clang-1/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;
//===----------------------------------------------------------------------===//
// ObjC Decl Allocation/Deallocation Method Implementations
//===----------------------------------------------------------------------===//
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);
}
ObjCMethodDecl::~ObjCMethodDecl() {
delete [] ParamInfo;
}
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);
Decl::Destroy(C);
}
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);
}
ObjCContainerDecl::~ObjCContainerDecl() {
}
ObjCInterfaceDecl::~ObjCInterfaceDecl() {
delete [] Ivars;
// FIXME: CategoryList?
}
void ObjCInterfaceDecl::Destroy(ASTContext& C) {
for (ivar_iterator I=ivar_begin(), E=ivar_end(); I!=E; ++I)
if (*I) (*I)->Destroy(C);
// FIXME: Because there is no clear ownership
// role between ObjCInterfaceDecls and the ObjCPropertyDecls that they
// reference, we destroy ObjCPropertyDecls in ~TranslationUnit.
Decl::Destroy(C);
}
ObjCIvarDecl *ObjCIvarDecl::Create(ASTContext &C, SourceLocation L,
IdentifierInfo *Id, QualType T,
AccessControl ac, Expr *BW) {
return new (C) ObjCIvarDecl(L, Id, T, ac, BW);
}
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::Create(ASTContext &C, DeclContext *DC,
SourceLocation L,
IdentifierInfo *Id) {
return new (C) ObjCProtocolDecl(DC, L, Id);
}
ObjCProtocolDecl::~ObjCProtocolDecl() {
delete [] PropertyDecl;
}
ObjCClassDecl *ObjCClassDecl::Create(ASTContext &C, DeclContext *DC,
SourceLocation L,
ObjCInterfaceDecl **Elts, unsigned nElts) {
return new (C) ObjCClassDecl(DC, L, Elts, nElts);
}
ObjCClassDecl::~ObjCClassDecl() {
delete [] ForwardDecls;
}
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.
Decl::Destroy(C);
}
ObjCForwardProtocolDecl *
ObjCForwardProtocolDecl::Create(ASTContext &C, DeclContext *DC,
SourceLocation L,
ObjCProtocolDecl **Elts, unsigned NumElts) {
return new (C) ObjCForwardProtocolDecl(DC, L, Elts, NumElts);
}
ObjCForwardProtocolDecl::~ObjCForwardProtocolDecl() {
delete [] ReferencedProtocols;
}
ObjCCategoryDecl *ObjCCategoryDecl::Create(ASTContext &C, DeclContext *DC,
SourceLocation L,
IdentifierInfo *Id) {
return new (C) ObjCCategoryDecl(DC, L, Id);
}
ObjCCategoryImplDecl *
ObjCCategoryImplDecl::Create(ASTContext &C, DeclContext *DC,
SourceLocation L,IdentifierInfo *Id,
ObjCInterfaceDecl *ClassInterface) {
return new (C) ObjCCategoryImplDecl(DC, L, Id, ClassInterface);
}
ObjCImplementationDecl *
ObjCImplementationDecl::Create(ASTContext &C, DeclContext *DC,
SourceLocation L,
ObjCInterfaceDecl *ClassInterface,
ObjCInterfaceDecl *SuperDecl) {
return new (C) ObjCImplementationDecl(DC, L, ClassInterface, SuperDecl);
}
ObjCCompatibleAliasDecl *
ObjCCompatibleAliasDecl::Create(ASTContext &C, DeclContext *DC,
SourceLocation L,
IdentifierInfo *Id,
ObjCInterfaceDecl* AliasedClass) {
return new (C) ObjCCompatibleAliasDecl(DC, L, Id, AliasedClass);
}
ObjCPropertyDecl *ObjCPropertyDecl::Create(ASTContext &C, DeclContext *DC,
SourceLocation L,
IdentifierInfo *Id,
QualType T,
PropertyControl propControl) {
return new (C) ObjCPropertyDecl(DC, L, Id, T);
}
//===----------------------------------------------------------------------===//
// Objective-C Decl Implementation
//===----------------------------------------------------------------------===//
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());
}
void ObjCMethodDecl::setMethodParams(ParmVarDecl **NewParamInfo,
unsigned NumParams) {
assert(ParamInfo == 0 && "Already has param info!");
// Zero params -> null pointer.
