1854 lines
75 KiB
C++
1854 lines
75 KiB
C++
//===--- SemaDeclObjC.cpp - Semantic Analysis for ObjC Declarations -------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements semantic analysis for Objective C declarations.
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//
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//===----------------------------------------------------------------------===//
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#include "Sema.h"
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#include "Lookup.h"
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#include "clang/Sema/ExternalSemaSource.h"
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#include "clang/AST/Expr.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/DeclObjC.h"
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#include "clang/Parse/DeclSpec.h"
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using namespace clang;
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/// ActOnStartOfObjCMethodDef - This routine sets up parameters; invisible
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/// and user declared, in the method definition's AST.
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void Sema::ActOnStartOfObjCMethodDef(Scope *FnBodyScope, DeclPtrTy D) {
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assert(getCurMethodDecl() == 0 && "Method parsing confused");
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ObjCMethodDecl *MDecl = dyn_cast_or_null<ObjCMethodDecl>(D.getAs<Decl>());
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// If we don't have a valid method decl, simply return.
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if (!MDecl)
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return;
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// Allow the rest of sema to find private method decl implementations.
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if (MDecl->isInstanceMethod())
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AddInstanceMethodToGlobalPool(MDecl);
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else
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AddFactoryMethodToGlobalPool(MDecl);
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// Allow all of Sema to see that we are entering a method definition.
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PushDeclContext(FnBodyScope, MDecl);
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PushFunctionScope();
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// Create Decl objects for each parameter, entrring them in the scope for
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// binding to their use.
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// Insert the invisible arguments, self and _cmd!
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MDecl->createImplicitParams(Context, MDecl->getClassInterface());
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PushOnScopeChains(MDecl->getSelfDecl(), FnBodyScope);
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PushOnScopeChains(MDecl->getCmdDecl(), FnBodyScope);
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// Introduce all of the other parameters into this scope.
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for (ObjCMethodDecl::param_iterator PI = MDecl->param_begin(),
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E = MDecl->param_end(); PI != E; ++PI)
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if ((*PI)->getIdentifier())
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PushOnScopeChains(*PI, FnBodyScope);
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}
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Sema::DeclPtrTy Sema::
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ActOnStartClassInterface(SourceLocation AtInterfaceLoc,
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IdentifierInfo *ClassName, SourceLocation ClassLoc,
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IdentifierInfo *SuperName, SourceLocation SuperLoc,
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const DeclPtrTy *ProtoRefs, unsigned NumProtoRefs,
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const SourceLocation *ProtoLocs,
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SourceLocation EndProtoLoc, AttributeList *AttrList) {
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assert(ClassName && "Missing class identifier");
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// Check for another declaration kind with the same name.
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NamedDecl *PrevDecl = LookupSingleName(TUScope, ClassName, ClassLoc,
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LookupOrdinaryName, ForRedeclaration);
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if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) {
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Diag(ClassLoc, diag::err_redefinition_different_kind) << ClassName;
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Diag(PrevDecl->getLocation(), diag::note_previous_definition);
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}
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ObjCInterfaceDecl* IDecl = dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl);
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if (IDecl) {
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// Class already seen. Is it a forward declaration?
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if (!IDecl->isForwardDecl()) {
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IDecl->setInvalidDecl();
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Diag(AtInterfaceLoc, diag::err_duplicate_class_def)<<IDecl->getDeclName();
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Diag(IDecl->getLocation(), diag::note_previous_definition);
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// Return the previous class interface.
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// FIXME: don't leak the objects passed in!
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return DeclPtrTy::make(IDecl);
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} else {
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IDecl->setLocation(AtInterfaceLoc);
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IDecl->setForwardDecl(false);
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IDecl->setClassLoc(ClassLoc);
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// Since this ObjCInterfaceDecl was created by a forward declaration,
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// we now add it to the DeclContext since it wasn't added before
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// (see ActOnForwardClassDeclaration).
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IDecl->setLexicalDeclContext(CurContext);
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CurContext->addDecl(IDecl);
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if (AttrList)
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ProcessDeclAttributeList(TUScope, IDecl, AttrList);
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}
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} else {
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IDecl = ObjCInterfaceDecl::Create(Context, CurContext, AtInterfaceLoc,
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ClassName, ClassLoc);
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if (AttrList)
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ProcessDeclAttributeList(TUScope, IDecl, AttrList);
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PushOnScopeChains(IDecl, TUScope);
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}
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if (SuperName) {
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// Check if a different kind of symbol declared in this scope.
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PrevDecl = LookupSingleName(TUScope, SuperName, SuperLoc,
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LookupOrdinaryName);
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if (!PrevDecl) {
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// Try to correct for a typo in the superclass name.
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LookupResult R(*this, SuperName, SuperLoc, LookupOrdinaryName);
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if (CorrectTypo(R, TUScope, 0, 0, false, CTC_NoKeywords) &&
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(PrevDecl = R.getAsSingle<ObjCInterfaceDecl>())) {
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Diag(SuperLoc, diag::err_undef_superclass_suggest)
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<< SuperName << ClassName << PrevDecl->getDeclName();
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Diag(PrevDecl->getLocation(), diag::note_previous_decl)
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<< PrevDecl->getDeclName();
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}
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}
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if (PrevDecl == IDecl) {
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Diag(SuperLoc, diag::err_recursive_superclass)
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<< SuperName << ClassName << SourceRange(AtInterfaceLoc, ClassLoc);
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IDecl->setLocEnd(ClassLoc);
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} else {
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ObjCInterfaceDecl *SuperClassDecl =
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dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl);
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// Diagnose classes that inherit from deprecated classes.
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if (SuperClassDecl)
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(void)DiagnoseUseOfDecl(SuperClassDecl, SuperLoc);
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if (PrevDecl && SuperClassDecl == 0) {
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// The previous declaration was not a class decl. Check if we have a
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// typedef. If we do, get the underlying class type.
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if (const TypedefDecl *TDecl = dyn_cast_or_null<TypedefDecl>(PrevDecl)) {
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QualType T = TDecl->getUnderlyingType();
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if (T->isObjCInterfaceType()) {
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if (NamedDecl *IDecl = T->getAs<ObjCInterfaceType>()->getDecl())
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SuperClassDecl = dyn_cast<ObjCInterfaceDecl>(IDecl);
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}
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}
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// This handles the following case:
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//
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// typedef int SuperClass;
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// @interface MyClass : SuperClass {} @end
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//
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if (!SuperClassDecl) {
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Diag(SuperLoc, diag::err_redefinition_different_kind) << SuperName;
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Diag(PrevDecl->getLocation(), diag::note_previous_definition);
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}
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}
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if (!dyn_cast_or_null<TypedefDecl>(PrevDecl)) {
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if (!SuperClassDecl)
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Diag(SuperLoc, diag::err_undef_superclass)
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<< SuperName << ClassName << SourceRange(AtInterfaceLoc, ClassLoc);
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else if (SuperClassDecl->isForwardDecl())
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Diag(SuperLoc, diag::err_undef_superclass)
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<< SuperClassDecl->getDeclName() << ClassName
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<< SourceRange(AtInterfaceLoc, ClassLoc);
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}
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IDecl->setSuperClass(SuperClassDecl);
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IDecl->setSuperClassLoc(SuperLoc);
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IDecl->setLocEnd(SuperLoc);
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}
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} else { // we have a root class.
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IDecl->setLocEnd(ClassLoc);
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}
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/// Check then save referenced protocols.
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if (NumProtoRefs) {
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IDecl->setProtocolList((ObjCProtocolDecl**)ProtoRefs, NumProtoRefs,
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ProtoLocs, Context);
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IDecl->setLocEnd(EndProtoLoc);
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}
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CheckObjCDeclScope(IDecl);
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return DeclPtrTy::make(IDecl);
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}
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/// ActOnCompatiblityAlias - this action is called after complete parsing of
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/// @compatibility_alias declaration. It sets up the alias relationships.
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Sema::DeclPtrTy Sema::ActOnCompatiblityAlias(SourceLocation AtLoc,
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IdentifierInfo *AliasName,
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SourceLocation AliasLocation,
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IdentifierInfo *ClassName,
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SourceLocation ClassLocation) {
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// Look for previous declaration of alias name
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NamedDecl *ADecl = LookupSingleName(TUScope, AliasName, AliasLocation,
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LookupOrdinaryName, ForRedeclaration);
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if (ADecl) {
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if (isa<ObjCCompatibleAliasDecl>(ADecl))
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Diag(AliasLocation, diag::warn_previous_alias_decl);
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else
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Diag(AliasLocation, diag::err_conflicting_aliasing_type) << AliasName;
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Diag(ADecl->getLocation(), diag::note_previous_declaration);
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return DeclPtrTy();
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}
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// Check for class declaration
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NamedDecl *CDeclU = LookupSingleName(TUScope, ClassName, ClassLocation,
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LookupOrdinaryName, ForRedeclaration);
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if (const TypedefDecl *TDecl = dyn_cast_or_null<TypedefDecl>(CDeclU)) {
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QualType T = TDecl->getUnderlyingType();
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if (T->isObjCInterfaceType()) {
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if (NamedDecl *IDecl = T->getAs<ObjCInterfaceType>()->getDecl()) {
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ClassName = IDecl->getIdentifier();
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CDeclU = LookupSingleName(TUScope, ClassName, ClassLocation,
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LookupOrdinaryName, ForRedeclaration);
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}
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}
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}
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ObjCInterfaceDecl *CDecl = dyn_cast_or_null<ObjCInterfaceDecl>(CDeclU);
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if (CDecl == 0) {
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Diag(ClassLocation, diag::warn_undef_interface) << ClassName;
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if (CDeclU)
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Diag(CDeclU->getLocation(), diag::note_previous_declaration);
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return DeclPtrTy();
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}
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// Everything checked out, instantiate a new alias declaration AST.
