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1 //===--- DeclObjC.cpp - ObjC Declaration AST Node Implementation ----------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file implements the Objective-C related Decl classes.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "clang/AST/DeclObjC.h"
15 #include "clang/AST/ASTContext.h"
16 #include "clang/AST/ASTMutationListener.h"
17 #include "clang/AST/Attr.h"
18 #include "clang/AST/Stmt.h"
19 #include "llvm/ADT/STLExtras.h"
20 #include "llvm/ADT/SmallString.h"
21 using namespace clang;
22 
23 //===----------------------------------------------------------------------===//
24 // ObjCListBase
25 //===----------------------------------------------------------------------===//
26 
set(void * const * InList,unsigned Elts,ASTContext & Ctx)27 void ObjCListBase::set(void *const* InList, unsigned Elts, ASTContext &Ctx) {
28   List = nullptr;
29   if (Elts == 0) return;  // Setting to an empty list is a noop.
30 
31 
32   List = new (Ctx) void*[Elts];
33   NumElts = Elts;
34   memcpy(List, InList, sizeof(void*)*Elts);
35 }
36 
set(ObjCProtocolDecl * const * InList,unsigned Elts,const SourceLocation * Locs,ASTContext & Ctx)37 void ObjCProtocolList::set(ObjCProtocolDecl* const* InList, unsigned Elts,
38                            const SourceLocation *Locs, ASTContext &Ctx) {
39   if (Elts == 0)
40     return;
41 
42   Locations = new (Ctx) SourceLocation[Elts];
43   memcpy(Locations, Locs, sizeof(SourceLocation) * Elts);
44   set(InList, Elts, Ctx);
45 }
46 
47 //===----------------------------------------------------------------------===//
48 // ObjCInterfaceDecl
49 //===----------------------------------------------------------------------===//
50 
anchor()51 void ObjCContainerDecl::anchor() { }
52 
53 /// getIvarDecl - This method looks up an ivar in this ContextDecl.
54 ///
55 ObjCIvarDecl *
getIvarDecl(IdentifierInfo * Id) const56 ObjCContainerDecl::getIvarDecl(IdentifierInfo *Id) const {
57   lookup_result R = lookup(Id);
58   for (lookup_iterator Ivar = R.begin(), IvarEnd = R.end();
59        Ivar != IvarEnd; ++Ivar) {
60     if (ObjCIvarDecl *ivar = dyn_cast<ObjCIvarDecl>(*Ivar))
61       return ivar;
62   }
63   return nullptr;
64 }
65 
66 // Get the local instance/class method declared in this interface.
67 ObjCMethodDecl *
getMethod(Selector Sel,bool isInstance,bool AllowHidden) const68 ObjCContainerDecl::getMethod(Selector Sel, bool isInstance,
69                              bool AllowHidden) const {
70   // If this context is a hidden protocol definition, don't find any
71   // methods there.
72   if (const ObjCProtocolDecl *Proto = dyn_cast<ObjCProtocolDecl>(this)) {
73     if (const ObjCProtocolDecl *Def = Proto->getDefinition())
74       if (Def->isHidden() && !AllowHidden)
75         return nullptr;
76   }
77 
78   // Since instance & class methods can have the same name, the loop below
79   // ensures we get the correct method.
80   //
81   // @interface Whatever
82   // - (int) class_method;
83   // + (float) class_method;
84   // @end
85   //
86   lookup_result R = lookup(Sel);
87   for (lookup_iterator Meth = R.begin(), MethEnd = R.end();
88        Meth != MethEnd; ++Meth) {
89     ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(*Meth);
90     if (MD && MD->isInstanceMethod() == isInstance)
91       return MD;
92   }
93   return nullptr;
94 }
95 
96 /// \brief This routine returns 'true' if a user declared setter method was
97 /// found in the class, its protocols, its super classes or categories.
98 /// It also returns 'true' if one of its categories has declared a 'readwrite'
99 /// property.  This is because, user must provide a setter method for the
100 /// category's 'readwrite' property.
HasUserDeclaredSetterMethod(const ObjCPropertyDecl * Property) const101 bool ObjCContainerDecl::HasUserDeclaredSetterMethod(
102     const ObjCPropertyDecl *Property) const {
103   Selector Sel = Property->getSetterName();
104   lookup_result R = lookup(Sel);
105   for (lookup_iterator Meth = R.begin(), MethEnd = R.end();
106        Meth != MethEnd; ++Meth) {
107     ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(*Meth);
108     if (MD && MD->isInstanceMethod() && !MD->isImplicit())
109       return true;
110   }
111 
112   if (const ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(this)) {
113     // Also look into categories, including class extensions, looking
114     // for a user declared instance method.
115     for (const auto *Cat : ID->visible_categories()) {
116       if (ObjCMethodDecl *MD = Cat->getInstanceMethod(Sel))
117         if (!MD->isImplicit())
118           return true;
119       if (Cat->IsClassExtension())
120         continue;
121       // Also search through the categories looking for a 'readwrite'
122       // declaration of this property. If one found, presumably a setter will
123       // be provided (properties declared in categories will not get
124       // auto-synthesized).
125       for (const auto *P : Cat->properties())
126         if (P->getIdentifier() == Property->getIdentifier()) {
127           if (P->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_readwrite)
128             return true;
129           break;
130         }
131     }
132 
133     // Also look into protocols, for a user declared instance method.
134     for (const auto *Proto : ID->all_referenced_protocols())
135       if (Proto->HasUserDeclaredSetterMethod(Property))
136         return true;
137 
138     // And in its super class.
139     ObjCInterfaceDecl *OSC = ID->getSuperClass();
140     while (OSC) {
141       if (OSC->HasUserDeclaredSetterMethod(Property))
142         return true;
143       OSC = OSC->getSuperClass();
144     }
145   }
146   if (const ObjCProtocolDecl *PD = dyn_cast<ObjCProtocolDecl>(this))
147     for (const auto *PI : PD->protocols())
148       if (PI->HasUserDeclaredSetterMethod(Property))
149         return true;
150   return false;
151 }
152 
153 ObjCPropertyDecl *
findPropertyDecl(const DeclContext * DC,const IdentifierInfo * propertyID,ObjCPropertyQueryKind queryKind)154 ObjCPropertyDecl::findPropertyDecl(const DeclContext *DC,
155                                    const IdentifierInfo *propertyID,
156                                    ObjCPropertyQueryKind queryKind) {
157   // If this context is a hidden protocol definition, don't find any
158   // property.
159   if (const ObjCProtocolDecl *Proto = dyn_cast<ObjCProtocolDecl>(DC)) {
160     if (const ObjCProtocolDecl *Def = Proto->getDefinition())
161       if (Def->isHidden())
162         return nullptr;
163   }
164 
165   // If context is class, then lookup property in its extensions.
166   // This comes before property is looked up in primary class.
167   if (auto *IDecl = dyn_cast<ObjCInterfaceDecl>(DC)) {
168     for (const auto *Ext : IDecl->known_extensions())
169       if (ObjCPropertyDecl *PD = ObjCPropertyDecl::findPropertyDecl(Ext,
170                                                        propertyID,
171                                                        queryKind))
172         return PD;
173   }
174 
175   DeclContext::lookup_result R = DC->lookup(propertyID);
176   ObjCPropertyDecl *classProp = nullptr;
177   for (DeclContext::lookup_iterator I = R.begin(), E = R.end(); I != E;
178        ++I)
179     if (ObjCPropertyDecl *PD = dyn_cast<ObjCPropertyDecl>(*I)) {
180       // If queryKind is unknown, we return the instance property if one
181       // exists; otherwise we return the class property.
182       if ((queryKind == ObjCPropertyQueryKind::OBJC_PR_query_unknown &&
183            !PD->isClassProperty()) ||
184           (queryKind == ObjCPropertyQueryKind::OBJC_PR_query_class &&
185            PD->isClassProperty()) ||
186           (queryKind == ObjCPropertyQueryKind::OBJC_PR_query_instance &&
187            !PD->isClassProperty()))
188         return PD;
189 
190       if (PD->isClassProperty())
191         classProp = PD;
192     }
193 
194   if (queryKind == ObjCPropertyQueryKind::OBJC_PR_query_unknown)
195     // We can't find the instance property, return the class property.
196     return classProp;
197 
198   return nullptr;
199 }
200 
201 IdentifierInfo *
getDefaultSynthIvarName(ASTContext & Ctx) const202 ObjCPropertyDecl::getDefaultSynthIvarName(ASTContext &Ctx) const {
203   SmallString<128> ivarName;
204   {
205     llvm::raw_svector_ostream os(ivarName);
206     os << '_' << getIdentifier()->getName();
207   }
208   return &Ctx.Idents.get(ivarName.str());
209 }
210 
211 /// FindPropertyDeclaration - Finds declaration of the property given its name
212 /// in 'PropertyId' and returns it. It returns 0, if not found.
FindPropertyDeclaration(const IdentifierInfo * PropertyId,ObjCPropertyQueryKind QueryKind) const213 ObjCPropertyDecl *ObjCContainerDecl::FindPropertyDeclaration(
214     const IdentifierInfo *PropertyId,
215     ObjCPropertyQueryKind QueryKind) const {
216   // Don't find properties within hidden protocol definitions.
217   if (const ObjCProtocolDecl *Proto = dyn_cast<ObjCProtocolDecl>(this)) {
218     if (const ObjCProtocolDecl *Def = Proto->getDefinition())
219       if (Def->isHidden())
220         return nullptr;
221   }
222 
223   // Search the extensions of a class first; they override what's in
224   // the class itself.
225   if (const auto *ClassDecl = dyn_cast<ObjCInterfaceDecl>(this)) {
226     for (const auto *Ext : ClassDecl->visible_extensions()) {
227       if (auto *P = Ext->FindPropertyDeclaration(PropertyId, QueryKind))
228         return P;
229     }
230   }
231 
232   if (ObjCPropertyDecl *PD =
233         ObjCPropertyDecl::findPropertyDecl(cast<DeclContext>(this), PropertyId,
234                                            QueryKind))
235     return PD;
236 
237   switch (getKind()) {
238     default:
239       break;
240     case Decl::ObjCProtocol: {
241       const ObjCProtocolDecl *PID = cast<ObjCProtocolDecl>(this);
242       for (const auto *I : PID->protocols())
243         if (ObjCPropertyDecl *P = I->FindPropertyDeclaration(PropertyId,
244                                                              QueryKind))
245           return P;
246       break;
247     }
248     case Decl::ObjCInterface: {
249       const ObjCInterfaceDecl *OID = cast<ObjCInterfaceDecl>(this);
250       // Look through categories (but not extensions; they were handled above).
251       for (const auto *Cat : OID->visible_categories()) {
252         if (!Cat->IsClassExtension())
253           if (ObjCPropertyDecl *P = Cat->FindPropertyDeclaration(
254                                              PropertyId, QueryKind))
255             return P;
256       }
257 
258       // Look through protocols.
259       for (const auto *I : OID->all_referenced_protocols())
260         if (ObjCPropertyDecl *P = I->FindPropertyDeclaration(PropertyId,
261                                                              QueryKind))
262           return P;
263 
264       // Finally, check the super class.
265       if (const ObjCInterfaceDecl *superClass = OID->getSuperClass())
266         return superClass->FindPropertyDeclaration(PropertyId, QueryKind);
267       break;
268     }
269     case Decl::ObjCCategory: {
270       const ObjCCategoryDecl *OCD = cast<ObjCCategoryDecl>(this);
271       // Look through protocols.
272       if (!OCD->IsClassExtension())
273         for (const auto *I : OCD->protocols())
274           if (ObjCPropertyDecl *P = I->FindPropertyDeclaration(PropertyId,
275                                                                QueryKind))
276             return P;
277       break;
278     }
279   }
280   return nullptr;
281 }
282 
anchor()283 void ObjCInterfaceDecl::anchor() { }
284 
getTypeParamList() const285 ObjCTypeParamList *ObjCInterfaceDecl::getTypeParamList() const {
286   // If this particular declaration has a type parameter list, return it.
287   if (ObjCTypeParamList *written = getTypeParamListAsWritten())
288     return written;
289 
290   // If there is a definition, return its type parameter list.
291   if (const ObjCInterfaceDecl *def = getDefinition())
292     return def->getTypeParamListAsWritten();
293 
294   // Otherwise, look at previous declarations to determine whether any
295   // of them has a type parameter list, skipping over those
296   // declarations that do not.
297   for (auto decl = getMostRecentDecl(); decl; decl = decl->getPreviousDecl()) {
298     if (ObjCTypeParamList *written = decl->getTypeParamListAsWritten())
299       return written;
300   }
301 
302   return nullptr;
303 }
304 
setTypeParamList(ObjCTypeParamList * TPL)305 void ObjCInterfaceDecl::setTypeParamList(ObjCTypeParamList *TPL) {
306   TypeParamList = TPL;
307   if (!TPL)
308     return;
309   // Set the declaration context of each of the type parameters.
310   for (auto typeParam : *TypeParamList)
311     typeParam->setDeclContext(this);
312 }
313 
getSuperClass() const314 ObjCInterfaceDecl *ObjCInterfaceDecl::getSuperClass() const {
315   // FIXME: Should make sure no callers ever do this.
