clang  5.0.0svn
SemaObjCProperty.cpp
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1 //===--- SemaObjCProperty.cpp - Semantic Analysis for ObjC @property ------===//
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 semantic analysis for Objective C @property and
11 // @synthesize declarations.
12 //
13 //===----------------------------------------------------------------------===//
14 
17 #include "clang/AST/DeclObjC.h"
18 #include "clang/AST/ExprCXX.h"
19 #include "clang/AST/ExprObjC.h"
21 #include "clang/Lex/Lexer.h"
22 #include "clang/Lex/Preprocessor.h"
24 #include "llvm/ADT/DenseSet.h"
25 #include "llvm/ADT/SmallString.h"
26 
27 using namespace clang;
28 
29 //===----------------------------------------------------------------------===//
30 // Grammar actions.
31 //===----------------------------------------------------------------------===//
32 
33 /// getImpliedARCOwnership - Given a set of property attributes and a
34 /// type, infer an expected lifetime. The type's ownership qualification
35 /// is not considered.
36 ///
37 /// Returns OCL_None if the attributes as stated do not imply an ownership.
38 /// Never returns OCL_Autoreleasing.
41  QualType type) {
42  // retain, strong, copy, weak, and unsafe_unretained are only legal
43  // on properties of retainable pointer type.
48  } else if (attrs & ObjCPropertyDecl::OBJC_PR_weak) {
49  return Qualifiers::OCL_Weak;
52  }
53 
54  // assign can appear on other types, so we have to check the
55  // property type.
57  type->isObjCRetainableType()) {
59  }
60 
61  return Qualifiers::OCL_None;
62 }
63 
64 /// Check the internal consistency of a property declaration with
65 /// an explicit ownership qualifier.
67  ObjCPropertyDecl *property) {
68  if (property->isInvalidDecl()) return;
69 
71  = property->getPropertyAttributes();
72  Qualifiers::ObjCLifetime propertyLifetime
73  = property->getType().getObjCLifetime();
74 
75  assert(propertyLifetime != Qualifiers::OCL_None);
76 
77  Qualifiers::ObjCLifetime expectedLifetime
78  = getImpliedARCOwnership(propertyKind, property->getType());
79  if (!expectedLifetime) {
80  // We have a lifetime qualifier but no dominating property
81  // attribute. That's okay, but restore reasonable invariants by
82  // setting the property attribute according to the lifetime
83  // qualifier.
85  if (propertyLifetime == Qualifiers::OCL_Strong) {
87  } else if (propertyLifetime == Qualifiers::OCL_Weak) {
89  } else {
90  assert(propertyLifetime == Qualifiers::OCL_ExplicitNone);
92  }
93  property->setPropertyAttributes(attr);
94  return;
95  }
96 
97  if (propertyLifetime == expectedLifetime) return;
98 
99  property->setInvalidDecl();
100  S.Diag(property->getLocation(),
101  diag::err_arc_inconsistent_property_ownership)
102  << property->getDeclName()
103  << expectedLifetime
104  << propertyLifetime;
105 }
106 
107 /// \brief Check this Objective-C property against a property declared in the
108 /// given protocol.
109 static void
111  ObjCProtocolDecl *Proto,
112  llvm::SmallPtrSetImpl<ObjCProtocolDecl *> &Known) {
113  // Have we seen this protocol before?
114  if (!Known.insert(Proto).second)
115  return;
116 
117  // Look for a property with the same name.
118  DeclContext::lookup_result R = Proto->lookup(Prop->getDeclName());
119  for (unsigned I = 0, N = R.size(); I != N; ++I) {
120  if (ObjCPropertyDecl *ProtoProp = dyn_cast<ObjCPropertyDecl>(R[I])) {
121  S.DiagnosePropertyMismatch(Prop, ProtoProp, Proto->getIdentifier(), true);
122  return;
123  }
124  }
125 
126  // Check this property against any protocols we inherit.
127  for (auto *P : Proto->protocols())
128  CheckPropertyAgainstProtocol(S, Prop, P, Known);
129 }
130 
132  // In GC mode, just look for the __weak qualifier.
133  if (S.getLangOpts().getGC() != LangOptions::NonGC) {
134  if (T.isObjCGCWeak()) return ObjCDeclSpec::DQ_PR_weak;
135 
136  // In ARC/MRC, look for an explicit ownership qualifier.
137  // For some reason, this only applies to __weak.
138  } else if (auto ownership = T.getObjCLifetime()) {
139  switch (ownership) {
148  return 0;
149  }
150  llvm_unreachable("bad qualifier");
151  }
152 
153  return 0;
154 }
155 
156 static const unsigned OwnershipMask =
163 
164 static unsigned getOwnershipRule(unsigned attr) {
165  unsigned result = attr & OwnershipMask;
166 
167  // From an ownership perspective, assign and unsafe_unretained are
168  // identical; make sure one also implies the other.
169  if (result & (ObjCPropertyDecl::OBJC_PR_assign |
173  }
174 
175  return result;
176 }
177 
179  SourceLocation LParenLoc,
180  FieldDeclarator &FD,
181  ObjCDeclSpec &ODS,
182  Selector GetterSel,
183  Selector SetterSel,
184  tok::ObjCKeywordKind MethodImplKind,
185  DeclContext *lexicalDC) {
186  unsigned Attributes = ODS.getPropertyAttributes();
187  FD.D.setObjCWeakProperty((Attributes & ObjCDeclSpec::DQ_PR_weak) != 0);
188  TypeSourceInfo *TSI = GetTypeForDeclarator(FD.D, S);
189  QualType T = TSI->getType();
190  if (!getOwnershipRule(Attributes)) {
191  Attributes |= deducePropertyOwnershipFromType(*this, T);
192  }
193  bool isReadWrite = ((Attributes & ObjCDeclSpec::DQ_PR_readwrite) ||
194  // default is readwrite!
195  !(Attributes & ObjCDeclSpec::DQ_PR_readonly));
196 
197  // Proceed with constructing the ObjCPropertyDecls.
198  ObjCContainerDecl *ClassDecl = cast<ObjCContainerDecl>(CurContext);
199  ObjCPropertyDecl *Res = nullptr;
200  if (ObjCCategoryDecl *CDecl = dyn_cast<ObjCCategoryDecl>(ClassDecl)) {
201  if (CDecl->IsClassExtension()) {
202  Res = HandlePropertyInClassExtension(S, AtLoc, LParenLoc,
203  FD,
204  GetterSel, ODS.getGetterNameLoc(),
205  SetterSel, ODS.getSetterNameLoc(),
206  isReadWrite, Attributes,
207  ODS.getPropertyAttributes(),
208  T, TSI, MethodImplKind);
209  if (!Res)
210  return nullptr;
211  }
212  }
213 
214  if (!Res) {
215  Res = CreatePropertyDecl(S, ClassDecl, AtLoc, LParenLoc, FD,
216  GetterSel, ODS.getGetterNameLoc(), SetterSel,
217  ODS.getSetterNameLoc(), isReadWrite, Attributes,
218  ODS.getPropertyAttributes(), T, TSI,
219  MethodImplKind);
220  if (lexicalDC)
221  Res->setLexicalDeclContext(lexicalDC);
222  }
223 
224  // Validate the attributes on the @property.
225  CheckObjCPropertyAttributes(Res, AtLoc, Attributes,
226  (isa<ObjCInterfaceDecl>(ClassDecl) ||
227  isa<ObjCProtocolDecl>(ClassDecl)));
228 
229  // Check consistency if the type has explicit ownership qualification.
230  if (Res->getType().getObjCLifetime())
231  checkPropertyDeclWithOwnership(*this, Res);
232 
233  llvm::SmallPtrSet<ObjCProtocolDecl *, 16> KnownProtos;
234  if (ObjCInterfaceDecl *IFace = dyn_cast<ObjCInterfaceDecl>(ClassDecl)) {
235  // For a class, compare the property against a property in our superclass.
236  bool FoundInSuper = false;
237  ObjCInterfaceDecl *CurrentInterfaceDecl = IFace;
238  while (ObjCInterfaceDecl *Super = CurrentInterfaceDecl->getSuperClass()) {
239  DeclContext::lookup_result R = Super->lookup(Res->getDeclName());
240  for (unsigned I = 0, N = R.size(); I != N; ++I) {
241  if (ObjCPropertyDecl *SuperProp = dyn_cast<ObjCPropertyDecl>(R[I])) {
242  DiagnosePropertyMismatch(Res, SuperProp, Super->getIdentifier(), false);
243  FoundInSuper = true;
244  break;
245  }
246  }
247  if (FoundInSuper)
248  break;
249  else
250  CurrentInterfaceDecl = Super;
251  }
252 
253  if (FoundInSuper) {
254  // Also compare the property against a property in our protocols.
255  for (auto *P : CurrentInterfaceDecl->protocols()) {
256  CheckPropertyAgainstProtocol(*this, Res, P, KnownProtos);
257  }
258  } else {
259  // Slower path: look in all protocols we referenced.
260  for (auto *P : IFace->all_referenced_protocols()) {
261  CheckPropertyAgainstProtocol(*this, Res, P, KnownProtos);
262  }
263  }
264  } else if (ObjCCategoryDecl *Cat = dyn_cast<ObjCCategoryDecl>(ClassDecl)) {
265  // We don't check if class extension. Because properties in class extension
266  // are meant to override some of the attributes and checking has already done
267  // when property in class extension is constructed.
268  if (!Cat->IsClassExtension())
269  for (auto *P : Cat->protocols())
270  CheckPropertyAgainstProtocol(*this, Res, P, KnownProtos);
271  } else {
272  ObjCProtocolDecl *Proto = cast<ObjCProtocolDecl>(ClassDecl);
273  for (auto *P : Proto->protocols())
274  CheckPropertyAgainstProtocol(*this, Res, P, KnownProtos);
275  }
276 
278  return Res;
279 }
280 
282 makePropertyAttributesAsWritten(unsigned Attributes) {
283  unsigned attributesAsWritten = 0;
284  if (Attributes & ObjCDeclSpec::DQ_PR_readonly)
285  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_readonly;
286  if (Attributes & ObjCDeclSpec::DQ_PR_readwrite)
287  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_readwrite;
288  if (Attributes & ObjCDeclSpec::DQ_PR_getter)
289  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_getter;
290  if (Attributes & ObjCDeclSpec::DQ_PR_setter)
291  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_setter;
292  if (Attributes & ObjCDeclSpec::DQ_PR_assign)
293  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_assign;
294  if (Attributes & ObjCDeclSpec::DQ_PR_retain)
295  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_retain;
296  if (Attributes & ObjCDeclSpec::DQ_PR_strong)
297  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_strong;
298  if (Attributes & ObjCDeclSpec::DQ_PR_weak)
299  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_weak;
300  if (Attributes & ObjCDeclSpec::DQ_PR_copy)
301  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_copy;
302  if (Attributes & ObjCDeclSpec::DQ_PR_unsafe_unretained)
303  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_unsafe_unretained;
304  if (Attributes & ObjCDeclSpec::DQ_PR_nonatomic)
305  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_nonatomic;
306  if (Attributes & ObjCDeclSpec::DQ_PR_atomic)
307  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_atomic;
308  if (Attributes & ObjCDeclSpec::DQ_PR_class)
309  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_class;
310 
311  return (ObjCPropertyDecl::PropertyAttributeKind)attributesAsWritten;
312 }
313 
314 static bool LocPropertyAttribute( ASTContext &Context, const char *attrName,
315  SourceLocation LParenLoc, SourceLocation &Loc) {
316  if (LParenLoc.isMacroID())
317  return false;
318 
319  SourceManager &SM = Context.getSourceManager();
320  std::pair<FileID, unsigned> locInfo = SM.getDecomposedLoc(LParenLoc);
321  // Try to load the file buffer.
322  bool invalidTemp = false;
323  StringRef file = SM.getBufferData(locInfo.first, &invalidTemp);
324  if (invalidTemp)
325  return false;
326  const char *tokenBegin = file.data() + locInfo.second;
327 
328  // Lex from the start of the given location.
329  Lexer lexer(SM.getLocForStartOfFile(locInfo.first),
330  Context.getLangOpts(),
331  file.begin(), tokenBegin, file.end());
332  Token Tok;
333  do {
334  lexer.LexFromRawLexer(Tok);
335  if (Tok.is(tok::raw_identifier) && Tok.getRawIdentifier() == attrName) {
336  Loc = Tok.getLocation();
337  return true;
338  }
339  } while (Tok.isNot(tok::r_paren));
340  return false;
341 }
342 
343 /// Check for a mismatch in the atomicity of the given properties.
345  ObjCPropertyDecl *OldProperty,
346  ObjCPropertyDecl *NewProperty,
347  bool PropagateAtomicity) {
348  // If the atomicity of both matches, we're done.
349  bool OldIsAtomic =
351  == 0;
352  bool NewIsAtomic =
354  == 0;
355  if (OldIsAtomic == NewIsAtomic) return;
356 
357  // Determine whether the given property is readonly and implicitly
358  // atomic.
359  auto isImplicitlyReadonlyAtomic = [](ObjCPropertyDecl *Property) -> bool {
360  // Is it readonly?
361  auto Attrs = Property->getPropertyAttributes();
362  if ((Attrs & ObjCPropertyDecl::OBJC_PR_readonly) == 0) return false;
363 
364  // Is it nonatomic?
365  if (Attrs & ObjCPropertyDecl::OBJC_PR_nonatomic) return false;
366 
367  // Was 'atomic' specified directly?
368  if (Property->getPropertyAttributesAsWritten() &
370  return false;
371 
372  return true;
373  };
374 
375  // If we're allowed to propagate atomicity, and the new property did
376  // not specify atomicity at all, propagate.
377  const unsigned AtomicityMask =
379  if (PropagateAtomicity &&
380  ((NewProperty->getPropertyAttributesAsWritten() & AtomicityMask) == 0)) {
381  unsigned Attrs = NewProperty->getPropertyAttributes();
382  Attrs = Attrs & ~AtomicityMask;
383  if (OldIsAtomic)
385  else
387 
388  NewProperty->overwritePropertyAttributes(Attrs);
389  return;
390  }
391 
392  // One of the properties is atomic; if it's a readonly property, and
393  // 'atomic' wasn't explicitly specified, we're okay.
394  if ((OldIsAtomic && isImplicitlyReadonlyAtomic(OldProperty)) ||
395  (NewIsAtomic && isImplicitlyReadonlyAtomic(NewProperty)))
396  return;
397 
398  // Diagnose the conflict.
399  const IdentifierInfo *OldContextName;
400  auto *OldDC = OldProperty->getDeclContext();
401  if (auto Category = dyn_cast<ObjCCategoryDecl>(OldDC))
402  OldContextName = Category->getClassInterface()->getIdentifier();
403  else
404  OldContextName = cast<ObjCContainerDecl>(OldDC)->getIdentifier();
405 
406  S.Diag(NewProperty->getLocation(), diag::warn_property_attribute)
407  << NewProperty->getDeclName() << "atomic"
408  << OldContextName;
409  S.Diag(OldProperty->getLocation(), diag::note_property_declare);
410 }
411 
414  SourceLocation AtLoc,
415  SourceLocation LParenLoc,
416  FieldDeclarator &FD,
417  Selector GetterSel,
418  SourceLocation GetterNameLoc,
419  Selector SetterSel,
420  SourceLocation SetterNameLoc,
421  const bool isReadWrite,
422  unsigned &Attributes,
423  const unsigned AttributesAsWritten,
424  QualType T,
425  TypeSourceInfo *TSI,
426  tok::ObjCKeywordKind MethodImplKind) {
427  ObjCCategoryDecl *CDecl = cast<ObjCCategoryDecl>(CurContext);
428  // Diagnose if this property is already in continuation class.
429  DeclContext *DC = CurContext;
430  IdentifierInfo *PropertyId = FD.D.getIdentifier();
431  ObjCInterfaceDecl *CCPrimary = CDecl->getClassInterface();
432 
433  // We need to look in the @interface to see if the @property was
434  // already declared.
435  if (!CCPrimary) {
436  Diag(CDecl->getLocation(), diag::err_continuation_class);
437  return nullptr;
438  }
439 
440  bool isClassProperty = (AttributesAsWritten & ObjCDeclSpec::DQ_PR_class) ||
441  (Attributes & ObjCDeclSpec::DQ_PR_class);
442 
443  // Find the property in the extended class's primary class or
444  // extensions.
446  PropertyId, ObjCPropertyDecl::getQueryKind(isClassProperty));
447 
448  // If we found a property in an extension, complain.
449  if (PIDecl && isa<ObjCCategoryDecl>(PIDecl->getDeclContext())) {
450  Diag(AtLoc, diag::err_duplicate_property);
451  Diag(PIDecl->getLocation(), diag::note_property_declare);
452  return nullptr;
453  }
454 
455  // Check for consistency with the previous declaration, if there is one.
456  if (PIDecl) {
457  // A readonly property declared in the primary class can be refined
458  // by adding a readwrite property within an extension.
459  // Anything else is an error.
460  if (!(PIDecl->isReadOnly() && isReadWrite)) {
461  // Tailor the diagnostics for the common case where a readwrite
462  // property is declared both in the @interface and the continuation.
463  // This is a common error where the user often intended the original
464  // declaration to be readonly.
465  unsigned diag =
466  (Attributes & ObjCDeclSpec::DQ_PR_readwrite) &&
467  (PIDecl->getPropertyAttributesAsWritten() &
469  ? diag::err_use_continuation_class_redeclaration_readwrite
470  : diag::err_use_continuation_class;
471  Diag(AtLoc, diag)
472  << CCPrimary->getDeclName();
473  Diag(PIDecl->getLocation(), diag::note_property_declare);
474  return nullptr;
475  }
476 
477  // Check for consistency of getters.
478  if (PIDecl->getGetterName() != GetterSel) {
479  // If the getter was written explicitly, complain.
480  if (AttributesAsWritten & ObjCDeclSpec::DQ_PR_getter) {
481  Diag(AtLoc, diag::warn_property_redecl_getter_mismatch)
482  << PIDecl->getGetterName() << GetterSel;
483  Diag(PIDecl->getLocation(), diag::note_property_declare);
484  }
485 
486  // Always adopt the getter from the original declaration.