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ObjCCompatibleAliasDecl *AliasDecl =
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ObjCCompatibleAliasDecl::Create(Context, CurContext, AtLoc, AliasName, CDecl);
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if (!CheckObjCDeclScope(AliasDecl))
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PushOnScopeChains(AliasDecl, TUScope);
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return DeclPtrTy::make(AliasDecl);
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}
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void Sema::CheckForwardProtocolDeclarationForCircularDependency(
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IdentifierInfo *PName,
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SourceLocation &Ploc, SourceLocation PrevLoc,
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const ObjCList<ObjCProtocolDecl> &PList) {
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for (ObjCList<ObjCProtocolDecl>::iterator I = PList.begin(),
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E = PList.end(); I != E; ++I) {
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if (ObjCProtocolDecl *PDecl = LookupProtocol((*I)->getIdentifier(),
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Ploc)) {
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if (PDecl->getIdentifier() == PName) {
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Diag(Ploc, diag::err_protocol_has_circular_dependency);
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Diag(PrevLoc, diag::note_previous_definition);
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}
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CheckForwardProtocolDeclarationForCircularDependency(PName, Ploc,
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PDecl->getLocation(), PDecl->getReferencedProtocols());
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}
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}
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}
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Sema::DeclPtrTy
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Sema::ActOnStartProtocolInterface(SourceLocation AtProtoInterfaceLoc,
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IdentifierInfo *ProtocolName,
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SourceLocation ProtocolLoc,
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const DeclPtrTy *ProtoRefs,
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unsigned NumProtoRefs,
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const SourceLocation *ProtoLocs,
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SourceLocation EndProtoLoc,
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AttributeList *AttrList) {
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// FIXME: Deal with AttrList.
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assert(ProtocolName && "Missing protocol identifier");
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ObjCProtocolDecl *PDecl = LookupProtocol(ProtocolName, ProtocolLoc);
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if (PDecl) {
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// Protocol already seen. Better be a forward protocol declaration
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if (!PDecl->isForwardDecl()) {
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Diag(ProtocolLoc, diag::warn_duplicate_protocol_def) << ProtocolName;
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Diag(PDecl->getLocation(), diag::note_previous_definition);
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// Just return the protocol we already had.
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// FIXME: don't leak the objects passed in!
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return DeclPtrTy::make(PDecl);
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}
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ObjCList<ObjCProtocolDecl> PList;
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PList.set((ObjCProtocolDecl *const*)ProtoRefs, NumProtoRefs, Context);
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CheckForwardProtocolDeclarationForCircularDependency(
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ProtocolName, ProtocolLoc, PDecl->getLocation(), PList);
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PList.Destroy(Context);
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// Make sure the cached decl gets a valid start location.
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PDecl->setLocation(AtProtoInterfaceLoc);
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PDecl->setForwardDecl(false);
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} else {
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PDecl = ObjCProtocolDecl::Create(Context, CurContext,
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AtProtoInterfaceLoc,ProtocolName);
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PushOnScopeChains(PDecl, TUScope);
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PDecl->setForwardDecl(false);
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}
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if (AttrList)
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ProcessDeclAttributeList(TUScope, PDecl, AttrList);
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if (NumProtoRefs) {
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/// Check then save referenced protocols.
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PDecl->setProtocolList((ObjCProtocolDecl**)ProtoRefs, NumProtoRefs,
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ProtoLocs, Context);
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PDecl->setLocEnd(EndProtoLoc);
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}
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CheckObjCDeclScope(PDecl);
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return DeclPtrTy::make(PDecl);
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}
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/// FindProtocolDeclaration - This routine looks up protocols and
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/// issues an error if they are not declared. It returns list of
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/// protocol declarations in its 'Protocols' argument.
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void
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Sema::FindProtocolDeclaration(bool WarnOnDeclarations,
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const IdentifierLocPair *ProtocolId,
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unsigned NumProtocols,
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llvm::SmallVectorImpl<DeclPtrTy> &Protocols) {
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for (unsigned i = 0; i != NumProtocols; ++i) {
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ObjCProtocolDecl *PDecl = LookupProtocol(ProtocolId[i].first,
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ProtocolId[i].second);
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if (!PDecl) {
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LookupResult R(*this, ProtocolId[i].first, ProtocolId[i].second,
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LookupObjCProtocolName);
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if (CorrectTypo(R, TUScope, 0, 0, false, CTC_NoKeywords) &&
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(PDecl = R.getAsSingle<ObjCProtocolDecl>())) {
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Diag(ProtocolId[i].second, diag::err_undeclared_protocol_suggest)
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<< ProtocolId[i].first << R.getLookupName();
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Diag(PDecl->getLocation(), diag::note_previous_decl)
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<< PDecl->getDeclName();
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}
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}
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if (!PDecl) {
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Diag(ProtocolId[i].second, diag::err_undeclared_protocol)
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<< ProtocolId[i].first;
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continue;
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}
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(void)DiagnoseUseOfDecl(PDecl, ProtocolId[i].second);
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// If this is a forward declaration and we are supposed to warn in this
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// case, do it.
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if (WarnOnDeclarations && PDecl->isForwardDecl())
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Diag(ProtocolId[i].second, diag::warn_undef_protocolref)
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<< ProtocolId[i].first;
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Protocols.push_back(DeclPtrTy::make(PDecl));
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}
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}
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/// DiagnoseClassExtensionDupMethods - Check for duplicate declaration of
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/// a class method in its extension.
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///
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void Sema::DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT,
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ObjCInterfaceDecl *ID) {
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if (!ID)
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return; // Possibly due to previous error
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llvm::DenseMap<Selector, const ObjCMethodDecl*> MethodMap;
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for (ObjCInterfaceDecl::method_iterator i = ID->meth_begin(),
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e = ID->meth_end(); i != e; ++i) {
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ObjCMethodDecl *MD = *i;
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MethodMap[MD->getSelector()] = MD;
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}
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if (MethodMap.empty())
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return;
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for (ObjCCategoryDecl::method_iterator i = CAT->meth_begin(),
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e = CAT->meth_end(); i != e; ++i) {
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ObjCMethodDecl *Method = *i;
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const ObjCMethodDecl *&PrevMethod = MethodMap[Method->getSelector()];
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if (PrevMethod && !MatchTwoMethodDeclarations(Method, PrevMethod)) {
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Diag(Method->getLocation(), diag::err_duplicate_method_decl)
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<< Method->getDeclName();
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Diag(PrevMethod->getLocation(), diag::note_previous_declaration);
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}
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}
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}
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/// ActOnForwardProtocolDeclaration - Handle @protocol foo;
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Action::DeclPtrTy
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Sema::ActOnForwardProtocolDeclaration(SourceLocation AtProtocolLoc,
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const IdentifierLocPair *IdentList,
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unsigned NumElts,
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AttributeList *attrList) {
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llvm::SmallVector<ObjCProtocolDecl*, 32> Protocols;
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llvm::SmallVector<SourceLocation, 8> ProtoLocs;
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for (unsigned i = 0; i != NumElts; ++i) {
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IdentifierInfo *Ident = IdentList[i].first;
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ObjCProtocolDecl *PDecl = LookupProtocol(Ident, IdentList[i].second);
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if (PDecl == 0) { // Not already seen?
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PDecl = ObjCProtocolDecl::Create(Context, CurContext,
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IdentList[i].second, Ident);
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PushOnScopeChains(PDecl, TUScope);
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}
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if (attrList)
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ProcessDeclAttributeList(TUScope, PDecl, attrList);
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Protocols.push_back(PDecl);
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ProtoLocs.push_back(IdentList[i].second);
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}
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ObjCForwardProtocolDecl *PDecl =
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ObjCForwardProtocolDecl::Create(Context, CurContext, AtProtocolLoc,
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Protocols.data(), Protocols.size(),
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ProtoLocs.data());
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CurContext->addDecl(PDecl);
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CheckObjCDeclScope(PDecl);
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return DeclPtrTy::make(PDecl);
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}
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Sema::DeclPtrTy Sema::
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ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc,
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IdentifierInfo *ClassName, SourceLocation ClassLoc,
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IdentifierInfo *CategoryName,
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SourceLocation CategoryLoc,
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const DeclPtrTy *ProtoRefs,
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unsigned NumProtoRefs,
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const SourceLocation *ProtoLocs,
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SourceLocation EndProtoLoc) {
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ObjCCategoryDecl *CDecl = 0;
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ObjCInterfaceDecl *IDecl = getObjCInterfaceDecl(ClassName, ClassLoc, true);
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/// Check that class of this category is already completely declared.
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if (!IDecl || IDecl->isForwardDecl()) {
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// Create an invalid ObjCCategoryDecl to serve as context for
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// the enclosing method declarations. We mark the decl invalid
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// to make it clear that this isn't a valid AST.
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CDecl = ObjCCategoryDecl::Create(Context, CurContext, AtInterfaceLoc,
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ClassLoc, CategoryLoc, CategoryName);
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CDecl->setInvalidDecl();
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Diag(ClassLoc, diag::err_undef_interface) << ClassName;
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return DeclPtrTy::make(CDecl);
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}
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if (!CategoryName) {
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// Class extensions require a special treatment. Use an existing one.
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// Note that 'getClassExtension()' can return NULL.
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CDecl = IDecl->getClassExtension();
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if (IDecl->getImplementation()) {
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Diag(ClassLoc, diag::err_class_extension_after_impl) << ClassName;
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Diag(IDecl->getImplementation()->getLocation(),
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diag::note_implementation_declared);
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}
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}
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if (!CDecl) {
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CDecl = ObjCCategoryDecl::Create(Context, CurContext, AtInterfaceLoc,
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ClassLoc, CategoryLoc, CategoryName);
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// FIXME: PushOnScopeChains?
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CurContext->addDecl(CDecl);
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CDecl->setClassInterface(IDecl);
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// Insert first use of class extension to the list of class's categories.
