clang-1/lib/Sema/SemaDeclObjC.cpp

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//===--- SemaDeclObjC.cpp - Semantic Analysis for ObjC Declarations -------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements semantic analysis for Objective C declarations.
//
//===----------------------------------------------------------------------===//
#include "Sema.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/DeclObjC.h"
#include "clang/Basic/Diagnostic.h"
#include "clang/Parse/DeclSpec.h"
using namespace clang;
/// ObjCActOnStartOfMethodDef - This routine sets up parameters; invisible
/// and user declared, in the method definition's AST.
void Sema::ObjCActOnStartOfMethodDef(Scope *FnBodyScope, DeclTy *D) {
assert(getCurMethodDecl() == 0 && "Method parsing confused");
ObjCMethodDecl *MDecl = dyn_cast_or_null<ObjCMethodDecl>((Decl *)D);
// If we don't have a valid method decl, simply return.
if (!MDecl)
return;
// Allow the rest of sema to find private method decl implementations.
if (MDecl->isInstance())
AddInstanceMethodToGlobalPool(MDecl);
else
AddFactoryMethodToGlobalPool(MDecl);
// Allow all of Sema to see that we are entering a method definition.
PushDeclContext(FnBodyScope, MDecl);
// Create Decl objects for each parameter, entrring them in the scope for
// binding to their use.
// Insert the invisible arguments, self and _cmd!
MDecl->createImplicitParams(Context, MDecl->getClassInterface());
PushOnScopeChains(MDecl->getSelfDecl(), FnBodyScope);
PushOnScopeChains(MDecl->getCmdDecl(), FnBodyScope);
// Introduce all of the other parameters into this scope.
for (unsigned i = 0, e = MDecl->getNumParams(); i != e; ++i) {
ParmVarDecl *PDecl = MDecl->getParamDecl(i);
IdentifierInfo *II = PDecl->getIdentifier();
if (II)
PushOnScopeChains(PDecl, FnBodyScope);
}
}
Sema::DeclTy *Sema::
ActOnStartClassInterface(SourceLocation AtInterfaceLoc,
IdentifierInfo *ClassName, SourceLocation ClassLoc,
IdentifierInfo *SuperName, SourceLocation SuperLoc,
DeclTy * const *ProtoRefs, unsigned NumProtoRefs,
SourceLocation EndProtoLoc, AttributeList *AttrList) {
assert(ClassName && "Missing class identifier");
// Check for another declaration kind with the same name.
Decl *PrevDecl = LookupDecl(ClassName, Decl::IDNS_Ordinary, TUScope);
if (PrevDecl && PrevDecl->isTemplateParameter()) {
// Maybe we will complain about the shadowed template parameter.
DiagnoseTemplateParameterShadow(ClassLoc, PrevDecl);
// Just pretend that we didn't see the previous declaration.
PrevDecl = 0;
}
if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) {
Diag(ClassLoc, diag::err_redefinition_different_kind) << ClassName;
Diag(PrevDecl->getLocation(), diag::note_previous_definition);
}
ObjCInterfaceDecl* IDecl = dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl);
if (IDecl) {
// Class already seen. Is it a forward declaration?
if (!IDecl->isForwardDecl()) {
Diag(AtInterfaceLoc, diag::err_duplicate_class_def)<<IDecl->getDeclName();
Diag(IDecl->getLocation(), diag::note_previous_definition);
// Return the previous class interface.
// FIXME: don't leak the objects passed in!
return IDecl;
} else {
IDecl->setLocation(AtInterfaceLoc);
IDecl->setForwardDecl(false);
}
} else {
IDecl = ObjCInterfaceDecl::Create(Context, AtInterfaceLoc,
ClassName, ClassLoc);
if (AttrList)
ProcessDeclAttributeList(IDecl, AttrList);
ObjCInterfaceDecls[ClassName] = IDecl;
// Remember that this needs to be removed when the scope is popped.
TUScope->AddDecl(IDecl);
}
if (SuperName) {
ObjCInterfaceDecl* SuperClassEntry = 0;
// Check if a different kind of symbol declared in this scope.
PrevDecl = LookupDecl(SuperName, Decl::IDNS_Ordinary, TUScope);
if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) {
Diag(SuperLoc, diag::err_redefinition_different_kind) << SuperName;
Diag(PrevDecl->getLocation(), diag::note_previous_definition);
}
else {
// Check that super class is previously defined
SuperClassEntry = dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl);
if (!SuperClassEntry)
Diag(SuperLoc, diag::err_undef_superclass)
<< SuperName << ClassName << SourceRange(AtInterfaceLoc, ClassLoc);
else if (SuperClassEntry->isForwardDecl())
Diag(SuperLoc, diag::err_undef_superclass)
<< SuperClassEntry->getDeclName() << ClassName
<< SourceRange(AtInterfaceLoc, ClassLoc);
}
IDecl->setSuperClass(SuperClassEntry);
IDecl->setSuperClassLoc(SuperLoc);
IDecl->setLocEnd(SuperLoc);
} else { // we have a root class.
IDecl->setLocEnd(ClassLoc);
}
/// Check then save referenced protocols.
if (NumProtoRefs) {
IDecl->addReferencedProtocols((ObjCProtocolDecl**)ProtoRefs, NumProtoRefs);
IDecl->setLocEnd(EndProtoLoc);
}
CheckObjCDeclScope(IDecl);
return IDecl;
}
/// ActOnCompatiblityAlias - this action is called after complete parsing of
/// @compatibility_alias declaration. It sets up the alias relationships.
Sema::DeclTy *Sema::ActOnCompatiblityAlias(SourceLocation AtLoc,
IdentifierInfo *AliasName,
SourceLocation AliasLocation,
IdentifierInfo *ClassName,
SourceLocation ClassLocation) {
// Look for previous declaration of alias name
Decl *ADecl = LookupDecl(AliasName, Decl::IDNS_Ordinary, TUScope);
if (ADecl) {
if (isa<ObjCCompatibleAliasDecl>(ADecl))
Diag(AliasLocation, diag::warn_previous_alias_decl);
else
Diag(AliasLocation, diag::err_conflicting_aliasing_type) << AliasName;
Diag(ADecl->getLocation(), diag::note_previous_declaration);
return 0;
}
// Check for class declaration
Decl *CDeclU = LookupDecl(ClassName, Decl::IDNS_Ordinary, TUScope);
ObjCInterfaceDecl *CDecl = dyn_cast_or_null<ObjCInterfaceDecl>(CDeclU);
if (CDecl == 0) {
Diag(ClassLocation, diag::warn_undef_interface) << ClassName;
if (CDeclU)
Diag(CDeclU->getLocation(), diag::note_previous_declaration);
return 0;
}
// Everything checked out, instantiate a new alias declaration AST.
ObjCCompatibleAliasDecl *AliasDecl =
ObjCCompatibleAliasDecl::Create(Context, AtLoc, AliasName, CDecl);
ObjCAliasDecls[AliasName] = AliasDecl;
if (!CheckObjCDeclScope(AliasDecl))
TUScope->AddDecl(AliasDecl);
return AliasDecl;
}
Sema::DeclTy *
Sema::ActOnStartProtocolInterface(SourceLocation AtProtoInterfaceLoc,
IdentifierInfo *ProtocolName,
SourceLocation ProtocolLoc,
DeclTy * const *ProtoRefs,
unsigned NumProtoRefs,
SourceLocation EndProtoLoc,
AttributeList *AttrList) {
// FIXME: Deal with AttrList.
assert(ProtocolName && "Missing protocol identifier");
ObjCProtocolDecl *PDecl = ObjCProtocols[ProtocolName];
if (PDecl) {
// Protocol already seen. Better be a forward protocol declaration
if (!PDecl->isForwardDecl()) {
Diag(ProtocolLoc, diag::err_duplicate_protocol_def) << ProtocolName;
Diag(PDecl->getLocation(), diag::note_previous_definition);
// Just return the protocol we already had.
// FIXME: don't leak the objects passed in!
return PDecl;
}
// Make sure the cached decl gets a valid start location.
PDecl->setLocation(AtProtoInterfaceLoc);
PDecl->setForwardDecl(false);
} else {
PDecl = ObjCProtocolDecl::Create(Context, AtProtoInterfaceLoc,ProtocolName);
PDecl->setForwardDecl(false);
ObjCProtocols[ProtocolName] = PDecl;
}
if (AttrList)
ProcessDeclAttributeList(PDecl, AttrList);
if (NumProtoRefs) {
/// Check then save referenced protocols.
