TypePrinter.cpp revision 14aa2175416f79ef17811282afbf425f87d54ebf 
1//===--- TypePrinter.cpp - Pretty-Print Clang Types -----------------------===//
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 contains code to print types from Clang's type system.
11//
12//===----------------------------------------------------------------------===//
13
14#include "clang/AST/Decl.h"
15#include "clang/AST/DeclObjC.h"
16#include "clang/AST/DeclTemplate.h"
17#include "clang/AST/Expr.h"
18#include "clang/AST/Type.h"
19#include "clang/AST/PrettyPrinter.h"
20#include "clang/Basic/LangOptions.h"
21#include "clang/Basic/SourceManager.h"
22#include "llvm/ADT/StringExtras.h"
23#include "llvm/Support/raw_ostream.h"
24using namespace clang;
25
26namespace {
27  class TypePrinter {
28    PrintingPolicy Policy;
29
30  public:
31    explicit TypePrinter(const PrintingPolicy &Policy) : Policy(Policy) { }
32
33    void print(const Type *ty, Qualifiers qs, std::string &buffer);
34    void print(QualType T, std::string &S);
35    void AppendScope(DeclContext *DC, std::string &S);
36    void printTag(TagDecl *T, std::string &S);
37#define ABSTRACT_TYPE(CLASS, PARENT)
38#define TYPE(CLASS, PARENT) \
39    void print##CLASS(const CLASS##Type *T, std::string &S);
40#include "clang/AST/TypeNodes.def"
41  };
42}
43
44static void AppendTypeQualList(std::string &S, unsigned TypeQuals) {
45  if (TypeQuals & Qualifiers::Const) {
46    if (!S.empty()) S += ' ';
47    S += "const";
48  }
49  if (TypeQuals & Qualifiers::Volatile) {
50    if (!S.empty()) S += ' ';
51    S += "volatile";
52  }
53  if (TypeQuals & Qualifiers::Restrict) {
54    if (!S.empty()) S += ' ';
55    S += "restrict";
56  }
57}
58
59void TypePrinter::print(QualType t, std::string &buffer) {
60  SplitQualType split = t.split();
61  print(split.first, split.second, buffer);
62}
63
64void TypePrinter::print(const Type *T, Qualifiers Quals, std::string &buffer) {
65  if (!T) {
66    buffer += "NULL TYPE";
67    return;
68  }
69
70  if (Policy.SuppressSpecifiers && T->isSpecifierType())
71    return;
72
73  // Print qualifiers as appropriate.
74
75  // CanPrefixQualifiers - We prefer to print type qualifiers before the type,
76  // so that we get "const int" instead of "int const", but we can't do this if
77  // the type is complex.  For example if the type is "int*", we *must* print
78  // "int * const", printing "const int *" is different.  Only do this when the
79  // type expands to a simple string.
80  bool CanPrefixQualifiers = false;
81
82  Type::TypeClass TC = T->getTypeClass();
83  if (const AutoType *AT = dyn_cast<AutoType>(T))
84    TC = AT->desugar()->getTypeClass();
85  if (const SubstTemplateTypeParmType *Subst
86                                      = dyn_cast<SubstTemplateTypeParmType>(T))
87    TC = Subst->getReplacementType()->getTypeClass();
88
89  switch (TC) {
90    case Type::Builtin:
91    case Type::Complex:
92    case Type::UnresolvedUsing:
93    case Type::Typedef:
94    case Type::TypeOfExpr:
95    case Type::TypeOf:
96    case Type::Decltype:
97    case Type::Record:
98    case Type::Enum:
99    case Type::Elaborated:
100    case Type::TemplateTypeParm:
101    case Type::SubstTemplateTypeParmPack:
102    case Type::TemplateSpecialization:
103    case Type::InjectedClassName:
104    case Type::DependentName:
105    case Type::DependentTemplateSpecialization:
106    case Type::ObjCObject:
107    case Type::ObjCInterface:
108      CanPrefixQualifiers = true;
109      break;
110
111    case Type::ObjCObjectPointer:
112      CanPrefixQualifiers = T->isObjCIdType() || T->isObjCClassType() ||
113        T->isObjCQualifiedIdType() || T->isObjCQualifiedClassType();
114      break;
115
116    case Type::Pointer:
117    case Type::BlockPointer:
118    case Type::LValueReference:
119    case Type::RValueReference:
120    case Type::MemberPointer:
121    case Type::ConstantArray:
122    case Type::IncompleteArray:
123    case Type::VariableArray:
124    case Type::DependentSizedArray:
125    case Type::DependentSizedExtVector:
126    case Type::Vector:
127    case Type::ExtVector:
128    case Type::FunctionProto:
129    case Type::FunctionNoProto:
130    case Type::Paren:
131    case Type::Attributed:
132    case Type::PackExpansion:
133    case Type::SubstTemplateTypeParm:
134    case Type::Auto:
135      CanPrefixQualifiers = false;
136      break;
137  }
138
139  if (!CanPrefixQualifiers && !Quals.empty()) {
140    std::string qualsBuffer;
141    Quals.getAsStringInternal(qualsBuffer, Policy);
142
143    if (!buffer.empty()) {
144      qualsBuffer += ' ';
145      qualsBuffer += buffer;
146    }
147    std::swap(buffer, qualsBuffer);
148  }
149
150  switch (T->getTypeClass()) {
151#define ABSTRACT_TYPE(CLASS, PARENT)
152#define TYPE(CLASS, PARENT) case Type::CLASS: \
153    print##CLASS(cast<CLASS##Type>(T), buffer); \
154    break;
155#include "clang/AST/TypeNodes.def"
156  }
157
158  // If we're adding the qualifiers as a prefix, do it now.
