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