clang  7.0.0svn
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 /// 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 = 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);
654  makePropertyAttributesAsWritten(AttributesAsWritten));
655 
656  if (Attributes & ObjCDeclSpec::DQ_PR_readonly)
658 
659  if (Attributes & ObjCDeclSpec::DQ_PR_getter)
661 
662  if (Attributes & ObjCDeclSpec::DQ_PR_setter)
664 
665  if (isReadWrite)
667 
668  if (Attributes & ObjCDeclSpec::DQ_PR_retain)
670 
671  if (Attributes & ObjCDeclSpec::DQ_PR_strong)
673 
674  if (Attributes & ObjCDeclSpec::DQ_PR_weak)
676 
677  if (Attributes & ObjCDeclSpec::DQ_PR_copy)
679 
680  if (Attributes & ObjCDeclSpec::DQ_PR_unsafe_unretained)
682 
683  if (isAssign)
685 
686  // In the semantic attributes, one of nonatomic or atomic is always set.
687  if (Attributes & ObjCDeclSpec::DQ_PR_nonatomic)
689  else
691 
692  // 'unsafe_unretained' is alias for 'assign'.
693  if (Attributes & ObjCDeclSpec::DQ_PR_unsafe_unretained)
695  if (isAssign)
697 
698  if (MethodImplKind == tok::objc_required)
700  else if (MethodImplKind == tok::objc_optional)
702 
703  if (Attributes & ObjCDeclSpec::DQ_PR_nullability)
705 
706  if (Attributes & ObjCDeclSpec::DQ_PR_null_resettable)
708 
709  if (Attributes & ObjCDeclSpec::DQ_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 static bool
818 isIncompatiblePropertyAttribute(unsigned Attr1, unsigned Attr2,
820  return (Attr1 & Kind) != (Attr2 & Kind);
821 }
822 
823 static bool areIncompatiblePropertyAttributes(unsigned Attr1, unsigned Attr2,
824  unsigned Kinds) {
825  return ((Attr1 & Kinds) != 0) != ((Attr2 & Kinds) != 0);
826 }
827 
828 /// SelectPropertyForSynthesisFromProtocols - Finds the most appropriate
829 /// property declaration that should be synthesised in all of the inherited
830 /// protocols. It also diagnoses properties declared in inherited protocols with
831 /// mismatched types or attributes, since any of them can be candidate for
832 /// synthesis.
833 static ObjCPropertyDecl *
835  ObjCInterfaceDecl *ClassDecl,
837  assert(isa<ObjCProtocolDecl>(Property->getDeclContext()) &&
838  "Expected a property from a protocol");
841  for (const auto *PI : ClassDecl->all_referenced_protocols()) {
842  if (const ObjCProtocolDecl *PDecl = PI->getDefinition())
843  PDecl->collectInheritedProtocolProperties(Property, ProtocolSet,
844  Properties);
845  }
846  if (ObjCInterfaceDecl *SDecl = ClassDecl->getSuperClass()) {
847  while (SDecl) {
848  for (const auto *PI : SDecl->all_referenced_protocols()) {
849  if (const ObjCProtocolDecl *PDecl = PI->getDefinition())
850  PDecl->collectInheritedProtocolProperties(Property, ProtocolSet,
851  Properties);
852  }
853  SDecl = SDecl->getSuperClass();
854  }
855  }
856 
857  if (Properties.empty())
858  return Property;
859 
860  ObjCPropertyDecl *OriginalProperty = Property;
861  size_t SelectedIndex = 0;
862  for (const auto &Prop : llvm::enumerate(Properties)) {
863  // Select the 'readwrite' property if such property exists.
864  if (Property->isReadOnly() && !Prop.value()->isReadOnly()) {
865  Property = Prop.value();
866  SelectedIndex = Prop.index();
867  }
868  }
869  if (Property != OriginalProperty) {
870  // Check that the old property is compatible with the new one.
871  Properties[SelectedIndex] = OriginalProperty;
872  }
873 
874  QualType RHSType = S.Context.getCanonicalType(Property->getType());
875  unsigned OriginalAttributes = Property->getPropertyAttributesAsWritten();
876  enum MismatchKind {
877  IncompatibleType = 0,
878  HasNoExpectedAttribute,
879  HasUnexpectedAttribute,
880  DifferentGetter,
881  DifferentSetter
882  };
883  // Represents a property from another protocol that conflicts with the
884  // selected declaration.
885  struct MismatchingProperty {
886  const ObjCPropertyDecl *Prop;
887  MismatchKind Kind;
888  StringRef AttributeName;
889  };
891  for (ObjCPropertyDecl *Prop : Properties) {
892  // Verify the property attributes.
893  unsigned Attr = Prop->getPropertyAttributesAsWritten();
894  if (Attr != OriginalAttributes) {
895  auto Diag = [&](bool OriginalHasAttribute, StringRef AttributeName) {
896  MismatchKind Kind = OriginalHasAttribute ? HasNoExpectedAttribute
897  : HasUnexpectedAttribute;
898  Mismatches.push_back({Prop, Kind, AttributeName});
899  };
900  // The ownership might be incompatible unless the property has no explicit
901  // ownership.
902  bool HasOwnership = (Attr & (ObjCPropertyDecl::OBJC_PR_retain |
908  if (HasOwnership &&
909  isIncompatiblePropertyAttribute(OriginalAttributes, Attr,
911  Diag(OriginalAttributes & ObjCPropertyDecl::OBJC_PR_copy, "copy");
912  continue;
913  }
914  if (HasOwnership && areIncompatiblePropertyAttributes(
915  OriginalAttributes, Attr,
918  Diag(OriginalAttributes & (ObjCPropertyDecl::OBJC_PR_retain |
920  "retain (or strong)");
921  continue;
922  }
923  if (isIncompatiblePropertyAttribute(OriginalAttributes, Attr,
925  Diag(OriginalAttributes & ObjCPropertyDecl::OBJC_PR_atomic, "atomic");
926  continue;
927  }
928  }
929  if (Property->getGetterName() != Prop->getGetterName()) {
930  Mismatches.push_back({Prop, DifferentGetter, ""});
931  continue;
932  }
933  if (!Property->isReadOnly() && !Prop->isReadOnly() &&
934  Property->getSetterName() != Prop->getSetterName()) {
935  Mismatches.push_back({Prop, DifferentSetter, ""});
936  continue;
937  }
938  QualType LHSType = S.Context.getCanonicalType(Prop->getType());
939  if (!S.Context.propertyTypesAreCompatible(LHSType, RHSType)) {
940  bool IncompatibleObjC = false;
941  QualType ConvertedType;
942  if (!S.isObjCPointerConversion(RHSType, LHSType, ConvertedType, IncompatibleObjC)
943  || IncompatibleObjC) {
944  Mismatches.push_back({Prop, IncompatibleType, ""});
945  continue;
946  }
947  }
948  }
949 
950  if (Mismatches.empty())
951  return Property;
952 
953  // Diagnose incompability.
954  {
955  bool HasIncompatibleAttributes = false;
956  for (const auto &Note : Mismatches)
957  HasIncompatibleAttributes =
958  Note.Kind != IncompatibleType ? true : HasIncompatibleAttributes;
959  // Promote the warning to an error if there are incompatible attributes or
960  // incompatible types together with readwrite/readonly incompatibility.
961  auto Diag = S.Diag(Property->getLocation(),
962  Property != OriginalProperty || HasIncompatibleAttributes
963  ? diag::err_protocol_property_mismatch
964  : diag::warn_protocol_property_mismatch);
965  Diag << Mismatches[0].Kind;
966  switch (Mismatches[0].Kind) {
967  case IncompatibleType:
968  Diag << Property->getType();
969  break;
970  case HasNoExpectedAttribute:
971  case HasUnexpectedAttribute:
972  Diag << Mismatches[0].AttributeName;
973  break;
974  case DifferentGetter:
975  Diag << Property->getGetterName();
976  break;
977  case DifferentSetter:
978  Diag << Property->getSetterName();
979  break;
980  }
981  }
982  for (const auto &Note : Mismatches) {
983  auto Diag =
984  S.Diag(Note.Prop->getLocation(), diag::note_protocol_property_declare)
985  << Note.Kind;
986  switch (Note.Kind) {
987  case IncompatibleType:
988  Diag << Note.Prop->getType();
989  break;
990  case HasNoExpectedAttribute:
991  case HasUnexpectedAttribute:
992  Diag << Note.AttributeName;
993  break;
994  case DifferentGetter:
995  Diag << Note.Prop->getGetterName();
996  break;
997  case DifferentSetter:
998  Diag << Note.Prop->getSetterName();
999  break;
1000  }
1001  }
1002  if (AtLoc.isValid())
1003  S.Diag(AtLoc, diag::note_property_synthesize);
1004 
1005  return Property;
1006 }
1007 
1008 /// Determine whether any storage attributes were written on the property.
1010  ObjCPropertyQueryKind QueryKind) {
1011  if (Prop->getPropertyAttributesAsWritten() & OwnershipMask) return true;
1012 
1013  // If this is a readwrite property in a class extension that refines
1014  // a readonly property in the original class definition, check it as
1015  // well.
1016 
1017  // If it's a readonly property, we're not interested.
1018  if (Prop->isReadOnly()) return false;
1019 
1020  // Is it declared in an extension?
1021  auto Category = dyn_cast<ObjCCategoryDecl>(Prop->getDeclContext());
1022  if (!Category || !Category->IsClassExtension()) return false;
1023 
1024  // Find the corresponding property in the primary class definition.
1025  auto OrigClass = Category->getClassInterface();
1026  for (auto Found : OrigClass->lookup(Prop->getDeclName())) {
1027  if (ObjCPropertyDecl *OrigProp = dyn_cast<ObjCPropertyDecl>(Found))
1028  return OrigProp->getPropertyAttributesAsWritten() & OwnershipMask;
1029  }
1030 
1031  // Look through all of the protocols.
1032  for (const auto *Proto : OrigClass->all_referenced_protocols()) {
1033  if (ObjCPropertyDecl *OrigProp = Proto->FindPropertyDeclaration(
1034  Prop->getIdentifier(), QueryKind))
1035  return OrigProp->getPropertyAttributesAsWritten() & OwnershipMask;
1036  }
1037 
1038  return false;
1039 }
1040 
1041 /// ActOnPropertyImplDecl - This routine performs semantic checks and
1042 /// builds the AST node for a property implementation declaration; declared
1043 /// as \@synthesize or \@dynamic.
1044 ///
1046  SourceLocation AtLoc,
1047  SourceLocation PropertyLoc,
1048  bool Synthesize,
1049  IdentifierInfo *PropertyId,
1050  IdentifierInfo *PropertyIvar,
1051  SourceLocation PropertyIvarLoc,
1052  ObjCPropertyQueryKind QueryKind) {
1053  ObjCContainerDecl *ClassImpDecl =
1054  dyn_cast<ObjCContainerDecl>(CurContext);
1055  // Make sure we have a context for the property implementation declaration.
1056  if (!ClassImpDecl) {
1057  Diag(AtLoc, diag::err_missing_property_context);
1058  return nullptr;
1059  }
1060  if (PropertyIvarLoc.isInvalid())
1061  PropertyIvarLoc = PropertyLoc;
1062  SourceLocation PropertyDiagLoc = PropertyLoc;
1063  if (PropertyDiagLoc.isInvalid())
1064  PropertyDiagLoc = ClassImpDecl->getLocStart();
1065  ObjCPropertyDecl *property = nullptr;
1066  ObjCInterfaceDecl *IDecl = nullptr;
1067  // Find the class or category class where this property must have
1068  // a declaration.
1069  ObjCImplementationDecl *IC = nullptr;
1070  ObjCCategoryImplDecl *CatImplClass = nullptr;
1071  if ((IC = dyn_cast<ObjCImplementationDecl>(ClassImpDecl))) {
1072  IDecl = IC->getClassInterface();
1073  // We always synthesize an interface for an implementation
1074  // without an interface decl. So, IDecl is always non-zero.
1075  assert(IDecl &&
1076  "ActOnPropertyImplDecl - @implementation without @interface");
1077 
1078  // Look for this property declaration in the @implementation's @interface
1079  property = IDecl->FindPropertyDeclaration(PropertyId, QueryKind);
1080  if (!property) {
1081  Diag(PropertyLoc, diag::err_bad_property_decl) << IDecl->getDeclName();
1082  return nullptr;
1083  }
1084  if (property->isClassProperty() && Synthesize) {
1085  Diag(PropertyLoc, diag::err_synthesize_on_class_property) << PropertyId;
1086  return nullptr;
1087  }
1088  unsigned PIkind = property->getPropertyAttributesAsWritten();
1089  if ((PIkind & (ObjCPropertyDecl::OBJC_PR_atomic |
1091  if (AtLoc.isValid())
1092  Diag(AtLoc, diag::warn_implicit_atomic_property);
1093  else
1094  Diag(IC->getLocation(), diag::warn_auto_implicit_atomic_property);
1095  Diag(property->getLocation(), diag::note_property_declare);
1096  }
1097 
1098  if (const ObjCCategoryDecl *CD =
1099  dyn_cast<ObjCCategoryDecl>(property->getDeclContext())) {
1100  if (!CD->IsClassExtension()) {
1101  Diag(PropertyLoc, diag::err_category_property) << CD->getDeclName();
1102  Diag(property->getLocation(), diag::note_property_declare);
1103  return nullptr;
1104  }
1105  }
1106  if (Synthesize&&
1108  property->hasAttr<IBOutletAttr>() &&
1109  !AtLoc.isValid()) {
1110  bool ReadWriteProperty = false;
1111  // Search into the class extensions and see if 'readonly property is
1112  // redeclared 'readwrite', then no warning is to be issued.
