[Temporal] Add Temporal.Calendar.prototype.monthCode

Spec Text:
https://tc39.es/proposal-temporal/#sec-temporal.calendar.prototype.monthcode

Note- this is only the non-intl version. intl version in
https://tc39.es/proposal-temporal/#sup-temporal.calendar.prototype.monthcode
will be implemented in later cl.

Bug: v8:11544
Change-Id: I52dfc1bda6d2ed8c0aba735c64d7ae8227844ed1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3531555Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80348}

src/builtins/builtins-temporal.cc

@@ -302,8 +302,6 @@ TO_BE_IMPLEMENTED(TemporalCalendarPrototypeMonthDayFromFields)
 TO_BE_IMPLEMENTED(TemporalCalendarPrototypeDateAdd)
 /* Temporal #sec-temporal.calendar.prototype.month */
 TO_BE_IMPLEMENTED(TemporalCalendarPrototypeMonth)
-/* Temporal #sec-temporal.calendar.prototype.monthcode */
-TO_BE_IMPLEMENTED(TemporalCalendarPrototypeMonthCode)
 /* Temporal #sec-temporal.calendar.prototype.weekofyear */
 TO_BE_IMPLEMENTED(TemporalCalendarPrototypeWeekOfYear)
 /* Temporal #sec-temporal.calendar.prototype.tojson */
@@ -799,6 +797,7 @@ TEMPORAL_PROTOTYPE_METHOD1(Calendar, DayOfWeek, dayOfWeek)
 TEMPORAL_PROTOTYPE_METHOD1(Calendar, DayOfYear, dayOfYear)
 TEMPORAL_PROTOTYPE_METHOD1(Calendar, InLeapYear, inLeapYear)
 TEMPORAL_PROTOTYPE_METHOD2(Calendar, MergeFields, mergeFields)
+TEMPORAL_PROTOTYPE_METHOD1(Calendar, MonthCode, monthCode)
 TEMPORAL_PROTOTYPE_METHOD1(Calendar, MonthsInYear, monthsInYear)
 TEMPORAL_PROTOTYPE_METHOD1(Calendar, Year, year)
 TEMPORAL_TO_STRING(Calendar)

src/objects/js-temporal-objects.cc

@@ -6224,6 +6224,51 @@ MaybeHandle<Smi> JSTemporalCalendar::Day(Isolate* isolate,
   return handle(Smi::FromInt(day), isolate);
 }
 
+// #sec-temporal.calendar.prototype.monthcode
+MaybeHandle<String> JSTemporalCalendar::MonthCode(
+    Isolate* isolate, Handle<JSTemporalCalendar> calendar,
+    Handle<Object> temporal_date_like) {
+  // 1. Let calendar be the this value.
+  // 2. Perform ? RequireInternalSlot(calendar,
+  // [[InitializedTemporalCalendar]]).
+  // 3. Assert: calendar.[[Identifier]] is "iso8601".
+  // 4. If Type(temporalDateLike) is not Object or temporalDateLike does not
+  // have an [[InitializedTemporalDate]], [[InitializedTemporalDateTime]],
+  // [[InitializedTemporalMonthDay]], or
+  // [[InitializedTemporalYearMonth]] internal slot, then
+  if (!(IsPlainDatePlainDateTimeOrPlainYearMonth(temporal_date_like) ||
+        temporal_date_like->IsJSTemporalPlainMonthDay())) {
+    // a. Set temporalDateLike to ? ToTemporalDate(temporalDateLike).
+    ASSIGN_RETURN_ON_EXCEPTION(
+        isolate, temporal_date_like,
+        ToTemporalDate(isolate, temporal_date_like,
+                       isolate->factory()->NewJSObjectWithNullProto(),
+                       "Temporal.Calendar.prototype.monthCode"),
+        String);
+  }
+
+  // 5. Return ! ISOMonthCode(temporalDateLike).
+  int32_t month;
+  if (temporal_date_like->IsJSTemporalPlainDate()) {
+    month = Handle<JSTemporalPlainDate>::cast(temporal_date_like)->iso_month();
+  } else if (temporal_date_like->IsJSTemporalPlainDateTime()) {
+    month =
+        Handle<JSTemporalPlainDateTime>::cast(temporal_date_like)->iso_month();
+  } else if (temporal_date_like->IsJSTemporalPlainMonthDay()) {
+    month =
+        Handle<JSTemporalPlainMonthDay>::cast(temporal_date_like)->iso_month();
+  } else {
+    DCHECK(temporal_date_like->IsJSTemporalPlainYearMonth());
+    month =
+        Handle<JSTemporalPlainYearMonth>::cast(temporal_date_like)->iso_month();
+  }
+  IncrementalStringBuilder builder(isolate);
+  builder.AppendCString((month < 10) ? "M0" : "M");
+  builder.AppendInt(month);
+
+  return builder.Finish();
+}
+
 // #sec-temporal.calendar.prototype.tostring
 MaybeHandle<String> JSTemporalCalendar::ToString(
     Isolate* isolate, Handle<JSTemporalCalendar> calendar,

src/objects/js-temporal-objects.h

@@ -82,6 +82,11 @@ class JSTemporalCalendar
       Isolate* isolate, Handle<JSTemporalCalendar> calendar,
       Handle<Object> temporal_date_like);
 
