tor-browser

PlainDate.cpp (50091B)

---

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "builtin/temporal/PlainDate.h"

#include "mozilla/Assertions.h"
#include "mozilla/CheckedInt.h"

#include <cmath>
#include <cstdlib>
#include <stdint.h>

#include "jsdate.h"
#include "jsnum.h"
#include "jspubtd.h"
#include "jstypes.h"
#include "NamespaceImports.h"

#include "builtin/intl/DateTimeFormat.h"
#include "builtin/temporal/Calendar.h"
#include "builtin/temporal/CalendarFields.h"
#include "builtin/temporal/Duration.h"
#include "builtin/temporal/Instant.h"
#include "builtin/temporal/PlainDateTime.h"
#include "builtin/temporal/PlainMonthDay.h"
#include "builtin/temporal/PlainTime.h"
#include "builtin/temporal/PlainYearMonth.h"
#include "builtin/temporal/Temporal.h"
#include "builtin/temporal/TemporalParser.h"
#include "builtin/temporal/TemporalRoundingMode.h"
#include "builtin/temporal/TemporalTypes.h"
#include "builtin/temporal/TemporalUnit.h"
#include "builtin/temporal/TimeZone.h"
#include "builtin/temporal/ToString.h"
#include "builtin/temporal/ZonedDateTime.h"
#include "gc/AllocKind.h"
#include "gc/Barrier.h"
#include "gc/GCEnum.h"
#include "js/CallArgs.h"
#include "js/CallNonGenericMethod.h"
#include "js/Class.h"
#include "js/ErrorReport.h"
#include "js/friend/ErrorMessages.h"
#include "js/PropertyDescriptor.h"
#include "js/PropertySpec.h"
#include "js/RootingAPI.h"
#include "js/TypeDecls.h"
#include "js/Value.h"
#include "vm/BytecodeUtil.h"
#include "vm/GlobalObject.h"
#include "vm/JSAtomState.h"
#include "vm/JSContext.h"
#include "vm/JSObject.h"
#include "vm/PlainObject.h"
#include "vm/StringType.h"

#include "vm/JSObject-inl.h"
#include "vm/NativeObject-inl.h"
#include "vm/ObjectOperations-inl.h"

using namespace js;
using namespace js::temporal;

static inline bool IsPlainDate(Handle<Value> v) {
 return v.isObject() && v.toObject().is<PlainDateObject>();
}

#ifdef DEBUG
/**
* IsValidISODate ( year, month, day )
*/
bool js::temporal::IsValidISODate(const ISODate& date) {
 const auto& [year, month, day] = date;

 // Step 1.
 if (month < 1 || month > 12) {
   return false;
 }

 // Step 2.
 int32_t daysInMonth = js::temporal::ISODaysInMonth(year, month);

 // Steps 3-4.
 return 1 <= day && day <= daysInMonth;
}
#endif

/**
* ISODateWithinLimits ( isoDate )
*/
bool js::temporal::ISODateWithinLimits(const ISODate& isoDate) {
 MOZ_ASSERT(IsValidISODate(isoDate));

 constexpr auto min = ISODate::min();
 constexpr auto max = ISODate::max();

 const auto& year = isoDate.year;

 // Fast-path when the input is definitely in range.
 if (min.year < year && year < max.year) {
   return true;
 }

 // Check |isoDate| is within the valid limits.
 if (year < 0) {
   return isoDate >= min;
 }
 return isoDate <= max;
}

static void ReportInvalidDateValue(JSContext* cx, const char* name, int32_t min,
                                  int32_t max, double num) {
 Int32ToCStringBuf minCbuf;
 const char* minStr = Int32ToCString(&minCbuf, min);

 Int32ToCStringBuf maxCbuf;
 const char* maxStr = Int32ToCString(&maxCbuf, max);

 ToCStringBuf numCbuf;
 const char* numStr = NumberToCString(&numCbuf, num);

 JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr,
                           JSMSG_TEMPORAL_PLAIN_DATE_INVALID_VALUE, name,
                           minStr, maxStr, numStr);
}

template <typename T>
static inline bool ThrowIfInvalidDateValue(JSContext* cx, const char* name,
                                          int32_t min, int32_t max, T num) {
 if (min <= num && num <= max) {
   return true;
 }
 ReportInvalidDateValue(cx, name, min, max, num);
 return false;
}

/**
* IsValidISODate ( year, month, day )
*/
template <typename T>
static bool ThrowIfInvalidISODate(JSContext* cx, T year, T month, T day) {
 static_assert(std::is_same_v<T, int32_t> || std::is_same_v<T, double>);

 // Step 1.
 MOZ_ASSERT(IsInteger(year));
 MOZ_ASSERT(IsInteger(month));
 MOZ_ASSERT(IsInteger(day));

 if constexpr (std::is_same_v<T, double>) {
   if (!ThrowIfInvalidDateValue(cx, "year", INT32_MIN, INT32_MAX, year)) {
     return false;
   }
 }

 // Step 2.
 if (!ThrowIfInvalidDateValue(cx, "month", 1, 12, month)) {
   return false;
 }

 // Step 3.
 int32_t daysInMonth =
     js::temporal::ISODaysInMonth(int32_t(year), int32_t(month));

 // Steps 4-5.
 return ThrowIfInvalidDateValue(cx, "day", 1, daysInMonth, day);
}

/**
* IsValidISODate ( year, month, day )
*/
bool js::temporal::ThrowIfInvalidISODate(JSContext* cx, const ISODate& date) {
 const auto& [year, month, day] = date;
 return ::ThrowIfInvalidISODate(cx, year, month, day);
}

/**
* IsValidISODate ( year, month, day )
*/
bool js::temporal::ThrowIfInvalidISODate(JSContext* cx, double year,
                                        double month, double day) {
 return ::ThrowIfInvalidISODate(cx, year, month, day);
}

/**
* CreateTemporalDate ( isoDate, calendar [ , newTarget ] )
*/
static PlainDateObject* CreateTemporalDate(JSContext* cx, const CallArgs& args,
                                          const ISODate& isoDate,
                                          Handle<CalendarValue> calendar) {
 MOZ_ASSERT(IsValidISODate(isoDate));

 // Step 1.
 if (!ISODateWithinLimits(isoDate)) {
   JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr,
                             JSMSG_TEMPORAL_PLAIN_DATE_INVALID);
   return nullptr;
 }

 // Steps 2-3.
 Rooted<JSObject*> proto(cx);
 if (!GetPrototypeFromBuiltinConstructor(cx, args, JSProto_PlainDate,
                                         &proto)) {
   return nullptr;
 }

 auto* object = NewObjectWithClassProto<PlainDateObject>(cx, proto);
 if (!object) {
   return nullptr;
 }

 // Step 4.
 auto packedDate = PackedDate::pack(isoDate);
 object->initFixedSlot(PlainDateObject::PACKED_DATE_SLOT,
                       PrivateUint32Value(packedDate.value));

 // Step 5.
 object->initFixedSlot(PlainDateObject::CALENDAR_SLOT, calendar.toSlotValue());

 // Step 6.
 return object;
}

/**
* CreateTemporalDate ( isoDate, calendar [ , newTarget ] )
*/
PlainDateObject* js::temporal::CreateTemporalDate(
   JSContext* cx, const ISODate& isoDate, Handle<CalendarValue> calendar) {
 MOZ_ASSERT(IsValidISODate(isoDate));

 // Step 1.
 if (!ISODateWithinLimits(isoDate)) {
   JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr,
                             JSMSG_TEMPORAL_PLAIN_DATE_INVALID);
   return nullptr;
 }

