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LibJS: Implement Temporal.Calendar.prototype.monthsInYear

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Idan Horowitz 2021-07-23 18:52:55 +03:00 • committed by Linus Groh
parent b1dd09840b
commit 342172da37
4 changed files with 41 additions and 0 deletions
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28
Userland/Libraries/LibJS/Runtime/Temporal/CalendarPrototype.cpp
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@ -41,6 +41,7 @@ void CalendarPrototype::initialize(GlobalObject& global_object)
define_native_function(vm.names.daysInWeek, days_in_week, 1, attr);
define_native_function(vm.names.daysInMonth, days_in_month, 1, attr);
define_native_function(vm.names.daysInYear, days_in_year, 1, attr);
define_native_function(vm.names.monthsInYear, months_in_year, 1, attr);
define_native_function(vm.names.toString, to_string, 0, attr);
define_native_function(vm.names.toJSON, to_json, 0, attr);
}
@ -357,6 +358,33 @@ JS_DEFINE_NATIVE_FUNCTION(CalendarPrototype::days_in_year)
return Value(iso_days_in_year(iso_year(temporal_date_like.as_object())));
}
// 12.4.19 Temporal.Calendar.prototype.monthsInYear ( temporalDateLike ), https://tc39.es/proposal-temporal/#sec-temporal.calendar.prototype.monthsinyear
// NOTE: This is the minimum monthsInYear implementation for engines without ECMA-402.
JS_DEFINE_NATIVE_FUNCTION(CalendarPrototype::months_in_year)
{
// 1. Let calendar be the this value.
// 2. Perform ? RequireInternalSlot(calendar, [[InitializedTemporalCalendar]]).
auto* calendar = typed_this(global_object);
if (vm.exception())
return {};
// 3. Assert: calendar.[[Identifier]] is "iso8601".
VERIFY(calendar->identifier() == "iso8601"sv);
auto temporal_date_like = vm.argument(0);
// 4. If Type(temporalDateLike) is not Object or temporalDateLike does not have an [[InitializedTemporalDate]] or [[InitializedTemporalYearMonth]] internal slot, then
// TODO PlainYearMonth objects
if (!temporal_date_like.is_object() || !is<PlainDate>(temporal_date_like.as_object())) {
// a. Perform ? ToTemporalDate(temporalDateLike).
(void)to_temporal_date(global_object, temporal_date_like);
if (vm.exception())
return {};
}
// 5. Return 12𝔽.
return Value(12);
}
// 12.4.23 Temporal.Calendar.prototype.toString ( ), https://tc39.es/proposal-temporal/#sec-temporal.calendar.prototype.tostring
JS_DEFINE_NATIVE_FUNCTION(CalendarPrototype::to_string)
{

1
Userland/Libraries/LibJS/Runtime/Temporal/CalendarPrototype.h
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@ -31,6 +31,7 @@ private:
JS_DECLARE_NATIVE_FUNCTION(days_in_week);
JS_DECLARE_NATIVE_FUNCTION(days_in_month);
JS_DECLARE_NATIVE_FUNCTION(days_in_year);
JS_DECLARE_NATIVE_FUNCTION(months_in_year);
JS_DECLARE_NATIVE_FUNCTION(to_string);
JS_DECLARE_NATIVE_FUNCTION(to_json);
};