clang  6.0.0svn
SemaObjCProperty.cpp
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1 //===--- SemaObjCProperty.cpp - Semantic Analysis for ObjC @property ------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file implements semantic analysis for Objective C @property and
11 // @synthesize declarations.
12 //
13 //===----------------------------------------------------------------------===//
14 
17 #include "clang/AST/DeclObjC.h"
18 #include "clang/AST/ExprCXX.h"
19 #include "clang/AST/ExprObjC.h"
21 #include "clang/Lex/Lexer.h"
22 #include "clang/Lex/Preprocessor.h"
24 #include "llvm/ADT/DenseSet.h"
25 #include "llvm/ADT/SmallString.h"
26 
27 using namespace clang;
28 
29 //===----------------------------------------------------------------------===//
30 // Grammar actions.
31 //===----------------------------------------------------------------------===//
32 
33 /// getImpliedARCOwnership - Given a set of property attributes and a
34 /// type, infer an expected lifetime. The type's ownership qualification
35 /// is not considered.
36 ///
37 /// Returns OCL_None if the attributes as stated do not imply an ownership.
38 /// Never returns OCL_Autoreleasing.
41  QualType type) {
42  // retain, strong, copy, weak, and unsafe_unretained are only legal
43  // on properties of retainable pointer type.
48  } else if (attrs & ObjCPropertyDecl::OBJC_PR_weak) {
49  return Qualifiers::OCL_Weak;
52  }
53 
54  // assign can appear on other types, so we have to check the
55  // property type.
57  type->isObjCRetainableType()) {
59  }
60 
61  return Qualifiers::OCL_None;
62 }
63 
64 /// Check the internal consistency of a property declaration with
65 /// an explicit ownership qualifier.
67  ObjCPropertyDecl *property) {
68  if (property->isInvalidDecl()) return;
69 
71  = property->getPropertyAttributes();
72  Qualifiers::ObjCLifetime propertyLifetime
73  = property->getType().getObjCLifetime();
74 
75  assert(propertyLifetime != Qualifiers::OCL_None);
76 
77  Qualifiers::ObjCLifetime expectedLifetime
78  = getImpliedARCOwnership(propertyKind, property->getType());
79  if (!expectedLifetime) {
80  // We have a lifetime qualifier but no dominating property
81  // attribute. That's okay, but restore reasonable invariants by
82  // setting the property attribute according to the lifetime
83  // qualifier.
85  if (propertyLifetime == Qualifiers::OCL_Strong) {
87  } else if (propertyLifetime == Qualifiers::OCL_Weak) {
89  } else {
90  assert(propertyLifetime == Qualifiers::OCL_ExplicitNone);
92  }
93  property->setPropertyAttributes(attr);
94  return;
95  }
96 
97  if (propertyLifetime == expectedLifetime) return;
98 
99  property->setInvalidDecl();
100  S.Diag(property->getLocation(),
101  diag::err_arc_inconsistent_property_ownership)
102  << property->getDeclName()
103  << expectedLifetime
104  << propertyLifetime;
105 }
106 
107 /// \brief Check this Objective-C property against a property declared in the
108 /// given protocol.
109 static void
111  ObjCProtocolDecl *Proto,
112  llvm::SmallPtrSetImpl<ObjCProtocolDecl *> &Known) {
113  // Have we seen this protocol before?
114  if (!Known.insert(Proto).second)
115  return;
116 
117  // Look for a property with the same name.
118  DeclContext::lookup_result R = Proto->lookup(Prop->getDeclName());
119  for (unsigned I = 0, N = R.size(); I != N; ++I) {
120  if (ObjCPropertyDecl *ProtoProp = dyn_cast<ObjCPropertyDecl>(R[I])) {
121  S.DiagnosePropertyMismatch(Prop, ProtoProp, Proto->getIdentifier(), true);
122  return;
123  }
124  }
125 
126  // Check this property against any protocols we inherit.
127  for (auto *P : Proto->protocols())
128  CheckPropertyAgainstProtocol(S, Prop, P, Known);
129 }
130 
132  // In GC mode, just look for the __weak qualifier.
133  if (S.getLangOpts().getGC() != LangOptions::NonGC) {
134  if (T.isObjCGCWeak()) return ObjCDeclSpec::DQ_PR_weak;
135 
136  // In ARC/MRC, look for an explicit ownership qualifier.
137  // For some reason, this only applies to __weak.
138  } else if (auto ownership = T.getObjCLifetime()) {
139  switch (ownership) {
148  return 0;
149  }
150  llvm_unreachable("bad qualifier");
151  }
152 
153  return 0;
154 }
155 
156 static const unsigned OwnershipMask =
163 
164 static unsigned getOwnershipRule(unsigned attr) {
165  unsigned result = attr & OwnershipMask;
166 
167  // From an ownership perspective, assign and unsafe_unretained are
168  // identical; make sure one also implies the other.
169  if (result & (ObjCPropertyDecl::OBJC_PR_assign |
173  }
174 
175  return result;
176 }
177 
179  SourceLocation LParenLoc,
180  FieldDeclarator &FD,
181  ObjCDeclSpec &ODS,
182  Selector GetterSel,
183  Selector SetterSel,
184  tok::ObjCKeywordKind MethodImplKind,
185  DeclContext *lexicalDC) {
186  unsigned Attributes = ODS.getPropertyAttributes();
187  FD.D.setObjCWeakProperty((Attributes & ObjCDeclSpec::DQ_PR_weak) != 0);
188  TypeSourceInfo *TSI = GetTypeForDeclarator(FD.D, S);
189  QualType T = TSI->getType();
190  if (!getOwnershipRule(Attributes)) {
191  Attributes |= deducePropertyOwnershipFromType(*this, T);
192  }
193  bool isReadWrite = ((Attributes & ObjCDeclSpec::DQ_PR_readwrite) ||
194  // default is readwrite!
195  !(Attributes & ObjCDeclSpec::DQ_PR_readonly));
196 
197  // Proceed with constructing the ObjCPropertyDecls.
198  ObjCContainerDecl *ClassDecl = cast<ObjCContainerDecl>(CurContext);
199  ObjCPropertyDecl *Res = nullptr;
200  if (ObjCCategoryDecl *CDecl = dyn_cast<ObjCCategoryDecl>(ClassDecl)) {
201  if (CDecl->IsClassExtension()) {
202  Res = HandlePropertyInClassExtension(S, AtLoc, LParenLoc,
203  FD,
204  GetterSel, ODS.getGetterNameLoc(),
205  SetterSel, ODS.getSetterNameLoc(),
206  isReadWrite, Attributes,
207  ODS.getPropertyAttributes(),
208  T, TSI, MethodImplKind);
209  if (!Res)
210  return nullptr;
211  }
212  }
213 
214  if (!Res) {
215  Res = CreatePropertyDecl(S, ClassDecl, AtLoc, LParenLoc, FD,
216  GetterSel, ODS.getGetterNameLoc(), SetterSel,
217  ODS.getSetterNameLoc(), isReadWrite, Attributes,
218  ODS.getPropertyAttributes(), T, TSI,
219  MethodImplKind);
220  if (lexicalDC)
221  Res->setLexicalDeclContext(lexicalDC);
222  }
223 
224  // Validate the attributes on the @property.
225  CheckObjCPropertyAttributes(Res, AtLoc, Attributes,
226  (isa<ObjCInterfaceDecl>(ClassDecl) ||
227  isa<ObjCProtocolDecl>(ClassDecl)));
228 
229  // Check consistency if the type has explicit ownership qualification.
230  if (Res->getType().getObjCLifetime())
231  checkPropertyDeclWithOwnership(*this, Res);
232 
233  llvm::SmallPtrSet<ObjCProtocolDecl *, 16> KnownProtos;
234  if (ObjCInterfaceDecl *IFace = dyn_cast<ObjCInterfaceDecl>(ClassDecl)) {
235  // For a class, compare the property against a property in our superclass.
236  bool FoundInSuper = false;
237  ObjCInterfaceDecl *CurrentInterfaceDecl = IFace;
238  while (ObjCInterfaceDecl *Super = CurrentInterfaceDecl->getSuperClass()) {
239  DeclContext::lookup_result R = Super->lookup(Res->getDeclName());
240  for (unsigned I = 0, N = R.size(); I != N; ++I) {
241  if (ObjCPropertyDecl *SuperProp = dyn_cast<ObjCPropertyDecl>(R[I])) {
242  DiagnosePropertyMismatch(Res, SuperProp, Super->getIdentifier(), false);
243  FoundInSuper = true;
244  break;
245  }
246  }
247  if (FoundInSuper)
248  break;
249  else
250  CurrentInterfaceDecl = Super;
251  }
252 
253  if (FoundInSuper) {
254  // Also compare the property against a property in our protocols.
255  for (auto *P : CurrentInterfaceDecl->protocols()) {
256  CheckPropertyAgainstProtocol(*this, Res, P, KnownProtos);
257  }
258  } else {
259  // Slower path: look in all protocols we referenced.
260  for (auto *P : IFace->all_referenced_protocols()) {
261  CheckPropertyAgainstProtocol(*this, Res, P, KnownProtos);
262  }
263  }
264  } else if (ObjCCategoryDecl *Cat = dyn_cast<ObjCCategoryDecl>(ClassDecl)) {
265  // We don't check if class extension. Because properties in class extension
266  // are meant to override some of the attributes and checking has already done
267  // when property in class extension is constructed.
268  if (!Cat->IsClassExtension())
269  for (auto *P : Cat->protocols())
270  CheckPropertyAgainstProtocol(*this, Res, P, KnownProtos);
271  } else {
272  ObjCProtocolDecl *Proto = cast<ObjCProtocolDecl>(ClassDecl);
273  for (auto *P : Proto->protocols())
274  CheckPropertyAgainstProtocol(*this, Res, P, KnownProtos);
275  }
276 
278  return Res;
279 }
280 
282 makePropertyAttributesAsWritten(unsigned Attributes) {
283  unsigned attributesAsWritten = 0;
284  if (Attributes & ObjCDeclSpec::DQ_PR_readonly)
285  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_readonly;
286  if (Attributes & ObjCDeclSpec::DQ_PR_readwrite)
287  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_readwrite;
288  if (Attributes & ObjCDeclSpec::DQ_PR_getter)
289  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_getter;
290  if (Attributes & ObjCDeclSpec::DQ_PR_setter)
291  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_setter;
292  if (Attributes & ObjCDeclSpec::DQ_PR_assign)
293  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_assign;
294  if (Attributes & ObjCDeclSpec::DQ_PR_retain)
295  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_retain;
296  if (Attributes & ObjCDeclSpec::DQ_PR_strong)
297  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_strong;
298  if (Attributes & ObjCDeclSpec::DQ_PR_weak)
299  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_weak;
300  if (Attributes & ObjCDeclSpec::DQ_PR_copy)
301  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_copy;
302  if (Attributes & ObjCDeclSpec::DQ_PR_unsafe_unretained)
303  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_unsafe_unretained;
304  if (Attributes & ObjCDeclSpec::DQ_PR_nonatomic)
305  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_nonatomic;
306  if (Attributes & ObjCDeclSpec::DQ_PR_atomic)
307  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_atomic;
308  if (Attributes & ObjCDeclSpec::DQ_PR_class)
309  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_class;
310 
311  return (ObjCPropertyDecl::PropertyAttributeKind)attributesAsWritten;
312 }
313 
314 static bool LocPropertyAttribute( ASTContext &Context, const char *attrName,
315  SourceLocation LParenLoc, SourceLocation &Loc) {
316  if (LParenLoc.isMacroID())
317  return false;
318 
319  SourceManager &SM = Context.getSourceManager();
320  std::pair<FileID, unsigned> locInfo = SM.getDecomposedLoc(LParenLoc);
321  // Try to load the file buffer.
322  bool invalidTemp = false;
323  StringRef file = SM.getBufferData(locInfo.first, &invalidTemp);
324  if (invalidTemp)
325  return false;
326  const char *tokenBegin = file.data() + locInfo.second;
327 
328  // Lex from the start of the given location.
329  Lexer lexer(SM.getLocForStartOfFile(locInfo.first),
330  Context.getLangOpts(),
331  file.begin(), tokenBegin, file.end());
332  Token Tok;
333  do {
334  lexer.LexFromRawLexer(Tok);
335  if (Tok.is(tok::raw_identifier) && Tok.getRawIdentifier() == attrName) {
336  Loc = Tok.getLocation();
337  return true;
338  }
339  } while (Tok.isNot(tok::r_paren));
340  return false;
341 }
342 
343 /// Check for a mismatch in the atomicity of the given properties.
345  ObjCPropertyDecl *OldProperty,
346  ObjCPropertyDecl *NewProperty,
347  bool PropagateAtomicity) {
348  // If the atomicity of both matches, we're done.
349  bool OldIsAtomic =
351  == 0;
352  bool NewIsAtomic =
354  == 0;
355  if (OldIsAtomic == NewIsAtomic) return;
356 
357  // Determine whether the given property is readonly and implicitly
358  // atomic.
359  auto isImplicitlyReadonlyAtomic = [](ObjCPropertyDecl *Property) -> bool {
360  // Is it readonly?
361  auto Attrs = Property->getPropertyAttributes();
362  if ((Attrs & ObjCPropertyDecl::OBJC_PR_readonly) == 0) return false;
363 
364  // Is it nonatomic?
365  if (Attrs & ObjCPropertyDecl::OBJC_PR_nonatomic) return false;
366 
367  // Was 'atomic' specified directly?
368  if (Property->getPropertyAttributesAsWritten() &
370  return false;
371 
372  return true;
373  };
374 
375  // If we're allowed to propagate atomicity, and the new property did
376  // not specify atomicity at all, propagate.
377  const unsigned AtomicityMask =
379  if (PropagateAtomicity &&
380  ((NewProperty->getPropertyAttributesAsWritten() & AtomicityMask) == 0)) {
381  unsigned Attrs = NewProperty->getPropertyAttributes();
382  Attrs = Attrs & ~AtomicityMask;
383  if (OldIsAtomic)
385  else
387 
388  NewProperty->overwritePropertyAttributes(Attrs);
389  return;
390  }
391 
392  // One of the properties is atomic; if it's a readonly property, and
393  // 'atomic' wasn't explicitly specified, we're okay.
394  if ((OldIsAtomic && isImplicitlyReadonlyAtomic(OldProperty)) ||
395  (NewIsAtomic && isImplicitlyReadonlyAtomic(NewProperty)))
396  return;
397 
398  // Diagnose the conflict.
399  const IdentifierInfo *OldContextName;
400  auto *OldDC = OldProperty->getDeclContext();
401  if (auto Category = dyn_cast<ObjCCategoryDecl>(OldDC))
402  OldContextName = Category->getClassInterface()->getIdentifier();
403  else
404  OldContextName = cast<ObjCContainerDecl>(OldDC)->getIdentifier();
405 
406  S.Diag(NewProperty->getLocation(), diag::warn_property_attribute)
407  << NewProperty->getDeclName() << "atomic"
408  << OldContextName;
409  S.Diag(OldProperty->getLocation(), diag::note_property_declare);
410 }
411 
414  SourceLocation AtLoc,
415  SourceLocation LParenLoc,
416  FieldDeclarator &FD,
417  Selector GetterSel,
418  SourceLocation GetterNameLoc,
419  Selector SetterSel,
420  SourceLocation SetterNameLoc,
421  const bool isReadWrite,
422  unsigned &Attributes,
423  const unsigned AttributesAsWritten,
424  QualType T,
425  TypeSourceInfo *TSI,
426  tok::ObjCKeywordKind MethodImplKind) {
427  ObjCCategoryDecl *CDecl = cast<ObjCCategoryDecl>(CurContext);
428  // Diagnose if this property is already in continuation class.
429  DeclContext *DC = CurContext;
430  IdentifierInfo *PropertyId = FD.D.getIdentifier();
431  ObjCInterfaceDecl *CCPrimary = CDecl->getClassInterface();
432 
433  // We need to look in the @interface to see if the @property was
434  // already declared.
435  if (!CCPrimary) {
436  Diag(CDecl->getLocation(), diag::err_continuation_class);
437  return nullptr;
438  }
439 
440  bool isClassProperty = (AttributesAsWritten & ObjCDeclSpec::DQ_PR_class) ||
441  (Attributes & ObjCDeclSpec::DQ_PR_class);
442 
443  // Find the property in the extended class's primary class or
444  // extensions.
446  PropertyId, ObjCPropertyDecl::getQueryKind(isClassProperty));
447 
448  // If we found a property in an extension, complain.
449  if (PIDecl && isa<ObjCCategoryDecl>(PIDecl->getDeclContext())) {
450  Diag(AtLoc, diag::err_duplicate_property);
451  Diag(PIDecl->getLocation(), diag::note_property_declare);
452  return nullptr;
453  }
454 
455  // Check for consistency with the previous declaration, if there is one.
456  if (PIDecl) {
457  // A readonly property declared in the primary class can be refined
458  // by adding a readwrite property within an extension.
459  // Anything else is an error.
460  if (!(PIDecl->isReadOnly() && isReadWrite)) {
461  // Tailor the diagnostics for the common case where a readwrite
462  // property is declared both in the @interface and the continuation.
463  // This is a common error where the user often intended the original
464  // declaration to be readonly.
465  unsigned diag =
466  (Attributes & ObjCDeclSpec::DQ_PR_readwrite) &&
467  (PIDecl->getPropertyAttributesAsWritten() &
469  ? diag::err_use_continuation_class_redeclaration_readwrite
470  : diag::err_use_continuation_class;
471  Diag(AtLoc, diag)
472  << CCPrimary->getDeclName();
473  Diag(PIDecl->getLocation(), diag::note_property_declare);
474  return nullptr;
475  }
476 
477  // Check for consistency of getters.
478  if (PIDecl->getGetterName() != GetterSel) {
479  // If the getter was written explicitly, complain.
480  if (AttributesAsWritten & ObjCDeclSpec::DQ_PR_getter) {
481  Diag(AtLoc, diag::warn_property_redecl_getter_mismatch)
482  << PIDecl->getGetterName() << GetterSel;
483  Diag(PIDecl->getLocation(), diag::note_property_declare);
484  }
485 
486  // Always adopt the getter from the original declaration.
487  GetterSel = PIDecl->getGetterName();
488  Attributes |= ObjCDeclSpec::DQ_PR_getter;
489  }
490 
491  // Check consistency of ownership.