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if (!CategoryName)
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CDecl->insertNextClassCategory();
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}
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// If the interface is deprecated, warn about it.
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(void)DiagnoseUseOfDecl(IDecl, ClassLoc);
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if (CategoryName) {
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/// Check for duplicate interface declaration for this category
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ObjCCategoryDecl *CDeclChain;
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for (CDeclChain = IDecl->getCategoryList(); CDeclChain;
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CDeclChain = CDeclChain->getNextClassCategory()) {
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if (CDeclChain->getIdentifier() == CategoryName) {
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// Class extensions can be declared multiple times.
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Diag(CategoryLoc, diag::warn_dup_category_def)
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<< ClassName << CategoryName;
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Diag(CDeclChain->getLocation(), diag::note_previous_definition);
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break;
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}
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}
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if (!CDeclChain)
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CDecl->insertNextClassCategory();
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}
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|
|
if (NumProtoRefs) {
|
|
CDecl->setProtocolList((ObjCProtocolDecl**)ProtoRefs, NumProtoRefs,
|
|
ProtoLocs, Context);
|
|
// Protocols in the class extension belong to the class.
|
|
if (CDecl->IsClassExtension())
|
|
IDecl->mergeClassExtensionProtocolList((ObjCProtocolDecl**)ProtoRefs,
|
|
NumProtoRefs, ProtoLocs,
|
|
Context);
|
|
}
|
|
|
|
CheckObjCDeclScope(CDecl);
|
|
return DeclPtrTy::make(CDecl);
|
|
}
|
|
|
|
/// ActOnStartCategoryImplementation - Perform semantic checks on the
|
|
/// category implementation declaration and build an ObjCCategoryImplDecl
|
|
/// object.
|
|
Sema::DeclPtrTy Sema::ActOnStartCategoryImplementation(
|
|
SourceLocation AtCatImplLoc,
|
|
IdentifierInfo *ClassName, SourceLocation ClassLoc,
|
|
IdentifierInfo *CatName, SourceLocation CatLoc) {
|
|
ObjCInterfaceDecl *IDecl = getObjCInterfaceDecl(ClassName, ClassLoc, true);
|
|
ObjCCategoryDecl *CatIDecl = 0;
|
|
if (IDecl) {
|
|
CatIDecl = IDecl->FindCategoryDeclaration(CatName);
|
|
if (!CatIDecl) {
|
|
// Category @implementation with no corresponding @interface.
|
|
// Create and install one.
|
|
CatIDecl = ObjCCategoryDecl::Create(Context, CurContext, SourceLocation(),
|
|
SourceLocation(), SourceLocation(),
|
|
CatName);
|
|
CatIDecl->setClassInterface(IDecl);
|
|
CatIDecl->insertNextClassCategory();
|
|
}
|
|
}
|
|
|
|
ObjCCategoryImplDecl *CDecl =
|
|
ObjCCategoryImplDecl::Create(Context, CurContext, AtCatImplLoc, CatName,
|
|
IDecl);
|
|
/// Check that class of this category is already completely declared.
|
|
if (!IDecl || IDecl->isForwardDecl())
|
|
Diag(ClassLoc, diag::err_undef_interface) << ClassName;
|
|
|
|
// FIXME: PushOnScopeChains?
|
|
CurContext->addDecl(CDecl);
|
|
|
|
/// Check that CatName, category name, is not used in another implementation.
|
|
if (CatIDecl) {
|
|
if (CatIDecl->getImplementation()) {
|
|
Diag(ClassLoc, diag::err_dup_implementation_category) << ClassName
|
|
<< CatName;
|
|
Diag(CatIDecl->getImplementation()->getLocation(),
|
|
diag::note_previous_definition);
|
|
} else
|
|
CatIDecl->setImplementation(CDecl);
|
|
}
|
|
|
|
CheckObjCDeclScope(CDecl);
|
|
return DeclPtrTy::make(CDecl);
|
|
}
|
|
|
|
Sema::DeclPtrTy Sema::ActOnStartClassImplementation(
|
|
SourceLocation AtClassImplLoc,
|
|
IdentifierInfo *ClassName, SourceLocation ClassLoc,
|
|
IdentifierInfo *SuperClassname,
|
|
SourceLocation SuperClassLoc) {
|
|
ObjCInterfaceDecl* IDecl = 0;
|
|
// Check for another declaration kind with the same name.
|
|
NamedDecl *PrevDecl
|
|
= LookupSingleName(TUScope, ClassName, ClassLoc, LookupOrdinaryName,
|
|
ForRedeclaration);
|
|
if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) {
|
|
Diag(ClassLoc, diag::err_redefinition_different_kind) << ClassName;
|
|
Diag(PrevDecl->getLocation(), diag::note_previous_definition);
|
|
} else if ((IDecl = dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl))) {
|
|
// If this is a forward declaration of an interface, warn.
|
|
if (IDecl->isForwardDecl()) {
|
|
Diag(ClassLoc, diag::warn_undef_interface) << ClassName;
|
|
IDecl = 0;
|
|
}
|
|
} else {
|
|
// We did not find anything with the name ClassName; try to correct for
|
|
// typos in the class name.
|
|
LookupResult R(*this, ClassName, ClassLoc, LookupOrdinaryName);
|
|
if (CorrectTypo(R, TUScope, 0, 0, false, CTC_NoKeywords) &&
|
|
(IDecl = R.getAsSingle<ObjCInterfaceDecl>())) {
|
|
// Suggest the (potentially) correct interface name. However, put the
|
|
// fix-it hint itself in a separate note, since changing the name in
|
|
// the warning would make the fix-it change semantics.However, don't
|
|
// provide a code-modification hint or use the typo name for recovery,
|
|
// because this is just a warning. The program may actually be correct.
|
|
Diag(ClassLoc, diag::warn_undef_interface_suggest)
|
|
<< ClassName << R.getLookupName();
|
|
Diag(IDecl->getLocation(), diag::note_previous_decl)
|
|
<< R.getLookupName()
|
|
<< FixItHint::CreateReplacement(ClassLoc,
|
|
R.getLookupName().getAsString());
|
|
IDecl = 0;
|
|
} else {
|
|
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 = LookupSingleName(TUScope, SuperClassname, SuperClassLoc,
|
|
LookupOrdinaryName);
|
|
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, CurContext, AtClassImplLoc,
|
|
ClassName, ClassLoc, false, true);
|
|
IDecl->setSuperClass(SDecl);
|
|
IDecl->setLocEnd(ClassLoc);
|
|
|
|
PushOnScopeChains(IDecl, TUScope);
|
|
} else {
|
|
// Mark the interface as being completed, even if it was just as
|
|
// @class ....;
|
|
// declaration; the user cannot reopen it.
|
|
IDecl->setForwardDecl(false);
|
|
}
|
|
|
|
ObjCImplementationDecl* IMPDecl =
|
|
ObjCImplementationDecl::Create(Context, CurContext, AtClassImplLoc,
|
|
IDecl, SDecl);
|
|
|
|
if (CheckObjCDeclScope(IMPDecl))
|
|
return DeclPtrTy::make(IMPDecl);
|
|
|
|
// Check that there is no duplicate implementation of this class.
|
|
if (IDecl->getImplementation()) {
|
|
// FIXME: Don't leak everything!
|
|
Diag(ClassLoc, diag::err_dup_implementation_class) << ClassName;
|
|
Diag(IDecl->getImplementation()->getLocation(),
|
|
diag::note_previous_definition);
|
|
} else { // add it to the list.
|
|
IDecl->setImplementation(IMPDecl);
|
|
PushOnScopeChains(IMPDecl, TUScope);
|
|
}
|
|
return DeclPtrTy::make(IMPDecl);
|
|
}
|
|
|
|
void Sema::CheckImplementationIvars(ObjCImplementationDecl *ImpDecl,
|
|
ObjCIvarDecl **ivars, unsigned numIvars,
|
|
SourceLocation RBrace) {
|
|
assert(ImpDecl && "missing implementation decl");
|
|
ObjCInterfaceDecl* IDecl = ImpDecl->getClassInterface();
|
|
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->isImplicitInterfaceDecl()) {
|
|
IDecl->setLocEnd(RBrace);
|
|
// Add ivar's to class's DeclContext.
|
|
for (unsigned i = 0, e = numIvars; i != e; ++i) {
|
|
ivars[i]->setLexicalDeclContext(ImpDecl);
|
|
IDecl->makeDeclVisibleInContext(ivars[i], false);
|
|
ImpDecl->addDecl(ivars[i]);
|
|
}
|
|
|
|
return;
|
|
}
|
|
// If implementation has empty ivar list, just return.
|
|
if (numIvars == 0)
|
|
return;
|
|
|
|
assert(ivars && "missing @implementation ivars");
|
|
if (LangOpts.ObjCNonFragileABI2) {
|
|
if (ImpDecl->getSuperClass())
|
|
Diag(ImpDecl->getLocation(), diag::warn_on_superclass_use);
|
|
for (unsigned i = 0; i < numIvars; i++) {
|
|
ObjCIvarDecl* ImplIvar = ivars[i];
|
|
if (const ObjCIvarDecl *ClsIvar =
|
|
IDecl->getIvarDecl(ImplIvar->getIdentifier())) {
|
|
Diag(ImplIvar->getLocation(), diag::err_duplicate_ivar_declaration);
|
|
Diag(ClsIvar->getLocation(), diag::note_previous_definition);
|
|
continue;
|
|
}
|
|
// Instance ivar to Implementation's DeclContext.
|
|
ImplIvar->setLexicalDeclContext(ImpDecl);
|
|
IDecl->makeDeclVisibleInContext(ImplIvar, false);
|
|
ImpDecl->addDecl(ImplIvar);
|
|
}
|
|
return;
|
|
}
|
|
// 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");
|
|
|
|
// First, make sure the types match.