487  GetterSel = PIDecl->getGetterName();
488  Attributes |= ObjCDeclSpec::DQ_PR_getter;
489  }
490 
491  // Check consistency of ownership.
492  unsigned ExistingOwnership
494  unsigned NewOwnership = getOwnershipRule(Attributes);
495  if (ExistingOwnership && NewOwnership != ExistingOwnership) {
496  // If the ownership was written explicitly, complain.
497  if (getOwnershipRule(AttributesAsWritten)) {
498  Diag(AtLoc, diag::warn_property_attr_mismatch);
499  Diag(PIDecl->getLocation(), diag::note_property_declare);
500  }
501 
502  // Take the ownership from the original property.
503  Attributes = (Attributes & ~OwnershipMask) | ExistingOwnership;
504  }
505 
506  // If the redeclaration is 'weak' but the original property is not,
507  if ((Attributes & ObjCPropertyDecl::OBJC_PR_weak) &&
510  PIDecl->getType()->getAs<ObjCObjectPointerType>() &&
512  Diag(AtLoc, diag::warn_property_implicitly_mismatched);
513  Diag(PIDecl->getLocation(), diag::note_property_declare);
514  }
515  }
516 
517  // Create a new ObjCPropertyDecl with the DeclContext being
518  // the class extension.
519  ObjCPropertyDecl *PDecl = CreatePropertyDecl(S, CDecl, AtLoc, LParenLoc,
520  FD, GetterSel, GetterNameLoc,
521  SetterSel, SetterNameLoc,
522  isReadWrite,
523  Attributes, AttributesAsWritten,
524  T, TSI, MethodImplKind, DC);
525 
526  // If there was no declaration of a property with the same name in
527  // the primary class, we're done.
528  if (!PIDecl) {
529  ProcessPropertyDecl(PDecl);
530  return PDecl;
531  }
532 
533  if (!Context.hasSameType(PIDecl->getType(), PDecl->getType())) {
534  bool IncompatibleObjC = false;
535  QualType ConvertedType;
536  // Relax the strict type matching for property type in continuation class.
537  // Allow property object type of continuation class to be different as long
538  // as it narrows the object type in its primary class property. Note that
539  // this conversion is safe only because the wider type is for a 'readonly'
540  // property in primary class and 'narrowed' type for a 'readwrite' property
541  // in continuation class.
542  QualType PrimaryClassPropertyT = Context.getCanonicalType(PIDecl->getType());
543  QualType ClassExtPropertyT = Context.getCanonicalType(PDecl->getType());
544  if (!isa<ObjCObjectPointerType>(PrimaryClassPropertyT) ||
545  !isa<ObjCObjectPointerType>(ClassExtPropertyT) ||
546  (!isObjCPointerConversion(ClassExtPropertyT, PrimaryClassPropertyT,
547  ConvertedType, IncompatibleObjC))
548  || IncompatibleObjC) {
549  Diag(AtLoc,
550  diag::err_type_mismatch_continuation_class) << PDecl->getType();
551  Diag(PIDecl->getLocation(), diag::note_property_declare);
552  return nullptr;
553  }
554  }
555 
556  // Check that atomicity of property in class extension matches the previous
557  // declaration.
558  checkAtomicPropertyMismatch(*this, PIDecl, PDecl, true);
559 
560  // Make sure getter/setter are appropriately synthesized.
561  ProcessPropertyDecl(PDecl);
562  return PDecl;
563 }
564 
566  ObjCContainerDecl *CDecl,
567  SourceLocation AtLoc,
568  SourceLocation LParenLoc,
569  FieldDeclarator &FD,
570  Selector GetterSel,
571  SourceLocation GetterNameLoc,
572  Selector SetterSel,
573  SourceLocation SetterNameLoc,
574  const bool isReadWrite,
575  const unsigned Attributes,
576  const unsigned AttributesAsWritten,
577  QualType T,
578  TypeSourceInfo *TInfo,
579  tok::ObjCKeywordKind MethodImplKind,
580  DeclContext *lexicalDC){
581  IdentifierInfo *PropertyId = FD.D.getIdentifier();
582 
583  // Property defaults to 'assign' if it is readwrite, unless this is ARC
584  // and the type is retainable.
585  bool isAssign;
586  if (Attributes & (ObjCDeclSpec::DQ_PR_assign |
588  isAssign = true;
589  } else if (getOwnershipRule(Attributes) || !isReadWrite) {
590  isAssign = false;
591  } else {
592  isAssign = (!getLangOpts().ObjCAutoRefCount ||
593  !T->isObjCRetainableType());
594  }
595 
596  // Issue a warning if property is 'assign' as default and its
597  // object, which is gc'able conforms to NSCopying protocol
598  if (getLangOpts().getGC() != LangOptions::NonGC &&
599  isAssign && !(Attributes & ObjCDeclSpec::DQ_PR_assign)) {
600  if (const ObjCObjectPointerType *ObjPtrTy =
602  ObjCInterfaceDecl *IDecl = ObjPtrTy->getObjectType()->getInterface();
603  if (IDecl)
604  if (ObjCProtocolDecl* PNSCopying =
605  LookupProtocol(&Context.Idents.get("NSCopying"), AtLoc))
606  if (IDecl->ClassImplementsProtocol(PNSCopying, true))
607  Diag(AtLoc, diag::warn_implements_nscopying) << PropertyId;
608  }
609  }
610 
611  if (T->isObjCObjectType()) {
612  SourceLocation StarLoc = TInfo->getTypeLoc().getLocEnd();
613  StarLoc = getLocForEndOfToken(StarLoc);
614  Diag(FD.D.getIdentifierLoc(), diag::err_statically_allocated_object)
615  << FixItHint::CreateInsertion(StarLoc, "*");
617  SourceLocation TLoc = TInfo->getTypeLoc().getLocStart();
618  TInfo = Context.getTrivialTypeSourceInfo(T, TLoc);
619  }
620 
621  DeclContext *DC = cast<DeclContext>(CDecl);
623  FD.D.getIdentifierLoc(),
624  PropertyId, AtLoc,
625  LParenLoc, T, TInfo);
626 
627  bool isClassProperty = (AttributesAsWritten & ObjCDeclSpec::DQ_PR_class) ||
628  (Attributes & ObjCDeclSpec::DQ_PR_class);
629  // Class property and instance property can have the same name.
631  DC, PropertyId, ObjCPropertyDecl::getQueryKind(isClassProperty))) {
632  Diag(PDecl->getLocation(), diag::err_duplicate_property);
633  Diag(prevDecl->getLocation(), diag::note_property_declare);
634  PDecl->setInvalidDecl();
635  }
636  else {
637  DC->addDecl(PDecl);
638  if (lexicalDC)
639  PDecl->setLexicalDeclContext(lexicalDC);
640  }
641 
642  if (T->isArrayType() || T->isFunctionType()) {
643  Diag(AtLoc, diag::err_property_type) << T;
644  PDecl->setInvalidDecl();
645  }
646 
647  ProcessDeclAttributes(S, PDecl, FD.D);
648 
649  // Regardless of setter/getter attribute, we save the default getter/setter
650  // selector names in anticipation of declaration of setter/getter methods.
651  PDecl->setGetterName(GetterSel, GetterNameLoc);
652  PDecl->setSetterName(SetterSel, SetterNameLoc);
653  PDecl->setPropertyAttributesAsWritten(
654  makePropertyAttributesAsWritten(AttributesAsWritten));
655 
656  if (Attributes & ObjCDeclSpec::DQ_PR_readonly)
657  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_readonly);
658 
659  if (Attributes & ObjCDeclSpec::DQ_PR_getter)
660  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_getter);
661 
662  if (Attributes & ObjCDeclSpec::DQ_PR_setter)
663  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_setter);
664 
665  if (isReadWrite)
666  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_readwrite);
667 
668  if (Attributes & ObjCDeclSpec::DQ_PR_retain)
669  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_retain);
670 
671  if (Attributes & ObjCDeclSpec::DQ_PR_strong)
672  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_strong);
673 
674  if (Attributes & ObjCDeclSpec::DQ_PR_weak)
675  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_weak);
676 
677  if (Attributes & ObjCDeclSpec::DQ_PR_copy)
678  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_copy);
679 
680  if (Attributes & ObjCDeclSpec::DQ_PR_unsafe_unretained)
681  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_unsafe_unretained);
682 
683  if (isAssign)
684  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_assign);
685 
686  // In the semantic attributes, one of nonatomic or atomic is always set.
687  if (Attributes & ObjCDeclSpec::DQ_PR_nonatomic)
688  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_nonatomic);
689  else
690  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_atomic);
691 
692  // 'unsafe_unretained' is alias for 'assign'.
693  if (Attributes & ObjCDeclSpec::DQ_PR_unsafe_unretained)
694  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_assign);
695  if (isAssign)
696  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_unsafe_unretained);
697 
698  if (MethodImplKind == tok::objc_required)
699  PDecl->setPropertyImplementation(ObjCPropertyDecl::Required);
700  else if (MethodImplKind == tok::objc_optional)
701  PDecl->setPropertyImplementation(ObjCPropertyDecl::Optional);
702 
703  if (Attributes & ObjCDeclSpec::DQ_PR_nullability)
704  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_nullability);
705 
706  if (Attributes & ObjCDeclSpec::DQ_PR_null_resettable)
707  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_null_resettable);
708 
709  if (Attributes & ObjCDeclSpec::DQ_PR_class)
710  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_class);
711 
712  return PDecl;
713 }
714 
715 static void checkARCPropertyImpl(Sema &S, SourceLocation propertyImplLoc,
716  ObjCPropertyDecl *property,
717  ObjCIvarDecl *ivar) {
718  if (property->isInvalidDecl() || ivar->isInvalidDecl()) return;
719 
720  QualType ivarType = ivar->getType();
721  Qualifiers::ObjCLifetime ivarLifetime = ivarType.getObjCLifetime();
722 
723  // The lifetime implied by the property's attributes.
724  Qualifiers::ObjCLifetime propertyLifetime =
726  property->getType());
727 
728  // We're fine if they match.
729  if (propertyLifetime == ivarLifetime) return;
730 
731  // None isn't a valid lifetime for an object ivar in ARC, and
732  // __autoreleasing is never valid; don't diagnose twice.
733  if ((ivarLifetime == Qualifiers::OCL_None &&
734  S.getLangOpts().ObjCAutoRefCount) ||
735  ivarLifetime == Qualifiers::OCL_Autoreleasing)
736  return;
737 
738  // If the ivar is private, and it's implicitly __unsafe_unretained
739  // becaues of its type, then pretend it was actually implicitly
740  // __strong. This is only sound because we're processing the
741  // property implementation before parsing any method bodies.
742  if (ivarLifetime == Qualifiers::OCL_ExplicitNone &&
743  propertyLifetime == Qualifiers::OCL_Strong &&
745  SplitQualType split = ivarType.split();
746  if (split.Quals.hasObjCLifetime()) {
747  assert(ivarType->isObjCARCImplicitlyUnretainedType());
749  ivarType = S.Context.getQualifiedType(split);
750  ivar->setType(ivarType);
751  return;
752  }
753  }
754 
755  switch (propertyLifetime) {
757  S.Diag(ivar->getLocation(), diag::err_arc_strong_property_ownership)
758  << property->getDeclName()
759  << ivar->getDeclName()
760  << ivarLifetime;
761  break;
762 
764  S.Diag(ivar->getLocation(), diag::err_weak_property)
765  << property->getDeclName()
766  << ivar->getDeclName();
767  break;
768 
770  S.Diag(ivar->getLocation(), diag::err_arc_assign_property_ownership)
771  << property->getDeclName()
772  << ivar->getDeclName()
773  << ((property->getPropertyAttributesAsWritten()
775  break;
776 
778  llvm_unreachable("properties cannot be autoreleasing");
779 
781  // Any other property should be ignored.
782  return;
783  }
784 
785  S.Diag(property->getLocation(), diag::note_property_declare);
786  if (propertyImplLoc.isValid())
787  S.Diag(propertyImplLoc, diag::note_property_synthesize);
788 }
789 
790 /// setImpliedPropertyAttributeForReadOnlyProperty -
791 /// This routine evaludates life-time attributes for a 'readonly'
792 /// property with no known lifetime of its own, using backing
793 /// 'ivar's attribute, if any. If no backing 'ivar', property's
794 /// life-time is assumed 'strong'.
796  ObjCPropertyDecl *property, ObjCIvarDecl *ivar) {
797  Qualifiers::ObjCLifetime propertyLifetime =
799  property->getType());
800  if (propertyLifetime != Qualifiers::OCL_None)
801  return;
802 
803  if (!ivar) {
804  // if no backing ivar, make property 'strong'.
805  property->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_strong);
806  return;
807  }
808  // property assumes owenership of backing ivar.
809  QualType ivarType = ivar->getType();
810  Qualifiers::ObjCLifetime ivarLifetime = ivarType.getObjCLifetime();
811  if (ivarLifetime == Qualifiers::OCL_Strong)
812  property->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_strong);
813  else if (ivarLifetime == Qualifiers::OCL_Weak)
814  property->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_weak);
815 }
816 
817 /// DiagnosePropertyMismatchDeclInProtocols - diagnose properties declared
818 /// in inherited protocols with mismatched types. Since any of them can
819 /// be candidate for synthesis.
820 static void
822  ObjCInterfaceDecl *ClassDecl,
825  for (const auto *PI : ClassDecl->all_referenced_protocols()) {
826  if (const ObjCProtocolDecl *PDecl = PI->getDefinition())
827  PDecl->collectInheritedProtocolProperties(Property, PropMap);
828  }
829  if (ObjCInterfaceDecl *SDecl = ClassDecl->getSuperClass())
830  while (SDecl) {
831  for (const auto *PI : SDecl->all_referenced_protocols()) {
832  if (const ObjCProtocolDecl *PDecl = PI->getDefinition())
833  PDecl->collectInheritedProtocolProperties(Property, PropMap);
834  }
835  SDecl = SDecl->getSuperClass();
836  }
837 
838  if (PropMap.empty())
839  return;
840 
841  QualType RHSType = S.Context.getCanonicalType(Property->getType());
842  bool FirsTime = true;
843  for (ObjCInterfaceDecl::ProtocolPropertyMap::iterator
844  I = PropMap.begin(), E = PropMap.end(); I != E; I++) {
845  ObjCPropertyDecl *Prop = I->second;
846  QualType LHSType = S.Context.getCanonicalType(Prop->getType());
847  if (!S.Context.propertyTypesAreCompatible(LHSType, RHSType)) {
848  bool IncompatibleObjC = false;
849  QualType ConvertedType;
850  if (!S.isObjCPointerConversion(RHSType, LHSType, ConvertedType, IncompatibleObjC)
851  || IncompatibleObjC) {
852  if (FirsTime) {
853  S.Diag(Property->getLocation(), diag::warn_protocol_property_mismatch)
854  << Property->getType();
855  FirsTime = false;
856  }
857  S.Diag(Prop->getLocation(), diag::note_protocol_property_declare)
858  << Prop->getType();
859  }
860  }
861  }
862  if (!FirsTime && AtLoc.isValid())
863  S.Diag(AtLoc, diag::note_property_synthesize);
864 }
865 
866 /// Determine whether any storage attributes were written on the property.
868  ObjCPropertyQueryKind QueryKind) {
869  if (Prop->getPropertyAttributesAsWritten() & OwnershipMask) return true;
870 
871  // If this is a readwrite property in a class extension that refines
872  // a readonly property in the original class definition, check it as
873  // well.
874 
875  // If it's a readonly property, we're not interested.
876  if (Prop->isReadOnly()) return false;
877 
878  // Is it declared in an extension?
879  auto Category = dyn_cast<ObjCCategoryDecl>(Prop->getDeclContext());
880  if (!Category || !Category->IsClassExtension()) return false;
881 
882  // Find the corresponding property in the primary class definition.
883  auto OrigClass = Category->getClassInterface();
884  for (auto Found : OrigClass->lookup(Prop->getDeclName())) {
885  if (ObjCPropertyDecl *OrigProp = dyn_cast<ObjCPropertyDecl>(Found))
886  return OrigProp->getPropertyAttributesAsWritten() & OwnershipMask;
887  }
888 
889  // Look through all of the protocols.
890  for (const auto *Proto : OrigClass->all_referenced_protocols()) {
891  if (ObjCPropertyDecl *OrigProp = Proto->FindPropertyDeclaration(
892  Prop->getIdentifier(), QueryKind))
893  return OrigProp->getPropertyAttributesAsWritten() & OwnershipMask;
894  }
895 
896  return false;
897 }
898 
899 /// ActOnPropertyImplDecl - This routine performs semantic checks and
900 /// builds the AST node for a property implementation declaration; declared
901 /// as \@synthesize or \@dynamic.
902 ///
904  SourceLocation AtLoc,
905  SourceLocation PropertyLoc,
906  bool Synthesize,
907  IdentifierInfo *PropertyId,
908  IdentifierInfo *PropertyIvar,
909  SourceLocation PropertyIvarLoc,
910  ObjCPropertyQueryKind QueryKind) {
911  ObjCContainerDecl *ClassImpDecl =
912  dyn_cast<ObjCContainerDecl>(CurContext);
913  // Make sure we have a context for the property implementation declaration.
914  if (!ClassImpDecl) {
915  Diag(AtLoc, diag::err_missing_property_context);
916  return nullptr;
917  }
918  if (PropertyIvarLoc.isInvalid())
919  PropertyIvarLoc = PropertyLoc;
920  SourceLocation PropertyDiagLoc = PropertyLoc;
921  if (PropertyDiagLoc.isInvalid())
922  PropertyDiagLoc = ClassImpDecl->getLocStart();
923  ObjCPropertyDecl *property = nullptr;
924  ObjCInterfaceDecl *IDecl = nullptr;
925  // Find the class or category class where this property must have
926  // a declaration.
927  ObjCImplementationDecl *IC = nullptr;
928  ObjCCategoryImplDecl *CatImplClass = nullptr;
929  if ((IC = dyn_cast<ObjCImplementationDecl>(ClassImpDecl))) {
930  IDecl = IC->getClassInterface();
931  // We always synthesize an interface for an implementation
932  // without an interface decl. So, IDecl is always non-zero.
