StmtPrinter.cpp revision 99e9b4d172f6877e6ba5ebe75bb8238721f5e01c 
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      PrintRawCompoundStmt(CS);
405      OS << "\n";
406    }
407  }
408
409  if (ObjCAtFinallyStmt *FS = static_cast<ObjCAtFinallyStmt *>(
410        Node->getFinallyStmt())) {
411    Indent() << "@finally";
412    PrintRawCompoundStmt(dyn_cast<CompoundStmt>(FS->getFinallyBody()));
413    OS << "\n";
414  }
415}
416
417void StmtPrinter::VisitObjCAtFinallyStmt(ObjCAtFinallyStmt *Node) {
418}
419
420void StmtPrinter::VisitObjCAtCatchStmt (ObjCAtCatchStmt *Node) {
421  Indent() << "@catch (...) { /* todo */ } \n";
422}
423
424void StmtPrinter::VisitObjCAtThrowStmt(ObjCAtThrowStmt *Node) {
425  Indent() << "@throw";
426  if (Node->getThrowExpr()) {
427    OS << " ";
428    PrintExpr(Node->getThrowExpr());
429  }
430  OS << ";\n";
431}
432
433void StmtPrinter::VisitObjCAtSynchronizedStmt(ObjCAtSynchronizedStmt *Node) {
434  Indent() << "@synchronized (";
435  PrintExpr(Node->getSynchExpr());
436  OS << ")";
437  PrintRawCompoundStmt(Node->getSynchBody());
438  OS << "\n";
439}
440
441void StmtPrinter::PrintRawCXXCatchStmt(CXXCatchStmt *Node) {
442  OS << "catch (";
443  if (Decl *ExDecl = Node->getExceptionDecl())
444    PrintRawDecl(ExDecl);
445  else
446    OS << "...";
447  OS << ") ";
448  PrintRawCompoundStmt(cast<CompoundStmt>(Node->getHandlerBlock()));
449}
450
451void StmtPrinter::VisitCXXCatchStmt(CXXCatchStmt *Node) {
452  Indent();
453  PrintRawCXXCatchStmt(Node);
454  OS << "\n";
455}
456
457void StmtPrinter::VisitCXXTryStmt(CXXTryStmt *Node) {
458  Indent() << "try ";
459  PrintRawCompoundStmt(Node->getTryBlock());
460  for (unsigned i = 0, e = Node->getNumHandlers(); i < e; ++i) {
461    OS << " ";
462    PrintRawCXXCatchStmt(Node->getHandler(i));
463  }
464  OS << "\n";
465}
466
467//===----------------------------------------------------------------------===//
468//  Expr printing methods.
469//===----------------------------------------------------------------------===//
470
471void StmtPrinter::VisitExpr(Expr *Node) {
472  OS << "<<unknown expr type>>";
473}
474
475void StmtPrinter::VisitDeclRefExpr(DeclRefExpr *Node) {
476  if (NestedNameSpecifier *Qualifier = Node->getQualifier())
477    Qualifier->print(OS, Policy);
478  OS << Node->getDecl()->getNameAsString();
479  if (Node->hasExplicitTemplateArgumentList())
480    OS << TemplateSpecializationType::PrintTemplateArgumentList(
481                                                    Node->getTemplateArgs(),
482                                                    Node->getNumTemplateArgs(),
483                                                    Policy);
484}
485
486void StmtPrinter::VisitDependentScopeDeclRefExpr(
487                                           DependentScopeDeclRefExpr *Node) {
488  Node->getQualifier()->print(OS, Policy);
489  OS << Node->getDeclName().getAsString();
490  if (Node->hasExplicitTemplateArgs())
491    OS << TemplateSpecializationType::PrintTemplateArgumentList(
492                                                   Node->getTemplateArgs(),
493                                                   Node->getNumTemplateArgs(),
494                                                   Policy);
495}
496
497void StmtPrinter::VisitUnresolvedLookupExpr(UnresolvedLookupExpr *Node) {
498  if (Node->getQualifier())
499    Node->getQualifier()->print(OS, Policy);
500  OS << Node->getName().getAsString();
501  if (Node->hasExplicitTemplateArgs())
502    OS << TemplateSpecializationType::PrintTemplateArgumentList(
503                                                   Node->getTemplateArgs(),
504                                                   Node->getNumTemplateArgs(),
505                                                   Policy);
506}
507
508void StmtPrinter::VisitObjCIvarRefExpr(ObjCIvarRefExpr *Node) {
509  if (Node->getBase()) {
510    PrintExpr(Node->getBase());
