StmtPrinter.cpp revision 5daf570d0ce027e18ed5f9d66e6b2a14a40b720d 
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->getName();
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->getName();
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()->getName();
487}
488
489void StmtPrinter::VisitObjCIvarRefExpr(ObjCIvarRefExpr *Node) {
490  if (Node->getBase()) {
491    PrintExpr(Node->getBase());
492    OS << (Node->isArrow() ? "->" : ".");
493  }
494  OS << Node->getDecl()->getName();
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()->getName();
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->getName();
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::VisitOverloadExpr(OverloadExpr *Node) {
787  OS << "__builtin_overload(";
788  for (unsigned i = 0, e = Node->getNumSubExprs(); i != e; ++i) {
789    if (i) OS << ", ";
790    PrintExpr(Node->getExpr(i));
791  }
792  OS << ")";
793}
794
795void StmtPrinter::VisitShuffleVectorExpr(ShuffleVectorExpr *Node) {
796  OS << "__builtin_shufflevector(";
797  for (unsigned i = 0, e = Node->getNumSubExprs(); i != e; ++i) {
798    if (i) OS << ", ";
799    PrintExpr(Node->getExpr(i));
800  }
801  OS << ")";
802}
803
804void StmtPrinter::VisitInitListExpr(InitListExpr* Node) {
805  OS << "{ ";
806  for (unsigned i = 0, e = Node->getNumInits(); i != e; ++i) {
807    if (i) OS << ", ";
808    PrintExpr(Node->getInit(i));
809  }
810  OS << " }";
811}
812
813void StmtPrinter::VisitVAArgExpr(VAArgExpr *Node) {
814  OS << "va_arg(";
815  PrintExpr(Node->getSubExpr());
816  OS << ", ";
817  OS << Node->getType().getAsString();
818  OS << ")";
819}
820
821// C++
822void StmtPrinter::VisitCXXOperatorCallExpr(CXXOperatorCallExpr *Node) {
823  const char *OpStrings[NUM_OVERLOADED_OPERATORS] = {
824    "",
825#define OVERLOADED_OPERATOR(Name,Spelling,Token,Unary,Binary,MemberOnly) \
826    Spelling,
827#include "clang/Basic/OperatorKinds.def"
828  };
829
830  OverloadedOperatorKind Kind = Node->getOperator();
831  if (Kind == OO_PlusPlus || Kind == OO_MinusMinus) {
832    if (Node->getNumArgs() == 1) {
833      OS << OpStrings[Kind] << ' ';
834      PrintExpr(Node->getArg(0));
835    } else {
836      PrintExpr(Node->getArg(0));
837      OS << ' ' << OpStrings[Kind];
838    }
839  } else if (Kind == OO_Call) {
840    PrintExpr(Node->getArg(0));
841    OS << '(';
842    for (unsigned ArgIdx = 1; ArgIdx < Node->getNumArgs(); ++ArgIdx) {
843      if (ArgIdx > 1)
844        OS << ", ";
845      if (!isa<CXXDefaultArgExpr>(Node->getArg(ArgIdx)))
846        PrintExpr(Node->getArg(ArgIdx));
847    }
848    OS << ')';
849  } else if (Kind == OO_Subscript) {
850    PrintExpr(Node->getArg(0));
851    OS << '[';
852    PrintExpr(Node->getArg(1));
853    OS << ']';
854  } else if (Node->getNumArgs() == 1) {
855    OS << OpStrings[Kind] << ' ';
856    PrintExpr(Node->getArg(0));
857  } else if (Node->getNumArgs() == 2) {
858    PrintExpr(Node->getArg(0));
859    OS << ' ' << OpStrings[Kind] << ' ';
860    PrintExpr(Node->getArg(1));
861  } else {
862    assert(false && "unknown overloaded operator");
863  }
864}
865
866void StmtPrinter::VisitCXXNamedCastExpr(CXXNamedCastExpr *Node) {