316   if (!hasDefinition())
317     return nullptr;
318 
319   if (data().ExternallyCompleted)
320     LoadExternalDefinition();
321 
322   if (const ObjCObjectType *superType = getSuperClassType()) {
323     if (ObjCInterfaceDecl *superDecl = superType->getInterface()) {
324       if (ObjCInterfaceDecl *superDef = superDecl->getDefinition())
325         return superDef;
326 
327       return superDecl;
328     }
329   }
330 
331   return nullptr;
332 }
333 
getSuperClassLoc() const334 SourceLocation ObjCInterfaceDecl::getSuperClassLoc() const {
335   if (TypeSourceInfo *superTInfo = getSuperClassTInfo())
336     return superTInfo->getTypeLoc().getLocStart();
337 
338   return SourceLocation();
339 }
340 
341 /// FindPropertyVisibleInPrimaryClass - Finds declaration of the property
342 /// with name 'PropertyId' in the primary class; including those in protocols
343 /// (direct or indirect) used by the primary class.
344 ///
345 ObjCPropertyDecl *
FindPropertyVisibleInPrimaryClass(IdentifierInfo * PropertyId,ObjCPropertyQueryKind QueryKind) const346 ObjCInterfaceDecl::FindPropertyVisibleInPrimaryClass(
347                        IdentifierInfo *PropertyId,
348                        ObjCPropertyQueryKind QueryKind) const {
349   // FIXME: Should make sure no callers ever do this.
350   if (!hasDefinition())
351     return nullptr;
352 
353   if (data().ExternallyCompleted)
354     LoadExternalDefinition();
355 
356   if (ObjCPropertyDecl *PD =
357       ObjCPropertyDecl::findPropertyDecl(cast<DeclContext>(this), PropertyId,
358                                          QueryKind))
359     return PD;
360 
361   // Look through protocols.
362   for (const auto *I : all_referenced_protocols())
363     if (ObjCPropertyDecl *P = I->FindPropertyDeclaration(PropertyId,
364                                                          QueryKind))
365       return P;
366 
367   return nullptr;
368 }
369 
collectPropertiesToImplement(PropertyMap & PM,PropertyDeclOrder & PO) const370 void ObjCInterfaceDecl::collectPropertiesToImplement(PropertyMap &PM,
371                                                      PropertyDeclOrder &PO) const {
372   for (auto *Prop : properties()) {
373     PM[std::make_pair(Prop->getIdentifier(), Prop->isClassProperty())] = Prop;
374     PO.push_back(Prop);
375   }
376   for (const auto *Ext : known_extensions()) {
377     const ObjCCategoryDecl *ClassExt = Ext;
378     for (auto *Prop : ClassExt->properties()) {
379       PM[std::make_pair(Prop->getIdentifier(), Prop->isClassProperty())] = Prop;
380       PO.push_back(Prop);
381     }
382   }
383   for (const auto *PI : all_referenced_protocols())
384     PI->collectPropertiesToImplement(PM, PO);
385   // Note, the properties declared only in class extensions are still copied
386   // into the main @interface's property list, and therefore we don't
387   // explicitly, have to search class extension properties.
388 }
389 
isArcWeakrefUnavailable() const390 bool ObjCInterfaceDecl::isArcWeakrefUnavailable() const {
391   const ObjCInterfaceDecl *Class = this;
392   while (Class) {
393     if (Class->hasAttr<ArcWeakrefUnavailableAttr>())
394       return true;
395     Class = Class->getSuperClass();
396   }
397   return false;
398 }
399 
isObjCRequiresPropertyDefs() const400 const ObjCInterfaceDecl *ObjCInterfaceDecl::isObjCRequiresPropertyDefs() const {
401   const ObjCInterfaceDecl *Class = this;
402   while (Class) {
403     if (Class->hasAttr<ObjCRequiresPropertyDefsAttr>())
404       return Class;
405     Class = Class->getSuperClass();
406   }
407   return nullptr;
408 }
409 
mergeClassExtensionProtocolList(ObjCProtocolDecl * const * ExtList,unsigned ExtNum,ASTContext & C)410 void ObjCInterfaceDecl::mergeClassExtensionProtocolList(
411                               ObjCProtocolDecl *const* ExtList, unsigned ExtNum,
412                               ASTContext &C)
413 {
414   if (data().ExternallyCompleted)
415     LoadExternalDefinition();
416 
417   if (data().AllReferencedProtocols.empty() &&
418       data().ReferencedProtocols.empty()) {
419     data().AllReferencedProtocols.set(ExtList, ExtNum, C);
420     return;
421   }
422 
423   // Check for duplicate protocol in class's protocol list.
424   // This is O(n*m). But it is extremely rare and number of protocols in
425   // class or its extension are very few.
426   SmallVector<ObjCProtocolDecl*, 8> ProtocolRefs;
427   for (unsigned i = 0; i < ExtNum; i++) {
428     bool protocolExists = false;
429     ObjCProtocolDecl *ProtoInExtension = ExtList[i];
430     for (auto *Proto : all_referenced_protocols()) {
431       if (C.ProtocolCompatibleWithProtocol(ProtoInExtension, Proto)) {
432         protocolExists = true;
433         break;
434       }
435     }
436     // Do we want to warn on a protocol in extension class which
437     // already exist in the class? Probably not.
438     if (!protocolExists)
439       ProtocolRefs.push_back(ProtoInExtension);
440   }
441 
442   if (ProtocolRefs.empty())
443     return;
444 
445   // Merge ProtocolRefs into class's protocol list;
446   ProtocolRefs.append(all_referenced_protocol_begin(),
447                       all_referenced_protocol_end());
448 
449   data().AllReferencedProtocols.set(ProtocolRefs.data(), ProtocolRefs.size(),C);
450 }
451 
452 const ObjCInterfaceDecl *
findInterfaceWithDesignatedInitializers() const453 ObjCInterfaceDecl::findInterfaceWithDesignatedInitializers() const {
454   const ObjCInterfaceDecl *IFace = this;
455   while (IFace) {
456     if (IFace->hasDesignatedInitializers())
457       return IFace;
458     if (!IFace->inheritsDesignatedInitializers())
459       break;
460     IFace = IFace->getSuperClass();
461   }
462   return nullptr;
463 }
464 
isIntroducingInitializers(const ObjCInterfaceDecl * D)465 static bool isIntroducingInitializers(const ObjCInterfaceDecl *D) {
466   for (const auto *MD : D->instance_methods()) {
467     if (MD->getMethodFamily() == OMF_init && !MD->isOverriding())
468       return true;
469   }
470   for (const auto *Ext : D->visible_extensions()) {
471     for (const auto *MD : Ext->instance_methods()) {
472       if (MD->getMethodFamily() == OMF_init && !MD->isOverriding())
473         return true;
474     }
475   }
476   if (const auto *ImplD = D->getImplementation()) {
477     for (const auto *MD : ImplD->instance_methods()) {
478       if (MD->getMethodFamily() == OMF_init && !MD->isOverriding())
479         return true;
480     }
481   }
482   return false;
483 }
484 
inheritsDesignatedInitializers() const485 bool ObjCInterfaceDecl::inheritsDesignatedInitializers() const {
486   switch (data().InheritedDesignatedInitializers) {
487   case DefinitionData::IDI_Inherited:
488     return true;
489   case DefinitionData::IDI_NotInherited:
490     return false;
491   case DefinitionData::IDI_Unknown: {
492     // If the class introduced initializers we conservatively assume that we
493     // don't know if any of them is a designated initializer to avoid possible
494     // misleading warnings.
495     if (isIntroducingInitializers(this)) {
496       data().InheritedDesignatedInitializers = DefinitionData::IDI_NotInherited;
497     } else {
498       if (auto SuperD = getSuperClass()) {
499         data().InheritedDesignatedInitializers =
500           SuperD->declaresOrInheritsDesignatedInitializers() ?
501             DefinitionData::IDI_Inherited :
502             DefinitionData::IDI_NotInherited;
503       } else {
504         data().InheritedDesignatedInitializers =
505           DefinitionData::IDI_NotInherited;
506       }
507     }
508     assert(data().InheritedDesignatedInitializers
509              != DefinitionData::IDI_Unknown);
510     return data().InheritedDesignatedInitializers ==
511         DefinitionData::IDI_Inherited;
512   }
513   }
514 
515   llvm_unreachable("unexpected InheritedDesignatedInitializers value");
516 }
517 
getDesignatedInitializers(llvm::SmallVectorImpl<const ObjCMethodDecl * > & Methods) const518 void ObjCInterfaceDecl::getDesignatedInitializers(
519     llvm::SmallVectorImpl<const ObjCMethodDecl *> &Methods) const {
520   // Check for a complete definition and recover if not so.
521   if (!isThisDeclarationADefinition())
522     return;
523   if (data().ExternallyCompleted)
524     LoadExternalDefinition();
525 
526   const ObjCInterfaceDecl *IFace= findInterfaceWithDesignatedInitializers();
527   if (!IFace)
528     return;
529 
530   for (const auto *MD : IFace->instance_methods())
531     if (MD->isThisDeclarationADesignatedInitializer())
532       Methods.push_back(MD);
533   for (const auto *Ext : IFace->visible_extensions()) {
534     for (const auto *MD : Ext->instance_methods())
535       if (MD->isThisDeclarationADesignatedInitializer())
536         Methods.push_back(MD);
537   }
538 }
539 
isDesignatedInitializer(Selector Sel,const ObjCMethodDecl ** InitMethod) const540 bool ObjCInterfaceDecl::isDesignatedInitializer(Selector Sel,
541                                       const ObjCMethodDecl **InitMethod) const {
542   // Check for a complete definition and recover if not so.
543   if (!isThisDeclarationADefinition())
544     return false;
545   if (data().ExternallyCompleted)
546     LoadExternalDefinition();
547 
548   const ObjCInterfaceDecl *IFace= findInterfaceWithDesignatedInitializers();
549   if (!IFace)
550     return false;
551 
552   if (const ObjCMethodDecl *MD = IFace->getInstanceMethod(Sel)) {
553     if (MD->isThisDeclarationADesignatedInitializer()) {
554       if (InitMethod)
555         *InitMethod = MD;
556       return true;
557     }
558   }
559   for (const auto *Ext : IFace->visible_extensions()) {
560     if (const ObjCMethodDecl *MD = Ext->getInstanceMethod(Sel)) {
561       if (MD->isThisDeclarationADesignatedInitializer()) {
562         if (InitMethod)
563           *InitMethod = MD;
564         return true;
565       }
566     }
567   }
568   return false;
569 }
570 
allocateDefinitionData()571 void ObjCInterfaceDecl::allocateDefinitionData() {
572   assert(!hasDefinition() && "ObjC class already has a definition");
573   Data.setPointer(new (getASTContext()) DefinitionData());
574   Data.getPointer()->Definition = this;
575 
576   // Make the type point at the definition, now that we have one.
577   if (TypeForDecl)
578     cast<ObjCInterfaceType>(TypeForDecl)->Decl = this;
579 }
580 
startDefinition()581 void ObjCInterfaceDecl::startDefinition() {
582   allocateDefinitionData();
583 
584   // Update all of the declarations with a pointer to the definition.
585   for (auto RD : redecls()) {
586     if (RD != this)
587       RD->Data = Data;
588   }
589 }
590 
lookupInstanceVariable(IdentifierInfo * ID,ObjCInterfaceDecl * & clsDeclared)591 ObjCIvarDecl *ObjCInterfaceDecl::lookupInstanceVariable(IdentifierInfo *ID,
592                                               ObjCInterfaceDecl *&clsDeclared) {
593   // FIXME: Should make sure no callers ever do this.
594   if (!hasDefinition())
595     return nullptr;
596 
597   if (data().ExternallyCompleted)
598     LoadExternalDefinition();
599 
600   ObjCInterfaceDecl* ClassDecl = this;
601   while (ClassDecl != nullptr) {
602     if (ObjCIvarDecl *I = ClassDecl->getIvarDecl(ID)) {
603       clsDeclared = ClassDecl;
604       return I;
605     }
606 
607     for (const auto *Ext : ClassDecl->visible_extensions()) {
608       if (ObjCIvarDecl *I = Ext->getIvarDecl(ID)) {
609         clsDeclared = ClassDecl;
610         return I;
611       }
612     }
613 
614     ClassDecl = ClassDecl->getSuperClass();
615   }
616   return nullptr;
617 }
618 
619 /// lookupInheritedClass - This method returns ObjCInterfaceDecl * of the super
620 /// class whose name is passed as argument. If it is not one of the super classes
621 /// the it returns NULL.
lookupInheritedClass(const IdentifierInfo * ICName)622 ObjCInterfaceDecl *ObjCInterfaceDecl::lookupInheritedClass(
623                                         const IdentifierInfo*ICName) {
624   // FIXME: Should make sure no callers ever do this.
