clang  9.0.0svn
SemaObjCProperty.cpp
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1 //===--- SemaObjCProperty.cpp - Semantic Analysis for ObjC @property ------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file implements semantic analysis for Objective C @property and
10 // @synthesize declarations.
11 //
12 //===----------------------------------------------------------------------===//
13 
16 #include "clang/AST/DeclObjC.h"
17 #include "clang/AST/ExprCXX.h"
18 #include "clang/AST/ExprObjC.h"
20 #include "clang/Lex/Lexer.h"
21 #include "clang/Lex/Preprocessor.h"
23 #include "llvm/ADT/DenseSet.h"
24 #include "llvm/ADT/SmallString.h"
25 
26 using namespace clang;
27 
28 //===----------------------------------------------------------------------===//
29 // Grammar actions.
30 //===----------------------------------------------------------------------===//
31 
32 /// getImpliedARCOwnership - Given a set of property attributes and a
33 /// type, infer an expected lifetime. The type's ownership qualification
34 /// is not considered.
35 ///
36 /// Returns OCL_None if the attributes as stated do not imply an ownership.
37 /// Never returns OCL_Autoreleasing.
40  QualType type) {
41  // retain, strong, copy, weak, and unsafe_unretained are only legal
42  // on properties of retainable pointer type.
47  } else if (attrs & ObjCPropertyDecl::OBJC_PR_weak) {
48  return Qualifiers::OCL_Weak;
51  }
52 
53  // assign can appear on other types, so we have to check the
54  // property type.
56  type->isObjCRetainableType()) {
58  }
59 
60  return Qualifiers::OCL_None;
61 }
62 
63 /// Check the internal consistency of a property declaration with
64 /// an explicit ownership qualifier.
66  ObjCPropertyDecl *property) {
67  if (property->isInvalidDecl()) return;
68 
70  = property->getPropertyAttributes();
71  Qualifiers::ObjCLifetime propertyLifetime
72  = property->getType().getObjCLifetime();
73 
74  assert(propertyLifetime != Qualifiers::OCL_None);
75 
76  Qualifiers::ObjCLifetime expectedLifetime
77  = getImpliedARCOwnership(propertyKind, property->getType());
78  if (!expectedLifetime) {
79  // We have a lifetime qualifier but no dominating property
80  // attribute. That's okay, but restore reasonable invariants by
81  // setting the property attribute according to the lifetime
82  // qualifier.
84  if (propertyLifetime == Qualifiers::OCL_Strong) {
86  } else if (propertyLifetime == Qualifiers::OCL_Weak) {
88  } else {
89  assert(propertyLifetime == Qualifiers::OCL_ExplicitNone);
91  }
92  property->setPropertyAttributes(attr);
93  return;
94  }
95 
96  if (propertyLifetime == expectedLifetime) return;
97 
98  property->setInvalidDecl();
99  S.Diag(property->getLocation(),
100  diag::err_arc_inconsistent_property_ownership)
101  << property->getDeclName()
102  << expectedLifetime
103  << propertyLifetime;
104 }
105 
106 /// Check this Objective-C property against a property declared in the
107 /// given protocol.
108 static void
110  ObjCProtocolDecl *Proto,
111  llvm::SmallPtrSetImpl<ObjCProtocolDecl *> &Known) {
112  // Have we seen this protocol before?
113  if (!Known.insert(Proto).second)
114  return;
115 
116  // Look for a property with the same name.
117  DeclContext::lookup_result R = Proto->lookup(Prop->getDeclName());
118  for (unsigned I = 0, N = R.size(); I != N; ++I) {
119  if (ObjCPropertyDecl *ProtoProp = dyn_cast<ObjCPropertyDecl>(R[I])) {
120  S.DiagnosePropertyMismatch(Prop, ProtoProp, Proto->getIdentifier(), true);
121  return;
122  }
123  }
124 
125  // Check this property against any protocols we inherit.
126  for (auto *P : Proto->protocols())
127  CheckPropertyAgainstProtocol(S, Prop, P, Known);
128 }
129 
131  // In GC mode, just look for the __weak qualifier.
132  if (S.getLangOpts().getGC() != LangOptions::NonGC) {
133  if (T.isObjCGCWeak()) return ObjCDeclSpec::DQ_PR_weak;
134 
135  // In ARC/MRC, look for an explicit ownership qualifier.
136  // For some reason, this only applies to __weak.
137  } else if (auto ownership = T.getObjCLifetime()) {
138  switch (ownership) {
147  return 0;
148  }
149  llvm_unreachable("bad qualifier");
150  }
151 
152  return 0;
153 }
154 
155 static const unsigned OwnershipMask =
162 
163 static unsigned getOwnershipRule(unsigned attr) {
164  unsigned result = attr & OwnershipMask;
165 
166  // From an ownership perspective, assign and unsafe_unretained are
167  // identical; make sure one also implies the other.
168  if (result & (ObjCPropertyDecl::OBJC_PR_assign |
172  }
173 
174  return result;
175 }
176 
178  SourceLocation LParenLoc,
179  FieldDeclarator &FD,
180  ObjCDeclSpec &ODS,
181  Selector GetterSel,
182  Selector SetterSel,
183  tok::ObjCKeywordKind MethodImplKind,
184  DeclContext *lexicalDC) {
185  unsigned Attributes = ODS.getPropertyAttributes();
186  FD.D.setObjCWeakProperty((Attributes & ObjCDeclSpec::DQ_PR_weak) != 0);
187  TypeSourceInfo *TSI = GetTypeForDeclarator(FD.D, S);
188  QualType T = TSI->getType();
189  if (!getOwnershipRule(Attributes)) {
190  Attributes |= deducePropertyOwnershipFromType(*this, T);
191  }
192  bool isReadWrite = ((Attributes & ObjCDeclSpec::DQ_PR_readwrite) ||
193  // default is readwrite!
194  !(Attributes & ObjCDeclSpec::DQ_PR_readonly));
195 
196  // Proceed with constructing the ObjCPropertyDecls.
197  ObjCContainerDecl *ClassDecl = cast<ObjCContainerDecl>(CurContext);
198  ObjCPropertyDecl *Res = nullptr;
199  if (ObjCCategoryDecl *CDecl = dyn_cast<ObjCCategoryDecl>(ClassDecl)) {
200  if (CDecl->IsClassExtension()) {
201  Res = HandlePropertyInClassExtension(S, AtLoc, LParenLoc,
202  FD,
203  GetterSel, ODS.getGetterNameLoc(),
204  SetterSel, ODS.getSetterNameLoc(),
205  isReadWrite, Attributes,
206  ODS.getPropertyAttributes(),
207  T, TSI, MethodImplKind);
208  if (!Res)
209  return nullptr;
210  }
211  }
212 
213  if (!Res) {
214  Res = CreatePropertyDecl(S, ClassDecl, AtLoc, LParenLoc, FD,
215  GetterSel, ODS.getGetterNameLoc(), SetterSel,
216  ODS.getSetterNameLoc(), isReadWrite, Attributes,
217  ODS.getPropertyAttributes(), T, TSI,
218  MethodImplKind);
219  if (lexicalDC)
220  Res->setLexicalDeclContext(lexicalDC);
221  }
222 
223  // Validate the attributes on the @property.
224  CheckObjCPropertyAttributes(Res, AtLoc, Attributes,
225  (isa<ObjCInterfaceDecl>(ClassDecl) ||
226  isa<ObjCProtocolDecl>(ClassDecl)));
227 
228  // Check consistency if the type has explicit ownership qualification.
229  if (Res->getType().getObjCLifetime())
230  checkPropertyDeclWithOwnership(*this, Res);
231 
232  llvm::SmallPtrSet<ObjCProtocolDecl *, 16> KnownProtos;
233  if (ObjCInterfaceDecl *IFace = dyn_cast<ObjCInterfaceDecl>(ClassDecl)) {
234  // For a class, compare the property against a property in our superclass.
235  bool FoundInSuper = false;
236  ObjCInterfaceDecl *CurrentInterfaceDecl = IFace;
237  while (ObjCInterfaceDecl *Super = CurrentInterfaceDecl->getSuperClass()) {
238  DeclContext::lookup_result R = Super->lookup(Res->getDeclName());
239  for (unsigned I = 0, N = R.size(); I != N; ++I) {
240  if (ObjCPropertyDecl *SuperProp = dyn_cast<ObjCPropertyDecl>(R[I])) {
241  DiagnosePropertyMismatch(Res, SuperProp, Super->getIdentifier(), false);
242  FoundInSuper = true;
243  break;
244  }
245  }
246  if (FoundInSuper)
247  break;
248  else
249  CurrentInterfaceDecl = Super;
250  }
251 
252  if (FoundInSuper) {
253  // Also compare the property against a property in our protocols.
254  for (auto *P : CurrentInterfaceDecl->protocols()) {
255  CheckPropertyAgainstProtocol(*this, Res, P, KnownProtos);
256  }
257  } else {
258  // Slower path: look in all protocols we referenced.
259  for (auto *P : IFace->all_referenced_protocols()) {
260  CheckPropertyAgainstProtocol(*this, Res, P, KnownProtos);
261  }
262  }
263  } else if (ObjCCategoryDecl *Cat = dyn_cast<ObjCCategoryDecl>(ClassDecl)) {
264  // We don't check if class extension. Because properties in class extension
265  // are meant to override some of the attributes and checking has already done
266  // when property in class extension is constructed.
267  if (!Cat->IsClassExtension())
268  for (auto *P : Cat->protocols())
269  CheckPropertyAgainstProtocol(*this, Res, P, KnownProtos);
270  } else {
271  ObjCProtocolDecl *Proto = cast<ObjCProtocolDecl>(ClassDecl);
272  for (auto *P : Proto->protocols())
273  CheckPropertyAgainstProtocol(*this, Res, P, KnownProtos);
274  }
275 
277  return Res;
278 }
279 
281 makePropertyAttributesAsWritten(unsigned Attributes) {
282  unsigned attributesAsWritten = 0;
283  if (Attributes & ObjCDeclSpec::DQ_PR_readonly)
284  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_readonly;
285  if (Attributes & ObjCDeclSpec::DQ_PR_readwrite)
286  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_readwrite;
287  if (Attributes & ObjCDeclSpec::DQ_PR_getter)
288  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_getter;
289  if (Attributes & ObjCDeclSpec::DQ_PR_setter)
290  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_setter;
291  if (Attributes & ObjCDeclSpec::DQ_PR_assign)
292  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_assign;
293  if (Attributes & ObjCDeclSpec::DQ_PR_retain)
294  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_retain;
295  if (Attributes & ObjCDeclSpec::DQ_PR_strong)
296  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_strong;
297  if (Attributes & ObjCDeclSpec::DQ_PR_weak)
298  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_weak;
299  if (Attributes & ObjCDeclSpec::DQ_PR_copy)
300  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_copy;
301  if (Attributes & ObjCDeclSpec::DQ_PR_unsafe_unretained)
302  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_unsafe_unretained;
303  if (Attributes & ObjCDeclSpec::DQ_PR_nonatomic)
304  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_nonatomic;
305  if (Attributes & ObjCDeclSpec::DQ_PR_atomic)
306  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_atomic;
307  if (Attributes & ObjCDeclSpec::DQ_PR_class)
308  attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_class;
309 
310  return (ObjCPropertyDecl::PropertyAttributeKind)attributesAsWritten;
311 }
312 
313 static bool LocPropertyAttribute( ASTContext &Context, const char *attrName,
314  SourceLocation LParenLoc, SourceLocation &Loc) {
315  if (LParenLoc.isMacroID())
316  return false;
317 
318  SourceManager &SM = Context.getSourceManager();
319  std::pair<FileID, unsigned> locInfo = SM.getDecomposedLoc(LParenLoc);
320  // Try to load the file buffer.
321  bool invalidTemp = false;
322  StringRef file = SM.getBufferData(locInfo.first, &invalidTemp);
323  if (invalidTemp)
324  return false;
325  const char *tokenBegin = file.data() + locInfo.second;
326 
327  // Lex from the start of the given location.
328  Lexer lexer(SM.getLocForStartOfFile(locInfo.first),
329  Context.getLangOpts(),
330  file.begin(), tokenBegin, file.end());
331  Token Tok;
332  do {
333  lexer.LexFromRawLexer(Tok);
334  if (Tok.is(tok::raw_identifier) && Tok.getRawIdentifier() == attrName) {
335  Loc = Tok.getLocation();
336  return true;
337  }
338  } while (Tok.isNot(tok::r_paren));
339  return false;
340 }
341 
342 /// Check for a mismatch in the atomicity of the given properties.
344  ObjCPropertyDecl *OldProperty,
345  ObjCPropertyDecl *NewProperty,
346  bool PropagateAtomicity) {
347  // If the atomicity of both matches, we're done.
348  bool OldIsAtomic =
350  == 0;
351  bool NewIsAtomic =
353  == 0;
354  if (OldIsAtomic == NewIsAtomic) return;
355 
356  // Determine whether the given property is readonly and implicitly
357  // atomic.
358  auto isImplicitlyReadonlyAtomic = [](ObjCPropertyDecl *Property) -> bool {
359  // Is it readonly?
360  auto Attrs = Property->getPropertyAttributes();
361  if ((Attrs & ObjCPropertyDecl::OBJC_PR_readonly) == 0) return false;
362 
363  // Is it nonatomic?
364  if (Attrs & ObjCPropertyDecl::OBJC_PR_nonatomic) return false;
365 
366  // Was 'atomic' specified directly?
367  if (Property->getPropertyAttributesAsWritten() &
369  return false;
370 
371  return true;
372  };
373 
374  // If we're allowed to propagate atomicity, and the new property did
375  // not specify atomicity at all, propagate.
376  const unsigned AtomicityMask =
378  if (PropagateAtomicity &&
379  ((NewProperty->getPropertyAttributesAsWritten() & AtomicityMask) == 0)) {
380  unsigned Attrs = NewProperty->getPropertyAttributes();
381  Attrs = Attrs & ~AtomicityMask;
382  if (OldIsAtomic)
384  else
386 
387  NewProperty->overwritePropertyAttributes(Attrs);
388  return;
389  }
390 
391  // One of the properties is atomic; if it's a readonly property, and
392  // 'atomic' wasn't explicitly specified, we're okay.
393  if ((OldIsAtomic && isImplicitlyReadonlyAtomic(OldProperty)) ||
394  (NewIsAtomic && isImplicitlyReadonlyAtomic(NewProperty)))
395  return;
396 
397  // Diagnose the conflict.
398  const IdentifierInfo *OldContextName;
399  auto *OldDC = OldProperty->getDeclContext();
400  if (auto Category = dyn_cast<ObjCCategoryDecl>(OldDC))
401  OldContextName = Category->getClassInterface()->getIdentifier();
402  else
403  OldContextName = cast<ObjCContainerDecl>(OldDC)->getIdentifier();
404 
405  S.Diag(NewProperty->getLocation(), diag::warn_property_attribute)
406  << NewProperty->getDeclName() << "atomic"
407  << OldContextName;
408  S.Diag(OldProperty->getLocation(), diag::note_property_declare);
409 }
410 
413  SourceLocation AtLoc,
414  SourceLocation LParenLoc,
415  FieldDeclarator &FD,
416  Selector GetterSel,
417  SourceLocation GetterNameLoc,
418  Selector SetterSel,
419  SourceLocation SetterNameLoc,
420  const bool isReadWrite,
421  unsigned &Attributes,
422  const unsigned AttributesAsWritten,
423  QualType T,
424  TypeSourceInfo *TSI,
425  tok::ObjCKeywordKind MethodImplKind) {
426  ObjCCategoryDecl *CDecl = cast<ObjCCategoryDecl>(CurContext);
427  // Diagnose if this property is already in continuation class.
428  DeclContext *DC = CurContext;
429  IdentifierInfo *PropertyId = FD.D.getIdentifier();
430  ObjCInterfaceDecl *CCPrimary = CDecl->getClassInterface();
431 
432  // We need to look in the @interface to see if the @property was
433  // already declared.
434  if (!CCPrimary) {
435  Diag(CDecl->getLocation(), diag::err_continuation_class);
436  return nullptr;
437  }
438 
439  bool isClassProperty = (AttributesAsWritten & ObjCDeclSpec::DQ_PR_class) ||
440  (Attributes & ObjCDeclSpec::DQ_PR_class);
441 
442  // Find the property in the extended class's primary class or
443  // extensions.
445  PropertyId, ObjCPropertyDecl::getQueryKind(isClassProperty));
446 
447  // If we found a property in an extension, complain.
448  if (PIDecl && isa<ObjCCategoryDecl>(PIDecl->getDeclContext())) {
449  Diag(AtLoc, diag::err_duplicate_property);
450  Diag(PIDecl->getLocation(), diag::note_property_declare);
451  return nullptr;
452  }
453 
454  // Check for consistency with the previous declaration, if there is one.
455  if (PIDecl) {
456  // A readonly property declared in the primary class can be refined
457  // by adding a readwrite property within an extension.
458  // Anything else is an error.
459  if (!(PIDecl->isReadOnly() && isReadWrite)) {
460  // Tailor the diagnostics for the common case where a readwrite
461  // property is declared both in the @interface and the continuation.
462  // This is a common error where the user often intended the original
463  // declaration to be readonly.
464  unsigned diag =
465  (Attributes & ObjCDeclSpec::DQ_PR_readwrite) &&
466  (PIDecl->getPropertyAttributesAsWritten() &
468  ? diag::err_use_continuation_class_redeclaration_readwrite
469  : diag::err_use_continuation_class;
470  Diag(AtLoc, diag)
471  << CCPrimary->getDeclName();
472  Diag(PIDecl->getLocation(), diag::note_property_declare);
473  return nullptr;
474  }
475 
476  // Check for consistency of getters.
