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-rw-r--r--clang/lib/Sema/SemaPseudoObject.cpp505
1 files changed, 505 insertions, 0 deletions
diff --git a/clang/lib/Sema/SemaPseudoObject.cpp b/clang/lib/Sema/SemaPseudoObject.cpp
index d5f1523f62a..c51eb3f4956 100644
--- a/clang/lib/Sema/SemaPseudoObject.cpp
+++ b/clang/lib/Sema/SemaPseudoObject.cpp
@@ -130,6 +130,28 @@ namespace {
}
};
+ struct ObjCSubscriptRefRebuilder : Rebuilder<ObjCSubscriptRefRebuilder> {
+ Expr *NewBase;
+ Expr *NewKeyExpr;
+ ObjCSubscriptRefRebuilder(Sema &S, Expr *newBase, Expr *newKeyExpr)
+ : Rebuilder<ObjCSubscriptRefRebuilder>(S),
+ NewBase(newBase), NewKeyExpr(newKeyExpr) {}
+
+ typedef ObjCSubscriptRefExpr specific_type;
+ Expr *rebuildSpecific(ObjCSubscriptRefExpr *refExpr) {
+ assert(refExpr->getBaseExpr());
+ assert(refExpr->getKeyExpr());
+
+ return new (S.Context)
+ ObjCSubscriptRefExpr(NewBase,
+ NewKeyExpr,
+ refExpr->getType(), refExpr->getValueKind(),
+ refExpr->getObjectKind(),refExpr->getAtIndexMethodDecl(),
+ refExpr->setAtIndexMethodDecl(),
+ refExpr->getRBracket());
+ }
+ };
+
class PseudoOpBuilder {
public:
Sema &S;
@@ -215,6 +237,39 @@ namespace {
ExprResult buildGet();
ExprResult buildSet(Expr *op, SourceLocation, bool);
};
+
+ /// A PseudoOpBuilder for Objective-C array/dictionary indexing.
+ class ObjCSubscriptOpBuilder : public PseudoOpBuilder {
+ ObjCSubscriptRefExpr *RefExpr;
+ OpaqueValueExpr *InstanceBase;
+ OpaqueValueExpr *InstanceKey;
+ ObjCMethodDecl *AtIndexGetter;
+ Selector AtIndexGetterSelector;
+
+ ObjCMethodDecl *AtIndexSetter;
+ Selector AtIndexSetterSelector;
+
+ public:
+ ObjCSubscriptOpBuilder(Sema &S, ObjCSubscriptRefExpr *refExpr) :
+ PseudoOpBuilder(S, refExpr->getSourceRange().getBegin()),
+ RefExpr(refExpr),
+ InstanceBase(0), InstanceKey(0),
+ AtIndexGetter(0), AtIndexSetter(0) { }
+
+ ExprResult buildRValueOperation(Expr *op);
+ ExprResult buildAssignmentOperation(Scope *Sc,
+ SourceLocation opLoc,
+ BinaryOperatorKind opcode,
+ Expr *LHS, Expr *RHS);
+ Expr *rebuildAndCaptureObject(Expr *syntacticBase);
+
+ bool findAtIndexGetter();
+ bool findAtIndexSetter();
+
+ ExprResult buildGet();
+ ExprResult buildSet(Expr *op, SourceLocation, bool);
+ };
+
}
/// Capture the given expression in an OpaqueValueExpr.
@@ -718,6 +773,438 @@ ObjCPropertyOpBuilder::buildIncDecOperation(Scope *Sc, SourceLocation opcLoc,
return PseudoOpBuilder::buildIncDecOperation(Sc, opcLoc, opcode, op);
}
+// ObjCSubscript build stuff.
+//
+
+/// objective-c subscripting-specific behavior for doing lvalue-to-rvalue
+/// conversion.
+/// FIXME. Remove this routine if it is proven that no additional
+/// specifity is needed.
+ExprResult ObjCSubscriptOpBuilder::buildRValueOperation(Expr *op) {
+ ExprResult result = PseudoOpBuilder::buildRValueOperation(op);
+ if (result.isInvalid()) return ExprError();
+ return result;
+}
+
+/// objective-c subscripting-specific behavior for doing assignments.
