clang  6.0.0svn
SemaObjCProperty.cpp
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1 //===--- SemaObjCProperty.cpp - Semantic Analysis for ObjC @property ------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file implements semantic analysis for Objective C @property and
11 // @synthesize declarations.
12 //
13 //===----------------------------------------------------------------------===//
14 
17 #include "clang/AST/DeclObjC.h"
18 #include "clang/AST/ExprCXX.h"
19 #include "clang/AST/ExprObjC.h"
21 #include "clang/Lex/Lexer.h"
22 #include "clang/Lex/Preprocessor.h"
24 #include "llvm/ADT/DenseSet.h"
25 #include "llvm/ADT/SmallString.h"
26 
27 using namespace clang;
28 
29 //===----------------------------------------------------------------------===//
30 // Grammar actions.
31 //===----------------------------------------------------------------------===//
32 
33 /// getImpliedARCOwnership - Given a set of property attributes and a
34 /// type, infer an expected lifetime. The type's ownership qualification
35 /// is not considered.
36 ///
37 /// Returns OCL_None if the attributes as stated do not imply an ownership.
38 /// Never returns OCL_Autoreleasing.
41  QualType type) {
42  // retain, strong, copy, weak, and unsafe_unretained are only legal
43  // on properties of retainable pointer type.
48  } else if (attrs & ObjCPropertyDecl::OBJC_PR_weak) {
49  return Qualifiers::OCL_Weak;
52  }
53 
54  // assign can appear on other types, so we have to check the
55  // property type.
57  type->isObjCRetainableType()) {
59  }
60 
61  return Qualifiers::OCL_None;
62 }
63 
64 /// Check the internal consistency of a property declaration with
65 /// an explicit ownership qualifier.
67  ObjCPropertyDecl *property) {
68  if (property->isInvalidDecl()) return;
69 
71  = property->getPropertyAttributes();
72  Qualifiers::ObjCLifetime propertyLifetime
73  = property->getType().getObjCLifetime();
74 
75  assert(propertyLifetime != Qualifiers::OCL_None);
76 
77  Qualifiers::ObjCLifetime expectedLifetime
78  = getImpliedARCOwnership(propertyKind, property->getType());
79  if (!expectedLifetime) {
80  // We have a lifetime qualifier but no dominating property
81  // attribute. That's okay, but restore reasonable invariants by
82  // setting the property attribute according to the lifetime
83  // qualifier.
85  if (propertyLifetime == Qualifiers::OCL_Strong) {
87  } else if (propertyLifetime == Qualifiers::OCL_Weak) {
89  } else {
90  assert(propertyLifetime == Qualifiers::OCL_ExplicitNone);
92  }
93  property->setPropertyAttributes(attr);
94  return;
95  }
96 
97  if (propertyLifetime == expectedLifetime) return;
98 
99  property->setInvalidDecl();
100  S.Diag(property->getLocation(),
101  diag::err_arc_inconsistent_property_ownership)
102  << property->getDeclName()
103  << expectedLifetime
104  << propertyLifetime;
105 }
106 
107 /// \brief Check this Objective-C property against a property declared in the
108 /// given protocol.
109 static void
111  ObjCProtocolDecl *Proto,
112  llvm::SmallPtrSetImpl<ObjCProtocolDecl *> &Known) {
113  // Have we seen this protocol before?
114  if (!Known.insert(Proto).second)
115  return;
116 
117  // Look for a property with the same name.
118  DeclContext::lookup_result R = Proto->lookup(Prop->getDeclName());
119  for (unsigned I = 0, N = R.size(); I != N; ++I) {
120  if (ObjCPropertyDecl *ProtoProp = dyn_cast<ObjCPropertyDecl>(R[I])) {
121  S.DiagnosePropertyMismatch(Prop, ProtoProp, Proto->getIdentifier(), true);
122  return;
123  }
124  }
125 
126  // Check this property against any protocols we inherit.
127  for (auto *P : Proto->protocols())
128  CheckPropertyAgainstProtocol(S, Prop, P, Known);
129 }
130 
132  // In GC mode, just look for the __weak qualifier.
133  if (S.getLangOpts().getGC() != LangOptions::NonGC) {
134  if (T.isObjCGCWeak()) return ObjCDeclSpec::DQ_PR_weak;
135 
136  // In ARC/MRC, look for an explicit ownership qualifier.
137  // For some reason, this only applies to __weak.
138  } else if (auto ownership = T.getObjCLifetime()) {
139  switch (ownership) {
148  return 0;
149  }
150  llvm_unreachable("bad qualifier");
151  }
152 
153  return 0;
154 }
155 
156 static const unsigned OwnershipMask =
163 
164 static unsigned getOwnershipRule(unsigned attr) {
165  unsigned result = attr & OwnershipMask;
166 
167  // From an ownership perspective, assign and unsafe_unretained are
168  // identical; make sure one also implies the other.
169  if (result & (ObjCPropertyDecl::OBJC_PR_assign |
173  }
174 
175  return result;
176 }
177 
179  SourceLocation LParenLoc,
180  FieldDeclarator &FD,
181  ObjCDeclSpec &ODS,
182  Selector GetterSel,
183  Selector SetterSel,
184  tok::ObjCKeywordKind MethodImplKind,
185  DeclContext *lexicalDC) {
186  unsigned Attributes = ODS.getPropertyAttributes();
187  FD.D.setObjCWeakProperty((Attributes & ObjCDeclSpec::DQ_PR_weak) != 0);
188  TypeSourceInfo *TSI = GetTypeForDeclarator(FD.D, S);
189  QualType T = TSI->getType();
190  if (!getOwnershipRule(Attributes)) {
191  Attributes |= deducePropertyOwnershipFromType(*this, T);
192  }
193  bool isReadWrite = ((Attributes & ObjCDeclSpec::DQ_PR_readwrite) ||
194  // default is readwrite!
195  !(Attributes & ObjCDeclSpec::DQ_PR_readonly));
196 
197  // Proceed with constructing the ObjCPropertyDecls.
198  ObjCContainerDecl *ClassDecl = cast<ObjCContainerDecl>(CurContext);
199  ObjCPropertyDecl *Res = nullptr;
200  if (ObjCCategoryDecl *CDecl = dyn_cast<ObjCCategoryDecl>(ClassDecl)) {
201  if (CDecl->IsClassExtension()) {
202  Res = HandlePropertyInClassExtension(S, AtLoc, LParenLoc,
203  FD,
204  GetterSel, ODS.getGetterNameLoc(),
205  SetterSel, ODS.getSetterNameLoc(),
206  isReadWrite, Attributes,
207  ODS.getPropertyAttributes(),
208  T, TSI, MethodImplKind);
209  if (!Res)
210  return nullptr;
211  }
212  }
213 
214  if (!Res) {
215  Res = CreatePropertyDecl(S, ClassDecl, AtLoc, LParenLoc, FD,
216  GetterSel, ODS.getGetterNameLoc(), SetterSel,
217  ODS.getSetterNameLoc(), isReadWrite, Attributes,
218  ODS.getPropertyAttributes(), T, TSI,
219  MethodImplKind);
220  if (lexicalDC)
221  Res->setLexicalDeclContext(lexicalDC);
222  }
223 
224  // Validate the attributes on the @property.
225  CheckObjCPropertyAttributes(Res, AtLoc, Attributes,
226  (isa<ObjCInterfaceDecl>(ClassDecl) ||
227  isa<ObjCProtocolDecl>(ClassDecl)));
228 
229  // Check consistency if the type has explicit ownership qualification.
230  if (Res->getType().getObjCLifetime())
231  checkPropertyDeclWithOwnership(*this, Res);
232 
233  llvm::SmallPtrSet<ObjCProtocolDecl *, 16> KnownProtos;
234  if (ObjCInterfaceDecl *IFace = dyn_cast<ObjCInterfaceDecl>(ClassDecl)) {
235  // For a class, compare the property against a property in our superclass.
236  bool FoundInSuper = false;
237  ObjCInterfaceDecl *CurrentInterfaceDecl = IFace;
238  while (ObjCInterfaceDecl *Super = CurrentInterfaceDecl->getSuperClass()) {
239  DeclContext::lookup_result R = Super->lookup(Res->getDeclName());
240  for (unsigned I = 0, N = R.size(); I != N; ++I) {
241  if (ObjCPropertyDecl *SuperProp = dyn_cast<ObjCPropertyDecl>(R[I])) {
242  DiagnosePropertyMismatch(Res, SuperProp, Super->getIdentifier(), false);
243  FoundInSuper = true;
244  break;
245  }
246  }
247  if (FoundInSuper)
248  break;
249  else
250  CurrentInterfaceDecl = Super;
251  }
252 
253  if (FoundInSuper) {
254  // Also compare the property against a property in our protocols.
255  for (auto *P : CurrentInterfaceDecl->protocols()) {
256  CheckPropertyAgainstProtocol(*this, Res, P, KnownProtos);
257  }
258  } else {
259  // Slower path: look in all protocols we referenced.
260  for (auto *P : IFace->all_referenced_protocols()) {
261  CheckPropertyAgainstProtocol(*this, Res, P, KnownProtos);
262  }
263  }
264  } else if (ObjCCategoryDecl *Cat = dyn_cast<ObjCCategoryDecl>(ClassDecl)) {
265  // We don't check if class extension. Because properties in class extension
266  // are meant to override some of the attributes and checking has already done
267  // when property in class extension is constructed.
268  if (!Cat->IsClassExtension())
269  for (auto *P : Cat->protocols())
270  CheckPropertyAgainstProtocol(*this, Res, P, KnownProtos);
271  } else {
272  ObjCProtocolDecl *Proto = cast<ObjCProtocolDecl>(ClassDecl);
273  for (auto *P : Proto->protocols())
274  CheckPropertyAgainstProtocol(*this, Res, P, KnownProtos);
275  }
276 
278  return Res;
279 }
280 
282 makePropertyAttributesAsWritten(unsigned Attributes) {
283  unsigned attributesAsWritten = 0;
284  if (Attributes & ObjCDeclSpec::DQ_PR_readonly)
285  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_readonly;
286  if (Attributes & ObjCDeclSpec::DQ_PR_readwrite)
287  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_readwrite;
288  if (Attributes & ObjCDeclSpec::DQ_PR_getter)
289  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_getter;
290  if (Attributes & ObjCDeclSpec::DQ_PR_setter)
291  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_setter;
292  if (Attributes & ObjCDeclSpec::DQ_PR_assign)
293  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_assign;
294  if (Attributes & ObjCDeclSpec::DQ_PR_retain)
295  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_retain;
296  if (Attributes & ObjCDeclSpec::DQ_PR_strong)
297  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_strong;
298  if (Attributes & ObjCDeclSpec::DQ_PR_weak)
299  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_weak;
300  if (Attributes & ObjCDeclSpec::DQ_PR_copy)
301  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_copy;
302  if (Attributes & ObjCDeclSpec::DQ_PR_unsafe_unretained)
303  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_unsafe_unretained;
304  if (Attributes & ObjCDeclSpec::DQ_PR_nonatomic)
305  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_nonatomic;
306  if (Attributes & ObjCDeclSpec::DQ_PR_atomic)
307  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_atomic;
308  if (Attributes & ObjCDeclSpec::DQ_PR_class)
309  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_class;
310 
311  return (ObjCPropertyDecl::PropertyAttributeKind)attributesAsWritten;
312 }
313 
314 static bool LocPropertyAttribute( ASTContext &Context, const char *attrName,
315  SourceLocation LParenLoc, SourceLocation &Loc) {
316  if (LParenLoc.isMacroID())
317  return false;
318 
319  SourceManager &SM = Context.getSourceManager();
320  std::pair<FileID, unsigned> locInfo = SM.getDecomposedLoc(LParenLoc);
321  // Try to load the file buffer.
322  bool invalidTemp = false;
323  StringRef file = SM.getBufferData(locInfo.first, &invalidTemp);
324  if (invalidTemp)
325  return false;
326  const char *tokenBegin = file.data() + locInfo.second;
327 
328  // Lex from the start of the given location.
329  Lexer lexer(SM.getLocForStartOfFile(locInfo.first),
330  Context.getLangOpts(),
331  file.begin(), tokenBegin, file.end());
332  Token Tok;
333  do {
334  lexer.LexFromRawLexer(Tok);
335  if (Tok.is(tok::raw_identifier) && Tok.getRawIdentifier() == attrName) {
336  Loc = Tok.getLocation();
337  return true;
338  }
339  } while (Tok.isNot(tok::r_paren));
340  return false;
341 }
342 
343 /// Check for a mismatch in the atomicity of the given properties.
345  ObjCPropertyDecl *OldProperty,
346  ObjCPropertyDecl *NewProperty,
347  bool PropagateAtomicity) {
348  // If the atomicity of both matches, we're done.
349  bool OldIsAtomic =
351  == 0;
352  bool NewIsAtomic =
354  == 0;
355  if (OldIsAtomic == NewIsAtomic) return;
356 
357  // Determine whether the given property is readonly and implicitly
358  // atomic.
359  auto isImplicitlyReadonlyAtomic = [](ObjCPropertyDecl *Property) -> bool {
360  // Is it readonly?
361  auto Attrs = Property->getPropertyAttributes();
362  if ((Attrs & ObjCPropertyDecl::OBJC_PR_readonly) == 0) return false;
363 
364  // Is it nonatomic?
365  if (Attrs & ObjCPropertyDecl::OBJC_PR_nonatomic) return false;
366 
367  // Was 'atomic' specified directly?
368  if (Property->getPropertyAttributesAsWritten() &
370  return false;
371 
372  return true;
373  };
374 
375  // If we're allowed to propagate atomicity, and the new property did
376  // not specify atomicity at all, propagate.
377  const unsigned AtomicityMask =
379  if (PropagateAtomicity &&
380  ((NewProperty->getPropertyAttributesAsWritten() & AtomicityMask) == 0)) {
381  unsigned Attrs = NewProperty->getPropertyAttributes();
382  Attrs = Attrs & ~AtomicityMask;
383  if (OldIsAtomic)
385  else
387 
388  NewProperty->overwritePropertyAttributes(Attrs);
389  return;
390  }
391 
392  // One of the properties is atomic; if it's a readonly property, and
393  // 'atomic' wasn't explicitly specified, we're okay.
394  if ((OldIsAtomic && isImplicitlyReadonlyAtomic(OldProperty)) ||
395  (NewIsAtomic && isImplicitlyReadonlyAtomic(NewProperty)))
396  return;
397 
398  // Diagnose the conflict.
399  const IdentifierInfo *OldContextName;
400  auto *OldDC = OldProperty->getDeclContext();
401  if (auto Category = dyn_cast<ObjCCategoryDecl>(OldDC))
402  OldContextName = Category->getClassInterface()->getIdentifier();
403  else
404  OldContextName = cast<ObjCContainerDecl>(OldDC)->getIdentifier();
405 
406  S.Diag(NewProperty->getLocation(), diag::warn_property_attribute)
407  << NewProperty->getDeclName() << "atomic"
408  << OldContextName;
409  S.Diag(OldProperty->getLocation(), diag::note_property_declare);
410 }
411 
414  SourceLocation AtLoc,
415  SourceLocation LParenLoc,
416  FieldDeclarator &FD,
417  Selector GetterSel,
418  SourceLocation GetterNameLoc,
419  Selector SetterSel,
420  SourceLocation SetterNameLoc,
421  const bool isReadWrite,
422  unsigned &Attributes,
423  const unsigned AttributesAsWritten,
424  QualType T,
425  TypeSourceInfo *TSI,
426  tok::ObjCKeywordKind MethodImplKind) {
427  ObjCCategoryDecl *CDecl = cast<ObjCCategoryDecl>(CurContext);
428  // Diagnose if this property is already in continuation class.