1113  for (auto *Ext : IDecl->known_extensions()) {
1114  DeclContext::lookup_result R = Ext->lookup(property->getDeclName());
1115  if (!R.empty())
1116  if (ObjCPropertyDecl *ExtProp = dyn_cast<ObjCPropertyDecl>(R[0])) {
1117  PIkind = ExtProp->getPropertyAttributesAsWritten();
1118  if (PIkind & ObjCPropertyDecl::OBJC_PR_readwrite) {
1119  ReadWriteProperty = true;
1120  break;
1121  }
1122  }
1123  }
1124 
1125  if (!ReadWriteProperty) {
1126  Diag(property->getLocation(), diag::warn_auto_readonly_iboutlet_property)
1127  << property;
1128  SourceLocation readonlyLoc;
1129  if (LocPropertyAttribute(Context, "readonly",
1130  property->getLParenLoc(), readonlyLoc)) {
1131  SourceLocation endLoc =
1132  readonlyLoc.getLocWithOffset(strlen("readonly")-1);
1133  SourceRange ReadonlySourceRange(readonlyLoc, endLoc);
1134  Diag(property->getLocation(),
1135  diag::note_auto_readonly_iboutlet_fixup_suggest) <<
1136  FixItHint::CreateReplacement(ReadonlySourceRange, "readwrite");
1137  }
1138  }
1139  }
1140  if (Synthesize && isa<ObjCProtocolDecl>(property->getDeclContext()))
1141  property = SelectPropertyForSynthesisFromProtocols(*this, AtLoc, IDecl,
1142  property);
1143 
1144  } else if ((CatImplClass = dyn_cast<ObjCCategoryImplDecl>(ClassImpDecl))) {
1145  if (Synthesize) {
1146  Diag(AtLoc, diag::err_synthesize_category_decl);
1147  return nullptr;
1148  }
1149  IDecl = CatImplClass->getClassInterface();
1150  if (!IDecl) {
1151  Diag(AtLoc, diag::err_missing_property_interface);
1152  return nullptr;
1153  }
1155  IDecl->FindCategoryDeclaration(CatImplClass->getIdentifier());
1156 
1157  // If category for this implementation not found, it is an error which
1158  // has already been reported eralier.
1159  if (!Category)
1160  return nullptr;
1161  // Look for this property declaration in @implementation's category
1162  property = Category->FindPropertyDeclaration(PropertyId, QueryKind);
1163  if (!property) {
1164  Diag(PropertyLoc, diag::err_bad_category_property_decl)
1165  << Category->getDeclName();
1166  return nullptr;
1167  }
1168  } else {
1169  Diag(AtLoc, diag::err_bad_property_context);
1170  return nullptr;
1171  }
1172  ObjCIvarDecl *Ivar = nullptr;
1173  bool CompleteTypeErr = false;
1174  bool compat = true;
1175  // Check that we have a valid, previously declared ivar for @synthesize
1176  if (Synthesize) {
1177  // @synthesize
1178  if (!PropertyIvar)
1179  PropertyIvar = PropertyId;
1180  // Check that this is a previously declared 'ivar' in 'IDecl' interface
1181  ObjCInterfaceDecl *ClassDeclared;
1182  Ivar = IDecl->lookupInstanceVariable(PropertyIvar, ClassDeclared);
1183  QualType PropType = property->getType();
1184  QualType PropertyIvarType = PropType.getNonReferenceType();
1185 
1186  if (RequireCompleteType(PropertyDiagLoc, PropertyIvarType,
1187  diag::err_incomplete_synthesized_property,
1188  property->getDeclName())) {
1189  Diag(property->getLocation(), diag::note_property_declare);
1190  CompleteTypeErr = true;
1191  }
1192 
1193  if (getLangOpts().ObjCAutoRefCount &&
1194  (property->getPropertyAttributesAsWritten() &
1196  PropertyIvarType->isObjCRetainableType()) {
1198  }
1199 
1201  = property->getPropertyAttributes();
1202 
1203  bool isARCWeak = false;
1204  if (kind & ObjCPropertyDecl::OBJC_PR_weak) {
1205  // Add GC __weak to the ivar type if the property is weak.
1206  if (getLangOpts().getGC() != LangOptions::NonGC) {
1207  assert(!getLangOpts().ObjCAutoRefCount);
1208  if (PropertyIvarType.isObjCGCStrong()) {
1209  Diag(PropertyDiagLoc, diag::err_gc_weak_property_strong_type);
1210  Diag(property->getLocation(), diag::note_property_declare);
1211  } else {
1212  PropertyIvarType =
1213  Context.getObjCGCQualType(PropertyIvarType, Qualifiers::Weak);
1214  }
1215 
1216  // Otherwise, check whether ARC __weak is enabled and works with
1217  // the property type.
1218  } else {
1219  if (!getLangOpts().ObjCWeak) {
1220  // Only complain here when synthesizing an ivar.
1221  if (!Ivar) {
1222  Diag(PropertyDiagLoc,
1223  getLangOpts().ObjCWeakRuntime
1224  ? diag::err_synthesizing_arc_weak_property_disabled
1225  : diag::err_synthesizing_arc_weak_property_no_runtime);
1226  Diag(property->getLocation(), diag::note_property_declare);
1227  }
1228  CompleteTypeErr = true; // suppress later diagnostics about the ivar
1229  } else {
1230  isARCWeak = true;
1231  if (const ObjCObjectPointerType *ObjT =
1232  PropertyIvarType->getAs<ObjCObjectPointerType>()) {
1233  const ObjCInterfaceDecl *ObjI = ObjT->getInterfaceDecl();
1234  if (ObjI && ObjI->isArcWeakrefUnavailable()) {
1235  Diag(property->getLocation(),
1236  diag::err_arc_weak_unavailable_property)
1237  << PropertyIvarType;
1238  Diag(ClassImpDecl->getLocation(), diag::note_implemented_by_class)
1239  << ClassImpDecl->getName();
1240  }
1241  }
1242  }
1243  }
1244  }
1245 
1246  if (AtLoc.isInvalid()) {
1247  // Check when default synthesizing a property that there is
1248  // an ivar matching property name and issue warning; since this
1249  // is the most common case of not using an ivar used for backing
1250  // property in non-default synthesis case.
1251  ObjCInterfaceDecl *ClassDeclared=nullptr;
1252  ObjCIvarDecl *originalIvar =
1253  IDecl->lookupInstanceVariable(property->getIdentifier(),
1254  ClassDeclared);
1255  if (originalIvar) {
1256  Diag(PropertyDiagLoc,
1257  diag::warn_autosynthesis_property_ivar_match)
1258  << PropertyId << (Ivar == nullptr) << PropertyIvar
1259  << originalIvar->getIdentifier();
1260  Diag(property->getLocation(), diag::note_property_declare);
1261  Diag(originalIvar->getLocation(), diag::note_ivar_decl);
1262  }
1263  }
1264 
1265  if (!Ivar) {
1266  // In ARC, give the ivar a lifetime qualifier based on the
1267  // property attributes.
1268  if ((getLangOpts().ObjCAutoRefCount || isARCWeak) &&
1269  !PropertyIvarType.getObjCLifetime() &&
1270  PropertyIvarType->isObjCRetainableType()) {
1271 
1272  // It's an error if we have to do this and the user didn't
1273  // explicitly write an ownership attribute on the property.
1274  if (!hasWrittenStorageAttribute(property, QueryKind) &&
1276  Diag(PropertyDiagLoc,
1277  diag::err_arc_objc_property_default_assign_on_object);
1278  Diag(property->getLocation(), diag::note_property_declare);
1279  } else {
1280  Qualifiers::ObjCLifetime lifetime =
1281  getImpliedARCOwnership(kind, PropertyIvarType);
1282  assert(lifetime && "no lifetime for property?");
1283 
1284  Qualifiers qs;
1285  qs.addObjCLifetime(lifetime);
1286  PropertyIvarType = Context.getQualifiedType(PropertyIvarType, qs);
1287  }
1288  }
1289 
1290  Ivar = ObjCIvarDecl::Create(Context, ClassImpDecl,
1291  PropertyIvarLoc,PropertyIvarLoc, PropertyIvar,
1292  PropertyIvarType, /*Dinfo=*/nullptr,
1294  (Expr *)nullptr, true);
1295  if (RequireNonAbstractType(PropertyIvarLoc,
1296  PropertyIvarType,
1297  diag::err_abstract_type_in_decl,
1299  Diag(property->getLocation(), diag::note_property_declare);
1300  // An abstract type is as bad as an incomplete type.
1301  CompleteTypeErr = true;
1302  }
1303  if (!CompleteTypeErr) {
1304  const RecordType *RecordTy = PropertyIvarType->getAs<RecordType>();
1305  if (RecordTy && RecordTy->getDecl()->hasFlexibleArrayMember()) {
1306  Diag(PropertyIvarLoc, diag::err_synthesize_variable_sized_ivar)
1307  << PropertyIvarType;
1308  CompleteTypeErr = true; // suppress later diagnostics about the ivar
1309  }
1310  }
1311  if (CompleteTypeErr)
1312  Ivar->setInvalidDecl();
1313  ClassImpDecl->addDecl(Ivar);
1314  IDecl->makeDeclVisibleInContext(Ivar);
1315 
1317  Diag(PropertyDiagLoc, diag::err_missing_property_ivar_decl)
1318  << PropertyId;
1319  // Note! I deliberately want it to fall thru so, we have a
1320  // a property implementation and to avoid future warnings.
1321  } else if (getLangOpts().ObjCRuntime.isNonFragile() &&
1322  !declaresSameEntity(ClassDeclared, IDecl)) {
1323  Diag(PropertyDiagLoc, diag::err_ivar_in_superclass_use)
1324  << property->getDeclName() << Ivar->getDeclName()
1325  << ClassDeclared->getDeclName();
1326  Diag(Ivar->getLocation(), diag::note_previous_access_declaration)
1327  << Ivar << Ivar->getName();
1328  // Note! I deliberately want it to fall thru so more errors are caught.
1329  }
1330  property->setPropertyIvarDecl(Ivar);
1331 
1332  QualType IvarType = Context.getCanonicalType(Ivar->getType());
1333 
1334  // Check that type of property and its ivar are type compatible.
1335  if (!Context.hasSameType(PropertyIvarType, IvarType)) {
1336  if (isa<ObjCObjectPointerType>(PropertyIvarType)
1337  && isa<ObjCObjectPointerType>(IvarType))
1338  compat =
1340  PropertyIvarType->getAs<ObjCObjectPointerType>(),
1341  IvarType->getAs<ObjCObjectPointerType>());
1342  else {
1343  compat = (CheckAssignmentConstraints(PropertyIvarLoc, PropertyIvarType,
1344  IvarType)
1345  == Compatible);
1346  }
1347  if (!compat) {
1348  Diag(PropertyDiagLoc, diag::err_property_ivar_type)
1349  << property->getDeclName() << PropType
1350  << Ivar->getDeclName() << IvarType;
1351  Diag(Ivar->getLocation(), diag::note_ivar_decl);
1352  // Note! I deliberately want it to fall thru so, we have a
1353  // a property implementation and to avoid future warnings.
1354  }
1355  else {
1356  // FIXME! Rules for properties are somewhat different that those
1357  // for assignments. Use a new routine to consolidate all cases;
1358  // specifically for property redeclarations as well as for ivars.
1359  QualType lhsType =Context.getCanonicalType(PropertyIvarType).getUnqualifiedType();
1360  QualType rhsType =Context.getCanonicalType(IvarType).getUnqualifiedType();
1361  if (lhsType != rhsType &&
1362  lhsType->isArithmeticType()) {
1363  Diag(PropertyDiagLoc, diag::err_property_ivar_type)
1364  << property->getDeclName() << PropType
1365  << Ivar->getDeclName() << IvarType;
1366  Diag(Ivar->getLocation(), diag::note_ivar_decl);
1367  // Fall thru - see previous comment
1368  }
1369  }
1370  // __weak is explicit. So it works on Canonical type.
1371  if ((PropType.isObjCGCWeak() && !IvarType.isObjCGCWeak() &&
1372  getLangOpts().getGC() != LangOptions::NonGC)) {
1373  Diag(PropertyDiagLoc, diag::err_weak_property)
1374  << property->getDeclName() << Ivar->getDeclName();
1375  Diag(Ivar->getLocation(), diag::note_ivar_decl);
1376  // Fall thru - see previous comment
1377  }
1378  // Fall thru - see previous comment
1379  if ((property->getType()->isObjCObjectPointerType() ||
1380  PropType.isObjCGCStrong()) && IvarType.isObjCGCWeak() &&
1381  getLangOpts().getGC() != LangOptions::NonGC) {
1382  Diag(PropertyDiagLoc, diag::err_strong_property)
1383  << property->getDeclName() << Ivar->getDeclName();
1384  // Fall thru - see previous comment
1385  }
1386  }
1387  if (getLangOpts().ObjCAutoRefCount || isARCWeak ||
1388  Ivar->getType().getObjCLifetime())
1389  checkARCPropertyImpl(*this, PropertyLoc, property, Ivar);
1390  } else if (PropertyIvar)
1391  // @dynamic
1392  Diag(PropertyDiagLoc, diag::err_dynamic_property_ivar_decl);
1393 
1394  assert (property && "ActOnPropertyImplDecl - property declaration missing");
1395  ObjCPropertyImplDecl *PIDecl =
1396  ObjCPropertyImplDecl::Create(Context, CurContext, AtLoc, PropertyLoc,
1397  property,
1398  (Synthesize ?
