llvm-project/clang/lib/AST/DeclObjC.cpp

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//===--- DeclObjC.cpp - ObjC Declaration AST Node Implementation ----------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the Objective-C related Decl classes.
//
//===----------------------------------------------------------------------===//
#include "clang/AST/DeclObjC.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/Stmt.h"
using namespace clang;
//===----------------------------------------------------------------------===//
// ObjCListBase
//===----------------------------------------------------------------------===//
void ObjCListBase::Destroy(ASTContext &Ctx) {
Ctx.Deallocate(List);
NumElts = 0;
List = 0;
}
void ObjCListBase::set(void *const* InList, unsigned Elts, ASTContext &Ctx) {
assert(List == 0 && "Elements already set!");
if (Elts == 0) return; // Setting to an empty list is a noop.
List = new (Ctx) void*[Elts];
NumElts = Elts;
memcpy(List, InList, sizeof(void*)*Elts);
}
//===----------------------------------------------------------------------===//
// ObjCInterfaceDecl
//===----------------------------------------------------------------------===//
// Get the local instance method declared in this interface.
// FIXME: handle overloading, instance & class methods can have the same name.
ObjCMethodDecl *ObjCContainerDecl::getInstanceMethod(Selector Sel) const {
lookup_const_result MethodResult = lookup(Sel);
if (MethodResult.first)
return const_cast<ObjCMethodDecl*>(
dyn_cast<ObjCMethodDecl>(*MethodResult.first));
return 0;
}
// Get the local class method declared in this interface.
ObjCMethodDecl *ObjCContainerDecl::getClassMethod(Selector Sel) const {
lookup_const_result MethodResult = lookup(Sel);
if (MethodResult.first)
return const_cast<ObjCMethodDecl*>(
dyn_cast<ObjCMethodDecl>(*MethodResult.first));
return 0;
}
/// FindPropertyDeclaration - Finds declaration of the property given its name
/// in 'PropertyId' and returns it. It returns 0, if not found.
/// FIXME: Convert to DeclContext lookup...
///
ObjCPropertyDecl *
ObjCContainerDecl::FindPropertyDeclaration(IdentifierInfo *PropertyId) const {
for (prop_iterator I = prop_begin(), E = prop_end(); I != E; ++I)
if ((*I)->getIdentifier() == PropertyId)
return *I;
const ObjCProtocolDecl *PID = dyn_cast<ObjCProtocolDecl>(this);
if (PID) {
for (ObjCProtocolDecl::protocol_iterator I = PID->protocol_begin(),
E = PID->protocol_end(); I != E; ++I)
if (ObjCPropertyDecl *P = (*I)->FindPropertyDeclaration(PropertyId))
return P;
}
if (const ObjCInterfaceDecl *OID = dyn_cast<ObjCInterfaceDecl>(this)) {
// Look through categories.
for (ObjCCategoryDecl *Category = OID->getCategoryList();
Category; Category = Category->getNextClassCategory()) {
if (ObjCPropertyDecl *P = Category->FindPropertyDeclaration(PropertyId))
return P;
}
// Look through protocols.
for (ObjCInterfaceDecl::protocol_iterator I = OID->protocol_begin(),
E = OID->protocol_end(); I != E; ++I) {
if (ObjCPropertyDecl *P = (*I)->FindPropertyDeclaration(PropertyId))
return P;
}
if (OID->getSuperClass())
return OID->getSuperClass()->FindPropertyDeclaration(PropertyId);
} else if (const ObjCCategoryDecl *OCD = dyn_cast<ObjCCategoryDecl>(this)) {
// Look through protocols.
for (ObjCInterfaceDecl::protocol_iterator I = OCD->protocol_begin(),
E = OCD->protocol_end(); I != E; ++I) {
if (ObjCPropertyDecl *P = (*I)->FindPropertyDeclaration(PropertyId))
return P;
}
}
return 0;
}
ObjCIvarDecl *ObjCInterfaceDecl::lookupInstanceVariable(
IdentifierInfo *ID, ObjCInterfaceDecl *&clsDeclared) {
ObjCInterfaceDecl* ClassDecl = this;
while (ClassDecl != NULL) {
for (ivar_iterator I = ClassDecl->ivar_begin(), E = ClassDecl->ivar_end();
I != E; ++I) {
if ((*I)->getIdentifier() == ID) {
clsDeclared = ClassDecl;
return *I;
}
}
ClassDecl = ClassDecl->getSuperClass();
}
return NULL;
}
/// lookupInstanceMethod - This method returns an instance method by looking in
/// the class, its categories, and its super classes (using a linear search).