429  DeclContext *DC = CurContext;
430  IdentifierInfo *PropertyId = FD.D.getIdentifier();
431  ObjCInterfaceDecl *CCPrimary = CDecl->getClassInterface();
432 
433  // We need to look in the @interface to see if the @property was
434  // already declared.
435  if (!CCPrimary) {
436  Diag(CDecl->getLocation(), diag::err_continuation_class);
437  return nullptr;
438  }
439 
440  bool isClassProperty = (AttributesAsWritten & ObjCDeclSpec::DQ_PR_class) ||
441  (Attributes & ObjCDeclSpec::DQ_PR_class);
442 
443  // Find the property in the extended class's primary class or
444  // extensions.
446  PropertyId, ObjCPropertyDecl::getQueryKind(isClassProperty));
447 
448  // If we found a property in an extension, complain.
449  if (PIDecl && isa<ObjCCategoryDecl>(PIDecl->getDeclContext())) {
450  Diag(AtLoc, diag::err_duplicate_property);
451  Diag(PIDecl->getLocation(), diag::note_property_declare);
452  return nullptr;
453  }
454 
455  // Check for consistency with the previous declaration, if there is one.
456  if (PIDecl) {
457  // A readonly property declared in the primary class can be refined
458  // by adding a readwrite property within an extension.
459  // Anything else is an error.
460  if (!(PIDecl->isReadOnly() && isReadWrite)) {
461  // Tailor the diagnostics for the common case where a readwrite
462  // property is declared both in the @interface and the continuation.
463  // This is a common error where the user often intended the original
464  // declaration to be readonly.
465  unsigned diag =
466  (Attributes & ObjCDeclSpec::DQ_PR_readwrite) &&
467  (PIDecl->getPropertyAttributesAsWritten() &
469  ? diag::err_use_continuation_class_redeclaration_readwrite
470  : diag::err_use_continuation_class;
471  Diag(AtLoc, diag)
472  << CCPrimary->getDeclName();
473  Diag(PIDecl->getLocation(), diag::note_property_declare);
474  return nullptr;
475  }
476 
477  // Check for consistency of getters.
478  if (PIDecl->getGetterName() != GetterSel) {
479  // If the getter was written explicitly, complain.
480  if (AttributesAsWritten & ObjCDeclSpec::DQ_PR_getter) {
481  Diag(AtLoc, diag::warn_property_redecl_getter_mismatch)
482  << PIDecl->getGetterName() << GetterSel;
483  Diag(PIDecl->getLocation(), diag::note_property_declare);
484  }
485 
486  // Always adopt the getter from the original declaration.
487  GetterSel = PIDecl->getGetterName();
488  Attributes |= ObjCDeclSpec::DQ_PR_getter;
489  }
490 
491  // Check consistency of ownership.
492  unsigned ExistingOwnership
494  unsigned NewOwnership = getOwnershipRule(Attributes);
495  if (ExistingOwnership && NewOwnership != ExistingOwnership) {
496  // If the ownership was written explicitly, complain.
497  if (getOwnershipRule(AttributesAsWritten)) {
498  Diag(AtLoc, diag::warn_property_attr_mismatch);
499  Diag(PIDecl->getLocation(), diag::note_property_declare);
500  }
501 
502  // Take the ownership from the original property.
503  Attributes = (Attributes & ~OwnershipMask) | ExistingOwnership;
504  }
505 
506  // If the redeclaration is 'weak' but the original property is not,
507  if ((Attributes & ObjCPropertyDecl::OBJC_PR_weak) &&
510  PIDecl->getType()->getAs<ObjCObjectPointerType>() &&
512  Diag(AtLoc, diag::warn_property_implicitly_mismatched);
513  Diag(PIDecl->getLocation(), diag::note_property_declare);
514  }
515  }
516 
517  // Create a new ObjCPropertyDecl with the DeclContext being
518  // the class extension.
519  ObjCPropertyDecl *PDecl = CreatePropertyDecl(S, CDecl, AtLoc, LParenLoc,
520  FD, GetterSel, GetterNameLoc,
521  SetterSel, SetterNameLoc,
522  isReadWrite,
523  Attributes, AttributesAsWritten,
524  T, TSI, MethodImplKind, DC);
525 
526  // If there was no declaration of a property with the same name in
527  // the primary class, we're done.
528  if (!PIDecl) {
529  ProcessPropertyDecl(PDecl);
530  return PDecl;
531  }
532 
533  if (!Context.hasSameType(PIDecl->getType(), PDecl->getType())) {
534  bool IncompatibleObjC = false;
535  QualType ConvertedType;
536  // Relax the strict type matching for property type in continuation class.
537  // Allow property object type of continuation class to be different as long
538  // as it narrows the object type in its primary class property. Note that
539  // this conversion is safe only because the wider type is for a 'readonly'
540  // property in primary class and 'narrowed' type for a 'readwrite' property
541  // in continuation class.
542  QualType PrimaryClassPropertyT = Context.getCanonicalType(PIDecl->getType());
543  QualType ClassExtPropertyT = Context.getCanonicalType(PDecl->getType());
544  if (!isa<ObjCObjectPointerType>(PrimaryClassPropertyT) ||
545  !isa<ObjCObjectPointerType>(ClassExtPropertyT) ||
546  (!isObjCPointerConversion(ClassExtPropertyT, PrimaryClassPropertyT,
547  ConvertedType, IncompatibleObjC))
548  || IncompatibleObjC) {
549  Diag(AtLoc,
550  diag::err_type_mismatch_continuation_class) << PDecl->getType();
551  Diag(PIDecl->getLocation(), diag::note_property_declare);
552  return nullptr;
553  }
554  }
555 
556  // Check that atomicity of property in class extension matches the previous
557  // declaration.
558  checkAtomicPropertyMismatch(*this, PIDecl, PDecl, true);
559 
560  // Make sure getter/setter are appropriately synthesized.
561  ProcessPropertyDecl(PDecl);
562  return PDecl;
563 }
564 
566  ObjCContainerDecl *CDecl,
567  SourceLocation AtLoc,
568  SourceLocation LParenLoc,
569  FieldDeclarator &FD,
570  Selector GetterSel,
571  SourceLocation GetterNameLoc,
572  Selector SetterSel,
573  SourceLocation SetterNameLoc,
574  const bool isReadWrite,
575  const unsigned Attributes,
576  const unsigned AttributesAsWritten,
577  QualType T,
578  TypeSourceInfo *TInfo,
579  tok::ObjCKeywordKind MethodImplKind,
580  DeclContext *lexicalDC){
581  IdentifierInfo *PropertyId = FD.D.getIdentifier();
582 
583  // Property defaults to 'assign' if it is readwrite, unless this is ARC
584  // and the type is retainable.
585  bool isAssign;
586  if (Attributes & (ObjCDeclSpec::DQ_PR_assign |
588  isAssign = true;
589  } else if (getOwnershipRule(Attributes) || !isReadWrite) {
590  isAssign = false;
591  } else {
592  isAssign = (!getLangOpts().ObjCAutoRefCount ||
593  !T->isObjCRetainableType());
594  }
595 
596  // Issue a warning if property is 'assign' as default and its
597  // object, which is gc'able conforms to NSCopying protocol
598  if (getLangOpts().getGC() != LangOptions::NonGC &&
599  isAssign && !(Attributes & ObjCDeclSpec::DQ_PR_assign)) {
600  if (const ObjCObjectPointerType *ObjPtrTy =
602  ObjCInterfaceDecl *IDecl = ObjPtrTy->getObjectType()->getInterface();
603  if (IDecl)
604  if (ObjCProtocolDecl* PNSCopying =
605  LookupProtocol(&Context.Idents.get("NSCopying"), AtLoc))
606  if (IDecl->ClassImplementsProtocol(PNSCopying, true))
607  Diag(AtLoc, diag::warn_implements_nscopying) << PropertyId;
608  }
609  }
610 
611  if (T->isObjCObjectType()) {
612  SourceLocation StarLoc = TInfo->getTypeLoc().getLocEnd();
613  StarLoc = getLocForEndOfToken(StarLoc);
614  Diag(FD.D.getIdentifierLoc(), diag::err_statically_allocated_object)
615  << FixItHint::CreateInsertion(StarLoc, "*");
617  SourceLocation TLoc = TInfo->getTypeLoc().getLocStart();
618  TInfo = Context.getTrivialTypeSourceInfo(T, TLoc);
619  }
620 
621  DeclContext *DC = cast<DeclContext>(CDecl);
623  FD.D.getIdentifierLoc(),
624  PropertyId, AtLoc,
625  LParenLoc, T, TInfo);
626 
627  bool isClassProperty = (AttributesAsWritten & ObjCDeclSpec::DQ_PR_class) ||
628  (Attributes & ObjCDeclSpec::DQ_PR_class);
629  // Class property and instance property can have the same name.
631  DC, PropertyId, ObjCPropertyDecl::getQueryKind(isClassProperty))) {
632  Diag(PDecl->getLocation(), diag::err_duplicate_property);
633  Diag(prevDecl->getLocation(), diag::note_property_declare);
634  PDecl->setInvalidDecl();
635  }
636  else {
637  DC->addDecl(PDecl);
638  if (lexicalDC)
639  PDecl->setLexicalDeclContext(lexicalDC);
640  }
641 
642  if (T->isArrayType() || T->isFunctionType()) {
643  Diag(AtLoc, diag::err_property_type) << T;
644  PDecl->setInvalidDecl();
645  }
646 
647  ProcessDeclAttributes(S, PDecl, FD.D);
648 
649  // Regardless of setter/getter attribute, we save the default getter/setter
650  // selector names in anticipation of declaration of setter/getter methods.
651  PDecl->setGetterName(GetterSel, GetterNameLoc);
652  PDecl->setSetterName(SetterSel, SetterNameLoc);
653  PDecl->setPropertyAttributesAsWritten(
654  makePropertyAttributesAsWritten(AttributesAsWritten));
655 
656  if (Attributes & ObjCDeclSpec::DQ_PR_readonly)
657  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_readonly);
658 
659  if (Attributes & ObjCDeclSpec::DQ_PR_getter)
660  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_getter);
661 
662  if (Attributes & ObjCDeclSpec::DQ_PR_setter)
663  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_setter);
664 
665  if (isReadWrite)
666  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_readwrite);
667 
668  if (Attributes & ObjCDeclSpec::DQ_PR_retain)
669  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_retain);
670 
671  if (Attributes & ObjCDeclSpec::DQ_PR_strong)
672  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_strong);
673 
674  if (Attributes & ObjCDeclSpec::DQ_PR_weak)
675  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_weak);
676 
677  if (Attributes & ObjCDeclSpec::DQ_PR_copy)
678  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_copy);
679 
680  if (Attributes & ObjCDeclSpec::DQ_PR_unsafe_unretained)
681  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_unsafe_unretained);
682 
683  if (isAssign)
684  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_assign);
685 
686  // In the semantic attributes, one of nonatomic or atomic is always set.
687  if (Attributes & ObjCDeclSpec::DQ_PR_nonatomic)
688  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_nonatomic);
689  else
690  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_atomic);
691 
692  // 'unsafe_unretained' is alias for 'assign'.
693  if (Attributes & ObjCDeclSpec::DQ_PR_unsafe_unretained)
694  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_assign);
695  if (isAssign)
696  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_unsafe_unretained);
697 
698  if (MethodImplKind == tok::objc_required)
699  PDecl->setPropertyImplementation(ObjCPropertyDecl::Required);
700  else if (MethodImplKind == tok::objc_optional)
701  PDecl->setPropertyImplementation(ObjCPropertyDecl::Optional);
702 
703  if (Attributes & ObjCDeclSpec::DQ_PR_nullability)
704  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_nullability);
705 
706  if (Attributes & ObjCDeclSpec::DQ_PR_null_resettable)
707  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_null_resettable);
708 
709  if (Attributes & ObjCDeclSpec::DQ_PR_class)
710  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_class);
711 
712  return PDecl;
713 }
714 
715 static void checkARCPropertyImpl(Sema &S, SourceLocation propertyImplLoc,
716  ObjCPropertyDecl *property,
717  ObjCIvarDecl *ivar) {
718  if (property->isInvalidDecl() || ivar->isInvalidDecl()) return;
719 
720  QualType ivarType = ivar->getType();
721  Qualifiers::ObjCLifetime ivarLifetime = ivarType.getObjCLifetime();
722 
723  // The lifetime implied by the property's attributes.
724  Qualifiers::ObjCLifetime propertyLifetime =
726  property->getType());
727 
728  // We're fine if they match.
729  if (propertyLifetime == ivarLifetime) return;
730 
731  // None isn't a valid lifetime for an object ivar in ARC, and
732  // __autoreleasing is never valid; don't diagnose twice.
733  if ((ivarLifetime == Qualifiers::OCL_None &&
734  S.getLangOpts().ObjCAutoRefCount) ||
735  ivarLifetime == Qualifiers::OCL_Autoreleasing)
736  return;
737 
738  // If the ivar is private, and it's implicitly __unsafe_unretained
739  // becaues of its type, then pretend it was actually implicitly
740  // __strong. This is only sound because we're processing the
741  // property implementation before parsing any method bodies.
742  if (ivarLifetime == Qualifiers::OCL_ExplicitNone &&
743  propertyLifetime == Qualifiers::OCL_Strong &&
745  SplitQualType split = ivarType.split();
746  if (split.Quals.hasObjCLifetime()) {
747  assert(ivarType->isObjCARCImplicitlyUnretainedType());
749  ivarType = S.Context.getQualifiedType(split);
750  ivar->setType(ivarType);
751  return;
752  }
753  }
754 
755  switch (propertyLifetime) {
757  S.Diag(ivar->getLocation(), diag::err_arc_strong_property_ownership)
758  << property->getDeclName()
759  << ivar->getDeclName()
760  << ivarLifetime;
761  break;
762 
764  S.Diag(ivar->getLocation(), diag::err_weak_property)
765  << property->getDeclName()
766  << ivar->getDeclName();
767  break;
768 
770  S.Diag(ivar->getLocation(), diag::err_arc_assign_property_ownership)
771  << property->getDeclName()
772  << ivar->getDeclName()
773  << ((property->getPropertyAttributesAsWritten()
775  break;
776 
778  llvm_unreachable("properties cannot be autoreleasing");
779 
781  // Any other property should be ignored.
782  return;
783  }
784 
785  S.Diag(property->getLocation(), diag::note_property_declare);
786  if (propertyImplLoc.isValid())
787  S.Diag(propertyImplLoc, diag::note_property_synthesize);
788 }
789 
790 /// setImpliedPropertyAttributeForReadOnlyProperty -
791 /// This routine evaludates life-time attributes for a 'readonly'
792 /// property with no known lifetime of its own, using backing
793 /// 'ivar's attribute, if any. If no backing 'ivar', property's
794 /// life-time is assumed 'strong'.
796  ObjCPropertyDecl *property, ObjCIvarDecl *ivar) {
797  Qualifiers::ObjCLifetime propertyLifetime =
799  property->getType());
800  if (propertyLifetime != Qualifiers::OCL_None)
801  return;
802 
803  if (!ivar) {
804  // if no backing ivar, make property 'strong'.
805  property->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_strong);
806  return;
807  }
808  // property assumes owenership of backing ivar.
