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LibJS: Reorganize spec steps for Intl.DateTimeFormat

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This is an editorial change in the Intl spec:
97e1ecc
This commit is contained in:
Timothy Flynn 2022-03-15 10:30:33 -04:00 • committed by Andreas Kling
parent 194ca06f78
commit 1f9c5c186f
6 changed files with 351 additions and 348 deletions
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343
Userland/Libraries/LibJS/Runtime/Intl/DateTimeFormat.cpp
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@ -13,7 +13,6 @@
#include <LibJS/Runtime/Intl/NumberFormat.h>
#include <LibJS/Runtime/Intl/NumberFormatConstructor.h>
#include <LibJS/Runtime/NativeFunction.h>
#include <LibJS/Runtime/Temporal/TimeZone.h>
#include <LibJS/Runtime/Utf16String.h>
#include <LibUnicode/Locale.h>
#include <LibUnicode/NumberFormat.h>
@ -63,313 +62,7 @@ StringView DateTimeFormat::style_to_string(Style style)
}
}
// 11.1.1 InitializeDateTimeFormat ( dateTimeFormat, locales, options ), https://tc39.es/ecma402/#sec-initializedatetimeformat
ThrowCompletionOr<DateTimeFormat*> initialize_date_time_format(GlobalObject& global_object, DateTimeFormat& date_time_format, Value locales_value, Value options_value)
{
auto& vm = global_object.vm();
// 1. Let requestedLocales be ? CanonicalizeLocaleList(locales).
auto requested_locales = TRY(canonicalize_locale_list(global_object, locales_value));
// 2. Let options be ? ToDateTimeOptions(options, "any", "date").
auto* options = TRY(to_date_time_options(global_object, options_value, OptionRequired::Any, OptionDefaults::Date));
// 3. Let opt be a new Record.
LocaleOptions opt {};
// 4. Let matcher be ? GetOption(options, "localeMatcher", "string", « "lookup", "best fit" », "best fit").
auto matcher = TRY(get_option(global_object, *options, vm.names.localeMatcher, Value::Type::String, AK::Array { "lookup"sv, "best fit"sv }, "best fit"sv));
// 5. Set opt.[[localeMatcher]] to matcher.
opt.locale_matcher = matcher;
// 6. Let calendar be ? GetOption(options, "calendar", "string", undefined, undefined).
auto calendar = TRY(get_option(global_object, *options, vm.names.calendar, Value::Type::String, {}, Empty {}));
// 7. If calendar is not undefined, then
if (!calendar.is_undefined()) {
// a. If calendar does not match the Unicode Locale Identifier type nonterminal, throw a RangeError exception.
if (!Unicode::is_type_identifier(calendar.as_string().string()))
return vm.throw_completion<RangeError>(global_object, ErrorType::OptionIsNotValidValue, calendar, "calendar"sv);
// 8. Set opt.[[ca]] to calendar.
opt.ca = calendar.as_string().string();
}
// 9. Let numberingSystem be ? GetOption(options, "numberingSystem", "string", undefined, undefined).
auto numbering_system = TRY(get_option(global_object, *options, vm.names.numberingSystem, Value::Type::String, {}, Empty {}));
// 10. If numberingSystem is not undefined, then
if (!numbering_system.is_undefined()) {
// a. If numberingSystem does not match the Unicode Locale Identifier type nonterminal, throw a RangeError exception.
if (!Unicode::is_type_identifier(numbering_system.as_string().string()))
return vm.throw_completion<RangeError>(global_object, ErrorType::OptionIsNotValidValue, numbering_system, "numberingSystem"sv);
// 11. Set opt.[[nu]] to numberingSystem.
opt.nu = numbering_system.as_string().string();
}
// 12. Let hour12 be ? GetOption(options, "hour12", "boolean", undefined, undefined).
