clang  5.0.0svn
SemaObjCProperty.cpp
Go to the documentation of this file.
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, GetterSel, SetterSel,
204  isReadWrite,
205  Attributes,
206  ODS.getPropertyAttributes(),
207  T, TSI, MethodImplKind);
208  if (!Res)
209  return nullptr;
210  }
211  }
212 
213  if (!Res) {
214  Res = CreatePropertyDecl(S, ClassDecl, AtLoc, LParenLoc, FD,
215  GetterSel, SetterSel, isReadWrite,
216  Attributes, ODS.getPropertyAttributes(),
217  T, TSI, MethodImplKind);
218  if (lexicalDC)
219  Res->setLexicalDeclContext(lexicalDC);
220  }
221 
222  // Validate the attributes on the @property.
223  CheckObjCPropertyAttributes(Res, AtLoc, Attributes,
224  (isa<ObjCInterfaceDecl>(ClassDecl) ||
225  isa<ObjCProtocolDecl>(ClassDecl)));
226 
227  // Check consistency if the type has explicit ownership qualification.
228  if (Res->getType().getObjCLifetime())
229  checkPropertyDeclWithOwnership(*this, Res);
230 
231  llvm::SmallPtrSet<ObjCProtocolDecl *, 16> KnownProtos;
232  if (ObjCInterfaceDecl *IFace = dyn_cast<ObjCInterfaceDecl>(ClassDecl)) {
233  // For a class, compare the property against a property in our superclass.
234  bool FoundInSuper = false;
235  ObjCInterfaceDecl *CurrentInterfaceDecl = IFace;
236  while (ObjCInterfaceDecl *Super = CurrentInterfaceDecl->getSuperClass()) {
237  DeclContext::lookup_result R = Super->lookup(Res->getDeclName());
238  for (unsigned I = 0, N = R.size(); I != N; ++I) {
239  if (ObjCPropertyDecl *SuperProp = dyn_cast<ObjCPropertyDecl>(R[I])) {
240  DiagnosePropertyMismatch(Res, SuperProp, Super->getIdentifier(), false);
241  FoundInSuper = true;
242  break;
243  }
244  }
245  if (FoundInSuper)
246  break;
247  else
248  CurrentInterfaceDecl = Super;
249  }
250 
251  if (FoundInSuper) {
252  // Also compare the property against a property in our protocols.
253  for (auto *P : CurrentInterfaceDecl->protocols()) {
254  CheckPropertyAgainstProtocol(*this, Res, P, KnownProtos);
255  }
256  } else {
257  // Slower path: look in all protocols we referenced.
258  for (auto *P : IFace->all_referenced_protocols()) {
259  CheckPropertyAgainstProtocol(*this, Res, P, KnownProtos);
260  }
261  }
262  } else if (ObjCCategoryDecl *Cat = dyn_cast<ObjCCategoryDecl>(ClassDecl)) {
263  // We don't check if class extension. Because properties in class extension
264  // are meant to override some of the attributes and checking has already done
265  // when property in class extension is constructed.
266  if (!Cat->IsClassExtension())
267  for (auto *P : Cat->protocols())
268  CheckPropertyAgainstProtocol(*this, Res, P, KnownProtos);
269  } else {
270  ObjCProtocolDecl *Proto = cast<ObjCProtocolDecl>(ClassDecl);
271  for (auto *P : Proto->protocols())
272  CheckPropertyAgainstProtocol(*this, Res, P, KnownProtos);
273  }
274 
276  return Res;
277 }
278 
280 makePropertyAttributesAsWritten(unsigned Attributes) {
281  unsigned attributesAsWritten = 0;
282  if (Attributes & ObjCDeclSpec::DQ_PR_readonly)
283  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_readonly;
284  if (Attributes & ObjCDeclSpec::DQ_PR_readwrite)
285  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_readwrite;
286  if (Attributes & ObjCDeclSpec::DQ_PR_getter)
287  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_getter;
288  if (Attributes & ObjCDeclSpec::DQ_PR_setter)
289  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_setter;
290  if (Attributes & ObjCDeclSpec::DQ_PR_assign)
291  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_assign;
292  if (Attributes & ObjCDeclSpec::DQ_PR_retain)
293  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_retain;
294  if (Attributes & ObjCDeclSpec::DQ_PR_strong)
295  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_strong;
296  if (Attributes & ObjCDeclSpec::DQ_PR_weak)
297  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_weak;
298  if (Attributes & ObjCDeclSpec::DQ_PR_copy)
299  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_copy;
300  if (Attributes & ObjCDeclSpec::DQ_PR_unsafe_unretained)
301  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_unsafe_unretained;
302  if (Attributes & ObjCDeclSpec::DQ_PR_nonatomic)
303  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_nonatomic;
304  if (Attributes & ObjCDeclSpec::DQ_PR_atomic)
305  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_atomic;
306  if (Attributes & ObjCDeclSpec::DQ_PR_class)
307  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_class;
308 
309  return (ObjCPropertyDecl::PropertyAttributeKind)attributesAsWritten;
310 }
311 
312 static bool LocPropertyAttribute( ASTContext &Context, const char *attrName,
313  SourceLocation LParenLoc, SourceLocation &Loc) {
314  if (LParenLoc.isMacroID())
315  return false;
316 
317  SourceManager &SM = Context.getSourceManager();
318  std::pair<FileID, unsigned> locInfo = SM.getDecomposedLoc(LParenLoc);
319  // Try to load the file buffer.
320  bool invalidTemp = false;
321  StringRef file = SM.getBufferData(locInfo.first, &invalidTemp);
322  if (invalidTemp)
323  return false;
324  const char *tokenBegin = file.data() + locInfo.second;
325 
326  // Lex from the start of the given location.
327  Lexer lexer(SM.getLocForStartOfFile(locInfo.first),
328  Context.getLangOpts(),
329  file.begin(), tokenBegin, file.end());
330  Token Tok;
331  do {
332  lexer.LexFromRawLexer(Tok);
333  if (Tok.is(tok::raw_identifier) && Tok.getRawIdentifier() == attrName) {
334  Loc = Tok.getLocation();
335  return true;
336  }
337  } while (Tok.isNot(tok::r_paren));
338  return false;
339 }
340 
341 /// Check for a mismatch in the atomicity of the given properties.
343  ObjCPropertyDecl *OldProperty,
344  ObjCPropertyDecl *NewProperty,
345  bool PropagateAtomicity) {
346  // If the atomicity of both matches, we're done.
347  bool OldIsAtomic =
349  == 0;
350  bool NewIsAtomic =
352  == 0;
353  if (OldIsAtomic == NewIsAtomic) return;
354 
355  // Determine whether the given property is readonly and implicitly
356  // atomic.
357  auto isImplicitlyReadonlyAtomic = [](ObjCPropertyDecl *Property) -> bool {
358  // Is it readonly?
359  auto Attrs = Property->getPropertyAttributes();
360  if ((Attrs & ObjCPropertyDecl::OBJC_PR_readonly) == 0) return false;
361 
362  // Is it nonatomic?
363  if (Attrs & ObjCPropertyDecl::OBJC_PR_nonatomic) return false;
364 
365  // Was 'atomic' specified directly?
366  if (Property->getPropertyAttributesAsWritten() &
368  return false;
369 
370  return true;
371  };
372 
373  // If we're allowed to propagate atomicity, and the new property did
374  // not specify atomicity at all, propagate.
375  const unsigned AtomicityMask =
377  if (PropagateAtomicity &&
378  ((NewProperty->getPropertyAttributesAsWritten() & AtomicityMask) == 0)) {
379  unsigned Attrs = NewProperty->getPropertyAttributes();
380  Attrs = Attrs & ~AtomicityMask;
381  if (OldIsAtomic)
383  else
385 
386  NewProperty->overwritePropertyAttributes(Attrs);
387  return;
388  }
389 
390  // One of the properties is atomic; if it's a readonly property, and
391  // 'atomic' wasn't explicitly specified, we're okay.
392  if ((OldIsAtomic && isImplicitlyReadonlyAtomic(OldProperty)) ||
393  (NewIsAtomic && isImplicitlyReadonlyAtomic(NewProperty)))
394  return;
395 
396  // Diagnose the conflict.
397  const IdentifierInfo *OldContextName;
398  auto *OldDC = OldProperty->getDeclContext();
399  if (auto Category = dyn_cast<ObjCCategoryDecl>(OldDC))
400  OldContextName = Category->getClassInterface()->getIdentifier();
401  else
402  OldContextName = cast<ObjCContainerDecl>(OldDC)->getIdentifier();
403 
404  S.Diag(NewProperty->getLocation(), diag::warn_property_attribute)
405  << NewProperty->getDeclName() << "atomic"
406  << OldContextName;
407  S.Diag(OldProperty->getLocation(), diag::note_property_declare);
408 }
409 
412  SourceLocation AtLoc,
413  SourceLocation LParenLoc,
414  FieldDeclarator &FD,
415  Selector GetterSel, Selector SetterSel,
416  const bool isReadWrite,
417  unsigned &Attributes,
418  const unsigned AttributesAsWritten,
419  QualType T,
420  TypeSourceInfo *TSI,
421  tok::ObjCKeywordKind MethodImplKind) {
422  ObjCCategoryDecl *CDecl = cast<ObjCCategoryDecl>(CurContext);
423  // Diagnose if this property is already in continuation class.
424  DeclContext *DC = CurContext;
425  IdentifierInfo *PropertyId = FD.D.getIdentifier();
426  ObjCInterfaceDecl *CCPrimary = CDecl->getClassInterface();
427 
428  // We need to look in the @interface to see if the @property was
429  // already declared.
430  if (!CCPrimary) {
431  Diag(CDecl->getLocation(), diag::err_continuation_class);
432  return nullptr;
433  }
434 
435  bool isClassProperty = (AttributesAsWritten & ObjCDeclSpec::DQ_PR_class) ||
436  (Attributes & ObjCDeclSpec::DQ_PR_class);
437 
438  // Find the property in the extended class's primary class or
439  // extensions.
441  PropertyId, ObjCPropertyDecl::getQueryKind(isClassProperty));
442 
443  // If we found a property in an extension, complain.
444  if (PIDecl && isa<ObjCCategoryDecl>(PIDecl->getDeclContext())) {
445  Diag(AtLoc, diag::err_duplicate_property);
446  Diag(PIDecl->getLocation(), diag::note_property_declare);
447  return nullptr;
448  }
449 
450  // Check for consistency with the previous declaration, if there is one.
451  if (PIDecl) {
452  // A readonly property declared in the primary class can be refined
453  // by adding a readwrite property within an extension.
454  // Anything else is an error.
455  if (!(PIDecl->isReadOnly() && isReadWrite)) {
456  // Tailor the diagnostics for the common case where a readwrite
457  // property is declared both in the @interface and the continuation.
458  // This is a common error where the user often intended the original
459  // declaration to be readonly.
460  unsigned diag =
461  (Attributes & ObjCDeclSpec::DQ_PR_readwrite) &&
462  (PIDecl->getPropertyAttributesAsWritten() &
464  ? diag::err_use_continuation_class_redeclaration_readwrite
465  : diag::err_use_continuation_class;
466  Diag(AtLoc, diag)
467  << CCPrimary->getDeclName();
468  Diag(PIDecl->getLocation(), diag::note_property_declare);
469  return nullptr;
470  }
471 
472  // Check for consistency of getters.
473  if (PIDecl->getGetterName() != GetterSel) {
474  // If the getter was written explicitly, complain.
475  if (AttributesAsWritten & ObjCDeclSpec::DQ_PR_getter) {
476  Diag(AtLoc, diag::warn_property_redecl_getter_mismatch)
477  << PIDecl->getGetterName() << GetterSel;
478  Diag(PIDecl->getLocation(), diag::note_property_declare);
479  }
480 
481  // Always adopt the getter from the original declaration.
482  GetterSel = PIDecl->getGetterName();
483  Attributes |= ObjCDeclSpec::DQ_PR_getter;
484  }
485 
486  // Check consistency of ownership.
487  unsigned ExistingOwnership
489  unsigned NewOwnership = getOwnershipRule(Attributes);
490  if (ExistingOwnership && NewOwnership != ExistingOwnership) {
491  // If the ownership was written explicitly, complain.
492  if (getOwnershipRule(AttributesAsWritten)) {
493  Diag(AtLoc, diag::warn_property_attr_mismatch);
494  Diag(PIDecl->getLocation(), diag::note_property_declare);
495  }
496 
497  // Take the ownership from the original property.
498  Attributes = (Attributes & ~OwnershipMask) | ExistingOwnership;
499  }
500 
501  // If the redeclaration is 'weak' but the original property is not,
502  if ((Attributes & ObjCPropertyDecl::OBJC_PR_weak) &&
505  PIDecl->getType()->getAs<ObjCObjectPointerType>() &&
507  Diag(AtLoc, diag::warn_property_implicitly_mismatched);
508  Diag(PIDecl->getLocation(), diag::note_property_declare);
509  }
510  }
511 
512  // Create a new ObjCPropertyDecl with the DeclContext being
513  // the class extension.
514  ObjCPropertyDecl *PDecl = CreatePropertyDecl(S, CDecl, AtLoc, LParenLoc,
515  FD, GetterSel, SetterSel,
516  isReadWrite,
517  Attributes, AttributesAsWritten,
518  T, TSI, MethodImplKind, DC);
519 
520  // If there was no declaration of a property with the same name in
521  // the primary class, we're done.
522  if (!PIDecl) {
523  ProcessPropertyDecl(PDecl);
524  return PDecl;
525  }
526 
527  if (!Context.hasSameType(PIDecl->getType(), PDecl->getType())) {
528  bool IncompatibleObjC = false;
529  QualType ConvertedType;
530  // Relax the strict type matching for property type in continuation class.
531  // Allow property object type of continuation class to be different as long
532  // as it narrows the object type in its primary class property. Note that
533  // this conversion is safe only because the wider type is for a 'readonly'
534  // property in primary class and 'narrowed' type for a 'readwrite' property
535  // in continuation class.
536  QualType PrimaryClassPropertyT = Context.getCanonicalType(PIDecl->getType());
537  QualType ClassExtPropertyT = Context.getCanonicalType(PDecl->getType());
538  if (!isa<ObjCObjectPointerType>(PrimaryClassPropertyT) ||
539  !isa<ObjCObjectPointerType>(ClassExtPropertyT) ||
540  (!isObjCPointerConversion(ClassExtPropertyT, PrimaryClassPropertyT,
541  ConvertedType, IncompatibleObjC))
542  || IncompatibleObjC) {
543  Diag(AtLoc,
544  diag::err_type_mismatch_continuation_class) << PDecl->getType();
545  Diag(PIDecl->getLocation(), diag::note_property_declare);
546  return nullptr;
547  }
548  }
549 
550  // Check that atomicity of property in class extension matches the previous
551  // declaration.
552  checkAtomicPropertyMismatch(*this, PIDecl, PDecl, true);
553 
554  // Make sure getter/setter are appropriately synthesized.
555  ProcessPropertyDecl(PDecl);
556  return PDecl;
557 }
558 
560  ObjCContainerDecl *CDecl,
561  SourceLocation AtLoc,
562  SourceLocation LParenLoc,
563  FieldDeclarator &FD,
564  Selector GetterSel,
565  Selector SetterSel,
566  const bool isReadWrite,
567  const unsigned Attributes,
568  const unsigned AttributesAsWritten,
569  QualType T,
570  TypeSourceInfo *TInfo,
571  tok::ObjCKeywordKind MethodImplKind,
572  DeclContext *lexicalDC){
573  IdentifierInfo *PropertyId = FD.D.getIdentifier();
574 
575  // Property defaults to 'assign' if it is readwrite, unless this is ARC
576  // and the type is retainable.