933  assert(IDecl &&
934  "ActOnPropertyImplDecl - @implementation without @interface");
935 
936  // Look for this property declaration in the @implementation's @interface
937  property = IDecl->FindPropertyDeclaration(PropertyId, QueryKind);
938  if (!property) {
939  Diag(PropertyLoc, diag::err_bad_property_decl) << IDecl->getDeclName();
940  return nullptr;
941  }
942  if (property->isClassProperty() && Synthesize) {
943  Diag(PropertyLoc, diag::err_synthesize_on_class_property) << PropertyId;
944  return nullptr;
945  }
946  unsigned PIkind = property->getPropertyAttributesAsWritten();
947  if ((PIkind & (ObjCPropertyDecl::OBJC_PR_atomic |
949  if (AtLoc.isValid())
950  Diag(AtLoc, diag::warn_implicit_atomic_property);
951  else
952  Diag(IC->getLocation(), diag::warn_auto_implicit_atomic_property);
953  Diag(property->getLocation(), diag::note_property_declare);
954  }
955 
956  if (const ObjCCategoryDecl *CD =
957  dyn_cast<ObjCCategoryDecl>(property->getDeclContext())) {
958  if (!CD->IsClassExtension()) {
959  Diag(PropertyLoc, diag::err_category_property) << CD->getDeclName();
960  Diag(property->getLocation(), diag::note_property_declare);
961  return nullptr;
962  }
963  }
964  if (Synthesize&&
966  property->hasAttr<IBOutletAttr>() &&
967  !AtLoc.isValid()) {
968  bool ReadWriteProperty = false;
969  // Search into the class extensions and see if 'readonly property is
970  // redeclared 'readwrite', then no warning is to be issued.
971  for (auto *Ext : IDecl->known_extensions()) {
972  DeclContext::lookup_result R = Ext->lookup(property->getDeclName());
973  if (!R.empty())
974  if (ObjCPropertyDecl *ExtProp = dyn_cast<ObjCPropertyDecl>(R[0])) {
975  PIkind = ExtProp->getPropertyAttributesAsWritten();
977  ReadWriteProperty = true;
978  break;
979  }
980  }
981  }
982 
983  if (!ReadWriteProperty) {
984  Diag(property->getLocation(), diag::warn_auto_readonly_iboutlet_property)
985  << property;
986  SourceLocation readonlyLoc;
987  if (LocPropertyAttribute(Context, "readonly",
988  property->getLParenLoc(), readonlyLoc)) {
989  SourceLocation endLoc =
990  readonlyLoc.getLocWithOffset(strlen("readonly")-1);
991  SourceRange ReadonlySourceRange(readonlyLoc, endLoc);
992  Diag(property->getLocation(),
993  diag::note_auto_readonly_iboutlet_fixup_suggest) <<
994  FixItHint::CreateReplacement(ReadonlySourceRange, "readwrite");
995  }
996  }
997  }
998  if (Synthesize && isa<ObjCProtocolDecl>(property->getDeclContext()))
999  DiagnosePropertyMismatchDeclInProtocols(*this, AtLoc, IDecl, property);
1000 
1001  } else if ((CatImplClass = dyn_cast<ObjCCategoryImplDecl>(ClassImpDecl))) {
1002  if (Synthesize) {
1003  Diag(AtLoc, diag::err_synthesize_category_decl);
1004  return nullptr;
1005  }
1006  IDecl = CatImplClass->getClassInterface();
1007  if (!IDecl) {
1008  Diag(AtLoc, diag::err_missing_property_interface);
1009  return nullptr;
1010  }
1012  IDecl->FindCategoryDeclaration(CatImplClass->getIdentifier());
1013 
1014  // If category for this implementation not found, it is an error which
1015  // has already been reported eralier.
1016  if (!Category)
1017  return nullptr;
1018  // Look for this property declaration in @implementation's category
1019  property = Category->FindPropertyDeclaration(PropertyId, QueryKind);
1020  if (!property) {
1021  Diag(PropertyLoc, diag::err_bad_category_property_decl)
1022  << Category->getDeclName();
1023  return nullptr;
1024  }
1025  } else {
1026  Diag(AtLoc, diag::err_bad_property_context);
1027  return nullptr;
1028  }
1029  ObjCIvarDecl *Ivar = nullptr;
1030  bool CompleteTypeErr = false;
1031  bool compat = true;
1032  // Check that we have a valid, previously declared ivar for @synthesize
1033  if (Synthesize) {
1034  // @synthesize
1035  if (!PropertyIvar)
1036  PropertyIvar = PropertyId;
1037  // Check that this is a previously declared 'ivar' in 'IDecl' interface
1038  ObjCInterfaceDecl *ClassDeclared;
1039  Ivar = IDecl->lookupInstanceVariable(PropertyIvar, ClassDeclared);
1040  QualType PropType = property->getType();
1041  QualType PropertyIvarType = PropType.getNonReferenceType();
1042 
1043  if (RequireCompleteType(PropertyDiagLoc, PropertyIvarType,
1044  diag::err_incomplete_synthesized_property,
1045  property->getDeclName())) {
1046  Diag(property->getLocation(), diag::note_property_declare);
1047  CompleteTypeErr = true;
1048  }
1049 
1050  if (getLangOpts().ObjCAutoRefCount &&
1051  (property->getPropertyAttributesAsWritten() &
1053  PropertyIvarType->isObjCRetainableType()) {
1055  }
1056 
1058  = property->getPropertyAttributes();
1059 
1060  bool isARCWeak = false;
1061  if (kind & ObjCPropertyDecl::OBJC_PR_weak) {
1062  // Add GC __weak to the ivar type if the property is weak.
1063  if (getLangOpts().getGC() != LangOptions::NonGC) {
1064  assert(!getLangOpts().ObjCAutoRefCount);
1065  if (PropertyIvarType.isObjCGCStrong()) {
1066  Diag(PropertyDiagLoc, diag::err_gc_weak_property_strong_type);
1067  Diag(property->getLocation(), diag::note_property_declare);
1068  } else {
1069  PropertyIvarType =
1070  Context.getObjCGCQualType(PropertyIvarType, Qualifiers::Weak);
1071  }
1072 
1073  // Otherwise, check whether ARC __weak is enabled and works with
1074  // the property type.
1075  } else {
1076  if (!getLangOpts().ObjCWeak) {
1077  // Only complain here when synthesizing an ivar.
1078  if (!Ivar) {
1079  Diag(PropertyDiagLoc,
1080  getLangOpts().ObjCWeakRuntime
1081  ? diag::err_synthesizing_arc_weak_property_disabled
1082  : diag::err_synthesizing_arc_weak_property_no_runtime);
1083  Diag(property->getLocation(), diag::note_property_declare);
1084  }
1085  CompleteTypeErr = true; // suppress later diagnostics about the ivar
1086  } else {
1087  isARCWeak = true;
1088  if (const ObjCObjectPointerType *ObjT =
1089  PropertyIvarType->getAs<ObjCObjectPointerType>()) {
1090  const ObjCInterfaceDecl *ObjI = ObjT->getInterfaceDecl();
1091  if (ObjI && ObjI->isArcWeakrefUnavailable()) {
1092  Diag(property->getLocation(),
1093  diag::err_arc_weak_unavailable_property)
1094  << PropertyIvarType;
1095  Diag(ClassImpDecl->getLocation(), diag::note_implemented_by_class)
1096  << ClassImpDecl->getName();
1097  }
1098  }
1099  }
1100  }
1101  }
1102 
1103  if (AtLoc.isInvalid()) {
1104  // Check when default synthesizing a property that there is
1105  // an ivar matching property name and issue warning; since this
1106  // is the most common case of not using an ivar used for backing
1107  // property in non-default synthesis case.
1108  ObjCInterfaceDecl *ClassDeclared=nullptr;
1109  ObjCIvarDecl *originalIvar =
1110  IDecl->lookupInstanceVariable(property->getIdentifier(),
1111  ClassDeclared);
1112  if (originalIvar) {
1113  Diag(PropertyDiagLoc,
1114  diag::warn_autosynthesis_property_ivar_match)
1115  << PropertyId << (Ivar == nullptr) << PropertyIvar
1116  << originalIvar->getIdentifier();
1117  Diag(property->getLocation(), diag::note_property_declare);
1118  Diag(originalIvar->getLocation(), diag::note_ivar_decl);
1119  }
1120  }
1121 
1122  if (!Ivar) {
1123  // In ARC, give the ivar a lifetime qualifier based on the
1124  // property attributes.
1125  if ((getLangOpts().ObjCAutoRefCount || isARCWeak) &&
1126  !PropertyIvarType.getObjCLifetime() &&
1127  PropertyIvarType->isObjCRetainableType()) {
1128 
1129  // It's an error if we have to do this and the user didn't
1130  // explicitly write an ownership attribute on the property.
1131  if (!hasWrittenStorageAttribute(property, QueryKind) &&
1133  Diag(PropertyDiagLoc,
1134  diag::err_arc_objc_property_default_assign_on_object);
1135  Diag(property->getLocation(), diag::note_property_declare);
1136  } else {
1137  Qualifiers::ObjCLifetime lifetime =
1138  getImpliedARCOwnership(kind, PropertyIvarType);
1139  assert(lifetime && "no lifetime for property?");
1140 
1141  Qualifiers qs;
1142  qs.addObjCLifetime(lifetime);
1143  PropertyIvarType = Context.getQualifiedType(PropertyIvarType, qs);
1144  }
1145  }
1146 
1147  Ivar = ObjCIvarDecl::Create(Context, ClassImpDecl,
1148  PropertyIvarLoc,PropertyIvarLoc, PropertyIvar,
1149  PropertyIvarType, /*Dinfo=*/nullptr,
1151  (Expr *)nullptr, true);
1152  if (RequireNonAbstractType(PropertyIvarLoc,
1153  PropertyIvarType,
1154  diag::err_abstract_type_in_decl,
1156  Diag(property->getLocation(), diag::note_property_declare);
1157  // An abstract type is as bad as an incomplete type.
1158  CompleteTypeErr = true;
1159  }
1160  if (CompleteTypeErr)
1161  Ivar->setInvalidDecl();
1162  ClassImpDecl->addDecl(Ivar);
1163  IDecl->makeDeclVisibleInContext(Ivar);
1164 
1166  Diag(PropertyDiagLoc, diag::err_missing_property_ivar_decl)
1167  << PropertyId;
1168  // Note! I deliberately want it to fall thru so, we have a
1169  // a property implementation and to avoid future warnings.
1170  } else if (getLangOpts().ObjCRuntime.isNonFragile() &&
1171  !declaresSameEntity(ClassDeclared, IDecl)) {
1172  Diag(PropertyDiagLoc, diag::err_ivar_in_superclass_use)
1173  << property->getDeclName() << Ivar->getDeclName()
1174  << ClassDeclared->getDeclName();
1175  Diag(Ivar->getLocation(), diag::note_previous_access_declaration)
1176  << Ivar << Ivar->getName();
1177  // Note! I deliberately want it to fall thru so more errors are caught.
1178  }
1179  property->setPropertyIvarDecl(Ivar);
1180 
1181  QualType IvarType = Context.getCanonicalType(Ivar->getType());
1182 
1183  // Check that type of property and its ivar are type compatible.
1184  if (!Context.hasSameType(PropertyIvarType, IvarType)) {
1185  if (isa<ObjCObjectPointerType>(PropertyIvarType)
1186  && isa<ObjCObjectPointerType>(IvarType))
1187  compat =
1189  PropertyIvarType->getAs<ObjCObjectPointerType>(),
1190  IvarType->getAs<ObjCObjectPointerType>());
1191  else {
1192  compat = (CheckAssignmentConstraints(PropertyIvarLoc, PropertyIvarType,
1193  IvarType)
1194  == Compatible);
1195  }
1196  if (!compat) {
1197  Diag(PropertyDiagLoc, diag::err_property_ivar_type)
1198  << property->getDeclName() << PropType
1199  << Ivar->getDeclName() << IvarType;
1200  Diag(Ivar->getLocation(), diag::note_ivar_decl);
1201  // Note! I deliberately want it to fall thru so, we have a
1202  // a property implementation and to avoid future warnings.
1203  }
1204  else {
1205  // FIXME! Rules for properties are somewhat different that those
1206  // for assignments. Use a new routine to consolidate all cases;
1207  // specifically for property redeclarations as well as for ivars.
1208  QualType lhsType =Context.getCanonicalType(PropertyIvarType).getUnqualifiedType();
1209  QualType rhsType =Context.getCanonicalType(IvarType).getUnqualifiedType();
1210  if (lhsType != rhsType &&
1211  lhsType->isArithmeticType()) {
1212  Diag(PropertyDiagLoc, diag::err_property_ivar_type)
1213  << property->getDeclName() << PropType
1214  << Ivar->getDeclName() << IvarType;
1215  Diag(Ivar->getLocation(), diag::note_ivar_decl);
1216  // Fall thru - see previous comment
1217  }
1218  }
1219  // __weak is explicit. So it works on Canonical type.
1220  if ((PropType.isObjCGCWeak() && !IvarType.isObjCGCWeak() &&
1221  getLangOpts().getGC() != LangOptions::NonGC)) {
1222  Diag(PropertyDiagLoc, diag::err_weak_property)
1223  << property->getDeclName() << Ivar->getDeclName();
1224  Diag(Ivar->getLocation(), diag::note_ivar_decl);
1225  // Fall thru - see previous comment
1226  }
1227  // Fall thru - see previous comment
1228  if ((property->getType()->isObjCObjectPointerType() ||
1229  PropType.isObjCGCStrong()) && IvarType.isObjCGCWeak() &&
1230  getLangOpts().getGC() != LangOptions::NonGC) {
1231  Diag(PropertyDiagLoc, diag::err_strong_property)
1232  << property->getDeclName() << Ivar->getDeclName();
1233  // Fall thru - see previous comment
1234  }
1235  }
1236  if (getLangOpts().ObjCAutoRefCount || isARCWeak ||
1237  Ivar->getType().getObjCLifetime())
1238  checkARCPropertyImpl(*this, PropertyLoc, property, Ivar);
1239  } else if (PropertyIvar)
1240  // @dynamic
1241  Diag(PropertyDiagLoc, diag::err_dynamic_property_ivar_decl);
1242 
1243  assert (property && "ActOnPropertyImplDecl - property declaration missing");
1244  ObjCPropertyImplDecl *PIDecl =
1245  ObjCPropertyImplDecl::Create(Context, CurContext, AtLoc, PropertyLoc,
1246  property,
1247  (Synthesize ?
1250  Ivar, PropertyIvarLoc);
1251 
1252  if (CompleteTypeErr || !compat)
1253  PIDecl->setInvalidDecl();
1254 
1255  if (ObjCMethodDecl *getterMethod = property->getGetterMethodDecl()) {
1256  getterMethod->createImplicitParams(Context, IDecl);
1257  if (getLangOpts().CPlusPlus && Synthesize && !CompleteTypeErr &&
1258  Ivar->getType()->isRecordType()) {
1259  // For Objective-C++, need to synthesize the AST for the IVAR object to be
1260  // returned by the getter as it must conform to C++'s copy-return rules.
1261  // FIXME. Eventually we want to do this for Objective-C as well.
1262  SynthesizedFunctionScope Scope(*this, getterMethod);
1263  ImplicitParamDecl *SelfDecl = getterMethod->getSelfDecl();
1264  DeclRefExpr *SelfExpr =
1265  new (Context) DeclRefExpr(SelfDecl, false, SelfDecl->getType(),
1266  VK_LValue, PropertyDiagLoc);
1267  MarkDeclRefReferenced(SelfExpr);
1268  Expr *LoadSelfExpr =
1270  CK_LValueToRValue, SelfExpr, nullptr,
1271  VK_RValue);
1272  Expr *IvarRefExpr =
1273  new (Context) ObjCIvarRefExpr(Ivar,
1274  Ivar->getUsageType(SelfDecl->getType()),
1275  PropertyDiagLoc,
1276  Ivar->getLocation(),
1277  LoadSelfExpr, true, true);
1279  InitializedEntity::InitializeResult(PropertyDiagLoc,
1280  getterMethod->getReturnType(),
1281  /*NRVO=*/false),
1282  PropertyDiagLoc, IvarRefExpr);
1283  if (!Res.isInvalid()) {
1284  Expr *ResExpr = Res.getAs<Expr>();
1285  if (ResExpr)
1286  ResExpr = MaybeCreateExprWithCleanups(ResExpr);
1287  PIDecl->setGetterCXXConstructor(ResExpr);
1288  }
1289  }
1290  if (property->hasAttr<NSReturnsNotRetainedAttr>() &&
1291  !getterMethod->hasAttr<NSReturnsNotRetainedAttr>()) {
1292  Diag(getterMethod->getLocation(),
1293  diag::warn_property_getter_owning_mismatch);
1294  Diag(property->getLocation(), diag::note_property_declare);
1295  }
1296  if (getLangOpts().ObjCAutoRefCount && Synthesize)
1297  switch (getterMethod->getMethodFamily()) {
1298  case OMF_retain:
1299  case OMF_retainCount:
1300  case OMF_release:
1301  case OMF_autorelease:
1302  Diag(getterMethod->getLocation(), diag::err_arc_illegal_method_def)
1303  << 1 << getterMethod->getSelector();
1304  break;
1305  default:
1306  break;
1307  }
1308  }
1309  if (ObjCMethodDecl *setterMethod = property->getSetterMethodDecl()) {
1310  setterMethod->createImplicitParams(Context, IDecl);
1311  if (getLangOpts().CPlusPlus && Synthesize && !CompleteTypeErr &&
1312  Ivar->getType()->isRecordType()) {
1313  // FIXME. Eventually we want to do this for Objective-C as well.