511    OS << (Node->isArrow() ? "->" : ".");
512  }
513  OS << Node->getDecl()->getNameAsString();
514}
515
516void StmtPrinter::VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *Node) {
517  if (Node->getBase()) {
518    PrintExpr(Node->getBase());
519    OS << ".";
520  }
521  OS << Node->getProperty()->getNameAsCString();
522}
523
524void StmtPrinter::VisitObjCImplicitSetterGetterRefExpr(
525                                        ObjCImplicitSetterGetterRefExpr *Node) {
526  if (Node->getBase()) {
527    PrintExpr(Node->getBase());
528    OS << ".";
529  }
530  if (Node->getGetterMethod())
531    OS << Node->getGetterMethod()->getNameAsString();
532
533}
534
535void StmtPrinter::VisitPredefinedExpr(PredefinedExpr *Node) {
536  switch (Node->getIdentType()) {
537    default:
538      assert(0 && "unknown case");
539    case PredefinedExpr::Func:
540      OS << "__func__";
541      break;
542    case PredefinedExpr::Function:
543      OS << "__FUNCTION__";
544      break;
545    case PredefinedExpr::PrettyFunction:
546      OS << "__PRETTY_FUNCTION__";
547      break;
548  }
549}
550
551void StmtPrinter::VisitCharacterLiteral(CharacterLiteral *Node) {
552  unsigned value = Node->getValue();
553  if (Node->isWide())
554    OS << "L";
555  switch (value) {
556  case '\\':
557    OS << "'\\\\'";
558    break;
559  case '\'':
560    OS << "'\\''";
561    break;
562  case '\a':
563    // TODO: K&R: the meaning of '\\a' is different in traditional C
564    OS << "'\\a'";
565    break;
566  case '\b':
567    OS << "'\\b'";
568    break;
569  // Nonstandard escape sequence.
570  /*case '\e':
571    OS << "'\\e'";
572    break;*/
573  case '\f':
574    OS << "'\\f'";
575    break;
576  case '\n':
577    OS << "'\\n'";
578    break;
579  case '\r':
580    OS << "'\\r'";
581    break;
582  case '\t':
583    OS << "'\\t'";
584    break;
585  case '\v':
586    OS << "'\\v'";
587    break;
588  default:
589    if (value < 256 && isprint(value)) {
590      OS << "'" << (char)value << "'";
591    } else if (value < 256) {
592      OS << "'\\x" << llvm::format("%x", value) << "'";
593    } else {
594      // FIXME what to really do here?
595      OS << value;
596    }
597  }
598}
599
600void StmtPrinter::VisitIntegerLiteral(IntegerLiteral *Node) {
601  bool isSigned = Node->getType()->isSignedIntegerType();
602  OS << Node->getValue().toString(10, isSigned);
603
604  // Emit suffixes.  Integer literals are always a builtin integer type.
605  switch (Node->getType()->getAs<BuiltinType>()->getKind()) {
606  default: assert(0 && "Unexpected type for integer literal!");
607  case BuiltinType::Int:       break; // no suffix.
608  case BuiltinType::UInt:      OS << 'U'; break;
609  case BuiltinType::Long:      OS << 'L'; break;
610  case BuiltinType::ULong:     OS << "UL"; break;
611  case BuiltinType::LongLong:  OS << "LL"; break;
612  case BuiltinType::ULongLong: OS << "ULL"; break;
613  }
614}
615void StmtPrinter::VisitFloatingLiteral(FloatingLiteral *Node) {
616  // FIXME: print value more precisely.
617  OS << Node->getValueAsApproximateDouble();
618}
619
620void StmtPrinter::VisitImaginaryLiteral(ImaginaryLiteral *Node) {
621  PrintExpr(Node->getSubExpr());
622  OS << "i";
623}
624
625void StmtPrinter::VisitStringLiteral(StringLiteral *Str) {
626  if (Str->isWide()) OS << 'L';
627  OS << '"';
628
629  // FIXME: this doesn't print wstrings right.
630  for (unsigned i = 0, e = Str->getByteLength(); i != e; ++i) {
631    unsigned char Char = Str->getStrData()[i];
632
633    switch (Char) {
634    default:
635      if (isprint(Char))
636        OS << (char)Char;
637      else  // Output anything hard as an octal escape.
638        OS << '\\'
639        << (char)('0'+ ((Char >> 6) & 7))
640        << (char)('0'+ ((Char >> 3) & 7))
641        << (char)('0'+ ((Char >> 0) & 7));
642      break;
643    // Handle some common non-printable cases to make dumps prettier.