159  if (CanPrefixQualifiers && !Quals.empty()) {
160    std::string qualsBuffer;
161    Quals.getAsStringInternal(qualsBuffer, Policy);
162
163    if (!buffer.empty()) {
164      qualsBuffer += ' ';
165      qualsBuffer += buffer;
166    }
167    std::swap(buffer, qualsBuffer);
168  }
169}
170
171void TypePrinter::printBuiltin(const BuiltinType *T, std::string &S) {
172  if (S.empty()) {
173    S = T->getName(Policy.LangOpts);
174  } else {
175    // Prefix the basic type, e.g. 'int X'.
176    S = ' ' + S;
177    S = T->getName(Policy.LangOpts) + S;
178  }
179}
180
181void TypePrinter::printComplex(const ComplexType *T, std::string &S) {
182  print(T->getElementType(), S);
183  S = "_Complex " + S;
184}
185
186void TypePrinter::printPointer(const PointerType *T, std::string &S) {
187  S = '*' + S;
188
189  // Handle things like 'int (*A)[4];' correctly.
190  // FIXME: this should include vectors, but vectors use attributes I guess.
191  if (isa<ArrayType>(T->getPointeeType()))
192    S = '(' + S + ')';
193
194  print(T->getPointeeType(), S);
195}
196
197void TypePrinter::printBlockPointer(const BlockPointerType *T, std::string &S) {
198  S = '^' + S;
199  print(T->getPointeeType(), S);
200}
201
202void TypePrinter::printLValueReference(const LValueReferenceType *T,
203                                       std::string &S) {
204  S = '&' + S;
205
206  // Handle things like 'int (&A)[4];' correctly.
207  // FIXME: this should include vectors, but vectors use attributes I guess.
208  if (isa<ArrayType>(T->getPointeeTypeAsWritten()))
209    S = '(' + S + ')';
210
211  print(T->getPointeeTypeAsWritten(), S);
212}
213
214void TypePrinter::printRValueReference(const RValueReferenceType *T,
215                                       std::string &S) {
216  S = "&&" + S;
217
218  // Handle things like 'int (&&A)[4];' correctly.
219  // FIXME: this should include vectors, but vectors use attributes I guess.
220  if (isa<ArrayType>(T->getPointeeTypeAsWritten()))
221    S = '(' + S + ')';
222
223  print(T->getPointeeTypeAsWritten(), S);
224}
225
226void TypePrinter::printMemberPointer(const MemberPointerType *T,
227                                     std::string &S) {
228  std::string C;
229  print(QualType(T->getClass(), 0), C);
230  C += "::*";
231  S = C + S;
232
233  // Handle things like 'int (Cls::*A)[4];' correctly.
234  // FIXME: this should include vectors, but vectors use attributes I guess.