1401  Ivar, PropertyIvarLoc);
1402 
1403  if (CompleteTypeErr || !compat)
1404  PIDecl->setInvalidDecl();
1405 
1406  if (ObjCMethodDecl *getterMethod = property->getGetterMethodDecl()) {
1407  getterMethod->createImplicitParams(Context, IDecl);
1408  if (getLangOpts().CPlusPlus && Synthesize && !CompleteTypeErr &&
1409  Ivar->getType()->isRecordType()) {
1410  // For Objective-C++, need to synthesize the AST for the IVAR object to be
1411  // returned by the getter as it must conform to C++'s copy-return rules.
1412  // FIXME. Eventually we want to do this for Objective-C as well.
1413  SynthesizedFunctionScope Scope(*this, getterMethod);
1414  ImplicitParamDecl *SelfDecl = getterMethod->getSelfDecl();
1415  DeclRefExpr *SelfExpr =
1416  new (Context) DeclRefExpr(SelfDecl, false, SelfDecl->getType(),
1417  VK_LValue, PropertyDiagLoc);
1418  MarkDeclRefReferenced(SelfExpr);
1419  Expr *LoadSelfExpr =
1421  CK_LValueToRValue, SelfExpr, nullptr,
1422  VK_RValue);
1423  Expr *IvarRefExpr =
1424  new (Context) ObjCIvarRefExpr(Ivar,
1425  Ivar->getUsageType(SelfDecl->getType()),
1426  PropertyDiagLoc,
1427  Ivar->getLocation(),
1428  LoadSelfExpr, true, true);
1430  InitializedEntity::InitializeResult(PropertyDiagLoc,
1431  getterMethod->getReturnType(),
1432  /*NRVO=*/false),
1433  PropertyDiagLoc, IvarRefExpr);
1434  if (!Res.isInvalid()) {
1435  Expr *ResExpr = Res.getAs<Expr>();
1436  if (ResExpr)
1437  ResExpr = MaybeCreateExprWithCleanups(ResExpr);
1438  PIDecl->setGetterCXXConstructor(ResExpr);
1439  }
1440  }
1441  if (property->hasAttr<NSReturnsNotRetainedAttr>() &&
1442  !getterMethod->hasAttr<NSReturnsNotRetainedAttr>()) {
1443  Diag(getterMethod->getLocation(),
1444  diag::warn_property_getter_owning_mismatch);
1445  Diag(property->getLocation(), diag::note_property_declare);
1446  }
1447  if (getLangOpts().ObjCAutoRefCount && Synthesize)
1448  switch (getterMethod->getMethodFamily()) {
1449  case OMF_retain:
1450  case OMF_retainCount:
1451  case OMF_release:
1452  case OMF_autorelease:
1453  Diag(getterMethod->getLocation(), diag::err_arc_illegal_method_def)
1454  << 1 << getterMethod->getSelector();
1455  break;
1456  default:
1457  break;
1458  }
1459  }
1460  if (ObjCMethodDecl *setterMethod = property->getSetterMethodDecl()) {
1461  setterMethod->createImplicitParams(Context, IDecl);
1462  if (getLangOpts().CPlusPlus && Synthesize && !CompleteTypeErr &&
1463  Ivar->getType()->isRecordType()) {
1464  // FIXME. Eventually we want to do this for Objective-C as well.
1465  SynthesizedFunctionScope Scope(*this, setterMethod);
1466  ImplicitParamDecl *SelfDecl = setterMethod->getSelfDecl();
1467  DeclRefExpr *SelfExpr =
1468  new (Context) DeclRefExpr(SelfDecl, false, SelfDecl->getType(),
1469  VK_LValue, PropertyDiagLoc);
1470  MarkDeclRefReferenced(SelfExpr);
1471  Expr *LoadSelfExpr =
1473  CK_LValueToRValue, SelfExpr, nullptr,
1474  VK_RValue);
1475  Expr *lhs =
1476  new (Context) ObjCIvarRefExpr(Ivar,
1477  Ivar->getUsageType(SelfDecl->getType()),
1478  PropertyDiagLoc,
1479  Ivar->getLocation(),
1480  LoadSelfExpr, true, true);
1481  ObjCMethodDecl::param_iterator P = setterMethod->param_begin();
1482  ParmVarDecl *Param = (*P);
1483  QualType T = Param->getType().getNonReferenceType();
1484  DeclRefExpr *rhs = new (Context) DeclRefExpr(Param, false, T,
1485  VK_LValue, PropertyDiagLoc);
1486  MarkDeclRefReferenced(rhs);
1487  ExprResult Res = BuildBinOp(S, PropertyDiagLoc,
1488  BO_Assign, lhs, rhs);
1489  if (property->getPropertyAttributes() &
1491  Expr *callExpr = Res.getAs<Expr>();
1492  if (const CXXOperatorCallExpr *CXXCE =
1493  dyn_cast_or_null<CXXOperatorCallExpr>(callExpr))
1494  if (const FunctionDecl *FuncDecl = CXXCE->getDirectCallee())
1495  if (!FuncDecl->isTrivial())
1496  if (property->getType()->isReferenceType()) {
1497  Diag(PropertyDiagLoc,
1498  diag::err_atomic_property_nontrivial_assign_op)
1499  << property->getType();
1500  Diag(FuncDecl->getLocStart(),
1501  diag::note_callee_decl) << FuncDecl;
1502  }
1503  }
1504  PIDecl->setSetterCXXAssignment(Res.getAs<Expr>());
1505  }
1506  }
1507 
1508  if (IC) {
1509  if (Synthesize)
1510  if (ObjCPropertyImplDecl *PPIDecl =
1511  IC->FindPropertyImplIvarDecl(PropertyIvar)) {
1512  Diag(PropertyLoc, diag::err_duplicate_ivar_use)
1513  << PropertyId << PPIDecl->getPropertyDecl()->getIdentifier()
1514  << PropertyIvar;
1515  Diag(PPIDecl->getLocation(), diag::note_previous_use);
1516  }
1517 
1518  if (ObjCPropertyImplDecl *PPIDecl
1519  = IC->FindPropertyImplDecl(PropertyId, QueryKind)) {
1520  Diag(PropertyLoc, diag::err_property_implemented) << PropertyId;
1521  Diag(PPIDecl->getLocation(), diag::note_previous_declaration);
1522  return nullptr;
1523  }
1524  IC->addPropertyImplementation(PIDecl);
1525  if (getLangOpts().ObjCDefaultSynthProperties &&
1527  !IDecl->isObjCRequiresPropertyDefs()) {
1528  // Diagnose if an ivar was lazily synthesdized due to a previous
1529  // use and if 1) property is @dynamic or 2) property is synthesized
1530  // but it requires an ivar of different name.
1531  ObjCInterfaceDecl *ClassDeclared=nullptr;
1532  ObjCIvarDecl *Ivar = nullptr;
1533  if (!Synthesize)
1534  Ivar = IDecl->lookupInstanceVariable(PropertyId, ClassDeclared);
1535  else {
1536  if (PropertyIvar && PropertyIvar != PropertyId)
1537  Ivar = IDecl->lookupInstanceVariable(PropertyId, ClassDeclared);
1538  }
1539  // Issue diagnostics only if Ivar belongs to current class.
1540  if (Ivar && Ivar->getSynthesize() &&
1541  declaresSameEntity(IC->getClassInterface(), ClassDeclared)) {
1542  Diag(Ivar->getLocation(), diag::err_undeclared_var_use)
1543  << PropertyId;
1544  Ivar->setInvalidDecl();
1545  }
1546  }
1547  } else {
1548  if (Synthesize)
1549  if (ObjCPropertyImplDecl *PPIDecl =
1550  CatImplClass->FindPropertyImplIvarDecl(PropertyIvar)) {
1551  Diag(PropertyDiagLoc, diag::err_duplicate_ivar_use)
1552  << PropertyId << PPIDecl->getPropertyDecl()->getIdentifier()
1553  << PropertyIvar;
1554  Diag(PPIDecl->getLocation(), diag::note_previous_use);
1555  }
1556 
1557  if (ObjCPropertyImplDecl *PPIDecl =
1558  CatImplClass->FindPropertyImplDecl(PropertyId, QueryKind)) {
1559  Diag(PropertyDiagLoc, diag::err_property_implemented) << PropertyId;
1560  Diag(PPIDecl->getLocation(), diag::note_previous_declaration);
1561  return nullptr;
1562  }
1563  CatImplClass->addPropertyImplementation(PIDecl);
1564  }
1565 
1566  return PIDecl;
1567 }
1568 
1569 //===----------------------------------------------------------------------===//
1570 // Helper methods.
1571 //===----------------------------------------------------------------------===//
1572 
1573 /// DiagnosePropertyMismatch - Compares two properties for their
1574 /// attributes and types and warns on a variety of inconsistencies.
1575 ///
1576 void
1578  ObjCPropertyDecl *SuperProperty,
1579  const IdentifierInfo *inheritedName,
1580  bool OverridingProtocolProperty) {
1582  Property->getPropertyAttributes();
1584  SuperProperty->getPropertyAttributes();
1585 
1586  // We allow readonly properties without an explicit ownership
1587  // (assign/unsafe_unretained/weak/retain/strong/copy) in super class
1588  // to be overridden by a property with any explicit ownership in the subclass.
1589  if (!OverridingProtocolProperty &&
1590  !getOwnershipRule(SAttr) && getOwnershipRule(CAttr))
1591  ;
1592  else {
1595  Diag(Property->getLocation(), diag::warn_readonly_property)
1596  << Property->getDeclName() << inheritedName;
1597  if ((CAttr & ObjCPropertyDecl::OBJC_PR_copy)
1598  != (SAttr & ObjCPropertyDecl::OBJC_PR_copy))
1599  Diag(Property->getLocation(), diag::warn_property_attribute)
1600  << Property->getDeclName() << "copy" << inheritedName;
1601  else if (!(SAttr & ObjCPropertyDecl::OBJC_PR_readonly)){
1602  unsigned CAttrRetain =
1603  (CAttr &
1605  unsigned SAttrRetain =
1606  (SAttr &
1608  bool CStrong = (CAttrRetain != 0);
1609  bool SStrong = (SAttrRetain != 0);
1610  if (CStrong != SStrong)
1611  Diag(Property->getLocation(), diag::warn_property_attribute)
1612  << Property->getDeclName() << "retain (or strong)" << inheritedName;
1613  }
1614  }
1615 
1616  // Check for nonatomic; note that nonatomic is effectively
1617  // meaningless for readonly properties, so don't diagnose if the
1618  // atomic property is 'readonly'.
1619  checkAtomicPropertyMismatch(*this, SuperProperty, Property, false);
1620  // Readonly properties from protocols can be implemented as "readwrite"
1621  // with a custom setter name.
1622  if (Property->getSetterName() != SuperProperty->getSetterName() &&
1623  !(SuperProperty->isReadOnly() &&
1624  isa<ObjCProtocolDecl>(SuperProperty->getDeclContext()))) {
1625  Diag(Property->getLocation(), diag::warn_property_attribute)
1626  << Property->getDeclName() << "setter" << inheritedName;
1627  Diag(SuperProperty->getLocation(), diag::note_property_declare);
1628  }
1629  if (Property->getGetterName() != SuperProperty->getGetterName()) {
1630  Diag(Property->getLocation(), diag::warn_property_attribute)
1631  << Property->getDeclName() << "getter" << inheritedName;
1632  Diag(SuperProperty->getLocation(), diag::note_property_declare);
1633  }
1634 
1635  QualType LHSType =
1636  Context.getCanonicalType(SuperProperty->getType());
1637  QualType RHSType =
1638  Context.getCanonicalType(Property->getType());
1639 
1640  if (!Context.propertyTypesAreCompatible(LHSType, RHSType)) {
1641  // Do cases not handled in above.
1642  // FIXME. For future support of covariant property types, revisit this.
1643  bool IncompatibleObjC = false;
1644  QualType ConvertedType;
1645  if (!isObjCPointerConversion(RHSType, LHSType,
1646  ConvertedType, IncompatibleObjC) ||
1647  IncompatibleObjC) {
1648  Diag(Property->getLocation(), diag::warn_property_types_are_incompatible)
1649  << Property->getType() << SuperProperty->getType() << inheritedName;
1650  Diag(SuperProperty->getLocation(), diag::note_property_declare);
1651  }
1652  }
1653 }
1654 
1656  ObjCMethodDecl *GetterMethod,
1657  SourceLocation Loc) {
1658  if (!GetterMethod)
1659  return false;
1660  QualType GetterType = GetterMethod->getReturnType().getNonReferenceType();
1661  QualType PropertyRValueType =
1662  property->getType().getNonReferenceType().getAtomicUnqualifiedType();
1663  bool compat = Context.hasSameType(PropertyRValueType, GetterType);
1664  if (!compat) {
1665  const ObjCObjectPointerType *propertyObjCPtr = nullptr;
1666  const ObjCObjectPointerType *getterObjCPtr = nullptr;
1667  if ((propertyObjCPtr =
1668  PropertyRValueType->getAs<ObjCObjectPointerType>()) &&
1669  (getterObjCPtr = GetterType->getAs<ObjCObjectPointerType>()))
1670  compat = Context.canAssignObjCInterfaces(getterObjCPtr, propertyObjCPtr);
1671  else if (CheckAssignmentConstraints(Loc, GetterType, PropertyRValueType)
1672  != Compatible) {
1673  Diag(Loc, diag::err_property_accessor_type)
1674  << property->getDeclName() << PropertyRValueType
1675  << GetterMethod->getSelector() << GetterType;
1676  Diag(GetterMethod->getLocation(), diag::note_declared_at);
1677  return true;
1678  } else {
1679  compat = true;
1680  QualType lhsType = Context.getCanonicalType(PropertyRValueType);
1681  QualType rhsType =Context.getCanonicalType(GetterType).getUnqualifiedType();
1682  if (lhsType != rhsType && lhsType->isArithmeticType())
1683  compat = false;
1684  }
1685  }
1686 
1687  if (!compat) {
1688  Diag(Loc, diag::warn_accessor_property_type_mismatch)
1689  << property->getDeclName()
1690  << GetterMethod->getSelector();
1691  Diag(GetterMethod->getLocation(), diag::note_declared_at);
1692  return true;
1693  }
1694 
1695  return false;
1696 }
1697 
1698 /// CollectImmediateProperties - This routine collects all properties in
1699 /// the class and its conforming protocols; but not those in its super class.
