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LibJS: Add fast path TimeZone conversion to PlainDate#toZonedDateTime

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This is a normative chane in the Temporal spec.

See: fcab1af
This commit is contained in:
Luke Wilde 2022-10-16 00:43:13 +01:00 • committed by Linus Groh
parent 707f12f927
commit 35c9e324b4
2 changed files with 42 additions and 12 deletions
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34
Userland/Libraries/LibJS/Runtime/Temporal/PlainDatePrototype.cpp
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@ -525,23 +525,33 @@ JS_DEFINE_NATIVE_FUNCTION(PlainDatePrototype::to_zoned_date_time)
// 3. If Type(item) is Object, then
if (item.is_object()) {
// a. Let timeZoneLike be ? Get(item, "timeZone").
auto time_zone_like = TRY(item.as_object().get(vm.names.timeZone));
// b. If timeZoneLike is undefined, then
if (time_zone_like.is_undefined()) {
// i. Let timeZone be ? ToTemporalTimeZone(item).
time_zone = TRY(to_temporal_time_zone(vm, item));
// a. If item has an [[InitializedTemporalTimeZone]] internal slot, then
if (is<TimeZone>(item.as_object())) {
// i. Let timeZone be item.
time_zone = &item.as_object();
// ii. Let temporalTime be undefined.
}
// c. Else,
// b. Else,
else {
// i. Let timeZone be ? ToTemporalTimeZone(timeZoneLike).
time_zone = TRY(to_temporal_time_zone(vm, time_zone_like));
// i. Let timeZoneLike be ? Get(item, "timeZone").
auto time_zone_like = TRY(item.as_object().get(vm.names.timeZone));
// ii. Let temporalTime be ? Get(item, "plainTime").
temporal_time_value = TRY(item.as_object().get(vm.names.plainTime));
// ii. If timeZoneLike is undefined, then
if (time_zone_like.is_undefined()) {
// 1. Let timeZone be ? ToTemporalTimeZone(item).
time_zone = TRY(to_temporal_time_zone(vm, item));
// 2. Let temporalTime be undefined.
}
// iii. Else,
else {
// 1. Let timeZone be ? ToTemporalTimeZone(timeZoneLike).
time_zone = TRY(to_temporal_time_zone(vm, time_zone_like));
// 2. Let temporalTime be ? Get(item, "plainTime").
temporal_time_value = TRY(item.as_object().get(vm.names.plainTime));
}
}
}
// 4. Else,