StmtPrinter.cpp revision 6fec64874f282f7084d5c626e42241cdcbafac9d 
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/DeclObjC.h"
17#include "clang/AST/PrettyPrinter.h"
18#include "llvm/Support/Compiler.h"
19#include "llvm/Support/Streams.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    unsigned IndentLevel;
31    clang::PrinterHelper* Helper;
32  public:
33    StmtPrinter(llvm::raw_ostream &os, PrinterHelper* helper) :
34      OS(os), IndentLevel(0), Helper(helper) {}
35
36    void PrintStmt(Stmt *S, int SubIndent = 1) {
37      IndentLevel += SubIndent;
38      if (S && isa<Expr>(S)) {
39        // If this is an expr used in a stmt context, indent and newline it.
40        Indent();
41        Visit(S);
42        OS << ";\n";
43      } else if (S) {
44        Visit(S);
45      } else {
46        Indent() << "<<<NULL STATEMENT>>>\n";
47      }
48      IndentLevel -= SubIndent;
49    }
50
51    void PrintRawCompoundStmt(CompoundStmt *S);
52    void PrintRawDecl(Decl *D);
53    void PrintRawDeclStmt(DeclStmt *S);
54    void PrintRawIfStmt(IfStmt *If);
55
56    void PrintExpr(Expr *E) {
57      if (E)
58        Visit(E);
59      else
60        OS << "<null expr>";
61    }
62
63    llvm::raw_ostream &Indent(int Delta = 0) const {
64      for (int i = 0, e = IndentLevel+Delta; i < e; ++i)
65        OS << "  ";
66      return OS;
67    }
68
69    bool PrintOffsetOfDesignator(Expr *E);
70    void VisitUnaryOffsetOf(UnaryOperator *Node);
71
72    void Visit(Stmt* S) {
73      if (Helper && Helper->handledStmt(S,OS))
74          return;
75      else StmtVisitor<StmtPrinter>::Visit(S);
76    }
77
78    void VisitStmt(Stmt *Node);
79#define STMT(CLASS, PARENT) \
80    void Visit##CLASS(CLASS *Node);
81#include "clang/AST/StmtNodes.def"
82  };
83}
84
85//===----------------------------------------------------------------------===//
86//  Stmt printing methods.
87//===----------------------------------------------------------------------===//
88
89void StmtPrinter::VisitStmt(Stmt *Node) {
90  Indent() << "<<unknown stmt type>>\n";
91}
92
93/// PrintRawCompoundStmt - Print a compound stmt without indenting the {, and
94/// with no newline after the }.
95void StmtPrinter::PrintRawCompoundStmt(CompoundStmt *Node) {
96  OS << "{\n";
97  for (CompoundStmt::body_iterator I = Node->body_begin(), E = Node->body_end();
98       I != E; ++I)
99    PrintStmt(*I);
100
101  Indent() << "}";
102}
103
104void StmtPrinter::PrintRawDecl(Decl *D) {
105  // FIXME: Need to complete/beautify this... this code simply shows the
106  // nodes are where they need to be.
107  if (TypedefDecl *localType = dyn_cast<TypedefDecl>(D)) {
108    OS << "typedef " << localType->getUnderlyingType().getAsString();
109    OS << " " << localType->getNameAsString();
110  } else if (ValueDecl *VD = dyn_cast<ValueDecl>(D)) {
111    // Emit storage class for vardecls.
112    if (VarDecl *V = dyn_cast<VarDecl>(VD)) {
113      switch (V->getStorageClass()) {
114        default: assert(0 && "Unknown storage class!");
115        case VarDecl::None:     break;
116        case VarDecl::Extern:   OS << "extern "; break;
117        case VarDecl::Static:   OS << "static "; break;
118        case VarDecl::Auto:     OS << "auto "; break;
119        case VarDecl::Register: OS << "register "; break;
120      }
121    }
122
123    std::string Name = VD->getNameAsString();
124    VD->getType().getAsStringInternal(Name);
125    OS << Name;
126
127    // If this is a vardecl with an initializer, emit it.
128    if (VarDecl *V = dyn_cast<VarDecl>(VD)) {
129      if (V->getInit()) {
130        OS << " = ";
131        PrintExpr(V->getInit());
132      }
133    }
134  } else if (TagDecl *TD = dyn_cast<TagDecl>(D)) {
135    // print a free standing tag decl (e.g. "struct x;").
136    OS << TD->getKindName();
137    OS << " ";
138    if (const IdentifierInfo *II = TD->getIdentifier())
139      OS << II->getName();
140    else
141      OS << "<anonymous>";
142    // FIXME: print tag bodies.