1314  SynthesizedFunctionScope Scope(*this, setterMethod);
1315  ImplicitParamDecl *SelfDecl = setterMethod->getSelfDecl();
1316  DeclRefExpr *SelfExpr =
1317  new (Context) DeclRefExpr(SelfDecl, false, SelfDecl->getType(),
1318  VK_LValue, PropertyDiagLoc);
1319  MarkDeclRefReferenced(SelfExpr);
1320  Expr *LoadSelfExpr =
1322  CK_LValueToRValue, SelfExpr, nullptr,
1323  VK_RValue);
1324  Expr *lhs =
1325  new (Context) ObjCIvarRefExpr(Ivar,
1326  Ivar->getUsageType(SelfDecl->getType()),
1327  PropertyDiagLoc,
1328  Ivar->getLocation(),
1329  LoadSelfExpr, true, true);
1330  ObjCMethodDecl::param_iterator P = setterMethod->param_begin();
1331  ParmVarDecl *Param = (*P);
1332  QualType T = Param->getType().getNonReferenceType();
1333  DeclRefExpr *rhs = new (Context) DeclRefExpr(Param, false, T,
1334  VK_LValue, PropertyDiagLoc);
1335  MarkDeclRefReferenced(rhs);
1336  ExprResult Res = BuildBinOp(S, PropertyDiagLoc,
1337  BO_Assign, lhs, rhs);
1338  if (property->getPropertyAttributes() &
1340  Expr *callExpr = Res.getAs<Expr>();
1341  if (const CXXOperatorCallExpr *CXXCE =
1342  dyn_cast_or_null<CXXOperatorCallExpr>(callExpr))
1343  if (const FunctionDecl *FuncDecl = CXXCE->getDirectCallee())
1344  if (!FuncDecl->isTrivial())
1345  if (property->getType()->isReferenceType()) {
1346  Diag(PropertyDiagLoc,
1347  diag::err_atomic_property_nontrivial_assign_op)
1348  << property->getType();
1349  Diag(FuncDecl->getLocStart(),
1350  diag::note_callee_decl) << FuncDecl;
1351  }
1352  }
1353  PIDecl->setSetterCXXAssignment(Res.getAs<Expr>());
1354  }
1355  }
1356 
1357  if (IC) {
1358  if (Synthesize)
1359  if (ObjCPropertyImplDecl *PPIDecl =
1360  IC->FindPropertyImplIvarDecl(PropertyIvar)) {
1361  Diag(PropertyLoc, diag::err_duplicate_ivar_use)
1362  << PropertyId << PPIDecl->getPropertyDecl()->getIdentifier()
1363  << PropertyIvar;
1364  Diag(PPIDecl->getLocation(), diag::note_previous_use);
1365  }
1366 
1367  if (ObjCPropertyImplDecl *PPIDecl
1368  = IC->FindPropertyImplDecl(PropertyId, QueryKind)) {
1369  Diag(PropertyLoc, diag::err_property_implemented) << PropertyId;
1370  Diag(PPIDecl->getLocation(), diag::note_previous_declaration);
1371  return nullptr;
1372  }
1373  IC->addPropertyImplementation(PIDecl);
1374  if (getLangOpts().ObjCDefaultSynthProperties &&
1376  !IDecl->isObjCRequiresPropertyDefs()) {
1377  // Diagnose if an ivar was lazily synthesdized due to a previous
1378  // use and if 1) property is @dynamic or 2) property is synthesized
1379  // but it requires an ivar of different name.
1380  ObjCInterfaceDecl *ClassDeclared=nullptr;
1381  ObjCIvarDecl *Ivar = nullptr;
1382  if (!Synthesize)
1383  Ivar = IDecl->lookupInstanceVariable(PropertyId, ClassDeclared);
1384  else {
1385  if (PropertyIvar && PropertyIvar != PropertyId)
1386  Ivar = IDecl->lookupInstanceVariable(PropertyId, ClassDeclared);
1387  }
1388  // Issue diagnostics only if Ivar belongs to current class.
1389  if (Ivar && Ivar->getSynthesize() &&
1390  declaresSameEntity(IC->getClassInterface(), ClassDeclared)) {
1391  Diag(Ivar->getLocation(), diag::err_undeclared_var_use)
1392  << PropertyId;
1393  Ivar->setInvalidDecl();
1394  }
1395  }
1396  } else {
1397  if (Synthesize)
1398  if (ObjCPropertyImplDecl *PPIDecl =
1399  CatImplClass->FindPropertyImplIvarDecl(PropertyIvar)) {
1400  Diag(PropertyDiagLoc, diag::err_duplicate_ivar_use)
1401  << PropertyId << PPIDecl->getPropertyDecl()->getIdentifier()
1402  << PropertyIvar;
1403  Diag(PPIDecl->getLocation(), diag::note_previous_use);
1404  }
1405 
1406  if (ObjCPropertyImplDecl *PPIDecl =
1407  CatImplClass->FindPropertyImplDecl(PropertyId, QueryKind)) {
1408  Diag(PropertyDiagLoc, diag::err_property_implemented) << PropertyId;
1409  Diag(PPIDecl->getLocation(), diag::note_previous_declaration);
1410  return nullptr;
1411  }
1412  CatImplClass->addPropertyImplementation(PIDecl);
1413  }
1414 
1415  return PIDecl;
1416 }
1417 
1418 //===----------------------------------------------------------------------===//
1419 // Helper methods.
1420 //===----------------------------------------------------------------------===//
1421 
1422 /// DiagnosePropertyMismatch - Compares two properties for their
1423 /// attributes and types and warns on a variety of inconsistencies.
1424 ///
1425 void
1427  ObjCPropertyDecl *SuperProperty,
1428  const IdentifierInfo *inheritedName,
1429  bool OverridingProtocolProperty) {
1431  Property->getPropertyAttributes();
1433  SuperProperty->getPropertyAttributes();
1434 
1435  // We allow readonly properties without an explicit ownership
1436  // (assign/unsafe_unretained/weak/retain/strong/copy) in super class
1437  // to be overridden by a property with any explicit ownership in the subclass.
1438  if (!OverridingProtocolProperty &&
1439  !getOwnershipRule(SAttr) && getOwnershipRule(CAttr))
1440  ;
1441  else {
1444  Diag(Property->getLocation(), diag::warn_readonly_property)
1445  << Property->getDeclName() << inheritedName;
1446  if ((CAttr & ObjCPropertyDecl::OBJC_PR_copy)
1447  != (SAttr & ObjCPropertyDecl::OBJC_PR_copy))
1448  Diag(Property->getLocation(), diag::warn_property_attribute)
1449  << Property->getDeclName() << "copy" << inheritedName;
1450  else if (!(SAttr & ObjCPropertyDecl::OBJC_PR_readonly)){
1451  unsigned CAttrRetain =
1452  (CAttr &
1454  unsigned SAttrRetain =
1455  (SAttr &
1457  bool CStrong = (CAttrRetain != 0);
1458  bool SStrong = (SAttrRetain != 0);
1459  if (CStrong != SStrong)
1460  Diag(Property->getLocation(), diag::warn_property_attribute)
1461  << Property->getDeclName() << "retain (or strong)" << inheritedName;
1462  }
1463  }
1464 
1465  // Check for nonatomic; note that nonatomic is effectively
1466  // meaningless for readonly properties, so don't diagnose if the
1467  // atomic property is 'readonly'.
1468  checkAtomicPropertyMismatch(*this, SuperProperty, Property, false);
1469  if (Property->getSetterName() != SuperProperty->getSetterName()) {
1470  Diag(Property->getLocation(), diag::warn_property_attribute)
1471  << Property->getDeclName() << "setter" << inheritedName;
1472  Diag(SuperProperty->getLocation(), diag::note_property_declare);
1473  }
1474  if (Property->getGetterName() != SuperProperty->getGetterName()) {
1475  Diag(Property->getLocation(), diag::warn_property_attribute)
1476  << Property->getDeclName() << "getter" << inheritedName;
1477  Diag(SuperProperty->getLocation(), diag::note_property_declare);
1478  }
1479 
1480  QualType LHSType =
1481  Context.getCanonicalType(SuperProperty->getType());
1482  QualType RHSType =
1483  Context.getCanonicalType(Property->getType());
1484 
1485  if (!Context.propertyTypesAreCompatible(LHSType, RHSType)) {
1486  // Do cases not handled in above.
1487  // FIXME. For future support of covariant property types, revisit this.
1488  bool IncompatibleObjC = false;
1489  QualType ConvertedType;
1490  if (!isObjCPointerConversion(RHSType, LHSType,
1491  ConvertedType, IncompatibleObjC) ||
1492  IncompatibleObjC) {
1493  Diag(Property->getLocation(), diag::warn_property_types_are_incompatible)
1494  << Property->getType() << SuperProperty->getType() << inheritedName;
1495  Diag(SuperProperty->getLocation(), diag::note_property_declare);
1496  }
1497  }
1498 }
1499 
1501  ObjCMethodDecl *GetterMethod,
1502  SourceLocation Loc) {
1503  if (!GetterMethod)
1504  return false;
1505  QualType GetterType = GetterMethod->getReturnType().getNonReferenceType();
1506  QualType PropertyRValueType =
1507  property->getType().getNonReferenceType().getAtomicUnqualifiedType();
1508  bool compat = Context.hasSameType(PropertyRValueType, GetterType);
1509  if (!compat) {
1510  const ObjCObjectPointerType *propertyObjCPtr = nullptr;
1511  const ObjCObjectPointerType *getterObjCPtr = nullptr;
1512  if ((propertyObjCPtr =
1513  PropertyRValueType->getAs<ObjCObjectPointerType>()) &&
1514  (getterObjCPtr = GetterType->getAs<ObjCObjectPointerType>()))
1515  compat = Context.canAssignObjCInterfaces(getterObjCPtr, propertyObjCPtr);
1516  else if (CheckAssignmentConstraints(Loc, GetterType, PropertyRValueType)
1517  != Compatible) {
1518  Diag(Loc, diag::err_property_accessor_type)
1519  << property->getDeclName() << PropertyRValueType
1520  << GetterMethod->getSelector() << GetterType;
1521  Diag(GetterMethod->getLocation(), diag::note_declared_at);
1522  return true;
1523  } else {
1524  compat = true;
1525  QualType lhsType = Context.getCanonicalType(PropertyRValueType);
1526  QualType rhsType =Context.getCanonicalType(GetterType).getUnqualifiedType();
1527  if (lhsType != rhsType && lhsType->isArithmeticType())
1528  compat = false;
1529  }
1530  }
1531 
1532  if (!compat) {
1533  Diag(Loc, diag::warn_accessor_property_type_mismatch)
1534  << property->getDeclName()
1535  << GetterMethod->getSelector();
1536  Diag(GetterMethod->getLocation(), diag::note_declared_at);
1537  return true;
1538  }
1539 
1540  return false;
1541 }
1542 
1543 /// CollectImmediateProperties - This routine collects all properties in
1544 /// the class and its conforming protocols; but not those in its super class.
1545 static void
1548  ObjCContainerDecl::PropertyMap &SuperPropMap,
1549  bool CollectClassPropsOnly = false,
1550  bool IncludeProtocols = true) {
1551  if (ObjCInterfaceDecl *IDecl = dyn_cast<ObjCInterfaceDecl>(CDecl)) {
1552  for (auto *Prop : IDecl->properties()) {
1553  if (CollectClassPropsOnly && !Prop->isClassProperty())
1554  continue;
1555  PropMap[std::make_pair(Prop->getIdentifier(), Prop->isClassProperty())] =
1556  Prop;
1557  }
1558 
1559  // Collect the properties from visible extensions.
1560  for (auto *Ext : IDecl->visible_extensions())
1561  CollectImmediateProperties(Ext, PropMap, SuperPropMap,
1562  CollectClassPropsOnly, IncludeProtocols);
1563 
1564  if (IncludeProtocols) {
1565  // Scan through class's protocols.
1566  for (auto *PI : IDecl->all_referenced_protocols())
1567  CollectImmediateProperties(PI, PropMap, SuperPropMap,
1568  CollectClassPropsOnly);
1569  }
1570  }
1571  if (ObjCCategoryDecl *CATDecl = dyn_cast<ObjCCategoryDecl>(CDecl)) {
1572  for (auto *Prop : CATDecl->properties()) {
1573  if (CollectClassPropsOnly && !Prop->isClassProperty())
1574  continue;
1575  PropMap[std::make_pair(Prop->getIdentifier(), Prop->isClassProperty())] =
1576  Prop;
1577  }
1578  if (IncludeProtocols) {
1579  // Scan through class's protocols.
1580  for (auto *PI : CATDecl->protocols())
1581  CollectImmediateProperties(PI, PropMap, SuperPropMap,
1582  CollectClassPropsOnly);
1583  }
1584  }
1585  else if (ObjCProtocolDecl *PDecl = dyn_cast<ObjCProtocolDecl>(CDecl)) {
1586  for (auto *Prop : PDecl->properties()) {
1587  if (CollectClassPropsOnly && !Prop->isClassProperty())
1588  continue;
1589  ObjCPropertyDecl *PropertyFromSuper =
1590  SuperPropMap[std::make_pair(Prop->getIdentifier(),
1591  Prop->isClassProperty())];
1592  // Exclude property for protocols which conform to class's super-class,
1593  // as super-class has to implement the property.
1594  if (!PropertyFromSuper ||
1595  PropertyFromSuper->getIdentifier() != Prop->getIdentifier()) {
1596  ObjCPropertyDecl *&PropEntry =
1597  PropMap[std::make_pair(Prop->getIdentifier(),
1598  Prop->isClassProperty())];
1599  if (!PropEntry)
1600  PropEntry = Prop;
1601  }
1602  }
1603  // Scan through protocol's protocols.
1604  for (auto *PI : PDecl->protocols())
1605  CollectImmediateProperties(PI, PropMap, SuperPropMap,
1606  CollectClassPropsOnly);
1607  }
1608 }
1609 
1610 /// CollectSuperClassPropertyImplementations - This routine collects list of
1611 /// properties to be implemented in super class(s) and also coming from their
1612 /// conforming protocols.
1614  ObjCInterfaceDecl::PropertyMap &PropMap) {
1615  if (ObjCInterfaceDecl *SDecl = CDecl->getSuperClass()) {
1617  while (SDecl) {
1618  SDecl->collectPropertiesToImplement(PropMap, PO);
1619  SDecl = SDecl->getSuperClass();
1620  }
1621  }
1622 }
1623 
1624 /// IvarBacksCurrentMethodAccessor - This routine returns 'true' if 'IV' is
1625 /// an ivar synthesized for 'Method' and 'Method' is a property accessor
1626 /// declared in class 'IFace'.
1627 bool
1629  ObjCMethodDecl *Method, ObjCIvarDecl *IV) {
1630  if (!IV->getSynthesize())
1631  return false;
1632  ObjCMethodDecl *IMD = IFace->lookupMethod(Method->getSelector(),
1633  Method->isInstanceMethod());
1634  if (!IMD || !IMD->isPropertyAccessor())
1635  return false;
1636 
1637  // look up a property declaration whose one of its accessors is implemented
1638  // by this method.
1639  for (const auto *Property : IFace->instance_properties()) {
1640  if ((Property->getGetterName() == IMD->getSelector() ||
1641  Property->getSetterName() == IMD->getSelector()) &&
1642  (Property->getPropertyIvarDecl() == IV))
1643  return true;
1644  }
1645  // Also look up property declaration in class extension whose one of its
1646  // accessors is implemented by this method.
1647  for (const auto *Ext : IFace->known_extensions())
1648  for (const auto *Property : Ext->instance_properties())
1649  if ((Property->getGetterName() == IMD->getSelector() ||
1650  Property->getSetterName() == IMD->getSelector()) &&
1651  (Property->getPropertyIvarDecl() == IV))
1652  return true;
1653  return false;
1654 }
1655 
1657  ObjCPropertyDecl *Prop) {
1658  bool SuperClassImplementsGetter = false;
1659  bool SuperClassImplementsSetter = false;
1661  SuperClassImplementsSetter = true;
1662 
1663  while (IDecl->getSuperClass()) {
1664  ObjCInterfaceDecl *SDecl = IDecl->getSuperClass();
1665  if (!SuperClassImplementsGetter && SDecl->getInstanceMethod(Prop->getGetterName()))
1666  SuperClassImplementsGetter = true;
1667 
1668  if (!SuperClassImplementsSetter && SDecl->getInstanceMethod(Prop->getSetterName()))
1669  SuperClassImplementsSetter = true;
1670  if (SuperClassImplementsGetter && SuperClassImplementsSetter)
1671  return true;
1672  IDecl = IDecl->getSuperClass();
1673  }
1674  return false;
1675 }
1676 
1677 /// \brief Default synthesizes all properties which must be synthesized
1678 /// in class's \@implementation.
1680  ObjCInterfaceDecl *IDecl) {
1683  IDecl->collectPropertiesToImplement(PropMap, PropertyOrder);
1684  if (PropMap.empty())
1685  return;
1686  ObjCInterfaceDecl::PropertyMap SuperPropMap;
1687  CollectSuperClassPropertyImplementations(IDecl, SuperPropMap);
1688 
1689  for (unsigned i = 0, e = PropertyOrder.size(); i != e; i++) {
1690  ObjCPropertyDecl *Prop = PropertyOrder[i];
1691  // Is there a matching property synthesize/dynamic?
1692  if (Prop->isInvalidDecl() ||
1693  Prop->isClassProperty() ||
1695  continue;
1696  // Property may have been synthesized by user.
1697  if (IMPDecl->FindPropertyImplDecl(
1698  Prop->getIdentifier(), Prop->getQueryKind()))
1699  continue;
1700  if (IMPDecl->getInstanceMethod(Prop->getGetterName())) {
1702  continue;
1703  if (IMPDecl->getInstanceMethod(Prop->getSetterName()))
1704  continue;
1705  }
1706  if (ObjCPropertyImplDecl *PID =
1707  IMPDecl->FindPropertyImplIvarDecl(Prop->getIdentifier())) {
1708  Diag(Prop->getLocation(), diag::warn_no_autosynthesis_shared_ivar_property)
1709  << Prop->getIdentifier();
1710  if (PID->getLocation().isValid())
1711  Diag(PID->getLocation(), diag::note_property_synthesize);
1712  continue;
1713  }
1714  ObjCPropertyDecl *PropInSuperClass =
1715  SuperPropMap[std::make_pair(Prop->getIdentifier(),
1716  Prop->isClassProperty())];
1717  if (ObjCProtocolDecl *Proto =
1718  dyn_cast<ObjCProtocolDecl>(Prop->getDeclContext())) {
1719  // We won't auto-synthesize properties declared in protocols.