1700 static void
1703  ObjCContainerDecl::PropertyMap &SuperPropMap,
1704  bool CollectClassPropsOnly = false,
1705  bool IncludeProtocols = true) {
1706  if (ObjCInterfaceDecl *IDecl = dyn_cast<ObjCInterfaceDecl>(CDecl)) {
1707  for (auto *Prop : IDecl->properties()) {
1708  if (CollectClassPropsOnly && !Prop->isClassProperty())
1709  continue;
1710  PropMap[std::make_pair(Prop->getIdentifier(), Prop->isClassProperty())] =
1711  Prop;
1712  }
1713 
1714  // Collect the properties from visible extensions.
1715  for (auto *Ext : IDecl->visible_extensions())
1716  CollectImmediateProperties(Ext, PropMap, SuperPropMap,
1717  CollectClassPropsOnly, IncludeProtocols);
1718 
1719  if (IncludeProtocols) {
1720  // Scan through class's protocols.
1721  for (auto *PI : IDecl->all_referenced_protocols())
1722  CollectImmediateProperties(PI, PropMap, SuperPropMap,
1723  CollectClassPropsOnly);
1724  }
1725  }
1726  if (ObjCCategoryDecl *CATDecl = dyn_cast<ObjCCategoryDecl>(CDecl)) {
1727  for (auto *Prop : CATDecl->properties()) {
1728  if (CollectClassPropsOnly && !Prop->isClassProperty())
1729  continue;
1730  PropMap[std::make_pair(Prop->getIdentifier(), Prop->isClassProperty())] =
1731  Prop;
1732  }
1733  if (IncludeProtocols) {
1734  // Scan through class's protocols.
1735  for (auto *PI : CATDecl->protocols())
1736  CollectImmediateProperties(PI, PropMap, SuperPropMap,
1737  CollectClassPropsOnly);
1738  }
1739  }
1740  else if (ObjCProtocolDecl *PDecl = dyn_cast<ObjCProtocolDecl>(CDecl)) {
1741  for (auto *Prop : PDecl->properties()) {
1742  if (CollectClassPropsOnly && !Prop->isClassProperty())
1743  continue;
1744  ObjCPropertyDecl *PropertyFromSuper =
1745  SuperPropMap[std::make_pair(Prop->getIdentifier(),
1746  Prop->isClassProperty())];
1747  // Exclude property for protocols which conform to class's super-class,
1748  // as super-class has to implement the property.
1749  if (!PropertyFromSuper ||
1750  PropertyFromSuper->getIdentifier() != Prop->getIdentifier()) {
1751  ObjCPropertyDecl *&PropEntry =
1752  PropMap[std::make_pair(Prop->getIdentifier(),
1753  Prop->isClassProperty())];
1754  if (!PropEntry)
1755  PropEntry = Prop;
1756  }
1757  }
1758  // Scan through protocol's protocols.
1759  for (auto *PI : PDecl->protocols())
1760  CollectImmediateProperties(PI, PropMap, SuperPropMap,
1761  CollectClassPropsOnly);
1762  }
1763 }
1764 
1765 /// CollectSuperClassPropertyImplementations - This routine collects list of
1766 /// properties to be implemented in super class(s) and also coming from their
1767 /// conforming protocols.
1769  ObjCInterfaceDecl::PropertyMap &PropMap) {
1770  if (ObjCInterfaceDecl *SDecl = CDecl->getSuperClass()) {
1772  while (SDecl) {
1773  SDecl->collectPropertiesToImplement(PropMap, PO);
1774  SDecl = SDecl->getSuperClass();
1775  }
1776  }
1777 }
1778 
1779 /// IvarBacksCurrentMethodAccessor - This routine returns 'true' if 'IV' is
1780 /// an ivar synthesized for 'Method' and 'Method' is a property accessor
1781 /// declared in class 'IFace'.
1782 bool
1784  ObjCMethodDecl *Method, ObjCIvarDecl *IV) {
1785  if (!IV->getSynthesize())
1786  return false;
1787  ObjCMethodDecl *IMD = IFace->lookupMethod(Method->getSelector(),
1788  Method->isInstanceMethod());
1789  if (!IMD || !IMD->isPropertyAccessor())
1790  return false;
1791 
1792  // look up a property declaration whose one of its accessors is implemented
1793  // by this method.
1794  for (const auto *Property : IFace->instance_properties()) {
1795  if ((Property->getGetterName() == IMD->getSelector() ||
1796  Property->getSetterName() == IMD->getSelector()) &&
1797  (Property->getPropertyIvarDecl() == IV))
1798  return true;
1799  }
1800  // Also look up property declaration in class extension whose one of its
1801  // accessors is implemented by this method.
1802  for (const auto *Ext : IFace->known_extensions())
1803  for (const auto *Property : Ext->instance_properties())
1804  if ((Property->getGetterName() == IMD->getSelector() ||
1805  Property->getSetterName() == IMD->getSelector()) &&
1806  (Property->getPropertyIvarDecl() == IV))
1807  return true;
1808  return false;
1809 }
1810 
1812  ObjCPropertyDecl *Prop) {
1813  bool SuperClassImplementsGetter = false;
1814  bool SuperClassImplementsSetter = false;
1816  SuperClassImplementsSetter = true;
1817 
1818  while (IDecl->getSuperClass()) {
1819  ObjCInterfaceDecl *SDecl = IDecl->getSuperClass();
1820  if (!SuperClassImplementsGetter && SDecl->getInstanceMethod(Prop->getGetterName()))
1821  SuperClassImplementsGetter = true;
1822 
1823  if (!SuperClassImplementsSetter && SDecl->getInstanceMethod(Prop->getSetterName()))
1824  SuperClassImplementsSetter = true;
1825  if (SuperClassImplementsGetter && SuperClassImplementsSetter)
1826  return true;
1827  IDecl = IDecl->getSuperClass();
1828  }
1829  return false;
1830 }
1831 
1832 /// Default synthesizes all properties which must be synthesized
1833 /// in class's \@implementation.
1835  ObjCInterfaceDecl *IDecl,
1836  SourceLocation AtEnd) {
1839  IDecl->collectPropertiesToImplement(PropMap, PropertyOrder);
1840  if (PropMap.empty())
1841  return;
1842  ObjCInterfaceDecl::PropertyMap SuperPropMap;
1843  CollectSuperClassPropertyImplementations(IDecl, SuperPropMap);
1844 
1845  for (unsigned i = 0, e = PropertyOrder.size(); i != e; i++) {
1846  ObjCPropertyDecl *Prop = PropertyOrder[i];
1847  // Is there a matching property synthesize/dynamic?
1848  if (Prop->isInvalidDecl() ||
1849  Prop->isClassProperty() ||
1851  continue;
1852  // Property may have been synthesized by user.
1853  if (IMPDecl->FindPropertyImplDecl(
1854  Prop->getIdentifier(), Prop->getQueryKind()))
1855  continue;
1856  if (IMPDecl->getInstanceMethod(Prop->getGetterName())) {
1858  continue;
1859  if (IMPDecl->getInstanceMethod(Prop->getSetterName()))
1860  continue;
1861  }
1862  if (ObjCPropertyImplDecl *PID =
1863  IMPDecl->FindPropertyImplIvarDecl(Prop->getIdentifier())) {
1864  Diag(Prop->getLocation(), diag::warn_no_autosynthesis_shared_ivar_property)
1865  << Prop->getIdentifier();
1866  if (PID->getLocation().isValid())
1867  Diag(PID->getLocation(), diag::note_property_synthesize);
1868  continue;
1869  }
1870  ObjCPropertyDecl *PropInSuperClass =
1871  SuperPropMap[std::make_pair(Prop->getIdentifier(),
1872  Prop->isClassProperty())];
1873  if (ObjCProtocolDecl *Proto =
1874  dyn_cast<ObjCProtocolDecl>(Prop->getDeclContext())) {
1875  // We won't auto-synthesize properties declared in protocols.
1876  // Suppress the warning if class's superclass implements property's
1877  // getter and implements property's setter (if readwrite property).
1878  // Or, if property is going to be implemented in its super class.
1879  if (!SuperClassImplementsProperty(IDecl, Prop) && !PropInSuperClass) {
1880  Diag(IMPDecl->getLocation(),
1881  diag::warn_auto_synthesizing_protocol_property)
1882  << Prop << Proto;
1883  Diag(Prop->getLocation(), diag::note_property_declare);
1884  std::string FixIt =
1885  (Twine("@synthesize ") + Prop->getName() + ";\n\n").str();
1886  Diag(AtEnd, diag::note_add_synthesize_directive)
1887  << FixItHint::CreateInsertion(AtEnd, FixIt);
1888  }
1889  continue;
1890  }
1891  // If property to be implemented in the super class, ignore.
1892  if (PropInSuperClass) {
1894  (PropInSuperClass->getPropertyAttributes() &
1896  !IMPDecl->getInstanceMethod(Prop->getSetterName()) &&
1897  !IDecl->HasUserDeclaredSetterMethod(Prop)) {
1898  Diag(Prop->getLocation(), diag::warn_no_autosynthesis_property)
1899  << Prop->getIdentifier();
1900  Diag(PropInSuperClass->getLocation(), diag::note_property_declare);
1901  }
1902  else {
1903  Diag(Prop->getLocation(), diag::warn_autosynthesis_property_in_superclass)
1904  << Prop->getIdentifier();
1905  Diag(PropInSuperClass->getLocation(), diag::note_property_declare);
1906  Diag(IMPDecl->getLocation(), diag::note_while_in_implementation);
1907  }
1908  continue;
1909  }
1910  // We use invalid SourceLocations for the synthesized ivars since they
1911  // aren't really synthesized at a particular location; they just exist.
1912  // Saying that they are located at the @implementation isn't really going
1913  // to help users.
1914  ObjCPropertyImplDecl *PIDecl = dyn_cast_or_null<ObjCPropertyImplDecl>(
1916  true,
1917  /* property = */ Prop->getIdentifier(),
1918  /* ivar = */ Prop->getDefaultSynthIvarName(Context),
1919  Prop->getLocation(), Prop->getQueryKind()));
1920  if (PIDecl && !Prop->isUnavailable()) {
1921  Diag(Prop->getLocation(), diag::warn_missing_explicit_synthesis);
1922  Diag(IMPDecl->getLocation(), diag::note_while_in_implementation);
1923  }
1924  }
1925 }
1926 
1928  SourceLocation AtEnd) {
1929  if (!LangOpts.ObjCDefaultSynthProperties || LangOpts.ObjCRuntime.isFragile())
1930  return;
1931  ObjCImplementationDecl *IC=dyn_cast_or_null<ObjCImplementationDecl>(D);
1932  if (!IC)
1933  return;
1934  if (ObjCInterfaceDecl* IDecl = IC->getClassInterface())
1935  if (!IDecl->isObjCRequiresPropertyDefs())
1936  DefaultSynthesizeProperties(S, IC, IDecl, AtEnd);
1937 }
1938 
1940  Sema &S, ObjCInterfaceDecl *PrimaryClass, Selector Method,
1941  ObjCImplDecl *IMPDecl, ObjCContainerDecl *CDecl, ObjCCategoryDecl *C,
1942  ObjCPropertyDecl *Prop,
1943  llvm::SmallPtrSet<const ObjCMethodDecl *, 8> &SMap) {
1944  // Check to see if we have a corresponding selector in SMap and with the
1945  // right method type.
1946  auto I = std::find_if(SMap.begin(), SMap.end(),
1947  [&](const ObjCMethodDecl *x) {
1948  return x->getSelector() == Method &&
1949  x->isClassMethod() == Prop->isClassProperty();
1950  });
1951  // When reporting on missing property setter/getter implementation in
1952  // categories, do not report when they are declared in primary class,
1953  // class's protocol, or one of it super classes. This is because,
1954  // the class is going to implement them.
1955  if (I == SMap.end() &&
1956  (PrimaryClass == nullptr ||
1957  !PrimaryClass->lookupPropertyAccessor(Method, C,
1958  Prop->isClassProperty()))) {
1959  unsigned diag =
1960  isa<ObjCCategoryDecl>(CDecl)
1961  ? (Prop->isClassProperty()
1962  ? diag::warn_impl_required_in_category_for_class_property
1963  : diag::warn_setter_getter_impl_required_in_category)
1964  : (Prop->isClassProperty()
1965  ? diag::warn_impl_required_for_class_property
1966  : diag::warn_setter_getter_impl_required);
1967  S.Diag(IMPDecl->getLocation(), diag) << Prop->getDeclName() << Method;
1968  S.Diag(Prop->getLocation(), diag::note_property_declare);
1969  if (S.LangOpts.ObjCDefaultSynthProperties &&
1971  if (ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(CDecl))
1972  if (const ObjCInterfaceDecl *RID = ID->isObjCRequiresPropertyDefs())
1973  S.Diag(RID->getLocation(), diag::note_suppressed_class_declare);
1974  }
1975 }
1976 
1978  ObjCContainerDecl *CDecl,
1979  bool SynthesizeProperties) {
1981  ObjCInterfaceDecl *IDecl = dyn_cast<ObjCInterfaceDecl>(CDecl);
1982 
1983  // Since we don't synthesize class properties, we should emit diagnose even
1984  // if SynthesizeProperties is true.
1985  ObjCContainerDecl::PropertyMap NoNeedToImplPropMap;
1986  // Gather properties which need not be implemented in this class
1987  // or category.