 // Steps 2-3.
 auto* object = NewBuiltinClassInstance<PlainDateObject>(cx);
 if (!object) {
   return nullptr;
 }

 // Step 4.
 auto packedDate = PackedDate::pack(isoDate);
 object->initFixedSlot(PlainDateObject::PACKED_DATE_SLOT,
                       PrivateUint32Value(packedDate.value));

 // Step 5.
 object->initFixedSlot(PlainDateObject::CALENDAR_SLOT, calendar.toSlotValue());

 // Step 6.
 return object;
}

/**
* CreateTemporalDate ( isoDate, calendar [ , newTarget ] )
*/
PlainDateObject* js::temporal::CreateTemporalDate(JSContext* cx,
                                                 Handle<PlainDate> date) {
 MOZ_ASSERT(ISODateWithinLimits(date));
 return CreateTemporalDate(cx, date, date.calendar());
}

/**
* CreateTemporalDate ( isoDate, calendar [ , newTarget ] )
*/
bool js::temporal::CreateTemporalDate(JSContext* cx, const ISODate& isoDate,
                                     Handle<CalendarValue> calendar,
                                     MutableHandle<PlainDate> result) {
 MOZ_ASSERT(IsValidISODate(isoDate));

 // Step 1.
 if (!ISODateWithinLimits(isoDate)) {
   JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr,
                             JSMSG_TEMPORAL_PLAIN_DATE_INVALID);
   return false;
 }

 // Steps 2-6.
 result.set(PlainDate{isoDate, calendar});
 return true;
}

struct DateOptions {
 TemporalOverflow overflow = TemporalOverflow::Constrain;
};

/**
* ToTemporalDate ( item [ , options ] )
*/
static bool ToTemporalDateOptions(JSContext* cx, Handle<Value> options,
                                 DateOptions* result) {
 if (options.isUndefined()) {
   *result = {};
   return true;
 }

 // NOTE: |options| are only passed from `Temporal.PlainDate.from`.

 Rooted<JSObject*> resolvedOptions(
     cx, RequireObjectArg(cx, "options", "from", options));
 if (!resolvedOptions) {
   return false;
 }

 auto overflow = TemporalOverflow::Constrain;
 if (!GetTemporalOverflowOption(cx, resolvedOptions, &overflow)) {
   return false;
 }

 *result = {overflow};
 return true;
}

/**
* ToTemporalDate ( item [ , options ] )
*/
static bool ToTemporalDate(JSContext* cx, Handle<JSObject*> item,
                          Handle<Value> options,
                          MutableHandle<PlainDate> result) {
 // Step 1. (Not applicable in our implementation.)

 // Step 2.a.
 if (auto* plainDate = item->maybeUnwrapIf<PlainDateObject>()) {
   auto date = plainDate->date();
   Rooted<CalendarValue> calendar(cx, plainDate->calendar());
   if (!calendar.wrap(cx)) {
     return false;
   }

   // Steps 2.a.i-ii.
   DateOptions ignoredOptions;
   if (!ToTemporalDateOptions(cx, options, &ignoredOptions)) {
     return false;
   }

   // Step 2.a.iii.
   result.set(PlainDate{date, calendar});
   return true;
 }

 // Step 2.b.
 if (auto* zonedDateTime = item->maybeUnwrapIf<ZonedDateTimeObject>()) {
   auto epochNs = zonedDateTime->epochNanoseconds();
   Rooted<TimeZoneValue> timeZone(cx, zonedDateTime->timeZone());
   Rooted<CalendarValue> calendar(cx, zonedDateTime->calendar());

   if (!timeZone.wrap(cx)) {
     return false;
   }
   if (!calendar.wrap(cx)) {
     return false;
   }

   // Steps 2.b.ii.
   ISODateTime isoDateTime;
   if (!GetISODateTimeFor(cx, timeZone, epochNs, &isoDateTime)) {
     return false;
   }

   // Steps 2.b.ii-iii.
   DateOptions ignoredOptions;
   if (!ToTemporalDateOptions(cx, options, &ignoredOptions)) {
     return false;
   }

   // Step 2.b.iv.
   result.set(PlainDate{isoDateTime.date, calendar});
   return true;
 }

 // Step 2.c.
 if (auto* dateTime = item->maybeUnwrapIf<PlainDateTimeObject>()) {
   auto date = dateTime->date();
   Rooted<CalendarValue> calendar(cx, dateTime->calendar());
   if (!calendar.wrap(cx)) {
     return false;
   }

   // Steps 2.c.i-ii.
   DateOptions ignoredOptions;
   if (!ToTemporalDateOptions(cx, options, &ignoredOptions)) {
     return false;
   }

   // Step 2.c.iii.
   result.set(PlainDate{date, calendar});
   return true;
 }

 // Step 2.d.
 Rooted<CalendarValue> calendar(cx);
 if (!GetTemporalCalendarWithISODefault(cx, item, &calendar)) {
   return false;
 }

 // Step 2.e.
 Rooted<CalendarFields> fields(cx);
 if (!PrepareCalendarFields(cx, calendar, item,
                            {
                                CalendarField::Year,
                                CalendarField::Month,
                                CalendarField::MonthCode,
                                CalendarField::Day,
                            },
                            &fields)) {
   return false;
 }

 // Steps 2.f-g.
 DateOptions resolvedOptions;
 if (!ToTemporalDateOptions(cx, options, &resolvedOptions)) {
   return false;
 }
 auto [overflow] = resolvedOptions;

 // Steps 2.h-i.
 return CalendarDateFromFields(cx, calendar, fields, overflow, result);
}

/**
* ToTemporalDate ( item [ , options ] )
*/
static bool ToTemporalDate(JSContext* cx, Handle<Value> item,
                          Handle<Value> options,
                          MutableHandle<PlainDate> result) {
 // Step 1. (Not applicable in our implementation.)

 // Step 2.
 if (item.isObject()) {
   Rooted<JSObject*> itemObj(cx, &item.toObject());
   return ToTemporalDate(cx, itemObj, options, result);
 }

 // Step 3.
 if (!item.isString()) {
   ReportValueError(cx, JSMSG_UNEXPECTED_TYPE, JSDVG_IGNORE_STACK, item,
                    nullptr, "not a string");
   return false;
 }
 Rooted<JSString*> string(cx, item.toString());

 // Step 4.
 ISODateTime dateTime;
 Rooted<JSString*> calendarString(cx);
 if (!ParseTemporalDateTimeString(cx, string, &dateTime, &calendarString)) {
   return false;
 }
 MOZ_ASSERT(IsValidISODate(dateTime.date));

 // Steps 5-7.
 Rooted<CalendarValue> calendar(cx, CalendarValue(CalendarId::ISO8601));
 if (calendarString) {
   if (!CanonicalizeCalendar(cx, calendarString, &calendar)) {
     return false;
   }
 }

 // Steps 8-9.
 DateOptions ignoredOptions;
 if (!ToTemporalDateOptions(cx, options, &ignoredOptions)) {
   return false;
 }

 // Steps 10-11.
 return CreateTemporalDate(cx, dateTime.date, calendar, result);
}