644    case '\\': OS << "\\\\"; break;
645    case '"': OS << "\\\""; break;
646    case '\n': OS << "\\n"; break;
647    case '\t': OS << "\\t"; break;
648    case '\a': OS << "\\a"; break;
649    case '\b': OS << "\\b"; break;
650    }
651  }
652  OS << '"';
653}
654void StmtPrinter::VisitParenExpr(ParenExpr *Node) {
655  OS << "(";
656  PrintExpr(Node->getSubExpr());
657  OS << ")";
658}
659void StmtPrinter::VisitUnaryOperator(UnaryOperator *Node) {
660  if (!Node->isPostfix()) {
661    OS << UnaryOperator::getOpcodeStr(Node->getOpcode());
662
663    // Print a space if this is an "identifier operator" like __real, or if
664    // it might be concatenated incorrectly like '+'.
665    switch (Node->getOpcode()) {
666    default: break;
667    case UnaryOperator::Real:
668    case UnaryOperator::Imag:
669    case UnaryOperator::Extension:
670      OS << ' ';
671      break;
672    case UnaryOperator::Plus:
673    case UnaryOperator::Minus:
674      if (isa<UnaryOperator>(Node->getSubExpr()))
675        OS << ' ';
676      break;
677    }
678  }
679  PrintExpr(Node->getSubExpr());
680
681  if (Node->isPostfix())
682    OS << UnaryOperator::getOpcodeStr(Node->getOpcode());
683}
684
685bool StmtPrinter::PrintOffsetOfDesignator(Expr *E) {
686  if (isa<UnaryOperator>(E)) {
687    // Base case, print the type and comma.
688    OS << E->getType().getAsString() << ", ";
689    return true;
690  } else if (ArraySubscriptExpr *ASE = dyn_cast<ArraySubscriptExpr>(E)) {
691    PrintOffsetOfDesignator(ASE->getLHS());
692    OS << "[";
693    PrintExpr(ASE->getRHS());
694    OS << "]";
695    return false;
696  } else {
697    MemberExpr *ME = cast<MemberExpr>(E);
698    bool IsFirst = PrintOffsetOfDesignator(ME->getBase());
699    OS << (IsFirst ? "" : ".") << ME->getMemberDecl()->getNameAsString();
700    return false;
701  }
702}
703
704void StmtPrinter::VisitUnaryOffsetOf(UnaryOperator *Node) {
705  OS << "__builtin_offsetof(";
706  PrintOffsetOfDesignator(Node->getSubExpr());
707  OS << ")";
708}
709
710void StmtPrinter::VisitSizeOfAlignOfExpr(SizeOfAlignOfExpr *Node) {
711  OS << (Node->isSizeOf() ? "sizeof" : "__alignof");
712  if (Node->isArgumentType())
713    OS << "(" << Node->getArgumentType().getAsString() << ")";
714  else {
715    OS << " ";
716    PrintExpr(Node->getArgumentExpr());
717  }
718}
719void StmtPrinter::VisitArraySubscriptExpr(ArraySubscriptExpr *Node) {
720  PrintExpr(Node->getLHS());
721  OS << "[";
722  PrintExpr(Node->getRHS());
723  OS << "]";
724}
725
726void StmtPrinter::VisitCallExpr(CallExpr *Call) {
727  PrintExpr(Call->getCallee());
728  OS << "(";
729  for (unsigned i = 0, e = Call->getNumArgs(); i != e; ++i) {
730    if (isa<CXXDefaultArgExpr>(Call->getArg(i))) {
731      // Don't print any defaulted arguments
732      break;
733    }
734
735    if (i) OS << ", ";
736    PrintExpr(Call->getArg(i));
737  }
738  OS << ")";
739}
740void StmtPrinter::VisitMemberExpr(MemberExpr *Node) {
741  // FIXME: Suppress printing implicit bases (like "this")
742  PrintExpr(Node->getBase());
743  OS << (Node->isArrow() ? "->" : ".");
744  // FIXME: Suppress printing references to unnamed objects
745  // representing anonymous unions/structs
746  if (NestedNameSpecifier *Qualifier = Node->getQualifier())
747    Qualifier->print(OS, Policy);
748
749  OS << Node->getMemberDecl()->getNameAsString();
750
751  if (Node->hasExplicitTemplateArgumentList())
752    OS << TemplateSpecializationType::PrintTemplateArgumentList(
753                                                    Node->getTemplateArgs(),
754                                                    Node->getNumTemplateArgs(),
755                                                                Policy);
756}
757void StmtPrinter::VisitObjCIsaExpr(ObjCIsaExpr *Node) {
758  PrintExpr(Node->getBase());
759  OS << (Node->isArrow() ? "->isa" : ".isa");
760}
761
762void StmtPrinter::VisitExtVectorElementExpr(ExtVectorElementExpr *Node) {
763  PrintExpr(Node->getBase());
764  OS << ".";
765  OS << Node->getAccessor().getName();
766}
767void StmtPrinter::VisitCastExpr(CastExpr *) {
768  assert(0 && "CastExpr is an abstract class");
769}
770void StmtPrinter::VisitExplicitCastExpr(ExplicitCastExpr *) {
771  assert(0 && "ExplicitCastExpr is an abstract class");
772}
773void StmtPrinter::VisitCStyleCastExpr(CStyleCastExpr *Node) {
774  OS << "(" << Node->getType().getAsString() << ")";
775  PrintExpr(Node->getSubExpr());
776}
777void StmtPrinter::VisitCompoundLiteralExpr(CompoundLiteralExpr *Node) {
778  OS << "(" << Node->getType().getAsString() << ")";
779  PrintExpr(Node->getInitializer());
780}
781void StmtPrinter::VisitImplicitCastExpr(ImplicitCastExpr *Node) {
782  // No need to print anything, simply forward to the sub expression.
