getMember().getAsString();
1158}
1159
1160static const char *getTypeTraitName(UnaryTypeTrait UTT) {
1161  switch (UTT) {
1162  default: assert(false && "Unknown type trait");
1163  case UTT_HasNothrowAssign:      return "__has_nothrow_assign";
1164  case UTT_HasNothrowCopy:        return "__has_nothrow_copy";
1165  case UTT_HasNothrowConstructor: return "__has_nothrow_constructor";
1166  case UTT_HasTrivialAssign:      return "__has_trivial_assign";
1167  case UTT_HasTrivialCopy:        return "__has_trivial_copy";
1168  case UTT_HasTrivialConstructor: return "__has_trivial_constructor";
1169  case UTT_HasTrivialDestructor:  return "__has_trivial_destructor";
1170  case UTT_HasVirtualDestructor:  return "__has_virtual_destructor";
1171  case UTT_IsAbstract:            return "__is_abstract";
1172  case UTT_IsClass:               return "__is_class";
1173  case UTT_IsEmpty:               return "__is_empty";
1174  case UTT_IsEnum:                return "__is_enum";
1175  case UTT_IsPOD:                 return "__is_pod";
1176  case UTT_IsPolymorphic:         return "__is_polymorphic";
1177  case UTT_IsUnion:               return "__is_union";
1178  }
1179}
1180
1181void StmtPrinter::VisitUnaryTypeTraitExpr(UnaryTypeTraitExpr *E) {
1182  OS << getTypeTraitName(E->getTrait()) << "("
1183     << E->getQueriedType().getAsString() << ")";
1184}
1185
1186// Obj-C
1187
1188void StmtPrinter::VisitObjCStringLiteral(ObjCStringLiteral *Node) {
1189  OS << "@";
1190  VisitStringLiteral(Node->getString());
1191}
1192
1193void StmtPrinter::VisitObjCEncodeExpr(ObjCEncodeExpr *Node) {
1194  OS << "@encode(" << Node->getEncodedType().getAsString() << ')';
1195}
1196
1197void StmtPrinter::VisitObjCSelectorExpr(ObjCSelectorExpr *Node) {
1198  OS << "@selector(" << Node->getSelector().getAsString() << ')';
1199}
1200
1201void StmtPrinter::VisitObjCProtocolExpr(ObjCProtocolExpr *Node) {
1202  OS << "@protocol(" << Node->getProtocol()->getNameAsString() << ')';
1203}
1204
1205void StmtPrinter::VisitObjCMessageExpr(ObjCMessageExpr *Mess) {
1206  OS << "[";
1207  Expr *receiver = Mess->getReceiver();
1208  if (receiver) PrintExpr(receiver);
1209  else OS << Mess->getClassName()->getName();
1210  OS << ' ';
1211  Selector selector = Mess->getSelector();
1212  if (selector.isUnarySelector()) {
1213    OS << selector.getIdentifierInfoForSlot(0)->getName();
1214  } else {
1215    for (unsigned i = 0, e = Mess->getNumArgs(); i != e; ++i) {
1216      if (i < selector.getNumArgs()) {
1217        if (i > 0) OS << ' ';
1218        if (selector.getIdentifierInfoForSlot(i))
1219          OS << selector.getIdentifierInfoForSlot(i)->getName() << ':';
1220        else
1221           OS << ":";
1222      }
1223      else OS << ", "; // Handle variadic methods.
1224
1225      PrintExpr(Mess->getArg(i));
1226    }
1227  }
1228  OS << "]";
1229}
1230
1231void StmtPrinter::VisitObjCSuperExpr(ObjCSuperExpr *) {
1232  OS << "super";
1233}
1234
1235void StmtPrinter::VisitBlockExpr(BlockExpr *Node) {
1236  BlockDecl *BD = Node->getBlockDecl();
1237  OS << "^";
1238
1239  const FunctionType *AFT = Node->getFunctionType();
1240
1241  if (isa<FunctionNoProtoType>(AFT)) {
1242    OS << "()";
1243  } else if (!BD->param_empty() || cast<FunctionProtoType>(AFT)->isVariadic()) {
1244    OS << '(';
1245    std::string ParamStr;
1246    for (BlockDecl::param_iterator AI = BD->param_begin(),
1247         E = BD->param_end(); AI != E; ++AI) {
1248      if (AI != BD->param_begin()) OS << ", ";
1249      ParamStr = (*AI)->getNameAsString();
1250      (*AI)->getType().getAsStringInternal(ParamStr, Policy);
1251      OS << ParamStr;
1252    }
1253
1254    const FunctionProtoType *FT = cast<FunctionProtoType>(AFT);
1255    if (FT->isVariadic()) {
1256      if (!BD->param_empty()) OS << ", ";
1257      OS << "...";
1258    }
1259    OS << ')';
1260  }
1261}
1262
1263void StmtPrinter::VisitBlockDeclRefExpr(BlockDeclRefExpr *Node) {
1264  OS << Node->getDecl()->getNameAsString();
1265}
1266//===----------------------------------------------------------------------===//
1267// Stmt method implementations
1268//===----------------------------------------------------------------------===//
1269
1270void Stmt::dumpPretty(ASTContext& Context) const {
1271  printPretty(llvm::errs(), Context, 0,
1272              PrintingPolicy(Context.getLangOptions()));
1273}
1274
1275void Stmt::printPretty(llvm::raw_ostream &OS, ASTContext& Context,
1276                       PrinterHelper* Helper,
1277                       const PrintingPolicy &Policy,
1278                       unsigned Indentation) const {
1279  if (this == 0) {
1280    OS << "<NULL>";
1281    return;
1282  }
1283
1284  if (Policy.Dump) {
1285    dump(Context.getSourceManager());
1286    return;
1287  }
1288
1289  StmtPrinter P(OS, Context, Helper, Policy, Indentation);
1290  P.Visit(const_cast<Stmt*>(this));
1291}
1292
1293//===----------------------------------------------------------------------===//
1294// PrinterHelper
1295//===----------------------------------------------------------------------===//
1296
1297// Implement virtual destructor.
1298PrinterHelper::~PrinterHelper() {}
1299