809  QualType ivarType = ivar->getType();
810  Qualifiers::ObjCLifetime ivarLifetime = ivarType.getObjCLifetime();
811  if (ivarLifetime == Qualifiers::OCL_Strong)
812  property->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_strong);
813  else if (ivarLifetime == Qualifiers::OCL_Weak)
814  property->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_weak);
815 }
816 
817 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  if (isIncompatiblePropertyAttribute(OriginalAttributes, Attr,
902  Diag(OriginalAttributes & ObjCPropertyDecl::OBJC_PR_copy, "copy");
903  continue;
904  }
906  OriginalAttributes, Attr, ObjCPropertyDecl::OBJC_PR_retain |
908  Diag(OriginalAttributes & (ObjCPropertyDecl::OBJC_PR_retain |
910  "retain (or strong)");
911  continue;
912  }
913  if (isIncompatiblePropertyAttribute(OriginalAttributes, Attr,
915  Diag(OriginalAttributes & ObjCPropertyDecl::OBJC_PR_atomic, "atomic");
916  continue;
917  }
918  }
919  if (Property->getGetterName() != Prop->getGetterName()) {
920  Mismatches.push_back({Prop, DifferentGetter, ""});
921  continue;
922  }
923  if (!Property->isReadOnly() && !Prop->isReadOnly() &&
924  Property->getSetterName() != Prop->getSetterName()) {
925  Mismatches.push_back({Prop, DifferentSetter, ""});
926  continue;
927  }
928  QualType LHSType = S.Context.getCanonicalType(Prop->getType());
929  if (!S.Context.propertyTypesAreCompatible(LHSType, RHSType)) {
930  bool IncompatibleObjC = false;
931  QualType ConvertedType;
932  if (!S.isObjCPointerConversion(RHSType, LHSType, ConvertedType, IncompatibleObjC)
933  || IncompatibleObjC) {
934  Mismatches.push_back({Prop, IncompatibleType, ""});
935  continue;
936  }
937  }
938  }
939 
940  if (Mismatches.empty())
941  return Property;
942 
943  // Diagnose incompability.
944  {
945  bool HasIncompatibleAttributes = false;
946  for (const auto &Note : Mismatches)
947  HasIncompatibleAttributes =
948  Note.Kind != IncompatibleType ? true : HasIncompatibleAttributes;
949  // Promote the warning to an error if there are incompatible attributes or
950  // incompatible types together with readwrite/readonly incompatibility.
951  auto Diag = S.Diag(Property->getLocation(),
952  Property != OriginalProperty || HasIncompatibleAttributes
953  ? diag::err_protocol_property_mismatch
954  : diag::warn_protocol_property_mismatch);
955  Diag << Mismatches[0].Kind;
956  switch (Mismatches[0].Kind) {
957  case IncompatibleType:
958  Diag << Property->getType();
959  break;
960  case HasNoExpectedAttribute:
961  case HasUnexpectedAttribute:
962  Diag << Mismatches[0].AttributeName;
963  break;
964  case DifferentGetter:
965  Diag << Property->getGetterName();
966  break;
967  case DifferentSetter:
968  Diag << Property->getSetterName();
969  break;
970  }
971  }
972  for (const auto &Note : Mismatches) {
973  auto Diag =
974  S.Diag(Note.Prop->getLocation(), diag::note_protocol_property_declare)
975  << Note.Kind;
976  switch (Note.Kind) {
977  case IncompatibleType:
978  Diag << Note.Prop->getType();
979  break;
980  case HasNoExpectedAttribute:
981  case HasUnexpectedAttribute:
982  Diag << Note.AttributeName;
983  break;
984  case DifferentGetter:
985  Diag << Note.Prop->getGetterName();
986  break;
987  case DifferentSetter:
988  Diag << Note.Prop->getSetterName();
989  break;
990  }
991  }
992  if (AtLoc.isValid())
993  S.Diag(AtLoc, diag::note_property_synthesize);
994 
995  return Property;
996 }
997 
998 /// Determine whether any storage attributes were written on the property.
1000  ObjCPropertyQueryKind QueryKind) {
1001  if (Prop->getPropertyAttributesAsWritten() & OwnershipMask) return true;
1002 
1003  // If this is a readwrite property in a class extension that refines
1004  // a readonly property in the original class definition, check it as
1005  // well.
1006 
1007  // If it's a readonly property, we're not interested.
1008  if (Prop->isReadOnly()) return false;
1009 
1010  // Is it declared in an extension?
1011  auto Category = dyn_cast<ObjCCategoryDecl>(Prop->getDeclContext());
1012  if (!Category || !Category->IsClassExtension()) return false;
1013 
1014  // Find the corresponding property in the primary class definition.
1015  auto OrigClass = Category->getClassInterface();
1016  for (auto Found : OrigClass->lookup(Prop->getDeclName())) {
1017  if (ObjCPropertyDecl *OrigProp = dyn_cast<ObjCPropertyDecl>(Found))
1018  return OrigProp->getPropertyAttributesAsWritten() & OwnershipMask;
1019  }
1020 
1021  // Look through all of the protocols.
1022  for (const auto *Proto : OrigClass->all_referenced_protocols()) {
1023  if (ObjCPropertyDecl *OrigProp = Proto->FindPropertyDeclaration(
1024  Prop->getIdentifier(), QueryKind))
1025  return OrigProp->getPropertyAttributesAsWritten() & OwnershipMask;
1026  }
1027 
1028  return false;
1029 }
1030 
1031 /// ActOnPropertyImplDecl - This routine performs semantic checks and
1032 /// builds the AST node for a property implementation declaration; declared
1033 /// as \@synthesize or \@dynamic.
1034 ///
1036  SourceLocation AtLoc,
1037  SourceLocation PropertyLoc,
1038  bool Synthesize,
1039  IdentifierInfo *PropertyId,
1040  IdentifierInfo *PropertyIvar,
1041  SourceLocation PropertyIvarLoc,
1042  ObjCPropertyQueryKind QueryKind) {
1043  ObjCContainerDecl *ClassImpDecl =
1044  dyn_cast<ObjCContainerDecl>(CurContext);
1045  // Make sure we have a context for the property implementation declaration.
1046  if (!ClassImpDecl) {
1047  Diag(AtLoc, diag::err_missing_property_context);
1048  return nullptr;
1049  }
1050  if (PropertyIvarLoc.isInvalid())
1051  PropertyIvarLoc = PropertyLoc;
1052  SourceLocation PropertyDiagLoc = PropertyLoc;
1053  if (PropertyDiagLoc.isInvalid())
1054  PropertyDiagLoc = ClassImpDecl->getLocStart();
1055  ObjCPropertyDecl *property = nullptr;
1056  ObjCInterfaceDecl *IDecl = nullptr;
1057  // Find the class or category class where this property must have
1058  // a declaration.
1059  ObjCImplementationDecl *IC = nullptr;
1060  ObjCCategoryImplDecl *CatImplClass = nullptr;
1061  if ((IC = dyn_cast<ObjCImplementationDecl>(ClassImpDecl))) {
1062  IDecl = IC->getClassInterface();
1063  // We always synthesize an interface for an implementation
1064  // without an interface decl. So, IDecl is always non-zero.
1065  assert(IDecl &&
1066  "ActOnPropertyImplDecl - @implementation without @interface");
1067 
1068  // Look for this property declaration in the @implementation's @interface
1069  property = IDecl->FindPropertyDeclaration(PropertyId, QueryKind);
1070  if (!property) {
1071  Diag(PropertyLoc, diag::err_bad_property_decl) << IDecl->getDeclName();
1072  return nullptr;
1073  }
1074  if (property->isClassProperty() && Synthesize) {
1075  Diag(PropertyLoc, diag::err_synthesize_on_class_property) << PropertyId;
1076  return nullptr;
1077  }
1078  unsigned PIkind = property->getPropertyAttributesAsWritten();
1079  if ((PIkind & (ObjCPropertyDecl::OBJC_PR_atomic |
1081  if (AtLoc.isValid())
1082  Diag(AtLoc, diag::warn_implicit_atomic_property);
1083  else
1084  Diag(IC->getLocation(), diag::warn_auto_implicit_atomic_property);
1085  Diag(property->getLocation(), diag::note_property_declare);
1086  }
1087 
1088  if (const ObjCCategoryDecl *CD =
1089  dyn_cast<ObjCCategoryDecl>(property->getDeclContext())) {
1090  if (!CD->IsClassExtension()) {
1091  Diag(PropertyLoc, diag::err_category_property) << CD->getDeclName();
1092  Diag(property->getLocation(), diag::note_property_declare);
1093  return nullptr;
1094  }
1095  }
1096  if (Synthesize&&
1098  property->hasAttr<IBOutletAttr>() &&
1099  !AtLoc.isValid()) {
1100  bool ReadWriteProperty = false;
1101  // Search into the class extensions and see if 'readonly property is
1102  // redeclared 'readwrite', then no warning is to be issued.
1103  for (auto *Ext : IDecl->known_extensions()) {
1104  DeclContext::lookup_result R = Ext->lookup(property->getDeclName());
1105  if (!R.empty())
1106  if (ObjCPropertyDecl *ExtProp = dyn_cast<ObjCPropertyDecl>(R[0])) {
1107  PIkind = ExtProp->getPropertyAttributesAsWritten();
1108  if (PIkind & ObjCPropertyDecl::OBJC_PR_readwrite) {
1109  ReadWriteProperty = true;
1110  break;
1111  }
1112  }
1113  }
1114 
1115  if (!ReadWriteProperty) {
1116  Diag(property->getLocation(), diag::warn_auto_readonly_iboutlet_property)
1117  << property;
1118  SourceLocation readonlyLoc;
1119  if (LocPropertyAttribute(Context, "readonly",
1120  property->getLParenLoc(), readonlyLoc)) {
1121  SourceLocation endLoc =
1122  readonlyLoc.getLocWithOffset(strlen("readonly")-1);
1123  SourceRange ReadonlySourceRange(readonlyLoc, endLoc);
1124  Diag(property->getLocation(),
1125  diag::note_auto_readonly_iboutlet_fixup_suggest) <<
1126  FixItHint::CreateReplacement(ReadonlySourceRange, "readwrite");
1127  }
1128  }
1129  }
1130  if (Synthesize && isa<ObjCProtocolDecl>(property->getDeclContext()))
1131  property = SelectPropertyForSynthesisFromProtocols(*this, AtLoc, IDecl,
1132  property);
1133 
1134  } else if ((CatImplClass = dyn_cast<ObjCCategoryImplDecl>(ClassImpDecl))) {
1135  if (Synthesize) {
1136  Diag(AtLoc, diag::err_synthesize_category_decl);
1137  return nullptr;
1138  }
1139  IDecl = CatImplClass->getClassInterface();
1140  if (!IDecl) {
1141  Diag(AtLoc, diag::err_missing_property_interface);
1142  return nullptr;
1143  }
1145  IDecl->FindCategoryDeclaration(CatImplClass->getIdentifier());
1146 
1147  // If category for this implementation not found, it is an error which
1148  // has already been reported eralier.
1149  if (!Category)
1150  return nullptr;
1151  // Look for this property declaration in @implementation's category
1152  property = Category->FindPropertyDeclaration(PropertyId, QueryKind);
1153  if (!property) {
1154  Diag(PropertyLoc, diag::err_bad_category_property_decl)
1155  << Category->getDeclName();
1156  return nullptr;
1157  }
1158  } else {
1159  Diag(AtLoc, diag::err_bad_property_context);
1160  return nullptr;
1161  }
1162  ObjCIvarDecl *Ivar = nullptr;
1163  bool CompleteTypeErr = false;
1164  bool compat = true;
1165  // Check that we have a valid, previously declared ivar for @synthesize
1166  if (Synthesize) {
1167  // @synthesize
1168  if (!PropertyIvar)
1169  PropertyIvar = PropertyId;
1170  // Check that this is a previously declared 'ivar' in 'IDecl' interface
1171  ObjCInterfaceDecl *ClassDeclared;
1172  Ivar = IDecl->lookupInstanceVariable(PropertyIvar, ClassDeclared);
1173  QualType PropType = property->getType();
1174  QualType PropertyIvarType = PropType.getNonReferenceType();
1175 
1176  if (RequireCompleteType(PropertyDiagLoc, PropertyIvarType,
1177  diag::err_incomplete_synthesized_property,
1178  property->getDeclName())) {
1179  Diag(property->getLocation(), diag::note_property_declare);
1180  CompleteTypeErr = true;
1181  }
1182 
1183  if (getLangOpts().ObjCAutoRefCount &&
1184  (property->getPropertyAttributesAsWritten() &
1186  PropertyIvarType->isObjCRetainableType()) {
1188  }
1189 
1191  = property->getPropertyAttributes();
1192 
1193  bool isARCWeak = false;
1194  if (kind & ObjCPropertyDecl::OBJC_PR_weak) {
1195  // Add GC __weak to the ivar type if the property is weak.
1196  if (getLangOpts().getGC() != LangOptions::NonGC) {
1197  assert(!getLangOpts().ObjCAutoRefCount);
1198  if (PropertyIvarType.isObjCGCStrong()) {
1199  Diag(PropertyDiagLoc, diag::err_gc_weak_property_strong_type);
1200  Diag(property->getLocation(), diag::note_property_declare);
1201  } else {
1202  PropertyIvarType =
1203  Context.getObjCGCQualType(PropertyIvarType, Qualifiers::Weak);
1204  }
1205 
1206  // Otherwise, check whether ARC __weak is enabled and works with
1207  // the property type.
1208  } else {
1209  if (!getLangOpts().ObjCWeak) {
1210  // Only complain here when synthesizing an ivar.
1211  if (!Ivar) {
1212  Diag(PropertyDiagLoc,
1213  getLangOpts().ObjCWeakRuntime
1214  ? diag::err_synthesizing_arc_weak_property_disabled
1215  : diag::err_synthesizing_arc_weak_property_no_runtime);
1216  Diag(property->getLocation(), diag::note_property_declare);
1217  }
1218  CompleteTypeErr = true; // suppress later diagnostics about the ivar
1219  } else {
1220  isARCWeak = true;
1221  if (const ObjCObjectPointerType *ObjT =
1222  PropertyIvarType->getAs<ObjCObjectPointerType>()) {
1223  const ObjCInterfaceDecl *ObjI = ObjT->getInterfaceDecl();
1224  if (ObjI && ObjI->isArcWeakrefUnavailable()) {
1225  Diag(property->getLocation(),
1226  diag::err_arc_weak_unavailable_property)
1227  << PropertyIvarType;
1228  Diag(ClassImpDecl->getLocation(), diag::note_implemented_by_class)
1229  << ClassImpDecl->getName();
1230  }
1231  }
1232  }
1233  }
1234  }
1235 
1236  if (AtLoc.isInvalid()) {
1237  // Check when default synthesizing a property that there is
1238  // an ivar matching property name and issue warning; since this
1239  // is the most common case of not using an ivar used for backing
1240  // property in non-default synthesis case.
1241  ObjCInterfaceDecl *ClassDeclared=nullptr;
1242  ObjCIvarDecl *originalIvar =
1243  IDecl->lookupInstanceVariable(property->getIdentifier(),
1244  ClassDeclared);
1245  if (originalIvar) {
1246  Diag(PropertyDiagLoc,
1247  diag::warn_autosynthesis_property_ivar_match)
1248  << PropertyId << (Ivar == nullptr) << PropertyIvar
1249  << originalIvar->getIdentifier();
1250  Diag(property->getLocation(), diag::note_property_declare);
1251  Diag(originalIvar->getLocation(), diag::note_ivar_decl);
1252  }
1253  }
1254 
1255  if (!Ivar) {
1256  // In ARC, give the ivar a lifetime qualifier based on the
1257  // property attributes.
1258  if ((getLangOpts().ObjCAutoRefCount || isARCWeak) &&
1259  !PropertyIvarType.getObjCLifetime() &&
1260  PropertyIvarType->isObjCRetainableType()) {
1261 
1262  // It's an error if we have to do this and the user didn't
1263  // explicitly write an ownership attribute on the property.