783  PrintExpr(Node->getSubExpr());
784}
785void StmtPrinter::VisitBinaryOperator(BinaryOperator *Node) {
786  PrintExpr(Node->getLHS());
787  OS << " " << BinaryOperator::getOpcodeStr(Node->getOpcode()) << " ";
788  PrintExpr(Node->getRHS());
789}
790void StmtPrinter::VisitCompoundAssignOperator(CompoundAssignOperator *Node) {
791  PrintExpr(Node->getLHS());
792  OS << " " << BinaryOperator::getOpcodeStr(Node->getOpcode()) << " ";
793  PrintExpr(Node->getRHS());
794}
795void StmtPrinter::VisitConditionalOperator(ConditionalOperator *Node) {
796  PrintExpr(Node->getCond());
797
798  if (Node->getLHS()) {
799    OS << " ? ";
800    PrintExpr(Node->getLHS());
801    OS << " : ";
802  }
803  else { // Handle GCC extension where LHS can be NULL.
804    OS << " ?: ";
805  }
806
807  PrintExpr(Node->getRHS());
808}
809
810// GNU extensions.
811
812void StmtPrinter::VisitAddrLabelExpr(AddrLabelExpr *Node) {
813  OS << "&&" << Node->getLabel()->getName();
814}
815
816void StmtPrinter::VisitStmtExpr(StmtExpr *E) {
817  OS << "(";
818  PrintRawCompoundStmt(E->getSubStmt());
819  OS << ")";
820}
821
822void StmtPrinter::VisitTypesCompatibleExpr(TypesCompatibleExpr *Node) {
823  OS << "__builtin_types_compatible_p(";
824  OS << Node->getArgType1().getAsString() << ",";
825  OS << Node->getArgType2().getAsString() << ")";
826}
827
828void StmtPrinter::VisitChooseExpr(ChooseExpr *Node) {
829  OS << "__builtin_choose_expr(";
830  PrintExpr(Node->getCond());
831  OS << ", ";
832  PrintExpr(Node->getLHS());
833  OS << ", ";
834  PrintExpr(Node->getRHS());
835  OS << ")";
836}
837
838void StmtPrinter::VisitGNUNullExpr(GNUNullExpr *) {
839  OS << "__null";
840}
841
842void StmtPrinter::VisitShuffleVectorExpr(ShuffleVectorExpr *Node) {
843  OS << "__builtin_shufflevector(";
844  for (unsigned i = 0, e = Node->getNumSubExprs(); i != e; ++i) {
845    if (i) OS << ", ";
846    PrintExpr(Node->getExpr(i));
847  }
848  OS << ")";
849}
850
851void StmtPrinter::VisitInitListExpr(InitListExpr* Node) {
852  if (Node->getSyntacticForm()) {
853    Visit(Node->getSyntacticForm());
854    return;
855  }
856
857  OS << "{ ";
858  for (unsigned i = 0, e = Node->getNumInits(); i != e; ++i) {
859    if (i) OS << ", ";
860    if (Node->getInit(i))
861      PrintExpr(Node->getInit(i));
862    else
863      OS << "0";
864  }
865  OS << " }";
866}
867
868void StmtPrinter::VisitParenListExpr(ParenListExpr* Node) {
869  OS << "( ";
870  for (unsigned i = 0, e = Node->getNumExprs(); i != e; ++i) {
871    if (i) OS << ", ";
872    PrintExpr(Node->getExpr(i));
873  }
874  OS << " )";
875}
876
877void StmtPrinter::VisitDesignatedInitExpr(DesignatedInitExpr *Node) {
878  for (DesignatedInitExpr::designators_iterator D = Node->designators_begin(),
879                      DEnd = Node->designators_end();
880       D != DEnd; ++D) {
881    if (D->isFieldDesignator()) {
882      if (D->getDotLoc().isInvalid())
883        OS << D->getFieldName()->getName() << ":";
884      else
885        OS << "." << D->getFieldName()->getName();
886    } else {
887      OS << "[";
888      if (D->isArrayDesignator()) {
889        PrintExpr(Node->getArrayIndex(*D));
890      } else {
891        PrintExpr(Node->getArrayRangeStart(*D));
892        OS << " ... ";
893        PrintExpr(Node->getArrayRangeEnd(*D));
894      }
895      OS << "]";
896    }
897  }
898
899  OS << " = ";