143  } else {
144    assert(0 && "Unexpected decl");
145  }
146}
147
148void StmtPrinter::PrintRawDeclStmt(DeclStmt *S) {
149  bool isFirst = false;
150
151  for (DeclStmt::decl_iterator I = S->decl_begin(), E = S->decl_end();
152       I != E; ++I) {
153
154    if (!isFirst) OS << ", ";
155    else isFirst = false;
156
157    PrintRawDecl(*I);
158  }
159}
160
161void StmtPrinter::VisitNullStmt(NullStmt *Node) {
162  Indent() << ";\n";
163}
164
165void StmtPrinter::VisitDeclStmt(DeclStmt *Node) {
166  for (DeclStmt::decl_iterator I = Node->decl_begin(), E = Node->decl_end();
167       I!=E; ++I) {
168    Indent();
169    PrintRawDecl(*I);
170    OS << ";\n";
171  }
172}
173
174void StmtPrinter::VisitCompoundStmt(CompoundStmt *Node) {
175  Indent();
176  PrintRawCompoundStmt(Node);
177  OS << "\n";
178}
179
180void StmtPrinter::VisitCaseStmt(CaseStmt *Node) {
181  Indent(-1) << "case ";
182  PrintExpr(Node->getLHS());
183  if (Node->getRHS()) {
184    OS << " ... ";
185    PrintExpr(Node->getRHS());
186  }
187  OS << ":\n";
188
189  PrintStmt(Node->getSubStmt(), 0);
190}
191
192void StmtPrinter::VisitDefaultStmt(DefaultStmt *Node) {
193  Indent(-1) << "default:\n";
194  PrintStmt(Node->getSubStmt(), 0);
195}
196
197void StmtPrinter::VisitLabelStmt(LabelStmt *Node) {
198  Indent(-1) << Node->getName() << ":\n";
199  PrintStmt(Node->getSubStmt(), 0);
200}
201
202void StmtPrinter::PrintRawIfStmt(IfStmt *If) {
203  OS << "if ";
204  PrintExpr(If->getCond());
205
206  if (CompoundStmt *CS = dyn_cast<CompoundStmt>(If->getThen())) {
207    OS << ' ';
208    PrintRawCompoundStmt(CS);
209    OS << (If->getElse() ? ' ' : '\n');
210  } else {
211    OS << '\n';
212    PrintStmt(If->getThen());
213    if (If->getElse()) Indent();
214  }
215
216  if (Stmt *Else = If->getElse()) {
217    OS << "else";
218
219    if (CompoundStmt *CS = dyn_cast<CompoundStmt>(Else)) {
220      OS << ' ';
221      PrintRawCompoundStmt(CS);
222      OS << '\n';
223    } else if (IfStmt *ElseIf = dyn_cast<IfStmt>(Else)) {
224      OS << ' ';
225      PrintRawIfStmt(ElseIf);
226    } else {
227      OS << '\n';
228      PrintStmt(If->getElse());
229    }
230  }
231}
232
233void StmtPrinter::VisitIfStmt(IfStmt *If) {
234  Indent();
235  PrintRawIfStmt(If);
236}
237
238void StmtPrinter::VisitSwitchStmt(SwitchStmt *Node) {
239  Indent() << "switch (";
240  PrintExpr(Node->getCond());
241  OS << ")";
242
243  // Pretty print compoundstmt bodies (very common).
244  if (CompoundStmt *CS = dyn_cast<CompoundStmt>(Node->getBody())) {
245    OS << " ";
246    PrintRawCompoundStmt(CS);
247    OS << "\n";
248  } else {
249    OS << "\n";
250    PrintStmt(Node->getBody());
251  }
252}
253
254void StmtPrinter::VisitSwitchCase(SwitchCase*) {
255  assert(0 && "SwitchCase is an abstract class");
256}
257
258void StmtPrinter::VisitWhileStmt(WhileStmt *Node) {
259  Indent() << "while (";
260  PrintExpr(Node->getCond());
261  OS << ")\n";
262  PrintStmt(Node->getBody());
263}
264
265void StmtPrinter::VisitDoStmt(DoStmt *Node) {
266  Indent() << "do ";
267  if (CompoundStmt *CS = dyn_cast<CompoundStmt>(Node->getBody())) {
268    PrintRawCompoundStmt(CS);
269    OS << " ";
270  } else {
271    OS << "\n";
272    PrintStmt(Node->getBody());
273    Indent();
274  }
275
276  OS << "while ";
277  PrintExpr(Node->getCond());
278  OS << ";\n";
279}
280
281void StmtPrinter::VisitForStmt(ForStmt *Node) {
282  Indent() << "for (";
283  if (Node->getInit()) {
284    if (DeclStmt *DS = dyn_cast<DeclStmt>(Node->getInit()))
285      PrintRawDeclStmt(DS);
286    else
287      PrintExpr(cast<Expr>(Node->getInit()));
288  }
289  OS << ";";
290  if (Node->getCond()) {
291    OS << " ";
292    PrintExpr(Node->getCond());
293  }
294  OS << ";";
295  if (Node->getInc()) {
296    OS << " ";
297    PrintExpr(Node->getInc());
298  }
299  OS << ") ";
300
301  if (CompoundStmt *CS = dyn_cast<CompoundStmt>(Node->getBody())) {
302    PrintRawCompoundStmt(CS);
303    OS << "\n";
304  } else {
305    OS << "\n";
306    PrintStmt(Node->getBody());
307  }
308}
309
310void StmtPrinter::VisitObjCForCollectionStmt(ObjCForCollectionStmt *Node) {
311  Indent() << "for (";
312  if (DeclStmt *DS = dyn_cast<DeclStmt>(Node->getElement()))
313    PrintRawDeclStmt(DS);
314  else
315    PrintExpr(cast<Expr>(Node->getElement()));
316  OS << " in ";
