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LibJS: Fast-path ToTemporalCalendar when the argument is a Calendar
This is a normative change in the Temporal spec.
See: 2a43b39
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2 changed files with 29 additions and 4 deletions
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@ -369,7 +369,14 @@ ThrowCompletionOr<Object*> to_temporal_calendar(VM& vm, Value temporal_calendar_
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// 1. If Type(temporalCalendarLike) is Object, then
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if (temporal_calendar_like.is_object()) {
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auto& temporal_calendar_like_object = temporal_calendar_like.as_object();
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// a. If temporalCalendarLike has an [[InitializedTemporalDate]], [[InitializedTemporalDateTime]], [[InitializedTemporalMonthDay]], [[InitializedTemporalTime]], [[InitializedTemporalYearMonth]], or [[InitializedTemporalZonedDateTime]] internal slot, then
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// a. If temporalCalendarLike has an [[InitializedTemporalCalendar]] internal slot, then
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if (is<Calendar>(temporal_calendar_like_object)) {
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// i. Return temporalCalendarLike.
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return &temporal_calendar_like_object;
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}
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// b. If temporalCalendarLike has an [[InitializedTemporalDate]], [[InitializedTemporalDateTime]], [[InitializedTemporalMonthDay]], [[InitializedTemporalTime]], [[InitializedTemporalYearMonth]], or [[InitializedTemporalZonedDateTime]] internal slot, then
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// i. Return temporalCalendarLike.[[Calendar]].
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if (is<PlainDate>(temporal_calendar_like_object))
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return &static_cast<PlainDate&>(temporal_calendar_like_object).calendar();
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@ -384,14 +391,14 @@ ThrowCompletionOr<Object*> to_temporal_calendar(VM& vm, Value temporal_calendar_
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if (is<ZonedDateTime>(temporal_calendar_like_object))
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return &static_cast<ZonedDateTime&>(temporal_calendar_like_object).calendar();
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// b. If ? HasProperty(temporalCalendarLike, "calendar") is false, return temporalCalendarLike.
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// c. If ? HasProperty(temporalCalendarLike, "calendar") is false, return temporalCalendarLike.
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if (!TRY(temporal_calendar_like_object.has_property(vm.names.calendar)))
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return &temporal_calendar_like_object;
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// c. Set temporalCalendarLike to ? Get(temporalCalendarLike, "calendar").
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// d. Set temporalCalendarLike to ? Get(temporalCalendarLike, "calendar").
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temporal_calendar_like = TRY(temporal_calendar_like_object.get(vm.names.calendar));
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// d. If Type(temporalCalendarLike) is Object and ? HasProperty(temporalCalendarLike, "calendar") is false, return temporalCalendarLike.
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// e. If Type(temporalCalendarLike) is Object and ? HasProperty(temporalCalendarLike, "calendar") is false, return temporalCalendarLike.
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if (temporal_calendar_like.is_object() && !TRY(temporal_calendar_like.as_object().has_property(vm.names.calendar)))
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return &temporal_calendar_like.as_object();
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}
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