+ExprResult
+ObjCSubscriptOpBuilder::buildAssignmentOperation(Scope *Sc,
+ SourceLocation opcLoc,
+ BinaryOperatorKind opcode,
+ Expr *LHS, Expr *RHS) {
+ assert(BinaryOperator::isAssignmentOp(opcode));
+ // There must be a method to do the Index'ed assignment.
+ if (!findAtIndexSetter())
+ return ExprError();
+
+ // Verify that we can do a compound assignment.
+ if (opcode != BO_Assign && !findAtIndexGetter())
+ return ExprError();
+
+ ExprResult result =
+ PseudoOpBuilder::buildAssignmentOperation(Sc, opcLoc, opcode, LHS, RHS);
+ if (result.isInvalid()) return ExprError();
+
+ // Various warnings about objc Index'ed assignments in ARC.
+ if (S.getLangOptions().ObjCAutoRefCount && InstanceBase) {
+ S.checkRetainCycles(InstanceBase->getSourceExpr(), RHS);
+ S.checkUnsafeExprAssigns(opcLoc, LHS, RHS);
+ }
+
+ return result;
+}
+
+/// Capture the base object of an Objective-C Index'ed expression.
+Expr *ObjCSubscriptOpBuilder::rebuildAndCaptureObject(Expr *syntacticBase) {
+ assert(InstanceBase == 0);
+
+ // Capture base expression in an OVE and rebuild the syntactic
+ // form to use the OVE as its base expression.
+ InstanceBase = capture(RefExpr->getBaseExpr());
+ InstanceKey = capture(RefExpr->getKeyExpr());
+
+ syntacticBase =
+ ObjCSubscriptRefRebuilder(S, InstanceBase,
+ InstanceKey).rebuild(syntacticBase);
+
+ return syntacticBase;
+}
+
+/// CheckSubscriptingKind - This routine decide what type
+/// of indexing represented by "FromE" is being done.
+Sema::ObjCSubscriptKind
+ Sema::CheckSubscriptingKind(Expr *FromE) {
+ // If the expression already has integral or enumeration type, we're golden.
+ QualType T = FromE->getType();
+ if (T->isIntegralOrEnumerationType())
+ return OS_Array;
+
+ // If we don't have a class type in C++, there's no way we can get an
+ // expression of integral or enumeration type.
+ const RecordType *RecordTy = T->getAs<RecordType>();
+ if (!RecordTy)
+ // All other scalar cases are assumed to be dictionary indexing which
+ // caller handles, with diagnostics if needed.
+ return OS_Dictionary;
+ if (!getLangOptions().CPlusPlus || RecordTy->isIncompleteType()) {
+ // No indexing can be done. Issue diagnostics and quit.
+ Diag(FromE->getExprLoc(), diag::err_objc_subscript_type_conversion)
+ << FromE->getType();
+ return OS_Error;
+ }
+
+ // We must have a complete class type.
+ if (RequireCompleteType(FromE->getExprLoc(), T,
+ PDiag(diag::err_objc_index_incomplete_class_type)
+ << FromE->getSourceRange()))
+ return OS_Error;
+
+ // Look for a conversion to an integral, enumeration type, or
+ // objective-C pointer type.
+ UnresolvedSet<4> ViableConversions;
+ UnresolvedSet<4> ExplicitConversions;
+ const UnresolvedSetImpl *Conversions
+ = cast<CXXRecordDecl>(RecordTy->getDecl())->getVisibleConversionFunctions();
+
+ int NoIntegrals=0, NoObjCIdPointers=0;
+ SmallVector<CXXConversionDecl *, 4> ConversionDecls;
+
+ for (UnresolvedSetImpl::iterator I = Conversions->begin(),
+ E = Conversions->end();
+ I != E;
+ ++I) {
+ if (CXXConversionDecl *Conversion
+ = dyn_cast<CXXConversionDecl>((*I)->getUnderlyingDecl())) {
+ QualType CT = Conversion->getConversionType().getNonReferenceType();
+ if (CT->isIntegralOrEnumerationType()) {
+ ++NoIntegrals;
+ ConversionDecls.push_back(Conversion);
+ }
+ else if (CT->isObjCIdType() ||CT->isBlockPointerType()) {
+ ++NoObjCIdPointers;
+ ConversionDecls.push_back(Conversion);
+ }
+ }
+ }
+ if (NoIntegrals ==1 && NoObjCIdPointers == 0)
+ return OS_Array;
+ if (NoIntegrals == 0 && NoObjCIdPointers == 1)
+ return OS_Dictionary;
+ if (NoIntegrals == 0 && NoObjCIdPointers == 0) {
+ // No conversion function was found. Issue diagnostic and return.