577  bool isAssign;
578  if (Attributes & (ObjCDeclSpec::DQ_PR_assign |
580  isAssign = true;
581  } else if (getOwnershipRule(Attributes) || !isReadWrite) {
582  isAssign = false;
583  } else {
584  isAssign = (!getLangOpts().ObjCAutoRefCount ||
585  !T->isObjCRetainableType());
586  }
587 
588  // Issue a warning if property is 'assign' as default and its
589  // object, which is gc'able conforms to NSCopying protocol
590  if (getLangOpts().getGC() != LangOptions::NonGC &&
591  isAssign && !(Attributes & ObjCDeclSpec::DQ_PR_assign)) {
592  if (const ObjCObjectPointerType *ObjPtrTy =
594  ObjCInterfaceDecl *IDecl = ObjPtrTy->getObjectType()->getInterface();
595  if (IDecl)
596  if (ObjCProtocolDecl* PNSCopying =
597  LookupProtocol(&Context.Idents.get("NSCopying"), AtLoc))
598  if (IDecl->ClassImplementsProtocol(PNSCopying, true))
599  Diag(AtLoc, diag::warn_implements_nscopying) << PropertyId;
600  }
601  }
602 
603  if (T->isObjCObjectType()) {
604  SourceLocation StarLoc = TInfo->getTypeLoc().getLocEnd();
605  StarLoc = getLocForEndOfToken(StarLoc);
606  Diag(FD.D.getIdentifierLoc(), diag::err_statically_allocated_object)
607  << FixItHint::CreateInsertion(StarLoc, "*");
609  SourceLocation TLoc = TInfo->getTypeLoc().getLocStart();
610  TInfo = Context.getTrivialTypeSourceInfo(T, TLoc);
611  }
612 
613  DeclContext *DC = cast<DeclContext>(CDecl);
615  FD.D.getIdentifierLoc(),
616  PropertyId, AtLoc,
617  LParenLoc, T, TInfo);
618 
619  bool isClassProperty = (AttributesAsWritten & ObjCDeclSpec::DQ_PR_class) ||
620  (Attributes & ObjCDeclSpec::DQ_PR_class);
621  // Class property and instance property can have the same name.
623  DC, PropertyId, ObjCPropertyDecl::getQueryKind(isClassProperty))) {
624  Diag(PDecl->getLocation(), diag::err_duplicate_property);
625  Diag(prevDecl->getLocation(), diag::note_property_declare);
626  PDecl->setInvalidDecl();
627  }
628  else {
629  DC->addDecl(PDecl);
630  if (lexicalDC)
631  PDecl->setLexicalDeclContext(lexicalDC);
632  }
633 
634  if (T->isArrayType() || T->isFunctionType()) {
635  Diag(AtLoc, diag::err_property_type) << T;
636  PDecl->setInvalidDecl();
637  }
638 
639  ProcessDeclAttributes(S, PDecl, FD.D);
640 
641  // Regardless of setter/getter attribute, we save the default getter/setter
642  // selector names in anticipation of declaration of setter/getter methods.
643  PDecl->setGetterName(GetterSel);
644  PDecl->setSetterName(SetterSel);
645  PDecl->setPropertyAttributesAsWritten(
646  makePropertyAttributesAsWritten(AttributesAsWritten));
647 
648  if (Attributes & ObjCDeclSpec::DQ_PR_readonly)
649  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_readonly);
650 
651  if (Attributes & ObjCDeclSpec::DQ_PR_getter)
652  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_getter);
653 
654  if (Attributes & ObjCDeclSpec::DQ_PR_setter)
655  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_setter);
656 
657  if (isReadWrite)
658  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_readwrite);
659 
660  if (Attributes & ObjCDeclSpec::DQ_PR_retain)
661  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_retain);
662 
663  if (Attributes & ObjCDeclSpec::DQ_PR_strong)
664  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_strong);
665 
666  if (Attributes & ObjCDeclSpec::DQ_PR_weak)
667  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_weak);
668 
669  if (Attributes & ObjCDeclSpec::DQ_PR_copy)
670  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_copy);
671 
672  if (Attributes & ObjCDeclSpec::DQ_PR_unsafe_unretained)
673  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_unsafe_unretained);
674 
675  if (isAssign)
676  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_assign);
677 
678  // In the semantic attributes, one of nonatomic or atomic is always set.
679  if (Attributes & ObjCDeclSpec::DQ_PR_nonatomic)
680  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_nonatomic);
681  else
682  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_atomic);
683 
684  // 'unsafe_unretained' is alias for 'assign'.
685  if (Attributes & ObjCDeclSpec::DQ_PR_unsafe_unretained)
686  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_assign);
687  if (isAssign)
688  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_unsafe_unretained);
689 
690  if (MethodImplKind == tok::objc_required)
691  PDecl->setPropertyImplementation(ObjCPropertyDecl::Required);
692  else if (MethodImplKind == tok::objc_optional)
693  PDecl->setPropertyImplementation(ObjCPropertyDecl::Optional);
694 
695  if (Attributes & ObjCDeclSpec::DQ_PR_nullability)
696  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_nullability);
697 
698  if (Attributes & ObjCDeclSpec::DQ_PR_null_resettable)
699  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_null_resettable);
700 
701  if (Attributes & ObjCDeclSpec::DQ_PR_class)
702  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_class);
703 
704  return PDecl;
705 }
706 
707 static void checkARCPropertyImpl(Sema &S, SourceLocation propertyImplLoc,
708  ObjCPropertyDecl *property,
709  ObjCIvarDecl *ivar) {
710  if (property->isInvalidDecl() || ivar->isInvalidDecl()) return;
711 
712  QualType ivarType = ivar->getType();
713  Qualifiers::ObjCLifetime ivarLifetime = ivarType.getObjCLifetime();
714 
715  // The lifetime implied by the property's attributes.
716  Qualifiers::ObjCLifetime propertyLifetime =
718  property->getType());
719 
720  // We're fine if they match.
721  if (propertyLifetime == ivarLifetime) return;
722 
723  // None isn't a valid lifetime for an object ivar in ARC, and
724  // __autoreleasing is never valid; don't diagnose twice.
725  if ((ivarLifetime == Qualifiers::OCL_None &&
726  S.getLangOpts().ObjCAutoRefCount) ||
727  ivarLifetime == Qualifiers::OCL_Autoreleasing)
728  return;
729 
730  // If the ivar is private, and it's implicitly __unsafe_unretained
731  // becaues of its type, then pretend it was actually implicitly
732  // __strong. This is only sound because we're processing the
733  // property implementation before parsing any method bodies.
734  if (ivarLifetime == Qualifiers::OCL_ExplicitNone &&
735  propertyLifetime == Qualifiers::OCL_Strong &&
737  SplitQualType split = ivarType.split();
738  if (split.Quals.hasObjCLifetime()) {
739  assert(ivarType->isObjCARCImplicitlyUnretainedType());
741  ivarType = S.Context.getQualifiedType(split);
742  ivar->setType(ivarType);
743  return;
744  }
745  }
746 
747  switch (propertyLifetime) {
749  S.Diag(ivar->getLocation(), diag::err_arc_strong_property_ownership)
750  << property->getDeclName()
751  << ivar->getDeclName()
752  << ivarLifetime;
753  break;
754 
756  S.Diag(ivar->getLocation(), diag::err_weak_property)
757  << property->getDeclName()
758  << ivar->getDeclName();
759  break;
760 
762  S.Diag(ivar->getLocation(), diag::err_arc_assign_property_ownership)
763  << property->getDeclName()
764  << ivar->getDeclName()
765  << ((property->getPropertyAttributesAsWritten()
767  break;
768 
770  llvm_unreachable("properties cannot be autoreleasing");
771 
773  // Any other property should be ignored.
774  return;
775  }
776 
777  S.Diag(property->getLocation(), diag::note_property_declare);
778  if (propertyImplLoc.isValid())
779  S.Diag(propertyImplLoc, diag::note_property_synthesize);
780 }
781 
782 /// setImpliedPropertyAttributeForReadOnlyProperty -
783 /// This routine evaludates life-time attributes for a 'readonly'
784 /// property with no known lifetime of its own, using backing
785 /// 'ivar's attribute, if any. If no backing 'ivar', property's
786 /// life-time is assumed 'strong'.
788  ObjCPropertyDecl *property, ObjCIvarDecl *ivar) {
789  Qualifiers::ObjCLifetime propertyLifetime =
791  property->getType());
792  if (propertyLifetime != Qualifiers::OCL_None)
793  return;
794 
795  if (!ivar) {
796  // if no backing ivar, make property 'strong'.
797  property->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_strong);
798  return;
799  }
800  // property assumes owenership of backing ivar.
801  QualType ivarType = ivar->getType();
802  Qualifiers::ObjCLifetime ivarLifetime = ivarType.getObjCLifetime();
803  if (ivarLifetime == Qualifiers::OCL_Strong)
804  property->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_strong);
805  else if (ivarLifetime == Qualifiers::OCL_Weak)
806  property->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_weak);
807 }
808 
809 /// DiagnosePropertyMismatchDeclInProtocols - diagnose properties declared
810 /// in inherited protocols with mismatched types. Since any of them can
811 /// be candidate for synthesis.
812 static void
814  ObjCInterfaceDecl *ClassDecl,
817  for (const auto *PI : ClassDecl->all_referenced_protocols()) {
818  if (const ObjCProtocolDecl *PDecl = PI->getDefinition())
819  PDecl->collectInheritedProtocolProperties(Property, PropMap);
820  }
821  if (ObjCInterfaceDecl *SDecl = ClassDecl->getSuperClass())
822  while (SDecl) {
823  for (const auto *PI : SDecl->all_referenced_protocols()) {
824  if (const ObjCProtocolDecl *PDecl = PI->getDefinition())
825  PDecl->collectInheritedProtocolProperties(Property, PropMap);
826  }
827  SDecl = SDecl->getSuperClass();
828  }
829 
830  if (PropMap.empty())
831  return;
832 
833  QualType RHSType = S.Context.getCanonicalType(Property->getType());
834  bool FirsTime = true;
835  for (ObjCInterfaceDecl::ProtocolPropertyMap::iterator
836  I = PropMap.begin(), E = PropMap.end(); I != E; I++) {
837  ObjCPropertyDecl *Prop = I->second;
838  QualType LHSType = S.Context.getCanonicalType(Prop->getType());
839  if (!S.Context.propertyTypesAreCompatible(LHSType, RHSType)) {
840  bool IncompatibleObjC = false;
841  QualType ConvertedType;
842  if (!S.isObjCPointerConversion(RHSType, LHSType, ConvertedType, IncompatibleObjC)
843  || IncompatibleObjC) {
844  if (FirsTime) {
845  S.Diag(Property->getLocation(), diag::warn_protocol_property_mismatch)
846  << Property->getType();
847  FirsTime = false;
848  }
849  S.Diag(Prop->getLocation(), diag::note_protocol_property_declare)
850  << Prop->getType();
851  }
852  }
853  }
854  if (!FirsTime && AtLoc.isValid())
855  S.Diag(AtLoc, diag::note_property_synthesize);
856 }
857 
858 /// Determine whether any storage attributes were written on the property.
860  ObjCPropertyQueryKind QueryKind) {
861  if (Prop->getPropertyAttributesAsWritten() & OwnershipMask) return true;
862 
863  // If this is a readwrite property in a class extension that refines
864  // a readonly property in the original class definition, check it as
865  // well.
866 
867  // If it's a readonly property, we're not interested.
868  if (Prop->isReadOnly()) return false;
869 
870  // Is it declared in an extension?
871  auto Category = dyn_cast<ObjCCategoryDecl>(Prop->getDeclContext());
872  if (!Category || !Category->IsClassExtension()) return false;
873 
874  // Find the corresponding property in the primary class definition.
875  auto OrigClass = Category->getClassInterface();
876  for (auto Found : OrigClass->lookup(Prop->getDeclName())) {
877  if (ObjCPropertyDecl *OrigProp = dyn_cast<ObjCPropertyDecl>(Found))
878  return OrigProp->getPropertyAttributesAsWritten() & OwnershipMask;
879  }
880 
881  // Look through all of the protocols.
882  for (const auto *Proto : OrigClass->all_referenced_protocols()) {
883  if (ObjCPropertyDecl *OrigProp = Proto->FindPropertyDeclaration(
884  Prop->getIdentifier(), QueryKind))
885  return OrigProp->getPropertyAttributesAsWritten() & OwnershipMask;
886  }
887 
888  return false;
889 }
890 
891 /// ActOnPropertyImplDecl - This routine performs semantic checks and
892 /// builds the AST node for a property implementation declaration; declared
893 /// as \@synthesize or \@dynamic.
894 ///
896  SourceLocation AtLoc,
897  SourceLocation PropertyLoc,
898  bool Synthesize,
899  IdentifierInfo *PropertyId,
900  IdentifierInfo *PropertyIvar,
901  SourceLocation PropertyIvarLoc,
902  ObjCPropertyQueryKind QueryKind) {
903  ObjCContainerDecl *ClassImpDecl =
904  dyn_cast<ObjCContainerDecl>(CurContext);
905  // Make sure we have a context for the property implementation declaration.
906  if (!ClassImpDecl) {
907  Diag(AtLoc, diag::err_missing_property_context);
908  return nullptr;
909  }
910  if (PropertyIvarLoc.isInvalid())
911  PropertyIvarLoc = PropertyLoc;
912  SourceLocation PropertyDiagLoc = PropertyLoc;
913  if (PropertyDiagLoc.isInvalid())
914  PropertyDiagLoc = ClassImpDecl->getLocStart();
915  ObjCPropertyDecl *property = nullptr;
916  ObjCInterfaceDecl *IDecl = nullptr;
917  // Find the class or category class where this property must have
918  // a declaration.
919  ObjCImplementationDecl *IC = nullptr;
920  ObjCCategoryImplDecl *CatImplClass = nullptr;
921  if ((IC = dyn_cast<ObjCImplementationDecl>(ClassImpDecl))) {
922  IDecl = IC->getClassInterface();
923  // We always synthesize an interface for an implementation
924  // without an interface decl. So, IDecl is always non-zero.
925  assert(IDecl &&
926  "ActOnPropertyImplDecl - @implementation without @interface");
927 
928  // Look for this property declaration in the @implementation's @interface
929  property = IDecl->FindPropertyDeclaration(PropertyId, QueryKind);
930  if (!property) {
931  Diag(PropertyLoc, diag::err_bad_property_decl) << IDecl->getDeclName();
932  return nullptr;
933  }
934  if (property->isClassProperty() && Synthesize) {
935  Diag(PropertyLoc, diag::err_synthesize_on_class_property) << PropertyId;
936  return nullptr;
937  }
938  unsigned PIkind = property->getPropertyAttributesAsWritten();
939  if ((PIkind & (ObjCPropertyDecl::OBJC_PR_atomic |
941  if (AtLoc.isValid())
942  Diag(AtLoc, diag::warn_implicit_atomic_property);
943  else
944  Diag(IC->getLocation(), diag::warn_auto_implicit_atomic_property);
945  Diag(property->getLocation(), diag::note_property_declare);
946  }
947 
948  if (const ObjCCategoryDecl *CD =
949  dyn_cast<ObjCCategoryDecl>(property->getDeclContext())) {
950  if (!CD->IsClassExtension()) {
951  Diag(PropertyLoc, diag::err_category_property) << CD->getDeclName();
952  Diag(property->getLocation(), diag::note_property_declare);
953  return nullptr;
954  }
955  }
956  if (Synthesize&&
958  property->hasAttr<IBOutletAttr>() &&
959  !AtLoc.isValid()) {
960  bool ReadWriteProperty = false;
961  // Search into the class extensions and see if 'readonly property is
962  // redeclared 'readwrite', then no warning is to be issued.
963  for (auto *Ext : IDecl->known_extensions()) {
964  DeclContext::lookup_result R = Ext->lookup(property->getDeclName());
965  if (!R.empty())
966  if (ObjCPropertyDecl *ExtProp = dyn_cast<ObjCPropertyDecl>(R[0])) {
967  PIkind = ExtProp->getPropertyAttributesAsWritten();
969  ReadWriteProperty = true;
970  break;
971  }
972  }
973  }
974 
975  if (!ReadWriteProperty) {
976  Diag(property->getLocation(), diag::warn_auto_readonly_iboutlet_property)
977  << property;
978  SourceLocation readonlyLoc;
979  if (LocPropertyAttribute(Context, "readonly",
980  property->getLParenLoc(), readonlyLoc)) {
981  SourceLocation endLoc =
982  readonlyLoc.getLocWithOffset(strlen("readonly")-1);
983  SourceRange ReadonlySourceRange(readonlyLoc, endLoc);
984  Diag(property->getLocation(),
985  diag::note_auto_readonly_iboutlet_fixup_suggest) <<
986  FixItHint::CreateReplacement(ReadonlySourceRange, "readwrite");
987  }
988  }
989  }
990  if (Synthesize && isa<ObjCProtocolDecl>(property->getDeclContext()))
991  DiagnosePropertyMismatchDeclInProtocols(*this, AtLoc, IDecl, property);
992 
993  } else if ((CatImplClass = dyn_cast<ObjCCategoryImplDecl>(ClassImpDecl))) {
994  if (Synthesize) {
995  Diag(AtLoc, diag::err_synthesize_category_decl);
996  return nullptr;
997  }
998  IDecl = CatImplClass->getClassInterface();
999  if (!IDecl) {
1000  Diag(AtLoc, diag::err_missing_property_interface);
1001  return nullptr;
1002  }
1004  IDecl->FindCategoryDeclaration(CatImplClass->getIdentifier());
1005 
1006  // If category for this implementation not found, it is an error which
1007  // has already been reported eralier.
