Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1008 insertions, 0 deletions

diff --git a/js/src/builtin/intl/DateTimeFormat.js b/js/src/builtin/intl/DateTimeFormat.js
new file mode 100644
index 0000000000..c3c14ebfc2
--- /dev/null
+++ b/js/src/builtin/intl/DateTimeFormat.js
@@ -0,0 +1,1008 @@
+/* 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/. */
+
+/* Portions Copyright Norbert Lindenberg 2011-2012. */
+
+/**
+ * Compute an internal properties object from |lazyDateTimeFormatData|.
+ */
+function resolveDateTimeFormatInternals(lazyDateTimeFormatData) {
+  assert(IsObject(lazyDateTimeFormatData), "lazy data not an object?");
+
+  // Lazy DateTimeFormat data has the following structure:
+  //
+  //   {
+  //     requestedLocales: List of locales,
+  //
+  //     localeOpt: // *first* opt computed in InitializeDateTimeFormat
+  //       {
+  //         localeMatcher: "lookup" / "best fit",
+  //
+  //         ca: string matching a Unicode extension type, // optional
+  //
+  //         nu: string matching a Unicode extension type, // optional
+  //
+  //         hc: "h11" / "h12" / "h23" / "h24", // optional
+  //       }
+  //
+  //     timeZone: IANA time zone name,
+  //
+  //     formatOpt: // *second* opt computed in InitializeDateTimeFormat
+  //       {
+  //         // all the properties/values listed in Table 3
+  //         // (weekday, era, year, month, day, &c.)
+  //
+  //         hour12: true / false,  // optional
+  //       }
+  //
+  //     formatMatcher: "basic" / "best fit",
+  //
+  //     dateStyle: "full" / "long" / "medium" / "short" / undefined,
+  //
+  //     timeStyle: "full" / "long" / "medium" / "short" / undefined,
+  //
+  //     patternOption:
+  //       String representing LDML Date Format pattern or undefined
+  //   }
+  //
+  // Note that lazy data is only installed as a final step of initialization,
+  // so every DateTimeFormat lazy data object has *all* these properties,
+  // never a subset of them.
+
+  var internalProps = std_Object_create(null);
+
+  var DateTimeFormat = dateTimeFormatInternalProperties;
+
+  // Compute effective locale.
+
+  // Step 10.
+  var localeData = DateTimeFormat.localeData;
+
+  // Step 11.
+  var r = ResolveLocale(
+    "DateTimeFormat",
+    lazyDateTimeFormatData.requestedLocales,
+    lazyDateTimeFormatData.localeOpt,
+    DateTimeFormat.relevantExtensionKeys,
+    localeData
+  );
+
+  // Steps 12-13, 15.
+  internalProps.locale = r.locale;
+  internalProps.calendar = r.ca;
+  internalProps.numberingSystem = r.nu;
+
+  // Step 20.
+  internalProps.timeZone = lazyDateTimeFormatData.timeZone;
+
+  // Step 21.
+  var formatOpt = lazyDateTimeFormatData.formatOpt;
+
+  // Step 14.
+  // Copy the hourCycle setting, if present, to the format options. But
+  // only do this if no hour12 option is present, because the latter takes
+  // precedence over hourCycle.
+  if (r.hc !== null && formatOpt.hour12 === undefined) {
+    formatOpt.hourCycle = r.hc;
+  }
+
+  // Steps 26-31, more or less - see comment after this function.
+  if (lazyDateTimeFormatData.patternOption !== undefined) {
+    internalProps.pattern = lazyDateTimeFormatData.patternOption;
+  } else if (
+    lazyDateTimeFormatData.dateStyle !== undefined ||
+    lazyDateTimeFormatData.timeStyle !== undefined
+  ) {
+    internalProps.hourCycle = formatOpt.hourCycle;
+    internalProps.hour12 = formatOpt.hour12;
+    internalProps.dateStyle = lazyDateTimeFormatData.dateStyle;
+    internalProps.timeStyle = lazyDateTimeFormatData.timeStyle;
+  } else {
+    internalProps.hourCycle = formatOpt.hourCycle;
+    internalProps.hour12 = formatOpt.hour12;
+    internalProps.weekday = formatOpt.weekday;
+    internalProps.era = formatOpt.era;
+    internalProps.year = formatOpt.year;
+    internalProps.month = formatOpt.month;
+    internalProps.day = formatOpt.day;
+    internalProps.dayPeriod = formatOpt.dayPeriod;
+    internalProps.hour = formatOpt.hour;
+    internalProps.minute = formatOpt.minute;
+    internalProps.second = formatOpt.second;
+    internalProps.fractionalSecondDigits = formatOpt.fractionalSecondDigits;
+    internalProps.timeZoneName = formatOpt.timeZoneName;
+  }
+
+  // The caller is responsible for associating |internalProps| with the right
+  // object using |setInternalProperties|.
