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LibJS: Implement proper Iterator records
Instead of using plain objects as Iterator records, causes confusion about the object itself actually being its [[Iterator]] slot, and requires non-standard type conversion shenanigans fpr the [[NextValue]] and [[Done]] internal slots, implement a proper Iterator record struct and use it throughout. Also annotate the remaining Iterator AOs with spec comments while we're here.
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17 changed files with 337 additions and 209 deletions
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@ -1,5 +1,5 @@
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/*
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* Copyright (c) 2021, Linus Groh <linusg@serenityos.org>
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* Copyright (c) 2021-2022, Linus Groh <linusg@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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@ -612,7 +612,7 @@ ThrowCompletionOr<MarkedValueList> get_possible_instants_for(GlobalObject& globa
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auto possible_instants = TRY(time_zone.invoke(global_object, vm.names.getPossibleInstantsFor, &date_time));
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// 3. Let iteratorRecord be ? GetIterator(possibleInstants, sync).
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auto* iterator = TRY(get_iterator(global_object, possible_instants, IteratorHint::Sync));
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auto iterator = TRY(get_iterator(global_object, possible_instants, IteratorHint::Sync));
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// 4. Let list be a new empty List.
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auto list = MarkedValueList { vm.heap() };
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@ -623,7 +623,7 @@ ThrowCompletionOr<MarkedValueList> get_possible_instants_for(GlobalObject& globa
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// 6. Repeat, while next is not false,
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do {
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// a. Set next to ? IteratorStep(iteratorRecord).
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next = TRY(iterator_step(global_object, *iterator));
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next = TRY(iterator_step(global_object, iterator));
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// b. If next is not false, then
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if (next) {
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@ -636,7 +636,7 @@ ThrowCompletionOr<MarkedValueList> get_possible_instants_for(GlobalObject& globa
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auto completion = vm.throw_completion<TypeError>(global_object, ErrorType::NotAnObjectOfType, "Temporal.Instant");
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// 2. Return ? IteratorClose(iteratorRecord, completion).
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return iterator_close(*iterator, move(completion));
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return iterator_close(global_object, iterator, move(completion));
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}
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// iii. Append nextValue to the end of the List list.
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