317  PrintExpr(Node->getCollection());
318  OS << ") ";
319
320  if (CompoundStmt *CS = dyn_cast<CompoundStmt>(Node->getBody())) {
321    PrintRawCompoundStmt(CS);
322    OS << "\n";
323  } else {
324    OS << "\n";
325    PrintStmt(Node->getBody());
326  }
327}
328
329void StmtPrinter::VisitGotoStmt(GotoStmt *Node) {
330  Indent() << "goto " << Node->getLabel()->getName() << ";\n";
331}
332
333void StmtPrinter::VisitIndirectGotoStmt(IndirectGotoStmt *Node) {
334  Indent() << "goto *";
335  PrintExpr(Node->getTarget());
336  OS << ";\n";
337}
338
339void StmtPrinter::VisitContinueStmt(ContinueStmt *Node) {
340  Indent() << "continue;\n";
341}
342
343void StmtPrinter::VisitBreakStmt(BreakStmt *Node) {
344  Indent() << "break;\n";
345}
346
347
348void StmtPrinter::VisitReturnStmt(ReturnStmt *Node) {
349  Indent() << "return";
350  if (Node->getRetValue()) {
351    OS << " ";
352    PrintExpr(Node->getRetValue());
353  }
354  OS << ";\n";
355}
356
357
358void StmtPrinter::VisitAsmStmt(AsmStmt *Node) {
359  Indent() << "asm ";
360
361  if (Node->isVolatile())
362    OS << "volatile ";
363
364  OS << "(";
365  VisitStringLiteral(Node->getAsmString());
366
367  // Outputs
368  if (Node->getNumOutputs() != 0 || Node->getNumInputs() != 0 ||
369      Node->getNumClobbers() != 0)
370    OS << " : ";
371
372  for (unsigned i = 0, e = Node->getNumOutputs(); i != e; ++i) {
373    if (i != 0)
374      OS << ", ";
375
376    if (!Node->getOutputName(i).empty()) {
377      OS << '[';
378      OS << Node->getOutputName(i);
379      OS << "] ";
380    }
381
382    VisitStringLiteral(Node->getOutputConstraint(i));
383    OS << " ";
384    Visit(Node->getOutputExpr(i));
385  }
386
387  // Inputs
388  if (Node->getNumInputs() != 0 || Node->getNumClobbers() != 0)
389    OS << " : ";
390
391  for (unsigned i = 0, e = Node->getNumInputs(); i != e; ++i) {
392    if (i != 0)
393      OS << ", ";
394
395    if (!Node->getInputName(i).empty()) {
396      OS << '[';
397      OS << Node->getInputName(i);
398      OS << "] ";
399    }
400
401    VisitStringLiteral(Node->getInputConstraint(i));
402    OS << " ";
403    Visit(Node->getInputExpr(i));
404  }
405
406  // Clobbers
407  if (Node->getNumClobbers() != 0)
408    OS << " : ";
409
410  for (unsigned i = 0, e = Node->getNumClobbers(); i != e; ++i) {
411    if (i != 0)
412      OS << ", ";
413
414    VisitStringLiteral(Node->getClobber(i));
415  }
416
417  OS << ");\n";
418}
419
420void StmtPrinter::VisitObjCAtTryStmt(ObjCAtTryStmt *Node) {
421  Indent() << "@try";
422  if (CompoundStmt *TS = dyn_cast<CompoundStmt>(Node->getTryBody())) {
423    PrintRawCompoundStmt(TS);
424    OS << "\n";
425  }
426
427  for (ObjCAtCatchStmt *catchStmt =
428         static_cast<ObjCAtCatchStmt *>(Node->getCatchStmts());
429       catchStmt;
430       catchStmt =
431         static_cast<ObjCAtCatchStmt *>(catchStmt->getNextCatchStmt())) {
432    Indent() << "@catch(";
433    if (catchStmt->getCatchParamStmt()) {
434      if (DeclStmt *DS = dyn_cast<DeclStmt>(catchStmt->getCatchParamStmt()))
435        PrintRawDeclStmt(DS);
436    }
437    OS << ")";
438    if (CompoundStmt *CS = dyn_cast<CompoundStmt>(catchStmt->getCatchBody()))
439      {
440        PrintRawCompoundStmt(CS);
441        OS << "\n";
442      }
443  }
444
445  if (ObjCAtFinallyStmt *FS =static_cast<ObjCAtFinallyStmt *>(
446          Node->getFinallyStmt())) {
447    Indent() << "@finally";
448    PrintRawCompoundStmt(dyn_cast<CompoundStmt>(FS->getFinallyBody()));
449    OS << "\n";
450  }
451}
452
453void StmtPrinter::VisitObjCAtFinallyStmt(ObjCAtFinallyStmt *Node) {
454}
455
456void StmtPrinter::VisitObjCAtCatchStmt (ObjCAtCatchStmt *Node) {
457  Indent() << "@catch (...) { /* todo */ } \n";
458}
459
460void StmtPrinter::VisitObjCAtThrowStmt(ObjCAtThrowStmt *Node) {
461  Indent() << "@throw";
462  if (Node->getThrowExpr()) {
463    OS << " ";
464    PrintExpr(Node->getThrowExpr());
465  }
466  OS << ";\n";
467}
468
469void StmtPrinter::VisitObjCAtSynchronizedStmt(ObjCAtSynchronizedStmt *Node) {
470  Indent() << "@synchronized (";
471  PrintExpr(Node->getSynchExpr());
472  OS << ")";
473  PrintRawCompoundStmt(Node->getSynchBody());
474  OS << "\n";
475}
476
477//===----------------------------------------------------------------------===//
478//  Expr printing methods.
