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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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16
Userland/Libraries/LibJS/Runtime/IteratorOperations.h
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@ -1,5 +1,6 @@
/*
* Copyright (c) 2020, Matthew Olsson <mattco@serenityos.org>
* Copyright (c) 2022, Linus Groh <linusg@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@ -9,6 +10,7 @@
#include <AK/Function.h>
#include <AK/Optional.h>
#include <LibJS/Runtime/Completion.h>
#include <LibJS/Runtime/Iterator.h>
#include <LibJS/Runtime/Object.h>
namespace JS {
@ -20,17 +22,17 @@ enum class IteratorHint {
Async,
};
ThrowCompletionOr<Object*> get_iterator(GlobalObject&, Value value, IteratorHint hint = IteratorHint::Sync, Optional<Value> method = {});
ThrowCompletionOr<Object*> iterator_next(Object& iterator, Optional<Value> value = {});
ThrowCompletionOr<Object*> iterator_step(GlobalObject&, Object& iterator);
ThrowCompletionOr<Iterator> get_iterator(GlobalObject&, Value, IteratorHint = IteratorHint::Sync, Optional<Value> method = {});
ThrowCompletionOr<Object*> iterator_next(GlobalObject&, Iterator const&, Optional<Value> = {});
ThrowCompletionOr<Object*> iterator_step(GlobalObject&, Iterator const&);
ThrowCompletionOr<bool> iterator_complete(GlobalObject&, Object& iterator_result);
ThrowCompletionOr<Value> iterator_value(GlobalObject&, Object& iterator_result);
Completion iterator_close(Object& iterator, Completion completion);
Completion async_iterator_close(Object& iterator, Completion completion);
Object* create_iterator_result_object(GlobalObject&, Value value, bool done);
Completion iterator_close(GlobalObject&, Iterator const&, Completion);
Completion async_iterator_close(GlobalObject&, Iterator const&, Completion);
Object* create_iterator_result_object(GlobalObject&, Value, bool done);
ThrowCompletionOr<MarkedValueList> iterable_to_list(GlobalObject&, Value iterable, Optional<Value> method = {});
using IteratorValueCallback = Function<Optional<Completion>(Value)>;
Completion get_iterator_values(GlobalObject& global_object, Value iterable, IteratorValueCallback callback, Optional<Value> method = {});
Completion get_iterator_values(GlobalObject&, Value iterable, IteratorValueCallback callback, Optional<Value> method = {});
}