+  // #sec-temporal.calendar.prototype.dateuntil
+  V8_WARN_UNUSED_RESULT static MaybeHandle<JSTemporalDuration> DateUntil(
+      Isolate* isolate, Handle<JSTemporalCalendar> calendar, Handle<Object> one,
+      Handle<Object> two, Handle<Object> options);
+
   // #sec-temporal.calendar.prototype.daysinmonth
   V8_WARN_UNUSED_RESULT static MaybeHandle<Smi> DaysInMonth(
       Isolate* isolate, Handle<JSTemporalCalendar> calendar,
@@ -102,10 +107,10 @@ class JSTemporalCalendar
       Isolate* isolate, Handle<JSTemporalCalendar> calendar,
       Handle<Object> fields, Handle<Object> additional_fields);
 
-  // #sec-temporal.calendar.prototype.dateuntil
-  V8_WARN_UNUSED_RESULT static MaybeHandle<JSTemporalDuration> DateUntil(
-      Isolate* isolate, Handle<JSTemporalCalendar> calendar, Handle<Object> one,
-      Handle<Object> two, Handle<Object> options);
+  // #sec-temporal.calendar.prototype.monthcode
+  V8_WARN_UNUSED_RESULT static MaybeHandle<String> MonthCode(
+      Isolate* isolate, Handle<JSTemporalCalendar> calendar,
+      Handle<Object> temporal_date_like);
 
   // #sec-temporal.calendar.prototype.day
   V8_WARN_UNUSED_RESULT static MaybeHandle<Smi> Day(

test/mjsunit/mjsunit.status

@@ -49,7 +49,6 @@
   'temporal/calendar-date-from-fields': [FAIL],
   'temporal/calendar-date-until': [FAIL],
   'temporal/calendar-month': [FAIL],
-  'temporal/calendar-month-code': [FAIL],
   'temporal/calendar-month-day-from-fields': [FAIL],
   'temporal/calendar-week-of-year': [FAIL],
   'temporal/calendar-year-month-from-fields': [FAIL],