auto hour12 = TRY(get_option(global_object, *options, vm.names.hour12, Value::Type::Boolean, {}, Empty {}));
// 13. Let hourCycle be ? GetOption(options, "hourCycle", "string", « "h11", "h12", "h23", "h24" », undefined).
auto hour_cycle = TRY(get_option(global_object, *options, vm.names.hourCycle, Value::Type::String, AK::Array { "h11"sv, "h12"sv, "h23"sv, "h24"sv }, Empty {}));
// 14. If hour12 is not undefined, then
if (!hour12.is_undefined()) {
// a. Let hourCycle be null.
hour_cycle = js_null();
}
// 15. Set opt.[[hc]] to hourCycle.
if (!hour_cycle.is_nullish())
opt.hc = hour_cycle.as_string().string();
// 16. Let localeData be %DateTimeFormat%.[[LocaleData]].
// 17. Let r be ResolveLocale(%DateTimeFormat%.[[AvailableLocales]], requestedLocales, opt, %DateTimeFormat%.[[RelevantExtensionKeys]], localeData).
auto result = resolve_locale(requested_locales, opt, DateTimeFormat::relevant_extension_keys());
// 18. Set dateTimeFormat.[[Locale]] to r.[[locale]].
date_time_format.set_locale(move(result.locale));
// 19. Let calendar be r.[[ca]].
// 20. Set dateTimeFormat.[[Calendar]] to calendar.
if (result.ca.has_value())
date_time_format.set_calendar(result.ca.release_value());
// 21. Set dateTimeFormat.[[HourCycle]] to r.[[hc]].
if (result.hc.has_value())
date_time_format.set_hour_cycle(result.hc.release_value());
// 22. Set dateTimeFormat.[[NumberingSystem]] to r.[[nu]].
if (result.nu.has_value())
date_time_format.set_numbering_system(result.nu.release_value());
// 23. Let dataLocale be r.[[dataLocale]].
auto data_locale = move(result.data_locale);
// Non-standard, the data locale is needed for LibUnicode lookups while formatting.
date_time_format.set_data_locale(data_locale);
// 24. Let timeZone be ? Get(options, "timeZone").
auto time_zone_value = TRY(options->get(vm.names.timeZone));
String time_zone;
// 25. If timeZone is undefined, then
if (time_zone_value.is_undefined()) {
// a. Let timeZone be DefaultTimeZone().
time_zone = Temporal::default_time_zone();
}
// 26. Else,
else {
// a. Let timeZone be ? ToString(timeZone).
time_zone = TRY(time_zone_value.to_string(global_object));
// b. If the result of IsValidTimeZoneName(timeZone) is false, then
if (!Temporal::is_valid_time_zone_name(time_zone)) {
// i. Throw a RangeError exception.
return vm.throw_completion<RangeError>(global_object, ErrorType::OptionIsNotValidValue, time_zone, vm.names.timeZone);
}
// c. Let timeZone be CanonicalizeTimeZoneName(timeZone).
time_zone = Temporal::canonicalize_time_zone_name(time_zone);
}
// 27. Set dateTimeFormat.[[TimeZone]] to timeZone.
date_time_format.set_time_zone(move(time_zone));
// 28. Let formatOptions be a new Record.
Unicode::CalendarPattern format_options {};
// 29. For each row of Table 4, except the header row, in table order, do
TRY(for_each_calendar_field(global_object, format_options, [&](auto& option, auto const& property, auto const& defaults) -> ThrowCompletionOr<void> {
using ValueType = typename RemoveReference<decltype(option)>::ValueType;
// a. Let prop be the name given in the Property column of the row.
