#include "config.h"
#include "ObjectConstructor.h"
+#include "ButterflyInlines.h"
+#include "CopiedSpaceInlines.h"
+#include "Error.h"
+#include "ExceptionHelpers.h"
+#include "JSFunction.h"
+#include "JSArray.h"
#include "JSGlobalObject.h"
+#include "Lookup.h"
#include "ObjectPrototype.h"
+#include "Operations.h"
+#include "PropertyDescriptor.h"
+#include "PropertyNameArray.h"
namespace JSC {
-ASSERT_CLASS_FITS_IN_CELL(ObjectConstructor);
+static EncodedJSValue JSC_HOST_CALL objectConstructorGetPrototypeOf(ExecState*);
+static EncodedJSValue JSC_HOST_CALL objectConstructorGetOwnPropertyDescriptor(ExecState*);
+static EncodedJSValue JSC_HOST_CALL objectConstructorGetOwnPropertyNames(ExecState*);
+static EncodedJSValue JSC_HOST_CALL objectConstructorKeys(ExecState*);
+static EncodedJSValue JSC_HOST_CALL objectConstructorDefineProperty(ExecState*);
+static EncodedJSValue JSC_HOST_CALL objectConstructorDefineProperties(ExecState*);
+static EncodedJSValue JSC_HOST_CALL objectConstructorCreate(ExecState*);
+static EncodedJSValue JSC_HOST_CALL objectConstructorSeal(ExecState*);
+static EncodedJSValue JSC_HOST_CALL objectConstructorFreeze(ExecState*);
+static EncodedJSValue JSC_HOST_CALL objectConstructorPreventExtensions(ExecState*);
+static EncodedJSValue JSC_HOST_CALL objectConstructorIsSealed(ExecState*);
+static EncodedJSValue JSC_HOST_CALL objectConstructorIsFrozen(ExecState*);
+static EncodedJSValue JSC_HOST_CALL objectConstructorIsExtensible(ExecState*);
-ObjectConstructor::ObjectConstructor(ExecState* exec, PassRefPtr<Structure> structure, ObjectPrototype* objectPrototype)
- : InternalFunction(&exec->globalData(), structure, Identifier(exec, "Object"))
+}
+
+#include "ObjectConstructor.lut.h"
+
+namespace JSC {
+
+ASSERT_HAS_TRIVIAL_DESTRUCTOR(ObjectConstructor);
+
+const ClassInfo ObjectConstructor::s_info = { "Function", &InternalFunction::s_info, 0, ExecState::objectConstructorTable, CREATE_METHOD_TABLE(ObjectConstructor) };
+
+/* Source for ObjectConstructor.lut.h
+@begin objectConstructorTable
+ getPrototypeOf objectConstructorGetPrototypeOf DontEnum|Function 1
+ getOwnPropertyDescriptor objectConstructorGetOwnPropertyDescriptor DontEnum|Function 2
+ getOwnPropertyNames objectConstructorGetOwnPropertyNames DontEnum|Function 1
+ keys objectConstructorKeys DontEnum|Function 1
+ defineProperty objectConstructorDefineProperty DontEnum|Function 3
+ defineProperties objectConstructorDefineProperties DontEnum|Function 2
+ create objectConstructorCreate DontEnum|Function 2
+ seal objectConstructorSeal DontEnum|Function 1
+ freeze objectConstructorFreeze DontEnum|Function 1
+ preventExtensions objectConstructorPreventExtensions DontEnum|Function 1
+ isSealed objectConstructorIsSealed DontEnum|Function 1
+ isFrozen objectConstructorIsFrozen DontEnum|Function 1
+ isExtensible objectConstructorIsExtensible DontEnum|Function 1
+@end
+*/
+
+ObjectConstructor::ObjectConstructor(JSGlobalObject* globalObject, Structure* structure)
+ : InternalFunction(globalObject, structure)
{
- // ECMA 15.2.3.1
- putDirectWithoutTransition(exec->propertyNames().prototype, objectPrototype, DontEnum | DontDelete | ReadOnly);
+}
+void ObjectConstructor::finishCreation(ExecState* exec, ObjectPrototype* objectPrototype)
+{
+ Base::finishCreation(exec->vm(), Identifier(exec, "Object").string());
+ // ECMA 15.2.3.1
+ putDirectWithoutTransition(exec->vm(), exec->propertyNames().prototype, objectPrototype, DontEnum | DontDelete | ReadOnly);
// no. of arguments for constructor
- putDirectWithoutTransition(exec->propertyNames().length, jsNumber(exec, 1), ReadOnly | DontEnum | DontDelete);
+ putDirectWithoutTransition(exec->vm(), exec->propertyNames().length, jsNumber(1), ReadOnly | DontEnum | DontDelete);
+}
+
+bool ObjectConstructor::getOwnPropertySlot(JSCell* cell, ExecState* exec, PropertyName propertyName, PropertySlot &slot)
+{
+ return getStaticFunctionSlot<JSObject>(exec, ExecState::objectConstructorTable(exec), jsCast<ObjectConstructor*>(cell), propertyName, slot);