|
|
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);
|
|
} else if (ImplIvar->isBitField() && ClsIvar->isBitField()) {
|
|
Expr *ImplBitWidth = ImplIvar->getBitWidth();
|
|
Expr *ClsBitWidth = ClsIvar->getBitWidth();
|
|
if (ImplBitWidth->EvaluateAsInt(Context).getZExtValue() !=
|
|
ClsBitWidth->EvaluateAsInt(Context).getZExtValue()) {
|
|
Diag(ImplBitWidth->getLocStart(), diag::err_conflicting_ivar_bitwidth)
|
|
<< ImplIvar->getIdentifier();
|
|
Diag(ClsBitWidth->getLocStart(), diag::note_previous_definition);
|
|
}
|
|
}
|
|
// Make sure the names are identical.
|
|
if (ImplIvar->getIdentifier() != ClsIvar->getIdentifier()) {
|
|
Diag(ImplIvar->getLocation(), diag::err_conflicting_ivar_name)
|
|
<< ImplIvar->getIdentifier() << ClsIvar->getIdentifier();
|
|
Diag(ClsIvar->getLocation(), diag::note_previous_definition);
|
|
}
|
|
--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, unsigned DiagID) {
|
|
if (!IncompleteImpl) {
|
|
Diag(ImpLoc, diag::warn_incomplete_impl);
|
|
IncompleteImpl = true;
|
|
}
|
|
Diag(method->getLocation(), DiagID)
|
|
<< method->getDeclName();
|
|
}
|
|
|
|
void Sema::WarnConflictingTypedMethods(ObjCMethodDecl *ImpMethodDecl,
|
|
ObjCMethodDecl *IntfMethodDecl) {
|
|
if (!Context.typesAreCompatible(IntfMethodDecl->getResultType(),
|
|
ImpMethodDecl->getResultType()) &&
|
|
!Context.QualifiedIdConformsQualifiedId(IntfMethodDecl->getResultType(),
|
|
ImpMethodDecl->getResultType())) {
|
|
Diag(ImpMethodDecl->getLocation(), diag::warn_conflicting_ret_types)
|
|
<< ImpMethodDecl->getDeclName() << IntfMethodDecl->getResultType()
|
|
<< ImpMethodDecl->getResultType();
|
|
Diag(IntfMethodDecl->getLocation(), diag::note_previous_definition);
|
|
}
|
|
|
|
for (ObjCMethodDecl::param_iterator IM = ImpMethodDecl->param_begin(),
|
|
IF = IntfMethodDecl->param_begin(), EM = ImpMethodDecl->param_end();
|
|
IM != EM; ++IM, ++IF) {
|
|
QualType ParmDeclTy = (*IF)->getType().getUnqualifiedType();
|
|
QualType ParmImpTy = (*IM)->getType().getUnqualifiedType();
|
|
if (Context.typesAreCompatible(ParmDeclTy, ParmImpTy) ||
|
|
Context.QualifiedIdConformsQualifiedId(ParmDeclTy, ParmImpTy))
|
|
continue;
|
|
|
|
Diag((*IM)->getLocation(), diag::warn_conflicting_param_types)
|
|
<< ImpMethodDecl->getDeclName() << (*IF)->getType()
|
|
<< (*IM)->getType();
|
|
Diag((*IF)->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,
|
|
ObjCContainerDecl *CDecl) {
|
|
ObjCInterfaceDecl *IDecl;
|
|
if (ObjCCategoryDecl *C = dyn_cast<ObjCCategoryDecl>(CDecl))
|
|
IDecl = C->getClassInterface();
|
|
else
|
|
IDecl = dyn_cast<ObjCInterfaceDecl>(CDecl);
|
|
assert (IDecl && "CheckProtocolMethodDefs - IDecl is null");
|
|
|
|
ObjCInterfaceDecl *Super = IDecl->getSuperClass();
|
|
ObjCInterfaceDecl *NSIDecl = 0;
|
|
if (getLangOptions().NeXTRuntime) {
|
|
// check to see if class implements forwardInvocation method and objects
|
|
// of this class are derived from 'NSProxy' so that to forward requests
|
|
// from one object to another.
|
|
// Under such conditions, which means that every method possible is
|
|
// implemented in the class, we should not issue "Method definition not
|
|
// found" warnings.
|
|
// FIXME: Use a general GetUnarySelector method for this.
|
|
IdentifierInfo* II = &Context.Idents.get("forwardInvocation");
|
|
Selector fISelector = Context.Selectors.getSelector(1, &II);
|
|
if (InsMap.count(fISelector))
|
|
// Is IDecl derived from 'NSProxy'? If so, no instance methods
|
|
// need be implemented in the implementation.
|
|
NSIDecl = IDecl->lookupInheritedClass(&Context.Idents.get("NSProxy"));
|
|
}
|
|
|
|
// 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.
|
|
if (!NSIDecl)
|
|
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()))) {
|
|
// Ugly, but necessary. Method declared in protcol might have
|
|
// have been synthesized due to a property declared in the class which
|
|
// uses the protocol.
|
|
ObjCMethodDecl *MethodInClass =
|
|
IDecl->lookupInstanceMethod(method->getSelector());
|
|
if (!MethodInClass || !MethodInClass->isSynthesized()) {
|
|
unsigned DIAG = diag::warn_unimplemented_protocol_method;
|
|
if (Diags.getDiagnosticLevel(DIAG) != Diagnostic::Ignored) {
|
|
WarnUndefinedMethod(ImpLoc, method, IncompleteImpl, DIAG);
|
|
Diag(CDecl->getLocation(), diag::note_required_for_protocol_at)
|
|
<< PDecl->getDeclName();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
// 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()))) {
|
|
unsigned DIAG = diag::warn_unimplemented_protocol_method;
|
|
if (Diags.getDiagnosticLevel(DIAG) != Diagnostic::Ignored) {
|
|
WarnUndefinedMethod(ImpLoc, method, IncompleteImpl, DIAG);
|
|
Diag(IDecl->getLocation(), diag::note_required_for_protocol_at) <<
|
|
PDecl->getDeclName();
|
|
}
|
|
}
|
|
}
|
|
// 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);
|
|
}
|
|
|
|
/// MatchAllMethodDeclarations - Check methods declaraed in interface or
|
|
/// or protocol against those declared in their implementations.
|
|
///
|
|
void Sema::MatchAllMethodDeclarations(const llvm::DenseSet<Selector> &InsMap,
|
|
const llvm::DenseSet<Selector> &ClsMap,
|
|
llvm::DenseSet<Selector> &InsMapSeen,
|
|
llvm::DenseSet<Selector> &ClsMapSeen,
|
|
ObjCImplDecl* IMPDecl,
|
|
ObjCContainerDecl* CDecl,
|
|
bool &IncompleteImpl,
|
|
bool ImmediateClass) {
|
|
// Check and see if instance methods in class interface have been
|
|
// implemented in the implementation class. If so, their types match.
|
|
for (ObjCInterfaceDecl::instmeth_iterator I = CDecl->instmeth_begin(),
|
|
E = CDecl->instmeth_end(); I != E; ++I) {
|
|
if (InsMapSeen.count((*I)->getSelector()))
|
|
continue;
|
|
InsMapSeen.insert((*I)->getSelector());
|
|
if (!(*I)->isSynthesized() &&
|
|
!InsMap.count((*I)->getSelector())) {
|
|
if (ImmediateClass)
|
|
WarnUndefinedMethod(IMPDecl->getLocation(), *I, IncompleteImpl,
|
|
diag::note_undef_method_impl);
|
|
continue;
|
|
} else {
|
|
ObjCMethodDecl *ImpMethodDecl =
|
|
IMPDecl->getInstanceMethod((*I)->getSelector());
|
|
ObjCMethodDecl *IntfMethodDecl =
|
|
CDecl->getInstanceMethod((*I)->getSelector());
|
|
assert(IntfMethodDecl &&
|
|
"IntfMethodDecl is null in ImplMethodsVsClassMethods");
|
|
// ImpMethodDecl may be null as in a @dynamic property.
|
|
if (ImpMethodDecl)
|
|
WarnConflictingTypedMethods(ImpMethodDecl, IntfMethodDecl);
|
|
}
|
|
}
|
|
|
|
// Check and see if class methods in class interface have been
|
|
// implemented in the implementation class. If so, their types match.
|
|
for (ObjCInterfaceDecl::classmeth_iterator
|
|
I = CDecl->classmeth_begin(), E = CDecl->classmeth_end(); I != E; ++I) {
|
|
if (ClsMapSeen.count((*I)->getSelector()))
|
|
continue;
|
|
ClsMapSeen.insert((*I)->getSelector());
|
|
if (!ClsMap.count((*I)->getSelector())) {
|
|
if (ImmediateClass)
|
|
WarnUndefinedMethod(IMPDecl->getLocation(), *I, IncompleteImpl,
|
|
diag::note_undef_method_impl);
|
|
} else {
|
|
ObjCMethodDecl *ImpMethodDecl =
|
|
IMPDecl->getClassMethod((*I)->getSelector());
|
|
ObjCMethodDecl *IntfMethodDecl =
|
|
CDecl->getClassMethod((*I)->getSelector());
|
|
WarnConflictingTypedMethods(ImpMethodDecl, IntfMethodDecl);
|
|
}
|
|
}
|
|
if (ObjCInterfaceDecl *I = dyn_cast<ObjCInterfaceDecl> (CDecl)) {
|
|
// Check for any implementation of a methods declared in protocol.