if (NumParams) {
ParamInfo = new ParmVarDecl*[NumParams];
memcpy(ParamInfo, NewParamInfo, sizeof(ParmVarDecl*)*NumParams);
NumMethodParams = NumParams;
}
}
/// 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;
}
/// ObjCAddInstanceVariablesToClass - Inserts instance variables
/// into ObjCInterfaceDecl's fields.
///
void ObjCInterfaceDecl::addInstanceVariablesToClass(ObjCIvarDecl **ivars,
unsigned numIvars,
SourceLocation RBrac) {
NumIvars = numIvars;
if (numIvars) {
Ivars = new ObjCIvarDecl*[numIvars];
memcpy(Ivars, ivars, numIvars*sizeof(ObjCIvarDecl*));
}
setLocEnd(RBrac);
}
/// 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;
}
/// ObjCAddInstanceVariablesToClassImpl - Checks for correctness of Instance
/// Variables (Ivars) relative to what declared in @implementation;s class.
/// Ivars into ObjCImplementationDecl's fields.
///
void ObjCImplementationDecl::ObjCAddInstanceVariablesToClassImpl(
ObjCIvarDecl **ivars, unsigned numIvars) {
NumIvars = numIvars;
if (numIvars) {
Ivars = new ObjCIvarDecl*[numIvars];
memcpy(Ivars, ivars, numIvars*sizeof(ObjCIvarDecl*));
}
}
// 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;
}
unsigned ObjCContainerDecl::getNumInstanceMethods() const {
unsigned sum = 0;
for (instmeth_iterator I=instmeth_begin(), E=instmeth_end(); I != E; ++I)
sum++;
return sum;
}
unsigned ObjCContainerDecl::getNumClassMethods() const {
unsigned sum = 0;
for (classmeth_iterator I=classmeth_begin(), E=classmeth_end(); I != E; ++I)
sum++;
return sum;
}
unsigned ObjCContainerDecl::getNumProperties() const {
unsigned sum = 0;
for (prop_iterator I=prop_begin(), E=prop_end(); I != E; ++I)
sum++;
return sum;
}
/// 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) {
ObjCPropertyDecl *property = *I;
if (property->getIdentifier() == PropertyId)
return property;
}
const ObjCProtocolDecl *PID = dyn_cast<ObjCProtocolDecl>(this);
if (PID) {
for (ObjCProtocolDecl::protocol_iterator P = PID->protocol_begin(),
E = PID->protocol_end();
P != E; ++P)
if (ObjCPropertyDecl *property =
(*P)->FindPropertyDeclaration(PropertyId))
return property;
}
if (const ObjCInterfaceDecl *OID = dyn_cast<ObjCInterfaceDecl>(this)) {
// Look through categories.
for (ObjCCategoryDecl *Category = OID->getCategoryList();
Category; Category = Category->getNextClassCategory()) {
ObjCPropertyDecl *property = Category->FindPropertyDeclaration(PropertyId);
if (property)
return property;
}
// Look through protocols.
for (ObjCInterfaceDecl::protocol_iterator I = OID->protocol_begin(),
E = OID->protocol_end(); I != E; ++I) {
ObjCProtocolDecl *Protocol = *I;
ObjCPropertyDecl *property = Protocol->FindPropertyDeclaration(PropertyId);
if (property)
return property;
}
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) {
ObjCProtocolDecl *Protocol = *I;
ObjCPropertyDecl *property = Protocol->FindPropertyDeclaration(PropertyId);
if (property)
return property;
}
}
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;
}
/// 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
/// properties implemented in this @implementation block and returns the
/// implemented property that uses it.
///
ObjCPropertyImplDecl *ObjCImplementationDecl::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;
}
/// 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;
}
// 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;
}
/// 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;
}
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);
}