1008  if (!Category)
1009  return nullptr;
1010  // Look for this property declaration in @implementation's category
1011  property = Category->FindPropertyDeclaration(PropertyId, QueryKind);
1012  if (!property) {
1013  Diag(PropertyLoc, diag::err_bad_category_property_decl)
1014  << Category->getDeclName();
1015  return nullptr;
1016  }
1017  } else {
1018  Diag(AtLoc, diag::err_bad_property_context);
1019  return nullptr;
1020  }
1021  ObjCIvarDecl *Ivar = nullptr;
1022  bool CompleteTypeErr = false;
1023  bool compat = true;
1024  // Check that we have a valid, previously declared ivar for @synthesize
1025  if (Synthesize) {
1026  // @synthesize
1027  if (!PropertyIvar)
1028  PropertyIvar = PropertyId;
1029  // Check that this is a previously declared 'ivar' in 'IDecl' interface
1030  ObjCInterfaceDecl *ClassDeclared;
1031  Ivar = IDecl->lookupInstanceVariable(PropertyIvar, ClassDeclared);
1032  QualType PropType = property->getType();
1033  QualType PropertyIvarType = PropType.getNonReferenceType();
1034 
1035  if (RequireCompleteType(PropertyDiagLoc, PropertyIvarType,
1036  diag::err_incomplete_synthesized_property,
1037  property->getDeclName())) {
1038  Diag(property->getLocation(), diag::note_property_declare);
1039  CompleteTypeErr = true;
1040  }
1041 
1042  if (getLangOpts().ObjCAutoRefCount &&
1043  (property->getPropertyAttributesAsWritten() &
1045  PropertyIvarType->isObjCRetainableType()) {
1047  }
1048 
1050  = property->getPropertyAttributes();
1051 
1052  bool isARCWeak = false;
1053  if (kind & ObjCPropertyDecl::OBJC_PR_weak) {
1054  // Add GC __weak to the ivar type if the property is weak.
1055  if (getLangOpts().getGC() != LangOptions::NonGC) {
1056  assert(!getLangOpts().ObjCAutoRefCount);
1057  if (PropertyIvarType.isObjCGCStrong()) {
1058  Diag(PropertyDiagLoc, diag::err_gc_weak_property_strong_type);
1059  Diag(property->getLocation(), diag::note_property_declare);
1060  } else {
1061  PropertyIvarType =
1062  Context.getObjCGCQualType(PropertyIvarType, Qualifiers::Weak);
1063  }
1064 
1065  // Otherwise, check whether ARC __weak is enabled and works with
1066  // the property type.
1067  } else {
1068  if (!getLangOpts().ObjCWeak) {
1069  // Only complain here when synthesizing an ivar.
1070  if (!Ivar) {
1071  Diag(PropertyDiagLoc,
1072  getLangOpts().ObjCWeakRuntime
1073  ? diag::err_synthesizing_arc_weak_property_disabled
1074  : diag::err_synthesizing_arc_weak_property_no_runtime);
1075  Diag(property->getLocation(), diag::note_property_declare);
1076  }
1077  CompleteTypeErr = true; // suppress later diagnostics about the ivar
1078  } else {
1079  isARCWeak = true;
1080  if (const ObjCObjectPointerType *ObjT =
1081  PropertyIvarType->getAs<ObjCObjectPointerType>()) {
1082  const ObjCInterfaceDecl *ObjI = ObjT->getInterfaceDecl();
1083  if (ObjI && ObjI->isArcWeakrefUnavailable()) {
1084  Diag(property->getLocation(),
1085  diag::err_arc_weak_unavailable_property)
1086  << PropertyIvarType;
1087  Diag(ClassImpDecl->getLocation(), diag::note_implemented_by_class)
1088  << ClassImpDecl->getName();
1089  }
1090  }
1091  }
1092  }
1093  }
1094 
1095  if (AtLoc.isInvalid()) {
1096  // Check when default synthesizing a property that there is
1097  // an ivar matching property name and issue warning; since this
1098  // is the most common case of not using an ivar used for backing
1099  // property in non-default synthesis case.
1100  ObjCInterfaceDecl *ClassDeclared=nullptr;
1101  ObjCIvarDecl *originalIvar =
1102  IDecl->lookupInstanceVariable(property->getIdentifier(),
1103  ClassDeclared);
1104  if (originalIvar) {
1105  Diag(PropertyDiagLoc,
1106  diag::warn_autosynthesis_property_ivar_match)
1107  << PropertyId << (Ivar == nullptr) << PropertyIvar
1108  << originalIvar->getIdentifier();
1109  Diag(property->getLocation(), diag::note_property_declare);
1110  Diag(originalIvar->getLocation(), diag::note_ivar_decl);
1111  }
1112  }
1113 
1114  if (!Ivar) {
1115  // In ARC, give the ivar a lifetime qualifier based on the
1116  // property attributes.
1117  if ((getLangOpts().ObjCAutoRefCount || isARCWeak) &&
1118  !PropertyIvarType.getObjCLifetime() &&
1119  PropertyIvarType->isObjCRetainableType()) {
1120 
1121  // It's an error if we have to do this and the user didn't
1122  // explicitly write an ownership attribute on the property.
1123  if (!hasWrittenStorageAttribute(property, QueryKind) &&
1125  Diag(PropertyDiagLoc,
1126  diag::err_arc_objc_property_default_assign_on_object);
1127  Diag(property->getLocation(), diag::note_property_declare);
1128  } else {
1129  Qualifiers::ObjCLifetime lifetime =
1130  getImpliedARCOwnership(kind, PropertyIvarType);
1131  assert(lifetime && "no lifetime for property?");
1132 
1133  Qualifiers qs;
1134  qs.addObjCLifetime(lifetime);
1135  PropertyIvarType = Context.getQualifiedType(PropertyIvarType, qs);
1136  }
1137  }
1138 
1139  Ivar = ObjCIvarDecl::Create(Context, ClassImpDecl,
1140  PropertyIvarLoc,PropertyIvarLoc, PropertyIvar,
1141  PropertyIvarType, /*Dinfo=*/nullptr,
1143  (Expr *)nullptr, true);
1144  if (RequireNonAbstractType(PropertyIvarLoc,
1145  PropertyIvarType,
1146  diag::err_abstract_type_in_decl,
1148  Diag(property->getLocation(), diag::note_property_declare);
1149  // An abstract type is as bad as an incomplete type.
1150  CompleteTypeErr = true;
1151  }
1152  if (CompleteTypeErr)
1153  Ivar->setInvalidDecl();
1154  ClassImpDecl->addDecl(Ivar);
1155  IDecl->makeDeclVisibleInContext(Ivar);
1156 
1158  Diag(PropertyDiagLoc, diag::err_missing_property_ivar_decl)
1159  << PropertyId;
1160  // Note! I deliberately want it to fall thru so, we have a
1161  // a property implementation and to avoid future warnings.
1162  } else if (getLangOpts().ObjCRuntime.isNonFragile() &&
1163  !declaresSameEntity(ClassDeclared, IDecl)) {
1164  Diag(PropertyDiagLoc, diag::err_ivar_in_superclass_use)
1165  << property->getDeclName() << Ivar->getDeclName()
1166  << ClassDeclared->getDeclName();
1167  Diag(Ivar->getLocation(), diag::note_previous_access_declaration)
1168  << Ivar << Ivar->getName();
1169  // Note! I deliberately want it to fall thru so more errors are caught.
1170  }
1171  property->setPropertyIvarDecl(Ivar);
1172 
1173  QualType IvarType = Context.getCanonicalType(Ivar->getType());
1174 
1175  // Check that type of property and its ivar are type compatible.
1176  if (!Context.hasSameType(PropertyIvarType, IvarType)) {
1177  if (isa<ObjCObjectPointerType>(PropertyIvarType)
1178  && isa<ObjCObjectPointerType>(IvarType))
1179  compat =
1181  PropertyIvarType->getAs<ObjCObjectPointerType>(),
1182  IvarType->getAs<ObjCObjectPointerType>());
1183  else {
1184  compat = (CheckAssignmentConstraints(PropertyIvarLoc, PropertyIvarType,
1185  IvarType)
1186  == Compatible);
1187  }
1188  if (!compat) {
1189  Diag(PropertyDiagLoc, diag::err_property_ivar_type)
1190  << property->getDeclName() << PropType
1191  << Ivar->getDeclName() << IvarType;
1192  Diag(Ivar->getLocation(), diag::note_ivar_decl);
1193  // Note! I deliberately want it to fall thru so, we have a
1194  // a property implementation and to avoid future warnings.
1195  }
1196  else {
1197  // FIXME! Rules for properties are somewhat different that those
1198  // for assignments. Use a new routine to consolidate all cases;
1199  // specifically for property redeclarations as well as for ivars.
1200  QualType lhsType =Context.getCanonicalType(PropertyIvarType).getUnqualifiedType();
1201  QualType rhsType =Context.getCanonicalType(IvarType).getUnqualifiedType();
1202  if (lhsType != rhsType &&
1203  lhsType->isArithmeticType()) {
1204  Diag(PropertyDiagLoc, diag::err_property_ivar_type)
1205  << property->getDeclName() << PropType
1206  << Ivar->getDeclName() << IvarType;
1207  Diag(Ivar->getLocation(), diag::note_ivar_decl);
1208  // Fall thru - see previous comment
1209  }
1210  }
1211  // __weak is explicit. So it works on Canonical type.
1212  if ((PropType.isObjCGCWeak() && !IvarType.isObjCGCWeak() &&
1213  getLangOpts().getGC() != LangOptions::NonGC)) {
1214  Diag(PropertyDiagLoc, diag::err_weak_property)
1215  << property->getDeclName() << Ivar->getDeclName();
1216  Diag(Ivar->getLocation(), diag::note_ivar_decl);
1217  // Fall thru - see previous comment
1218  }
1219  // Fall thru - see previous comment
1220  if ((property->getType()->isObjCObjectPointerType() ||
1221  PropType.isObjCGCStrong()) && IvarType.isObjCGCWeak() &&
1222  getLangOpts().getGC() != LangOptions::NonGC) {
1223  Diag(PropertyDiagLoc, diag::err_strong_property)
1224  << property->getDeclName() << Ivar->getDeclName();
1225  // Fall thru - see previous comment
1226  }
1227  }
1228  if (getLangOpts().ObjCAutoRefCount || isARCWeak ||
1229  Ivar->getType().getObjCLifetime())
1230  checkARCPropertyImpl(*this, PropertyLoc, property, Ivar);
1231  } else if (PropertyIvar)
1232  // @dynamic
1233  Diag(PropertyDiagLoc, diag::err_dynamic_property_ivar_decl);
1234 
1235  assert (property && "ActOnPropertyImplDecl - property declaration missing");
1236  ObjCPropertyImplDecl *PIDecl =
1237  ObjCPropertyImplDecl::Create(Context, CurContext, AtLoc, PropertyLoc,
1238  property,
1239  (Synthesize ?
1242  Ivar, PropertyIvarLoc);
1243 
1244  if (CompleteTypeErr || !compat)
1245  PIDecl->setInvalidDecl();
1246 
1247  if (ObjCMethodDecl *getterMethod = property->getGetterMethodDecl()) {
1248  getterMethod->createImplicitParams(Context, IDecl);
1249  if (getLangOpts().CPlusPlus && Synthesize && !CompleteTypeErr &&
1250  Ivar->getType()->isRecordType()) {
1251  // For Objective-C++, need to synthesize the AST for the IVAR object to be
1252  // returned by the getter as it must conform to C++'s copy-return rules.
1253  // FIXME. Eventually we want to do this for Objective-C as well.
1254  SynthesizedFunctionScope Scope(*this, getterMethod);
1255  ImplicitParamDecl *SelfDecl = getterMethod->getSelfDecl();
1256  DeclRefExpr *SelfExpr =
1257  new (Context) DeclRefExpr(SelfDecl, false, SelfDecl->getType(),
1258  VK_LValue, PropertyDiagLoc);
1259  MarkDeclRefReferenced(SelfExpr);
1260  Expr *LoadSelfExpr =
1262  CK_LValueToRValue, SelfExpr, nullptr,
1263  VK_RValue);
1264  Expr *IvarRefExpr =
1265  new (Context) ObjCIvarRefExpr(Ivar,
1266  Ivar->getUsageType(SelfDecl->getType()),
1267  PropertyDiagLoc,
1268  Ivar->getLocation(),
1269  LoadSelfExpr, true, true);
1271  InitializedEntity::InitializeResult(PropertyDiagLoc,
1272  getterMethod->getReturnType(),
1273  /*NRVO=*/false),
1274  PropertyDiagLoc, IvarRefExpr);
1275  if (!Res.isInvalid()) {
1276  Expr *ResExpr = Res.getAs<Expr>();
1277  if (ResExpr)
1278  ResExpr = MaybeCreateExprWithCleanups(ResExpr);
1279  PIDecl->setGetterCXXConstructor(ResExpr);
1280  }
1281  }
1282  if (property->hasAttr<NSReturnsNotRetainedAttr>() &&
1283  !getterMethod->hasAttr<NSReturnsNotRetainedAttr>()) {
1284  Diag(getterMethod->getLocation(),
1285  diag::warn_property_getter_owning_mismatch);
1286  Diag(property->getLocation(), diag::note_property_declare);
1287  }
1288  if (getLangOpts().ObjCAutoRefCount && Synthesize)
1289  switch (getterMethod->getMethodFamily()) {
1290  case OMF_retain:
1291  case OMF_retainCount:
1292  case OMF_release:
1293  case OMF_autorelease:
1294  Diag(getterMethod->getLocation(), diag::err_arc_illegal_method_def)
1295  << 1 << getterMethod->getSelector();
1296  break;
1297  default:
1298  break;
1299  }
1300  }
1301  if (ObjCMethodDecl *setterMethod = property->getSetterMethodDecl()) {
1302  setterMethod->createImplicitParams(Context, IDecl);
1303  if (getLangOpts().CPlusPlus && Synthesize && !CompleteTypeErr &&
1304  Ivar->getType()->isRecordType()) {
1305  // FIXME. Eventually we want to do this for Objective-C as well.