492  unsigned ExistingOwnership
494  unsigned NewOwnership = getOwnershipRule(Attributes);
495  if (ExistingOwnership && NewOwnership != ExistingOwnership) {
496  // If the ownership was written explicitly, complain.
497  if (getOwnershipRule(AttributesAsWritten)) {
498  Diag(AtLoc, diag::warn_property_attr_mismatch);
499  Diag(PIDecl->getLocation(), diag::note_property_declare);
500  }
501 
502  // Take the ownership from the original property.
503  Attributes = (Attributes & ~OwnershipMask) | ExistingOwnership;
504  }
505 
506  // If the redeclaration is 'weak' but the original property is not,
507  if ((Attributes & ObjCPropertyDecl::OBJC_PR_weak) &&
510  PIDecl->getType()->getAs<ObjCObjectPointerType>() &&
512  Diag(AtLoc, diag::warn_property_implicitly_mismatched);
513  Diag(PIDecl->getLocation(), diag::note_property_declare);
514  }
515  }
516 
517  // Create a new ObjCPropertyDecl with the DeclContext being
518  // the class extension.
519  ObjCPropertyDecl *PDecl = CreatePropertyDecl(S, CDecl, AtLoc, LParenLoc,
520  FD, GetterSel, GetterNameLoc,
521  SetterSel, SetterNameLoc,
522  isReadWrite,
523  Attributes, AttributesAsWritten,
524  T, TSI, MethodImplKind, DC);
525 
526  // If there was no declaration of a property with the same name in
527  // the primary class, we're done.
528  if (!PIDecl) {
529  ProcessPropertyDecl(PDecl);
530  return PDecl;
531  }
532 
533  if (!Context.hasSameType(PIDecl->getType(), PDecl->getType())) {
534  bool IncompatibleObjC = false;
535  QualType ConvertedType;
536  // Relax the strict type matching for property type in continuation class.
537  // Allow property object type of continuation class to be different as long
538  // as it narrows the object type in its primary class property. Note that
539  // this conversion is safe only because the wider type is for a 'readonly'
540  // property in primary class and 'narrowed' type for a 'readwrite' property
541  // in continuation class.
542  QualType PrimaryClassPropertyT = Context.getCanonicalType(PIDecl->getType());
543  QualType ClassExtPropertyT = Context.getCanonicalType(PDecl->getType());
544  if (!isa<ObjCObjectPointerType>(PrimaryClassPropertyT) ||
545  !isa<ObjCObjectPointerType>(ClassExtPropertyT) ||
546  (!isObjCPointerConversion(ClassExtPropertyT, PrimaryClassPropertyT,
547  ConvertedType, IncompatibleObjC))
548  || IncompatibleObjC) {
549  Diag(AtLoc,
550  diag::err_type_mismatch_continuation_class) << PDecl->getType();
551  Diag(PIDecl->getLocation(), diag::note_property_declare);
552  return nullptr;
553  }
554  }
555 
556  // Check that atomicity of property in class extension matches the previous
557  // declaration.
558  checkAtomicPropertyMismatch(*this, PIDecl, PDecl, true);
559 
560  // Make sure getter/setter are appropriately synthesized.
561  ProcessPropertyDecl(PDecl);
562  return PDecl;
563 }
564 
566  ObjCContainerDecl *CDecl,
567  SourceLocation AtLoc,
568  SourceLocation LParenLoc,
569  FieldDeclarator &FD,
570  Selector GetterSel,
571  SourceLocation GetterNameLoc,
572  Selector SetterSel,
573  SourceLocation SetterNameLoc,
574  const bool isReadWrite,
575  const unsigned Attributes,
576  const unsigned AttributesAsWritten,
577  QualType T,
578  TypeSourceInfo *TInfo,
579  tok::ObjCKeywordKind MethodImplKind,
580  DeclContext *lexicalDC){
581  IdentifierInfo *PropertyId = FD.D.getIdentifier();
582 
583  // Property defaults to 'assign' if it is readwrite, unless this is ARC
584  // and the type is retainable.
585  bool isAssign;
586  if (Attributes & (ObjCDeclSpec::DQ_PR_assign |
588  isAssign = true;
589  } else if (getOwnershipRule(Attributes) || !isReadWrite) {
590  isAssign = false;
591  } else {
592  isAssign = (!getLangOpts().ObjCAutoRefCount ||
593  !T->isObjCRetainableType());
594  }
595 
596  // Issue a warning if property is 'assign' as default and its
597  // object, which is gc'able conforms to NSCopying protocol
598  if (getLangOpts().getGC() != LangOptions::NonGC &&
599  isAssign && !(Attributes & ObjCDeclSpec::DQ_PR_assign)) {
600  if (const ObjCObjectPointerType *ObjPtrTy =
602  ObjCInterfaceDecl *IDecl = ObjPtrTy->getObjectType()->getInterface();
603  if (IDecl)
604  if (ObjCProtocolDecl* PNSCopying =
605  LookupProtocol(&Context.Idents.get("NSCopying"), AtLoc))
606  if (IDecl->ClassImplementsProtocol(PNSCopying, true))
607  Diag(AtLoc, diag::warn_implements_nscopying) << PropertyId;
608  }
609  }
610 
611  if (T->isObjCObjectType()) {
612  SourceLocation StarLoc = TInfo->getTypeLoc().getLocEnd();
613  StarLoc = getLocForEndOfToken(StarLoc);
614  Diag(FD.D.getIdentifierLoc(), diag::err_statically_allocated_object)
615  << FixItHint::CreateInsertion(StarLoc, "*");
617  SourceLocation TLoc = TInfo->getTypeLoc().getLocStart();
618  TInfo = Context.getTrivialTypeSourceInfo(T, TLoc);
619  }
620 
621  DeclContext *DC = cast<DeclContext>(CDecl);
623  FD.D.getIdentifierLoc(),
624  PropertyId, AtLoc,
625  LParenLoc, T, TInfo);
626 
627  bool isClassProperty = (AttributesAsWritten & ObjCDeclSpec::DQ_PR_class) ||
628  (Attributes & ObjCDeclSpec::DQ_PR_class);
629  // Class property and instance property can have the same name.
631  DC, PropertyId, ObjCPropertyDecl::getQueryKind(isClassProperty))) {
632  Diag(PDecl->getLocation(), diag::err_duplicate_property);
633  Diag(prevDecl->getLocation(), diag::note_property_declare);
634  PDecl->setInvalidDecl();
635  }
636  else {
637  DC->addDecl(PDecl);
638  if (lexicalDC)
639  PDecl->setLexicalDeclContext(lexicalDC);
640  }
641 
642  if (T->isArrayType() || T->isFunctionType()) {
643  Diag(AtLoc, diag::err_property_type) << T;
644  PDecl->setInvalidDecl();
645  }
646 
647  ProcessDeclAttributes(S, PDecl, FD.D);
648 
649  // Regardless of setter/getter attribute, we save the default getter/setter
650  // selector names in anticipation of declaration of setter/getter methods.
651  PDecl->setGetterName(GetterSel, GetterNameLoc);
652  PDecl->setSetterName(SetterSel, SetterNameLoc);
653  PDecl->setPropertyAttributesAsWritten(
654  makePropertyAttributesAsWritten(AttributesAsWritten));
655 
656  if (Attributes & ObjCDeclSpec::DQ_PR_readonly)
657  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_readonly);
658 
659  if (Attributes & ObjCDeclSpec::DQ_PR_getter)
660  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_getter);
661 
662  if (Attributes & ObjCDeclSpec::DQ_PR_setter)
663  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_setter);
664 
665  if (isReadWrite)
666  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_readwrite);
667 
668  if (Attributes & ObjCDeclSpec::DQ_PR_retain)
669  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_retain);
670 
671  if (Attributes & ObjCDeclSpec::DQ_PR_strong)
672  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_strong);
673 
674  if (Attributes & ObjCDeclSpec::DQ_PR_weak)
675  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_weak);
676 
677  if (Attributes & ObjCDeclSpec::DQ_PR_copy)
678  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_copy);
679 
680  if (Attributes & ObjCDeclSpec::DQ_PR_unsafe_unretained)
681  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_unsafe_unretained);
682 
683  if (isAssign)
684  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_assign);
685 
686  // In the semantic attributes, one of nonatomic or atomic is always set.
687  if (Attributes & ObjCDeclSpec::DQ_PR_nonatomic)
688  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_nonatomic);
689  else
690  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_atomic);
691 
692  // 'unsafe_unretained' is alias for 'assign'.
693  if (Attributes & ObjCDeclSpec::DQ_PR_unsafe_unretained)
694  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_assign);
695  if (isAssign)
696  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_unsafe_unretained);
697 
698  if (MethodImplKind == tok::objc_required)
699  PDecl->setPropertyImplementation(ObjCPropertyDecl::Required);
700  else if (MethodImplKind == tok::objc_optional)
701  PDecl->setPropertyImplementation(ObjCPropertyDecl::Optional);
702 
703  if (Attributes & ObjCDeclSpec::DQ_PR_nullability)
704  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_nullability);
705 
706  if (Attributes & ObjCDeclSpec::DQ_PR_null_resettable)
707  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_null_resettable);
708 
709  if (Attributes & ObjCDeclSpec::DQ_PR_class)
710  PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_class);
711 
712  return PDecl;
713 }
714 
715 static void checkARCPropertyImpl(Sema &S, SourceLocation propertyImplLoc,
716  ObjCPropertyDecl *property,
717  ObjCIvarDecl *ivar) {
718  if (property->isInvalidDecl() || ivar->isInvalidDecl()) return;
719 
720  QualType ivarType = ivar->getType();
721  Qualifiers::ObjCLifetime ivarLifetime = ivarType.getObjCLifetime();
722 
723  // The lifetime implied by the property's attributes.
724  Qualifiers::ObjCLifetime propertyLifetime =
726  property->getType());
727 
728  // We're fine if they match.
729  if (propertyLifetime == ivarLifetime) return;
730 
731  // None isn't a valid lifetime for an object ivar in ARC, and
732  // __autoreleasing is never valid; don't diagnose twice.
733  if ((ivarLifetime == Qualifiers::OCL_None &&
734  S.getLangOpts().ObjCAutoRefCount) ||
735  ivarLifetime == Qualifiers::OCL_Autoreleasing)
736  return;
737 
738  // If the ivar is private, and it's implicitly __unsafe_unretained
739  // becaues of its type, then pretend it was actually implicitly
740  // __strong. This is only sound because we're processing the
741  // property implementation before parsing any method bodies.
742  if (ivarLifetime == Qualifiers::OCL_ExplicitNone &&
743  propertyLifetime == Qualifiers::OCL_Strong &&
745  SplitQualType split = ivarType.split();
746  if (split.Quals.hasObjCLifetime()) {
747  assert(ivarType->isObjCARCImplicitlyUnretainedType());
749  ivarType = S.Context.getQualifiedType(split);
750  ivar->setType(ivarType);
751  return;
752  }
753  }
754 
755  switch (propertyLifetime) {
757  S.Diag(ivar->getLocation(), diag::err_arc_strong_property_ownership)
758  << property->getDeclName()
759  << ivar->getDeclName()
760  << ivarLifetime;
761  break;
762 
764  S.Diag(ivar->getLocation(), diag::err_weak_property)
765  << property->getDeclName()
766  << ivar->getDeclName();
767  break;
768 
770  S.Diag(ivar->getLocation(), diag::err_arc_assign_property_ownership)
771  << property->getDeclName()
772  << ivar->getDeclName()
773  << ((property->getPropertyAttributesAsWritten()
775  break;
776 
778  llvm_unreachable("properties cannot be autoreleasing");
779 
781  // Any other property should be ignored.
782  return;
783  }
784 
785  S.Diag(property->getLocation(), diag::note_property_declare);
786  if (propertyImplLoc.isValid())
787  S.Diag(propertyImplLoc, diag::note_property_synthesize);
788 }
789 
790 /// setImpliedPropertyAttributeForReadOnlyProperty -
791 /// This routine evaludates life-time attributes for a 'readonly'
792 /// property with no known lifetime of its own, using backing
793 /// 'ivar's attribute, if any. If no backing 'ivar', property's
794 /// life-time is assumed 'strong'.
796  ObjCPropertyDecl *property, ObjCIvarDecl *ivar) {
797  Qualifiers::ObjCLifetime propertyLifetime =
799  property->getType());
800  if (propertyLifetime != Qualifiers::OCL_None)
801  return;
802 
803  if (!ivar) {
804  // if no backing ivar, make property 'strong'.
805  property->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_strong);
806  return;
807  }
808  // property assumes owenership of backing ivar.
809  QualType ivarType = ivar->getType();
810  Qualifiers::ObjCLifetime ivarLifetime = ivarType.getObjCLifetime();
811  if (ivarLifetime == Qualifiers::OCL_Strong)
812  property->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_strong);
813  else if (ivarLifetime == Qualifiers::OCL_Weak)
814  property->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_weak);
815 }
816 
817 static bool
818 isIncompatiblePropertyAttribute(unsigned Attr1, unsigned Attr2,
820  return (Attr1 & Kind) != (Attr2 & Kind);
821 }
822 
823 static bool areIncompatiblePropertyAttributes(unsigned Attr1, unsigned Attr2,
824  unsigned Kinds) {
825  return ((Attr1 & Kinds) != 0) != ((Attr2 & Kinds) != 0);
826 }
827 
828 /// SelectPropertyForSynthesisFromProtocols - Finds the most appropriate
829 /// property declaration that should be synthesised in all of the inherited
830 /// protocols. It also diagnoses properties declared in inherited protocols with
831 /// mismatched types or attributes, since any of them can be candidate for
832 /// synthesis.
833 static ObjCPropertyDecl *
835  ObjCInterfaceDecl *ClassDecl,
837  assert(isa<ObjCProtocolDecl>(Property->getDeclContext()) &&
838  "Expected a property from a protocol");
841  for (const auto *PI : ClassDecl->all_referenced_protocols()) {
842  if (const ObjCProtocolDecl *PDecl = PI->getDefinition())
843  PDecl->collectInheritedProtocolProperties(Property, ProtocolSet,
844  Properties);
845  }
846  if (ObjCInterfaceDecl *SDecl = ClassDecl->getSuperClass()) {
847  while (SDecl) {
848  for (const auto *PI : SDecl->all_referenced_protocols()) {
849  if (const ObjCProtocolDecl *PDecl = PI->getDefinition())
850  PDecl->collectInheritedProtocolProperties(Property, ProtocolSet,
851  Properties);
852  }
853  SDecl = SDecl->getSuperClass();
854  }
855  }
856 
857  if (Properties.empty())
858  return Property;
859 
860  ObjCPropertyDecl *OriginalProperty = Property;
861  size_t SelectedIndex = 0;
862  for (const auto &Prop : llvm::enumerate(Properties)) {
863  // Select the 'readwrite' property if such property exists.
864  if (Property->isReadOnly() && !Prop.value()->isReadOnly()) {
865  Property = Prop.value();
866  SelectedIndex = Prop.index();
867  }
868  }
869  if (Property != OriginalProperty) {
870  // Check that the old property is compatible with the new one.
871  Properties[SelectedIndex] = OriginalProperty;
872  }
873 
874  QualType RHSType = S.Context.getCanonicalType(Property->getType());
875  unsigned OriginalAttributes = Property->getPropertyAttributes();
876  enum MismatchKind {
877  IncompatibleType = 0,
878  HasNoExpectedAttribute,
879  HasUnexpectedAttribute,
880  DifferentGetter,
881  DifferentSetter
882  };
883  // Represents a property from another protocol that conflicts with the
884  // selected declaration.
885  struct MismatchingProperty {
886  const ObjCPropertyDecl *Prop;
887  MismatchKind Kind;
888  StringRef AttributeName;
889  };
891  for (ObjCPropertyDecl *Prop : Properties) {
892  // Verify the property attributes.
893  unsigned Attr = Prop->getPropertyAttributes();
894  if (Attr != OriginalAttributes) {
895  auto Diag = [&](bool OriginalHasAttribute, StringRef AttributeName) {
896  MismatchKind Kind = OriginalHasAttribute ? HasNoExpectedAttribute
897  : HasUnexpectedAttribute;
898  Mismatches.push_back({Prop, Kind, AttributeName});
899  };
900  if (isIncompatiblePropertyAttribute(OriginalAttributes, Attr,
902  Diag(OriginalAttributes & ObjCPropertyDecl::OBJC_PR_copy, "copy");
903  continue;
904  }
906  OriginalAttributes, Attr, ObjCPropertyDecl::OBJC_PR_retain |
908  Diag(OriginalAttributes & (ObjCPropertyDecl::OBJC_PR_retain |
910  "retain (or strong)");
911  continue;
912  }
913  if (isIncompatiblePropertyAttribute(OriginalAttributes, Attr,
915  Diag(OriginalAttributes & ObjCPropertyDecl::OBJC_PR_atomic, "atomic");
916  continue;
917  }
918  }
919  if (Property->getGetterName() != Prop->getGetterName()) {
920  Mismatches.push_back({Prop, DifferentGetter, ""});
921  continue;
922  }
923  if (!Property->isReadOnly() && !Prop->isReadOnly() &&
924  Property->getSetterName() != Prop->getSetterName()) {
925  Mismatches.push_back({Prop, DifferentSetter, ""});
926  continue;
927  }
928  QualType LHSType = S.Context.getCanonicalType(Prop->getType());
929  if (!S.Context.propertyTypesAreCompatible(LHSType, RHSType)) {
930  bool IncompatibleObjC = false;
931  QualType ConvertedType;
932  if (!S.isObjCPointerConversion(RHSType, LHSType, ConvertedType, IncompatibleObjC)
933  || IncompatibleObjC) {
934  Mismatches.push_back({Prop, IncompatibleType, ""});
935  continue;
936  }
937  }
938  }
939 
940  if (Mismatches.empty())
941  return Property;
942 
943  // Diagnose incompability.
944  {
945  bool HasIncompatibleAttributes = false;
946  for (const auto &Note : Mismatches)
947  HasIncompatibleAttributes =
948  Note.Kind != IncompatibleType ? true : HasIncompatibleAttributes;
949  // Promote the warning to an error if there are incompatible attributes or
950  // incompatible types together with readwrite/readonly incompatibility.
