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LibJS: Implement Temporal.PlainYearMonth.prototype.toString()

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This commit is contained in:
Linus Groh 2021-08-19 00:43:39 +01:00
parent 89eddb5bff
commit 421ad73b4f
5 changed files with 116 additions and 0 deletions
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34
Userland/Libraries/LibJS/Runtime/Temporal/PlainYearMonth.cpp
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@ -7,6 +7,7 @@
#include <LibJS/Runtime/AbstractOperations.h>
#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/Temporal/AbstractOperations.h>
#include <LibJS/Runtime/Temporal/Calendar.h>
#include <LibJS/Runtime/Temporal/PlainDate.h>
#include <LibJS/Runtime/Temporal/PlainYearMonth.h>
#include <LibJS/Runtime/Temporal/PlainYearMonthConstructor.h>
@ -186,4 +187,37 @@ PlainYearMonth* create_temporal_year_month(GlobalObject& global_object, i32 iso_
return object;
}
// 9.5.8 TemporalYearMonthToString ( yearMonth, showCalendar ), https://tc39.es/proposal-temporal/#sec-temporal-temporalyearmonthtostring
Optional<String> temporal_year_month_to_string(GlobalObject& global_object, PlainYearMonth& year_month, StringView show_calendar)
{
auto& vm = global_object.vm();
// 1. Assert: Type(yearMonth) is Object.
// 2. Assert: yearMonth has an [[InitializedTemporalYearMonth]] internal slot.
// 3. Let year be ! PadISOYear(yearMonth.[[ISOYear]]).
// 4. Let month be yearMonth.[[ISOMonth]] formatted as a two-digit decimal number, padded to the left with a zero if necessary.
// 5. Let result be the string-concatenation of year, the code unit 0x002D (HYPHEN-MINUS), and month.
auto result = String::formatted("{}-{:02}", pad_iso_year(year_month.iso_year()), year_month.iso_month());
// 6. Let calendarID be ? ToString(yearMonth.[[Calendar]]).
auto calendar_id = Value(&year_month.calendar()).to_string(global_object);
if (vm.exception())
return {};
// 7. If calendarID is not "iso8601", then
if (calendar_id != "iso8601") {
// a. Let day be yearMonth.[[ISODay]] formatted as a two-digit decimal number, padded to the left with a zero if necessary.
// b. Set result to the string-concatenation of result, the code unit 0x002D (HYPHEN-MINUS), and day.
result = String::formatted("{}-{:02}", result, year_month.iso_day());
}
// 8. Let calendarString be ! FormatCalendarAnnotation(calendarID, showCalendar).
auto calendar_string = format_calendar_annotation(calendar_id, show_calendar);
// 9. Set result to the string-concatenation of result and calendarString.
// 10. Return result.
return String::formatted("{}{}", result, calendar_string);
}
}