PDecl->addReferencedProtocols((ObjCProtocolDecl**)ProtoRefs, NumProtoRefs);
PDecl->setLocEnd(EndProtoLoc);
}
CheckObjCDeclScope(PDecl);
return PDecl;
}
/// FindProtocolDeclaration - This routine looks up protocols and
/// issues an error if they are not declared. It returns list of
/// protocol declarations in its 'Protocols' argument.
void
Sema::FindProtocolDeclaration(bool WarnOnDeclarations,
const IdentifierLocPair *ProtocolId,
unsigned NumProtocols,
llvm::SmallVectorImpl<DeclTy*> &Protocols) {
for (unsigned i = 0; i != NumProtocols; ++i) {
ObjCProtocolDecl *PDecl = ObjCProtocols[ProtocolId[i].first];
if (!PDecl) {
Diag(ProtocolId[i].second, diag::err_undeclared_protocol)
<< ProtocolId[i].first;
continue;
}
for (const Attr *attr = PDecl->getAttrs(); attr; attr = attr->getNext()) {
if (attr->hasKind(Attr::Unavailable))
Diag(ProtocolId[i].second, diag::warn_unavailable) <<
PDecl->getDeclName();
if (attr->hasKind(Attr::Deprecated))
Diag(ProtocolId[i].second, diag::warn_deprecated) <<
PDecl->getDeclName();
}
// If this is a forward declaration and we are supposed to warn in this
// case, do it.
if (WarnOnDeclarations && PDecl->isForwardDecl())
Diag(ProtocolId[i].second, diag::warn_undef_protocolref)
<< ProtocolId[i].first;
Protocols.push_back(PDecl);
}
}
/// DiagnosePropertyMismatch - Compares two properties for their
/// attributes and types and warns on a variety of inconsistencies.
///
void
Sema::DiagnosePropertyMismatch(ObjCPropertyDecl *Property,
ObjCPropertyDecl *SuperProperty,
const IdentifierInfo *inheritedName) {
ObjCPropertyDecl::PropertyAttributeKind CAttr =
Property->getPropertyAttributes();
ObjCPropertyDecl::PropertyAttributeKind SAttr =
SuperProperty->getPropertyAttributes();
if ((CAttr & ObjCPropertyDecl::OBJC_PR_readonly)
&& (SAttr & ObjCPropertyDecl::OBJC_PR_readwrite))
Diag(Property->getLocation(), diag::warn_readonly_property)
<< Property->getDeclName() << inheritedName;
if ((CAttr & ObjCPropertyDecl::OBJC_PR_copy)
!= (SAttr & ObjCPropertyDecl::OBJC_PR_copy))
Diag(Property->getLocation(), diag::warn_property_attribute)
<< Property->getDeclName() << "copy" << inheritedName;
else if ((CAttr & ObjCPropertyDecl::OBJC_PR_retain)
!= (SAttr & ObjCPropertyDecl::OBJC_PR_retain))
Diag(Property->getLocation(), diag::warn_property_attribute)
<< Property->getDeclName() << "retain" << inheritedName;
if ((CAttr & ObjCPropertyDecl::OBJC_PR_nonatomic)
!= (SAttr & ObjCPropertyDecl::OBJC_PR_nonatomic))
Diag(Property->getLocation(), diag::warn_property_attribute)
<< Property->getDeclName() << "atomic" << inheritedName;
if (Property->getSetterName() != SuperProperty->getSetterName())
Diag(Property->getLocation(), diag::warn_property_attribute)
<< Property->getDeclName() << "setter" << inheritedName;
if (Property->getGetterName() != SuperProperty->getGetterName())
Diag(Property->getLocation(), diag::warn_property_attribute)
<< Property->getDeclName() << "getter" << inheritedName;
if (Context.getCanonicalType(Property->getType()) !=
Context.getCanonicalType(SuperProperty->getType()))
Diag(Property->getLocation(), diag::warn_property_type)
<< Property->getType() << inheritedName;
}
/// ComparePropertiesInBaseAndSuper - This routine compares property
/// declarations in base and its super class, if any, and issues
/// diagnostics in a variety of inconsistant situations.
///
void
Sema::ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl) {
ObjCInterfaceDecl *SDecl = IDecl->getSuperClass();
if (!SDecl)
return;
// FIXME: O(N^2)
for (ObjCInterfaceDecl::classprop_iterator S = SDecl->classprop_begin(),
E = SDecl->classprop_end(); S != E; ++S) {
ObjCPropertyDecl *SuperPDecl = (*S);
// Does property in super class has declaration in current class?
for (ObjCInterfaceDecl::classprop_iterator I = IDecl->classprop_begin(),
E = IDecl->classprop_end(); I != E; ++I) {
ObjCPropertyDecl *PDecl = (*I);
if (SuperPDecl->getIdentifier() == PDecl->getIdentifier())
DiagnosePropertyMismatch(PDecl, SuperPDecl,
SDecl->getIdentifier());
}
}
}
/// MergeOneProtocolPropertiesIntoClass - This routine goes thru the list
/// of properties declared in a protocol and adds them to the list
/// of properties for current class/category if it is not there already.
void
Sema::MergeOneProtocolPropertiesIntoClass(Decl *CDecl,
ObjCProtocolDecl *PDecl) {
llvm::SmallVector<ObjCPropertyDecl*, 16> mergeProperties;
ObjCInterfaceDecl *IDecl = dyn_cast_or_null<ObjCInterfaceDecl>(CDecl);
if (!IDecl) {
// Category
ObjCCategoryDecl *CatDecl = static_cast<ObjCCategoryDecl*>(CDecl);
assert (CatDecl && "MergeOneProtocolPropertiesIntoClass");
for (ObjCProtocolDecl::classprop_iterator P = PDecl->classprop_begin(),
E = PDecl->classprop_end(); P != E; ++P) {
ObjCPropertyDecl *Pr = (*P);
ObjCCategoryDecl::classprop_iterator CP, CE;
// Is this property already in category's list of properties?
for (CP = CatDecl->classprop_begin(), CE = CatDecl->classprop_end();
CP != CE; ++CP)
if ((*CP)->getIdentifier() == Pr->getIdentifier())
break;
if (CP == CE)
// Add this property to list of properties for thie class.
mergeProperties.push_back(Pr);
else
// Property protocol already exist in class. Diagnose any mismatch.
DiagnosePropertyMismatch((*CP), Pr, PDecl->getIdentifier());
}
CatDecl->mergeProperties(&mergeProperties[0], mergeProperties.size());
return;
}
for (ObjCProtocolDecl::classprop_iterator P = PDecl->classprop_begin(),
E = PDecl->classprop_end(); P != E; ++P) {
ObjCPropertyDecl *Pr = (*P);
ObjCInterfaceDecl::classprop_iterator CP, CE;
// Is this property already in class's list of properties?
for (CP = IDecl->classprop_begin(), CE = IDecl->classprop_end();
CP != CE; ++CP)
if ((*CP)->getIdentifier() == Pr->getIdentifier())
break;
if (CP == CE)
// Add this property to list of properties for thie class.
mergeProperties.push_back(Pr);
else
// Property protocol already exist in class. Diagnose any mismatch.
DiagnosePropertyMismatch((*CP), Pr, PDecl->getIdentifier());
}
IDecl->mergeProperties(&mergeProperties[0], mergeProperties.size());
}
/// MergeProtocolPropertiesIntoClass - This routine merges properties
/// declared in 'MergeItsProtocols' objects (which can be a class or an
/// inherited protocol into the list of properties for class/category 'CDecl'
///
void
Sema::MergeProtocolPropertiesIntoClass(Decl *CDecl,
DeclTy *MergeItsProtocols) {
Decl *ClassDecl = static_cast<Decl *>(MergeItsProtocols);
ObjCInterfaceDecl *IDecl = dyn_cast_or_null<ObjCInterfaceDecl>(CDecl);
if (!IDecl) {
// Category
ObjCCategoryDecl *CatDecl = static_cast<ObjCCategoryDecl*>(CDecl);
assert (CatDecl && "MergeProtocolPropertiesIntoClass");
if (ObjCCategoryDecl *MDecl = dyn_cast<ObjCCategoryDecl>(ClassDecl)) {
for (ObjCCategoryDecl::protocol_iterator P = MDecl->protocol_begin(),
E = MDecl->protocol_end(); P != E; ++P)
// Merge properties of category (*P) into IDECL's
MergeOneProtocolPropertiesIntoClass(CatDecl, *P);
// Go thru the list of protocols for this category and recursively merge
// their properties into this class as well.
for (ObjCCategoryDecl::protocol_iterator P = CatDecl->protocol_begin(),
E = CatDecl->protocol_end(); P != E; ++P)
MergeProtocolPropertiesIntoClass(CatDecl, *P);
} else {
ObjCProtocolDecl *MD = cast<ObjCProtocolDecl>(ClassDecl);
for (ObjCProtocolDecl::protocol_iterator P = MD->protocol_begin(),
E = MD->protocol_end(); P != E; ++P)
MergeOneProtocolPropertiesIntoClass(CatDecl, (*P));
}
return;
}
if (ObjCInterfaceDecl *MDecl = dyn_cast<ObjCInterfaceDecl>(ClassDecl)) {
for (ObjCInterfaceDecl::protocol_iterator P = MDecl->protocol_begin(),
E = MDecl->protocol_end(); P != E; ++P)
// Merge properties of class (*P) into IDECL's
MergeOneProtocolPropertiesIntoClass(IDecl, *P);
// Go thru the list of protocols for this class and recursively merge
// their properties into this class as well.
for (ObjCInterfaceDecl::protocol_iterator P = IDecl->protocol_begin(),
E = IDecl->protocol_end(); P != E; ++P)
MergeProtocolPropertiesIntoClass(IDecl, *P);
} else {
ObjCProtocolDecl *MD = cast<ObjCProtocolDecl>(ClassDecl);
for (ObjCProtocolDecl::protocol_iterator P = MD->protocol_begin(),
E = MD->protocol_end(); P != E; ++P)
MergeOneProtocolPropertiesIntoClass(IDecl, (*P));
}
}
/// ActOnForwardProtocolDeclaration -
Action::DeclTy *
Sema::ActOnForwardProtocolDeclaration(SourceLocation AtProtocolLoc,
const IdentifierLocPair *IdentList,
unsigned NumElts,
AttributeList *attrList) {
llvm::SmallVector<ObjCProtocolDecl*, 32> Protocols;
for (unsigned i = 0; i != NumElts; ++i) {
IdentifierInfo *Ident = IdentList[i].first;
ObjCProtocolDecl *&PDecl = ObjCProtocols[Ident];
if (PDecl == 0) // Not already seen?