235  if (isa<ArrayType>(T->getPointeeType()))
236    S = '(' + S + ')';
237
238  print(T->getPointeeType(), S);
239}
240
241void TypePrinter::printConstantArray(const ConstantArrayType *T,
242                                     std::string &S) {
243  S += '[';
244  S += llvm::utostr(T->getSize().getZExtValue());
245  S += ']';
246
247  print(T->getElementType(), S);
248}
249
250void TypePrinter::printIncompleteArray(const IncompleteArrayType *T,
251                                       std::string &S) {
252  S += "[]";
253  print(T->getElementType(), S);
254}
255
256void TypePrinter::printVariableArray(const VariableArrayType *T,
257                                     std::string &S) {
258  S += '[';
259
260  if (T->getIndexTypeQualifiers().hasQualifiers()) {
261    AppendTypeQualList(S, T->getIndexTypeCVRQualifiers());
262    S += ' ';
263  }
264
265  if (T->getSizeModifier() == VariableArrayType::Static)
266    S += "static";
267  else if (T->getSizeModifier() == VariableArrayType::Star)
268    S += '*';
269
270  if (T->getSizeExpr()) {
271    std::string SStr;
272    llvm::raw_string_ostream s(SStr);
273    T->getSizeExpr()->printPretty(s, 0, Policy);
274    S += s.str();
275  }
276  S += ']';
277
278  print(T->getElementType(), S);
279}
280
281void TypePrinter::printDependentSizedArray(const DependentSizedArrayType *T,
282                                           std::string &S) {
283  S += '[';
284
285  if (T->getSizeExpr()) {
286    std::string SStr;
287    llvm::raw_string_ostream s(SStr);
288    T->getSizeExpr()->printPretty(s, 0, Policy);
289    S += s.str();
290  }
291  S += ']';
292
293  print(T->getElementType(), S);
294}
295
296void TypePrinter::printDependentSizedExtVector(
297                                          const DependentSizedExtVectorType *T,
298                                               std::string &S) {
299  print(T->getElementType(), S);
300
301  S += " __attribute__((ext_vector_type(";
302  if (T->getSizeExpr()) {
303    std::string SStr;
304    llvm::raw_string_ostream s(SStr);
305    T->getSizeExpr()->printPretty(s, 0, Policy);
306    S += s.str();
307  }
308  S += ")))";
309}
310
311void TypePrinter::printVector(const VectorType *T, std::string &S) {
312  switch (T->getVectorKind()) {
313  case VectorType::AltiVecPixel:
314    S = "__vector __pixel " + S;
315    break;
316  case VectorType::AltiVecBool:
317    print(T->getElementType(), S);
318    S = "__vector __bool " + S;
319    break;
320  case VectorType::AltiVecVector:
321    print(T->getElementType(), S);
322    S = "__vector " + S;
323    break;
324  case VectorType::NeonVector:
325    print(T->getElementType(), S);
326    S = ("__attribute__((neon_vector_type(" +
327         llvm::utostr_32(T->getNumElements()) + "))) " + S);
328    break;
329  case VectorType::NeonPolyVector:
330    print(T->getElementType(), S);
331    S = ("__attribute__((neon_polyvector_type(" +
332         llvm::utostr_32(T->getNumElements()) + "))) " + S);
333    break;
334  case VectorType::GenericVector: {
335    // FIXME: We prefer to print the size directly here, but have no way
336    // to get the size of the type.
337    print(T->getElementType(), S);
338    std::string V = "__attribute__((__vector_size__(";
339    V += llvm::utostr_32(T->getNumElements()); // convert back to bytes.
340    std::string ET;
341    print(T->getElementType(), ET);
342    V += " * sizeof(" + ET + ")))) ";
343    S = V + S;
344    break;
345  }
346  }
347}
348
349void TypePrinter::printExtVector(const ExtVectorType *T, std::string &S) {
350  S += " __attribute__((ext_vector_type(";
351  S += llvm::utostr_32(T->getNumElements());
352  S += ")))";
353  print(T->getElementType(), S);
354}
355
356void TypePrinter::printFunctionProto(const FunctionProtoType *T,
357                                     std::string &S) {
358  // If needed for precedence reasons, wrap the inner part in grouping parens.
359  if (!S.empty())
360    S = "(" + S + ")";
361
362  S += "(";
363  std::string Tmp;
364  PrintingPolicy ParamPolicy(Policy);
365  ParamPolicy.SuppressSpecifiers = false;
366  for (unsigned i = 0, e = T->getNumArgs(); i != e; ++i) {
367    if (i) S += ", ";
368    print(T->getArgType(i), Tmp);
369    S += Tmp;
370    Tmp.clear();
371  }
372
373  if (T->isVariadic()) {
374    if (T->getNumArgs())
375      S += ", ";
376    S += "...";
377  } else if (T->getNumArgs() == 0 && !Policy.LangOpts.CPlusPlus) {
378    // Do not emit int() if we have a proto, emit 'int(void)'.