1306  SynthesizedFunctionScope Scope(*this, setterMethod);
1307  ImplicitParamDecl *SelfDecl = setterMethod->getSelfDecl();
1308  DeclRefExpr *SelfExpr =
1309  new (Context) DeclRefExpr(SelfDecl, false, SelfDecl->getType(),
1310  VK_LValue, PropertyDiagLoc);
1311  MarkDeclRefReferenced(SelfExpr);
1312  Expr *LoadSelfExpr =
1314  CK_LValueToRValue, SelfExpr, nullptr,
1315  VK_RValue);
1316  Expr *lhs =
1317  new (Context) ObjCIvarRefExpr(Ivar,
1318  Ivar->getUsageType(SelfDecl->getType()),
1319  PropertyDiagLoc,
1320  Ivar->getLocation(),
1321  LoadSelfExpr, true, true);
1322  ObjCMethodDecl::param_iterator P = setterMethod->param_begin();
1323  ParmVarDecl *Param = (*P);
1324  QualType T = Param->getType().getNonReferenceType();
1325  DeclRefExpr *rhs = new (Context) DeclRefExpr(Param, false, T,
1326  VK_LValue, PropertyDiagLoc);
1327  MarkDeclRefReferenced(rhs);
1328  ExprResult Res = BuildBinOp(S, PropertyDiagLoc,
1329  BO_Assign, lhs, rhs);
1330  if (property->getPropertyAttributes() &
1332  Expr *callExpr = Res.getAs<Expr>();
1333  if (const CXXOperatorCallExpr *CXXCE =
1334  dyn_cast_or_null<CXXOperatorCallExpr>(callExpr))
1335  if (const FunctionDecl *FuncDecl = CXXCE->getDirectCallee())
1336  if (!FuncDecl->isTrivial())
1337  if (property->getType()->isReferenceType()) {
1338  Diag(PropertyDiagLoc,
1339  diag::err_atomic_property_nontrivial_assign_op)
1340  << property->getType();
1341  Diag(FuncDecl->getLocStart(),
1342  diag::note_callee_decl) << FuncDecl;
1343  }
1344  }
1345  PIDecl->setSetterCXXAssignment(Res.getAs<Expr>());
1346  }
1347  }
1348 
1349  if (IC) {
1350  if (Synthesize)
1351  if (ObjCPropertyImplDecl *PPIDecl =
1352  IC->FindPropertyImplIvarDecl(PropertyIvar)) {
1353  Diag(PropertyLoc, diag::err_duplicate_ivar_use)
1354  << PropertyId << PPIDecl->getPropertyDecl()->getIdentifier()
1355  << PropertyIvar;
1356  Diag(PPIDecl->getLocation(), diag::note_previous_use);
1357  }
1358 
1359  if (ObjCPropertyImplDecl *PPIDecl
1360  = IC->FindPropertyImplDecl(PropertyId, QueryKind)) {
1361  Diag(PropertyLoc, diag::err_property_implemented) << PropertyId;
1362  Diag(PPIDecl->getLocation(), diag::note_previous_declaration);
1363  return nullptr;
1364  }
1365  IC->addPropertyImplementation(PIDecl);
1366  if (getLangOpts().ObjCDefaultSynthProperties &&
1368  !IDecl->isObjCRequiresPropertyDefs()) {
1369  // Diagnose if an ivar was lazily synthesdized due to a previous
1370  // use and if 1) property is @dynamic or 2) property is synthesized
1371  // but it requires an ivar of different name.
1372  ObjCInterfaceDecl *ClassDeclared=nullptr;
1373  ObjCIvarDecl *Ivar = nullptr;
1374  if (!Synthesize)
1375  Ivar = IDecl->lookupInstanceVariable(PropertyId, ClassDeclared);
1376  else {
1377  if (PropertyIvar && PropertyIvar != PropertyId)
1378  Ivar = IDecl->lookupInstanceVariable(PropertyId, ClassDeclared);
1379  }
1380  // Issue diagnostics only if Ivar belongs to current class.
1381  if (Ivar && Ivar->getSynthesize() &&
1382  declaresSameEntity(IC->getClassInterface(), ClassDeclared)) {
1383  Diag(Ivar->getLocation(), diag::err_undeclared_var_use)
1384  << PropertyId;
1385  Ivar->setInvalidDecl();
1386  }
1387  }
1388  } else {
1389  if (Synthesize)
1390  if (ObjCPropertyImplDecl *PPIDecl =
1391  CatImplClass->FindPropertyImplIvarDecl(PropertyIvar)) {
1392  Diag(PropertyDiagLoc, diag::err_duplicate_ivar_use)
1393  << PropertyId << PPIDecl->getPropertyDecl()->getIdentifier()
1394  << PropertyIvar;
1395  Diag(PPIDecl->getLocation(), diag::note_previous_use);
1396  }
1397 
1398  if (ObjCPropertyImplDecl *PPIDecl =
1399  CatImplClass->FindPropertyImplDecl(PropertyId, QueryKind)) {
1400  Diag(PropertyDiagLoc, diag::err_property_implemented) << PropertyId;
1401  Diag(PPIDecl->getLocation(), diag::note_previous_declaration);
1402  return nullptr;
1403  }
1404  CatImplClass->addPropertyImplementation(PIDecl);
1405  }
1406 
1407  return PIDecl;
1408 }
1409 
1410 //===----------------------------------------------------------------------===//
1411 // Helper methods.
1412 //===----------------------------------------------------------------------===//
1413 
1414 /// DiagnosePropertyMismatch - Compares two properties for their
1415 /// attributes and types and warns on a variety of inconsistencies.
1416 ///
1417 void
1419  ObjCPropertyDecl *SuperProperty,
1420  const IdentifierInfo *inheritedName,
1421  bool OverridingProtocolProperty) {
1423  Property->getPropertyAttributes();
1425  SuperProperty->getPropertyAttributes();
1426 
1427  // We allow readonly properties without an explicit ownership
1428  // (assign/unsafe_unretained/weak/retain/strong/copy) in super class
1429  // to be overridden by a property with any explicit ownership in the subclass.
1430  if (!OverridingProtocolProperty &&
1431  !getOwnershipRule(SAttr) && getOwnershipRule(CAttr))
1432  ;
1433  else {
1436  Diag(Property->getLocation(), diag::warn_readonly_property)
1437  << Property->getDeclName() << inheritedName;
1438  if ((CAttr & ObjCPropertyDecl::OBJC_PR_copy)
1439  != (SAttr & ObjCPropertyDecl::OBJC_PR_copy))
1440  Diag(Property->getLocation(), diag::warn_property_attribute)
1441  << Property->getDeclName() << "copy" << inheritedName;
1442  else if (!(SAttr & ObjCPropertyDecl::OBJC_PR_readonly)){
1443  unsigned CAttrRetain =
1444  (CAttr &
1446  unsigned SAttrRetain =
1447  (SAttr &
1449  bool CStrong = (CAttrRetain != 0);
1450  bool SStrong = (SAttrRetain != 0);
1451  if (CStrong != SStrong)
1452  Diag(Property->getLocation(), diag::warn_property_attribute)
1453  << Property->getDeclName() << "retain (or strong)" << inheritedName;
1454  }
1455  }
1456 
1457  // Check for nonatomic; note that nonatomic is effectively
1458  // meaningless for readonly properties, so don't diagnose if the
1459  // atomic property is 'readonly'.
1460  checkAtomicPropertyMismatch(*this, SuperProperty, Property, false);
1461  if (Property->getSetterName() != SuperProperty->getSetterName()) {
1462  Diag(Property->getLocation(), diag::warn_property_attribute)
1463  << Property->getDeclName() << "setter" << inheritedName;
1464  Diag(SuperProperty->getLocation(), diag::note_property_declare);
1465  }
1466  if (Property->getGetterName() != SuperProperty->getGetterName()) {
1467  Diag(Property->getLocation(), diag::warn_property_attribute)
1468  << Property->getDeclName() << "getter" << inheritedName;
1469  Diag(SuperProperty->getLocation(), diag::note_property_declare);
1470  }
1471 
1472  QualType LHSType =
1473  Context.getCanonicalType(SuperProperty->getType());
1474  QualType RHSType =
1475  Context.getCanonicalType(Property->getType());
1476 
1477  if (!Context.propertyTypesAreCompatible(LHSType, RHSType)) {
1478  // Do cases not handled in above.
1479  // FIXME. For future support of covariant property types, revisit this.
1480  bool IncompatibleObjC = false;
1481  QualType ConvertedType;
1482  if (!isObjCPointerConversion(RHSType, LHSType,
1483  ConvertedType, IncompatibleObjC) ||
1484  IncompatibleObjC) {
1485  Diag(Property->getLocation(), diag::warn_property_types_are_incompatible)
1486  << Property->getType() << SuperProperty->getType() << inheritedName;
1487  Diag(SuperProperty->getLocation(), diag::note_property_declare);
1488  }
1489  }
1490 }
1491 
1493  ObjCMethodDecl *GetterMethod,
1494  SourceLocation Loc) {
1495  if (!GetterMethod)
1496  return false;
1497  QualType GetterType = GetterMethod->getReturnType().getNonReferenceType();
1498  QualType PropertyRValueType =
1499  property->getType().getNonReferenceType().getAtomicUnqualifiedType();
1500  bool compat = Context.hasSameType(PropertyRValueType, GetterType);
1501  if (!compat) {
1502  const ObjCObjectPointerType *propertyObjCPtr = nullptr;
1503  const ObjCObjectPointerType *getterObjCPtr = nullptr;
1504  if ((propertyObjCPtr =
1505  PropertyRValueType->getAs<ObjCObjectPointerType>()) &&
1506  (getterObjCPtr = GetterType->getAs<ObjCObjectPointerType>()))
1507  compat = Context.canAssignObjCInterfaces(getterObjCPtr, propertyObjCPtr);
1508  else if (CheckAssignmentConstraints(Loc, GetterType, PropertyRValueType)
1509  != Compatible) {
1510  Diag(Loc, diag::err_property_accessor_type)
1511  << property->getDeclName() << PropertyRValueType
1512  << GetterMethod->getSelector() << GetterType;
1513  Diag(GetterMethod->getLocation(), diag::note_declared_at);
1514  return true;
1515  } else {
1516  compat = true;
1517  QualType lhsType = Context.getCanonicalType(PropertyRValueType);
1518  QualType rhsType =Context.getCanonicalType(GetterType).getUnqualifiedType();
1519  if (lhsType != rhsType && lhsType->isArithmeticType())
1520  compat = false;
1521  }
1522  }
1523 
1524  if (!compat) {
1525  Diag(Loc, diag::warn_accessor_property_type_mismatch)
1526  << property->getDeclName()
1527  << GetterMethod->getSelector();
1528  Diag(GetterMethod->getLocation(), diag::note_declared_at);
1529  return true;
1530  }
1531 
1532  return false;
1533 }
1534 
1535 /// CollectImmediateProperties - This routine collects all properties in
1536 /// the class and its conforming protocols; but not those in its super class.
1537 static void
1540  ObjCContainerDecl::PropertyMap &SuperPropMap,
1541  bool CollectClassPropsOnly = false,
1542  bool IncludeProtocols = true) {
1543  if (ObjCInterfaceDecl *IDecl = dyn_cast<ObjCInterfaceDecl>(CDecl)) {
1544  for (auto *Prop : IDecl->properties()) {
1545  if (CollectClassPropsOnly && !Prop->isClassProperty())
1546  continue;
1547  PropMap[std::make_pair(Prop->getIdentifier(), Prop->isClassProperty())] =
1548  Prop;
1549  }
1550 
1551  // Collect the properties from visible extensions.
1552  for (auto *Ext : IDecl->visible_extensions())
1553  CollectImmediateProperties(Ext, PropMap, SuperPropMap,
1554  CollectClassPropsOnly, IncludeProtocols);
1555 
1556  if (IncludeProtocols) {
1557  // Scan through class's protocols.
1558  for (auto *PI : IDecl->all_referenced_protocols())
1559  CollectImmediateProperties(PI, PropMap, SuperPropMap,
1560  CollectClassPropsOnly);
1561  }
1562  }
1563  if (ObjCCategoryDecl *CATDecl = dyn_cast<ObjCCategoryDecl>(CDecl)) {
1564  for (auto *Prop : CATDecl->properties()) {
1565  if (CollectClassPropsOnly && !Prop->isClassProperty())
1566  continue;
1567  PropMap[std::make_pair(Prop->getIdentifier(), Prop->isClassProperty())] =
1568  Prop;
1569  }
1570  if (IncludeProtocols) {
1571  // Scan through class's protocols.
1572  for (auto *PI : CATDecl->protocols())
1573  CollectImmediateProperties(PI, PropMap, SuperPropMap,
1574  CollectClassPropsOnly);
1575  }
1576  }
1577  else if (ObjCProtocolDecl *PDecl = dyn_cast<ObjCProtocolDecl>(CDecl)) {
1578  for (auto *Prop : PDecl->properties()) {
1579  if (CollectClassPropsOnly && !Prop->isClassProperty())
1580  continue;
1581  ObjCPropertyDecl *PropertyFromSuper =
1582  SuperPropMap[std::make_pair(Prop->getIdentifier(),
1583  Prop->isClassProperty())];
1584  // Exclude property for protocols which conform to class's super-class,
1585  // as super-class has to implement the property.
1586  if (!PropertyFromSuper ||
1587  PropertyFromSuper->getIdentifier() != Prop->getIdentifier()) {
1588  ObjCPropertyDecl *&PropEntry =
1589  PropMap[std::make_pair(Prop->getIdentifier(),
1590  Prop->isClassProperty())];
1591  if (!PropEntry)
1592  PropEntry = Prop;
1593  }
1594  }
1595  // Scan through protocol's protocols.
1596  for (auto *PI : PDecl->protocols())
1597  CollectImmediateProperties(PI, PropMap, SuperPropMap,
1598  CollectClassPropsOnly);
1599  }
1600 }
1601 
1602 /// CollectSuperClassPropertyImplementations - This routine collects list of
1603 /// properties to be implemented in super class(s) and also coming from their
1604 /// conforming protocols.
1606  ObjCInterfaceDecl::PropertyMap &PropMap) {
1607  if (ObjCInterfaceDecl *SDecl = CDecl->getSuperClass()) {
1609  while (SDecl) {
1610  SDecl->collectPropertiesToImplement(PropMap, PO);
1611  SDecl = SDecl->getSuperClass();
1612  }
1613  }
1614 }
1615 
1616 /// IvarBacksCurrentMethodAccessor - This routine returns 'true' if 'IV' is
1617 /// an ivar synthesized for 'Method' and 'Method' is a property accessor
1618 /// declared in class 'IFace'.
1619 bool
1621  ObjCMethodDecl *Method, ObjCIvarDecl *IV) {
1622  if (!IV->getSynthesize())
1623  return false;
1624  ObjCMethodDecl *IMD = IFace->lookupMethod(Method->getSelector(),
1625  Method->isInstanceMethod());
1626  if (!IMD || !IMD->isPropertyAccessor())
1627  return false;
1628 
1629  // look up a property declaration whose one of its accessors is implemented
1630  // by this method.
1631  for (const auto *Property : IFace->instance_properties()) {
1632  if ((Property->getGetterName() == IMD->getSelector() ||
1633  Property->getSetterName() == IMD->getSelector()) &&
1634  (Property->getPropertyIvarDecl() == IV))
1635  return true;
1636  }
1637  // Also look up property declaration in class extension whose one of its
1638  // accessors is implemented by this method.
1639  for (const auto *Ext : IFace->known_extensions())
1640  for (const auto *Property : Ext->instance_properties())
1641  if ((Property->getGetterName() == IMD->getSelector() ||
1642  Property->getSetterName() == IMD->getSelector()) &&
1643  (Property->getPropertyIvarDecl() == IV))
1644  return true;
1645  return false;
1646 }
1647 
1649  ObjCPropertyDecl *Prop) {
1650  bool SuperClassImplementsGetter = false;
1651  bool SuperClassImplementsSetter = false;
1653  SuperClassImplementsSetter = true;
1654 
1655  while (IDecl->getSuperClass()) {
1656  ObjCInterfaceDecl *SDecl = IDecl->getSuperClass();
1657  if (!SuperClassImplementsGetter && SDecl->getInstanceMethod(Prop->getGetterName()))
1658  SuperClassImplementsGetter = true;
1659 
1660  if (!SuperClassImplementsSetter && SDecl->getInstanceMethod(Prop->getSetterName()))
1661  SuperClassImplementsSetter = true;
1662  if (SuperClassImplementsGetter && SuperClassImplementsSetter)
1663  return true;
1664  IDecl = IDecl->getSuperClass();
1665  }
1666  return false;
1667 }
1668 
1669 /// \brief Default synthesizes all properties which must be synthesized
1670 /// in class's \@implementation.
1672  ObjCInterfaceDecl *IDecl) {
1675  IDecl->collectPropertiesToImplement(PropMap, PropertyOrder);
1676  if (PropMap.empty())
1677  return;
1678  ObjCInterfaceDecl::PropertyMap SuperPropMap;
1679  CollectSuperClassPropertyImplementations(IDecl, SuperPropMap);
1680 
1681  for (unsigned i = 0, e = PropertyOrder.size(); i != e; i++) {
1682  ObjCPropertyDecl *Prop = PropertyOrder[i];
1683  // Is there a matching property synthesize/dynamic?
1684  if (Prop->isInvalidDecl() ||
1685  Prop->isClassProperty() ||
1687  continue;
1688  // Property may have been synthesized by user.