PDecl = ObjCProtocolDecl::Create(Context, IdentList[i].second, Ident);
if (attrList)
ProcessDeclAttributeList(PDecl, attrList);
Protocols.push_back(PDecl);
}
ObjCForwardProtocolDecl *PDecl =
ObjCForwardProtocolDecl::Create(Context, AtProtocolLoc,
&Protocols[0], Protocols.size());
CheckObjCDeclScope(PDecl);
return PDecl;
}
Sema::DeclTy *Sema::
ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc,
IdentifierInfo *ClassName, SourceLocation ClassLoc,
IdentifierInfo *CategoryName,
SourceLocation CategoryLoc,
DeclTy * const *ProtoRefs,
unsigned NumProtoRefs,
SourceLocation EndProtoLoc) {
ObjCInterfaceDecl *IDecl = getObjCInterfaceDecl(ClassName);
ObjCCategoryDecl *CDecl =
ObjCCategoryDecl::Create(Context, AtInterfaceLoc, CategoryName);
CDecl->setClassInterface(IDecl);
/// Check that class of this category is already completely declared.
if (!IDecl || IDecl->isForwardDecl())
Diag(ClassLoc, diag::err_undef_interface) << ClassName;
else {
/// Check for duplicate interface declaration for this category
ObjCCategoryDecl *CDeclChain;
for (CDeclChain = IDecl->getCategoryList(); CDeclChain;
CDeclChain = CDeclChain->getNextClassCategory()) {
if (CategoryName && CDeclChain->getIdentifier() == CategoryName) {
Diag(CategoryLoc, diag::warn_dup_category_def)
<< ClassName << CategoryName;
Diag(CDeclChain->getLocation(), diag::note_previous_definition);
break;
}
}
if (!CDeclChain)
CDecl->insertNextClassCategory();
}
if (NumProtoRefs) {
CDecl->addReferencedProtocols((ObjCProtocolDecl**)ProtoRefs, NumProtoRefs);
CDecl->setLocEnd(EndProtoLoc);
}
CheckObjCDeclScope(CDecl);
return CDecl;
}
/// ActOnStartCategoryImplementation - Perform semantic checks on the
/// category implementation declaration and build an ObjCCategoryImplDecl
/// object.
Sema::DeclTy *Sema::ActOnStartCategoryImplementation(
SourceLocation AtCatImplLoc,
IdentifierInfo *ClassName, SourceLocation ClassLoc,
IdentifierInfo *CatName, SourceLocation CatLoc) {
ObjCInterfaceDecl *IDecl = getObjCInterfaceDecl(ClassName);
ObjCCategoryImplDecl *CDecl =
ObjCCategoryImplDecl::Create(Context, AtCatImplLoc, CatName, IDecl);
/// Check that class of this category is already completely declared.
if (!IDecl || IDecl->isForwardDecl())
Diag(ClassLoc, diag::err_undef_interface) << ClassName;
/// TODO: Check that CatName, category name, is not used in another
// implementation.
ObjCCategoryImpls.push_back(CDecl);
CheckObjCDeclScope(CDecl);
return CDecl;
}
Sema::DeclTy *Sema::ActOnStartClassImplementation(
SourceLocation AtClassImplLoc,
IdentifierInfo *ClassName, SourceLocation ClassLoc,
IdentifierInfo *SuperClassname,
SourceLocation SuperClassLoc) {
ObjCInterfaceDecl* IDecl = 0;
// Check for another declaration kind with the same name.
Decl *PrevDecl = LookupDecl(ClassName, Decl::IDNS_Ordinary, TUScope);
if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) {
Diag(ClassLoc, diag::err_redefinition_different_kind) << ClassName;
Diag(PrevDecl->getLocation(), diag::note_previous_definition);
}
else {
// Is there an interface declaration of this class; if not, warn!
IDecl = dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl);
if (!IDecl)
Diag(ClassLoc, diag::warn_undef_interface) << ClassName;
}
// Check that super class name is valid class name
ObjCInterfaceDecl* SDecl = 0;
if (SuperClassname) {
// Check if a different kind of symbol declared in this scope.
PrevDecl = LookupDecl(SuperClassname, Decl::IDNS_Ordinary, TUScope);
if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) {
Diag(SuperClassLoc, diag::err_redefinition_different_kind)
<< SuperClassname;
Diag(PrevDecl->getLocation(), diag::note_previous_definition);
} else {
SDecl = dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl);
if (!SDecl)
Diag(SuperClassLoc, diag::err_undef_superclass)
<< SuperClassname << ClassName;
else if (IDecl && IDecl->getSuperClass() != SDecl) {
// This implementation and its interface do not have the same
// super class.
Diag(SuperClassLoc, diag::err_conflicting_super_class)
<< SDecl->getDeclName();
Diag(SDecl->getLocation(), diag::note_previous_definition);
}
}
}
if (!IDecl) {
// Legacy case of @implementation with no corresponding @interface.
// Build, chain & install the interface decl into the identifier.
// FIXME: Do we support attributes on the @implementation? If so
// we should copy them over.
IDecl = ObjCInterfaceDecl::Create(Context, AtClassImplLoc, ClassName,
ClassLoc, false, true);
ObjCInterfaceDecls[ClassName] = IDecl;
IDecl->setSuperClass(SDecl);
IDecl->setLocEnd(ClassLoc);
// Remember that this needs to be removed when the scope is popped.
TUScope->AddDecl(IDecl);
}
ObjCImplementationDecl* IMPDecl =
ObjCImplementationDecl::Create(Context, AtClassImplLoc, ClassName,
IDecl, SDecl);
if (CheckObjCDeclScope(IMPDecl))
return IMPDecl;
// Check that there is no duplicate implementation of this class.
if (ObjCImplementations[ClassName])
// FIXME: Don't leak everything!
Diag(ClassLoc, diag::err_dup_implementation_class) << ClassName;
else // add it to the list.
ObjCImplementations[ClassName] = IMPDecl;
return IMPDecl;
}
void Sema::CheckImplementationIvars(ObjCImplementationDecl *ImpDecl,
ObjCIvarDecl **ivars, unsigned numIvars,
SourceLocation RBrace) {
assert(ImpDecl && "missing implementation decl");
ObjCInterfaceDecl* IDecl = getObjCInterfaceDecl(ImpDecl->getIdentifier());
if (!IDecl)
return;
/// Check case of non-existing @interface decl.
/// (legacy objective-c @implementation decl without an @interface decl).
/// Add implementations's ivar to the synthesize class's ivar list.
if (IDecl->ImplicitInterfaceDecl()) {
IDecl->addInstanceVariablesToClass(ivars, numIvars, RBrace);
return;
}
// If implementation has empty ivar list, just return.
if (numIvars == 0)
return;
assert(ivars && "missing @implementation ivars");
// Check interface's Ivar list against those in the implementation.
// names and types must match.
//
unsigned j = 0;
ObjCInterfaceDecl::ivar_iterator
IVI = IDecl->ivar_begin(), IVE = IDecl->ivar_end();
for (; numIvars > 0 && IVI != IVE; ++IVI) {
ObjCIvarDecl* ImplIvar = ivars[j++];
ObjCIvarDecl* ClsIvar = *IVI;
assert (ImplIvar && "missing implementation ivar");
assert (ClsIvar && "missing class ivar");
if (Context.getCanonicalType(ImplIvar->getType()) !=
Context.getCanonicalType(ClsIvar->getType())) {
Diag(ImplIvar->getLocation(), diag::err_conflicting_ivar_type)
<< ImplIvar->getIdentifier()
<< ImplIvar->getType() << ClsIvar->getType();
Diag(ClsIvar->getLocation(), diag::note_previous_definition);
}
// TODO: Two mismatched (unequal width) Ivar bitfields should be diagnosed
// as error.
