b6bef6b688
Produce JS-visible string results as UTF-16 at their source, including numeric formatting, BigInt and BigFraction formatting, URI encoding, console formatting, parser errors, regular expression errors, Intl and Temporal records, LibUnicode locale boundaries, and LibWeb bindings. Handle fractional radix formatting through the UTF-16 builder view.
79 lines
2.7 KiB
C++
79 lines
2.7 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/Iterator.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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GC_DEFINE_ALLOCATOR(WeakMapConstructor);
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WeakMapConstructor::WeakMapConstructor(Realm& realm)
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: NativeFunction(realm.vm().names.WeakMap.as_string(), realm.intrinsics().function_prototype())
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{
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}
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void WeakMapConstructor::initialize(Realm& realm)
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{
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auto& vm = this->vm();
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Base::initialize(realm);
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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, realm.intrinsics().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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// 24.3.1.1 WeakMap ( [ iterable ] ), https://tc39.es/ecma262/#sec-weakmap-iterable
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ThrowCompletionOr<Value> WeakMapConstructor::call()
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{
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auto& vm = this->vm();
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// 1. If NewTarget is undefined, throw a TypeError exception.
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return vm.throw_completion<TypeError>(ErrorType::ConstructorWithoutNew, vm.names.WeakMap);
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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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ThrowCompletionOr<GC::Ref<Object>> WeakMapConstructor::construct(FunctionObject& new_target)
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{
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auto& vm = this->vm();
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auto iterable = vm.argument(0);
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// 2. Let map be ? OrdinaryCreateFromConstructor(NewTarget, "%WeakMap.prototype%", « [[WeakMapData]] »).
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// 3. Set map.[[WeakMapData]] to a new empty List.
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auto map = TRY(ordinary_create_from_constructor<WeakMap>(vm, new_target, &Intrinsics::weak_map_prototype));
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// 4. If iterable is either undefined or null, return map.
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if (iterable.is_nullish())
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return map;
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// 5. Let adder be ? Get(map, "set").
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auto adder = TRY(map->get(vm.names.set));
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// 6. If IsCallable(adder) is false, throw a TypeError exception.
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if (!adder.is_function())
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return vm.throw_completion<TypeError>(ErrorType::NotAFunction, "'set' property of WeakMap");
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// 7. Return ? AddEntriesFromIterable(map, iterable, adder).
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(void)TRY(get_iterator_values(vm, iterable, [&](Value iterator_value) -> Optional<Completion> {
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if (auto object = iterator_value.as_if<Object>()) {
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auto key = TRY(object->get(0));
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auto value = TRY(object->get(1));
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TRY(JS::call(vm, adder.as_function(), map, key, value));
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return {};
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}
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return vm.throw_completion<TypeError>(ErrorType::NotAnObject, Utf16String::formatted("Iterator value {}", iterator_value));
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}));
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return map;
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}
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}
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