379    S += "void";
380  }
381
382  S += ")";
383
384  FunctionType::ExtInfo Info = T->getExtInfo();
385  switch(Info.getCC()) {
386  case CC_Default:
387  default: break;
388  case CC_C:
389    S += " __attribute__((cdecl))";
390    break;
391  case CC_X86StdCall:
392    S += " __attribute__((stdcall))";
393    break;
394  case CC_X86FastCall:
395    S += " __attribute__((fastcall))";
396    break;
397  case CC_X86ThisCall:
398    S += " __attribute__((thiscall))";
399    break;
400  case CC_X86Pascal:
401    S += " __attribute__((pascal))";
402    break;
403  }
404  if (Info.getNoReturn())
405    S += " __attribute__((noreturn))";
406  if (Info.getRegParm())
407    S += " __attribute__((regparm (" +
408        llvm::utostr_32(Info.getRegParm()) + ")))";
409
410  AppendTypeQualList(S, T->getTypeQuals());
411
412  switch (T->getRefQualifier()) {
413  case RQ_None:
414    break;
415
416  case RQ_LValue:
417    S += " &";
418    break;
419
420  case RQ_RValue:
421    S += " &&";
422    break;
423  }
424
425  if (T->hasExceptionSpec()) {
426    S += " throw(";
427    if (T->hasAnyExceptionSpec())
428      S += "...";
429    else
430      for (unsigned I = 0, N = T->getNumExceptions(); I != N; ++I) {
431        if (I)
432          S += ", ";
433
434        std::string ExceptionType;
435        print(T->getExceptionType(I), ExceptionType);
436        S += ExceptionType;
437      }
438    S += ")";
439  }
440
441  print(T->getResultType(), S);
442}
443
444void TypePrinter::printFunctionNoProto(const FunctionNoProtoType *T,
445                                       std::string &S) {
446  // If needed for precedence reasons, wrap the inner part in grouping parens.
447  if (!S.empty())
448    S = "(" + S + ")";
449
450  S += "()";
451  if (T->getNoReturnAttr())
452    S += " __attribute__((noreturn))";
453  print(T->getResultType(), S);
454}
455
456static void printTypeSpec(const NamedDecl *D, std::string &S) {
457  IdentifierInfo *II = D->getIdentifier();
458  if (S.empty())
459    S = II->getName().str();
460  else
461    S = II->getName().str() + ' ' + S;
462}
463
464void TypePrinter::printUnresolvedUsing(const UnresolvedUsingType *T,
465                                       std::string &S) {
466  printTypeSpec(T->getDecl(), S);
467}
468
469void TypePrinter::printTypedef(const TypedefType *T, std::string &S) {
470  printTypeSpec(T->getDecl(), S);
471}
472
473void TypePrinter::printTypeOfExpr(const TypeOfExprType *T, std::string &S) {
474  if (!S.empty())    // Prefix the basic type, e.g. 'typeof(e) X'.
475    S = ' ' + S;
476  std::string Str;
477  llvm::raw_string_ostream s(Str);
478  T->getUnderlyingExpr()->printPretty(s, 0, Policy);
479  S = "typeof " + s.str() + S;
480}
481
482void TypePrinter::printTypeOf(const TypeOfType *T, std::string &S) {
483  if (!S.empty())    // Prefix the basic type, e.g. 'typeof(t) X'.
484    S = ' ' + S;
485  std::string Tmp;
486  print(T->getUnderlyingType(), Tmp);
487  S = "typeof(" + Tmp + ")" + S;
488}
489
490void TypePrinter::printDecltype(const DecltypeType *T, std::string &S) {
491  if (!S.empty())    // Prefix the basic type, e.g. 'decltype(t) X'.
492    S = ' ' + S;
493  std::string Str;
494  llvm::raw_string_ostream s(Str);
495  T->getUnderlyingExpr()->printPretty(s, 0, Policy);
496  S = "decltype(" + s.str() + ")" + S;
497}
498
499void TypePrinter::printAuto(const AutoType *T, std::string &S) {
500  // If the type has been deduced, do not print 'auto'.
501  if (T->isDeduced()) {
502    print(T->getDeducedType(), S);
503  } else {
504    if (!S.empty())    // Prefix the basic type, e.g. 'auto X'.
505      S = ' ' + S;
506    S = "auto" + S;
507  }
508}
509
510/// Appends the given scope to the end of a string.
511void TypePrinter::AppendScope(DeclContext *DC, std::string &Buffer) {
512  if (DC->isTranslationUnit()) return;
513  AppendScope(DC->getParent(), Buffer);
514
515  unsigned OldSize = Buffer.size();
516
517  if (NamespaceDecl *NS = dyn_cast<NamespaceDecl>(DC)) {
518    if (NS->getIdentifier())
519      Buffer += NS->getNameAsString();
520    else
521      Buffer += "<anonymous>";
522  } else if (ClassTemplateSpecializationDecl *Spec
523               = dyn_cast<ClassTemplateSpecializationDecl>(DC)) {
524    const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs();
525    std::string TemplateArgsStr
526      = TemplateSpecializationType::PrintTemplateArgumentList(
527                                            TemplateArgs.data(),
528                                            TemplateArgs.size(),
529                                            Policy);
530    Buffer += Spec->getIdentifier()->getName();
531    Buffer += TemplateArgsStr;
532  } else if (TagDecl *Tag = dyn_cast<TagDecl>(DC)) {
533    if (TypedefDecl *Typedef = Tag->getTypedefForAnonDecl())
534      Buffer += Typedef->getIdentifier()->getName();
535    else if (Tag->getIdentifier())
536      Buffer += Tag->getIdentifier()->getName();
537  }
538
539  if (Buffer.size() != OldSize)
540    Buffer += "::";
541}
542
543void TypePrinter::printTag(TagDecl *D, std::string &InnerString) {
544  if (Policy.SuppressTag)
545    return;
546
547  std::string Buffer;
548  bool HasKindDecoration = false;
549
550  // We don't print tags unless this is an elaborated type.