477  if (PIDecl->getGetterName() != GetterSel) {
478  // If the getter was written explicitly, complain.
479  if (AttributesAsWritten & ObjCDeclSpec::DQ_PR_getter) {
480  Diag(AtLoc, diag::warn_property_redecl_getter_mismatch)
481  << PIDecl->getGetterName() << GetterSel;
482  Diag(PIDecl->getLocation(), diag::note_property_declare);
483  }
484 
485  // Always adopt the getter from the original declaration.
486  GetterSel = PIDecl->getGetterName();
487  Attributes |= ObjCDeclSpec::DQ_PR_getter;
488  }
489 
490  // Check consistency of ownership.
491  unsigned ExistingOwnership
493  unsigned NewOwnership = getOwnershipRule(Attributes);
494  if (ExistingOwnership && NewOwnership != ExistingOwnership) {
495  // If the ownership was written explicitly, complain.
496  if (getOwnershipRule(AttributesAsWritten)) {
497  Diag(AtLoc, diag::warn_property_attr_mismatch);
498  Diag(PIDecl->getLocation(), diag::note_property_declare);
499  }
500 
501  // Take the ownership from the original property.
502  Attributes = (Attributes & ~OwnershipMask) | ExistingOwnership;
503  }
504 
505  // If the redeclaration is 'weak' but the original property is not,
506  if ((Attributes & ObjCPropertyDecl::OBJC_PR_weak) &&
509  PIDecl->getType()->getAs<ObjCObjectPointerType>() &&
511  Diag(AtLoc, diag::warn_property_implicitly_mismatched);
512  Diag(PIDecl->getLocation(), diag::note_property_declare);
513  }
514  }
515 
516  // Create a new ObjCPropertyDecl with the DeclContext being
517  // the class extension.
518  ObjCPropertyDecl *PDecl = CreatePropertyDecl(S, CDecl, AtLoc, LParenLoc,
519  FD, GetterSel, GetterNameLoc,
520  SetterSel, SetterNameLoc,
521  isReadWrite,
522  Attributes, AttributesAsWritten,
523  T, TSI, MethodImplKind, DC);
524 
525  // If there was no declaration of a property with the same name in
526  // the primary class, we're done.
527  if (!PIDecl) {
528  ProcessPropertyDecl(PDecl);
529  return PDecl;
530  }
531 
532  if (!Context.hasSameType(PIDecl->getType(), PDecl->getType())) {
533  bool IncompatibleObjC = false;
534  QualType ConvertedType;
535  // Relax the strict type matching for property type in continuation class.
536  // Allow property object type of continuation class to be different as long
537  // as it narrows the object type in its primary class property. Note that
538  // this conversion is safe only because the wider type is for a 'readonly'
539  // property in primary class and 'narrowed' type for a 'readwrite' property
540  // in continuation class.
541  QualType PrimaryClassPropertyT = Context.getCanonicalType(PIDecl->getType());
542  QualType ClassExtPropertyT = Context.getCanonicalType(PDecl->getType());
543  if (!isa<ObjCObjectPointerType>(PrimaryClassPropertyT) ||
544  !isa<ObjCObjectPointerType>(ClassExtPropertyT) ||
545  (!isObjCPointerConversion(ClassExtPropertyT, PrimaryClassPropertyT,
546  ConvertedType, IncompatibleObjC))
547  || IncompatibleObjC) {
548  Diag(AtLoc,
549  diag::err_type_mismatch_continuation_class) << PDecl->getType();
550  Diag(PIDecl->getLocation(), diag::note_property_declare);
551  return nullptr;
552  }
553  }
554 
555  // Check that atomicity of property in class extension matches the previous
556  // declaration.
557  checkAtomicPropertyMismatch(*this, PIDecl, PDecl, true);
558 
559  // Make sure getter/setter are appropriately synthesized.
560  ProcessPropertyDecl(PDecl);
561  return PDecl;
562 }
563 
565  ObjCContainerDecl *CDecl,
566  SourceLocation AtLoc,
567  SourceLocation LParenLoc,
568  FieldDeclarator &FD,
569  Selector GetterSel,
570  SourceLocation GetterNameLoc,
571  Selector SetterSel,
572  SourceLocation SetterNameLoc,
573  const bool isReadWrite,
574  const unsigned Attributes,
575  const unsigned AttributesAsWritten,
576  QualType T,
577  TypeSourceInfo *TInfo,
578  tok::ObjCKeywordKind MethodImplKind,
579  DeclContext *lexicalDC){
580  IdentifierInfo *PropertyId = FD.D.getIdentifier();
581 
582  // Property defaults to 'assign' if it is readwrite, unless this is ARC
583  // and the type is retainable.
584  bool isAssign;
585  if (Attributes & (ObjCDeclSpec::DQ_PR_assign |
587  isAssign = true;
588  } else if (getOwnershipRule(Attributes) || !isReadWrite) {
589  isAssign = false;
590  } else {
591  isAssign = (!getLangOpts().ObjCAutoRefCount ||
592  !T->isObjCRetainableType());
593  }
594 
595  // Issue a warning if property is 'assign' as default and its
596  // object, which is gc'able conforms to NSCopying protocol
597  if (getLangOpts().getGC() != LangOptions::NonGC &&
598  isAssign && !(Attributes & ObjCDeclSpec::DQ_PR_assign)) {
599  if (const ObjCObjectPointerType *ObjPtrTy =
601  ObjCInterfaceDecl *IDecl = ObjPtrTy->getObjectType()->getInterface();
602  if (IDecl)
603  if (ObjCProtocolDecl* PNSCopying =
604  LookupProtocol(&Context.Idents.get("NSCopying"), AtLoc))
605  if (IDecl->ClassImplementsProtocol(PNSCopying, true))
606  Diag(AtLoc, diag::warn_implements_nscopying) << PropertyId;
607  }
608  }
609 
610  if (T->isObjCObjectType()) {
611  SourceLocation StarLoc = TInfo->getTypeLoc().getEndLoc();
612  StarLoc = getLocForEndOfToken(StarLoc);
613  Diag(FD.D.getIdentifierLoc(), diag::err_statically_allocated_object)
614  << FixItHint::CreateInsertion(StarLoc, "*");
616  SourceLocation TLoc = TInfo->getTypeLoc().getBeginLoc();
617  TInfo = Context.getTrivialTypeSourceInfo(T, TLoc);
618  }
619 
620  DeclContext *DC = CDecl;
622  FD.D.getIdentifierLoc(),
623  PropertyId, AtLoc,
624  LParenLoc, T, TInfo);
625 
626  bool isClassProperty = (AttributesAsWritten & ObjCDeclSpec::DQ_PR_class) ||
627  (Attributes & ObjCDeclSpec::DQ_PR_class);
628  // Class property and instance property can have the same name.
630  DC, PropertyId, ObjCPropertyDecl::getQueryKind(isClassProperty))) {
631  Diag(PDecl->getLocation(), diag::err_duplicate_property);
632  Diag(prevDecl->getLocation(), diag::note_property_declare);
633  PDecl->setInvalidDecl();
634  }
635  else {
636  DC->addDecl(PDecl);
637  if (lexicalDC)
638  PDecl->setLexicalDeclContext(lexicalDC);
639  }
640 
641  if (T->isArrayType() || T->isFunctionType()) {
642  Diag(AtLoc, diag::err_property_type) << T;
643  PDecl->setInvalidDecl();
644  }
645 
646  ProcessDeclAttributes(S, PDecl, FD.D);
647 
648  // Regardless of setter/getter attribute, we save the default getter/setter
649  // selector names in anticipation of declaration of setter/getter methods.
650  PDecl->setGetterName(GetterSel, GetterNameLoc);
651  PDecl->setSetterName(SetterSel, SetterNameLoc);
653  makePropertyAttributesAsWritten(AttributesAsWritten));
654 
655  if (Attributes & ObjCDeclSpec::DQ_PR_readonly)
657 
658  if (Attributes & ObjCDeclSpec::DQ_PR_getter)
660 
661  if (Attributes & ObjCDeclSpec::DQ_PR_setter)
663 
664  if (isReadWrite)
666 
667  if (Attributes & ObjCDeclSpec::DQ_PR_retain)
669 
670  if (Attributes & ObjCDeclSpec::DQ_PR_strong)
672 
673  if (Attributes & ObjCDeclSpec::DQ_PR_weak)
675 
676  if (Attributes & ObjCDeclSpec::DQ_PR_copy)
678 
679  if (Attributes & ObjCDeclSpec::DQ_PR_unsafe_unretained)
681 
682  if (isAssign)
684 
685  // In the semantic attributes, one of nonatomic or atomic is always set.
686  if (Attributes & ObjCDeclSpec::DQ_PR_nonatomic)
688  else
690 
691  // 'unsafe_unretained' is alias for 'assign'.
692  if (Attributes & ObjCDeclSpec::DQ_PR_unsafe_unretained)
694  if (isAssign)
696 
697  if (MethodImplKind == tok::objc_required)
699  else if (MethodImplKind == tok::objc_optional)
701 
702  if (Attributes & ObjCDeclSpec::DQ_PR_nullability)
704 
705  if (Attributes & ObjCDeclSpec::DQ_PR_null_resettable)
707 
708  if (Attributes & ObjCDeclSpec::DQ_PR_class)
710 
711  return PDecl;
712 }
713 
714 static void checkARCPropertyImpl(Sema &S, SourceLocation propertyImplLoc,
715  ObjCPropertyDecl *property,
716  ObjCIvarDecl *ivar) {
717  if (property->isInvalidDecl() || ivar->isInvalidDecl()) return;
718 
719  QualType ivarType = ivar->getType();
720  Qualifiers::ObjCLifetime ivarLifetime = ivarType.getObjCLifetime();
721 
722  // The lifetime implied by the property's attributes.
723  Qualifiers::ObjCLifetime propertyLifetime =
725  property->getType());
726 
727  // We're fine if they match.
728  if (propertyLifetime == ivarLifetime) return;
729 
730  // None isn't a valid lifetime for an object ivar in ARC, and
731  // __autoreleasing is never valid; don't diagnose twice.
732  if ((ivarLifetime == Qualifiers::OCL_None &&
733  S.getLangOpts().ObjCAutoRefCount) ||
734  ivarLifetime == Qualifiers::OCL_Autoreleasing)
735  return;
736 
737  // If the ivar is private, and it's implicitly __unsafe_unretained
738  // becaues of its type, then pretend it was actually implicitly
739  // __strong. This is only sound because we're processing the
740  // property implementation before parsing any method bodies.
741  if (ivarLifetime == Qualifiers::OCL_ExplicitNone &&
742  propertyLifetime == Qualifiers::OCL_Strong &&
744  SplitQualType split = ivarType.split();
745  if (split.Quals.hasObjCLifetime()) {
746  assert(ivarType->isObjCARCImplicitlyUnretainedType());
748  ivarType = S.Context.getQualifiedType(split);
749  ivar->setType(ivarType);
750  return;
751  }
752  }
753 
754  switch (propertyLifetime) {
756  S.Diag(ivar->getLocation(), diag::err_arc_strong_property_ownership)
757  << property->getDeclName()
758  << ivar->getDeclName()
759  << ivarLifetime;
760  break;
761 
763  S.Diag(ivar->getLocation(), diag::err_weak_property)
764  << property->getDeclName()
765  << ivar->getDeclName();
766  break;
767 
769  S.Diag(ivar->getLocation(), diag::err_arc_assign_property_ownership)
770  << property->getDeclName()
771  << ivar->getDeclName()
772  << ((property->getPropertyAttributesAsWritten()
774  break;
775 
777  llvm_unreachable("properties cannot be autoreleasing");
778 
780  // Any other property should be ignored.
781  return;
782  }
783 
784  S.Diag(property->getLocation(), diag::note_property_declare);
785  if (propertyImplLoc.isValid())
786  S.Diag(propertyImplLoc, diag::note_property_synthesize);
787 }
788 
789 /// setImpliedPropertyAttributeForReadOnlyProperty -
790 /// This routine evaludates life-time attributes for a 'readonly'
791 /// property with no known lifetime of its own, using backing
792 /// 'ivar's attribute, if any. If no backing 'ivar', property's
793 /// life-time is assumed 'strong'.
795  ObjCPropertyDecl *property, ObjCIvarDecl *ivar) {
796  Qualifiers::ObjCLifetime propertyLifetime =
798  property->getType());
799  if (propertyLifetime != Qualifiers::OCL_None)
800  return;
801 
802  if (!ivar) {
803  // if no backing ivar, make property 'strong'.
804  property->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_strong);
805  return;
806  }
807  // property assumes owenership of backing ivar.
808  QualType ivarType = ivar->getType();
809  Qualifiers::ObjCLifetime ivarLifetime = ivarType.getObjCLifetime();
810  if (ivarLifetime == Qualifiers::OCL_Strong)
811  property->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_strong);
812  else if (ivarLifetime == Qualifiers::OCL_Weak)
813  property->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_weak);
814 }
815 
816 static bool
817 isIncompatiblePropertyAttribute(unsigned Attr1, unsigned Attr2,
819  return (Attr1 & Kind) != (Attr2 & Kind);
820 }
821 
822 static bool areIncompatiblePropertyAttributes(unsigned Attr1, unsigned Attr2,
823  unsigned Kinds) {
824  return ((Attr1 & Kinds) != 0) != ((Attr2 & Kinds) != 0);
825 }
826 
827 /// SelectPropertyForSynthesisFromProtocols - Finds the most appropriate
828 /// property declaration that should be synthesised in all of the inherited
829 /// protocols. It also diagnoses properties declared in inherited protocols with
830 /// mismatched types or attributes, since any of them can be candidate for
831 /// synthesis.
832 static ObjCPropertyDecl *
834  ObjCInterfaceDecl *ClassDecl,
836  assert(isa<ObjCProtocolDecl>(Property->getDeclContext()) &&
837  "Expected a property from a protocol");
840  for (const auto *PI : ClassDecl->all_referenced_protocols()) {
841  if (const ObjCProtocolDecl *PDecl = PI->getDefinition())
842  PDecl->collectInheritedProtocolProperties(Property, ProtocolSet,
843  Properties);
844  }
845  if (ObjCInterfaceDecl *SDecl = ClassDecl->getSuperClass()) {
846  while (SDecl) {
847  for (const auto *PI : SDecl->all_referenced_protocols()) {
848  if (const ObjCProtocolDecl *PDecl = PI->getDefinition())
849  PDecl->collectInheritedProtocolProperties(Property, ProtocolSet,
850  Properties);
851  }
852  SDecl = SDecl->getSuperClass();
853  }
854  }
855 
856  if (Properties.empty())
857  return Property;
858 
859  ObjCPropertyDecl *OriginalProperty = Property;
860  size_t SelectedIndex = 0;
861  for (const auto &Prop : llvm::enumerate(Properties)) {
862  // Select the 'readwrite' property if such property exists.
863  if (Property->isReadOnly() && !Prop.value()->isReadOnly()) {
864  Property = Prop.value();
865  SelectedIndex = Prop.index();
866  }
867  }
868  if (Property != OriginalProperty) {
869  // Check that the old property is compatible with the new one.
870  Properties[SelectedIndex] = OriginalProperty;
871  }
872 
873  QualType RHSType = S.Context.getCanonicalType(Property->getType());
874  unsigned OriginalAttributes = Property->getPropertyAttributesAsWritten();
875  enum MismatchKind {
876  IncompatibleType = 0,
877  HasNoExpectedAttribute,
878  HasUnexpectedAttribute,
879  DifferentGetter,
880  DifferentSetter
881  };
882  // Represents a property from another protocol that conflicts with the
883  // selected declaration.
884  struct MismatchingProperty {
885  const ObjCPropertyDecl *Prop;
886  MismatchKind Kind;
887  StringRef AttributeName;
888  };
890  for (ObjCPropertyDecl *Prop : Properties) {
891  // Verify the property attributes.
892  unsigned Attr = Prop->getPropertyAttributesAsWritten();
893  if (Attr != OriginalAttributes) {
894  auto Diag = [&](bool OriginalHasAttribute, StringRef AttributeName) {
895  MismatchKind Kind = OriginalHasAttribute ? HasNoExpectedAttribute
896  : HasUnexpectedAttribute;
897  Mismatches.push_back({Prop, Kind, AttributeName});
898  };
899  // The ownership might be incompatible unless the property has no explicit
900  // ownership.
901  bool HasOwnership = (Attr & (ObjCPropertyDecl::OBJC_PR_retain |
907  if (HasOwnership &&
908  isIncompatiblePropertyAttribute(OriginalAttributes, Attr,
910  Diag(OriginalAttributes & ObjCPropertyDecl::OBJC_PR_copy, "copy");
911  continue;
912  }
913  if (HasOwnership && areIncompatiblePropertyAttributes(
914  OriginalAttributes, Attr,
917  Diag(OriginalAttributes & (ObjCPropertyDecl::OBJC_PR_retain |
919  "retain (or strong)");
920  continue;
921  }
922  if (isIncompatiblePropertyAttribute(OriginalAttributes, Attr,
924  Diag(OriginalAttributes & ObjCPropertyDecl::OBJC_PR_atomic, "atomic");
925  continue;
926  }
927  }
928  if (Property->getGetterName() != Prop->getGetterName()) {
929  Mismatches.push_back({Prop, DifferentGetter, ""});
930  continue;
931  }
932  if (!Property->isReadOnly() && !Prop->isReadOnly() &&
933  Property->getSetterName() != Prop->getSetterName()) {
934  Mismatches.push_back({Prop, DifferentSetter, ""});
935  continue;
936  }
937  QualType LHSType = S.Context.getCanonicalType(Prop->getType());
938  if (!S.Context.propertyTypesAreCompatible(LHSType, RHSType)) {
939  bool IncompatibleObjC = false;
940  QualType ConvertedType;
941  if (!S.isObjCPointerConversion(RHSType, LHSType, ConvertedType, IncompatibleObjC)
942  || IncompatibleObjC) {
943  Mismatches.push_back({Prop, IncompatibleType, ""});
944  continue;
945  }
946  }
947  }
948 
949  if (Mismatches.empty())
950  return Property;
951 
952  // Diagnose incompability.