ObjCMethodDecl *ObjCInterfaceDecl::lookupInstanceMethod(Selector Sel) {
ObjCInterfaceDecl* ClassDecl = this;
ObjCMethodDecl *MethodDecl = 0;
while (ClassDecl != NULL) {
if ((MethodDecl = ClassDecl->getInstanceMethod(Sel)))
return MethodDecl;
// Didn't find one yet - look through protocols.
const ObjCList<ObjCProtocolDecl> &Protocols =
ClassDecl->getReferencedProtocols();
for (ObjCList<ObjCProtocolDecl>::iterator I = Protocols.begin(),
E = Protocols.end(); I != E; ++I)
if ((MethodDecl = (*I)->getInstanceMethod(Sel)))
return MethodDecl;
// Didn't find one yet - now look through categories.
ObjCCategoryDecl *CatDecl = ClassDecl->getCategoryList();
while (CatDecl) {
if ((MethodDecl = CatDecl->getInstanceMethod(Sel)))
return MethodDecl;
// Didn't find one yet - look through protocols.
const ObjCList<ObjCProtocolDecl> &Protocols =
CatDecl->getReferencedProtocols();
for (ObjCList<ObjCProtocolDecl>::iterator I = Protocols.begin(),
E = Protocols.end(); I != E; ++I)
if ((MethodDecl = (*I)->getInstanceMethod(Sel)))
return MethodDecl;
CatDecl = CatDecl->getNextClassCategory();
}
ClassDecl = ClassDecl->getSuperClass();
}
return NULL;
}
// lookupClassMethod - This method returns a class method by looking in the
// class, its categories, and its super classes (using a linear search).
ObjCMethodDecl *ObjCInterfaceDecl::lookupClassMethod(Selector Sel) {
ObjCInterfaceDecl* ClassDecl = this;
ObjCMethodDecl *MethodDecl = 0;
while (ClassDecl != NULL) {
if ((MethodDecl = ClassDecl->getClassMethod(Sel)))
return MethodDecl;
// Didn't find one yet - look through protocols.
for (ObjCInterfaceDecl::protocol_iterator I = ClassDecl->protocol_begin(),
E = ClassDecl->protocol_end(); I != E; ++I)
if ((MethodDecl = (*I)->getClassMethod(Sel)))
return MethodDecl;
// Didn't find one yet - now look through categories.
ObjCCategoryDecl *CatDecl = ClassDecl->getCategoryList();
while (CatDecl) {
if ((MethodDecl = CatDecl->getClassMethod(Sel)))
return MethodDecl;
CatDecl = CatDecl->getNextClassCategory();
}
ClassDecl = ClassDecl->getSuperClass();
}
return NULL;
}
//===----------------------------------------------------------------------===//
// ObjCMethodDecl
//===----------------------------------------------------------------------===//
ObjCMethodDecl *ObjCMethodDecl::Create(ASTContext &C,
SourceLocation beginLoc,
SourceLocation endLoc,
Selector SelInfo, QualType T,
DeclContext *contextDecl,
bool isInstance,
bool isVariadic,
bool isSynthesized,
ImplementationControl impControl) {
return new (C) ObjCMethodDecl(beginLoc, endLoc,
SelInfo, T, contextDecl,
isInstance,
isVariadic, isSynthesized, impControl);
}
void ObjCMethodDecl::Destroy(ASTContext &C) {
if (Body) Body->Destroy(C);
if (SelfDecl) SelfDecl->Destroy(C);
for (param_iterator I=param_begin(), E=param_end(); I!=E; ++I)
if (*I) (*I)->Destroy(C);
ParamInfo.Destroy(C);
Decl::Destroy(C);
}
void ObjCMethodDecl::createImplicitParams(ASTContext &Context,
const ObjCInterfaceDecl *OID) {
QualType selfTy;
if (isInstanceMethod()) {
// There may be no interface context due to error in declaration
// of the interface (which has been reported). Recover gracefully.