551  // In C, we just assume every RecordType is an elaborated type.
552  if (!Policy.LangOpts.CPlusPlus && !D->getTypedefForAnonDecl()) {
553    HasKindDecoration = true;
554    Buffer += D->getKindName();
555    Buffer += ' ';
556  }
557
558  // Compute the full nested-name-specifier for this type.
559  // In C, this will always be empty except when the type
560  // being printed is anonymous within other Record.
561  if (!Policy.SuppressScope)
562    AppendScope(D->getDeclContext(), Buffer);
563
564  if (const IdentifierInfo *II = D->getIdentifier())
565    Buffer += II->getNameStart();
566  else if (TypedefDecl *Typedef = D->getTypedefForAnonDecl()) {
567    assert(Typedef->getIdentifier() && "Typedef without identifier?");
568    Buffer += Typedef->getIdentifier()->getNameStart();
569  } else {
570    // Make an unambiguous representation for anonymous types, e.g.
571    //   <anonymous enum at /usr/include/string.h:120:9>
572    llvm::raw_string_ostream OS(Buffer);
573    OS << "<anonymous";
574
575    if (Policy.AnonymousTagLocations) {
576      // Suppress the redundant tag keyword if we just printed one.
577      // We don't have to worry about ElaboratedTypes here because you can't
578      // refer to an anonymous type with one.
579      if (!HasKindDecoration)
580        OS << " " << D->getKindName();
581
582      PresumedLoc PLoc = D->getASTContext().getSourceManager().getPresumedLoc(
583          D->getLocation());
584      if (PLoc.isValid()) {
585        OS << " at " << PLoc.getFilename()
586           << ':' << PLoc.getLine()
587           << ':' << PLoc.getColumn();
588      }
589    }
590
591    OS << '>';
592  }
593
594  // If this is a class template specialization, print the template
595  // arguments.
596  if (ClassTemplateSpecializationDecl *Spec
597        = dyn_cast<ClassTemplateSpecializationDecl>(D)) {
598    const TemplateArgument *Args;
599    unsigned NumArgs;
600    if (TypeSourceInfo *TAW = Spec->getTypeAsWritten()) {
601      const TemplateSpecializationType *TST =
602        cast<TemplateSpecializationType>(TAW->getType());
603      Args = TST->getArgs();
604      NumArgs = TST->getNumArgs();
605    } else {
606      const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs();
607      Args = TemplateArgs.data();
608      NumArgs = TemplateArgs.size();
609    }
610    Buffer += TemplateSpecializationType::PrintTemplateArgumentList(Args,
611                                                                    NumArgs,
612                                                                    Policy);
613  }
614
615  if (!InnerString.empty()) {
616    Buffer += ' ';
617    Buffer += InnerString;
618  }
619
620  std::swap(Buffer, InnerString);
621}
622
623void TypePrinter::printRecord(const RecordType *T, std::string &S) {
624  printTag(T->getDecl(), S);
625}
626
627void TypePrinter::printEnum(const EnumType *T, std::string &S) {
628  printTag(T->getDecl(), S);
629}
630
631void TypePrinter::printTemplateTypeParm(const TemplateTypeParmType *T,
632                                        std::string &S) {
633  if (!S.empty())    // Prefix the basic type, e.g. 'parmname X'.