// b. If prop is "fractionalSecondDigits", then
if constexpr (IsIntegral<ValueType>) {
// i. Let value be ? GetNumberOption(options, "fractionalSecondDigits", 1, 3, undefined).
auto value = TRY(get_number_option(global_object, *options, property, 1, 3, {}));
// d. Set formatOptions.[[<prop>]] to value.
if (value.has_value())
option = static_cast<ValueType>(value.value());
}
// c. Else,
else {
// i. Let value be ? GetOption(options, prop, "string", « the strings given in the Values column of the row », undefined).
auto value = TRY(get_option(global_object, *options, property, Value::Type::String, defaults, Empty {}));
// d. Set formatOptions.[[<prop>]] to value.
if (!value.is_undefined())
option = Unicode::calendar_pattern_style_from_string(value.as_string().string());
}
return {};
}));
// 30. Let dataLocaleData be localeData.[[<dataLocale>]].
// 31. Let hcDefault be dataLocaleData.[[hourCycle]].
auto default_hour_cycle = Unicode::get_default_regional_hour_cycle(data_locale);
// Non-standard, default_hour_cycle will be empty if Unicode data generation is disabled.
if (!default_hour_cycle.has_value())
return &date_time_format;
// 32. Let hc be dateTimeFormat.[[HourCycle]].
// 33. If hc is null, then
// a. Set hc to hcDefault.
auto hour_cycle_value = date_time_format.has_hour_cycle() ? date_time_format.hour_cycle() : *default_hour_cycle;
// 34. If hour12 is true, then
if (hour12.is_boolean() && hour12.as_bool()) {
// a. If hcDefault is "h11" or "h23", then
if ((default_hour_cycle == Unicode::HourCycle::H11) || (default_hour_cycle == Unicode::HourCycle::H23)) {
// i. Set hc to "h11".
hour_cycle_value = Unicode::HourCycle::H11;
}
// b. Else,
else {
// i. Set hc to "h12".
hour_cycle_value = Unicode::HourCycle::H12;
}
}
// 35. Else if hour12 is false, then
else if (hour12.is_boolean() && !hour12.as_bool()) {
// a. If hcDefault is "h11" or "h23", then
if ((default_hour_cycle == Unicode::HourCycle::H11) || (default_hour_cycle == Unicode::HourCycle::H23)) {
// i. Set hc to "h23".
hour_cycle_value = Unicode::HourCycle::H23;
}
// b. Else,
else {
// i. Set hc to "h24".
hour_cycle_value = Unicode::HourCycle::H24;
}
}
// 36. Else,
else {
// a. Assert: hour12 is undefined.
VERIFY(hour12.is_undefined());
}
// 37. Set dateTimeFormat.[[HourCycle]] to hc.
date_time_format.set_hour_cycle(hour_cycle_value);
// 38. Set formatOptions.[[hourCycle]] to hc.
format_options.hour_cycle = hour_cycle_value;
// 39. Let matcher be ? GetOption(options, "formatMatcher", "string", « "basic", "best fit" », "best fit").
matcher = TRY(get_option(global_object, *options, vm.names.formatMatcher, Value::Type::String, AK::Array { "basic"sv, "best fit"sv }, "best fit"sv));
// 40. Let dateStyle be ? GetOption(options, "dateStyle", "string", « "full", "long", "medium", "short" », undefined).
auto date_style = TRY(get_option(global_object, *options, vm.names.dateStyle, Value::Type::String, AK::Array { "full"sv, "long"sv, "medium"sv, "short"sv }, Empty {}));
// 41. Set dateTimeFormat.[[DateStyle]] to dateStyle.
if (!date_style.is_undefined())
date_time_format.set_date_style(date_style.as_string().string());
// 42. Let timeStyle be ? GetOption(options, "timeStyle", "string", « "full", "long", "medium", "short" », undefined).
auto time_style = TRY(get_option(global_object, *options, vm.names.timeStyle, Value::Type::String, AK::Array { "full"sv, "long"sv, "medium"sv, "short"sv }, Empty {}));
// 43. Set dateTimeFormat.[[TimeStyle]] to timeStyle.
if (!time_style.is_undefined())
date_time_format.set_time_style(time_style.as_string().string());
Optional<Unicode::CalendarPattern> best_format {};
// 44. If dateStyle is not undefined or timeStyle is not undefined, then
if (date_time_format.has_date_style() || date_time_format.has_time_style()) {
// a. For each row in Table 4, except the header row, do
TRY(for_each_calendar_field(global_object, format_options, [&](auto const& option, auto const& property, auto const&) -> ThrowCompletionOr<void> {
// i. Let prop be the name given in the Property column of the row.