test/test262/test262.status

@@ -484,22 +484,7 @@
   'built-ins/Temporal/Calendar/prototype/month/branding': [FAIL],
   'built-ins/Temporal/Calendar/prototype/month/calendar-fields-iterable': [FAIL],
   'built-ins/Temporal/Calendar/prototype/month/calendar-temporal-object': [FAIL],
-  'built-ins/Temporal/Calendar/prototype/monthCode/argument-string-with-utc-designator': [FAIL],
-  'built-ins/Temporal/Calendar/prototype/monthCode/argument-zoneddatetime-timezone-getoffsetnanosecondsfor-non-integer': [FAIL],
-  'built-ins/Temporal/Calendar/prototype/monthCode/argument-zoneddatetime-timezone-getoffsetnanosecondsfor-not-callable': [FAIL],
-  'built-ins/Temporal/Calendar/prototype/monthCode/argument-zoneddatetime-timezone-getoffsetnanosecondsfor-out-of-range': [FAIL],
-  'built-ins/Temporal/Calendar/prototype/monthCode/argument-zoneddatetime-timezone-getoffsetnanosecondsfor-wrong-type': [FAIL],
   'built-ins/Temporal/Calendar/prototype/monthCode/basic': [FAIL],
-  'built-ins/Temporal/Calendar/prototype/monthCode/branding': [FAIL],
-  'built-ins/Temporal/Calendar/prototype/monthCode/calendar-fields-iterable': [FAIL],
-  'built-ins/Temporal/Calendar/prototype/monthCode/calendar-temporal-object': [FAIL],
-  'built-ins/Temporal/Calendar/prototype/monthCode/date': [FAIL],
-  'built-ins/Temporal/Calendar/prototype/monthCode/date-time': [FAIL],
-  'built-ins/Temporal/Calendar/prototype/monthCode/infinity-throws-rangeerror': [FAIL],
-  'built-ins/Temporal/Calendar/prototype/monthCode/month-day': [FAIL],
-  'built-ins/Temporal/Calendar/prototype/monthCode/string': [FAIL],
-  'built-ins/Temporal/Calendar/prototype/monthCode/throw-range-error-ToTemporalDate': [FAIL],
-  'built-ins/Temporal/Calendar/prototype/monthCode/year-month': [FAIL],
   'built-ins/Temporal/Calendar/prototype/month/date': [FAIL],
   'built-ins/Temporal/Calendar/prototype/month/date-time': [FAIL],
   'built-ins/Temporal/Calendar/prototype/monthDayFromFields/branding': [FAIL],
@@ -1268,7 +1253,6 @@
   'built-ins/Temporal/PlainDateTime/prototype/withPlainTime/time-undefined': [FAIL],
   'built-ins/Temporal/PlainDateTime/prototype/with/read-time-fields-before-datefromfields': [FAIL],
   'built-ins/Temporal/PlainDateTime/prototype/with/subclassing-ignored': [FAIL],
-  'built-ins/Temporal/PlainMonthDay/basic': [FAIL],
   'built-ins/Temporal/PlainMonthDay/from/argument-string-with-utc-designator': [FAIL],
   'built-ins/Temporal/PlainMonthDay/from/calendar-fields-iterable': [FAIL],
   'built-ins/Temporal/PlainMonthDay/from/calendar-monthdayfromfields-called-with-options-undefined': [FAIL],
@@ -1296,7 +1280,6 @@
   'built-ins/Temporal/PlainMonthDay/prototype/equals/calendars': [FAIL],
   'built-ins/Temporal/PlainMonthDay/prototype/equals/calendar-temporal-object': [FAIL],
   'built-ins/Temporal/PlainMonthDay/prototype/equals/infinity-throws-rangeerror': [FAIL],
-  'built-ins/Temporal/PlainMonthDay/prototype/monthCode/basic': [FAIL],
   'built-ins/Temporal/PlainMonthDay/prototype/toJSON/branding': [FAIL],
   'built-ins/Temporal/PlainMonthDay/prototype/toJSON/calendarname': [FAIL],
   'built-ins/Temporal/PlainMonthDay/prototype/toJSON/year-format': [FAIL],
@@ -2151,7 +2134,6 @@
   'intl402/Temporal/Calendar/prototype/eraYear/branding': [FAIL],
   'intl402/Temporal/Calendar/prototype/eraYear/calendar-datefromfields-called-with-options-undefined': [FAIL],
   'intl402/Temporal/Calendar/prototype/eraYear/infinity-throws-rangeerror': [FAIL],
-  'intl402/Temporal/Calendar/prototype/monthCode/infinity-throws-rangeerror': [FAIL],
   'intl402/Temporal/Calendar/prototype/monthDayFromFields/infinity-throws-rangeerror': [FAIL],
   'intl402/Temporal/Calendar/prototype/month/infinity-throws-rangeerror': [FAIL],
   'intl402/Temporal/Calendar/prototype/weekOfYear/infinity-throws-rangeerror': [FAIL],
@@ -2568,7 +2550,6 @@
 
   'built-ins/Temporal/Calendar/prototype/dateAdd/argument-string-invalid': [FAIL],
   'built-ins/Temporal/Calendar/prototype/month/argument-string-invalid': [FAIL],
-  'built-ins/Temporal/Calendar/prototype/monthCode/argument-string-invalid': [FAIL],
   'built-ins/Temporal/Calendar/prototype/weekOfYear/argument-string-invalid': [FAIL],
   'built-ins/Temporal/Calendar/prototype/yearMonthFromFields/basic': [FAIL],
   'built-ins/Temporal/Calendar/prototype/yearMonthFromFields/fields-missing-properties': [FAIL],
@@ -2838,10 +2819,8 @@
   'built-ins/Temporal/Calendar/prototype/month/argument-propertybag-calendar-number': [FAIL],
   'built-ins/Temporal/Calendar/prototype/month/argument-propertybag-calendar-wrong-type': [FAIL],
   'built-ins/Temporal/Calendar/prototype/month/argument-wrong-type': [FAIL],
-  'built-ins/Temporal/Calendar/prototype/monthCode/argument-number': [FAIL],
   'built-ins/Temporal/Calendar/prototype/monthCode/argument-propertybag-calendar-number': [FAIL],
   'built-ins/Temporal/Calendar/prototype/monthCode/argument-propertybag-calendar-wrong-type': [FAIL],
-  'built-ins/Temporal/Calendar/prototype/monthCode/argument-wrong-type': [FAIL],
   'built-ins/Temporal/Calendar/prototype/monthsInYear/argument-propertybag-calendar-number': [FAIL],
   'built-ins/Temporal/Calendar/prototype/monthsInYear/argument-propertybag-calendar-wrong-type': [FAIL],
   'built-ins/Temporal/Calendar/prototype/weekOfYear/argument-number': [FAIL],