1264  if (!hasWrittenStorageAttribute(property, QueryKind) &&
1266  Diag(PropertyDiagLoc,
1267  diag::err_arc_objc_property_default_assign_on_object);
1268  Diag(property->getLocation(), diag::note_property_declare);
1269  } else {
1270  Qualifiers::ObjCLifetime lifetime =
1271  getImpliedARCOwnership(kind, PropertyIvarType);
1272  assert(lifetime && "no lifetime for property?");
1273 
1274  Qualifiers qs;
1275  qs.addObjCLifetime(lifetime);
1276  PropertyIvarType = Context.getQualifiedType(PropertyIvarType, qs);
1277  }
1278  }
1279 
1280  Ivar = ObjCIvarDecl::Create(Context, ClassImpDecl,
1281  PropertyIvarLoc,PropertyIvarLoc, PropertyIvar,
1282  PropertyIvarType, /*Dinfo=*/nullptr,
1284  (Expr *)nullptr, true);
1285  if (RequireNonAbstractType(PropertyIvarLoc,
1286  PropertyIvarType,
1287  diag::err_abstract_type_in_decl,
1289  Diag(property->getLocation(), diag::note_property_declare);
1290  // An abstract type is as bad as an incomplete type.
1291  CompleteTypeErr = true;
1292  }
1293  if (!CompleteTypeErr) {
1294  const RecordType *RecordTy = PropertyIvarType->getAs<RecordType>();
1295  if (RecordTy && RecordTy->getDecl()->hasFlexibleArrayMember()) {
1296  Diag(PropertyIvarLoc, diag::err_synthesize_variable_sized_ivar)
1297  << PropertyIvarType;
1298  CompleteTypeErr = true; // suppress later diagnostics about the ivar
1299  }
1300  }
1301  if (CompleteTypeErr)
1302  Ivar->setInvalidDecl();
1303  ClassImpDecl->addDecl(Ivar);
1304  IDecl->makeDeclVisibleInContext(Ivar);
1305 
1307  Diag(PropertyDiagLoc, diag::err_missing_property_ivar_decl)
1308  << PropertyId;
1309  // Note! I deliberately want it to fall thru so, we have a
1310  // a property implementation and to avoid future warnings.
1311  } else if (getLangOpts().ObjCRuntime.isNonFragile() &&
1312  !declaresSameEntity(ClassDeclared, IDecl)) {
1313  Diag(PropertyDiagLoc, diag::err_ivar_in_superclass_use)
1314  << property->getDeclName() << Ivar->getDeclName()
1315  << ClassDeclared->getDeclName();
1316  Diag(Ivar->getLocation(), diag::note_previous_access_declaration)
1317  << Ivar << Ivar->getName();
1318  // Note! I deliberately want it to fall thru so more errors are caught.
1319  }
1320  property->setPropertyIvarDecl(Ivar);
1321 
1322  QualType IvarType = Context.getCanonicalType(Ivar->getType());
1323 
1324  // Check that type of property and its ivar are type compatible.
1325  if (!Context.hasSameType(PropertyIvarType, IvarType)) {
1326  if (isa<ObjCObjectPointerType>(PropertyIvarType)
1327  && isa<ObjCObjectPointerType>(IvarType))
1328  compat =
1330  PropertyIvarType->getAs<ObjCObjectPointerType>(),
1331  IvarType->getAs<ObjCObjectPointerType>());
1332  else {
1333  compat = (CheckAssignmentConstraints(PropertyIvarLoc, PropertyIvarType,
1334  IvarType)
1335  == Compatible);
1336  }
1337  if (!compat) {
1338  Diag(PropertyDiagLoc, diag::err_property_ivar_type)
1339  << property->getDeclName() << PropType
1340  << Ivar->getDeclName() << IvarType;
1341  Diag(Ivar->getLocation(), diag::note_ivar_decl);
1342  // Note! I deliberately want it to fall thru so, we have a
1343  // a property implementation and to avoid future warnings.
1344  }
1345  else {
1346  // FIXME! Rules for properties are somewhat different that those
1347  // for assignments. Use a new routine to consolidate all cases;
1348  // specifically for property redeclarations as well as for ivars.
1349  QualType lhsType =Context.getCanonicalType(PropertyIvarType).getUnqualifiedType();
1350  QualType rhsType =Context.getCanonicalType(IvarType).getUnqualifiedType();
1351  if (lhsType != rhsType &&
1352  lhsType->isArithmeticType()) {
1353  Diag(PropertyDiagLoc, diag::err_property_ivar_type)
1354  << property->getDeclName() << PropType
1355  << Ivar->getDeclName() << IvarType;
1356  Diag(Ivar->getLocation(), diag::note_ivar_decl);
1357  // Fall thru - see previous comment
1358  }
1359  }
1360  // __weak is explicit. So it works on Canonical type.
1361  if ((PropType.isObjCGCWeak() && !IvarType.isObjCGCWeak() &&
1362  getLangOpts().getGC() != LangOptions::NonGC)) {
1363  Diag(PropertyDiagLoc, diag::err_weak_property)
1364  << property->getDeclName() << Ivar->getDeclName();
1365  Diag(Ivar->getLocation(), diag::note_ivar_decl);
1366  // Fall thru - see previous comment
1367  }
1368  // Fall thru - see previous comment
1369  if ((property->getType()->isObjCObjectPointerType() ||
1370  PropType.isObjCGCStrong()) && IvarType.isObjCGCWeak() &&
1371  getLangOpts().getGC() != LangOptions::NonGC) {
1372  Diag(PropertyDiagLoc, diag::err_strong_property)
1373  << property->getDeclName() << Ivar->getDeclName();
1374  // Fall thru - see previous comment
1375  }
1376  }
1377  if (getLangOpts().ObjCAutoRefCount || isARCWeak ||
1378  Ivar->getType().getObjCLifetime())
1379  checkARCPropertyImpl(*this, PropertyLoc, property, Ivar);
1380  } else if (PropertyIvar)
1381  // @dynamic
1382  Diag(PropertyDiagLoc, diag::err_dynamic_property_ivar_decl);
1383 
1384  assert (property && "ActOnPropertyImplDecl - property declaration missing");
1385  ObjCPropertyImplDecl *PIDecl =
1386  ObjCPropertyImplDecl::Create(Context, CurContext, AtLoc, PropertyLoc,
1387  property,
1388  (Synthesize ?
1391  Ivar, PropertyIvarLoc);
1392 
1393  if (CompleteTypeErr || !compat)
1394  PIDecl->setInvalidDecl();
1395 
1396  if (ObjCMethodDecl *getterMethod = property->getGetterMethodDecl()) {
1397  getterMethod->createImplicitParams(Context, IDecl);
1398  if (getLangOpts().CPlusPlus && Synthesize && !CompleteTypeErr &&
1399  Ivar->getType()->isRecordType()) {
1400  // For Objective-C++, need to synthesize the AST for the IVAR object to be
1401  // returned by the getter as it must conform to C++'s copy-return rules.
1402  // FIXME. Eventually we want to do this for Objective-C as well.
1403  SynthesizedFunctionScope Scope(*this, getterMethod);
1404  ImplicitParamDecl *SelfDecl = getterMethod->getSelfDecl();
1405  DeclRefExpr *SelfExpr =
1406  new (Context) DeclRefExpr(SelfDecl, false, SelfDecl->getType(),
1407  VK_LValue, PropertyDiagLoc);
1408  MarkDeclRefReferenced(SelfExpr);
1409  Expr *LoadSelfExpr =
1411  CK_LValueToRValue, SelfExpr, nullptr,
1412  VK_RValue);
1413  Expr *IvarRefExpr =
1414  new (Context) ObjCIvarRefExpr(Ivar,
1415  Ivar->getUsageType(SelfDecl->getType()),
1416  PropertyDiagLoc,
1417  Ivar->getLocation(),
1418  LoadSelfExpr, true, true);
1420  InitializedEntity::InitializeResult(PropertyDiagLoc,
1421  getterMethod->getReturnType(),
1422  /*NRVO=*/false),
1423  PropertyDiagLoc, IvarRefExpr);
1424  if (!Res.isInvalid()) {
1425  Expr *ResExpr = Res.getAs<Expr>();
1426  if (ResExpr)
1427  ResExpr = MaybeCreateExprWithCleanups(ResExpr);
1428  PIDecl->setGetterCXXConstructor(ResExpr);
1429  }
1430  }
1431  if (property->hasAttr<NSReturnsNotRetainedAttr>() &&
1432  !getterMethod->hasAttr<NSReturnsNotRetainedAttr>()) {
1433  Diag(getterMethod->getLocation(),
1434  diag::warn_property_getter_owning_mismatch);
1435  Diag(property->getLocation(), diag::note_property_declare);
1436  }
1437  if (getLangOpts().ObjCAutoRefCount && Synthesize)
1438  switch (getterMethod->getMethodFamily()) {
1439  case OMF_retain:
1440  case OMF_retainCount:
1441  case OMF_release:
1442  case OMF_autorelease:
1443  Diag(getterMethod->getLocation(), diag::err_arc_illegal_method_def)
1444  << 1 << getterMethod->getSelector();
1445  break;
1446  default:
1447  break;
1448  }
1449  }
1450  if (ObjCMethodDecl *setterMethod = property->getSetterMethodDecl()) {
1451  setterMethod->createImplicitParams(Context, IDecl);
1452  if (getLangOpts().CPlusPlus && Synthesize && !CompleteTypeErr &&
1453  Ivar->getType()->isRecordType()) {
1454  // FIXME. Eventually we want to do this for Objective-C as well.
1455  SynthesizedFunctionScope Scope(*this, setterMethod);
1456  ImplicitParamDecl *SelfDecl = setterMethod->getSelfDecl();
1457  DeclRefExpr *SelfExpr =
1458  new (Context) DeclRefExpr(SelfDecl, false, SelfDecl->getType(),
1459  VK_LValue, PropertyDiagLoc);
1460  MarkDeclRefReferenced(SelfExpr);
1461  Expr *LoadSelfExpr =
1463  CK_LValueToRValue, SelfExpr, nullptr,
1464  VK_RValue);
1465  Expr *lhs =
1466  new (Context) ObjCIvarRefExpr(Ivar,
1467  Ivar->getUsageType(SelfDecl->getType()),
1468  PropertyDiagLoc,
1469  Ivar->getLocation(),
1470  LoadSelfExpr, true, true);
1471  ObjCMethodDecl::param_iterator P = setterMethod->param_begin();
1472  ParmVarDecl *Param = (*P);
1473  QualType T = Param->getType().getNonReferenceType();
1474  DeclRefExpr *rhs = new (Context) DeclRefExpr(Param, false, T,
1475  VK_LValue, PropertyDiagLoc);
1476  MarkDeclRefReferenced(rhs);
1477  ExprResult Res = BuildBinOp(S, PropertyDiagLoc,
1478  BO_Assign, lhs, rhs);
1479  if (property->getPropertyAttributes() &
1481  Expr *callExpr = Res.getAs<Expr>();
1482  if (const CXXOperatorCallExpr *CXXCE =
1483  dyn_cast_or_null<CXXOperatorCallExpr>(callExpr))
1484  if (const FunctionDecl *FuncDecl = CXXCE->getDirectCallee())
1485  if (!FuncDecl->isTrivial())
1486  if (property->getType()->isReferenceType()) {
1487  Diag(PropertyDiagLoc,
1488  diag::err_atomic_property_nontrivial_assign_op)
1489  << property->getType();
1490  Diag(FuncDecl->getLocStart(),
1491  diag::note_callee_decl) << FuncDecl;
1492  }
1493  }
1494  PIDecl->setSetterCXXAssignment(Res.getAs<Expr>());
1495  }
1496  }
1497 
1498  if (IC) {
1499  if (Synthesize)
1500  if (ObjCPropertyImplDecl *PPIDecl =
1501  IC->FindPropertyImplIvarDecl(PropertyIvar)) {
1502  Diag(PropertyLoc, diag::err_duplicate_ivar_use)
1503  << PropertyId << PPIDecl->getPropertyDecl()->getIdentifier()
1504  << PropertyIvar;
1505  Diag(PPIDecl->getLocation(), diag::note_previous_use);
1506  }
1507 
1508  if (ObjCPropertyImplDecl *PPIDecl
1509  = IC->FindPropertyImplDecl(PropertyId, QueryKind)) {
1510  Diag(PropertyLoc, diag::err_property_implemented) << PropertyId;
1511  Diag(PPIDecl->getLocation(), diag::note_previous_declaration);
1512  return nullptr;
1513  }
1514  IC->addPropertyImplementation(PIDecl);
1515  if (getLangOpts().ObjCDefaultSynthProperties &&
1517  !IDecl->isObjCRequiresPropertyDefs()) {
1518  // Diagnose if an ivar was lazily synthesdized due to a previous
1519  // use and if 1) property is @dynamic or 2) property is synthesized
1520  // but it requires an ivar of different name.
1521  ObjCInterfaceDecl *ClassDeclared=nullptr;
1522  ObjCIvarDecl *Ivar = nullptr;
1523  if (!Synthesize)
1524  Ivar = IDecl->lookupInstanceVariable(PropertyId, ClassDeclared);
1525  else {
1526  if (PropertyIvar && PropertyIvar != PropertyId)
1527  Ivar = IDecl->lookupInstanceVariable(PropertyId, ClassDeclared);
1528  }
1529  // Issue diagnostics only if Ivar belongs to current class.
1530  if (Ivar && Ivar->getSynthesize() &&
1531  declaresSameEntity(IC->getClassInterface(), ClassDeclared)) {
1532  Diag(Ivar->getLocation(), diag::err_undeclared_var_use)
1533  << PropertyId;
1534  Ivar->setInvalidDecl();
1535  }
1536  }
1537  } else {
1538  if (Synthesize)
1539  if (ObjCPropertyImplDecl *PPIDecl =
1540  CatImplClass->FindPropertyImplIvarDecl(PropertyIvar)) {
1541  Diag(PropertyDiagLoc, diag::err_duplicate_ivar_use)
1542  << PropertyId << PPIDecl->getPropertyDecl()->getIdentifier()
1543  << PropertyIvar;
1544  Diag(PPIDecl->getLocation(), diag::note_previous_use);
1545  }
1546 
1547  if (ObjCPropertyImplDecl *PPIDecl =
1548  CatImplClass->FindPropertyImplDecl(PropertyId, QueryKind)) {
1549  Diag(PropertyDiagLoc, diag::err_property_implemented) << PropertyId;
1550  Diag(PPIDecl->getLocation(), diag::note_previous_declaration);
1551  return nullptr;
1552  }
1553  CatImplClass->addPropertyImplementation(PIDecl);
1554  }
1555 
1556  return PIDecl;
1557 }
1558 
1559 //===----------------------------------------------------------------------===//
1560 // Helper methods.
1561 //===----------------------------------------------------------------------===//
1562 
1563 /// DiagnosePropertyMismatch - Compares two properties for their
1564 /// attributes and types and warns on a variety of inconsistencies.
1565 ///
1566 void
1568  ObjCPropertyDecl *SuperProperty,
1569  const IdentifierInfo *inheritedName,
1570  bool OverridingProtocolProperty) {
1572  Property->getPropertyAttributes();
1574  SuperProperty->getPropertyAttributes();
1575 
1576  // We allow readonly properties without an explicit ownership
1577  // (assign/unsafe_unretained/weak/retain/strong/copy) in super class
1578  // to be overridden by a property with any explicit ownership in the subclass.