|
|
for (ObjCInterfaceDecl::protocol_iterator PI = I->protocol_begin(),
|
|
E = I->protocol_end(); PI != E; ++PI)
|
|
MatchAllMethodDeclarations(InsMap, ClsMap, InsMapSeen, ClsMapSeen,
|
|
IMPDecl,
|
|
(*PI), IncompleteImpl, false);
|
|
if (I->getSuperClass())
|
|
MatchAllMethodDeclarations(InsMap, ClsMap, InsMapSeen, ClsMapSeen,
|
|
IMPDecl,
|
|
I->getSuperClass(), IncompleteImpl, false);
|
|
}
|
|
}
|
|
|
|
void Sema::ImplMethodsVsClassMethods(ObjCImplDecl* IMPDecl,
|
|
ObjCContainerDecl* CDecl,
|
|
bool IncompleteImpl) {
|
|
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());
|
|
|
|
// Check and see if properties declared in the interface have either 1)
|
|
// an implementation or 2) there is a @synthesize/@dynamic implementation
|
|
// of the property in the @implementation.
|
|
if (isa<ObjCInterfaceDecl>(CDecl))
|
|
DiagnoseUnimplementedProperties(IMPDecl, CDecl, InsMap);
|
|
|
|
llvm::DenseSet<Selector> ClsMap;
|
|
for (ObjCImplementationDecl::classmeth_iterator
|
|
I = IMPDecl->classmeth_begin(),
|
|
E = IMPDecl->classmeth_end(); I != E; ++I)
|
|
ClsMap.insert((*I)->getSelector());
|
|
|
|
// Check for type conflict of methods declared in a class/protocol and
|
|
// its implementation; if any.
|
|
llvm::DenseSet<Selector> InsMapSeen, ClsMapSeen;
|
|
MatchAllMethodDeclarations(InsMap, ClsMap, InsMapSeen, ClsMapSeen,
|
|
IMPDecl, CDecl,
|
|
IncompleteImpl, true);
|
|
|
|
// Check the protocol list for unimplemented methods in the @implementation
|
|
// class.
|
|
// Check and see if class methods in class interface have been
|
|
// implemented in the implementation class.
|
|
|
|
if (ObjCInterfaceDecl *I = dyn_cast<ObjCInterfaceDecl> (CDecl)) {
|
|
for (ObjCInterfaceDecl::protocol_iterator PI = I->protocol_begin(),
|
|
E = I->protocol_end(); PI != E; ++PI)
|
|
CheckProtocolMethodDefs(IMPDecl->getLocation(), *PI, IncompleteImpl,
|
|
InsMap, ClsMap, I);
|
|
// Check class extensions (unnamed categories)
|
|
for (ObjCCategoryDecl *Categories = I->getCategoryList();
|
|
Categories; Categories = Categories->getNextClassCategory()) {
|
|
if (Categories->IsClassExtension()) {
|
|
ImplMethodsVsClassMethods(IMPDecl, Categories, IncompleteImpl);
|
|
break;
|
|
}
|
|
}
|
|
} else if (ObjCCategoryDecl *C = dyn_cast<ObjCCategoryDecl>(CDecl)) {
|
|
// For extended class, unimplemented methods in its protocols will
|
|
// be reported in the primary class.
|
|
if (!C->IsClassExtension()) {
|
|
for (ObjCCategoryDecl::protocol_iterator PI = C->protocol_begin(),
|
|
E = C->protocol_end(); PI != E; ++PI)
|
|
CheckProtocolMethodDefs(IMPDecl->getLocation(), *PI, IncompleteImpl,
|
|
InsMap, ClsMap, CDecl);
|
|
// Report unimplemented properties in the category as well.
|
|
// When reporting on missing setter/getters, do not report when
|
|
// setter/getter is implemented in category's primary class
|
|
// implementation.
|
|
if (ObjCInterfaceDecl *ID = C->getClassInterface())
|
|
if (ObjCImplDecl *IMP = ID->getImplementation()) {
|
|
for (ObjCImplementationDecl::instmeth_iterator
|
|
I = IMP->instmeth_begin(), E = IMP->instmeth_end(); I!=E; ++I)
|
|
InsMap.insert((*I)->getSelector());
|
|
}
|
|
DiagnoseUnimplementedProperties(IMPDecl, CDecl, InsMap);
|
|
}
|
|
} else
|
|
assert(false && "invalid ObjCContainerDecl type.");
|
|
}
|
|
|
|
/// ActOnForwardClassDeclaration -
|
|
Action::DeclPtrTy
|
|
Sema::ActOnForwardClassDeclaration(SourceLocation AtClassLoc,
|
|
IdentifierInfo **IdentList,
|
|
SourceLocation *IdentLocs,
|
|
unsigned NumElts) {
|
|
llvm::SmallVector<ObjCInterfaceDecl*, 32> Interfaces;
|
|
|
|
for (unsigned i = 0; i != NumElts; ++i) {
|
|
// Check for another declaration kind with the same name.
|
|
NamedDecl *PrevDecl
|
|
= LookupSingleName(TUScope, IdentList[i], IdentLocs[i],
|
|
LookupOrdinaryName, ForRedeclaration);
|
|
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);
|
|
} else if (TDD) {
|
|
// a forward class declaration matching a typedef name of a class refers
|
|
// to the underlying class.
|
|
if (ObjCInterfaceType * OI =
|
|
dyn_cast<ObjCInterfaceType>(TDD->getUnderlyingType()))
|
|
PrevDecl = OI->getDecl();
|
|
}
|
|
}
|
|
ObjCInterfaceDecl *IDecl = dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl);
|
|
if (!IDecl) { // Not already seen? Make a forward decl.
|
|
IDecl = ObjCInterfaceDecl::Create(Context, CurContext, AtClassLoc,
|
|
IdentList[i], IdentLocs[i], true);
|
|
|
|
// Push the ObjCInterfaceDecl on the scope chain but do *not* add it to
|
|
// the current DeclContext. This prevents clients that walk DeclContext
|
|
// from seeing the imaginary ObjCInterfaceDecl until it is actually
|
|
// declared later (if at all). We also take care to explicitly make
|
|
// sure this declaration is visible for name lookup.
|
|
PushOnScopeChains(IDecl, TUScope, false);
|
|
CurContext->makeDeclVisibleInContext(IDecl, true);
|
|
}
|
|
|
|
Interfaces.push_back(IDecl);
|
|
}
|
|
|
|
assert(Interfaces.size() == NumElts);
|
|
ObjCClassDecl *CDecl = ObjCClassDecl::Create(Context, CurContext, AtClassLoc,
|
|
Interfaces.data(), IdentLocs,
|
|
Interfaces.size());
|
|
CurContext->addDecl(CDecl);
|
|
CheckObjCDeclScope(CDecl);
|
|
return DeclPtrTy::make(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;
|
|
}
|
|
|
|
ObjCMethodDecl::param_iterator ParamI = Method->param_begin(),
|
|
E = Method->param_end();
|
|
ObjCMethodDecl::param_iterator PrevI = PrevMethod->param_begin();
|
|
|
|
for (; ParamI != E; ++ParamI, ++PrevI) {
|
|
assert(PrevI != PrevMethod->param_end() && "Param mismatch");
|
|
T1 = Context.getCanonicalType((*ParamI)->getType());
|
|
T2 = Context.getCanonicalType((*PrevI)->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;
|
|
}
|
|
|
|
/// \brief Read the contents of the instance and factory method pools
|
|
/// for a given selector from external storage.
|
|
///
|
|
/// This routine should only be called once, when neither the instance
|
|
/// nor the factory method pool has an entry for this selector.
|
|
Sema::MethodPool::iterator Sema::ReadMethodPool(Selector Sel,
|
|
bool isInstance) {
|
|
assert(ExternalSource && "We need an external AST source");
|
|
assert(InstanceMethodPool.find(Sel) == InstanceMethodPool.end() &&
|
|
"Selector data already loaded into the instance method pool");
|
|
assert(FactoryMethodPool.find(Sel) == FactoryMethodPool.end() &&
|
|
"Selector data already loaded into the factory method pool");
|
|
|
|
// Read the method list from the external source.
|
|
std::pair<ObjCMethodList, ObjCMethodList> Methods
|
|
= ExternalSource->ReadMethodPool(Sel);
|
|
|
|
if (isInstance) {
|
|
if (Methods.second.Method)
|
|
FactoryMethodPool[Sel] = Methods.second;
|
|
return InstanceMethodPool.insert(std::make_pair(Sel, Methods.first)).first;
|
|
}
|
|
|
|
if (Methods.first.Method)
|
|
InstanceMethodPool[Sel] = Methods.first;
|
|
|
|
return FactoryMethodPool.insert(std::make_pair(Sel, Methods.second)).first;
|
|
}
|
|
|
|
void Sema::AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method) {
|
|
llvm::DenseMap<Selector, ObjCMethodList>::iterator Pos
|
|
= InstanceMethodPool.find(Method->getSelector());
|
|
if (Pos == InstanceMethodPool.end()) {
|
|
if (ExternalSource && !FactoryMethodPool.count(Method->getSelector()))
|
|
Pos = ReadMethodPool(Method->getSelector(), /*isInstance=*/true);
|
|
else
|
|
Pos = InstanceMethodPool.insert(std::make_pair(Method->getSelector(),
|
|
ObjCMethodList())).first;
|
|
}
|
|
|
|
ObjCMethodList &Entry = Pos->second;
|
|
if (Entry.Method == 0) {
|
|
// Haven't seen a method with this selector name yet - add it.
|
|
Entry.Method = Method;
|
|
Entry.Next = 0;
|
|
return;
|
|
}
|
|
|
|
// We've seen a method with this name, see if we have already seen this type
|
|
// signature.
|
|
for (ObjCMethodList *List = &Entry; List; List = List->Next)
|
|
if (MatchTwoMethodDeclarations(Method, List->Method))
|
|
return;
|
|
|
|
// We have a new signature for an existing method - add it.
|
|
// This is extremely rare. Only 1% of Cocoa selectors are "overloaded".
