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LibJS: Catch up DifferenceTemporalPlainYearMonth somewhat to the spec

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The spec has moved along quite a bit since this was originally
implemented. Catch up on at least some of these changes, and leave
FIXMEs for what is missing.

No change to test262.
This commit is contained in:
Shannon Booth 2024-01-04 20:02:36 +13:00 • committed by Andrew Kaster
parent d2710ad73f
commit 9f7e27564c
1 changed files with 57 additions and 35 deletions
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92
Userland/Libraries/LibJS/Runtime/Temporal/PlainYearMonth.cpp
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@ -247,45 +247,67 @@ ThrowCompletionOr<Duration*> difference_temporal_plain_year_month(VM& vm, Differ
if (!TRY(calendar_equals(vm, calendar, other->calendar())))
return vm.throw_completion<RangeError>(ErrorType::TemporalDifferentCalendars);
// 5. Let settings be ? GetDifferenceSettings(operation, options, date, « "week", "day" », "month", "year").
auto settings = TRY(get_difference_settings(vm, operation, options_value, UnitGroup::Date, { "week"sv, "day"sv }, { "month"sv }, "year"sv));
// 5. Let resolvedOptions be ? SnapshotOwnProperties(? GetOptionsObject(options), null).
auto resolved_options = TRY(TRY(get_options_object(vm, options_value))->snapshot_own_properties(vm, nullptr));
// 6. Let fieldNames be ? CalendarFields(calendar, « "monthCode", "year" »).
auto field_names = TRY(calendar_fields(vm, calendar, { "monthCode"sv, "year"sv }));
// 6. Let settings be ? GetDifferenceSettings(operation, resolvedOptions, date, « "week", "day" », "month", "year").
auto settings = TRY(get_difference_settings(vm, operation, resolved_options, UnitGroup::Date, { "week"sv, "day"sv }, { "month"sv }, "year"sv));
// 7. Let otherFields be ? PrepareTemporalFields(other, fieldNames, «»).
auto* other_fields = TRY(prepare_temporal_fields(vm, *other, field_names, Vector<StringView> {}));
// 8. Perform ! CreateDataPropertyOrThrow(otherFields, "day", 1𝔽).
MUST(other_fields->create_data_property_or_throw(vm.names.day, Value(1)));
// 9. Let otherDate be ? CalendarDateFromFields(calendar, otherFields).
auto* other_date = TRY(calendar_date_from_fields(vm, calendar, *other_fields));
// 10. Let thisFields be ? PrepareTemporalFields(yearMonth, fieldNames, «»).
auto* this_fields = TRY(prepare_temporal_fields(vm, year_month, field_names, Vector<StringView> {}));
// 11. Perform ! CreateDataPropertyOrThrow(thisFields, "day", 1𝔽).
MUST(this_fields->create_data_property_or_throw(vm.names.day, Value(1)));
// 12. Let thisDate be ? CalendarDateFromFields(calendar, thisFields).
auto* this_date = TRY(calendar_date_from_fields(vm, calendar, *this_fields));
// 13. Let untilOptions be ? MergeLargestUnitOption(settings.[[Options]], settings.[[LargestUnit]]).
auto* until_options = TRY(merge_largest_unit_option(vm, settings.options, move(settings.largest_unit)));
// 14. Let result be ? CalendarDateUntil(calendar, thisDate, otherDate, untilOptions).
auto* duration = TRY(calendar_date_until(vm, calendar, this_date, other_date, *until_options));
auto result = DurationRecord { duration->years(), duration->months(), 0, 0, 0, 0, 0, 0, 0, 0 };
// 15. If settings.[[SmallestUnit]] is not "month" or settings.[[RoundingIncrement]] ≠ 1, then
if (settings.smallest_unit != "month"sv || settings.rounding_increment != 1) {
// a. Set result to (? RoundDuration(result.[[Years]], result.[[Months]], 0, 0, 0, 0, 0, 0, 0, 0, settings.[[RoundingIncrement]], settings.[[SmallestUnit]], settings.[[RoundingMode]], thisDate)).[[DurationRecord]].
result = TRY(round_duration(vm, result.years, result.months, 0, 0, 0, 0, 0, 0, 0, 0, settings.rounding_increment, settings.smallest_unit, settings.rounding_mode, this_date)).duration_record;
// 7. If yearMonth.[[ISOYear]] = other.[[ISOYear]] and yearMonth.[[ISOMonth]] = other.[[ISOMonth]] and yearMonth.[[ISODay]] = other.[[ISODay]], then
if (year_month.iso_year() == other->iso_year() && year_month.iso_month() == other->iso_month() && year_month.iso_day() == other->iso_day()) {
// 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));
}
// 16. Return ! CreateTemporalDuration(sign × result.[[Years]], sign × result.[[Months]], 0, 0, 0, 0, 0, 0, 0, 0).