if (OID) {
selfTy =Context.getObjCInterfaceType(const_cast<ObjCInterfaceDecl*>(OID));
selfTy = Context.getPointerType(selfTy);
} else {
selfTy = Context.getObjCIdType();
}
} else // we have a factory method.
selfTy = Context.getObjCClassType();
SelfDecl = ImplicitParamDecl::Create(Context, this, SourceLocation(),
&Context.Idents.get("self"), selfTy);
CmdDecl = ImplicitParamDecl::Create(Context, this, SourceLocation(),
&Context.Idents.get("_cmd"),
Context.getObjCSelType());
}
/// getSynthesizedMethodSize - Compute size of synthesized method name
/// as done be the rewrite.
///
unsigned ObjCMethodDecl::getSynthesizedMethodSize() const {
// syntesized method name is a concatenation of -/+[class-name selector]
// Get length of this name.
unsigned length = 3; // _I_ or _C_
length += getClassInterface()->getNameAsString().size()+1; // extra for _
if (const ObjCCategoryImplDecl *CID =
dyn_cast<ObjCCategoryImplDecl>(getDeclContext()))
length += CID->getNameAsString().size()+1;
length += getSelector().getAsString().size(); // selector name
return length;
}
ObjCInterfaceDecl *ObjCMethodDecl::getClassInterface() {
if (ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(getDeclContext()))
return ID;
if (ObjCCategoryDecl *CD = dyn_cast<ObjCCategoryDecl>(getDeclContext()))
return CD->getClassInterface();
if (ObjCImplementationDecl *IMD =
dyn_cast<ObjCImplementationDecl>(getDeclContext()))
return IMD->getClassInterface();
if (ObjCCategoryImplDecl *CID =
dyn_cast<ObjCCategoryImplDecl>(getDeclContext()))
return CID->getClassInterface();
assert(false && "unknown method context");
return 0;
}
//===----------------------------------------------------------------------===//
// ObjCInterfaceDecl
//===----------------------------------------------------------------------===//
ObjCInterfaceDecl *ObjCInterfaceDecl::Create(ASTContext &C,
DeclContext *DC,
SourceLocation atLoc,
IdentifierInfo *Id,
SourceLocation ClassLoc,
bool ForwardDecl, bool isInternal){
return new (C) ObjCInterfaceDecl(DC, atLoc, Id, ClassLoc, ForwardDecl,
isInternal);
}
ObjCInterfaceDecl::
ObjCInterfaceDecl(DeclContext *DC, SourceLocation atLoc, IdentifierInfo *Id,
SourceLocation CLoc, bool FD, bool isInternal)
: ObjCContainerDecl(ObjCInterface, DC, atLoc, Id),
TypeForDecl(0), SuperClass(0),
CategoryList(0), ForwardDecl(FD), InternalInterface(isInternal),
ClassLoc(CLoc) {
}
void ObjCInterfaceDecl::Destroy(ASTContext &C) {
for (ivar_iterator I=ivar_begin(), E=ivar_end(); I!=E; ++I)
if (*I) (*I)->Destroy(C);
IVars.Destroy(C);
// FIXME: CategoryList?
// FIXME: Because there is no clear ownership
// role between ObjCInterfaceDecls and the ObjCPropertyDecls that they
// reference, we destroy ObjCPropertyDecls in ~TranslationUnit.
Decl::Destroy(C);
}
/// FindCategoryDeclaration - Finds category declaration in the list of
/// categories for this class and returns it. Name of the category is passed
/// in 'CategoryId'. If category not found, return 0;
///
ObjCCategoryDecl *
ObjCInterfaceDecl::FindCategoryDeclaration(IdentifierInfo *CategoryId) const {
for (ObjCCategoryDecl *Category = getCategoryList();
Category; Category = Category->getNextClassCategory())
if (Category->getIdentifier() == CategoryId)
return Category;
return 0;
}
/// lookupFieldDeclForIvar - looks up a field decl' in the laid out
/// storage which matches this 'ivar'.