625   if (!hasDefinition())
626     return nullptr;
627 
628   if (data().ExternallyCompleted)
629     LoadExternalDefinition();
630 
631   ObjCInterfaceDecl* ClassDecl = this;
632   while (ClassDecl != nullptr) {
633     if (ClassDecl->getIdentifier() == ICName)
634       return ClassDecl;
635     ClassDecl = ClassDecl->getSuperClass();
636   }
637   return nullptr;
638 }
639 
640 ObjCProtocolDecl *
lookupNestedProtocol(IdentifierInfo * Name)641 ObjCInterfaceDecl::lookupNestedProtocol(IdentifierInfo *Name) {
642   for (auto *P : all_referenced_protocols())
643     if (P->lookupProtocolNamed(Name))
644       return P;
645   ObjCInterfaceDecl *SuperClass = getSuperClass();
646   return SuperClass ? SuperClass->lookupNestedProtocol(Name) : nullptr;
647 }
648 
649 /// lookupMethod - This method returns an instance/class method by looking in
650 /// the class, its categories, and its super classes (using a linear search).
651 /// When argument category "C" is specified, any implicit method found
652 /// in this category is ignored.
lookupMethod(Selector Sel,bool isInstance,bool shallowCategoryLookup,bool followSuper,const ObjCCategoryDecl * C) const653 ObjCMethodDecl *ObjCInterfaceDecl::lookupMethod(Selector Sel,
654                                                 bool isInstance,
655                                                 bool shallowCategoryLookup,
656                                                 bool followSuper,
657                                                 const ObjCCategoryDecl *C) const
658 {
659   // FIXME: Should make sure no callers ever do this.
660   if (!hasDefinition())
661     return nullptr;
662 
663   const ObjCInterfaceDecl* ClassDecl = this;
664   ObjCMethodDecl *MethodDecl = nullptr;
665 
666   if (data().ExternallyCompleted)
667     LoadExternalDefinition();
668 
669   while (ClassDecl) {
670     // 1. Look through primary class.
671     if ((MethodDecl = ClassDecl->getMethod(Sel, isInstance)))
672       return MethodDecl;
673 
674     // 2. Didn't find one yet - now look through categories.
675     for (const auto *Cat : ClassDecl->visible_categories())
676       if ((MethodDecl = Cat->getMethod(Sel, isInstance)))
677         if (C != Cat || !MethodDecl->isImplicit())
678           return MethodDecl;
679 
680     // 3. Didn't find one yet - look through primary class's protocols.
681     for (const auto *I : ClassDecl->protocols())
682       if ((MethodDecl = I->lookupMethod(Sel, isInstance)))
683         return MethodDecl;
684 
685     // 4. Didn't find one yet - now look through categories' protocols
686     if (!shallowCategoryLookup)
687       for (const auto *Cat : ClassDecl->visible_categories()) {
688         // Didn't find one yet - look through protocols.
689         const ObjCList<ObjCProtocolDecl> &Protocols =
690           Cat->getReferencedProtocols();
691         for (ObjCList<ObjCProtocolDecl>::iterator I = Protocols.begin(),
692              E = Protocols.end(); I != E; ++I)
693           if ((MethodDecl = (*I)->lookupMethod(Sel, isInstance)))
694             if (C != Cat || !MethodDecl->isImplicit())
695               return MethodDecl;
696       }
697 
698 
699     if (!followSuper)
700       return nullptr;
701 
702     // 5. Get to the super class (if any).
703     ClassDecl = ClassDecl->getSuperClass();
704   }
705   return nullptr;
706 }
707 
708 // Will search "local" class/category implementations for a method decl.
709 // If failed, then we search in class's root for an instance method.
710 // Returns 0 if no method is found.
lookupPrivateMethod(const Selector & Sel,bool Instance) const711 ObjCMethodDecl *ObjCInterfaceDecl::lookupPrivateMethod(
712                                    const Selector &Sel,
713                                    bool Instance) const {
714   // FIXME: Should make sure no callers ever do this.
715   if (!hasDefinition())
716     return nullptr;
717 
718   if (data().ExternallyCompleted)
719     LoadExternalDefinition();
720 
721   ObjCMethodDecl *Method = nullptr;
722   if (ObjCImplementationDecl *ImpDecl = getImplementation())
723     Method = Instance ? ImpDecl->getInstanceMethod(Sel)
724                       : ImpDecl->getClassMethod(Sel);
725 
726   // Look through local category implementations associated with the class.
727   if (!Method)
728     Method = getCategoryMethod(Sel, Instance);
729 
730   // Before we give up, check if the selector is an instance method.
731   // But only in the root. This matches gcc's behavior and what the
732   // runtime expects.
733   if (!Instance && !Method && !getSuperClass()) {
734     Method = lookupInstanceMethod(Sel);
735     // Look through local category implementations associated
736     // with the root class.
737     if (!Method)
738       Method = lookupPrivateMethod(Sel, true);
739   }
740 
741   if (!Method && getSuperClass())
742     return getSuperClass()->lookupPrivateMethod(Sel, Instance);
743   return Method;
744 }
745 
746 //===----------------------------------------------------------------------===//
747 // ObjCMethodDecl
748 //===----------------------------------------------------------------------===//
749 
Create(ASTContext & C,SourceLocation beginLoc,SourceLocation endLoc,Selector SelInfo,QualType T,TypeSourceInfo * ReturnTInfo,DeclContext * contextDecl,bool isInstance,bool isVariadic,bool isPropertyAccessor,bool isImplicitlyDeclared,bool isDefined,ImplementationControl impControl,bool HasRelatedResultType)750 ObjCMethodDecl *ObjCMethodDecl::Create(
751     ASTContext &C, SourceLocation beginLoc, SourceLocation endLoc,
752     Selector SelInfo, QualType T, TypeSourceInfo *ReturnTInfo,
753     DeclContext *contextDecl, bool isInstance, bool isVariadic,
754     bool isPropertyAccessor, bool isImplicitlyDeclared, bool isDefined,
755     ImplementationControl impControl, bool HasRelatedResultType) {
756   return new (C, contextDecl) ObjCMethodDecl(
757       beginLoc, endLoc, SelInfo, T, ReturnTInfo, contextDecl, isInstance,
758       isVariadic, isPropertyAccessor, isImplicitlyDeclared, isDefined,
759       impControl, HasRelatedResultType);
760 }
761 
CreateDeserialized(ASTContext & C,unsigned ID)762 ObjCMethodDecl *ObjCMethodDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
763   return new (C, ID) ObjCMethodDecl(SourceLocation(), SourceLocation(),
764                                     Selector(), QualType(), nullptr, nullptr);
765 }
766 
isThisDeclarationADesignatedInitializer() const767 bool ObjCMethodDecl::isThisDeclarationADesignatedInitializer() const {
768   return getMethodFamily() == OMF_init &&
769       hasAttr<ObjCDesignatedInitializerAttr>();
770 }
771 
isDesignatedInitializerForTheInterface(const ObjCMethodDecl ** InitMethod) const772 bool ObjCMethodDecl::isDesignatedInitializerForTheInterface(
773     const ObjCMethodDecl **InitMethod) const {
774   if (getMethodFamily() != OMF_init)
775     return false;
776   const DeclContext *DC = getDeclContext();
777   if (isa<ObjCProtocolDecl>(DC))
778     return false;
779   if (const ObjCInterfaceDecl *ID = getClassInterface())
780     return ID->isDesignatedInitializer(getSelector(), InitMethod);
781   return false;
782 }
783 
getBody() const784 Stmt *ObjCMethodDecl::getBody() const {
785   return Body.get(getASTContext().getExternalSource());
786 }
787 
setAsRedeclaration(const ObjCMethodDecl * PrevMethod)788 void ObjCMethodDecl::setAsRedeclaration(const ObjCMethodDecl *PrevMethod) {
789   assert(PrevMethod);
790   getASTContext().setObjCMethodRedeclaration(PrevMethod, this);
791   IsRedeclaration = true;
792   PrevMethod->HasRedeclaration = true;
793 }
794 
setParamsAndSelLocs(ASTContext & C,ArrayRef<ParmVarDecl * > Params,ArrayRef<SourceLocation> SelLocs)795 void ObjCMethodDecl::setParamsAndSelLocs(ASTContext &C,
796                                          ArrayRef<ParmVarDecl*> Params,
797                                          ArrayRef<SourceLocation> SelLocs) {
798   ParamsAndSelLocs = nullptr;
799   NumParams = Params.size();
800   if (Params.empty() && SelLocs.empty())
801     return;
802 
803   static_assert(llvm::AlignOf<ParmVarDecl *>::Alignment >=
804                     llvm::AlignOf<SourceLocation>::Alignment,
805                 "Alignment not sufficient for SourceLocation");
806 
807   unsigned Size = sizeof(ParmVarDecl *) * NumParams +
808                   sizeof(SourceLocation) * SelLocs.size();
809   ParamsAndSelLocs = C.Allocate(Size);
810   std::copy(Params.begin(), Params.end(), getParams());
811   std::copy(SelLocs.begin(), SelLocs.end(), getStoredSelLocs());
812 }
813 
getSelectorLocs(SmallVectorImpl<SourceLocation> & SelLocs) const814 void ObjCMethodDecl::getSelectorLocs(
815                                SmallVectorImpl<SourceLocation> &SelLocs) const {
816   for (unsigned i = 0, e = getNumSelectorLocs(); i != e; ++i)
817     SelLocs.push_back(getSelectorLoc(i));
818 }
819 
setMethodParams(ASTContext & C,ArrayRef<ParmVarDecl * > Params,ArrayRef<SourceLocation> SelLocs)820 void ObjCMethodDecl::setMethodParams(ASTContext &C,
821                                      ArrayRef<ParmVarDecl*> Params,
822                                      ArrayRef<SourceLocation> SelLocs) {
823   assert((!SelLocs.empty() || isImplicit()) &&
824          "No selector locs for non-implicit method");
825   if (isImplicit())
826     return setParamsAndSelLocs(C, Params, llvm::None);
827 
828   SelLocsKind = hasStandardSelectorLocs(getSelector(), SelLocs, Params,
829                                         DeclEndLoc);
830   if (SelLocsKind != SelLoc_NonStandard)
831     return setParamsAndSelLocs(C, Params, llvm::None);
832 
833   setParamsAndSelLocs(C, Params, SelLocs);
834 }
835 
836 /// \brief A definition will return its interface declaration.
837 /// An interface declaration will return its definition.
838 /// Otherwise it will return itself.
getNextRedeclarationImpl()839 ObjCMethodDecl *ObjCMethodDecl::getNextRedeclarationImpl() {
840   ASTContext &Ctx = getASTContext();
841   ObjCMethodDecl *Redecl = nullptr;
842   if (HasRedeclaration)
843     Redecl = const_cast<ObjCMethodDecl*>(Ctx.getObjCMethodRedeclaration(this));
844   if (Redecl)
845     return Redecl;
846 
847   Decl *CtxD = cast<Decl>(getDeclContext());
848 
849   if (!CtxD->isInvalidDecl()) {
850     if (ObjCInterfaceDecl *IFD = dyn_cast<ObjCInterfaceDecl>(CtxD)) {
851       if (ObjCImplementationDecl *ImplD = Ctx.getObjCImplementation(IFD))
852         if (!ImplD->isInvalidDecl())
853           Redecl = ImplD->getMethod(getSelector(), isInstanceMethod());
854 
855     } else if (ObjCCategoryDecl *CD = dyn_cast<ObjCCategoryDecl>(CtxD)) {
856       if (ObjCCategoryImplDecl *ImplD = Ctx.getObjCImplementation(CD))
857         if (!ImplD->isInvalidDecl())
858           Redecl = ImplD->getMethod(getSelector(), isInstanceMethod());
859 
860     } else if (ObjCImplementationDecl *ImplD =
861                  dyn_cast<ObjCImplementationDecl>(CtxD)) {
862       if (ObjCInterfaceDecl *IFD = ImplD->getClassInterface())
863         if (!IFD->isInvalidDecl())
864           Redecl = IFD->getMethod(getSelector(), isInstanceMethod());
865 
866     } else if (ObjCCategoryImplDecl *CImplD =
867                  dyn_cast<ObjCCategoryImplDecl>(CtxD)) {
868       if (ObjCCategoryDecl *CatD = CImplD->getCategoryDecl())
869         if (!CatD->isInvalidDecl())
870           Redecl = CatD->getMethod(getSelector(), isInstanceMethod());
871     }
872   }
873 
874   if (!Redecl && isRedeclaration()) {
875     // This is the last redeclaration, go back to the first method.