1988  if (!IDecl)
1989  if (ObjCCategoryDecl *C = dyn_cast<ObjCCategoryDecl>(CDecl)) {
1990  // For categories, no need to implement properties declared in
1991  // its primary class (and its super classes) if property is
1992  // declared in one of those containers.
1993  if ((IDecl = C->getClassInterface())) {
1995  IDecl->collectPropertiesToImplement(NoNeedToImplPropMap, PO);
1996  }
1997  }
1998  if (IDecl)
1999  CollectSuperClassPropertyImplementations(IDecl, NoNeedToImplPropMap);
2000 
2001  // When SynthesizeProperties is true, we only check class properties.
2002  CollectImmediateProperties(CDecl, PropMap, NoNeedToImplPropMap,
2003  SynthesizeProperties/*CollectClassPropsOnly*/);
2004 
2005  // Scan the @interface to see if any of the protocols it adopts
2006  // require an explicit implementation, via attribute
2007  // 'objc_protocol_requires_explicit_implementation'.
2008  if (IDecl) {
2009  std::unique_ptr<ObjCContainerDecl::PropertyMap> LazyMap;
2010 
2011  for (auto *PDecl : IDecl->all_referenced_protocols()) {
2012  if (!PDecl->hasAttr<ObjCExplicitProtocolImplAttr>())
2013  continue;
2014  // Lazily construct a set of all the properties in the @interface
2015  // of the class, without looking at the superclass. We cannot
2016  // use the call to CollectImmediateProperties() above as that
2017  // utilizes information from the super class's properties as well
2018  // as scans the adopted protocols. This work only triggers for protocols
2019  // with the attribute, which is very rare, and only occurs when
2020  // analyzing the @implementation.
2021  if (!LazyMap) {
2022  ObjCContainerDecl::PropertyMap NoNeedToImplPropMap;
2023  LazyMap.reset(new ObjCContainerDecl::PropertyMap());
2024  CollectImmediateProperties(CDecl, *LazyMap, NoNeedToImplPropMap,
2025  /* CollectClassPropsOnly */ false,
2026  /* IncludeProtocols */ false);
2027  }
2028  // Add the properties of 'PDecl' to the list of properties that
2029  // need to be implemented.
2030  for (auto *PropDecl : PDecl->properties()) {
2031  if ((*LazyMap)[std::make_pair(PropDecl->getIdentifier(),
2032  PropDecl->isClassProperty())])
2033  continue;
2034  PropMap[std::make_pair(PropDecl->getIdentifier(),
2035  PropDecl->isClassProperty())] = PropDecl;
2036  }
2037  }
2038  }
2039 
2040  if (PropMap.empty())
2041  return;
2042 
2044  for (const auto *I : IMPDecl->property_impls())
2045  PropImplMap.insert(I->getPropertyDecl());
2046 
2047  llvm::SmallPtrSet<const ObjCMethodDecl *, 8> InsMap;
2048  // Collect property accessors implemented in current implementation.
2049  for (const auto *I : IMPDecl->methods())
2050  InsMap.insert(I);
2051 
2052  ObjCCategoryDecl *C = dyn_cast<ObjCCategoryDecl>(CDecl);
2053  ObjCInterfaceDecl *PrimaryClass = nullptr;
2054  if (C && !C->IsClassExtension())
2055  if ((PrimaryClass = C->getClassInterface()))
2056  // Report unimplemented properties in the category as well.
2057  if (ObjCImplDecl *IMP = PrimaryClass->getImplementation()) {
2058  // When reporting on missing setter/getters, do not report when
2059  // setter/getter is implemented in category's primary class
2060  // implementation.
2061  for (const auto *I : IMP->methods())
2062  InsMap.insert(I);
2063  }
2064 
2065  for (ObjCContainerDecl::PropertyMap::iterator
2066  P = PropMap.begin(), E = PropMap.end(); P != E; ++P) {
2067  ObjCPropertyDecl *Prop = P->second;
2068  // Is there a matching property synthesize/dynamic?
2069  if (Prop->isInvalidDecl() ||
2071  PropImplMap.count(Prop) ||
2072  Prop->getAvailability() == AR_Unavailable)
2073  continue;
2074 
2075  // Diagnose unimplemented getters and setters.
2077  PrimaryClass, Prop->getGetterName(), IMPDecl, CDecl, C, Prop, InsMap);
2078  if (!Prop->isReadOnly())
2080  PrimaryClass, Prop->getSetterName(),
2081  IMPDecl, CDecl, C, Prop, InsMap);
2082  }
2083 }
2084 
2086  for (const auto *propertyImpl : impDecl->property_impls()) {
2087  const auto *property = propertyImpl->getPropertyDecl();
2088 
2089  // Warn about null_resettable properties with synthesized setters,
2090  // because the setter won't properly handle nil.
2091  if (propertyImpl->getPropertyImplementation()
2093  (property->getPropertyAttributes() &
2095  property->getGetterMethodDecl() &&
2096  property->getSetterMethodDecl()) {
2097  auto *getterMethod = property->getGetterMethodDecl();
2098  auto *setterMethod = property->getSetterMethodDecl();
2099  if (!impDecl->getInstanceMethod(setterMethod->getSelector()) &&
2100  !impDecl->getInstanceMethod(getterMethod->getSelector())) {
2101  SourceLocation loc = propertyImpl->getLocation();
2102  if (loc.isInvalid())
2103  loc = impDecl->getLocStart();
2104 
2105  Diag(loc, diag::warn_null_resettable_setter)
2106  << setterMethod->getSelector() << property->getDeclName();
2107  }
2108  }
2109  }
2110 }
2111 
2112 void
2114  ObjCInterfaceDecl* IDecl) {
2115  // Rules apply in non-GC mode only
2116  if (getLangOpts().getGC() != LangOptions::NonGC)
2117  return;
2119  for (auto *Prop : IDecl->properties())
2120  PM[std::make_pair(Prop->getIdentifier(), Prop->isClassProperty())] = Prop;
2121  for (const auto *Ext : IDecl->known_extensions())
2122  for (auto *Prop : Ext->properties())
2123  PM[std::make_pair(Prop->getIdentifier(), Prop->isClassProperty())] = Prop;
2124 
2125  for (ObjCContainerDecl::PropertyMap::iterator I = PM.begin(), E = PM.end();
2126  I != E; ++I) {
2127  const ObjCPropertyDecl *Property = I->second;
2128  ObjCMethodDecl *GetterMethod = nullptr;
2129  ObjCMethodDecl *SetterMethod = nullptr;
2130  bool LookedUpGetterSetter = false;
2131 
2132  unsigned Attributes = Property->getPropertyAttributes();
2133  unsigned AttributesAsWritten = Property->getPropertyAttributesAsWritten();
2134 
2135  if (!(AttributesAsWritten & ObjCPropertyDecl::OBJC_PR_atomic) &&
2136  !(AttributesAsWritten & ObjCPropertyDecl::OBJC_PR_nonatomic)) {
2137  GetterMethod = Property->isClassProperty() ?
2138  IMPDecl->getClassMethod(Property->getGetterName()) :
2139  IMPDecl->getInstanceMethod(Property->getGetterName());
2140  SetterMethod = Property->isClassProperty() ?
2141  IMPDecl->getClassMethod(Property->getSetterName()) :
2142  IMPDecl->getInstanceMethod(Property->getSetterName());
2143  LookedUpGetterSetter = true;
2144  if (GetterMethod) {
2145  Diag(GetterMethod->getLocation(),
2146  diag::warn_default_atomic_custom_getter_setter)
2147  << Property->getIdentifier() << 0;
2148  Diag(Property->getLocation(), diag::note_property_declare);
2149  }
2150  if (SetterMethod) {
2151  Diag(SetterMethod->getLocation(),
2152  diag::warn_default_atomic_custom_getter_setter)
2153  << Property->getIdentifier() << 1;
2154  Diag(Property->getLocation(), diag::note_property_declare);
2155  }
2156  }
2157 
2158  // We only care about readwrite atomic property.
2159  if ((Attributes & ObjCPropertyDecl::OBJC_PR_nonatomic) ||
2160  !(Attributes & ObjCPropertyDecl::OBJC_PR_readwrite))
2161  continue;
2162  if (const ObjCPropertyImplDecl *PIDecl = IMPDecl->FindPropertyImplDecl(
2163  Property->getIdentifier(), Property->getQueryKind())) {
2164  if (PIDecl->getPropertyImplementation() == ObjCPropertyImplDecl::Dynamic)
2165  continue;
2166  if (!LookedUpGetterSetter) {
2167  GetterMethod = Property->isClassProperty() ?
2168  IMPDecl->getClassMethod(Property->getGetterName()) :
2169  IMPDecl->getInstanceMethod(Property->getGetterName());
2170  SetterMethod = Property->isClassProperty() ?
2171  IMPDecl->getClassMethod(Property->getSetterName()) :
2172  IMPDecl->getInstanceMethod(Property->getSetterName());
2173  }
2174  if ((GetterMethod && !SetterMethod) || (!GetterMethod && SetterMethod)) {
2175  SourceLocation MethodLoc =
2176  (GetterMethod ? GetterMethod->getLocation()
2177  : SetterMethod->getLocation());
2178  Diag(MethodLoc, diag::warn_atomic_property_rule)
2179  << Property->getIdentifier() << (GetterMethod != nullptr)
2180  << (SetterMethod != nullptr);
2181  // fixit stuff.
2182  if (Property->getLParenLoc().isValid() &&
2183  !(AttributesAsWritten & ObjCPropertyDecl::OBJC_PR_atomic)) {
2184  // @property () ... case.
2185  SourceLocation AfterLParen =
2186  getLocForEndOfToken(Property->getLParenLoc());
2187  StringRef NonatomicStr = AttributesAsWritten? "nonatomic, "
2188  : "nonatomic";
2189  Diag(Property->getLocation(),
2190  diag::note_atomic_property_fixup_suggest)
2191  << FixItHint::CreateInsertion(AfterLParen, NonatomicStr);
2192  } else if (Property->getLParenLoc().isInvalid()) {
2193  //@property id etc.
2194  SourceLocation startLoc =
2195  Property->getTypeSourceInfo()->getTypeLoc().getBeginLoc();
2196  Diag(Property->getLocation(),
2197  diag::note_atomic_property_fixup_suggest)
2198  << FixItHint::CreateInsertion(startLoc, "(nonatomic) ");
2199  }
2200  else
2201  Diag(MethodLoc, diag::note_atomic_property_fixup_suggest);
2202  Diag(Property->getLocation(), diag::note_property_declare);
2203  }
2204  }
2205  }
2206 }
2207 
2209  if (getLangOpts().getGC() == LangOptions::GCOnly)
2210  return;
2211 
2212  for (const auto *PID : D->property_impls()) {
2213  const ObjCPropertyDecl *PD = PID->getPropertyDecl();
2214  if (PD && !PD->hasAttr<NSReturnsNotRetainedAttr>() &&
2215  !PD->isClassProperty() &&
2216  !D->getInstanceMethod(PD->getGetterName())) {
2217  ObjCMethodDecl *method = PD->getGetterMethodDecl();
2218  if (!method)
2219  continue;
2220  ObjCMethodFamily family = method->getMethodFamily();
2221  if (family == OMF_alloc || family == OMF_copy ||
2222  family == OMF_mutableCopy || family == OMF_new) {
2223  if (getLangOpts().ObjCAutoRefCount)
2224  Diag(PD->getLocation(), diag::err_cocoa_naming_owned_rule);
2225  else
2226  Diag(PD->getLocation(), diag::warn_cocoa_naming_owned_rule);
2227 
2228  // Look for a getter explicitly declared alongside the property.
2229  // If we find one, use its location for the note.
2230  SourceLocation noteLoc = PD->getLocation();
2231  SourceLocation fixItLoc;
2232  for (auto *getterRedecl : method->redecls()) {
2233  if (getterRedecl->isImplicit())
2234  continue;
2235  if (getterRedecl->getDeclContext() != PD->getDeclContext())
2236  continue;
2237  noteLoc = getterRedecl->getLocation();
2238  fixItLoc = getterRedecl->getLocEnd();
2239  }
2240 
2242  TokenValue tokens[] = {
2243  tok::kw___attribute, tok::l_paren, tok::l_paren,
2244  PP.getIdentifierInfo("objc_method_family"), tok::l_paren,
2245  PP.getIdentifierInfo("none"), tok::r_paren,
2246  tok::r_paren, tok::r_paren
2247  };
2248  StringRef spelling = "__attribute__((objc_method_family(none)))";
2249  StringRef macroName = PP.getLastMacroWithSpelling(noteLoc, tokens);
2250  if (!macroName.empty())
2251  spelling = macroName;
2252 
2253  auto noteDiag = Diag(noteLoc, diag::note_cocoa_naming_declare_family)
2254  << method->getDeclName() << spelling;
2255  if (fixItLoc.isValid()) {
2256  SmallString<64> fixItText(" ");
2257  fixItText += spelling;
2258  noteDiag << FixItHint::CreateInsertion(fixItLoc, fixItText);
2259  }
2260  }
2261  }
2262  }
2263 }
2264 
2266  const ObjCImplementationDecl *ImplD,
2267  const ObjCInterfaceDecl *IFD) {
2268  assert(IFD->hasDesignatedInitializers());
2269  const ObjCInterfaceDecl *SuperD = IFD->getSuperClass();
2270  if (!SuperD)
2271  return;
2272 
2273  SelectorSet InitSelSet;
2274  for (const auto *I : ImplD->instance_methods())
2275  if (I->getMethodFamily() == OMF_init)
2276  InitSelSet.insert(I->getSelector());
2277 
2279  SuperD->getDesignatedInitializers(DesignatedInits);
2281  I = DesignatedInits.begin(), E = DesignatedInits.end(); I != E; ++I) {
2282  const ObjCMethodDecl *MD = *I;
2283  if (!InitSelSet.count(MD->getSelector())) {
2284  bool Ignore = false;
2285  if (auto *IMD = IFD->getInstanceMethod(MD->getSelector())) {
2286  Ignore = IMD->isUnavailable();
2287  }
2288  if (!Ignore) {
2289  Diag(ImplD->getLocation(),
2290  diag::warn_objc_implementation_missing_designated_init_override)
2291  << MD->getSelector();
2292  Diag(MD->getLocation(), diag::note_objc_designated_init_marked_here);
2293  }
2294  }
2295  }
2296 }
2297 
2298 /// AddPropertyAttrs - Propagates attributes from a property to the
2299 /// implicitly-declared getter or setter for that property.