+ Diag(FromE->getExprLoc(), diag::err_objc_subscript_type_conversion)
+ << FromE->getType();
+ return OS_Error;
+ }
+ Diag(FromE->getExprLoc(), diag::err_objc_multiple_subscript_type_conversion)
+ << FromE->getType();
+ for (unsigned int i = 0; i < ConversionDecls.size(); i++)
+ Diag(ConversionDecls[i]->getLocation(), diag::not_conv_function_declared_at);
+
+ return OS_Error;
+}
+
+bool ObjCSubscriptOpBuilder::findAtIndexGetter() {
+ if (AtIndexGetter)
+ return true;
+
+ Expr *BaseExpr = RefExpr->getBaseExpr();
+ QualType BaseT = BaseExpr->getType();
+
+ QualType ResultType;
+ if (const ObjCObjectPointerType *PTy =
+ BaseT->getAs<ObjCObjectPointerType>()) {
+ ResultType = PTy->getPointeeType();
+ if (const ObjCObjectType *iQFaceTy =
+ ResultType->getAsObjCQualifiedInterfaceType())
+ ResultType = iQFaceTy->getBaseType();
+ }
+ Sema::ObjCSubscriptKind Res =
+ S.CheckSubscriptingKind(RefExpr->getKeyExpr());
+ if (Res == Sema::OS_Error)
+ return false;
+ bool arrayRef = (Res == Sema::OS_Array);
+
+ if (ResultType.isNull()) {
+ S.Diag(BaseExpr->getExprLoc(), diag::err_objc_subscript_base_type)
+ << BaseExpr->getType() << arrayRef;
+ return false;
+ }
+ if (!arrayRef) {
+ // dictionary subscripting.
+ // - (id)objectForKeyedSubscript:(id)key;
+ IdentifierInfo *KeyIdents[] = {
+ &S.Context.Idents.get("objectForKeyedSubscript")
+ };
+ AtIndexGetterSelector = S.Context.Selectors.getSelector(1, KeyIdents);
+ }
+ else {
+ // - (id)objectAtIndexedSubscript:(size_t)index;
+ IdentifierInfo *KeyIdents[] = {
+ &S.Context.Idents.get("objectAtIndexedSubscript")
+ };
+
+ AtIndexGetterSelector = S.Context.Selectors.getSelector(1, KeyIdents);
+ }
+
+ AtIndexGetter = S.LookupMethodInObjectType(AtIndexGetterSelector, ResultType,
+ true /*instance*/);
+ bool receiverIdType = (BaseT->isObjCIdType() ||
+ BaseT->isObjCQualifiedIdType());
+
+ if (!AtIndexGetter && S.getLangOptions().DebuggerObjCLiteral) {
+ AtIndexGetter = ObjCMethodDecl::Create(S.Context, SourceLocation(),
+ SourceLocation(), AtIndexGetterSelector,
+ S.Context.getObjCIdType() /*ReturnType*/,
+ 0 /*TypeSourceInfo */,
+ S.Context.getTranslationUnitDecl(),
+ true /*Instance*/, false/*isVariadic*/,
+ /*isSynthesized=*/false,
+ /*isImplicitlyDeclared=*/true, /*isDefined=*/false,
+ ObjCMethodDecl::Required,
+ false);
+ ParmVarDecl *Argument = ParmVarDecl::Create(S.Context, AtIndexGetter,
+ SourceLocation(), SourceLocation(),
+ arrayRef ? &S.Context.Idents.get("index")
+ : &S.Context.Idents.get("key"),
+ arrayRef ? S.Context.UnsignedLongTy
+ : S.Context.getObjCIdType(),
+ /*TInfo=*/0,
+ SC_None,
+ SC_None,
+ 0);
+ AtIndexGetter->setMethodParams(S.Context, Argument,
+ ArrayRef<SourceLocation>());
+ }
+
+ if (!AtIndexGetter) {
+ if (!receiverIdType) {
+ S.Diag(BaseExpr->getExprLoc(), diag::err_objc_subscript_method_not_found)
+ << BaseExpr->getType() << 0 << arrayRef;
+ return false;
+ }
+ AtIndexGetter =
+ S.LookupInstanceMethodInGlobalPool(AtIndexGetterSelector,