1579  if (!OverridingProtocolProperty &&
1580  !getOwnershipRule(SAttr) && getOwnershipRule(CAttr))
1581  ;
1582  else {
1585  Diag(Property->getLocation(), diag::warn_readonly_property)
1586  << Property->getDeclName() << inheritedName;
1587  if ((CAttr & ObjCPropertyDecl::OBJC_PR_copy)
1588  != (SAttr & ObjCPropertyDecl::OBJC_PR_copy))
1589  Diag(Property->getLocation(), diag::warn_property_attribute)
1590  << Property->getDeclName() << "copy" << inheritedName;
1591  else if (!(SAttr & ObjCPropertyDecl::OBJC_PR_readonly)){
1592  unsigned CAttrRetain =
1593  (CAttr &
1595  unsigned SAttrRetain =
1596  (SAttr &
1598  bool CStrong = (CAttrRetain != 0);
1599  bool SStrong = (SAttrRetain != 0);
1600  if (CStrong != SStrong)
1601  Diag(Property->getLocation(), diag::warn_property_attribute)
1602  << Property->getDeclName() << "retain (or strong)" << inheritedName;
1603  }
1604  }
1605 
1606  // Check for nonatomic; note that nonatomic is effectively
1607  // meaningless for readonly properties, so don't diagnose if the
1608  // atomic property is 'readonly'.
1609  checkAtomicPropertyMismatch(*this, SuperProperty, Property, false);
1610  // Readonly properties from protocols can be implemented as "readwrite"
1611  // with a custom setter name.
1612  if (Property->getSetterName() != SuperProperty->getSetterName() &&
1613  !(SuperProperty->isReadOnly() &&
1614  isa<ObjCProtocolDecl>(SuperProperty->getDeclContext()))) {
1615  Diag(Property->getLocation(), diag::warn_property_attribute)
1616  << Property->getDeclName() << "setter" << inheritedName;
1617  Diag(SuperProperty->getLocation(), diag::note_property_declare);
1618  }
1619  if (Property->getGetterName() != SuperProperty->getGetterName()) {
1620  Diag(Property->getLocation(), diag::warn_property_attribute)
1621  << Property->getDeclName() << "getter" << inheritedName;
1622  Diag(SuperProperty->getLocation(), diag::note_property_declare);
1623  }
1624 
1625  QualType LHSType =
1626  Context.getCanonicalType(SuperProperty->getType());
1627  QualType RHSType =
1628  Context.getCanonicalType(Property->getType());
1629 
1630  if (!Context.propertyTypesAreCompatible(LHSType, RHSType)) {
1631  // Do cases not handled in above.
1632  // FIXME. For future support of covariant property types, revisit this.
1633  bool IncompatibleObjC = false;
1634  QualType ConvertedType;
1635  if (!isObjCPointerConversion(RHSType, LHSType,
1636  ConvertedType, IncompatibleObjC) ||
1637  IncompatibleObjC) {
1638  Diag(Property->getLocation(), diag::warn_property_types_are_incompatible)
1639  << Property->getType() << SuperProperty->getType() << inheritedName;
1640  Diag(SuperProperty->getLocation(), diag::note_property_declare);
1641  }
1642  }
1643 }
1644 
1646  ObjCMethodDecl *GetterMethod,
1647  SourceLocation Loc) {
1648  if (!GetterMethod)
1649  return false;
1650  QualType GetterType = GetterMethod->getReturnType().getNonReferenceType();
1651  QualType PropertyRValueType =
1652  property->getType().getNonReferenceType().getAtomicUnqualifiedType();
1653  bool compat = Context.hasSameType(PropertyRValueType, GetterType);
1654  if (!compat) {
1655  const ObjCObjectPointerType *propertyObjCPtr = nullptr;
1656  const ObjCObjectPointerType *getterObjCPtr = nullptr;
1657  if ((propertyObjCPtr =
1658  PropertyRValueType->getAs<ObjCObjectPointerType>()) &&
1659  (getterObjCPtr = GetterType->getAs<ObjCObjectPointerType>()))
1660  compat = Context.canAssignObjCInterfaces(getterObjCPtr, propertyObjCPtr);
1661  else if (CheckAssignmentConstraints(Loc, GetterType, PropertyRValueType)
1662  != Compatible) {
1663  Diag(Loc, diag::err_property_accessor_type)
1664  << property->getDeclName() << PropertyRValueType
1665  << GetterMethod->getSelector() << GetterType;
1666  Diag(GetterMethod->getLocation(), diag::note_declared_at);
1667  return true;
1668  } else {
1669  compat = true;
1670  QualType lhsType = Context.getCanonicalType(PropertyRValueType);
1671  QualType rhsType =Context.getCanonicalType(GetterType).getUnqualifiedType();
1672  if (lhsType != rhsType && lhsType->isArithmeticType())
1673  compat = false;
1674  }
1675  }
1676 
1677  if (!compat) {
1678  Diag(Loc, diag::warn_accessor_property_type_mismatch)
1679  << property->getDeclName()
1680  << GetterMethod->getSelector();
1681  Diag(GetterMethod->getLocation(), diag::note_declared_at);
1682  return true;
1683  }
1684 
1685  return false;
1686 }
1687 
1688 /// CollectImmediateProperties - This routine collects all properties in
1689 /// the class and its conforming protocols; but not those in its super class.
1690 static void
1693  ObjCContainerDecl::PropertyMap &SuperPropMap,
1694  bool CollectClassPropsOnly = false,
1695  bool IncludeProtocols = true) {
1696  if (ObjCInterfaceDecl *IDecl = dyn_cast<ObjCInterfaceDecl>(CDecl)) {
1697  for (auto *Prop : IDecl->properties()) {
1698  if (CollectClassPropsOnly && !Prop->isClassProperty())
1699  continue;
1700  PropMap[std::make_pair(Prop->getIdentifier(), Prop->isClassProperty())] =
1701  Prop;
1702  }
1703 
1704  // Collect the properties from visible extensions.
1705  for (auto *Ext : IDecl->visible_extensions())
1706  CollectImmediateProperties(Ext, PropMap, SuperPropMap,
1707  CollectClassPropsOnly, IncludeProtocols);
1708 
1709  if (IncludeProtocols) {
1710  // Scan through class's protocols.
1711  for (auto *PI : IDecl->all_referenced_protocols())
1712  CollectImmediateProperties(PI, PropMap, SuperPropMap,
1713  CollectClassPropsOnly);
1714  }
1715  }
1716  if (ObjCCategoryDecl *CATDecl = dyn_cast<ObjCCategoryDecl>(CDecl)) {
1717  for (auto *Prop : CATDecl->properties()) {
1718  if (CollectClassPropsOnly && !Prop->isClassProperty())
1719  continue;
1720  PropMap[std::make_pair(Prop->getIdentifier(), Prop->isClassProperty())] =
1721  Prop;
1722  }
1723  if (IncludeProtocols) {
1724  // Scan through class's protocols.
1725  for (auto *PI : CATDecl->protocols())
1726  CollectImmediateProperties(PI, PropMap, SuperPropMap,
1727  CollectClassPropsOnly);
1728  }
1729  }
1730  else if (ObjCProtocolDecl *PDecl = dyn_cast<ObjCProtocolDecl>(CDecl)) {
1731  for (auto *Prop : PDecl->properties()) {
1732  if (CollectClassPropsOnly && !Prop->isClassProperty())
1733  continue;
1734  ObjCPropertyDecl *PropertyFromSuper =
1735  SuperPropMap[std::make_pair(Prop->getIdentifier(),
1736  Prop->isClassProperty())];
1737  // Exclude property for protocols which conform to class's super-class,
1738  // as super-class has to implement the property.
1739  if (!PropertyFromSuper ||
1740  PropertyFromSuper->getIdentifier() != Prop->getIdentifier()) {
1741  ObjCPropertyDecl *&PropEntry =
1742  PropMap[std::make_pair(Prop->getIdentifier(),
1743  Prop->isClassProperty())];
1744  if (!PropEntry)
1745  PropEntry = Prop;
1746  }
1747  }
1748  // Scan through protocol's protocols.
1749  for (auto *PI : PDecl->protocols())
1750  CollectImmediateProperties(PI, PropMap, SuperPropMap,
1751  CollectClassPropsOnly);
1752  }
1753 }
1754 
1755 /// CollectSuperClassPropertyImplementations - This routine collects list of
1756 /// properties to be implemented in super class(s) and also coming from their
1757 /// conforming protocols.
1759  ObjCInterfaceDecl::PropertyMap &PropMap) {
1760  if (ObjCInterfaceDecl *SDecl = CDecl->getSuperClass()) {
1762  while (SDecl) {
1763  SDecl->collectPropertiesToImplement(PropMap, PO);
1764  SDecl = SDecl->getSuperClass();
1765  }
1766  }
1767 }
1768 
1769 /// IvarBacksCurrentMethodAccessor - This routine returns 'true' if 'IV' is
1770 /// an ivar synthesized for 'Method' and 'Method' is a property accessor
1771 /// declared in class 'IFace'.
1772 bool
1774  ObjCMethodDecl *Method, ObjCIvarDecl *IV) {
1775  if (!IV->getSynthesize())
1776  return false;
1777  ObjCMethodDecl *IMD = IFace->lookupMethod(Method->getSelector(),
1778  Method->isInstanceMethod());
1779  if (!IMD || !IMD->isPropertyAccessor())
1780  return false;
1781 
1782  // look up a property declaration whose one of its accessors is implemented
1783  // by this method.
1784  for (const auto *Property : IFace->instance_properties()) {
1785  if ((Property->getGetterName() == IMD->getSelector() ||
1786  Property->getSetterName() == IMD->getSelector()) &&
1787  (Property->getPropertyIvarDecl() == IV))
1788  return true;
1789  }
1790  // Also look up property declaration in class extension whose one of its
1791  // accessors is implemented by this method.
1792  for (const auto *Ext : IFace->known_extensions())
1793  for (const auto *Property : Ext->instance_properties())
1794  if ((Property->getGetterName() == IMD->getSelector() ||
1795  Property->getSetterName() == IMD->getSelector()) &&
1796  (Property->getPropertyIvarDecl() == IV))
1797  return true;
1798  return false;
1799 }
1800 
1802  ObjCPropertyDecl *Prop) {
1803  bool SuperClassImplementsGetter = false;
1804  bool SuperClassImplementsSetter = false;
1806  SuperClassImplementsSetter = true;
1807 
1808  while (IDecl->getSuperClass()) {
1809  ObjCInterfaceDecl *SDecl = IDecl->getSuperClass();
1810  if (!SuperClassImplementsGetter && SDecl->getInstanceMethod(Prop->getGetterName()))
1811  SuperClassImplementsGetter = true;
1812 
1813  if (!SuperClassImplementsSetter && SDecl->getInstanceMethod(Prop->getSetterName()))
1814  SuperClassImplementsSetter = true;
1815  if (SuperClassImplementsGetter && SuperClassImplementsSetter)
1816  return true;
1817  IDecl = IDecl->getSuperClass();
1818  }
1819  return false;
1820 }
1821 
1822 /// \brief Default synthesizes all properties which must be synthesized
1823 /// in class's \@implementation.
1825  ObjCInterfaceDecl *IDecl,
1826  SourceLocation AtEnd) {
1829  IDecl->collectPropertiesToImplement(PropMap, PropertyOrder);
1830  if (PropMap.empty())
1831  return;
1832  ObjCInterfaceDecl::PropertyMap SuperPropMap;
1833  CollectSuperClassPropertyImplementations(IDecl, SuperPropMap);
1834 
1835  for (unsigned i = 0, e = PropertyOrder.size(); i != e; i++) {
1836  ObjCPropertyDecl *Prop = PropertyOrder[i];
1837  // Is there a matching property synthesize/dynamic?
1838  if (Prop->isInvalidDecl() ||
1839  Prop->isClassProperty() ||
1841  continue;
1842  // Property may have been synthesized by user.
1843  if (IMPDecl->FindPropertyImplDecl(
1844  Prop->getIdentifier(), Prop->getQueryKind()))
1845  continue;
1846  if (IMPDecl->getInstanceMethod(Prop->getGetterName())) {
1848  continue;
1849  if (IMPDecl->getInstanceMethod(Prop->getSetterName()))
1850  continue;
1851  }
1852  if (ObjCPropertyImplDecl *PID =
1853  IMPDecl->FindPropertyImplIvarDecl(Prop->getIdentifier())) {
1854  Diag(Prop->getLocation(), diag::warn_no_autosynthesis_shared_ivar_property)
1855  << Prop->getIdentifier();
1856  if (PID->getLocation().isValid())
1857  Diag(PID->getLocation(), diag::note_property_synthesize);
1858  continue;
1859  }
1860  ObjCPropertyDecl *PropInSuperClass =
1861  SuperPropMap[std::make_pair(Prop->getIdentifier(),
1862  Prop->isClassProperty())];
1863  if (ObjCProtocolDecl *Proto =
1864  dyn_cast<ObjCProtocolDecl>(Prop->getDeclContext())) {
1865  // We won't auto-synthesize properties declared in protocols.
1866  // Suppress the warning if class's superclass implements property's
1867  // getter and implements property's setter (if readwrite property).
1868  // Or, if property is going to be implemented in its super class.
1869  if (!SuperClassImplementsProperty(IDecl, Prop) && !PropInSuperClass) {
1870  Diag(IMPDecl->getLocation(),
1871  diag::warn_auto_synthesizing_protocol_property)
1872  << Prop << Proto;
1873  Diag(Prop->getLocation(), diag::note_property_declare);
1874  std::string FixIt =
1875  (Twine("@synthesize ") + Prop->getName() + ";\n\n").str();
1876  Diag(AtEnd, diag::note_add_synthesize_directive)
1877  << FixItHint::CreateInsertion(AtEnd, FixIt);
1878  }
1879  continue;
1880  }
1881  // If property to be implemented in the super class, ignore.
1882  if (PropInSuperClass) {
1884  (PropInSuperClass->getPropertyAttributes() &
1886  !IMPDecl->getInstanceMethod(Prop->getSetterName()) &&
1887  !IDecl->HasUserDeclaredSetterMethod(Prop)) {
1888  Diag(Prop->getLocation(), diag::warn_no_autosynthesis_property)
1889  << Prop->getIdentifier();
1890  Diag(PropInSuperClass->getLocation(), diag::note_property_declare);
1891  }
1892  else {
1893  Diag(Prop->getLocation(), diag::warn_autosynthesis_property_in_superclass)
1894  << Prop->getIdentifier();
1895  Diag(PropInSuperClass->getLocation(), diag::note_property_declare);
1896  Diag(IMPDecl->getLocation(), diag::note_while_in_implementation);
1897  }
1898  continue;
1899  }
1900  // We use invalid SourceLocations for the synthesized ivars since they
1901  // aren't really synthesized at a particular location; they just exist.
1902  // Saying that they are located at the @implementation isn't really going
1903  // to help users.
1904  ObjCPropertyImplDecl *PIDecl = dyn_cast_or_null<ObjCPropertyImplDecl>(
1906  true,
1907  /* property = */ Prop->getIdentifier(),
1908  /* ivar = */ Prop->getDefaultSynthIvarName(Context),
1909  Prop->getLocation(), Prop->getQueryKind()));
1910  if (PIDecl && !Prop->isUnavailable()) {
1911  Diag(Prop->getLocation(), diag::warn_missing_explicit_synthesis);
1912  Diag(IMPDecl->getLocation(), diag::note_while_in_implementation);
1913  }
1914  }
1915 }
1916 
1918  SourceLocation AtEnd) {
1919  if (!LangOpts.ObjCDefaultSynthProperties || LangOpts.ObjCRuntime.isFragile())
1920  return;
1921  ObjCImplementationDecl *IC=dyn_cast_or_null<ObjCImplementationDecl>(D);
1922  if (!IC)
1923  return;
1924  if (ObjCInterfaceDecl* IDecl = IC->getClassInterface())
1925  if (!IDecl->isObjCRequiresPropertyDefs())
1926  DefaultSynthesizeProperties(S, IC, IDecl, AtEnd);
1927 }
1928 
1930  Sema &S, ObjCInterfaceDecl *PrimaryClass, Selector Method,
1931  ObjCImplDecl *IMPDecl, ObjCContainerDecl *CDecl, ObjCCategoryDecl *C,
1932  ObjCPropertyDecl *Prop,
1933  llvm::SmallPtrSet<const ObjCMethodDecl *, 8> &SMap) {
1934  // Check to see if we have a corresponding selector in SMap and with the
1935  // right method type.