2300 static void AddPropertyAttrs(Sema &S, ObjCMethodDecl *PropertyMethod,
2302  // Should we just clone all attributes over?
2303  for (const auto *A : Property->attrs()) {
2304  if (isa<DeprecatedAttr>(A) ||
2305  isa<UnavailableAttr>(A) ||
2306  isa<AvailabilityAttr>(A))
2307  PropertyMethod->addAttr(A->clone(S.Context));
2308  }
2309 }
2310 
2311 /// ProcessPropertyDecl - Make sure that any user-defined setter/getter methods
2312 /// have the property type and issue diagnostics if they don't.
2313 /// Also synthesize a getter/setter method if none exist (and update the
2314 /// appropriate lookup tables.
2316  ObjCMethodDecl *GetterMethod, *SetterMethod;
2317  ObjCContainerDecl *CD = cast<ObjCContainerDecl>(property->getDeclContext());
2318  if (CD->isInvalidDecl())
2319  return;
2320 
2321  bool IsClassProperty = property->isClassProperty();
2322  GetterMethod = IsClassProperty ?
2323  CD->getClassMethod(property->getGetterName()) :
2324  CD->getInstanceMethod(property->getGetterName());
2325 
2326  // if setter or getter is not found in class extension, it might be
2327  // in the primary class.
2328  if (!GetterMethod)
2329  if (const ObjCCategoryDecl *CatDecl = dyn_cast<ObjCCategoryDecl>(CD))
2330  if (CatDecl->IsClassExtension())
2331  GetterMethod = IsClassProperty ? CatDecl->getClassInterface()->
2332  getClassMethod(property->getGetterName()) :
2333  CatDecl->getClassInterface()->
2334  getInstanceMethod(property->getGetterName());
2335 
2336  SetterMethod = IsClassProperty ?
2337  CD->getClassMethod(property->getSetterName()) :
2338  CD->getInstanceMethod(property->getSetterName());
2339  if (!SetterMethod)
2340  if (const ObjCCategoryDecl *CatDecl = dyn_cast<ObjCCategoryDecl>(CD))
2341  if (CatDecl->IsClassExtension())
2342  SetterMethod = IsClassProperty ? CatDecl->getClassInterface()->
2343  getClassMethod(property->getSetterName()) :
2344  CatDecl->getClassInterface()->
2345  getInstanceMethod(property->getSetterName());
2346  DiagnosePropertyAccessorMismatch(property, GetterMethod,
2347  property->getLocation());
2348 
2349  if (!property->isReadOnly() && SetterMethod) {
2350  if (Context.getCanonicalType(SetterMethod->getReturnType()) !=
2351  Context.VoidTy)
2352  Diag(SetterMethod->getLocation(), diag::err_setter_type_void);
2353  if (SetterMethod->param_size() != 1 ||
2355  (*SetterMethod->param_begin())->getType().getNonReferenceType(),
2356  property->getType().getNonReferenceType())) {
2357  Diag(property->getLocation(),
2358  diag::warn_accessor_property_type_mismatch)
2359  << property->getDeclName()
2360  << SetterMethod->getSelector();
2361  Diag(SetterMethod->getLocation(), diag::note_declared_at);
2362  }
2363  }
2364 
2365  // Synthesize getter/setter methods if none exist.
2366  // Find the default getter and if one not found, add one.
2367  // FIXME: The synthesized property we set here is misleading. We almost always
2368  // synthesize these methods unless the user explicitly provided prototypes
2369  // (which is odd, but allowed). Sema should be typechecking that the
2370  // declarations jive in that situation (which it is not currently).
2371  if (!GetterMethod) {
2372  // No instance/class method of same name as property getter name was found.
2373  // Declare a getter method and add it to the list of methods
2374  // for this class.
2375  SourceLocation Loc = property->getLocation();
2376 
2377  // The getter returns the declared property type with all qualifiers
2378  // removed.
2379  QualType resultTy = property->getType().getAtomicUnqualifiedType();
2380 
2381  // If the property is null_resettable, the getter returns nonnull.
2382  if (property->getPropertyAttributes() &
2384  QualType modifiedTy = resultTy;
2385  if (auto nullability = AttributedType::stripOuterNullability(modifiedTy)) {
2386  if (*nullability == NullabilityKind::Unspecified)
2388  modifiedTy, modifiedTy);
2389  }
2390  }
2391 
2392  GetterMethod = ObjCMethodDecl::Create(Context, Loc, Loc,
2393  property->getGetterName(),
2394  resultTy, nullptr, CD,
2395  !IsClassProperty, /*isVariadic=*/false,
2396  /*isPropertyAccessor=*/true,
2397  /*isImplicitlyDeclared=*/true, /*isDefined=*/false,
2398  (property->getPropertyImplementation() ==
2402  CD->addDecl(GetterMethod);
2403 
2404  AddPropertyAttrs(*this, GetterMethod, property);
2405 
2406  if (property->hasAttr<NSReturnsNotRetainedAttr>())
2407  GetterMethod->addAttr(NSReturnsNotRetainedAttr::CreateImplicit(Context,
2408  Loc));
2409 
2410  if (property->hasAttr<ObjCReturnsInnerPointerAttr>())
2411  GetterMethod->addAttr(
2412  ObjCReturnsInnerPointerAttr::CreateImplicit(Context, Loc));
2413 
2414  if (const SectionAttr *SA = property->getAttr<SectionAttr>())
2415  GetterMethod->addAttr(
2416  SectionAttr::CreateImplicit(Context, SectionAttr::GNU_section,
2417  SA->getName(), Loc));
2418 
2419  if (getLangOpts().ObjCAutoRefCount)
2420  CheckARCMethodDecl(GetterMethod);
2421  } else
2422  // A user declared getter will be synthesize when @synthesize of
2423  // the property with the same name is seen in the @implementation
2424  GetterMethod->setPropertyAccessor(true);
2425  property->setGetterMethodDecl(GetterMethod);
2426 
2427  // Skip setter if property is read-only.
2428  if (!property->isReadOnly()) {
2429  // Find the default setter and if one not found, add one.
2430  if (!SetterMethod) {
2431  // No instance/class method of same name as property setter name was
2432  // found.
2433  // Declare a setter method and add it to the list of methods
2434  // for this class.
2435  SourceLocation Loc = property->getLocation();
2436 
2437  SetterMethod =
2438  ObjCMethodDecl::Create(Context, Loc, Loc,
2439  property->getSetterName(), Context.VoidTy,
2440  nullptr, CD, !IsClassProperty,
2441  /*isVariadic=*/false,
2442  /*isPropertyAccessor=*/true,
2443  /*isImplicitlyDeclared=*/true,
2444  /*isDefined=*/false,
2445  (property->getPropertyImplementation() ==
2449 
2450  // Remove all qualifiers from the setter's parameter type.
2451  QualType paramTy =
2452  property->getType().getUnqualifiedType().getAtomicUnqualifiedType();
2453 
2454  // If the property is null_resettable, the setter accepts a
2455  // nullable value.
2456  if (property->getPropertyAttributes() &
2458  QualType modifiedTy = paramTy;
2459  if (auto nullability = AttributedType::stripOuterNullability(modifiedTy)){
2460  if (*nullability == NullabilityKind::Unspecified)
2462  modifiedTy, modifiedTy);
2463  }
2464  }
2465 
2466  // Invent the arguments for the setter. We don't bother making a
2467  // nice name for the argument.
2468  ParmVarDecl *Argument = ParmVarDecl::Create(Context, SetterMethod,
2469  Loc, Loc,
2470  property->getIdentifier(),
2471  paramTy,
2472  /*TInfo=*/nullptr,
2473  SC_None,
2474  nullptr);
2475  SetterMethod->setMethodParams(Context, Argument, None);
2476 
2477  AddPropertyAttrs(*this, SetterMethod, property);
2478 
2479  CD->addDecl(SetterMethod);
2480  if (const SectionAttr *SA = property->getAttr<SectionAttr>())
2481  SetterMethod->addAttr(
2482  SectionAttr::CreateImplicit(Context, SectionAttr::GNU_section,
2483  SA->getName(), Loc));
2484  // It's possible for the user to have set a very odd custom
2485  // setter selector that causes it to have a method family.
2486  if (getLangOpts().ObjCAutoRefCount)
2487  CheckARCMethodDecl(SetterMethod);
2488  } else
2489  // A user declared setter will be synthesize when @synthesize of
2490  // the property with the same name is seen in the @implementation
2491  SetterMethod->setPropertyAccessor(true);
2492  property->setSetterMethodDecl(SetterMethod);
2493  }
2494  // Add any synthesized methods to the global pool. This allows us to
2495  // handle the following, which is supported by GCC (and part of the design).
2496  //
2497  // @interface Foo
2498  // @property double bar;
2499  // @end
2500  //
2501  // void thisIsUnfortunate() {
2502  // id foo;
2503  // double bar = [foo bar];
2504  // }
2505  //
2506  if (!IsClassProperty) {
2507  if (GetterMethod)
2508  AddInstanceMethodToGlobalPool(GetterMethod);
2509  if (SetterMethod)
2510  AddInstanceMethodToGlobalPool(SetterMethod);
2511  } else {
2512  if (GetterMethod)
2513  AddFactoryMethodToGlobalPool(GetterMethod);
2514  if (SetterMethod)
2515  AddFactoryMethodToGlobalPool(SetterMethod);
2516  }
2517 
2518  ObjCInterfaceDecl *CurrentClass = dyn_cast<ObjCInterfaceDecl>(CD);
2519  if (!CurrentClass) {
2520  if (ObjCCategoryDecl *Cat = dyn_cast<ObjCCategoryDecl>(CD))
2521  CurrentClass = Cat->getClassInterface();
2522  else if (ObjCImplDecl *Impl = dyn_cast<ObjCImplDecl>(CD))
2523  CurrentClass = Impl->getClassInterface();
2524  }
2525  if (GetterMethod)
2526  CheckObjCMethodOverrides(GetterMethod, CurrentClass, Sema::RTC_Unknown);
2527  if (SetterMethod)
2528  CheckObjCMethodOverrides(SetterMethod, CurrentClass, Sema::RTC_Unknown);
2529 }
2530 
2532  SourceLocation Loc,
2533  unsigned &Attributes,
2534  bool propertyInPrimaryClass) {
2535  // FIXME: Improve the reported location.
2536  if (!PDecl || PDecl->isInvalidDecl())
2537  return;
2538 
2539  if ((Attributes & ObjCDeclSpec::DQ_PR_readonly) &&
2540  (Attributes & ObjCDeclSpec::DQ_PR_readwrite))
2541  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2542  << "readonly" << "readwrite";
2543 
2544  ObjCPropertyDecl *PropertyDecl = cast<ObjCPropertyDecl>(PDecl);
2545  QualType PropertyTy = PropertyDecl->getType();
2546 
2547  // Check for copy or retain on non-object types.
2548  if ((Attributes & (ObjCDeclSpec::DQ_PR_weak | ObjCDeclSpec::DQ_PR_copy |
2550  !PropertyTy->isObjCRetainableType() &&
2551  !PropertyDecl->hasAttr<ObjCNSObjectAttr>()) {
2552  Diag(Loc, diag::err_objc_property_requires_object)
2553  << (Attributes & ObjCDeclSpec::DQ_PR_weak ? "weak" :
2554  Attributes & ObjCDeclSpec::DQ_PR_copy ? "copy" : "retain (or strong)");
2557  PropertyDecl->setInvalidDecl();
2558  }
2559 
2560  // Check for more than one of { assign, copy, retain }.