else if (ImplIvar->getIdentifier() != ClsIvar->getIdentifier()) {
Diag(ImplIvar->getLocation(), diag::err_conflicting_ivar_name)
<< ImplIvar->getIdentifier() << ClsIvar->getIdentifier();
Diag(ClsIvar->getLocation(), diag::note_previous_definition);
return;
}
--numIvars;
}
if (numIvars > 0)
Diag(ivars[j]->getLocation(), diag::err_inconsistant_ivar_count);
else if (IVI != IVE)
Diag((*IVI)->getLocation(), diag::err_inconsistant_ivar_count);
}
void Sema::WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method,
bool &IncompleteImpl) {
if (!IncompleteImpl) {
Diag(ImpLoc, diag::warn_incomplete_impl);
IncompleteImpl = true;
}
Diag(ImpLoc, diag::warn_undef_method_impl) << method->getDeclName();
}
void Sema::WarnConflictingTypedMethods(ObjCMethodDecl *ImpMethodDecl,
ObjCMethodDecl *IntfMethodDecl) {
bool err = false;
QualType ImpMethodQType =
Context.getCanonicalType(ImpMethodDecl->getResultType());
QualType IntfMethodQType =
Context.getCanonicalType(IntfMethodDecl->getResultType());
if (!Context.typesAreCompatible(IntfMethodQType, ImpMethodQType))
err = true;
else for (ObjCMethodDecl::param_iterator IM=ImpMethodDecl->param_begin(),
IF=IntfMethodDecl->param_begin(),
EM=ImpMethodDecl->param_end(); IM!=EM; ++IM, IF++) {
ImpMethodQType = Context.getCanonicalType((*IM)->getType());
IntfMethodQType = Context.getCanonicalType((*IF)->getType());
if (!Context.typesAreCompatible(IntfMethodQType, ImpMethodQType)) {
err = true;
break;
}
}
if (err) {
Diag(ImpMethodDecl->getLocation(), diag::warn_conflicting_types)
<< ImpMethodDecl->getDeclName();
Diag(IntfMethodDecl->getLocation(), diag::note_previous_definition);
}
}
/// FIXME: Type hierarchies in Objective-C can be deep. We could most
/// likely improve the efficiency of selector lookups and type
/// checking by associating with each protocol / interface / category
/// the flattened instance tables. If we used an immutable set to keep
/// the table then it wouldn't add significant memory cost and it
/// would be handy for lookups.
/// CheckProtocolMethodDefs - This routine checks unimplemented methods
/// Declared in protocol, and those referenced by it.
void Sema::CheckProtocolMethodDefs(SourceLocation ImpLoc,
ObjCProtocolDecl *PDecl,
bool& IncompleteImpl,
const llvm::DenseSet<Selector> &InsMap,
const llvm::DenseSet<Selector> &ClsMap,
ObjCInterfaceDecl *IDecl) {
ObjCInterfaceDecl *Super = IDecl->getSuperClass();
// If a method lookup fails locally we still need to look and see if
// the method was implemented by a base class or an inherited
// protocol. This lookup is slow, but occurs rarely in correct code
// and otherwise would terminate in a warning.
// check unimplemented instance methods.
for (ObjCProtocolDecl::instmeth_iterator I = PDecl->instmeth_begin(),
E = PDecl->instmeth_end(); I != E; ++I) {
ObjCMethodDecl *method = *I;
if (method->getImplementationControl() != ObjCMethodDecl::Optional &&
!method->isSynthesized() && !InsMap.count(method->getSelector()) &&
(!Super || !Super->lookupInstanceMethod(method->getSelector())))
WarnUndefinedMethod(ImpLoc, method, IncompleteImpl);
}
// check unimplemented class methods
for (ObjCProtocolDecl::classmeth_iterator I = PDecl->classmeth_begin(),
E = PDecl->classmeth_end(); I != E; ++I) {
ObjCMethodDecl *method = *I;
if (method->getImplementationControl() != ObjCMethodDecl::Optional &&
!ClsMap.count(method->getSelector()) &&
(!Super || !Super->lookupClassMethod(method->getSelector())))
WarnUndefinedMethod(ImpLoc, method, IncompleteImpl);
}
// Check on this protocols's referenced protocols, recursively.
for (ObjCProtocolDecl::protocol_iterator PI = PDecl->protocol_begin(),
E = PDecl->protocol_end(); PI != E; ++PI)
CheckProtocolMethodDefs(ImpLoc, *PI, IncompleteImpl, InsMap, ClsMap, IDecl);
}
void Sema::ImplMethodsVsClassMethods(ObjCImplementationDecl* IMPDecl,
ObjCInterfaceDecl* IDecl) {
llvm::DenseSet<Selector> InsMap;
// Check and see if instance methods in class interface have been
// implemented in the implementation class.
for (ObjCImplementationDecl::instmeth_iterator I = IMPDecl->instmeth_begin(),
E = IMPDecl->instmeth_end(); I != E; ++I)
InsMap.insert((*I)->getSelector());
bool IncompleteImpl = false;
for (ObjCInterfaceDecl::instmeth_iterator I = IDecl->instmeth_begin(),
E = IDecl->instmeth_end(); I != E; ++I)
if (!(*I)->isSynthesized() && !InsMap.count((*I)->getSelector()))
WarnUndefinedMethod(IMPDecl->getLocation(), *I, IncompleteImpl);
else if (!(*I)->isSynthesized()){
ObjCMethodDecl *ImpMethodDecl =
IMPDecl->getInstanceMethod((*I)->getSelector());
ObjCMethodDecl *IntfMethodDecl =
IDecl->getInstanceMethod((*I)->getSelector());
WarnConflictingTypedMethods(ImpMethodDecl, IntfMethodDecl);
}
llvm::DenseSet<Selector> ClsMap;
// Check and see if class methods in class interface have been
// implemented in the implementation class.
for (ObjCImplementationDecl::classmeth_iterator I =IMPDecl->classmeth_begin(),
E = IMPDecl->classmeth_end(); I != E; ++I)
ClsMap.insert((*I)->getSelector());
for (ObjCInterfaceDecl::classmeth_iterator I = IDecl->classmeth_begin(),
E = IDecl->classmeth_end(); I != E; ++I)
if (!ClsMap.count((*I)->getSelector()))
WarnUndefinedMethod(IMPDecl->getLocation(), *I, IncompleteImpl);
else {
ObjCMethodDecl *ImpMethodDecl =
IMPDecl->getClassMethod((*I)->getSelector());
ObjCMethodDecl *IntfMethodDecl =
IDecl->getClassMethod((*I)->getSelector());
WarnConflictingTypedMethods(ImpMethodDecl, IntfMethodDecl);
}
// Check the protocol list for unimplemented methods in the @implementation
// class.
const ObjCList<ObjCProtocolDecl> &Protocols =
IDecl->getReferencedProtocols();
for (ObjCList<ObjCProtocolDecl>::iterator I = Protocols.begin(),
E = Protocols.end(); I != E; ++I)
CheckProtocolMethodDefs(IMPDecl->getLocation(), *I,
IncompleteImpl, InsMap, ClsMap, IDecl);
}
/// ImplCategoryMethodsVsIntfMethods - Checks that methods declared in the
/// category interface are implemented in the category @implementation.
void Sema::ImplCategoryMethodsVsIntfMethods(ObjCCategoryImplDecl *CatImplDecl,
ObjCCategoryDecl *CatClassDecl) {
llvm::DenseSet<Selector> InsMap;
// Check and see if instance methods in category interface have been
// implemented in its implementation class.
for (ObjCCategoryImplDecl::instmeth_iterator I =CatImplDecl->instmeth_begin(),
E = CatImplDecl->instmeth_end(); I != E; ++I)
InsMap.insert((*I)->getSelector());
bool IncompleteImpl = false;
for (ObjCCategoryDecl::instmeth_iterator I = CatClassDecl->instmeth_begin(),
E = CatClassDecl->instmeth_end(); I != E; ++I)
if (!InsMap.count((*I)->getSelector()))
WarnUndefinedMethod(CatImplDecl->getLocation(), *I, IncompleteImpl);
else {
ObjCMethodDecl *ImpMethodDecl =
CatImplDecl->getInstanceMethod((*I)->getSelector());
ObjCMethodDecl *IntfMethodDecl =
CatClassDecl->getInstanceMethod((*I)->getSelector());
WarnConflictingTypedMethods(ImpMethodDecl, IntfMethodDecl);
}
llvm::DenseSet<Selector> ClsMap;
// Check and see if class methods in category interface have been
// implemented in its implementation class.
for (ObjCCategoryImplDecl::classmeth_iterator
I = CatImplDecl->classmeth_begin(), E = CatImplDecl->classmeth_end();
I != E; ++I)
ClsMap.insert((*I)->getSelector());
for (ObjCCategoryDecl::classmeth_iterator I = CatClassDecl->classmeth_begin(),
E = CatClassDecl->classmeth_end(); I != E; ++I)
if (!ClsMap.count((*I)->getSelector()))
WarnUndefinedMethod(CatImplDecl->getLocation(), *I, IncompleteImpl);
else {
ObjCMethodDecl *ImpMethodDecl =
CatImplDecl->getClassMethod((*I)->getSelector());
ObjCMethodDecl *IntfMethodDecl =
CatClassDecl->getClassMethod((*I)->getSelector());
WarnConflictingTypedMethods(ImpMethodDecl, IntfMethodDecl);
}
// Check the protocol list for unimplemented methods in the @implementation
// class.
for (ObjCCategoryDecl::protocol_iterator PI = CatClassDecl->protocol_begin(),
E = CatClassDecl->protocol_end(); PI != E; ++PI)
CheckProtocolMethodDefs(CatImplDecl->getLocation(), *PI, IncompleteImpl,
InsMap, ClsMap, CatClassDecl->getClassInterface());
}
/// ActOnForwardClassDeclaration -
Action::DeclTy *
Sema::ActOnForwardClassDeclaration(SourceLocation AtClassLoc,
IdentifierInfo **IdentList, unsigned NumElts)
{
llvm::SmallVector<ObjCInterfaceDecl*, 32> Interfaces;
for (unsigned i = 0; i != NumElts; ++i) {
// Check for another declaration kind with the same name.