1689  if (IMPDecl->FindPropertyImplDecl(
1690  Prop->getIdentifier(), Prop->getQueryKind()))
1691  continue;
1692  if (IMPDecl->getInstanceMethod(Prop->getGetterName())) {
1694  continue;
1695  if (IMPDecl->getInstanceMethod(Prop->getSetterName()))
1696  continue;
1697  }
1698  if (ObjCPropertyImplDecl *PID =
1699  IMPDecl->FindPropertyImplIvarDecl(Prop->getIdentifier())) {
1700  Diag(Prop->getLocation(), diag::warn_no_autosynthesis_shared_ivar_property)
1701  << Prop->getIdentifier();
1702  if (PID->getLocation().isValid())
1703  Diag(PID->getLocation(), diag::note_property_synthesize);
1704  continue;
1705  }
1706  ObjCPropertyDecl *PropInSuperClass =
1707  SuperPropMap[std::make_pair(Prop->getIdentifier(),
1708  Prop->isClassProperty())];
1709  if (ObjCProtocolDecl *Proto =
1710  dyn_cast<ObjCProtocolDecl>(Prop->getDeclContext())) {
1711  // We won't auto-synthesize properties declared in protocols.
1712  // Suppress the warning if class's superclass implements property's
1713  // getter and implements property's setter (if readwrite property).
1714  // Or, if property is going to be implemented in its super class.
1715  if (!SuperClassImplementsProperty(IDecl, Prop) && !PropInSuperClass) {
1716  Diag(IMPDecl->getLocation(),
1717  diag::warn_auto_synthesizing_protocol_property)
1718  << Prop << Proto;
1719  Diag(Prop->getLocation(), diag::note_property_declare);
1720  }
1721  continue;
1722  }
1723  // If property to be implemented in the super class, ignore.
1724  if (PropInSuperClass) {
1726  (PropInSuperClass->getPropertyAttributes() &
1728  !IMPDecl->getInstanceMethod(Prop->getSetterName()) &&
1729  !IDecl->HasUserDeclaredSetterMethod(Prop)) {
1730  Diag(Prop->getLocation(), diag::warn_no_autosynthesis_property)
1731  << Prop->getIdentifier();
1732  Diag(PropInSuperClass->getLocation(), diag::note_property_declare);
1733  }
1734  else {
1735  Diag(Prop->getLocation(), diag::warn_autosynthesis_property_in_superclass)
1736  << Prop->getIdentifier();
1737  Diag(PropInSuperClass->getLocation(), diag::note_property_declare);
1738  Diag(IMPDecl->getLocation(), diag::note_while_in_implementation);
1739  }
1740  continue;
1741  }
1742  // We use invalid SourceLocations for the synthesized ivars since they
1743  // aren't really synthesized at a particular location; they just exist.
1744  // Saying that they are located at the @implementation isn't really going
1745  // to help users.
1746  ObjCPropertyImplDecl *PIDecl = dyn_cast_or_null<ObjCPropertyImplDecl>(
1748  true,
1749  /* property = */ Prop->getIdentifier(),
1750  /* ivar = */ Prop->getDefaultSynthIvarName(Context),
1751  Prop->getLocation(), Prop->getQueryKind()));
1752  if (PIDecl) {
1753  Diag(Prop->getLocation(), diag::warn_missing_explicit_synthesis);
1754  Diag(IMPDecl->getLocation(), diag::note_while_in_implementation);
1755  }
1756  }
1757 }
1758 
1760  if (!LangOpts.ObjCDefaultSynthProperties || LangOpts.ObjCRuntime.isFragile())
1761  return;
1762  ObjCImplementationDecl *IC=dyn_cast_or_null<ObjCImplementationDecl>(D);
1763  if (!IC)
1764  return;
1765  if (ObjCInterfaceDecl* IDecl = IC->getClassInterface())
1766  if (!IDecl->isObjCRequiresPropertyDefs())
1767  DefaultSynthesizeProperties(S, IC, IDecl);
1768 }
1769 
1771  Sema &S, ObjCInterfaceDecl *PrimaryClass, Selector Method,
1772  ObjCImplDecl *IMPDecl, ObjCContainerDecl *CDecl, ObjCCategoryDecl *C,
1773  ObjCPropertyDecl *Prop,
1774  llvm::SmallPtrSet<const ObjCMethodDecl *, 8> &SMap) {
1775  // Check to see if we have a corresponding selector in SMap and with the
1776  // right method type.
1777  auto I = std::find_if(SMap.begin(), SMap.end(),
1778  [&](const ObjCMethodDecl *x) {
1779  return x->getSelector() == Method &&
1780  x->isClassMethod() == Prop->isClassProperty();
1781  });
1782  // When reporting on missing property setter/getter implementation in
1783  // categories, do not report when they are declared in primary class,
1784  // class's protocol, or one of it super classes. This is because,
1785  // the class is going to implement them.
1786  if (I == SMap.end() &&
1787  (PrimaryClass == nullptr ||
1788  !PrimaryClass->lookupPropertyAccessor(Method, C,
1789  Prop->isClassProperty()))) {
1790  unsigned diag =
1791  isa<ObjCCategoryDecl>(CDecl)
1792  ? (Prop->isClassProperty()
1793  ? diag::warn_impl_required_in_category_for_class_property
1794  : diag::warn_setter_getter_impl_required_in_category)
1795  : (Prop->isClassProperty()
1796  ? diag::warn_impl_required_for_class_property
1797  : diag::warn_setter_getter_impl_required);
1798  S.Diag(IMPDecl->getLocation(), diag) << Prop->getDeclName() << Method;
1799  S.Diag(Prop->getLocation(), diag::note_property_declare);
1800  if (S.LangOpts.ObjCDefaultSynthProperties &&
1802  if (ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(CDecl))
1803  if (const ObjCInterfaceDecl *RID = ID->isObjCRequiresPropertyDefs())
1804  S.Diag(RID->getLocation(), diag::note_suppressed_class_declare);
1805  }
1806 }
1807 
1809  ObjCContainerDecl *CDecl,
1810  bool SynthesizeProperties) {
1812  ObjCInterfaceDecl *IDecl = dyn_cast<ObjCInterfaceDecl>(CDecl);
1813 
1814  // Since we don't synthesize class properties, we should emit diagnose even
1815  // if SynthesizeProperties is true.
1816  ObjCContainerDecl::PropertyMap NoNeedToImplPropMap;
1817  // Gather properties which need not be implemented in this class
1818  // or category.
1819  if (!IDecl)
1820  if (ObjCCategoryDecl *C = dyn_cast<ObjCCategoryDecl>(CDecl)) {
1821  // For categories, no need to implement properties declared in
1822  // its primary class (and its super classes) if property is
1823  // declared in one of those containers.
1824  if ((IDecl = C->getClassInterface())) {
1826  IDecl->collectPropertiesToImplement(NoNeedToImplPropMap, PO);
1827  }
1828  }
1829  if (IDecl)
1830  CollectSuperClassPropertyImplementations(IDecl, NoNeedToImplPropMap);
1831 
1832  // When SynthesizeProperties is true, we only check class properties.
1833  CollectImmediateProperties(CDecl, PropMap, NoNeedToImplPropMap,
1834  SynthesizeProperties/*CollectClassPropsOnly*/);
1835 
1836  // Scan the @interface to see if any of the protocols it adopts
1837  // require an explicit implementation, via attribute
1838  // 'objc_protocol_requires_explicit_implementation'.
1839  if (IDecl) {
1840  std::unique_ptr<ObjCContainerDecl::PropertyMap> LazyMap;
1841 
1842  for (auto *PDecl : IDecl->all_referenced_protocols()) {
1843  if (!PDecl->hasAttr<ObjCExplicitProtocolImplAttr>())
1844  continue;
1845  // Lazily construct a set of all the properties in the @interface
1846  // of the class, without looking at the superclass. We cannot
1847  // use the call to CollectImmediateProperties() above as that
1848  // utilizes information from the super class's properties as well
1849  // as scans the adopted protocols. This work only triggers for protocols
1850  // with the attribute, which is very rare, and only occurs when
1851  // analyzing the @implementation.
1852  if (!LazyMap) {
1853  ObjCContainerDecl::PropertyMap NoNeedToImplPropMap;
1854  LazyMap.reset(new ObjCContainerDecl::PropertyMap());
1855  CollectImmediateProperties(CDecl, *LazyMap, NoNeedToImplPropMap,
1856  /* CollectClassPropsOnly */ false,
1857  /* IncludeProtocols */ false);
1858  }
1859  // Add the properties of 'PDecl' to the list of properties that
1860  // need to be implemented.
1861  for (auto *PropDecl : PDecl->properties()) {
1862  if ((*LazyMap)[std::make_pair(PropDecl->getIdentifier(),
1863  PropDecl->isClassProperty())])
1864  continue;
1865  PropMap[std::make_pair(PropDecl->getIdentifier(),
1866  PropDecl->isClassProperty())] = PropDecl;
1867  }
1868  }
1869  }
1870 
1871  if (PropMap.empty())
1872  return;
1873 
1875  for (const auto *I : IMPDecl->property_impls())
1876  PropImplMap.insert(I->getPropertyDecl());
1877 
1878  llvm::SmallPtrSet<const ObjCMethodDecl *, 8> InsMap;
1879  // Collect property accessors implemented in current implementation.
1880  for (const auto *I : IMPDecl->methods())
1881  InsMap.insert(I);
1882 
1883  ObjCCategoryDecl *C = dyn_cast<ObjCCategoryDecl>(CDecl);
1884  ObjCInterfaceDecl *PrimaryClass = nullptr;
1885  if (C && !C->IsClassExtension())
1886  if ((PrimaryClass = C->getClassInterface()))
1887  // Report unimplemented properties in the category as well.
1888  if (ObjCImplDecl *IMP = PrimaryClass->getImplementation()) {
1889  // When reporting on missing setter/getters, do not report when
1890  // setter/getter is implemented in category's primary class
1891  // implementation.
1892  for (const auto *I : IMP->methods())
1893  InsMap.insert(I);
1894  }
1895 
1896  for (ObjCContainerDecl::PropertyMap::iterator
1897  P = PropMap.begin(), E = PropMap.end(); P != E; ++P) {
1898  ObjCPropertyDecl *Prop = P->second;
1899  // Is there a matching property synthesize/dynamic?
1900  if (Prop->isInvalidDecl() ||
1902  PropImplMap.count(Prop) ||
1903  Prop->getAvailability() == AR_Unavailable)
1904  continue;
1905 
1906  // Diagnose unimplemented getters and setters.
1908  PrimaryClass, Prop->getGetterName(), IMPDecl, CDecl, C, Prop, InsMap);
1909  if (!Prop->isReadOnly())
1911  PrimaryClass, Prop->getSetterName(),
1912  IMPDecl, CDecl, C, Prop, InsMap);
1913  }
1914 }
1915 
1917  for (const auto *propertyImpl : impDecl->property_impls()) {
1918  const auto *property = propertyImpl->getPropertyDecl();
1919 
1920  // Warn about null_resettable properties with synthesized setters,
1921  // because the setter won't properly handle nil.
1922  if (propertyImpl->getPropertyImplementation()
1924  (property->getPropertyAttributes() &
1926  property->getGetterMethodDecl() &&
1927  property->getSetterMethodDecl()) {
1928  auto *getterMethod = property->getGetterMethodDecl();
1929  auto *setterMethod = property->getSetterMethodDecl();
1930  if (!impDecl->getInstanceMethod(setterMethod->getSelector()) &&
1931  !impDecl->getInstanceMethod(getterMethod->getSelector())) {
1932  SourceLocation loc = propertyImpl->getLocation();
1933  if (loc.isInvalid())
1934  loc = impDecl->getLocStart();
1935 
1936  Diag(loc, diag::warn_null_resettable_setter)
1937  << setterMethod->getSelector() << property->getDeclName();
1938  }
1939  }
1940  }
1941 }
1942 
1943 void
1945  ObjCInterfaceDecl* IDecl) {
1946  // Rules apply in non-GC mode only
1947  if (getLangOpts().getGC() != LangOptions::NonGC)
1948  return;
1950  for (auto *Prop : IDecl->properties())
1951  PM[std::make_pair(Prop->getIdentifier(), Prop->isClassProperty())] = Prop;
1952  for (const auto *Ext : IDecl->known_extensions())
1953  for (auto *Prop : Ext->properties())
1954  PM[std::make_pair(Prop->getIdentifier(), Prop->isClassProperty())] = Prop;
1955 
1956  for (ObjCContainerDecl::PropertyMap::iterator I = PM.begin(), E = PM.end();
1957  I != E; ++I) {
1958  const ObjCPropertyDecl *Property = I->second;
1959  ObjCMethodDecl *GetterMethod = nullptr;
1960  ObjCMethodDecl *SetterMethod = nullptr;
1961  bool LookedUpGetterSetter = false;
1962 
1963  unsigned Attributes = Property->getPropertyAttributes();
1964  unsigned AttributesAsWritten = Property->getPropertyAttributesAsWritten();
1965 
1966  if (!(AttributesAsWritten & ObjCPropertyDecl::OBJC_PR_atomic) &&
1967  !(AttributesAsWritten & ObjCPropertyDecl::OBJC_PR_nonatomic)) {
1968  GetterMethod = Property->isClassProperty() ?
1969  IMPDecl->getClassMethod(Property->getGetterName()) :
1970  IMPDecl->getInstanceMethod(Property->getGetterName());
1971  SetterMethod = Property->isClassProperty() ?
1972  IMPDecl->getClassMethod(Property->getSetterName()) :
1973  IMPDecl->getInstanceMethod(Property->getSetterName());
1974  LookedUpGetterSetter = true;
1975  if (GetterMethod) {
1976  Diag(GetterMethod->getLocation(),
1977  diag::warn_default_atomic_custom_getter_setter)
1978  << Property->getIdentifier() << 0;
1979  Diag(Property->getLocation(), diag::note_property_declare);
1980  }
1981  if (SetterMethod) {
1982  Diag(SetterMethod->getLocation(),
1983  diag::warn_default_atomic_custom_getter_setter)
1984  << Property->getIdentifier() << 1;
1985  Diag(Property->getLocation(), diag::note_property_declare);
1986  }
1987  }
1988 
1989  // We only care about readwrite atomic property.
1990  if ((Attributes & ObjCPropertyDecl::OBJC_PR_nonatomic) ||
1991  !(Attributes & ObjCPropertyDecl::OBJC_PR_readwrite))
1992  continue;
1993  if (const ObjCPropertyImplDecl *PIDecl = IMPDecl->FindPropertyImplDecl(
1994  Property->getIdentifier(), Property->getQueryKind())) {
1995  if (PIDecl->getPropertyImplementation() == ObjCPropertyImplDecl::Dynamic)
1996  continue;
1997  if (!LookedUpGetterSetter) {
1998  GetterMethod = Property->isClassProperty() ?
1999  IMPDecl->getClassMethod(Property->getGetterName()) :
2000  IMPDecl->getInstanceMethod(Property->getGetterName());
2001  SetterMethod = Property->isClassProperty() ?
2002  IMPDecl->getClassMethod(Property->getSetterName()) :
2003  IMPDecl->getInstanceMethod(Property->getSetterName());
2004  }
2005  if ((GetterMethod && !SetterMethod) || (!GetterMethod && SetterMethod)) {
2006  SourceLocation MethodLoc =
2007  (GetterMethod ? GetterMethod->getLocation()
2008  : SetterMethod->getLocation());
2009  Diag(MethodLoc, diag::warn_atomic_property_rule)
2010  << Property->getIdentifier() << (GetterMethod != nullptr)
2011  << (SetterMethod != nullptr);
2012  // fixit stuff.
2013  if (Property->getLParenLoc().isValid() &&
2014  !(AttributesAsWritten & ObjCPropertyDecl::OBJC_PR_atomic)) {
2015  // @property () ... case.
2016  SourceLocation AfterLParen =
2017  getLocForEndOfToken(Property->getLParenLoc());
2018  StringRef NonatomicStr = AttributesAsWritten? "nonatomic, "
2019  : "nonatomic";
2020  Diag(Property->getLocation(),
2021  diag::note_atomic_property_fixup_suggest)
2022  << FixItHint::CreateInsertion(AfterLParen, NonatomicStr);
2023  } else if (Property->getLParenLoc().isInvalid()) {
2024  //@property id etc.