900  PrintExpr(Node->getInit());
901}
902
903void StmtPrinter::VisitImplicitValueInitExpr(ImplicitValueInitExpr *Node) {
904  if (Policy.LangOpts.CPlusPlus)
905    OS << "/*implicit*/" << Node->getType().getAsString(Policy) << "()";
906  else {
907    OS << "/*implicit*/(" << Node->getType().getAsString(Policy) << ")";
908    if (Node->getType()->isRecordType())
909      OS << "{}";
910    else
911      OS << 0;
912  }
913}
914
915void StmtPrinter::VisitVAArgExpr(VAArgExpr *Node) {
916  OS << "__builtin_va_arg(";
917  PrintExpr(Node->getSubExpr());
918  OS << ", ";
919  OS << Node->getType().getAsString();
920  OS << ")";
921}
922
923// C++
924void StmtPrinter::VisitCXXOperatorCallExpr(CXXOperatorCallExpr *Node) {
925  const char *OpStrings[NUM_OVERLOADED_OPERATORS] = {
926    "",
927#define OVERLOADED_OPERATOR(Name,Spelling,Token,Unary,Binary,MemberOnly) \
928    Spelling,
929#include "clang/Basic/OperatorKinds.def"
930  };
931
932  OverloadedOperatorKind Kind = Node->getOperator();
933  if (Kind == OO_PlusPlus || Kind == OO_MinusMinus) {
934    if (Node->getNumArgs() == 1) {
935      OS << OpStrings[Kind] << ' ';
936      PrintExpr(Node->getArg(0));
937    } else {
938      PrintExpr(Node->getArg(0));
939      OS << ' ' << OpStrings[Kind];
940    }
941  } else if (Kind == OO_Call) {
942    PrintExpr(Node->getArg(0));
943    OS << '(';
944    for (unsigned ArgIdx = 1; ArgIdx < Node->getNumArgs(); ++ArgIdx) {
945      if (ArgIdx > 1)
946        OS << ", ";
947      if (!isa<CXXDefaultArgExpr>(Node->getArg(ArgIdx)))
948        PrintExpr(Node->getArg(ArgIdx));
949    }
950    OS << ')';
951  } else if (Kind == OO_Subscript) {
952    PrintExpr(Node->getArg(0));
953    OS << '[';
954    PrintExpr(Node->getArg(1));
955    OS << ']';
956  } else if (Node->getNumArgs() == 1) {
957    OS << OpStrings[Kind] << ' ';
958    PrintExpr(Node->getArg(0));
959  } else if (Node->getNumArgs() == 2) {
960    PrintExpr(Node->getArg(0));
961    OS << ' ' << OpStrings[Kind] << ' ';
962    PrintExpr(Node->getArg(1));
963  } else {
964    assert(false && "unknown overloaded operator");
965  }
966}
967
968void StmtPrinter::VisitCXXMemberCallExpr(CXXMemberCallExpr *Node) {
969  VisitCallExpr(cast<CallExpr>(Node));
970}
971
972void StmtPrinter::VisitCXXNamedCastExpr(CXXNamedCastExpr *Node) {
973  OS << Node->getCastName() << '<';
974  OS << Node->getTypeAsWritten().getAsString() << ">(";
975  PrintExpr(Node->getSubExpr());
976  OS << ")";
977}
978
979void StmtPrinter::VisitCXXStaticCastExpr(CXXStaticCastExpr *Node) {
980  VisitCXXNamedCastExpr(Node);
981}
982
983void StmtPrinter::VisitCXXDynamicCastExpr(CXXDynamicCastExpr *Node) {
984  VisitCXXNamedCastExpr(Node);
985}
986
987void StmtPrinter::VisitCXXReinterpretCastExpr(CXXReinterpretCastExpr *Node) {
988  VisitCXXNamedCastExpr(Node);
989}
990
991void StmtPrinter::VisitCXXConstCastExpr(CXXConstCastExpr *Node) {
992  VisitCXXNamedCastExpr(Node);
993}
994
995void StmtPrinter::VisitCXXTypeidExpr(CXXTypeidExpr *Node) {
996  OS << "typeid(";
997  if (Node->isTypeOperand()) {
998    OS << Node->getTypeOperand().getAsString();
999  } else {
1000    PrintExpr(Node->getExprOperand());
1001  }
1002  OS << ")";
1003}
1004
1005void StmtPrinter::VisitCXXBoolLiteralExpr(CXXBoolLiteralExpr *Node) {
1006  OS << (Node->getValue() ? "true" : "false");
1007}
1008