634    S = ' ' + S;
635
636  if (!T->getName())
637    S = "type-parameter-" + llvm::utostr_32(T->getDepth()) + '-' +
638        llvm::utostr_32(T->getIndex()) + S;
639  else
640    S = T->getName()->getName().str() + S;
641}
642
643void TypePrinter::printSubstTemplateTypeParm(const SubstTemplateTypeParmType *T,
644                                             std::string &S) {
645  print(T->getReplacementType(), S);
646}
647
648void TypePrinter::printSubstTemplateTypeParmPack(
649                                        const SubstTemplateTypeParmPackType *T,
650                                             std::string &S) {
651  printTemplateTypeParm(T->getReplacedParameter(), S);
652}
653
654void TypePrinter::printTemplateSpecialization(
655                                            const TemplateSpecializationType *T,
656                                              std::string &S) {
657  std::string SpecString;
658
659  {
660    llvm::raw_string_ostream OS(SpecString);
661    T->getTemplateName().print(OS, Policy);
662  }
663
664  SpecString += TemplateSpecializationType::PrintTemplateArgumentList(
665                                                                  T->getArgs(),
666                                                                T->getNumArgs(),
667                                                                      Policy);
668  if (S.empty())
669    S.swap(SpecString);
670  else
671    S = SpecString + ' ' + S;
672}
673
674void TypePrinter::printInjectedClassName(const InjectedClassNameType *T,
675                                         std::string &S) {
676  printTemplateSpecialization(T->getInjectedTST(), S);
677}
678
679void TypePrinter::printElaborated(const ElaboratedType *T, std::string &S) {
680  std::string MyString;
681
682  {
683    llvm::raw_string_ostream OS(MyString);
684    OS << TypeWithKeyword::getKeywordName(T->getKeyword());
685    if (T->getKeyword() != ETK_None)
686      OS << " ";
687    NestedNameSpecifier* Qualifier = T->getQualifier();
688    if (Qualifier)
689      Qualifier->print(OS, Policy);
690  }
691
692  std::string TypeStr;
693  PrintingPolicy InnerPolicy(Policy);
694  InnerPolicy.SuppressScope = true;
695  TypePrinter(InnerPolicy).print(T->getNamedType(), TypeStr);
696
697  MyString += TypeStr;
698  if (S.empty())
699    S.swap(MyString);
700  else
701    S = MyString + ' ' + S;
702}
703
704void TypePrinter::printParen(const ParenType *T, std::string &S) {
705  if (!S.empty() && !isa<FunctionType>(T->getInnerType()))
706    S = '(' + S + ')';
707  print(T->getInnerType(), S);
708}
709
710void TypePrinter::printDependentName(const DependentNameType *T, std::string &S) {
711  std::string MyString;
712
713  {
714    llvm::raw_string_ostream OS(MyString);
715    OS << TypeWithKeyword::getKeywordName(T->getKeyword());
716    if (T->getKeyword() != ETK_None)
717      OS << " ";
718
719    T->getQualifier()->print(OS, Policy);
720
721    OS << T->getIdentifier()->getName();
722  }
723
724  if (S.empty())
725    S.swap(MyString);
726  else
727    S = MyString + ' ' + S;
728}
729
730void TypePrinter::printDependentTemplateSpecialization(
731        const DependentTemplateSpecializationType *T, std::string &S) {
732  std::string MyString;
733  {
734    llvm::raw_string_ostream OS(MyString);
735
736    OS << TypeWithKeyword::getKeywordName(T->getKeyword());
737    if (T->getKeyword() != ETK_None)
738      OS << " ";
739
740    if (T->getQualifier())
741      T->getQualifier()->print(OS, Policy);
742    OS << T->getIdentifier()->getName();
743    OS << TemplateSpecializationType::PrintTemplateArgumentList(
744                                                            T->getArgs(),
745                                                            T->getNumArgs(),
746                                                            Policy);
747  }
748
749  if (S.empty())
750    S.swap(MyString);
751  else
752    S = MyString + ' ' + S;
753}
754
755void TypePrinter::printPackExpansion(const PackExpansionType *T,
756                                     std::string &S) {
757  print(T->getPattern(), S);
758  S += "...";
759}
760
761void TypePrinter::printAttributed(const AttributedType *T,
762                                  std::string &S) {
763  // Prefer the macro forms of the GC qualifiers.
764  if (T->getAttrKind() == AttributedType::attr_objc_gc)
765    return print(T->getEquivalentType(), S);
766
767  print(T->getModifiedType(), S);
768
769  // TODO: not all attributes are GCC-style attributes.