953  {
954  bool HasIncompatibleAttributes = false;
955  for (const auto &Note : Mismatches)
956  HasIncompatibleAttributes =
957  Note.Kind != IncompatibleType ? true : HasIncompatibleAttributes;
958  // Promote the warning to an error if there are incompatible attributes or
959  // incompatible types together with readwrite/readonly incompatibility.
960  auto Diag = S.Diag(Property->getLocation(),
961  Property != OriginalProperty || HasIncompatibleAttributes
962  ? diag::err_protocol_property_mismatch
963  : diag::warn_protocol_property_mismatch);
964  Diag << Mismatches[0].Kind;
965  switch (Mismatches[0].Kind) {
966  case IncompatibleType:
967  Diag << Property->getType();
968  break;
969  case HasNoExpectedAttribute:
970  case HasUnexpectedAttribute:
971  Diag << Mismatches[0].AttributeName;
972  break;
973  case DifferentGetter:
974  Diag << Property->getGetterName();
975  break;
976  case DifferentSetter:
977  Diag << Property->getSetterName();
978  break;
979  }
980  }
981  for (const auto &Note : Mismatches) {
982  auto Diag =
983  S.Diag(Note.Prop->getLocation(), diag::note_protocol_property_declare)
984  << Note.Kind;
985  switch (Note.Kind) {
986  case IncompatibleType:
987  Diag << Note.Prop->getType();
988  break;
989  case HasNoExpectedAttribute:
990  case HasUnexpectedAttribute:
991  Diag << Note.AttributeName;
992  break;
993  case DifferentGetter:
994  Diag << Note.Prop->getGetterName();
995  break;
996  case DifferentSetter:
997  Diag << Note.Prop->getSetterName();
998  break;
999  }
1000  }
1001  if (AtLoc.isValid())
1002  S.Diag(AtLoc, diag::note_property_synthesize);
1003 
1004  return Property;
1005 }
1006 
1007 /// Determine whether any storage attributes were written on the property.
1009  ObjCPropertyQueryKind QueryKind) {
1010  if (Prop->getPropertyAttributesAsWritten() & OwnershipMask) return true;
1011 
1012  // If this is a readwrite property in a class extension that refines
1013  // a readonly property in the original class definition, check it as
1014  // well.
1015 
1016  // If it's a readonly property, we're not interested.
1017  if (Prop->isReadOnly()) return false;
1018 
1019  // Is it declared in an extension?
1020  auto Category = dyn_cast<ObjCCategoryDecl>(Prop->getDeclContext());
1021  if (!Category || !Category->IsClassExtension()) return false;
1022 
1023  // Find the corresponding property in the primary class definition.
1024  auto OrigClass = Category->getClassInterface();
1025  for (auto Found : OrigClass->lookup(Prop->getDeclName())) {
1026  if (ObjCPropertyDecl *OrigProp = dyn_cast<ObjCPropertyDecl>(Found))
1027  return OrigProp->getPropertyAttributesAsWritten() & OwnershipMask;
1028  }
1029 
1030  // Look through all of the protocols.
1031  for (const auto *Proto : OrigClass->all_referenced_protocols()) {
1032  if (ObjCPropertyDecl *OrigProp = Proto->FindPropertyDeclaration(
1033  Prop->getIdentifier(), QueryKind))
1034  return OrigProp->getPropertyAttributesAsWritten() & OwnershipMask;
1035  }
1036 
1037  return false;
1038 }
1039 
1040 /// ActOnPropertyImplDecl - This routine performs semantic checks and
1041 /// builds the AST node for a property implementation declaration; declared
1042 /// as \@synthesize or \@dynamic.
1043 ///
1045  SourceLocation AtLoc,
1046  SourceLocation PropertyLoc,
1047  bool Synthesize,
1048  IdentifierInfo *PropertyId,
1049  IdentifierInfo *PropertyIvar,
1050  SourceLocation PropertyIvarLoc,
1051  ObjCPropertyQueryKind QueryKind) {
1052  ObjCContainerDecl *ClassImpDecl =
1053  dyn_cast<ObjCContainerDecl>(CurContext);
1054  // Make sure we have a context for the property implementation declaration.
1055  if (!ClassImpDecl) {
1056  Diag(AtLoc, diag::err_missing_property_context);
1057  return nullptr;
1058  }
1059  if (PropertyIvarLoc.isInvalid())
1060  PropertyIvarLoc = PropertyLoc;
1061  SourceLocation PropertyDiagLoc = PropertyLoc;
1062  if (PropertyDiagLoc.isInvalid())
1063  PropertyDiagLoc = ClassImpDecl->getBeginLoc();
1064  ObjCPropertyDecl *property = nullptr;
1065  ObjCInterfaceDecl *IDecl = nullptr;
1066  // Find the class or category class where this property must have
1067  // a declaration.
1068  ObjCImplementationDecl *IC = nullptr;
1069  ObjCCategoryImplDecl *CatImplClass = nullptr;
1070  if ((IC = dyn_cast<ObjCImplementationDecl>(ClassImpDecl))) {
1071  IDecl = IC->getClassInterface();
1072  // We always synthesize an interface for an implementation
1073  // without an interface decl. So, IDecl is always non-zero.
1074  assert(IDecl &&
1075  "ActOnPropertyImplDecl - @implementation without @interface");
1076 
1077  // Look for this property declaration in the @implementation's @interface
1078  property = IDecl->FindPropertyDeclaration(PropertyId, QueryKind);
1079  if (!property) {
1080  Diag(PropertyLoc, diag::err_bad_property_decl) << IDecl->getDeclName();
1081  return nullptr;
1082  }
1083  if (property->isClassProperty() && Synthesize) {
1084  Diag(PropertyLoc, diag::err_synthesize_on_class_property) << PropertyId;
1085  return nullptr;
1086  }
1087  unsigned PIkind = property->getPropertyAttributesAsWritten();
1088  if ((PIkind & (ObjCPropertyDecl::OBJC_PR_atomic |
1090  if (AtLoc.isValid())
1091  Diag(AtLoc, diag::warn_implicit_atomic_property);
1092  else
1093  Diag(IC->getLocation(), diag::warn_auto_implicit_atomic_property);
1094  Diag(property->getLocation(), diag::note_property_declare);
1095  }
1096 
1097  if (const ObjCCategoryDecl *CD =
1098  dyn_cast<ObjCCategoryDecl>(property->getDeclContext())) {
1099  if (!CD->IsClassExtension()) {
1100  Diag(PropertyLoc, diag::err_category_property) << CD->getDeclName();
1101  Diag(property->getLocation(), diag::note_property_declare);
1102  return nullptr;
1103  }
1104  }
1105  if (Synthesize&&
1107  property->hasAttr<IBOutletAttr>() &&
1108  !AtLoc.isValid()) {
1109  bool ReadWriteProperty = false;
1110  // Search into the class extensions and see if 'readonly property is
1111  // redeclared 'readwrite', then no warning is to be issued.
1112  for (auto *Ext : IDecl->known_extensions()) {
1113  DeclContext::lookup_result R = Ext->lookup(property->getDeclName());
1114  if (!R.empty())
1115  if (ObjCPropertyDecl *ExtProp = dyn_cast<ObjCPropertyDecl>(R[0])) {
1116  PIkind = ExtProp->getPropertyAttributesAsWritten();
1117  if (PIkind & ObjCPropertyDecl::OBJC_PR_readwrite) {
1118  ReadWriteProperty = true;
1119  break;
1120  }
1121  }
1122  }
1123 
1124  if (!ReadWriteProperty) {
1125  Diag(property->getLocation(), diag::warn_auto_readonly_iboutlet_property)
1126  << property;
1127  SourceLocation readonlyLoc;
1128  if (LocPropertyAttribute(Context, "readonly",
1129  property->getLParenLoc(), readonlyLoc)) {
1130  SourceLocation endLoc =
1131  readonlyLoc.getLocWithOffset(strlen("readonly")-1);
1132  SourceRange ReadonlySourceRange(readonlyLoc, endLoc);
1133  Diag(property->getLocation(),
1134  diag::note_auto_readonly_iboutlet_fixup_suggest) <<
1135  FixItHint::CreateReplacement(ReadonlySourceRange, "readwrite");
1136  }
1137  }
1138  }
1139  if (Synthesize && isa<ObjCProtocolDecl>(property->getDeclContext()))
1140  property = SelectPropertyForSynthesisFromProtocols(*this, AtLoc, IDecl,
1141  property);
1142 
1143  } else if ((CatImplClass = dyn_cast<ObjCCategoryImplDecl>(ClassImpDecl))) {
1144  if (Synthesize) {
1145  Diag(AtLoc, diag::err_synthesize_category_decl);
1146  return nullptr;
1147  }
1148  IDecl = CatImplClass->getClassInterface();
1149  if (!IDecl) {
1150  Diag(AtLoc, diag::err_missing_property_interface);
1151  return nullptr;
1152  }
1154  IDecl->FindCategoryDeclaration(CatImplClass->getIdentifier());
1155 
1156  // If category for this implementation not found, it is an error which
1157  // has already been reported eralier.
1158  if (!Category)
1159  return nullptr;
1160  // Look for this property declaration in @implementation's category
1161  property = Category->FindPropertyDeclaration(PropertyId, QueryKind);
1162  if (!property) {
1163  Diag(PropertyLoc, diag::err_bad_category_property_decl)
1164  << Category->getDeclName();
1165  return nullptr;
1166  }
1167  } else {
1168  Diag(AtLoc, diag::err_bad_property_context);
1169  return nullptr;
1170  }
1171  ObjCIvarDecl *Ivar = nullptr;
1172  bool CompleteTypeErr = false;
1173  bool compat = true;
1174  // Check that we have a valid, previously declared ivar for @synthesize
1175  if (Synthesize) {
1176  // @synthesize
1177  if (!PropertyIvar)
1178  PropertyIvar = PropertyId;
1179  // Check that this is a previously declared 'ivar' in 'IDecl' interface
1180  ObjCInterfaceDecl *ClassDeclared;
1181  Ivar = IDecl->lookupInstanceVariable(PropertyIvar, ClassDeclared);
1182  QualType PropType = property->getType();
1183  QualType PropertyIvarType = PropType.getNonReferenceType();
1184 
1185  if (RequireCompleteType(PropertyDiagLoc, PropertyIvarType,
1186  diag::err_incomplete_synthesized_property,
1187  property->getDeclName())) {
1188  Diag(property->getLocation(), diag::note_property_declare);
1189  CompleteTypeErr = true;
1190  }
1191 
1192  if (getLangOpts().ObjCAutoRefCount &&
1193  (property->getPropertyAttributesAsWritten() &
1195  PropertyIvarType->isObjCRetainableType()) {
1197  }
1198 
1200  = property->getPropertyAttributes();
1201 
1202  bool isARCWeak = false;
1203  if (kind & ObjCPropertyDecl::OBJC_PR_weak) {
1204  // Add GC __weak to the ivar type if the property is weak.
1205  if (getLangOpts().getGC() != LangOptions::NonGC) {
1206  assert(!getLangOpts().ObjCAutoRefCount);
1207  if (PropertyIvarType.isObjCGCStrong()) {
1208  Diag(PropertyDiagLoc, diag::err_gc_weak_property_strong_type);
1209  Diag(property->getLocation(), diag::note_property_declare);
1210  } else {
1211  PropertyIvarType =
1212  Context.getObjCGCQualType(PropertyIvarType, Qualifiers::Weak);
1213  }
1214 
1215  // Otherwise, check whether ARC __weak is enabled and works with
1216  // the property type.
1217  } else {
1218  if (!getLangOpts().ObjCWeak) {
1219  // Only complain here when synthesizing an ivar.
1220  if (!Ivar) {
1221  Diag(PropertyDiagLoc,
1222  getLangOpts().ObjCWeakRuntime
1223  ? diag::err_synthesizing_arc_weak_property_disabled
1224  : diag::err_synthesizing_arc_weak_property_no_runtime);
1225  Diag(property->getLocation(), diag::note_property_declare);
1226  }
1227  CompleteTypeErr = true; // suppress later diagnostics about the ivar
1228  } else {
1229  isARCWeak = true;
1230  if (const ObjCObjectPointerType *ObjT =
1231  PropertyIvarType->getAs<ObjCObjectPointerType>()) {
1232  const ObjCInterfaceDecl *ObjI = ObjT->getInterfaceDecl();
1233  if (ObjI && ObjI->isArcWeakrefUnavailable()) {
1234  Diag(property->getLocation(),
1235  diag::err_arc_weak_unavailable_property)
1236  << PropertyIvarType;
1237  Diag(ClassImpDecl->getLocation(), diag::note_implemented_by_class)
1238  << ClassImpDecl->getName();
1239  }
1240  }
1241  }
1242  }
1243  }
1244 
1245  if (AtLoc.isInvalid()) {
1246  // Check when default synthesizing a property that there is
1247  // an ivar matching property name and issue warning; since this
1248  // is the most common case of not using an ivar used for backing
1249  // property in non-default synthesis case.
1250  ObjCInterfaceDecl *ClassDeclared=nullptr;
1251  ObjCIvarDecl *originalIvar =
1252  IDecl->lookupInstanceVariable(property->getIdentifier(),
1253  ClassDeclared);
1254  if (originalIvar) {
1255  Diag(PropertyDiagLoc,
1256  diag::warn_autosynthesis_property_ivar_match)
1257  << PropertyId << (Ivar == nullptr) << PropertyIvar
1258  << originalIvar->getIdentifier();
1259  Diag(property->getLocation(), diag::note_property_declare);
1260  Diag(originalIvar->getLocation(), diag::note_ivar_decl);
1261  }
1262  }
1263 
1264  if (!Ivar) {
1265  // In ARC, give the ivar a lifetime qualifier based on the
1266  // property attributes.
1267  if ((getLangOpts().ObjCAutoRefCount || isARCWeak) &&
1268  !PropertyIvarType.getObjCLifetime() &&
1269  PropertyIvarType->isObjCRetainableType()) {
1270 
1271  // It's an error if we have to do this and the user didn't
1272  // explicitly write an ownership attribute on the property.
1273  if (!hasWrittenStorageAttribute(property, QueryKind) &&
1275  Diag(PropertyDiagLoc,
1276  diag::err_arc_objc_property_default_assign_on_object);
1277  Diag(property->getLocation(), diag::note_property_declare);
1278  } else {
1279  Qualifiers::ObjCLifetime lifetime =
1280  getImpliedARCOwnership(kind, PropertyIvarType);
1281  assert(lifetime && "no lifetime for property?");
1282 
1283  Qualifiers qs;
1284  qs.addObjCLifetime(lifetime);
1285  PropertyIvarType = Context.getQualifiedType(PropertyIvarType, qs);
1286  }
1287  }
1288 
1289  Ivar = ObjCIvarDecl::Create(Context, ClassImpDecl,
1290  PropertyIvarLoc,PropertyIvarLoc, PropertyIvar,
1291  PropertyIvarType, /*Dinfo=*/nullptr,
1293  (Expr *)nullptr, true);
1294  if (RequireNonAbstractType(PropertyIvarLoc,
1295  PropertyIvarType,
1296  diag::err_abstract_type_in_decl,
1298  Diag(property->getLocation(), diag::note_property_declare);
1299  // An abstract type is as bad as an incomplete type.
1300  CompleteTypeErr = true;
1301  }
1302  if (!CompleteTypeErr) {
1303  const RecordType *RecordTy = PropertyIvarType->getAs<RecordType>();
1304  if (RecordTy && RecordTy->getDecl()->hasFlexibleArrayMember()) {
1305  Diag(PropertyIvarLoc, diag::err_synthesize_variable_sized_ivar)
1306  << PropertyIvarType;
1307  CompleteTypeErr = true; // suppress later diagnostics about the ivar
1308  }
1309  }
1310  if (CompleteTypeErr)
1311  Ivar->setInvalidDecl();
1312  ClassImpDecl->addDecl(Ivar);
1313  IDecl->makeDeclVisibleInContext(Ivar);
1314 
1316  Diag(PropertyDiagLoc, diag::err_missing_property_ivar_decl)
1317  << PropertyId;
1318  // Note! I deliberately want it to fall thru so, we have a
1319  // a property implementation and to avoid future warnings.
1320  } else if (getLangOpts().ObjCRuntime.isNonFragile() &&
1321  !declaresSameEntity(ClassDeclared, IDecl)) {
1322  Diag(PropertyDiagLoc, diag::err_ivar_in_superclass_use)
1323  << property->getDeclName() << Ivar->getDeclName()
1324  << ClassDeclared->getDeclName();
1325  Diag(Ivar->getLocation(), diag::note_previous_access_declaration)
1326  << Ivar << Ivar->getName();
1327  // Note! I deliberately want it to fall thru so more errors are caught.
1328  }
1329  property->setPropertyIvarDecl(Ivar);
1330 
1331  QualType IvarType = Context.getCanonicalType(Ivar->getType());
1332 
1333  // Check that type of property and its ivar are type compatible.