Decl *PrevDecl = LookupDecl(IdentList[i], Decl::IDNS_Ordinary, TUScope);
if (PrevDecl && PrevDecl->isTemplateParameter()) {
// Maybe we will complain about the shadowed template parameter.
DiagnoseTemplateParameterShadow(AtClassLoc, PrevDecl);
// Just pretend that we didn't see the previous declaration.
PrevDecl = 0;
}
if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) {
// GCC apparently allows the following idiom:
//
// typedef NSObject < XCElementTogglerP > XCElementToggler;
// @class XCElementToggler;
//
// FIXME: Make an extension?
TypedefDecl *TDD = dyn_cast<TypedefDecl>(PrevDecl);
if (!TDD || !isa<ObjCInterfaceType>(TDD->getUnderlyingType())) {
Diag(AtClassLoc, diag::err_redefinition_different_kind) << IdentList[i];
Diag(PrevDecl->getLocation(), diag::note_previous_definition);
}
}
ObjCInterfaceDecl *IDecl = dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl);
if (!IDecl) { // Not already seen? Make a forward decl.
IDecl = ObjCInterfaceDecl::Create(Context, AtClassLoc, IdentList[i],
SourceLocation(), true);
ObjCInterfaceDecls[IdentList[i]] = IDecl;
// Remember that this needs to be removed when the scope is popped.
TUScope->AddDecl(IDecl);
}
Interfaces.push_back(IDecl);
}
ObjCClassDecl *CDecl = ObjCClassDecl::Create(Context, AtClassLoc,
&Interfaces[0],
Interfaces.size());
CheckObjCDeclScope(CDecl);
return CDecl;
}
/// MatchTwoMethodDeclarations - Checks that two methods have matching type and
/// returns true, or false, accordingly.
/// TODO: Handle protocol list; such as id<p1,p2> in type comparisons
bool Sema::MatchTwoMethodDeclarations(const ObjCMethodDecl *Method,
const ObjCMethodDecl *PrevMethod,
bool matchBasedOnSizeAndAlignment) {
QualType T1 = Context.getCanonicalType(Method->getResultType());
QualType T2 = Context.getCanonicalType(PrevMethod->getResultType());
if (T1 != T2) {
// The result types are different.
if (!matchBasedOnSizeAndAlignment)
return false;
// Incomplete types don't have a size and alignment.
if (T1->isIncompleteType() || T2->isIncompleteType())
return false;
// Check is based on size and alignment.
if (Context.getTypeInfo(T1) != Context.getTypeInfo(T2))
return false;
}
for (unsigned i = 0, e = Method->getNumParams(); i != e; ++i) {
T1 = Context.getCanonicalType(Method->getParamDecl(i)->getType());
T2 = Context.getCanonicalType(PrevMethod->getParamDecl(i)->getType());
if (T1 != T2) {
// The result types are different.
if (!matchBasedOnSizeAndAlignment)
return false;
// Incomplete types don't have a size and alignment.
if (T1->isIncompleteType() || T2->isIncompleteType())
return false;
// Check is based on size and alignment.
if (Context.getTypeInfo(T1) != Context.getTypeInfo(T2))
return false;
}
}
return true;
}
void Sema::AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method) {
ObjCMethodList &FirstMethod = InstanceMethodPool[Method->getSelector()];
if (!FirstMethod.Method) {
// Haven't seen a method with this selector name yet - add it.
FirstMethod.Method = Method;
FirstMethod.Next = 0;
} else {
// We've seen a method with this name, now check the type signature(s).
bool match = MatchTwoMethodDeclarations(Method, FirstMethod.Method);
for (ObjCMethodList *Next = FirstMethod.Next; !match && Next;
Next = Next->Next)
match = MatchTwoMethodDeclarations(Method, Next->Method);
if (!match) {
// We have a new signature for an existing method - add it.
// This is extremely rare. Only 1% of Cocoa selectors are "overloaded".
FirstMethod.Next = new ObjCMethodList(Method, FirstMethod.Next);;
}
}
}
// FIXME: Finish implementing -Wno-strict-selector-match.
ObjCMethodDecl *Sema::LookupInstanceMethodInGlobalPool(Selector Sel,
SourceRange R) {
ObjCMethodList &MethList = InstanceMethodPool[Sel];
bool issueWarning = false;
if (MethList.Method && MethList.Next) {
for (ObjCMethodList *Next = MethList.Next; Next; Next = Next->Next)
// This checks if the methods differ by size & alignment.
if (!MatchTwoMethodDeclarations(MethList.Method, Next->Method, true))
issueWarning = true;
}
if (issueWarning && (MethList.Method && MethList.Next)) {
Diag(R.getBegin(), diag::warn_multiple_method_decl) << Sel << R;
Diag(MethList.Method->getLocStart(), diag::note_using_decl)
<< MethList.Method->getSourceRange();
for (ObjCMethodList *Next = MethList.Next; Next; Next = Next->Next)
Diag(Next->Method->getLocStart(), diag::note_also_found_decl)
<< Next->Method->getSourceRange();
}
return MethList.Method;
}
void Sema::AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method) {
ObjCMethodList &FirstMethod = FactoryMethodPool[Method->getSelector()];
if (!FirstMethod.Method) {
// Haven't seen a method with this selector name yet - add it.
FirstMethod.Method = Method;
FirstMethod.Next = 0;
} else {
// We've seen a method with this name, now check the type signature(s).
bool match = MatchTwoMethodDeclarations(Method, FirstMethod.Method);
for (ObjCMethodList *Next = FirstMethod.Next; !match && Next;
Next = Next->Next)
match = MatchTwoMethodDeclarations(Method, Next->Method);
if (!match) {
// We have a new signature for an existing method - add it.
// This is extremely rare. Only 1% of Cocoa selectors are "overloaded".
struct ObjCMethodList *OMI = new ObjCMethodList(Method, FirstMethod.Next);
FirstMethod.Next = OMI;
}
}
}
/// diagnosePropertySetterGetterMismatch - Make sure that use-defined
/// setter/getter methods have the property type and issue diagnostics
/// if they don't.
///
void
Sema::diagnosePropertySetterGetterMismatch(ObjCPropertyDecl *property,
const ObjCMethodDecl *GetterMethod,
const ObjCMethodDecl *SetterMethod) {
if (GetterMethod &&
GetterMethod->getResultType() != property->getType()) {
Diag(property->getLocation(),
diag::err_accessor_property_type_mismatch)
<< property->getDeclName()
<< GetterMethod->getSelector().getAsIdentifierInfo();
Diag(GetterMethod->getLocation(), diag::note_declared_at);
}
if (SetterMethod) {
if (Context.getCanonicalType(SetterMethod->getResultType())
!= Context.VoidTy)
Diag(SetterMethod->getLocation(), diag::err_setter_type_void);
if (SetterMethod->getNumParams() != 1 ||
(SetterMethod->getParamDecl(0)->getType() != property->getType())) {
Diag(property->getLocation(),
diag::err_accessor_property_type_mismatch)
<< property->getDeclName()
<< SetterMethod->getSelector().getAsIdentifierInfo();
Diag(SetterMethod->getLocation(), diag::note_declared_at);
}
}
}
// Note: For class/category implemenations, allMethods/allProperties is
// always null.
void Sema::ActOnAtEnd(SourceLocation AtEndLoc, DeclTy *classDecl,
DeclTy **allMethods, unsigned allNum,
DeclTy **allProperties, unsigned pNum) {
Decl *ClassDecl = static_cast<Decl *>(classDecl);
// FIXME: If we don't have a ClassDecl, we have an error. We should consider
// always passing in a decl. If the decl has an error, isInvalidDecl()
// should be true.
if (!ClassDecl)
return;
llvm::SmallVector<ObjCMethodDecl*, 32> insMethods;
llvm::SmallVector<ObjCMethodDecl*, 16> clsMethods;
llvm::DenseMap<Selector, const ObjCMethodDecl*> InsMap;
llvm::DenseMap<Selector, const ObjCMethodDecl*> ClsMap;
bool isInterfaceDeclKind =
isa<ObjCInterfaceDecl>(ClassDecl) || isa<ObjCCategoryDecl>(ClassDecl)
|| isa<ObjCProtocolDecl>(ClassDecl);
bool checkIdenticalMethods = isa<ObjCImplementationDecl>(ClassDecl);
if (pNum != 0) {
if (ObjCInterfaceDecl *IDecl = dyn_cast<ObjCInterfaceDecl>(ClassDecl))
IDecl->addProperties((ObjCPropertyDecl**)allProperties, pNum);
else if (ObjCCategoryDecl *CDecl = dyn_cast<ObjCCategoryDecl>(ClassDecl))
CDecl->addProperties((ObjCPropertyDecl**)allProperties, pNum);
else if (ObjCProtocolDecl *PDecl = dyn_cast<ObjCProtocolDecl>(ClassDecl))
PDecl->addProperties((ObjCPropertyDecl**)allProperties, pNum);
else
assert(false && "ActOnAtEnd - property declaration misplaced");
}
for (unsigned i = 0; i < allNum; i++ ) {
ObjCMethodDecl *Method =
cast_or_null<ObjCMethodDecl>(static_cast<Decl*>(allMethods[i]));
if (!Method) continue; // Already issued a diagnostic.
if (Method->isInstance()) {
/// Check for instance method of the same name with incompatible types
const ObjCMethodDecl *&PrevMethod = InsMap[Method->getSelector()];
bool match = PrevMethod ? MatchTwoMethodDeclarations(Method, PrevMethod)
: false;
if ((isInterfaceDeclKind && PrevMethod && !match)
|| (checkIdenticalMethods && match)) {
Diag(Method->getLocation(), diag::err_duplicate_method_decl)
<< Method->getDeclName();
Diag(PrevMethod->getLocation(), diag::note_previous_declaration);
} else {
insMethods.push_back(Method);
InsMap[Method->getSelector()] = Method;
/// The following allows us to typecheck messages to "id".
