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LibJS: Implement Temporal.Calendar.prototype.fields()
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@ -5,6 +5,7 @@
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*/
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#include <AK/TypeCasts.h>
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#include <LibJS/Runtime/Array.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/Temporal/AbstractOperations.h>
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#include <LibJS/Runtime/Temporal/Calendar.h>
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@ -47,6 +48,7 @@ void CalendarPrototype::initialize(GlobalObject& global_object)
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define_native_function(vm.names.daysInYear, days_in_year, 1, attr);
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define_native_function(vm.names.monthsInYear, months_in_year, 1, attr);
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define_native_function(vm.names.inLeapYear, in_leap_year, 1, attr);
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define_native_function(vm.names.fields, fields, 1, attr);
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define_native_function(vm.names.toString, to_string, 0, attr);
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define_native_function(vm.names.toJSON, to_json, 0, attr);
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}
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@ -446,6 +448,30 @@ JS_DEFINE_NATIVE_FUNCTION(CalendarPrototype::in_leap_year)
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return Value(is_iso_leap_year(iso_year(temporal_date_like.as_object())));
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}
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// 12.4.21 Temporal.Calendar.prototype.fields ( fields ), https://tc39.es/proposal-temporal/#sec-temporal.calendar.prototype.fields
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// NOTE: This is the minimum fields implementation for engines without ECMA-402.
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JS_DEFINE_NATIVE_FUNCTION(CalendarPrototype::fields)
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{
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auto fields = vm.argument(0);
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// 1. Let calendar be the this value.
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// 2. Perform ? RequireInternalSlot(calendar, [[InitializedTemporalCalendar]]).
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auto* calendar = typed_this(global_object);
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if (vm.exception())
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return {};
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// 3. Assert: calendar.[[Identifier]] is "iso8601".
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VERIFY(calendar->identifier() == "iso8601"sv);
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// 4. Let fieldNames be ? IterableToListOfType(fields, « String »).
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auto field_names = iterable_to_list_of_type(global_object, fields, { OptionType::String });
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if (vm.exception())
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return {};
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// 5. Return ! CreateArrayFromList(fieldNames).
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return Array::create_from(global_object, field_names);
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}
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// 12.4.23 Temporal.Calendar.prototype.toString ( ), https://tc39.es/proposal-temporal/#sec-temporal.calendar.prototype.tostring
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JS_DEFINE_NATIVE_FUNCTION(CalendarPrototype::to_string)
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{
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@ -34,6 +34,7 @@ private:
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JS_DECLARE_NATIVE_FUNCTION(days_in_year);
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JS_DECLARE_NATIVE_FUNCTION(months_in_year);
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JS_DECLARE_NATIVE_FUNCTION(in_leap_year);
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JS_DECLARE_NATIVE_FUNCTION(fields);
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JS_DECLARE_NATIVE_FUNCTION(to_string);
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JS_DECLARE_NATIVE_FUNCTION(to_json);
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};
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