1334  if (!Context.hasSameType(PropertyIvarType, IvarType)) {
1335  if (isa<ObjCObjectPointerType>(PropertyIvarType)
1336  && isa<ObjCObjectPointerType>(IvarType))
1337  compat =
1339  PropertyIvarType->getAs<ObjCObjectPointerType>(),
1340  IvarType->getAs<ObjCObjectPointerType>());
1341  else {
1342  compat = (CheckAssignmentConstraints(PropertyIvarLoc, PropertyIvarType,
1343  IvarType)
1344  == Compatible);
1345  }
1346  if (!compat) {
1347  Diag(PropertyDiagLoc, diag::err_property_ivar_type)
1348  << property->getDeclName() << PropType
1349  << Ivar->getDeclName() << IvarType;
1350  Diag(Ivar->getLocation(), diag::note_ivar_decl);
1351  // Note! I deliberately want it to fall thru so, we have a
1352  // a property implementation and to avoid future warnings.
1353  }
1354  else {
1355  // FIXME! Rules for properties are somewhat different that those
1356  // for assignments. Use a new routine to consolidate all cases;
1357  // specifically for property redeclarations as well as for ivars.
1358  QualType lhsType =Context.getCanonicalType(PropertyIvarType).getUnqualifiedType();
1359  QualType rhsType =Context.getCanonicalType(IvarType).getUnqualifiedType();
1360  if (lhsType != rhsType &&
1361  lhsType->isArithmeticType()) {
1362  Diag(PropertyDiagLoc, diag::err_property_ivar_type)
1363  << property->getDeclName() << PropType
1364  << Ivar->getDeclName() << IvarType;
1365  Diag(Ivar->getLocation(), diag::note_ivar_decl);
1366  // Fall thru - see previous comment
1367  }
1368  }
1369  // __weak is explicit. So it works on Canonical type.
1370  if ((PropType.isObjCGCWeak() && !IvarType.isObjCGCWeak() &&
1371  getLangOpts().getGC() != LangOptions::NonGC)) {
1372  Diag(PropertyDiagLoc, diag::err_weak_property)
1373  << property->getDeclName() << Ivar->getDeclName();
1374  Diag(Ivar->getLocation(), diag::note_ivar_decl);
1375  // Fall thru - see previous comment
1376  }
1377  // Fall thru - see previous comment
1378  if ((property->getType()->isObjCObjectPointerType() ||
1379  PropType.isObjCGCStrong()) && IvarType.isObjCGCWeak() &&
1380  getLangOpts().getGC() != LangOptions::NonGC) {
1381  Diag(PropertyDiagLoc, diag::err_strong_property)
1382  << property->getDeclName() << Ivar->getDeclName();
1383  // Fall thru - see previous comment
1384  }
1385  }
1386  if (getLangOpts().ObjCAutoRefCount || isARCWeak ||
1387  Ivar->getType().getObjCLifetime())
1388  checkARCPropertyImpl(*this, PropertyLoc, property, Ivar);
1389  } else if (PropertyIvar)
1390  // @dynamic
1391  Diag(PropertyDiagLoc, diag::err_dynamic_property_ivar_decl);
1392 
1393  assert (property && "ActOnPropertyImplDecl - property declaration missing");
1394  ObjCPropertyImplDecl *PIDecl =
1395  ObjCPropertyImplDecl::Create(Context, CurContext, AtLoc, PropertyLoc,
1396  property,
1397  (Synthesize ?
1400  Ivar, PropertyIvarLoc);
1401 
1402  if (CompleteTypeErr || !compat)
1403  PIDecl->setInvalidDecl();
1404 
1405  if (ObjCMethodDecl *getterMethod = property->getGetterMethodDecl()) {
1406  getterMethod->createImplicitParams(Context, IDecl);
1407  if (getLangOpts().CPlusPlus && Synthesize && !CompleteTypeErr &&
1408  Ivar->getType()->isRecordType()) {
1409  // For Objective-C++, need to synthesize the AST for the IVAR object to be
1410  // returned by the getter as it must conform to C++'s copy-return rules.
1411  // FIXME. Eventually we want to do this for Objective-C as well.
1412  SynthesizedFunctionScope Scope(*this, getterMethod);
1413  ImplicitParamDecl *SelfDecl = getterMethod->getSelfDecl();
1414  DeclRefExpr *SelfExpr = new (Context)
1415  DeclRefExpr(Context, SelfDecl, false, SelfDecl->getType(), VK_LValue,
1416  PropertyDiagLoc);
1417  MarkDeclRefReferenced(SelfExpr);
1418  Expr *LoadSelfExpr =
1420  CK_LValueToRValue, SelfExpr, nullptr,
1421  VK_RValue);
1422  Expr *IvarRefExpr =
1423  new (Context) ObjCIvarRefExpr(Ivar,
1424  Ivar->getUsageType(SelfDecl->getType()),
1425  PropertyDiagLoc,
1426  Ivar->getLocation(),
1427  LoadSelfExpr, true, true);
1429  InitializedEntity::InitializeResult(PropertyDiagLoc,
1430  getterMethod->getReturnType(),
1431  /*NRVO=*/false),
1432  PropertyDiagLoc, IvarRefExpr);
1433  if (!Res.isInvalid()) {
1434  Expr *ResExpr = Res.getAs<Expr>();
1435  if (ResExpr)
1436  ResExpr = MaybeCreateExprWithCleanups(ResExpr);
1437  PIDecl->setGetterCXXConstructor(ResExpr);
1438  }
1439  }
1440  if (property->hasAttr<NSReturnsNotRetainedAttr>() &&
1441  !getterMethod->hasAttr<NSReturnsNotRetainedAttr>()) {
1442  Diag(getterMethod->getLocation(),
1443  diag::warn_property_getter_owning_mismatch);
1444  Diag(property->getLocation(), diag::note_property_declare);
1445  }
1446  if (getLangOpts().ObjCAutoRefCount && Synthesize)
1447  switch (getterMethod->getMethodFamily()) {
1448  case OMF_retain:
1449  case OMF_retainCount:
1450  case OMF_release:
1451  case OMF_autorelease:
1452  Diag(getterMethod->getLocation(), diag::err_arc_illegal_method_def)
1453  << 1 << getterMethod->getSelector();
1454  break;
1455  default:
1456  break;
1457  }
1458  }
1459  if (ObjCMethodDecl *setterMethod = property->getSetterMethodDecl()) {
1460  setterMethod->createImplicitParams(Context, IDecl);
1461  if (getLangOpts().CPlusPlus && Synthesize && !CompleteTypeErr &&
1462  Ivar->getType()->isRecordType()) {
1463  // FIXME. Eventually we want to do this for Objective-C as well.
1464  SynthesizedFunctionScope Scope(*this, setterMethod);
1465  ImplicitParamDecl *SelfDecl = setterMethod->getSelfDecl();
1466  DeclRefExpr *SelfExpr = new (Context)
1467  DeclRefExpr(Context, SelfDecl, false, SelfDecl->getType(), VK_LValue,
1468  PropertyDiagLoc);
1469  MarkDeclRefReferenced(SelfExpr);
1470  Expr *LoadSelfExpr =
1472  CK_LValueToRValue, SelfExpr, nullptr,
1473  VK_RValue);
1474  Expr *lhs =
1475  new (Context) ObjCIvarRefExpr(Ivar,
1476  Ivar->getUsageType(SelfDecl->getType()),
1477  PropertyDiagLoc,
1478  Ivar->getLocation(),
1479  LoadSelfExpr, true, true);
1480  ObjCMethodDecl::param_iterator P = setterMethod->param_begin();
1481  ParmVarDecl *Param = (*P);
1482  QualType T = Param->getType().getNonReferenceType();
1483  DeclRefExpr *rhs = new (Context)
1484  DeclRefExpr(Context, Param, false, T, VK_LValue, PropertyDiagLoc);
1485  MarkDeclRefReferenced(rhs);
1486  ExprResult Res = BuildBinOp(S, PropertyDiagLoc,
1487  BO_Assign, lhs, rhs);
1488  if (property->getPropertyAttributes() &
1490  Expr *callExpr = Res.getAs<Expr>();
1491  if (const CXXOperatorCallExpr *CXXCE =
1492  dyn_cast_or_null<CXXOperatorCallExpr>(callExpr))
1493  if (const FunctionDecl *FuncDecl = CXXCE->getDirectCallee())
1494  if (!FuncDecl->isTrivial())
1495  if (property->getType()->isReferenceType()) {
1496  Diag(PropertyDiagLoc,
1497  diag::err_atomic_property_nontrivial_assign_op)
1498  << property->getType();
1499  Diag(FuncDecl->getBeginLoc(), diag::note_callee_decl)
1500  << FuncDecl;
1501  }
1502  }
1503  PIDecl->setSetterCXXAssignment(Res.getAs<Expr>());
1504  }
1505  }
1506 
1507  if (IC) {
1508  if (Synthesize)
1509  if (ObjCPropertyImplDecl *PPIDecl =
1510  IC->FindPropertyImplIvarDecl(PropertyIvar)) {
1511  Diag(PropertyLoc, diag::err_duplicate_ivar_use)
1512  << PropertyId << PPIDecl->getPropertyDecl()->getIdentifier()
1513  << PropertyIvar;
1514  Diag(PPIDecl->getLocation(), diag::note_previous_use);
1515  }
1516 
1517  if (ObjCPropertyImplDecl *PPIDecl
1518  = IC->FindPropertyImplDecl(PropertyId, QueryKind)) {
1519  Diag(PropertyLoc, diag::err_property_implemented) << PropertyId;
1520  Diag(PPIDecl->getLocation(), diag::note_previous_declaration);
1521  return nullptr;
1522  }
1523  IC->addPropertyImplementation(PIDecl);
1524  if (getLangOpts().ObjCDefaultSynthProperties &&
1526  !IDecl->isObjCRequiresPropertyDefs()) {
1527  // Diagnose if an ivar was lazily synthesdized due to a previous
1528  // use and if 1) property is @dynamic or 2) property is synthesized
1529  // but it requires an ivar of different name.
1530  ObjCInterfaceDecl *ClassDeclared=nullptr;
1531  ObjCIvarDecl *Ivar = nullptr;
1532  if (!Synthesize)
1533  Ivar = IDecl->lookupInstanceVariable(PropertyId, ClassDeclared);
1534  else {
1535  if (PropertyIvar && PropertyIvar != PropertyId)
1536  Ivar = IDecl->lookupInstanceVariable(PropertyId, ClassDeclared);
1537  }
1538  // Issue diagnostics only if Ivar belongs to current class.
1539  if (Ivar && Ivar->getSynthesize() &&
1540  declaresSameEntity(IC->getClassInterface(), ClassDeclared)) {
1541  Diag(Ivar->getLocation(), diag::err_undeclared_var_use)
1542  << PropertyId;
1543  Ivar->setInvalidDecl();
1544  }
1545  }
1546  } else {
1547  if (Synthesize)
1548  if (ObjCPropertyImplDecl *PPIDecl =
1549  CatImplClass->FindPropertyImplIvarDecl(PropertyIvar)) {
1550  Diag(PropertyDiagLoc, diag::err_duplicate_ivar_use)
1551  << PropertyId << PPIDecl->getPropertyDecl()->getIdentifier()
1552  << PropertyIvar;
1553  Diag(PPIDecl->getLocation(), diag::note_previous_use);
1554  }
1555 
1556  if (ObjCPropertyImplDecl *PPIDecl =
1557  CatImplClass->FindPropertyImplDecl(PropertyId, QueryKind)) {
1558  Diag(PropertyDiagLoc, diag::err_property_implemented) << PropertyId;
1559  Diag(PPIDecl->getLocation(), diag::note_previous_declaration);
1560  return nullptr;
1561  }
1562  CatImplClass->addPropertyImplementation(PIDecl);
1563  }
1564 
1565  return PIDecl;
1566 }
1567 
1568 //===----------------------------------------------------------------------===//
1569 // Helper methods.
1570 //===----------------------------------------------------------------------===//
1571 
1572 /// DiagnosePropertyMismatch - Compares two properties for their
1573 /// attributes and types and warns on a variety of inconsistencies.
1574 ///
1575 void
1577  ObjCPropertyDecl *SuperProperty,
1578  const IdentifierInfo *inheritedName,
1579  bool OverridingProtocolProperty) {
1581  Property->getPropertyAttributes();
1583  SuperProperty->getPropertyAttributes();
1584 
1585  // We allow readonly properties without an explicit ownership
1586  // (assign/unsafe_unretained/weak/retain/strong/copy) in super class
1587  // to be overridden by a property with any explicit ownership in the subclass.
1588  if (!OverridingProtocolProperty &&
1589  !getOwnershipRule(SAttr) && getOwnershipRule(CAttr))
1590  ;
1591  else {
1594  Diag(Property->getLocation(), diag::warn_readonly_property)
1595  << Property->getDeclName() << inheritedName;
1596  if ((CAttr & ObjCPropertyDecl::OBJC_PR_copy)
1597  != (SAttr & ObjCPropertyDecl::OBJC_PR_copy))
1598  Diag(Property->getLocation(), diag::warn_property_attribute)
1599  << Property->getDeclName() << "copy" << inheritedName;
1600  else if (!(SAttr & ObjCPropertyDecl::OBJC_PR_readonly)){
1601  unsigned CAttrRetain =
1602  (CAttr &
1604  unsigned SAttrRetain =
1605  (SAttr &
1607  bool CStrong = (CAttrRetain != 0);
1608  bool SStrong = (SAttrRetain != 0);
1609  if (CStrong != SStrong)
1610  Diag(Property->getLocation(), diag::warn_property_attribute)
1611  << Property->getDeclName() << "retain (or strong)" << inheritedName;
1612  }
1613  }
1614 
1615  // Check for nonatomic; note that nonatomic is effectively
1616  // meaningless for readonly properties, so don't diagnose if the
1617  // atomic property is 'readonly'.
1618  checkAtomicPropertyMismatch(*this, SuperProperty, Property, false);
1619  // Readonly properties from protocols can be implemented as "readwrite"
1620  // with a custom setter name.
1621  if (Property->getSetterName() != SuperProperty->getSetterName() &&
1622  !(SuperProperty->isReadOnly() &&
1623  isa<ObjCProtocolDecl>(SuperProperty->getDeclContext()))) {
1624  Diag(Property->getLocation(), diag::warn_property_attribute)
1625  << Property->getDeclName() << "setter" << inheritedName;
1626  Diag(SuperProperty->getLocation(), diag::note_property_declare);
1627  }
1628  if (Property->getGetterName() != SuperProperty->getGetterName()) {
1629  Diag(Property->getLocation(), diag::warn_property_attribute)
1630  << Property->getDeclName() << "getter" << inheritedName;
1631  Diag(SuperProperty->getLocation(), diag::note_property_declare);
1632  }
1633 
1634  QualType LHSType =
1635  Context.getCanonicalType(SuperProperty->getType());
1636  QualType RHSType =
1637  Context.getCanonicalType(Property->getType());
1638 
1639  if (!Context.propertyTypesAreCompatible(LHSType, RHSType)) {
1640  // Do cases not handled in above.
1641  // FIXME. For future support of covariant property types, revisit this.
1642  bool IncompatibleObjC = false;
1643  QualType ConvertedType;
1644  if (!isObjCPointerConversion(RHSType, LHSType,
1645  ConvertedType, IncompatibleObjC) ||
1646  IncompatibleObjC) {
1647  Diag(Property->getLocation(), diag::warn_property_types_are_incompatible)
1648  << Property->getType() << SuperProperty->getType() << inheritedName;
1649  Diag(SuperProperty->getLocation(), diag::note_property_declare);
1650  }
1651  }
1652 }
1653 
1655  ObjCMethodDecl *GetterMethod,
1656  SourceLocation Loc) {
1657  if (!GetterMethod)
1658  return false;
1659  QualType GetterType = GetterMethod->getReturnType().getNonReferenceType();
1660  QualType PropertyRValueType =
1661  property->getType().getNonReferenceType().getAtomicUnqualifiedType();
1662  bool compat = Context.hasSameType(PropertyRValueType, GetterType);
1663  if (!compat) {
1664  const ObjCObjectPointerType *propertyObjCPtr = nullptr;
1665  const ObjCObjectPointerType *getterObjCPtr = nullptr;
1666  if ((propertyObjCPtr =
1667  PropertyRValueType->getAs<ObjCObjectPointerType>()) &&
1668  (getterObjCPtr = GetterType->getAs<ObjCObjectPointerType>()))
1669  compat = Context.canAssignObjCInterfaces(getterObjCPtr, propertyObjCPtr);
1670  else if (CheckAssignmentConstraints(Loc, GetterType, PropertyRValueType)
1671  != Compatible) {
1672  Diag(Loc, diag::err_property_accessor_type)
1673  << property->getDeclName() << PropertyRValueType
1674  << GetterMethod->getSelector() << GetterType;
1675  Diag(GetterMethod->getLocation(), diag::note_declared_at);
1676  return true;
1677  } else {
1678  compat = true;
1679  QualType lhsType = Context.getCanonicalType(PropertyRValueType);
1680  QualType rhsType =Context.getCanonicalType(GetterType).getUnqualifiedType();
1681  if (lhsType != rhsType && lhsType->isArithmeticType())
1682  compat = false;
1683  }
1684  }
1685 
1686  if (!compat) {
1687  Diag(Loc, diag::warn_accessor_property_type_mismatch)
1688  << property->getDeclName()
1689  << GetterMethod->getSelector();
1690  Diag(GetterMethod->getLocation(), diag::note_declared_at);
1691  return true;
1692  }
1693 
1694  return false;
1695 }
1696 
1697 /// CollectImmediateProperties - This routine collects all properties in
1698 /// the class and its conforming protocols; but not those in its super class.
1699 static void
1702  ObjCContainerDecl::PropertyMap &SuperPropMap,
1703  bool CollectClassPropsOnly = false,
1704  bool IncludeProtocols = true) {
1705  if (ObjCInterfaceDecl *IDecl = dyn_cast<ObjCInterfaceDecl>(CDecl)) {
1706  for (auto *Prop : IDecl->properties()) {
1707  if (CollectClassPropsOnly && !Prop->isClassProperty())
1708  continue;
1709  PropMap[std::make_pair(Prop->getIdentifier(), Prop->isClassProperty())] =
1710  Prop;
1711  }
1712 
1713  // Collect the properties from visible extensions.