|
|
ObjCMethodList *Mem = BumpAlloc.Allocate<ObjCMethodList>();
|
|
Entry.Next = new (Mem) ObjCMethodList(Method, Entry.Next);
|
|
}
|
|
|
|
// FIXME: Finish implementing -Wno-strict-selector-match.
|
|
ObjCMethodDecl *Sema::LookupInstanceMethodInGlobalPool(Selector Sel,
|
|
SourceRange R,
|
|
bool warn) {
|
|
llvm::DenseMap<Selector, ObjCMethodList>::iterator Pos
|
|
= InstanceMethodPool.find(Sel);
|
|
if (Pos == InstanceMethodPool.end()) {
|
|
if (ExternalSource && !FactoryMethodPool.count(Sel))
|
|
Pos = ReadMethodPool(Sel, /*isInstance=*/true);
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
ObjCMethodList &MethList = Pos->second;
|
|
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 = warn;
|
|
}
|
|
if (issueWarning && (MethList.Method && MethList.Next)) {
|
|
Diag(R.getBegin(), diag::warn_multiple_method_decl) << Sel << R;
|
|
Diag(MethList.Method->getLocStart(), diag::note_using)
|
|
<< MethList.Method->getSourceRange();
|
|
for (ObjCMethodList *Next = MethList.Next; Next; Next = Next->Next)
|
|
Diag(Next->Method->getLocStart(), diag::note_also_found)
|
|
<< Next->Method->getSourceRange();
|
|
}
|
|
return MethList.Method;
|
|
}
|
|
|
|
void Sema::AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method) {
|
|
llvm::DenseMap<Selector, ObjCMethodList>::iterator Pos
|
|
= FactoryMethodPool.find(Method->getSelector());
|
|
if (Pos == FactoryMethodPool.end()) {
|
|
if (ExternalSource && !InstanceMethodPool.count(Method->getSelector()))
|
|
Pos = ReadMethodPool(Method->getSelector(), /*isInstance=*/false);
|
|
else
|
|
Pos = FactoryMethodPool.insert(std::make_pair(Method->getSelector(),
|
|
ObjCMethodList())).first;
|
|
}
|
|
|
|
ObjCMethodList &FirstMethod = Pos->second;
|
|
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".
|
|
ObjCMethodList *Mem = BumpAlloc.Allocate<ObjCMethodList>();
|
|
ObjCMethodList *OMI = new (Mem) ObjCMethodList(Method, FirstMethod.Next);
|
|
FirstMethod.Next = OMI;
|
|
}
|
|
}
|
|
}
|
|
|
|
ObjCMethodDecl *Sema::LookupFactoryMethodInGlobalPool(Selector Sel,
|
|
SourceRange R) {
|
|
llvm::DenseMap<Selector, ObjCMethodList>::iterator Pos
|
|
= FactoryMethodPool.find(Sel);
|
|
if (Pos == FactoryMethodPool.end()) {
|
|
if (ExternalSource && !InstanceMethodPool.count(Sel))
|
|
Pos = ReadMethodPool(Sel, /*isInstance=*/false);
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
ObjCMethodList &MethList = Pos->second;
|
|
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)
|
|
<< MethList.Method->getSourceRange();
|
|
for (ObjCMethodList *Next = MethList.Next; Next; Next = Next->Next)
|
|
Diag(Next->Method->getLocStart(), diag::note_also_found)
|
|
<< Next->Method->getSourceRange();
|
|
}
|
|
return MethList.Method;
|
|
}
|
|
|
|
/// CompareMethodParamsInBaseAndSuper - This routine compares methods with
|
|
/// identical selector names in current and its super classes and issues
|
|
/// a warning if any of their argument types are incompatible.
|
|
void Sema::CompareMethodParamsInBaseAndSuper(Decl *ClassDecl,
|
|
ObjCMethodDecl *Method,
|
|
bool IsInstance) {
|
|
ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(ClassDecl);
|
|
if (ID == 0) return;
|
|
|
|
while (ObjCInterfaceDecl *SD = ID->getSuperClass()) {
|
|
ObjCMethodDecl *SuperMethodDecl =
|
|
SD->lookupMethod(Method->getSelector(), IsInstance);
|
|
if (SuperMethodDecl == 0) {
|
|
ID = SD;
|
|
continue;
|
|
}
|
|
ObjCMethodDecl::param_iterator ParamI = Method->param_begin(),
|
|
E = Method->param_end();
|
|
ObjCMethodDecl::param_iterator PrevI = SuperMethodDecl->param_begin();
|
|
for (; ParamI != E; ++ParamI, ++PrevI) {
|
|
// Number of parameters are the same and is guaranteed by selector match.
|
|
assert(PrevI != SuperMethodDecl->param_end() && "Param mismatch");
|
|
QualType T1 = Context.getCanonicalType((*ParamI)->getType());
|
|
QualType T2 = Context.getCanonicalType((*PrevI)->getType());
|
|
// If type of arguement of method in this class does not match its
|
|
// respective argument type in the super class method, issue warning;
|
|
if (!Context.typesAreCompatible(T1, T2)) {
|
|
Diag((*ParamI)->getLocation(), diag::ext_typecheck_base_super)
|
|
<< T1 << T2;
|
|
Diag(SuperMethodDecl->getLocation(), diag::note_previous_declaration);
|
|
return;
|
|
}
|
|
}
|
|
ID = SD;
|
|
}
|
|
}
|
|
|
|
/// DiagnoseDuplicateIvars -
|
|
/// Check for duplicate ivars in the entire class at the start of
|
|
/// @implementation. This becomes necesssary because class extension can
|
|
/// add ivars to a class in random order which will not be known until
|
|
/// class's @implementation is seen.
|
|
void Sema::DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID,
|
|
ObjCInterfaceDecl *SID) {
|
|
for (ObjCInterfaceDecl::ivar_iterator IVI = ID->ivar_begin(),
|
|
IVE = ID->ivar_end(); IVI != IVE; ++IVI) {
|
|
ObjCIvarDecl* Ivar = (*IVI);
|
|
if (Ivar->isInvalidDecl())
|
|
continue;
|
|
if (IdentifierInfo *II = Ivar->getIdentifier()) {
|
|
ObjCIvarDecl* prevIvar = SID->lookupInstanceVariable(II);
|
|
if (prevIvar) {
|
|
Diag(Ivar->getLocation(), diag::err_duplicate_member) << II;
|
|
Diag(prevIvar->getLocation(), diag::note_previous_declaration);
|
|
Ivar->setInvalidDecl();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Note: For class/category implemenations, allMethods/allProperties is
|
|
// always null.
|
|
void Sema::ActOnAtEnd(SourceRange AtEnd,
|
|
DeclPtrTy classDecl,
|
|
DeclPtrTy *allMethods, unsigned allNum,
|
|
DeclPtrTy *allProperties, unsigned pNum,
|
|
DeclGroupPtrTy *allTUVars, unsigned tuvNum) {
|
|
Decl *ClassDecl = classDecl.getAs<Decl>();
|
|
|
|
// 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;
|
|
|
|
bool isInterfaceDeclKind =
|
|
isa<ObjCInterfaceDecl>(ClassDecl) || isa<ObjCCategoryDecl>(ClassDecl)
|
|
|| isa<ObjCProtocolDecl>(ClassDecl);
|
|
bool checkIdenticalMethods = isa<ObjCImplementationDecl>(ClassDecl);
|
|
|
|
if (!isInterfaceDeclKind && AtEnd.isInvalid()) {
|
|
// FIXME: This is wrong. We shouldn't be pretending that there is
|
|
// an '@end' in the declaration.
|
|
SourceLocation L = ClassDecl->getLocation();
|
|
AtEnd.setBegin(L);
|
|
AtEnd.setEnd(L);
|
|
Diag(L, diag::warn_missing_atend);
|
|
}
|
|
|
|
DeclContext *DC = dyn_cast<DeclContext>(ClassDecl);
|
|
|
|
// FIXME: Remove these and use the ObjCContainerDecl/DeclContext.
|
|
llvm::DenseMap<Selector, const ObjCMethodDecl*> InsMap;
|
|
llvm::DenseMap<Selector, const ObjCMethodDecl*> ClsMap;
|
|
|
|
for (unsigned i = 0; i < allNum; i++ ) {
|
|
ObjCMethodDecl *Method =
|
|
cast_or_null<ObjCMethodDecl>(allMethods[i].getAs<Decl>());
|
|
|
|
if (!Method) continue; // Already issued a diagnostic.
|
|
if (Method->isInstanceMethod()) {
|
|
/// 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 {
|
|
DC->addDecl(Method);
|
|
InsMap[Method->getSelector()] = Method;
|
|
/// The following allows us to typecheck messages to "id".
|
|
AddInstanceMethodToGlobalPool(Method);
|
|
// verify that the instance method conforms to the same definition of
|
|
// parent methods if it shadows one.
|
|
CompareMethodParamsInBaseAndSuper(ClassDecl, Method, true);
|
|
}
|
|
} 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 {
|
|
DC->addDecl(Method);
|
|
ClsMap[Method->getSelector()] = Method;
|
|
/// The following allows us to typecheck messages to "Class".
|
|
AddFactoryMethodToGlobalPool(Method);
|
|
// verify that the class method conforms to the same definition of
|
|
// parent methods if it shadows one.
|
|
CompareMethodParamsInBaseAndSuper(ClassDecl, Method, false);
|
|
}
|
|
}
|
|
}
|
|
if (ObjCInterfaceDecl *I = dyn_cast<ObjCInterfaceDecl>(ClassDecl)) {
|
|
// Compares properties declared in this class to those of its
|
|
// super class.
|
|
ComparePropertiesInBaseAndSuper(I);
|
|
CompareProperties(I, DeclPtrTy::make(I));
|
|
} 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.