/**
* ToTemporalDate ( item [ , options ] )
*/
static bool ToTemporalDate(JSContext* cx, Handle<Value> item,
                          MutableHandle<PlainDate> result) {
 return ToTemporalDate(cx, item, UndefinedHandleValue, result);
}

static bool IsValidISODateEpochMilliseconds(int64_t epochMilliseconds) {
 // Epoch nanoseconds limits, adjusted to the range supported by ISODate.
 constexpr auto oneDay = EpochDuration::fromDays(1);
 constexpr auto min = EpochNanoseconds::min() - oneDay;
 constexpr auto max = EpochNanoseconds::max() + oneDay;

 // NB: Minimum limit is inclusive, whereas maximim limit is exclusive.
 auto epochNs = EpochNanoseconds::fromMilliseconds(epochMilliseconds);
 return min <= epochNs && epochNs < max;
}

/**
* BalanceISODate ( year, month, day )
*/
bool js::temporal::BalanceISODate(JSContext* cx, const ISODate& date,
                                 int64_t days, ISODate* result) {
 MOZ_ASSERT(IsValidISODate(date));
 MOZ_ASSERT(ISODateWithinLimits(date));

 // Step 1.
 auto epochDays = MakeDay(date) + mozilla::CheckedInt64{days};

 // Step 2.
 auto epochMilliseconds = epochDays * ToMilliseconds(TemporalUnit::Day);
 if (!epochMilliseconds.isValid() ||
     !IsValidISODateEpochMilliseconds(epochMilliseconds.value())) {
   JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr,
                             JSMSG_TEMPORAL_PLAIN_DATE_INVALID);
   return false;
 }

 // Step 3.
 auto [year, month, day] = ToYearMonthDay(epochMilliseconds.value());

 *result = ISODate{year, month + 1, day};
 MOZ_ASSERT(IsValidISODate(*result));
 MOZ_ASSERT(ISODateWithinLimits(*result));

 return true;
}

/**
* BalanceISODate ( year, month, day )
*/
ISODate js::temporal::BalanceISODate(const ISODate& date, int32_t days) {
 MOZ_ASSERT(IsValidISODate(date));
 MOZ_ASSERT(ISODateWithinLimits(date));
 MOZ_ASSERT(std::abs(days) <= 400'000'000, "days limit for ToYearMonthDay");

 // Step 1.
 int32_t epochDays = MakeDay(date) + days;

 // Step 2.
 int64_t epochMilliseconds = epochDays * ToMilliseconds(TemporalUnit::Day);

 // Step 3.
 auto [year, month, day] = ToYearMonthDay(epochMilliseconds);

 // NB: The returned date is possibly outside the valid limits!
 auto result = ISODate{year, month + 1, day};
 MOZ_ASSERT(IsValidISODate(result));

 return result;
}

/**
* CompareISODate ( y1, m1, d1, y2, m2, d2 )
*/
int32_t js::temporal::CompareISODate(const ISODate& one, const ISODate& two) {
 // Steps 1-2.
 if (one.year != two.year) {
   return one.year < two.year ? -1 : 1;
 }

 // Steps 3-4.
 if (one.month != two.month) {
   return one.month < two.month ? -1 : 1;
 }

 // Steps 5-6.
 if (one.day != two.day) {
   return one.day < two.day ? -1 : 1;
 }

 // Step 7.
 return 0;
}

/**
* DifferenceTemporalPlainDate ( operation, temporalDate, other, options )
*/
static bool DifferenceTemporalPlainDate(JSContext* cx,
                                       TemporalDifference operation,
                                       const CallArgs& args) {
 Rooted<PlainDate> temporalDate(
     cx, &args.thisv().toObject().as<PlainDateObject>());

 // Step 1.
 Rooted<PlainDate> other(cx);
 if (!ToTemporalDate(cx, args.get(0), &other)) {
   return false;
 }

 // Step 2.
 if (!CalendarEquals(temporalDate.calendar(), other.calendar())) {
   JS_ReportErrorNumberASCII(
       cx, GetErrorMessage, nullptr, JSMSG_TEMPORAL_CALENDAR_INCOMPATIBLE,
       CalendarIdentifier(temporalDate.calendar()).data(),
       CalendarIdentifier(other.calendar()).data());
   return false;
 }

 // Steps 3-4.
 DifferenceSettings settings;
 if (args.hasDefined(1)) {
   // Step 3.
   Rooted<JSObject*> options(
       cx, RequireObjectArg(cx, "options", ToName(operation), args[1]));
   if (!options) {
     return false;
   }

   // Step 4.
   if (!GetDifferenceSettings(cx, operation, options, TemporalUnitGroup::Date,
                              TemporalUnit::Day, TemporalUnit::Day,
                              &settings)) {
     return false;
   }
 } else {
   // Steps 3-4.
   settings = {
       TemporalUnit::Day,
       TemporalUnit::Day,
       TemporalRoundingMode::Trunc,
       Increment{1},
   };
 }

 // Step 5.
 if (temporalDate.date() == other.date()) {
   auto* obj = CreateTemporalDuration(cx, {});
   if (!obj) {
     return false;
   }

   args.rval().setObject(*obj);
   return true;
 }

 // Step 6.
 DateDuration dateDifference;
 if (!CalendarDateUntil(cx, temporalDate.calendar(), temporalDate.date(),
                        other.date(), settings.largestUnit, &dateDifference)) {
   return false;
 }

 // Step 7.
 auto duration = InternalDuration{dateDifference, {}};

 // Step 8.
 if (settings.smallestUnit != TemporalUnit::Day ||
     settings.roundingIncrement != Increment{1}) {
   // Step 8.a.
   auto isoDateTime = ISODateTime{temporalDate.date(), {}};

   // Step 8.b.
   auto originEpochNs = GetUTCEpochNanoseconds(isoDateTime);

   // Step 8.c.
   auto isoDateTimeOther = ISODateTime{other.date(), {}};

   // Step 8.d.
   auto destEpochNs = GetUTCEpochNanoseconds(isoDateTimeOther);

   // Step 8.e.
   Rooted<TimeZoneValue> timeZone(cx, TimeZoneValue{});
   if (!RoundRelativeDuration(cx, duration, originEpochNs, destEpochNs,
                              isoDateTime, timeZone, temporalDate.calendar(),
                              settings.largestUnit, settings.roundingIncrement,
                              settings.smallestUnit, settings.roundingMode,
                              &duration)) {
     return false;
   }
 }
 MOZ_ASSERT(IsValidDuration(duration));
 MOZ_ASSERT(duration.time == TimeDuration{});

 // Step 9. (Inlined TemporalDurationFromInternal)
 auto result = duration.date.toDuration();

 // Step 10.
 if (operation == TemporalDifference::Since) {
   result = result.negate();
 }
 MOZ_ASSERT(IsValidDuration(result));

 // Step 11.
 auto* obj = CreateTemporalDuration(cx, result);
 if (!obj) {
   return false;
 }

 args.rval().setObject(*obj);
 return true;
}

/**
* AddDurationToDate ( operation, temporalDate, temporalDurationLike, options )
*/
static bool AddDurationToDate(JSContext* cx, TemporalAddDuration operation,
                             const CallArgs& args) {
 Rooted<PlainDate> temporalDate(
     cx, &args.thisv().toObject().as<PlainDateObject>());

 // Step 1.
 auto calendar = temporalDate.calendar();

 // Step 2.
 Duration duration;
 if (!ToTemporalDuration(cx, args.get(0), &duration)) {
   return false;
 }

 // Step 3.
 if (operation == TemporalAddDuration::Subtract) {
   duration = duration.negate();
 }

 // Step 4.
 auto dateDuration = ToDateDurationRecordWithoutTime(duration);