2561  if (Attributes & ObjCDeclSpec::DQ_PR_assign) {
2562  if (Attributes & ObjCDeclSpec::DQ_PR_copy) {
2563  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2564  << "assign" << "copy";
2565  Attributes &= ~ObjCDeclSpec::DQ_PR_copy;
2566  }
2567  if (Attributes & ObjCDeclSpec::DQ_PR_retain) {
2568  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2569  << "assign" << "retain";
2570  Attributes &= ~ObjCDeclSpec::DQ_PR_retain;
2571  }
2572  if (Attributes & ObjCDeclSpec::DQ_PR_strong) {
2573  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2574  << "assign" << "strong";
2575  Attributes &= ~ObjCDeclSpec::DQ_PR_strong;
2576  }
2577  if (getLangOpts().ObjCAutoRefCount &&
2578  (Attributes & ObjCDeclSpec::DQ_PR_weak)) {
2579  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2580  << "assign" << "weak";
2581  Attributes &= ~ObjCDeclSpec::DQ_PR_weak;
2582  }
2583  if (PropertyDecl->hasAttr<IBOutletCollectionAttr>())
2584  Diag(Loc, diag::warn_iboutletcollection_property_assign);
2585  } else if (Attributes & ObjCDeclSpec::DQ_PR_unsafe_unretained) {
2586  if (Attributes & ObjCDeclSpec::DQ_PR_copy) {
2587  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2588  << "unsafe_unretained" << "copy";
2589  Attributes &= ~ObjCDeclSpec::DQ_PR_copy;
2590  }
2591  if (Attributes & ObjCDeclSpec::DQ_PR_retain) {
2592  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2593  << "unsafe_unretained" << "retain";
2594  Attributes &= ~ObjCDeclSpec::DQ_PR_retain;
2595  }
2596  if (Attributes & ObjCDeclSpec::DQ_PR_strong) {
2597  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2598  << "unsafe_unretained" << "strong";
2599  Attributes &= ~ObjCDeclSpec::DQ_PR_strong;
2600  }
2601  if (getLangOpts().ObjCAutoRefCount &&
2602  (Attributes & ObjCDeclSpec::DQ_PR_weak)) {
2603  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2604  << "unsafe_unretained" << "weak";
2605  Attributes &= ~ObjCDeclSpec::DQ_PR_weak;
2606  }
2607  } else if (Attributes & ObjCDeclSpec::DQ_PR_copy) {
2608  if (Attributes & ObjCDeclSpec::DQ_PR_retain) {
2609  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2610  << "copy" << "retain";
2611  Attributes &= ~ObjCDeclSpec::DQ_PR_retain;
2612  }
2613  if (Attributes & ObjCDeclSpec::DQ_PR_strong) {
2614  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2615  << "copy" << "strong";
2616  Attributes &= ~ObjCDeclSpec::DQ_PR_strong;
2617  }
2618  if (Attributes & ObjCDeclSpec::DQ_PR_weak) {
2619  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2620  << "copy" << "weak";
2621  Attributes &= ~ObjCDeclSpec::DQ_PR_weak;
2622  }
2623  }
2624  else if ((Attributes & ObjCDeclSpec::DQ_PR_retain) &&
2625  (Attributes & ObjCDeclSpec::DQ_PR_weak)) {
2626  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2627  << "retain" << "weak";
2628  Attributes &= ~ObjCDeclSpec::DQ_PR_retain;
2629  }
2630  else if ((Attributes & ObjCDeclSpec::DQ_PR_strong) &&
2631  (Attributes & ObjCDeclSpec::DQ_PR_weak)) {
2632  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2633  << "strong" << "weak";
2634  Attributes &= ~ObjCDeclSpec::DQ_PR_weak;
2635  }
2636 
2637  if (Attributes & ObjCDeclSpec::DQ_PR_weak) {
2638  // 'weak' and 'nonnull' are mutually exclusive.
2639  if (auto nullability = PropertyTy->getNullability(Context)) {
2640  if (*nullability == NullabilityKind::NonNull)
2641  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2642  << "nonnull" << "weak";
2643  }
2644  }
2645 
2646  if ((Attributes & ObjCDeclSpec::DQ_PR_atomic) &&
2647  (Attributes & ObjCDeclSpec::DQ_PR_nonatomic)) {
2648  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2649  << "atomic" << "nonatomic";
2650  Attributes &= ~ObjCDeclSpec::DQ_PR_atomic;
2651  }
2652 
2653  // Warn if user supplied no assignment attribute, property is
2654  // readwrite, and this is an object type.
2655  if (!getOwnershipRule(Attributes) && PropertyTy->isObjCRetainableType()) {
2656  if (Attributes & ObjCDeclSpec::DQ_PR_readonly) {
2657  // do nothing
2658  } else if (getLangOpts().ObjCAutoRefCount) {
2659  // With arc, @property definitions should default to strong when
2660  // not specified.
2662  } else if (PropertyTy->isObjCObjectPointerType()) {
2663  bool isAnyClassTy =
2664  (PropertyTy->isObjCClassType() ||
2665  PropertyTy->isObjCQualifiedClassType());
2666  // In non-gc, non-arc mode, 'Class' is treated as a 'void *' no need to
2667  // issue any warning.
2668  if (isAnyClassTy && getLangOpts().getGC() == LangOptions::NonGC)
2669  ;
2670  else if (propertyInPrimaryClass) {
2671  // Don't issue warning on property with no life time in class
2672  // extension as it is inherited from property in primary class.
2673  // Skip this warning in gc-only mode.
2674  if (getLangOpts().getGC() != LangOptions::GCOnly)
2675  Diag(Loc, diag::warn_objc_property_no_assignment_attribute);
2676 
2677  // If non-gc code warn that this is likely inappropriate.
2678  if (getLangOpts().getGC() == LangOptions::NonGC)
2679  Diag(Loc, diag::warn_objc_property_default_assign_on_object);
2680  }
2681  }
2682 
2683  // FIXME: Implement warning dependent on NSCopying being
2684  // implemented. See also:
2685  // <rdar://5168496&4855821&5607453&5096644&4947311&5698469&4947014&5168496>
2686  // (please trim this list while you are at it).
2687  }
2688 
2689  if (!(Attributes & ObjCDeclSpec::DQ_PR_copy)
2690  &&!(Attributes & ObjCDeclSpec::DQ_PR_readonly)
2691  && getLangOpts().getGC() == LangOptions::GCOnly
2692  && PropertyTy->isBlockPointerType())
2693  Diag(Loc, diag::warn_objc_property_copy_missing_on_block);
2694  else if ((Attributes & ObjCDeclSpec::DQ_PR_retain) &&
2695  !(Attributes & ObjCDeclSpec::DQ_PR_readonly) &&
2696  !(Attributes & ObjCDeclSpec::DQ_PR_strong) &&
2697  PropertyTy->isBlockPointerType())
2698  Diag(Loc, diag::warn_objc_property_retain_of_block);
2699 
2700  if ((Attributes & ObjCDeclSpec::DQ_PR_readonly) &&
2701  (Attributes & ObjCDeclSpec::DQ_PR_setter))
2702  Diag(Loc, diag::warn_objc_readonly_property_has_setter);
2703 }
A call to an overloaded operator written using operator syntax.
Definition: ExprCXX.h:78
SourceLocation getLocForStartOfFile(FileID FID) const
Return the source location corresponding to the first byte of the specified file. ...
ObjCPropertyQueryKind getQueryKind() const
Definition: DeclObjC.h:898
const internal::VariadicDynCastAllOfMatcher< Stmt, CallExpr > callExpr
Matches call expressions.
bool RequireNonAbstractType(SourceLocation Loc, QualType T, TypeDiagnoser &Diagnoser)
Represents a function declaration or definition.
Definition: Decl.h:1714
Lexer - This provides a simple interface that turns a text buffer into a stream of tokens...
Definition: Lexer.h:77
SourceLocation getLocWithOffset(int Offset) const
Return a source location with the specified offset from this SourceLocation.
protocol_range protocols() const
Definition: DeclObjC.h:1385
Smart pointer class that efficiently represents Objective-C method names.
A (possibly-)qualified type.
Definition: Type.h:655
ObjCInterfaceDecl * getClassInterface()
Definition: DeclObjC.h:2344
all_protocol_range all_referenced_protocols() const
Definition: DeclObjC.h:1443
ObjCInterfaceDecl * getClassInterface()
Definition: DeclObjC.cpp:1098
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.
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:1946
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:12138
void setObjCLifetime(ObjCLifetime type)
Definition: Type.h:346
static void CollectSuperClassPropertyImplementations(ObjCInterfaceDecl *CDecl, ObjCInterfaceDecl::PropertyMap &PropMap)
CollectSuperClassPropertyImplementations - This routine collects list of properties to be implemented...
bool isRecordType() const
Definition: Type.h:6179
llvm::SmallVector< ObjCPropertyDecl *, 8 > PropertyDeclOrder
Definition: DeclObjC.h:1125
QualType getQualifiedType(SplitQualType split) const
Un-split a SplitQualType.
Definition: ASTContext.h:1912
SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID)
Emit a diagnostic.
Definition: Sema.h:1281
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:86
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:775
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:6055
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:2173
void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false)
AddFactoryMethodToGlobalPool - Same as above, but for factory methods.
Definition: Sema.h:3611
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.
SourceLocation getLocForEndOfToken(SourceLocation Loc, unsigned Offset=0)
Calls Lexer::getLocForEndOfToken()
Definition: Sema.cpp:46
void setPropertyImplementation(PropertyControl pc)
Definition: DeclObjC.h:946
A container of type source information.
Definition: Decl.h:86
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:460
static bool areIncompatiblePropertyAttributes(unsigned Attr1, unsigned Attr2, unsigned Kinds)
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:740
const T * getAs() const
Member-template getAs<specific type>&#39;.
Definition: Type.h:6519
static unsigned getOwnershipRule(unsigned attr)
ObjCMethodDecl - Represents an instance or class method declaration.
Definition: DeclObjC.h:139
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:1657
bool isInvalidDecl() const
Definition: DeclBase.h:547
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:170
protocol_range protocols() const
Definition: DeclObjC.h:2148
Represents a parameter to a function.
Definition: Decl.h:1533
Defines the clang::Expr interface and subclasses for C++ expressions.
Parse and apply any fixits to the source.
The collection of all-type qualifiers we support.
Definition: Type.h:154
IdentifierInfo * getIdentifier() const
Get the identifier that names this declaration, if there is one.
Definition: Decl.h:269
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
Get the actual, stored name of the declaration, which may be a special name.
Definition: Decl.h:297
instprop_range instance_properties() const
Definition: DeclObjC.h:1021
One of these records is kept for each identifier that is lexed.
SourceLocation getSetterNameLoc() const
Definition: DeclSpec.h:869
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:150
The results of name lookup within a DeclContext.
Definition: DeclBase.h:1188
ObjCMethodDecl * getClassMethod(Selector Sel, bool AllowHidden=false) const
Definition: DeclObjC.h:1110
ObjCMethodFamily
A family of Objective-C methods.
instmeth_range instance_methods() const
Definition: DeclObjC.h:1072
method_range methods() const
Definition: DeclObjC.h:1055
Token - This structure provides full information about a lexed token.
Definition: Token.h:35
prop_range properties() const
Definition: DeclObjC.h:1006
int Category
Definition: Format.cpp:1607
IdentifierTable & Idents
Definition: ASTContext.h:539
This little struct is used to capture information about structure field declarators, which is basically just a bitfield size.
Definition: DeclSpec.h:2474
An r-value expression (a pr-value in the C++11 taxonomy) produces a temporary value.
Definition: Specifiers.h:110
bool isClassProperty() const
Definition: DeclObjC.h:896
ObjCMethodFamily getMethodFamily() const
Determines the family of this method.
Definition: DeclObjC.cpp:940
void collectPropertiesToImplement(PropertyMap &PM, PropertyDeclOrder &PO) const override
This routine collects list of properties to be implemented in the class.
Definition: DeclObjC.cpp:386
void setObjCWeakProperty(bool Val=true)
Definition: DeclSpec.h:2423
bool isNonFragile() const
Does this runtime follow the set of implied behaviors for a "non-fragile" ABI?
Definition: ObjCRuntime.h:82
ObjCContainerDecl - Represents a container for method declarations.
Definition: DeclObjC.h:986
const FormatToken & Tok
static ObjCPropertyImplDecl * Create(ASTContext &C, DeclContext *DC, SourceLocation atLoc, SourceLocation L, ObjCPropertyDecl *property, Kind PK, ObjCIvarDecl *ivarDecl, SourceLocation ivarLoc)
Definition: DeclObjC.cpp:2201
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:7594
Whether values of this type can be null is (explicitly) unspecified.
PropertyAttributeKind getPropertyAttributes() const
Definition: DeclObjC.h:857
const ObjCInterfaceDecl * isObjCRequiresPropertyDefs() const
isObjCRequiresPropertyDefs - Checks that a class or one of its super classes must not be auto-synthes...
Definition: DeclObjC.cpp:416
void MarkDeclRefReferenced(DeclRefExpr *E, const Expr *Base=nullptr)
Perform reference-marking and odr-use handling for a DeclRefExpr.
Definition: SemaExpr.cpp:15408
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:880
Values of this type can never be null.
ObjCProtocolDecl * getDefinition()
Retrieve the definition of this protocol, if any.
Definition: DeclObjC.h:2229
Scope - A scope is a transient data structure that is used while parsing the program.
Definition: Scope.h:40
bool declaresSameEntity(const Decl *D1, const Decl *D2)
Determine whether two declarations declare the same entity.
Definition: DeclBase.h:1159
Represents an Objective-C protocol declaration.
Definition: DeclObjC.h:2083
Preprocessor & PP
Definition: Sema.h:318
const LangOptions & getLangOpts() const
Definition: Sema.h:1204
PropertyControl getPropertyImplementation() const
Definition: DeclObjC.h:950
Represents an ObjC class declaration.
Definition: DeclObjC.h:1191
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:361
IdentifierInfo * getIdentifier() const
Definition: DeclSpec.h:2111
const LangOptions & LangOpts
Definition: Sema.h:317
This object can be modified without requiring retains or releases.
Definition: Type.h:175
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:2872
void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false)
AddInstanceMethodToGlobalPool - All instance methods in a translation unit are added to a global pool...
Definition: Sema.h:3606
lookup_result lookup(DeclarationName Name) const
lookup - Find the declarations (if any) with the given Name in this context.
Definition: DeclBase.cpp:1545
void CheckObjCMethodOverrides(ObjCMethodDecl *ObjCMethod, ObjCInterfaceDecl *CurrentClass, ResultTypeCompatibilityKind RTC)
ObjCPropertyImplDecl - Represents implementation declaration of a property in a class or category imp...
Definition: DeclObjC.h:2778
bool hasAttr() const
Definition: DeclBase.h:536
Sema - This implements semantic analysis and AST building for C.
Definition: Sema.h:277
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:97
AvailabilityResult getAvailability(std::string *Message=nullptr, VersionTuple EnclosingVersion=VersionTuple(), StringRef *RealizedPlatform=nullptr) const
Determine the availability of the given declaration.