///
FieldDecl *ObjCInterfaceDecl::lookupFieldDeclForIvar(ASTContext &Context,
const ObjCIvarDecl *IVar) {
const RecordDecl *RecordForDecl = Context.addRecordToClass(this);
assert(RecordForDecl && "lookupFieldDeclForIvar no storage for class");
DeclarationName Member = IVar->getDeclName();
DeclContext::lookup_result Lookup =
(const_cast< RecordDecl *>(RecordForDecl))->lookup(Member);
assert((Lookup.first != Lookup.second) && "field decl not found");
FieldDecl *MemberDecl = dyn_cast<FieldDecl>(*Lookup.first);
assert(MemberDecl && "field decl not found");
return MemberDecl;
}
//===----------------------------------------------------------------------===//
// ObjCIvarDecl
//===----------------------------------------------------------------------===//
ObjCIvarDecl *ObjCIvarDecl::Create(ASTContext &C, DeclContext *DC,
SourceLocation L, IdentifierInfo *Id,
QualType T, AccessControl ac, Expr *BW) {
return new (C) ObjCIvarDecl(DC, L, Id, T, ac, BW);
}
//===----------------------------------------------------------------------===//
// ObjCAtDefsFieldDecl
//===----------------------------------------------------------------------===//
ObjCAtDefsFieldDecl
*ObjCAtDefsFieldDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation L,
IdentifierInfo *Id, QualType T, Expr *BW) {
return new (C) ObjCAtDefsFieldDecl(DC, L, Id, T, BW);
}
void ObjCAtDefsFieldDecl::Destroy(ASTContext& C) {
this->~ObjCAtDefsFieldDecl();
C.Deallocate((void *)this);
}
//===----------------------------------------------------------------------===//
// ObjCProtocolDecl
//===----------------------------------------------------------------------===//
ObjCProtocolDecl *ObjCProtocolDecl::Create(ASTContext &C, DeclContext *DC,
SourceLocation L,
IdentifierInfo *Id) {
return new (C) ObjCProtocolDecl(DC, L, Id);
}
void ObjCProtocolDecl::Destroy(ASTContext &C) {
ReferencedProtocols.Destroy(C);
ObjCContainerDecl::Destroy(C);
}
// lookupInstanceMethod - Lookup a instance method in the protocol and protocols
// it inherited.
ObjCMethodDecl *ObjCProtocolDecl::lookupInstanceMethod(Selector Sel) {
ObjCMethodDecl *MethodDecl = NULL;
if ((MethodDecl = getInstanceMethod(Sel)))
return MethodDecl;
for (protocol_iterator I = protocol_begin(), E = protocol_end(); I != E; ++I)
if ((MethodDecl = (*I)->lookupInstanceMethod(Sel)))
return MethodDecl;
return NULL;
}
// lookupInstanceMethod - Lookup a class method in the protocol and protocols
// it inherited.
ObjCMethodDecl *ObjCProtocolDecl::lookupClassMethod(Selector Sel) {
ObjCMethodDecl *MethodDecl = NULL;
if ((MethodDecl = getClassMethod(Sel)))
return MethodDecl;
for (protocol_iterator I = protocol_begin(), E = protocol_end(); I != E; ++I)
if ((MethodDecl = (*I)->lookupClassMethod(Sel)))
return MethodDecl;
return NULL;
}
//===----------------------------------------------------------------------===//
// ObjCClassDecl
//===----------------------------------------------------------------------===//
ObjCClassDecl::ObjCClassDecl(DeclContext *DC, SourceLocation L,
ObjCInterfaceDecl *const *Elts, unsigned nElts,
ASTContext &C)
: Decl(ObjCClass, DC, L) {
ForwardDecls.set(Elts, nElts, C);
}
ObjCClassDecl *ObjCClassDecl::Create(ASTContext &C, DeclContext *DC,
SourceLocation L,
ObjCInterfaceDecl *const *Elts,
unsigned nElts) {
return new (C) ObjCClassDecl(DC, L, Elts, nElts, C);
}
void ObjCClassDecl::Destroy(ASTContext &C) {
// FIXME: There is no clear ownership policy now for referenced
// ObjCInterfaceDecls. Some of them can be forward declarations that
// are never later defined (in which case the ObjCClassDecl owns them)
// or the ObjCInterfaceDecl later becomes a real definition later. Ideally
// we should have separate objects for forward declarations and definitions,
// obviating this problem. Because of this situation, referenced
// ObjCInterfaceDecls are destroyed in ~TranslationUnit.