+ RefExpr->getSourceRange(),
+ true, false);
+ }
+
+ if (AtIndexGetter) {
+ QualType T = AtIndexGetter->param_begin()[0]->getType();
+ if ((arrayRef && !T->isIntegralOrEnumerationType()) ||
+ (!arrayRef && !T->isObjCObjectPointerType())) {
+ S.Diag(RefExpr->getKeyExpr()->getExprLoc(),
+ arrayRef ? diag::err_objc_subscript_index_type
+ : diag::err_objc_subscript_key_type) << T;
+ S.Diag(AtIndexGetter->param_begin()[0]->getLocation(),
+ diag::note_parameter_type) << T;
+ return false;
+ }
+ QualType R = AtIndexGetter->getResultType();
+ if (!R->isObjCObjectPointerType()) {
+ S.Diag(RefExpr->getKeyExpr()->getExprLoc(),
+ diag::err_objc_indexing_method_result_type) << R << arrayRef;
+ S.Diag(AtIndexGetter->getLocation(), diag::note_method_declared_at) <<
+ AtIndexGetter->getDeclName();
+ }
+ }
+ return true;
+}
+
+bool ObjCSubscriptOpBuilder::findAtIndexSetter() {
+ if (AtIndexSetter)
+ return true;
+
+ Expr *BaseExpr = RefExpr->getBaseExpr();
+ QualType BaseT = BaseExpr->getType();
+
+ QualType ResultType;
+ if (const ObjCObjectPointerType *PTy =
+ BaseT->getAs<ObjCObjectPointerType>()) {
+ ResultType = PTy->getPointeeType();
+ if (const ObjCObjectType *iQFaceTy =
+ ResultType->getAsObjCQualifiedInterfaceType())
+ ResultType = iQFaceTy->getBaseType();
+ }
+
+ Sema::ObjCSubscriptKind Res =
+ S.CheckSubscriptingKind(RefExpr->getKeyExpr());
+ if (Res == Sema::OS_Error)
+ return false;
+ bool arrayRef = (Res == Sema::OS_Array);
+
+ if (ResultType.isNull()) {
+ S.Diag(BaseExpr->getExprLoc(), diag::err_objc_subscript_base_type)
+ << BaseExpr->getType() << arrayRef;
+ return false;
+ }
+
+ if (!arrayRef) {
+ // dictionary subscripting.
+ // - (void)setObject:(id)object forKeyedSubscript:(id)key;
+ IdentifierInfo *KeyIdents[] = {
+ &S.Context.Idents.get("setObject"),
+ &S.Context.Idents.get("forKeyedSubscript")
+ };
+ AtIndexSetterSelector = S.Context.Selectors.getSelector(2, KeyIdents);
+ }
+ else {
+ // - (void)setObject:(id)object atIndexedSubscript:(NSInteger)index;
+ IdentifierInfo *KeyIdents[] = {
+ &S.Context.Idents.get("setObject"),
+ &S.Context.Idents.get("atIndexedSubscript")
+ };
+ AtIndexSetterSelector = S.Context.Selectors.getSelector(2, KeyIdents);
+ }
+ AtIndexSetter = S.LookupMethodInObjectType(AtIndexSetterSelector, ResultType,
+ true /*instance*/);
+
+ bool receiverIdType = (BaseT->isObjCIdType() ||
+ BaseT->isObjCQualifiedIdType());
+
+ if (!AtIndexSetter && S.getLangOptions().DebuggerObjCLiteral) {
+ TypeSourceInfo *ResultTInfo = 0;
+ QualType ReturnType = S.Context.VoidTy;
+ AtIndexSetter = ObjCMethodDecl::Create(S.Context, SourceLocation(),
+ SourceLocation(), AtIndexSetterSelector,
+ ReturnType,
+ ResultTInfo,
+ S.Context.getTranslationUnitDecl(),
+ true /*Instance*/, false/*isVariadic*/,
+ /*isSynthesized=*/false,
+ /*isImplicitlyDeclared=*/true, /*isDefined=*/false,
+ ObjCMethodDecl::Required,
+ false);
+ SmallVector<ParmVarDecl *, 2> Params;
+ ParmVarDecl *object = ParmVarDecl::Create(S.Context, AtIndexSetter,
