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LibJS: Implement Temporal.ZonedDateTime.prototype.startOfDay

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Luke Wilde 2021-11-03 20:22:55 +00:00 • committed by Linus Groh
parent 98accad9ba
commit c001926752
4 changed files with 77 additions and 0 deletions
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1
Userland/Libraries/LibJS/Runtime/CommonPropertyNames.h
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@ -416,6 +416,7 @@ namespace JS {
P(source) \
P(splice) \
P(sqrt) \
P(startOfDay) \
P(startsWith) \
P(status) \
P(sticky) \

30
Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTimePrototype.cpp
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@ -65,6 +65,7 @@ void ZonedDateTimePrototype::initialize(GlobalObject& global_object)
u8 attr = Attribute::Writable | Attribute::Configurable;
define_native_function(vm.names.valueOf, value_of, 0, attr);
define_native_function(vm.names.startOfDay, start_of_day, 0, attr);
define_native_function(vm.names.toInstant, to_instant, 0, attr);
define_native_function(vm.names.toPlainDate, to_plain_date, 0, attr);
define_native_function(vm.names.toPlainTime, to_plain_time, 0, attr);
@ -708,6 +709,35 @@ JS_DEFINE_NATIVE_FUNCTION(ZonedDateTimePrototype::value_of)
return vm.throw_completion<TypeError>(global_object, ErrorType::Convert, "Temporal.ZonedDateTime", "a primitive value");
}
// 6.3.45 Temporal.ZonedDateTime.prototype.startOfDay ( ), https://tc39.es/proposal-temporal/#sec-temporal.zoneddatetime.prototype.startofday
JS_DEFINE_NATIVE_FUNCTION(ZonedDateTimePrototype::start_of_day)
{
// 1. Let zonedDateTime be the this value.
// 2. Perform ? RequireInternalSlot(zonedDateTime, [[InitializedTemporalZonedDateTime]]).
auto* zoned_date_time = TRY(typed_this_object(global_object));
// 3. Let timeZone be zonedDateTime.[[TimeZone]].
auto& time_zone = zoned_date_time->time_zone();
// 4. Let calendar be zonedDateTime.[[Calendar]].
auto& calendar = zoned_date_time->calendar();
// 5. Let instant be ! CreateTemporalInstant(zonedDateTime.[[Nanoseconds]]).
auto* instant = MUST(create_temporal_instant(global_object, zoned_date_time->nanoseconds()));
// 6. Let temporalDateTime be ? BuiltinTimeZoneGetPlainDateTimeFor(timeZone, instant, calendar).
auto* temporal_date_time = TRY(builtin_time_zone_get_plain_date_time_for(global_object, &time_zone, *instant, calendar));
// 7. Let startDateTime be ? CreateTemporalDateTime(temporalDateTime.[[ISOYear]], temporalDateTime.[[ISOMonth]], temporalDateTime.[[ISODay]], 0, 0, 0, 0, 0, 0, calendar).
auto* start_date_time = TRY(create_temporal_date_time(global_object, temporal_date_time->iso_year(), temporal_date_time->iso_month(), temporal_date_time->iso_day(), 0, 0, 0, 0, 0, 0, calendar));
// 8. Let startInstant be ? BuiltinTimeZoneGetInstantFor(timeZone, startDateTime, "compatible").
auto* start_instant = TRY(builtin_time_zone_get_instant_for(global_object, &time_zone, *start_date_time, "compatible"sv));
// 9. Return ! CreateTemporalZonedDateTime(startInstant.[[Nanoseconds]], timeZone, calendar).
return MUST(create_temporal_zoned_date_time(global_object, start_instant->nanoseconds(), time_zone, calendar));
}
// 6.3.46 Temporal.ZonedDateTime.prototype.toInstant ( ), https://tc39.es/proposal-temporal/#sec-temporal.zoneddatetime.prototype.toinstant
JS_DEFINE_NATIVE_FUNCTION(ZonedDateTimePrototype::to_instant)
{

1
Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTimePrototype.h
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@ -50,6 +50,7 @@ private:
JS_DECLARE_NATIVE_FUNCTION(era_getter);
JS_DECLARE_NATIVE_FUNCTION(era_year_getter);
JS_DECLARE_NATIVE_FUNCTION(value_of);
JS_DECLARE_NATIVE_FUNCTION(start_of_day);
JS_DECLARE_NATIVE_FUNCTION(to_instant);
JS_DECLARE_NATIVE_FUNCTION(to_plain_date);
JS_DECLARE_NATIVE_FUNCTION(to_plain_time);