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LibJS: Fast-path ToTemporalTimeZone when the argument is a TimeZone
This is a normative change in the Temporal spec.
See: 54cea53
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2 changed files with 28 additions and 4 deletions
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@ -292,7 +292,13 @@ ThrowCompletionOr<Object*> to_temporal_time_zone(VM& vm, Value temporal_time_zon
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{
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// 1. If Type(temporalTimeZoneLike) is Object, then
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if (temporal_time_zone_like.is_object()) {
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// a. If temporalTimeZoneLike has an [[InitializedTemporalZonedDateTime]] internal slot, then
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// a. If temporalTimeZoneLike has an [[InitializedTemporalTimeZone]] internal slot, then
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if (is<TimeZone>(temporal_time_zone_like.as_object())) {
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// i. Return temporalTimeZoneLike.
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return &temporal_time_zone_like.as_object();
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}
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// b. If temporalTimeZoneLike has an [[InitializedTemporalZonedDateTime]] internal slot, then
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if (is<ZonedDateTime>(temporal_time_zone_like.as_object())) {
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auto& zoned_date_time = static_cast<ZonedDateTime&>(temporal_time_zone_like.as_object());
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@ -300,14 +306,14 @@ ThrowCompletionOr<Object*> to_temporal_time_zone(VM& vm, Value temporal_time_zon
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return &zoned_date_time.time_zone();
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}
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// b. If ? HasProperty(temporalTimeZoneLike, "timeZone") is false, return temporalTimeZoneLike.
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// c. If ? HasProperty(temporalTimeZoneLike, "timeZone") is false, return temporalTimeZoneLike.
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if (!TRY(temporal_time_zone_like.as_object().has_property(vm.names.timeZone)))
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return &temporal_time_zone_like.as_object();
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// c. Set temporalTimeZoneLike to ? Get(temporalTimeZoneLike, "timeZone").
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// d. Set temporalTimeZoneLike to ? Get(temporalTimeZoneLike, "timeZone").
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temporal_time_zone_like = TRY(temporal_time_zone_like.as_object().get(vm.names.timeZone));
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// d. If Type(temporalTimeZoneLike) is Object and ? HasProperty(temporalTimeZoneLike, "timeZone") is false, return temporalTimeZoneLike.
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// e. If Type(temporalTimeZoneLike) is Object and ? HasProperty(temporalTimeZoneLike, "timeZone") is false, return temporalTimeZoneLike.
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if (temporal_time_zone_like.is_object() && !TRY(temporal_time_zone_like.as_object().has_property(vm.names.timeZone)))
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return &temporal_time_zone_like.as_object();
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}
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