AddInstanceMethodToGlobalPool(Method);
}
}
else {
/// Check for class method of the same name with incompatible types
const ObjCMethodDecl *&PrevMethod = ClsMap[Method->getSelector()];
bool match = PrevMethod ? MatchTwoMethodDeclarations(Method, PrevMethod)
: false;
if ((isInterfaceDeclKind && PrevMethod && !match)
|| (checkIdenticalMethods && match)) {
Diag(Method->getLocation(), diag::err_duplicate_method_decl)
<< Method->getDeclName();
Diag(PrevMethod->getLocation(), diag::note_previous_declaration);
} else {
clsMethods.push_back(Method);
ClsMap[Method->getSelector()] = Method;
/// The following allows us to typecheck messages to "Class".
AddFactoryMethodToGlobalPool(Method);
}
}
}
// Save the size so we can detect if we've added any property methods.
unsigned int insMethodsSizePriorToPropAdds = insMethods.size();
unsigned int clsMethodsSizePriorToPropAdds = clsMethods.size();
if (ObjCInterfaceDecl *I = dyn_cast<ObjCInterfaceDecl>(ClassDecl)) {
// Compares properties declared in this class to those of its
// super class.
ComparePropertiesInBaseAndSuper(I);
MergeProtocolPropertiesIntoClass(I, I);
for (ObjCInterfaceDecl::classprop_iterator i = I->classprop_begin(),
e = I->classprop_end(); i != e; ++i) {
diagnosePropertySetterGetterMismatch((*i), InsMap[(*i)->getGetterName()],
InsMap[(*i)->getSetterName()]);
I->addPropertyMethods(Context, *i, insMethods, InsMap);
}
I->addMethods(&insMethods[0], insMethods.size(),
&clsMethods[0], clsMethods.size(), AtEndLoc);
} else if (ObjCProtocolDecl *P = dyn_cast<ObjCProtocolDecl>(ClassDecl)) {
for (ObjCProtocolDecl::classprop_iterator i = P->classprop_begin(),
e = P->classprop_end(); i != e; ++i) {
diagnosePropertySetterGetterMismatch((*i), InsMap[(*i)->getGetterName()],
InsMap[(*i)->getSetterName()]);
P->addPropertyMethods(Context, *i, insMethods, InsMap);
}
P->addMethods(&insMethods[0], insMethods.size(),
&clsMethods[0], clsMethods.size(), AtEndLoc);
}
else if (ObjCCategoryDecl *C = dyn_cast<ObjCCategoryDecl>(ClassDecl)) {
// Categories are used to extend the class by declaring new methods.
// By the same token, they are also used to add new properties. No
// need to compare the added property to those in the class.
// Merge protocol properties into category
MergeProtocolPropertiesIntoClass(C, C);
for (ObjCCategoryDecl::classprop_iterator i = C->classprop_begin(),
e = C->classprop_end(); i != e; ++i) {
diagnosePropertySetterGetterMismatch((*i), InsMap[(*i)->getGetterName()],
InsMap[(*i)->getSetterName()]);
C->addPropertyMethods(Context, *i, insMethods, InsMap);
}
C->addMethods(&insMethods[0], insMethods.size(),
&clsMethods[0], clsMethods.size(), AtEndLoc);
}
else if (ObjCImplementationDecl *IC =
dyn_cast<ObjCImplementationDecl>(ClassDecl)) {
IC->setLocEnd(AtEndLoc);
if (ObjCInterfaceDecl* IDecl = getObjCInterfaceDecl(IC->getIdentifier()))
ImplMethodsVsClassMethods(IC, IDecl);
} else {
ObjCCategoryImplDecl* CatImplClass = cast<ObjCCategoryImplDecl>(ClassDecl);
CatImplClass->setLocEnd(AtEndLoc);
ObjCInterfaceDecl* IDecl = CatImplClass->getClassInterface();
// Find category interface decl and then check that all methods declared
// in this interface are implemented in the category @implementation.
if (IDecl) {
for (ObjCCategoryDecl *Categories = IDecl->getCategoryList();
Categories; Categories = Categories->getNextClassCategory()) {
if (Categories->getIdentifier() == CatImplClass->getIdentifier()) {
ImplCategoryMethodsVsIntfMethods(CatImplClass, Categories);
break;
}
}
}
}
// Add any synthesized methods to the global pool. This allows us to
// handle the following, which is supported by GCC (and part of the design).
//
// @interface Foo
// @property double bar;
// @end
//
// void thisIsUnfortunate() {
// id foo;
// double bar = [foo bar];
// }
//
if (insMethodsSizePriorToPropAdds < insMethods.size())
for (unsigned i = insMethodsSizePriorToPropAdds; i < insMethods.size(); i++)
AddInstanceMethodToGlobalPool(insMethods[i]);
if (clsMethodsSizePriorToPropAdds < clsMethods.size())
for (unsigned i = clsMethodsSizePriorToPropAdds; i < clsMethods.size(); i++)
AddFactoryMethodToGlobalPool(clsMethods[i]);
}
/// CvtQTToAstBitMask - utility routine to produce an AST bitmask for
/// objective-c's type qualifier from the parser version of the same info.
static Decl::ObjCDeclQualifier
CvtQTToAstBitMask(ObjCDeclSpec::ObjCDeclQualifier PQTVal) {
Decl::ObjCDeclQualifier ret = Decl::OBJC_TQ_None;
if (PQTVal & ObjCDeclSpec::DQ_In)
ret = (Decl::ObjCDeclQualifier)(ret | Decl::OBJC_TQ_In);
if (PQTVal & ObjCDeclSpec::DQ_Inout)
ret = (Decl::ObjCDeclQualifier)(ret | Decl::OBJC_TQ_Inout);
if (PQTVal & ObjCDeclSpec::DQ_Out)
ret = (Decl::ObjCDeclQualifier)(ret | Decl::OBJC_TQ_Out);
if (PQTVal & ObjCDeclSpec::DQ_Bycopy)
ret = (Decl::ObjCDeclQualifier)(ret | Decl::OBJC_TQ_Bycopy);
if (PQTVal & ObjCDeclSpec::DQ_Byref)
ret = (Decl::ObjCDeclQualifier)(ret | Decl::OBJC_TQ_Byref);
if (PQTVal & ObjCDeclSpec::DQ_Oneway)
ret = (Decl::ObjCDeclQualifier)(ret | Decl::OBJC_TQ_Oneway);
return ret;
}
Sema::DeclTy *Sema::ActOnMethodDeclaration(
SourceLocation MethodLoc, SourceLocation EndLoc,
tok::TokenKind MethodType, DeclTy *classDecl,
ObjCDeclSpec &ReturnQT, TypeTy *ReturnType,
Selector Sel,
// optional arguments. The number of types/arguments is obtained
// from the Sel.getNumArgs().
ObjCDeclSpec *ArgQT, TypeTy **ArgTypes, IdentifierInfo **ArgNames,
AttributeList *AttrList, tok::ObjCKeywordKind MethodDeclKind,
bool isVariadic) {
Decl *ClassDecl = static_cast<Decl*>(classDecl);
// Make sure we can establish a context for the method.
if (!ClassDecl) {
Diag(MethodLoc, diag::error_missing_method_context);
return 0;
}
QualType resultDeclType;
if (ReturnType)
resultDeclType = QualType::getFromOpaquePtr(ReturnType);
else // get the type for "id".
resultDeclType = Context.getObjCIdType();
ObjCMethodDecl* ObjCMethod =
ObjCMethodDecl::Create(Context, MethodLoc, EndLoc, Sel, resultDeclType,
ClassDecl,
MethodType == tok::minus, isVariadic,
false,
MethodDeclKind == tok::objc_optional ?
ObjCMethodDecl::Optional :
ObjCMethodDecl::Required);
llvm::SmallVector<ParmVarDecl*, 16> Params;
for (unsigned i = 0; i < Sel.getNumArgs(); i++) {
// FIXME: arg->AttrList must be stored too!