+  return internalProps;
+}
+
+/**
+ * Returns an object containing the DateTimeFormat internal properties of |obj|.
+ */
+function getDateTimeFormatInternals(obj) {
+  assert(IsObject(obj), "getDateTimeFormatInternals called with non-object");
+  assert(
+    intl_GuardToDateTimeFormat(obj) !== null,
+    "getDateTimeFormatInternals called with non-DateTimeFormat"
+  );
+
+  var internals = getIntlObjectInternals(obj);
+  assert(
+    internals.type === "DateTimeFormat",
+    "bad type escaped getIntlObjectInternals"
+  );
+
+  // If internal properties have already been computed, use them.
+  var internalProps = maybeInternalProperties(internals);
+  if (internalProps) {
+    return internalProps;
+  }
+
+  // Otherwise it's time to fully create them.
+  internalProps = resolveDateTimeFormatInternals(internals.lazyData);
+  setInternalProperties(internals, internalProps);
+  return internalProps;
+}
+
+/**
+ * 12.1.10 UnwrapDateTimeFormat( dtf )
+ */
+function UnwrapDateTimeFormat(dtf) {
+  // Steps 2 and 4 (error handling moved to caller).
+  if (
+    IsObject(dtf) &&
+    intl_GuardToDateTimeFormat(dtf) === null &&
+    !intl_IsWrappedDateTimeFormat(dtf) &&
+    callFunction(
+      std_Object_isPrototypeOf,
+      GetBuiltinPrototype("DateTimeFormat"),
+      dtf
+    )
+  ) {
+    dtf = dtf[intlFallbackSymbol()];
+  }
+  return dtf;
+}
+
+/**
+ * 6.4.2 CanonicalizeTimeZoneName ( timeZone )
+ *
+ * Canonicalizes the given IANA time zone name.
+ *
+ * ES2017 Intl draft rev 4a23f407336d382ed5e3471200c690c9b020b5f3
+ */
+function CanonicalizeTimeZoneName(timeZone) {
+  assert(typeof timeZone === "string", "CanonicalizeTimeZoneName");
+
+  // Step 1. (Not applicable, the input is already a valid IANA time zone.)
+  assert(timeZone !== "Etc/Unknown", "Invalid time zone");
+  assert(
+    timeZone === intl_IsValidTimeZoneName(timeZone),
+    "Time zone name not normalized"
+  );
+
+  // Step 2.
+  var ianaTimeZone = intl_canonicalizeTimeZone(timeZone);
+  assert(ianaTimeZone !== "Etc/Unknown", "Invalid canonical time zone");
+  assert(
+    ianaTimeZone === intl_IsValidTimeZoneName(ianaTimeZone),
+    "Unsupported canonical time zone"
+  );
+
+  // Step 3.
+  if (ianaTimeZone === "Etc/UTC" || ianaTimeZone === "Etc/GMT") {
+    ianaTimeZone = "UTC";
+  }
+
+  // Step 4.
+  return ianaTimeZone;
+}
+
+var timeZoneCache = {
+  icuDefaultTimeZone: undefined,
+  defaultTimeZone: undefined,
+};
+
+/**
+ * 6.4.3 DefaultTimeZone ()
+ *
+ * Returns the IANA time zone name for the host environment's current time zone.
+ *
+ * ES2017 Intl draft rev 4a23f407336d382ed5e3471200c690c9b020b5f3
+ */
+function DefaultTimeZone() {
+  if (intl_isDefaultTimeZone(timeZoneCache.icuDefaultTimeZone)) {
+    return timeZoneCache.defaultTimeZone;
+  }
+
+  // Verify that the current ICU time zone is a valid ECMA-402 time zone.