479//===----------------------------------------------------------------------===//
480
481void StmtPrinter::VisitExpr(Expr *Node) {
482  OS << "<<unknown expr type>>";
483}
484
485void StmtPrinter::VisitDeclRefExpr(DeclRefExpr *Node) {
486  OS << Node->getDecl()->getNameAsString();
487}
488
489void StmtPrinter::VisitObjCIvarRefExpr(ObjCIvarRefExpr *Node) {
490  if (Node->getBase()) {
491    PrintExpr(Node->getBase());
492    OS << (Node->isArrow() ? "->" : ".");
493  }
494  OS << Node->getDecl()->getNameAsString();
495}
496
497void StmtPrinter::VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *Node) {
498  if (Node->getBase()) {
499    PrintExpr(Node->getBase());
500    OS << ".";
501  }
502  // FIXME: OS << Node->getDecl()->getName();
503}
504
505void StmtPrinter::VisitObjCKVCRefExpr(ObjCKVCRefExpr *Node) {
506  if (Node->getBase()) {
507    PrintExpr(Node->getBase());
508    OS << ".";
509  }
510  // FIXME: Setter/Getter names
511}
512
513void StmtPrinter::VisitPredefinedExpr(PredefinedExpr *Node) {
514  switch (Node->getIdentType()) {
515    default:
516      assert(0 && "unknown case");
517    case PredefinedExpr::Func:
518      OS << "__func__";
519      break;
520    case PredefinedExpr::Function:
521      OS << "__FUNCTION__";
522      break;
523    case PredefinedExpr::PrettyFunction:
524      OS << "__PRETTY_FUNCTION__";
525      break;
526  }
527}
528
529void StmtPrinter::VisitCharacterLiteral(CharacterLiteral *Node) {
530  unsigned value = Node->getValue();
531  if (Node->isWide())
532    OS << "L";
533  switch (value) {
534  case '\\':
535    OS << "'\\\\'";
536    break;
537  case '\'':
538    OS << "'\\''";
539    break;
540  case '\a':
541    // TODO: K&R: the meaning of '\\a' is different in traditional C
542    OS << "'\\a'";
543    break;
544  case '\b':
545    OS << "'\\b'";
546    break;
547  // Nonstandard escape sequence.
548  /*case '\e':
549    OS << "'\\e'";
550    break;*/
551  case '\f':
552    OS << "'\\f'";
553    break;
554  case '\n':
555    OS << "'\\n'";
556    break;
557  case '\r':
558    OS << "'\\r'";
559    break;
560  case '\t':
561    OS << "'\\t'";
562    break;
563  case '\v':
564    OS << "'\\v'";
565    break;
566  default:
567    if (value < 256 && isprint(value)) {
568      OS << "'" << (char)value << "'";
569    } else if (value < 256) {
570      OS << "'\\x" << llvm::format("%x", value) << "'";
571    } else {
572      // FIXME what to really do here?
573      OS << value;
574    }
575  }
576}
577
578void StmtPrinter::VisitIntegerLiteral(IntegerLiteral *Node) {
579  bool isSigned = Node->getType()->isSignedIntegerType();
580  OS << Node->getValue().toString(10, isSigned);
581
582  // Emit suffixes.  Integer literals are always a builtin integer type.
583  switch (Node->getType()->getAsBuiltinType()->getKind()) {
584  default: assert(0 && "Unexpected type for integer literal!");
585  case BuiltinType::Int:       break; // no suffix.
586  case BuiltinType::UInt:      OS << 'U'; break;
587  case BuiltinType::Long:      OS << 'L'; break;
588  case BuiltinType::ULong:     OS << "UL"; break;
589  case BuiltinType::LongLong:  OS << "LL"; break;
590  case BuiltinType::ULongLong: OS << "ULL"; break;
591  }
592}
593void StmtPrinter::VisitFloatingLiteral(FloatingLiteral *Node) {
594  // FIXME: print value more precisely.