|
|
|
|
// Compare protocol properties with those in category
|
|
CompareProperties(C, DeclPtrTy::make(C));
|
|
if (C->IsClassExtension())
|
|
DiagnoseClassExtensionDupMethods(C, C->getClassInterface());
|
|
}
|
|
if (ObjCContainerDecl *CDecl = dyn_cast<ObjCContainerDecl>(ClassDecl)) {
|
|
if (CDecl->getIdentifier())
|
|
// ProcessPropertyDecl is responsible for diagnosing conflicts with any
|
|
// user-defined setter/getter. It also synthesizes setter/getter methods
|
|
// and adds them to the DeclContext and global method pools.
|
|
for (ObjCContainerDecl::prop_iterator I = CDecl->prop_begin(),
|
|
E = CDecl->prop_end();
|
|
I != E; ++I)
|
|
ProcessPropertyDecl(*I, CDecl);
|
|
CDecl->setAtEndRange(AtEnd);
|
|
}
|
|
if (ObjCImplementationDecl *IC=dyn_cast<ObjCImplementationDecl>(ClassDecl)) {
|
|
IC->setAtEndRange(AtEnd);
|
|
if (ObjCInterfaceDecl* IDecl = IC->getClassInterface()) {
|
|
ImplMethodsVsClassMethods(IC, IDecl);
|
|
AtomicPropertySetterGetterRules(IC, IDecl);
|
|
if (LangOpts.ObjCNonFragileABI2)
|
|
while (IDecl->getSuperClass()) {
|
|
DiagnoseDuplicateIvars(IDecl, IDecl->getSuperClass());
|
|
IDecl = IDecl->getSuperClass();
|
|
}
|
|
}
|
|
SetIvarInitializers(IC);
|
|
} else if (ObjCCategoryImplDecl* CatImplClass =
|
|
dyn_cast<ObjCCategoryImplDecl>(ClassDecl)) {
|
|
CatImplClass->setAtEndRange(AtEnd);
|
|
|
|
// Find category interface decl and then check that all methods declared
|
|
// in this interface are implemented in the category @implementation.
|
|
if (ObjCInterfaceDecl* IDecl = CatImplClass->getClassInterface()) {
|
|
for (ObjCCategoryDecl *Categories = IDecl->getCategoryList();
|
|
Categories; Categories = Categories->getNextClassCategory()) {
|
|
if (Categories->getIdentifier() == CatImplClass->getIdentifier()) {
|
|
ImplMethodsVsClassMethods(CatImplClass, Categories);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (isInterfaceDeclKind) {
|
|
// Reject invalid vardecls.
|
|
for (unsigned i = 0; i != tuvNum; i++) {
|
|
DeclGroupRef DG = allTUVars[i].getAsVal<DeclGroupRef>();
|
|
for (DeclGroupRef::iterator I = DG.begin(), E = DG.end(); I != E; ++I)
|
|
if (VarDecl *VDecl = dyn_cast<VarDecl>(*I)) {
|
|
if (!VDecl->hasExternalStorage())
|
|
Diag(VDecl->getLocation(), diag::err_objc_var_decl_inclass);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/// 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;
|
|
}
|
|
|
|
static inline
|
|
bool containsInvalidMethodImplAttribute(const AttributeList *A) {
|
|
// The 'ibaction' attribute is allowed on method definitions because of
|
|
// how the IBAction macro is used on both method declarations and definitions.
|
|
// If the method definitions contains any other attributes, return true.
|
|
while (A && A->getKind() == AttributeList::AT_IBAction)
|
|
A = A->getNext();
|
|
return A != NULL;
|
|
}
|
|
|
|
Sema::DeclPtrTy Sema::ActOnMethodDeclaration(
|
|
SourceLocation MethodLoc, SourceLocation EndLoc,
|
|
tok::TokenKind MethodType, DeclPtrTy classDecl,
|
|
ObjCDeclSpec &ReturnQT, TypeTy *ReturnType,
|
|
Selector Sel,
|
|
// optional arguments. The number of types/arguments is obtained
|
|
// from the Sel.getNumArgs().
|
|
ObjCArgInfo *ArgInfo,
|
|
DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args
|
|
AttributeList *AttrList, tok::ObjCKeywordKind MethodDeclKind,
|
|
bool isVariadic) {
|
|
Decl *ClassDecl = classDecl.getAs<Decl>();
|
|
|
|
// Make sure we can establish a context for the method.
|
|
if (!ClassDecl) {
|
|
Diag(MethodLoc, diag::error_missing_method_context);
|
|
getLabelMap().clear();
|
|
return DeclPtrTy();
|
|
}
|
|
QualType resultDeclType;
|
|
|
|
TypeSourceInfo *ResultTInfo = 0;
|
|
if (ReturnType) {
|
|
resultDeclType = GetTypeFromParser(ReturnType, &ResultTInfo);
|
|
|
|
// Methods cannot return interface types. All ObjC objects are
|
|
// passed by reference.
|
|
if (resultDeclType->isObjCInterfaceType()) {
|
|
Diag(MethodLoc, diag::err_object_cannot_be_passed_returned_by_value)
|
|
<< 0 << resultDeclType;
|
|
return DeclPtrTy();
|
|
}
|
|
} else // get the type for "id".
|
|
resultDeclType = Context.getObjCIdType();
|
|
|
|
ObjCMethodDecl* ObjCMethod =
|
|
ObjCMethodDecl::Create(Context, MethodLoc, EndLoc, Sel, resultDeclType,
|
|
ResultTInfo,
|
|
cast<DeclContext>(ClassDecl),
|
|
MethodType == tok::minus, isVariadic,
|
|
false,
|
|
MethodDeclKind == tok::objc_optional ?
|
|
ObjCMethodDecl::Optional :
|
|
ObjCMethodDecl::Required);
|
|
|
|
llvm::SmallVector<ParmVarDecl*, 16> Params;
|
|
|
|
for (unsigned i = 0, e = Sel.getNumArgs(); i != e; ++i) {
|
|
QualType ArgType;
|
|
TypeSourceInfo *DI;
|
|
|
|
if (ArgInfo[i].Type == 0) {
|
|
ArgType = Context.getObjCIdType();
|
|
DI = 0;
|
|
} else {
|
|
ArgType = GetTypeFromParser(ArgInfo[i].Type, &DI);
|
|
// Perform the default array/function conversions (C99 6.7.5.3p[7,8]).
|
|
ArgType = adjustParameterType(ArgType);
|
|
}
|
|
|
|
ParmVarDecl* Param
|
|
= ParmVarDecl::Create(Context, ObjCMethod, ArgInfo[i].NameLoc,
|
|
ArgInfo[i].Name, ArgType, DI,
|
|
VarDecl::None, VarDecl::None, 0);
|
|
|
|
if (ArgType->isObjCInterfaceType()) {
|
|
Diag(ArgInfo[i].NameLoc,
|
|
diag::err_object_cannot_be_passed_returned_by_value)
|
|
<< 1 << ArgType;
|
|
Param->setInvalidDecl();
|
|
}
|
|
|
|
Param->setObjCDeclQualifier(
|
|
CvtQTToAstBitMask(ArgInfo[i].DeclSpec.getObjCDeclQualifier()));
|
|
|
|
// Apply the attributes to the parameter.
|
|
ProcessDeclAttributeList(TUScope, Param, ArgInfo[i].ArgAttrs);
|
|
|
|
Params.push_back(Param);
|
|
}
|
|
|
|
for (unsigned i = 0, e = CNumArgs; i != e; ++i) {
|
|
ParmVarDecl *Param = CParamInfo[i].Param.getAs<ParmVarDecl>();
|
|
QualType ArgType = Param->getType();
|
|
if (ArgType.isNull())
|
|
ArgType = Context.getObjCIdType();
|
|
else
|
|
// Perform the default array/function conversions (C99 6.7.5.3p[7,8]).
|
|
ArgType = adjustParameterType(ArgType);
|
|
if (ArgType->isObjCInterfaceType()) {
|
|
Diag(Param->getLocation(),
|
|
diag::err_object_cannot_be_passed_returned_by_value)
|
|
<< 1 << ArgType;
|
|
Param->setInvalidDecl();
|
|
}
|
|
Param->setDeclContext(ObjCMethod);
|
|
IdResolver.RemoveDecl(Param);
|
|
Params.push_back(Param);
|
|
}
|
|
|
|
ObjCMethod->setMethodParams(Context, Params.data(), Params.size(),
|
|
Sel.getNumArgs());
|
|
ObjCMethod->setObjCDeclQualifier(
|
|
CvtQTToAstBitMask(ReturnQT.getObjCDeclQualifier()));
|
|
const ObjCMethodDecl *PrevMethod = 0;
|
|
|
|
if (AttrList)
|
|
ProcessDeclAttributeList(TUScope, ObjCMethod, AttrList);
|
|
|
|
const ObjCMethodDecl *InterfaceMD = 0;
|
|
|
|
// 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);
|
|
}
|
|
InterfaceMD = ImpDecl->getClassInterface()->getMethod(Sel,
|
|
MethodType == tok::minus);
|
|
if (containsInvalidMethodImplAttribute(AttrList))
|
|
Diag(EndLoc, diag::warn_attribute_method_def);
|
|
} 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 (containsInvalidMethodImplAttribute(AttrList))
|
|
Diag(EndLoc, diag::warn_attribute_method_def);
|
|
}
|
|
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);
|
|
}
|
|
|
|
// If the interface declared this method, and it was deprecated there,
|
|
// mark it deprecated here.
|
|
if (InterfaceMD && InterfaceMD->hasAttr<DeprecatedAttr>())
|
|
ObjCMethod->addAttr(::new (Context) DeprecatedAttr());
|
|
|
|
return DeclPtrTy::make(ObjCMethod);
|
|
}
|
|
|
|
bool Sema::CheckObjCDeclScope(Decl *D) {
|
|
if (isa<TranslationUnitDecl>(CurContext->getLookupContext()))
|
|
return false;
|
|
|
|
Diag(D->getLocation(), diag::err_objc_decls_may_only_appear_in_global_scope);
|
|
D->setInvalidDecl();
|
|
|
|
return true;
|
|
}
|
|
|
|
/// Called whenever @defs(ClassName) is encountered in the source. Inserts the
|
|
/// instance variables of ClassName into Decls.