+  var icuDefaultTimeZone = intl_defaultTimeZone();
+  var timeZone = intl_IsValidTimeZoneName(icuDefaultTimeZone);
+  if (timeZone === null) {
+    // Before defaulting to "UTC", try to represent the default time zone
+    // using the Etc/GMT + offset format. This format only accepts full
+    // hour offsets.
+    const msPerHour = 60 * 60 * 1000;
+    var offset = intl_defaultTimeZoneOffset();
+    assert(
+      offset === (offset | 0),
+      "milliseconds offset shouldn't be able to exceed int32_t range"
+    );
+    var offsetHours = offset / msPerHour;
+    var offsetHoursFraction = offset % msPerHour;
+    if (offsetHoursFraction === 0) {
+      // Etc/GMT + offset uses POSIX-style signs, i.e. a positive offset
+      // means a location west of GMT.
+      timeZone =
+        "Etc/GMT" + (offsetHours < 0 ? "+" : "-") + std_Math_abs(offsetHours);
+
+      // Check if the fallback is valid.
+      timeZone = intl_IsValidTimeZoneName(timeZone);
+    }
+
+    // Fallback to "UTC" if everything else fails.
+    if (timeZone === null) {
+      timeZone = "UTC";
+    }
+  }
+
+  // Canonicalize the ICU time zone, e.g. change Etc/UTC to UTC.
+  var defaultTimeZone = CanonicalizeTimeZoneName(timeZone);
+
+  timeZoneCache.defaultTimeZone = defaultTimeZone;
+  timeZoneCache.icuDefaultTimeZone = icuDefaultTimeZone;
+
+  return defaultTimeZone;
+}
+
+/**
+ * Initializes an object as a DateTimeFormat.
+ *
+ * This method is complicated a moderate bit by its implementing initialization
+ * as a *lazy* concept.  Everything that must happen now, does -- but we defer
+ * all the work we can until the object is actually used as a DateTimeFormat.
+ * This later work occurs in |resolveDateTimeFormatInternals|; steps not noted
+ * here occur there.
+ *
+ * Spec: ECMAScript Internationalization API Specification, 12.1.1.
+ */
+function InitializeDateTimeFormat(
+  dateTimeFormat,
+  thisValue,
+  locales,
+  options,
+  mozExtensions
+) {
+  assert(
+    IsObject(dateTimeFormat),
+    "InitializeDateTimeFormat called with non-Object"
+  );
+  assert(
+    intl_GuardToDateTimeFormat(dateTimeFormat) !== null,
+    "InitializeDateTimeFormat called with non-DateTimeFormat"
+  );
+
+  // Lazy DateTimeFormat data has the following structure:
+  //
+  //   {
+  //     requestedLocales: List of locales,
+  //
+  //     localeOpt: // *first* opt computed in InitializeDateTimeFormat
+  //       {
+  //         localeMatcher: "lookup" / "best fit",
+  //
+  //         ca: string matching a Unicode extension type, // optional
+  //
+  //         nu: string matching a Unicode extension type, // optional
+  //
+  //         hc: "h11" / "h12" / "h23" / "h24", // optional
+  //       }
+  //
+  //     timeZone: IANA time zone name,
+  //
+  //     formatOpt: // *second* opt computed in InitializeDateTimeFormat
+  //       {
+  //         // all the properties/values listed in Table 3
+  //         // (weekday, era, year, month, day, &c.)
+  //
+  //         hour12: true / false,  // optional
+  //       }
+  //
+  //     formatMatcher: "basic" / "best fit",
+  //   }
+  //
+  // Note that lazy data is only installed as a final step of initialization,
+  // so every DateTimeFormat lazy data object has *all* these properties,
+  // never a subset of them.
+  var lazyDateTimeFormatData = std_Object_create(null);
+
+  // Step 1.
+  var requestedLocales = CanonicalizeLocaleList(locales);
+  lazyDateTimeFormatData.requestedLocales = requestedLocales;
+
+  // Step 2.
+  options = ToDateTimeOptions(options, "any", "date");
+
+  // Compute options that impact interpretation of locale.
+  // Step 3.
+  var localeOpt = new_Record();
+  lazyDateTimeFormatData.localeOpt = localeOpt;
+
+  // Steps 4-5.