595  OS << Node->getValueAsApproximateDouble();
596}
597
598void StmtPrinter::VisitImaginaryLiteral(ImaginaryLiteral *Node) {
599  PrintExpr(Node->getSubExpr());
600  OS << "i";
601}
602
603void StmtPrinter::VisitStringLiteral(StringLiteral *Str) {
604  if (Str->isWide()) OS << 'L';
605  OS << '"';
606
607  // FIXME: this doesn't print wstrings right.
608  for (unsigned i = 0, e = Str->getByteLength(); i != e; ++i) {
609    switch (Str->getStrData()[i]) {
610    default: OS << Str->getStrData()[i]; break;
611    // Handle some common ones to make dumps prettier.
612    case '\\': OS << "\\\\"; break;
613    case '"': OS << "\\\""; break;
614    case '\n': OS << "\\n"; break;
615    case '\t': OS << "\\t"; break;
616    case '\a': OS << "\\a"; break;
617    case '\b': OS << "\\b"; break;
618    }
619  }
620  OS << '"';
621}
622void StmtPrinter::VisitParenExpr(ParenExpr *Node) {
623  OS << "(";
624  PrintExpr(Node->getSubExpr());
625  OS << ")";
626}
627void StmtPrinter::VisitUnaryOperator(UnaryOperator *Node) {
628  if (!Node->isPostfix()) {
629    OS << UnaryOperator::getOpcodeStr(Node->getOpcode());
630
631    // Print a space if this is an "identifier operator" like __real.
632    switch (Node->getOpcode()) {
633    default: break;
634    case UnaryOperator::Real:
635    case UnaryOperator::Imag:
636    case UnaryOperator::Extension:
637      OS << ' ';
638      break;
639    }
640  }
641  PrintExpr(Node->getSubExpr());
642
643  if (Node->isPostfix())
644    OS << UnaryOperator::getOpcodeStr(Node->getOpcode());
645}
646
647bool StmtPrinter::PrintOffsetOfDesignator(Expr *E) {
648  if (isa<CompoundLiteralExpr>(E)) {
649    // Base case, print the type and comma.
650    OS << E->getType().getAsString() << ", ";
651    return true;
652  } else if (ArraySubscriptExpr *ASE = dyn_cast<ArraySubscriptExpr>(E)) {
653    PrintOffsetOfDesignator(ASE->getLHS());
654    OS << "[";
655    PrintExpr(ASE->getRHS());
656    OS << "]";
657    return false;
658  } else {
659    MemberExpr *ME = cast<MemberExpr>(E);
660    bool IsFirst = PrintOffsetOfDesignator(ME->getBase());
661    OS << (IsFirst ? "" : ".") << ME->getMemberDecl()->getNameAsString();
662    return false;
663  }
664}
665
666void StmtPrinter::VisitUnaryOffsetOf(UnaryOperator *Node) {
667  OS << "__builtin_offsetof(";
668  PrintOffsetOfDesignator(Node->getSubExpr());
669  OS << ")";
670}
671
672void StmtPrinter::VisitSizeOfAlignOfExpr(SizeOfAlignOfExpr *Node) {
673  OS << (Node->isSizeOf() ? "sizeof" : "__alignof");
674  if (Node->isArgumentType())
675    OS << "(" << Node->getArgumentType().getAsString() << ")";
676  else {
677    OS << " ";
678    PrintExpr(Node->getArgumentExpr());
679  }
680}
681void StmtPrinter::VisitArraySubscriptExpr(ArraySubscriptExpr *Node) {
682  PrintExpr(Node->getLHS());
683  OS << "[";
684  PrintExpr(Node->getRHS());
685  OS << "]";
686}
687
688void StmtPrinter::VisitCallExpr(CallExpr *Call) {
689  PrintExpr(Call->getCallee());
690  OS << "(";
691  for (unsigned i = 0, e = Call->getNumArgs(); i != e; ++i) {
692    if (isa<CXXDefaultArgExpr>(Call->getArg(i))) {
693      // Don't print any defaulted arguments
694      break;
695    }
696
697    if (i) OS << ", ";
698    PrintExpr(Call->getArg(i));
699  }
700  OS << ")";
701}
702void StmtPrinter::VisitMemberExpr(MemberExpr *Node) {
703  PrintExpr(Node->getBase());
704  OS << (Node->isArrow() ? "->" : ".");
705
706  FieldDecl *Field = Node->getMemberDecl();
707  assert(Field && "MemberExpr should alway reference a field!");
708  OS << Field->getNameAsString();
709}
710void StmtPrinter::VisitExtVectorElementExpr(ExtVectorElementExpr *Node) {
711  PrintExpr(Node->getBase());
712  OS << ".";
713  OS << Node->getAccessor().getName();
714}
715void StmtPrinter::VisitCastExpr(CastExpr *) {
716  assert(0 && "CastExpr is an abstract class");
717}
718void StmtPrinter::VisitExplicitCastExpr(ExplicitCastExpr *) {
719  assert(0 && "ExplicitCastExpr is an abstract class");
720}
721void StmtPrinter::VisitCStyleCastExpr(CStyleCastExpr *Node) {
722  OS << "(" << Node->getType().getAsString() << ")";
723  PrintExpr(Node->getSubExpr());
724}
725void StmtPrinter::VisitCompoundLiteralExpr(CompoundLiteralExpr *Node) {
726  OS << "(" << Node->getType().getAsString() << ")";
727  PrintExpr(Node->getInitializer());
728}
729void StmtPrinter::VisitImplicitCastExpr(ImplicitCastExpr *Node) {
730  // No need to print anything, simply forward to the sub expression.