770  S += " __attribute__((";
771  switch (T->getAttrKind()) {
772  case AttributedType::attr_address_space:
773    S += "address_space(";
774    S += T->getEquivalentType().getAddressSpace();
775    S += ")";
776    break;
777
778  case AttributedType::attr_vector_size: {
779    S += "__vector_size__(";
780    if (const VectorType *vector =T->getEquivalentType()->getAs<VectorType>()) {
781      S += vector->getNumElements();
782      S += " * sizeof(";
783
784      std::string tmp;
785      print(vector->getElementType(), tmp);
786      S += tmp;
787      S += ")";
788    }
789    S += ")";
790    break;
791  }
792
793  case AttributedType::attr_neon_vector_type:
794  case AttributedType::attr_neon_polyvector_type: {
795    if (T->getAttrKind() == AttributedType::attr_neon_vector_type)
796      S += "neon_vector_type(";
797    else
798      S += "neon_polyvector_type(";
799    const VectorType *vector = T->getEquivalentType()->getAs<VectorType>();
800    S += llvm::utostr_32(vector->getNumElements());
801    S += ")";
802    break;
803  }
804
805  case AttributedType::attr_regparm: {
806    S += "regparm(";
807    QualType t = T->getEquivalentType();
808    while (!t->isFunctionType())
809      t = t->getPointeeType();
810    S += t->getAs<FunctionType>()->getRegParmType();
811    S += ")";
812    break;
813  }
814
815  case AttributedType::attr_objc_gc: {
816    S += "objc_gc(";
817
818    QualType tmp = T->getEquivalentType();
819    while (tmp.getObjCGCAttr() == Qualifiers::GCNone) {
820      QualType next = tmp->getPointeeType();
821      if (next == tmp) break;
822      tmp = next;
823    }
824
825    if (tmp.isObjCGCWeak())
826      S += "weak";
827    else
828      S += "strong";
829    S += ")";
830    break;
831  }
832
833  case AttributedType::attr_noreturn: S += "noreturn"; break;
834  case AttributedType::attr_cdecl: S += "cdecl"; break;
835  case AttributedType::attr_fastcall: S += "fastcall"; break;
836  case AttributedType::attr_stdcall: S += "stdcall"; break;
837  case AttributedType::attr_thiscall: S += "thiscall"; break;
838  case AttributedType::attr_pascal: S += "pascal"; break;
839  }
840  S += "))";
841}
842
843void TypePrinter::printObjCInterface(const ObjCInterfaceType *T,
844                                     std::string &S) {
845  if (!S.empty())    // Prefix the basic type, e.g. 'typedefname X'.
846    S = ' ' + S;
847
848  std::string ObjCQIString = T->getDecl()->getNameAsString();
849  S = ObjCQIString + S;
850}
851
852void TypePrinter::printObjCObject(const ObjCObjectType *T,
853                                  std::string &S) {
854  if (T->qual_empty())
855    return print(T->getBaseType(), S);
856
857  std::string tmp;
858  print(T->getBaseType(), tmp);
859  tmp += '<';
860  bool isFirst = true;
861  for (ObjCObjectType::qual_iterator
862         I = T->qual_begin(), E = T->qual_end(); I != E; ++I) {
863    if (isFirst)
864      isFirst = false;
865    else
866      tmp += ',';
867    tmp += (*I)->getNameAsString();
868  }
869  tmp += '>';
870
871  if (!S.empty()) {
872    tmp += ' ';
873    tmp += S;
874  }
875  std::swap(tmp, S);
876}
877
878void TypePrinter::printObjCObjectPointer(const ObjCObjectPointerType *T,
879                                         std::string &S) {
880  std::string ObjCQIString;
881
882  T->getPointeeType().getLocalQualifiers().getAsStringInternal(ObjCQIString,
883                                                               Policy);
884  if (!ObjCQIString.empty())
885    ObjCQIString += ' ';
886
887  if (T->isObjCIdType() || T->isObjCQualifiedIdType())
888    ObjCQIString += "id";
889  else if (T->isObjCClassType() || T->isObjCQualifiedClassType())
890    ObjCQIString += "Class";
891  else if (T->isObjCSelType())
892    ObjCQIString += "SEL";
893  else
894    ObjCQIString += T->getInterfaceDecl()->getNameAsString();
895
896  if (!T->qual_empty()) {
897    ObjCQIString += '<';
898    for (ObjCObjectPointerType::qual_iterator I = T->qual_begin(),
899                                              E = T->qual_end();
900         I != E; ++I) {
901      ObjCQIString += (*I)->getNameAsString();
902      if (I+1 != E)
903        ObjCQIString += ',';
904    }
905    ObjCQIString += '>';
906  }
907
908  if (!T->isObjCIdType() && !T->isObjCQualifiedIdType())
909    ObjCQIString += " *"; // Don't forget the implicit pointer.
910  else if (!S.empty()) // Prefix the basic type, e.g. 'typedefname X'.
911    S = ' ' + S;
912
913  S = ObjCQIString + S;
914}
915
916std::string TemplateSpecializationType::
917  PrintTemplateArgumentList(const TemplateArgumentListInfo &Args,
918                            const PrintingPolicy &Policy) {
919  return PrintTemplateArgumentList(Args.getArgumentArray(),
920                                   Args.size(),
921                                   Policy);
922}
923
924std::string
925TemplateSpecializationType::PrintTemplateArgumentList(
926                                                const TemplateArgument *Args,
927                                                unsigned NumArgs,
928                                                  const PrintingPolicy &Policy,
929                                                      bool SkipBrackets) {
930  std::string SpecString;
931  if (!SkipBrackets)
932    SpecString += '<';
933
934  for (unsigned Arg = 0; Arg < NumArgs; ++Arg) {
935    if (SpecString.size() > !SkipBrackets)
936      SpecString += ", ";
937
938    // Print the argument into a string.