1720  // Suppress the warning if class's superclass implements property's
1721  // getter and implements property's setter (if readwrite property).
1722  // Or, if property is going to be implemented in its super class.
1723  if (!SuperClassImplementsProperty(IDecl, Prop) && !PropInSuperClass) {
1724  Diag(IMPDecl->getLocation(),
1725  diag::warn_auto_synthesizing_protocol_property)
1726  << Prop << Proto;
1727  Diag(Prop->getLocation(), diag::note_property_declare);
1728  }
1729  continue;
1730  }
1731  // If property to be implemented in the super class, ignore.
1732  if (PropInSuperClass) {
1734  (PropInSuperClass->getPropertyAttributes() &
1736  !IMPDecl->getInstanceMethod(Prop->getSetterName()) &&
1737  !IDecl->HasUserDeclaredSetterMethod(Prop)) {
1738  Diag(Prop->getLocation(), diag::warn_no_autosynthesis_property)
1739  << Prop->getIdentifier();
1740  Diag(PropInSuperClass->getLocation(), diag::note_property_declare);
1741  }
1742  else {
1743  Diag(Prop->getLocation(), diag::warn_autosynthesis_property_in_superclass)
1744  << Prop->getIdentifier();
1745  Diag(PropInSuperClass->getLocation(), diag::note_property_declare);
1746  Diag(IMPDecl->getLocation(), diag::note_while_in_implementation);
1747  }
1748  continue;
1749  }
1750  // We use invalid SourceLocations for the synthesized ivars since they
1751  // aren't really synthesized at a particular location; they just exist.
1752  // Saying that they are located at the @implementation isn't really going
1753  // to help users.
1754  ObjCPropertyImplDecl *PIDecl = dyn_cast_or_null<ObjCPropertyImplDecl>(
1756  true,
1757  /* property = */ Prop->getIdentifier(),
1758  /* ivar = */ Prop->getDefaultSynthIvarName(Context),
1759  Prop->getLocation(), Prop->getQueryKind()));
1760  if (PIDecl) {
1761  Diag(Prop->getLocation(), diag::warn_missing_explicit_synthesis);
1762  Diag(IMPDecl->getLocation(), diag::note_while_in_implementation);
1763  }
1764  }
1765 }
1766 
1768  if (!LangOpts.ObjCDefaultSynthProperties || LangOpts.ObjCRuntime.isFragile())
1769  return;
1770  ObjCImplementationDecl *IC=dyn_cast_or_null<ObjCImplementationDecl>(D);
1771  if (!IC)
1772  return;
1773  if (ObjCInterfaceDecl* IDecl = IC->getClassInterface())
1774  if (!IDecl->isObjCRequiresPropertyDefs())
1775  DefaultSynthesizeProperties(S, IC, IDecl);
1776 }
1777 
1779  Sema &S, ObjCInterfaceDecl *PrimaryClass, Selector Method,
1780  ObjCImplDecl *IMPDecl, ObjCContainerDecl *CDecl, ObjCCategoryDecl *C,
1781  ObjCPropertyDecl *Prop,
1782  llvm::SmallPtrSet<const ObjCMethodDecl *, 8> &SMap) {
1783  // Check to see if we have a corresponding selector in SMap and with the
1784  // right method type.
1785  auto I = std::find_if(SMap.begin(), SMap.end(),
1786  [&](const ObjCMethodDecl *x) {
1787  return x->getSelector() == Method &&
1788  x->isClassMethod() == Prop->isClassProperty();
1789  });
1790  // When reporting on missing property setter/getter implementation in
1791  // categories, do not report when they are declared in primary class,
1792  // class's protocol, or one of it super classes. This is because,
1793  // the class is going to implement them.
1794  if (I == SMap.end() &&
1795  (PrimaryClass == nullptr ||
1796  !PrimaryClass->lookupPropertyAccessor(Method, C,
1797  Prop->isClassProperty()))) {
1798  unsigned diag =
1799  isa<ObjCCategoryDecl>(CDecl)
1800  ? (Prop->isClassProperty()
1801  ? diag::warn_impl_required_in_category_for_class_property
1802  : diag::warn_setter_getter_impl_required_in_category)
1803  : (Prop->isClassProperty()
1804  ? diag::warn_impl_required_for_class_property
1805  : diag::warn_setter_getter_impl_required);
1806  S.Diag(IMPDecl->getLocation(), diag) << Prop->getDeclName() << Method;
1807  S.Diag(Prop->getLocation(), diag::note_property_declare);
1808  if (S.LangOpts.ObjCDefaultSynthProperties &&
1810  if (ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(CDecl))
1811  if (const ObjCInterfaceDecl *RID = ID->isObjCRequiresPropertyDefs())
1812  S.Diag(RID->getLocation(), diag::note_suppressed_class_declare);
1813  }
1814 }
1815 
1817  ObjCContainerDecl *CDecl,
1818  bool SynthesizeProperties) {
1820  ObjCInterfaceDecl *IDecl = dyn_cast<ObjCInterfaceDecl>(CDecl);
1821 
1822  // Since we don't synthesize class properties, we should emit diagnose even
1823  // if SynthesizeProperties is true.
1824  ObjCContainerDecl::PropertyMap NoNeedToImplPropMap;
1825  // Gather properties which need not be implemented in this class
1826  // or category.
1827  if (!IDecl)
1828  if (ObjCCategoryDecl *C = dyn_cast<ObjCCategoryDecl>(CDecl)) {
1829  // For categories, no need to implement properties declared in
1830  // its primary class (and its super classes) if property is
1831  // declared in one of those containers.
1832  if ((IDecl = C->getClassInterface())) {
1834  IDecl->collectPropertiesToImplement(NoNeedToImplPropMap, PO);
1835  }
1836  }
1837  if (IDecl)
1838  CollectSuperClassPropertyImplementations(IDecl, NoNeedToImplPropMap);
1839 
1840  // When SynthesizeProperties is true, we only check class properties.
1841  CollectImmediateProperties(CDecl, PropMap, NoNeedToImplPropMap,
1842  SynthesizeProperties/*CollectClassPropsOnly*/);
1843 
1844  // Scan the @interface to see if any of the protocols it adopts
1845  // require an explicit implementation, via attribute
1846  // 'objc_protocol_requires_explicit_implementation'.
1847  if (IDecl) {
1848  std::unique_ptr<ObjCContainerDecl::PropertyMap> LazyMap;
1849 
1850  for (auto *PDecl : IDecl->all_referenced_protocols()) {
1851  if (!PDecl->hasAttr<ObjCExplicitProtocolImplAttr>())
1852  continue;
1853  // Lazily construct a set of all the properties in the @interface
1854  // of the class, without looking at the superclass. We cannot
1855  // use the call to CollectImmediateProperties() above as that
1856  // utilizes information from the super class's properties as well
1857  // as scans the adopted protocols. This work only triggers for protocols
1858  // with the attribute, which is very rare, and only occurs when
1859  // analyzing the @implementation.
1860  if (!LazyMap) {
1861  ObjCContainerDecl::PropertyMap NoNeedToImplPropMap;
1862  LazyMap.reset(new ObjCContainerDecl::PropertyMap());
1863  CollectImmediateProperties(CDecl, *LazyMap, NoNeedToImplPropMap,
1864  /* CollectClassPropsOnly */ false,
1865  /* IncludeProtocols */ false);
1866  }
1867  // Add the properties of 'PDecl' to the list of properties that
1868  // need to be implemented.
1869  for (auto *PropDecl : PDecl->properties()) {
1870  if ((*LazyMap)[std::make_pair(PropDecl->getIdentifier(),
1871  PropDecl->isClassProperty())])
1872  continue;
1873  PropMap[std::make_pair(PropDecl->getIdentifier(),
1874  PropDecl->isClassProperty())] = PropDecl;
1875  }
1876  }
1877  }
1878 
1879  if (PropMap.empty())
1880  return;
1881 
1883  for (const auto *I : IMPDecl->property_impls())
1884  PropImplMap.insert(I->getPropertyDecl());
1885 
1886  llvm::SmallPtrSet<const ObjCMethodDecl *, 8> InsMap;
1887  // Collect property accessors implemented in current implementation.
1888  for (const auto *I : IMPDecl->methods())
1889  InsMap.insert(I);
1890 
1891  ObjCCategoryDecl *C = dyn_cast<ObjCCategoryDecl>(CDecl);
1892  ObjCInterfaceDecl *PrimaryClass = nullptr;
1893  if (C && !C->IsClassExtension())
1894  if ((PrimaryClass = C->getClassInterface()))
1895  // Report unimplemented properties in the category as well.
1896  if (ObjCImplDecl *IMP = PrimaryClass->getImplementation()) {
1897  // When reporting on missing setter/getters, do not report when
1898  // setter/getter is implemented in category's primary class
1899  // implementation.
1900  for (const auto *I : IMP->methods())
1901  InsMap.insert(I);
1902  }
1903 
1904  for (ObjCContainerDecl::PropertyMap::iterator
1905  P = PropMap.begin(), E = PropMap.end(); P != E; ++P) {
1906  ObjCPropertyDecl *Prop = P->second;
1907  // Is there a matching property synthesize/dynamic?
1908  if (Prop->isInvalidDecl() ||
1910  PropImplMap.count(Prop) ||
1911  Prop->getAvailability() == AR_Unavailable)
1912  continue;
1913 
1914  // Diagnose unimplemented getters and setters.
1916  PrimaryClass, Prop->getGetterName(), IMPDecl, CDecl, C, Prop, InsMap);
1917  if (!Prop->isReadOnly())
1919  PrimaryClass, Prop->getSetterName(),
1920  IMPDecl, CDecl, C, Prop, InsMap);
1921  }
1922 }
1923 
1925  for (const auto *propertyImpl : impDecl->property_impls()) {
1926  const auto *property = propertyImpl->getPropertyDecl();
1927 
1928  // Warn about null_resettable properties with synthesized setters,
1929  // because the setter won't properly handle nil.
1930  if (propertyImpl->getPropertyImplementation()
1932  (property->getPropertyAttributes() &
1934  property->getGetterMethodDecl() &&
1935  property->getSetterMethodDecl()) {
1936  auto *getterMethod = property->getGetterMethodDecl();
1937  auto *setterMethod = property->getSetterMethodDecl();
1938  if (!impDecl->getInstanceMethod(setterMethod->getSelector()) &&
1939  !impDecl->getInstanceMethod(getterMethod->getSelector())) {
1940  SourceLocation loc = propertyImpl->getLocation();
1941  if (loc.isInvalid())
1942  loc = impDecl->getLocStart();
1943 
1944  Diag(loc, diag::warn_null_resettable_setter)
1945  << setterMethod->getSelector() << property->getDeclName();
1946  }
1947  }
1948  }
1949 }
1950 
1951 void
1953  ObjCInterfaceDecl* IDecl) {
1954  // Rules apply in non-GC mode only
1955  if (getLangOpts().getGC() != LangOptions::NonGC)
1956  return;
1958  for (auto *Prop : IDecl->properties())
1959  PM[std::make_pair(Prop->getIdentifier(), Prop->isClassProperty())] = Prop;
1960  for (const auto *Ext : IDecl->known_extensions())
1961  for (auto *Prop : Ext->properties())
1962  PM[std::make_pair(Prop->getIdentifier(), Prop->isClassProperty())] = Prop;
1963 
1964  for (ObjCContainerDecl::PropertyMap::iterator I = PM.begin(), E = PM.end();
1965  I != E; ++I) {
1966  const ObjCPropertyDecl *Property = I->second;
1967  ObjCMethodDecl *GetterMethod = nullptr;
1968  ObjCMethodDecl *SetterMethod = nullptr;
1969  bool LookedUpGetterSetter = false;
1970 
1971  unsigned Attributes = Property->getPropertyAttributes();
1972  unsigned AttributesAsWritten = Property->getPropertyAttributesAsWritten();
1973 
1974  if (!(AttributesAsWritten & ObjCPropertyDecl::OBJC_PR_atomic) &&
1975  !(AttributesAsWritten & ObjCPropertyDecl::OBJC_PR_nonatomic)) {
1976  GetterMethod = Property->isClassProperty() ?
1977  IMPDecl->getClassMethod(Property->getGetterName()) :
1978  IMPDecl->getInstanceMethod(Property->getGetterName());
1979  SetterMethod = Property->isClassProperty() ?
1980  IMPDecl->getClassMethod(Property->getSetterName()) :
1981  IMPDecl->getInstanceMethod(Property->getSetterName());
1982  LookedUpGetterSetter = true;
1983  if (GetterMethod) {
1984  Diag(GetterMethod->getLocation(),
1985  diag::warn_default_atomic_custom_getter_setter)
1986  << Property->getIdentifier() << 0;
1987  Diag(Property->getLocation(), diag::note_property_declare);
1988  }
1989  if (SetterMethod) {
1990  Diag(SetterMethod->getLocation(),
1991  diag::warn_default_atomic_custom_getter_setter)
1992  << Property->getIdentifier() << 1;
1993  Diag(Property->getLocation(), diag::note_property_declare);
1994  }
1995  }
1996 
1997  // We only care about readwrite atomic property.
1998  if ((Attributes & ObjCPropertyDecl::OBJC_PR_nonatomic) ||
1999  !(Attributes & ObjCPropertyDecl::OBJC_PR_readwrite))
2000  continue;
2001  if (const ObjCPropertyImplDecl *PIDecl = IMPDecl->FindPropertyImplDecl(
2002  Property->getIdentifier(), Property->getQueryKind())) {
2003  if (PIDecl->getPropertyImplementation() == ObjCPropertyImplDecl::Dynamic)
2004  continue;
2005  if (!LookedUpGetterSetter) {
2006  GetterMethod = Property->isClassProperty() ?
2007  IMPDecl->getClassMethod(Property->getGetterName()) :
2008  IMPDecl->getInstanceMethod(Property->getGetterName());
2009  SetterMethod = Property->isClassProperty() ?
2010  IMPDecl->getClassMethod(Property->getSetterName()) :
2011  IMPDecl->getInstanceMethod(Property->getSetterName());
2012  }
2013  if ((GetterMethod && !SetterMethod) || (!GetterMethod && SetterMethod)) {
2014  SourceLocation MethodLoc =
2015  (GetterMethod ? GetterMethod->getLocation()
2016  : SetterMethod->getLocation());
2017  Diag(MethodLoc, diag::warn_atomic_property_rule)
2018  << Property->getIdentifier() << (GetterMethod != nullptr)
2019  << (SetterMethod != nullptr);
2020  // fixit stuff.
2021  if (Property->getLParenLoc().isValid() &&
2022  !(AttributesAsWritten & ObjCPropertyDecl::OBJC_PR_atomic)) {
2023  // @property () ... case.
2024  SourceLocation AfterLParen =
2025  getLocForEndOfToken(Property->getLParenLoc());
2026  StringRef NonatomicStr = AttributesAsWritten? "nonatomic, "
2027  : "nonatomic";
2028  Diag(Property->getLocation(),
2029  diag::note_atomic_property_fixup_suggest)
2030  << FixItHint::CreateInsertion(AfterLParen, NonatomicStr);
2031  } else if (Property->getLParenLoc().isInvalid()) {
2032  //@property id etc.
2033  SourceLocation startLoc =
2034  Property->getTypeSourceInfo()->getTypeLoc().getBeginLoc();
2035  Diag(Property->getLocation(),
2036  diag::note_atomic_property_fixup_suggest)
2037  << FixItHint::CreateInsertion(startLoc, "(nonatomic) ");
2038  }
2039  else
2040  Diag(MethodLoc, diag::note_atomic_property_fixup_suggest);
2041  Diag(Property->getLocation(), diag::note_property_declare);
2042  }
2043  }
2044  }
2045 }
2046 
2048  if (getLangOpts().getGC() == LangOptions::GCOnly)
2049  return;
2050 
2051  for (const auto *PID : D->property_impls()) {
2052  const ObjCPropertyDecl *PD = PID->getPropertyDecl();
2053  if (PD && !PD->hasAttr<NSReturnsNotRetainedAttr>() &&
2054  !PD->isClassProperty() &&
2055  !D->getInstanceMethod(PD->getGetterName())) {
2056  ObjCMethodDecl *method = PD->getGetterMethodDecl();
2057  if (!method)
2058  continue;
2059  ObjCMethodFamily family = method->getMethodFamily();
2060  if (family == OMF_alloc || family == OMF_copy ||
2061  family == OMF_mutableCopy || family == OMF_new) {
2062  if (getLangOpts().ObjCAutoRefCount)
2063  Diag(PD->getLocation(), diag::err_cocoa_naming_owned_rule);
2064  else
2065  Diag(PD->getLocation(), diag::warn_cocoa_naming_owned_rule);
2066 
2067  // Look for a getter explicitly declared alongside the property.
2068  // If we find one, use its location for the note.