951  auto Diag = S.Diag(Property->getLocation(),
952  Property != OriginalProperty || HasIncompatibleAttributes
953  ? diag::err_protocol_property_mismatch
954  : diag::warn_protocol_property_mismatch);
955  Diag << Mismatches[0].Kind;
956  switch (Mismatches[0].Kind) {
957  case IncompatibleType:
958  Diag << Property->getType();
959  break;
960  case HasNoExpectedAttribute:
961  case HasUnexpectedAttribute:
962  Diag << Mismatches[0].AttributeName;
963  break;
964  case DifferentGetter:
965  Diag << Property->getGetterName();
966  break;
967  case DifferentSetter:
968  Diag << Property->getSetterName();
969  break;
970  }
971  }
972  for (const auto &Note : Mismatches) {
973  auto Diag =
974  S.Diag(Note.Prop->getLocation(), diag::note_protocol_property_declare)
975  << Note.Kind;
976  switch (Note.Kind) {
977  case IncompatibleType:
978  Diag << Note.Prop->getType();
979  break;
980  case HasNoExpectedAttribute:
981  case HasUnexpectedAttribute:
982  Diag << Note.AttributeName;
983  break;
984  case DifferentGetter:
985  Diag << Note.Prop->getGetterName();
986  break;
987  case DifferentSetter:
988  Diag << Note.Prop->getSetterName();
989  break;
990  }
991  }
992  if (AtLoc.isValid())
993  S.Diag(AtLoc, diag::note_property_synthesize);
994 
995  return Property;
996 }
997 
998 /// Determine whether any storage attributes were written on the property.
1000  ObjCPropertyQueryKind QueryKind) {
1001  if (Prop->getPropertyAttributesAsWritten() & OwnershipMask) return true;
1002 
1003  // If this is a readwrite property in a class extension that refines
1004  // a readonly property in the original class definition, check it as
1005  // well.
1006 
1007  // If it's a readonly property, we're not interested.
1008  if (Prop->isReadOnly()) return false;
1009 
1010  // Is it declared in an extension?
1011  auto Category = dyn_cast<ObjCCategoryDecl>(Prop->getDeclContext());
1012  if (!Category || !Category->IsClassExtension()) return false;
1013 
1014  // Find the corresponding property in the primary class definition.
1015  auto OrigClass = Category->getClassInterface();
1016  for (auto Found : OrigClass->lookup(Prop->getDeclName())) {
1017  if (ObjCPropertyDecl *OrigProp = dyn_cast<ObjCPropertyDecl>(Found))
1018  return OrigProp->getPropertyAttributesAsWritten() & OwnershipMask;
1019  }
1020 
1021  // Look through all of the protocols.
1022  for (const auto *Proto : OrigClass->all_referenced_protocols()) {
1023  if (ObjCPropertyDecl *OrigProp = Proto->FindPropertyDeclaration(
1024  Prop->getIdentifier(), QueryKind))
1025  return OrigProp->getPropertyAttributesAsWritten() & OwnershipMask;
1026  }
1027 
1028  return false;
1029 }
1030 
1031 /// ActOnPropertyImplDecl - This routine performs semantic checks and
1032 /// builds the AST node for a property implementation declaration; declared
1033 /// as \@synthesize or \@dynamic.
1034 ///
1036  SourceLocation AtLoc,
1037  SourceLocation PropertyLoc,
1038  bool Synthesize,
1039  IdentifierInfo *PropertyId,
1040  IdentifierInfo *PropertyIvar,
1041  SourceLocation PropertyIvarLoc,
1042  ObjCPropertyQueryKind QueryKind) {
1043  ObjCContainerDecl *ClassImpDecl =
1044  dyn_cast<ObjCContainerDecl>(CurContext);
1045  // Make sure we have a context for the property implementation declaration.
1046  if (!ClassImpDecl) {
1047  Diag(AtLoc, diag::err_missing_property_context);
1048  return nullptr;
1049  }
1050  if (PropertyIvarLoc.isInvalid())
1051  PropertyIvarLoc = PropertyLoc;
1052  SourceLocation PropertyDiagLoc = PropertyLoc;
1053  if (PropertyDiagLoc.isInvalid())
1054  PropertyDiagLoc = ClassImpDecl->getLocStart();
1055  ObjCPropertyDecl *property = nullptr;
1056  ObjCInterfaceDecl *IDecl = nullptr;
1057  // Find the class or category class where this property must have
1058  // a declaration.
1059  ObjCImplementationDecl *IC = nullptr;
1060  ObjCCategoryImplDecl *CatImplClass = nullptr;
1061  if ((IC = dyn_cast<ObjCImplementationDecl>(ClassImpDecl))) {
1062  IDecl = IC->getClassInterface();
1063  // We always synthesize an interface for an implementation
1064  // without an interface decl. So, IDecl is always non-zero.
1065  assert(IDecl &&
1066  "ActOnPropertyImplDecl - @implementation without @interface");
1067 
1068  // Look for this property declaration in the @implementation's @interface
1069  property = IDecl->FindPropertyDeclaration(PropertyId, QueryKind);
1070  if (!property) {
1071  Diag(PropertyLoc, diag::err_bad_property_decl) << IDecl->getDeclName();
1072  return nullptr;
1073  }
1074  if (property->isClassProperty() && Synthesize) {
1075  Diag(PropertyLoc, diag::err_synthesize_on_class_property) << PropertyId;
1076  return nullptr;
1077  }
1078  unsigned PIkind = property->getPropertyAttributesAsWritten();
1079  if ((PIkind & (ObjCPropertyDecl::OBJC_PR_atomic |
1081  if (AtLoc.isValid())
1082  Diag(AtLoc, diag::warn_implicit_atomic_property);
1083  else
1084  Diag(IC->getLocation(), diag::warn_auto_implicit_atomic_property);
1085  Diag(property->getLocation(), diag::note_property_declare);
1086  }
1087 
1088  if (const ObjCCategoryDecl *CD =
1089  dyn_cast<ObjCCategoryDecl>(property->getDeclContext())) {
1090  if (!CD->IsClassExtension()) {
1091  Diag(PropertyLoc, diag::err_category_property) << CD->getDeclName();
1092  Diag(property->getLocation(), diag::note_property_declare);
1093  return nullptr;
1094  }
1095  }
1096  if (Synthesize&&
1098  property->hasAttr<IBOutletAttr>() &&
1099  !AtLoc.isValid()) {
1100  bool ReadWriteProperty = false;
1101  // Search into the class extensions and see if 'readonly property is
1102  // redeclared 'readwrite', then no warning is to be issued.
1103  for (auto *Ext : IDecl->known_extensions()) {
1104  DeclContext::lookup_result R = Ext->lookup(property->getDeclName());
1105  if (!R.empty())
1106  if (ObjCPropertyDecl *ExtProp = dyn_cast<ObjCPropertyDecl>(R[0])) {
1107  PIkind = ExtProp->getPropertyAttributesAsWritten();
1108  if (PIkind & ObjCPropertyDecl::OBJC_PR_readwrite) {
1109  ReadWriteProperty = true;
1110  break;
1111  }
1112  }
1113  }
1114 
1115  if (!ReadWriteProperty) {
1116  Diag(property->getLocation(), diag::warn_auto_readonly_iboutlet_property)
1117  << property;
1118  SourceLocation readonlyLoc;
1119  if (LocPropertyAttribute(Context, "readonly",
1120  property->getLParenLoc(), readonlyLoc)) {
1121  SourceLocation endLoc =
1122  readonlyLoc.getLocWithOffset(strlen("readonly")-1);
1123  SourceRange ReadonlySourceRange(readonlyLoc, endLoc);
1124  Diag(property->getLocation(),
1125  diag::note_auto_readonly_iboutlet_fixup_suggest) <<
1126  FixItHint::CreateReplacement(ReadonlySourceRange, "readwrite");
1127  }
1128  }
1129  }
1130  if (Synthesize && isa<ObjCProtocolDecl>(property->getDeclContext()))
1131  property = SelectPropertyForSynthesisFromProtocols(*this, AtLoc, IDecl,
1132  property);
1133 
1134  } else if ((CatImplClass = dyn_cast<ObjCCategoryImplDecl>(ClassImpDecl))) {
1135  if (Synthesize) {
1136  Diag(AtLoc, diag::err_synthesize_category_decl);
1137  return nullptr;
1138  }
1139  IDecl = CatImplClass->getClassInterface();
1140  if (!IDecl) {
1141  Diag(AtLoc, diag::err_missing_property_interface);
1142  return nullptr;
1143  }
1145  IDecl->FindCategoryDeclaration(CatImplClass->getIdentifier());
1146 
1147  // If category for this implementation not found, it is an error which
1148  // has already been reported eralier.
1149  if (!Category)
1150  return nullptr;
1151  // Look for this property declaration in @implementation's category
1152  property = Category->FindPropertyDeclaration(PropertyId, QueryKind);
1153  if (!property) {
1154  Diag(PropertyLoc, diag::err_bad_category_property_decl)
1155  << Category->getDeclName();
1156  return nullptr;
1157  }
1158  } else {
1159  Diag(AtLoc, diag::err_bad_property_context);
1160  return nullptr;
1161  }
1162  ObjCIvarDecl *Ivar = nullptr;
1163  bool CompleteTypeErr = false;
1164  bool compat = true;
1165  // Check that we have a valid, previously declared ivar for @synthesize
1166  if (Synthesize) {
1167  // @synthesize
1168  if (!PropertyIvar)
1169  PropertyIvar = PropertyId;
1170  // Check that this is a previously declared 'ivar' in 'IDecl' interface
1171  ObjCInterfaceDecl *ClassDeclared;
1172  Ivar = IDecl->lookupInstanceVariable(PropertyIvar, ClassDeclared);
1173  QualType PropType = property->getType();
1174  QualType PropertyIvarType = PropType.getNonReferenceType();
1175 
1176  if (RequireCompleteType(PropertyDiagLoc, PropertyIvarType,
1177  diag::err_incomplete_synthesized_property,
1178  property->getDeclName())) {
1179  Diag(property->getLocation(), diag::note_property_declare);
1180  CompleteTypeErr = true;
1181  }
1182 
1183  if (getLangOpts().ObjCAutoRefCount &&
1184  (property->getPropertyAttributesAsWritten() &
1186  PropertyIvarType->isObjCRetainableType()) {
1188  }
1189 
1191  = property->getPropertyAttributes();
1192 
1193  bool isARCWeak = false;
1194  if (kind & ObjCPropertyDecl::OBJC_PR_weak) {
1195  // Add GC __weak to the ivar type if the property is weak.
1196  if (getLangOpts().getGC() != LangOptions::NonGC) {
1197  assert(!getLangOpts().ObjCAutoRefCount);
1198  if (PropertyIvarType.isObjCGCStrong()) {
1199  Diag(PropertyDiagLoc, diag::err_gc_weak_property_strong_type);
1200  Diag(property->getLocation(), diag::note_property_declare);
1201  } else {
1202  PropertyIvarType =
1203  Context.getObjCGCQualType(PropertyIvarType, Qualifiers::Weak);
1204  }
1205 
1206  // Otherwise, check whether ARC __weak is enabled and works with
1207  // the property type.
1208  } else {
1209  if (!getLangOpts().ObjCWeak) {
1210  // Only complain here when synthesizing an ivar.
1211  if (!Ivar) {
1212  Diag(PropertyDiagLoc,
1213  getLangOpts().ObjCWeakRuntime
1214  ? diag::err_synthesizing_arc_weak_property_disabled
1215  : diag::err_synthesizing_arc_weak_property_no_runtime);
1216  Diag(property->getLocation(), diag::note_property_declare);
1217  }
1218  CompleteTypeErr = true; // suppress later diagnostics about the ivar
1219  } else {
1220  isARCWeak = true;
1221  if (const ObjCObjectPointerType *ObjT =
1222  PropertyIvarType->getAs<ObjCObjectPointerType>()) {
1223  const ObjCInterfaceDecl *ObjI = ObjT->getInterfaceDecl();
1224  if (ObjI && ObjI->isArcWeakrefUnavailable()) {
1225  Diag(property->getLocation(),
1226  diag::err_arc_weak_unavailable_property)
1227  << PropertyIvarType;
1228  Diag(ClassImpDecl->getLocation(), diag::note_implemented_by_class)
1229  << ClassImpDecl->getName();
1230  }
1231  }
1232  }
1233  }
1234  }
1235 
1236  if (AtLoc.isInvalid()) {
1237  // Check when default synthesizing a property that there is
1238  // an ivar matching property name and issue warning; since this
1239  // is the most common case of not using an ivar used for backing
1240  // property in non-default synthesis case.
1241  ObjCInterfaceDecl *ClassDeclared=nullptr;
1242  ObjCIvarDecl *originalIvar =
1243  IDecl->lookupInstanceVariable(property->getIdentifier(),
1244  ClassDeclared);
1245  if (originalIvar) {
1246  Diag(PropertyDiagLoc,
1247  diag::warn_autosynthesis_property_ivar_match)
1248  << PropertyId << (Ivar == nullptr) << PropertyIvar
1249  << originalIvar->getIdentifier();
1250  Diag(property->getLocation(), diag::note_property_declare);
1251  Diag(originalIvar->getLocation(), diag::note_ivar_decl);
1252  }
1253  }
1254 
1255  if (!Ivar) {
1256  // In ARC, give the ivar a lifetime qualifier based on the
1257  // property attributes.
1258  if ((getLangOpts().ObjCAutoRefCount || isARCWeak) &&
1259  !PropertyIvarType.getObjCLifetime() &&
1260  PropertyIvarType->isObjCRetainableType()) {
1261 
1262  // It's an error if we have to do this and the user didn't
1263  // explicitly write an ownership attribute on the property.
1264  if (!hasWrittenStorageAttribute(property, QueryKind) &&
1266  Diag(PropertyDiagLoc,
1267  diag::err_arc_objc_property_default_assign_on_object);
1268  Diag(property->getLocation(), diag::note_property_declare);
1269  } else {
1270  Qualifiers::ObjCLifetime lifetime =
1271  getImpliedARCOwnership(kind, PropertyIvarType);
1272  assert(lifetime && "no lifetime for property?");
1273 
1274  Qualifiers qs;
1275  qs.addObjCLifetime(lifetime);
1276  PropertyIvarType = Context.getQualifiedType(PropertyIvarType, qs);
1277  }
1278  }
1279 
1280  Ivar = ObjCIvarDecl::Create(Context, ClassImpDecl,
1281  PropertyIvarLoc,PropertyIvarLoc, PropertyIvar,
1282  PropertyIvarType, /*Dinfo=*/nullptr,
1284  (Expr *)nullptr, true);
1285  if (RequireNonAbstractType(PropertyIvarLoc,
1286  PropertyIvarType,
1287  diag::err_abstract_type_in_decl,
1289  Diag(property->getLocation(), diag::note_property_declare);
1290  // An abstract type is as bad as an incomplete type.
1291  CompleteTypeErr = true;
1292  }
1293  if (CompleteTypeErr)
1294  Ivar->setInvalidDecl();
1295  ClassImpDecl->addDecl(Ivar);
1296  IDecl->makeDeclVisibleInContext(Ivar);
1297 
1299  Diag(PropertyDiagLoc, diag::err_missing_property_ivar_decl)
1300  << PropertyId;
1301  // Note! I deliberately want it to fall thru so, we have a
1302  // a property implementation and to avoid future warnings.
1303  } else if (getLangOpts().ObjCRuntime.isNonFragile() &&
1304  !declaresSameEntity(ClassDeclared, IDecl)) {
1305  Diag(PropertyDiagLoc, diag::err_ivar_in_superclass_use)
1306  << property->getDeclName() << Ivar->getDeclName()
1307  << ClassDeclared->getDeclName();
1308  Diag(Ivar->getLocation(), diag::note_previous_access_declaration)
1309  << Ivar << Ivar->getName();
1310  // Note! I deliberately want it to fall thru so more errors are caught.
1311  }
1312  property->setPropertyIvarDecl(Ivar);
1313 
1314  QualType IvarType = Context.getCanonicalType(Ivar->getType());
1315 
1316  // Check that type of property and its ivar are type compatible.
1317  if (!Context.hasSameType(PropertyIvarType, IvarType)) {
1318  if (isa<ObjCObjectPointerType>(PropertyIvarType)
1319  && isa<ObjCObjectPointerType>(IvarType))
1320  compat =
1322  PropertyIvarType->getAs<ObjCObjectPointerType>(),
1323  IvarType->getAs<ObjCObjectPointerType>());
1324  else {
1325  compat = (CheckAssignmentConstraints(PropertyIvarLoc, PropertyIvarType,
1326  IvarType)
1327  == Compatible);
1328  }
1329  if (!compat) {
1330  Diag(PropertyDiagLoc, diag::err_property_ivar_type)
1331  << property->getDeclName() << PropType
1332  << Ivar->getDeclName() << IvarType;
1333  Diag(Ivar->getLocation(), diag::note_ivar_decl);
1334  // Note! I deliberately want it to fall thru so, we have a
1335  // a property implementation and to avoid future warnings.
1336  }
1337  else {
1338  // FIXME! Rules for properties are somewhat different that those
1339  // for assignments. Use a new routine to consolidate all cases;
1340  // specifically for property redeclarations as well as for ivars.
1341  QualType lhsType =Context.getCanonicalType(PropertyIvarType).getUnqualifiedType();
1342  QualType rhsType =Context.getCanonicalType(IvarType).getUnqualifiedType();
1343  if (lhsType != rhsType &&
1344  lhsType->isArithmeticType()) {
1345  Diag(PropertyDiagLoc, diag::err_property_ivar_type)
1346  << property->getDeclName() << PropType
1347  << Ivar->getDeclName() << IvarType;
1348  Diag(Ivar->getLocation(), diag::note_ivar_decl);
1349  // Fall thru - see previous comment
1350  }
1351  }
1352  // __weak is explicit. So it works on Canonical type.
1353  if ((PropType.isObjCGCWeak() && !IvarType.isObjCGCWeak() &&
1354  getLangOpts().getGC() != LangOptions::NonGC)) {
1355  Diag(PropertyDiagLoc, diag::err_weak_property)
1356  << property->getDeclName() << Ivar->getDeclName();
1357  Diag(Ivar->getLocation(), diag::note_ivar_decl);
1358  // Fall thru - see previous comment
1359  }
1360  // Fall thru - see previous comment
1361  if ((property->getType()->isObjCObjectPointerType() ||
1362  PropType.isObjCGCStrong()) && IvarType.isObjCGCWeak() &&
1363  getLangOpts().getGC() != LangOptions::NonGC) {
1364  Diag(PropertyDiagLoc, diag::err_strong_property)
1365  << property->getDeclName() << Ivar->getDeclName();
1366  // Fall thru - see previous comment
1367  }
1368  }
1369  if (getLangOpts().ObjCAutoRefCount || isARCWeak ||
1370  Ivar->getType().getObjCLifetime())
1371  checkARCPropertyImpl(*this, PropertyLoc, property, Ivar);
1372  } else if (PropertyIvar)
1373  // @dynamic
1374  Diag(PropertyDiagLoc, diag::err_dynamic_property_ivar_decl);
1375 
1376  assert (property && "ActOnPropertyImplDecl - property declaration missing");
1377  ObjCPropertyImplDecl *PIDecl =
1378  ObjCPropertyImplDecl::Create(Context, CurContext, AtLoc, PropertyLoc,
1379  property,
1380  (Synthesize ?
