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https://github.com/LadybirdBrowser/ladybird.git
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50428ea8d2
Intrinsics, i.e. mostly constructor and prototype objects, but also things like empty and new object shape now live on a new heap-allocated JS::Intrinsics object, thus completing the long journey of taking all the magic away from the global object. This represents the Realm's [[Intrinsics]] slot in the spec and matches its existing [[GlobalObject]] / [[GlobalEnv]] slots in terms of architecture. In the majority of cases it should now be possibly to fully allocate a regular object without the global object existing, and in fact that's what we do now - the realm is allocated before the global object, and the intrinsics between both :^)
67 lines
2.2 KiB
C++
67 lines
2.2 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(Realm& realm)
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: NativeFunction(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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NativeFunction::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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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<Object*> WeakMapConstructor::construct(FunctionObject& new_target)
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{
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auto& vm = this->vm();
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auto* weak_map = TRY(ordinary_create_from_constructor<WeakMap>(vm, new_target, &Intrinsics::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(weak_map->get(vm.names.set));
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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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(void)TRY(get_iterator_values(vm, vm.argument(0), [&](Value iterator_value) -> Optional<Completion> {
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if (!iterator_value.is_object())
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return vm.throw_completion<TypeError>(ErrorType::NotAnObject, String::formatted("Iterator value {}", iterator_value.to_string_without_side_effects()));
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auto key = TRY(iterator_value.as_object().get(0));
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auto value = TRY(iterator_value.as_object().get(1));
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TRY(JS::call(vm, adder.as_function(), weak_map, key, value));
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return {};
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}));
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return weak_map;
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}
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}
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