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LibJS: Add spec comments to ObjectConstructor

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Linus Groh 2023-04-14 17:05:27 +02:00
parent f0dd425492
commit 50cb4f08a1
1 changed files with 380 additions and 291 deletions
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671
Userland/Libraries/LibJS/Runtime/ObjectConstructor.cpp
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@ -70,13 +70,20 @@ ThrowCompletionOr<NonnullGCPtr<Object>> ObjectConstructor::construct(FunctionObj
{
auto& vm = this->vm();
auto& realm = *vm.current_realm();
if (&new_target != this)
return TRY(ordinary_create_from_constructor<Object>(vm, new_target, &Intrinsics::object_prototype, ConstructWithPrototypeTag::Tag));
auto value = vm.argument(0);
// 1. If NewTarget is neither undefined nor the active function object, then
if (&new_target != this) {
// a. Return ? OrdinaryCreateFromConstructor(NewTarget, "%Object.prototype%").
return TRY(ordinary_create_from_constructor<Object>(vm, new_target, &Intrinsics::object_prototype, ConstructWithPrototypeTag::Tag));
}
// 2. If value is either undefined or null, return OrdinaryObjectCreate(%Object.prototype%).
if (value.is_nullish())
return Object::create(realm, realm.intrinsics().object_prototype());
return TRY(value.to_object(vm));
// 3. Return ! ToObject(value).
return MUST(value.to_object(vm));
}
enum class GetOwnPropertyKeysType {
@ -109,293 +116,6 @@ static ThrowCompletionOr<MarkedVector<Value>> get_own_property_keys(VM& vm, Valu
return { move(name_list) };
}
// 20.1.2.10 Object.getOwnPropertyNames ( O ), https://tc39.es/ecma262/#sec-object.getownpropertynames
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::get_own_property_names)
{
auto& realm = *vm.current_realm();
// 1. Return CreateArrayFromList(? GetOwnPropertyKeys(O, string)).
return Array::create_from(realm, TRY(get_own_property_keys(vm, vm.argument(0), GetOwnPropertyKeysType::String)));
}
// 20.1.2.11 Object.getOwnPropertySymbols ( O ), https://tc39.es/ecma262/#sec-object.getownpropertysymbols
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::get_own_property_symbols)
{
auto& realm = *vm.current_realm();
// 1. Return CreateArrayFromList(? GetOwnPropertyKeys(O, symbol)).
return Array::create_from(realm, TRY(get_own_property_keys(vm, vm.argument(0), GetOwnPropertyKeysType::Symbol)));
}
// 20.1.2.12 Object.getPrototypeOf ( O ), https://tc39.es/ecma262/#sec-object.getprototypeof
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::get_prototype_of)
{
// 1. Let obj be ? ToObject(O).
auto object = TRY(vm.argument(0).to_object(vm));
// 2. Return ? obj.[[GetPrototypeOf]]().
return TRY(object->internal_get_prototype_of());
}
// 20.1.2.22 Object.setPrototypeOf ( O, proto ), https://tc39.es/ecma262/#sec-object.setprototypeof
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::set_prototype_of)
{
auto proto = vm.argument(1);
// 1. Set O to ? RequireObjectCoercible(O).
auto object = TRY(require_object_coercible(vm, vm.argument(0)));
// 2. If Type(proto) is neither Object nor Null, throw a TypeError exception.
if (!proto.is_object() && !proto.is_null())
return vm.throw_completion<TypeError>(ErrorType::ObjectPrototypeWrongType);
// 3. If Type(O) is not Object, return O.
if (!object.is_object())
return object;
// 4. Let status be ? O.[[SetPrototypeOf]](proto).
auto status = TRY(object.as_object().internal_set_prototype_of(proto.is_null() ? nullptr : &proto.as_object()));
// 5. If status is false, throw a TypeError exception.
if (!status) {
// FIXME: Improve/contextualize error message
return vm.throw_completion<TypeError>(ErrorType::ObjectSetPrototypeOfReturnedFalse);
}
// 6. Return O.