 // Steps 6-7.
 auto overflow = TemporalOverflow::Constrain;
 if (args.hasDefined(1)) {
   // Step 6.
   Rooted<JSObject*> options(
       cx, RequireObjectArg(cx, "options", ToName(operation), args[1]));
   if (!options) {
     return false;
   }

   // Step 7.
   if (!GetTemporalOverflowOption(cx, options, &overflow)) {
     return false;
   }
 }

 // Step 8.
 ISODate result;
 if (!CalendarDateAdd(cx, calendar, temporalDate.date(), dateDuration,
                      overflow, &result)) {
   return false;
 }

 // Step 9.
 auto* obj = CreateTemporalDate(cx, result, calendar);
 if (!obj) {
   return false;
 }

 args.rval().setObject(*obj);
 return true;
}

/**
* Temporal.PlainDate ( isoYear, isoMonth, isoDay [ , calendar ] )
*/
static bool PlainDateConstructor(JSContext* cx, unsigned argc, Value* vp) {
 CallArgs args = CallArgsFromVp(argc, vp);

 // Step 1.
 if (!ThrowIfNotConstructing(cx, args, "Temporal.PlainDate")) {
   return false;
 }

 // Step 2.
 double isoYear;
 if (!ToIntegerWithTruncation(cx, args.get(0), "year", &isoYear)) {
   return false;
 }

 // Step 3.
 double isoMonth;
 if (!ToIntegerWithTruncation(cx, args.get(1), "month", &isoMonth)) {
   return false;
 }

 // Step 4.
 double isoDay;
 if (!ToIntegerWithTruncation(cx, args.get(2), "day", &isoDay)) {
   return false;
 }

 // Steps 5-7.
 Rooted<CalendarValue> calendar(cx, CalendarValue(CalendarId::ISO8601));
 if (args.hasDefined(3)) {
   // Step 6.
   if (!args[3].isString()) {
     ReportValueError(cx, JSMSG_UNEXPECTED_TYPE, JSDVG_IGNORE_STACK, args[3],
                      nullptr, "not a string");
     return false;
   }

   // Step 7.
   Rooted<JSString*> calendarString(cx, args[3].toString());
   if (!CanonicalizeCalendar(cx, calendarString, &calendar)) {
     return false;
   }
 }

 // Step 8.
 if (!ThrowIfInvalidISODate(cx, isoYear, isoMonth, isoDay)) {
   return false;
 }

 // Step 9.
 auto isoDate = ISODate{int32_t(isoYear), int32_t(isoMonth), int32_t(isoDay)};

 // Step 10.
 auto* temporalDate = CreateTemporalDate(cx, args, isoDate, calendar);
 if (!temporalDate) {
   return false;
 }

 args.rval().setObject(*temporalDate);
 return true;
}

/**
* Temporal.PlainDate.from ( item [ , options ] )
*/
static bool PlainDate_from(JSContext* cx, unsigned argc, Value* vp) {
 CallArgs args = CallArgsFromVp(argc, vp);

 // Step 1.
 Rooted<PlainDate> date(cx);
 if (!ToTemporalDate(cx, args.get(0), args.get(1), &date)) {
   return false;
 }

 auto* result = CreateTemporalDate(cx, date);
 if (!result) {
   return false;
 }

 args.rval().setObject(*result);
 return true;
}

/**
* Temporal.PlainDate.compare ( one, two )
*/
static bool PlainDate_compare(JSContext* cx, unsigned argc, Value* vp) {
 CallArgs args = CallArgsFromVp(argc, vp);

 // Step 1.
 Rooted<PlainDate> one(cx);
 if (!ToTemporalDate(cx, args.get(0), &one)) {
   return false;
 }

 // Step 2.
 Rooted<PlainDate> two(cx);
 if (!ToTemporalDate(cx, args.get(1), &two)) {
   return false;
 }

 // Step 3.
 args.rval().setInt32(CompareISODate(one, two));
 return true;
}

/**
* get Temporal.PlainDate.prototype.calendarId
*/
static bool PlainDate_calendarId(JSContext* cx, const CallArgs& args) {
 auto* temporalDate = &args.thisv().toObject().as<PlainDateObject>();

 // Step 3.
 auto* str =
     NewStringCopy<CanGC>(cx, CalendarIdentifier(temporalDate->calendar()));
 if (!str) {
   return false;
 }

 args.rval().setString(str);
 return true;
}

/**
* get Temporal.PlainDate.prototype.calendarId
*/
static bool PlainDate_calendarId(JSContext* cx, unsigned argc, Value* vp) {
 // Steps 1-2.
 CallArgs args = CallArgsFromVp(argc, vp);
 return CallNonGenericMethod<IsPlainDate, PlainDate_calendarId>(cx, args);
}

/**
* get Temporal.PlainDate.prototype.era
*/
static bool PlainDate_era(JSContext* cx, const CallArgs& args) {
 auto* temporalDate = &args.thisv().toObject().as<PlainDateObject>();
 Rooted<CalendarValue> calendar(cx, temporalDate->calendar());

 // Step 3.
 return CalendarEra(cx, calendar, temporalDate->date(), args.rval());
}

/**
* get Temporal.PlainDate.prototype.era
*/
static bool PlainDate_era(JSContext* cx, unsigned argc, Value* vp) {
 // Steps 1-2.
 CallArgs args = CallArgsFromVp(argc, vp);
 return CallNonGenericMethod<IsPlainDate, PlainDate_era>(cx, args);
}

/**
* get Temporal.PlainDate.prototype.eraYear
*/
static bool PlainDate_eraYear(JSContext* cx, const CallArgs& args) {
 auto* temporalDate = &args.thisv().toObject().as<PlainDateObject>();
 Rooted<CalendarValue> calendar(cx, temporalDate->calendar());

 // Steps 3-5.
 return CalendarEraYear(cx, calendar, temporalDate->date(), args.rval());
}

/**
* get Temporal.PlainDate.prototype.eraYear
*/
static bool PlainDate_eraYear(JSContext* cx, unsigned argc, Value* vp) {
 // Steps 1-2.
 CallArgs args = CallArgsFromVp(argc, vp);
 return CallNonGenericMethod<IsPlainDate, PlainDate_eraYear>(cx, args);
}

/**
* get Temporal.PlainDate.prototype.year
*/
static bool PlainDate_year(JSContext* cx, const CallArgs& args) {
 auto* temporalDate = &args.thisv().toObject().as<PlainDateObject>();
 Rooted<CalendarValue> calendar(cx, temporalDate->calendar());

 // Step 3.
 return CalendarYear(cx, calendar, temporalDate->date(), args.rval());
}

/**
* get Temporal.PlainDate.prototype.year
*/
static bool PlainDate_year(JSContext* cx, unsigned argc, Value* vp) {
 // Steps 1-2.
 CallArgs args = CallArgsFromVp(argc, vp);
 return CallNonGenericMethod<IsPlainDate, PlainDate_year>(cx, args);
}

/**
* get Temporal.PlainDate.prototype.month
*/
static bool PlainDate_month(JSContext* cx, const CallArgs& args) {
 auto* temporalDate = &args.thisv().toObject().as<PlainDateObject>();
 Rooted<CalendarValue> calendar(cx, temporalDate->calendar());

 // Step 3.
 return CalendarMonth(cx, calendar, temporalDate->date(), args.rval());
}

/**
* get Temporal.PlainDate.prototype.month
*/
static bool PlainDate_month(JSContext* cx, unsigned argc, Value* vp) {
 // Steps 1-2.
 CallArgs args = CallArgsFromVp(argc, vp);
 return CallNonGenericMethod<IsPlainDate, PlainDate_month>(cx, args);
}