}
-// ECMA 15.2.2
-static ALWAYS_INLINE JSObject* constructObject(ExecState* exec, const ArgList& args)
+bool ObjectConstructor::getOwnPropertyDescriptor(JSObject* object, ExecState* exec, PropertyName propertyName, PropertyDescriptor& descriptor)
{
- JSValuePtr arg = args.at(exec, 0);
+ return getStaticFunctionDescriptor<JSObject>(exec, ExecState::objectConstructorTable(exec), jsCast<ObjectConstructor*>(object), propertyName, descriptor);
+}
+
+static ALWAYS_INLINE JSObject* constructObject(ExecState* exec)
+{
+ JSGlobalObject* globalObject = exec->callee()->globalObject();
+ ArgList args(exec);
+ JSValue arg = args.at(0);
if (arg.isUndefinedOrNull())
- return new (exec) JSObject(exec->lexicalGlobalObject()->emptyObjectStructure());
- return arg.toObject(exec);
+ return constructEmptyObject(exec, globalObject->objectPrototype());
+ return arg.toObject(exec, globalObject);
}
-static JSObject* constructWithObjectConstructor(ExecState* exec, JSObject*, const ArgList& args)
+static EncodedJSValue JSC_HOST_CALL constructWithObjectConstructor(ExecState* exec)
{
- return constructObject(exec, args);
+ return JSValue::encode(constructObject(exec));
}
-ConstructType ObjectConstructor::getConstructData(ConstructData& constructData)
+ConstructType ObjectConstructor::getConstructData(JSCell*, ConstructData& constructData)
{
constructData.native.function = constructWithObjectConstructor;
return ConstructTypeHost;
}
-static JSValuePtr callObjectConstructor(ExecState* exec, JSObject*, JSValuePtr, const ArgList& args)
+static EncodedJSValue JSC_HOST_CALL callObjectConstructor(ExecState* exec)
{
- return constructObject(exec, args);
+ return JSValue::encode(constructObject(exec));
}
-CallType ObjectConstructor::getCallData(CallData& callData)
+CallType ObjectConstructor::getCallData(JSCell*, CallData& callData)
{
callData.native.function = callObjectConstructor;
return CallTypeHost;
}
+EncodedJSValue JSC_HOST_CALL objectConstructorGetPrototypeOf(ExecState* exec)
+{
+ if (!exec->argument(0).isObject())
+ return throwVMError(exec, createTypeError(exec, ASCIILiteral("Requested prototype of a value that is not an object.")));
+ JSObject* object = asObject(exec->argument(0));
+ if (!object->allowsAccessFrom(exec->trueCallerFrame()))
+ return JSValue::encode(jsUndefined());
+ return JSValue::encode(object->prototype());
+}
+
+EncodedJSValue JSC_HOST_CALL objectConstructorGetOwnPropertyDescriptor(ExecState* exec)
+{
+ if (!exec->argument(0).isObject())
+ return throwVMError(exec, createTypeError(exec, ASCIILiteral("Requested property descriptor of a value that is not an object.")));
+ String propertyName = exec->argument(1).toString(exec)->value(exec);
+ if (exec->hadException())
+ return JSValue::encode(jsNull());
+ JSObject* object = asObject(exec->argument(0));
+ PropertyDescriptor descriptor;
+ if (!object->methodTable()->getOwnPropertyDescriptor(object, exec, Identifier(exec, propertyName), descriptor))
+ return JSValue::encode(jsUndefined());
+ if (exec->hadException())
+ return JSValue::encode(jsUndefined());
+
+ JSObject* description = constructEmptyObject(exec);
+ if (!descriptor.isAccessorDescriptor()) {
+ description->putDirect(exec->vm(), exec->propertyNames().value, descriptor.value() ? descriptor.value() : jsUndefined(), 0);
+ description->putDirect(exec->vm(), exec->propertyNames().writable, jsBoolean(descriptor.writable()), 0);
+ } else {
+ ASSERT(descriptor.getter());
+ ASSERT(descriptor.setter());
+ description->putDirect(exec->vm(), exec->propertyNames().get, descriptor.getter(), 0);
+ description->putDirect(exec->vm(), exec->propertyNames().set, descriptor.setter(), 0);
+ }
+
+ description->putDirect(exec->vm(), exec->propertyNames().enumerable, jsBoolean(descriptor.enumerable()), 0);
+ description->putDirect(exec->vm(), exec->propertyNames().configurable, jsBoolean(descriptor.configurable()), 0);
+
+ return JSValue::encode(description);
+}
+
+// FIXME: Use the enumeration cache.