1714  for (auto *Ext : IDecl->visible_extensions())
1715  CollectImmediateProperties(Ext, PropMap, SuperPropMap,
1716  CollectClassPropsOnly, IncludeProtocols);
1717 
1718  if (IncludeProtocols) {
1719  // Scan through class's protocols.
1720  for (auto *PI : IDecl->all_referenced_protocols())
1721  CollectImmediateProperties(PI, PropMap, SuperPropMap,
1722  CollectClassPropsOnly);
1723  }
1724  }
1725  if (ObjCCategoryDecl *CATDecl = dyn_cast<ObjCCategoryDecl>(CDecl)) {
1726  for (auto *Prop : CATDecl->properties()) {
1727  if (CollectClassPropsOnly && !Prop->isClassProperty())
1728  continue;
1729  PropMap[std::make_pair(Prop->getIdentifier(), Prop->isClassProperty())] =
1730  Prop;
1731  }
1732  if (IncludeProtocols) {
1733  // Scan through class's protocols.
1734  for (auto *PI : CATDecl->protocols())
1735  CollectImmediateProperties(PI, PropMap, SuperPropMap,
1736  CollectClassPropsOnly);
1737  }
1738  }
1739  else if (ObjCProtocolDecl *PDecl = dyn_cast<ObjCProtocolDecl>(CDecl)) {
1740  for (auto *Prop : PDecl->properties()) {
1741  if (CollectClassPropsOnly && !Prop->isClassProperty())
1742  continue;
1743  ObjCPropertyDecl *PropertyFromSuper =
1744  SuperPropMap[std::make_pair(Prop->getIdentifier(),
1745  Prop->isClassProperty())];
1746  // Exclude property for protocols which conform to class's super-class,
1747  // as super-class has to implement the property.
1748  if (!PropertyFromSuper ||
1749  PropertyFromSuper->getIdentifier() != Prop->getIdentifier()) {
1750  ObjCPropertyDecl *&PropEntry =
1751  PropMap[std::make_pair(Prop->getIdentifier(),
1752  Prop->isClassProperty())];
1753  if (!PropEntry)
1754  PropEntry = Prop;
1755  }
1756  }
1757  // Scan through protocol's protocols.
1758  for (auto *PI : PDecl->protocols())
1759  CollectImmediateProperties(PI, PropMap, SuperPropMap,
1760  CollectClassPropsOnly);
1761  }
1762 }
1763 
1764 /// CollectSuperClassPropertyImplementations - This routine collects list of
1765 /// properties to be implemented in super class(s) and also coming from their
1766 /// conforming protocols.
1768  ObjCInterfaceDecl::PropertyMap &PropMap) {
1769  if (ObjCInterfaceDecl *SDecl = CDecl->getSuperClass()) {
1771  while (SDecl) {
1772  SDecl->collectPropertiesToImplement(PropMap, PO);
1773  SDecl = SDecl->getSuperClass();
1774  }
1775  }
1776 }
1777 
1778 /// IvarBacksCurrentMethodAccessor - This routine returns 'true' if 'IV' is
1779 /// an ivar synthesized for 'Method' and 'Method' is a property accessor
1780 /// declared in class 'IFace'.
1781 bool
1783  ObjCMethodDecl *Method, ObjCIvarDecl *IV) {
1784  if (!IV->getSynthesize())
1785  return false;
1786  ObjCMethodDecl *IMD = IFace->lookupMethod(Method->getSelector(),
1787  Method->isInstanceMethod());
1788  if (!IMD || !IMD->isPropertyAccessor())
1789  return false;
1790 
1791  // look up a property declaration whose one of its accessors is implemented
1792  // by this method.
1793  for (const auto *Property : IFace->instance_properties()) {
1794  if ((Property->getGetterName() == IMD->getSelector() ||
1795  Property->getSetterName() == IMD->getSelector()) &&
1796  (Property->getPropertyIvarDecl() == IV))
1797  return true;
1798  }
1799  // Also look up property declaration in class extension whose one of its
1800  // accessors is implemented by this method.
1801  for (const auto *Ext : IFace->known_extensions())
1802  for (const auto *Property : Ext->instance_properties())
1803  if ((Property->getGetterName() == IMD->getSelector() ||
1804  Property->getSetterName() == IMD->getSelector()) &&
1805  (Property->getPropertyIvarDecl() == IV))
1806  return true;
1807  return false;
1808 }
1809 
1811  ObjCPropertyDecl *Prop) {
1812  bool SuperClassImplementsGetter = false;
1813  bool SuperClassImplementsSetter = false;
1815  SuperClassImplementsSetter = true;
1816 
1817  while (IDecl->getSuperClass()) {
1818  ObjCInterfaceDecl *SDecl = IDecl->getSuperClass();
1819  if (!SuperClassImplementsGetter && SDecl->getInstanceMethod(Prop->getGetterName()))
1820  SuperClassImplementsGetter = true;
1821 
1822  if (!SuperClassImplementsSetter && SDecl->getInstanceMethod(Prop->getSetterName()))
1823  SuperClassImplementsSetter = true;
1824  if (SuperClassImplementsGetter && SuperClassImplementsSetter)
1825  return true;
1826  IDecl = IDecl->getSuperClass();
1827  }
1828  return false;
1829 }
1830 
1831 /// Default synthesizes all properties which must be synthesized
1832 /// in class's \@implementation.
1834  ObjCInterfaceDecl *IDecl,
1835  SourceLocation AtEnd) {
1838  IDecl->collectPropertiesToImplement(PropMap, PropertyOrder);
1839  if (PropMap.empty())
1840  return;
1841  ObjCInterfaceDecl::PropertyMap SuperPropMap;
1842  CollectSuperClassPropertyImplementations(IDecl, SuperPropMap);
1843 
1844  for (unsigned i = 0, e = PropertyOrder.size(); i != e; i++) {
1845  ObjCPropertyDecl *Prop = PropertyOrder[i];
1846  // Is there a matching property synthesize/dynamic?
1847  if (Prop->isInvalidDecl() ||
1848  Prop->isClassProperty() ||
1850  continue;
1851  // Property may have been synthesized by user.
1852  if (IMPDecl->FindPropertyImplDecl(
1853  Prop->getIdentifier(), Prop->getQueryKind()))
1854  continue;
1855  if (IMPDecl->getInstanceMethod(Prop->getGetterName())) {
1857  continue;
1858  if (IMPDecl->getInstanceMethod(Prop->getSetterName()))
1859  continue;
1860  }
1861  if (ObjCPropertyImplDecl *PID =
1862  IMPDecl->FindPropertyImplIvarDecl(Prop->getIdentifier())) {
1863  Diag(Prop->getLocation(), diag::warn_no_autosynthesis_shared_ivar_property)
1864  << Prop->getIdentifier();
1865  if (PID->getLocation().isValid())
1866  Diag(PID->getLocation(), diag::note_property_synthesize);
1867  continue;
1868  }
1869  ObjCPropertyDecl *PropInSuperClass =
1870  SuperPropMap[std::make_pair(Prop->getIdentifier(),
1871  Prop->isClassProperty())];
1872  if (ObjCProtocolDecl *Proto =
1873  dyn_cast<ObjCProtocolDecl>(Prop->getDeclContext())) {
1874  // We won't auto-synthesize properties declared in protocols.
1875  // Suppress the warning if class's superclass implements property's
1876  // getter and implements property's setter (if readwrite property).
1877  // Or, if property is going to be implemented in its super class.
1878  if (!SuperClassImplementsProperty(IDecl, Prop) && !PropInSuperClass) {
1879  Diag(IMPDecl->getLocation(),
1880  diag::warn_auto_synthesizing_protocol_property)
1881  << Prop << Proto;
1882  Diag(Prop->getLocation(), diag::note_property_declare);
1883  std::string FixIt =
1884  (Twine("@synthesize ") + Prop->getName() + ";\n\n").str();
1885  Diag(AtEnd, diag::note_add_synthesize_directive)
1886  << FixItHint::CreateInsertion(AtEnd, FixIt);
1887  }
1888  continue;
1889  }
1890  // If property to be implemented in the super class, ignore.
1891  if (PropInSuperClass) {
1893  (PropInSuperClass->getPropertyAttributes() &
1895  !IMPDecl->getInstanceMethod(Prop->getSetterName()) &&
1896  !IDecl->HasUserDeclaredSetterMethod(Prop)) {
1897  Diag(Prop->getLocation(), diag::warn_no_autosynthesis_property)
1898  << Prop->getIdentifier();
1899  Diag(PropInSuperClass->getLocation(), diag::note_property_declare);
1900  }
1901  else {
1902  Diag(Prop->getLocation(), diag::warn_autosynthesis_property_in_superclass)
1903  << Prop->getIdentifier();
1904  Diag(PropInSuperClass->getLocation(), diag::note_property_declare);
1905  Diag(IMPDecl->getLocation(), diag::note_while_in_implementation);
1906  }
1907  continue;
1908  }
1909  // We use invalid SourceLocations for the synthesized ivars since they
1910  // aren't really synthesized at a particular location; they just exist.
1911  // Saying that they are located at the @implementation isn't really going
1912  // to help users.
1913  ObjCPropertyImplDecl *PIDecl = dyn_cast_or_null<ObjCPropertyImplDecl>(
1915  true,
1916  /* property = */ Prop->getIdentifier(),
1917  /* ivar = */ Prop->getDefaultSynthIvarName(Context),
1918  Prop->getLocation(), Prop->getQueryKind()));
1919  if (PIDecl && !Prop->isUnavailable()) {
1920  Diag(Prop->getLocation(), diag::warn_missing_explicit_synthesis);
1921  Diag(IMPDecl->getLocation(), diag::note_while_in_implementation);
1922  }
1923  }
1924 }
1925 
1927  SourceLocation AtEnd) {
1928  if (!LangOpts.ObjCDefaultSynthProperties || LangOpts.ObjCRuntime.isFragile())
1929  return;
1930  ObjCImplementationDecl *IC=dyn_cast_or_null<ObjCImplementationDecl>(D);
1931  if (!IC)
1932  return;
1933  if (ObjCInterfaceDecl* IDecl = IC->getClassInterface())
1934  if (!IDecl->isObjCRequiresPropertyDefs())
1935  DefaultSynthesizeProperties(S, IC, IDecl, AtEnd);
1936 }
1937 
1939  Sema &S, ObjCInterfaceDecl *PrimaryClass, Selector Method,
1940  ObjCImplDecl *IMPDecl, ObjCContainerDecl *CDecl, ObjCCategoryDecl *C,
1941  ObjCPropertyDecl *Prop,
1942  llvm::SmallPtrSet<const ObjCMethodDecl *, 8> &SMap) {
1943  // Check to see if we have a corresponding selector in SMap and with the
1944  // right method type.
1945  auto I = llvm::find_if(SMap, [&](const ObjCMethodDecl *x) {
1946  return x->getSelector() == Method &&
1947  x->isClassMethod() == Prop->isClassProperty();
1948  });
1949  // When reporting on missing property setter/getter implementation in
1950  // categories, do not report when they are declared in primary class,
1951  // class's protocol, or one of it super classes. This is because,
1952  // the class is going to implement them.
1953  if (I == SMap.end() &&
1954  (PrimaryClass == nullptr ||
1955  !PrimaryClass->lookupPropertyAccessor(Method, C,
1956  Prop->isClassProperty()))) {
1957  unsigned diag =
1958  isa<ObjCCategoryDecl>(CDecl)
1959  ? (Prop->isClassProperty()
1960  ? diag::warn_impl_required_in_category_for_class_property
1961  : diag::warn_setter_getter_impl_required_in_category)
1962  : (Prop->isClassProperty()
1963  ? diag::warn_impl_required_for_class_property
1964  : diag::warn_setter_getter_impl_required);
1965  S.Diag(IMPDecl->getLocation(), diag) << Prop->getDeclName() << Method;
1966  S.Diag(Prop->getLocation(), diag::note_property_declare);
1967  if (S.LangOpts.ObjCDefaultSynthProperties &&
1969  if (ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(CDecl))
1970  if (const ObjCInterfaceDecl *RID = ID->isObjCRequiresPropertyDefs())
1971  S.Diag(RID->getLocation(), diag::note_suppressed_class_declare);
1972  }
1973 }
1974 
1976  ObjCContainerDecl *CDecl,
1977  bool SynthesizeProperties) {
1979  ObjCInterfaceDecl *IDecl = dyn_cast<ObjCInterfaceDecl>(CDecl);
1980 
1981  // Since we don't synthesize class properties, we should emit diagnose even
1982  // if SynthesizeProperties is true.
1983  ObjCContainerDecl::PropertyMap NoNeedToImplPropMap;
1984  // Gather properties which need not be implemented in this class
1985  // or category.
1986  if (!IDecl)
1987  if (ObjCCategoryDecl *C = dyn_cast<ObjCCategoryDecl>(CDecl)) {
1988  // For categories, no need to implement properties declared in
1989  // its primary class (and its super classes) if property is
1990  // declared in one of those containers.
1991  if ((IDecl = C->getClassInterface())) {
1993  IDecl->collectPropertiesToImplement(NoNeedToImplPropMap, PO);
1994  }
1995  }
1996  if (IDecl)
1997  CollectSuperClassPropertyImplementations(IDecl, NoNeedToImplPropMap);
1998 
1999  // When SynthesizeProperties is true, we only check class properties.
2000  CollectImmediateProperties(CDecl, PropMap, NoNeedToImplPropMap,
2001  SynthesizeProperties/*CollectClassPropsOnly*/);
2002 
2003  // Scan the @interface to see if any of the protocols it adopts
2004  // require an explicit implementation, via attribute
2005  // 'objc_protocol_requires_explicit_implementation'.
2006  if (IDecl) {
2007  std::unique_ptr<ObjCContainerDecl::PropertyMap> LazyMap;
2008 
2009  for (auto *PDecl : IDecl->all_referenced_protocols()) {
2010  if (!PDecl->hasAttr<ObjCExplicitProtocolImplAttr>())
2011  continue;
2012  // Lazily construct a set of all the properties in the @interface
2013  // of the class, without looking at the superclass. We cannot
2014  // use the call to CollectImmediateProperties() above as that
2015  // utilizes information from the super class's properties as well
2016  // as scans the adopted protocols. This work only triggers for protocols
2017  // with the attribute, which is very rare, and only occurs when
2018  // analyzing the @implementation.
2019  if (!LazyMap) {
2020  ObjCContainerDecl::PropertyMap NoNeedToImplPropMap;
2021  LazyMap.reset(new ObjCContainerDecl::PropertyMap());
2022  CollectImmediateProperties(CDecl, *LazyMap, NoNeedToImplPropMap,
2023  /* CollectClassPropsOnly */ false,
2024  /* IncludeProtocols */ false);
2025  }
2026  // Add the properties of 'PDecl' to the list of properties that
2027  // need to be implemented.
2028  for (auto *PropDecl : PDecl->properties()) {
2029  if ((*LazyMap)[std::make_pair(PropDecl->getIdentifier(),
2030  PropDecl->isClassProperty())])
2031  continue;
2032  PropMap[std::make_pair(PropDecl->getIdentifier(),
2033  PropDecl->isClassProperty())] = PropDecl;
2034  }
2035  }
2036  }
2037 
2038  if (PropMap.empty())
2039  return;
2040 
2042  for (const auto *I : IMPDecl->property_impls())
2043  PropImplMap.insert(I->getPropertyDecl());
2044 
2045  llvm::SmallPtrSet<const ObjCMethodDecl *, 8> InsMap;
2046  // Collect property accessors implemented in current implementation.
2047  for (const auto *I : IMPDecl->methods())
2048  InsMap.insert(I);
2049 
2050  ObjCCategoryDecl *C = dyn_cast<ObjCCategoryDecl>(CDecl);
2051  ObjCInterfaceDecl *PrimaryClass = nullptr;
2052  if (C && !C->IsClassExtension())
2053  if ((PrimaryClass = C->getClassInterface()))
2054  // Report unimplemented properties in the category as well.
2055  if (ObjCImplDecl *IMP = PrimaryClass->getImplementation()) {
2056  // When reporting on missing setter/getters, do not report when
2057  // setter/getter is implemented in category's primary class
2058  // implementation.
2059  for (const auto *I : IMP->methods())
2060  InsMap.insert(I);
2061  }
2062 
2063  for (ObjCContainerDecl::PropertyMap::iterator
2064  P = PropMap.begin(), E = PropMap.end(); P != E; ++P) {
2065  ObjCPropertyDecl *Prop = P->second;
2066  // Is there a matching property synthesize/dynamic?
2067  if (Prop->isInvalidDecl() ||
2069  PropImplMap.count(Prop) ||
2070  Prop->getAvailability() == AR_Unavailable)
2071  continue;
2072 
2073  // Diagnose unimplemented getters and setters.
2075  PrimaryClass, Prop->getGetterName(), IMPDecl, CDecl, C, Prop, InsMap);
2076  if (!Prop->isReadOnly())
2078  PrimaryClass, Prop->getSetterName(),
2079  IMPDecl, CDecl, C, Prop, InsMap);
2080  }
2081 }
2082 
2084  for (const auto *propertyImpl : impDecl->property_impls()) {
2085  const auto *property = propertyImpl->getPropertyDecl();
2086 
2087  // Warn about null_resettable properties with synthesized setters,
2088  // because the setter won't properly handle nil.