|
|
void Sema::ActOnDefs(Scope *S, DeclPtrTy TagD, SourceLocation DeclStart,
|
|
IdentifierInfo *ClassName,
|
|
llvm::SmallVectorImpl<DeclPtrTy> &Decls) {
|
|
// Check that ClassName is a valid class
|
|
ObjCInterfaceDecl *Class = getObjCInterfaceDecl(ClassName, DeclStart);
|
|
if (!Class) {
|
|
Diag(DeclStart, diag::err_undef_interface) << ClassName;
|
|
return;
|
|
}
|
|
if (LangOpts.ObjCNonFragileABI) {
|
|
Diag(DeclStart, diag::err_atdef_nonfragile_interface);
|
|
return;
|
|
}
|
|
|
|
// Collect the instance variables
|
|
llvm::SmallVector<FieldDecl*, 32> RecFields;
|
|
Context.CollectObjCIvars(Class, RecFields);
|
|
// For each ivar, create a fresh ObjCAtDefsFieldDecl.
|
|
for (unsigned i = 0; i < RecFields.size(); i++) {
|
|
FieldDecl* ID = RecFields[i];
|
|
RecordDecl *Record = dyn_cast<RecordDecl>(TagD.getAs<Decl>());
|
|
Decl *FD = ObjCAtDefsFieldDecl::Create(Context, Record, ID->getLocation(),
|
|
ID->getIdentifier(), ID->getType(),
|
|
ID->getBitWidth());
|
|
Decls.push_back(Sema::DeclPtrTy::make(FD));
|
|
}
|
|
|
|
// Introduce all of these fields into the appropriate scope.
|
|
for (llvm::SmallVectorImpl<DeclPtrTy>::iterator D = Decls.begin();
|
|
D != Decls.end(); ++D) {
|
|
FieldDecl *FD = cast<FieldDecl>(D->getAs<Decl>());
|
|
if (getLangOptions().CPlusPlus)
|
|
PushOnScopeChains(cast<FieldDecl>(FD), S);
|
|
else if (RecordDecl *Record = dyn_cast<RecordDecl>(TagD.getAs<Decl>()))
|
|
Record->addDecl(FD);
|
|
}
|
|
}
|
|
|
|
/// \brief Build a type-check a new Objective-C exception variable declaration.
|
|
VarDecl *Sema::BuildObjCExceptionDecl(TypeSourceInfo *TInfo,
|
|
QualType T,
|
|
IdentifierInfo *Name,
|
|
SourceLocation NameLoc,
|
|
bool Invalid) {
|
|
// ISO/IEC TR 18037 S6.7.3: "The type of an object with automatic storage
|
|
// duration shall not be qualified by an address-space qualifier."
|
|
// Since all parameters have automatic store duration, they can not have
|
|
// an address space.
|
|
if (T.getAddressSpace() != 0) {
|
|
Diag(NameLoc, diag::err_arg_with_address_space);
|
|
Invalid = true;
|
|
}
|
|
|
|
// An @catch parameter must be an unqualified object pointer type;
|
|
// FIXME: Recover from "NSObject foo" by inserting the * in "NSObject *foo"?
|
|
if (Invalid) {
|
|
// Don't do any further checking.
|
|
} else if (T->isDependentType()) {
|
|
// Okay: we don't know what this type will instantiate to.
|
|
} else if (!T->isObjCObjectPointerType()) {
|
|
Invalid = true;
|
|
Diag(NameLoc ,diag::err_catch_param_not_objc_type);
|
|
} else if (T->isObjCQualifiedIdType()) {
|
|
Invalid = true;
|
|
Diag(NameLoc, diag::err_illegal_qualifiers_on_catch_parm);
|
|
}
|
|
|
|
VarDecl *New = VarDecl::Create(Context, CurContext, NameLoc, Name, T, TInfo,
|
|
VarDecl::None, VarDecl::None);
|
|
New->setExceptionVariable(true);
|
|
|
|
if (Invalid)
|
|
New->setInvalidDecl();
|
|
return New;
|
|
}
|
|
|
|
Sema::DeclPtrTy Sema::ActOnObjCExceptionDecl(Scope *S, Declarator &D) {
|
|
const DeclSpec &DS = D.getDeclSpec();
|
|
|
|
// We allow the "register" storage class on exception variables because
|
|
// GCC did, but we drop it completely. Any other storage class is an error.
|
|
if (DS.getStorageClassSpec() == DeclSpec::SCS_register) {
|
|
Diag(DS.getStorageClassSpecLoc(), diag::warn_register_objc_catch_parm)
|
|
<< FixItHint::CreateRemoval(SourceRange(DS.getStorageClassSpecLoc()));
|
|
} else if (DS.getStorageClassSpec() != DeclSpec::SCS_unspecified) {
|
|
Diag(DS.getStorageClassSpecLoc(), diag::err_storage_spec_on_catch_parm)
|
|
<< DS.getStorageClassSpec();
|
|
}
|
|
if (D.getDeclSpec().isThreadSpecified())
|
|
Diag(D.getDeclSpec().getThreadSpecLoc(), diag::err_invalid_thread);
|
|
D.getMutableDeclSpec().ClearStorageClassSpecs();
|
|
|
|
DiagnoseFunctionSpecifiers(D);
|
|
|
|
// Check that there are no default arguments inside the type of this
|
|
// exception object (C++ only).
|
|
if (getLangOptions().CPlusPlus)
|
|
CheckExtraCXXDefaultArguments(D);
|
|
|
|
TypeSourceInfo *TInfo = 0;
|
|
TagDecl *OwnedDecl = 0;
|
|
QualType ExceptionType = GetTypeForDeclarator(D, S, &TInfo, &OwnedDecl);
|
|
|
|
if (getLangOptions().CPlusPlus && OwnedDecl && OwnedDecl->isDefinition()) {
|
|
// Objective-C++: Types shall not be defined in exception types.
|
|
Diag(OwnedDecl->getLocation(), diag::err_type_defined_in_param_type)
|
|
<< Context.getTypeDeclType(OwnedDecl);
|
|
}
|
|
|
|
VarDecl *New = BuildObjCExceptionDecl(TInfo, ExceptionType, D.getIdentifier(),
|
|
D.getIdentifierLoc(),
|
|
D.isInvalidType());
|
|
|
|
// Parameter declarators cannot be qualified (C++ [dcl.meaning]p1).
|
|
if (D.getCXXScopeSpec().isSet()) {
|
|
Diag(D.getIdentifierLoc(), diag::err_qualified_objc_catch_parm)
|
|
<< D.getCXXScopeSpec().getRange();
|
|
New->setInvalidDecl();
|
|
}
|
|
|
|
// Add the parameter declaration into this scope.
|
|
S->AddDecl(DeclPtrTy::make(New));
|
|
if (D.getIdentifier())
|
|
IdResolver.AddDecl(New);
|
|
|
|
ProcessDeclAttributes(S, New, D);
|
|
|
|
if (New->hasAttr<BlocksAttr>())
|
|
Diag(New->getLocation(), diag::err_block_on_nonlocal);
|
|
return DeclPtrTy::make(New);
|
|
}
|
|
|
|
/// CollectIvarsToConstructOrDestruct - Collect those ivars which require
|
|
/// initialization.
|
|
void Sema::CollectIvarsToConstructOrDestruct(const ObjCInterfaceDecl *OI,
|
|
llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) {
|
|
for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(),
|
|
E = OI->ivar_end(); I != E; ++I) {
|
|
ObjCIvarDecl *Iv = (*I);
|
|
QualType QT = Context.getBaseElementType(Iv->getType());
|
|
if (isa<RecordType>(QT))
|
|
Ivars.push_back(*I);
|
|
}
|
|
|
|
// Find ivars to construct/destruct in class extension.
|
|
if (const ObjCCategoryDecl *CDecl = OI->getClassExtension()) {
|
|
for (ObjCCategoryDecl::ivar_iterator I = CDecl->ivar_begin(),
|
|
E = CDecl->ivar_end(); I != E; ++I) {
|
|
ObjCIvarDecl *Iv = (*I);
|
|
QualType QT = Context.getBaseElementType(Iv->getType());
|
|
if (isa<RecordType>(QT))
|
|
Ivars.push_back(*I);
|
|
}
|
|
}
|
|
|
|
// Also add any ivar defined in this class's implementation. This
|
|
// includes synthesized ivars.
|
|
if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) {
|
|
for (ObjCImplementationDecl::ivar_iterator I = ImplDecl->ivar_begin(),
|
|
E = ImplDecl->ivar_end(); I != E; ++I) {
|
|
ObjCIvarDecl *Iv = (*I);
|
|
QualType QT = Context.getBaseElementType(Iv->getType());
|
|
if (isa<RecordType>(QT))
|
|
Ivars.push_back(*I);
|
|
}
|
|
}
|
|
}
|
|
|
|
void ObjCImplementationDecl::setIvarInitializers(ASTContext &C,
|
|
CXXBaseOrMemberInitializer ** initializers,
|
|
unsigned numInitializers) {
|
|
if (numInitializers > 0) {
|
|
NumIvarInitializers = numInitializers;
|
|
CXXBaseOrMemberInitializer **ivarInitializers =
|
|
new (C) CXXBaseOrMemberInitializer*[NumIvarInitializers];
|
|
memcpy(ivarInitializers, initializers,
|
|
numInitializers * sizeof(CXXBaseOrMemberInitializer*));
|
|
IvarInitializers = ivarInitializers;
|
|
}
|
|
}
|
|
|