/**
* get Temporal.PlainDate.prototype.monthCode
*/
static bool PlainDate_monthCode(JSContext* cx, const CallArgs& args) {
 auto* temporalDate = &args.thisv().toObject().as<PlainDateObject>();
 Rooted<CalendarValue> calendar(cx, temporalDate->calendar());

 // Step 3.
 return CalendarMonthCode(cx, calendar, temporalDate->date(), args.rval());
}

/**
* get Temporal.PlainDate.prototype.monthCode
*/
static bool PlainDate_monthCode(JSContext* cx, unsigned argc, Value* vp) {
 // Steps 1-2.
 CallArgs args = CallArgsFromVp(argc, vp);
 return CallNonGenericMethod<IsPlainDate, PlainDate_monthCode>(cx, args);
}

/**
* get Temporal.PlainDate.prototype.day
*/
static bool PlainDate_day(JSContext* cx, const CallArgs& args) {
 auto* temporalDate = &args.thisv().toObject().as<PlainDateObject>();
 Rooted<CalendarValue> calendar(cx, temporalDate->calendar());

 // Step 3.
 return CalendarDay(cx, calendar, temporalDate->date(), args.rval());
}

/**
* get Temporal.PlainDate.prototype.day
*/
static bool PlainDate_day(JSContext* cx, unsigned argc, Value* vp) {
 // Steps 1-2.
 CallArgs args = CallArgsFromVp(argc, vp);
 return CallNonGenericMethod<IsPlainDate, PlainDate_day>(cx, args);
}

/**
* get Temporal.PlainDate.prototype.dayOfWeek
*/
static bool PlainDate_dayOfWeek(JSContext* cx, const CallArgs& args) {
 auto* temporalDate = &args.thisv().toObject().as<PlainDateObject>();
 Rooted<CalendarValue> calendar(cx, temporalDate->calendar());

 // Step 3.
 return CalendarDayOfWeek(cx, calendar, temporalDate->date(), args.rval());
}

/**
* get Temporal.PlainDate.prototype.dayOfWeek
*/
static bool PlainDate_dayOfWeek(JSContext* cx, unsigned argc, Value* vp) {
 // Steps 1-2.
 CallArgs args = CallArgsFromVp(argc, vp);
 return CallNonGenericMethod<IsPlainDate, PlainDate_dayOfWeek>(cx, args);
}

/**
* get Temporal.PlainDate.prototype.dayOfYear
*/
static bool PlainDate_dayOfYear(JSContext* cx, const CallArgs& args) {
 auto* temporalDate = &args.thisv().toObject().as<PlainDateObject>();
 Rooted<CalendarValue> calendar(cx, temporalDate->calendar());

 // Step 3.
 return CalendarDayOfYear(cx, calendar, temporalDate->date(), args.rval());
}

/**
* get Temporal.PlainDate.prototype.dayOfYear
*/
static bool PlainDate_dayOfYear(JSContext* cx, unsigned argc, Value* vp) {
 // Steps 1-2.
 CallArgs args = CallArgsFromVp(argc, vp);
 return CallNonGenericMethod<IsPlainDate, PlainDate_dayOfYear>(cx, args);
}

/**
* get Temporal.PlainDate.prototype.weekOfYear
*/
static bool PlainDate_weekOfYear(JSContext* cx, const CallArgs& args) {
 auto* temporalDate = &args.thisv().toObject().as<PlainDateObject>();
 Rooted<CalendarValue> calendar(cx, temporalDate->calendar());

 // Steps 3-5.
 return CalendarWeekOfYear(cx, calendar, temporalDate->date(), args.rval());
}

/**
* get Temporal.PlainDate.prototype.weekOfYear
*/
static bool PlainDate_weekOfYear(JSContext* cx, unsigned argc, Value* vp) {
 // Steps 1-2.
 CallArgs args = CallArgsFromVp(argc, vp);
 return CallNonGenericMethod<IsPlainDate, PlainDate_weekOfYear>(cx, args);
}

/**
* get Temporal.PlainDate.prototype.yearOfWeek
*/
static bool PlainDate_yearOfWeek(JSContext* cx, const CallArgs& args) {
 auto* temporalDate = &args.thisv().toObject().as<PlainDateObject>();
 Rooted<CalendarValue> calendar(cx, temporalDate->calendar());

 // Steps 3-5.
 return CalendarYearOfWeek(cx, calendar, temporalDate->date(), args.rval());
}

/**
* get Temporal.PlainDate.prototype.yearOfWeek
*/
static bool PlainDate_yearOfWeek(JSContext* cx, unsigned argc, Value* vp) {
 // Steps 1-2.
 CallArgs args = CallArgsFromVp(argc, vp);
 return CallNonGenericMethod<IsPlainDate, PlainDate_yearOfWeek>(cx, args);
}

/**
* get Temporal.PlainDate.prototype.daysInWeek
*/
static bool PlainDate_daysInWeek(JSContext* cx, const CallArgs& args) {
 auto* temporalDate = &args.thisv().toObject().as<PlainDateObject>();
 Rooted<CalendarValue> calendar(cx, temporalDate->calendar());

 // Step 3.
 return CalendarDaysInWeek(cx, calendar, temporalDate->date(), args.rval());
}

/**
* get Temporal.PlainDate.prototype.daysInWeek
*/
static bool PlainDate_daysInWeek(JSContext* cx, unsigned argc, Value* vp) {
 // Steps 1-2.
 CallArgs args = CallArgsFromVp(argc, vp);
 return CallNonGenericMethod<IsPlainDate, PlainDate_daysInWeek>(cx, args);
}

/**
* get Temporal.PlainDate.prototype.daysInMonth
*/
static bool PlainDate_daysInMonth(JSContext* cx, const CallArgs& args) {
 auto* temporalDate = &args.thisv().toObject().as<PlainDateObject>();
 Rooted<CalendarValue> calendar(cx, temporalDate->calendar());

 // Step 3.
 return CalendarDaysInMonth(cx, calendar, temporalDate->date(), args.rval());
}

/**
* get Temporal.PlainDate.prototype.daysInMonth
*/
static bool PlainDate_daysInMonth(JSContext* cx, unsigned argc, Value* vp) {
 // Steps 1-2.
 CallArgs args = CallArgsFromVp(argc, vp);
 return CallNonGenericMethod<IsPlainDate, PlainDate_daysInMonth>(cx, args);
}

/**
* get Temporal.PlainDate.prototype.daysInYear
*/
static bool PlainDate_daysInYear(JSContext* cx, const CallArgs& args) {
 auto* temporalDate = &args.thisv().toObject().as<PlainDateObject>();
 Rooted<CalendarValue> calendar(cx, temporalDate->calendar());

 // Step 3.
 return CalendarDaysInYear(cx, calendar, temporalDate->date(), args.rval());
}

/**
* get Temporal.PlainDate.prototype.daysInYear
*/
static bool PlainDate_daysInYear(JSContext* cx, unsigned argc, Value* vp) {
 // Steps 1-2.
 CallArgs args = CallArgsFromVp(argc, vp);
 return CallNonGenericMethod<IsPlainDate, PlainDate_daysInYear>(cx, args);
}

/**
* get Temporal.PlainDate.prototype.monthsInYear
*/
static bool PlainDate_monthsInYear(JSContext* cx, const CallArgs& args) {
 auto* temporalDate = &args.thisv().toObject().as<PlainDateObject>();
 Rooted<CalendarValue> calendar(cx, temporalDate->calendar());

