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LibJS: Implement Temporal.PlainDateTime.prototype.since/until

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Timothy Flynn 2024-11-23 18:44:57 -05:00 • committed by Andreas Kling
commit 906d951104
Notes: github-actions[bot] 2024-11-24 10:45:21 +00:00
6 changed files with 244 additions and 0 deletions
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36
Libraries/LibJS/Runtime/Temporal/PlainDateTime.cpp
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@ -367,6 +367,42 @@ ThrowCompletionOr<Crypto::BigFraction> difference_plain_date_time_with_total(VM&
return TRY(total_relative_duration(vm, diff, dest_epoch_ns, iso_date_time1, {}, calendar, unit));
}
// 5.5.15 DifferenceTemporalPlainDateTime ( operation, dateTime, other, options ), https://tc39.es/proposal-temporal/#sec-temporal-differencetemporalplaindatetime
ThrowCompletionOr<GC::Ref<Duration>> difference_temporal_plain_date_time(VM& vm, DurationOperation operation, PlainDateTime const& date_time, Value other_value, Value options)
{
// 1. Set other to ? ToTemporalDateTime(other).
auto other = TRY(to_temporal_date_time(vm, other_value));
// 2. If CalendarEquals(dateTime.[[Calendar]], other.[[Calendar]]) is false, throw a RangeError exception.
if (!calendar_equals(date_time.calendar(), other->calendar()))
return vm.throw_completion<RangeError>(ErrorType::TemporalDifferentCalendars);
// 3. Let resolvedOptions be ? GetOptionsObject(options).
auto resolved_options = TRY(get_options_object(vm, options));
// 4. Let settings be ? GetDifferenceSettings(operation, resolvedOptions, DATETIME, « », NANOSECOND, DAY).
auto settings = TRY(get_difference_settings(vm, operation, resolved_options, UnitGroup::DateTime, {}, Unit::Nanosecond, Unit::Day));
// 5. If CompareISODateTime(dateTime.[[ISODateTime]], other.[[ISODateTime]]) = 0, then
if (compare_iso_date_time(date_time.iso_date_time(), other->iso_date_time()) == 0) {
// a. Return ! CreateTemporalDuration(0, 0, 0, 0, 0, 0, 0, 0, 0, 0).
return MUST(create_temporal_duration(vm, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0));
}
// 6. Let internalDuration be ? DifferencePlainDateTimeWithRounding(dateTime.[[ISODateTime]], other.[[ISODateTime]], dateTime.[[Calendar]], settings.[[LargestUnit]], settings.[[RoundingIncrement]], settings.[[SmallestUnit]], settings.[[RoundingMode]]).
auto internal_duration = TRY(difference_plain_date_time_with_rounding(vm, date_time.iso_date_time(), other->iso_date_time(), date_time.calendar(), settings.largest_unit, settings.rounding_increment, settings.smallest_unit, settings.rounding_mode));
// 7. Let result be ? TemporalDurationFromInternal(internalDuration, settings.[[LargestUnit]]).
auto result = TRY(temporal_duration_from_internal(vm, internal_duration, settings.largest_unit));
// 8. If operation is SINCE, set result to CreateNegatedTemporalDuration(result).
if (operation == DurationOperation::Since)
result = create_negated_temporal_duration(vm, result);
// 9. Return result.
return result;
}
// 5.5.16 AddDurationToDateTime ( operation, dateTime, temporalDurationLike, options ), https://tc39.es/proposal-temporal/#sec-temporal-adddurationtodatetime
ThrowCompletionOr<GC::Ref<PlainDateTime>> add_duration_to_date_time(VM& vm, ArithmeticOperation operation, PlainDateTime const& date_time, Value temporal_duration_like, Value options)
{