+  var localeMatcher = GetOption(
+    options,
+    "localeMatcher",
+    "string",
+    ["lookup", "best fit"],
+    "best fit"
+  );
+  localeOpt.localeMatcher = localeMatcher;
+
+  var calendar = GetOption(options, "calendar", "string", undefined, undefined);
+
+  if (calendar !== undefined) {
+    calendar = intl_ValidateAndCanonicalizeUnicodeExtensionType(
+      calendar,
+      "calendar",
+      "ca"
+    );
+  }
+
+  localeOpt.ca = calendar;
+
+  var numberingSystem = GetOption(
+    options,
+    "numberingSystem",
+    "string",
+    undefined,
+    undefined
+  );
+
+  if (numberingSystem !== undefined) {
+    numberingSystem = intl_ValidateAndCanonicalizeUnicodeExtensionType(
+      numberingSystem,
+      "numberingSystem",
+      "nu"
+    );
+  }
+
+  localeOpt.nu = numberingSystem;
+
+  // Step 6.
+  var hr12 = GetOption(options, "hour12", "boolean", undefined, undefined);
+
+  // Step 7.
+  var hc = GetOption(
+    options,
+    "hourCycle",
+    "string",
+    ["h11", "h12", "h23", "h24"],
+    undefined
+  );
+
+  // Step 8.
+  if (hr12 !== undefined) {
+    // The "hourCycle" option is ignored if "hr12" is also present.
+    hc = null;
+  }
+
+  // Step 9.
+  localeOpt.hc = hc;
+
+  // Steps 10-16 (see resolveDateTimeFormatInternals).
+
+  // Steps 17-20.
+  var tz = options.timeZone;
+  if (tz !== undefined) {
+    // Step 18.a.
+    tz = ToString(tz);
+
+    // Step 18.b.
+    var timeZone = intl_IsValidTimeZoneName(tz);
+    if (timeZone === null) {
+      ThrowRangeError(JSMSG_INVALID_TIME_ZONE, tz);
+    }
+
+    // Step 18.c.
+    tz = CanonicalizeTimeZoneName(timeZone);
+  } else {
+    // Step 19.
+    tz = DefaultTimeZone();
+  }
+  lazyDateTimeFormatData.timeZone = tz;
+
+  // Step 21.
+  var formatOpt = new_Record();
+  lazyDateTimeFormatData.formatOpt = formatOpt;
+
+  if (mozExtensions) {
+    let pattern = GetOption(options, "pattern", "string", undefined, undefined);
+    lazyDateTimeFormatData.patternOption = pattern;
+  }
+
+  // Step 22.
+  // 12.1, Table 5: Components of date and time formats.
+  formatOpt.weekday = GetOption(
+    options,
+    "weekday",
+    "string",
+    ["narrow", "short", "long"],
+    undefined
+  );
+  formatOpt.era = GetOption(
+    options,
+    "era",
+    "string",
+    ["narrow", "short", "long"],
+    undefined
+  );
+  formatOpt.year = GetOption(
+    options,
+    "year",
+    "string",
+    ["2-digit", "numeric"],
+    undefined
+  );
+  formatOpt.month = GetOption(
+    options,
+    "month",
+    "string",
+    ["2-digit", "numeric", "narrow", "short", "long"],
+    undefined
+  );
+  formatOpt.day = GetOption(
+    options,
+    "day",
+    "string",
+    ["2-digit", "numeric"],
+    undefined
+  );
+  formatOpt.dayPeriod = GetOption(
+    options,
+    "dayPeriod",
+    "string",
+    ["narrow", "short", "long"],
+    undefined
+  );
+  formatOpt.hour = GetOption(
+    options,
+    "hour",
+    "string",
+    ["2-digit", "numeric"],
+    undefined
+  );
+  formatOpt.minute = GetOption(
+    options,
+    "minute",
+    "string",
+    ["2-digit", "numeric"],
+    undefined
+  );
+  formatOpt.second = GetOption(
+    options,
+    "second",
+    "string",
+    ["2-digit", "numeric"],
+    undefined
+  );
+  formatOpt.fractionalSecondDigits = GetNumberOption(
+    options,
+    "fractionalSecondDigits",
+    1,
+    3,
+    undefined
+  );
+  formatOpt.timeZoneName = GetOption(
+    options,
+    "timeZoneName",
+    "string",
+    [
+      "short",
+      "long",
+      "shortOffset",
+      "longOffset",
+      "shortGeneric",
+      "longGeneric",
+    ],
+    undefined
+  );
+
+  // Steps 23-24 provided by ICU - see comment after this function.