2069  SourceLocation noteLoc = PD->getLocation();
2070  SourceLocation fixItLoc;
2071  for (auto *getterRedecl : method->redecls()) {
2072  if (getterRedecl->isImplicit())
2073  continue;
2074  if (getterRedecl->getDeclContext() != PD->getDeclContext())
2075  continue;
2076  noteLoc = getterRedecl->getLocation();
2077  fixItLoc = getterRedecl->getLocEnd();
2078  }
2079 
2081  TokenValue tokens[] = {
2082  tok::kw___attribute, tok::l_paren, tok::l_paren,
2083  PP.getIdentifierInfo("objc_method_family"), tok::l_paren,
2084  PP.getIdentifierInfo("none"), tok::r_paren,
2085  tok::r_paren, tok::r_paren
2086  };
2087  StringRef spelling = "__attribute__((objc_method_family(none)))";
2088  StringRef macroName = PP.getLastMacroWithSpelling(noteLoc, tokens);
2089  if (!macroName.empty())
2090  spelling = macroName;
2091 
2092  auto noteDiag = Diag(noteLoc, diag::note_cocoa_naming_declare_family)
2093  << method->getDeclName() << spelling;
2094  if (fixItLoc.isValid()) {
2095  SmallString<64> fixItText(" ");
2096  fixItText += spelling;
2097  noteDiag << FixItHint::CreateInsertion(fixItLoc, fixItText);
2098  }
2099  }
2100  }
2101  }
2102 }
2103 
2105  const ObjCImplementationDecl *ImplD,
2106  const ObjCInterfaceDecl *IFD) {
2107  assert(IFD->hasDesignatedInitializers());
2108  const ObjCInterfaceDecl *SuperD = IFD->getSuperClass();
2109  if (!SuperD)
2110  return;
2111 
2112  SelectorSet InitSelSet;
2113  for (const auto *I : ImplD->instance_methods())
2114  if (I->getMethodFamily() == OMF_init)
2115  InitSelSet.insert(I->getSelector());
2116 
2118  SuperD->getDesignatedInitializers(DesignatedInits);
2120  I = DesignatedInits.begin(), E = DesignatedInits.end(); I != E; ++I) {
2121  const ObjCMethodDecl *MD = *I;
2122  if (!InitSelSet.count(MD->getSelector())) {
2123  bool Ignore = false;
2124  if (auto *IMD = IFD->getInstanceMethod(MD->getSelector())) {
2125  Ignore = IMD->isUnavailable();
2126  }
2127  if (!Ignore) {
2128  Diag(ImplD->getLocation(),
2129  diag::warn_objc_implementation_missing_designated_init_override)
2130  << MD->getSelector();
2131  Diag(MD->getLocation(), diag::note_objc_designated_init_marked_here);
2132  }
2133  }
2134  }
2135 }
2136 
2137 /// AddPropertyAttrs - Propagates attributes from a property to the
2138 /// implicitly-declared getter or setter for that property.
2139 static void AddPropertyAttrs(Sema &S, ObjCMethodDecl *PropertyMethod,
2141  // Should we just clone all attributes over?
2142  for (const auto *A : Property->attrs()) {
2143  if (isa<DeprecatedAttr>(A) ||
2144  isa<UnavailableAttr>(A) ||
2145  isa<AvailabilityAttr>(A))
2146  PropertyMethod->addAttr(A->clone(S.Context));
2147  }
2148 }
2149 
2150 /// ProcessPropertyDecl - Make sure that any user-defined setter/getter methods
2151 /// have the property type and issue diagnostics if they don't.
2152 /// Also synthesize a getter/setter method if none exist (and update the
2153 /// appropriate lookup tables.
2155  ObjCMethodDecl *GetterMethod, *SetterMethod;
2156  ObjCContainerDecl *CD = cast<ObjCContainerDecl>(property->getDeclContext());
2157  if (CD->isInvalidDecl())
2158  return;
2159 
2160  bool IsClassProperty = property->isClassProperty();
2161  GetterMethod = IsClassProperty ?
2162  CD->getClassMethod(property->getGetterName()) :
2163  CD->getInstanceMethod(property->getGetterName());
2164 
2165  // if setter or getter is not found in class extension, it might be
2166  // in the primary class.
2167  if (!GetterMethod)
2168  if (const ObjCCategoryDecl *CatDecl = dyn_cast<ObjCCategoryDecl>(CD))
2169  if (CatDecl->IsClassExtension())
2170  GetterMethod = IsClassProperty ? CatDecl->getClassInterface()->
2171  getClassMethod(property->getGetterName()) :
2172  CatDecl->getClassInterface()->
2173  getInstanceMethod(property->getGetterName());
2174 
2175  SetterMethod = IsClassProperty ?
2176  CD->getClassMethod(property->getSetterName()) :
2177  CD->getInstanceMethod(property->getSetterName());
2178  if (!SetterMethod)
2179  if (const ObjCCategoryDecl *CatDecl = dyn_cast<ObjCCategoryDecl>(CD))
2180  if (CatDecl->IsClassExtension())
2181  SetterMethod = IsClassProperty ? CatDecl->getClassInterface()->
2182  getClassMethod(property->getSetterName()) :
2183  CatDecl->getClassInterface()->
2184  getInstanceMethod(property->getSetterName());
2185  DiagnosePropertyAccessorMismatch(property, GetterMethod,
2186  property->getLocation());
2187 
2188  if (!property->isReadOnly() && SetterMethod) {
2189  if (Context.getCanonicalType(SetterMethod->getReturnType()) !=
2190  Context.VoidTy)
2191  Diag(SetterMethod->getLocation(), diag::err_setter_type_void);
2192  if (SetterMethod->param_size() != 1 ||
2194  (*SetterMethod->param_begin())->getType().getNonReferenceType(),
2195  property->getType().getNonReferenceType())) {
2196  Diag(property->getLocation(),
2197  diag::warn_accessor_property_type_mismatch)
2198  << property->getDeclName()
2199  << SetterMethod->getSelector();
2200  Diag(SetterMethod->getLocation(), diag::note_declared_at);
2201  }
2202  }
2203 
2204  // Synthesize getter/setter methods if none exist.
2205  // Find the default getter and if one not found, add one.
2206  // FIXME: The synthesized property we set here is misleading. We almost always
2207  // synthesize these methods unless the user explicitly provided prototypes
2208  // (which is odd, but allowed). Sema should be typechecking that the
2209  // declarations jive in that situation (which it is not currently).
2210  if (!GetterMethod) {
2211  // No instance/class method of same name as property getter name was found.
2212  // Declare a getter method and add it to the list of methods
2213  // for this class.
2214  SourceLocation Loc = property->getLocation();
2215 
2216  // The getter returns the declared property type with all qualifiers
2217  // removed.
2218  QualType resultTy = property->getType().getAtomicUnqualifiedType();
2219 
2220  // If the property is null_resettable, the getter returns nonnull.
2221  if (property->getPropertyAttributes() &
2223  QualType modifiedTy = resultTy;
2224  if (auto nullability = AttributedType::stripOuterNullability(modifiedTy)) {
2225  if (*nullability == NullabilityKind::Unspecified)
2227  modifiedTy, modifiedTy);
2228  }
2229  }
2230 
2231  GetterMethod = ObjCMethodDecl::Create(Context, Loc, Loc,
2232  property->getGetterName(),
2233  resultTy, nullptr, CD,
2234  !IsClassProperty, /*isVariadic=*/false,
2235  /*isPropertyAccessor=*/true,
2236  /*isImplicitlyDeclared=*/true, /*isDefined=*/false,
2237  (property->getPropertyImplementation() ==
2241  CD->addDecl(GetterMethod);
2242 
2243  AddPropertyAttrs(*this, GetterMethod, property);
2244 
2245  if (property->hasAttr<NSReturnsNotRetainedAttr>())
2246  GetterMethod->addAttr(NSReturnsNotRetainedAttr::CreateImplicit(Context,
2247  Loc));
2248 
2249  if (property->hasAttr<ObjCReturnsInnerPointerAttr>())
2250  GetterMethod->addAttr(
2251  ObjCReturnsInnerPointerAttr::CreateImplicit(Context, Loc));
2252 
2253  if (const SectionAttr *SA = property->getAttr<SectionAttr>())
2254  GetterMethod->addAttr(
2255  SectionAttr::CreateImplicit(Context, SectionAttr::GNU_section,
2256  SA->getName(), Loc));
2257 
2258  if (getLangOpts().ObjCAutoRefCount)
2259  CheckARCMethodDecl(GetterMethod);
2260  } else
2261  // A user declared getter will be synthesize when @synthesize of
2262  // the property with the same name is seen in the @implementation
2263  GetterMethod->setPropertyAccessor(true);
2264  property->setGetterMethodDecl(GetterMethod);
2265 
2266  // Skip setter if property is read-only.
2267  if (!property->isReadOnly()) {
2268  // Find the default setter and if one not found, add one.
2269  if (!SetterMethod) {
2270  // No instance/class method of same name as property setter name was
2271  // found.
2272  // Declare a setter method and add it to the list of methods
2273  // for this class.
2274  SourceLocation Loc = property->getLocation();
2275 
2276  SetterMethod =
2277  ObjCMethodDecl::Create(Context, Loc, Loc,
2278  property->getSetterName(), Context.VoidTy,
2279  nullptr, CD, !IsClassProperty,
2280  /*isVariadic=*/false,
2281  /*isPropertyAccessor=*/true,
2282  /*isImplicitlyDeclared=*/true,
2283  /*isDefined=*/false,
2284  (property->getPropertyImplementation() ==
2288 
2289  // Remove all qualifiers from the setter's parameter type.
2290  QualType paramTy =
2291  property->getType().getUnqualifiedType().getAtomicUnqualifiedType();
2292 
2293  // If the property is null_resettable, the setter accepts a
2294  // nullable value.
2295  if (property->getPropertyAttributes() &
2297  QualType modifiedTy = paramTy;
2298  if (auto nullability = AttributedType::stripOuterNullability(modifiedTy)){
2299  if (*nullability == NullabilityKind::Unspecified)
2301  modifiedTy, modifiedTy);
2302  }
2303  }
2304 
2305  // Invent the arguments for the setter. We don't bother making a
2306  // nice name for the argument.
2307  ParmVarDecl *Argument = ParmVarDecl::Create(Context, SetterMethod,
2308  Loc, Loc,
2309  property->getIdentifier(),
2310  paramTy,
2311  /*TInfo=*/nullptr,
2312  SC_None,
2313  nullptr);
2314  SetterMethod->setMethodParams(Context, Argument, None);
2315 
2316  AddPropertyAttrs(*this, SetterMethod, property);
2317 
2318  CD->addDecl(SetterMethod);
2319  if (const SectionAttr *SA = property->getAttr<SectionAttr>())
2320  SetterMethod->addAttr(
2321  SectionAttr::CreateImplicit(Context, SectionAttr::GNU_section,
2322  SA->getName(), Loc));
2323  // It's possible for the user to have set a very odd custom
2324  // setter selector that causes it to have a method family.
2325  if (getLangOpts().ObjCAutoRefCount)
2326  CheckARCMethodDecl(SetterMethod);
2327  } else
2328  // A user declared setter will be synthesize when @synthesize of
2329  // the property with the same name is seen in the @implementation
2330  SetterMethod->setPropertyAccessor(true);
2331  property->setSetterMethodDecl(SetterMethod);
2332  }
2333  // Add any synthesized methods to the global pool. This allows us to
2334  // handle the following, which is supported by GCC (and part of the design).
2335  //
2336  // @interface Foo
2337  // @property double bar;
2338  // @end
2339  //
2340  // void thisIsUnfortunate() {
2341  // id foo;
2342  // double bar = [foo bar];
2343  // }
2344  //
2345  if (!IsClassProperty) {
2346  if (GetterMethod)
2347  AddInstanceMethodToGlobalPool(GetterMethod);
2348  if (SetterMethod)
2349  AddInstanceMethodToGlobalPool(SetterMethod);
2350  } else {
2351  if (GetterMethod)
2352  AddFactoryMethodToGlobalPool(GetterMethod);
2353  if (SetterMethod)
2354  AddFactoryMethodToGlobalPool(SetterMethod);
2355  }
2356 
2357  ObjCInterfaceDecl *CurrentClass = dyn_cast<ObjCInterfaceDecl>(CD);
2358  if (!CurrentClass) {
2359  if (ObjCCategoryDecl *Cat = dyn_cast<ObjCCategoryDecl>(CD))
2360  CurrentClass = Cat->getClassInterface();
2361  else if (ObjCImplDecl *Impl = dyn_cast<ObjCImplDecl>(CD))
2362  CurrentClass = Impl->getClassInterface();
2363  }
2364  if (GetterMethod)
2365  CheckObjCMethodOverrides(GetterMethod, CurrentClass, Sema::RTC_Unknown);
2366  if (SetterMethod)
2367  CheckObjCMethodOverrides(SetterMethod, CurrentClass, Sema::RTC_Unknown);
2368 }
2369 
2371  SourceLocation Loc,
2372  unsigned &Attributes,
2373  bool propertyInPrimaryClass) {
2374  // FIXME: Improve the reported location.
2375  if (!PDecl || PDecl->isInvalidDecl())
2376  return;
2377 
2378  if ((Attributes & ObjCDeclSpec::DQ_PR_readonly) &&
2379  (Attributes & ObjCDeclSpec::DQ_PR_readwrite))
2380  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2381  << "readonly" << "readwrite";
2382 
2383  ObjCPropertyDecl *PropertyDecl = cast<ObjCPropertyDecl>(PDecl);
2384  QualType PropertyTy = PropertyDecl->getType();
2385 
2386  // Check for copy or retain on non-object types.
2387  if ((Attributes & (ObjCDeclSpec::DQ_PR_weak | ObjCDeclSpec::DQ_PR_copy |
2389  !PropertyTy->isObjCRetainableType() &&
2390  !PropertyDecl->hasAttr<ObjCNSObjectAttr>()) {
2391  Diag(Loc, diag::err_objc_property_requires_object)
2392  << (Attributes & ObjCDeclSpec::DQ_PR_weak ? "weak" :
2393  Attributes & ObjCDeclSpec::DQ_PR_copy ? "copy" : "retain (or strong)");
2396  PropertyDecl->setInvalidDecl();
2397  }
2398 
2399  // Check for more than one of { assign, copy, retain }.
2400  if (Attributes & ObjCDeclSpec::DQ_PR_assign) {
2401  if (Attributes & ObjCDeclSpec::DQ_PR_copy) {
2402  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2403  << "assign" << "copy";
2404  Attributes &= ~ObjCDeclSpec::DQ_PR_copy;
2405  }
2406  if (Attributes & ObjCDeclSpec::DQ_PR_retain) {
2407  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2408  << "assign" << "retain";
2409  Attributes &= ~ObjCDeclSpec::DQ_PR_retain;
2410  }
2411  if (Attributes & ObjCDeclSpec::DQ_PR_strong) {
2412  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2413  << "assign" << "strong";
2414  Attributes &= ~ObjCDeclSpec::DQ_PR_strong;
2415  }
2416  if (getLangOpts().ObjCAutoRefCount &&
2417  (Attributes & ObjCDeclSpec::DQ_PR_weak)) {
2418  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2419  << "assign" << "weak";
2420  Attributes &= ~ObjCDeclSpec::DQ_PR_weak;
2421  }
2422  if (PropertyDecl->hasAttr<IBOutletCollectionAttr>())
2423  Diag(Loc, diag::warn_iboutletcollection_property_assign);
2424  } else if (Attributes & ObjCDeclSpec::DQ_PR_unsafe_unretained) {
2425  if (Attributes & ObjCDeclSpec::DQ_PR_copy) {
2426  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2427  << "unsafe_unretained" << "copy";
2428  Attributes &= ~ObjCDeclSpec::DQ_PR_copy;
2429  }
2430  if (Attributes & ObjCDeclSpec::DQ_PR_retain) {
2431  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2432  << "unsafe_unretained" << "retain";
2433  Attributes &= ~ObjCDeclSpec::DQ_PR_retain;
2434  }
2435  if (Attributes & ObjCDeclSpec::DQ_PR_strong) {
2436  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2437  << "unsafe_unretained" << "strong";
2438  Attributes &= ~ObjCDeclSpec::DQ_PR_strong;
2439  }
2440  if (getLangOpts().ObjCAutoRefCount &&
2441  (Attributes & ObjCDeclSpec::DQ_PR_weak)) {
2442  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2443  << "unsafe_unretained" << "weak";
2444  Attributes &= ~ObjCDeclSpec::DQ_PR_weak;
2445  }
2446  } else if (Attributes & ObjCDeclSpec::DQ_PR_copy) {
2447  if (Attributes & ObjCDeclSpec::DQ_PR_retain) {
2448  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2449  << "copy" << "retain";
2450  Attributes &= ~ObjCDeclSpec::DQ_PR_retain;
2451  }
2452  if (Attributes & ObjCDeclSpec::DQ_PR_strong) {
2453  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2454  << "copy" << "strong";
2455  Attributes &= ~ObjCDeclSpec::DQ_PR_strong;
2456  }
2457  if (Attributes & ObjCDeclSpec::DQ_PR_weak) {
2458  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2459  << "copy" << "weak";
2460  Attributes &= ~ObjCDeclSpec::DQ_PR_weak;
2461  }
2462  }
2463  else if ((Attributes & ObjCDeclSpec::DQ_PR_retain) &&
2464  (Attributes & ObjCDeclSpec::DQ_PR_weak)) {
2465  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2466  << "retain" << "weak";
2467  Attributes &= ~ObjCDeclSpec::DQ_PR_retain;
2468  }
2469  else if ((Attributes & ObjCDeclSpec::DQ_PR_strong) &&
2470  (Attributes & ObjCDeclSpec::DQ_PR_weak)) {
2471  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2472  << "strong" << "weak";
2473  Attributes &= ~ObjCDeclSpec::DQ_PR_weak;
2474  }
2475 
2476  if (Attributes & ObjCDeclSpec::DQ_PR_weak) {
2477  // 'weak' and 'nonnull' are mutually exclusive.
2478  if (auto nullability = PropertyTy->getNullability(Context)) {
2479  if (*nullability == NullabilityKind::NonNull)
2480  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2481  << "nonnull" << "weak";
2482  }
2483  }
2484 
2485  if ((Attributes & ObjCDeclSpec::DQ_PR_atomic) &&
2486  (Attributes & ObjCDeclSpec::DQ_PR_nonatomic)) {
2487  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2488  << "atomic" << "nonatomic";
2489  Attributes &= ~ObjCDeclSpec::DQ_PR_atomic;
2490  }
2491 
2492  // Warn if user supplied no assignment attribute, property is
2493  // readwrite, and this is an object type.
2494  if (!getOwnershipRule(Attributes) && PropertyTy->isObjCRetainableType()) {
2495  if (Attributes & ObjCDeclSpec::DQ_PR_readonly) {
2496  // do nothing
2497  } else if (getLangOpts().ObjCAutoRefCount) {
2498  // With arc, @property definitions should default to strong when
2499  // not specified.
2501  } else if (PropertyTy->isObjCObjectPointerType()) {
2502  bool isAnyClassTy =
2503  (PropertyTy->isObjCClassType() ||
2504  PropertyTy->isObjCQualifiedClassType());
2505  // In non-gc, non-arc mode, 'Class' is treated as a 'void *' no need to
2506  // issue any warning.