867  OS << Node->getCastName() << '<';
868  OS << Node->getTypeAsWritten().getAsString() << ">(";
869  PrintExpr(Node->getSubExpr());
870  OS << ")";
871}
872
873void StmtPrinter::VisitCXXStaticCastExpr(CXXStaticCastExpr *Node) {
874  VisitCXXNamedCastExpr(Node);
875}
876
877void StmtPrinter::VisitCXXDynamicCastExpr(CXXDynamicCastExpr *Node) {
878  VisitCXXNamedCastExpr(Node);
879}
880
881void StmtPrinter::VisitCXXReinterpretCastExpr(CXXReinterpretCastExpr *Node) {
882  VisitCXXNamedCastExpr(Node);
883}
884
885void StmtPrinter::VisitCXXConstCastExpr(CXXConstCastExpr *Node) {
886  VisitCXXNamedCastExpr(Node);
887}
888
889void StmtPrinter::VisitCXXTypeidExpr(CXXTypeidExpr *Node) {
890  OS << "typeid(";
891  if (Node->isTypeOperand()) {
892    OS << Node->getTypeOperand().getAsString();
893  } else {
894    PrintExpr(Node->getExprOperand());
895  }
896  OS << ")";
897}
898
899void StmtPrinter::VisitCXXBoolLiteralExpr(CXXBoolLiteralExpr *Node) {
900  OS << (Node->getValue() ? "true" : "false");
901}
902
903void StmtPrinter::VisitCXXThisExpr(CXXThisExpr *Node) {
904  OS << "this";
905}
906
907void StmtPrinter::VisitCXXThrowExpr(CXXThrowExpr *Node) {
908  if (Node->getSubExpr() == 0)
909    OS << "throw";
910  else {
911    OS << "throw ";
912    PrintExpr(Node->getSubExpr());
913  }
914}
915
916void StmtPrinter::VisitCXXDefaultArgExpr(CXXDefaultArgExpr *Node) {
917  // Nothing to print: we picked up the default argument
918}
919
920void StmtPrinter::VisitCXXFunctionalCastExpr(CXXFunctionalCastExpr *Node) {
921  OS << Node->getType().getAsString();
922  OS << "(";
923  PrintExpr(Node->getSubExpr());
924  OS << ")";
925}
926
927void StmtPrinter::VisitCXXZeroInitValueExpr(CXXZeroInitValueExpr *Node) {
928  OS << Node->getType().getAsString() << "()";
929}
930
931void
932StmtPrinter::VisitCXXConditionDeclExpr(CXXConditionDeclExpr *E) {
933  PrintRawDecl(E->getVarDecl());
934}
935
936void StmtPrinter::VisitCXXNewExpr(CXXNewExpr *E) {
937  if (E->isGlobalNew())
938    OS << "::";
939  OS << "new ";
940  unsigned NumPlace = E->getNumPlacementArgs();
941  if (NumPlace > 0) {
942    OS << "(";
943    PrintExpr(E->getPlacementArg(0));
944    for (unsigned i = 1; i < NumPlace; ++i) {
945      OS << ", ";
946      PrintExpr(E->getPlacementArg(i));
947    }
948    OS << ") ";
949  }
950  if (E->isParenTypeId())
951    OS << "(";
952  OS << E->getAllocatedType().getAsString();
953  if (E->isParenTypeId())
954    OS << ")";
955
956  if (E->hasInitializer()) {
957    OS << "(";
958    unsigned NumCons = E->getNumConstructorArgs();
959    if (NumCons > 0) {
960      PrintExpr(E->getConstructorArg(0));
961      for (unsigned i = 1; i < NumCons; ++i) {
962        OS << ", ";
963        PrintExpr(E->getConstructorArg(i));
964      }
965    }
966    OS << ")";
967  }
968}
969
970void StmtPrinter::VisitCXXDeleteExpr(CXXDeleteExpr *E) {
971  if (E->isGlobalDelete())
972    OS << "::";
973  OS << "delete ";
974  if (E->isArrayForm())
975    OS << "[] ";
976  PrintExpr(E->getArgument());
977}
978
979// Obj-C
980
981void StmtPrinter::VisitObjCStringLiteral(ObjCStringLiteral *Node) {
982  OS << "@";
983  VisitStringLiteral(Node->getString());
984}
985
