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18847fca50
This is an editorial change in the ECMA-262 spec. See: https://github.com/tc39/ecma262/commit/12d3687 Note they have not yet updated all potential consumers to use this new AO.
90 lines
2.9 KiB
C++
90 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/Iterator.h>
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#include <LibJS/Runtime/Set.h>
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#include <LibJS/Runtime/SetConstructor.h>
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namespace JS {
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JS_DEFINE_ALLOCATOR(SetConstructor);
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SetConstructor::SetConstructor(Realm& realm)
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: NativeFunction(realm.vm().names.Set.as_string(), realm.intrinsics().function_prototype())
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{
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}
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void SetConstructor::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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// 24.2.2.1 Set.prototype, https://tc39.es/ecma262/#sec-set.prototype
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define_direct_property(vm.names.prototype, realm.intrinsics().set_prototype(), 0);
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define_native_accessor(realm, vm.well_known_symbol_species(), symbol_species_getter, {}, Attribute::Configurable);
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define_direct_property(vm.names.length, Value(0), Attribute::Configurable);
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}
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// 24.2.1.1 Set ( [ iterable ] ), https://tc39.es/ecma262/#sec-set-iterable
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ThrowCompletionOr<Value> SetConstructor::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.Set);
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}
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// 24.2.1.1 Set ( [ iterable ] ), https://tc39.es/ecma262/#sec-set-iterable
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ThrowCompletionOr<NonnullGCPtr<Object>> SetConstructor::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 set be ? OrdinaryCreateFromConstructor(NewTarget, "%Set.prototype%", « [[SetData]] »).
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auto set = TRY(ordinary_create_from_constructor<Set>(vm, new_target, &Intrinsics::set_prototype));
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// 3. Set set.[[SetData]] to a new empty List.
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// 4. If iterable is either undefined or null, return set.
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if (iterable.is_nullish())
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return set;
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// 5. Let adder be ? Get(set, "add").
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auto adder = TRY(set->get(vm.names.add));
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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, "'add' property of Set");
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// 7. Let iteratorRecord be ? GetIterator(iterable, sync).
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// 8. Repeat,
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(void)TRY(get_iterator_values(vm, iterable, [&](Value next) -> Optional<Completion> {
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// a. Let next be ? IteratorStepValue(iteratorRecord).
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// b. If next is DONE, return set.
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// c. Let status be Completion(Call(adder, set, « nextValue »)).
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// d. IfAbruptCloseIterator(status, iteratorRecord).
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TRY(JS::call(vm, adder.as_function(), set, next));
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return {};
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}));
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// b. If next is false, return set.
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return set;
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}
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// 24.2.2.2 get Set [ @@species ], https://tc39.es/ecma262/#sec-get-set-@@species
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JS_DEFINE_NATIVE_FUNCTION(SetConstructor::symbol_species_getter)
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{
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// 1. Return the this value.
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return vm.this_value();
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}
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}
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