Definition: DeclBase.cpp:589
llvm::SmallPtrSet< Selector, 8 > SelectorSet
Definition: Sema.h:3424
static ImplicitCastExpr * Create(const ASTContext &Context, QualType T, CastKind Kind, Expr *Operand, const CXXCastPath *BasePath, ExprValueKind Cat)
Definition: Expr.cpp:1766
void addObjCLifetime(ObjCLifetime type)
Definition: Type.h:350
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:1768
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.
SourceLocation getBeginLoc() const
Get the begin source location.
Definition: TypeLoc.cpp:190
bool isObjCGCStrong() const
true when Type is objc&#39;s strong.
Definition: Type.h:1074
Expr - This represents one expression.
Definition: Expr.h:106
known_extensions_range known_extensions() const
Definition: DeclObjC.h:1780
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:772
Selector getSetterName() const
Definition: DeclObjC.h:931
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:117
IdentifierInfo * getDefaultSynthIvarName(ASTContext &Ctx) const
Get the default name of the synthesized ivar.
Definition: DeclObjC.cpp:218
bool isObjCARCImplicitlyUnretainedType() const
Determines if this type, which must satisfy isObjCLifetimeType(), is implicitly __unsafe_unretained r...
Definition: Type.cpp:3888
TypeSourceInfo * getTypeSourceInfo() const
Definition: DeclObjC.h:844
bool isObjCRetainableType() const
Definition: Type.cpp:3926
static ObjCPropertyDecl::PropertyAttributeKind makePropertyAttributesAsWritten(unsigned Attributes)
void setInvalidDecl(bool Invalid=true)
setInvalidDecl - Indicates the Decl had a semantic error.
Definition: DeclBase.cpp:132
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:426
ObjCInterfaceDecl * getSuperClass() const
Definition: DeclObjC.cpp:331
Stores token information for comparing actual tokens with predefined values.
Definition: Preprocessor.h:88
ObjCPropertyDecl * FindPropertyVisibleInPrimaryClass(IdentifierInfo *PropertyId, ObjCPropertyQueryKind QueryKind) const
FindPropertyVisibleInPrimaryClass - Finds declaration of the property with name &#39;PropertyId&#39; in the p...
Definition: DeclObjC.cpp:362
bool RequireCompleteType(SourceLocation Loc, QualType T, TypeDiagnoser &Diagnoser)
Ensure that the type T is a complete type.
Definition: SemaType.cpp:7476
ParmVarDecl *const * param_iterator
Definition: DeclObjC.h:382
A std::pair-like structure for storing a qualified type split into its local qualifiers and its local...
Definition: Type.h:594
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:3838
ObjCIvarDecl * lookupInstanceVariable(IdentifierInfo *IVarName, ObjCInterfaceDecl *&ClassDeclared)
Definition: DeclObjC.cpp:614
clang::ObjCRuntime ObjCRuntime
Definition: LangOptions.h:165
propimpl_range property_impls() const
Definition: DeclObjC.h:2486
Qualifiers Quals
The local qualifiers.
Definition: Type.h:599
llvm::SmallDenseSet< const ObjCProtocolDecl *, 8 > ProtocolPropertySet
Definition: DeclObjC.h:1124
bool isInvalid() const
Definition: Ownership.h:170
bool isInstanceMethod() const
Definition: DeclObjC.h:452
Preprocessor & getPreprocessor() const
Definition: Sema.h:1210
Selector getSelector() const
Definition: DeclObjC.h:359
SourceLocation getLocEnd() const LLVM_READONLY
Definition: TypeLoc.h:155
QualType getType() const
Definition: DeclObjC.h:846
const SourceManager & SM
Definition: Format.cpp:1474
static StringRef getIdentifier(const Token &Tok)
ObjCKeywordKind
Provides a namespace for Objective-C keywords which start with an &#39;@&#39;.
Definition: TokenKinds.h:41
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:5890
RecordDecl * getDecl() const
Definition: Type.h:4139
void addAttr(Attr *A)
Definition: DeclBase.h:485
SourceLocation getLocStart() const LLVM_READONLY
Definition: DeclBase.h:409
There is no lifetime qualification on this type.
Definition: Type.h:171
void makeDeclVisibleInContext(NamedDecl *D)
Makes a declaration visible within this context.
Definition: DeclBase.cpp:1720
Assigning into this object requires the old value to be released and the new value to be retained...
Definition: Type.h:182
Kind
ActionResult - This structure is used while parsing/acting on expressions, stmts, etc...
Definition: Ownership.h:157
Encodes a location in the source.
bool getSynthesize() const
Definition: DeclObjC.h:2010
IdentifierInfo & get(StringRef Name)
Return the identifier token info for the specified named identifier.
ObjCPropertyQueryKind
Definition: DeclObjC.h:734
void setPropertyAttributesAsWritten(PropertyAttributeKind PRVal)
Definition: DeclObjC.h:873
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:829
ObjCCategoryDecl - Represents a category declaration.
Definition: DeclObjC.h:2299
CanQualType VoidTy
Definition: ASTContext.h:998
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:746
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:1888
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:2052
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:766
Assigning into this object requires a lifetime extension.
Definition: Type.h:188
bool hasFlexibleArrayMember() const
Definition: Decl.h:3650
bool hasSameUnqualifiedType(QualType T1, QualType T2) const
Determine whether the given types are equivalent after cvr-qualifiers have been removed.
Definition: ASTContext.h:2253
void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D)
void setSetterCXXAssignment(Expr *setterCXXAssignment)
Definition: DeclObjC.h:2880
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:1069
bool propertyTypesAreCompatible(QualType, QualType)
ExprResult PerformCopyInitialization(const InitializedEntity &Entity, SourceLocation EqualLoc, ExprResult Init, bool TopLevelOfInitList=false, bool AllowExplicit=false)
Definition: SemaInit.cpp:8706
const ObjCInterfaceDecl * getClassInterface() const
Definition: DeclObjC.h:2459
redecl_range redecls() const
Returns an iterator range for all the redeclarations of the same decl.
Definition: DeclBase.h:946
static ParmVarDecl * Create(ASTContext &C, DeclContext *DC, SourceLocation StartLoc, SourceLocation IdLoc, IdentifierInfo *Id, QualType T, TypeSourceInfo *TInfo, StorageClass S, Expr *DefArg)
Definition: Decl.cpp:2501
static void setImpliedPropertyAttributeForReadOnlyProperty(ObjCPropertyDecl *property, ObjCIvarDecl *ivar)
setImpliedPropertyAttributeForReadOnlyProperty - This routine evaludates life-time attributes for a &#39;...
Dataflow Directional Tag Classes.
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:229
void diagnoseNullResettableSynthesizedSetters(const ObjCImplDecl *impDecl)
Diagnose any null-resettable synthesized setters.
void setGetterName(Selector Sel, SourceLocation Loc=SourceLocation())
Definition: DeclObjC.h:926
DeclContext - This is used only as base class of specific decl types that can act as declaration cont...
Definition: DeclBase.h:1262
static bool SuperClassImplementsProperty(ObjCInterfaceDecl *IDecl, ObjCPropertyDecl *Prop)
PropertyAttributeKind getPropertyAttributesAsWritten() const
Definition: DeclObjC.h:869
The basic abstraction for the target Objective-C runtime.
Definition: ObjCRuntime.h:28
SourceLocation getLocStart() const LLVM_READONLY
Definition: TypeLoc.h:154
attr_range attrs() const
Definition: DeclBase.h:495
bool CheckARCMethodDecl(ObjCMethodDecl *method)
Check a method declaration for compatibility with the Objective-C ARC conventions.
llvm::DenseMap< std::pair< IdentifierInfo *, unsigned >, ObjCPropertyDecl * > PropertyMap
Definition: DeclObjC.h:1123
bool hasObjCLifetime() const
Definition: Type.h:342
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:5604
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:1702
ObjCImplementationDecl - Represents a class definition - this is where method definitions are specifi...
Definition: DeclObjC.h:2571
A helper class that allows the use of isa/cast/dyncast to detect TagType objects of structs/unions/cl...
Definition: Type.h:4129
void overwritePropertyAttributes(unsigned PRVal)
Definition: DeclObjC.h:865
T * getAttr() const
Definition: DeclBase.h:532
SourceLocation getGetterNameLoc() const
Definition: DeclSpec.h:861
bool hasSameType(QualType T1, QualType T2) const
Determine whether the given types T1 and T2 are equivalent.
Definition: ASTContext.h:2229
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:92
void addDecl(Decl *D)
Add the declaration D into this context.
Definition: DeclBase.cpp:1460
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:676
void setSetterName(Selector Sel, SourceLocation Loc=SourceLocation())
Definition: DeclObjC.h:934
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:513
SourceManager & getSourceManager()
Definition: ASTContext.h:645
bool isObjCObjectType() const
Definition: Type.h:6207
bool IsClassExtension() const
Definition: DeclObjC.h:2409
SourceLocation getIdentifierLoc() const
Definition: DeclSpec.h:2117
CanQualType getCanonicalType(QualType T) const
Return the canonical (structural) type corresponding to the specified potentially non-canonical type ...
Definition: ASTContext.h:2213
TypeLoc getTypeLoc() const
Return the TypeLoc wrapper for the type source info.
Definition: TypeLoc.h:239
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:185
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:9429
ObjCPropertyImplDecl * FindPropertyImplDecl(IdentifierInfo *propertyId, ObjCPropertyQueryKind queryKind) const
FindPropertyImplDecl - This method looks up a previous ObjCPropertyImplDecl added to the list of thos...
Definition: DeclObjC.cpp:2064
ObjCIvarDecl - Represents an ObjC instance variable.
Definition: DeclObjC.h:1964
static unsigned deducePropertyOwnershipFromType(Sema &S, QualType T)
DeclContext * CurContext
CurContext - This is the current declaration context of parsing.
Definition: Sema.h:331
unsigned kind
All of the diagnostics that can be emitted by the frontend.
Definition: DiagnosticIDs.h:61
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:129
void setPropertyAttributes(PropertyAttributeKind PRVal)
Definition: DeclObjC.h:861
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
Get the name of identifier for this declaration as a StringRef.
Definition: Decl.h:275
bool isArcWeakrefUnavailable() const
isArcWeakrefUnavailable - Checks for a class or one of its super classes to be incompatible with __we...
Definition: DeclObjC.cpp:406
static ObjCPropertyDecl * SelectPropertyForSynthesisFromProtocols(Sema &S, SourceLocation AtLoc, ObjCInterfaceDecl *ClassDecl, ObjCPropertyDecl *Property)
SelectPropertyForSynthesisFromProtocols - Finds the most appropriate property declaration that should...
bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, ObjCMethodDecl *Getter, SourceLocation Loc)
void DefaultSynthesizeProperties(Scope *S, ObjCImplDecl *IMPDecl, ObjCInterfaceDecl *IDecl, SourceLocation AtEnd)
DefaultSynthesizeProperties - This routine default synthesizes all properties which must be synthesiz...
static const unsigned OwnershipMask
A reference to a declared variable, function, enum, etc.
Definition: Expr.h:972
void addPropertyImplementation(ObjCPropertyImplDecl *property)
Definition: DeclObjC.cpp:2027
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:647
#define true
Definition: stdbool.h:32
An l-value expression is a reference to an object with independent storage.
Definition: Specifiers.h:114
A trivial tuple used to represent a source range.
ASTContext & Context
Definition: Sema.h:319
void setLexicalDeclContext(DeclContext *DC)
Definition: DeclBase.cpp:299
ObjCMethodDecl * getGetterMethodDecl() const
Definition: DeclObjC.h:939
QualType getObjCObjectPointerType(QualType OIT) const
Return a ObjCObjectPointerType type for the given ObjCObjectType.
ObjCMethodDecl * getInstanceMethod(Selector Sel, bool AllowHidden=false) const
Definition: DeclObjC.h:1105
ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, BinaryOperatorKind Opc, Expr *LHSExpr, Expr *RHSExpr)
Definition: SemaExpr.cpp:12485
llvm::DenseMap< const Stmt *, CFGBlock * > SMap
Definition: CFGStmtMap.cpp:22
AccessControl getAccessControl() const
Definition: DeclObjC.h:2003
bool isPropertyAccessor() const
Definition: DeclObjC.h:459
Selector getGetterName() const
Definition: DeclObjC.h:923
SourceLocation getLParenLoc() const
Definition: DeclObjC.h:841
void setType(QualType newType)
Definition: Decl.h:648
const LangOptions & getLangOpts() const
Definition: ASTContext.h:690
ObjCCategoryImplDecl - An object of this class encapsulates a category @implementation declaration...
Definition: DeclObjC.h:2518
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...
Attr - This represents one attribute.
Definition: Attr.h:43
SourceLocation getLocation() const
Definition: DeclBase.h:417
TypeSourceInfo * GetTypeForDeclarator(Declarator &D, Scope *S)
GetTypeForDeclarator - Convert the type for the specified declarator to Type instances.
Definition: SemaType.cpp:5039
QualType getType() const
Return the type wrapped by this type source info.
Definition: Decl.h:97
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:127
bool isUnavailable(std::string *Message=nullptr) const
Determine whether this declaration is marked &#39;unavailable&#39;.
Definition: DeclBase.h:678
static bool isIncompatiblePropertyAttribute(unsigned Attr1, unsigned Attr2, ObjCPropertyDecl::PropertyAttributeKind Kind)
Qualifiers::ObjCLifetime getObjCLifetime() const
Returns lifetime attribute of this type.
Definition: Type.h:1079
ObjCCategoryDecl * FindCategoryDeclaration(IdentifierInfo *CategoryId) const
FindCategoryDeclaration - Finds category declaration in the list of categories for this class and ret...
Definition: DeclObjC.cpp:1618