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LibJS: Implement proper Iterator records

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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.
This commit is contained in:
Linus Groh 2022-01-09 19:12:24 +01:00
parent e141f1e976
commit 09a11fa6ea
17 changed files with 337 additions and 209 deletions
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8
Userland/Libraries/LibJS/Runtime/Temporal/TimeZone.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2021, Linus Groh <linusg@serenityos.org>
* Copyright (c) 2021-2022, Linus Groh <linusg@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@ -612,7 +612,7 @@ ThrowCompletionOr<MarkedValueList> get_possible_instants_for(GlobalObject& globa
auto possible_instants = TRY(time_zone.invoke(global_object, vm.names.getPossibleInstantsFor, &date_time));
// 3. Let iteratorRecord be ? GetIterator(possibleInstants, sync).
auto* iterator = TRY(get_iterator(global_object, possible_instants, IteratorHint::Sync));
auto iterator = TRY(get_iterator(global_object, possible_instants, IteratorHint::Sync));
// 4. Let list be a new empty List.
auto list = MarkedValueList { vm.heap() };
@ -623,7 +623,7 @@ ThrowCompletionOr<MarkedValueList> get_possible_instants_for(GlobalObject& globa
// 6. Repeat, while next is not false,
do {
// a. Set next to ? IteratorStep(iteratorRecord).
next = TRY(iterator_step(global_object, *iterator));
next = TRY(iterator_step(global_object, iterator));
// b. If next is not false, then
if (next) {
@ -636,7 +636,7 @@ ThrowCompletionOr<MarkedValueList> get_possible_instants_for(GlobalObject& globa
auto completion = vm.throw_completion<TypeError>(global_object, ErrorType::NotAnObjectOfType, "Temporal.Instant");
// 2. Return ? IteratorClose(iteratorRecord, completion).
return iterator_close(*iterator, move(completion));
return iterator_close(global_object, iterator, move(completion));
}
// iii. Append nextValue to the end of the List list.