1383  Ivar, PropertyIvarLoc);
1384 
1385  if (CompleteTypeErr || !compat)
1386  PIDecl->setInvalidDecl();
1387 
1388  if (ObjCMethodDecl *getterMethod = property->getGetterMethodDecl()) {
1389  getterMethod->createImplicitParams(Context, IDecl);
1390  if (getLangOpts().CPlusPlus && Synthesize && !CompleteTypeErr &&
1391  Ivar->getType()->isRecordType()) {
1392  // For Objective-C++, need to synthesize the AST for the IVAR object to be
1393  // returned by the getter as it must conform to C++'s copy-return rules.
1394  // FIXME. Eventually we want to do this for Objective-C as well.
1395  SynthesizedFunctionScope Scope(*this, getterMethod);
1396  ImplicitParamDecl *SelfDecl = getterMethod->getSelfDecl();
1397  DeclRefExpr *SelfExpr =
1398  new (Context) DeclRefExpr(SelfDecl, false, SelfDecl->getType(),
1399  VK_LValue, PropertyDiagLoc);
1400  MarkDeclRefReferenced(SelfExpr);
1401  Expr *LoadSelfExpr =
1403  CK_LValueToRValue, SelfExpr, nullptr,
1404  VK_RValue);
1405  Expr *IvarRefExpr =
1406  new (Context) ObjCIvarRefExpr(Ivar,
1407  Ivar->getUsageType(SelfDecl->getType()),
1408  PropertyDiagLoc,
1409  Ivar->getLocation(),
1410  LoadSelfExpr, true, true);
1412  InitializedEntity::InitializeResult(PropertyDiagLoc,
1413  getterMethod->getReturnType(),
1414  /*NRVO=*/false),
1415  PropertyDiagLoc, IvarRefExpr);
1416  if (!Res.isInvalid()) {
1417  Expr *ResExpr = Res.getAs<Expr>();
1418  if (ResExpr)
1419  ResExpr = MaybeCreateExprWithCleanups(ResExpr);
1420  PIDecl->setGetterCXXConstructor(ResExpr);
1421  }
1422  }
1423  if (property->hasAttr<NSReturnsNotRetainedAttr>() &&
1424  !getterMethod->hasAttr<NSReturnsNotRetainedAttr>()) {
1425  Diag(getterMethod->getLocation(),
1426  diag::warn_property_getter_owning_mismatch);
1427  Diag(property->getLocation(), diag::note_property_declare);
1428  }
1429  if (getLangOpts().ObjCAutoRefCount && Synthesize)
1430  switch (getterMethod->getMethodFamily()) {
1431  case OMF_retain:
1432  case OMF_retainCount:
1433  case OMF_release:
1434  case OMF_autorelease:
1435  Diag(getterMethod->getLocation(), diag::err_arc_illegal_method_def)
1436  << 1 << getterMethod->getSelector();
1437  break;
1438  default:
1439  break;
1440  }
1441  }
1442  if (ObjCMethodDecl *setterMethod = property->getSetterMethodDecl()) {
1443  setterMethod->createImplicitParams(Context, IDecl);
1444  if (getLangOpts().CPlusPlus && Synthesize && !CompleteTypeErr &&
1445  Ivar->getType()->isRecordType()) {
1446  // FIXME. Eventually we want to do this for Objective-C as well.
1447  SynthesizedFunctionScope Scope(*this, setterMethod);
1448  ImplicitParamDecl *SelfDecl = setterMethod->getSelfDecl();
1449  DeclRefExpr *SelfExpr =
1450  new (Context) DeclRefExpr(SelfDecl, false, SelfDecl->getType(),
1451  VK_LValue, PropertyDiagLoc);
1452  MarkDeclRefReferenced(SelfExpr);
1453  Expr *LoadSelfExpr =
1455  CK_LValueToRValue, SelfExpr, nullptr,
1456  VK_RValue);
1457  Expr *lhs =
1458  new (Context) ObjCIvarRefExpr(Ivar,
1459  Ivar->getUsageType(SelfDecl->getType()),
1460  PropertyDiagLoc,
1461  Ivar->getLocation(),
1462  LoadSelfExpr, true, true);
1463  ObjCMethodDecl::param_iterator P = setterMethod->param_begin();
1464  ParmVarDecl *Param = (*P);
1465  QualType T = Param->getType().getNonReferenceType();
1466  DeclRefExpr *rhs = new (Context) DeclRefExpr(Param, false, T,
1467  VK_LValue, PropertyDiagLoc);
1468  MarkDeclRefReferenced(rhs);
1469  ExprResult Res = BuildBinOp(S, PropertyDiagLoc,
1470  BO_Assign, lhs, rhs);
1471  if (property->getPropertyAttributes() &
1473  Expr *callExpr = Res.getAs<Expr>();
1474  if (const CXXOperatorCallExpr *CXXCE =
1475  dyn_cast_or_null<CXXOperatorCallExpr>(callExpr))
1476  if (const FunctionDecl *FuncDecl = CXXCE->getDirectCallee())
1477  if (!FuncDecl->isTrivial())
1478  if (property->getType()->isReferenceType()) {
1479  Diag(PropertyDiagLoc,
1480  diag::err_atomic_property_nontrivial_assign_op)
1481  << property->getType();
1482  Diag(FuncDecl->getLocStart(),
1483  diag::note_callee_decl) << FuncDecl;
1484  }
1485  }
1486  PIDecl->setSetterCXXAssignment(Res.getAs<Expr>());
1487  }
1488  }
1489 
1490  if (IC) {
1491  if (Synthesize)
1492  if (ObjCPropertyImplDecl *PPIDecl =
1493  IC->FindPropertyImplIvarDecl(PropertyIvar)) {
1494  Diag(PropertyLoc, diag::err_duplicate_ivar_use)
1495  << PropertyId << PPIDecl->getPropertyDecl()->getIdentifier()
1496  << PropertyIvar;
1497  Diag(PPIDecl->getLocation(), diag::note_previous_use);
1498  }
1499 
1500  if (ObjCPropertyImplDecl *PPIDecl
1501  = IC->FindPropertyImplDecl(PropertyId, QueryKind)) {
1502  Diag(PropertyLoc, diag::err_property_implemented) << PropertyId;
1503  Diag(PPIDecl->getLocation(), diag::note_previous_declaration);
1504  return nullptr;
1505  }
1506  IC->addPropertyImplementation(PIDecl);
1507  if (getLangOpts().ObjCDefaultSynthProperties &&
1509  !IDecl->isObjCRequiresPropertyDefs()) {
1510  // Diagnose if an ivar was lazily synthesdized due to a previous
1511  // use and if 1) property is @dynamic or 2) property is synthesized
1512  // but it requires an ivar of different name.
1513  ObjCInterfaceDecl *ClassDeclared=nullptr;
1514  ObjCIvarDecl *Ivar = nullptr;
1515  if (!Synthesize)
1516  Ivar = IDecl->lookupInstanceVariable(PropertyId, ClassDeclared);
1517  else {
1518  if (PropertyIvar && PropertyIvar != PropertyId)
1519  Ivar = IDecl->lookupInstanceVariable(PropertyId, ClassDeclared);
1520  }
1521  // Issue diagnostics only if Ivar belongs to current class.
1522  if (Ivar && Ivar->getSynthesize() &&
1523  declaresSameEntity(IC->getClassInterface(), ClassDeclared)) {
1524  Diag(Ivar->getLocation(), diag::err_undeclared_var_use)
1525  << PropertyId;
1526  Ivar->setInvalidDecl();
1527  }
1528  }
1529  } else {
1530  if (Synthesize)
1531  if (ObjCPropertyImplDecl *PPIDecl =
1532  CatImplClass->FindPropertyImplIvarDecl(PropertyIvar)) {
1533  Diag(PropertyDiagLoc, diag::err_duplicate_ivar_use)
1534  << PropertyId << PPIDecl->getPropertyDecl()->getIdentifier()
1535  << PropertyIvar;
1536  Diag(PPIDecl->getLocation(), diag::note_previous_use);
1537  }
1538 
1539  if (ObjCPropertyImplDecl *PPIDecl =
1540  CatImplClass->FindPropertyImplDecl(PropertyId, QueryKind)) {
1541  Diag(PropertyDiagLoc, diag::err_property_implemented) << PropertyId;
1542  Diag(PPIDecl->getLocation(), diag::note_previous_declaration);
1543  return nullptr;
1544  }
1545  CatImplClass->addPropertyImplementation(PIDecl);
1546  }
1547 
1548  return PIDecl;
1549 }
1550 
1551 //===----------------------------------------------------------------------===//
1552 // Helper methods.
1553 //===----------------------------------------------------------------------===//
1554 
1555 /// DiagnosePropertyMismatch - Compares two properties for their
1556 /// attributes and types and warns on a variety of inconsistencies.
1557 ///
1558 void
1560  ObjCPropertyDecl *SuperProperty,
1561  const IdentifierInfo *inheritedName,
1562  bool OverridingProtocolProperty) {
1564  Property->getPropertyAttributes();
1566  SuperProperty->getPropertyAttributes();
1567 
1568  // We allow readonly properties without an explicit ownership
1569  // (assign/unsafe_unretained/weak/retain/strong/copy) in super class
1570  // to be overridden by a property with any explicit ownership in the subclass.
1571  if (!OverridingProtocolProperty &&
1572  !getOwnershipRule(SAttr) && getOwnershipRule(CAttr))
1573  ;
1574  else {
1577  Diag(Property->getLocation(), diag::warn_readonly_property)
1578  << Property->getDeclName() << inheritedName;
1579  if ((CAttr & ObjCPropertyDecl::OBJC_PR_copy)
1580  != (SAttr & ObjCPropertyDecl::OBJC_PR_copy))
1581  Diag(Property->getLocation(), diag::warn_property_attribute)
1582  << Property->getDeclName() << "copy" << inheritedName;
1583  else if (!(SAttr & ObjCPropertyDecl::OBJC_PR_readonly)){
1584  unsigned CAttrRetain =
1585  (CAttr &
1587  unsigned SAttrRetain =
1588  (SAttr &
1590  bool CStrong = (CAttrRetain != 0);
1591  bool SStrong = (SAttrRetain != 0);
1592  if (CStrong != SStrong)
1593  Diag(Property->getLocation(), diag::warn_property_attribute)
1594  << Property->getDeclName() << "retain (or strong)" << inheritedName;
1595  }
1596  }
1597 
1598  // Check for nonatomic; note that nonatomic is effectively
1599  // meaningless for readonly properties, so don't diagnose if the
1600  // atomic property is 'readonly'.
1601  checkAtomicPropertyMismatch(*this, SuperProperty, Property, false);
1602  if (Property->getSetterName() != SuperProperty->getSetterName()) {
1603  Diag(Property->getLocation(), diag::warn_property_attribute)
1604  << Property->getDeclName() << "setter" << inheritedName;
1605  Diag(SuperProperty->getLocation(), diag::note_property_declare);
1606  }
1607  if (Property->getGetterName() != SuperProperty->getGetterName()) {
1608  Diag(Property->getLocation(), diag::warn_property_attribute)
1609  << Property->getDeclName() << "getter" << inheritedName;
1610  Diag(SuperProperty->getLocation(), diag::note_property_declare);
1611  }
1612 
1613  QualType LHSType =
1614  Context.getCanonicalType(SuperProperty->getType());
1615  QualType RHSType =
1616  Context.getCanonicalType(Property->getType());
1617 
1618  if (!Context.propertyTypesAreCompatible(LHSType, RHSType)) {
1619  // Do cases not handled in above.
1620  // FIXME. For future support of covariant property types, revisit this.
1621  bool IncompatibleObjC = false;
1622  QualType ConvertedType;
1623  if (!isObjCPointerConversion(RHSType, LHSType,
1624  ConvertedType, IncompatibleObjC) ||
1625  IncompatibleObjC) {
1626  Diag(Property->getLocation(), diag::warn_property_types_are_incompatible)
1627  << Property->getType() << SuperProperty->getType() << inheritedName;
1628  Diag(SuperProperty->getLocation(), diag::note_property_declare);
1629  }
1630  }
1631 }
1632 
1634  ObjCMethodDecl *GetterMethod,
1635  SourceLocation Loc) {
1636  if (!GetterMethod)
1637  return false;
1638  QualType GetterType = GetterMethod->getReturnType().getNonReferenceType();
1639  QualType PropertyRValueType =
1640  property->getType().getNonReferenceType().getAtomicUnqualifiedType();
1641  bool compat = Context.hasSameType(PropertyRValueType, GetterType);
1642  if (!compat) {
1643  const ObjCObjectPointerType *propertyObjCPtr = nullptr;
1644  const ObjCObjectPointerType *getterObjCPtr = nullptr;
1645  if ((propertyObjCPtr =
1646  PropertyRValueType->getAs<ObjCObjectPointerType>()) &&
1647  (getterObjCPtr = GetterType->getAs<ObjCObjectPointerType>()))
1648  compat = Context.canAssignObjCInterfaces(getterObjCPtr, propertyObjCPtr);
1649  else if (CheckAssignmentConstraints(Loc, GetterType, PropertyRValueType)
1650  != Compatible) {
1651  Diag(Loc, diag::err_property_accessor_type)
1652  << property->getDeclName() << PropertyRValueType
1653  << GetterMethod->getSelector() << GetterType;
1654  Diag(GetterMethod->getLocation(), diag::note_declared_at);
1655  return true;
1656  } else {
1657  compat = true;
1658  QualType lhsType = Context.getCanonicalType(PropertyRValueType);
1659  QualType rhsType =Context.getCanonicalType(GetterType).getUnqualifiedType();
1660  if (lhsType != rhsType && lhsType->isArithmeticType())
1661  compat = false;
1662  }
1663  }
1664 
1665  if (!compat) {
1666  Diag(Loc, diag::warn_accessor_property_type_mismatch)
1667  << property->getDeclName()
1668  << GetterMethod->getSelector();
1669  Diag(GetterMethod->getLocation(), diag::note_declared_at);
1670  return true;
1671  }
1672 
1673  return false;
1674 }
1675 
1676 /// CollectImmediateProperties - This routine collects all properties in
1677 /// the class and its conforming protocols; but not those in its super class.
1678 static void
1681  ObjCContainerDecl::PropertyMap &SuperPropMap,
1682  bool CollectClassPropsOnly = false,
1683  bool IncludeProtocols = true) {
1684  if (ObjCInterfaceDecl *IDecl = dyn_cast<ObjCInterfaceDecl>(CDecl)) {
1685  for (auto *Prop : IDecl->properties()) {
1686  if (CollectClassPropsOnly && !Prop->isClassProperty())
1687  continue;
1688  PropMap[std::make_pair(Prop->getIdentifier(), Prop->isClassProperty())] =
1689  Prop;
1690  }
1691 
1692  // Collect the properties from visible extensions.
1693  for (auto *Ext : IDecl->visible_extensions())
1694  CollectImmediateProperties(Ext, PropMap, SuperPropMap,
1695  CollectClassPropsOnly, IncludeProtocols);
1696 
1697  if (IncludeProtocols) {
1698  // Scan through class's protocols.
1699  for (auto *PI : IDecl->all_referenced_protocols())
1700  CollectImmediateProperties(PI, PropMap, SuperPropMap,
1701  CollectClassPropsOnly);
1702  }
1703  }
1704  if (ObjCCategoryDecl *CATDecl = dyn_cast<ObjCCategoryDecl>(CDecl)) {
1705  for (auto *Prop : CATDecl->properties()) {
1706  if (CollectClassPropsOnly && !Prop->isClassProperty())
1707  continue;
1708  PropMap[std::make_pair(Prop->getIdentifier(), Prop->isClassProperty())] =
1709  Prop;
1710  }
1711  if (IncludeProtocols) {
1712  // Scan through class's protocols.
1713  for (auto *PI : CATDecl->protocols())
1714  CollectImmediateProperties(PI, PropMap, SuperPropMap,
1715  CollectClassPropsOnly);
1716  }
1717  }
1718  else if (ObjCProtocolDecl *PDecl = dyn_cast<ObjCProtocolDecl>(CDecl)) {
1719  for (auto *Prop : PDecl->properties()) {
1720  if (CollectClassPropsOnly && !Prop->isClassProperty())
1721  continue;
1722  ObjCPropertyDecl *PropertyFromSuper =
1723  SuperPropMap[std::make_pair(Prop->getIdentifier(),
1724  Prop->isClassProperty())];
1725  // Exclude property for protocols which conform to class's super-class,
1726  // as super-class has to implement the property.
1727  if (!PropertyFromSuper ||
1728  PropertyFromSuper->getIdentifier() != Prop->getIdentifier()) {
1729  ObjCPropertyDecl *&PropEntry =
1730  PropMap[std::make_pair(Prop->getIdentifier(),
1731  Prop->isClassProperty())];
1732  if (!PropEntry)
1733  PropEntry = Prop;
1734  }
1735  }
1736  // Scan through protocol's protocols.
1737  for (auto *PI : PDecl->protocols())
1738  CollectImmediateProperties(PI, PropMap, SuperPropMap,
1739  CollectClassPropsOnly);
1740  }
1741 }
1742 
1743 /// CollectSuperClassPropertyImplementations - This routine collects list of
1744 /// properties to be implemented in super class(s) and also coming from their
1745 /// conforming protocols.
1747  ObjCInterfaceDecl::PropertyMap &PropMap) {
1748  if (ObjCInterfaceDecl *SDecl = CDecl->getSuperClass()) {
1750  while (SDecl) {
1751  SDecl->collectPropertiesToImplement(PropMap, PO);
1752  SDecl = SDecl->getSuperClass();
1753  }
1754  }
1755 }
1756 
1757 /// IvarBacksCurrentMethodAccessor - This routine returns 'true' if 'IV' is
1758 /// an ivar synthesized for 'Method' and 'Method' is a property accessor
1759 /// declared in class 'IFace'.