// 8. Perform ! CreateDataPropertyOrThrow(resolvedOptions, "largestUnit", settings.[[LargestUnit]]).
MUST(resolved_options->create_data_property_or_throw(vm.names.largestUnit, PrimitiveString::create(vm, settings.largest_unit)));
// FIXME: 9. Let calendarRec be ? CreateCalendarMethodsRecord(calendar, « dateAdd, dateFromFields, dateUntil, fields »).
// 10. Let fieldNames be ? CalendarFields(calendarRec, « "monthCode", "year" »).
// FIXME: Pass through calendar record
auto field_names = TRY(calendar_fields(vm, calendar, { "monthCode"sv, "year"sv }));
// 11. Let thisFields be ? PrepareTemporalFields(yearMonth, fieldNames, «»).
auto* this_fields = TRY(prepare_temporal_fields(vm, year_month, field_names, Vector<StringView> {}));
// 12. Perform ! CreateDataPropertyOrThrow(thisFields, "day", 1𝔽).
MUST(this_fields->create_data_property_or_throw(vm.names.day, Value(1)));
// 13. Let thisDate be ? CalendarDateFromFields(calendarRec, thisFields).
// FIXME: Pass through calendar record
auto* this_date = TRY(calendar_date_from_fields(vm, calendar, *this_fields));
// 14. Let otherFields be ? PrepareTemporalFields(other, fieldNames, «»).
auto* other_fields = TRY(prepare_temporal_fields(vm, *other, field_names, Vector<StringView> {}));
// 15. Perform ! CreateDataPropertyOrThrow(otherFields, "day", 1𝔽).
MUST(other_fields->create_data_property_or_throw(vm.names.day, Value(1)));
// 16. Let otherDate be ? CalendarDateFromFields(calendarRec, otherFields).
// FIXME: Pass through calendar record
auto* other_date = TRY(calendar_date_from_fields(vm, calendar, *other_fields));
// 17. Perform ! CreateDataPropertyOrThrow(resolvedOptions, "largestUnit", settings.[[LargestUnit]]).
MUST(resolved_options->create_data_property_or_throw(vm.names.largestUnit, PrimitiveString::create(vm, settings.largest_unit)));
// 18. Let result be ? CalendarDateUntil(calendarRec, thisDate, otherDate, resolvedOptions).
// FIXME: Pass through calendar record
auto* duration = TRY(calendar_date_until(vm, calendar, this_date, other_date, *resolved_options));
auto result = DurationRecord { duration->years(), duration->months(), 0, 0, 0, 0, 0, 0, 0, 0 };
// 19. If settings.[[SmallestUnit]] is not "month" or settings.[[RoundingIncrement]] ≠ 1, then
if (settings.smallest_unit != "month"sv || settings.rounding_increment != 1) {
// a. Let roundRecord be ? RoundDuration(result.[[Years]], result.[[Months]], 0, 0, 0, 0, 0, 0, 0, 0, settings.[[RoundingIncrement]], settings.[[SmallestUnit]], settings.[[RoundingMode]], thisDate, calendarRec).
// FIXME: Pass through calendar record
auto round_record = TRY(round_duration(vm, result.years, result.months, 0, 0, 0, 0, 0, 0, 0, 0, settings.rounding_increment, settings.smallest_unit, settings.rounding_mode, this_date));
// FIXME: b. Let roundResult be roundRecord.[[DurationRecord]].
// FIXME: c. Set result to ? BalanceDateDurationRelative(roundResult.[[Years]], roundResult.[[Months]], 0, 0, settings.[[LargestUnit]], settings.[[SmallestUnit]], thisDate, calendarRec).
result = round_record.duration_record;
}
// 20. Return ! CreateTemporalDuration(sign × result.[[Years]], sign × result.[[Months]], 0, 0, 0, 0, 0, 0, 0, 0).
return MUST(create_temporal_duration(vm, sign * result.years, sign * result.months, 0, 0, 0, 0, 0, 0, 0, 0));
}