+EncodedJSValue JSC_HOST_CALL objectConstructorGetOwnPropertyNames(ExecState* exec)
+{
+ if (!exec->argument(0).isObject())
+ return throwVMError(exec, createTypeError(exec, ASCIILiteral("Requested property names of a value that is not an object.")));
+ PropertyNameArray properties(exec);
+ asObject(exec->argument(0))->methodTable()->getOwnPropertyNames(asObject(exec->argument(0)), exec, properties, IncludeDontEnumProperties);
+ JSArray* names = constructEmptyArray(exec, 0);
+ size_t numProperties = properties.size();
+ for (size_t i = 0; i < numProperties; i++)
+ names->push(exec, jsOwnedString(exec, properties[i].string()));
+ return JSValue::encode(names);
+}
+
+// FIXME: Use the enumeration cache.
+EncodedJSValue JSC_HOST_CALL objectConstructorKeys(ExecState* exec)
+{
+ if (!exec->argument(0).isObject())
+ return throwVMError(exec, createTypeError(exec, ASCIILiteral("Requested keys of a value that is not an object.")));
+ PropertyNameArray properties(exec);
+ asObject(exec->argument(0))->methodTable()->getOwnPropertyNames(asObject(exec->argument(0)), exec, properties, ExcludeDontEnumProperties);
+ JSArray* keys = constructEmptyArray(exec, 0);
+ size_t numProperties = properties.size();
+ for (size_t i = 0; i < numProperties; i++)
+ keys->push(exec, jsOwnedString(exec, properties[i].string()));
+ return JSValue::encode(keys);
+}
+
+// ES5 8.10.5 ToPropertyDescriptor
+static bool toPropertyDescriptor(ExecState* exec, JSValue in, PropertyDescriptor& desc)
+{
+ if (!in.isObject()) {
+ throwError(exec, createTypeError(exec, ASCIILiteral("Property description must be an object.")));
+ return false;
+ }
+ JSObject* description = asObject(in);
+
+ PropertySlot enumerableSlot(description);
+ if (description->getPropertySlot(exec, exec->propertyNames().enumerable, enumerableSlot)) {
+ desc.setEnumerable(enumerableSlot.getValue(exec, exec->propertyNames().enumerable).toBoolean(exec));
+ if (exec->hadException())
+ return false;
+ }
+
+ PropertySlot configurableSlot(description);
+ if (description->getPropertySlot(exec, exec->propertyNames().configurable, configurableSlot)) {
+ desc.setConfigurable(configurableSlot.getValue(exec, exec->propertyNames().configurable).toBoolean(exec));
+ if (exec->hadException())
+ return false;
+ }
+
+ JSValue value;
+ PropertySlot valueSlot(description);
+ if (description->getPropertySlot(exec, exec->propertyNames().value, valueSlot)) {
+ desc.setValue(valueSlot.getValue(exec, exec->propertyNames().value));
+ if (exec->hadException())
+ return false;
+ }
+
+ PropertySlot writableSlot(description);
+ if (description->getPropertySlot(exec, exec->propertyNames().writable, writableSlot)) {
+ desc.setWritable(writableSlot.getValue(exec, exec->propertyNames().writable).toBoolean(exec));
+ if (exec->hadException())
+ return false;
+ }
+
+ PropertySlot getSlot(description);
+ if (description->getPropertySlot(exec, exec->propertyNames().get, getSlot)) {
+ JSValue get = getSlot.getValue(exec, exec->propertyNames().get);
+ if (exec->hadException())
+ return false;
+ if (!get.isUndefined()) {
+ CallData callData;
+ if (getCallData(get, callData) == CallTypeNone) {
+ throwError(exec, createTypeError(exec, ASCIILiteral("Getter must be a function.")));
+ return false;
+ }
+ }
+ desc.setGetter(get);
+ }
+
+ PropertySlot setSlot(description);
+ if (description->getPropertySlot(exec, exec->propertyNames().set, setSlot)) {
+ JSValue set = setSlot.getValue(exec, exec->propertyNames().set);
+ if (exec->hadException())
+ return false;
+ if (!set.isUndefined()) {
+ CallData callData;
+ if (getCallData(set, callData) == CallTypeNone) {
+ throwError(exec, createTypeError(exec, ASCIILiteral("Setter must be a function.")));
+ return false;
+ }
+ }
+ desc.setSetter(set);
+ }
+