1936  auto I = std::find_if(SMap.begin(), SMap.end(),
1937  [&](const ObjCMethodDecl *x) {
1938  return x->getSelector() == Method &&
1939  x->isClassMethod() == Prop->isClassProperty();
1940  });
1941  // When reporting on missing property setter/getter implementation in
1942  // categories, do not report when they are declared in primary class,
1943  // class's protocol, or one of it super classes. This is because,
1944  // the class is going to implement them.
1945  if (I == SMap.end() &&
1946  (PrimaryClass == nullptr ||
1947  !PrimaryClass->lookupPropertyAccessor(Method, C,
1948  Prop->isClassProperty()))) {
1949  unsigned diag =
1950  isa<ObjCCategoryDecl>(CDecl)
1951  ? (Prop->isClassProperty()
1952  ? diag::warn_impl_required_in_category_for_class_property
1953  : diag::warn_setter_getter_impl_required_in_category)
1954  : (Prop->isClassProperty()
1955  ? diag::warn_impl_required_for_class_property
1956  : diag::warn_setter_getter_impl_required);
1957  S.Diag(IMPDecl->getLocation(), diag) << Prop->getDeclName() << Method;
1958  S.Diag(Prop->getLocation(), diag::note_property_declare);
1959  if (S.LangOpts.ObjCDefaultSynthProperties &&
1961  if (ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(CDecl))
1962  if (const ObjCInterfaceDecl *RID = ID->isObjCRequiresPropertyDefs())
1963  S.Diag(RID->getLocation(), diag::note_suppressed_class_declare);
1964  }
1965 }
1966 
1968  ObjCContainerDecl *CDecl,
1969  bool SynthesizeProperties) {
1971  ObjCInterfaceDecl *IDecl = dyn_cast<ObjCInterfaceDecl>(CDecl);
1972 
1973  // Since we don't synthesize class properties, we should emit diagnose even
1974  // if SynthesizeProperties is true.
1975  ObjCContainerDecl::PropertyMap NoNeedToImplPropMap;
1976  // Gather properties which need not be implemented in this class
1977  // or category.
1978  if (!IDecl)
1979  if (ObjCCategoryDecl *C = dyn_cast<ObjCCategoryDecl>(CDecl)) {
1980  // For categories, no need to implement properties declared in
1981  // its primary class (and its super classes) if property is
1982  // declared in one of those containers.
1983  if ((IDecl = C->getClassInterface())) {
1985  IDecl->collectPropertiesToImplement(NoNeedToImplPropMap, PO);
1986  }
1987  }
1988  if (IDecl)
1989  CollectSuperClassPropertyImplementations(IDecl, NoNeedToImplPropMap);
1990 
1991  // When SynthesizeProperties is true, we only check class properties.
1992  CollectImmediateProperties(CDecl, PropMap, NoNeedToImplPropMap,
1993  SynthesizeProperties/*CollectClassPropsOnly*/);
1994 
1995  // Scan the @interface to see if any of the protocols it adopts
1996  // require an explicit implementation, via attribute
1997  // 'objc_protocol_requires_explicit_implementation'.
1998  if (IDecl) {
1999  std::unique_ptr<ObjCContainerDecl::PropertyMap> LazyMap;
2000 
2001  for (auto *PDecl : IDecl->all_referenced_protocols()) {
2002  if (!PDecl->hasAttr<ObjCExplicitProtocolImplAttr>())
2003  continue;
2004  // Lazily construct a set of all the properties in the @interface
2005  // of the class, without looking at the superclass. We cannot
2006  // use the call to CollectImmediateProperties() above as that
2007  // utilizes information from the super class's properties as well
2008  // as scans the adopted protocols. This work only triggers for protocols
2009  // with the attribute, which is very rare, and only occurs when
2010  // analyzing the @implementation.
2011  if (!LazyMap) {
2012  ObjCContainerDecl::PropertyMap NoNeedToImplPropMap;
2013  LazyMap.reset(new ObjCContainerDecl::PropertyMap());
2014  CollectImmediateProperties(CDecl, *LazyMap, NoNeedToImplPropMap,
2015  /* CollectClassPropsOnly */ false,
2016  /* IncludeProtocols */ false);
2017  }
2018  // Add the properties of 'PDecl' to the list of properties that
2019  // need to be implemented.
2020  for (auto *PropDecl : PDecl->properties()) {
2021  if ((*LazyMap)[std::make_pair(PropDecl->getIdentifier(),
2022  PropDecl->isClassProperty())])
2023  continue;
2024  PropMap[std::make_pair(PropDecl->getIdentifier(),
2025  PropDecl->isClassProperty())] = PropDecl;
2026  }
2027  }
2028  }
2029 
2030  if (PropMap.empty())
2031  return;
2032 
2034  for (const auto *I : IMPDecl->property_impls())
2035  PropImplMap.insert(I->getPropertyDecl());
2036 
2037  llvm::SmallPtrSet<const ObjCMethodDecl *, 8> InsMap;
2038  // Collect property accessors implemented in current implementation.
2039  for (const auto *I : IMPDecl->methods())
2040  InsMap.insert(I);
2041 
2042  ObjCCategoryDecl *C = dyn_cast<ObjCCategoryDecl>(CDecl);
2043  ObjCInterfaceDecl *PrimaryClass = nullptr;
2044  if (C && !C->IsClassExtension())
2045  if ((PrimaryClass = C->getClassInterface()))
2046  // Report unimplemented properties in the category as well.
2047  if (ObjCImplDecl *IMP = PrimaryClass->getImplementation()) {
2048  // When reporting on missing setter/getters, do not report when
2049  // setter/getter is implemented in category's primary class
2050  // implementation.
2051  for (const auto *I : IMP->methods())
2052  InsMap.insert(I);
2053  }
2054 
2055  for (ObjCContainerDecl::PropertyMap::iterator
2056  P = PropMap.begin(), E = PropMap.end(); P != E; ++P) {
2057  ObjCPropertyDecl *Prop = P->second;
2058  // Is there a matching property synthesize/dynamic?
2059  if (Prop->isInvalidDecl() ||
2061  PropImplMap.count(Prop) ||
2062  Prop->getAvailability() == AR_Unavailable)
2063  continue;
2064 
2065  // Diagnose unimplemented getters and setters.
2067  PrimaryClass, Prop->getGetterName(), IMPDecl, CDecl, C, Prop, InsMap);
2068  if (!Prop->isReadOnly())
2070  PrimaryClass, Prop->getSetterName(),
2071  IMPDecl, CDecl, C, Prop, InsMap);
2072  }
2073 }
2074 
2076  for (const auto *propertyImpl : impDecl->property_impls()) {
2077  const auto *property = propertyImpl->getPropertyDecl();
2078 
2079  // Warn about null_resettable properties with synthesized setters,
2080  // because the setter won't properly handle nil.
2081  if (propertyImpl->getPropertyImplementation()
2083  (property->getPropertyAttributes() &
2085  property->getGetterMethodDecl() &&
2086  property->getSetterMethodDecl()) {
2087  auto *getterMethod = property->getGetterMethodDecl();
2088  auto *setterMethod = property->getSetterMethodDecl();
2089  if (!impDecl->getInstanceMethod(setterMethod->getSelector()) &&
2090  !impDecl->getInstanceMethod(getterMethod->getSelector())) {
2091  SourceLocation loc = propertyImpl->getLocation();
2092  if (loc.isInvalid())
2093  loc = impDecl->getLocStart();
2094 
2095  Diag(loc, diag::warn_null_resettable_setter)
2096  << setterMethod->getSelector() << property->getDeclName();
2097  }
2098  }
2099  }
2100 }
2101 
2102 void
2104  ObjCInterfaceDecl* IDecl) {
2105  // Rules apply in non-GC mode only
2106  if (getLangOpts().getGC() != LangOptions::NonGC)
2107  return;
2109  for (auto *Prop : IDecl->properties())
2110  PM[std::make_pair(Prop->getIdentifier(), Prop->isClassProperty())] = Prop;
2111  for (const auto *Ext : IDecl->known_extensions())
2112  for (auto *Prop : Ext->properties())
2113  PM[std::make_pair(Prop->getIdentifier(), Prop->isClassProperty())] = Prop;
2114 
2115  for (ObjCContainerDecl::PropertyMap::iterator I = PM.begin(), E = PM.end();
2116  I != E; ++I) {
2117  const ObjCPropertyDecl *Property = I->second;
2118  ObjCMethodDecl *GetterMethod = nullptr;
2119  ObjCMethodDecl *SetterMethod = nullptr;
2120  bool LookedUpGetterSetter = false;
2121 
2122  unsigned Attributes = Property->getPropertyAttributes();
2123  unsigned AttributesAsWritten = Property->getPropertyAttributesAsWritten();
2124 
2125  if (!(AttributesAsWritten & ObjCPropertyDecl::OBJC_PR_atomic) &&
2126  !(AttributesAsWritten & ObjCPropertyDecl::OBJC_PR_nonatomic)) {
2127  GetterMethod = Property->isClassProperty() ?
2128  IMPDecl->getClassMethod(Property->getGetterName()) :
2129  IMPDecl->getInstanceMethod(Property->getGetterName());
2130  SetterMethod = Property->isClassProperty() ?
2131  IMPDecl->getClassMethod(Property->getSetterName()) :
2132  IMPDecl->getInstanceMethod(Property->getSetterName());
2133  LookedUpGetterSetter = true;
2134  if (GetterMethod) {
2135  Diag(GetterMethod->getLocation(),
2136  diag::warn_default_atomic_custom_getter_setter)
2137  << Property->getIdentifier() << 0;
2138  Diag(Property->getLocation(), diag::note_property_declare);
2139  }
2140  if (SetterMethod) {
2141  Diag(SetterMethod->getLocation(),
2142  diag::warn_default_atomic_custom_getter_setter)
2143  << Property->getIdentifier() << 1;
2144  Diag(Property->getLocation(), diag::note_property_declare);
2145  }
2146  }
2147 
2148  // We only care about readwrite atomic property.
2149  if ((Attributes & ObjCPropertyDecl::OBJC_PR_nonatomic) ||
2150  !(Attributes & ObjCPropertyDecl::OBJC_PR_readwrite))
2151  continue;
2152  if (const ObjCPropertyImplDecl *PIDecl = IMPDecl->FindPropertyImplDecl(
2153  Property->getIdentifier(), Property->getQueryKind())) {
2154  if (PIDecl->getPropertyImplementation() == ObjCPropertyImplDecl::Dynamic)
2155  continue;
2156  if (!LookedUpGetterSetter) {
2157  GetterMethod = Property->isClassProperty() ?
2158  IMPDecl->getClassMethod(Property->getGetterName()) :
2159  IMPDecl->getInstanceMethod(Property->getGetterName());
2160  SetterMethod = Property->isClassProperty() ?
2161  IMPDecl->getClassMethod(Property->getSetterName()) :
2162  IMPDecl->getInstanceMethod(Property->getSetterName());
2163  }
2164  if ((GetterMethod && !SetterMethod) || (!GetterMethod && SetterMethod)) {
2165  SourceLocation MethodLoc =
2166  (GetterMethod ? GetterMethod->getLocation()
2167  : SetterMethod->getLocation());
2168  Diag(MethodLoc, diag::warn_atomic_property_rule)
2169  << Property->getIdentifier() << (GetterMethod != nullptr)
2170  << (SetterMethod != nullptr);
2171  // fixit stuff.
2172  if (Property->getLParenLoc().isValid() &&
2173  !(AttributesAsWritten & ObjCPropertyDecl::OBJC_PR_atomic)) {
2174  // @property () ... case.
2175  SourceLocation AfterLParen =
2176  getLocForEndOfToken(Property->getLParenLoc());
2177  StringRef NonatomicStr = AttributesAsWritten? "nonatomic, "
2178  : "nonatomic";
2179  Diag(Property->getLocation(),
2180  diag::note_atomic_property_fixup_suggest)
2181  << FixItHint::CreateInsertion(AfterLParen, NonatomicStr);
2182  } else if (Property->getLParenLoc().isInvalid()) {
2183  //@property id etc.
2184  SourceLocation startLoc =
2185  Property->getTypeSourceInfo()->getTypeLoc().getBeginLoc();
2186  Diag(Property->getLocation(),
2187  diag::note_atomic_property_fixup_suggest)
2188  << FixItHint::CreateInsertion(startLoc, "(nonatomic) ");
2189  }
2190  else
2191  Diag(MethodLoc, diag::note_atomic_property_fixup_suggest);
2192  Diag(Property->getLocation(), diag::note_property_declare);
2193  }
2194  }
2195  }
2196 }
2197 
2199  if (getLangOpts().getGC() == LangOptions::GCOnly)
2200  return;
2201 
2202  for (const auto *PID : D->property_impls()) {
2203  const ObjCPropertyDecl *PD = PID->getPropertyDecl();
2204  if (PD && !PD->hasAttr<NSReturnsNotRetainedAttr>() &&
2205  !PD->isClassProperty() &&
2206  !D->getInstanceMethod(PD->getGetterName())) {
2207  ObjCMethodDecl *method = PD->getGetterMethodDecl();
2208  if (!method)
2209  continue;
2210  ObjCMethodFamily family = method->getMethodFamily();
2211  if (family == OMF_alloc || family == OMF_copy ||
2212  family == OMF_mutableCopy || family == OMF_new) {
2213  if (getLangOpts().ObjCAutoRefCount)
2214  Diag(PD->getLocation(), diag::err_cocoa_naming_owned_rule);
2215  else
2216  Diag(PD->getLocation(), diag::warn_cocoa_naming_owned_rule);
2217 
2218  // Look for a getter explicitly declared alongside the property.
2219  // If we find one, use its location for the note.
2220  SourceLocation noteLoc = PD->getLocation();
2221  SourceLocation fixItLoc;
2222  for (auto *getterRedecl : method->redecls()) {
2223  if (getterRedecl->isImplicit())
2224  continue;
2225  if (getterRedecl->getDeclContext() != PD->getDeclContext())
2226  continue;
2227  noteLoc = getterRedecl->getLocation();
2228  fixItLoc = getterRedecl->getLocEnd();
2229  }
2230 
2232  TokenValue tokens[] = {
2233  tok::kw___attribute, tok::l_paren, tok::l_paren,
2234  PP.getIdentifierInfo("objc_method_family"), tok::l_paren,
2235  PP.getIdentifierInfo("none"), tok::r_paren,
2236  tok::r_paren, tok::r_paren
2237  };
2238  StringRef spelling = "__attribute__((objc_method_family(none)))";
2239  StringRef macroName = PP.getLastMacroWithSpelling(noteLoc, tokens);
2240  if (!macroName.empty())
2241  spelling = macroName;
2242 
2243  auto noteDiag = Diag(noteLoc, diag::note_cocoa_naming_declare_family)
2244  << method->getDeclName() << spelling;
2245  if (fixItLoc.isValid()) {
2246  SmallString<64> fixItText(" ");
2247  fixItText += spelling;
2248  noteDiag << FixItHint::CreateInsertion(fixItLoc, fixItText);
2249  }
2250  }
2251  }
2252  }
2253 }
2254 
2256  const ObjCImplementationDecl *ImplD,
2257  const ObjCInterfaceDecl *IFD) {
2258  assert(IFD->hasDesignatedInitializers());
2259  const ObjCInterfaceDecl *SuperD = IFD->getSuperClass();
2260  if (!SuperD)
2261  return;
2262 
2263  SelectorSet InitSelSet;
2264  for (const auto *I : ImplD->instance_methods())
2265  if (I->getMethodFamily() == OMF_init)
2266  InitSelSet.insert(I->getSelector());
2267 
2269  SuperD->getDesignatedInitializers(DesignatedInits);
2271  I = DesignatedInits.begin(), E = DesignatedInits.end(); I != E; ++I) {
2272  const ObjCMethodDecl *MD = *I;
2273  if (!InitSelSet.count(MD->getSelector())) {
2274  bool Ignore = false;
2275  if (auto *IMD = IFD->getInstanceMethod(MD->getSelector())) {
2276  Ignore = IMD->isUnavailable();
2277  }
2278  if (!Ignore) {
2279  Diag(ImplD->getLocation(),
2280  diag::warn_objc_implementation_missing_designated_init_override)
2281  << MD->getSelector();
2282  Diag(MD->getLocation(), diag::note_objc_designated_init_marked_here);
2283  }
2284  }
2285  }
2286 }
2287 
2288 /// AddPropertyAttrs - Propagates attributes from a property to the
2289 /// implicitly-declared getter or setter for that property.