ForwardDecls.Destroy(C);
Decl::Destroy(C);
}
//===----------------------------------------------------------------------===//
// ObjCForwardProtocolDecl
//===----------------------------------------------------------------------===//
ObjCForwardProtocolDecl::
ObjCForwardProtocolDecl(DeclContext *DC, SourceLocation L,
ObjCProtocolDecl *const *Elts, unsigned nElts,
ASTContext &C)
: Decl(ObjCForwardProtocol, DC, L) {
ReferencedProtocols.set(Elts, nElts, C);
}
ObjCForwardProtocolDecl *
ObjCForwardProtocolDecl::Create(ASTContext &C, DeclContext *DC,
SourceLocation L,
ObjCProtocolDecl *const *Elts,
unsigned NumElts) {
return new (C) ObjCForwardProtocolDecl(DC, L, Elts, NumElts, C);
}
void ObjCForwardProtocolDecl::Destroy(ASTContext &C) {
ReferencedProtocols.Destroy(C);
Decl::Destroy(C);
}
//===----------------------------------------------------------------------===//
// ObjCCategoryDecl
//===----------------------------------------------------------------------===//
ObjCCategoryDecl *ObjCCategoryDecl::Create(ASTContext &C, DeclContext *DC,
SourceLocation L,
IdentifierInfo *Id) {
return new (C) ObjCCategoryDecl(DC, L, Id);
}
//===----------------------------------------------------------------------===//
// ObjCCategoryImplDecl
//===----------------------------------------------------------------------===//
ObjCCategoryImplDecl *
ObjCCategoryImplDecl::Create(ASTContext &C, DeclContext *DC,
SourceLocation L,IdentifierInfo *Id,
ObjCInterfaceDecl *ClassInterface) {
return new (C) ObjCCategoryImplDecl(DC, L, Id, ClassInterface);
}
/// FindPropertyImplIvarDecl - This method lookup the ivar in the list of
/// properties implemented in this category @implementation block and returns
/// the implemented property that uses it.
///
ObjCPropertyImplDecl *ObjCCategoryImplDecl::
FindPropertyImplIvarDecl(IdentifierInfo *ivarId) const {
for (propimpl_iterator i = propimpl_begin(), e = propimpl_end(); i != e; ++i){
ObjCPropertyImplDecl *PID = *i;
if (PID->getPropertyIvarDecl() &&
PID->getPropertyIvarDecl()->getIdentifier() == ivarId)
return PID;
}
return 0;
}
/// FindPropertyImplDecl - This method looks up a previous ObjCPropertyImplDecl
/// added to the list of those properties @synthesized/@dynamic in this
/// category @implementation block.
///
ObjCPropertyImplDecl *ObjCCategoryImplDecl::
FindPropertyImplDecl(IdentifierInfo *Id) const {
for (propimpl_iterator i = propimpl_begin(), e = propimpl_end(); i != e; ++i){
ObjCPropertyImplDecl *PID = *i;
if (PID->getPropertyDecl()->getIdentifier() == Id)
return PID;
}
return 0;
}
// lookupInstanceMethod - This method returns an instance method by looking in
// the class implementation. Unlike interfaces, we don't look outside the
// implementation.
ObjCMethodDecl *ObjCCategoryImplDecl::getInstanceMethod(Selector Sel) const {
for (instmeth_iterator I = instmeth_begin(), E = instmeth_end(); I != E; ++I)
if ((*I)->getSelector() == Sel)
return *I;
return NULL;
}
// lookupClassMethod - This method returns an instance method by looking in
// the class implementation. Unlike interfaces, we don't look outside the
// implementation.
