[webkit-changes] [WebKit/WebKit] 380f93: [JSC] Parse a critical flag on TZ annotation for T...

[SUZUKI Sosuke]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 380f93b87d14ee78a1e693ac3794e0588e874d64
      https://github.com/WebKit/WebKit/commit/380f93b87d14ee78a1e693ac3794e0588e874d64
  Author: Sosuke Suzuki <aosukeke at gmail.com>
  Date:   2024-08-13 (Tue, 13 Aug 2024)

  Changed paths:
    A JSTests/stress/temporal-instant-tz-critical-flags.js
    A JSTests/stress/temporal-plaindate-tz-critical-flags.js
    A JSTests/stress/temporal-plaindatetime-tz-critical-flags.js
    A JSTests/stress/temporal-plaintime-tz-critical-flags.js
    M JSTests/test262/expectations.yaml
    M Source/JavaScriptCore/runtime/ISO8601.cpp

  Log Message:
  -----------
  [JSC] Parse a critical flag on TZ annotation for Temporal
https://bugs.webkit.org/show_bug.cgi?id=277942

Reviewed by Yusuke Suzuki.

RFC 3339[1] and RFC 9557[2] allows that bracketed timezone annotations include a critical flag(!)[3].
It indicate that the parsing should be rejected if there is a conflict between the offset and the
timezone annotation.

Temporal API has added this feature into the spec[4]. While the critical flag does not affect the
behavior of Temporal, parsing must still succeed.

Currently, JSC throws an error when creating a Temporal object from a string that includes a
critical flag.

This patch changes to allow creating Temporal objects from strings that include a critical flag.

[1]: https://www.rfc-editor.org/rfc/rfc3339
[2]: https://www.rfc-editor.org/rfc/rfc9557
[3]: https://www.rfc-editor.org/rfc/rfc9557.html#name-inconsistent-time-offset-an
[4]: https://github.com/tc39/proposal-temporal/pull/2397

* JSTests/stress/temporal-instant-tz-critical-flags.js: Added.
* JSTests/stress/temporal-plaindate-tz-critical-flags.js: Added.
* JSTests/stress/temporal-plaindatetime-tz-critical-flags.js: Added.
* JSTests/stress/temporal-plaintime-tz-critical-flags.js: Added.
* JSTests/test262/expectations.yaml:
* Source/JavaScriptCore/runtime/ISO8601.cpp:
(JSC::ISO8601::parseTimeZoneBracketedAnnotation):

Canonical link: https://commits.webkit.org/282211@main



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