876     return cast<ObjCContainerDecl>(CtxD)->getMethod(getSelector(),
877                                                     isInstanceMethod());
878   }
879 
880   return Redecl ? Redecl : this;
881 }
882 
getCanonicalDecl()883 ObjCMethodDecl *ObjCMethodDecl::getCanonicalDecl() {
884   Decl *CtxD = cast<Decl>(getDeclContext());
885 
886   if (ObjCImplementationDecl *ImplD = dyn_cast<ObjCImplementationDecl>(CtxD)) {
887     if (ObjCInterfaceDecl *IFD = ImplD->getClassInterface())
888       if (ObjCMethodDecl *MD = IFD->getMethod(getSelector(),
889                                               isInstanceMethod()))
890         return MD;
891 
892   } else if (ObjCCategoryImplDecl *CImplD =
893                dyn_cast<ObjCCategoryImplDecl>(CtxD)) {
894     if (ObjCCategoryDecl *CatD = CImplD->getCategoryDecl())
895       if (ObjCMethodDecl *MD = CatD->getMethod(getSelector(),
896                                                isInstanceMethod()))
897         return MD;
898   }
899 
900   if (isRedeclaration())
901     return cast<ObjCContainerDecl>(CtxD)->getMethod(getSelector(),
902                                                     isInstanceMethod());
903 
904   return this;
905 }
906 
getLocEnd() const907 SourceLocation ObjCMethodDecl::getLocEnd() const {
908   if (Stmt *Body = getBody())
909     return Body->getLocEnd();
910   return DeclEndLoc;
911 }
912 
getMethodFamily() const913 ObjCMethodFamily ObjCMethodDecl::getMethodFamily() const {
914   ObjCMethodFamily family = static_cast<ObjCMethodFamily>(Family);
915   if (family != static_cast<unsigned>(InvalidObjCMethodFamily))
916     return family;
917 
918   // Check for an explicit attribute.
919   if (const ObjCMethodFamilyAttr *attr = getAttr<ObjCMethodFamilyAttr>()) {
920     // The unfortunate necessity of mapping between enums here is due
921     // to the attributes framework.
922     switch (attr->getFamily()) {
923     case ObjCMethodFamilyAttr::OMF_None: family = OMF_None; break;
924     case ObjCMethodFamilyAttr::OMF_alloc: family = OMF_alloc; break;
925     case ObjCMethodFamilyAttr::OMF_copy: family = OMF_copy; break;
926     case ObjCMethodFamilyAttr::OMF_init: family = OMF_init; break;
927     case ObjCMethodFamilyAttr::OMF_mutableCopy: family = OMF_mutableCopy; break;
928     case ObjCMethodFamilyAttr::OMF_new: family = OMF_new; break;
929     }
930     Family = static_cast<unsigned>(family);
931     return family;
932   }
933 
934   family = getSelector().getMethodFamily();
935   switch (family) {
936   case OMF_None: break;
937 
938   // init only has a conventional meaning for an instance method, and
939   // it has to return an object.
940   case OMF_init:
941     if (!isInstanceMethod() || !getReturnType()->isObjCObjectPointerType())
942       family = OMF_None;
943     break;
944 
945   // alloc/copy/new have a conventional meaning for both class and
946   // instance methods, but they require an object return.
947   case OMF_alloc:
948   case OMF_copy:
949   case OMF_mutableCopy:
950   case OMF_new:
951     if (!getReturnType()->isObjCObjectPointerType())
952       family = OMF_None;
953     break;
954 
955   // These selectors have a conventional meaning only for instance methods.
956   case OMF_dealloc:
957   case OMF_finalize:
958   case OMF_retain:
959   case OMF_release:
960   case OMF_autorelease:
961   case OMF_retainCount:
962   case OMF_self:
963     if (!isInstanceMethod())
964       family = OMF_None;
965     break;
966 
967   case OMF_initialize:
968     if (isInstanceMethod() || !getReturnType()->isVoidType())
969       family = OMF_None;
970     break;
971 
972   case OMF_performSelector:
973     if (!isInstanceMethod() || !getReturnType()->isObjCIdType())
974       family = OMF_None;
975     else {
976       unsigned noParams = param_size();
977       if (noParams < 1 || noParams > 3)
978         family = OMF_None;
979       else {
980         ObjCMethodDecl::param_type_iterator it = param_type_begin();
981         QualType ArgT = (*it);
982         if (!ArgT->isObjCSelType()) {
983           family = OMF_None;
984           break;
985         }
986         while (--noParams) {
987           it++;
988           ArgT = (*it);
989           if (!ArgT->isObjCIdType()) {
990             family = OMF_None;
991             break;
992           }
993         }
994       }
995     }
996     break;
997 
998   }
999 
1000   // Cache the result.
1001   Family = static_cast<unsigned>(family);
1002   return family;
1003 }
1004 
getSelfType(ASTContext & Context,const ObjCInterfaceDecl * OID,bool & selfIsPseudoStrong,bool & selfIsConsumed)1005 QualType ObjCMethodDecl::getSelfType(ASTContext &Context,
1006                                      const ObjCInterfaceDecl *OID,
1007                                      bool &selfIsPseudoStrong,
1008                                      bool &selfIsConsumed) {
1009   QualType selfTy;
1010   selfIsPseudoStrong = false;
1011   selfIsConsumed = false;
1012   if (isInstanceMethod()) {
1013     // There may be no interface context due to error in declaration
1014     // of the interface (which has been reported). Recover gracefully.
1015     if (OID) {
1016       selfTy = Context.getObjCInterfaceType(OID);
1017       selfTy = Context.getObjCObjectPointerType(selfTy);
1018     } else {
1019       selfTy = Context.getObjCIdType();
1020     }
1021   } else // we have a factory method.
1022     selfTy = Context.getObjCClassType();
1023 
1024   if (Context.getLangOpts().ObjCAutoRefCount) {
1025     if (isInstanceMethod()) {
1026       selfIsConsumed = hasAttr<NSConsumesSelfAttr>();
1027 
1028       // 'self' is always __strong.  It's actually pseudo-strong except
1029       // in init methods (or methods labeled ns_consumes_self), though.
1030       Qualifiers qs;
1031       qs.setObjCLifetime(Qualifiers::OCL_Strong);
1032       selfTy = Context.getQualifiedType(selfTy, qs);
1033 
1034       // In addition, 'self' is const unless this is an init method.
1035       if (getMethodFamily() != OMF_init && !selfIsConsumed) {
1036         selfTy = selfTy.withConst();
1037         selfIsPseudoStrong = true;
1038       }
1039     }
1040     else {
1041       assert(isClassMethod());
1042       // 'self' is always const in class methods.
1043       selfTy = selfTy.withConst();
1044       selfIsPseudoStrong = true;
1045     }
1046   }
1047   return selfTy;
1048 }
1049 
createImplicitParams(ASTContext & Context,const ObjCInterfaceDecl * OID)1050 void ObjCMethodDecl::createImplicitParams(ASTContext &Context,
1051                                           const ObjCInterfaceDecl *OID) {
1052   bool selfIsPseudoStrong, selfIsConsumed;
1053   QualType selfTy =
1054     getSelfType(Context, OID, selfIsPseudoStrong, selfIsConsumed);
1055   ImplicitParamDecl *self
1056     = ImplicitParamDecl::Create(Context, this, SourceLocation(),
1057                                 &Context.Idents.get("self"), selfTy);
1058   setSelfDecl(self);
1059 
1060   if (selfIsConsumed)
1061     self->addAttr(NSConsumedAttr::CreateImplicit(Context));
1062 
1063   if (selfIsPseudoStrong)
1064     self->setARCPseudoStrong(true);
1065 
1066   setCmdDecl(ImplicitParamDecl::Create(Context, this, SourceLocation(),
1067                                        &Context.Idents.get("_cmd"),
1068                                        Context.getObjCSelType()));
1069 }
1070 
getClassInterface()1071 ObjCInterfaceDecl *ObjCMethodDecl::getClassInterface() {
1072   if (ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(getDeclContext()))
1073     return ID;
1074   if (ObjCCategoryDecl *CD = dyn_cast<ObjCCategoryDecl>(getDeclContext()))
1075     return CD->getClassInterface();
1076   if (ObjCImplDecl *IMD = dyn_cast<ObjCImplDecl>(getDeclContext()))
1077     return IMD->getClassInterface();
1078   if (isa<ObjCProtocolDecl>(getDeclContext()))
1079     return nullptr;
1080   llvm_unreachable("unknown method context");
1081 }
1082 
getReturnTypeSourceRange() const1083 SourceRange ObjCMethodDecl::getReturnTypeSourceRange() const {
1084   const auto *TSI = getReturnTypeSourceInfo();
1085   if (TSI)
1086     return TSI->getTypeLoc().getSourceRange();
1087   return SourceRange();
1088 }
1089 
getSendResultType() const1090 QualType ObjCMethodDecl::getSendResultType() const {
1091   ASTContext &Ctx = getASTContext();
1092   return getReturnType().getNonLValueExprType(Ctx)
1093            .substObjCTypeArgs(Ctx, {}, ObjCSubstitutionContext::Result);
1094 }
1095 
getSendResultType(QualType receiverType) const1096 QualType ObjCMethodDecl::getSendResultType(QualType receiverType) const {
1097   // FIXME: Handle related result types here.
1098 
1099   return getReturnType().getNonLValueExprType(getASTContext())
1100            .substObjCMemberType(receiverType, getDeclContext(),
1101                                 ObjCSubstitutionContext::Result);
1102 }
1103 
CollectOverriddenMethodsRecurse(const ObjCContainerDecl * Container,const ObjCMethodDecl * Method,SmallVectorImpl<const ObjCMethodDecl * > & Methods,bool MovedToSuper)1104 static void CollectOverriddenMethodsRecurse(const ObjCContainerDecl *Container,
1105                                             const ObjCMethodDecl *Method,
1106                                SmallVectorImpl<const ObjCMethodDecl *> &Methods,
1107                                             bool MovedToSuper) {
1108   if (!Container)
1109     return;
1110 
1111   // In categories look for overriden methods from protocols. A method from
1112   // category is not "overriden" since it is considered as the "same" method
1113   // (same USR) as the one from the interface.
1114   if (const ObjCCategoryDecl *
1115         Category = dyn_cast<ObjCCategoryDecl>(Container)) {
1116     // Check whether we have a matching method at this category but only if we
1117     // are at the super class level.
1118     if (MovedToSuper)
1119       if (ObjCMethodDecl *
1120             Overridden = Container->getMethod(Method->getSelector(),
1121                                               Method->isInstanceMethod(),
1122                                               /*AllowHidden=*/true))
1123         if (Method != Overridden) {
1124           // We found an override at this category; there is no need to look
1125           // into its protocols.
1126           Methods.push_back(Overridden);
1127           return;
1128         }
1129 
1130     for (const auto *P : Category->protocols())
1131       CollectOverriddenMethodsRecurse(P, Method, Methods, MovedToSuper);
1132     return;
1133   }
1134 
1135   // Check whether we have a matching method at this level.
1136   if (const ObjCMethodDecl *
1137         Overridden = Container->getMethod(Method->getSelector(),
1138                                           Method->isInstanceMethod(),
1139                                           /*AllowHidden=*/true))
1140     if (Method != Overridden) {
1141       // We found an override at this level; there is no need to look
1142       // into other protocols or categories.
1143       Methods.push_back(Overridden);
1144       return;
1145     }
1146 
1147   if (const ObjCProtocolDecl *Protocol = dyn_cast<ObjCProtocolDecl>(Container)){
1148     for (const auto *P : Protocol->protocols())
1149       CollectOverriddenMethodsRecurse(P, Method, Methods, MovedToSuper);
1150   }
1151 
1152   if (const ObjCInterfaceDecl *
1153         Interface = dyn_cast<ObjCInterfaceDecl>(Container)) {
1154     for (const auto *P : Interface->protocols())
1155       CollectOverriddenMethodsRecurse(P, Method, Methods, MovedToSuper);
1156 
1157     for (const auto *Cat : Interface->known_categories())
1158       CollectOverriddenMethodsRecurse(Cat, Method, Methods, MovedToSuper);
1159 
1160     if (const ObjCInterfaceDecl *Super = Interface->getSuperClass())
1161       return CollectOverriddenMethodsRecurse(Super, Method, Methods,
1162                                              /*MovedToSuper=*/true);
1163   }
1164 }
1165 
CollectOverriddenMethods(const ObjCContainerDecl * Container,const ObjCMethodDecl * Method,SmallVectorImpl<const ObjCMethodDecl * > & Methods)1166 static inline void CollectOverriddenMethods(const ObjCContainerDecl *Container,
1167                                             const ObjCMethodDecl *Method,
1168                              SmallVectorImpl<const ObjCMethodDecl *> &Methods) {
1169   CollectOverriddenMethodsRecurse(Container, Method, Methods,
1170                                   /*MovedToSuper=*/false);
1171 }
1172 
collectOverriddenMethodsSlow(const ObjCMethodDecl * Method,SmallVectorImpl<const ObjCMethodDecl * > & overridden)1173 static void collectOverriddenMethodsSlow(const ObjCMethodDecl *Method,
1174                           SmallVectorImpl<const ObjCMethodDecl *> &overridden) {
1175   assert(Method->isOverriding());
1176 
1177   if (const ObjCProtocolDecl *
1178         ProtD = dyn_cast<ObjCProtocolDecl>(Method->getDeclContext())) {
1179     CollectOverriddenMethods(ProtD, Method, overridden);
1180 
1181   } else if (const ObjCImplDecl *
1182                IMD = dyn_cast<ObjCImplDecl>(Method->getDeclContext())) {
1183     const ObjCInterfaceDecl *ID = IMD->getClassInterface();
1184     if (!ID)
1185       return;
1186     // Start searching for overridden methods using the method from the
1187     // interface as starting point.