 // Step 3.
 return CalendarMonthsInYear(cx, calendar, temporalDate->date(), args.rval());
}

/**
* get Temporal.PlainDate.prototype.monthsInYear
*/
static bool PlainDate_monthsInYear(JSContext* cx, unsigned argc, Value* vp) {
 // Steps 1-2.
 CallArgs args = CallArgsFromVp(argc, vp);
 return CallNonGenericMethod<IsPlainDate, PlainDate_monthsInYear>(cx, args);
}

/**
* get Temporal.PlainDate.prototype.inLeapYear
*/
static bool PlainDate_inLeapYear(JSContext* cx, const CallArgs& args) {
 auto* temporalDate = &args.thisv().toObject().as<PlainDateObject>();
 Rooted<CalendarValue> calendar(cx, temporalDate->calendar());

 // Step 3.
 return CalendarInLeapYear(cx, calendar, temporalDate->date(), args.rval());
}

/**
* get Temporal.PlainDate.prototype.inLeapYear
*/
static bool PlainDate_inLeapYear(JSContext* cx, unsigned argc, Value* vp) {
 // Steps 1-2.
 CallArgs args = CallArgsFromVp(argc, vp);
 return CallNonGenericMethod<IsPlainDate, PlainDate_inLeapYear>(cx, args);
}

/**
* Temporal.PlainDate.prototype.toPlainYearMonth ( )
*/
static bool PlainDate_toPlainYearMonth(JSContext* cx, const CallArgs& args) {
 Rooted<PlainDate> temporalDate(
     cx, &args.thisv().toObject().as<PlainDateObject>());

 // Step 3.
 auto calendar = temporalDate.calendar();

 // Step 4.
 Rooted<CalendarFields> fields(cx);
 if (!ISODateToFields(cx, temporalDate, &fields)) {
   return false;
 }

 // Step 5.
 Rooted<PlainYearMonth> result(cx);
 if (!CalendarYearMonthFromFields(cx, calendar, fields,
                                  TemporalOverflow::Constrain, &result)) {
   return false;
 }

 // Steps 6-7.
 auto* obj = CreateTemporalYearMonth(cx, result);
 if (!obj) {
   return false;
 }

 args.rval().setObject(*obj);
 return true;
}

/**
* Temporal.PlainDate.prototype.toPlainYearMonth ( )
*/
static bool PlainDate_toPlainYearMonth(JSContext* cx, unsigned argc,
                                      Value* vp) {
 // Steps 1-2.
 CallArgs args = CallArgsFromVp(argc, vp);
 return CallNonGenericMethod<IsPlainDate, PlainDate_toPlainYearMonth>(cx,
                                                                      args);
}

/**
* Temporal.PlainDate.prototype.toPlainMonthDay ( )
*/
static bool PlainDate_toPlainMonthDay(JSContext* cx, const CallArgs& args) {
 Rooted<PlainDate> temporalDate(
     cx, &args.thisv().toObject().as<PlainDateObject>());

 // Step 3.
 auto calendar = temporalDate.calendar();

 // Step 4.
 Rooted<CalendarFields> fields(cx);
 if (!ISODateToFields(cx, temporalDate, &fields)) {
   return false;
 }

 // Step 5.
 Rooted<PlainMonthDay> result(cx);
 if (!CalendarMonthDayFromFields(cx, calendar, fields,
                                 TemporalOverflow::Constrain, &result)) {
   return false;
 }

 // Steps 6-7.
 auto* obj = CreateTemporalMonthDay(cx, result);
 if (!obj) {
   return false;
 }

 args.rval().setObject(*obj);
 return true;
}

/**
* Temporal.PlainDate.prototype.toPlainMonthDay ( )
*/
static bool PlainDate_toPlainMonthDay(JSContext* cx, unsigned argc, Value* vp) {
 // Steps 1-2.
 CallArgs args = CallArgsFromVp(argc, vp);
 return CallNonGenericMethod<IsPlainDate, PlainDate_toPlainMonthDay>(cx, args);
}

/**
* Temporal.PlainDate.prototype.toPlainDateTime ( [ temporalTime ] )
*/
static bool PlainDate_toPlainDateTime(JSContext* cx, const CallArgs& args) {
 auto* temporalDate = &args.thisv().toObject().as<PlainDateObject>();
 Rooted<CalendarValue> calendar(cx, temporalDate->calendar());

 // Step 4. (Reordered)
 //
 // Default initialize the time component to all zero.
 auto isoDateTime = ISODateTime{temporalDate->date(), {}};

 // Step 3. (Inlined ToTemporalTimeOrMidnight)
 if (args.hasDefined(0)) {
   if (!ToTemporalTime(cx, args[0], &isoDateTime.time)) {
     return false;
   }
 }

 // Step 4. (Moved above)

 // Step 5.
 auto* obj = CreateTemporalDateTime(cx, isoDateTime, calendar);
 if (!obj) {
   return false;
 }

 args.rval().setObject(*obj);
 return true;
}

/**
* Temporal.PlainDate.prototype.toPlainDateTime ( [ temporalTime ] )
*/
static bool PlainDate_toPlainDateTime(JSContext* cx, unsigned argc, Value* vp) {
 // Steps 1-2.
 CallArgs args = CallArgsFromVp(argc, vp);
 return CallNonGenericMethod<IsPlainDate, PlainDate_toPlainDateTime>(cx, args);
}

/**
* Temporal.PlainDate.prototype.add ( temporalDurationLike [ , options ] )
*/
static bool PlainDate_add(JSContext* cx, const CallArgs& args) {
 // Step 3.
 return AddDurationToDate(cx, TemporalAddDuration::Add, args);
}

/**
* Temporal.PlainDate.prototype.add ( temporalDurationLike [ , options ] )
*/
static bool PlainDate_add(JSContext* cx, unsigned argc, Value* vp) {
 // Steps 1-2.
 CallArgs args = CallArgsFromVp(argc, vp);
 return CallNonGenericMethod<IsPlainDate, PlainDate_add>(cx, args);
}

/**
* Temporal.PlainDate.prototype.subtract ( temporalDurationLike [ , options ] )
*/
static bool PlainDate_subtract(JSContext* cx, const CallArgs& args) {
 // Step 3.
 return AddDurationToDate(cx, TemporalAddDuration::Subtract, args);
}

/**
* Temporal.PlainDate.prototype.subtract ( temporalDurationLike [ , options ] )
*/
static bool PlainDate_subtract(JSContext* cx, unsigned argc, Value* vp) {
 // Steps 1-2.
 CallArgs args = CallArgsFromVp(argc, vp);
 return CallNonGenericMethod<IsPlainDate, PlainDate_subtract>(cx, args);
}

/**
* Temporal.PlainDate.prototype.with ( temporalDateLike [ , options ] )
*/
static bool PlainDate_with(JSContext* cx, const CallArgs& args) {
 Rooted<PlainDate> temporalDate(
     cx, &args.thisv().toObject().as<PlainDateObject>());

 // Step 3.
 Rooted<JSObject*> temporalDateLike(
     cx, RequireObjectArg(cx, "temporalDateLike", "with", args.get(0)));
 if (!temporalDateLike) {
   return false;
 }
 if (!ThrowIfTemporalLikeObject(cx, temporalDateLike)) {
   return false;
 }

 // Step 4.
 auto calendar = temporalDate.calendar();

 // Step 5.
 Rooted<CalendarFields> fields(cx);
 if (!ISODateToFields(cx, temporalDate, &fields)) {
   return false;
 }