2290 static void AddPropertyAttrs(Sema &S, ObjCMethodDecl *PropertyMethod,
2292  // Should we just clone all attributes over?
2293  for (const auto *A : Property->attrs()) {
2294  if (isa<DeprecatedAttr>(A) ||
2295  isa<UnavailableAttr>(A) ||
2296  isa<AvailabilityAttr>(A))
2297  PropertyMethod->addAttr(A->clone(S.Context));
2298  }
2299 }
2300 
2301 /// ProcessPropertyDecl - Make sure that any user-defined setter/getter methods
2302 /// have the property type and issue diagnostics if they don't.
2303 /// Also synthesize a getter/setter method if none exist (and update the
2304 /// appropriate lookup tables.
2306  ObjCMethodDecl *GetterMethod, *SetterMethod;
2307  ObjCContainerDecl *CD = cast<ObjCContainerDecl>(property->getDeclContext());
2308  if (CD->isInvalidDecl())
2309  return;
2310 
2311  bool IsClassProperty = property->isClassProperty();
2312  GetterMethod = IsClassProperty ?
2313  CD->getClassMethod(property->getGetterName()) :
2314  CD->getInstanceMethod(property->getGetterName());
2315 
2316  // if setter or getter is not found in class extension, it might be
2317  // in the primary class.
2318  if (!GetterMethod)
2319  if (const ObjCCategoryDecl *CatDecl = dyn_cast<ObjCCategoryDecl>(CD))
2320  if (CatDecl->IsClassExtension())
2321  GetterMethod = IsClassProperty ? CatDecl->getClassInterface()->
2322  getClassMethod(property->getGetterName()) :
2323  CatDecl->getClassInterface()->
2324  getInstanceMethod(property->getGetterName());
2325 
2326  SetterMethod = IsClassProperty ?
2327  CD->getClassMethod(property->getSetterName()) :
2328  CD->getInstanceMethod(property->getSetterName());
2329  if (!SetterMethod)
2330  if (const ObjCCategoryDecl *CatDecl = dyn_cast<ObjCCategoryDecl>(CD))
2331  if (CatDecl->IsClassExtension())
2332  SetterMethod = IsClassProperty ? CatDecl->getClassInterface()->
2333  getClassMethod(property->getSetterName()) :
2334  CatDecl->getClassInterface()->
2335  getInstanceMethod(property->getSetterName());
2336  DiagnosePropertyAccessorMismatch(property, GetterMethod,
2337  property->getLocation());
2338 
2339  if (!property->isReadOnly() && SetterMethod) {
2340  if (Context.getCanonicalType(SetterMethod->getReturnType()) !=
2341  Context.VoidTy)
2342  Diag(SetterMethod->getLocation(), diag::err_setter_type_void);
2343  if (SetterMethod->param_size() != 1 ||
2345  (*SetterMethod->param_begin())->getType().getNonReferenceType(),
2346  property->getType().getNonReferenceType())) {
2347  Diag(property->getLocation(),
2348  diag::warn_accessor_property_type_mismatch)
2349  << property->getDeclName()
2350  << SetterMethod->getSelector();
2351  Diag(SetterMethod->getLocation(), diag::note_declared_at);
2352  }
2353  }
2354 
2355  // Synthesize getter/setter methods if none exist.
2356  // Find the default getter and if one not found, add one.
2357  // FIXME: The synthesized property we set here is misleading. We almost always
2358  // synthesize these methods unless the user explicitly provided prototypes
2359  // (which is odd, but allowed). Sema should be typechecking that the
2360  // declarations jive in that situation (which it is not currently).
2361  if (!GetterMethod) {
2362  // No instance/class method of same name as property getter name was found.
2363  // Declare a getter method and add it to the list of methods
2364  // for this class.
2365  SourceLocation Loc = property->getLocation();
2366 
2367  // The getter returns the declared property type with all qualifiers
2368  // removed.
2369  QualType resultTy = property->getType().getAtomicUnqualifiedType();
2370 
2371  // If the property is null_resettable, the getter returns nonnull.
2372  if (property->getPropertyAttributes() &
2374  QualType modifiedTy = resultTy;
2375  if (auto nullability = AttributedType::stripOuterNullability(modifiedTy)) {
2376  if (*nullability == NullabilityKind::Unspecified)
2378  modifiedTy, modifiedTy);
2379  }
2380  }
2381 
2382  GetterMethod = ObjCMethodDecl::Create(Context, Loc, Loc,
2383  property->getGetterName(),
2384  resultTy, nullptr, CD,
2385  !IsClassProperty, /*isVariadic=*/false,
2386  /*isPropertyAccessor=*/true,
2387  /*isImplicitlyDeclared=*/true, /*isDefined=*/false,
2388  (property->getPropertyImplementation() ==
2392  CD->addDecl(GetterMethod);
2393 
2394  AddPropertyAttrs(*this, GetterMethod, property);
2395 
2396  if (property->hasAttr<NSReturnsNotRetainedAttr>())
2397  GetterMethod->addAttr(NSReturnsNotRetainedAttr::CreateImplicit(Context,
2398  Loc));
2399 
2400  if (property->hasAttr<ObjCReturnsInnerPointerAttr>())
2401  GetterMethod->addAttr(
2402  ObjCReturnsInnerPointerAttr::CreateImplicit(Context, Loc));
2403 
2404  if (const SectionAttr *SA = property->getAttr<SectionAttr>())
2405  GetterMethod->addAttr(
2406  SectionAttr::CreateImplicit(Context, SectionAttr::GNU_section,
2407  SA->getName(), Loc));
2408 
2409  if (getLangOpts().ObjCAutoRefCount)
2410  CheckARCMethodDecl(GetterMethod);
2411  } else
2412  // A user declared getter will be synthesize when @synthesize of
2413  // the property with the same name is seen in the @implementation
2414  GetterMethod->setPropertyAccessor(true);
2415  property->setGetterMethodDecl(GetterMethod);
2416 
2417  // Skip setter if property is read-only.
2418  if (!property->isReadOnly()) {
2419  // Find the default setter and if one not found, add one.
2420  if (!SetterMethod) {
2421  // No instance/class method of same name as property setter name was
2422  // found.
2423  // Declare a setter method and add it to the list of methods
2424  // for this class.
2425  SourceLocation Loc = property->getLocation();
2426 
2427  SetterMethod =
2428  ObjCMethodDecl::Create(Context, Loc, Loc,
2429  property->getSetterName(), Context.VoidTy,
2430  nullptr, CD, !IsClassProperty,
2431  /*isVariadic=*/false,
2432  /*isPropertyAccessor=*/true,
2433  /*isImplicitlyDeclared=*/true,
2434  /*isDefined=*/false,
2435  (property->getPropertyImplementation() ==
2439 
2440  // Remove all qualifiers from the setter's parameter type.
2441  QualType paramTy =
2442  property->getType().getUnqualifiedType().getAtomicUnqualifiedType();
2443 
2444  // If the property is null_resettable, the setter accepts a
2445  // nullable value.
2446  if (property->getPropertyAttributes() &
2448  QualType modifiedTy = paramTy;
2449  if (auto nullability = AttributedType::stripOuterNullability(modifiedTy)){
2450  if (*nullability == NullabilityKind::Unspecified)
2452  modifiedTy, modifiedTy);
2453  }
2454  }
2455 
2456  // Invent the arguments for the setter. We don't bother making a
2457  // nice name for the argument.
2458  ParmVarDecl *Argument = ParmVarDecl::Create(Context, SetterMethod,
2459  Loc, Loc,
2460  property->getIdentifier(),
2461  paramTy,
2462  /*TInfo=*/nullptr,
2463  SC_None,
2464  nullptr);
2465  SetterMethod->setMethodParams(Context, Argument, None);
2466 
2467  AddPropertyAttrs(*this, SetterMethod, property);
2468 
2469  CD->addDecl(SetterMethod);
2470  if (const SectionAttr *SA = property->getAttr<SectionAttr>())
2471  SetterMethod->addAttr(
2472  SectionAttr::CreateImplicit(Context, SectionAttr::GNU_section,
2473  SA->getName(), Loc));
2474  // It's possible for the user to have set a very odd custom
2475  // setter selector that causes it to have a method family.
2476  if (getLangOpts().ObjCAutoRefCount)
2477  CheckARCMethodDecl(SetterMethod);
2478  } else
2479  // A user declared setter will be synthesize when @synthesize of
2480  // the property with the same name is seen in the @implementation
2481  SetterMethod->setPropertyAccessor(true);
2482  property->setSetterMethodDecl(SetterMethod);
2483  }
2484  // Add any synthesized methods to the global pool. This allows us to
2485  // handle the following, which is supported by GCC (and part of the design).
2486  //
2487  // @interface Foo
2488  // @property double bar;
2489  // @end
2490  //
2491  // void thisIsUnfortunate() {
2492  // id foo;
2493  // double bar = [foo bar];
2494  // }
2495  //
2496  if (!IsClassProperty) {
2497  if (GetterMethod)
2498  AddInstanceMethodToGlobalPool(GetterMethod);
2499  if (SetterMethod)
2500  AddInstanceMethodToGlobalPool(SetterMethod);
2501  } else {
2502  if (GetterMethod)
2503  AddFactoryMethodToGlobalPool(GetterMethod);
2504  if (SetterMethod)
2505  AddFactoryMethodToGlobalPool(SetterMethod);
2506  }
2507 
2508  ObjCInterfaceDecl *CurrentClass = dyn_cast<ObjCInterfaceDecl>(CD);
2509  if (!CurrentClass) {
2510  if (ObjCCategoryDecl *Cat = dyn_cast<ObjCCategoryDecl>(CD))
2511  CurrentClass = Cat->getClassInterface();
2512  else if (ObjCImplDecl *Impl = dyn_cast<ObjCImplDecl>(CD))
2513  CurrentClass = Impl->getClassInterface();
2514  }
2515  if (GetterMethod)
2516  CheckObjCMethodOverrides(GetterMethod, CurrentClass, Sema::RTC_Unknown);
2517  if (SetterMethod)
2518  CheckObjCMethodOverrides(SetterMethod, CurrentClass, Sema::RTC_Unknown);
2519 }
2520 
2522  SourceLocation Loc,
2523  unsigned &Attributes,
2524  bool propertyInPrimaryClass) {
2525  // FIXME: Improve the reported location.
2526  if (!PDecl || PDecl->isInvalidDecl())
2527  return;
2528 
2529  if ((Attributes & ObjCDeclSpec::DQ_PR_readonly) &&
2530  (Attributes & ObjCDeclSpec::DQ_PR_readwrite))
2531  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2532  << "readonly" << "readwrite";
2533 
2534  ObjCPropertyDecl *PropertyDecl = cast<ObjCPropertyDecl>(PDecl);
2535  QualType PropertyTy = PropertyDecl->getType();
2536 
2537  // Check for copy or retain on non-object types.
2538  if ((Attributes & (ObjCDeclSpec::DQ_PR_weak | ObjCDeclSpec::DQ_PR_copy |
2540  !PropertyTy->isObjCRetainableType() &&
2541  !PropertyDecl->hasAttr<ObjCNSObjectAttr>()) {
2542  Diag(Loc, diag::err_objc_property_requires_object)
2543  << (Attributes & ObjCDeclSpec::DQ_PR_weak ? "weak" :
2544  Attributes & ObjCDeclSpec::DQ_PR_copy ? "copy" : "retain (or strong)");
2547  PropertyDecl->setInvalidDecl();
2548  }
2549 
2550  // Check for more than one of { assign, copy, retain }.
2551  if (Attributes & ObjCDeclSpec::DQ_PR_assign) {
2552  if (Attributes & ObjCDeclSpec::DQ_PR_copy) {
2553  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2554  << "assign" << "copy";
2555  Attributes &= ~ObjCDeclSpec::DQ_PR_copy;
2556  }
2557  if (Attributes & ObjCDeclSpec::DQ_PR_retain) {
2558  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2559  << "assign" << "retain";
2560  Attributes &= ~ObjCDeclSpec::DQ_PR_retain;
2561  }
2562  if (Attributes & ObjCDeclSpec::DQ_PR_strong) {
2563  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2564  << "assign" << "strong";
2565  Attributes &= ~ObjCDeclSpec::DQ_PR_strong;
2566  }
2567  if (getLangOpts().ObjCAutoRefCount &&
2568  (Attributes & ObjCDeclSpec::DQ_PR_weak)) {
2569  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2570  << "assign" << "weak";
2571  Attributes &= ~ObjCDeclSpec::DQ_PR_weak;
2572  }
2573  if (PropertyDecl->hasAttr<IBOutletCollectionAttr>())
2574  Diag(Loc, diag::warn_iboutletcollection_property_assign);
2575  } else if (Attributes & ObjCDeclSpec::DQ_PR_unsafe_unretained) {
2576  if (Attributes & ObjCDeclSpec::DQ_PR_copy) {
2577  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2578  << "unsafe_unretained" << "copy";
2579  Attributes &= ~ObjCDeclSpec::DQ_PR_copy;
2580  }
2581  if (Attributes & ObjCDeclSpec::DQ_PR_retain) {
2582  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2583  << "unsafe_unretained" << "retain";
2584  Attributes &= ~ObjCDeclSpec::DQ_PR_retain;
2585  }
2586  if (Attributes & ObjCDeclSpec::DQ_PR_strong) {
2587  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2588  << "unsafe_unretained" << "strong";
2589  Attributes &= ~ObjCDeclSpec::DQ_PR_strong;
2590  }
2591  if (getLangOpts().ObjCAutoRefCount &&
2592  (Attributes & ObjCDeclSpec::DQ_PR_weak)) {
2593  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2594  << "unsafe_unretained" << "weak";
2595  Attributes &= ~ObjCDeclSpec::DQ_PR_weak;
2596  }
2597  } else if (Attributes & ObjCDeclSpec::DQ_PR_copy) {
2598  if (Attributes & ObjCDeclSpec::DQ_PR_retain) {
2599  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2600  << "copy" << "retain";
2601  Attributes &= ~ObjCDeclSpec::DQ_PR_retain;
2602  }
2603  if (Attributes & ObjCDeclSpec::DQ_PR_strong) {
2604  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2605  << "copy" << "strong";
2606  Attributes &= ~ObjCDeclSpec::DQ_PR_strong;
2607  }
2608  if (Attributes & ObjCDeclSpec::DQ_PR_weak) {
2609  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2610  << "copy" << "weak";
2611  Attributes &= ~ObjCDeclSpec::DQ_PR_weak;
2612  }
2613  }
2614  else if ((Attributes & ObjCDeclSpec::DQ_PR_retain) &&
2615  (Attributes & ObjCDeclSpec::DQ_PR_weak)) {
2616  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2617  << "retain" << "weak";
2618  Attributes &= ~ObjCDeclSpec::DQ_PR_retain;
2619  }
2620  else if ((Attributes & ObjCDeclSpec::DQ_PR_strong) &&
2621  (Attributes & ObjCDeclSpec::DQ_PR_weak)) {
2622  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2623  << "strong" << "weak";
2624  Attributes &= ~ObjCDeclSpec::DQ_PR_weak;
2625  }
2626 
2627  if (Attributes & ObjCDeclSpec::DQ_PR_weak) {
2628  // 'weak' and 'nonnull' are mutually exclusive.
