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LibJS: Implement Temporal.PlainYearMonth.prototype.toString()
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@ -7,6 +7,7 @@
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#include <LibJS/Runtime/AbstractOperations.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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#include <LibJS/Runtime/Temporal/PlainDate.h>
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#include <LibJS/Runtime/Temporal/PlainYearMonth.h>
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#include <LibJS/Runtime/Temporal/PlainYearMonthConstructor.h>
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@ -186,4 +187,37 @@ PlainYearMonth* create_temporal_year_month(GlobalObject& global_object, i32 iso_
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return object;
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}
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// 9.5.8 TemporalYearMonthToString ( yearMonth, showCalendar ), https://tc39.es/proposal-temporal/#sec-temporal-temporalyearmonthtostring
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Optional<String> temporal_year_month_to_string(GlobalObject& global_object, PlainYearMonth& year_month, StringView show_calendar)
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{
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auto& vm = global_object.vm();
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// 1. Assert: Type(yearMonth) is Object.
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// 2. Assert: yearMonth has an [[InitializedTemporalYearMonth]] internal slot.
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// 3. Let year be ! PadISOYear(yearMonth.[[ISOYear]]).
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// 4. Let month be yearMonth.[[ISOMonth]] formatted as a two-digit decimal number, padded to the left with a zero if necessary.
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// 5. Let result be the string-concatenation of year, the code unit 0x002D (HYPHEN-MINUS), and month.
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auto result = String::formatted("{}-{:02}", pad_iso_year(year_month.iso_year()), year_month.iso_month());
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// 6. Let calendarID be ? ToString(yearMonth.[[Calendar]]).
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auto calendar_id = Value(&year_month.calendar()).to_string(global_object);
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if (vm.exception())
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return {};
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// 7. If calendarID is not "iso8601", then
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if (calendar_id != "iso8601") {
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// a. Let day be yearMonth.[[ISODay]] formatted as a two-digit decimal number, padded to the left with a zero if necessary.
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// b. Set result to the string-concatenation of result, the code unit 0x002D (HYPHEN-MINUS), and day.
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result = String::formatted("{}-{:02}", result, year_month.iso_day());
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}
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// 8. Let calendarString be ! FormatCalendarAnnotation(calendarID, showCalendar).
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auto calendar_string = format_calendar_annotation(calendar_id, show_calendar);
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// 9. Set result to the string-concatenation of result and calendarString.
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// 10. Return result.
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return String::formatted("{}{}", result, calendar_string);
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}
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}
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