QualType argType;
if (ArgTypes[i]) {
argType = QualType::getFromOpaquePtr(ArgTypes[i]);
// Perform the default array/function conversions (C99 6.7.5.3p[7,8]).
if (argType->isArrayType()) // (char *[]) -> (char **)
argType = Context.getArrayDecayedType(argType);
else if (argType->isFunctionType())
argType = Context.getPointerType(argType);
} else
argType = Context.getObjCIdType();
ParmVarDecl* Param = ParmVarDecl::Create(Context, ObjCMethod,
SourceLocation(/*FIXME*/),
ArgNames[i], argType,
VarDecl::None, 0, 0);
Param->setObjCDeclQualifier(
CvtQTToAstBitMask(ArgQT[i].getObjCDeclQualifier()));
Params.push_back(Param);
}
ObjCMethod->setMethodParams(&Params[0], Sel.getNumArgs());
ObjCMethod->setObjCDeclQualifier(
CvtQTToAstBitMask(ReturnQT.getObjCDeclQualifier()));
const ObjCMethodDecl *PrevMethod = 0;
if (AttrList)
ProcessDeclAttributeList(ObjCMethod, AttrList);
// For implementations (which can be very "coarse grain"), we add the
// method now. This allows the AST to implement lookup methods that work
// incrementally (without waiting until we parse the @end). It also allows
// us to flag multiple declaration errors as they occur.
if (ObjCImplementationDecl *ImpDecl =
dyn_cast<ObjCImplementationDecl>(ClassDecl)) {
if (MethodType == tok::minus) {
PrevMethod = ImpDecl->getInstanceMethod(Sel);
ImpDecl->addInstanceMethod(ObjCMethod);
} else {
PrevMethod = ImpDecl->getClassMethod(Sel);
ImpDecl->addClassMethod(ObjCMethod);
}
}
else if (ObjCCategoryImplDecl *CatImpDecl =
dyn_cast<ObjCCategoryImplDecl>(ClassDecl)) {
if (MethodType == tok::minus) {
PrevMethod = CatImpDecl->getInstanceMethod(Sel);
CatImpDecl->addInstanceMethod(ObjCMethod);
} else {
PrevMethod = CatImpDecl->getClassMethod(Sel);
CatImpDecl->addClassMethod(ObjCMethod);
}
}
if (PrevMethod) {
// You can never have two method definitions with the same name.
Diag(ObjCMethod->getLocation(), diag::err_duplicate_method_decl)
<< ObjCMethod->getDeclName();
Diag(PrevMethod->getLocation(), diag::note_previous_declaration);
}
return ObjCMethod;
}
void Sema::CheckObjCPropertyAttributes(QualType PropertyTy,
SourceLocation Loc,
unsigned &Attributes) {
// FIXME: Improve the reported location.
// readonly and readwrite/assign/retain/copy conflict.
if ((Attributes & ObjCDeclSpec::DQ_PR_readonly) &&
(Attributes & (ObjCDeclSpec::DQ_PR_readwrite |
ObjCDeclSpec::DQ_PR_assign |
ObjCDeclSpec::DQ_PR_copy |
ObjCDeclSpec::DQ_PR_retain))) {
const char * which = (Attributes & ObjCDeclSpec::DQ_PR_readwrite) ?
"readwrite" :
(Attributes & ObjCDeclSpec::DQ_PR_assign) ?
"assign" :
(Attributes & ObjCDeclSpec::DQ_PR_copy) ?
"copy" : "retain";
Diag(Loc, (Attributes & (ObjCDeclSpec::DQ_PR_readwrite)) ?
diag::err_objc_property_attr_mutually_exclusive :
diag::warn_objc_property_attr_mutually_exclusive)
<< "readonly" << which;
}
// Check for copy or retain on non-object types.
if ((Attributes & (ObjCDeclSpec::DQ_PR_copy | ObjCDeclSpec::DQ_PR_retain)) &&
!Context.isObjCObjectPointerType(PropertyTy)) {
Diag(Loc, diag::err_objc_property_requires_object)
<< (Attributes & ObjCDeclSpec::DQ_PR_copy ? "copy" : "retain");
Attributes &= ~(ObjCDeclSpec::DQ_PR_copy | ObjCDeclSpec::DQ_PR_retain);
}
// Check for more than one of { assign, copy, retain }.
if (Attributes & ObjCDeclSpec::DQ_PR_assign) {
if (Attributes & ObjCDeclSpec::DQ_PR_copy) {
Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
<< "assign" << "copy";
Attributes &= ~ObjCDeclSpec::DQ_PR_copy;
}
if (Attributes & ObjCDeclSpec::DQ_PR_retain) {
Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
<< "assign" << "retain";
Attributes &= ~ObjCDeclSpec::DQ_PR_retain;
}
} else if (Attributes & ObjCDeclSpec::DQ_PR_copy) {
if (Attributes & ObjCDeclSpec::DQ_PR_retain) {
Diag(Loc, diag::err_objc_property_attr_mutually_exclusive)
<< "copy" << "retain";
Attributes &= ~ObjCDeclSpec::DQ_PR_retain;
}
}
// Warn if user supplied no assignment attribute, property is
// readwrite, and this is an object type.
if (!(Attributes & (ObjCDeclSpec::DQ_PR_assign | ObjCDeclSpec::DQ_PR_copy |
ObjCDeclSpec::DQ_PR_retain)) &&
!(Attributes & ObjCDeclSpec::DQ_PR_readonly) &&
Context.isObjCObjectPointerType(PropertyTy)) {
// Skip this warning in gc-only mode.
if (getLangOptions().getGCMode() != LangOptions::GCOnly)
Diag(Loc, diag::warn_objc_property_no_assignment_attribute);
// If non-gc code warn that this is likely inappropriate.
if (getLangOptions().getGCMode() == LangOptions::NonGC)
Diag(Loc, diag::warn_objc_property_default_assign_on_object);
// FIXME: Implement warning dependent on NSCopying being
// implemented. See also:
// <rdar://5168496&4855821&5607453&5096644&4947311&5698469&4947014&5168496>
// (please trim this list while you are at it).
}
}
Sema::DeclTy *Sema::ActOnProperty(Scope *S, SourceLocation AtLoc,
FieldDeclarator &FD,
ObjCDeclSpec &ODS,
Selector GetterSel,
Selector SetterSel,
DeclTy *ClassCategory,
bool *isOverridingProperty,
tok::ObjCKeywordKind MethodImplKind) {
unsigned Attributes = ODS.getPropertyAttributes();
bool isReadWrite = ((Attributes & ObjCDeclSpec::DQ_PR_readwrite) ||
// default is readwrite!
!(Attributes & ObjCDeclSpec::DQ_PR_readonly));
// property is defaulted to 'assign' if it is readwrite and is
// not retain or copy
bool isAssign = ((Attributes & ObjCDeclSpec::DQ_PR_assign) ||
(isReadWrite &&
!(Attributes & ObjCDeclSpec::DQ_PR_retain) &&
!(Attributes & ObjCDeclSpec::DQ_PR_copy)));
QualType T = GetTypeForDeclarator(FD.D, S);
Decl *ClassDecl = static_cast<Decl *>(ClassCategory);
// May modify Attributes.
CheckObjCPropertyAttributes(T, AtLoc, Attributes);
if (ObjCCategoryDecl *CDecl = dyn_cast<ObjCCategoryDecl>(ClassDecl))
if (!CDecl->getIdentifier()) {
// This is an anonymous category. property requires special
// handling.
if (ObjCInterfaceDecl *ICDecl = CDecl->getClassInterface()) {
if (ObjCPropertyDecl *PIDecl =
ICDecl->FindPropertyDeclaration(FD.D.getIdentifier())) {
// property 'PIDecl's readonly attribute will be over-ridden
// with anonymous category's readwrite property attribute!
unsigned PIkind = PIDecl->getPropertyAttributes();
if (isReadWrite && (PIkind & ObjCPropertyDecl::OBJC_PR_readonly)) {
if ((Attributes & ObjCPropertyDecl::OBJC_PR_nonatomic) !=
(PIkind & ObjCPropertyDecl::OBJC_PR_nonatomic))
Diag(AtLoc, diag::warn_property_attr_mismatch);
PIDecl->makeitReadWriteAttribute();
if (Attributes & ObjCDeclSpec::DQ_PR_retain)
PIDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_retain);
if (Attributes & ObjCDeclSpec::DQ_PR_copy)
PIDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_copy);
PIDecl->setSetterName(SetterSel);
// FIXME: use a common routine with addPropertyMethods.
ObjCMethodDecl *SetterDecl =
ObjCMethodDecl::Create(Context, AtLoc, AtLoc, SetterSel,
Context.VoidTy,
ICDecl,
true, false, true,
ObjCMethodDecl::Required);
ParmVarDecl *Argument = ParmVarDecl::Create(Context,
SetterDecl,
SourceLocation(),
FD.D.getIdentifier(),
T,
VarDecl::None,
0, 0);
SetterDecl->setMethodParams(&Argument, 1);
PIDecl->setSetterMethodDecl(SetterDecl);
}
else
Diag(AtLoc, diag::err_use_continuation_class) << ICDecl->getDeclName();
*isOverridingProperty = true;
return 0;
}
// No matching property found in the main class. Just fall thru
// and add property to the anonymous category. It looks like
// it works as is. This category becomes just like a category
// for its primary class.