731  PrintExpr(Node->getSubExpr());
732}
733void StmtPrinter::VisitBinaryOperator(BinaryOperator *Node) {
734  PrintExpr(Node->getLHS());
735  OS << " " << BinaryOperator::getOpcodeStr(Node->getOpcode()) << " ";
736  PrintExpr(Node->getRHS());
737}
738void StmtPrinter::VisitCompoundAssignOperator(CompoundAssignOperator *Node) {
739  PrintExpr(Node->getLHS());
740  OS << " " << BinaryOperator::getOpcodeStr(Node->getOpcode()) << " ";
741  PrintExpr(Node->getRHS());
742}
743void StmtPrinter::VisitConditionalOperator(ConditionalOperator *Node) {
744  PrintExpr(Node->getCond());
745
746  if (Node->getLHS()) {
747    OS << " ? ";
748    PrintExpr(Node->getLHS());
749    OS << " : ";
750  }
751  else { // Handle GCC extention where LHS can be NULL.
752    OS << " ?: ";
753  }
754
755  PrintExpr(Node->getRHS());
756}
757
758// GNU extensions.
759
760void StmtPrinter::VisitAddrLabelExpr(AddrLabelExpr *Node) {
761  OS << "&&" << Node->getLabel()->getName();
762}
763
764void StmtPrinter::VisitStmtExpr(StmtExpr *E) {
765  OS << "(";
766  PrintRawCompoundStmt(E->getSubStmt());
767  OS << ")";
768}
769
770void StmtPrinter::VisitTypesCompatibleExpr(TypesCompatibleExpr *Node) {
771  OS << "__builtin_types_compatible_p(";
772  OS << Node->getArgType1().getAsString() << ",";
773  OS << Node->getArgType2().getAsString() << ")";
774}
775
776void StmtPrinter::VisitChooseExpr(ChooseExpr *Node) {
777  OS << "__builtin_choose_expr(";
778  PrintExpr(Node->getCond());
779  OS << ", ";
780  PrintExpr(Node->getLHS());
781  OS << ", ";
782  PrintExpr(Node->getRHS());
783  OS << ")";
784}
785
786void StmtPrinter::VisitGNUNullExpr(GNUNullExpr *) {
787  OS << "__null";
788}
789
790void StmtPrinter::VisitOverloadExpr(OverloadExpr *Node) {
791  OS << "__builtin_overload(";
792  for (unsigned i = 0, e = Node->getNumSubExprs(); i != e; ++i) {
793    if (i) OS << ", ";
794    PrintExpr(Node->getExpr(i));
795  }
796  OS << ")";
797}
798
799void StmtPrinter::VisitShuffleVectorExpr(ShuffleVectorExpr *Node) {
800  OS << "__builtin_shufflevector(";
801  for (unsigned i = 0, e = Node->getNumSubExprs(); i != e; ++i) {
802    if (i) OS << ", ";
803    PrintExpr(Node->getExpr(i));
804  }
805  OS << ")";
806}
807
808void StmtPrinter::VisitInitListExpr(InitListExpr* Node) {
809  OS << "{ ";
810  for (unsigned i = 0, e = Node->getNumInits(); i != e; ++i) {
811    if (i) OS << ", ";
812    PrintExpr(Node->getInit(i));
813  }
814  OS << " }";
815}
816
817void StmtPrinter::VisitVAArgExpr(VAArgExpr *Node) {
818  OS << "va_arg(";
819  PrintExpr(Node->getSubExpr());
820  OS << ", ";
821  OS << Node->getType().getAsString();
822  OS << ")";
823}
824
825// C++
826void StmtPrinter::VisitCXXOperatorCallExpr(CXXOperatorCallExpr *Node) {
827  const char *OpStrings[NUM_OVERLOADED_OPERATORS] = {
828    "",
829#define OVERLOADED_OPERATOR(Name,Spelling,Token,Unary,Binary,MemberOnly) \
830    Spelling,
831#include "clang/Basic/OperatorKinds.def"
832  };
833
834  OverloadedOperatorKind Kind = Node->getOperator();
835  if (Kind == OO_PlusPlus || Kind == OO_MinusMinus) {
836    if (Node->getNumArgs() == 1) {
837      OS << OpStrings[Kind] << ' ';
838      PrintExpr(Node->getArg(0));
839    } else {
840      PrintExpr(Node->getArg(0));
841      OS << ' ' << OpStrings[Kind];
842    }
843  } else if (Kind == OO_Call) {
844    PrintExpr(Node->getArg(0));
845    OS << '(';
846    for (unsigned ArgIdx = 1; ArgIdx < Node->getNumArgs(); ++ArgIdx) {
847      if (ArgIdx > 1)
848        OS << ", ";
849      if (!isa<CXXDefaultArgExpr>(Node->getArg(ArgIdx)))
850        PrintExpr(Node->getArg(ArgIdx));
851    }
852    OS << ')';