986void StmtPrinter::VisitObjCEncodeExpr(ObjCEncodeExpr *Node) {
987  OS << "@encode(" << Node->getEncodedType().getAsString() << ")";
988}
989
990void StmtPrinter::VisitObjCSelectorExpr(ObjCSelectorExpr *Node) {
991  OS << "@selector(" << Node->getSelector().getName() << ")";
992}
993
994void StmtPrinter::VisitObjCProtocolExpr(ObjCProtocolExpr *Node) {
995  OS << "@protocol(" << Node->getProtocol()->getName() << ")";
996}
997
998void StmtPrinter::VisitObjCMessageExpr(ObjCMessageExpr *Mess) {
999  OS << "[";
1000  Expr *receiver = Mess->getReceiver();
1001  if (receiver) PrintExpr(receiver);
1002  else OS << Mess->getClassName()->getName();
1003  OS << ' ';
1004  Selector selector = Mess->getSelector();
1005  if (selector.isUnarySelector()) {
1006    OS << selector.getIdentifierInfoForSlot(0)->getName();
1007  } else {
1008    for (unsigned i = 0, e = Mess->getNumArgs(); i != e; ++i) {
1009      if (i < selector.getNumArgs()) {
1010        if (i > 0) OS << ' ';
1011        if (selector.getIdentifierInfoForSlot(i))
1012          OS << selector.getIdentifierInfoForSlot(i)->getName() << ":";
1013        else
1014           OS << ":";
1015      }
1016      else OS << ", "; // Handle variadic methods.
1017
1018      PrintExpr(Mess->getArg(i));
1019    }
1020  }
1021  OS << "]";
1022}
1023
1024void StmtPrinter::VisitObjCSuperExpr(ObjCSuperExpr *) {
1025  OS << "super";
1026}
1027
1028void StmtPrinter::VisitBlockExpr(BlockExpr *Node) {
1029  BlockDecl *BD = Node->getBlockDecl();
1030  OS << "^";
1031
1032  const FunctionType *AFT = Node->getFunctionType();
1033
1034  if (isa<FunctionTypeNoProto>(AFT)) {
1035    OS << "()";
1036  } else if (!BD->param_empty() || cast<FunctionTypeProto>(AFT)->isVariadic()) {
1037    OS << '(';
1038    std::string ParamStr;
1039    for (BlockDecl::param_iterator AI = BD->param_begin(),
1040         E = BD->param_end(); AI != E; ++AI) {
1041      if (AI != BD->param_begin()) OS << ", ";
1042      ParamStr = (*AI)->getName();
1043      (*AI)->getType().getAsStringInternal(ParamStr);
1044      OS << ParamStr;
1045    }
1046
1047    const FunctionTypeProto *FT = cast<FunctionTypeProto>(AFT);
1048    if (FT->isVariadic()) {
1049      if (!BD->param_empty()) OS << ", ";
1050      OS << "...";
1051    }
1052    OS << ')';
1053  }
1054}
1055
1056void StmtPrinter::VisitBlockDeclRefExpr(BlockDeclRefExpr *Node) {
1057  OS << Node->getDecl()->getName();
1058}
1059//===----------------------------------------------------------------------===//
1060// Stmt method implementations
1061//===----------------------------------------------------------------------===//
1062
1063void Stmt::dumpPretty() const {
1064  printPretty(llvm::errs());
1065}
1066
1067void Stmt::printPretty(llvm::raw_ostream &OS, PrinterHelper* Helper) const {
1068  if (this == 0) {
1069    OS << "<NULL>";
1070    return;
1071  }
1072
1073  StmtPrinter P(OS, Helper);
1074  P.Visit(const_cast<Stmt*>(this));
1075}
1076
1077//===----------------------------------------------------------------------===//
1078// PrinterHelper
1079//===----------------------------------------------------------------------===//
1080
1081// Implement virtual destructor.
1082PrinterHelper::~PrinterHelper() {}
1083