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LibJS: Replace Temporal's BalanceISODate with AddDaysToISODate

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This is an editorial change in the Temporal proposal. See:
https://github.com/tc39/proposal-temporal/commit/b28ef08
This commit is contained in:
Timothy Flynn
2026-01-13 12:31:52 -05:00
committed by Tim Flynn
parent 14ccc87190
commit 3eabdcf460
Notes: github-actions[bot] 2026-01-13 18:03:25 +00:00 
Author: https://github.com/trflynn89
Commit: https://github.com/LadybirdBrowser/ladybird/commit/3eabdcf4606
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/7458
8 changed files with 38 additions and 38 deletions
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6
Libraries/LibJS/Runtime/Temporal/ZonedDateTime.cpp
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@@ -1,7 +1,7 @@
/*
* Copyright (c) 2021-2023, Linus Groh <linusg@serenityos.org>
* Copyright (c) 2021-2023, Luke Wilde <lukew@serenityos.org>
* Copyright (c) 2024-2025, Tim Flynn <trflynn89@ladybird.org>
* Copyright (c) 2024-2026, Tim Flynn <trflynn89@ladybird.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@@ -470,8 +470,8 @@ ThrowCompletionOr<InternalDuration> difference_zoned_date_time(VM& vm, Crypto::S
// 11. Repeat, while dayCorrection ≤ maxDayCorrection and success is false,
while (day_correction <= max_day_correction && !success) {
// a. Let intermediateDate be BalanceISODate(endDateTime.[[ISODate]].[[Year]], endDateTime.[[ISODate]].[[Month]], endDateTime.[[ISODate]].[[Day]] - dayCorrection × sign).
auto intermediate_date = balance_iso_date(end_date_time.iso_date.year, end_date_time.iso_date.month, static_cast<double>(end_date_time.iso_date.day) - (day_correction * sign));
// a. Let intermediateDate be AddDaysToISODate(endDateTime.[[ISODate]], dayCorrection × -sign).
auto intermediate_date = add_days_to_iso_date(end_date_time.iso_date, day_correction * -sign);
// b. Let intermediateDateTime be CombineISODateAndTimeRecord(intermediateDate, startDateTime.[[Time]]).
intermediate_date_time = combine_iso_date_and_time_record(intermediate_date, start_date_time.time);