return object;
}
// 20.1.2.15 Object.isExtensible ( O ), https://tc39.es/ecma262/#sec-object.isextensible
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::is_extensible)
{
auto argument = vm.argument(0);
if (!argument.is_object())
return Value(false);
return Value(TRY(argument.as_object().is_extensible()));
}
// 20.1.2.16 Object.isFrozen ( O ), https://tc39.es/ecma262/#sec-object.isfrozen
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::is_frozen)
{
auto argument = vm.argument(0);
if (!argument.is_object())
return Value(true);
return Value(TRY(argument.as_object().test_integrity_level(Object::IntegrityLevel::Frozen)));
}
// 20.1.2.17 Object.isSealed ( O ), https://tc39.es/ecma262/#sec-object.issealed
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::is_sealed)
{
auto argument = vm.argument(0);
if (!argument.is_object())
return Value(true);
return Value(TRY(argument.as_object().test_integrity_level(Object::IntegrityLevel::Sealed)));
}
// 20.1.2.19 Object.preventExtensions ( O ), https://tc39.es/ecma262/#sec-object.preventextensions
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::prevent_extensions)
{
auto argument = vm.argument(0);
if (!argument.is_object())
return argument;
auto status = TRY(argument.as_object().internal_prevent_extensions());
if (!status) {
// FIXME: Improve/contextualize error message
return vm.throw_completion<TypeError>(ErrorType::ObjectPreventExtensionsReturnedFalse);
}
return argument;
}
// 20.1.2.6 Object.freeze ( O ), https://tc39.es/ecma262/#sec-object.freeze
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::freeze)
{
auto argument = vm.argument(0);
if (!argument.is_object())
return argument;
auto status = TRY(argument.as_object().set_integrity_level(Object::IntegrityLevel::Frozen));
if (!status)
return vm.throw_completion<TypeError>(ErrorType::ObjectFreezeFailed);
return argument;
}
// 20.1.2.7 Object.fromEntries ( iterable ), https://tc39.es/ecma262/#sec-object.fromentries
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::from_entries)
{
auto& realm = *vm.current_realm();
auto iterable = TRY(require_object_coercible(vm, vm.argument(0)));
auto object = Object::create(realm, realm.intrinsics().object_prototype());
(void)TRY(get_iterator_values(vm, iterable, [&](Value iterator_value) -> Optional<Completion> {
if (!iterator_value.is_object())
return vm.throw_completion<TypeError>(ErrorType::NotAnObject, DeprecatedString::formatted("Iterator value {}", TRY_OR_THROW_OOM(vm, iterator_value.to_string_without_side_effects())));
auto key = TRY(iterator_value.as_object().get(0));
auto value = TRY(iterator_value.as_object().get(1));
auto property_key = TRY(key.to_property_key(vm));
MUST(object->create_data_property_or_throw(property_key, value));
return {};
}));
return object;
}
// 20.1.2.21 Object.seal ( O ), https://tc39.es/ecma262/#sec-object.seal
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::seal)
{
auto argument = vm.argument(0);
if (!argument.is_object())
return argument;
auto status = TRY(argument.as_object().set_integrity_level(Object::IntegrityLevel::Sealed));
if (!status)
return vm.throw_completion<TypeError>(ErrorType::ObjectSealFailed);
return argument;
}
// 20.1.2.8 Object.getOwnPropertyDescriptor ( O, P ), https://tc39.es/ecma262/#sec-object.getownpropertydescriptor
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::get_own_property_descriptor)
{
auto object = TRY(vm.argument(0).to_object(vm));
auto key = TRY(vm.argument(1).to_property_key(vm));
auto descriptor = TRY(object->internal_get_own_property(key));
return from_property_descriptor(vm, descriptor);
}
// 20.1.2.9 Object.getOwnPropertyDescriptors ( O ), https://tc39.es/ecma262/#sec-object.getownpropertydescriptors
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::get_own_property_descriptors)
{
auto& realm = *vm.current_realm();
// 1. Let obj be ? ToObject(O).
auto object = TRY(vm.argument(0).to_object(vm));
// 2. Let ownKeys be ? obj.[[OwnPropertyKeys]]().
auto own_keys = TRY(object->internal_own_property_keys());
// 3. Let descriptors be OrdinaryObjectCreate(%Object.prototype%).
auto descriptors = Object::create(realm, realm.intrinsics().object_prototype());
// 4. For each element key of ownKeys, do
for (auto& key : own_keys) {
auto property_key = MUST(PropertyKey::from_value(vm, key));
// a. Let desc be ? obj.[[GetOwnProperty]](key).
auto desc = TRY(object->internal_get_own_property(property_key));
// b. Let descriptor be FromPropertyDescriptor(desc).
auto descriptor = from_property_descriptor(vm, desc);
// c. If descriptor is not undefined, perform ! CreateDataPropertyOrThrow(descriptors, key, descriptor).