 // Step 6.
 Rooted<CalendarFields> partialDate(cx);
 if (!PreparePartialCalendarFields(cx, calendar, temporalDateLike,
                                   {
                                       CalendarField::Year,
                                       CalendarField::Month,
                                       CalendarField::MonthCode,
                                       CalendarField::Day,
                                   },
                                   &partialDate)) {
   return false;
 }
 MOZ_ASSERT(!partialDate.keys().isEmpty());

 // Step 7.
 fields = CalendarMergeFields(calendar, fields, partialDate);

 // Steps 8-9.
 auto overflow = TemporalOverflow::Constrain;
 if (args.hasDefined(1)) {
   // Step 8.
   Rooted<JSObject*> options(cx,
                             RequireObjectArg(cx, "options", "with", args[1]));
   if (!options) {
     return false;
   }

   // Step 9.
   if (!GetTemporalOverflowOption(cx, options, &overflow)) {
     return false;
   }
 }

 // Step 10.
 Rooted<PlainDate> date(cx);
 if (!CalendarDateFromFields(cx, calendar, fields, overflow, &date)) {
   return false;
 }

 // Step 11.
 auto* result = CreateTemporalDate(cx, date);
 if (!result) {
   return false;
 }

 args.rval().setObject(*result);
 return true;
}

/**
* Temporal.PlainDate.prototype.with ( temporalDateLike [ , options ] )
*/
static bool PlainDate_with(JSContext* cx, unsigned argc, Value* vp) {
 // Steps 1-2.
 CallArgs args = CallArgsFromVp(argc, vp);
 return CallNonGenericMethod<IsPlainDate, PlainDate_with>(cx, args);
}

/**
* Temporal.PlainDate.prototype.withCalendar ( calendar )
*/
static bool PlainDate_withCalendar(JSContext* cx, const CallArgs& args) {
 auto* temporalDate = &args.thisv().toObject().as<PlainDateObject>();
 auto date = temporalDate->date();

 // Step 3.
 Rooted<CalendarValue> calendar(cx);
 if (!ToTemporalCalendar(cx, args.get(0), &calendar)) {
   return false;
 }

 // Step 4.
 auto* result = CreateTemporalDate(cx, date, calendar);
 if (!result) {
   return false;
 }

 args.rval().setObject(*result);
 return true;
}

/**
* Temporal.PlainDate.prototype.withCalendar ( calendar )
*/
static bool PlainDate_withCalendar(JSContext* cx, unsigned argc, Value* vp) {
 // Steps 1-2.
 CallArgs args = CallArgsFromVp(argc, vp);
 return CallNonGenericMethod<IsPlainDate, PlainDate_withCalendar>(cx, args);
}

/**
* Temporal.PlainDate.prototype.until ( other [ , options ] )
*/
static bool PlainDate_until(JSContext* cx, const CallArgs& args) {
 // Step 3.
 return DifferenceTemporalPlainDate(cx, TemporalDifference::Until, args);
}

/**
* Temporal.PlainDate.prototype.until ( other [ , options ] )
*/
static bool PlainDate_until(JSContext* cx, unsigned argc, Value* vp) {
 // Steps 1-2.
 CallArgs args = CallArgsFromVp(argc, vp);
 return CallNonGenericMethod<IsPlainDate, PlainDate_until>(cx, args);
}

/**
* Temporal.PlainDate.prototype.since ( other [ , options ] )
*/
static bool PlainDate_since(JSContext* cx, const CallArgs& args) {
 // Step 3.
 return DifferenceTemporalPlainDate(cx, TemporalDifference::Since, args);
}

/**
* Temporal.PlainDate.prototype.since ( other [ , options ] )
*/
static bool PlainDate_since(JSContext* cx, unsigned argc, Value* vp) {
 // Steps 1-2.
 CallArgs args = CallArgsFromVp(argc, vp);
 return CallNonGenericMethod<IsPlainDate, PlainDate_since>(cx, args);
}

/**
* Temporal.PlainDate.prototype.equals ( other )
*/
static bool PlainDate_equals(JSContext* cx, const CallArgs& args) {
 auto* temporalDate = &args.thisv().toObject().as<PlainDateObject>();
 auto date = temporalDate->date();
 Rooted<CalendarValue> calendar(cx, temporalDate->calendar());

 // Step 3.
 Rooted<PlainDate> other(cx);
 if (!ToTemporalDate(cx, args.get(0), &other)) {
   return false;
 }

 // Steps 4-5.
 bool equals =
     date == other.date() && CalendarEquals(calendar, other.calendar());

 args.rval().setBoolean(equals);
 return true;
}

/**
* Temporal.PlainDate.prototype.equals ( other )
*/
static bool PlainDate_equals(JSContext* cx, unsigned argc, Value* vp) {
 // Steps 1-2.
 CallArgs args = CallArgsFromVp(argc, vp);
 return CallNonGenericMethod<IsPlainDate, PlainDate_equals>(cx, args);
}

/**
* Temporal.PlainDate.prototype.toZonedDateTime ( item )
*
* The |item| argument represents either a time zone or an options object. The
* following cases are supported:
* - |item| is an options object with `timeZone` and `plainTime` properties.
* - |item| is a time zone identifier string.
*/
static bool PlainDate_toZonedDateTime(JSContext* cx, const CallArgs& args) {
 auto* temporalDate = &args.thisv().toObject().as<PlainDateObject>();
 auto date = temporalDate->date();
 Rooted<CalendarValue> calendar(cx, temporalDate->calendar());

 // Steps 3-4
 Rooted<TimeZoneValue> timeZone(cx);
 Rooted<Value> temporalTime(cx);
 if (args.get(0).isObject()) {
   Rooted<JSObject*> item(cx, &args[0].toObject());

   // Step 3.a.
   Rooted<Value> timeZoneLike(cx);
   if (!GetProperty(cx, item, item, cx->names().timeZone, &timeZoneLike)) {
     return false;
   }

   // Steps 3.b-c.
   if (timeZoneLike.isUndefined()) {
     // Step 3.b.i.
     if (!ToTemporalTimeZone(cx, args[0], &timeZone)) {
       return false;
     }

     // Step 3.b.ii.
     MOZ_ASSERT(temporalTime.isUndefined());
   } else {
     // Step 3.c.i.
     if (!ToTemporalTimeZone(cx, timeZoneLike, &timeZone)) {
       return false;
     }

     // Step 3.c.ii.
     if (!GetProperty(cx, item, item, cx->names().plainTime, &temporalTime)) {
       return false;
     }
   }
 } else {
   // Step 4.a.
   if (!ToTemporalTimeZone(cx, args.get(0), &timeZone)) {
     return false;
   }

   // Step 4.b.
   MOZ_ASSERT(temporalTime.isUndefined());
 }

 // Steps 5-6.
 EpochNanoseconds epochNs;
 if (temporalTime.isUndefined()) {
   // Step 5.a.
   if (!GetStartOfDay(cx, timeZone, date, &epochNs)) {
     return false;
   }
 } else {
   // Step 6.a.
   Time time;
   if (!ToTemporalTime(cx, temporalTime, &time)) {
     return false;
   }

   // Step 6.b.
   auto isoDateTime = ISODateTime{date, time};

   // Step 6.c.
   if (!ISODateTimeWithinLimits(isoDateTime)) {
     JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr,
                               JSMSG_TEMPORAL_PLAIN_DATE_TIME_INVALID);
     return false;
   }