+
+  // Step 25.
+  //
+  // For some reason (ICU not exposing enough interface?) we drop the
+  // requested format matcher on the floor after this.  In any case, even if
+  // doing so is justified, we have to do this work here in case it triggers
+  // getters or similar. (bug 852837)
+  var formatMatcher = GetOption(
+    options,
+    "formatMatcher",
+    "string",
+    ["basic", "best fit"],
+    "best fit"
+  );
+  void formatMatcher;
+
+  // "DateTimeFormat dateStyle & timeStyle" propsal
+  // https://github.com/tc39/proposal-intl-datetime-style
+  var dateStyle = GetOption(
+    options,
+    "dateStyle",
+    "string",
+    ["full", "long", "medium", "short"],
+    undefined
+  );
+  lazyDateTimeFormatData.dateStyle = dateStyle;
+
+  var timeStyle = GetOption(
+    options,
+    "timeStyle",
+    "string",
+    ["full", "long", "medium", "short"],
+    undefined
+  );
+  lazyDateTimeFormatData.timeStyle = timeStyle;
+
+  if (dateStyle !== undefined || timeStyle !== undefined) {
+    var optionsList = [
+      "weekday",
+      "era",
+      "year",
+      "month",
+      "day",
+      "dayPeriod",
+      "hour",
+      "minute",
+      "second",
+      "fractionalSecondDigits",
+      "timeZoneName",
+    ];
+
+    for (var i = 0; i < optionsList.length; i++) {
+      var option = optionsList[i];
+      if (formatOpt[option] !== undefined) {
+        ThrowTypeError(
+          JSMSG_INVALID_DATETIME_OPTION,
+          option,
+          dateStyle !== undefined ? "dateStyle" : "timeStyle"
+        );
+      }
+    }
+  }
+
+  // Steps 26-28 provided by ICU, more or less - see comment after this function.
+
+  // Steps 29-30.
+  // Pass hr12 on to ICU.
+  if (hr12 !== undefined) {
+    formatOpt.hour12 = hr12;
+  }
+
+  // Step 32.
+  //
+  // We've done everything that must be done now: mark the lazy data as fully
+  // computed and install it.
+  initializeIntlObject(
+    dateTimeFormat,
+    "DateTimeFormat",
+    lazyDateTimeFormatData
+  );
+
+  // 12.2.1, steps 4-5.
+  if (
+    dateTimeFormat !== thisValue &&
+    callFunction(
+      std_Object_isPrototypeOf,
+      GetBuiltinPrototype("DateTimeFormat"),
+      thisValue
+    )
+  ) {
+    DefineDataProperty(
+      thisValue,
+      intlFallbackSymbol(),
+      dateTimeFormat,
+      ATTR_NONENUMERABLE | ATTR_NONCONFIGURABLE | ATTR_NONWRITABLE
+    );
+
+    return thisValue;
+  }
+
+  // 12.2.1, step 6.
+  return dateTimeFormat;
+}
+
+/**
+ * Returns a new options object that includes the provided options (if any)
+ * and fills in default components if required components are not defined.
+ * Required can be "date", "time", or "any".
+ * Defaults can be "date", "time", or "all".
+ *
+ * Spec: ECMAScript Internationalization API Specification, 12.1.1.
+ */
+function ToDateTimeOptions(options, required, defaults) {
+  assert(typeof required === "string", "ToDateTimeOptions");
+  assert(typeof defaults === "string", "ToDateTimeOptions");
+
+  // Steps 1-2.
+  if (options === undefined) {
+    options = null;
+  } else {
+    options = ToObject(options);
+  }
+  options = std_Object_create(options);
+
+  // Step 3.
+  var needDefaults = true;
+
+  // Step 4.
+  if (required === "date" || required === "any") {
+    if (options.weekday !== undefined) {
+      needDefaults = false;
+    }
+    if (options.year !== undefined) {
+      needDefaults = false;
+    }
+    if (options.month !== undefined) {
+      needDefaults = false;
+    }
+    if (options.day !== undefined) {
+      needDefaults = false;
+    }
+  }
+
+  // Step 5.