+ if (!desc.isAccessorDescriptor())
+ return true;
+
+ if (desc.value()) {
+ throwError(exec, createTypeError(exec, ASCIILiteral("Invalid property. 'value' present on property with getter or setter.")));
+ return false;
+ }
+
+ if (desc.writablePresent()) {
+ throwError(exec, createTypeError(exec, ASCIILiteral("Invalid property. 'writable' present on property with getter or setter.")));
+ return false;
+ }
+ return true;
+}
+
+EncodedJSValue JSC_HOST_CALL objectConstructorDefineProperty(ExecState* exec)
+{
+ if (!exec->argument(0).isObject())
+ return throwVMError(exec, createTypeError(exec, ASCIILiteral("Properties can only be defined on Objects.")));
+ JSObject* O = asObject(exec->argument(0));
+ String propertyName = exec->argument(1).toString(exec)->value(exec);
+ if (exec->hadException())
+ return JSValue::encode(jsNull());
+ PropertyDescriptor descriptor;
+ if (!toPropertyDescriptor(exec, exec->argument(2), descriptor))
+ return JSValue::encode(jsNull());
+ ASSERT((descriptor.attributes() & Accessor) || (!descriptor.isAccessorDescriptor()));
+ ASSERT(!exec->hadException());
+ O->methodTable()->defineOwnProperty(O, exec, Identifier(exec, propertyName), descriptor, true);
+ return JSValue::encode(O);
+}
+
+static JSValue defineProperties(ExecState* exec, JSObject* object, JSObject* properties)
+{
+ PropertyNameArray propertyNames(exec);
+ asObject(properties)->methodTable()->getOwnPropertyNames(asObject(properties), exec, propertyNames, ExcludeDontEnumProperties);
+ size_t numProperties = propertyNames.size();
+ Vector<PropertyDescriptor> descriptors;
+ MarkedArgumentBuffer markBuffer;
+ for (size_t i = 0; i < numProperties; i++) {
+ PropertySlot slot;
+ JSValue prop = properties->get(exec, propertyNames[i]);
+ if (exec->hadException())
+ return jsNull();
+ PropertyDescriptor descriptor;
+ if (!toPropertyDescriptor(exec, prop, descriptor))
+ return jsNull();
+ descriptors.append(descriptor);
+ // Ensure we mark all the values that we're accumulating
+ if (descriptor.isDataDescriptor() && descriptor.value())
+ markBuffer.append(descriptor.value());
+ if (descriptor.isAccessorDescriptor()) {
+ if (descriptor.getter())
+ markBuffer.append(descriptor.getter());
+ if (descriptor.setter())
+ markBuffer.append(descriptor.setter());
+ }
+ }
+ for (size_t i = 0; i < numProperties; i++) {
+ object->methodTable()->defineOwnProperty(object, exec, propertyNames[i], descriptors[i], true);
+ if (exec->hadException())
+ return jsNull();
+ }
+ return object;
+}
+
+EncodedJSValue JSC_HOST_CALL objectConstructorDefineProperties(ExecState* exec)
+{
+ if (!exec->argument(0).isObject())
+ return throwVMError(exec, createTypeError(exec, ASCIILiteral("Properties can only be defined on Objects.")));
+ return JSValue::encode(defineProperties(exec, asObject(exec->argument(0)), exec->argument(1).toObject(exec)));
+}
+
+EncodedJSValue JSC_HOST_CALL objectConstructorCreate(ExecState* exec)
+{
+ if (!exec->argument(0).isObject() && !exec->argument(0).isNull())
+ return throwVMError(exec, createTypeError(exec, ASCIILiteral("Object prototype may only be an Object or null.")));
+ JSValue proto = exec->argument(0);
+ JSObject* newObject = proto.isObject()
+ ? constructEmptyObject(exec, asObject(proto))
+ : constructEmptyObject(exec, exec->lexicalGlobalObject()->nullPrototypeObjectStructure());
+ if (exec->argument(1).isUndefined())
+ return JSValue::encode(newObject);
+ if (!exec->argument(1).isObject())
+ return throwVMError(exec, createTypeError(exec, ASCIILiteral("Property descriptor list must be an Object.")));
+ return JSValue::encode(defineProperties(exec, newObject, asObject(exec->argument(1))));
+}
+
+EncodedJSValue JSC_HOST_CALL objectConstructorSeal(ExecState* exec)
+{
+ // 1. If Type(O) is not Object throw a TypeError exception.