1188     if (const ObjCMethodDecl *IFaceMeth = ID->getMethod(Method->getSelector(),
1189                                                     Method->isInstanceMethod(),
1190                                                     /*AllowHidden=*/true))
1191       Method = IFaceMeth;
1192     CollectOverriddenMethods(ID, Method, overridden);
1193 
1194   } else if (const ObjCCategoryDecl *
1195                CatD = dyn_cast<ObjCCategoryDecl>(Method->getDeclContext())) {
1196     const ObjCInterfaceDecl *ID = CatD->getClassInterface();
1197     if (!ID)
1198       return;
1199     // Start searching for overridden methods using the method from the
1200     // interface as starting point.
1201     if (const ObjCMethodDecl *IFaceMeth = ID->getMethod(Method->getSelector(),
1202                                                      Method->isInstanceMethod(),
1203                                                      /*AllowHidden=*/true))
1204       Method = IFaceMeth;
1205     CollectOverriddenMethods(ID, Method, overridden);
1206 
1207   } else {
1208     CollectOverriddenMethods(
1209                   dyn_cast_or_null<ObjCContainerDecl>(Method->getDeclContext()),
1210                   Method, overridden);
1211   }
1212 }
1213 
getOverriddenMethods(SmallVectorImpl<const ObjCMethodDecl * > & Overridden) const1214 void ObjCMethodDecl::getOverriddenMethods(
1215                     SmallVectorImpl<const ObjCMethodDecl *> &Overridden) const {
1216   const ObjCMethodDecl *Method = this;
1217 
1218   if (Method->isRedeclaration()) {
1219     Method = cast<ObjCContainerDecl>(Method->getDeclContext())->
1220                    getMethod(Method->getSelector(), Method->isInstanceMethod());
1221   }
1222 
1223   if (Method->isOverriding()) {
1224     collectOverriddenMethodsSlow(Method, Overridden);
1225     assert(!Overridden.empty() &&
1226            "ObjCMethodDecl's overriding bit is not as expected");
1227   }
1228 }
1229 
1230 const ObjCPropertyDecl *
findPropertyDecl(bool CheckOverrides) const1231 ObjCMethodDecl::findPropertyDecl(bool CheckOverrides) const {
1232   Selector Sel = getSelector();
1233   unsigned NumArgs = Sel.getNumArgs();
1234   if (NumArgs > 1)
1235     return nullptr;
1236 
1237   if (isPropertyAccessor()) {
1238     const ObjCContainerDecl *Container = cast<ObjCContainerDecl>(getParent());
1239     bool IsGetter = (NumArgs == 0);
1240     bool IsInstance = isInstanceMethod();
1241 
1242     /// Local function that attempts to find a matching property within the
1243     /// given Objective-C container.
1244     auto findMatchingProperty =
1245       [&](const ObjCContainerDecl *Container) -> const ObjCPropertyDecl * {
1246       if (IsInstance) {
1247         for (const auto *I : Container->instance_properties()) {
1248           Selector NextSel = IsGetter ? I->getGetterName()
1249                                       : I->getSetterName();
1250           if (NextSel == Sel)
1251             return I;
1252         }
1253       } else {
1254         for (const auto *I : Container->class_properties()) {
1255           Selector NextSel = IsGetter ? I->getGetterName()
1256                                       : I->getSetterName();
1257           if (NextSel == Sel)
1258             return I;
1259         }
1260       }
1261 
1262       return nullptr;
1263     };
1264 
1265     // Look in the container we were given.
1266     if (const auto *Found = findMatchingProperty(Container))
1267       return Found;
1268 
1269     // If we're in a category or extension, look in the main class.
1270     const ObjCInterfaceDecl *ClassDecl = nullptr;
1271     if (const auto *Category = dyn_cast<ObjCCategoryDecl>(Container)) {
1272       ClassDecl = Category->getClassInterface();
1273       if (const auto *Found = findMatchingProperty(ClassDecl))
1274         return Found;
1275     } else {
1276       // Determine whether the container is a class.
1277       ClassDecl = dyn_cast<ObjCInterfaceDecl>(Container);
1278     }
1279 
1280     // If we have a class, check its visible extensions.
1281     if (ClassDecl) {
1282       for (const auto *Ext : ClassDecl->visible_extensions()) {
1283         if (Ext == Container)
1284           continue;
1285 
1286         if (const auto *Found = findMatchingProperty(Ext))
1287           return Found;
1288       }
1289     }
1290 
1291     llvm_unreachable("Marked as a property accessor but no property found!");
1292   }
1293 
1294   if (!CheckOverrides)
1295     return nullptr;
1296 
1297   typedef SmallVector<const ObjCMethodDecl *, 8> OverridesTy;
1298   OverridesTy Overrides;
1299   getOverriddenMethods(Overrides);
1300   for (OverridesTy::const_iterator I = Overrides.begin(), E = Overrides.end();
1301        I != E; ++I) {
1302     if (const ObjCPropertyDecl *Prop = (*I)->findPropertyDecl(false))
1303       return Prop;
1304   }
1305 
1306   return nullptr;
1307 }
1308 
1309 //===----------------------------------------------------------------------===//
1310 // ObjCTypeParamDecl
1311 //===----------------------------------------------------------------------===//
1312 
anchor()1313 void ObjCTypeParamDecl::anchor() { }
1314 
Create(ASTContext & ctx,DeclContext * dc,ObjCTypeParamVariance variance,SourceLocation varianceLoc,unsigned index,SourceLocation nameLoc,IdentifierInfo * name,SourceLocation colonLoc,TypeSourceInfo * boundInfo)1315 ObjCTypeParamDecl *ObjCTypeParamDecl::Create(ASTContext &ctx, DeclContext *dc,
1316                                              ObjCTypeParamVariance variance,
1317                                              SourceLocation varianceLoc,
1318                                              unsigned index,
1319                                              SourceLocation nameLoc,
1320                                              IdentifierInfo *name,
1321                                              SourceLocation colonLoc,
1322                                              TypeSourceInfo *boundInfo) {
1323   return new (ctx, dc) ObjCTypeParamDecl(ctx, dc, variance, varianceLoc, index,
1324                                          nameLoc, name, colonLoc, boundInfo);
1325 }
1326 
CreateDeserialized(ASTContext & ctx,unsigned ID)1327 ObjCTypeParamDecl *ObjCTypeParamDecl::CreateDeserialized(ASTContext &ctx,
1328                                                          unsigned ID) {
1329   return new (ctx, ID) ObjCTypeParamDecl(ctx, nullptr,
1330                                          ObjCTypeParamVariance::Invariant,
1331                                          SourceLocation(), 0, SourceLocation(),
1332                                          nullptr, SourceLocation(), nullptr);
1333 }
1334 
getSourceRange() const1335 SourceRange ObjCTypeParamDecl::getSourceRange() const {
1336   SourceLocation startLoc = VarianceLoc;
1337   if (startLoc.isInvalid())
1338     startLoc = getLocation();
1339 
1340   if (hasExplicitBound()) {
1341     return SourceRange(startLoc,
1342                        getTypeSourceInfo()->getTypeLoc().getEndLoc());
1343   }
1344 
1345   return SourceRange(startLoc);
1346 }
1347 
1348 //===----------------------------------------------------------------------===//
1349 // ObjCTypeParamList
1350 //===----------------------------------------------------------------------===//
ObjCTypeParamList(SourceLocation lAngleLoc,ArrayRef<ObjCTypeParamDecl * > typeParams,SourceLocation rAngleLoc)1351 ObjCTypeParamList::ObjCTypeParamList(SourceLocation lAngleLoc,
1352                                      ArrayRef<ObjCTypeParamDecl *> typeParams,
1353                                      SourceLocation rAngleLoc)
1354   : NumParams(typeParams.size())
1355 {
1356   Brackets.Begin = lAngleLoc.getRawEncoding();
1357   Brackets.End = rAngleLoc.getRawEncoding();
1358   std::copy(typeParams.begin(), typeParams.end(), begin());
1359 }
1360 
1361 
create(ASTContext & ctx,SourceLocation lAngleLoc,ArrayRef<ObjCTypeParamDecl * > typeParams,SourceLocation rAngleLoc)1362 ObjCTypeParamList *ObjCTypeParamList::create(
1363                      ASTContext &ctx,
1364                      SourceLocation lAngleLoc,
1365                      ArrayRef<ObjCTypeParamDecl *> typeParams,
1366                      SourceLocation rAngleLoc) {
1367   void *mem =
1368       ctx.Allocate(totalSizeToAlloc<ObjCTypeParamDecl *>(typeParams.size()),
1369                    llvm::alignOf<ObjCTypeParamList>());
1370   return new (mem) ObjCTypeParamList(lAngleLoc, typeParams, rAngleLoc);
1371 }
1372 
gatherDefaultTypeArgs(SmallVectorImpl<QualType> & typeArgs) const1373 void ObjCTypeParamList::gatherDefaultTypeArgs(
1374        SmallVectorImpl<QualType> &typeArgs) const {
1375   typeArgs.reserve(size());
1376   for (auto typeParam : *this)
1377     typeArgs.push_back(typeParam->getUnderlyingType());
1378 }
1379 
1380 //===----------------------------------------------------------------------===//
1381 // ObjCInterfaceDecl
1382 //===----------------------------------------------------------------------===//
1383 
Create(const ASTContext & C,DeclContext * DC,SourceLocation atLoc,IdentifierInfo * Id,ObjCTypeParamList * typeParamList,ObjCInterfaceDecl * PrevDecl,SourceLocation ClassLoc,bool isInternal)1384 ObjCInterfaceDecl *ObjCInterfaceDecl::Create(const ASTContext &C,
1385                                              DeclContext *DC,
1386                                              SourceLocation atLoc,
1387                                              IdentifierInfo *Id,
1388                                              ObjCTypeParamList *typeParamList,
1389                                              ObjCInterfaceDecl *PrevDecl,
1390                                              SourceLocation ClassLoc,
1391                                              bool isInternal){
1392   ObjCInterfaceDecl *Result = new (C, DC)
1393       ObjCInterfaceDecl(C, DC, atLoc, Id, typeParamList, ClassLoc, PrevDecl,
1394                         isInternal);
1395   Result->Data.setInt(!C.getLangOpts().Modules);
1396   C.getObjCInterfaceType(Result, PrevDecl);
1397   return Result;
1398 }
1399 
CreateDeserialized(const ASTContext & C,unsigned ID)1400 ObjCInterfaceDecl *ObjCInterfaceDecl::CreateDeserialized(const ASTContext &C,
1401                                                          unsigned ID) {
1402   ObjCInterfaceDecl *Result = new (C, ID) ObjCInterfaceDecl(C, nullptr,
1403                                                             SourceLocation(),
1404                                                             nullptr,
1405                                                             nullptr,
1406                                                             SourceLocation(),
1407                                                             nullptr, false);
1408   Result->Data.setInt(!C.getLangOpts().Modules);
1409   return Result;
1410 }
1411 
ObjCInterfaceDecl(const ASTContext & C,DeclContext * DC,SourceLocation AtLoc,IdentifierInfo * Id,ObjCTypeParamList * typeParamList,SourceLocation CLoc,ObjCInterfaceDecl * PrevDecl,bool IsInternal)1412 ObjCInterfaceDecl::ObjCInterfaceDecl(const ASTContext &C, DeclContext *DC,
1413                                      SourceLocation AtLoc, IdentifierInfo *Id,
1414                                      ObjCTypeParamList *typeParamList,
1415                                      SourceLocation CLoc,
1416                                      ObjCInterfaceDecl *PrevDecl,
1417                                      bool IsInternal)
1418     : ObjCContainerDecl(ObjCInterface, DC, Id, CLoc, AtLoc),
1419       redeclarable_base(C), TypeForDecl(nullptr), TypeParamList(nullptr),
1420       Data() {
1421   setPreviousDecl(PrevDecl);
1422 
1423   // Copy the 'data' pointer over.
1424   if (PrevDecl)
1425     Data = PrevDecl->Data;
1426 
1427   setImplicit(IsInternal);
1428 
1429   setTypeParamList(typeParamList);
1430 }
1431 
LoadExternalDefinition() const1432 void ObjCInterfaceDecl::LoadExternalDefinition() const {
1433   assert(data().ExternallyCompleted && "Class is not externally completed");
1434   data().ExternallyCompleted = false;
1435   getASTContext().getExternalSource()->CompleteType(
1436                                         const_cast<ObjCInterfaceDecl *>(this));
1437 }
1438 
setExternallyCompleted()1439 void ObjCInterfaceDecl::setExternallyCompleted() {
1440   assert(getASTContext().getExternalSource() &&
1441          "Class can't be externally completed without an external source");
1442   assert(hasDefinition() &&
1443          "Forward declarations can't be externally completed");
1444   data().ExternallyCompleted = true;
1445 }
1446 
setHasDesignatedInitializers()1447 void ObjCInterfaceDecl::setHasDesignatedInitializers() {
1448   // Check for a complete definition and recover if not so.