} else {
Diag(CDecl->getLocation(), diag::err_continuation_class);
*isOverridingProperty = true;
return 0;
}
}
Type *t = T.getTypePtr();
if (t->isArrayType() || t->isFunctionType())
Diag(AtLoc, diag::err_property_type) << T;
ObjCPropertyDecl *PDecl = ObjCPropertyDecl::Create(Context, AtLoc,
FD.D.getIdentifier(), T);
// Regardless of setter/getter attribute, we save the default getter/setter
// selector names in anticipation of declaration of setter/getter methods.
PDecl->setGetterName(GetterSel);
PDecl->setSetterName(SetterSel);
if (Attributes & ObjCDeclSpec::DQ_PR_readonly)
PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_readonly);
if (Attributes & ObjCDeclSpec::DQ_PR_getter)
PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_getter);
if (Attributes & ObjCDeclSpec::DQ_PR_setter)
PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_setter);
if (isReadWrite)
PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_readwrite);
if (Attributes & ObjCDeclSpec::DQ_PR_retain)
PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_retain);
if (Attributes & ObjCDeclSpec::DQ_PR_copy)
PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_copy);
if (isAssign)
PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_assign);
if (Attributes & ObjCDeclSpec::DQ_PR_nonatomic)
PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_nonatomic);
if (MethodImplKind == tok::objc_required)
PDecl->setPropertyImplementation(ObjCPropertyDecl::Required);
else if (MethodImplKind == tok::objc_optional)
PDecl->setPropertyImplementation(ObjCPropertyDecl::Optional);
return PDecl;
}
/// ActOnPropertyImplDecl - This routine performs semantic checks and
/// builds the AST node for a property implementation declaration; declared
/// as @synthesize or @dynamic.
///
Sema::DeclTy *Sema::ActOnPropertyImplDecl(SourceLocation AtLoc,
SourceLocation PropertyLoc,
bool Synthesize,
DeclTy *ClassCatImpDecl,
IdentifierInfo *PropertyId,
IdentifierInfo *PropertyIvar) {
Decl *ClassImpDecl = static_cast<Decl*>(ClassCatImpDecl);
// Make sure we have a context for the property implementation declaration.
if (!ClassImpDecl) {
Diag(AtLoc, diag::error_missing_property_context);
return 0;
}
ObjCPropertyDecl *property = 0;
ObjCInterfaceDecl* IDecl = 0;
// Find the class or category class where this property must have
// a declaration.
ObjCImplementationDecl *IC = 0;
ObjCCategoryImplDecl* CatImplClass = 0;
if ((IC = dyn_cast<ObjCImplementationDecl>(ClassImpDecl))) {
IDecl = getObjCInterfaceDecl(IC->getIdentifier());
// We always synthesize an interface for an implementation
// without an interface decl. So, IDecl is always non-zero.
assert(IDecl &&
"ActOnPropertyImplDecl - @implementation without @interface");
// Look for this property declaration in the @implementation's @interface
property = IDecl->FindPropertyDeclaration(PropertyId);
if (!property) {
Diag(PropertyLoc, diag::error_bad_property_decl) << IDecl->getDeclName();
return 0;
}
}
else if ((CatImplClass = dyn_cast<ObjCCategoryImplDecl>(ClassImpDecl))) {
if (Synthesize) {
Diag(AtLoc, diag::error_synthesize_category_decl);
return 0;
}
IDecl = CatImplClass->getClassInterface();
if (!IDecl) {
Diag(AtLoc, diag::error_missing_property_interface);
return 0;
}
ObjCCategoryDecl *Category =
IDecl->FindCategoryDeclaration(CatImplClass->getIdentifier());
// If category for this implementation not found, it is an error which
// has already been reported eralier.
if (!Category)
return 0;
// Look for this property declaration in @implementation's category
property = Category->FindPropertyDeclaration(PropertyId);
if (!property) {
Diag(PropertyLoc, diag::error_bad_category_property_decl)
<< Category->getDeclName();
return 0;
}
}
else {
Diag(AtLoc, diag::error_bad_property_context);
return 0;
}
ObjCIvarDecl *Ivar = 0;
// Check that we have a valid, previously declared ivar for @synthesize
if (Synthesize) {
// @synthesize
if (!PropertyIvar)
PropertyIvar = PropertyId;
// Check that this is a previously declared 'ivar' in 'IDecl' interface
Ivar = IDecl->FindIvarDeclaration(PropertyIvar);
if (!Ivar) {
Diag(PropertyLoc, diag::error_missing_property_ivar_decl) << PropertyId;
return 0;
}
QualType PropType = Context.getCanonicalType(property->getType());
QualType IvarType = Context.getCanonicalType(Ivar->getType());
// Check that type of property and its ivar are type compatible.
if (PropType != IvarType) {
if (CheckAssignmentConstraints(PropType, IvarType) != Compatible) {
Diag(PropertyLoc, diag::error_property_ivar_type)
<< property->getDeclName() << Ivar->getDeclName();
return 0;
}
}
} else if (PropertyIvar) {
// @dynamic
Diag(PropertyLoc, diag::error_dynamic_property_ivar_decl);
return 0;
}
assert (property && "ActOnPropertyImplDecl - property declaration missing");
ObjCPropertyImplDecl *PIDecl =
ObjCPropertyImplDecl::Create(Context, AtLoc, PropertyLoc, property,
(Synthesize ?
ObjCPropertyImplDecl::Synthesize
: ObjCPropertyImplDecl::Dynamic),
Ivar);
if (IC) {
if (Synthesize)
if (ObjCPropertyImplDecl *PPIDecl =
IC->FindPropertyImplIvarDecl(PropertyIvar)) {
Diag(PropertyLoc, diag::error_duplicate_ivar_use)
<< PropertyId << PPIDecl->getPropertyDecl()->getIdentifier()
<< PropertyIvar;
Diag(PPIDecl->getLocation(), diag::note_previous_use);
}
if (ObjCPropertyImplDecl *PPIDecl = IC->FindPropertyImplDecl(PropertyId)) {
Diag(PropertyLoc, diag::error_property_implemented) << PropertyId;
Diag(PPIDecl->getLocation(), diag::note_previous_declaration);
return 0;
}
IC->addPropertyImplementation(PIDecl);
}
else {
if (Synthesize)
if (ObjCPropertyImplDecl *PPIDecl =
CatImplClass->FindPropertyImplIvarDecl(PropertyIvar)) {
Diag(PropertyLoc, diag::error_duplicate_ivar_use)
<< PropertyId << PPIDecl->getPropertyDecl()->getIdentifier()
<< PropertyIvar;
Diag(PPIDecl->getLocation(), diag::note_previous_use);
}
if (ObjCPropertyImplDecl *PPIDecl =
CatImplClass->FindPropertyImplDecl(PropertyId)) {
Diag(PropertyLoc, diag::error_property_implemented) << PropertyId;
Diag(PPIDecl->getLocation(), diag::note_previous_declaration);
return 0;
}
CatImplClass->addPropertyImplementation(PIDecl);
}
return PIDecl;
}
bool Sema::CheckObjCDeclScope(Decl *D) {
if (isa<TranslationUnitDecl>(CurContext))
return false;
Diag(D->getLocation(), diag::err_objc_decls_may_only_appear_in_global_scope);
D->setInvalidDecl();
return true;
}
/// Collect the instance variables declared in an Objective-C object. Used in
/// the creation of structures from objects using the @defs directive.
/// FIXME: This should be consolidated with CollectObjCIvars as it is also
/// part of the AST generation logic of @defs.
static void CollectIvars(ObjCInterfaceDecl *Class, RecordDecl *Record,
ASTContext& Ctx,
llvm::SmallVectorImpl<Sema::DeclTy*> &ivars) {
if (Class->getSuperClass())
CollectIvars(Class->getSuperClass(), Record, Ctx, ivars);
// For each ivar, create a fresh ObjCAtDefsFieldDecl.
for (ObjCInterfaceDecl::ivar_iterator
I=Class->ivar_begin(), E=Class->ivar_end(); I!=E; ++I) {
ObjCIvarDecl* ID = *I;
ivars.push_back(ObjCAtDefsFieldDecl::Create(Ctx, Record,
ID->getLocation(),
ID->getIdentifier(),
ID->getType(),
ID->getBitWidth()));
}
}
/// Called whenever @defs(ClassName) is encountered in the source. Inserts the
/// instance variables of ClassName into Decls.
void Sema::ActOnDefs(Scope *S, DeclTy *TagD, SourceLocation DeclStart,
IdentifierInfo *ClassName,
llvm::SmallVectorImpl<DeclTy*> &Decls) {
// Check that ClassName is a valid class
ObjCInterfaceDecl *Class = getObjCInterfaceDecl(ClassName);
if (!Class) {
Diag(DeclStart, diag::err_undef_interface) << ClassName;
return;
}
// Collect the instance variables
CollectIvars(Class, dyn_cast<RecordDecl>((Decl*)TagD), Context, Decls);
// Introduce all of these fields into the appropriate scope.
for (llvm::SmallVectorImpl<DeclTy*>::iterator D = Decls.begin();
D != Decls.end(); ++D) {
FieldDecl *FD = cast<FieldDecl>((Decl*)*D);
if (getLangOptions().CPlusPlus)
PushOnScopeChains(cast<FieldDecl>(FD), S);
else if (RecordDecl *Record = dyn_cast<RecordDecl>((Decl*)TagD))
Record->addDecl(Context, FD);
}
}