2089  if (propertyImpl->getPropertyImplementation()
2091  (property->getPropertyAttributes() &
2093  property->getGetterMethodDecl() &&
2094  property->getSetterMethodDecl()) {
2095  auto *getterMethod = property->getGetterMethodDecl();
2096  auto *setterMethod = property->getSetterMethodDecl();
2097  if (!impDecl->getInstanceMethod(setterMethod->getSelector()) &&
2098  !impDecl->getInstanceMethod(getterMethod->getSelector())) {
2099  SourceLocation loc = propertyImpl->getLocation();
2100  if (loc.isInvalid())
2101  loc = impDecl->getBeginLoc();
2102 
2103  Diag(loc, diag::warn_null_resettable_setter)
2104  << setterMethod->getSelector() << property->getDeclName();
2105  }
2106  }
2107  }
2108 }
2109 
2110 void
2112  ObjCInterfaceDecl* IDecl) {
2113  // Rules apply in non-GC mode only
2114  if (getLangOpts().getGC() != LangOptions::NonGC)
2115  return;
2117  for (auto *Prop : IDecl->properties())
2118  PM[std::make_pair(Prop->getIdentifier(), Prop->isClassProperty())] = Prop;
2119  for (const auto *Ext : IDecl->known_extensions())
2120  for (auto *Prop : Ext->properties())
2121  PM[std::make_pair(Prop->getIdentifier(), Prop->isClassProperty())] = Prop;
2122 
2123  for (ObjCContainerDecl::PropertyMap::iterator I = PM.begin(), E = PM.end();
2124  I != E; ++I) {
2125  const ObjCPropertyDecl *Property = I->second;
2126  ObjCMethodDecl *GetterMethod = nullptr;
2127  ObjCMethodDecl *SetterMethod = nullptr;
2128  bool LookedUpGetterSetter = false;
2129 
2130  unsigned Attributes = Property->getPropertyAttributes();
2131  unsigned AttributesAsWritten = Property->getPropertyAttributesAsWritten();
2132 
2133  if (!(AttributesAsWritten & ObjCPropertyDecl::OBJC_PR_atomic) &&
2134  !(AttributesAsWritten & ObjCPropertyDecl::OBJC_PR_nonatomic)) {
2135  GetterMethod = Property->isClassProperty() ?
2136  IMPDecl->getClassMethod(Property->getGetterName()) :
2137  IMPDecl->getInstanceMethod(Property->getGetterName());
2138  SetterMethod = Property->isClassProperty() ?
2139  IMPDecl->getClassMethod(Property->getSetterName()) :
2140  IMPDecl->getInstanceMethod(Property->getSetterName());
2141  LookedUpGetterSetter = true;
2142  if (GetterMethod) {
2143  Diag(GetterMethod->getLocation(),
2144  diag::warn_default_atomic_custom_getter_setter)
2145  << Property->getIdentifier() << 0;
2146  Diag(Property->getLocation(), diag::note_property_declare);
2147  }
2148  if (SetterMethod) {
2149  Diag(SetterMethod->getLocation(),
2150  diag::warn_default_atomic_custom_getter_setter)
2151  << Property->getIdentifier() << 1;
2152  Diag(Property->getLocation(), diag::note_property_declare);
2153  }
2154  }
2155 
2156  // We only care about readwrite atomic property.
2157  if ((Attributes & ObjCPropertyDecl::OBJC_PR_nonatomic) ||
2158  !(Attributes & ObjCPropertyDecl::OBJC_PR_readwrite))
2159  continue;
2160  if (const ObjCPropertyImplDecl *PIDecl = IMPDecl->FindPropertyImplDecl(
2161  Property->getIdentifier(), Property->getQueryKind())) {
2162  if (PIDecl->getPropertyImplementation() == ObjCPropertyImplDecl::Dynamic)
2163  continue;
2164  if (!LookedUpGetterSetter) {
2165  GetterMethod = Property->isClassProperty() ?
2166  IMPDecl->getClassMethod(Property->getGetterName()) :
2167  IMPDecl->getInstanceMethod(Property->getGetterName());
2168  SetterMethod = Property->isClassProperty() ?
2169  IMPDecl->getClassMethod(Property->getSetterName()) :
2170  IMPDecl->getInstanceMethod(Property->getSetterName());
2171  }
2172  if ((GetterMethod && !SetterMethod) || (!GetterMethod && SetterMethod)) {
2173  SourceLocation MethodLoc =
2174  (GetterMethod ? GetterMethod->getLocation()
2175  : SetterMethod->getLocation());
2176  Diag(MethodLoc, diag::warn_atomic_property_rule)
2177  << Property->getIdentifier() << (GetterMethod != nullptr)
2178  << (SetterMethod != nullptr);
2179  // fixit stuff.
2180  if (Property->getLParenLoc().isValid() &&
2181  !(AttributesAsWritten & ObjCPropertyDecl::OBJC_PR_atomic)) {
2182  // @property () ... case.
2183  SourceLocation AfterLParen =
2184  getLocForEndOfToken(Property->getLParenLoc());
2185  StringRef NonatomicStr = AttributesAsWritten? "nonatomic, "
2186  : "nonatomic";
2187  Diag(Property->getLocation(),
2188  diag::note_atomic_property_fixup_suggest)
2189  << FixItHint::CreateInsertion(AfterLParen, NonatomicStr);
2190  } else if (Property->getLParenLoc().isInvalid()) {
2191  //@property id etc.
2192  SourceLocation startLoc =
2193  Property->getTypeSourceInfo()->getTypeLoc().getBeginLoc();
2194  Diag(Property->getLocation(),
2195  diag::note_atomic_property_fixup_suggest)
2196  << FixItHint::CreateInsertion(startLoc, "(nonatomic) ");
2197  }
2198  else
2199  Diag(MethodLoc, diag::note_atomic_property_fixup_suggest);
2200  Diag(Property->getLocation(), diag::note_property_declare);
2201  }
2202  }
2203  }
2204 }
2205 
2207  if (getLangOpts().getGC() == LangOptions::GCOnly)
2208  return;
2209 
2210  for (const auto *PID : D->property_impls()) {
2211  const ObjCPropertyDecl *PD = PID->getPropertyDecl();
2212  if (PD && !PD->hasAttr<NSReturnsNotRetainedAttr>() &&
2213  !PD->isClassProperty() &&
2214  !D->getInstanceMethod(PD->getGetterName())) {
2215  ObjCMethodDecl *method = PD->getGetterMethodDecl();
2216  if (!method)
2217  continue;
2218  ObjCMethodFamily family = method->getMethodFamily();
2219  if (family == OMF_alloc || family == OMF_copy ||
2220  family == OMF_mutableCopy || family == OMF_new) {
2221  if (getLangOpts().ObjCAutoRefCount)
2222  Diag(PD->getLocation(), diag::err_cocoa_naming_owned_rule);
2223  else
2224  Diag(PD->getLocation(), diag::warn_cocoa_naming_owned_rule);
2225 
2226  // Look for a getter explicitly declared alongside the property.
2227  // If we find one, use its location for the note.
2228  SourceLocation noteLoc = PD->getLocation();
2229  SourceLocation fixItLoc;
2230  for (auto *getterRedecl : method->redecls()) {
2231  if (getterRedecl->isImplicit())
2232  continue;
2233  if (getterRedecl->getDeclContext() != PD->getDeclContext())
2234  continue;
2235  noteLoc = getterRedecl->getLocation();
2236  fixItLoc = getterRedecl->getEndLoc();
2237  }
2238 
2240  TokenValue tokens[] = {
2241  tok::kw___attribute, tok::l_paren, tok::l_paren,
2242  PP.getIdentifierInfo("objc_method_family"), tok::l_paren,
2243  PP.getIdentifierInfo("none"), tok::r_paren,
2244  tok::r_paren, tok::r_paren
2245  };
2246  StringRef spelling = "__attribute__((objc_method_family(none)))";
2247  StringRef macroName = PP.getLastMacroWithSpelling(noteLoc, tokens);
2248  if (!macroName.empty())
2249  spelling = macroName;
2250 
2251  auto noteDiag = Diag(noteLoc, diag::note_cocoa_naming_declare_family)
2252  << method->getDeclName() << spelling;
2253  if (fixItLoc.isValid()) {
2254  SmallString<64> fixItText(" ");
2255  fixItText += spelling;
2256  noteDiag << FixItHint::CreateInsertion(fixItLoc, fixItText);
2257  }
2258  }
2259  }
2260  }
2261 }
2262 
2264  const ObjCImplementationDecl *ImplD,
2265  const ObjCInterfaceDecl *IFD) {
2266  assert(IFD->hasDesignatedInitializers());
2267  const ObjCInterfaceDecl *SuperD = IFD->getSuperClass();
2268  if (!SuperD)
2269  return;
2270 
2271  SelectorSet InitSelSet;
2272  for (const auto *I : ImplD->instance_methods())
2273  if (I->getMethodFamily() == OMF_init)
2274  InitSelSet.insert(I->getSelector());
2275 
2277  SuperD->getDesignatedInitializers(DesignatedInits);
2279  I = DesignatedInits.begin(), E = DesignatedInits.end(); I != E; ++I) {
2280  const ObjCMethodDecl *MD = *I;
2281  if (!InitSelSet.count(MD->getSelector())) {
2282  // Don't emit a diagnostic if the overriding method in the subclass is
2283  // marked as unavailable.
2284  bool Ignore = false;
2285  if (auto *IMD = IFD->getInstanceMethod(MD->getSelector())) {
2286  Ignore = IMD->isUnavailable();
2287  } else {
2288  // Check the methods declared in the class extensions too.
2289  for (auto *Ext : IFD->visible_extensions())
2290  if (auto *IMD = Ext->getInstanceMethod(MD->getSelector())) {
2291  Ignore = IMD->isUnavailable();
2292  break;
2293  }
2294  }
2295  if (!Ignore) {
2296  Diag(ImplD->getLocation(),
2297  diag::warn_objc_implementation_missing_designated_init_override)
2298  << MD->getSelector();
2299  Diag(MD->getLocation(), diag::note_objc_designated_init_marked_here);
2300  }
2301  }
2302  }
2303 }
2304 
2305 /// AddPropertyAttrs - Propagates attributes from a property to the
2306 /// implicitly-declared getter or setter for that property.
2307 static void AddPropertyAttrs(Sema &S, ObjCMethodDecl *PropertyMethod,
2309  // Should we just clone all attributes over?
2310  for (const auto *A : Property->attrs()) {
2311  if (isa<DeprecatedAttr>(A) ||
2312  isa<UnavailableAttr>(A) ||
2313  isa<AvailabilityAttr>(A))
2314  PropertyMethod->addAttr(A->clone(S.Context));
2315  }
2316 }
2317 
2318 /// ProcessPropertyDecl - Make sure that any user-defined setter/getter methods
2319 /// have the property type and issue diagnostics if they don't.
2320 /// Also synthesize a getter/setter method if none exist (and update the
2321 /// appropriate lookup tables.
2323  ObjCMethodDecl *GetterMethod, *SetterMethod;
2324  ObjCContainerDecl *CD = cast<ObjCContainerDecl>(property->getDeclContext());
2325  if (CD->isInvalidDecl())
2326  return;
2327 
2328  bool IsClassProperty = property->isClassProperty();
2329  GetterMethod = IsClassProperty ?
2330  CD->getClassMethod(property->getGetterName()) :
2331  CD->getInstanceMethod(property->getGetterName());
2332 
2333  // if setter or getter is not found in class extension, it might be
2334  // in the primary class.
2335  if (!GetterMethod)
2336  if (const ObjCCategoryDecl *CatDecl = dyn_cast<ObjCCategoryDecl>(CD))
2337  if (CatDecl->IsClassExtension())
2338  GetterMethod = IsClassProperty ? CatDecl->getClassInterface()->
2339  getClassMethod(property->getGetterName()) :
2340  CatDecl->getClassInterface()->
2341  getInstanceMethod(property->getGetterName());
2342 
2343  SetterMethod = IsClassProperty ?
2344  CD->getClassMethod(property->getSetterName()) :
2345  CD->getInstanceMethod(property->getSetterName());
2346  if (!SetterMethod)
2347  if (const ObjCCategoryDecl *CatDecl = dyn_cast<ObjCCategoryDecl>(CD))
2348  if (CatDecl->IsClassExtension())
2349  SetterMethod = IsClassProperty ? CatDecl->getClassInterface()->
2350  getClassMethod(property->getSetterName()) :
2351  CatDecl->getClassInterface()->
2352  getInstanceMethod(property->getSetterName());
2353  DiagnosePropertyAccessorMismatch(property, GetterMethod,
2354  property->getLocation());
2355 
2356  if (!property->isReadOnly() && SetterMethod) {
2357  if (Context.getCanonicalType(SetterMethod->getReturnType()) !=
2358  Context.VoidTy)
2359  Diag(SetterMethod->getLocation(), diag::err_setter_type_void);
2360  if (SetterMethod->param_size() != 1 ||
2362  (*SetterMethod->param_begin())->getType().getNonReferenceType(),
2363  property->getType().getNonReferenceType())) {
2364  Diag(property->getLocation(),
2365  diag::warn_accessor_property_type_mismatch)
2366  << property->getDeclName()
2367  << SetterMethod->getSelector();
2368  Diag(SetterMethod->getLocation(), diag::note_declared_at);
2369  }
2370  }
2371 
2372  // Synthesize getter/setter methods if none exist.
2373  // Find the default getter and if one not found, add one.
2374  // FIXME: The synthesized property we set here is misleading. We almost always
2375  // synthesize these methods unless the user explicitly provided prototypes
2376  // (which is odd, but allowed). Sema should be typechecking that the
2377  // declarations jive in that situation (which it is not currently).
2378  if (!GetterMethod) {
2379  // No instance/class method of same name as property getter name was found.
2380  // Declare a getter method and add it to the list of methods
2381  // for this class.
2382  SourceLocation Loc = property->getLocation();
2383 
2384  // The getter returns the declared property type with all qualifiers
2385  // removed.
2386  QualType resultTy = property->getType().getAtomicUnqualifiedType();
2387 
2388  // If the property is null_resettable, the getter returns nonnull.
2389  if (property->getPropertyAttributes() &
2391  QualType modifiedTy = resultTy;
2392  if (auto nullability = AttributedType::stripOuterNullability(modifiedTy)) {
2393  if (*nullability == NullabilityKind::Unspecified)
2394  resultTy = Context.getAttributedType(attr::TypeNonNull,
2395  modifiedTy, modifiedTy);
2396  }
2397  }
2398 
2399  GetterMethod = ObjCMethodDecl::Create(Context, Loc, Loc,
2400  property->getGetterName(),
2401  resultTy, nullptr, CD,
2402  !IsClassProperty, /*isVariadic=*/false,
2403  /*isPropertyAccessor=*/true,
2404  /*isImplicitlyDeclared=*/true, /*isDefined=*/false,
2405  (property->getPropertyImplementation() ==
2409  CD->addDecl(GetterMethod);
2410 
2411  AddPropertyAttrs(*this, GetterMethod, property);
2412 
2413  if (property->hasAttr<NSReturnsNotRetainedAttr>())
2414  GetterMethod->addAttr(NSReturnsNotRetainedAttr::CreateImplicit(Context,
2415  Loc));
2416 
2417  if (property->hasAttr<ObjCReturnsInnerPointerAttr>())
2418  GetterMethod->addAttr(
2419  ObjCReturnsInnerPointerAttr::CreateImplicit(Context, Loc));
2420 
2421  if (const SectionAttr *SA = property->getAttr<SectionAttr>())
2422  GetterMethod->addAttr(
2423  SectionAttr::CreateImplicit(Context, SectionAttr::GNU_section,
2424  SA->getName(), Loc));
2425 
2426  if (getLangOpts().ObjCAutoRefCount)
2427  CheckARCMethodDecl(GetterMethod);
2428  } else
2429  // A user declared getter will be synthesize when @synthesize of
2430  // the property with the same name is seen in the @implementation
2431  GetterMethod->setPropertyAccessor(true);
2432  property->setGetterMethodDecl(GetterMethod);
2433 
2434  // Skip setter if property is read-only.
2435  if (!property->isReadOnly()) {
2436  // Find the default setter and if one not found, add one.
2437  if (!SetterMethod) {
2438  // No instance/class method of same name as property setter name was
2439  // found.
2440  // Declare a setter method and add it to the list of methods
2441  // for this class.
2442  SourceLocation Loc = property->getLocation();
2443 
2444  SetterMethod =
2445  ObjCMethodDecl::Create(Context, Loc, Loc,
2446  property->getSetterName(), Context.VoidTy,
2447  nullptr, CD, !IsClassProperty,
2448  /*isVariadic=*/false,
2449  /*isPropertyAccessor=*/true,
2450  /*isImplicitlyDeclared=*/true,
2451  /*isDefined=*/false,
2452  (property->getPropertyImplementation() ==
2456 
2457  // Remove all qualifiers from the setter's parameter type.
2458  QualType paramTy =
2459  property->getType().getUnqualifiedType().getAtomicUnqualifiedType();
2460 
2461  // If the property is null_resettable, the setter accepts a
2462  // nullable value.
2463  if (property->getPropertyAttributes() &
2465  QualType modifiedTy = paramTy;
2466  if (auto nullability = AttributedType::stripOuterNullability(modifiedTy)){
2467  if (*nullability == NullabilityKind::Unspecified)
2468  paramTy = Context.getAttributedType(attr::TypeNullable,
2469  modifiedTy, modifiedTy);
2470  }
2471  }
2472 
2473  // Invent the arguments for the setter. We don't bother making a
2474  // nice name for the argument.