2025  SourceLocation startLoc =
2026  Property->getTypeSourceInfo()->getTypeLoc().getBeginLoc();
2027  Diag(Property->getLocation(),
2028  diag::note_atomic_property_fixup_suggest)
2029  << FixItHint::CreateInsertion(startLoc, "(nonatomic) ");
2030  }
2031  else
2032  Diag(MethodLoc, diag::note_atomic_property_fixup_suggest);
2033  Diag(Property->getLocation(), diag::note_property_declare);
2034  }
2035  }
2036  }
2037 }
2038 
2040  if (getLangOpts().getGC() == LangOptions::GCOnly)
2041  return;
2042 
2043  for (const auto *PID : D->property_impls()) {
2044  const ObjCPropertyDecl *PD = PID->getPropertyDecl();
2045  if (PD && !PD->hasAttr<NSReturnsNotRetainedAttr>() &&
2046  !PD->isClassProperty() &&
2047  !D->getInstanceMethod(PD->getGetterName())) {
2048  ObjCMethodDecl *method = PD->getGetterMethodDecl();
2049  if (!method)
2050  continue;
2051  ObjCMethodFamily family = method->getMethodFamily();
2052  if (family == OMF_alloc || family == OMF_copy ||
2053  family == OMF_mutableCopy || family == OMF_new) {
2054  if (getLangOpts().ObjCAutoRefCount)
2055  Diag(PD->getLocation(), diag::err_cocoa_naming_owned_rule);
2056  else
2057  Diag(PD->getLocation(), diag::warn_cocoa_naming_owned_rule);
2058 
2059  // Look for a getter explicitly declared alongside the property.
2060  // If we find one, use its location for the note.
2061  SourceLocation noteLoc = PD->getLocation();
2062  SourceLocation fixItLoc;
2063  for (auto *getterRedecl : method->redecls()) {
2064  if (getterRedecl->isImplicit())
2065  continue;
2066  if (getterRedecl->getDeclContext() != PD->getDeclContext())
2067  continue;
2068  noteLoc = getterRedecl->getLocation();
2069  fixItLoc = getterRedecl->getLocEnd();
2070  }
2071 
2073  TokenValue tokens[] = {
2074  tok::kw___attribute, tok::l_paren, tok::l_paren,
2075  PP.getIdentifierInfo("objc_method_family"), tok::l_paren,
2076  PP.getIdentifierInfo("none"), tok::r_paren,
2077  tok::r_paren, tok::r_paren
2078  };
2079  StringRef spelling = "__attribute__((objc_method_family(none)))";
2080  StringRef macroName = PP.getLastMacroWithSpelling(noteLoc, tokens);
2081  if (!macroName.empty())
2082  spelling = macroName;
2083 
2084  auto noteDiag = Diag(noteLoc, diag::note_cocoa_naming_declare_family)
2085  << method->getDeclName() << spelling;
2086  if (fixItLoc.isValid()) {
2087  SmallString<64> fixItText(" ");
2088  fixItText += spelling;
2089  noteDiag << FixItHint::CreateInsertion(fixItLoc, fixItText);
2090  }
2091  }
2092  }
2093  }
2094 }
2095 
2097  const ObjCImplementationDecl *ImplD,
2098  const ObjCInterfaceDecl *IFD) {
2099  assert(IFD->hasDesignatedInitializers());
2100  const ObjCInterfaceDecl *SuperD = IFD->getSuperClass();
2101  if (!SuperD)
2102  return;
2103 
2104  SelectorSet InitSelSet;
2105  for (const auto *I : ImplD->instance_methods())
2106  if (I->getMethodFamily() == OMF_init)
2107  InitSelSet.insert(I->getSelector());
2108 
2110  SuperD->getDesignatedInitializers(DesignatedInits);
2112  I = DesignatedInits.begin(), E = DesignatedInits.end(); I != E; ++I) {
2113  const ObjCMethodDecl *MD = *I;
2114  if (!InitSelSet.count(MD->getSelector())) {
2115  bool Ignore = false;
2116  if (auto *IMD = IFD->getInstanceMethod(MD->getSelector())) {
2117  Ignore = IMD->isUnavailable();
2118  }
2119  if (!Ignore) {
2120  Diag(ImplD->getLocation(),
2121  diag::warn_objc_implementation_missing_designated_init_override)
2122  << MD->getSelector();
2123  Diag(MD->getLocation(), diag::note_objc_designated_init_marked_here);
2124  }
2125  }
2126  }
2127 }
2128 
2129 /// AddPropertyAttrs - Propagates attributes from a property to the
2130 /// implicitly-declared getter or setter for that property.
2131 static void AddPropertyAttrs(Sema &S, ObjCMethodDecl *PropertyMethod,
2133  // Should we just clone all attributes over?
2134  for (const auto *A : Property->attrs()) {
2135  if (isa<DeprecatedAttr>(A) ||
2136  isa<UnavailableAttr>(A) ||
2137  isa<AvailabilityAttr>(A))
2138  PropertyMethod->addAttr(A->clone(S.Context));
2139  }
2140 }
2141 
2142 /// ProcessPropertyDecl - Make sure that any user-defined setter/getter methods
2143 /// have the property type and issue diagnostics if they don't.
2144 /// Also synthesize a getter/setter method if none exist (and update the
2145 /// appropriate lookup tables.
2147  ObjCMethodDecl *GetterMethod, *SetterMethod;
2148  ObjCContainerDecl *CD = cast<ObjCContainerDecl>(property->getDeclContext());
2149  if (CD->isInvalidDecl())
2150  return;
2151 
2152  bool IsClassProperty = property->isClassProperty();
2153  GetterMethod = IsClassProperty ?
2154  CD->getClassMethod(property->getGetterName()) :
2155  CD->getInstanceMethod(property->getGetterName());
2156 
2157  // if setter or getter is not found in class extension, it might be
2158  // in the primary class.
2159  if (!GetterMethod)
2160  if (const ObjCCategoryDecl *CatDecl = dyn_cast<ObjCCategoryDecl>(CD))
2161  if (CatDecl->IsClassExtension())
2162  GetterMethod = IsClassProperty ? CatDecl->getClassInterface()->
2163  getClassMethod(property->getGetterName()) :
2164  CatDecl->getClassInterface()->
2165  getInstanceMethod(property->getGetterName());
2166 
2167  SetterMethod = IsClassProperty ?
2168  CD->getClassMethod(property->getSetterName()) :
2169  CD->getInstanceMethod(property->getSetterName());
2170  if (!SetterMethod)
2171  if (const ObjCCategoryDecl *CatDecl = dyn_cast<ObjCCategoryDecl>(CD))
2172  if (CatDecl->IsClassExtension())
2173  SetterMethod = IsClassProperty ? CatDecl->getClassInterface()->
2174  getClassMethod(property->getSetterName()) :
2175  CatDecl->getClassInterface()->
2176  getInstanceMethod(property->getSetterName());
2177  DiagnosePropertyAccessorMismatch(property, GetterMethod,
2178  property->getLocation());
2179 
2180  if (SetterMethod) {
2182  property->getPropertyAttributes();
2183  if ((!(CAttr & ObjCPropertyDecl::OBJC_PR_readonly)) &&
2184  Context.getCanonicalType(SetterMethod->getReturnType()) !=
2185  Context.VoidTy)
2186  Diag(SetterMethod->getLocation(), diag::err_setter_type_void);
2187  if (SetterMethod->param_size() != 1 ||
2189  (*SetterMethod->param_begin())->getType().getNonReferenceType(),
2190  property->getType().getNonReferenceType())) {
2191  Diag(property->getLocation(),
2192  diag::warn_accessor_property_type_mismatch)
2193  << property->getDeclName()
2194  << SetterMethod->getSelector();
2195  Diag(SetterMethod->getLocation(), diag::note_declared_at);
2196  }
2197  }
2198 
2199  // Synthesize getter/setter methods if none exist.
2200  // Find the default getter and if one not found, add one.
2201  // FIXME: The synthesized property we set here is misleading. We almost always
2202  // synthesize these methods unless the user explicitly provided prototypes
2203  // (which is odd, but allowed). Sema should be typechecking that the
2204  // declarations jive in that situation (which it is not currently).
2205  if (!GetterMethod) {
2206  // No instance/class method of same name as property getter name was found.
2207  // Declare a getter method and add it to the list of methods
2208  // for this class.
2209  SourceLocation Loc = property->getLocation();
2210 
2211  // The getter returns the declared property type with all qualifiers
2212  // removed.
2213  QualType resultTy = property->getType().getAtomicUnqualifiedType();
2214 
2215  // If the property is null_resettable, the getter returns nonnull.
2216  if (property->getPropertyAttributes() &
2218  QualType modifiedTy = resultTy;
2219  if (auto nullability = AttributedType::stripOuterNullability(modifiedTy)) {
2220  if (*nullability == NullabilityKind::Unspecified)
2222  modifiedTy, modifiedTy);
2223  }
2224  }
2225 
2226  GetterMethod = ObjCMethodDecl::Create(Context, Loc, Loc,
2227  property->getGetterName(),
2228  resultTy, nullptr, CD,
2229  !IsClassProperty, /*isVariadic=*/false,
2230  /*isPropertyAccessor=*/true,
2231  /*isImplicitlyDeclared=*/true, /*isDefined=*/false,
2232  (property->getPropertyImplementation() ==
2236  CD->addDecl(GetterMethod);
2237 
2238  AddPropertyAttrs(*this, GetterMethod, property);
2239 
2240  if (property->hasAttr<NSReturnsNotRetainedAttr>())
2241  GetterMethod->addAttr(NSReturnsNotRetainedAttr::CreateImplicit(Context,
2242  Loc));
2243 
2244  if (property->hasAttr<ObjCReturnsInnerPointerAttr>())
2245  GetterMethod->addAttr(
2246  ObjCReturnsInnerPointerAttr::CreateImplicit(Context, Loc));
2247 
2248  if (const SectionAttr *SA = property->getAttr<SectionAttr>())
2249  GetterMethod->addAttr(
2250  SectionAttr::CreateImplicit(Context, SectionAttr::GNU_section,
2251  SA->getName(), Loc));
2252 
2253  if (getLangOpts().ObjCAutoRefCount)
2254  CheckARCMethodDecl(GetterMethod);
2255  } else
2256  // A user declared getter will be synthesize when @synthesize of
2257  // the property with the same name is seen in the @implementation
2258  GetterMethod->setPropertyAccessor(true);
2259  property->setGetterMethodDecl(GetterMethod);
2260 
2261  // Skip setter if property is read-only.
2262  if (!property->isReadOnly()) {
2263  // Find the default setter and if one not found, add one.
2264  if (!SetterMethod) {
2265  // No instance/class method of same name as property setter name was
2266  // found.
2267  // Declare a setter method and add it to the list of methods
2268  // for this class.
2269  SourceLocation Loc = property->getLocation();
2270 
2271  SetterMethod =
2272  ObjCMethodDecl::Create(Context, Loc, Loc,
2273  property->getSetterName(), Context.VoidTy,
2274  nullptr, CD, !IsClassProperty,
2275  /*isVariadic=*/false,
2276  /*isPropertyAccessor=*/true,
2277  /*isImplicitlyDeclared=*/true,
2278  /*isDefined=*/false,
2279  (property->getPropertyImplementation() ==
2283 
2284  // Remove all qualifiers from the setter's parameter type.
2285  QualType paramTy =
2286  property->getType().getUnqualifiedType().getAtomicUnqualifiedType();
2287 
2288  // If the property is null_resettable, the setter accepts a
2289  // nullable value.
2290  if (property->getPropertyAttributes() &
2292  QualType modifiedTy = paramTy;
2293  if (auto nullability = AttributedType::stripOuterNullability(modifiedTy)){
2294  if (*nullability == NullabilityKind::Unspecified)
2296  modifiedTy, modifiedTy);
2297  }
2298  }
2299 
2300  // Invent the arguments for the setter. We don't bother making a
2301  // nice name for the argument.
2302  ParmVarDecl *Argument = ParmVarDecl::Create(Context, SetterMethod,
2303  Loc, Loc,
2304  property->getIdentifier(),
2305  paramTy,
2306  /*TInfo=*/nullptr,
2307  SC_None,
2308  nullptr);
2309  SetterMethod->setMethodParams(Context, Argument, None);
2310 
2311  AddPropertyAttrs(*this, SetterMethod, property);
2312 
2313  CD->addDecl(SetterMethod);
2314  if (const SectionAttr *SA = property->getAttr<SectionAttr>())
2315  SetterMethod->addAttr(
2316  SectionAttr::CreateImplicit(Context, SectionAttr::GNU_section,
2317  SA->getName(), Loc));
2318  // It's possible for the user to have set a very odd custom
2319  // setter selector that causes it to have a method family.
2320  if (getLangOpts().ObjCAutoRefCount)
2321  CheckARCMethodDecl(SetterMethod);
2322  } else
2323  // A user declared setter will be synthesize when @synthesize of
2324  // the property with the same name is seen in the @implementation
2325  SetterMethod->setPropertyAccessor(true);
2326  property->setSetterMethodDecl(SetterMethod);
2327  }
2328  // Add any synthesized methods to the global pool. This allows us to
2329  // handle the following, which is supported by GCC (and part of the design).
2330  //
2331  // @interface Foo
2332  // @property double bar;
2333  // @end
2334  //
2335  // void thisIsUnfortunate() {
2336  // id foo;
2337  // double bar = [foo bar];
2338  // }
2339  //
2340  if (!IsClassProperty) {
2341  if (GetterMethod)
2342  AddInstanceMethodToGlobalPool(GetterMethod);
2343  if (SetterMethod)
2344  AddInstanceMethodToGlobalPool(SetterMethod);
2345  } else {
2346  if (GetterMethod)
2347  AddFactoryMethodToGlobalPool(GetterMethod);
2348  if (SetterMethod)
2349  AddFactoryMethodToGlobalPool(SetterMethod);
2350  }
2351 
2352  ObjCInterfaceDecl *CurrentClass = dyn_cast<ObjCInterfaceDecl>(CD);
2353  if (!CurrentClass) {
2354  if (ObjCCategoryDecl *Cat = dyn_cast<ObjCCategoryDecl>(CD))
2355  CurrentClass = Cat->getClassInterface();
2356  else if (ObjCImplDecl *Impl = dyn_cast<ObjCImplDecl>(CD))
2357  CurrentClass = Impl->getClassInterface();
2358  }
2359  if (GetterMethod)
2360  CheckObjCMethodOverrides(GetterMethod, CurrentClass, Sema::RTC_Unknown);
2361  if (SetterMethod)
2362  CheckObjCMethodOverrides(SetterMethod, CurrentClass, Sema::RTC_Unknown);
2363 }
2364 
2366  SourceLocation Loc,
2367  unsigned &Attributes,
2368  bool propertyInPrimaryClass) {
2369  // FIXME: Improve the reported location.
2370  if (!PDecl || PDecl->isInvalidDecl())
2371  return;
2372 
2373  if ((Attributes & ObjCDeclSpec::DQ_PR_readonly) &&
2374  (Attributes & ObjCDeclSpec::DQ_PR_readwrite))
2375  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2376  << "readonly" << "readwrite";
2377 
2378  ObjCPropertyDecl *PropertyDecl = cast<ObjCPropertyDecl>(PDecl);
2379  QualType PropertyTy = PropertyDecl->getType();
2380 
2381  // Check for copy or retain on non-object types.
2382  if ((Attributes & (ObjCDeclSpec::DQ_PR_weak | ObjCDeclSpec::DQ_PR_copy |
2384  !PropertyTy->isObjCRetainableType() &&
2385  !PropertyDecl->hasAttr<ObjCNSObjectAttr>()) {
2386  Diag(Loc, diag::err_objc_property_requires_object)
2387  << (Attributes & ObjCDeclSpec::DQ_PR_weak ? "weak" :
2388  Attributes & ObjCDeclSpec::DQ_PR_copy ? "copy" : "retain (or strong)");
2391  PropertyDecl->setInvalidDecl();
2392  }
2393 
2394  // Check for more than one of { assign, copy, retain }.