1009void StmtPrinter::VisitCXXNullPtrLiteralExpr(CXXNullPtrLiteralExpr *Node) {
1010  OS << "nullptr";
1011}
1012
1013void StmtPrinter::VisitCXXThisExpr(CXXThisExpr *Node) {
1014  OS << "this";
1015}
1016
1017void StmtPrinter::VisitCXXThrowExpr(CXXThrowExpr *Node) {
1018  if (Node->getSubExpr() == 0)
1019    OS << "throw";
1020  else {
1021    OS << "throw ";
1022    PrintExpr(Node->getSubExpr());
1023  }
1024}
1025
1026void StmtPrinter::VisitCXXDefaultArgExpr(CXXDefaultArgExpr *Node) {
1027  // Nothing to print: we picked up the default argument
1028}
1029
1030void StmtPrinter::VisitCXXFunctionalCastExpr(CXXFunctionalCastExpr *Node) {
1031  OS << Node->getType().getAsString();
1032  OS << "(";
1033  PrintExpr(Node->getSubExpr());
1034  OS << ")";
1035}
1036
1037void StmtPrinter::VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *Node) {
1038  PrintExpr(Node->getSubExpr());
1039}
1040
1041void StmtPrinter::VisitCXXTemporaryObjectExpr(CXXTemporaryObjectExpr *Node) {
1042  OS << Node->getType().getAsString();
1043  OS << "(";
1044  for (CXXTemporaryObjectExpr::arg_iterator Arg = Node->arg_begin(),
1045                                         ArgEnd = Node->arg_end();
1046       Arg != ArgEnd; ++Arg) {
1047    if (Arg != Node->arg_begin())
1048      OS << ", ";
1049    PrintExpr(*Arg);
1050  }
1051  OS << ")";
1052}
1053
1054void StmtPrinter::VisitCXXZeroInitValueExpr(CXXZeroInitValueExpr *Node) {
1055  OS << Node->getType().getAsString() << "()";
1056}
1057
1058void StmtPrinter::VisitCXXNewExpr(CXXNewExpr *E) {
1059  if (E->isGlobalNew())
1060    OS << "::";
1061  OS << "new ";
1062  unsigned NumPlace = E->getNumPlacementArgs();
1063  if (NumPlace > 0) {
1064    OS << "(";
1065    PrintExpr(E->getPlacementArg(0));
1066    for (unsigned i = 1; i < NumPlace; ++i) {
1067      OS << ", ";
1068      PrintExpr(E->getPlacementArg(i));
1069    }
1070    OS << ") ";
1071  }
1072  if (E->isParenTypeId())
1073    OS << "(";
1074  std::string TypeS;
1075  if (Expr *Size = E->getArraySize()) {
1076    llvm::raw_string_ostream s(TypeS);
1077    Size->printPretty(s, Context, Helper, Policy);
1078    s.flush();
1079    TypeS = "[" + TypeS + "]";
1080  }
1081  E->getAllocatedType().getAsStringInternal(TypeS, Policy);
1082  OS << TypeS;
1083  if (E->isParenTypeId())
1084    OS << ")";
1085
1086  if (E->hasInitializer()) {
1087    OS << "(";
1088    unsigned NumCons = E->getNumConstructorArgs();
1089    if (NumCons > 0) {
1090      PrintExpr(E->getConstructorArg(0));
1091      for (unsigned i = 1; i < NumCons; ++i) {
1092        OS << ", ";
1093        PrintExpr(E->getConstructorArg(i));
1094      }
1095    }
1096    OS << ")";
1097  }
1098}
1099
1100void StmtPrinter::VisitCXXDeleteExpr(CXXDeleteExpr *E) {
1101  if (E->isGlobalDelete())
1102    OS << "::";
1103  OS << "delete ";
1104  if (E->isArrayForm())
1105    OS << "[] ";
1106  PrintExpr(E->getArgument());
1107}
1108
1109void StmtPrinter::VisitCXXPseudoDestructorExpr(CXXPseudoDestructorExpr *E) {
1110  PrintExpr(E->getBase());
1111  if (E->isArrow())
1112    OS << "->";
1113  else
1114    OS << '.';
1115  if (E->getQualifier())
1116    E->getQualifier()->print(OS, Policy);
1117
1118  std::string TypeS;
1119  E->getDestroyedType().getAsStringInternal(TypeS, Policy);
1120  OS << TypeS;
1121}
1122
1123void StmtPrinter::VisitCXXConstructExpr(CXXConstructExpr *E) {
1124  // Nothing to print.
