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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(GlobalObject& global_object)
: NativeFunction(vm().names.WeakMap.as_string(), *global_object.function_prototype())
{
}
void WeakMapConstructor::initialize(GlobalObject& global_object)
{
auto& vm = this->vm();
NativeFunction::initialize(global_object);
// 24.3.2.1 WeakMap.prototype, https://tc39.es/ecma262/#sec-weakmap.prototype
define_direct_property(vm.names.prototype, global_object.weak_map_prototype(), 0);
define_direct_property(vm.names.length, Value(0), Attribute::Configurable);
}
WeakMapConstructor::~WeakMapConstructor()
{
}
// 24.3.1.1 WeakMap ( [ iterable ] ), https://tc39.es/ecma262/#sec-weakmap-iterable
Value WeakMapConstructor::call()
{
auto& vm = this->vm();
vm.throw_exception<TypeError>(global_object(), ErrorType::ConstructorWithoutNew, vm.names.WeakMap);
return {};
}
// 24.3.1.1 WeakMap ( [ iterable ] ), https://tc39.es/ecma262/#sec-weakmap-iterable
Value WeakMapConstructor::construct(FunctionObject& new_target)
{
auto& vm = this->vm();
auto& global_object = this->global_object();
auto* weak_map = TRY_OR_DISCARD(ordinary_create_from_constructor<WeakMap>(global_object, new_target, &GlobalObject::weak_map_prototype));
if (vm.argument(0).is_nullish())
return weak_map;
auto adder = TRY_OR_DISCARD(weak_map->get(vm.names.set));
if (!adder.is_function()) {
vm.throw_exception<TypeError>(global_object, ErrorType::NotAFunction, "'set' property of WeakMap");
return {};
}
get_iterator_values(global_object, vm.argument(0), [&](Value iterator_value) {
if (vm.exception())
return IterationDecision::Break;
if (!iterator_value.is_object()) {
vm.throw_exception<TypeError>(global_object, ErrorType::NotAnObject, String::formatted("Iterator value {}", iterator_value.to_string_without_side_effects()));
return IterationDecision::Break;
}
auto key_or_error = iterator_value.as_object().get(0);
if (key_or_error.is_error())
return IterationDecision::Break;
auto key = key_or_error.release_value();
auto value_or_error = iterator_value.as_object().get(1);
if (value_or_error.is_error())
return IterationDecision::Break;
auto value = value_or_error.release_value();
auto result = vm.call(adder.as_function(), Value(weak_map), key, value);
return result.is_error() ? IterationDecision::Break : IterationDecision::Continue;
});
if (vm.exception())
return {};
return weak_map;
}
}
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