1449   if (!isThisDeclarationADefinition())
1450     return;
1451   data().HasDesignatedInitializers = true;
1452 }
1453 
hasDesignatedInitializers() const1454 bool ObjCInterfaceDecl::hasDesignatedInitializers() const {
1455   // Check for a complete definition and recover if not so.
1456   if (!isThisDeclarationADefinition())
1457     return false;
1458   if (data().ExternallyCompleted)
1459     LoadExternalDefinition();
1460 
1461   return data().HasDesignatedInitializers;
1462 }
1463 
1464 StringRef
getObjCRuntimeNameAsString() const1465 ObjCInterfaceDecl::getObjCRuntimeNameAsString() const {
1466   if (ObjCRuntimeNameAttr *ObjCRTName = getAttr<ObjCRuntimeNameAttr>())
1467     return ObjCRTName->getMetadataName();
1468 
1469   return getName();
1470 }
1471 
1472 StringRef
getObjCRuntimeNameAsString() const1473 ObjCImplementationDecl::getObjCRuntimeNameAsString() const {
1474   if (ObjCInterfaceDecl *ID =
1475       const_cast<ObjCImplementationDecl*>(this)->getClassInterface())
1476     return ID->getObjCRuntimeNameAsString();
1477 
1478   return getName();
1479 }
1480 
getImplementation() const1481 ObjCImplementationDecl *ObjCInterfaceDecl::getImplementation() const {
1482   if (const ObjCInterfaceDecl *Def = getDefinition()) {
1483     if (data().ExternallyCompleted)
1484       LoadExternalDefinition();
1485 
1486     return getASTContext().getObjCImplementation(
1487              const_cast<ObjCInterfaceDecl*>(Def));
1488   }
1489 
1490   // FIXME: Should make sure no callers ever do this.
1491   return nullptr;
1492 }
1493 
setImplementation(ObjCImplementationDecl * ImplD)1494 void ObjCInterfaceDecl::setImplementation(ObjCImplementationDecl *ImplD) {
1495   getASTContext().setObjCImplementation(getDefinition(), ImplD);
1496 }
1497 
1498 namespace {
1499   struct SynthesizeIvarChunk {
1500     uint64_t Size;
1501     ObjCIvarDecl *Ivar;
SynthesizeIvarChunk__anon93ac59e80211::SynthesizeIvarChunk1502     SynthesizeIvarChunk(uint64_t size, ObjCIvarDecl *ivar)
1503       : Size(size), Ivar(ivar) {}
1504   };
1505 
operator <(const SynthesizeIvarChunk & LHS,const SynthesizeIvarChunk & RHS)1506   bool operator<(const SynthesizeIvarChunk & LHS,
1507                  const SynthesizeIvarChunk &RHS) {
1508       return LHS.Size < RHS.Size;
1509   }
1510 }
1511 
1512 /// all_declared_ivar_begin - return first ivar declared in this class,
1513 /// its extensions and its implementation. Lazily build the list on first
1514 /// access.
1515 ///
1516 /// Caveat: The list returned by this method reflects the current
1517 /// state of the parser. The cache will be updated for every ivar
1518 /// added by an extension or the implementation when they are
1519 /// encountered.
1520 /// See also ObjCIvarDecl::Create().
all_declared_ivar_begin()1521 ObjCIvarDecl *ObjCInterfaceDecl::all_declared_ivar_begin() {
1522   // FIXME: Should make sure no callers ever do this.
1523   if (!hasDefinition())
1524     return nullptr;
1525 
1526   ObjCIvarDecl *curIvar = nullptr;
1527   if (!data().IvarList) {
1528     if (!ivar_empty()) {
1529       ObjCInterfaceDecl::ivar_iterator I = ivar_begin(), E = ivar_end();
1530       data().IvarList = *I; ++I;
1531       for (curIvar = data().IvarList; I != E; curIvar = *I, ++I)
1532         curIvar->setNextIvar(*I);
1533     }
1534 
1535     for (const auto *Ext : known_extensions()) {
1536       if (!Ext->ivar_empty()) {
1537         ObjCCategoryDecl::ivar_iterator
1538           I = Ext->ivar_begin(),
1539           E = Ext->ivar_end();
1540         if (!data().IvarList) {
1541           data().IvarList = *I; ++I;
1542           curIvar = data().IvarList;
1543         }
1544         for ( ;I != E; curIvar = *I, ++I)
1545           curIvar->setNextIvar(*I);
1546       }
1547     }
1548     data().IvarListMissingImplementation = true;
1549   }
1550 
1551   // cached and complete!
1552   if (!data().IvarListMissingImplementation)
1553       return data().IvarList;
1554 
1555   if (ObjCImplementationDecl *ImplDecl = getImplementation()) {
1556     data().IvarListMissingImplementation = false;
1557     if (!ImplDecl->ivar_empty()) {
1558       SmallVector<SynthesizeIvarChunk, 16> layout;
1559       for (auto *IV : ImplDecl->ivars()) {
1560         if (IV->getSynthesize() && !IV->isInvalidDecl()) {
1561           layout.push_back(SynthesizeIvarChunk(
1562                              IV->getASTContext().getTypeSize(IV->getType()), IV));
1563           continue;
1564         }
1565         if (!data().IvarList)
1566           data().IvarList = IV;
1567         else
1568           curIvar->setNextIvar(IV);
1569         curIvar = IV;
1570       }
1571 
1572       if (!layout.empty()) {
1573         // Order synthesized ivars by their size.
1574         std::stable_sort(layout.begin(), layout.end());
1575         unsigned Ix = 0, EIx = layout.size();
1576         if (!data().IvarList) {
1577           data().IvarList = layout[0].Ivar; Ix++;
1578           curIvar = data().IvarList;
1579         }
1580         for ( ; Ix != EIx; curIvar = layout[Ix].Ivar, Ix++)
1581           curIvar->setNextIvar(layout[Ix].Ivar);
1582       }
1583     }
1584   }
1585   return data().IvarList;
1586 }
1587 
1588 /// FindCategoryDeclaration - Finds category declaration in the list of
1589 /// categories for this class and returns it. Name of the category is passed
1590 /// in 'CategoryId'. If category not found, return 0;
1591 ///
1592 ObjCCategoryDecl *
FindCategoryDeclaration(IdentifierInfo * CategoryId) const1593 ObjCInterfaceDecl::FindCategoryDeclaration(IdentifierInfo *CategoryId) const {
1594   // FIXME: Should make sure no callers ever do this.
1595   if (!hasDefinition())
1596     return nullptr;
1597 
1598   if (data().ExternallyCompleted)
1599     LoadExternalDefinition();
1600 
1601   for (auto *Cat : visible_categories())
1602     if (Cat->getIdentifier() == CategoryId)
1603       return Cat;
1604 
1605   return nullptr;
1606 }
1607 
1608 ObjCMethodDecl *
getCategoryInstanceMethod(Selector Sel) const1609 ObjCInterfaceDecl::getCategoryInstanceMethod(Selector Sel) const {
1610   for (const auto *Cat : visible_categories()) {
1611     if (ObjCCategoryImplDecl *Impl = Cat->getImplementation())
1612       if (ObjCMethodDecl *MD = Impl->getInstanceMethod(Sel))
1613         return MD;
1614   }
1615 
1616   return nullptr;
1617 }
1618 
getCategoryClassMethod(Selector Sel) const1619 ObjCMethodDecl *ObjCInterfaceDecl::getCategoryClassMethod(Selector Sel) const {
1620   for (const auto *Cat : visible_categories()) {
1621     if (ObjCCategoryImplDecl *Impl = Cat->getImplementation())
1622       if (ObjCMethodDecl *MD = Impl->getClassMethod(Sel))
1623         return MD;
1624   }
1625 
1626   return nullptr;
1627 }
1628 
1629 /// ClassImplementsProtocol - Checks that 'lProto' protocol
1630 /// has been implemented in IDecl class, its super class or categories (if
1631 /// lookupCategory is true).
ClassImplementsProtocol(ObjCProtocolDecl * lProto,bool lookupCategory,bool RHSIsQualifiedID)1632 bool ObjCInterfaceDecl::ClassImplementsProtocol(ObjCProtocolDecl *lProto,
1633                                     bool lookupCategory,
1634                                     bool RHSIsQualifiedID) {
1635   if (!hasDefinition())
1636     return false;
1637 
1638   ObjCInterfaceDecl *IDecl = this;
1639   // 1st, look up the class.
1640   for (auto *PI : IDecl->protocols()){
1641     if (getASTContext().ProtocolCompatibleWithProtocol(lProto, PI))
1642       return true;
1643     // This is dubious and is added to be compatible with gcc.  In gcc, it is
1644     // also allowed assigning a protocol-qualified 'id' type to a LHS object
1645     // when protocol in qualified LHS is in list of protocols in the rhs 'id'
1646     // object. This IMO, should be a bug.
1647     // FIXME: Treat this as an extension, and flag this as an error when GCC
1648     // extensions are not enabled.
1649     if (RHSIsQualifiedID &&
1650         getASTContext().ProtocolCompatibleWithProtocol(PI, lProto))
1651       return true;
1652   }
1653 
1654   // 2nd, look up the category.
1655   if (lookupCategory)
1656     for (const auto *Cat : visible_categories()) {
1657       for (auto *PI : Cat->protocols())
1658         if (getASTContext().ProtocolCompatibleWithProtocol(lProto, PI))
1659           return true;
1660     }
1661 
1662   // 3rd, look up the super class(s)
1663   if (IDecl->getSuperClass())
1664     return
1665   IDecl->getSuperClass()->ClassImplementsProtocol(lProto, lookupCategory,
1666                                                   RHSIsQualifiedID);
1667 
1668   return false;
1669 }
1670 
1671 //===----------------------------------------------------------------------===//
1672 // ObjCIvarDecl
1673 //===----------------------------------------------------------------------===//
1674 
anchor()1675 void ObjCIvarDecl::anchor() { }
1676 
Create(ASTContext & C,ObjCContainerDecl * DC,SourceLocation StartLoc,SourceLocation IdLoc,IdentifierInfo * Id,QualType T,TypeSourceInfo * TInfo,AccessControl ac,Expr * BW,bool synthesized)1677 ObjCIvarDecl *ObjCIvarDecl::Create(ASTContext &C, ObjCContainerDecl *DC,
1678                                    SourceLocation StartLoc,
1679                                    SourceLocation IdLoc, IdentifierInfo *Id,
1680                                    QualType T, TypeSourceInfo *TInfo,
1681                                    AccessControl ac, Expr *BW,
1682                                    bool synthesized) {
1683   if (DC) {
1684     // Ivar's can only appear in interfaces, implementations (via synthesized
1685     // properties), and class extensions (via direct declaration, or synthesized
1686     // properties).
1687     //
1688     // FIXME: This should really be asserting this:
1689     //   (isa<ObjCCategoryDecl>(DC) &&
1690     //    cast<ObjCCategoryDecl>(DC)->IsClassExtension()))
1691     // but unfortunately we sometimes place ivars into non-class extension
1692     // categories on error. This breaks an AST invariant, and should not be
1693     // fixed.
1694     assert((isa<ObjCInterfaceDecl>(DC) || isa<ObjCImplementationDecl>(DC) ||
1695             isa<ObjCCategoryDecl>(DC)) &&
1696            "Invalid ivar decl context!");
1697     // Once a new ivar is created in any of class/class-extension/implementation
1698     // decl contexts, the previously built IvarList must be rebuilt.
1699     ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(DC);
1700     if (!ID) {
1701       if (ObjCImplementationDecl *IM = dyn_cast<ObjCImplementationDecl>(DC))
1702         ID = IM->getClassInterface();
1703       else
1704         ID = cast<ObjCCategoryDecl>(DC)->getClassInterface();
1705     }
1706     ID->setIvarList(nullptr);
1707   }
1708 
1709   return new (C, DC) ObjCIvarDecl(DC, StartLoc, IdLoc, Id, T, TInfo, ac, BW,
1710                                   synthesized);
1711 }
1712 
CreateDeserialized(ASTContext & C,unsigned ID)1713 ObjCIvarDecl *ObjCIvarDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
1714   return new (C, ID) ObjCIvarDecl(nullptr, SourceLocation(), SourceLocation(),
1715                                   nullptr, QualType(), nullptr,
1716                                   ObjCIvarDecl::None, nullptr, false);
1717 }
1718 
getContainingInterface() const1719 const ObjCInterfaceDecl *ObjCIvarDecl::getContainingInterface() const {
1720   const ObjCContainerDecl *DC = cast<ObjCContainerDecl>(getDeclContext());
1721 
1722   switch (DC->getKind()) {
1723   default:
1724   case ObjCCategoryImpl:
1725   case ObjCProtocol:
1726     llvm_unreachable("invalid ivar container!");
1727 
1728     // Ivars can only appear in class extension categories.