// ii. Let p be formatOptions.[[<prop>]].
// iii. If p is not undefined, then
if (option.has_value()) {
// 1. Throw a TypeError exception.
return vm.throw_completion<TypeError>(global_object, ErrorType::IntlInvalidDateTimeFormatOption, property, "dateStyle or timeStyle"sv);
}
return {};
}));
// b. Let styles be dataLocaleData.[[styles]].[[<calendar>]].
// c. Let bestFormat be DateTimeStyleFormat(dateStyle, timeStyle, styles).
best_format = date_time_style_format(data_locale, date_time_format);
}
// 45. Else,
else {
// a. Let formats be dataLocaleData.[[formats]].[[<calendar>]].
auto formats = Unicode::get_calendar_available_formats(data_locale, date_time_format.calendar());
// b. If matcher is "basic", then
if (matcher.as_string().string() == "basic"sv) {
// i. Let bestFormat be BasicFormatMatcher(formatOptions, formats).
best_format = basic_format_matcher(format_options, move(formats));
}
// c. Else,
else {
// i. Let bestFormat be BestFitFormatMatcher(formatOptions, formats).
best_format = best_fit_format_matcher(format_options, move(formats));
}
}
// 46. For each row in Table 4, except the header row, in table order, do
date_time_format.for_each_calendar_field_zipped_with(*best_format, [&](auto& date_time_format_field, auto const& best_format_field, auto) {
// a. Let prop be the name given in the Property column of the row.
// b. If bestFormat has a field [[<prop>]], then
if (best_format_field.has_value()) {
// i. Let p be bestFormat.[[<prop>]].
// ii. Set dateTimeFormat's internal slot whose name is the Internal Slot column of the row to p.
date_time_format_field = best_format_field;
}
});
String pattern;
Vector<Unicode::CalendarRangePattern> range_patterns;
// 47. If dateTimeFormat.[[Hour]] is undefined, then
if (!date_time_format.has_hour()) {
// a. Set dateTimeFormat.[[HourCycle]] to undefined.
date_time_format.clear_hour_cycle();
}
// 48. If dateTimeformat.[[HourCycle]] is "h11" or "h12", then
if ((hour_cycle_value == Unicode::HourCycle::H11) || (hour_cycle_value == Unicode::HourCycle::H12)) {
// a. Let pattern be bestFormat.[[pattern12]].
if (best_format->pattern12.has_value()) {
pattern = best_format->pattern12.release_value();
} else {
// Non-standard, LibUnicode only provides [[pattern12]] when [[pattern]] has a day
// period. Other implementations provide [[pattern12]] as a copy of [[pattern]].
pattern = move(best_format->pattern);
}
// b. Let rangePatterns be bestFormat.[[rangePatterns12]].
range_patterns = Unicode::get_calendar_range12_formats(data_locale, date_time_format.calendar(), best_format->skeleton);
}
// 49. Else,
else {
// a. Let pattern be bestFormat.[[pattern]].
pattern = move(best_format->pattern);
// b. Let rangePatterns be bestFormat.[[rangePatterns]].
range_patterns = Unicode::get_calendar_range_formats(data_locale, date_time_format.calendar(), best_format->skeleton);
}
// 50. Set dateTimeFormat.[[Pattern]] to pattern.
date_time_format.set_pattern(move(pattern));
// 51. Set dateTimeFormat.[[RangePatterns]] to rangePatterns.
date_time_format.set_range_patterns(move(range_patterns));
// 52. Return dateTimeFormat.