   // Step 6.d.
   if (!GetEpochNanosecondsFor(cx, timeZone, isoDateTime,
                               TemporalDisambiguation::Compatible, &epochNs)) {
     return false;
   }
 }

 // Step 7.
 auto* result = CreateTemporalZonedDateTime(cx, epochNs, timeZone, calendar);
 if (!result) {
   return false;
 }

 args.rval().setObject(*result);
 return true;
}

/**
* Temporal.PlainDate.prototype.toZonedDateTime ( item )
*/
static bool PlainDate_toZonedDateTime(JSContext* cx, unsigned argc, Value* vp) {
 // Steps 1-2.
 CallArgs args = CallArgsFromVp(argc, vp);
 return CallNonGenericMethod<IsPlainDate, PlainDate_toZonedDateTime>(cx, args);
}

/**
* Temporal.PlainDate.prototype.toString ( [ options ] )
*/
static bool PlainDate_toString(JSContext* cx, const CallArgs& args) {
 Rooted<PlainDateObject*> temporalDate(
     cx, &args.thisv().toObject().as<PlainDateObject>());

 auto showCalendar = ShowCalendar::Auto;
 if (args.hasDefined(0)) {
   // Step 3.
   Rooted<JSObject*> options(
       cx, RequireObjectArg(cx, "options", "toString", args[0]));
   if (!options) {
     return false;
   }

   // Step 4.
   if (!GetTemporalShowCalendarNameOption(cx, options, &showCalendar)) {
     return false;
   }
 }

 // Step 5.
 JSString* str = TemporalDateToString(cx, temporalDate, showCalendar);
 if (!str) {
   return false;
 }

 args.rval().setString(str);
 return true;
}

/**
* Temporal.PlainDate.prototype.toString ( [ options ] )
*/
static bool PlainDate_toString(JSContext* cx, unsigned argc, Value* vp) {
 // Steps 1-2.
 CallArgs args = CallArgsFromVp(argc, vp);
 return CallNonGenericMethod<IsPlainDate, PlainDate_toString>(cx, args);
}

/**
* Temporal.PlainDate.prototype.toLocaleString ( [ locales [ , options ] ] )
*/
static bool PlainDate_toLocaleString(JSContext* cx, const CallArgs& args) {
 // Steps 3-4.
 return intl::TemporalObjectToLocaleString(cx, args,
                                           intl::DateTimeFormatKind::Date);
}

/**
* Temporal.PlainDate.prototype.toLocaleString ( [ locales [ , options ] ] )
*/
static bool PlainDate_toLocaleString(JSContext* cx, unsigned argc, Value* vp) {
 // Steps 1-2.
 CallArgs args = CallArgsFromVp(argc, vp);
 return CallNonGenericMethod<IsPlainDate, PlainDate_toLocaleString>(cx, args);
}

/**
* Temporal.PlainDate.prototype.toJSON ( )
*/
static bool PlainDate_toJSON(JSContext* cx, const CallArgs& args) {
 Rooted<PlainDateObject*> temporalDate(
     cx, &args.thisv().toObject().as<PlainDateObject>());

 // Step 3.
 JSString* str = TemporalDateToString(cx, temporalDate, ShowCalendar::Auto);
 if (!str) {
   return false;
 }

 args.rval().setString(str);
 return true;
}

/**
* Temporal.PlainDate.prototype.toJSON ( )
*/
static bool PlainDate_toJSON(JSContext* cx, unsigned argc, Value* vp) {
 // Steps 1-2.
 CallArgs args = CallArgsFromVp(argc, vp);
 return CallNonGenericMethod<IsPlainDate, PlainDate_toJSON>(cx, args);
}

/**
*  Temporal.PlainDate.prototype.valueOf ( )
*/
static bool PlainDate_valueOf(JSContext* cx, unsigned argc, Value* vp) {
 JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_CANT_CONVERT_TO,
                           "PlainDate", "primitive type");
 return false;
}

const JSClass PlainDateObject::class_ = {
   "Temporal.PlainDate",
   JSCLASS_HAS_RESERVED_SLOTS(PlainDateObject::SLOT_COUNT) |
       JSCLASS_HAS_CACHED_PROTO(JSProto_PlainDate),
   JS_NULL_CLASS_OPS,
   &PlainDateObject::classSpec_,
};

const JSClass& PlainDateObject::protoClass_ = PlainObject::class_;

static const JSFunctionSpec PlainDate_methods[] = {
   JS_FN("from", PlainDate_from, 1, 0),
   JS_FN("compare", PlainDate_compare, 2, 0),
   JS_FS_END,
};

static const JSFunctionSpec PlainDate_prototype_methods[] = {
   JS_FN("toPlainMonthDay", PlainDate_toPlainMonthDay, 0, 0),
   JS_FN("toPlainYearMonth", PlainDate_toPlainYearMonth, 0, 0),
   JS_FN("toPlainDateTime", PlainDate_toPlainDateTime, 0, 0),
   JS_FN("add", PlainDate_add, 1, 0),
   JS_FN("subtract", PlainDate_subtract, 1, 0),
   JS_FN("with", PlainDate_with, 1, 0),
   JS_FN("withCalendar", PlainDate_withCalendar, 1, 0),
   JS_FN("until", PlainDate_until, 1, 0),
   JS_FN("since", PlainDate_since, 1, 0),
   JS_FN("equals", PlainDate_equals, 1, 0),
   JS_FN("toZonedDateTime", PlainDate_toZonedDateTime, 1, 0),
   JS_FN("toString", PlainDate_toString, 0, 0),
   JS_FN("toLocaleString", PlainDate_toLocaleString, 0, 0),
   JS_FN("toJSON", PlainDate_toJSON, 0, 0),
   JS_FN("valueOf", PlainDate_valueOf, 0, 0),
   JS_FS_END,
};

static const JSPropertySpec PlainDate_prototype_properties[] = {
   JS_PSG("calendarId", PlainDate_calendarId, 0),
   JS_PSG("era", PlainDate_era, 0),
   JS_PSG("eraYear", PlainDate_eraYear, 0),
   JS_PSG("year", PlainDate_year, 0),
   JS_PSG("month", PlainDate_month, 0),
   JS_PSG("monthCode", PlainDate_monthCode, 0),
   JS_PSG("day", PlainDate_day, 0),
   JS_PSG("dayOfWeek", PlainDate_dayOfWeek, 0),
   JS_PSG("dayOfYear", PlainDate_dayOfYear, 0),
   JS_PSG("weekOfYear", PlainDate_weekOfYear, 0),
   JS_PSG("yearOfWeek", PlainDate_yearOfWeek, 0),
   JS_PSG("daysInWeek", PlainDate_daysInWeek, 0),
   JS_PSG("daysInMonth", PlainDate_daysInMonth, 0),
   JS_PSG("daysInYear", PlainDate_daysInYear, 0),
   JS_PSG("monthsInYear", PlainDate_monthsInYear, 0),
   JS_PSG("inLeapYear", PlainDate_inLeapYear, 0),
   JS_STRING_SYM_PS(toStringTag, "Temporal.PlainDate", JSPROP_READONLY),
   JS_PS_END,
};

const ClassSpec PlainDateObject::classSpec_ = {
   GenericCreateConstructor<PlainDateConstructor, 3, gc::AllocKind::FUNCTION>,
   GenericCreatePrototype<PlainDateObject>,
   PlainDate_methods,
   nullptr,
   PlainDate_prototype_methods,
   PlainDate_prototype_properties,
   nullptr,
   ClassSpec::DontDefineConstructor,
};