if (!descriptor.is_undefined())
MUST(descriptors->create_data_property_or_throw(property_key, descriptor));
}
// 5. Return descriptors.
return descriptors;
}
// 20.1.2.4 Object.defineProperty ( O, P, Attributes ), https://tc39.es/ecma262/#sec-object.defineproperty
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::define_property)
{
if (!vm.argument(0).is_object())
return vm.throw_completion<TypeError>(ErrorType::NotAnObject, TRY_OR_THROW_OOM(vm, vm.argument(0).to_string_without_side_effects()));
auto key = TRY(vm.argument(1).to_property_key(vm));
auto descriptor = TRY(to_property_descriptor(vm, vm.argument(2)));
TRY(vm.argument(0).as_object().define_property_or_throw(key, descriptor));
return vm.argument(0);
}
// 20.1.2.3 Object.defineProperties ( O, Properties ), https://tc39.es/ecma262/#sec-object.defineproperties
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::define_properties)
{
auto object = vm.argument(0);
auto properties = vm.argument(1);
// 1. If Type(O) is not Object, throw a TypeError exception.
if (!object.is_object())
return vm.throw_completion<TypeError>(ErrorType::NotAnObject, "Object argument");
// 2. Return ? ObjectDefineProperties(O, Properties).
return TRY(object.as_object().define_properties(properties));
}
// 20.1.2.14 Object.is ( value1, value2 ), https://tc39.es/ecma262/#sec-object.is
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::is)
{
return Value(same_value(vm.argument(0), vm.argument(1)));
}
// 20.1.2.18 Object.keys ( O ), https://tc39.es/ecma262/#sec-object.keys
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::keys)
{
auto& realm = *vm.current_realm();
auto object = TRY(vm.argument(0).to_object(vm));
auto name_list = TRY(object->enumerable_own_property_names(PropertyKind::Key));
return Array::create_from(realm, name_list);
}
// 20.1.2.23 Object.values ( O ), https://tc39.es/ecma262/#sec-object.values
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::values)
{
auto& realm = *vm.current_realm();
auto object = TRY(vm.argument(0).to_object(vm));
auto name_list = TRY(object->enumerable_own_property_names(PropertyKind::Value));
return Array::create_from(realm, name_list);
}
// 20.1.2.5 Object.entries ( O ), https://tc39.es/ecma262/#sec-object.entries
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::entries)
{
auto& realm = *vm.current_realm();
auto object = TRY(vm.argument(0).to_object(vm));
auto name_list = TRY(object->enumerable_own_property_names(PropertyKind::KeyAndValue));
return Array::create_from(realm, name_list);
}
// 20.1.2.2 Object.create ( O, Properties ), https://tc39.es/ecma262/#sec-object.create
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::create)
{
auto& realm = *vm.current_realm();
auto proto = vm.argument(0);
auto properties = vm.argument(1);
// 1. If Type(O) is neither Object nor Null, throw a TypeError exception.
if (!proto.is_object() && !proto.is_null())
return vm.throw_completion<TypeError>(ErrorType::ObjectPrototypeWrongType);
// 2. Let obj be OrdinaryObjectCreate(O).
auto object = Object::create(realm, proto.is_null() ? nullptr : &proto.as_object());
// 3. If Properties is not undefined, then
if (!properties.is_undefined()) {
// a. Return ? ObjectDefineProperties(obj, Properties).
return TRY(object->define_properties(properties));
}
// 4. Return obj.
return object;
}
// 20.1.2.13 Object.hasOwn ( O, P ), https://tc39.es/ecma262/#sec-object.hasown
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::has_own)
{
// 1. Let obj be ? ToObject(O).
auto object = TRY(vm.argument(0).to_object(vm));
// 2. Let key be ? ToPropertyKey(P).
auto key = TRY(vm.argument(1).to_property_key(vm));
// 3. Return ? HasOwnProperty(obj, key).
return Value(TRY(object->has_own_property(key)));
}
// 20.1.2.1 Object.assign ( target, ...sources ), https://tc39.es/ecma262/#sec-object.assign
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::assign)
{
@ -443,4 +163,373 @@ JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::assign)
return to;
}
// 20.1.2.2 Object.create ( O, Properties ), https://tc39.es/ecma262/#sec-object.create
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::create)
{
auto& realm = *vm.current_realm();
auto proto = vm.argument(0);
auto properties = vm.argument(1);
// 1. If Type(O) is neither Object nor Null, throw a TypeError exception.