return &date_time_format;
}
// 11.1.2 ToDateTimeOptions ( options, required, defaults ), https://tc39.es/ecma402/#sec-todatetimeoptions
// 11.5.1 ToDateTimeOptions ( options, required, defaults ), https://tc39.es/ecma402/#sec-todatetimeoptions
ThrowCompletionOr<Object*> to_date_time_options(GlobalObject& global_object, Value options_value, OptionRequired required, OptionDefaults defaults)
{
auto& vm = global_object.vm();
@ -455,7 +148,7 @@ ThrowCompletionOr<Object*> to_date_time_options(GlobalObject& global_object, Val
return options;
}
// 11.1.3 DateTimeStyleFormat ( dateStyle, timeStyle, styles ), https://tc39.es/ecma402/#sec-date-time-style-format
// 11.5.2 DateTimeStyleFormat ( dateStyle, timeStyle, styles ), https://tc39.es/ecma402/#sec-date-time-style-format
Optional<Unicode::CalendarPattern> date_time_style_format(StringView data_locale, DateTimeFormat& date_time_format)
{
Unicode::CalendarPattern time_format {};
@ -560,7 +253,7 @@ Optional<Unicode::CalendarPattern> date_time_style_format(StringView data_locale
return date_format;
}
// 11.1.4 BasicFormatMatcher ( options, formats ), https://tc39.es/ecma402/#sec-basicformatmatcher
// 11.5.3 BasicFormatMatcher ( options, formats ), https://tc39.es/ecma402/#sec-basicformatmatcher
Optional<Unicode::CalendarPattern> basic_format_matcher(Unicode::CalendarPattern const& options, Vector<Unicode::CalendarPattern> formats)
{
// 1. Let removalPenalty be 120.
@ -596,7 +289,7 @@ Optional<Unicode::CalendarPattern> basic_format_matcher(Unicode::CalendarPattern
// a. Let score be 0.
int score = 0;
// b. For each property name property shown in Table 4, do
// b. For each property name property shown in Table 6, do
format.for_each_calendar_field_zipped_with(options, [&](auto const& format_prop, auto const& options_prop, auto type) {
using ValueType = typename RemoveReference<decltype(options_prop)>::ValueType;
@ -757,7 +450,7 @@ Optional<Unicode::CalendarPattern> basic_format_matcher(Unicode::CalendarPattern
return best_format;
}
// 11.1.5 BestFitFormatMatcher ( options, formats ), https://tc39.es/ecma402/#sec-bestfitformatmatcher
// 11.5.4 BestFitFormatMatcher ( options, formats ), https://tc39.es/ecma402/#sec-bestfitformatmatcher
Optional<Unicode::CalendarPattern> best_fit_format_matcher(Unicode::CalendarPattern const& options, Vector<Unicode::CalendarPattern> formats)
{
// When the BestFitFormatMatcher abstract operation is called with two arguments options and formats, it performs
@ -810,7 +503,7 @@ static Optional<StyleAndValue> find_calendar_field(StringView name, Unicode::Cal
return {};
}
// 11.1.7 FormatDateTimePattern ( dateTimeFormat, patternParts, x, rangeFormatOptions ), https://tc39.es/ecma402/#sec-formatdatetimepattern
// 11.5.6 FormatDateTimePattern ( dateTimeFormat, patternParts, x, rangeFormatOptions ), https://tc39.es/ecma402/#sec-formatdatetimepattern
ThrowCompletionOr<Vector<PatternPartition>> format_date_time_pattern(GlobalObject& global_object, DateTimeFormat& date_time_format, Vector<PatternPartition> pattern_parts, Value time, Unicode::CalendarPattern const* range_format_options)
{
auto& vm = global_object.vm();
@ -938,7 +631,7 @@ ThrowCompletionOr<Vector<PatternPartition>> format_date_time_pattern(GlobalObjec
result.append({ "timeZoneName"sv, move(formatted_value) });
}
// f. Else if p matches a Property column of the row in Table 4, then
// f. Else if p matches a Property column of the row in Table 6, then
else if (auto style_and_value = find_calendar_field(part, date_time_format, range_format_options, local_time); style_and_value.has_value()) {
String formatted_value;
@ -1094,7 +787,7 @@ ThrowCompletionOr<Vector<PatternPartition>> format_date_time_pattern(GlobalObjec
return result;
}
// 11.1.8 PartitionDateTimePattern ( dateTimeFormat, x ), https://tc39.es/ecma402/#sec-partitiondatetimepattern
// 11.5.7 PartitionDateTimePattern ( dateTimeFormat, x ), https://tc39.es/ecma402/#sec-partitiondatetimepattern
ThrowCompletionOr<Vector<PatternPartition>> partition_date_time_pattern(GlobalObject& global_object, DateTimeFormat& date_time_format, Value time)
{
// 1. Let patternParts be PartitionPattern(dateTimeFormat.[[Pattern]]).