2507  if (isAnyClassTy && getLangOpts().getGC() == LangOptions::NonGC)
2508  ;
2509  else if (propertyInPrimaryClass) {
2510  // Don't issue warning on property with no life time in class
2511  // extension as it is inherited from property in primary class.
2512  // Skip this warning in gc-only mode.
2513  if (getLangOpts().getGC() != LangOptions::GCOnly)
2514  Diag(Loc, diag::warn_objc_property_no_assignment_attribute);
2515 
2516  // If non-gc code warn that this is likely inappropriate.
2517  if (getLangOpts().getGC() == LangOptions::NonGC)
2518  Diag(Loc, diag::warn_objc_property_default_assign_on_object);
2519  }
2520  }
2521 
2522  // FIXME: Implement warning dependent on NSCopying being
2523  // implemented. See also:
2524  // <rdar://5168496&4855821&5607453&5096644&4947311&5698469&4947014&5168496>
2525  // (please trim this list while you are at it).
2526  }
2527 
2528  if (!(Attributes & ObjCDeclSpec::DQ_PR_copy)
2529  &&!(Attributes & ObjCDeclSpec::DQ_PR_readonly)
2530  && getLangOpts().getGC() == LangOptions::GCOnly
2531  && PropertyTy->isBlockPointerType())
2532  Diag(Loc, diag::warn_objc_property_copy_missing_on_block);
2533  else if ((Attributes & ObjCDeclSpec::DQ_PR_retain) &&
2534  !(Attributes & ObjCDeclSpec::DQ_PR_readonly) &&
2535  !(Attributes & ObjCDeclSpec::DQ_PR_strong) &&
2536  PropertyTy->isBlockPointerType())
2537  Diag(Loc, diag::warn_objc_property_retain_of_block);
2538 
2539  if ((Attributes & ObjCDeclSpec::DQ_PR_readonly) &&
2540  (Attributes & ObjCDeclSpec::DQ_PR_setter))
2541  Diag(Loc, diag::warn_objc_readonly_property_has_setter);
2542 }
A call to an overloaded operator written using operator syntax.
Definition: ExprCXX.h:52
SourceLocation getLocForStartOfFile(FileID FID) const
Return the source location corresponding to the first byte of the specified file. ...
ObjCPropertyQueryKind getQueryKind() const
Definition: DeclObjC.h:837
bool RequireNonAbstractType(SourceLocation Loc, QualType T, TypeDiagnoser &Diagnoser)
FunctionDecl - An instance of this class is created to represent a function declaration or definition...
Definition: Decl.h:1583
Lexer - This provides a simple interface that turns a text buffer into a stream of tokens...
Definition: Lexer.h:46
SourceLocation getLocWithOffset(int Offset) const
Return a source location with the specified offset from this SourceLocation.
protocol_range protocols() const
Definition: DeclObjC.h:1296
Smart pointer class that efficiently represents Objective-C method names.
A (possibly-)qualified type.
Definition: Type.h:616
ObjCInterfaceDecl * getClassInterface()
Definition: DeclObjC.h:2232
all_protocol_range all_referenced_protocols() const
Definition: DeclObjC.h:1351
ObjCInterfaceDecl * getClassInterface()
Definition: DeclObjC.cpp:1089
bool IvarBacksCurrentMethodAccessor(ObjCInterfaceDecl *IFace, ObjCMethodDecl *Method, ObjCIvarDecl *IV)
IvarBacksCurrentMethodAccessor - This routine returns &#39;true&#39; if &#39;IV&#39; is an ivar synthesized for &#39;Meth...
IdentifierInfo * getIdentifierInfo(StringRef Name) const
Return information about the specified preprocessor identifier token.
Definition: Preprocessor.h:936
bool isObjCPointerConversion(QualType FromType, QualType ToType, QualType &ConvertedType, bool &IncompatibleObjC)
isObjCPointerConversion - Determines whether this is an Objective-C pointer conversion.
bool isArithmeticType() const
Definition: Type.cpp:1852
llvm::DenseMap< std::pair< IdentifierInfo *, unsigned >, ObjCPropertyDecl * > PropertyMap
Definition: DeclObjC.h:1041
Decl * ActOnProperty(Scope *S, SourceLocation AtLoc, SourceLocation LParenLoc, FieldDeclarator &FD, ObjCDeclSpec &ODS, Selector GetterSel, Selector SetterSel, tok::ObjCKeywordKind MethodImplKind, DeclContext *lexicalDC=nullptr)
Defines the SourceManager interface.
void ActOnDocumentableDecl(Decl *D)
Should be called on all declarations that might have attached documentation comments.
Definition: SemaDecl.cpp:11474
void setObjCLifetime(ObjCLifetime type)
Definition: Type.h:312
static void CollectSuperClassPropertyImplementations(ObjCInterfaceDecl *CDecl, ObjCInterfaceDecl::PropertyMap &PropMap)
CollectSuperClassPropertyImplementations - This routine collects list of properties to be implemented...
bool isRecordType() const
Definition: Type.h:5767
QualType getQualifiedType(SplitQualType split) const
Un-split a SplitQualType.
Definition: ASTContext.h:1800
SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID)
Emit a diagnostic.
Definition: Sema.h:1214
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:81
void DiagnoseMissingDesignatedInitOverrides(const ObjCImplementationDecl *ImplD, const ObjCInterfaceDecl *IFD)
void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, SourceLocation Loc, unsigned &Attributes, bool propertyInPrimaryClass)
Ensure attributes are consistent with type.
Captures information about "declaration specifiers" specific to Objective-C.
Definition: DeclSpec.h:778
StringRef P
QualType getNonReferenceType() const
If Type is a reference type (e.g., const int&), returns the type that the reference refers to ("const...
Definition: Type.h:5660
static ObjCPropertyDecl * Create(ASTContext &C, DeclContext *DC, SourceLocation L, IdentifierInfo *Id, SourceLocation AtLocation, SourceLocation LParenLocation, QualType T, TypeSourceInfo *TSI, PropertyControl propControl=None)
Definition: DeclObjC.cpp:2182
void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false)
AddFactoryMethodToGlobalPool - Same as above, but for factory methods.
Definition: Sema.h:3481
CanQual< T > getUnqualifiedType() const
Retrieve the unqualified form of this type.
StringRef getLastMacroWithSpelling(SourceLocation Loc, ArrayRef< TokenValue > Tokens) const
Return the name of the macro defined before Loc that has spelling Tokens.
void MarkDeclRefReferenced(DeclRefExpr *E)
Perform reference-marking and odr-use handling for a DeclRefExpr.
Definition: SemaExpr.cpp:14669
SourceLocation getLocForEndOfToken(SourceLocation Loc, unsigned Offset=0)
Calls Lexer::getLocForEndOfToken()
Definition: Sema.cpp:45
A container of type source information.
Definition: Decl.h:62
void ProcessPropertyDecl(ObjCPropertyDecl *property)
Process the specified property declaration and create decls for the setters and getters as needed...
void setPropertyAccessor(bool isAccessor)
Definition: DeclObjC.h:424
Decl * ActOnPropertyImplDecl(Scope *S, SourceLocation AtLoc, SourceLocation PropertyLoc, bool ImplKind, IdentifierInfo *PropertyId, IdentifierInfo *PropertyIvar, SourceLocation PropertyIvarLoc, ObjCPropertyQueryKind QueryKind)
ActOnPropertyImplDecl - This routine performs semantic checks and builds the AST node for a property ...
StringRef getBufferData(FileID FID, bool *Invalid=nullptr) const
Return a StringRef to the source buffer data for the specified FileID.
RAII object to handle the state changes required to synthesize a function body.
Definition: Sema.h:689
const T * getAs() const
Member-template getAs<specific type>&#39;.
Definition: Type.h:6040
llvm::DenseMap< const ObjCProtocolDecl *, ObjCPropertyDecl * > ProtocolPropertyMap
Definition: DeclObjC.h:1044
static unsigned getOwnershipRule(unsigned attr)
ObjCMethodDecl - Represents an instance or class method declaration.
Definition: DeclObjC.h:113
ObjCPropertyDecl * HandlePropertyInClassExtension(Scope *S, SourceLocation AtLoc, SourceLocation LParenLoc, FieldDeclarator &FD, Selector GetterSel, SourceLocation GetterNameLoc, Selector SetterSel, SourceLocation SetterNameLoc, const bool isReadWrite, unsigned &Attributes, const unsigned AttributesAsWritten, QualType T, TypeSourceInfo *TSI, tok::ObjCKeywordKind MethodImplKind)
Called by ActOnProperty to handle @property declarations in class extensions.
bool ClassImplementsProtocol(ObjCProtocolDecl *lProto, bool lookupCategory, bool RHSIsQualifiedID=false)
ClassImplementsProtocol - Checks that &#39;lProto&#39; protocol has been implemented in IDecl class...
Definition: DeclObjC.cpp:1654
bool isInvalidDecl() const
Definition: DeclBase.h:513
static InitializedEntity InitializeResult(SourceLocation ReturnLoc, QualType Type, bool NRVO)
Create the initialization entity for the result of a function.
static ObjCPropertyDecl * findPropertyDecl(const DeclContext *DC, const IdentifierInfo *propertyID, ObjCPropertyQueryKind queryKind)
Lookup a property by name in the specified DeclContext.
Definition: DeclObjC.cpp:154
protocol_range protocols() const
Definition: DeclObjC.h:2043
ParmVarDecl - Represents a parameter to a function.
Definition: Decl.h:1399
Defines the clang::Expr interface and subclasses for C++ expressions.
The collection of all-type qualifiers we support.
Definition: Type.h:118
IdentifierInfo * getIdentifier() const
getIdentifier - Get the identifier that names this declaration, if there is one.
Definition: Decl.h:232
static void CollectImmediateProperties(ObjCContainerDecl *CDecl, ObjCContainerDecl::PropertyMap &PropMap, ObjCContainerDecl::PropertyMap &SuperPropMap, bool CollectClassPropsOnly=false, bool IncludeProtocols=true)
CollectImmediateProperties - This routine collects all properties in the class and its conforming pro...
DeclarationName getDeclName() const
getDeclName - Get the actual, stored name of the declaration, which may be a special name...
Definition: Decl.h:258
instprop_range instance_properties() const
Definition: DeclObjC.h:952
One of these records is kept for each identifier that is lexed.
SourceLocation getSetterNameLoc() const
Definition: DeclSpec.h:872
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:128
The results of name lookup within a DeclContext.
Definition: DeclBase.h:1107
ObjCMethodDecl * getClassMethod(Selector Sel, bool AllowHidden=false) const
Definition: DeclObjC.h:1029
ObjCMethodFamily
A family of Objective-C methods.
instmeth_range instance_methods() const
Definition: DeclObjC.h:997
method_range methods() const
Definition: DeclObjC.h:982
Token - This structure provides full information about a lexed token.
Definition: Token.h:35
prop_range properties() const
Definition: DeclObjC.h:939
int Category
Definition: Format.cpp:1283
IdentifierTable & Idents
Definition: ASTContext.h:513
This little struct is used to capture information about structure field declarators, which is basically just a bitfield size.
Definition: DeclSpec.h:2427
An r-value expression (a pr-value in the C++11 taxonomy) produces a temporary value.
Definition: Specifiers.h:106
bool isClassProperty() const
Definition: DeclObjC.h:836
ObjCMethodFamily getMethodFamily() const
Determines the family of this method.
Definition: DeclObjC.cpp:931
void collectPropertiesToImplement(PropertyMap &PM, PropertyDeclOrder &PO) const override
This routine collects list of properties to be implemented in the class.
Definition: DeclObjC.cpp:370
void setObjCWeakProperty(bool Val=true)
Definition: DeclSpec.h:2377
bool isNonFragile() const
Does this runtime follow the set of implied behaviors for a "non-fragile" ABI?
Definition: ObjCRuntime.h:80
ObjCContainerDecl - Represents a container for method declarations.
Definition: DeclObjC.h:919
static ObjCPropertyImplDecl * Create(ASTContext &C, DeclContext *DC, SourceLocation atLoc, SourceLocation L, ObjCPropertyDecl *property, Kind PK, ObjCIvarDecl *ivarDecl, SourceLocation ivarLoc)
Definition: DeclObjC.cpp:2210
AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, QualType LHSType, QualType RHSType)
CheckAssignmentConstraints - Perform type checking for assignment, argument passing, variable initialization, and function return values.
Definition: SemaExpr.cpp:7493
Whether values of this type can be null is (explicitly) unspecified.
PropertyAttributeKind getPropertyAttributes() const
Definition: DeclObjC.h:799
const ObjCInterfaceDecl * isObjCRequiresPropertyDefs() const
isObjCRequiresPropertyDefs - Checks that a class or one of its super classes must not be auto-synthes...
Definition: DeclObjC.cpp:400
static void DiagnoseUnimplementedAccessor(Sema &S, ObjCInterfaceDecl *PrimaryClass, Selector Method, ObjCImplDecl *IMPDecl, ObjCContainerDecl *CDecl, ObjCCategoryDecl *C, ObjCPropertyDecl *Prop, llvm::SmallPtrSet< const ObjCMethodDecl *, 8 > &SMap)
bool isReadOnly() const
isReadOnly - Return true iff the property has a setter.
Definition: DeclObjC.h:820
Values of this type can never be null.
ObjCProtocolDecl * getDefinition()
Retrieve the definition of this protocol, if any.
Definition: DeclObjC.h:2116
Scope - A scope is a transient data structure that is used while parsing the program.
Definition: Scope.h:39
bool declaresSameEntity(const Decl *D1, const Decl *D2)
Determine whether two declarations declare the same entity.
Definition: DeclBase.h:1079
Represents an Objective-C protocol declaration.
Definition: DeclObjC.h:1986
Preprocessor & PP
Definition: Sema.h:304
const LangOptions & getLangOpts() const
Definition: Sema.h:1137
PropertyControl getPropertyImplementation() const
Definition: DeclObjC.h:885
Represents an ObjC class declaration.
Definition: DeclObjC.h:1109
ObjCPropertyDecl * CreatePropertyDecl(Scope *S, ObjCContainerDecl *CDecl, SourceLocation AtLoc, SourceLocation LParenLoc, FieldDeclarator &FD, Selector GetterSel, SourceLocation GetterNameLoc, Selector SetterSel, SourceLocation SetterNameLoc, const bool isReadWrite, const unsigned Attributes, const unsigned AttributesAsWritten, QualType T, TypeSourceInfo *TSI, tok::ObjCKeywordKind MethodImplKind, DeclContext *lexicalDC=nullptr)
Called by ActOnProperty and HandlePropertyInClassExtension to handle creating the ObjcPropertyDecl fo...
QualType getReturnType() const
Definition: DeclObjC.h:330
IdentifierInfo * getIdentifier() const
Definition: DeclSpec.h:2114
const LangOptions & LangOpts
Definition: Sema.h:303
This object can be modified without requiring retains or releases.
Definition: Type.h:139
void AtomicPropertySetterGetterRules(ObjCImplDecl *IMPDecl, ObjCInterfaceDecl *IDecl)
AtomicPropertySetterGetterRules - This routine enforces the rule (via warning) when atomic property h...
void setGetterCXXConstructor(Expr *getterCXXConstructor)
Definition: DeclObjC.h:2736
void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false)
AddInstanceMethodToGlobalPool - All instance methods in a translation unit are added to a global pool...
Definition: Sema.h:3476
lookup_result lookup(DeclarationName Name) const
lookup - Find the declarations (if any) with the given Name in this context.
Definition: DeclBase.cpp:1505
void CheckObjCMethodOverrides(ObjCMethodDecl *ObjCMethod, ObjCInterfaceDecl *CurrentClass, ResultTypeCompatibilityKind RTC)
ObjCPropertyImplDecl - Represents implementation declaration of a property in a class or category imp...
Definition: DeclObjC.h:2645
bool hasAttr() const
Definition: DeclBase.h:502
Sema - This implements semantic analysis and AST building for C.
Definition: Sema.h:269
static void AddPropertyAttrs(Sema &S, ObjCMethodDecl *PropertyMethod, ObjCPropertyDecl *Property)
AddPropertyAttrs - Propagates attributes from a property to the implicitly-declared getter or setter ...
bool isFragile() const
The inverse of isNonFragile(): does this runtime follow the set of implied behaviors for a "fragile" ...
Definition: ObjCRuntime.h:95
llvm::SmallPtrSet< Selector, 8 > SelectorSet
Definition: Sema.h:3295
static ImplicitCastExpr * Create(const ASTContext &Context, QualType T, CastKind Kind, Expr *Operand, const CXXCastPath *BasePath, ExprValueKind Cat)
Definition: Expr.cpp:1690
void addObjCLifetime(ObjCLifetime type)
Definition: Type.h:316
QualType getUsageType(QualType objectType) const
Retrieve the type of this instance variable when viewed as a member of a specific object type...
Definition: DeclObjC.cpp:1765
TypeSourceInfo * getTrivialTypeSourceInfo(QualType T, SourceLocation Loc=SourceLocation()) const
Allocate a TypeSourceInfo where all locations have been initialized to a given location, which defaults to the empty location.
ID
Defines the address space values used by the address space qualifier of QualType. ...
Definition: AddressSpaces.h:26
SourceLocation getBeginLoc() const
Get the begin source location.
Definition: TypeLoc.cpp:169
bool isObjCGCStrong() const
true when Type is objc&#39;s strong.
Definition: Type.h:1023
Expr - This represents one expression.
Definition: Expr.h:105
known_extensions_range known_extensions() const
Definition: DeclObjC.h:1681
static ObjCMethodDecl * Create(ASTContext &C, SourceLocation beginLoc, SourceLocation endLoc, Selector SelInfo, QualType T, TypeSourceInfo *ReturnTInfo, DeclContext *contextDecl, bool isInstance=true, bool isVariadic=false, bool isPropertyAccessor=false, bool isImplicitlyDeclared=false, bool isDefined=false, ImplementationControl impControl=None, bool HasRelatedResultType=false)
Definition: DeclObjC.cpp:759
Selector getSetterName() const
Definition: DeclObjC.h:868
bool HasUserDeclaredSetterMethod(const ObjCPropertyDecl *P) const
This routine returns &#39;true&#39; if a user declared setter method was found in the class, its protocols, its super classes or categories.