if (!proto.is_object() && !proto.is_null())
return vm.throw_completion<TypeError>(ErrorType::ObjectPrototypeWrongType);
// 2. Let obj be OrdinaryObjectCreate(O).
auto object = Object::create(realm, proto.is_null() ? nullptr : &proto.as_object());
// 3. If Properties is not undefined, then
if (!properties.is_undefined()) {
// a. Return ? ObjectDefineProperties(obj, Properties).
return TRY(object->define_properties(properties));
}
// 4. Return obj.
return object;
}
// 20.1.2.3 Object.defineProperties ( O, Properties ), https://tc39.es/ecma262/#sec-object.defineproperties
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::define_properties)
{
auto object = vm.argument(0);
auto properties = vm.argument(1);
// 1. If Type(O) is not Object, throw a TypeError exception.
if (!object.is_object())
return vm.throw_completion<TypeError>(ErrorType::NotAnObject, "Object argument");
// 2. Return ? ObjectDefineProperties(O, Properties).
return TRY(object.as_object().define_properties(properties));
}
// 20.1.2.4 Object.defineProperty ( O, P, Attributes ), https://tc39.es/ecma262/#sec-object.defineproperty
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::define_property)
{
// 1. If O is not an Object, throw a TypeError exception.
if (!vm.argument(0).is_object())
return vm.throw_completion<TypeError>(ErrorType::NotAnObject, TRY_OR_THROW_OOM(vm, vm.argument(0).to_string_without_side_effects()));
auto object = MUST(vm.argument(0).to_object(vm));
// 2. Let key be ? ToPropertyKey(P).
auto key = TRY(vm.argument(1).to_property_key(vm));
// 3. Let desc be ? ToPropertyDescriptor(Attributes).
auto descriptor = TRY(to_property_descriptor(vm, vm.argument(2)));
// 4. Perform ? DefinePropertyOrThrow(O, key, desc).
TRY(object->define_property_or_throw(key, descriptor));
// 5. Return O.
return object;
}
// 20.1.2.5 Object.entries ( O ), https://tc39.es/ecma262/#sec-object.entries
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::entries)
{
auto& realm = *vm.current_realm();
// 1. Let obj be ? ToObject(O).
auto object = TRY(vm.argument(0).to_object(vm));
// 2. Let entryList be ? EnumerableOwnProperties(obj, key+value).
auto name_list = TRY(object->enumerable_own_property_names(PropertyKind::KeyAndValue));
// 3. Return CreateArrayFromList(entryList).
return Array::create_from(realm, name_list);
}
// 20.1.2.6 Object.freeze ( O ), https://tc39.es/ecma262/#sec-object.freeze
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::freeze)
{
auto argument = vm.argument(0);
// 1. If O is not an Object, return O.
if (!argument.is_object())
return argument;
// 2. Let status be ? SetIntegrityLevel(O, frozen).
auto status = TRY(argument.as_object().set_integrity_level(Object::IntegrityLevel::Frozen));
// 3. If status is false, throw a TypeError exception.
if (!status)
return vm.throw_completion<TypeError>(ErrorType::ObjectFreezeFailed);
// 4. Return O.
return argument;
}
// 20.1.2.7 Object.fromEntries ( iterable ), https://tc39.es/ecma262/#sec-object.fromentries
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::from_entries)
{
auto& realm = *vm.current_realm();
// 1. Perform ? RequireObjectCoercible(iterable).
auto iterable = TRY(require_object_coercible(vm, vm.argument(0)));
// 2. Let obj be OrdinaryObjectCreate(%Object.prototype%).
auto object = Object::create(realm, realm.intrinsics().object_prototype());
// 3. Assert: obj is an extensible ordinary object with no own properties.
// 4. Let closure be a new Abstract Closure with parameters (key, value) that captures obj and performs the following steps when called:
// 5. Let adder be CreateBuiltinFunction(closure, 2, "", « »).
// 6. Return ? AddEntriesFromIterable(obj, iterable, adder).
(void)TRY(get_iterator_values(vm, iterable, [&](Value iterator_value) -> Optional<Completion> {
if (!iterator_value.is_object())
return vm.throw_completion<TypeError>(ErrorType::NotAnObject, DeprecatedString::formatted("Iterator value {}", TRY_OR_THROW_OOM(vm, iterator_value.to_string_without_side_effects())));
auto key = TRY(iterator_value.as_object().get(0));
auto value = TRY(iterator_value.as_object().get(1));
// a. Let propertyKey be ? ToPropertyKey(key).
auto property_key = TRY(key.to_property_key(vm));
// b. Perform ! CreateDataPropertyOrThrow(obj, propertyKey, value).