1729   case ObjCCategory: {
1730     const ObjCCategoryDecl *CD = cast<ObjCCategoryDecl>(DC);
1731     assert(CD->IsClassExtension() && "invalid container for ivar!");
1732     return CD->getClassInterface();
1733   }
1734 
1735   case ObjCImplementation:
1736     return cast<ObjCImplementationDecl>(DC)->getClassInterface();
1737 
1738   case ObjCInterface:
1739     return cast<ObjCInterfaceDecl>(DC);
1740   }
1741 }
1742 
getUsageType(QualType objectType) const1743 QualType ObjCIvarDecl::getUsageType(QualType objectType) const {
1744   return getType().substObjCMemberType(objectType, getDeclContext(),
1745                                        ObjCSubstitutionContext::Property);
1746 }
1747 
1748 //===----------------------------------------------------------------------===//
1749 // ObjCAtDefsFieldDecl
1750 //===----------------------------------------------------------------------===//
1751 
anchor()1752 void ObjCAtDefsFieldDecl::anchor() { }
1753 
1754 ObjCAtDefsFieldDecl
Create(ASTContext & C,DeclContext * DC,SourceLocation StartLoc,SourceLocation IdLoc,IdentifierInfo * Id,QualType T,Expr * BW)1755 *ObjCAtDefsFieldDecl::Create(ASTContext &C, DeclContext *DC,
1756                              SourceLocation StartLoc,  SourceLocation IdLoc,
1757                              IdentifierInfo *Id, QualType T, Expr *BW) {
1758   return new (C, DC) ObjCAtDefsFieldDecl(DC, StartLoc, IdLoc, Id, T, BW);
1759 }
1760 
CreateDeserialized(ASTContext & C,unsigned ID)1761 ObjCAtDefsFieldDecl *ObjCAtDefsFieldDecl::CreateDeserialized(ASTContext &C,
1762                                                              unsigned ID) {
1763   return new (C, ID) ObjCAtDefsFieldDecl(nullptr, SourceLocation(),
1764                                          SourceLocation(), nullptr, QualType(),
1765                                          nullptr);
1766 }
1767 
1768 //===----------------------------------------------------------------------===//
1769 // ObjCProtocolDecl
1770 //===----------------------------------------------------------------------===//
1771 
anchor()1772 void ObjCProtocolDecl::anchor() { }
1773 
ObjCProtocolDecl(ASTContext & C,DeclContext * DC,IdentifierInfo * Id,SourceLocation nameLoc,SourceLocation atStartLoc,ObjCProtocolDecl * PrevDecl)1774 ObjCProtocolDecl::ObjCProtocolDecl(ASTContext &C, DeclContext *DC,
1775                                    IdentifierInfo *Id, SourceLocation nameLoc,
1776                                    SourceLocation atStartLoc,
1777                                    ObjCProtocolDecl *PrevDecl)
1778     : ObjCContainerDecl(ObjCProtocol, DC, Id, nameLoc, atStartLoc),
1779       redeclarable_base(C), Data() {
1780   setPreviousDecl(PrevDecl);
1781   if (PrevDecl)
1782     Data = PrevDecl->Data;
1783 }
1784 
Create(ASTContext & C,DeclContext * DC,IdentifierInfo * Id,SourceLocation nameLoc,SourceLocation atStartLoc,ObjCProtocolDecl * PrevDecl)1785 ObjCProtocolDecl *ObjCProtocolDecl::Create(ASTContext &C, DeclContext *DC,
1786                                            IdentifierInfo *Id,
1787                                            SourceLocation nameLoc,
1788                                            SourceLocation atStartLoc,
1789                                            ObjCProtocolDecl *PrevDecl) {
1790   ObjCProtocolDecl *Result =
1791       new (C, DC) ObjCProtocolDecl(C, DC, Id, nameLoc, atStartLoc, PrevDecl);
1792   Result->Data.setInt(!C.getLangOpts().Modules);
1793   return Result;
1794 }
1795 
CreateDeserialized(ASTContext & C,unsigned ID)1796 ObjCProtocolDecl *ObjCProtocolDecl::CreateDeserialized(ASTContext &C,
1797                                                        unsigned ID) {
1798   ObjCProtocolDecl *Result =
1799       new (C, ID) ObjCProtocolDecl(C, nullptr, nullptr, SourceLocation(),
1800                                    SourceLocation(), nullptr);
1801   Result->Data.setInt(!C.getLangOpts().Modules);
1802   return Result;
1803 }
1804 
lookupProtocolNamed(IdentifierInfo * Name)1805 ObjCProtocolDecl *ObjCProtocolDecl::lookupProtocolNamed(IdentifierInfo *Name) {
1806   ObjCProtocolDecl *PDecl = this;
1807 
1808   if (Name == getIdentifier())
1809     return PDecl;
1810 
1811   for (auto *I : protocols())
1812     if ((PDecl = I->lookupProtocolNamed(Name)))
1813       return PDecl;
1814 
1815   return nullptr;
1816 }
1817 
1818 // lookupMethod - Lookup a instance/class method in the protocol and protocols
1819 // it inherited.
lookupMethod(Selector Sel,bool isInstance) const1820 ObjCMethodDecl *ObjCProtocolDecl::lookupMethod(Selector Sel,
1821                                                bool isInstance) const {
1822   ObjCMethodDecl *MethodDecl = nullptr;
1823 
1824   // If there is no definition or the definition is hidden, we don't find
1825   // anything.
1826   const ObjCProtocolDecl *Def = getDefinition();
1827   if (!Def || Def->isHidden())
1828     return nullptr;
1829 
1830   if ((MethodDecl = getMethod(Sel, isInstance)))
1831     return MethodDecl;
1832 
1833   for (const auto *I : protocols())
1834     if ((MethodDecl = I->lookupMethod(Sel, isInstance)))
1835       return MethodDecl;
1836   return nullptr;
1837 }
1838 
allocateDefinitionData()1839 void ObjCProtocolDecl::allocateDefinitionData() {
1840   assert(!Data.getPointer() && "Protocol already has a definition!");
1841   Data.setPointer(new (getASTContext()) DefinitionData);
1842   Data.getPointer()->Definition = this;
1843 }
1844 
startDefinition()1845 void ObjCProtocolDecl::startDefinition() {
1846   allocateDefinitionData();
1847 
1848   // Update all of the declarations with a pointer to the definition.
1849   for (auto RD : redecls())
1850     RD->Data = this->Data;
1851 }
1852 
collectPropertiesToImplement(PropertyMap & PM,PropertyDeclOrder & PO) const1853 void ObjCProtocolDecl::collectPropertiesToImplement(PropertyMap &PM,
1854                                                     PropertyDeclOrder &PO) const {
1855 
1856   if (const ObjCProtocolDecl *PDecl = getDefinition()) {
1857     for (auto *Prop : PDecl->properties()) {
1858       // Insert into PM if not there already.
1859       PM.insert(std::make_pair(
1860           std::make_pair(Prop->getIdentifier(), Prop->isClassProperty()),
1861           Prop));
1862       PO.push_back(Prop);
1863     }
1864     // Scan through protocol's protocols.
1865     for (const auto *PI : PDecl->protocols())
1866       PI->collectPropertiesToImplement(PM, PO);
1867   }
1868 }
1869 
1870 
collectInheritedProtocolProperties(const ObjCPropertyDecl * Property,ProtocolPropertyMap & PM) const1871 void ObjCProtocolDecl::collectInheritedProtocolProperties(
1872                                                 const ObjCPropertyDecl *Property,
1873                                                 ProtocolPropertyMap &PM) const {
1874   if (const ObjCProtocolDecl *PDecl = getDefinition()) {
1875     bool MatchFound = false;
1876     for (auto *Prop : PDecl->properties()) {
1877       if (Prop == Property)
1878         continue;
1879       if (Prop->getIdentifier() == Property->getIdentifier()) {
1880         PM[PDecl] = Prop;
1881         MatchFound = true;
1882         break;
1883       }
1884     }
1885     // Scan through protocol's protocols which did not have a matching property.
1886     if (!MatchFound)
1887       for (const auto *PI : PDecl->protocols())
1888         PI->collectInheritedProtocolProperties(Property, PM);
1889   }
1890 }
1891 
1892 StringRef
getObjCRuntimeNameAsString() const1893 ObjCProtocolDecl::getObjCRuntimeNameAsString() const {
1894   if (ObjCRuntimeNameAttr *ObjCRTName = getAttr<ObjCRuntimeNameAttr>())
1895     return ObjCRTName->getMetadataName();
1896 
1897   return getName();
1898 }
1899 
1900 //===----------------------------------------------------------------------===//
1901 // ObjCCategoryDecl
1902 //===----------------------------------------------------------------------===//
1903 
anchor()1904 void ObjCCategoryDecl::anchor() { }
1905 
ObjCCategoryDecl(DeclContext * DC,SourceLocation AtLoc,SourceLocation ClassNameLoc,SourceLocation CategoryNameLoc,IdentifierInfo * Id,ObjCInterfaceDecl * IDecl,ObjCTypeParamList * typeParamList,SourceLocation IvarLBraceLoc,SourceLocation IvarRBraceLoc)1906 ObjCCategoryDecl::ObjCCategoryDecl(DeclContext *DC, SourceLocation AtLoc,
1907                                    SourceLocation ClassNameLoc,
1908                                    SourceLocation CategoryNameLoc,
1909                                    IdentifierInfo *Id, ObjCInterfaceDecl *IDecl,
1910                                    ObjCTypeParamList *typeParamList,
1911                                    SourceLocation IvarLBraceLoc,
1912                                    SourceLocation IvarRBraceLoc)
1913   : ObjCContainerDecl(ObjCCategory, DC, Id, ClassNameLoc, AtLoc),
1914     ClassInterface(IDecl), TypeParamList(nullptr),
1915     NextClassCategory(nullptr), CategoryNameLoc(CategoryNameLoc),
1916     IvarLBraceLoc(IvarLBraceLoc), IvarRBraceLoc(IvarRBraceLoc)
1917 {
1918   setTypeParamList(typeParamList);
1919 }
1920 
Create(ASTContext & C,DeclContext * DC,SourceLocation AtLoc,SourceLocation ClassNameLoc,SourceLocation CategoryNameLoc,IdentifierInfo * Id,ObjCInterfaceDecl * IDecl,ObjCTypeParamList * typeParamList,SourceLocation IvarLBraceLoc,SourceLocation IvarRBraceLoc)1921 ObjCCategoryDecl *ObjCCategoryDecl::Create(ASTContext &C, DeclContext *DC,
1922                                            SourceLocation AtLoc,
1923                                            SourceLocation ClassNameLoc,
1924                                            SourceLocation CategoryNameLoc,
1925                                            IdentifierInfo *Id,
1926                                            ObjCInterfaceDecl *IDecl,
1927                                            ObjCTypeParamList *typeParamList,
1928                                            SourceLocation IvarLBraceLoc,
1929                                            SourceLocation IvarRBraceLoc) {
1930   ObjCCategoryDecl *CatDecl =
1931       new (C, DC) ObjCCategoryDecl(DC, AtLoc, ClassNameLoc, CategoryNameLoc, Id,
1932                                    IDecl, typeParamList, IvarLBraceLoc,
1933                                    IvarRBraceLoc);
1934   if (IDecl) {
1935     // Link this category into its class's category list.
1936     CatDecl->NextClassCategory = IDecl->getCategoryListRaw();
1937     if (IDecl->hasDefinition()) {
1938       IDecl->setCategoryListRaw(CatDecl);
1939       if (ASTMutationListener *L = C.getASTMutationListener())
1940         L->AddedObjCCategoryToInterface(CatDecl, IDecl);
1941     }
1942   }
1943 
1944   return CatDecl;
1945 }
1946 
CreateDeserialized(ASTContext & C,unsigned ID)1947 ObjCCategoryDecl *ObjCCategoryDecl::CreateDeserialized(ASTContext &C,
1948                                                        unsigned ID) {
1949   return new (C, ID) ObjCCategoryDecl(nullptr, SourceLocation(),
1950                                       SourceLocation(), SourceLocation(),
1951                                       nullptr, nullptr, nullptr);
1952 }
1953 
getImplementation() const1954 ObjCCategoryImplDecl *ObjCCategoryDecl::getImplementation() const {
1955   return getASTContext().getObjCImplementation(
1956                                            const_cast<ObjCCategoryDecl*>(this));
1957 }
1958 
setImplementation(ObjCCategoryImplDecl * ImplD)1959 void ObjCCategoryDecl::setImplementation(ObjCCategoryImplDecl *ImplD) {
1960   getASTContext().setObjCImplementation(this, ImplD);
1961 }
1962 
setTypeParamList(ObjCTypeParamList * TPL)1963 void ObjCCategoryDecl::setTypeParamList(ObjCTypeParamList *TPL) {
1964   TypeParamList = TPL;
1965   if (!TPL)
1966     return;
1967   // Set the declaration context of each of the type parameters.