2629  if (auto nullability = PropertyTy->getNullability(Context)) {
2630  if (*nullability == NullabilityKind::NonNull)
2631  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2632  << "nonnull" << "weak";
2633  }
2634  }
2635 
2636  if ((Attributes & ObjCDeclSpec::DQ_PR_atomic) &&
2637  (Attributes & ObjCDeclSpec::DQ_PR_nonatomic)) {
2638  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2639  << "atomic" << "nonatomic";
2640  Attributes &= ~ObjCDeclSpec::DQ_PR_atomic;
2641  }
2642 
2643  // Warn if user supplied no assignment attribute, property is
2644  // readwrite, and this is an object type.
2645  if (!getOwnershipRule(Attributes) && PropertyTy->isObjCRetainableType()) {
2646  if (Attributes & ObjCDeclSpec::DQ_PR_readonly) {
2647  // do nothing
2648  } else if (getLangOpts().ObjCAutoRefCount) {
2649  // With arc, @property definitions should default to strong when
2650  // not specified.
2652  } else if (PropertyTy->isObjCObjectPointerType()) {
2653  bool isAnyClassTy =
2654  (PropertyTy->isObjCClassType() ||
2655  PropertyTy->isObjCQualifiedClassType());
2656  // In non-gc, non-arc mode, 'Class' is treated as a 'void *' no need to
2657  // issue any warning.
2658  if (isAnyClassTy && getLangOpts().getGC() == LangOptions::NonGC)
2659  ;
2660  else if (propertyInPrimaryClass) {
2661  // Don't issue warning on property with no life time in class
2662  // extension as it is inherited from property in primary class.
2663  // Skip this warning in gc-only mode.
2664  if (getLangOpts().getGC() != LangOptions::GCOnly)
2665  Diag(Loc, diag::warn_objc_property_no_assignment_attribute);
2666 
2667  // If non-gc code warn that this is likely inappropriate.
2668  if (getLangOpts().getGC() == LangOptions::NonGC)
2669  Diag(Loc, diag::warn_objc_property_default_assign_on_object);
2670  }
2671  }
2672 
2673  // FIXME: Implement warning dependent on NSCopying being
2674  // implemented. See also:
2675  // <rdar://5168496&4855821&5607453&5096644&4947311&5698469&4947014&5168496>
2676  // (please trim this list while you are at it).
2677  }
2678 
2679  if (!(Attributes & ObjCDeclSpec::DQ_PR_copy)
2680  &&!(Attributes & ObjCDeclSpec::DQ_PR_readonly)
2681  && getLangOpts().getGC() == LangOptions::GCOnly
2682  && PropertyTy->isBlockPointerType())
2683  Diag(Loc, diag::warn_objc_property_copy_missing_on_block);
2684  else if ((Attributes & ObjCDeclSpec::DQ_PR_retain) &&
2685  !(Attributes & ObjCDeclSpec::DQ_PR_readonly) &&
2686  !(Attributes & ObjCDeclSpec::DQ_PR_strong) &&
2687  PropertyTy->isBlockPointerType())
2688  Diag(Loc, diag::warn_objc_property_retain_of_block);
2689 
2690  if ((Attributes & ObjCDeclSpec::DQ_PR_readonly) &&
2691  (Attributes & ObjCDeclSpec::DQ_PR_setter))
2692  Diag(Loc, diag::warn_objc_readonly_property_has_setter);
2693 }
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)
An instance of this class is created to represent a function declaration or definition.
Definition: Decl.h:1697
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:653
ObjCInterfaceDecl * getClassInterface()
Definition: DeclObjC.h:2344
all_protocol_range all_referenced_protocols() const
Definition: DeclObjC.h:1443
ObjCInterfaceDecl * getClassInterface()
Definition: DeclObjC.cpp:1101
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:1908
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:11490
void setObjCLifetime(ObjCLifetime type)
Definition: Type.h:344
static void CollectSuperClassPropertyImplementations(ObjCInterfaceDecl *CDecl, ObjCInterfaceDecl::PropertyMap &PropMap)
CollectSuperClassPropertyImplementations - This routine collects list of properties to be implemented...
bool isRecordType() const
Definition: Type.h:6017
llvm::SmallVector< ObjCPropertyDecl *, 8 > PropertyDeclOrder
Definition: DeclObjC.h:1125
QualType getQualifiedType(SplitQualType split) const
Un-split a SplitQualType.
Definition: ASTContext.h:1880
SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID)
Emit a diagnostic.
Definition: Sema.h:1270
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:765
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:5893
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:2187
void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false)
AddFactoryMethodToGlobalPool - Same as above, but for factory methods.
Definition: Sema.h:3585
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:45
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:739
const T * getAs() const
Member-template getAs<specific type>&#39;.
Definition: Type.h:6307
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:1667
bool isInvalidDecl() const
Definition: DeclBase.h:546
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
ParmVarDecl - Represents a parameter to a function.
Definition: Decl.h:1513
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:152
IdentifierInfo * getIdentifier() const
getIdentifier - Get the identifier that names this declaration, if there is one.
Definition: Decl.h:265
static void CollectImmediateProperties(ObjCContainerDecl *CDecl, ObjCContainerDecl::PropertyMap &PropMap, ObjCContainerDecl::PropertyMap &SuperPropMap, bool CollectClassPropsOnly=false, bool IncludeProtocols=true)
CollectImmediateProperties - This routine collects all properties in the class and its conforming pro...
DeclarationName getDeclName() const
getDeclName - Get the actual, stored name of the declaration, which may be a special name...
Definition: Decl.h:291
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:859
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:149
The results of name lookup within a DeclContext.
Definition: DeclBase.h:1178
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:1348
IdentifierTable & Idents
Definition: ASTContext.h:537
This little struct is used to capture information about structure field declarators, which is basically just a bitfield size.
Definition: DeclSpec.h:2450
An r-value expression (a pr-value in the C++11 taxonomy) produces a temporary value.
Definition: Specifiers.h:107
bool isClassProperty() const
Definition: DeclObjC.h:896
ObjCMethodFamily getMethodFamily() const
Determines the family of this method.
Definition: DeclObjC.cpp:943
void collectPropertiesToImplement(PropertyMap &PM, PropertyDeclOrder &PO) const override
This routine collects list of properties to be implemented in the class.
Definition: DeclObjC.cpp:385
void setObjCWeakProperty(bool Val=true)
Definition: DeclSpec.h:2400
bool isNonFragile() const
Does this runtime follow the set of implied behaviors for a "non-fragile" ABI?
Definition: ObjCRuntime.h:80
ObjCContainerDecl - Represents a container for method declarations.
Definition: DeclObjC.h: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:2215
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:7506
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:415
void MarkDeclRefReferenced(DeclRefExpr *E, const Expr *Base=nullptr)
Perform reference-marking and odr-use handling for a DeclRefExpr.
Definition: SemaExpr.cpp:14988
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:39
bool declaresSameEntity(const Decl *D1, const Decl *D2)
Determine whether two declarations declare the same entity.
Definition: DeclBase.h:1149
Represents an Objective-C protocol declaration.
Definition: DeclObjC.h:2083
Preprocessor & PP
Definition: Sema.h:315
const LangOptions & getLangOpts() const
Definition: Sema.h:1193
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:2101
const LangOptions & LangOpts
Definition: Sema.h:314
This object can be modified without requiring retains or releases.
Definition: Type.h:173
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:3580
lookup_result lookup(DeclarationName Name) const
lookup - Find the declarations (if any) with the given Name in this context.
Definition: DeclBase.cpp:1521
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:535
Sema - This implements semantic analysis and AST building for C.
Definition: Sema.h:274
static void AddPropertyAttrs(Sema &S, ObjCMethodDecl *PropertyMethod, ObjCPropertyDecl *Property)
AddPropertyAttrs - Propagates attributes from a property to the implicitly-declared getter or setter ...
bool isFragile() const
The inverse of isNonFragile(): does this runtime follow the set of implied behaviors for a "fragile" ...
Definition: ObjCRuntime.h:95
llvm::SmallPtrSet< Selector, 8 > SelectorSet
Definition: Sema.h:3398
static ImplicitCastExpr * Create(const ASTContext &Context, QualType T, CastKind Kind, Expr *Operand, const CXXCastPath *BasePath, ExprValueKind Cat)
Definition: Expr.cpp:1718
void addObjCLifetime(ObjCLifetime type)
Definition: Type.h:348
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:1778
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:1067
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
const FunctionProtoType * T
bool isObjCARCImplicitlyUnretainedType() const
Determines if this type, which must satisfy isObjCLifetimeType(), is implicitly __unsafe_unretained r...
Definition: Type.cpp:3785
TypeSourceInfo * getTypeSourceInfo() const
Definition: DeclObjC.h:844
bool isObjCRetainableType() const
Definition: Type.cpp:3824
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:425
ObjCInterfaceDecl * getSuperClass() const
Definition: DeclObjC.cpp:330
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:361
bool RequireCompleteType(SourceLocation Loc, QualType T, TypeDiagnoser &Diagnoser)
Ensure that the type T is a complete type.
Definition: SemaType.cpp:7364
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:592
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:3735
ObjCIvarDecl * lookupInstanceVariable(IdentifierInfo *IVarName, ObjCInterfaceDecl *&ClassDeclared)
Definition: DeclObjC.cpp:613
clang::ObjCRuntime ObjCRuntime
Definition: LangOptions.h:117
propimpl_range property_impls() const
Definition: DeclObjC.h:2486
Qualifiers Quals
The local qualifiers.
Definition: Type.h:597
llvm::SmallDenseSet< const ObjCProtocolDecl *, 8 > ProtocolPropertySet
Definition: DeclObjC.h:1124
bool isInvalid() const
Definition: Ownership.h:158
bool isInstanceMethod() const
Definition: DeclObjC.h:452
Preprocessor & getPreprocessor() const
Definition: Sema.h:1199
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:1337
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:5728
RecordDecl * getDecl() const
Definition: Type.h:3988
void addAttr(Attr *A)
Definition: DeclBase.h:484
SourceLocation getLocStart() const LLVM_READONLY
Definition: DeclBase.h:408
There is no lifetime qualification on this type.
Definition: Type.h:169
void makeDeclVisibleInContext(NamedDecl *D)
Makes a declaration visible within this context.
Definition: DeclBase.cpp:1693
Assigning into this object requires the old value to be released and the new value to be retained...
Definition: Type.h:180
Kind
ActionResult - This structure is used while parsing/acting on expressions, stmts, etc...
Definition: Ownership.h:144
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
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:819
ObjCCategoryDecl - Represents a category declaration.
Definition: DeclObjC.h:2299
CanQualType VoidTy
Definition: ASTContext.h:996
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:2065
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:186
bool hasFlexibleArrayMember() const
Definition: Decl.h:3531
bool hasSameUnqualifiedType(QualType T1, QualType T2) const
Determine whether the given types are equivalent after cvr-qualifiers have been removed.
Definition: ASTContext.h:2214
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:1062
bool propertyTypesAreCompatible(QualType, QualType)
ExprResult PerformCopyInitialization(const InitializedEntity &Entity, SourceLocation EqualLoc, ExprResult Init, bool TopLevelOfInitList=false, bool AllowExplicit=false)
Definition: SemaInit.cpp:8377
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:936
static ParmVarDecl * Create(ASTContext &C, DeclContext *DC, SourceLocation StartLoc, SourceLocation IdLoc, IdentifierInfo *Id, QualType T, TypeSourceInfo *TInfo, StorageClass S, Expr *DefArg)
Definition: Decl.cpp:2451
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.
DeclContext - This is used only as base class of specific decl types that can act as declaration cont...
Definition: DeclBase.h:1252
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:25
SourceLocation getLocStart() const LLVM_READONLY
Definition: TypeLoc.h:154
attr_range attrs() const
Definition: DeclBase.h:494
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:340
bool hasDesignatedInitializers() const
Returns true if this interface decl contains at least one initializer marked with the &#39;objc_designate...
Definition: DeclObjC.cpp:1486
bool isMacroID() const
Represents a pointer to an Objective C object.
Definition: Type.h:5442
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:1712
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:3978
void overwritePropertyAttributes(unsigned PRVal)
Definition: DeclObjC.h:865
AvailabilityResult getAvailability(std::string *Message=nullptr, VersionTuple EnclosingVersion=VersionTuple()) const
Determine the availability of the given declaration.
Definition: DeclBase.cpp:581
T * getAttr() const
Definition: DeclBase.h:531
SourceLocation getGetterNameLoc() const
Definition: DeclSpec.h:851
bool hasSameType(QualType T1, QualType T2) const
Determine whether the given types T1 and T2 are equivalent.
Definition: ASTContext.h:2190
static FixItHint CreateInsertion(SourceLocation InsertionLoc, StringRef Code, bool BeforePreviousInsertions=false)
Create a code modification hint that inserts the given code string at a specific location.
Definition: Diagnostic.h:90
void addDecl(Decl *D)
Add the declaration D into this context.
Definition: DeclBase.cpp:1410
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:675
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:643
bool isObjCObjectType() const
Definition: Type.h:6045
bool IsClassExtension() const
Definition: DeclObjC.h:2409
SourceLocation getIdentifierLoc() const
Definition: DeclSpec.h:2107
CanQualType getCanonicalType(QualType T) const
Return the canonical (structural) type corresponding to the specified potentially non-canonical type ...
Definition: ASTContext.h:2174
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:183
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:9347
ObjCPropertyImplDecl * FindPropertyImplDecl(IdentifierInfo *propertyId, ObjCPropertyQueryKind queryKind) const
FindPropertyImplDecl - This method looks up a previous ObjCPropertyImplDecl added to the list of thos...
Definition: DeclObjC.cpp:2077
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:328
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:127
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
getName - Get the name of identifier for this declaration as a StringRef.
Definition: Decl.h:270
bool isArcWeakrefUnavailable() const
isArcWeakrefUnavailable - Checks for a class or one of its super classes to be incompatible with __we...
Definition: DeclObjC.cpp:405
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:956
void addPropertyImplementation(ObjCPropertyImplDecl *property)
Definition: DeclObjC.cpp:2038
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:638
#define true
Definition: stdbool.h:32
An l-value expression is a reference to an object with independent storage.
Definition: Specifiers.h:111
A trivial tuple used to represent a source range.
ASTContext & Context
Definition: Sema.h:316
void setLexicalDeclContext(DeclContext *DC)
Definition: DeclBase.cpp:288
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:12057
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:639
const LangOptions & getLangOpts() const
Definition: ASTContext.h:688
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:416
TypeSourceInfo * GetTypeForDeclarator(Declarator &D, Scope *S)
GetTypeForDeclarator - Convert the type for the specified declarator to Type instances.
Definition: SemaType.cpp:4949
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:672
static bool isIncompatiblePropertyAttribute(unsigned Attr1, unsigned Attr2, ObjCPropertyDecl::PropertyAttributeKind Kind)
Qualifiers::ObjCLifetime getObjCLifetime() const
Returns lifetime attribute of this type.
Definition: Type.h:1072
ObjCCategoryDecl * FindCategoryDeclaration(IdentifierInfo *CategoryId) const
FindCategoryDeclaration - Finds category declaration in the list of categories for this class and ret...
Definition: DeclObjC.cpp:1628