Definition: DeclObjC.cpp:101
IdentifierInfo * getDefaultSynthIvarName(ASTContext &Ctx) const
Get the default name of the synthesized ivar.
Definition: DeclObjC.cpp:202
bool isObjCARCImplicitlyUnretainedType() const
Determines if this type, which must satisfy isObjCLifetimeType(), is implicitly __unsafe_unretained r...
Definition: Type.cpp:3702
TypeSourceInfo * getTypeSourceInfo() const
Definition: DeclObjC.h:786
bool isObjCRetainableType() const
Definition: Type.cpp:3740
static ObjCPropertyDecl::PropertyAttributeKind makePropertyAttributesAsWritten(unsigned Attributes)
void setInvalidDecl(bool Invalid=true)
setInvalidDecl - Indicates the Decl had a semantic error.
Definition: DeclBase.cpp:111
static bool hasWrittenStorageAttribute(ObjCPropertyDecl *Prop, ObjCPropertyQueryKind QueryKind)
Determine whether any storage attributes were written on the property.
Defines the clang::Preprocessor interface.
DeclContext * getDeclContext()
Definition: DeclBase.h:397
ParmVarDecl *const * param_iterator
Definition: DeclObjC.h:350
ObjCInterfaceDecl * getSuperClass() const
Definition: DeclObjC.cpp:314
Stores token information for comparing actual tokens with predefined values.
Definition: Preprocessor.h:66
ObjCPropertyDecl * FindPropertyVisibleInPrimaryClass(IdentifierInfo *PropertyId, ObjCPropertyQueryKind QueryKind) const
FindPropertyVisibleInPrimaryClass - Finds declaration of the property with name &#39;PropertyId&#39; in the p...
Definition: DeclObjC.cpp:346
bool RequireCompleteType(SourceLocation Loc, QualType T, TypeDiagnoser &Diagnoser)
Ensure that the type T is a complete type.
Definition: SemaType.cpp:7081
A std::pair-like structure for storing a qualified type split into its local qualifiers and its local...
Definition: Type.h:559
static Optional< NullabilityKind > stripOuterNullability(QualType &T)
Strip off the top-level nullability annotation on the given type, if it&#39;s there.
Definition: Type.cpp:3652
ObjCIvarDecl * lookupInstanceVariable(IdentifierInfo *IVarName, ObjCInterfaceDecl *&ClassDeclared)
Definition: DeclObjC.cpp:600
clang::ObjCRuntime ObjCRuntime
Definition: LangOptions.h:115
propimpl_range property_impls() const
Definition: DeclObjC.h:2367
Qualifiers Quals
The local qualifiers.
Definition: Type.h:564
bool isInvalid() const
Definition: Ownership.h:159
bool isInstanceMethod() const
Definition: DeclObjC.h:416
Preprocessor & getPreprocessor() const
Definition: Sema.h:1143
Selector getSelector() const
Definition: DeclObjC.h:328
SourceLocation getLocEnd() const LLVM_READONLY
Definition: TypeLoc.h:138
QualType getType() const
Definition: DeclObjC.h:788
const SourceManager & SM
Definition: Format.cpp:1272
static StringRef getIdentifier(const Token &Tok)
ObjCKeywordKind
Provides a namespace for Objective-C keywords which start with an &#39;@&#39;.
Definition: TokenKinds.h:41
void DefaultSynthesizeProperties(Scope *S, ObjCImplDecl *IMPDecl, ObjCInterfaceDecl *IDecl)
DefaultSynthesizeProperties - This routine default synthesizes all properties which must be synthesiz...
QualType getObjCGCQualType(QualType T, Qualifiers::GC gcAttr) const
Return the uniqued reference to the type for an Objective-C gc-qualified type.
SplitQualType split() const
Divides a QualType into its unqualified type and a set of local qualifiers.
Definition: Type.h:5495
void addAttr(Attr *A)
Definition: DeclBase.h:453
SourceLocation getLocStart() const LLVM_READONLY
Definition: DeclBase.h:381
There is no lifetime qualification on this type.
Definition: Type.h:135
void makeDeclVisibleInContext(NamedDecl *D)
Makes a declaration visible within this context.
Definition: DeclBase.cpp:1677
Assigning into this object requires the old value to be released and the new value to be retained...
Definition: Type.h:146
ActionResult - This structure is used while parsing/acting on expressions, stmts, etc...
Definition: Ownership.h:145
Encodes a location in the source.
bool getSynthesize() const
Definition: DeclObjC.h:1913
IdentifierInfo & get(StringRef Name)
Return the identifier token info for the specified named identifier.
ObjCPropertyQueryKind
Definition: DeclObjC.h:692
static Qualifiers::ObjCLifetime getImpliedARCOwnership(ObjCPropertyDecl::PropertyAttributeKind attrs, QualType type)
getImpliedARCOwnership - Given a set of property attributes and a type, infer an expected lifetime...
ObjCPropertyAttributeKind getPropertyAttributes() const
Definition: DeclSpec.h:832
ObjCCategoryDecl - Represents a category declaration.
Definition: DeclObjC.h:2189
CanQualType VoidTy
Definition: ASTContext.h:963
void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl *IMPDecl, ObjCContainerDecl *CDecl, bool SynthesizeProperties)
DiagnoseUnimplementedProperties - This routine warns on those properties which must be implemented by...
Represents one property declaration in an Objective-C interface.
Definition: DeclObjC.h:704
ObjCMethodDecl * lookupPropertyAccessor(const Selector Sel, const ObjCCategoryDecl *Cat, bool IsClassProperty) const
Lookup a setter or getter in the class hierarchy, including in all categories except for category pas...
Definition: DeclObjC.h:1788
ObjCProtocolDecl * LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc, RedeclarationKind Redecl=NotForRedeclaration)
Find the protocol with the given name, if any.
ObjCPropertyImplDecl * FindPropertyImplIvarDecl(IdentifierInfo *ivarId) const
FindPropertyImplIvarDecl - This method lookup the ivar in the list of properties implemented in this ...
Definition: DeclObjC.cpp:2059
QualType getAttributedType(AttributedType::Kind attrKind, QualType modifiedType, QualType equivalentType)
Indicates that the nullability of the type was spelled with a property attribute rather than a type q...
Definition: DeclObjC.h:723
Assigning into this object requires a lifetime extension.
Definition: Type.h:152
bool hasSameUnqualifiedType(QualType T1, QualType T2) const
Determine whether the given types are equivalent after cvr-qualifiers have been removed.
Definition: ASTContext.h:2119
void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D)
llvm::SmallVector< ObjCPropertyDecl *, 8 > PropertyDeclOrder
Definition: DeclObjC.h:1046
void setSetterCXXAssignment(Expr *setterCXXAssignment)
Definition: DeclObjC.h:2743
static void checkARCPropertyImpl(Sema &S, SourceLocation propertyImplLoc, ObjCPropertyDecl *property, ObjCIvarDecl *ivar)
bool isObjCGCWeak() const
true when Type is objc&#39;s weak.
Definition: Type.h:1018
bool propertyTypesAreCompatible(QualType, QualType)
ExprResult PerformCopyInitialization(const InitializedEntity &Entity, SourceLocation EqualLoc, ExprResult Init, bool TopLevelOfInitList=false, bool AllowExplicit=false)
Definition: SemaInit.cpp:8280
const ObjCInterfaceDecl * getClassInterface() const
Definition: DeclObjC.h:2341
redecl_range redecls() const
Returns an iterator range for all the redeclarations of the same decl.
Definition: DeclBase.h:872
static ParmVarDecl * Create(ASTContext &C, DeclContext *DC, SourceLocation StartLoc, SourceLocation IdLoc, IdentifierInfo *Id, QualType T, TypeSourceInfo *TInfo, StorageClass S, Expr *DefArg)
Definition: Decl.cpp:2384
static void setImpliedPropertyAttributeForReadOnlyProperty(ObjCPropertyDecl *property, ObjCIvarDecl *ivar)
setImpliedPropertyAttributeForReadOnlyProperty - This routine evaludates life-time attributes for a &#39;...
/file This file defines classes for searching and anlyzing source code clones.
bool isValid() const
Return true if this is a valid SourceLocation object.
ObjCPropertyDecl * FindPropertyDeclaration(const IdentifierInfo *PropertyId, ObjCPropertyQueryKind QueryKind) const
FindPropertyDeclaration - Finds declaration of the property given its name in &#39;PropertyId&#39; and return...
Definition: DeclObjC.cpp:213
void diagnoseNullResettableSynthesizedSetters(const ObjCImplDecl *impDecl)
Diagnose any null-resettable synthesized setters.
DeclContext - This is used only as base class of specific decl types that can act as declaration cont...
Definition: DeclBase.h:1176
static bool SuperClassImplementsProperty(ObjCInterfaceDecl *IDecl, ObjCPropertyDecl *Prop)
PropertyAttributeKind getPropertyAttributesAsWritten() const
Definition: DeclObjC.h:809
const internal::VariadicAllOfMatcher< Type > type
Matches Types in the clang AST.
Definition: ASTMatchers.h:2126
The basic abstraction for the target Objective-C runtime.
Definition: ObjCRuntime.h:25
SourceLocation getLocStart() const LLVM_READONLY
Definition: TypeLoc.h:137
attr_range attrs() const
Definition: DeclBase.h:463
bool CheckARCMethodDecl(ObjCMethodDecl *method)
Check a method declaration for compatibility with the Objective-C ARC conventions.
bool hasObjCLifetime() const
Definition: Type.h:308
static void DiagnosePropertyMismatchDeclInProtocols(Sema &S, SourceLocation AtLoc, ObjCInterfaceDecl *ClassDecl, ObjCPropertyDecl *Property)
DiagnosePropertyMismatchDeclInProtocols - diagnose properties declared in inherited protocols with mi...
bool hasDesignatedInitializers() const
Returns true if this interface decl contains at least one initializer marked with the &#39;objc_designate...
Definition: DeclObjC.cpp:1476
Represents a pointer to an Objective C object.
Definition: Type.h:5218
static ObjCIvarDecl * Create(ASTContext &C, ObjCContainerDecl *DC, SourceLocation StartLoc, SourceLocation IdLoc, IdentifierInfo *Id, QualType T, TypeSourceInfo *TInfo, AccessControl ac, Expr *BW=nullptr, bool synthesized=false)
Definition: DeclObjC.cpp:1699
ObjCImplementationDecl - Represents a class definition - this is where method definitions are specifi...
Definition: DeclObjC.h:2448
void overwritePropertyAttributes(unsigned PRVal)
Definition: DeclObjC.h:805
AvailabilityResult getAvailability(std::string *Message=nullptr, VersionTuple EnclosingVersion=VersionTuple()) const
Determine the availability of the given declaration.
Definition: DeclBase.cpp:560
T * getAttr() const
Definition: DeclBase.h:499
SourceLocation getGetterNameLoc() const
Definition: DeclSpec.h:864
bool hasSameType(QualType T1, QualType T2) const
Determine whether the given types T1 and T2 are equivalent.
Definition: ASTContext.h:2094
const internal::VariadicDynCastAllOfMatcher< Stmt, CallExpr > callExpr
Matches call expressions.
Definition: ASTMatchers.h:1086
static FixItHint CreateInsertion(SourceLocation InsertionLoc, StringRef Code, bool BeforePreviousInsertions=false)
Create a code modification hint that inserts the given code string at a specific location.
Definition: Diagnostic.h:90
void addDecl(Decl *D)
Add the declaration D into this context.
Definition: DeclBase.cpp:1394
bool canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, const ObjCObjectPointerType *RHSOPT)
canAssignObjCInterfaces - Return true if the two interface types are compatible for assignment from R...
ObjCMethodDecl * lookupMethod(Selector Sel, bool isInstance, bool shallowCategoryLookup=false, bool followSuper=true, const ObjCCategoryDecl *C=nullptr) const
lookupMethod - This method returns an instance/class method by looking in the class, its categories, and its super classes (using a linear search).
Definition: DeclObjC.cpp:662
static void checkAtomicPropertyMismatch(Sema &S, ObjCPropertyDecl *OldProperty, ObjCPropertyDecl *NewProperty, bool PropagateAtomicity)
Check for a mismatch in the atomicity of the given properties.
ObjCIvarRefExpr - A reference to an ObjC instance variable.
Definition: ExprObjC.h:479
SourceManager & getSourceManager()
Definition: ASTContext.h:616
bool isObjCObjectType() const
Definition: Type.h:5785
bool IsClassExtension() const
Definition: DeclObjC.h:2292
SourceLocation getIdentifierLoc() const
Definition: DeclSpec.h:2120
CanQualType getCanonicalType(QualType T) const
Return the canonical (structural) type corresponding to the specified potentially non-canonical type ...
Definition: ASTContext.h:2078
TypeLoc getTypeLoc() const
Return the TypeLoc wrapper for the type source info.
Definition: TypeLoc.h:222
static bool LocPropertyAttribute(ASTContext &Context, const char *attrName, SourceLocation LParenLoc, SourceLocation &Loc)
Reading or writing from this object requires a barrier call.
Definition: Type.h:149
Expr * MaybeCreateExprWithCleanups(Expr *SubExpr)
MaybeCreateExprWithCleanups - If the current full-expression requires any cleanups, surround it with a ExprWithCleanups node.
void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD)
ProcessDeclAttributes - Given a declarator (PD) with attributes indicated in it, apply them to D...
Compatible - the types are compatible according to the standard.
Definition: Sema.h:9179
ObjCPropertyImplDecl * FindPropertyImplDecl(IdentifierInfo *propertyId, ObjCPropertyQueryKind queryKind) const
FindPropertyImplDecl - This method looks up a previous ObjCPropertyImplDecl added to the list of thos...
Definition: DeclObjC.cpp:2072
ObjCIvarDecl - Represents an ObjC instance variable.
Definition: DeclObjC.h:1867
static unsigned deducePropertyOwnershipFromType(Sema &S, QualType T)
DeclContext * CurContext
CurContext - This is the current declaration context of parsing.
Definition: Sema.h:317
unsigned kind
All of the diagnostics that can be emitted by the frontend.
Definition: DiagnosticIDs.h:43
static FixItHint CreateReplacement(CharSourceRange RemoveRange, StringRef Code)
Create a code modification hint that replaces the given source range with the given code string...
Definition: Diagnostic.h:127
void setPropertyAttributes(PropertyAttributeKind PRVal)
Definition: DeclObjC.h:802
void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, ObjCPropertyDecl *SuperProperty, const IdentifierInfo *Name, bool OverridingProtocolProperty)
DiagnosePropertyMismatch - Compares two properties for their attributes and types and warns on a vari...
StringRef getName() const
getName - Get the name of identifier for this declaration as a StringRef.
Definition: Decl.h:237
bool isArcWeakrefUnavailable() const
isArcWeakrefUnavailable - Checks for a class or one of its super classes to be incompatible with __we...
Definition: DeclObjC.cpp:390
bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, ObjCMethodDecl *Getter, SourceLocation Loc)
static const unsigned OwnershipMask
A reference to a declared variable, function, enum, etc.
Definition: Expr.h:953
void addPropertyImplementation(ObjCPropertyImplDecl *property)
Definition: DeclObjC.cpp:2031
static void CheckPropertyAgainstProtocol(Sema &S, ObjCPropertyDecl *Prop, ObjCProtocolDecl *Proto, llvm::SmallPtrSetImpl< ObjCProtocolDecl *> &Known)
Check this Objective-C property against a property declared in the given protocol.
QualType getType() const
Definition: Decl.h:589
An l-value expression is a reference to an object with independent storage.
Definition: Specifiers.h:110
A trivial tuple used to represent a source range.
ASTContext & Context
Definition: Sema.h:305
void setLexicalDeclContext(DeclContext *DC)
Definition: DeclBase.cpp:268
ObjCMethodDecl * getGetterMethodDecl() const
Definition: DeclObjC.h:875
QualType getObjCObjectPointerType(QualType OIT) const
Return a ObjCObjectPointerType type for the given ObjCObjectType.
ObjCMethodDecl * getInstanceMethod(Selector Sel, bool AllowHidden=false) const
Definition: DeclObjC.h:1025
ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, BinaryOperatorKind Opc, Expr *LHSExpr, Expr *RHSExpr)
Definition: SemaExpr.cpp:11786
llvm::DenseMap< const Stmt *, CFGBlock * > SMap
Definition: CFGStmtMap.cpp:22
AccessControl getAccessControl() const
Definition: DeclObjC.h:1906
bool isPropertyAccessor() const
Definition: DeclObjC.h:423
Selector getGetterName() const
Definition: DeclObjC.h:861
SourceLocation getLParenLoc() const
Definition: DeclObjC.h:783
void setType(QualType newType)
Definition: Decl.h:590
const LangOptions & getLangOpts() const
Definition: ASTContext.h:659
ObjCCategoryImplDecl - An object of this class encapsulates a category @implementation declaration...
Definition: DeclObjC.h:2396
This class handles loading and caching of source files into memory.
static void checkPropertyDeclWithOwnership(Sema &S, ObjCPropertyDecl *property)
Check the internal consistency of a property declaration with an explicit ownership qualifier...
SourceLocation getLocation() const
Definition: DeclBase.h:388
TypeSourceInfo * GetTypeForDeclarator(Declarator &D, Scope *S)
GetTypeForDeclarator - Convert the type for the specified declarator to Type instances.
Definition: SemaType.cpp:4803
QualType getType() const
Return the type wrapped by this type source info.
Definition: Decl.h:70
std::pair< FileID, unsigned > getDecomposedLoc(SourceLocation Loc) const
Decompose the specified location into a raw FileID + Offset pair.
Engages in a tight little dance with the lexer to efficiently preprocess tokens.
Definition: Preprocessor.h:98
Qualifiers::ObjCLifetime getObjCLifetime() const
Returns lifetime attribute of this type.
Definition: Type.h:1028
ObjCCategoryDecl * FindCategoryDeclaration(IdentifierInfo *CategoryId) const
FindCategoryDeclaration - Finds category declaration in the list of categories for this class and ret...
Definition: DeclObjC.cpp:1615