@ -1107,7 +800,7 @@ ThrowCompletionOr<Vector<PatternPartition>> partition_date_time_pattern(GlobalOb
return result;
}
// 11.1.9 FormatDateTime ( dateTimeFormat, x ), https://tc39.es/ecma402/#sec-formatdatetime
// 11.5.8 FormatDateTime ( dateTimeFormat, x ), https://tc39.es/ecma402/#sec-formatdatetime
ThrowCompletionOr<String> format_date_time(GlobalObject& global_object, DateTimeFormat& date_time_format, Value time)
{
// 1. Let parts be ? PartitionDateTimePattern(dateTimeFormat, x).
@ -1126,7 +819,7 @@ ThrowCompletionOr<String> format_date_time(GlobalObject& global_object, DateTime
return result.build();
}
// 11.1.10 FormatDateTimeToParts ( dateTimeFormat, x ), https://tc39.es/ecma402/#sec-formatdatetimetoparts
// 11.5.9 FormatDateTimeToParts ( dateTimeFormat, x ), https://tc39.es/ecma402/#sec-formatdatetimetoparts
ThrowCompletionOr<Array*> format_date_time_to_parts(GlobalObject& global_object, DateTimeFormat& date_time_format, Value time)
{
auto& vm = global_object.vm();
@ -1165,7 +858,7 @@ ThrowCompletionOr<Array*> format_date_time_to_parts(GlobalObject& global_object,
template<typename Callback>
void for_each_range_pattern_field(LocalTime const& time1, LocalTime const& time2, Callback&& callback)
{
// Table 6: Range pattern fields, https://tc39.es/ecma402/#table-datetimeformat-rangepatternfields
// Table 4: Range pattern fields, https://tc39.es/ecma402/#table-datetimeformat-rangepatternfields
if (callback(static_cast<u8>(time1.era), static_cast<u8>(time2.era), Unicode::CalendarRangePattern::Field::Era) == IterationDecision::Break)
return;
if (callback(time1.year, time2.year, Unicode::CalendarRangePattern::Field::Year) == IterationDecision::Break)
@ -1197,7 +890,7 @@ ThrowCompletionOr<void> for_each_range_pattern_with_source(Unicode::CalendarRang
return {};
}
// 11.1.11 PartitionDateTimeRangePattern ( dateTimeFormat, x, y ), https://tc39.es/ecma402/#sec-partitiondatetimerangepattern
// 11.5.10 PartitionDateTimeRangePattern ( dateTimeFormat, x, y ), https://tc39.es/ecma402/#sec-partitiondatetimerangepattern
ThrowCompletionOr<Vector<PatternPartitionWithSource>> partition_date_time_range_pattern(GlobalObject& global_object, DateTimeFormat& date_time_format, Value start, Value end)
{
auto& vm = global_object.vm();
@ -1238,7 +931,7 @@ ThrowCompletionOr<Vector<PatternPartitionWithSource>> partition_date_time_range_
// 11. Let patternContainsLargerDateField be false.