MUST(object->create_data_property_or_throw(property_key, value));
// c. Return undefined.
return {};
}));
return object;
}
// 20.1.2.8 Object.getOwnPropertyDescriptor ( O, P ), https://tc39.es/ecma262/#sec-object.getownpropertydescriptor
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::get_own_property_descriptor)
{
// 1. Let obj be ? ToObject(O).
auto object = TRY(vm.argument(0).to_object(vm));
// 2. Let key be ? ToPropertyKey(P).
auto key = TRY(vm.argument(1).to_property_key(vm));
// 3. Let desc be ? obj.[[GetOwnProperty]](key).
auto descriptor = TRY(object->internal_get_own_property(key));
// 4. Return FromPropertyDescriptor(desc).
return from_property_descriptor(vm, descriptor);
}
// 20.1.2.9 Object.getOwnPropertyDescriptors ( O ), https://tc39.es/ecma262/#sec-object.getownpropertydescriptors
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::get_own_property_descriptors)
{
auto& realm = *vm.current_realm();
// 1. Let obj be ? ToObject(O).
auto object = TRY(vm.argument(0).to_object(vm));
// 2. Let ownKeys be ? obj.[[OwnPropertyKeys]]().
auto own_keys = TRY(object->internal_own_property_keys());
// 3. Let descriptors be OrdinaryObjectCreate(%Object.prototype%).
auto descriptors = Object::create(realm, realm.intrinsics().object_prototype());
// 4. For each element key of ownKeys, do
for (auto& key : own_keys) {
auto property_key = MUST(PropertyKey::from_value(vm, key));
// a. Let desc be ? obj.[[GetOwnProperty]](key).
auto desc = TRY(object->internal_get_own_property(property_key));
// b. Let descriptor be FromPropertyDescriptor(desc).
auto descriptor = from_property_descriptor(vm, desc);
// c. If descriptor is not undefined, perform ! CreateDataPropertyOrThrow(descriptors, key, descriptor).
if (!descriptor.is_undefined())
MUST(descriptors->create_data_property_or_throw(property_key, descriptor));
}
// 5. Return descriptors.
return descriptors;
}
// 20.1.2.10 Object.getOwnPropertyNames ( O ), https://tc39.es/ecma262/#sec-object.getownpropertynames
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::get_own_property_names)
{
auto& realm = *vm.current_realm();
// 1. Return CreateArrayFromList(? GetOwnPropertyKeys(O, string)).
return Array::create_from(realm, TRY(get_own_property_keys(vm, vm.argument(0), GetOwnPropertyKeysType::String)));
}
// 20.1.2.11 Object.getOwnPropertySymbols ( O ), https://tc39.es/ecma262/#sec-object.getownpropertysymbols
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::get_own_property_symbols)
{
auto& realm = *vm.current_realm();
// 1. Return CreateArrayFromList(? GetOwnPropertyKeys(O, symbol)).
return Array::create_from(realm, TRY(get_own_property_keys(vm, vm.argument(0), GetOwnPropertyKeysType::Symbol)));
}
// 20.1.2.12 Object.getPrototypeOf ( O ), https://tc39.es/ecma262/#sec-object.getprototypeof
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::get_prototype_of)
{
// 1. Let obj be ? ToObject(O).
auto object = TRY(vm.argument(0).to_object(vm));
// 2. Return ? obj.[[GetPrototypeOf]]().
return TRY(object->internal_get_prototype_of());
}
// 20.1.2.13 Object.hasOwn ( O, P ), https://tc39.es/ecma262/#sec-object.hasown
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::has_own)
{
// 1. Let obj be ? ToObject(O).
auto object = TRY(vm.argument(0).to_object(vm));
// 2. Let key be ? ToPropertyKey(P).
auto key = TRY(vm.argument(1).to_property_key(vm));
// 3. Return ? HasOwnProperty(obj, key).
return Value(TRY(object->has_own_property(key)));
}
// 20.1.2.14 Object.is ( value1, value2 ), https://tc39.es/ecma262/#sec-object.is
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::is)
{
// 1. Return SameValue(value1, value2).
return Value(same_value(vm.argument(0), vm.argument(1)));
}
// 20.1.2.15 Object.isExtensible ( O ), https://tc39.es/ecma262/#sec-object.isextensible
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::is_extensible)
{
auto argument = vm.argument(0);
// 1. If O is not an Object, return false.