853  } else if (Kind == OO_Subscript) {
854    PrintExpr(Node->getArg(0));
855    OS << '[';
856    PrintExpr(Node->getArg(1));
857    OS << ']';
858  } else if (Node->getNumArgs() == 1) {
859    OS << OpStrings[Kind] << ' ';
860    PrintExpr(Node->getArg(0));
861  } else if (Node->getNumArgs() == 2) {
862    PrintExpr(Node->getArg(0));
863    OS << ' ' << OpStrings[Kind] << ' ';
864    PrintExpr(Node->getArg(1));
865  } else {
866    assert(false && "unknown overloaded operator");
867  }
868}
869
870void StmtPrinter::VisitCXXNamedCastExpr(CXXNamedCastExpr *Node) {
871  OS << Node->getCastName() << '<';
872  OS << Node->getTypeAsWritten().getAsString() << ">(";
873  PrintExpr(Node->getSubExpr());
874  OS << ")";
875}
876
877void StmtPrinter::VisitCXXStaticCastExpr(CXXStaticCastExpr *Node) {
878  VisitCXXNamedCastExpr(Node);
879}
880
881void StmtPrinter::VisitCXXDynamicCastExpr(CXXDynamicCastExpr *Node) {
882  VisitCXXNamedCastExpr(Node);
883}
884
885void StmtPrinter::VisitCXXReinterpretCastExpr(CXXReinterpretCastExpr *Node) {
886  VisitCXXNamedCastExpr(Node);
887}
888
889void StmtPrinter::VisitCXXConstCastExpr(CXXConstCastExpr *Node) {
890  VisitCXXNamedCastExpr(Node);
891}
892
893void StmtPrinter::VisitCXXTypeidExpr(CXXTypeidExpr *Node) {
894  OS << "typeid(";
895  if (Node->isTypeOperand()) {
896    OS << Node->getTypeOperand().getAsString();
897  } else {
898    PrintExpr(Node->getExprOperand());
899  }
900  OS << ")";
901}
902
903void StmtPrinter::VisitCXXBoolLiteralExpr(CXXBoolLiteralExpr *Node) {
904  OS << (Node->getValue() ? "true" : "false");
905}
906
907void StmtPrinter::VisitCXXThisExpr(CXXThisExpr *Node) {
908  OS << "this";
909}
910
911void StmtPrinter::VisitCXXThrowExpr(CXXThrowExpr *Node) {
912  if (Node->getSubExpr() == 0)
913    OS << "throw";
914  else {
915    OS << "throw ";
916    PrintExpr(Node->getSubExpr());
917  }
918}
919
920void StmtPrinter::VisitCXXDefaultArgExpr(CXXDefaultArgExpr *Node) {
921  // Nothing to print: we picked up the default argument
922}
923
924void StmtPrinter::VisitCXXFunctionalCastExpr(CXXFunctionalCastExpr *Node) {
925  OS << Node->getType().getAsString();
926  OS << "(";
927  PrintExpr(Node->getSubExpr());
928  OS << ")";
929}
930
931void StmtPrinter::VisitCXXZeroInitValueExpr(CXXZeroInitValueExpr *Node) {
932  OS << Node->getType().getAsString() << "()";
933}
934
935void
936StmtPrinter::VisitCXXConditionDeclExpr(CXXConditionDeclExpr *E) {
937  PrintRawDecl(E->getVarDecl());
938}
939
940void StmtPrinter::VisitCXXNewExpr(CXXNewExpr *E) {
941  if (E->isGlobalNew())
942    OS << "::";
943  OS << "new ";
944  unsigned NumPlace = E->getNumPlacementArgs();
945  if (NumPlace > 0) {
946    OS << "(";
947    PrintExpr(E->getPlacementArg(0));
948    for (unsigned i = 1; i < NumPlace; ++i) {
949      OS << ", ";
950      PrintExpr(E->getPlacementArg(i));
951    }
952    OS << ") ";
953  }
954  if (E->isParenTypeId())
955    OS << "(";
956  std::string TypeS;
957  if (Expr *Size = E->getArraySize()) {
958    llvm::raw_string_ostream s(TypeS);
959    Size->printPretty(s);
960    s.flush();
961    TypeS = "[" + TypeS + "]";
962  }
963  E->getAllocatedType().getAsStringInternal(TypeS);
964  OS << TypeS;
965  if (E->isParenTypeId())
966    OS << ")";
967
968  if (E->hasInitializer()) {
969    OS << "(";
970    unsigned NumCons = E->getNumConstructorArgs();
971    if (NumCons > 0) {
972      PrintExpr(E->getConstructorArg(0));
973      for (unsigned i = 1; i < NumCons; ++i) {
974        OS << ", ";
975        PrintExpr(E->getConstructorArg(i));
976      }
977    }
978    OS << ")";
979  }
980}
981