+  if (required === "time" || required === "any") {
+    if (options.dayPeriod !== undefined) {
+      needDefaults = false;
+    }
+    if (options.hour !== undefined) {
+      needDefaults = false;
+    }
+    if (options.minute !== undefined) {
+      needDefaults = false;
+    }
+    if (options.second !== undefined) {
+      needDefaults = false;
+    }
+    if (options.fractionalSecondDigits !== undefined) {
+      needDefaults = false;
+    }
+  }
+
+  // "DateTimeFormat dateStyle & timeStyle" propsal
+  // https://github.com/tc39/proposal-intl-datetime-style
+  var dateStyle = options.dateStyle;
+  var timeStyle = options.timeStyle;
+
+  if (dateStyle !== undefined || timeStyle !== undefined) {
+    needDefaults = false;
+  }
+
+  if (required === "date" && timeStyle !== undefined) {
+    ThrowTypeError(
+      JSMSG_INVALID_DATETIME_STYLE,
+      "timeStyle",
+      "toLocaleDateString"
+    );
+  }
+
+  if (required === "time" && dateStyle !== undefined) {
+    ThrowTypeError(
+      JSMSG_INVALID_DATETIME_STYLE,
+      "dateStyle",
+      "toLocaleTimeString"
+    );
+  }
+
+  // Step 6.
+  if (needDefaults && (defaults === "date" || defaults === "all")) {
+    // The specification says to call [[DefineOwnProperty]] with false for
+    // the Throw parameter, while Object.defineProperty uses true. For the
+    // calls here, the difference doesn't matter because we're adding
+    // properties to a new object.
+    DefineDataProperty(options, "year", "numeric");
+    DefineDataProperty(options, "month", "numeric");
+    DefineDataProperty(options, "day", "numeric");
+  }
+
+  // Step 7.
+  if (needDefaults && (defaults === "time" || defaults === "all")) {
+    // See comment for step 7.
+    DefineDataProperty(options, "hour", "numeric");
+    DefineDataProperty(options, "minute", "numeric");
+    DefineDataProperty(options, "second", "numeric");
+  }
+
+  // Step 8.
+  return options;
+}
+
+/**
+ * Returns the subset of the given locale list for which this locale list has a
+ * matching (possibly fallback) locale. Locales appear in the same order in the
+ * returned list as in the input list.
+ *
+ * Spec: ECMAScript Internationalization API Specification, 12.3.2.
+ */
+function Intl_DateTimeFormat_supportedLocalesOf(locales /*, options*/) {
+  var options = ArgumentsLength() > 1 ? GetArgument(1) : undefined;
+
+  // Step 1.
+  var availableLocales = "DateTimeFormat";
+
+  // Step 2.
+  var requestedLocales = CanonicalizeLocaleList(locales);
+
+  // Step 3.
+  return SupportedLocales(availableLocales, requestedLocales, options);
+}
+
+/**
+ * DateTimeFormat internal properties.
+ *
+ * Spec: ECMAScript Internationalization API Specification, 9.1 and 12.3.3.
+ */
+var dateTimeFormatInternalProperties = {
+  localeData: dateTimeFormatLocaleData,
+  relevantExtensionKeys: ["ca", "hc", "nu"],
+};
+
+function dateTimeFormatLocaleData() {
+  return {
+    ca: intl_availableCalendars,
+    nu: getNumberingSystems,
+    hc: () => {
+      return [null, "h11", "h12", "h23", "h24"];
+    },
+    default: {
+      ca: intl_defaultCalendar,
+      nu: intl_numberingSystem,
+      hc: () => {
+        return null;
+      },
+    },
+  };
+}
+
+/**
+ * Create function to be cached and returned by Intl.DateTimeFormat.prototype.format.
+ *
+ * Spec: ECMAScript Internationalization API Specification, 12.1.5.
+ */
+function createDateTimeFormatFormat(dtf) {
+  // This function is not inlined in $Intl_DateTimeFormat_format_get to avoid
+  // creating a call-object on each call to $Intl_DateTimeFormat_format_get.
+  return function(date) {
+    // Step 1 (implicit).
+
+    // Step 2.
+    assert(IsObject(dtf), "dateTimeFormatFormatToBind called with non-Object");
+    assert(
+      intl_GuardToDateTimeFormat(dtf) !== null,
+      "dateTimeFormatFormatToBind called with non-DateTimeFormat"
+    );
+
+    // Steps 3-4.
+    var x = date === undefined ? std_Date_now() : ToNumber(date);
+
+    // Step 5.
