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/*
* Copyright (c) 2021, Idan Horowitz <idan.horowitz@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibJS/Runtime/AbstractOperations.h>
#include <LibJS/Runtime/Error.h>
#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/IteratorOperations.h>
#include <LibJS/Runtime/WeakMap.h>
#include <LibJS/Runtime/WeakMapConstructor.h>
namespace JS {
WeakMapConstructor::WeakMapConstructor(Realm& realm)
: NativeFunction(realm.vm().names.WeakMap.as_string(), *realm.intrinsics().function_prototype())
{
}
ThrowCompletionOr<void> WeakMapConstructor::initialize(Realm& realm)
{
auto& vm = this->vm();
MUST_OR_THROW_OOM(NativeFunction::initialize(realm));
// 24.3.2.1 WeakMap.prototype, https://tc39.es/ecma262/#sec-weakmap.prototype
define_direct_property(vm.names.prototype, realm.intrinsics().weak_map_prototype(), 0);
define_direct_property(vm.names.length, Value(0), Attribute::Configurable);
return {};
}
// 24.3.1.1 WeakMap ( [ iterable ] ), https://tc39.es/ecma262/#sec-weakmap-iterable
ThrowCompletionOr<Value> WeakMapConstructor::call()
{
auto& vm = this->vm();
return vm.throw_completion<TypeError>(ErrorType::ConstructorWithoutNew, vm.names.WeakMap);
}
// 24.3.1.1 WeakMap ( [ iterable ] ), https://tc39.es/ecma262/#sec-weakmap-iterable
ThrowCompletionOr<NonnullGCPtr<Object>> WeakMapConstructor::construct(FunctionObject& new_target)
{
auto& vm = this->vm();
auto weak_map = TRY(ordinary_create_from_constructor<WeakMap>(vm, new_target, &Intrinsics::weak_map_prototype));
if (vm.argument(0).is_nullish())
return weak_map;
auto adder = TRY(weak_map->get(vm.names.set));
if (!adder.is_function())
return vm.throw_completion<TypeError>(ErrorType::NotAFunction, "'set' property of WeakMap");
(void)TRY(get_iterator_values(vm, vm.argument(0), [&](Value iterator_value) -> Optional<Completion> {
if (!iterator_value.is_object())
return vm.throw_completion<TypeError>(ErrorType::NotAnObject, DeprecatedString::formatted("Iterator value {}", iterator_value.to_deprecated_string_without_side_effects()));
auto key = TRY(iterator_value.as_object().get(0));
auto value = TRY(iterator_value.as_object().get(1));
TRY(JS::call(vm, adder.as_function(), weak_map, key, value));
return {};
}));
return weak_map;
}
}
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