[webkit-changes] [WebKit/WebKit] 845ee7: [JSC] `Temporal.Instant.prototype.epochMillisecond...

[SUZUKI Sosuke]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 845ee710b8ee7b4623e523bdb63ae7fb8aceed93
      https://github.com/WebKit/WebKit/commit/845ee710b8ee7b4623e523bdb63ae7fb8aceed93
  Author: Sosuke Suzuki <aosukeke at gmail.com>
  Date:   2024-08-25 (Sun, 25 Aug 2024)

  Changed paths:
    M JSTests/stress/temporal-instant.js
    M JSTests/test262/expectations.yaml
    M Source/JavaScriptCore/runtime/ISO8601.h
    M Source/JavaScriptCore/runtime/TemporalInstantPrototype.cpp

  Log Message:
  -----------
  [JSC] `Temporal.Instant.prototype.epochMilliseconds` should return floored value
https://bugs.webkit.org/show_bug.cgi?id=278300

Reviewed by Yusuke Suzuki.

According to the latest Temporal spec [1], `Temporal.Instant.prototype.epochMilliseconds` should
return a floored value.

However, the current implementation in JSC returns a truncated value instead of a floored one.

This patch changes `Temporal.Instant.prototype.epochMilliseconds` to return a floored value.

[1]: https://tc39.es/proposal-temporal/#sec-get-temporal.instant.prototype.epochmilliseconds

* JSTests/stress/temporal-instant.js:
(instants.forEach):
* JSTests/test262/expectations.yaml:
* Source/JavaScriptCore/runtime/ISO8601.h:
* Source/JavaScriptCore/runtime/TemporalInstantPrototype.cpp:
(JSC::JSC_DEFINE_CUSTOM_GETTER):

Canonical link: https://commits.webkit.org/282718@main



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