bool pattern_contains_larger_date_field = false;
// 12. While dateFieldsPracticallyEqual is true and patternContainsLargerDateField is false, repeat for each row of Table 6 in order, except the header row:
// 12. While dateFieldsPracticallyEqual is true and patternContainsLargerDateField is false, repeat for each row of Table 4 in order, except the header row:
for_each_range_pattern_field(start_local_time, end_local_time, [&](auto start_value, auto end_value, auto field_name) {
// a. Let fieldName be the name given in the Range Pattern Field column of the row.
@ -1427,7 +1120,7 @@ ThrowCompletionOr<Vector<PatternPartitionWithSource>> partition_date_time_range_
return result;
}
// 11.1.12 FormatDateTimeRange ( dateTimeFormat, x, y ), https://tc39.es/ecma402/#sec-formatdatetimerange
// 11.5.11 FormatDateTimeRange ( dateTimeFormat, x, y ), https://tc39.es/ecma402/#sec-formatdatetimerange
ThrowCompletionOr<String> format_date_time_range(GlobalObject& global_object, DateTimeFormat& date_time_format, Value start, Value end)
{
// 1. Let parts be ? PartitionDateTimeRangePattern(dateTimeFormat, x, y).
@ -1446,7 +1139,7 @@ ThrowCompletionOr<String> format_date_time_range(GlobalObject& global_object, Da
return result.build();
}
// 11.1.13 FormatDateTimeRangeToParts ( dateTimeFormat, x, y ), https://tc39.es/ecma402/#sec-formatdatetimerangetoparts
// 11.5.12 FormatDateTimeRangeToParts ( dateTimeFormat, x, y ), https://tc39.es/ecma402/#sec-formatdatetimerangetoparts
ThrowCompletionOr<Array*> format_date_time_range_to_parts(GlobalObject& global_object, DateTimeFormat& date_time_format, Value start, Value end)
{
auto& vm = global_object.vm();
@ -1485,7 +1178,7 @@ ThrowCompletionOr<Array*> format_date_time_range_to_parts(GlobalObject& global_o
return result;
}
// 11.1.14 ToLocalTime ( t, calendar, timeZone ), https://tc39.es/ecma402/#sec-tolocaltime
// 11.5.13 ToLocalTime ( t, calendar, timeZone ), https://tc39.es/ecma402/#sec-tolocaltime
ThrowCompletionOr<LocalTime> to_local_time(GlobalObject& global_object, double time, StringView calendar, StringView time_zone)
{
// 1. Assert: Type(t) is Number.
@ -1500,7 +1193,7 @@ ThrowCompletionOr<LocalTime> to_local_time(GlobalObject& global_object, double t
auto year = year_from_time(zoned_time);
// c. Return a record with fields calculated from tz according to Table 5.
// c. Return a record with fields calculated from tz according to Table 7.
return LocalTime {
// WeekDay(tz) specified in es2022's Week Day.
.weekday = week_day(zoned_time),
@ -1528,7 +1221,7 @@ ThrowCompletionOr<LocalTime> to_local_time(GlobalObject& global_object, double t
}
// 3. Else,
// a. Return a record with the fields of Column 1 of Table 5 calculated from t for the given calendar and timeZone. The calculations should use best available information about the specified calendar and timeZone, including current and historical information about time zone offsets from UTC and daylight saving time rules.
// a. Return a record with the fields of Column 1 of Table 7 calculated from t for the given calendar and timeZone. The calculations should use best available information about the specified calendar and timeZone, including current and historical information about time zone offsets from UTC and daylight saving time rules.
// FIXME: Implement this when non-Gregorian calendars are supported by LibUnicode.
return global_object.vm().throw_completion<InternalError>(global_object, ErrorType::NotImplemented, "Non-Gregorian calendars"sv);
}