+ SourceLocation(), SourceLocation(),
+ &S.Context.Idents.get("object"),
+ S.Context.getObjCIdType(),
+ /*TInfo=*/0,
+ SC_None,
+ SC_None,
+ 0);
+ Params.push_back(object);
+ ParmVarDecl *key = ParmVarDecl::Create(S.Context, AtIndexSetter,
+ SourceLocation(), SourceLocation(),
+ arrayRef ? &S.Context.Idents.get("index")
+ : &S.Context.Idents.get("key"),
+ arrayRef ? S.Context.UnsignedLongTy
+ : S.Context.getObjCIdType(),
+ /*TInfo=*/0,
+ SC_None,
+ SC_None,
+ 0);
+ Params.push_back(key);
+ AtIndexSetter->setMethodParams(S.Context, Params, ArrayRef<SourceLocation>());
+ }
+
+ if (!AtIndexSetter) {
+ if (!receiverIdType) {
+ S.Diag(BaseExpr->getExprLoc(),
+ diag::err_objc_subscript_method_not_found)
+ << BaseExpr->getType() << 1 << arrayRef;
+ return false;
+ }
+ AtIndexSetter =
+ S.LookupInstanceMethodInGlobalPool(AtIndexSetterSelector,
+ RefExpr->getSourceRange(),
+ true, false);
+ }
+
+ bool err = false;
+ if (AtIndexSetter && arrayRef) {
+ QualType T = AtIndexSetter->param_begin()[1]->getType();
+ if (!T->isIntegralOrEnumerationType()) {
+ S.Diag(RefExpr->getKeyExpr()->getExprLoc(),
+ diag::err_objc_subscript_index_type) << T;
+ S.Diag(AtIndexSetter->param_begin()[1]->getLocation(),
+ diag::note_parameter_type) << T;
+ err = true;
+ }
+ T = AtIndexSetter->param_begin()[0]->getType();
+ if (!T->isObjCObjectPointerType()) {
+ S.Diag(RefExpr->getBaseExpr()->getExprLoc(),
+ diag::err_objc_subscript_object_type) << T << arrayRef;
+ S.Diag(AtIndexSetter->param_begin()[0]->getLocation(),
+ diag::note_parameter_type) << T;
+ err = true;
+ }
+ }
+ else if (AtIndexSetter && !arrayRef)
+ for (unsigned i=0; i <2; i++) {
+ QualType T = AtIndexSetter->param_begin()[i]->getType();
+ if (!T->isObjCObjectPointerType()) {
+ if (i == 1)
+ S.Diag(RefExpr->getKeyExpr()->getExprLoc(),
+ diag::err_objc_subscript_key_type) << T;
+ else
+ S.Diag(RefExpr->getBaseExpr()->getExprLoc(),
+ diag::err_objc_subscript_dic_object_type) << T;
+ S.Diag(AtIndexSetter->param_begin()[i]->getLocation(),
+ diag::note_parameter_type) << T;
+ err = true;
+ }
+ }
+
+ return !err;
+}
+
+// Get the object at "Index" position in the container.
+// [BaseExpr objectAtIndexedSubscript : IndexExpr];
+ExprResult ObjCSubscriptOpBuilder::buildGet() {
+ if (!findAtIndexGetter())
+ return ExprError();
+
+ QualType receiverType = InstanceBase->getType();
+
+ // Build a message-send.
+ ExprResult msg;
+ Expr *Index = InstanceKey;
+
+ // Arguments.
+ Expr *args[] = { Index };
+ assert(InstanceBase);
+ msg = S.BuildInstanceMessageImplicit(InstanceBase, receiverType,
+ GenericLoc,
+ AtIndexGetterSelector, AtIndexGetter,
+ MultiExprArg(args, 1));
+ return msg;
+}
+
+/// Store into the container the "op" object at "Index"'ed location
+/// by building this messaging expression:
+/// - (void)setObject:(id)object atIndexedSubscript:(NSInteger)index;
+/// \param bindSetValueAsResult - If true, capture the actual
+/// value being set as the value of the property operation.
