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LibJS: Implement Temporal.ZonedDateTime.prototype.nanosecond
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sideshowbarker
2024-07-18 07:27:45 +09:00
Author: https://github.com/linusg Commit: https://github.com/SerenityOS/serenity/commit/a1082412ef1 Pull-request: https://github.com/SerenityOS/serenity/pull/9213 Reviewed-by: https://github.com/IdanHo ✅
@ -41,6 +41,7 @@ void ZonedDateTimePrototype::initialize(GlobalObject& global_object)
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define_native_accessor(vm.names.second, second_getter, {}, Attribute::Configurable);
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define_native_accessor(vm.names.millisecond, millisecond_getter, {}, Attribute::Configurable);
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define_native_accessor(vm.names.microsecond, microsecond_getter, {}, Attribute::Configurable);
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define_native_accessor(vm.names.nanosecond, nanosecond_getter, {}, Attribute::Configurable);
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}
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static ZonedDateTime* typed_this(GlobalObject& global_object)
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@ -325,4 +326,31 @@ JS_DEFINE_NATIVE_FUNCTION(ZonedDateTimePrototype::microsecond_getter)
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return Value(temporal_date_time->iso_microsecond());
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}
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// 6.3.14 get Temporal.ZonedDateTime.prototype.nanosecond, https://tc39.es/proposal-temporal/#sec-get-temporal.zoneddatetime.prototype.nanosecond
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JS_DEFINE_NATIVE_FUNCTION(ZonedDateTimePrototype::nanosecond_getter)
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{
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// 1. Let zonedDateTime be the this value.
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// 2. Perform ? RequireInternalSlot(zonedDateTime, [[InitializedTemporalZonedDateTime]]).
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auto* zoned_date_time = typed_this(global_object);
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if (vm.exception())
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return {};
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// 3. Let timeZone be zonedDateTime.[[TimeZone]].
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auto& time_zone = zoned_date_time->time_zone();
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// 4. Let instant be ! CreateTemporalInstant(zonedDateTime.[[Nanoseconds]]).
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auto* instant = create_temporal_instant(global_object, zoned_date_time->nanoseconds());
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// 5. Let calendar be zonedDateTime.[[Calendar]].
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auto& calendar = zoned_date_time->calendar();
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// 6. Let temporalDateTime be ? BuiltinTimeZoneGetPlainDateTimeFor(timeZone, instant, calendar).
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auto* temporal_date_time = builtin_time_zone_get_plain_date_time_for(global_object, &time_zone, *instant, calendar);
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if (vm.exception())
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return {};
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// 7. Return 𝔽(temporalDateTime.[[ISONanosecond]]).
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return Value(temporal_date_time->iso_nanosecond());
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}
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}
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@ -30,6 +30,7 @@ private:
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JS_DECLARE_NATIVE_FUNCTION(second_getter);
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JS_DECLARE_NATIVE_FUNCTION(millisecond_getter);
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JS_DECLARE_NATIVE_FUNCTION(microsecond_getter);
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JS_DECLARE_NATIVE_FUNCTION(nanosecond_getter);
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};
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}
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@ -0,0 +1,15 @@
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describe("correct behavior", () => {
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test("basic functionality", () => {
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const timeZone = new Temporal.TimeZone("UTC");
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const zonedDateTime = new Temporal.ZonedDateTime(123n, timeZone);
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expect(zonedDateTime.nanosecond).toBe(123);
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});
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});
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test("errors", () => {
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test("this value must be a Temporal.ZonedDateTime object", () => {
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expect(() => {
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Reflect.get(Temporal.ZonedDateTime.prototype, "nanosecond", "foo");
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}).toThrowWithMessage(TypeError, "Not a Temporal.ZonedDateTime");
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});
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});
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