1968   for (auto typeParam : *TypeParamList)
1969     typeParam->setDeclContext(this);
1970 }
1971 
1972 
1973 //===----------------------------------------------------------------------===//
1974 // ObjCCategoryImplDecl
1975 //===----------------------------------------------------------------------===//
1976 
anchor()1977 void ObjCCategoryImplDecl::anchor() { }
1978 
1979 ObjCCategoryImplDecl *
Create(ASTContext & C,DeclContext * DC,IdentifierInfo * Id,ObjCInterfaceDecl * ClassInterface,SourceLocation nameLoc,SourceLocation atStartLoc,SourceLocation CategoryNameLoc)1980 ObjCCategoryImplDecl::Create(ASTContext &C, DeclContext *DC,
1981                              IdentifierInfo *Id,
1982                              ObjCInterfaceDecl *ClassInterface,
1983                              SourceLocation nameLoc,
1984                              SourceLocation atStartLoc,
1985                              SourceLocation CategoryNameLoc) {
1986   if (ClassInterface && ClassInterface->hasDefinition())
1987     ClassInterface = ClassInterface->getDefinition();
1988   return new (C, DC) ObjCCategoryImplDecl(DC, Id, ClassInterface, nameLoc,
1989                                           atStartLoc, CategoryNameLoc);
1990 }
1991 
CreateDeserialized(ASTContext & C,unsigned ID)1992 ObjCCategoryImplDecl *ObjCCategoryImplDecl::CreateDeserialized(ASTContext &C,
1993                                                                unsigned ID) {
1994   return new (C, ID) ObjCCategoryImplDecl(nullptr, nullptr, nullptr,
1995                                           SourceLocation(), SourceLocation(),
1996                                           SourceLocation());
1997 }
1998 
getCategoryDecl() const1999 ObjCCategoryDecl *ObjCCategoryImplDecl::getCategoryDecl() const {
2000   // The class interface might be NULL if we are working with invalid code.
2001   if (const ObjCInterfaceDecl *ID = getClassInterface())
2002     return ID->FindCategoryDeclaration(getIdentifier());
2003   return nullptr;
2004 }
2005 
2006 
anchor()2007 void ObjCImplDecl::anchor() { }
2008 
addPropertyImplementation(ObjCPropertyImplDecl * property)2009 void ObjCImplDecl::addPropertyImplementation(ObjCPropertyImplDecl *property) {
2010   // FIXME: The context should be correct before we get here.
2011   property->setLexicalDeclContext(this);
2012   addDecl(property);
2013 }
2014 
setClassInterface(ObjCInterfaceDecl * IFace)2015 void ObjCImplDecl::setClassInterface(ObjCInterfaceDecl *IFace) {
2016   ASTContext &Ctx = getASTContext();
2017 
2018   if (ObjCImplementationDecl *ImplD
2019         = dyn_cast_or_null<ObjCImplementationDecl>(this)) {
2020     if (IFace)
2021       Ctx.setObjCImplementation(IFace, ImplD);
2022 
2023   } else if (ObjCCategoryImplDecl *ImplD =
2024              dyn_cast_or_null<ObjCCategoryImplDecl>(this)) {
2025     if (ObjCCategoryDecl *CD = IFace->FindCategoryDeclaration(getIdentifier()))
2026       Ctx.setObjCImplementation(CD, ImplD);
2027   }
2028 
2029   ClassInterface = IFace;
2030 }
2031 
2032 /// FindPropertyImplIvarDecl - This method lookup the ivar in the list of
2033 /// properties implemented in this \@implementation block and returns
2034 /// the implemented property that uses it.
2035 ///
2036 ObjCPropertyImplDecl *ObjCImplDecl::
FindPropertyImplIvarDecl(IdentifierInfo * ivarId) const2037 FindPropertyImplIvarDecl(IdentifierInfo *ivarId) const {
2038   for (auto *PID : property_impls())
2039     if (PID->getPropertyIvarDecl() &&
2040         PID->getPropertyIvarDecl()->getIdentifier() == ivarId)
2041       return PID;
2042   return nullptr;
2043 }
2044 
2045 /// FindPropertyImplDecl - This method looks up a previous ObjCPropertyImplDecl
2046 /// added to the list of those properties \@synthesized/\@dynamic in this
2047 /// category \@implementation block.
2048 ///
2049 ObjCPropertyImplDecl *ObjCImplDecl::
FindPropertyImplDecl(IdentifierInfo * Id,ObjCPropertyQueryKind QueryKind) const2050 FindPropertyImplDecl(IdentifierInfo *Id,
2051                      ObjCPropertyQueryKind QueryKind) const {
2052   ObjCPropertyImplDecl *ClassPropImpl = nullptr;
2053   for (auto *PID : property_impls())
2054     // If queryKind is unknown, we return the instance property if one
2055     // exists; otherwise we return the class property.
2056     if (PID->getPropertyDecl()->getIdentifier() == Id) {
2057       if ((QueryKind == ObjCPropertyQueryKind::OBJC_PR_query_unknown &&
2058            !PID->getPropertyDecl()->isClassProperty()) ||
2059           (QueryKind == ObjCPropertyQueryKind::OBJC_PR_query_class &&
2060            PID->getPropertyDecl()->isClassProperty()) ||
2061           (QueryKind == ObjCPropertyQueryKind::OBJC_PR_query_instance &&
2062            !PID->getPropertyDecl()->isClassProperty()))
2063         return PID;
2064 
2065       if (PID->getPropertyDecl()->isClassProperty())
2066         ClassPropImpl = PID;
2067     }
2068 
2069   if (QueryKind == ObjCPropertyQueryKind::OBJC_PR_query_unknown)
2070     // We can't find the instance property, return the class property.
2071     return ClassPropImpl;
2072 
2073   return nullptr;
2074 }
2075 
operator <<(raw_ostream & OS,const ObjCCategoryImplDecl & CID)2076 raw_ostream &clang::operator<<(raw_ostream &OS,
2077                                const ObjCCategoryImplDecl &CID) {
2078   OS << CID.getName();
2079   return OS;
2080 }
2081 
2082 //===----------------------------------------------------------------------===//
2083 // ObjCImplementationDecl
2084 //===----------------------------------------------------------------------===//
2085 
anchor()2086 void ObjCImplementationDecl::anchor() { }
2087 
2088 ObjCImplementationDecl *
Create(ASTContext & C,DeclContext * DC,ObjCInterfaceDecl * ClassInterface,ObjCInterfaceDecl * SuperDecl,SourceLocation nameLoc,SourceLocation atStartLoc,SourceLocation superLoc,SourceLocation IvarLBraceLoc,SourceLocation IvarRBraceLoc)2089 ObjCImplementationDecl::Create(ASTContext &C, DeclContext *DC,
2090                                ObjCInterfaceDecl *ClassInterface,
2091                                ObjCInterfaceDecl *SuperDecl,
2092                                SourceLocation nameLoc,
2093                                SourceLocation atStartLoc,
2094                                SourceLocation superLoc,
2095                                SourceLocation IvarLBraceLoc,
2096                                SourceLocation IvarRBraceLoc) {
2097   if (ClassInterface && ClassInterface->hasDefinition())
2098     ClassInterface = ClassInterface->getDefinition();
2099   return new (C, DC) ObjCImplementationDecl(DC, ClassInterface, SuperDecl,
2100                                             nameLoc, atStartLoc, superLoc,
2101                                             IvarLBraceLoc, IvarRBraceLoc);
2102 }
2103 
2104 ObjCImplementationDecl *
CreateDeserialized(ASTContext & C,unsigned ID)2105 ObjCImplementationDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2106   return new (C, ID) ObjCImplementationDecl(nullptr, nullptr, nullptr,
2107                                             SourceLocation(), SourceLocation());
2108 }
2109 
setIvarInitializers(ASTContext & C,CXXCtorInitializer ** initializers,unsigned numInitializers)2110 void ObjCImplementationDecl::setIvarInitializers(ASTContext &C,
2111                                              CXXCtorInitializer ** initializers,
2112                                                  unsigned numInitializers) {
2113   if (numInitializers > 0) {
2114     NumIvarInitializers = numInitializers;
2115     CXXCtorInitializer **ivarInitializers =
2116     new (C) CXXCtorInitializer*[NumIvarInitializers];
2117     memcpy(ivarInitializers, initializers,
2118            numInitializers * sizeof(CXXCtorInitializer*));
2119     IvarInitializers = ivarInitializers;
2120   }
2121 }
2122 
2123 ObjCImplementationDecl::init_const_iterator
init_begin() const2124 ObjCImplementationDecl::init_begin() const {
2125   return IvarInitializers.get(getASTContext().getExternalSource());
2126 }
2127 
operator <<(raw_ostream & OS,const ObjCImplementationDecl & ID)2128 raw_ostream &clang::operator<<(raw_ostream &OS,
2129                                const ObjCImplementationDecl &ID) {
2130   OS << ID.getName();
2131   return OS;
2132 }
2133 
2134 //===----------------------------------------------------------------------===//
2135 // ObjCCompatibleAliasDecl
2136 //===----------------------------------------------------------------------===//
2137 
anchor()2138 void ObjCCompatibleAliasDecl::anchor() { }
2139 
2140 ObjCCompatibleAliasDecl *
Create(ASTContext & C,DeclContext * DC,SourceLocation L,IdentifierInfo * Id,ObjCInterfaceDecl * AliasedClass)2141 ObjCCompatibleAliasDecl::Create(ASTContext &C, DeclContext *DC,
2142                                 SourceLocation L,
2143                                 IdentifierInfo *Id,
2144                                 ObjCInterfaceDecl* AliasedClass) {
2145   return new (C, DC) ObjCCompatibleAliasDecl(DC, L, Id, AliasedClass);
2146 }
2147 
2148 ObjCCompatibleAliasDecl *
CreateDeserialized(ASTContext & C,unsigned ID)2149 ObjCCompatibleAliasDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2150   return new (C, ID) ObjCCompatibleAliasDecl(nullptr, SourceLocation(),
2151                                              nullptr, nullptr);
2152 }
2153 
2154 //===----------------------------------------------------------------------===//
2155 // ObjCPropertyDecl
2156 //===----------------------------------------------------------------------===//
2157 
anchor()2158 void ObjCPropertyDecl::anchor() { }
2159 
Create(ASTContext & C,DeclContext * DC,SourceLocation L,IdentifierInfo * Id,SourceLocation AtLoc,SourceLocation LParenLoc,QualType T,TypeSourceInfo * TSI,PropertyControl propControl)2160 ObjCPropertyDecl *ObjCPropertyDecl::Create(ASTContext &C, DeclContext *DC,
2161                                            SourceLocation L,
2162                                            IdentifierInfo *Id,
2163                                            SourceLocation AtLoc,
2164                                            SourceLocation LParenLoc,
2165                                            QualType T,
2166                                            TypeSourceInfo *TSI,
2167                                            PropertyControl propControl) {
2168   return new (C, DC) ObjCPropertyDecl(DC, L, Id, AtLoc, LParenLoc, T, TSI,
2169                                       propControl);
2170 }
2171 
CreateDeserialized(ASTContext & C,unsigned ID)2172 ObjCPropertyDecl *ObjCPropertyDecl::CreateDeserialized(ASTContext &C,
2173                                                        unsigned ID) {
2174   return new (C, ID) ObjCPropertyDecl(nullptr, SourceLocation(), nullptr,
2175                                       SourceLocation(), SourceLocation(),
2176                                       QualType(), nullptr, None);
2177 }
2178 
getUsageType(QualType objectType) const2179 QualType ObjCPropertyDecl::getUsageType(QualType objectType) const {
2180   return DeclType.substObjCMemberType(objectType, getDeclContext(),
2181                                       ObjCSubstitutionContext::Property);
2182 }
2183 
2184 //===----------------------------------------------------------------------===//
2185 // ObjCPropertyImplDecl
2186 //===----------------------------------------------------------------------===//
2187 
Create(ASTContext & C,DeclContext * DC,SourceLocation atLoc,SourceLocation L,ObjCPropertyDecl * property,Kind PK,ObjCIvarDecl * ivar,SourceLocation ivarLoc)2188 ObjCPropertyImplDecl *ObjCPropertyImplDecl::Create(ASTContext &C,
2189                                                    DeclContext *DC,
2190                                                    SourceLocation atLoc,
2191                                                    SourceLocation L,
2192                                                    ObjCPropertyDecl *property,
2193                                                    Kind PK,
2194                                                    ObjCIvarDecl *ivar,
2195                                                    SourceLocation ivarLoc) {
2196   return new (C, DC) ObjCPropertyImplDecl(DC, atLoc, L, property, PK, ivar,
2197                                           ivarLoc);
2198 }
2199 
CreateDeserialized(ASTContext & C,unsigned ID)2200 ObjCPropertyImplDecl *ObjCPropertyImplDecl::CreateDeserialized(ASTContext &C,
2201                                                                unsigned ID) {
2202   return new (C, ID) ObjCPropertyImplDecl(nullptr, SourceLocation(),
2203                                           SourceLocation(), nullptr, Dynamic,
2204                                           nullptr, SourceLocation());
2205 }
2206 
getSourceRange() const2207 SourceRange ObjCPropertyImplDecl::getSourceRange() const {
2208   SourceLocation EndLoc = getLocation();
2209   if (IvarLoc.isValid())
2210     EndLoc = IvarLoc;
2211 
2212   return SourceRange(AtLoc, EndLoc);
2213 }
2214