1125}
1126
1127void StmtPrinter::VisitCXXExprWithTemporaries(CXXExprWithTemporaries *E) {
1128  // Just forward to the sub expression.
1129  PrintExpr(E->getSubExpr());
1130}
1131
1132void
1133StmtPrinter::VisitCXXUnresolvedConstructExpr(
1134                                           CXXUnresolvedConstructExpr *Node) {
1135  OS << Node->getTypeAsWritten().getAsString();
1136  OS << "(";
1137  for (CXXUnresolvedConstructExpr::arg_iterator Arg = Node->arg_begin(),
1138                                             ArgEnd = Node->arg_end();
1139       Arg != ArgEnd; ++Arg) {
1140    if (Arg != Node->arg_begin())
1141      OS << ", ";
1142    PrintExpr(*Arg);
1143  }
1144  OS << ")";
1145}
1146
1147void StmtPrinter::VisitCXXDependentScopeMemberExpr(
1148                                         CXXDependentScopeMemberExpr *Node) {
1149  PrintExpr(Node->getBase());
1150  OS << (Node->isArrow() ? "->" : ".");
1151  if (NestedNameSpecifier *Qualifier = Node->getQualifier())
1152    Qualifier->print(OS, Policy);
1153  else if (Node->hasExplicitTemplateArgumentList())
1154    // FIXME: Track use of "template" keyword explicitly?
1155    OS << "template ";
1156
1157  OS << Node->getMember().getAsString();
1158
1159  if (Node->hasExplicitTemplateArgumentList()) {
1160    OS << TemplateSpecializationType::PrintTemplateArgumentList(
1161                                                    Node->getTemplateArgs(),
1162                                                    Node->getNumTemplateArgs(),
1163                                                    Policy);
1164  }
1165}
1166
1167static const char *getTypeTraitName(UnaryTypeTrait UTT) {
1168  switch (UTT) {
1169  default: assert(false && "Unknown type trait");
1170  case UTT_HasNothrowAssign:      return "__has_nothrow_assign";
1171  case UTT_HasNothrowCopy:        return "__has_nothrow_copy";
1172  case UTT_HasNothrowConstructor: return "__has_nothrow_constructor";
1173  case UTT_HasTrivialAssign:      return "__has_trivial_assign";
1174  case UTT_HasTrivialCopy:        return "__has_trivial_copy";
1175  case UTT_HasTrivialConstructor: return "__has_trivial_constructor";
1176  case UTT_HasTrivialDestructor:  return "__has_trivial_destructor";
1177  case UTT_HasVirtualDestructor:  return "__has_virtual_destructor";
1178  case UTT_IsAbstract:            return "__is_abstract";
1179  case UTT_IsClass:               return "__is_class";
1180  case UTT_IsEmpty:               return "__is_empty";
1181  case UTT_IsEnum:                return "__is_enum";
1182  case UTT_IsPOD:                 return "__is_pod";
1183  case UTT_IsPolymorphic:         return "__is_polymorphic";
1184  case UTT_IsUnion:               return "__is_union";
1185  }
1186}
1187
1188void StmtPrinter::VisitUnaryTypeTraitExpr(UnaryTypeTraitExpr *E) {
1189  OS << getTypeTraitName(E->getTrait()) << "("
1190     << E->getQueriedType().getAsString() << ")";
1191}
1192
1193// Obj-C
1194
1195void StmtPrinter::VisitObjCStringLiteral(ObjCStringLiteral *Node) {
1196  OS << "@";
1197  VisitStringLiteral(Node->getString());
1198}
1199
1200void StmtPrinter::VisitObjCEncodeExpr(ObjCEncodeExpr *Node) {
1201  OS << "@encode(" << Node->getEncodedType().getAsString() << ')';
1202}
1203
1204void StmtPrinter::VisitObjCSelectorExpr(ObjCSelectorExpr *Node) {
1205  OS << "@selector(" << Node->getSelector().getAsString() << ')';