+ JSValue obj = exec->argument(0);
+ if (!obj.isObject())
+ return throwVMError(exec, createTypeError(exec, ASCIILiteral("Object.seal can only be called on Objects.")));
+ JSObject* object = asObject(obj);
+
+ if (isJSFinalObject(object)) {
+ object->seal(exec->vm());
+ return JSValue::encode(obj);
+ }
+
+ // 2. For each named own property name P of O,
+ PropertyNameArray properties(exec);
+ object->methodTable()->getOwnPropertyNames(object, exec, properties, IncludeDontEnumProperties);
+ PropertyNameArray::const_iterator end = properties.end();
+ for (PropertyNameArray::const_iterator iter = properties.begin(); iter != end; ++iter) {
+ // a. Let desc be the result of calling the [[GetOwnProperty]] internal method of O with P.
+ PropertyDescriptor desc;
+ if (!object->methodTable()->getOwnPropertyDescriptor(object, exec, *iter, desc))
+ continue;
+ // b. If desc.[[Configurable]] is true, set desc.[[Configurable]] to false.
+ desc.setConfigurable(false);
+ // c. Call the [[DefineOwnProperty]] internal method of O with P, desc, and true as arguments.
+ object->methodTable()->defineOwnProperty(object, exec, *iter, desc, true);
+ if (exec->hadException())
+ return JSValue::encode(obj);
+ }
+
+ // 3. Set the [[Extensible]] internal property of O to false.
+ object->preventExtensions(exec->vm());
+
+ // 4. Return O.
+ return JSValue::encode(obj);
+}
+
+EncodedJSValue JSC_HOST_CALL objectConstructorFreeze(ExecState* exec)
+{
+ // 1. If Type(O) is not Object throw a TypeError exception.
+ JSValue obj = exec->argument(0);
+ if (!obj.isObject())
+ return throwVMError(exec, createTypeError(exec, ASCIILiteral("Object.freeze can only be called on Objects.")));
+ JSObject* object = asObject(obj);
+
+ if (isJSFinalObject(object) && !hasIndexedProperties(object->structure()->indexingType())) {
+ object->freeze(exec->vm());
+ return JSValue::encode(obj);
+ }
+
+ // 2. For each named own property name P of O,
+ PropertyNameArray properties(exec);
+ object->methodTable()->getOwnPropertyNames(object, exec, properties, IncludeDontEnumProperties);
+ PropertyNameArray::const_iterator end = properties.end();
+ for (PropertyNameArray::const_iterator iter = properties.begin(); iter != end; ++iter) {
+ // a. Let desc be the result of calling the [[GetOwnProperty]] internal method of O with P.
+ PropertyDescriptor desc;
+ if (!object->methodTable()->getOwnPropertyDescriptor(object, exec, *iter, desc))
+ continue;
+ // b. If IsDataDescriptor(desc) is true, then
+ // i. If desc.[[Writable]] is true, set desc.[[Writable]] to false.
+ if (desc.isDataDescriptor())
+ desc.setWritable(false);
+ // c. If desc.[[Configurable]] is true, set desc.[[Configurable]] to false.
+ desc.setConfigurable(false);
+ // d. Call the [[DefineOwnProperty]] internal method of O with P, desc, and true as arguments.