if (!argument.is_object())
return Value(false);
// 2. Return ? IsExtensible(O).
return Value(TRY(argument.as_object().is_extensible()));
}
// 20.1.2.16 Object.isFrozen ( O ), https://tc39.es/ecma262/#sec-object.isfrozen
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::is_frozen)
{
auto argument = vm.argument(0);
// 1. If O is not an Object, return true.
if (!argument.is_object())
return Value(true);
// 2. Return ? TestIntegrityLevel(O, frozen).
return Value(TRY(argument.as_object().test_integrity_level(Object::IntegrityLevel::Frozen)));
}
// 20.1.2.17 Object.isSealed ( O ), https://tc39.es/ecma262/#sec-object.issealed
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::is_sealed)
{
auto argument = vm.argument(0);
// 1. If O is not an Object, return true.
if (!argument.is_object())
return Value(true);
// 2. Return ? TestIntegrityLevel(O, sealed).
return Value(TRY(argument.as_object().test_integrity_level(Object::IntegrityLevel::Sealed)));
}
// 20.1.2.18 Object.keys ( O ), https://tc39.es/ecma262/#sec-object.keys
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::keys)
{
auto& realm = *vm.current_realm();
// 1. Let obj be ? ToObject(O).
auto object = TRY(vm.argument(0).to_object(vm));
// 2. Let keyList be ? EnumerableOwnProperties(obj, key).
auto name_list = TRY(object->enumerable_own_property_names(PropertyKind::Key));
// 3. Return CreateArrayFromList(keyList).
return Array::create_from(realm, name_list);
}
// 20.1.2.19 Object.preventExtensions ( O ), https://tc39.es/ecma262/#sec-object.preventextensions
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::prevent_extensions)
{
auto argument = vm.argument(0);
// 1. If O is not an Object, return O.
if (!argument.is_object())
return argument;
// 2. Let status be ? O.[[PreventExtensions]]().
auto status = TRY(argument.as_object().internal_prevent_extensions());
// 3. If status is false, throw a TypeError exception.
if (!status) {
// FIXME: Improve/contextualize error message
return vm.throw_completion<TypeError>(ErrorType::ObjectPreventExtensionsReturnedFalse);
}
// 4. Return O.
return argument;
}
// 20.1.2.21 Object.seal ( O ), https://tc39.es/ecma262/#sec-object.seal
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::seal)
{
auto argument = vm.argument(0);
// 1. If O is not an Object, return O.
if (!argument.is_object())
return argument;
// 2. Let status be ? SetIntegrityLevel(O, sealed).
auto status = TRY(argument.as_object().set_integrity_level(Object::IntegrityLevel::Sealed));
// 3. If status is false, throw a TypeError exception.
if (!status)
return vm.throw_completion<TypeError>(ErrorType::ObjectSealFailed);
// 4. Return O.
return argument;
}
// 20.1.2.22 Object.setPrototypeOf ( O, proto ), https://tc39.es/ecma262/#sec-object.setprototypeof
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::set_prototype_of)
{
auto proto = vm.argument(1);
// 1. Set O to ? RequireObjectCoercible(O).
auto object = TRY(require_object_coercible(vm, vm.argument(0)));
// 2. If Type(proto) is neither Object nor Null, throw a TypeError exception.
if (!proto.is_object() && !proto.is_null())
return vm.throw_completion<TypeError>(ErrorType::ObjectPrototypeWrongType);
// 3. If Type(O) is not Object, return O.
if (!object.is_object())
return object;
// 4. Let status be ? O.[[SetPrototypeOf]](proto).
auto status = TRY(object.as_object().internal_set_prototype_of(proto.is_null() ? nullptr : &proto.as_object()));
// 5. If status is false, throw a TypeError exception.
if (!status) {
// FIXME: Improve/contextualize error message
return vm.throw_completion<TypeError>(ErrorType::ObjectSetPrototypeOfReturnedFalse);
}
// 6. Return O.
return object;
}
// 20.1.2.23 Object.values ( O ), https://tc39.es/ecma262/#sec-object.values
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::values)
{
auto& realm = *vm.current_realm();
// 1. Let obj be ? ToObject(O).
auto object = TRY(vm.argument(0).to_object(vm));
// 2. Let valueList be ? EnumerableOwnProperties(obj, value).
auto name_list = TRY(object->enumerable_own_property_names(PropertyKind::Value));
// 3. Return CreateArrayFromList(valueList).
return Array::create_from(realm, name_list);
}
}