2475  ParmVarDecl *Argument = ParmVarDecl::Create(Context, SetterMethod,
2476  Loc, Loc,
2477  property->getIdentifier(),
2478  paramTy,
2479  /*TInfo=*/nullptr,
2480  SC_None,
2481  nullptr);
2482  SetterMethod->setMethodParams(Context, Argument, None);
2483 
2484  AddPropertyAttrs(*this, SetterMethod, property);
2485 
2486  CD->addDecl(SetterMethod);
2487  if (const SectionAttr *SA = property->getAttr<SectionAttr>())
2488  SetterMethod->addAttr(
2489  SectionAttr::CreateImplicit(Context, SectionAttr::GNU_section,
2490  SA->getName(), Loc));
2491  // It's possible for the user to have set a very odd custom
2492  // setter selector that causes it to have a method family.
2493  if (getLangOpts().ObjCAutoRefCount)
2494  CheckARCMethodDecl(SetterMethod);
2495  } else
2496  // A user declared setter will be synthesize when @synthesize of
2497  // the property with the same name is seen in the @implementation
2498  SetterMethod->setPropertyAccessor(true);
2499  property->setSetterMethodDecl(SetterMethod);
2500  }
2501  // Add any synthesized methods to the global pool. This allows us to
2502  // handle the following, which is supported by GCC (and part of the design).
2503  //
2504  // @interface Foo
2505  // @property double bar;
2506  // @end
2507  //
2508  // void thisIsUnfortunate() {
2509  // id foo;
2510  // double bar = [foo bar];
2511  // }
2512  //
2513  if (!IsClassProperty) {
2514  if (GetterMethod)
2515  AddInstanceMethodToGlobalPool(GetterMethod);
2516  if (SetterMethod)
2517  AddInstanceMethodToGlobalPool(SetterMethod);
2518  } else {
2519  if (GetterMethod)
2520  AddFactoryMethodToGlobalPool(GetterMethod);
2521  if (SetterMethod)
2522  AddFactoryMethodToGlobalPool(SetterMethod);
2523  }
2524 
2525  ObjCInterfaceDecl *CurrentClass = dyn_cast<ObjCInterfaceDecl>(CD);
2526  if (!CurrentClass) {
2527  if (ObjCCategoryDecl *Cat = dyn_cast<ObjCCategoryDecl>(CD))
2528  CurrentClass = Cat->getClassInterface();
2529  else if (ObjCImplDecl *Impl = dyn_cast<ObjCImplDecl>(CD))
2530  CurrentClass = Impl->getClassInterface();
2531  }
2532  if (GetterMethod)
2533  CheckObjCMethodOverrides(GetterMethod, CurrentClass, Sema::RTC_Unknown);
2534  if (SetterMethod)
2535  CheckObjCMethodOverrides(SetterMethod, CurrentClass, Sema::RTC_Unknown);
2536 }
2537 
2539  SourceLocation Loc,
2540  unsigned &Attributes,
2541  bool propertyInPrimaryClass) {
2542  // FIXME: Improve the reported location.
2543  if (!PDecl || PDecl->isInvalidDecl())
2544  return;
2545 
2546  if ((Attributes & ObjCDeclSpec::DQ_PR_readonly) &&
2547  (Attributes & ObjCDeclSpec::DQ_PR_readwrite))
2548  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2549  << "readonly" << "readwrite";
2550 
2551  ObjCPropertyDecl *PropertyDecl = cast<ObjCPropertyDecl>(PDecl);
2552  QualType PropertyTy = PropertyDecl->getType();
2553 
2554  // Check for copy or retain on non-object types.
2555  if ((Attributes & (ObjCDeclSpec::DQ_PR_weak | ObjCDeclSpec::DQ_PR_copy |
2557  !PropertyTy->isObjCRetainableType() &&
2558  !PropertyDecl->hasAttr<ObjCNSObjectAttr>()) {
2559  Diag(Loc, diag::err_objc_property_requires_object)
2560  << (Attributes & ObjCDeclSpec::DQ_PR_weak ? "weak" :
2561  Attributes & ObjCDeclSpec::DQ_PR_copy ? "copy" : "retain (or strong)");
2564  PropertyDecl->setInvalidDecl();
2565  }
2566 
2567  // Check for assign on object types.
2568  if ((Attributes & ObjCDeclSpec::DQ_PR_assign) &&
2569  !(Attributes & ObjCDeclSpec::DQ_PR_unsafe_unretained) &&
2570  PropertyTy->isObjCRetainableType() &&
2571  !PropertyTy->isObjCARCImplicitlyUnretainedType()) {
2572  Diag(Loc, diag::warn_objc_property_assign_on_object);
2573  }
2574 
2575  // Check for more than one of { assign, copy, retain }.
2576  if (Attributes & ObjCDeclSpec::DQ_PR_assign) {
2577  if (Attributes & ObjCDeclSpec::DQ_PR_copy) {
2578  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2579  << "assign" << "copy";
2580  Attributes &= ~ObjCDeclSpec::DQ_PR_copy;
2581  }
2582  if (Attributes & ObjCDeclSpec::DQ_PR_retain) {
2583  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2584  << "assign" << "retain";
2585  Attributes &= ~ObjCDeclSpec::DQ_PR_retain;
2586  }
2587  if (Attributes & ObjCDeclSpec::DQ_PR_strong) {
2588  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2589  << "assign" << "strong";
2590  Attributes &= ~ObjCDeclSpec::DQ_PR_strong;
2591  }
2592  if (getLangOpts().ObjCAutoRefCount &&
2593  (Attributes & ObjCDeclSpec::DQ_PR_weak)) {
2594  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2595  << "assign" << "weak";
2596  Attributes &= ~ObjCDeclSpec::DQ_PR_weak;
2597  }
2598  if (PropertyDecl->hasAttr<IBOutletCollectionAttr>())
2599  Diag(Loc, diag::warn_iboutletcollection_property_assign);
2600  } else if (Attributes & ObjCDeclSpec::DQ_PR_unsafe_unretained) {
2601  if (Attributes & ObjCDeclSpec::DQ_PR_copy) {
2602  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2603  << "unsafe_unretained" << "copy";
2604  Attributes &= ~ObjCDeclSpec::DQ_PR_copy;
2605  }
2606  if (Attributes & ObjCDeclSpec::DQ_PR_retain) {
2607  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2608  << "unsafe_unretained" << "retain";
2609  Attributes &= ~ObjCDeclSpec::DQ_PR_retain;
2610  }
2611  if (Attributes & ObjCDeclSpec::DQ_PR_strong) {
2612  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2613  << "unsafe_unretained" << "strong";
2614  Attributes &= ~ObjCDeclSpec::DQ_PR_strong;
2615  }
2616  if (getLangOpts().ObjCAutoRefCount &&
2617  (Attributes & ObjCDeclSpec::DQ_PR_weak)) {
2618  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2619  << "unsafe_unretained" << "weak";
2620  Attributes &= ~ObjCDeclSpec::DQ_PR_weak;
2621  }
2622  } else if (Attributes & ObjCDeclSpec::DQ_PR_copy) {
2623  if (Attributes & ObjCDeclSpec::DQ_PR_retain) {
2624  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2625  << "copy" << "retain";
2626  Attributes &= ~ObjCDeclSpec::DQ_PR_retain;
2627  }
2628  if (Attributes & ObjCDeclSpec::DQ_PR_strong) {
2629  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2630  << "copy" << "strong";
2631  Attributes &= ~ObjCDeclSpec::DQ_PR_strong;
2632  }
2633  if (Attributes & ObjCDeclSpec::DQ_PR_weak) {
2634  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2635  << "copy" << "weak";
2636  Attributes &= ~ObjCDeclSpec::DQ_PR_weak;
2637  }
2638  }
2639  else if ((Attributes & ObjCDeclSpec::DQ_PR_retain) &&
2640  (Attributes & ObjCDeclSpec::DQ_PR_weak)) {
2641  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2642  << "retain" << "weak";
2643  Attributes &= ~ObjCDeclSpec::DQ_PR_retain;
2644  }
2645  else if ((Attributes & ObjCDeclSpec::DQ_PR_strong) &&
2646  (Attributes & ObjCDeclSpec::DQ_PR_weak)) {
2647  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2648  << "strong" << "weak";
2649  Attributes &= ~ObjCDeclSpec::DQ_PR_weak;
2650  }
2651 
2652  if (Attributes & ObjCDeclSpec::DQ_PR_weak) {
2653  // 'weak' and 'nonnull' are mutually exclusive.
2654  if (auto nullability = PropertyTy->getNullability(Context)) {
2655  if (*nullability == NullabilityKind::NonNull)
2656  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2657  << "nonnull" << "weak";
2658  }
2659  }
2660 
2661  if ((Attributes & ObjCDeclSpec::DQ_PR_atomic) &&
2662  (Attributes & ObjCDeclSpec::DQ_PR_nonatomic)) {
2663  Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
2664  << "atomic" << "nonatomic";
2665  Attributes &= ~ObjCDeclSpec::DQ_PR_atomic;
2666  }
2667 
2668  // Warn if user supplied no assignment attribute, property is
2669  // readwrite, and this is an object type.
2670  if (!getOwnershipRule(Attributes) && PropertyTy->isObjCRetainableType()) {
2671  if (Attributes & ObjCDeclSpec::DQ_PR_readonly) {
2672  // do nothing
2673  } else if (getLangOpts().ObjCAutoRefCount) {
2674  // With arc, @property definitions should default to strong when
2675  // not specified.
2677  } else if (PropertyTy->isObjCObjectPointerType()) {
2678  bool isAnyClassTy =
2679  (PropertyTy->isObjCClassType() ||
2680  PropertyTy->isObjCQualifiedClassType());
2681  // In non-gc, non-arc mode, 'Class' is treated as a 'void *' no need to
2682  // issue any warning.
2683  if (isAnyClassTy && getLangOpts().getGC() == LangOptions::NonGC)
2684  ;
2685  else if (propertyInPrimaryClass) {
2686  // Don't issue warning on property with no life time in class
2687  // extension as it is inherited from property in primary class.
2688  // Skip this warning in gc-only mode.
2689  if (getLangOpts().getGC() != LangOptions::GCOnly)
2690  Diag(Loc, diag::warn_objc_property_no_assignment_attribute);
2691 
2692  // If non-gc code warn that this is likely inappropriate.
2693  if (getLangOpts().getGC() == LangOptions::NonGC)
2694  Diag(Loc, diag::warn_objc_property_default_assign_on_object);
2695  }
2696  }
2697 
2698  // FIXME: Implement warning dependent on NSCopying being
2699  // implemented. See also:
2700  // <rdar://5168496&4855821&5607453&5096644&4947311&5698469&4947014&5168496>
2701  // (please trim this list while you are at it).
2702  }
2703 
2704  if (!(Attributes & ObjCDeclSpec::DQ_PR_copy)
2705  &&!(Attributes & ObjCDeclSpec::DQ_PR_readonly)
2706  && getLangOpts().getGC() == LangOptions::GCOnly
2707  && PropertyTy->isBlockPointerType())
2708  Diag(Loc, diag::warn_objc_property_copy_missing_on_block);
2709  else if ((Attributes & ObjCDeclSpec::DQ_PR_retain) &&
2710  !(Attributes & ObjCDeclSpec::DQ_PR_readonly) &&
2711  !(Attributes & ObjCDeclSpec::DQ_PR_strong) &&
2712  PropertyTy->isBlockPointerType())
2713  Diag(Loc, diag::warn_objc_property_retain_of_block);
2714 
2715  if ((Attributes & ObjCDeclSpec::DQ_PR_readonly) &&
2716  (Attributes & ObjCDeclSpec::DQ_PR_setter))
2717  Diag(Loc, diag::warn_objc_readonly_property_has_setter);
2718 }
A call to an overloaded operator written using operator syntax.
Definition: ExprCXX.h:77
SourceLocation getLocForStartOfFile(FileID FID) const
Return the source location corresponding to the first byte of the specified file. ...
ObjCPropertyQueryKind getQueryKind() const
Definition: DeclObjC.h:880
const internal::VariadicDynCastAllOfMatcher< Stmt, CallExpr > callExpr
Matches call expressions.
bool isClassMethod() const
Definition: DeclObjC.h:429
bool RequireNonAbstractType(SourceLocation Loc, QualType T, TypeDiagnoser &Diagnoser)
Represents a function declaration or definition.
Definition: Decl.h:1737
Lexer - This provides a simple interface that turns a text buffer into a stream of tokens...
Definition: Lexer.h:76
SourceLocation getLocWithOffset(int Offset) const
Return a source location with the specified offset from this SourceLocation.
protocol_range protocols() const
Definition: DeclObjC.h:1365
Smart pointer class that efficiently represents Objective-C method names.
A (possibly-)qualified type.
Definition: Type.h:639
ObjCInterfaceDecl * getClassInterface()
Definition: DeclObjC.h:2324
all_protocol_range all_referenced_protocols() const
Definition: DeclObjC.h:1423
ObjCInterfaceDecl * getClassInterface()
Definition: DeclObjC.cpp:1143
bool IvarBacksCurrentMethodAccessor(ObjCInterfaceDecl *IFace, ObjCMethodDecl *Method, ObjCIvarDecl *IV)
IvarBacksCurrentMethodAccessor - This routine returns &#39;true&#39; if &#39;IV&#39; is an ivar synthesized for &#39;Meth...
IdentifierInfo * getIdentifierInfo(StringRef Name) const
Return information about the specified preprocessor identifier token.
bool isObjCPointerConversion(QualType FromType, QualType ToType, QualType &ConvertedType, bool &IncompatibleObjC)
isObjCPointerConversion - Determines whether this is an Objective-C pointer conversion.
bool isArithmeticType() const
Definition: Type.cpp:1974
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:12353
void setObjCLifetime(ObjCLifetime type)
Definition: Type.h:330
static void CollectSuperClassPropertyImplementations(ObjCInterfaceDecl *CDecl, ObjCInterfaceDecl::PropertyMap &PropMap)
CollectSuperClassPropertyImplementations - This routine collects list of properties to be implemented...
bool isRecordType() const
Definition: Type.h:6381
llvm::SmallVector< ObjCPropertyDecl *, 8 > PropertyDeclOrder
Definition: DeclObjC.h:1106
QualType getQualifiedType(SplitQualType split) const
Un-split a SplitQualType.
Definition: ASTContext.h:1932
SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID)
Emit a diagnostic.
Definition: Sema.h:1363
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:87
void DiagnoseMissingDesignatedInitOverrides(const ObjCImplementationDecl *ImplD, const ObjCInterfaceDecl *IFD)
void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, SourceLocation Loc, unsigned &Attributes, bool propertyInPrimaryClass)
Ensure attributes are consistent with type.
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: DeclBase.h:413
Captures information about "declaration specifiers" specific to Objective-C.
Definition: DeclSpec.h:788
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:6257
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:2218
void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false)
AddFactoryMethodToGlobalPool - Same as above, but for factory methods.
Definition: Sema.h:3728
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:47
void setPropertyImplementation(PropertyControl pc)
Definition: DeclObjC.h:928
A container of type source information.
Definition: Decl.h:86
void ProcessPropertyDecl(ObjCPropertyDecl *property)
Process the specified property declaration and create decls for the setters and getters as needed...
void setPropertyAccessor(bool isAccessor)
Definition: DeclObjC.h:435
SourceLocation getEndLoc() const
Get the end source location.
Definition: TypeLoc.cpp:226
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:812
const T * getAs() const
Member-template getAs<specific type>&#39;.
Definition: Type.h:6768
static unsigned getOwnershipRule(unsigned attr)
ObjCMethodDecl - Represents an instance or class method declaration.
Definition: DeclObjC.h:138
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:1702
bool isInvalidDecl() const
Definition: DeclBase.h:545
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:176
protocol_range protocols() const
Definition: DeclObjC.h:2128
Represents a parameter to a function.
Definition: Decl.h:1549
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:137
IdentifierInfo * getIdentifier() const
Get the identifier that names this declaration, if there is one.
Definition: Decl.h:269
static void CollectImmediateProperties(ObjCContainerDecl *CDecl, ObjCContainerDecl::PropertyMap &PropMap, ObjCContainerDecl::PropertyMap &SuperPropMap, bool CollectClassPropsOnly=false, bool IncludeProtocols=true)
CollectImmediateProperties - This routine collects all properties in the class and its conforming pro...
DeclarationName getDeclName() const
Get the actual, stored name of the declaration, which may be a special name.
Definition: Decl.h:297
instprop_range instance_properties() const
Definition: DeclObjC.h:1002
One of these records is kept for each identifier that is lexed.
SourceLocation getSetterNameLoc() const
Definition: DeclSpec.h:882
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:154
The results of name lookup within a DeclContext.
Definition: DeclBase.h:1190
ObjCMethodDecl * getClassMethod(Selector Sel, bool AllowHidden=false) const
Definition: DeclObjC.h:1091
ObjCMethodFamily
A family of Objective-C methods.
instmeth_range instance_methods() const
Definition: DeclObjC.h:1053
method_range methods() const
Definition: DeclObjC.h:1036
Token - This structure provides full information about a lexed token.
Definition: Token.h:34
prop_range properties() const
Definition: DeclObjC.h:987
int Category
Definition: Format.cpp:1710
IdentifierTable & Idents
Definition: ASTContext.h:565
This little struct is used to capture information about structure field declarators, which is basically just a bitfield size.
Definition: DeclSpec.h:2489
An r-value expression (a pr-value in the C++11 taxonomy) produces a temporary value.
Definition: Specifiers.h:109
bool isClassProperty() const
Definition: DeclObjC.h:878
ObjCMethodFamily getMethodFamily() const
Determines the family of this method.
Definition: DeclObjC.cpp:985
void collectPropertiesToImplement(PropertyMap &PM, PropertyDeclOrder &PO) const override
This routine collects list of properties to be implemented in the class.