+ExprResult ObjCSubscriptOpBuilder::buildSet(Expr *op, SourceLocation opcLoc,
+ bool captureSetValueAsResult) {
+ if (!findAtIndexSetter())
+ return ExprError();
+
+ QualType receiverType = InstanceBase->getType();
+ Expr *Index = InstanceKey;
+
+ // Arguments.
+ Expr *args[] = { op, Index };
+
+ // Build a message-send.
+ ExprResult msg = S.BuildInstanceMessageImplicit(InstanceBase, receiverType,
+ GenericLoc,
+ AtIndexSetterSelector,
+ AtIndexSetter,
+ MultiExprArg(args, 2));
+
+ if (!msg.isInvalid() && captureSetValueAsResult) {
+ ObjCMessageExpr *msgExpr =
+ cast<ObjCMessageExpr>(msg.get()->IgnoreImplicit());
+ Expr *arg = msgExpr->getArg(0);
+ msgExpr->setArg(0, captureValueAsResult(arg));
+ }
+
+ return msg;
+}
+
//===----------------------------------------------------------------------===//
// General Sema routines.
//===----------------------------------------------------------------------===//
@@ -728,6 +1215,11 @@ ExprResult Sema::checkPseudoObjectRValue(Expr *E) {
= dyn_cast<ObjCPropertyRefExpr>(opaqueRef)) {
ObjCPropertyOpBuilder builder(*this, refExpr);
return builder.buildRValueOperation(E);
+ }
+ else if (ObjCSubscriptRefExpr *refExpr
+ = dyn_cast<ObjCSubscriptRefExpr>(opaqueRef)) {
+ ObjCSubscriptOpBuilder builder(*this, refExpr);
+ return builder.buildRValueOperation(E);
} else {
llvm_unreachable("unknown pseudo-object kind!");
}
@@ -747,6 +1239,9 @@ ExprResult Sema::checkPseudoObjectIncDec(Scope *Sc, SourceLocation opcLoc,
= dyn_cast<ObjCPropertyRefExpr>(opaqueRef)) {
ObjCPropertyOpBuilder builder(*this, refExpr);
return builder.buildIncDecOperation(Sc, opcLoc, opcode, op);
+ } else if (isa<ObjCSubscriptRefExpr>(opaqueRef)) {
+ Diag(opcLoc, diag::err_illegal_container_subscripting_op);
+ return ExprError();
} else {
llvm_unreachable("unknown pseudo-object kind!");
}
@@ -772,6 +1267,10 @@ ExprResult Sema::checkPseudoObjectAssignment(Scope *S, SourceLocation opcLoc,
= dyn_cast<ObjCPropertyRefExpr>(opaqueRef)) {
ObjCPropertyOpBuilder builder(*this, refExpr);
return builder.buildAssignmentOperation(S, opcLoc, opcode, LHS, RHS);
+ } else if (ObjCSubscriptRefExpr *refExpr
+ = dyn_cast<ObjCSubscriptRefExpr>(opaqueRef)) {
+ ObjCSubscriptOpBuilder builder(*this, refExpr);
+ return builder.buildAssignmentOperation(S, opcLoc, opcode, LHS, RHS);
} else {
llvm_unreachable("unknown pseudo-object kind!");
}
@@ -786,6 +1285,12 @@ static Expr *stripOpaqueValuesFromPseudoObjectRef(Sema &S, Expr *E) {
= dyn_cast<ObjCPropertyRefExpr>(opaqueRef)) {
OpaqueValueExpr *baseOVE = cast<OpaqueValueExpr>(refExpr->getBase());
return ObjCPropertyRefRebuilder(S, baseOVE->getSourceExpr()).rebuild(E);
+ } else if (ObjCSubscriptRefExpr *refExpr
+ = dyn_cast<ObjCSubscriptRefExpr>(opaqueRef)) {
+ OpaqueValueExpr *baseOVE = cast<OpaqueValueExpr>(refExpr->getBaseExpr());
+ OpaqueValueExpr *keyOVE = cast<OpaqueValueExpr>(refExpr->getKeyExpr());
+ return ObjCSubscriptRefRebuilder(S, baseOVE->getSourceExpr(),
+ keyOVE->getSourceExpr()).rebuild(E);
} else {
llvm_unreachable("unknown pseudo-object kind!");
}
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