982void StmtPrinter::VisitCXXDeleteExpr(CXXDeleteExpr *E) {
983  if (E->isGlobalDelete())
984    OS << "::";
985  OS << "delete ";
986  if (E->isArrayForm())
987    OS << "[] ";
988  PrintExpr(E->getArgument());
989}
990
991// Obj-C
992
993void StmtPrinter::VisitObjCStringLiteral(ObjCStringLiteral *Node) {
994  OS << "@";
995  VisitStringLiteral(Node->getString());
996}
997
998void StmtPrinter::VisitObjCEncodeExpr(ObjCEncodeExpr *Node) {
999  OS << "@encode(" << Node->getEncodedType().getAsString() << ')';
1000}
1001
1002void StmtPrinter::VisitObjCSelectorExpr(ObjCSelectorExpr *Node) {
1003  OS << "@selector(" << Node->getSelector().getAsString() << ')';
1004}
1005
1006void StmtPrinter::VisitObjCProtocolExpr(ObjCProtocolExpr *Node) {
1007  OS << "@protocol(" << Node->getProtocol()->getNameAsString() << ')';
1008}
1009
1010void StmtPrinter::VisitObjCMessageExpr(ObjCMessageExpr *Mess) {
1011  OS << "[";
1012  Expr *receiver = Mess->getReceiver();
1013  if (receiver) PrintExpr(receiver);
1014  else OS << Mess->getClassName()->getName();
1015  OS << ' ';
1016  Selector selector = Mess->getSelector();
1017  if (selector.isUnarySelector()) {
1018    OS << selector.getIdentifierInfoForSlot(0)->getName();
1019  } else {
1020    for (unsigned i = 0, e = Mess->getNumArgs(); i != e; ++i) {
1021      if (i < selector.getNumArgs()) {
1022        if (i > 0) OS << ' ';
1023        if (selector.getIdentifierInfoForSlot(i))
1024          OS << selector.getIdentifierInfoForSlot(i)->getName() << ':';
1025        else
1026           OS << ":";
1027      }
1028      else OS << ", "; // Handle variadic methods.
1029
1030      PrintExpr(Mess->getArg(i));
1031    }
1032  }
1033  OS << "]";
1034}
1035
1036void StmtPrinter::VisitObjCSuperExpr(ObjCSuperExpr *) {
1037  OS << "super";
1038}
1039
1040void StmtPrinter::VisitBlockExpr(BlockExpr *Node) {
1041  BlockDecl *BD = Node->getBlockDecl();
1042  OS << "^";
1043
1044  const FunctionType *AFT = Node->getFunctionType();
1045
1046  if (isa<FunctionTypeNoProto>(AFT)) {
1047    OS << "()";
1048  } else if (!BD->param_empty() || cast<FunctionTypeProto>(AFT)->isVariadic()) {
1049    OS << '(';
1050    std::string ParamStr;
1051    for (BlockDecl::param_iterator AI = BD->param_begin(),
1052         E = BD->param_end(); AI != E; ++AI) {
1053      if (AI != BD->param_begin()) OS << ", ";
1054      ParamStr = (*AI)->getNameAsString();
1055      (*AI)->getType().getAsStringInternal(ParamStr);
1056      OS << ParamStr;
1057    }
1058
1059    const FunctionTypeProto *FT = cast<FunctionTypeProto>(AFT);
1060    if (FT->isVariadic()) {
1061      if (!BD->param_empty()) OS << ", ";
1062      OS << "...";
1063    }
1064    OS << ')';
1065  }
1066}
1067
1068void StmtPrinter::VisitBlockDeclRefExpr(BlockDeclRefExpr *Node) {
1069  OS << Node->getDecl()->getNameAsString();
1070}
1071//===----------------------------------------------------------------------===//
1072// Stmt method implementations
1073//===----------------------------------------------------------------------===//
1074
1075void Stmt::dumpPretty() const {
1076  printPretty(llvm::errs());
1077}
1078
1079void Stmt::printPretty(llvm::raw_ostream &OS, PrinterHelper* Helper) const {
1080  if (this == 0) {
1081    OS << "<NULL>";
1082    return;
1083  }
1084
1085  StmtPrinter P(OS, Helper);
1086  P.Visit(const_cast<Stmt*>(this));
1087}
1088
1089//===----------------------------------------------------------------------===//
1090// PrinterHelper
1091//===----------------------------------------------------------------------===//
1092
1093// Implement virtual destructor.
1094PrinterHelper::~PrinterHelper() {}
1095