ee4fc97038
In the spec, object environments have a [[BindingObject]], so let's call it the same thing in our implementation.
116 lines
4.2 KiB
C++
116 lines
4.2 KiB
C++
/*
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* Copyright (c) 2020-2021, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibJS/AST.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/ObjectEnvironmentRecord.h>
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namespace JS {
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ObjectEnvironmentRecord::ObjectEnvironmentRecord(Object& binding_object, IsWithEnvironment is_with_environment, EnvironmentRecord* outer_environment)
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: EnvironmentRecord(outer_environment)
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, m_binding_object(binding_object)
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, m_with_environment(is_with_environment == IsWithEnvironment::Yes)
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{
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}
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void ObjectEnvironmentRecord::visit_edges(Cell::Visitor& visitor)
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{
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Base::visit_edges(visitor);
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visitor.visit(&m_binding_object);
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}
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Optional<Variable> ObjectEnvironmentRecord::get_from_environment_record(FlyString const& name) const
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{
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auto value = m_binding_object.get(name);
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if (value.is_empty())
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return {};
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return Variable { value, DeclarationKind::Var };
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}
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void ObjectEnvironmentRecord::put_into_environment_record(FlyString const& name, Variable variable)
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{
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m_binding_object.put(name, variable.value);
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}
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bool ObjectEnvironmentRecord::delete_from_environment_record(FlyString const& name)
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{
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return m_binding_object.delete_property(name);
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}
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// 9.1.1.2.1 HasBinding ( N ), https://tc39.es/ecma262/#sec-object-environment-records-hasbinding-n
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bool ObjectEnvironmentRecord::has_binding(FlyString const& name) const
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{
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bool found_binding = m_binding_object.has_property(name);
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if (!found_binding)
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return false;
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// FIXME: Implement the rest of this operation.
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return true;
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}
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// 9.1.1.2.2 CreateMutableBinding ( N, D ), https://tc39.es/ecma262/#sec-object-environment-records-createmutablebinding-n-d
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void ObjectEnvironmentRecord::create_mutable_binding(GlobalObject&, FlyString const& name, bool can_be_deleted)
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{
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PropertyAttributes attributes;
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attributes.set_enumerable();
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attributes.set_has_enumerable();
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attributes.set_writable();
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attributes.set_has_writable();
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attributes.set_has_configurable();
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if (can_be_deleted)
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attributes.set_configurable();
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m_binding_object.define_property(name, js_undefined(), attributes, true);
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}
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// 9.1.1.2.3 CreateImmutableBinding ( N, S ), https://tc39.es/ecma262/#sec-object-environment-records-createimmutablebinding-n-s
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void ObjectEnvironmentRecord::create_immutable_binding(GlobalObject&, FlyString const&, bool)
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{
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// "The CreateImmutableBinding concrete method of an object Environment Record is never used within this specification."
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VERIFY_NOT_REACHED();
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}
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// 9.1.1.2.4 InitializeBinding ( N, V ), https://tc39.es/ecma262/#sec-object-environment-records-initializebinding-n-v
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void ObjectEnvironmentRecord::initialize_binding(GlobalObject& global_object, FlyString const& name, Value value)
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{
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set_mutable_binding(global_object, name, value, false);
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}
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// 9.1.1.2.5 SetMutableBinding ( N, V, S ), https://tc39.es/ecma262/#sec-object-environment-records-setmutablebinding-n-v-s
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void ObjectEnvironmentRecord::set_mutable_binding(GlobalObject& global_object, FlyString const& name, Value value, bool strict)
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{
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bool still_exists = m_binding_object.has_property(name);
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if (!still_exists && strict) {
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global_object.vm().throw_exception<ReferenceError>(global_object, ErrorType::UnknownIdentifier, name);
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return;
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}
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// FIXME: This should use the Set abstract operation.
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// FIXME: Set returns a bool, so this may need to return a bool as well.
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m_binding_object.put(name, value);
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}
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// 9.1.1.2.6 GetBindingValue ( N, S ), https://tc39.es/ecma262/#sec-object-environment-records-getbindingvalue-n-s
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Value ObjectEnvironmentRecord::get_binding_value(GlobalObject& global_object, FlyString const& name, bool strict)
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{
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if (!m_binding_object.has_property(name)) {
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if (!strict)
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return js_undefined();
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global_object.vm().throw_exception<ReferenceError>(global_object, ErrorType::UnknownIdentifier, name);
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return {};
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}
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// FIXME: This should use the Get abstract operation.
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return m_binding_object.get(name);
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}
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// 9.1.1.2.7 DeleteBinding ( N ), https://tc39.es/ecma262/#sec-object-environment-records-deletebinding-n
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bool ObjectEnvironmentRecord::delete_binding(GlobalObject&, FlyString const& name)
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{
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return m_binding_object.delete_property(name);
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}
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}
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