1206}
1207
1208void StmtPrinter::VisitObjCProtocolExpr(ObjCProtocolExpr *Node) {
1209  OS << "@protocol(" << Node->getProtocol()->getNameAsString() << ')';
1210}
1211
1212void StmtPrinter::VisitObjCMessageExpr(ObjCMessageExpr *Mess) {
1213  OS << "[";
1214  Expr *receiver = Mess->getReceiver();
1215  if (receiver) PrintExpr(receiver);
1216  else OS << Mess->getClassName()->getName();
1217  OS << ' ';
1218  Selector selector = Mess->getSelector();
1219  if (selector.isUnarySelector()) {
1220    OS << selector.getIdentifierInfoForSlot(0)->getName();
1221  } else {
1222    for (unsigned i = 0, e = Mess->getNumArgs(); i != e; ++i) {
1223      if (i < selector.getNumArgs()) {
1224        if (i > 0) OS << ' ';
1225        if (selector.getIdentifierInfoForSlot(i))
1226          OS << selector.getIdentifierInfoForSlot(i)->getName() << ':';
1227        else
1228           OS << ":";
1229      }
1230      else OS << ", "; // Handle variadic methods.
1231
1232      PrintExpr(Mess->getArg(i));
1233    }
1234  }
1235  OS << "]";
1236}
1237
1238void StmtPrinter::VisitObjCSuperExpr(ObjCSuperExpr *) {
1239  OS << "super";
1240}
1241
1242void StmtPrinter::VisitBlockExpr(BlockExpr *Node) {
1243  BlockDecl *BD = Node->getBlockDecl();
1244  OS << "^";
1245
1246  const FunctionType *AFT = Node->getFunctionType();
1247
1248  if (isa<FunctionNoProtoType>(AFT)) {
1249    OS << "()";
1250  } else if (!BD->param_empty() || cast<FunctionProtoType>(AFT)->isVariadic()) {
1251    OS << '(';
1252    std::string ParamStr;
1253    for (BlockDecl::param_iterator AI = BD->param_begin(),
1254         E = BD->param_end(); AI != E; ++AI) {
1255      if (AI != BD->param_begin()) OS << ", ";
1256      ParamStr = (*AI)->getNameAsString();
1257      (*AI)->getType().getAsStringInternal(ParamStr, Policy);
1258      OS << ParamStr;
1259    }
1260
1261    const FunctionProtoType *FT = cast<FunctionProtoType>(AFT);
1262    if (FT->isVariadic()) {
1263      if (!BD->param_empty()) OS << ", ";
1264      OS << "...";
1265    }
1266    OS << ')';
1267  }
1268}
1269
1270void StmtPrinter::VisitBlockDeclRefExpr(BlockDeclRefExpr *Node) {
1271  OS << Node->getDecl()->getNameAsString();
1272}
1273//===----------------------------------------------------------------------===//
1274// Stmt method implementations
1275//===----------------------------------------------------------------------===//
1276
1277void Stmt::dumpPretty(ASTContext& Context) const {
1278  printPretty(llvm::errs(), Context, 0,
1279              PrintingPolicy(Context.getLangOptions()));
1280}
1281
1282void Stmt::printPretty(llvm::raw_ostream &OS, ASTContext& Context,
1283                       PrinterHelper* Helper,
1284                       const PrintingPolicy &Policy,
1285                       unsigned Indentation) const {
1286  if (this == 0) {
1287    OS << "<NULL>";
1288    return;
1289  }
1290
1291  if (Policy.Dump && &Context) {
1292    dump(Context.getSourceManager());
1293    return;
1294  }
1295
1296  StmtPrinter P(OS, Context, Helper, Policy, Indentation);
1297  P.Visit(const_cast<Stmt*>(this));
1298}
1299
1300//===----------------------------------------------------------------------===//
1301// PrinterHelper
1302//===----------------------------------------------------------------------===//
1303
1304// Implement virtual destructor.
1305PrinterHelper::~PrinterHelper() {}
1306