1760 bool
1762  ObjCMethodDecl *Method, ObjCIvarDecl *IV) {
1763  if (!IV->getSynthesize())
1764  return false;
1765  ObjCMethodDecl *IMD = IFace->lookupMethod(Method->getSelector(),
1766  Method->isInstanceMethod());
1767  if (!IMD || !IMD->isPropertyAccessor())
1768  return false;
1769 
1770  // look up a property declaration whose one of its accessors is implemented
1771  // by this method.
1772  for (const auto *Property : IFace->instance_properties()) {
1773  if ((Property->getGetterName() == IMD->getSelector() ||
1774  Property->getSetterName() == IMD->getSelector()) &&
1775  (Property->getPropertyIvarDecl() == IV))
1776  return true;
1777  }
1778  // Also look up property declaration in class extension whose one of its
1779  // accessors is implemented by this method.
1780  for (const auto *Ext : IFace->known_extensions())
1781  for (const auto *Property : Ext->instance_properties())
1782  if ((Property->getGetterName() == IMD->getSelector() ||
1783  Property->getSetterName() == IMD->getSelector()) &&
1784  (Property->getPropertyIvarDecl() == IV))
1785  return true;
1786  return false;
1787 }
1788 
1790  ObjCPropertyDecl *Prop) {
1791  bool SuperClassImplementsGetter = false;
1792  bool SuperClassImplementsSetter = false;
1794  SuperClassImplementsSetter = true;
1795 
1796  while (IDecl->getSuperClass()) {
1797  ObjCInterfaceDecl *SDecl = IDecl->getSuperClass();
1798  if (!SuperClassImplementsGetter && SDecl->getInstanceMethod(Prop->getGetterName()))
1799  SuperClassImplementsGetter = true;
1800 
1801  if (!SuperClassImplementsSetter && SDecl->getInstanceMethod(Prop->getSetterName()))
1802  SuperClassImplementsSetter = true;
1803  if (SuperClassImplementsGetter && SuperClassImplementsSetter)
1804  return true;
1805  IDecl = IDecl->getSuperClass();
1806  }
1807  return false;
1808 }
1809 
1810 /// \brief Default synthesizes all properties which must be synthesized
1811 /// in class's \@implementation.
1813  ObjCInterfaceDecl *IDecl,
1814  SourceLocation AtEnd) {
1817  IDecl->collectPropertiesToImplement(PropMap, PropertyOrder);
1818  if (PropMap.empty())
1819  return;
1820  ObjCInterfaceDecl::PropertyMap SuperPropMap;
1821  CollectSuperClassPropertyImplementations(IDecl, SuperPropMap);
1822 
1823  for (unsigned i = 0, e = PropertyOrder.size(); i != e; i++) {
1824  ObjCPropertyDecl *Prop = PropertyOrder[i];
1825  // Is there a matching property synthesize/dynamic?
1826  if (Prop->isInvalidDecl() ||
1827  Prop->isClassProperty() ||
1829  continue;
1830  // Property may have been synthesized by user.
1831  if (IMPDecl->FindPropertyImplDecl(
1832  Prop->getIdentifier(), Prop->getQueryKind()))
1833  continue;
1834  if (IMPDecl->getInstanceMethod(Prop->getGetterName())) {
1836  continue;
1837  if (IMPDecl->getInstanceMethod(Prop->getSetterName()))
1838  continue;
1839  }
1840  if (ObjCPropertyImplDecl *PID =
1841  IMPDecl->FindPropertyImplIvarDecl(Prop->getIdentifier())) {
1842  Diag(Prop->getLocation(), diag::warn_no_autosynthesis_shared_ivar_property)
1843  << Prop->getIdentifier();
1844  if (PID->getLocation().isValid())
1845  Diag(PID->getLocation(), diag::note_property_synthesize);
1846  continue;
1847  }
1848  ObjCPropertyDecl *PropInSuperClass =
1849  SuperPropMap[std::make_pair(Prop->getIdentifier(),
1850  Prop->isClassProperty())];
1851  if (ObjCProtocolDecl *Proto =
1852  dyn_cast<ObjCProtocolDecl>(Prop->getDeclContext())) {
1853  // We won't auto-synthesize properties declared in protocols.
1854  // Suppress the warning if class's superclass implements property's
1855  // getter and implements property's setter (if readwrite property).
1856  // Or, if property is going to be implemented in its super class.
1857  if (!SuperClassImplementsProperty(IDecl, Prop) && !PropInSuperClass) {
1858  Diag(IMPDecl->getLocation(),
1859  diag::warn_auto_synthesizing_protocol_property)
1860  << Prop << Proto;
1861  Diag(Prop->getLocation(), diag::note_property_declare);
1862  std::string FixIt =
1863  (Twine("@synthesize ") + Prop->getName() + ";\n\n").str();
1864  Diag(AtEnd, diag::note_add_synthesize_directive)
1865  << FixItHint::CreateInsertion(AtEnd, FixIt);
1866  }
1867  continue;
1868  }
1869  // If property to be implemented in the super class, ignore.
1870  if (PropInSuperClass) {
1872  (PropInSuperClass->getPropertyAttributes() &
1874  !IMPDecl->getInstanceMethod(Prop->getSetterName()) &&
1875  !IDecl->HasUserDeclaredSetterMethod(Prop)) {
1876  Diag(Prop->getLocation(), diag::warn_no_autosynthesis_property)
1877  << Prop->getIdentifier();
1878  Diag(PropInSuperClass->getLocation(), diag::note_property_declare);
1879  }
1880  else {
1881  Diag(Prop->getLocation(), diag::warn_autosynthesis_property_in_superclass)
1882  << Prop->getIdentifier();
1883  Diag(PropInSuperClass->getLocation(), diag::note_property_declare);
1884  Diag(IMPDecl->getLocation(), diag::note_while_in_implementation);
1885  }
1886  continue;
1887  }
1888  // We use invalid SourceLocations for the synthesized ivars since they
1889  // aren't really synthesized at a particular location; they just exist.
1890  // Saying that they are located at the @implementation isn't really going
1891  // to help users.
1892  ObjCPropertyImplDecl *PIDecl = dyn_cast_or_null<ObjCPropertyImplDecl>(
1894  true,
1895  /* property = */ Prop->getIdentifier(),
1896  /* ivar = */ Prop->getDefaultSynthIvarName(Context),
1897  Prop->getLocation(), Prop->getQueryKind()));
1898  if (PIDecl) {
1899  Diag(Prop->getLocation(), diag::warn_missing_explicit_synthesis);
1900  Diag(IMPDecl->getLocation(), diag::note_while_in_implementation);
1901  }
1902  }
1903 }
1904 
1906  SourceLocation AtEnd) {
1907  if (!LangOpts.ObjCDefaultSynthProperties || LangOpts.ObjCRuntime.isFragile())
1908  return;
1909  ObjCImplementationDecl *IC=dyn_cast_or_null<ObjCImplementationDecl>(D);
1910  if (!IC)
1911  return;
1912  if (ObjCInterfaceDecl* IDecl = IC->getClassInterface())
1913  if (!IDecl->isObjCRequiresPropertyDefs())
1914  DefaultSynthesizeProperties(S, IC, IDecl, AtEnd);
1915 }
1916 
1918  Sema &S, ObjCInterfaceDecl *PrimaryClass, Selector Method,
1919  ObjCImplDecl *IMPDecl, ObjCContainerDecl *CDecl, ObjCCategoryDecl *C,
1920  ObjCPropertyDecl *Prop,
1921  llvm::SmallPtrSet<const ObjCMethodDecl *, 8> &SMap) {
1922  // Check to see if we have a corresponding selector in SMap and with the
1923  // right method type.
1924  auto I = std::find_if(SMap.begin(), SMap.end(),
1925  [&](const ObjCMethodDecl *x) {
1926  return x->getSelector() == Method &&
1927  x->isClassMethod() == Prop->isClassProperty();
1928  });
1929  // When reporting on missing property setter/getter implementation in
1930  // categories, do not report when they are declared in primary class,
1931  // class's protocol, or one of it super classes. This is because,
1932  // the class is going to implement them.
1933  if (I == SMap.end() &&
1934  (PrimaryClass == nullptr ||
1935  !PrimaryClass->lookupPropertyAccessor(Method, C,
1936  Prop->isClassProperty()))) {
1937  unsigned diag =
1938  isa<ObjCCategoryDecl>(CDecl)
1939  ? (Prop->isClassProperty()
1940  ? diag::warn_impl_required_in_category_for_class_property
1941  : diag::warn_setter_getter_impl_required_in_category)
1942  : (Prop->isClassProperty()
1943  ? diag::warn_impl_required_for_class_property
1944  : diag::warn_setter_getter_impl_required);
1945  S.Diag(IMPDecl->getLocation(), diag) << Prop->getDeclName() << Method;
1946  S.Diag(Prop->getLocation(), diag::note_property_declare);
1947  if (S.LangOpts.ObjCDefaultSynthProperties &&
1949  if (ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(CDecl))
1950  if (const ObjCInterfaceDecl *RID = ID->isObjCRequiresPropertyDefs())
1951  S.Diag(RID->getLocation(), diag::note_suppressed_class_declare);
1952  }
1953 }
1954 
1956  ObjCContainerDecl *CDecl,
1957  bool SynthesizeProperties) {
1959  ObjCInterfaceDecl *IDecl = dyn_cast<ObjCInterfaceDecl>(CDecl);
1960 
1961  // Since we don't synthesize class properties, we should emit diagnose even
1962  // if SynthesizeProperties is true.
1963  ObjCContainerDecl::PropertyMap NoNeedToImplPropMap;
1964  // Gather properties which need not be implemented in this class
1965  // or category.
1966  if (!IDecl)
1967  if (ObjCCategoryDecl *C = dyn_cast<ObjCCategoryDecl>(CDecl)) {
1968  // For categories, no need to implement properties declared in
1969  // its primary class (and its super classes) if property is
1970  // declared in one of those containers.
1971  if ((IDecl = C->getClassInterface())) {
1973  IDecl->collectPropertiesToImplement(NoNeedToImplPropMap, PO);
1974  }
1975  }
1976  if (IDecl)
1977  CollectSuperClassPropertyImplementations(IDecl, NoNeedToImplPropMap);
1978 
1979  // When SynthesizeProperties is true, we only check class properties.
1980  CollectImmediateProperties(CDecl, PropMap, NoNeedToImplPropMap,
1981  SynthesizeProperties/*CollectClassPropsOnly*/);
1982 
1983  // Scan the @interface to see if any of the protocols it adopts
1984  // require an explicit implementation, via attribute
1985  // 'objc_protocol_requires_explicit_implementation'.
1986  if (IDecl) {
1987  std::unique_ptr<ObjCContainerDecl::PropertyMap> LazyMap;
1988 
1989  for (auto *PDecl : IDecl->all_referenced_protocols()) {
1990  if (!PDecl->hasAttr<ObjCExplicitProtocolImplAttr>())
1991  continue;
1992  // Lazily construct a set of all the properties in the @interface
1993  // of the class, without looking at the superclass. We cannot
1994  // use the call to CollectImmediateProperties() above as that
1995  // utilizes information from the super class's properties as well
1996  // as scans the adopted protocols. This work only triggers for protocols
1997  // with the attribute, which is very rare, and only occurs when
1998  // analyzing the @implementation.
1999  if (!LazyMap) {
2000  ObjCContainerDecl::PropertyMap NoNeedToImplPropMap;
2001  LazyMap.reset(new ObjCContainerDecl::PropertyMap());
2002  CollectImmediateProperties(CDecl, *LazyMap, NoNeedToImplPropMap,
2003  /* CollectClassPropsOnly */ false,
2004  /* IncludeProtocols */ false);
2005  }
2006  // Add the properties of 'PDecl' to the list of properties that
2007  // need to be implemented.
2008  for (auto *PropDecl : PDecl->properties()) {
2009  if ((*LazyMap)[std::make_pair(PropDecl->getIdentifier(),
2010  PropDecl->isClassProperty())])
2011  continue;
2012  PropMap[std::make_pair(PropDecl->getIdentifier(),
2013  PropDecl->isClassProperty())] = PropDecl;
2014  }
2015  }
2016  }
2017 
2018  if (PropMap.empty())
2019  return;
2020 
2022  for (const auto *I : IMPDecl->property_impls())
2023  PropImplMap.insert(I->getPropertyDecl());
2024 
2025  llvm::SmallPtrSet<const ObjCMethodDecl *, 8> InsMap;
2026  // Collect property accessors implemented in current implementation.
2027  for (const auto *I : IMPDecl->methods())
2028  InsMap.insert(I);
2029 
2030  ObjCCategoryDecl *C = dyn_cast<ObjCCategoryDecl>(CDecl);
2031  ObjCInterfaceDecl *PrimaryClass = nullptr;
2032  if (C && !C->IsClassExtension())
2033  if ((PrimaryClass = C->getClassInterface()))
2034  // Report unimplemented properties in the category as well.
2035  if (ObjCImplDecl *IMP = PrimaryClass->getImplementation()) {
2036  // When reporting on missing setter/getters, do not report when
2037  // setter/getter is implemented in category's primary class
2038  // implementation.
2039  for (const auto *I : IMP->methods())
2040  InsMap.insert(I);
2041  }
2042 
2043  for (ObjCContainerDecl::PropertyMap::iterator
2044  P = PropMap.begin(), E = PropMap.end(); P != E; ++P) {
2045  ObjCPropertyDecl *Prop = P->second;
2046  // Is there a matching property synthesize/dynamic?
2047  if (Prop->isInvalidDecl() ||
2049  PropImplMap.count(Prop) ||
2050  Prop->getAvailability() == AR_Unavailable)
2051  continue;
2052 
2053  // Diagnose unimplemented getters and setters.
2055  PrimaryClass, Prop->getGetterName(), IMPDecl, CDecl, C, Prop, InsMap);
2056  if (!Prop->isReadOnly())
2058  PrimaryClass, Prop->getSetterName(),
2059  IMPDecl, CDecl, C, Prop, InsMap);
2060  }
2061 }
2062 
2064  for (const auto *propertyImpl : impDecl->property_impls()) {
2065  const auto *property = propertyImpl->getPropertyDecl();
2066 
2067  // Warn about null_resettable properties with synthesized setters,
2068  // because the setter won't properly handle nil.
2069  if (propertyImpl->getPropertyImplementation()
2071  (property->getPropertyAttributes() &
2073  property->getGetterMethodDecl() &&
2074  property->getSetterMethodDecl()) {
2075  auto *getterMethod = property->getGetterMethodDecl();
2076  auto *setterMethod = property->getSetterMethodDecl();
2077  if (!impDecl->getInstanceMethod(setterMethod->getSelector()) &&
2078  !impDecl->getInstanceMethod(getterMethod->getSelector())) {
2079  SourceLocation loc = propertyImpl->getLocation();
2080  if (loc.isInvalid())
2081  loc = impDecl->getLocStart();
2082 
2083  Diag(loc, diag::warn_null_resettable_setter)
2084  << setterMethod->getSelector() << property->getDeclName();
2085  }
2086  }
2087  }
2088 }
2089 
2090 void
2092  ObjCInterfaceDecl* IDecl) {
2093  // Rules apply in non-GC mode only
2094  if (getLangOpts().getGC() != LangOptions::NonGC)
2095  return;
2097  for (auto *Prop : IDecl->properties())
2098  PM[std::make_pair(Prop->getIdentifier(), Prop->isClassProperty())] = Prop;
2099  for (const auto *Ext : IDecl->known_extensions())
2100  for (auto *Prop : Ext->properties())
2101  PM[std::make_pair(Prop->getIdentifier(), Prop->isClassProperty())] = Prop;
2102 
2103  for (ObjCContainerDecl::PropertyMap::iterator I = PM.begin(), E = PM.end();
2104  I != E; ++I) {
2105  const ObjCPropertyDecl *Property = I->second;
2106  ObjCMethodDecl *GetterMethod = nullptr;
2107  ObjCMethodDecl *SetterMethod = nullptr;
2108  bool LookedUpGetterSetter = false;
2109 
2110  unsigned Attributes = Property->getPropertyAttributes();
2111  unsigned AttributesAsWritten = Property->getPropertyAttributesAsWritten();
2112 
2113  if (!(AttributesAsWritten & ObjCPropertyDecl::OBJC_PR_atomic) &&
2114  !(AttributesAsWritten & ObjCPropertyDecl::OBJC_PR_nonatomic)) {
2115  GetterMethod = Property->isClassProperty() ?
2116  IMPDecl->getClassMethod(Property->getGetterName()) :
2117  IMPDecl->getInstanceMethod(Property->getGetterName());
2118  SetterMethod = Property->isClassProperty() ?
2119  IMPDecl->getClassMethod(Property->getSetterName()) :
2120  IMPDecl->getInstanceMethod(Property->getSetterName());
2121  LookedUpGetterSetter = true;
2122  if (GetterMethod) {
2123  Diag(GetterMethod->getLocation(),
2124  diag::warn_default_atomic_custom_getter_setter)
2125  << Property->getIdentifier() << 0;
2126  Diag(Property->getLocation(), diag::note_property_declare);
2127  }
2128  if (SetterMethod) {
2129  Diag(SetterMethod->getLocation(),
2130  diag::warn_default_atomic_custom_getter_setter)
2131  << Property->getIdentifier() << 1;
2132  Diag(Property->getLocation(), diag::note_property_declare);
2133  }
2134  }
2135 
2136  // We only care about readwrite atomic property.
2137  if ((Attributes & ObjCPropertyDecl::OBJC_PR_nonatomic) ||
2138  !(Attributes & ObjCPropertyDecl::OBJC_PR_readwrite))
2139  continue;
2140  if (const ObjCPropertyImplDecl *PIDecl = IMPDecl->FindPropertyImplDecl(
2141  Property->getIdentifier(), Property->getQueryKind())) {
2142  if (PIDecl->getPropertyImplementation() == ObjCPropertyImplDecl::Dynamic)
2143  continue;
2144  if (!LookedUpGetterSetter) {
2145  GetterMethod = Property->isClassProperty() ?
2146  IMPDecl->getClassMethod(Property->getGetterName()) :
2147  IMPDecl->getInstanceMethod(Property->getGetterName());
2148  SetterMethod = Property->isClassProperty() ?
2149  IMPDecl->getClassMethod(Property->getSetterName()) :
2150  IMPDecl->getInstanceMethod(Property->getSetterName());
2151  }
2152  if ((GetterMethod && !SetterMethod) || (!GetterMethod && SetterMethod)) {
2153  SourceLocation MethodLoc =
2154  (GetterMethod ? GetterMethod->getLocation()
2155  : SetterMethod->getLocation());
2156  Diag(MethodLoc, diag::warn_atomic_property_rule)
2157  << Property->getIdentifier() << (GetterMethod != nullptr)
2158  << (SetterMethod != nullptr);
2159  // fixit stuff.
