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Normative: add Iterator Helpers #3395

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merged 1 commit into from
Oct 20, 2024
Merged

Normative: add Iterator Helpers #3395

merged 1 commit into from
Oct 20, 2024
+545 −21

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@michaelficarra michaelficarra added normative change Affects behavior required to correctly evaluate some ECMAScript source text pending stage 4 This proposal has not yet achieved stage 4, but may otherwise be ready to merge. proposal This is related to a specific proposal, and will be closed/merged when the proposal reaches stage 4. labels Aug 16, 2024
@michaelficarra michaelficarra mentioned this pull request Aug 16, 2024
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michaelficarra
michaelficarra commented Aug 16, 2024
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spec.html
@@ -6956,6 +6996,28 @@ <h1>
</emu-alg>
</emu-clause>

<emu-clause id="sec-getiteratorflattenable" type="abstract operation">
<h1>
GetIteratorFlattenable (
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I would love to come up with a better name for this AO.

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This comment was about GetIteratorFlattenable (it's no longer displaying under the appropriate line in the diff view).

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looks right on the conversation view, at least

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jmdyck previously requested changes Aug 20, 2024
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@michaelficarra michaelficarra force-pushed the iterator-helpers-integration branch 2 times, most recently from 2255ce1 to 0cb2376 Compare September 5, 2024 00:03
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FYI we're having a relevant editorial discussion here: tc39/proposal-joint-iteration#30

@michaelficarra michaelficarra force-pushed the iterator-helpers-integration branch 2 times, most recently from 322876c to 380047c Compare September 23, 2024 21:10
ljharb
ljharb reviewed Sep 26, 2024
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This PR seems to be missing changes to CreateIteratorFromClosure to add a 4th argument? (present in the proposal spec)

syg
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@michaelficarra michaelficarra mentioned this pull request Sep 27, 2024
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@michaelficarra michaelficarra added has stage 4 This PR represents a proposal that has achieved stage 4, and is ready to merge. and removed pending stage 4 This proposal has not yet achieved stage 4, but may otherwise be ready to merge. labels Oct 8, 2024
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@tc39/ecma262-editors Do we want to make the [[UnderlyingIterator]] internal slot plural (as is required by upcoming proposal joint iteration) as part of this PR, or should we do it in 2 phases?

@michaelficarra michaelficarra added the editor call to be discussed in the next editor call label Oct 10, 2024
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bakkot approved these changes Oct 17, 2024
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LGTM. I no longer think we should rename [[UnderlyingIterators]] now, since it would also involve changing its handling; we can do that in the followup.

@michaelficarra michaelficarra added ready to merge Editors believe this PR needs no further reviews, and is ready to land. and removed editor call to be discussed in the next editor call labels Oct 17, 2024
jmdyck
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spec.html
1. If _O_.[[GeneratorState]] is ~suspended-start~, then
1. Set _O_.[[GeneratorState]] to ~completed~.
1. NOTE: Once a generator enters the completed state it never leaves it and its associated execution context is never resumed. Any execution state associated with _O_ can be discarded at this point.
1. Perform ? IteratorClose(_O_.[[UnderlyingIterator]], ReturnCompletion(*undefined*)).
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It seems like this Return Completion could be returned by IteratorClose, and thus by this algorithm, and thus by the [[Call]] for this built-in. But the invariants for essential internal methods don't allow [[Call]] to return a Return Completion.

@michaelficarra @jmdyck @ljharb
Normative: add Iterator Helpers (#3395)
961f269 
Co-authored-by: Michael Ficarra <[email protected]>
Co-authored-by: Michael Dyck <[email protected]>
@ljharb ljharb force-pushed the iterator-helpers-integration branch from 60fcae2 to 961f269 Compare October 20, 2024 21:29
@ljharb ljharb dismissed jmdyck’s stale review October 20, 2024 21:45

changes addressed

@ljharb ljharb merged commit 961f269 into main Oct 20, 2024
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@ljharb ljharb deleted the iterator-helpers-integration branch October 20, 2024 21:45
@michaelficarra michaelficarra added the editor call to be discussed in the next editor call label Oct 21, 2024
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@bakkot bakkot removed the editor call to be discussed in the next editor call label Oct 23, 2024
domenic added a commit to whatwg/webidl that referenced this pull request Oct 28, 2024
@domenic
Fix Iterator prototype reference
a9d3bf6 
Follows tc39/ecma262#3395.
@domenic domenic mentioned this pull request Oct 28, 2024
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Fix Iterator prototype reference
33c2eec 
Follows tc39/ecma262#3395.
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has stage 4 This PR represents a proposal that has achieved stage 4, and is ready to merge. normative change Affects behavior required to correctly evaluate some ECMAScript source text proposal This is related to a specific proposal, and will be closed/merged when the proposal reaches stage 4. ready to merge Editors believe this PR needs no further reviews, and is ready to land.
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