939    std::string ArgString;
940    if (Args[Arg].getKind() == TemplateArgument::Pack) {
941      ArgString = PrintTemplateArgumentList(Args[Arg].pack_begin(),
942                                            Args[Arg].pack_size(),
943                                            Policy, true);
944    } else {
945      llvm::raw_string_ostream ArgOut(ArgString);
946      Args[Arg].print(Policy, ArgOut);
947    }
948
949    // If this is the first argument and its string representation
950    // begins with the global scope specifier ('::foo'), add a space
951    // to avoid printing the diagraph '<:'.
952    if (!Arg && !ArgString.empty() && ArgString[0] == ':')
953      SpecString += ' ';
954
955    SpecString += ArgString;
956  }
957
958  // If the last character of our string is '>', add another space to
959  // keep the two '>''s separate tokens. We don't *have* to do this in
960  // C++0x, but it's still good hygiene.
961  if (!SpecString.empty() && SpecString[SpecString.size() - 1] == '>')
962    SpecString += ' ';
963
964  if (!SkipBrackets)
965    SpecString += '>';
966
967  return SpecString;
968}
969
970// Sadly, repeat all that with TemplateArgLoc.
971std::string TemplateSpecializationType::
972PrintTemplateArgumentList(const TemplateArgumentLoc *Args, unsigned NumArgs,
973                          const PrintingPolicy &Policy) {
974  std::string SpecString;
975  SpecString += '<';
976  for (unsigned Arg = 0; Arg < NumArgs; ++Arg) {
977    if (SpecString.size() > 1)
978      SpecString += ", ";
979
980    // Print the argument into a string.
981    std::string ArgString;
982    if (Args[Arg].getArgument().getKind() == TemplateArgument::Pack) {
983      ArgString = PrintTemplateArgumentList(
984                                           Args[Arg].getArgument().pack_begin(),
985                                            Args[Arg].getArgument().pack_size(),
986                                            Policy, true);
987    } else {
988      llvm::raw_string_ostream ArgOut(ArgString);
989      Args[Arg].getArgument().print(Policy, ArgOut);
990    }
991
992    // If this is the first argument and its string representation
993    // begins with the global scope specifier ('::foo'), add a space
994    // to avoid printing the diagraph '<:'.
995    if (!Arg && !ArgString.empty() && ArgString[0] == ':')
996      SpecString += ' ';
997
998    SpecString += ArgString;
999  }
1000
1001  // If the last character of our string is '>', add another space to
1002  // keep the two '>''s separate tokens. We don't *have* to do this in
1003  // C++0x, but it's still good hygiene.
1004  if (SpecString[SpecString.size() - 1] == '>')
1005    SpecString += ' ';
1006
1007  SpecString += '>';
1008
1009  return SpecString;
1010}
1011
1012void QualType::dump(const char *msg) const {
1013  std::string R = "identifier";
1014  LangOptions LO;
1015  getAsStringInternal(R, PrintingPolicy(LO));
1016  if (msg)
1017    llvm::errs() << msg << ": ";
1018  llvm::errs() << R << "\n";
1019}
1020void QualType::dump() const {
1021  dump("");
1022}
1023
1024void Type::dump() const {
1025  QualType(this, 0).dump();
1026}
1027
1028std::string Qualifiers::getAsString() const {
1029  LangOptions LO;
1030  return getAsString(PrintingPolicy(LO));
1031}
1032
1033// Appends qualifiers to the given string, separated by spaces.  Will
1034// prefix a space if the string is non-empty.  Will not append a final
1035// space.
1036void Qualifiers::getAsStringInternal(std::string &S,
1037                                     const PrintingPolicy&) const {
1038  AppendTypeQualList(S, getCVRQualifiers());
1039  if (unsigned addrspace = getAddressSpace()) {
1040    if (!S.empty()) S += ' ';
1041    S += "__attribute__((address_space(";
1042    S += llvm::utostr_32(addrspace);
1043    S += ")))";
1044  }
1045  if (Qualifiers::GC gc = getObjCGCAttr()) {
1046    if (!S.empty()) S += ' ';
1047    if (gc == Qualifiers::Weak)
1048      S += "__weak";
1049    else
1050      S += "__strong";
1051  }
1052}
1053
1054std::string QualType::getAsString(const Type *ty, Qualifiers qs) {
1055  std::string buffer;
1056  LangOptions options;
1057  getAsStringInternal(ty, qs, buffer, PrintingPolicy(options));
1058  return buffer;
1059}
1060
1061void QualType::getAsStringInternal(const Type *ty, Qualifiers qs,
1062                                   std::string &buffer,
1063                                   const PrintingPolicy &policy) {
1064  TypePrinter(policy).print(ty, qs, buffer);
1065}
1066