2160  if (Property->getLParenLoc().isValid() &&
2161  !(AttributesAsWritten & ObjCPropertyDecl::OBJC_PR_atomic)) {
2162  // @property () ... case.
2163  SourceLocation AfterLParen =
2164  getLocForEndOfToken(Property->getLParenLoc());
2165  StringRef NonatomicStr = AttributesAsWritten? "nonatomic, "
2166  : "nonatomic";
2167  Diag(Property->getLocation(),
2168  diag::note_atomic_property_fixup_suggest)
2169  << FixItHint::CreateInsertion(AfterLParen, NonatomicStr);
2170  } else if (Property->getLParenLoc().isInvalid()) {
2171  //@property id etc.
2172  SourceLocation startLoc =
2173  Property->getTypeSourceInfo()->getTypeLoc().getBeginLoc();
2174  Diag(Property->getLocation(),
2175  diag::note_atomic_property_fixup_suggest)
2176  << FixItHint::CreateInsertion(startLoc, "(nonatomic) ");
2177  }
2178  else
2179  Diag(MethodLoc, diag::note_atomic_property_fixup_suggest);
2180  Diag(Property->getLocation(), diag::note_property_declare);
2181  }
2182  }
2183  }
2184 }
2185 
2187  if (getLangOpts().getGC() == LangOptions::GCOnly)
2188  return;
2189 
2190  for (const auto *PID : D->property_impls()) {
2191  const ObjCPropertyDecl *PD = PID->getPropertyDecl();
2192  if (PD && !PD->hasAttr<NSReturnsNotRetainedAttr>() &&
2193  !PD->isClassProperty() &&
2194  !D->getInstanceMethod(PD->getGetterName())) {
2195  ObjCMethodDecl *method = PD->getGetterMethodDecl();
2196  if (!method)
2197  continue;
2198  ObjCMethodFamily family = method->getMethodFamily();
2199  if (family == OMF_alloc || family == OMF_copy ||
2200  family == OMF_mutableCopy || family == OMF_new) {
2201  if (getLangOpts().ObjCAutoRefCount)
2202  Diag(PD->getLocation(), diag::err_cocoa_naming_owned_rule);
2203  else
2204  Diag(PD->getLocation(), diag::warn_cocoa_naming_owned_rule);
2205 
2206  // Look for a getter explicitly declared alongside the property.
2207  // If we find one, use its location for the note.
2208  SourceLocation noteLoc = PD->getLocation();
2209  SourceLocation fixItLoc;
2210  for (auto *getterRedecl : method->redecls()) {
2211  if (getterRedecl->isImplicit())
2212  continue;
2213  if (getterRedecl->getDeclContext() != PD->getDeclContext())
2214  continue;
2215  noteLoc = getterRedecl->getLocation();
2216  fixItLoc = getterRedecl->getLocEnd();
2217  }
2218 
2220  TokenValue tokens[] = {
2221  tok::kw___attribute, tok::l_paren, tok::l_paren,
2222  PP.getIdentifierInfo("objc_method_family"), tok::l_paren,
2223  PP.getIdentifierInfo("none"), tok::r_paren,
2224  tok::r_paren, tok::r_paren
2225  };
2226  StringRef spelling = "__attribute__((objc_method_family(none)))";
2227  StringRef macroName = PP.getLastMacroWithSpelling(noteLoc, tokens);
2228  if (!macroName.empty())
2229  spelling = macroName;
2230 
2231  auto noteDiag = Diag(noteLoc, diag::note_cocoa_naming_declare_family)
2232  << method->getDeclName() << spelling;
2233  if (fixItLoc.isValid()) {
2234  SmallString<64> fixItText(" ");
2235  fixItText += spelling;
2236  noteDiag << FixItHint::CreateInsertion(fixItLoc, fixItText);
2237  }
2238  }
2239  }
2240  }
2241 }
2242 
2244  const ObjCImplementationDecl *ImplD,
2245  const ObjCInterfaceDecl *IFD) {
2246  assert(IFD->hasDesignatedInitializers());
2247  const ObjCInterfaceDecl *SuperD = IFD->getSuperClass();
2248  if (!SuperD)
2249  return;
2250 
2251  SelectorSet InitSelSet;
2252  for (const auto *I : ImplD->instance_methods())
2253  if (I->getMethodFamily() == OMF_init)
2254  InitSelSet.insert(I->getSelector());
2255 
2257  SuperD->getDesignatedInitializers(DesignatedInits);
2259  I = DesignatedInits.begin(), E = DesignatedInits.end(); I != E; ++I) {
2260  const ObjCMethodDecl *MD = *I;
2261  if (!InitSelSet.count(MD->getSelector())) {
2262  bool Ignore = false;
2263  if (auto *IMD = IFD->getInstanceMethod(MD->getSelector())) {
2264  Ignore = IMD->isUnavailable();
2265  }
2266  if (!Ignore) {
2267  Diag(ImplD->getLocation(),
2268  diag::warn_objc_implementation_missing_designated_init_override)
2269  << MD->getSelector();
2270  Diag(MD->getLocation(), diag::note_objc_designated_init_marked_here);
2271  }
2272  }
2273  }
2274 }
2275 
2276 /// AddPropertyAttrs - Propagates attributes from a property to the
2277 /// implicitly-declared getter or setter for that property.
2278 static void AddPropertyAttrs(Sema &S, ObjCMethodDecl *PropertyMethod,
2280  // Should we just clone all attributes over?
2281  for (const auto *A : Property->attrs()) {
2282  if (isa<DeprecatedAttr>(A) ||
2283  isa<UnavailableAttr>(A) ||
2284  isa<AvailabilityAttr>(A))
2285  PropertyMethod->addAttr(A->clone(S.Context));
2286  }
2287 }
2288 
2289 /// ProcessPropertyDecl - Make sure that any user-defined setter/getter methods
2290 /// have the property type and issue diagnostics if they don't.
2291 /// Also synthesize a getter/setter method if none exist (and update the
2292 /// appropriate lookup tables.
2294  ObjCMethodDecl *GetterMethod, *SetterMethod;
2295  ObjCContainerDecl *CD = cast<ObjCContainerDecl>(property->getDeclContext());
2296  if (CD->isInvalidDecl())
2297  return;
2298 
2299  bool IsClassProperty = property->isClassProperty();
2300  GetterMethod = IsClassProperty ?
2301  CD->getClassMethod(property->getGetterName()) :
2302  CD->getInstanceMethod(property->getGetterName());
2303 
2304  // if setter or getter is not found in class extension, it might be
2305  // in the primary class.
2306  if (!GetterMethod)
2307  if (const ObjCCategoryDecl *CatDecl = dyn_cast<ObjCCategoryDecl>(CD))
2308  if (CatDecl->IsClassExtension())
2309  GetterMethod = IsClassProperty ? CatDecl->getClassInterface()->
2310  getClassMethod(property->getGetterName()) :
2311  CatDecl->getClassInterface()->
2312  getInstanceMethod(property->getGetterName());
2313 
2314  SetterMethod = IsClassProperty ?
2315  CD->getClassMethod(property->getSetterName()) :
2316  CD->getInstanceMethod(property->getSetterName());
2317  if (!SetterMethod)
2318  if (const ObjCCategoryDecl *CatDecl = dyn_cast<ObjCCategoryDecl>(CD))
2319  if (CatDecl->IsClassExtension())
2320  SetterMethod = IsClassProperty ? CatDecl->getClassInterface()->
2321  getClassMethod(property->getSetterName()) :
2322  CatDecl->getClassInterface()->
2323  getInstanceMethod(property->getSetterName());
2324  DiagnosePropertyAccessorMismatch(property, GetterMethod,
2325  property->getLocation());
2326 
2327  if (!property->isReadOnly() && SetterMethod) {
2328  if (Context.getCanonicalType(SetterMethod->getReturnType()) !=
2329  Context.VoidTy)
2330  Diag(SetterMethod->getLocation(), diag::err_setter_type_void);
2331  if (SetterMethod->param_size() != 1 ||
2333  (*SetterMethod->param_begin())->getType().getNonReferenceType(),
2334  property->getType().getNonReferenceType())) {
2335  Diag(property->getLocation(),
2336  diag::warn_accessor_property_type_mismatch)
2337  << property->getDeclName()
2338  << SetterMethod->getSelector();
2339  Diag(SetterMethod->getLocation(), diag::note_declared_at);
2340  }
2341  }
2342 
2343  // Synthesize getter/setter methods if none exist.
2344  // Find the default getter and if one not found, add one.
2345  // FIXME: The synthesized property we set here is misleading. We almost always
2346  // synthesize these methods unless the user explicitly provided prototypes
2347  // (which is odd, but allowed). Sema should be typechecking that the
2348  // declarations jive in that situation (which it is not currently).
2349  if (!GetterMethod) {
2350  // No instance/class method of same name as property getter name was found.
2351  // Declare a getter method and add it to the list of methods
2352  // for this class.
2353  SourceLocation Loc = property->getLocation();
2354 
2355  // The getter returns the declared property type with all qualifiers
2356  // removed.
2357  QualType resultTy = property->getType().getAtomicUnqualifiedType();
2358 
2359  // If the property is null_resettable, the getter returns nonnull.
2360  if (property->getPropertyAttributes() &
2362  QualType modifiedTy = resultTy;
2363  if (auto nullability = AttributedType::stripOuterNullability(modifiedTy)) {
2364  if (*nullability == NullabilityKind::Unspecified)
2366  modifiedTy, modifiedTy);
2367  }
2368  }
2369 
2370  GetterMethod = ObjCMethodDecl::Create(Context, Loc, Loc,
2371  property->getGetterName(),
2372  resultTy, nullptr, CD,
2373  !IsClassProperty, /*isVariadic=*/false,
2374  /*isPropertyAccessor=*/true,
2375  /*isImplicitlyDeclared=*/true, /*isDefined=*/false,
2376  (property->getPropertyImplementation() ==
2380  CD->addDecl(GetterMethod);
2381 
2382  AddPropertyAttrs(*this, GetterMethod, property);
2383 
2384  if (property->hasAttr<NSReturnsNotRetainedAttr>())
2385  GetterMethod->addAttr(NSReturnsNotRetainedAttr::CreateImplicit(Context,
2386  Loc));
2387 
2388  if (property->hasAttr<ObjCReturnsInnerPointerAttr>())
2389  GetterMethod->addAttr(
2390  ObjCReturnsInnerPointerAttr::CreateImplicit(Context, Loc));
2391 
2392  if (const SectionAttr *SA = property->getAttr<SectionAttr>())
2393  GetterMethod->addAttr(
2394  SectionAttr::CreateImplicit(Context, SectionAttr::GNU_section,
2395  SA->getName(), Loc));
2396 
2397  if (getLangOpts().ObjCAutoRefCount)
2398  CheckARCMethodDecl(GetterMethod);
2399  } else
2400  // A user declared getter will be synthesize when @synthesize of
2401  // the property with the same name is seen in the @implementation
2402  GetterMethod->setPropertyAccessor(true);
2403  property->setGetterMethodDecl(GetterMethod);
2404 
2405  // Skip setter if property is read-only.
2406  if (!property->isReadOnly()) {
2407  // Find the default setter and if one not found, add one.
2408  if (!SetterMethod) {
2409  // No instance/class method of same name as property setter name was
2410  // found.
2411  // Declare a setter method and add it to the list of methods
2412  // for this class.
2413  SourceLocation Loc = property->getLocation();
2414 
2415  SetterMethod =
2416  ObjCMethodDecl::Create(Context, Loc, Loc,
2417  property->getSetterName(), Context.VoidTy,
2418  nullptr, CD, !IsClassProperty,
2419  /*isVariadic=*/false,
2420  /*isPropertyAccessor=*/true,
2421  /*isImplicitlyDeclared=*/true,
2422  /*isDefined=*/false,
2423  (property->getPropertyImplementation() ==
2427 
2428  // Remove all qualifiers from the setter's parameter type.
2429  QualType paramTy =
2430  property->getType().getUnqualifiedType().getAtomicUnqualifiedType();
2431 
2432  // If the property is null_resettable, the setter accepts a
2433  // nullable value.
2434  if (property->getPropertyAttributes() &
2436  QualType modifiedTy = paramTy;
2437  if (auto nullability = AttributedType::stripOuterNullability(modifiedTy)){
2438  if (*nullability == NullabilityKind::Unspecified)
2440  modifiedTy, modifiedTy);
2441  }
2442  }
2443 
2444  // Invent the arguments for the setter. We don't bother making a
2445  // nice name for the argument.
2446  ParmVarDecl *Argument = ParmVarDecl::Create(Context, SetterMethod,
2447  Loc, Loc,
2448  property->getIdentifier(),
2449  paramTy,
2450  /*TInfo=*/nullptr,
2451  SC_None,
2452  nullptr);
2453  SetterMethod->setMethodParams(Context, Argument, None);
2454 
2455  AddPropertyAttrs(*this, SetterMethod, property);
2456 
2457  CD->addDecl(SetterMethod);
2458  if (const SectionAttr *SA = property->getAttr<SectionAttr>())
2459  SetterMethod->addAttr(
2460  SectionAttr::CreateImplicit(Context, SectionAttr::GNU_section,
2461  SA->getName(), Loc));
2462  // It's possible for the user to have set a very odd custom
2463  // setter selector that causes it to have a method family.
2464  if (getLangOpts().ObjCAutoRefCount)
2465  CheckARCMethodDecl(SetterMethod);
2466  } else
2467  // A user declared setter will be synthesize when @synthesize of
2468  // the property with the same name is seen in the @implementation
2469  SetterMethod->setPropertyAccessor(true);
2470  property->setSetterMethodDecl(SetterMethod);
2471  }
2472  // Add any synthesized methods to the global pool. This allows us to
2473  // handle the following, which is supported by GCC (and part of the design).
2474  //
2475  // @interface Foo
2476  // @property double bar;
2477  // @end
2478  //
2479  // void thisIsUnfortunate() {
2480  // id foo;
2481  // double bar = [foo bar];
2482  // }
2483  //
2484  if (!IsClassProperty) {
2485  if (GetterMethod)
2486  AddInstanceMethodToGlobalPool(GetterMethod);
2487  if (SetterMethod)
2488  AddInstanceMethodToGlobalPool(SetterMethod);
2489  } else {
2490  if (GetterMethod)
2491  AddFactoryMethodToGlobalPool(GetterMethod);
2492  if (SetterMethod)
2493  AddFactoryMethodToGlobalPool(SetterMethod);
2494  }
2495 
2496  ObjCInterfaceDecl *CurrentClass = dyn_cast<ObjCInterfaceDecl>(CD);
2497  if (!CurrentClass) {
2498  if (ObjCCategoryDecl *Cat = dyn_cast<ObjCCategoryDecl>(CD))
2499  CurrentClass = Cat->getClassInterface();
2500  else if (ObjCImplDecl *Impl = dyn_cast<ObjCImplDecl>(CD))
2501  CurrentClass = Impl->getClassInterface();
2502  }
2503  if (GetterMethod)
2504  CheckObjCMethodOverrides(GetterMethod, CurrentClass, Sema::RTC_Unknown);
2505  if (SetterMethod)
2506  CheckObjCMethodOverrides(SetterMethod, CurrentClass, Sema::RTC_Unknown);
2507 }
2508 
2510  SourceLocation Loc,
2511  unsigned &Attributes,
2512  bool propertyInPrimaryClass) {
2513  // FIXME: Improve the reported location.
2514  if (!PDecl || PDecl->isInvalidDecl())
2515  return;
2516 
2517  if ((Attributes & ObjCDeclSpec::DQ_PR_readonly) &&
2518  (Attributes & ObjCDeclSpec::DQ_PR_readwrite))
2519  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2520  << "readonly" << "readwrite";
2521 
2522  ObjCPropertyDecl *PropertyDecl = cast<ObjCPropertyDecl>(PDecl);
2523  QualType PropertyTy = PropertyDecl->getType();
2524 
2525  // Check for copy or retain on non-object types.
2526  if ((Attributes & (ObjCDeclSpec::DQ_PR_weak | ObjCDeclSpec::DQ_PR_copy |
2528  !PropertyTy->isObjCRetainableType() &&
2529  !PropertyDecl->hasAttr<ObjCNSObjectAttr>()) {
2530  Diag(Loc, diag::err_objc_property_requires_object)
2531  << (Attributes & ObjCDeclSpec::DQ_PR_weak ? "weak" :
2532  Attributes & ObjCDeclSpec::DQ_PR_copy ? "copy" : "retain (or strong)");
2535  PropertyDecl->setInvalidDecl();
2536  }
2537 
2538  // Check for more than one of { assign, copy, retain }.
