b7e5f08e56
To no one's surprise, this patch is pretty big - this is possibly the most used AO of all of them. Definitely worth it though.
83 lines
2.9 KiB
C++
83 lines
2.9 KiB
C++
/*
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* Copyright (c) 2021, Idan Horowitz <idan.horowitz@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/Runtime/AbstractOperations.h>
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#include <LibJS/Runtime/Error.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/IteratorOperations.h>
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#include <LibJS/Runtime/WeakMap.h>
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#include <LibJS/Runtime/WeakMapConstructor.h>
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namespace JS {
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WeakMapConstructor::WeakMapConstructor(GlobalObject& global_object)
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: NativeFunction(vm().names.WeakMap.as_string(), *global_object.function_prototype())
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{
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}
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void WeakMapConstructor::initialize(GlobalObject& global_object)
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{
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auto& vm = this->vm();
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NativeFunction::initialize(global_object);
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// 24.3.2.1 WeakMap.prototype, https://tc39.es/ecma262/#sec-weakmap.prototype
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define_direct_property(vm.names.prototype, global_object.weak_map_prototype(), 0);
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define_direct_property(vm.names.length, Value(0), Attribute::Configurable);
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}
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WeakMapConstructor::~WeakMapConstructor()
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{
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}
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// 24.3.1.1 WeakMap ( [ iterable ] ), https://tc39.es/ecma262/#sec-weakmap-iterable
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Value WeakMapConstructor::call()
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{
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auto& vm = this->vm();
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vm.throw_exception<TypeError>(global_object(), ErrorType::ConstructorWithoutNew, vm.names.WeakMap);
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return {};
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}
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// 24.3.1.1 WeakMap ( [ iterable ] ), https://tc39.es/ecma262/#sec-weakmap-iterable
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Value WeakMapConstructor::construct(FunctionObject& new_target)
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{
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auto& vm = this->vm();
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auto& global_object = this->global_object();
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auto* weak_map = TRY_OR_DISCARD(ordinary_create_from_constructor<WeakMap>(global_object, new_target, &GlobalObject::weak_map_prototype));
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if (vm.argument(0).is_nullish())
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return weak_map;
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auto adder = TRY_OR_DISCARD(weak_map->get(vm.names.set));
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if (!adder.is_function()) {
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vm.throw_exception<TypeError>(global_object, ErrorType::NotAFunction, "'set' property of WeakMap");
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return {};
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}
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get_iterator_values(global_object, vm.argument(0), [&](Value iterator_value) {
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if (vm.exception())
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return IterationDecision::Break;
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if (!iterator_value.is_object()) {
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vm.throw_exception<TypeError>(global_object, ErrorType::NotAnObject, String::formatted("Iterator value {}", iterator_value.to_string_without_side_effects()));
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return IterationDecision::Break;
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}
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auto key_or_error = iterator_value.as_object().get(0);
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if (key_or_error.is_error())
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return IterationDecision::Break;
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auto key = key_or_error.release_value();
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auto value_or_error = iterator_value.as_object().get(1);
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if (value_or_error.is_error())
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return IterationDecision::Break;
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auto value = value_or_error.release_value();
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auto result = vm.call(adder.as_function(), Value(weak_map), key, value);
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return result.is_error() ? IterationDecision::Break : IterationDecision::Continue;
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});
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if (vm.exception())
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return {};
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return weak_map;
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}
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}
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