2395  if (Attributes & ObjCDeclSpec::DQ_PR_assign) {
2396  if (Attributes & ObjCDeclSpec::DQ_PR_copy) {
2397  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2398  << "assign" << "copy";
2399  Attributes &= ~ObjCDeclSpec::DQ_PR_copy;
2400  }
2401  if (Attributes & ObjCDeclSpec::DQ_PR_retain) {
2402  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2403  << "assign" << "retain";
2404  Attributes &= ~ObjCDeclSpec::DQ_PR_retain;
2405  }
2406  if (Attributes & ObjCDeclSpec::DQ_PR_strong) {
2407  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2408  << "assign" << "strong";
2409  Attributes &= ~ObjCDeclSpec::DQ_PR_strong;
2410  }
2411  if (getLangOpts().ObjCAutoRefCount &&
2412  (Attributes & ObjCDeclSpec::DQ_PR_weak)) {
2413  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2414  << "assign" << "weak";
2415  Attributes &= ~ObjCDeclSpec::DQ_PR_weak;
2416  }
2417  if (PropertyDecl->hasAttr<IBOutletCollectionAttr>())
2418  Diag(Loc, diag::warn_iboutletcollection_property_assign);
2419  } else if (Attributes & ObjCDeclSpec::DQ_PR_unsafe_unretained) {
2420  if (Attributes & ObjCDeclSpec::DQ_PR_copy) {
2421  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2422  << "unsafe_unretained" << "copy";
2423  Attributes &= ~ObjCDeclSpec::DQ_PR_copy;
2424  }
2425  if (Attributes & ObjCDeclSpec::DQ_PR_retain) {
2426  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2427  << "unsafe_unretained" << "retain";
2428  Attributes &= ~ObjCDeclSpec::DQ_PR_retain;
2429  }
2430  if (Attributes & ObjCDeclSpec::DQ_PR_strong) {
2431  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2432  << "unsafe_unretained" << "strong";
2433  Attributes &= ~ObjCDeclSpec::DQ_PR_strong;
2434  }
2435  if (getLangOpts().ObjCAutoRefCount &&
2436  (Attributes & ObjCDeclSpec::DQ_PR_weak)) {
2437  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2438  << "unsafe_unretained" << "weak";
2439  Attributes &= ~ObjCDeclSpec::DQ_PR_weak;
2440  }
2441  } else if (Attributes & ObjCDeclSpec::DQ_PR_copy) {
2442  if (Attributes & ObjCDeclSpec::DQ_PR_retain) {
2443  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2444  << "copy" << "retain";
2445  Attributes &= ~ObjCDeclSpec::DQ_PR_retain;
2446  }
2447  if (Attributes & ObjCDeclSpec::DQ_PR_strong) {
2448  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2449  << "copy" << "strong";
2450  Attributes &= ~ObjCDeclSpec::DQ_PR_strong;
2451  }
2452  if (Attributes & ObjCDeclSpec::DQ_PR_weak) {
2453  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2454  << "copy" << "weak";
2455  Attributes &= ~ObjCDeclSpec::DQ_PR_weak;
2456  }
2457  }
2458  else if ((Attributes & ObjCDeclSpec::DQ_PR_retain) &&
2459  (Attributes & ObjCDeclSpec::DQ_PR_weak)) {
2460  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2461  << "retain" << "weak";
2462  Attributes &= ~ObjCDeclSpec::DQ_PR_retain;
2463  }
2464  else if ((Attributes & ObjCDeclSpec::DQ_PR_strong) &&
2465  (Attributes & ObjCDeclSpec::DQ_PR_weak)) {
2466  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2467  << "strong" << "weak";
2468  Attributes &= ~ObjCDeclSpec::DQ_PR_weak;
2469  }
2470 
2471  if (Attributes & ObjCDeclSpec::DQ_PR_weak) {
2472  // 'weak' and 'nonnull' are mutually exclusive.
2473  if (auto nullability = PropertyTy->getNullability(Context)) {
2474  if (*nullability == NullabilityKind::NonNull)
2475  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2476  << "nonnull" << "weak";
2477  }
2478  }
2479 
2480  if ((Attributes & ObjCDeclSpec::DQ_PR_atomic) &&
2481  (Attributes & ObjCDeclSpec::DQ_PR_nonatomic)) {
2482  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2483  << "atomic" << "nonatomic";
2484  Attributes &= ~ObjCDeclSpec::DQ_PR_atomic;
2485  }
2486 
2487  // Warn if user supplied no assignment attribute, property is
2488  // readwrite, and this is an object type.
2489  if (!getOwnershipRule(Attributes) && PropertyTy->isObjCRetainableType()) {
2490  if (Attributes & ObjCDeclSpec::DQ_PR_readonly) {
2491  // do nothing
2492  } else if (getLangOpts().ObjCAutoRefCount) {
2493  // With arc, @property definitions should default to strong when
2494  // not specified.
2496  } else if (PropertyTy->isObjCObjectPointerType()) {
2497  bool isAnyClassTy =
2498  (PropertyTy->isObjCClassType() ||
2499  PropertyTy->isObjCQualifiedClassType());
2500  // In non-gc, non-arc mode, 'Class' is treated as a 'void *' no need to
2501  // issue any warning.
2502  if (isAnyClassTy && getLangOpts().getGC() == LangOptions::NonGC)
2503  ;
2504  else if (propertyInPrimaryClass) {
2505  // Don't issue warning on property with no life time in class
2506  // extension as it is inherited from property in primary class.
2507  // Skip this warning in gc-only mode.
2508  if (getLangOpts().getGC() != LangOptions::GCOnly)
2509  Diag(Loc, diag::warn_objc_property_no_assignment_attribute);
2510 
2511  // If non-gc code warn that this is likely inappropriate.
2512  if (getLangOpts().getGC() == LangOptions::NonGC)
2513  Diag(Loc, diag::warn_objc_property_default_assign_on_object);
2514  }
2515  }
2516 
2517  // FIXME: Implement warning dependent on NSCopying being
2518  // implemented. See also:
2519  // <rdar://5168496&4855821&5607453&5096644&4947311&5698469&4947014&5168496>
2520  // (please trim this list while you are at it).
2521  }
2522 
2523  if (!(Attributes & ObjCDeclSpec::DQ_PR_copy)
2524  &&!(Attributes & ObjCDeclSpec::DQ_PR_readonly)
2525  && getLangOpts().getGC() == LangOptions::GCOnly
2526  && PropertyTy->isBlockPointerType())
2527  Diag(Loc, diag::warn_objc_property_copy_missing_on_block);
2528  else if ((Attributes & ObjCDeclSpec::DQ_PR_retain) &&
2529  !(Attributes & ObjCDeclSpec::DQ_PR_readonly) &&
2530  !(Attributes & ObjCDeclSpec::DQ_PR_strong) &&
2531  PropertyTy->isBlockPointerType())
2532  Diag(Loc, diag::warn_objc_property_retain_of_block);
2533 
2534  if ((Attributes & ObjCDeclSpec::DQ_PR_readonly) &&
2535  (Attributes & ObjCDeclSpec::DQ_PR_setter))
2536  Diag(Loc, diag::warn_objc_readonly_property_has_setter);
2537 }
A call to an overloaded operator written using operator syntax.
Definition: ExprCXX.h:52
SourceLocation getLocForStartOfFile(FileID FID) const
Return the source location corresponding to the first byte of the specified file. ...
ObjCPropertyQueryKind getQueryKind() const
Definition: DeclObjC.h:833
bool RequireNonAbstractType(SourceLocation Loc, QualType T, TypeDiagnoser &Diagnoser)
FunctionDecl - An instance of this class is created to represent a function declaration or definition...
Definition: Decl.h:1586
Lexer - This provides a simple interface that turns a text buffer into a stream of tokens...
Definition: Lexer.h:46
SourceLocation getLocWithOffset(int Offset) const
Return a source location with the specified offset from this SourceLocation.
protocol_range protocols() const
Definition: DeclObjC.h:1284
Smart pointer class that efficiently represents Objective-C method names.
A (possibly-)qualified type.
Definition: Type.h:599
ObjCInterfaceDecl * getClassInterface()
Definition: DeclObjC.h:2220
all_protocol_range all_referenced_protocols() const
Definition: DeclObjC.h:1339
ObjCInterfaceDecl * getClassInterface()
Definition: DeclObjC.cpp:1080
bool IvarBacksCurrentMethodAccessor(ObjCInterfaceDecl *IFace, ObjCMethodDecl *Method, ObjCIvarDecl *IV)
IvarBacksCurrentMethodAccessor - This routine returns &#39;true&#39; if &#39;IV&#39; is an ivar synthesized for &#39;Meth...
IdentifierInfo * getIdentifierInfo(StringRef Name) const
Return information about the specified preprocessor identifier token.
Definition: Preprocessor.h:936
bool isObjCPointerConversion(QualType FromType, QualType ToType, QualType &ConvertedType, bool &IncompatibleObjC)
isObjCPointerConversion - Determines whether this is an Objective-C pointer conversion.
bool isArithmeticType() const
Definition: Type.cpp:1847
llvm::DenseMap< std::pair< IdentifierInfo *, unsigned >, ObjCPropertyDecl * > PropertyMap
Definition: DeclObjC.h:1029
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:11180
void setObjCLifetime(ObjCLifetime type)
Definition: Type.h:312
static void CollectSuperClassPropertyImplementations(ObjCInterfaceDecl *CDecl, ObjCInterfaceDecl::PropertyMap &PropMap)
CollectSuperClassPropertyImplementations - This routine collects list of properties to be implemented...
bool isRecordType() const
Definition: Type.h:5646
QualType getQualifiedType(SplitQualType split) const
Un-split a SplitQualType.
Definition: ASTContext.h:1781
SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID)
Emit a diagnostic.
Definition: Sema.h:1156
void DiagnoseMissingDesignatedInitOverrides(const ObjCImplementationDecl *ImplD, const ObjCInterfaceDecl *IFD)
void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, SourceLocation Loc, unsigned &Attributes, bool propertyInPrimaryClass)
Ensure attributes are consistent with type.
Captures information about "declaration specifiers" specific to Objective-C.
Definition: DeclSpec.h:778
StringRef P
QualType getNonReferenceType() const
If Type is a reference type (e.g., const int&), returns the type that the reference refers to ("const...
Definition: Type.h:5539
static ObjCPropertyDecl * Create(ASTContext &C, DeclContext *DC, SourceLocation L, IdentifierInfo *Id, SourceLocation AtLocation, SourceLocation LParenLocation, QualType T, TypeSourceInfo *TSI, PropertyControl propControl=None)
Definition: DeclObjC.cpp:2173
void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false)
AddFactoryMethodToGlobalPool - Same as above, but for factory methods.
Definition: Sema.h:3392
CanQual< T > getUnqualifiedType() const
Retrieve the unqualified form of this type.
StringRef getLastMacroWithSpelling(SourceLocation Loc, ArrayRef< TokenValue > Tokens) const
Return the name of the macro defined before Loc that has spelling Tokens.
void MarkDeclRefReferenced(DeclRefExpr *E)
Perform reference-marking and odr-use handling for a DeclRefExpr.
Definition: SemaExpr.cpp:14312
SourceLocation getLocForEndOfToken(SourceLocation Loc, unsigned Offset=0)
Calls Lexer::getLocForEndOfToken()
Definition: Sema.cpp:45
A container of type source information.
Definition: Decl.h:62
void ProcessPropertyDecl(ObjCPropertyDecl *property)
Process the specified property declaration and create decls for the setters and getters as needed...
void setPropertyAccessor(bool isAccessor)
Definition: DeclObjC.h:422
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:673
const T * getAs() const
Member-template getAs<specific type>&#39;.
Definition: Type.h:5923
llvm::DenseMap< const ObjCProtocolDecl *, ObjCPropertyDecl * > ProtocolPropertyMap
Definition: DeclObjC.h:1032
static unsigned getOwnershipRule(unsigned attr)
ObjCMethodDecl - Represents an instance or class method declaration.
Definition: DeclObjC.h:113
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:1645
static InitializedEntity InitializeResult(SourceLocation ReturnLoc, QualType Type, bool NRVO)
Create the initialization entity for the result of a function.
static ObjCPropertyDecl * findPropertyDecl(const DeclContext *DC, const IdentifierInfo *propertyID, ObjCPropertyQueryKind queryKind)
Lookup a property by name in the specified DeclContext.
Definition: DeclObjC.cpp:154
protocol_range protocols() const
Definition: DeclObjC.h:2031
ParmVarDecl - Represents a parameter to a function.
Definition: Decl.h:1402
Defines the clang::Expr interface and subclasses for C++ expressions.
The collection of all-type qualifiers we support.
Definition: Type.h:118
IdentifierInfo * getIdentifier() const
getIdentifier - Get the identifier that names this declaration, if there is one.
Definition: Decl.h:232
static void CollectImmediateProperties(ObjCContainerDecl *CDecl, ObjCContainerDecl::PropertyMap &PropMap, ObjCContainerDecl::PropertyMap &SuperPropMap, bool CollectClassPropsOnly=false, bool IncludeProtocols=true)
CollectImmediateProperties - This routine collects all properties in the class and its conforming pro...
DeclarationName getDeclName() const
getDeclName - Get the actual, stored name of the declaration, which may be a special name...
Definition: Decl.h:258
instprop_range instance_properties() const
Definition: DeclObjC.h:940
One of these records is kept for each identifier that is lexed.
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:126
The results of name lookup within a DeclContext.
Definition: DeclBase.h:1078
ObjCMethodDecl * getClassMethod(Selector Sel, bool AllowHidden=false) const
Definition: DeclObjC.h:1017
ObjCMethodFamily
A family of Objective-C methods.
instmeth_range instance_methods() const
Definition: DeclObjC.h:985
method_range methods() const
Definition: DeclObjC.h:970
Token - This structure provides full information about a lexed token.
Definition: Token.h:35
prop_range properties() const
Definition: DeclObjC.h:927
int Category
Definition: Format.cpp:1236
IdentifierTable & Idents
Definition: ASTContext.h:505
This little struct is used to capture information about structure field declarators, which is basically just a bitfield size.
Definition: DeclSpec.h:2415
An r-value expression (a pr-value in the C++11 taxonomy) produces a temporary value.
Definition: Specifiers.h:105
bool isClassProperty() const
Definition: DeclObjC.h:832
ObjCMethodFamily getMethodFamily() const
Determines the family of this method.
Definition: DeclObjC.cpp:922
void collectPropertiesToImplement(PropertyMap &PM, PropertyDeclOrder &PO) const override
This routine collects list of properties to be implemented in the class.
Definition: DeclObjC.cpp:370
void setObjCWeakProperty(bool Val=true)
Definition: DeclSpec.h:2365
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:907
static ObjCPropertyImplDecl * Create(ASTContext &C, DeclContext *DC, SourceLocation atLoc, SourceLocation L, ObjCPropertyDecl *property, Kind PK, ObjCIvarDecl *ivarDecl, SourceLocation ivarLoc)
Definition: DeclObjC.cpp:2201
AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, QualType LHSType, QualType RHSType)
CheckAssignmentConstraints - Perform type checking for assignment, argument passing, variable initialization, and function return values.
Definition: SemaExpr.cpp:7444
Whether values of this type can be null is (explicitly) unspecified.
PropertyAttributeKind getPropertyAttributes() const
Definition: DeclObjC.h:795
const ObjCInterfaceDecl * isObjCRequiresPropertyDefs() const
isObjCRequiresPropertyDefs - Checks that a class or one of its super classes must not be auto-synthes...
Definition: DeclObjC.cpp:400
static void DiagnoseUnimplementedAccessor(Sema &S, ObjCInterfaceDecl *PrimaryClass, Selector Method, ObjCImplDecl *IMPDecl, ObjCContainerDecl *CDecl, ObjCCategoryDecl *C, ObjCPropertyDecl *Prop, llvm::SmallPtrSet< const ObjCMethodDecl *, 8 > &SMap)
bool isReadOnly() const
isReadOnly - Return true iff the property has a setter.
Definition: DeclObjC.h:816
Values of this type can never be null.
ObjCProtocolDecl * getDefinition()
Retrieve the definition of this protocol, if any.
Definition: DeclObjC.h:2104
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:1050
Represents an Objective-C protocol declaration.
Definition: DeclObjC.h:1974
Preprocessor & PP
Definition: Sema.h:302
const LangOptions & getLangOpts() const
Definition: Sema.h:1079
PropertyControl getPropertyImplementation() const
Definition: DeclObjC.h:873
Represents an ObjC class declaration.
Definition: DeclObjC.h:1097
QualType getReturnType() const
Definition: DeclObjC.h:330
IdentifierInfo * getIdentifier() const
Definition: DeclSpec.h:2113
const LangOptions & LangOpts
Definition: Sema.h:301
This object can be modified without requiring retains or releases.
Definition: Type.h:139
void AtomicPropertySetterGetterRules(ObjCImplDecl *IMPDecl, ObjCInterfaceDecl *IDecl)
AtomicPropertySetterGetterRules - This routine enforces the rule (via warning) when atomic property h...
void setGetterCXXConstructor(Expr *getterCXXConstructor)
Definition: DeclObjC.h:2752
void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false)
AddInstanceMethodToGlobalPool - All instance methods in a translation unit are added to a global pool...