ObjCMethodDecl *ObjCCategoryImplDecl::getClassMethod(Selector Sel) const {
for (classmeth_iterator I = classmeth_begin(), E = classmeth_end();
I != E; ++I)
if ((*I)->getSelector() == Sel)
return *I;
return NULL;
}
//===----------------------------------------------------------------------===//
// ObjCImplementationDecl
//===----------------------------------------------------------------------===//
ObjCImplementationDecl *
ObjCImplementationDecl::Create(ASTContext &C, DeclContext *DC,
SourceLocation L,
ObjCInterfaceDecl *ClassInterface,
ObjCInterfaceDecl *SuperDecl) {
return new (C) ObjCImplementationDecl(DC, L, ClassInterface, SuperDecl);
}
/// Destroy - Call destructors and release memory.
void ObjCImplementationDecl::Destroy(ASTContext &C) {
IVars.Destroy(C);
Decl::Destroy(C);
}
/// getInstanceMethod - This method returns an instance method by
/// looking in the class implementation. Unlike interfaces, we don't
/// look outside the implementation.
ObjCMethodDecl *ObjCImplementationDecl::getInstanceMethod(Selector Sel) const {
for (instmeth_iterator I = instmeth_begin(), E = instmeth_end(); I != E; ++I)
if ((*I)->getSelector() == Sel)
return *I;
return NULL;
}
/// getClassMethod - This method returns a class method by looking in
/// the class implementation. Unlike interfaces, we don't look outside
/// the implementation.
ObjCMethodDecl *ObjCImplementationDecl::getClassMethod(Selector Sel) const {
for (classmeth_iterator I = classmeth_begin(), E = classmeth_end();
I != E; ++I)
if ((*I)->getSelector() == Sel)
return *I;
return NULL;
}
/// FindPropertyImplDecl - This method looks up a previous ObjCPropertyImplDecl
/// added to the list of those properties @synthesized/@dynamic in this
/// @implementation block.
///
ObjCPropertyImplDecl *ObjCImplementationDecl::
FindPropertyImplDecl(IdentifierInfo *Id) const {
for (propimpl_iterator i = propimpl_begin(), e = propimpl_end(); i != e; ++i){
ObjCPropertyImplDecl *PID = *i;
if (PID->getPropertyDecl()->getIdentifier() == Id)
return PID;
}
return 0;
}
/// FindPropertyImplIvarDecl - This method lookup the ivar in the list of
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/// properties implemented in this @implementation block and returns the
/// implemented property that uses it.
///
ObjCPropertyImplDecl *ObjCImplementationDecl::
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FindPropertyImplIvarDecl(IdentifierInfo *ivarId) const {
for (propimpl_iterator i = propimpl_begin(), e = propimpl_end(); i != e; ++i){
ObjCPropertyImplDecl *PID = *i;
if (PID->getPropertyIvarDecl() &&
PID->getPropertyIvarDecl()->getIdentifier() == ivarId)
return PID;
}
return 0;
}
//===----------------------------------------------------------------------===//
// ObjCCompatibleAliasDecl
//===----------------------------------------------------------------------===//
ObjCCompatibleAliasDecl *
ObjCCompatibleAliasDecl::Create(ASTContext &C, DeclContext *DC,
SourceLocation L,
IdentifierInfo *Id,
ObjCInterfaceDecl* AliasedClass) {
return new (C) ObjCCompatibleAliasDecl(DC, L, Id, AliasedClass);
}
//===----------------------------------------------------------------------===//
// ObjCPropertyDecl
//===----------------------------------------------------------------------===//
ObjCPropertyDecl *ObjCPropertyDecl::Create(ASTContext &C, DeclContext *DC,
SourceLocation L,
IdentifierInfo *Id,
QualType T,
PropertyControl propControl) {
return new (C) ObjCPropertyDecl(DC, L, Id, T);
}
//===----------------------------------------------------------------------===//
// ObjCPropertyImplDecl
//===----------------------------------------------------------------------===//
ObjCPropertyImplDecl *ObjCPropertyImplDecl::Create(ASTContext &C,
DeclContext *DC,
SourceLocation atLoc,
SourceLocation L,
ObjCPropertyDecl *property,
Kind PK,
ObjCIvarDecl *ivar) {
return new (C) ObjCPropertyImplDecl(DC, atLoc, L, property, PK, ivar);
}