+ object->methodTable()->defineOwnProperty(object, exec, *iter, desc, true);
+ if (exec->hadException())
+ return JSValue::encode(obj);
+ }
+
+ // 3. Set the [[Extensible]] internal property of O to false.
+ object->preventExtensions(exec->vm());
+
+ // 4. Return O.
+ return JSValue::encode(obj);
+}
+
+EncodedJSValue JSC_HOST_CALL objectConstructorPreventExtensions(ExecState* exec)
+{
+ JSValue obj = exec->argument(0);
+ if (!obj.isObject())
+ return throwVMError(exec, createTypeError(exec, ASCIILiteral("Object.preventExtensions can only be called on Objects.")));
+ asObject(obj)->preventExtensions(exec->vm());
+ return JSValue::encode(obj);
+}
+
+EncodedJSValue JSC_HOST_CALL objectConstructorIsSealed(ExecState* exec)
+{
+ // 1. If Type(O) is not Object throw a TypeError exception.
+ JSValue obj = exec->argument(0);
+ if (!obj.isObject())
+ return throwVMError(exec, createTypeError(exec, ASCIILiteral("Object.isSealed can only be called on Objects.")));
+ JSObject* object = asObject(obj);
+
+ if (isJSFinalObject(object))
+ return JSValue::encode(jsBoolean(object->isSealed(exec->vm())));
+
+ // 2. For each named own property name P of O,
+ PropertyNameArray properties(exec);
+ object->methodTable()->getOwnPropertyNames(object, exec, properties, IncludeDontEnumProperties);
+ PropertyNameArray::const_iterator end = properties.end();
+ for (PropertyNameArray::const_iterator iter = properties.begin(); iter != end; ++iter) {
+ // a. Let desc be the result of calling the [[GetOwnProperty]] internal method of O with P.
+ PropertyDescriptor desc;
+ if (!object->methodTable()->getOwnPropertyDescriptor(object, exec, *iter, desc))
+ continue;
+ // b. If desc.[[Configurable]] is true, then return false.
+ if (desc.configurable())
+ return JSValue::encode(jsBoolean(false));
+ }
+
+ // 3. If the [[Extensible]] internal property of O is false, then return true.
+ // 4. Otherwise, return false.
+ return JSValue::encode(jsBoolean(!object->isExtensible()));
+}
+
+EncodedJSValue JSC_HOST_CALL objectConstructorIsFrozen(ExecState* exec)
+{
+ // 1. If Type(O) is not Object throw a TypeError exception.
+ JSValue obj = exec->argument(0);
+ if (!obj.isObject())
+ return throwVMError(exec, createTypeError(exec, ASCIILiteral("Object.isFrozen can only be called on Objects.")));
+ JSObject* object = asObject(obj);
+
+ if (isJSFinalObject(object))
+ return JSValue::encode(jsBoolean(object->isFrozen(exec->vm())));
+
+ // 2. For each named own property name P of O,
+ PropertyNameArray properties(exec);
+ object->methodTable()->getOwnPropertyNames(object, exec, properties, IncludeDontEnumProperties);
+ PropertyNameArray::const_iterator end = properties.end();
+ for (PropertyNameArray::const_iterator iter = properties.begin(); iter != end; ++iter) {
+ // a. Let desc be the result of calling the [[GetOwnProperty]] internal method of O with P.
+ PropertyDescriptor desc;
+ if (!object->methodTable()->getOwnPropertyDescriptor(object, exec, *iter, desc))
+ continue;
+ // b. If IsDataDescriptor(desc) is true then
+ // i. If desc.[[Writable]] is true, return false. c. If desc.[[Configurable]] is true, then return false.
+ if ((desc.isDataDescriptor() && desc.writable()) || desc.configurable())
+ return JSValue::encode(jsBoolean(false));
+ }
+
+ // 3. If the [[Extensible]] internal property of O is false, then return true.
+ // 4. Otherwise, return false.
+ return JSValue::encode(jsBoolean(!object->isExtensible()));
+}
+
+EncodedJSValue JSC_HOST_CALL objectConstructorIsExtensible(ExecState* exec)
+{
+ JSValue obj = exec->argument(0);
+ if (!obj.isObject())
+ return throwVMError(exec, createTypeError(exec, ASCIILiteral("Object.isExtensible can only be called on Objects.")));
+ return JSValue::encode(jsBoolean(asObject(obj)->isExtensible()));
+}
+
} // namespace JSC
projects / apple / javascriptcore.git / blobdiff