2539  if (Attributes & ObjCDeclSpec::DQ_PR_assign) {
2540  if (Attributes & ObjCDeclSpec::DQ_PR_copy) {
2541  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2542  << "assign" << "copy";
2543  Attributes &= ~ObjCDeclSpec::DQ_PR_copy;
2544  }
2545  if (Attributes & ObjCDeclSpec::DQ_PR_retain) {
2546  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2547  << "assign" << "retain";
2548  Attributes &= ~ObjCDeclSpec::DQ_PR_retain;
2549  }
2550  if (Attributes & ObjCDeclSpec::DQ_PR_strong) {
2551  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2552  << "assign" << "strong";
2553  Attributes &= ~ObjCDeclSpec::DQ_PR_strong;
2554  }
2555  if (getLangOpts().ObjCAutoRefCount &&
2556  (Attributes & ObjCDeclSpec::DQ_PR_weak)) {
2557  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2558  << "assign" << "weak";
2559  Attributes &= ~ObjCDeclSpec::DQ_PR_weak;
2560  }
2561  if (PropertyDecl->hasAttr<IBOutletCollectionAttr>())
2562  Diag(Loc, diag::warn_iboutletcollection_property_assign);
2563  } else if (Attributes & ObjCDeclSpec::DQ_PR_unsafe_unretained) {
2564  if (Attributes & ObjCDeclSpec::DQ_PR_copy) {
2565  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2566  << "unsafe_unretained" << "copy";
2567  Attributes &= ~ObjCDeclSpec::DQ_PR_copy;
2568  }
2569  if (Attributes & ObjCDeclSpec::DQ_PR_retain) {
2570  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2571  << "unsafe_unretained" << "retain";
2572  Attributes &= ~ObjCDeclSpec::DQ_PR_retain;
2573  }
2574  if (Attributes & ObjCDeclSpec::DQ_PR_strong) {
2575  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2576  << "unsafe_unretained" << "strong";
2577  Attributes &= ~ObjCDeclSpec::DQ_PR_strong;
2578  }
2579  if (getLangOpts().ObjCAutoRefCount &&
2580  (Attributes & ObjCDeclSpec::DQ_PR_weak)) {
2581  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2582  << "unsafe_unretained" << "weak";
2583  Attributes &= ~ObjCDeclSpec::DQ_PR_weak;
2584  }
2585  } else if (Attributes & ObjCDeclSpec::DQ_PR_copy) {
2586  if (Attributes & ObjCDeclSpec::DQ_PR_retain) {
2587  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2588  << "copy" << "retain";
2589  Attributes &= ~ObjCDeclSpec::DQ_PR_retain;
2590  }
2591  if (Attributes & ObjCDeclSpec::DQ_PR_strong) {
2592  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2593  << "copy" << "strong";
2594  Attributes &= ~ObjCDeclSpec::DQ_PR_strong;
2595  }
2596  if (Attributes & ObjCDeclSpec::DQ_PR_weak) {
2597  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2598  << "copy" << "weak";
2599  Attributes &= ~ObjCDeclSpec::DQ_PR_weak;
2600  }
2601  }
2602  else if ((Attributes & ObjCDeclSpec::DQ_PR_retain) &&
2603  (Attributes & ObjCDeclSpec::DQ_PR_weak)) {
2604  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2605  << "retain" << "weak";
2606  Attributes &= ~ObjCDeclSpec::DQ_PR_retain;
2607  }
2608  else if ((Attributes & ObjCDeclSpec::DQ_PR_strong) &&
2609  (Attributes & ObjCDeclSpec::DQ_PR_weak)) {
2610  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2611  << "strong" << "weak";
2612  Attributes &= ~ObjCDeclSpec::DQ_PR_weak;
2613  }
2614 
2615  if (Attributes & ObjCDeclSpec::DQ_PR_weak) {
2616  // 'weak' and 'nonnull' are mutually exclusive.
2617  if (auto nullability = PropertyTy->getNullability(Context)) {
2618  if (*nullability == NullabilityKind::NonNull)
2619  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2620  << "nonnull" << "weak";
2621  }
2622  }
2623 
2624  if ((Attributes & ObjCDeclSpec::DQ_PR_atomic) &&
2625  (Attributes & ObjCDeclSpec::DQ_PR_nonatomic)) {
2626  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2627  << "atomic" << "nonatomic";
2628  Attributes &= ~ObjCDeclSpec::DQ_PR_atomic;
2629  }
2630 
2631  // Warn if user supplied no assignment attribute, property is
2632  // readwrite, and this is an object type.
2633  if (!getOwnershipRule(Attributes) && PropertyTy->isObjCRetainableType()) {
2634  if (Attributes & ObjCDeclSpec::DQ_PR_readonly) {
2635  // do nothing
2636  } else if (getLangOpts().ObjCAutoRefCount) {
2637  // With arc, @property definitions should default to strong when
2638  // not specified.
2640  } else if (PropertyTy->isObjCObjectPointerType()) {
2641  bool isAnyClassTy =
2642  (PropertyTy->isObjCClassType() ||
2643  PropertyTy->isObjCQualifiedClassType());
2644  // In non-gc, non-arc mode, 'Class' is treated as a 'void *' no need to
2645  // issue any warning.
2646  if (isAnyClassTy && getLangOpts().getGC() == LangOptions::NonGC)
2647  ;
2648  else if (propertyInPrimaryClass) {
2649  // Don't issue warning on property with no life time in class
2650  // extension as it is inherited from property in primary class.
2651  // Skip this warning in gc-only mode.
2652  if (getLangOpts().getGC() != LangOptions::GCOnly)
2653  Diag(Loc, diag::warn_objc_property_no_assignment_attribute);
2654 
2655  // If non-gc code warn that this is likely inappropriate.
2656  if (getLangOpts().getGC() == LangOptions::NonGC)
2657  Diag(Loc, diag::warn_objc_property_default_assign_on_object);
2658  }
2659  }
2660 
2661  // FIXME: Implement warning dependent on NSCopying being
2662  // implemented. See also:
2663  // <rdar://5168496&4855821&5607453&5096644&4947311&5698469&4947014&5168496>
2664  // (please trim this list while you are at it).
2665  }
2666 
2667  if (!(Attributes & ObjCDeclSpec::DQ_PR_copy)
2668  &&!(Attributes & ObjCDeclSpec::DQ_PR_readonly)
2669  && getLangOpts().getGC() == LangOptions::GCOnly
2670  && PropertyTy->isBlockPointerType())
2671  Diag(Loc, diag::warn_objc_property_copy_missing_on_block);
2672  else if ((Attributes & ObjCDeclSpec::DQ_PR_retain) &&
2673  !(Attributes & ObjCDeclSpec::DQ_PR_readonly) &&
2674  !(Attributes & ObjCDeclSpec::DQ_PR_strong) &&
2675  PropertyTy->isBlockPointerType())
2676  Diag(Loc, diag::warn_objc_property_retain_of_block);
2677 
2678  if ((Attributes & ObjCDeclSpec::DQ_PR_readonly) &&
2679  (Attributes & ObjCDeclSpec::DQ_PR_setter))
2680  Diag(Loc, diag::warn_objc_readonly_property_has_setter);
2681 }
A call to an overloaded operator written using operator syntax.
Definition: ExprCXX.h:52
SourceLocation getLocForStartOfFile(FileID FID) const
Return the source location corresponding to the first byte of the specified file. ...
ObjCPropertyQueryKind getQueryKind() const
Definition: DeclObjC.h:837
bool RequireNonAbstractType(SourceLocation Loc, QualType T, TypeDiagnoser &Diagnoser)
FunctionDecl - An instance of this class is created to represent a function declaration or definition...
Definition: Decl.h:1618
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:1295
Smart pointer class that efficiently represents Objective-C method names.
A (possibly-)qualified type.
Definition: Type.h:616
ObjCInterfaceDecl * getClassInterface()
Definition: DeclObjC.h:2232
all_protocol_range all_referenced_protocols() const
Definition: DeclObjC.h:1350
ObjCInterfaceDecl * getClassInterface()
Definition: DeclObjC.cpp:1089
bool IvarBacksCurrentMethodAccessor(ObjCInterfaceDecl *IFace, ObjCMethodDecl *Method, ObjCIvarDecl *IV)
IvarBacksCurrentMethodAccessor - This routine returns &#39;true&#39; if &#39;IV&#39; is an ivar synthesized for &#39;Meth...
IdentifierInfo * getIdentifierInfo(StringRef Name) const
Return information about the specified preprocessor identifier token.
Definition: Preprocessor.h:975
bool isObjCPointerConversion(QualType FromType, QualType ToType, QualType &ConvertedType, bool &IncompatibleObjC)
isObjCPointerConversion - Determines whether this is an Objective-C pointer conversion.
bool isArithmeticType() const
Definition: Type.cpp:1852
llvm::DenseMap< std::pair< IdentifierInfo *, unsigned >, ObjCPropertyDecl * > PropertyMap
Definition: DeclObjC.h:1041
Decl * ActOnProperty(Scope *S, SourceLocation AtLoc, SourceLocation LParenLoc, FieldDeclarator &FD, ObjCDeclSpec &ODS, Selector GetterSel, Selector SetterSel, tok::ObjCKeywordKind MethodImplKind, DeclContext *lexicalDC=nullptr)
Defines the SourceManager interface.
void ActOnDocumentableDecl(Decl *D)
Should be called on all declarations that might have attached documentation comments.
Definition: SemaDecl.cpp:11567
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:5768
QualType getQualifiedType(SplitQualType split) const
Un-split a SplitQualType.
Definition: ASTContext.h:1804
SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID)
Emit a diagnostic.
Definition: Sema.h:1243
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:81
void DiagnoseMissingDesignatedInitOverrides(const ObjCImplementationDecl *ImplD, const ObjCInterfaceDecl *IFD)
void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, SourceLocation Loc, unsigned &Attributes, bool propertyInPrimaryClass)
Ensure attributes are consistent with type.
Captures information about "declaration specifiers" specific to Objective-C.
Definition: DeclSpec.h:778
StringRef P
QualType getNonReferenceType() const
If Type is a reference type (e.g., const int&), returns the type that the reference refers to ("const...
Definition: Type.h:5661
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:2180
void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false)
AddFactoryMethodToGlobalPool - Same as above, but for factory methods.
Definition: Sema.h:3525
CanQual< T > getUnqualifiedType() const
Retrieve the unqualified form of this type.
StringRef getLastMacroWithSpelling(SourceLocation Loc, ArrayRef< TokenValue > Tokens) const
Return the name of the macro defined before Loc that has spelling Tokens.
SourceLocation getLocForEndOfToken(SourceLocation Loc, unsigned Offset=0)
Calls Lexer::getLocForEndOfToken()
Definition: Sema.cpp:45
A container of type source information.
Definition: Decl.h:62
void ProcessPropertyDecl(ObjCPropertyDecl *property)
Process the specified property declaration and create decls for the setters and getters as needed...
void setPropertyAccessor(bool isAccessor)
Definition: DeclObjC.h:424
static bool areIncompatiblePropertyAttributes(unsigned Attr1, unsigned Attr2, unsigned Kinds)
Decl * ActOnPropertyImplDecl(Scope *S, SourceLocation AtLoc, SourceLocation PropertyLoc, bool ImplKind, IdentifierInfo *PropertyId, IdentifierInfo *PropertyIvar, SourceLocation PropertyIvarLoc, ObjCPropertyQueryKind QueryKind)
ActOnPropertyImplDecl - This routine performs semantic checks and builds the AST node for a property ...
StringRef getBufferData(FileID FID, bool *Invalid=nullptr) const
Return a StringRef to the source buffer data for the specified FileID.
RAII object to handle the state changes required to synthesize a function body.
Definition: Sema.h:718
const T * getAs() const
Member-template getAs<specific type>&#39;.
Definition: Type.h:6041
static unsigned getOwnershipRule(unsigned attr)
ObjCMethodDecl - Represents an instance or class method declaration.
Definition: DeclObjC.h:113
ObjCPropertyDecl * HandlePropertyInClassExtension(Scope *S, SourceLocation AtLoc, SourceLocation LParenLoc, FieldDeclarator &FD, Selector GetterSel, SourceLocation GetterNameLoc, Selector SetterSel, SourceLocation SetterNameLoc, const bool isReadWrite, unsigned &Attributes, const unsigned AttributesAsWritten, QualType T, TypeSourceInfo *TSI, tok::ObjCKeywordKind MethodImplKind)
Called by ActOnProperty to handle @property declarations in class extensions.
bool ClassImplementsProtocol(ObjCProtocolDecl *lProto, bool lookupCategory, bool RHSIsQualifiedID=false)
ClassImplementsProtocol - Checks that &#39;lProto&#39; protocol has been implemented in IDecl class...
Definition: DeclObjC.cpp:1654
bool isInvalidDecl() const
Definition: DeclBase.h:532
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:2042
ParmVarDecl - Represents a parameter to a function.
Definition: Decl.h:1434
Defines the clang::Expr interface and subclasses for C++ expressions.
Parse and apply any fixits to the source.
The collection of all-type qualifiers we support.
Definition: Type.h:118
IdentifierInfo * getIdentifier() const
getIdentifier - Get the identifier that names this declaration, if there is one.
Definition: Decl.h:232
static void CollectImmediateProperties(ObjCContainerDecl *CDecl, ObjCContainerDecl::PropertyMap &PropMap, ObjCContainerDecl::PropertyMap &SuperPropMap, bool CollectClassPropsOnly=false, bool IncludeProtocols=true)
CollectImmediateProperties - This routine collects all properties in the class and its conforming pro...
DeclarationName getDeclName() const
getDeclName - Get the actual, stored name of the declaration, which may be a special name...
Definition: Decl.h:258
instprop_range instance_properties() const
Definition: DeclObjC.h:952
One of these records is kept for each identifier that is lexed.
SourceLocation getSetterNameLoc() const
Definition: DeclSpec.h:872
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:128
The results of name lookup within a DeclContext.
Definition: DeclBase.h:1146
ObjCMethodDecl * getClassMethod(Selector Sel, bool AllowHidden=false) const
Definition: DeclObjC.h:1029
ObjCMethodFamily
A family of Objective-C methods.
instmeth_range instance_methods() const
Definition: DeclObjC.h:997
method_range methods() const
Definition: DeclObjC.h:982
llvm::SmallDenseSet< const ObjCProtocolDecl *, 8 > ProtocolPropertySet
Definition: DeclObjC.h:1043
Token - This structure provides full information about a lexed token.
Definition: Token.h:35
prop_range properties() const
Definition: DeclObjC.h:939
int Category
Definition: Format.cpp:1304
IdentifierTable & Idents
Definition: ASTContext.h:513
This little struct is used to capture information about structure field declarators, which is basically just a bitfield size.
Definition: DeclSpec.h:2427
An r-value expression (a pr-value in the C++11 taxonomy) produces a temporary value.
Definition: Specifiers.h:106
bool isClassProperty() const
Definition: DeclObjC.h:836
ObjCMethodFamily getMethodFamily() const
Determines the family of this method.
Definition: DeclObjC.cpp:931
void collectPropertiesToImplement(PropertyMap &PM, PropertyDeclOrder &PO) const override
This routine collects list of properties to be implemented in the class.
Definition: DeclObjC.cpp:370
void setObjCWeakProperty(bool Val=true)
Definition: DeclSpec.h:2377
bool isNonFragile() const
Does this runtime follow the set of implied behaviors for a "non-fragile" ABI?
Definition: ObjCRuntime.h:80
ObjCContainerDecl - Represents a container for method declarations.
Definition: DeclObjC.h:919
const FormatToken & Tok
static ObjCPropertyImplDecl * Create(ASTContext &C, DeclContext *DC, SourceLocation atLoc, SourceLocation L, ObjCPropertyDecl *property, Kind PK, ObjCIvarDecl *ivarDecl, SourceLocation ivarLoc)
Definition: DeclObjC.cpp:2208
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:7386
Whether values of this type can be null is (explicitly) unspecified.
PropertyAttributeKind getPropertyAttributes() const
Definition: DeclObjC.h:799
const ObjCInterfaceDecl * isObjCRequiresPropertyDefs() const
isObjCRequiresPropertyDefs - Checks that a class or one of its super classes must not be auto-synthes...
Definition: DeclObjC.cpp:400
void MarkDeclRefReferenced(DeclRefExpr *E, const Expr *Base=nullptr)
Perform reference-marking and odr-use handling for a DeclRefExpr.
Definition: SemaExpr.cpp:14601
static void DiagnoseUnimplementedAccessor(Sema &S, ObjCInterfaceDecl *PrimaryClass, Selector Method, ObjCImplDecl *IMPDecl, ObjCContainerDecl *CDecl, ObjCCategoryDecl *C, ObjCPropertyDecl *Prop, llvm::SmallPtrSet< const ObjCMethodDecl *, 8 > &SMap)
bool isReadOnly() const
isReadOnly - Return true iff the property has a setter.
Definition: DeclObjC.h:820
Values of this type can never be null.
ObjCProtocolDecl * getDefinition()
Retrieve the definition of this protocol, if any.
Definition: DeclObjC.h:2115
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:1118
Represents an Objective-C protocol declaration.
Definition: DeclObjC.h:1985
Preprocessor & PP
Definition: Sema.h:304
const LangOptions & getLangOpts() const
Definition: Sema.h:1166
PropertyControl getPropertyImplementation() const
Definition: DeclObjC.h:885
Represents an ObjC class declaration.
Definition: DeclObjC.h:1108
ObjCPropertyDecl * CreatePropertyDecl(Scope *S, ObjCContainerDecl *CDecl, SourceLocation AtLoc, SourceLocation LParenLoc, FieldDeclarator &FD, Selector GetterSel, SourceLocation GetterNameLoc, Selector SetterSel, SourceLocation SetterNameLoc, const bool isReadWrite, const unsigned Attributes, const unsigned AttributesAsWritten, QualType T, TypeSourceInfo *TSI, tok::ObjCKeywordKind MethodImplKind, DeclContext *lexicalDC=nullptr)
Called by ActOnProperty and HandlePropertyInClassExtension to handle creating the ObjcPropertyDecl fo...
QualType getReturnType() const
Definition: DeclObjC.h:330
IdentifierInfo * getIdentifier() const
Definition: DeclSpec.h:2114
const LangOptions & LangOpts
Definition: Sema.h:303
This object can be modified without requiring retains or releases.
Definition: Type.h:139
void AtomicPropertySetterGetterRules(ObjCImplDecl *IMPDecl, ObjCInterfaceDecl *IDecl)
AtomicPropertySetterGetterRules - This routine enforces the rule (via warning) when atomic property h...
void setGetterCXXConstructor(Expr *getterCXXConstructor)
Definition: DeclObjC.h:2736
void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false)
AddInstanceMethodToGlobalPool - All instance methods in a translation unit are added to a global pool...
Definition: Sema.h:3520
lookup_result lookup(DeclarationName Name) const
lookup - Find the declarations (if any) with the given Name in this context.
Definition: DeclBase.cpp:1507
void CheckObjCMethodOverrides(ObjCMethodDecl *ObjCMethod, ObjCInterfaceDecl *CurrentClass, ResultTypeCompatibilityKind RTC)
ObjCPropertyImplDecl - Represents implementation declaration of a property in a class or category imp...
Definition: DeclObjC.h:2645
bool hasAttr() const
Definition: DeclBase.h:521
Sema - This implements semantic analysis and AST building for C.
Definition: Sema.h:269
static void AddPropertyAttrs(Sema &S, ObjCMethodDecl *PropertyMethod, ObjCPropertyDecl *Property)
AddPropertyAttrs - Propagates attributes from a property to the implicitly-declared getter or setter ...
bool isFragile() const
The inverse of isNonFragile(): does this runtime follow the set of implied behaviors for a "fragile" ...
