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LibJS: Implement ToTemporalMonthDay AO
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parent
de0791b0a1
commit
d9d1e25db3
Notes:
sideshowbarker
2024-07-18 04:19:18 +09:00
Author: https://github.com/Lubrsi Commit: https://github.com/SerenityOS/serenity/commit/d9d1e25db3e Pull-request: https://github.com/SerenityOS/serenity/pull/9926 Reviewed-by: https://github.com/linusg ✅
2 changed files with 110 additions and 0 deletions
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@ -1,5 +1,6 @@
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/*
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* Copyright (c) 2021, Linus Groh <linusg@serenityos.org>
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* Copyright (c) 2021, Luke Wilde <lukew@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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@ -8,8 +9,11 @@
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/Temporal/Calendar.h>
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#include <LibJS/Runtime/Temporal/PlainDate.h>
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#include <LibJS/Runtime/Temporal/PlainDateTime.h>
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#include <LibJS/Runtime/Temporal/PlainMonthDay.h>
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#include <LibJS/Runtime/Temporal/PlainMonthDayConstructor.h>
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#include <LibJS/Runtime/Temporal/PlainTime.h>
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#include <LibJS/Runtime/Temporal/ZonedDateTime.h>
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namespace JS::Temporal {
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@ -29,6 +33,111 @@ void PlainMonthDay::visit_edges(Visitor& visitor)
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visitor.visit(&m_calendar);
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}
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// 10.5.1 ToTemporalMonthDay ( item [ , options ] ), https://tc39.es/proposal-temporal/#sec-temporal-totemporalmonthday
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PlainMonthDay* to_temporal_month_day(GlobalObject& global_object, Value item, Object const* options)
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{
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auto& vm = global_object.vm();
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// 1. If options is not present, set options to ! OrdinaryObjectCreate(null).
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if (!options)
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options = Object::create(global_object, nullptr);
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// 2. Let referenceISOYear be 1972 (the first leap year after the Unix epoch).
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i32 reference_iso_year = 1972;
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// 3. If Type(item) is Object, then
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if (item.is_object()) {
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auto& item_object = item.as_object();
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// a. If item has an [[InitializedTemporalMonthDay]] internal slot, then
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if (is<PlainMonthDay>(item_object)) {
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// i. Return item.
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return static_cast<PlainMonthDay*>(&item_object);
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}
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Object* calendar = nullptr;
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bool calendar_absent;
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// b. If item has an [[InitializedTemporalDate]], [[InitializedTemporalDateTime]], [[InitializedTemporalTime]], [[InitializedTemporalYearMonth]], or [[InitializedTemporalZonedDateTime]] internal slot, then
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// i. Let calendar be item.[[Calendar]].
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// ii. Let calendarAbsent be false.
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if (is<PlainDate>(item_object)) {
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calendar = &static_cast<PlainDate&>(item_object).calendar();
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calendar_absent = false;
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} else if (is<PlainDateTime>(item_object)) {
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calendar = &static_cast<PlainDateTime&>(item_object).calendar();
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calendar_absent = false;
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} else if (is<PlainMonthDay>(item_object)) {
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calendar = &static_cast<PlainMonthDay&>(item_object).calendar();
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calendar_absent = false;
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} else if (is<PlainTime>(item_object)) {
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calendar = &static_cast<PlainTime&>(item_object).calendar();
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calendar_absent = false;
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} else if (is<PlainYearMonth>(item_object)) {
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calendar = &static_cast<PlainYearMonth&>(item_object).calendar();
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calendar_absent = false;
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} else if (is<ZonedDateTime>(item_object)) {
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calendar = &static_cast<ZonedDateTime&>(item_object).calendar();
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calendar_absent = false;
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} else {
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// i. Let calendar be ? Get(item, "calendar").
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auto calendar_value = item_object.get(vm.names.calendar);
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if (vm.exception())
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return {};
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// ii. If calendar is undefined, then
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// 1. Let calendarAbsent be true.
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// iii. Else,
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// 1. Let calendarAbsent be false.
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calendar_absent = calendar_value.is_undefined();
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// iv. Set calendar to ? ToTemporalCalendarWithISODefault(calendar).
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calendar = to_temporal_calendar_with_iso_default(global_object, calendar_value);
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if (vm.exception())
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return {};
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}
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// d. Let fieldNames be ? CalendarFields(calendar, « "day", "month", "monthCode", "year" »).
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auto field_names = calendar_fields(global_object, *calendar, { "day"sv, "month"sv, "monthCode"sv, "year"sv });
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if (vm.exception())
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return {};
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// e. Let fields be ? PrepareTemporalFields(item, fieldNames, «»).
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auto* fields = prepare_temporal_fields(global_object, item_object, field_names, {});
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if (vm.exception())
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return {};
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// f. Let month be ? Get(fields, "month").
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auto month = fields->get(vm.names.month);
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if (vm.exception())
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return {};
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// g. Let monthCode be ? Get(fields, "monthCode").
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auto month_code = fields->get(vm.names.monthCode);
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if (vm.exception())
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return {};
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// h. Let year be ? Get(fields, "year").
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auto year = fields->get(vm.names.year);
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if (vm.exception())
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return {};
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// i. If calendarAbsent is true, and month is not undefined, and monthCode is undefined and year is undefined, then
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if (calendar_absent && !month.is_undefined() && month_code.is_undefined() && year.is_undefined()) {
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// i. Perform ! CreateDataPropertyOrThrow(fields, "year", 𝔽(referenceISOYear)).
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fields->create_data_property_or_throw(vm.names.year, Value(reference_iso_year));
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}
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// j. Return ? MonthDayFromFields(calendar, fields, options).
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return month_day_from_fields(global_object, *calendar, *fields, options);
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}
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// FIXME: The spec has an issue in this part which makes it unimplementable, namely:
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// - ParseTemporalMonthDayString doesn't return a [[Calendar]] field, which is required in step 7.
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// This is a known issue, see https://github.com/tc39/proposal-temporal/issues/1502
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TODO();
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}
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// 10.5.2 CreateTemporalMonthDay ( isoMonth, isoDay, calendar, referenceISOYear [ , newTarget ] ), https://tc39.es/proposal-temporal/#sec-temporal-createtemporalmonthday
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PlainMonthDay* create_temporal_month_day(GlobalObject& global_object, u8 iso_month, u8 iso_day, Object& calendar, i32 reference_iso_year, FunctionObject const* new_target)
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{
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@ -39,6 +39,7 @@ struct ISOMonthDay {
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i32 reference_iso_year;
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};
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PlainMonthDay* to_temporal_month_day(GlobalObject&, Value item, Object const* options = nullptr);
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PlainMonthDay* create_temporal_month_day(GlobalObject&, u8 iso_month, u8 iso_day, Object& calendar, i32 reference_iso_year, FunctionObject const* new_target = nullptr);
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Optional<String> temporal_month_day_to_string(GlobalObject&, PlainMonthDay&, StringView show_calendar);
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