Definition: Sema.h:3387
lookup_result lookup(DeclarationName Name) const
lookup - Find the declarations (if any) with the given Name in this context.
Definition: DeclBase.cpp:1453
void CheckObjCMethodOverrides(ObjCMethodDecl *ObjCMethod, ObjCInterfaceDecl *CurrentClass, ResultTypeCompatibilityKind RTC)
ObjCPropertyImplDecl - Represents implementation declaration of a property in a class or category imp...
Definition: DeclObjC.h:2661
Sema - This implements semantic analysis and AST building for C.
Definition: Sema.h:267
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:3209
static ImplicitCastExpr * Create(const ASTContext &Context, QualType T, CastKind Kind, Expr *Operand, const CXXCastPath *BasePath, ExprValueKind Cat)
Definition: Expr.cpp:1689
void addObjCLifetime(ObjCLifetime type)
Definition: Type.h:316
QualType getUsageType(QualType objectType) const
Retrieve the type of this instance variable when viewed as a member of a specific object type...
Definition: DeclObjC.cpp:1756
TypeSourceInfo * getTrivialTypeSourceInfo(QualType T, SourceLocation Loc=SourceLocation()) const
Allocate a TypeSourceInfo where all locations have been initialized to a given location, which defaults to the empty location.
ID
Defines the set of possible language-specific address spaces.
Definition: AddressSpaces.h:27
SourceLocation getBeginLoc() const
Get the begin source location.
Definition: TypeLoc.cpp:169
bool isObjCGCStrong() const
true when Type is objc&#39;s strong.
Definition: Type.h:1006
Expr - This represents one expression.
Definition: Expr.h:105
known_extensions_range known_extensions() const
Definition: DeclObjC.h:1669
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:750
Selector getSetterName() const
Definition: DeclObjC.h:860
bool HasUserDeclaredSetterMethod(const ObjCPropertyDecl *P) const
This routine returns &#39;true&#39; if a user declared setter method was found in the class, its protocols, its super classes or categories.
Definition: DeclObjC.cpp:101
IdentifierInfo * getDefaultSynthIvarName(ASTContext &Ctx) const
Get the default name of the synthesized ivar.
Definition: DeclObjC.cpp:202
bool isObjCARCImplicitlyUnretainedType() const
Determines if this type, which must satisfy isObjCLifetimeType(), is implicitly __unsafe_unretained r...
Definition: Type.cpp:3750
TypeSourceInfo * getTypeSourceInfo() const
Definition: DeclObjC.h:782
bool isObjCRetainableType() const
Definition: Type.cpp:3788
static ObjCPropertyDecl::PropertyAttributeKind makePropertyAttributesAsWritten(unsigned Attributes)
static bool hasWrittenStorageAttribute(ObjCPropertyDecl *Prop, ObjCPropertyQueryKind QueryKind)
Determine whether any storage attributes were written on the property.
Defines the clang::Preprocessor interface.
ParmVarDecl *const * param_iterator
Definition: DeclObjC.h:350
ObjCInterfaceDecl * getSuperClass() const
Definition: DeclObjC.cpp:314
Stores token information for comparing actual tokens with predefined values.
Definition: Preprocessor.h:65
ObjCPropertyDecl * FindPropertyVisibleInPrimaryClass(IdentifierInfo *PropertyId, ObjCPropertyQueryKind QueryKind) const
FindPropertyVisibleInPrimaryClass - Finds declaration of the property with name &#39;PropertyId&#39; in the p...
Definition: DeclObjC.cpp:346
bool RequireCompleteType(SourceLocation Loc, QualType T, TypeDiagnoser &Diagnoser)
Ensure that the type T is a complete type.
Definition: SemaType.cpp:7013
A std::pair-like structure for storing a qualified type split into its local qualifiers and its local...
Definition: Type.h:542
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:3700
ObjCIvarDecl * lookupInstanceVariable(IdentifierInfo *IVarName, ObjCInterfaceDecl *&ClassDeclared)
Definition: DeclObjC.cpp:591
clang::ObjCRuntime ObjCRuntime
Definition: LangOptions.h:99
propimpl_range property_impls() const
Definition: DeclObjC.h:2357
Qualifiers Quals
The local qualifiers.
Definition: Type.h:547
ObjCPropertyDecl * HandlePropertyInClassExtension(Scope *S, SourceLocation AtLoc, SourceLocation LParenLoc, FieldDeclarator &FD, Selector GetterSel, Selector SetterSel, 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 isInvalid() const
Definition: Ownership.h:159
bool isInstanceMethod() const
Definition: DeclObjC.h:414
Preprocessor & getPreprocessor() const
Definition: Sema.h:1085
Selector getSelector() const
Definition: DeclObjC.h:328
SourceLocation getLocEnd() const LLVM_READONLY
Definition: TypeLoc.h:131
QualType getType() const
Definition: DeclObjC.h:784
const SourceManager & SM
Definition: Format.cpp:1225
ObjCKeywordKind
Provides a namespace for Objective-C keywords which start with an &#39;@&#39;.
Definition: TokenKinds.h:41
void DefaultSynthesizeProperties(Scope *S, ObjCImplDecl *IMPDecl, ObjCInterfaceDecl *IDecl)
DefaultSynthesizeProperties - This routine default synthesizes all properties which must be synthesiz...
QualType getObjCGCQualType(QualType T, Qualifiers::GC gcAttr) const
Return the uniqued reference to the type for an Objective-C gc-qualified type.
SplitQualType split() const
Divides a QualType into its unqualified type and a set of local qualifiers.
Definition: Type.h:5374
There is no lifetime qualification on this type.
Definition: Type.h:135
void makeDeclVisibleInContext(NamedDecl *D)
Makes a declaration visible within this context.
Definition: DeclBase.cpp:1625
Assigning into this object requires the old value to be released and the new value to be retained...
Definition: Type.h:146
ActionResult - This structure is used while parsing/acting on expressions, stmts, etc...
Definition: Ownership.h:145
Encodes a location in the source.
bool getSynthesize() const
Definition: DeclObjC.h:1901
IdentifierInfo & get(StringRef Name)
Return the identifier token info for the specified named identifier.
ObjCPropertyQueryKind
Definition: DeclObjC.h:690
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:830
ObjCCategoryDecl - Represents a category declaration.
Definition: DeclObjC.h:2177
ObjCPropertyDecl * CreatePropertyDecl(Scope *S, ObjCContainerDecl *CDecl, SourceLocation AtLoc, SourceLocation LParenLoc, FieldDeclarator &FD, Selector GetterSel, Selector SetterSel, 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...
CanQualType VoidTy
Definition: ASTContext.h:951
IdentifierInfo * getIdentifier() const
getIdentifier - Get the identifier that names the category interface associated with this implementat...
Definition: DeclObjC.h:2418
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:702
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:1776
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:2050
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:721
Assigning into this object requires a lifetime extension.
Definition: Type.h:152
bool hasSameUnqualifiedType(QualType T1, QualType T2) const
Determine whether the given types are equivalent after cvr-qualifiers have been removed.
Definition: ASTContext.h:2100
void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D)
llvm::SmallVector< ObjCPropertyDecl *, 8 > PropertyDeclOrder
Definition: DeclObjC.h:1034
void setSetterCXXAssignment(Expr *setterCXXAssignment)
Definition: DeclObjC.h:2759
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:1001
bool propertyTypesAreCompatible(QualType, QualType)
ExprResult PerformCopyInitialization(const InitializedEntity &Entity, SourceLocation EqualLoc, ExprResult Init, bool TopLevelOfInitList=false, bool AllowExplicit=false)
Definition: SemaInit.cpp:8207
const ObjCInterfaceDecl * getClassInterface() const
Definition: DeclObjC.h:2331
static ParmVarDecl * Create(ASTContext &C, DeclContext *DC, SourceLocation StartLoc, SourceLocation IdLoc, IdentifierInfo *Id, QualType T, TypeSourceInfo *TInfo, StorageClass S, Expr *DefArg)
Definition: Decl.cpp:2385
static void setImpliedPropertyAttributeForReadOnlyProperty(ObjCPropertyDecl *property, ObjCIvarDecl *ivar)
setImpliedPropertyAttributeForReadOnlyProperty - This routine evaludates life-time attributes for a &#39;...
/file This file defines classes for searching and anlyzing source code clones.
bool isValid() const
Return true if this is a valid SourceLocation object.
ObjCPropertyDecl * FindPropertyDeclaration(const IdentifierInfo *PropertyId, ObjCPropertyQueryKind QueryKind) const
FindPropertyDeclaration - Finds declaration of the property given its name in &#39;PropertyId&#39; and return...
Definition: DeclObjC.cpp:213
void diagnoseNullResettableSynthesizedSetters(const ObjCImplDecl *impDecl)
Diagnose any null-resettable synthesized setters.
DeclContext - This is used only as base class of specific decl types that can act as declaration cont...
Definition: DeclBase.h:1147
static bool SuperClassImplementsProperty(ObjCInterfaceDecl *IDecl, ObjCPropertyDecl *Prop)
PropertyAttributeKind getPropertyAttributesAsWritten() const
Definition: DeclObjC.h:805
const internal::VariadicAllOfMatcher< Type > type
Matches Types in the clang AST.
Definition: ASTMatchers.h:2039
The basic abstraction for the target Objective-C runtime.
Definition: ObjCRuntime.h:25
SourceLocation getLocStart() const LLVM_READONLY
Definition: TypeLoc.h:130
bool CheckARCMethodDecl(ObjCMethodDecl *method)
Check a method declaration for compatibility with the Objective-C ARC conventions.
bool hasObjCLifetime() const
Definition: Type.h:308
static void DiagnosePropertyMismatchDeclInProtocols(Sema &S, SourceLocation AtLoc, ObjCInterfaceDecl *ClassDecl, ObjCPropertyDecl *Property)
DiagnosePropertyMismatchDeclInProtocols - diagnose properties declared in inherited protocols with mi...
bool hasDesignatedInitializers() const
Returns true if this interface decl contains at least one initializer marked with the &#39;objc_designate...
Definition: DeclObjC.cpp:1467
Represents a pointer to an Objective C object.
Definition: Type.h:5097
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:1690
ObjCImplementationDecl - Represents a class definition - this is where method definitions are specifi...
Definition: DeclObjC.h:2467
void overwritePropertyAttributes(unsigned PRVal)
Definition: DeclObjC.h:801
bool hasSameType(QualType T1, QualType T2) const
Determine whether the given types T1 and T2 are equivalent.
Definition: ASTContext.h:2075
const internal::VariadicDynCastAllOfMatcher< Stmt, CallExpr > callExpr
Matches call expressions.
Definition: ASTMatchers.h:1076
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.
void addDecl(Decl *D)
Add the declaration D into this context.
Definition: DeclBase.cpp:1342
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:653
static void checkAtomicPropertyMismatch(Sema &S, ObjCPropertyDecl *OldProperty, ObjCPropertyDecl *NewProperty, bool PropagateAtomicity)
Check for a mismatch in the atomicity of the given properties.
ObjCIvarRefExpr - A reference to an ObjC instance variable.
Definition: ExprObjC.h:479
SourceManager & getSourceManager()
Definition: ASTContext.h:608
bool isObjCObjectType() const
Definition: Type.h:5664
bool IsClassExtension() const
Definition: DeclObjC.h:2280
SourceLocation getIdentifierLoc() const
Definition: DeclSpec.h:2119
CanQualType getCanonicalType(QualType T) const
Return the canonical (structural) type corresponding to the specified potentially non-canonical type ...
Definition: ASTContext.h:2059
TypeLoc getTypeLoc() const
Return the TypeLoc wrapper for the type source info.
Definition: TypeLoc.h:215
static bool LocPropertyAttribute(ASTContext &Context, const char *attrName, SourceLocation LParenLoc, SourceLocation &Loc)
Reading or writing from this object requires a barrier call.
Definition: Type.h:149
Expr * MaybeCreateExprWithCleanups(Expr *SubExpr)
MaybeCreateExprWithCleanups - If the current full-expression requires any cleanups, surround it with a ExprWithCleanups node.
void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD)
ProcessDeclAttributes - Given a declarator (PD) with attributes indicated in it, apply them to D...
Compatible - the types are compatible according to the standard.
Definition: Sema.h:8995
ObjCPropertyImplDecl * FindPropertyImplDecl(IdentifierInfo *propertyId, ObjCPropertyQueryKind queryKind) const
FindPropertyImplDecl - This method looks up a previous ObjCPropertyImplDecl added to the list of thos...
Definition: DeclObjC.cpp:2063
ObjCIvarDecl - Represents an ObjC instance variable.
Definition: DeclObjC.h:1855
static unsigned deducePropertyOwnershipFromType(Sema &S, QualType T)
DeclContext * CurContext
CurContext - This is the current declaration context of parsing.
Definition: Sema.h:315
unsigned kind
All of the diagnostics that can be emitted by the frontend.
Definition: DiagnosticIDs.h:43
static FixItHint CreateReplacement(CharSourceRange RemoveRange, StringRef Code)
Create a code modification hint that replaces the given source range with the given code string...
void setPropertyAttributes(PropertyAttributeKind PRVal)
Definition: DeclObjC.h:798
void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, ObjCPropertyDecl *SuperProperty, const IdentifierInfo *Name, bool OverridingProtocolProperty)
DiagnosePropertyMismatch - Compares two properties for their attributes and types and warns on a vari...
StringRef getName() const
getName - Get the name of identifier for this declaration as a StringRef.
Definition: Decl.h:237
bool isArcWeakrefUnavailable() const
isArcWeakrefUnavailable - Checks for a class or one of its super classes to be incompatible with __we...
Definition: DeclObjC.cpp:390
bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, ObjCMethodDecl *Getter, SourceLocation Loc)
static const unsigned OwnershipMask
A reference to a declared variable, function, enum, etc.
Definition: Expr.h:948
void addPropertyImplementation(ObjCPropertyImplDecl *property)
Definition: DeclObjC.cpp:2022
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:599
An l-value expression is a reference to an object with independent storage.
Definition: Specifiers.h:109
A trivial tuple used to represent a source range.
ASTContext & Context
Definition: Sema.h:303
ObjCMethodDecl * getGetterMethodDecl() const
Definition: DeclObjC.h:863
QualType getObjCObjectPointerType(QualType OIT) const
Return a ObjCObjectPointerType type for the given ObjCObjectType.
ObjCMethodDecl * getInstanceMethod(Selector Sel, bool AllowHidden=false) const
Definition: DeclObjC.h:1013
ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, BinaryOperatorKind Opc, Expr *LHSExpr, Expr *RHSExpr)
Definition: SemaExpr.cpp:11482
llvm::DenseMap< const Stmt *, CFGBlock * > SMap
Definition: CFGStmtMap.cpp:22
AccessControl getAccessControl() const
Definition: DeclObjC.h:1894
bool isPropertyAccessor() const
Definition: DeclObjC.h:421
Selector getGetterName() const
Definition: DeclObjC.h:857
SourceLocation getLParenLoc() const
Definition: DeclObjC.h:779
void setType(QualType newType)
Definition: Decl.h:600
const LangOptions & getLangOpts() const
Definition: ASTContext.h:651
ObjCCategoryImplDecl - An object of this class encapsulates a category @implementation declaration...
Definition: DeclObjC.h:2386
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...
TypeSourceInfo * GetTypeForDeclarator(Declarator &D, Scope *S)
GetTypeForDeclarator - Convert the type for the specified declarator to Type instances.
Definition: SemaType.cpp:4752
QualType getType() const
Return the type wrapped by this type source info.
Definition: Decl.h:70
std::pair< FileID, unsigned > getDecomposedLoc(SourceLocation Loc) const
Decompose the specified location into a raw FileID + Offset pair.
Engages in a tight little dance with the lexer to efficiently preprocess tokens.
Definition: Preprocessor.h:97
Qualifiers::ObjCLifetime getObjCLifetime() const
Returns lifetime attribute of this type.
Definition: Type.h:1011
ObjCCategoryDecl * FindCategoryDeclaration(IdentifierInfo *CategoryId) const
FindCategoryDeclaration - Finds category declaration in the list of categories for this class and ret...
Definition: DeclObjC.cpp:1606