Definition: ObjCRuntime.h:95
llvm::SmallPtrSet< Selector, 8 > SelectorSet
Definition: Sema.h:3338
static ImplicitCastExpr * Create(const ASTContext &Context, QualType T, CastKind Kind, Expr *Operand, const CXXCastPath *BasePath, ExprValueKind Cat)
Definition: Expr.cpp:1698
void addObjCLifetime(ObjCLifetime type)
Definition: Type.h:316
QualType getUsageType(QualType objectType) const
Retrieve the type of this instance variable when viewed as a member of a specific object type...
Definition: DeclObjC.cpp:1765
TypeSourceInfo * getTrivialTypeSourceInfo(QualType T, SourceLocation Loc=SourceLocation()) const
Allocate a TypeSourceInfo where all locations have been initialized to a given location, which defaults to the empty location.
ID
Defines the address space values used by the address space qualifier of QualType. ...
Definition: AddressSpaces.h:26
SourceLocation getBeginLoc() const
Get the begin source location.
Definition: TypeLoc.cpp:169
bool isObjCGCStrong() const
true when Type is objc&#39;s strong.
Definition: Type.h:1023
Expr - This represents one expression.
Definition: Expr.h:105
known_extensions_range known_extensions() const
Definition: DeclObjC.h:1680
static ObjCMethodDecl * Create(ASTContext &C, SourceLocation beginLoc, SourceLocation endLoc, Selector SelInfo, QualType T, TypeSourceInfo *ReturnTInfo, DeclContext *contextDecl, bool isInstance=true, bool isVariadic=false, bool isPropertyAccessor=false, bool isImplicitlyDeclared=false, bool isDefined=false, ImplementationControl impControl=None, bool HasRelatedResultType=false)
Definition: DeclObjC.cpp:759
Selector getSetterName() const
Definition: DeclObjC.h:868
bool HasUserDeclaredSetterMethod(const ObjCPropertyDecl *P) const
This routine returns &#39;true&#39; if a user declared setter method was found in the class, its protocols, its super classes or categories.
Definition: DeclObjC.cpp:101
IdentifierInfo * getDefaultSynthIvarName(ASTContext &Ctx) const
Get the default name of the synthesized ivar.
Definition: DeclObjC.cpp:202
bool isObjCARCImplicitlyUnretainedType() const
Determines if this type, which must satisfy isObjCLifetimeType(), is implicitly __unsafe_unretained r...
Definition: Type.cpp:3704
TypeSourceInfo * getTypeSourceInfo() const
Definition: DeclObjC.h:786
bool isObjCRetainableType() const
Definition: Type.cpp:3742
static ObjCPropertyDecl::PropertyAttributeKind makePropertyAttributesAsWritten(unsigned Attributes)
void setInvalidDecl(bool Invalid=true)
setInvalidDecl - Indicates the Decl had a semantic error.
Definition: DeclBase.cpp:111
static bool hasWrittenStorageAttribute(ObjCPropertyDecl *Prop, ObjCPropertyQueryKind QueryKind)
Determine whether any storage attributes were written on the property.
Defines the clang::Preprocessor interface.
DeclContext * getDeclContext()
Definition: DeclBase.h:416
ParmVarDecl *const * param_iterator
Definition: DeclObjC.h:350
ObjCInterfaceDecl * getSuperClass() const
Definition: DeclObjC.cpp:314
Stores token information for comparing actual tokens with predefined values.
Definition: Preprocessor.h:66
ObjCPropertyDecl * FindPropertyVisibleInPrimaryClass(IdentifierInfo *PropertyId, ObjCPropertyQueryKind QueryKind) const
FindPropertyVisibleInPrimaryClass - Finds declaration of the property with name &#39;PropertyId&#39; in the p...
Definition: DeclObjC.cpp:346
bool RequireCompleteType(SourceLocation Loc, QualType T, TypeDiagnoser &Diagnoser)
Ensure that the type T is a complete type.
Definition: SemaType.cpp:7107
A std::pair-like structure for storing a qualified type split into its local qualifiers and its local...
Definition: Type.h:559
static Optional< NullabilityKind > stripOuterNullability(QualType &T)
Strip off the top-level nullability annotation on the given type, if it&#39;s there.
Definition: Type.cpp:3654
ObjCIvarDecl * lookupInstanceVariable(IdentifierInfo *IVarName, ObjCInterfaceDecl *&ClassDeclared)
Definition: DeclObjC.cpp:600
clang::ObjCRuntime ObjCRuntime
Definition: LangOptions.h:116
propimpl_range property_impls() const
Definition: DeclObjC.h:2367
Qualifiers Quals
The local qualifiers.
Definition: Type.h:564
bool isInvalid() const
Definition: Ownership.h:159
bool isInstanceMethod() const
Definition: DeclObjC.h:416
Preprocessor & getPreprocessor() const
Definition: Sema.h:1172
Selector getSelector() const
Definition: DeclObjC.h:328
SourceLocation getLocEnd() const LLVM_READONLY
Definition: TypeLoc.h:138
QualType getType() const
Definition: DeclObjC.h:788
const SourceManager & SM
Definition: Format.cpp:1293
static StringRef getIdentifier(const Token &Tok)
ObjCKeywordKind
Provides a namespace for Objective-C keywords which start with an &#39;@&#39;.
Definition: TokenKinds.h:41
QualType getObjCGCQualType(QualType T, Qualifiers::GC gcAttr) const
Return the uniqued reference to the type for an Objective-C gc-qualified type.
SplitQualType split() const
Divides a QualType into its unqualified type and a set of local qualifiers.
Definition: Type.h:5496
void addAttr(Attr *A)
Definition: DeclBase.h:472
SourceLocation getLocStart() const LLVM_READONLY
Definition: DeclBase.h:400
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:1679
Assigning into this object requires the old value to be released and the new value to be retained...
Definition: Type.h:146
Kind
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:1912
IdentifierInfo & get(StringRef Name)
Return the identifier token info for the specified named identifier.
ObjCPropertyQueryKind
Definition: DeclObjC.h:692
static Qualifiers::ObjCLifetime getImpliedARCOwnership(ObjCPropertyDecl::PropertyAttributeKind attrs, QualType type)
getImpliedARCOwnership - Given a set of property attributes and a type, infer an expected lifetime...
ObjCPropertyAttributeKind getPropertyAttributes() const
Definition: DeclSpec.h:832
ObjCCategoryDecl - Represents a category declaration.
Definition: DeclObjC.h:2189
CanQualType VoidTy
Definition: ASTContext.h:963
void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl *IMPDecl, ObjCContainerDecl *CDecl, bool SynthesizeProperties)
DiagnoseUnimplementedProperties - This routine warns on those properties which must be implemented by...
Represents one property declaration in an Objective-C interface.
Definition: DeclObjC.h:704
ObjCMethodDecl * lookupPropertyAccessor(const Selector Sel, const ObjCCategoryDecl *Cat, bool IsClassProperty) const
Lookup a setter or getter in the class hierarchy, including in all categories except for category pas...
Definition: DeclObjC.h:1787
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:2057
QualType getAttributedType(AttributedType::Kind attrKind, QualType modifiedType, QualType equivalentType)
Indicates that the nullability of the type was spelled with a property attribute rather than a type q...
Definition: DeclObjC.h:723
Assigning into this object requires a lifetime extension.
Definition: Type.h:152
bool hasSameUnqualifiedType(QualType T1, QualType T2) const
Determine whether the given types are equivalent after cvr-qualifiers have been removed.
Definition: ASTContext.h:2128
void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D)
llvm::SmallVector< ObjCPropertyDecl *, 8 > PropertyDeclOrder
Definition: DeclObjC.h:1045
void setSetterCXXAssignment(Expr *setterCXXAssignment)
Definition: DeclObjC.h:2743
static void checkARCPropertyImpl(Sema &S, SourceLocation propertyImplLoc, ObjCPropertyDecl *property, ObjCIvarDecl *ivar)
bool isObjCGCWeak() const
true when Type is objc&#39;s weak.
Definition: Type.h:1018
bool propertyTypesAreCompatible(QualType, QualType)
ExprResult PerformCopyInitialization(const InitializedEntity &Entity, SourceLocation EqualLoc, ExprResult Init, bool TopLevelOfInitList=false, bool AllowExplicit=false)
Definition: SemaInit.cpp:8280
const ObjCInterfaceDecl * getClassInterface() const
Definition: DeclObjC.h:2341
redecl_range redecls() const
Returns an iterator range for all the redeclarations of the same decl.
Definition: DeclBase.h:911
static ParmVarDecl * Create(ASTContext &C, DeclContext *DC, SourceLocation StartLoc, SourceLocation IdLoc, IdentifierInfo *Id, QualType T, TypeSourceInfo *TInfo, StorageClass S, Expr *DefArg)
Definition: Decl.cpp:2435
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:1215
static bool SuperClassImplementsProperty(ObjCInterfaceDecl *IDecl, ObjCPropertyDecl *Prop)
PropertyAttributeKind getPropertyAttributesAsWritten() const
Definition: DeclObjC.h:809
const internal::VariadicAllOfMatcher< Type > type
Matches Types in the clang AST.
Definition: ASTMatchers.h:2126
The basic abstraction for the target Objective-C runtime.
Definition: ObjCRuntime.h:25
SourceLocation getLocStart() const LLVM_READONLY
Definition: TypeLoc.h:137
attr_range attrs() const
Definition: DeclBase.h:482
bool CheckARCMethodDecl(ObjCMethodDecl *method)
Check a method declaration for compatibility with the Objective-C ARC conventions.
bool hasObjCLifetime() const
Definition: Type.h:308
bool hasDesignatedInitializers() const
Returns true if this interface decl contains at least one initializer marked with the &#39;objc_designate...
Definition: DeclObjC.cpp:1476
Represents a pointer to an Objective C object.
Definition: Type.h:5219
static ObjCIvarDecl * Create(ASTContext &C, ObjCContainerDecl *DC, SourceLocation StartLoc, SourceLocation IdLoc, IdentifierInfo *Id, QualType T, TypeSourceInfo *TInfo, AccessControl ac, Expr *BW=nullptr, bool synthesized=false)
Definition: DeclObjC.cpp:1699
ObjCImplementationDecl - Represents a class definition - this is where method definitions are specifi...
Definition: DeclObjC.h:2448
void overwritePropertyAttributes(unsigned PRVal)
Definition: DeclObjC.h:805
AvailabilityResult getAvailability(std::string *Message=nullptr, VersionTuple EnclosingVersion=VersionTuple()) const
Determine the availability of the given declaration.
Definition: DeclBase.cpp:562
T * getAttr() const
Definition: DeclBase.h:518
SourceLocation getGetterNameLoc() const
Definition: DeclSpec.h:864
bool hasSameType(QualType T1, QualType T2) const
Determine whether the given types T1 and T2 are equivalent.
Definition: ASTContext.h:2103
const internal::VariadicDynCastAllOfMatcher< Stmt, CallExpr > callExpr
Matches call expressions.
Definition: ASTMatchers.h:1086
static FixItHint CreateInsertion(SourceLocation InsertionLoc, StringRef Code, bool BeforePreviousInsertions=false)
Create a code modification hint that inserts the given code string at a specific location.
Definition: Diagnostic.h:90
void addDecl(Decl *D)
Add the declaration D into this context.
Definition: DeclBase.cpp:1396
bool canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, const ObjCObjectPointerType *RHSOPT)
canAssignObjCInterfaces - Return true if the two interface types are compatible for assignment from R...
ObjCMethodDecl * lookupMethod(Selector Sel, bool isInstance, bool shallowCategoryLookup=false, bool followSuper=true, const ObjCCategoryDecl *C=nullptr) const
lookupMethod - This method returns an instance/class method by looking in the class, its categories, and its super classes (using a linear search).
Definition: DeclObjC.cpp:662
static void checkAtomicPropertyMismatch(Sema &S, ObjCPropertyDecl *OldProperty, ObjCPropertyDecl *NewProperty, bool PropagateAtomicity)
Check for a mismatch in the atomicity of the given properties.
ObjCIvarRefExpr - A reference to an ObjC instance variable.
Definition: ExprObjC.h:479
SourceManager & getSourceManager()
Definition: ASTContext.h:616
bool isObjCObjectType() const
Definition: Type.h:5786
bool IsClassExtension() const
Definition: DeclObjC.h:2292
SourceLocation getIdentifierLoc() const
Definition: DeclSpec.h:2120
CanQualType getCanonicalType(QualType T) const
Return the canonical (structural) type corresponding to the specified potentially non-canonical type ...
Definition: ASTContext.h:2087
TypeLoc getTypeLoc() const
Return the TypeLoc wrapper for the type source info.
Definition: TypeLoc.h:222
static bool LocPropertyAttribute(ASTContext &Context, const char *attrName, SourceLocation LParenLoc, SourceLocation &Loc)
Reading or writing from this object requires a barrier call.
Definition: Type.h:149
Expr * MaybeCreateExprWithCleanups(Expr *SubExpr)
MaybeCreateExprWithCleanups - If the current full-expression requires any cleanups, surround it with a ExprWithCleanups node.
void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD)
ProcessDeclAttributes - Given a declarator (PD) with attributes indicated in it, apply them to D...
Compatible - the types are compatible according to the standard.
Definition: Sema.h:9255
ObjCPropertyImplDecl * FindPropertyImplDecl(IdentifierInfo *propertyId, ObjCPropertyQueryKind queryKind) const
FindPropertyImplDecl - This method looks up a previous ObjCPropertyImplDecl added to the list of thos...
Definition: DeclObjC.cpp:2070
ObjCIvarDecl - Represents an ObjC instance variable.
Definition: DeclObjC.h:1866
static unsigned deducePropertyOwnershipFromType(Sema &S, QualType T)
DeclContext * CurContext
CurContext - This is the current declaration context of parsing.
Definition: Sema.h:317
unsigned kind
All of the diagnostics that can be emitted by the frontend.
Definition: DiagnosticIDs.h:44
static FixItHint CreateReplacement(CharSourceRange RemoveRange, StringRef Code)
Create a code modification hint that replaces the given source range with the given code string...
Definition: Diagnostic.h:127
void setPropertyAttributes(PropertyAttributeKind PRVal)
Definition: DeclObjC.h:802
void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, ObjCPropertyDecl *SuperProperty, const IdentifierInfo *Name, bool OverridingProtocolProperty)
DiagnosePropertyMismatch - Compares two properties for their attributes and types and warns on a vari...
StringRef getName() const
getName - Get the name of identifier for this declaration as a StringRef.
Definition: Decl.h:237
bool isArcWeakrefUnavailable() const
isArcWeakrefUnavailable - Checks for a class or one of its super classes to be incompatible with __we...
Definition: DeclObjC.cpp:390
static ObjCPropertyDecl * SelectPropertyForSynthesisFromProtocols(Sema &S, SourceLocation AtLoc, ObjCInterfaceDecl *ClassDecl, ObjCPropertyDecl *Property)
SelectPropertyForSynthesisFromProtocols - Finds the most appropriate property declaration that should...
bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, ObjCMethodDecl *Getter, SourceLocation Loc)
void DefaultSynthesizeProperties(Scope *S, ObjCImplDecl *IMPDecl, ObjCInterfaceDecl *IDecl, SourceLocation AtEnd)
DefaultSynthesizeProperties - This routine default synthesizes all properties which must be synthesiz...
static const unsigned OwnershipMask
A reference to a declared variable, function, enum, etc.
Definition: Expr.h:953
void addPropertyImplementation(ObjCPropertyImplDecl *property)
Definition: DeclObjC.cpp:2029
static void CheckPropertyAgainstProtocol(Sema &S, ObjCPropertyDecl *Prop, ObjCProtocolDecl *Proto, llvm::SmallPtrSetImpl< ObjCProtocolDecl *> &Known)
Check this Objective-C property against a property declared in the given protocol.
QualType getType() const
Definition: Decl.h:589
#define true
Definition: stdbool.h:32
An l-value expression is a reference to an object with independent storage.
Definition: Specifiers.h:110
A trivial tuple used to represent a source range.
ASTContext & Context
Definition: Sema.h:305
void setLexicalDeclContext(DeclContext *DC)
Definition: DeclBase.cpp:268
ObjCMethodDecl * getGetterMethodDecl() const
Definition: DeclObjC.h:875
QualType getObjCObjectPointerType(QualType OIT) const
Return a ObjCObjectPointerType type for the given ObjCObjectType.
ObjCMethodDecl * getInstanceMethod(Selector Sel, bool AllowHidden=false) const
Definition: DeclObjC.h:1025
ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, BinaryOperatorKind Opc, Expr *LHSExpr, Expr *RHSExpr)
Definition: SemaExpr.cpp:11693
llvm::DenseMap< const Stmt *, CFGBlock * > SMap
Definition: CFGStmtMap.cpp:22
AccessControl getAccessControl() const
Definition: DeclObjC.h:1905
bool isPropertyAccessor() const
Definition: DeclObjC.h:423
Selector getGetterName() const
Definition: DeclObjC.h:861
SourceLocation getLParenLoc() const
Definition: DeclObjC.h:783
void setType(QualType newType)
Definition: Decl.h:590
const LangOptions & getLangOpts() const
Definition: ASTContext.h:659
ObjCCategoryImplDecl - An object of this class encapsulates a category @implementation declaration...
Definition: DeclObjC.h:2396
This class handles loading and caching of source files into memory.
static void checkPropertyDeclWithOwnership(Sema &S, ObjCPropertyDecl *property)
Check the internal consistency of a property declaration with an explicit ownership qualifier...
Attr - This represents one attribute.
Definition: Attr.h:43
SourceLocation getLocation() const
Definition: DeclBase.h:407
TypeSourceInfo * GetTypeForDeclarator(Declarator &D, Scope *S)
GetTypeForDeclarator - Convert the type for the specified declarator to Type instances.
Definition: SemaType.cpp:4823
QualType getType() const
Return the type wrapped by this type source info.
Definition: Decl.h:70
std::pair< FileID, unsigned > getDecomposedLoc(SourceLocation Loc) const
Decompose the specified location into a raw FileID + Offset pair.
Engages in a tight little dance with the lexer to efficiently preprocess tokens.
Definition: Preprocessor.h:98
static bool isIncompatiblePropertyAttribute(unsigned Attr1, unsigned Attr2, ObjCPropertyDecl::PropertyAttributeKind Kind)
Qualifiers::ObjCLifetime getObjCLifetime() const
Returns lifetime attribute of this type.
Definition: Type.h:1028
ObjCCategoryDecl * FindCategoryDeclaration(IdentifierInfo *CategoryId) const
FindCategoryDeclaration - Finds category declaration in the list of categories for this class and ret...
Definition: DeclObjC.cpp:1615