Definition: DeclObjC.cpp:392
void setObjCWeakProperty(bool Val=true)
Definition: DeclSpec.h:2438
bool isNonFragile() const
Does this runtime follow the set of implied behaviors for a "non-fragile" ABI?
Definition: ObjCRuntime.h:81
ObjCContainerDecl - Represents a container for method declarations.
Definition: DeclObjC.h:968
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:2246
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:7902
Whether values of this type can be null is (explicitly) unspecified.
PropertyAttributeKind getPropertyAttributes() const
Definition: DeclObjC.h:839
const ObjCInterfaceDecl * isObjCRequiresPropertyDefs() const
isObjCRequiresPropertyDefs - Checks that a class or one of its super classes must not be auto-synthes...
Definition: DeclObjC.cpp:422
void MarkDeclRefReferenced(DeclRefExpr *E, const Expr *Base=nullptr)
Perform reference-marking and odr-use handling for a DeclRefExpr.
Definition: SemaExpr.cpp:15879
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:862
Values of this type can never be null.
ObjCProtocolDecl * getDefinition()
Retrieve the definition of this protocol, if any.
Definition: DeclObjC.h:2209
Scope - A scope is a transient data structure that is used while parsing the program.
Definition: Scope.h:40
bool declaresSameEntity(const Decl *D1, const Decl *D2)
Determine whether two declarations declare the same entity.
Definition: DeclBase.h:1161
Represents an Objective-C protocol declaration.
Definition: DeclObjC.h:2063
Preprocessor & PP
Definition: Sema.h:373
const LangOptions & getLangOpts() const
Definition: Sema.h:1286
PropertyControl getPropertyImplementation() const
Definition: DeclObjC.h:932
Represents an ObjC class declaration.
Definition: DeclObjC.h:1171
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:322
IdentifierInfo * getIdentifier() const
Definition: DeclSpec.h:2126
const LangOptions & LangOpts
Definition: Sema.h:372
This object can be modified without requiring retains or releases.
Definition: Type.h:158
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:2852
void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false)
AddInstanceMethodToGlobalPool - All instance methods in a translation unit are added to a global pool...
Definition: Sema.h:3723
lookup_result lookup(DeclarationName Name) const
lookup - Find the declarations (if any) with the given Name in this context.
Definition: DeclBase.cpp:1613
void CheckObjCMethodOverrides(ObjCMethodDecl *ObjCMethod, ObjCInterfaceDecl *CurrentClass, ResultTypeCompatibilityKind RTC)
ObjCPropertyImplDecl - Represents implementation declaration of a property in a class or category imp...
Definition: DeclObjC.h:2758
bool hasAttr() const
Definition: DeclBase.h:534
return Out str()
Sema - This implements semantic analysis and AST building for C.
Definition: Sema.h:328
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:96
visible_extensions_range visible_extensions() const
Definition: DeclObjC.h:1722
AvailabilityResult getAvailability(std::string *Message=nullptr, VersionTuple EnclosingVersion=VersionTuple(), StringRef *RealizedPlatform=nullptr) const
Determine the availability of the given declaration.
Definition: DeclBase.cpp:588
llvm::SmallPtrSet< Selector, 8 > SelectorSet
Definition: Sema.h:3541
static ImplicitCastExpr * Create(const ASTContext &Context, QualType T, CastKind Kind, Expr *Operand, const CXXCastPath *BasePath, ExprValueKind Cat)
Definition: Expr.cpp:1847
void addObjCLifetime(ObjCLifetime type)
Definition: Type.h:334
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:1813
TypeSourceInfo * getTrivialTypeSourceInfo(QualType T, SourceLocation Loc=SourceLocation()) const
Allocate a TypeSourceInfo where all locations have been initialized to a given location, which defaults to the empty location.
SourceLocation getBeginLoc() const
Get the begin source location.
Definition: TypeLoc.cpp:189
bool isObjCGCStrong() const
true when Type is objc&#39;s strong.
Definition: Type.h:1054
This represents one expression.
Definition: Expr.h:108
known_extensions_range known_extensions() const
Definition: DeclObjC.h:1760
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:809
Selector getSetterName() const
Definition: DeclObjC.h:913
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:123
IdentifierInfo * getDefaultSynthIvarName(ASTContext &Ctx) const
Get the default name of the synthesized ivar.
Definition: DeclObjC.cpp:224
bool isObjCARCImplicitlyUnretainedType() const
Determines if this type, which must satisfy isObjCLifetimeType(), is implicitly __unsafe_unretained r...
Definition: Type.cpp:3962
TypeSourceInfo * getTypeSourceInfo() const
Definition: DeclObjC.h:826
bool isObjCRetainableType() const
Definition: Type.cpp:4000
static ObjCPropertyDecl::PropertyAttributeKind makePropertyAttributesAsWritten(unsigned Attributes)
void setInvalidDecl(bool Invalid=true)
setInvalidDecl - Indicates the Decl had a semantic error.
Definition: DeclBase.cpp:131
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:430
ObjCInterfaceDecl * getSuperClass() const
Definition: DeclObjC.cpp:337
void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD)
Stores token information for comparing actual tokens with predefined values.
Definition: Preprocessor.h:84
ObjCPropertyDecl * FindPropertyVisibleInPrimaryClass(IdentifierInfo *PropertyId, ObjCPropertyQueryKind QueryKind) const
FindPropertyVisibleInPrimaryClass - Finds declaration of the property with name &#39;PropertyId&#39; in the p...
Definition: DeclObjC.cpp:368
bool RequireCompleteType(SourceLocation Loc, QualType T, TypeDiagnoser &Diagnoser)
Ensure that the type T is a complete type.
Definition: SemaType.cpp:7680
ParmVarDecl *const * param_iterator
Definition: DeclObjC.h:343
A std::pair-like structure for storing a qualified type split into its local qualifiers and its local...
Definition: Type.h:578
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:3912
ObjCIvarDecl * lookupInstanceVariable(IdentifierInfo *IVarName, ObjCInterfaceDecl *&ClassDeclared)
Definition: DeclObjC.cpp:620
clang::ObjCRuntime ObjCRuntime
Definition: LangOptions.h:206
propimpl_range property_impls() const
Definition: DeclObjC.h:2466
Qualifiers Quals
The local qualifiers.
Definition: Type.h:583
llvm::SmallDenseSet< const ObjCProtocolDecl *, 8 > ProtocolPropertySet
Definition: DeclObjC.h:1105
bool isInvalid() const
Definition: Ownership.h:166
bool isInstanceMethod() const
Definition: DeclObjC.h:421
Preprocessor & getPreprocessor() const
Definition: Sema.h:1292
Selector getSelector() const
Definition: DeclObjC.h:320
QualType getType() const
Definition: DeclObjC.h:828
const SourceManager & SM
Definition: Format.cpp:1568
static StringRef getIdentifier(const Token &Tok)
ObjCKeywordKind
Provides a namespace for Objective-C keywords which start with an &#39;@&#39;.
Definition: TokenKinds.h:40
QualType getObjCGCQualType(QualType T, Qualifiers::GC gcAttr) const
Return the uniqued reference to the type for an Objective-C gc-qualified type.
QualType getAttributedType(attr::Kind attrKind, QualType modifiedType, QualType equivalentType)
SplitQualType split() const
Divides a QualType into its unqualified type and a set of local qualifiers.
Definition: Type.h:6092
RecordDecl * getDecl() const
Definition: Type.h:4392
There is no lifetime qualification on this type.
Definition: Type.h:154
void makeDeclVisibleInContext(NamedDecl *D)
Makes a declaration visible within this context.
Definition: DeclBase.cpp:1803
Assigning into this object requires the old value to be released and the new value to be retained...
Definition: Type.h:165
Kind
ActionResult - This structure is used while parsing/acting on expressions, stmts, etc...
Definition: Ownership.h:153
Encodes a location in the source.
bool getSynthesize() const
Definition: DeclObjC.h:1990
IdentifierInfo & get(StringRef Name)
Return the identifier token info for the specified named identifier.
ObjCPropertyQueryKind
Definition: DeclObjC.h:716
void setPropertyAttributesAsWritten(PropertyAttributeKind PRVal)
Definition: DeclObjC.h:855
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:842
ObjCCategoryDecl - Represents a category declaration.
Definition: DeclObjC.h:2279
CanQualType VoidTy
Definition: ASTContext.h:1015
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:728
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:1868
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:2097
Indicates that the nullability of the type was spelled with a property attribute rather than a type q...
Definition: DeclObjC.h:748
Assigning into this object requires a lifetime extension.
Definition: Type.h:171
bool hasFlexibleArrayMember() const
Definition: Decl.h:3646
bool hasSameUnqualifiedType(QualType T1, QualType T2) const
Determine whether the given types are equivalent after cvr-qualifiers have been removed.
Definition: ASTContext.h:2306
void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D)
void setSetterCXXAssignment(Expr *setterCXXAssignment)
Definition: DeclObjC.h:2860
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:1049
bool propertyTypesAreCompatible(QualType, QualType)
ExprResult PerformCopyInitialization(const InitializedEntity &Entity, SourceLocation EqualLoc, ExprResult Init, bool TopLevelOfInitList=false, bool AllowExplicit=false)
Definition: SemaInit.cpp:9183
const ObjCInterfaceDecl * getClassInterface() const
Definition: DeclObjC.h:2439
redecl_range redecls() const
Returns an iterator range for all the redeclarations of the same decl.
Definition: DeclBase.h:944
static ParmVarDecl * Create(ASTContext &C, DeclContext *DC, SourceLocation StartLoc, SourceLocation IdLoc, IdentifierInfo *Id, QualType T, TypeSourceInfo *TInfo, StorageClass S, Expr *DefArg)
Definition: Decl.cpp:2548
static void setImpliedPropertyAttributeForReadOnlyProperty(ObjCPropertyDecl *property, ObjCIvarDecl *ivar)
setImpliedPropertyAttributeForReadOnlyProperty - This routine evaludates life-time attributes for a &#39;...
Dataflow Directional Tag Classes.
bool isValid() const
Return true if this is a valid SourceLocation object.
ObjCPropertyDecl * FindPropertyDeclaration(const IdentifierInfo *PropertyId, ObjCPropertyQueryKind QueryKind) const
FindPropertyDeclaration - Finds declaration of the property given its name in &#39;PropertyId&#39; and return...
Definition: DeclObjC.cpp:235
void diagnoseNullResettableSynthesizedSetters(const ObjCImplDecl *impDecl)
Diagnose any null-resettable synthesized setters.
void setGetterName(Selector Sel, SourceLocation Loc=SourceLocation())
Definition: DeclObjC.h:908
DeclContext - This is used only as base class of specific decl types that can act as declaration cont...
Definition: DeclBase.h:1266
static bool SuperClassImplementsProperty(ObjCInterfaceDecl *IDecl, ObjCPropertyDecl *Prop)
PropertyAttributeKind getPropertyAttributesAsWritten() const
Definition: DeclObjC.h:851
The basic abstraction for the target Objective-C runtime.
Definition: ObjCRuntime.h:27
attr_range attrs() const
Definition: DeclBase.h:493
bool CheckARCMethodDecl(ObjCMethodDecl *method)
Check a method declaration for compatibility with the Objective-C ARC conventions.
llvm::DenseMap< std::pair< IdentifierInfo *, unsigned >, ObjCPropertyDecl * > PropertyMap
Definition: DeclObjC.h:1104
bool hasObjCLifetime() const
Definition: Type.h:326
bool hasDesignatedInitializers() const
Returns true if this interface decl contains at least one initializer marked with the &#39;objc_designate...
Definition: DeclObjC.cpp:1521
bool isMacroID() const
Represents a pointer to an Objective C object.
Definition: Type.h:5806
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:1747
ObjCImplementationDecl - Represents a class definition - this is where method definitions are specifi...
Definition: DeclObjC.h:2551
A helper class that allows the use of isa/cast/dyncast to detect TagType objects of structs/unions/cl...
Definition: Type.h:4382
void overwritePropertyAttributes(unsigned PRVal)
Definition: DeclObjC.h:847
T * getAttr() const
Definition: DeclBase.h:530
SourceLocation getGetterNameLoc() const
Definition: DeclSpec.h:874
bool hasSameType(QualType T1, QualType T2) const
Determine whether the given types T1 and T2 are equivalent.
Definition: ASTContext.h:2282
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:91
void addDecl(Decl *D)
Add the declaration D into this context.
Definition: DeclBase.cpp:1525
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:682
void setSetterName(Selector Sel, SourceLocation Loc=SourceLocation())
Definition: DeclObjC.h:916
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:546
SourceManager & getSourceManager()
Definition: ASTContext.h:661
bool isObjCObjectType() const
Definition: Type.h:6409
bool IsClassExtension() const
Definition: DeclObjC.h:2389
SourceLocation getIdentifierLoc() const
Definition: DeclSpec.h:2132
CanQualType getCanonicalType(QualType T) const
Return the canonical (structural) type corresponding to the specified potentially non-canonical type ...
Definition: ASTContext.h:2266
TypeLoc getTypeLoc() const
Return the TypeLoc wrapper for the type source info.
Definition: TypeLoc.h:237
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:168
Expr * MaybeCreateExprWithCleanups(Expr *SubExpr)
MaybeCreateExprWithCleanups - If the current full-expression requires any cleanups, surround it with a ExprWithCleanups node.
Compatible - the types are compatible according to the standard.
Definition: Sema.h:9691
ObjCPropertyImplDecl * FindPropertyImplDecl(IdentifierInfo *propertyId, ObjCPropertyQueryKind queryKind) const
FindPropertyImplDecl - This method looks up a previous ObjCPropertyImplDecl added to the list of thos...
Definition: DeclObjC.cpp:2109
ObjCIvarDecl - Represents an ObjC instance variable.
Definition: DeclObjC.h:1944
static unsigned deducePropertyOwnershipFromType(Sema &S, QualType T)
DeclContext * CurContext
CurContext - This is the current declaration context of parsing.
Definition: Sema.h:386
unsigned kind
All of the diagnostics that can be emitted by the frontend.
Definition: DiagnosticIDs.h:60
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:128
void addAttr(Attr *A)
Definition: DeclBase.cpp:843
void setPropertyAttributes(PropertyAttributeKind PRVal)
Definition: DeclObjC.h:843
void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, ObjCPropertyDecl *SuperProperty, const IdentifierInfo *Name, bool OverridingProtocolProperty)
DiagnosePropertyMismatch - Compares two properties for their attributes and types and warns on a vari...
StringRef getName() const
Get the name of identifier for this declaration as a StringRef.
Definition: Decl.h:275
bool isArcWeakrefUnavailable() const
isArcWeakrefUnavailable - Checks for a class or one of its super classes to be incompatible with __we...
Definition: DeclObjC.cpp:412
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:1074
void addPropertyImplementation(ObjCPropertyImplDecl *property)
Definition: DeclObjC.cpp:2072
static void CheckPropertyAgainstProtocol(Sema &S, ObjCPropertyDecl *Prop, ObjCProtocolDecl *Proto, llvm::SmallPtrSetImpl< ObjCProtocolDecl *> &Known)
Check this Objective-C property against a property declared in the given protocol.
QualType getType() const
Definition: Decl.h:647
#define true
Definition: stdbool.h:16
An l-value expression is a reference to an object with independent storage.
Definition: Specifiers.h:113
A trivial tuple used to represent a source range.
ASTContext & Context
Definition: Sema.h:374
void setLexicalDeclContext(DeclContext *DC)
Definition: DeclBase.cpp:298
ObjCMethodDecl * getGetterMethodDecl() const
Definition: DeclObjC.h:921
QualType getObjCObjectPointerType(QualType OIT) const
Return a ObjCObjectPointerType type for the given ObjCObjectType.
ObjCMethodDecl * getInstanceMethod(Selector Sel, bool AllowHidden=false) const
Definition: DeclObjC.h:1086
ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, BinaryOperatorKind Opc, Expr *LHSExpr, Expr *RHSExpr)
Definition: SemaExpr.cpp:12895
llvm::DenseMap< const Stmt *, CFGBlock * > SMap
Definition: CFGStmtMap.cpp:21
AccessControl getAccessControl() const
Definition: DeclObjC.h:1983
bool isPropertyAccessor() const
Definition: DeclObjC.h:431
Selector getGetterName() const
Definition: DeclObjC.h:905
SourceLocation getLParenLoc() const
Definition: DeclObjC.h:823
void setType(QualType newType)
Definition: Decl.h:648
const LangOptions & getLangOpts() const
Definition: ASTContext.h:706
ObjCCategoryImplDecl - An object of this class encapsulates a category @implementation declaration...
Definition: DeclObjC.h:2498
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:421
TypeSourceInfo * GetTypeForDeclarator(Declarator &D, Scope *S)
GetTypeForDeclarator - Convert the type for the specified declarator to Type instances.
Definition: SemaType.cpp:5228
QualType getType() const
Return the type wrapped by this type source info.
Definition: Decl.h:97
std::pair< FileID, unsigned > getDecomposedLoc(SourceLocation Loc) const
Decompose the specified location into a raw FileID + Offset pair.
Engages in a tight little dance with the lexer to efficiently preprocess tokens.
Definition: Preprocessor.h:123
bool isUnavailable(std::string *Message=nullptr) const
Determine whether this declaration is marked &#39;unavailable&#39;.
Definition: DeclBase.h:676
static bool isIncompatiblePropertyAttribute(unsigned Attr1, unsigned Attr2, ObjCPropertyDecl::PropertyAttributeKind Kind)
Qualifiers::ObjCLifetime getObjCLifetime() const
Returns lifetime attribute of this type.
Definition: Type.h:1059
ObjCCategoryDecl * FindCategoryDeclaration(IdentifierInfo *CategoryId) const
FindCategoryDeclaration - Finds category declaration in the list of categories for this class and ret...
Definition: DeclObjC.cpp:1663