+    return intl_FormatDateTime(dtf, x, /* formatToParts = */ false);
+  };
+}
+
+/**
+ * Returns a function bound to this DateTimeFormat that returns a String value
+ * representing the result of calling ToNumber(date) according to the
+ * effective locale and the formatting options of this DateTimeFormat.
+ *
+ * Spec: ECMAScript Internationalization API Specification, 12.4.3.
+ */
+// Uncloned functions with `$` prefix are allocated as extended function
+// to store the original name in `SetCanonicalName`.
+function $Intl_DateTimeFormat_format_get() {
+  // Steps 1-3.
+  var thisArg = UnwrapDateTimeFormat(this);
+  var dtf = thisArg;
+  if (!IsObject(dtf) || (dtf = intl_GuardToDateTimeFormat(dtf)) === null) {
+    return callFunction(
+      intl_CallDateTimeFormatMethodIfWrapped,
+      thisArg,
+      "$Intl_DateTimeFormat_format_get"
+    );
+  }
+
+  var internals = getDateTimeFormatInternals(dtf);
+
+  // Step 4.
+  if (internals.boundFormat === undefined) {
+    // Steps 4.a-c.
+    internals.boundFormat = createDateTimeFormatFormat(dtf);
+  }
+
+  // Step 5.
+  return internals.boundFormat;
+}
+SetCanonicalName($Intl_DateTimeFormat_format_get, "get format");
+
+/**
+ * Intl.DateTimeFormat.prototype.formatToParts ( date )
+ *
+ * Spec: ECMAScript Internationalization API Specification, 12.4.4.
+ */
+function Intl_DateTimeFormat_formatToParts(date) {
+  // Step 1.
+  var dtf = this;
+
+  // Steps 2-3.
+  if (!IsObject(dtf) || (dtf = intl_GuardToDateTimeFormat(dtf)) === null) {
+    return callFunction(
+      intl_CallDateTimeFormatMethodIfWrapped,
+      this,
+      date,
+      "Intl_DateTimeFormat_formatToParts"
+    );
+  }
+
+  // Steps 4-5.
+  var x = date === undefined ? std_Date_now() : ToNumber(date);
+
+  // Ensure the DateTimeFormat internals are resolved.
+  getDateTimeFormatInternals(dtf);
+
+  // Step 6.
+  return intl_FormatDateTime(dtf, x, /* formatToParts = */ true);
+}
+
+/**
+ * Intl.DateTimeFormat.prototype.formatRange ( startDate , endDate )
+ *
+ * Spec: Intl.DateTimeFormat.prototype.formatRange proposal
+ */
+function Intl_DateTimeFormat_formatRange(startDate, endDate) {
+  // Step 1.
+  var dtf = this;
+
+  // Step 2.
+  if (!IsObject(dtf) || (dtf = intl_GuardToDateTimeFormat(dtf)) === null) {
+    return callFunction(
+      intl_CallDateTimeFormatMethodIfWrapped,
+      this,
+      startDate,
+      endDate,
+      "Intl_DateTimeFormat_formatRange"
+    );
+  }
+
+  // Step 3.
+  if (startDate === undefined || endDate === undefined) {
+    ThrowTypeError(
+      JSMSG_UNDEFINED_DATE,
+      startDate === undefined ? "start" : "end",
+      "formatRange"
+    );
+  }
+
+  // Step 4.
+  var x = ToNumber(startDate);
+
+  // Step 5.
+  var y = ToNumber(endDate);
+
+  // Ensure the DateTimeFormat internals are resolved.
+  getDateTimeFormatInternals(dtf);
+
+  // Step 6.
+  return intl_FormatDateTimeRange(dtf, x, y, /* formatToParts = */ false);
+}
+
+/**
+ * Intl.DateTimeFormat.prototype.formatRangeToParts ( startDate , endDate )
+ *
+ * Spec: Intl.DateTimeFormat.prototype.formatRange proposal
+ */
+function Intl_DateTimeFormat_formatRangeToParts(startDate, endDate) {
+  // Step 1.
+  var dtf = this;
+
+  // Step 2.
+  if (!IsObject(dtf) || (dtf = intl_GuardToDateTimeFormat(dtf)) === null) {
+    return callFunction(
+      intl_CallDateTimeFormatMethodIfWrapped,
+      this,
+      startDate,
+      endDate,
+      "Intl_DateTimeFormat_formatRangeToParts"
+    );
+  }
+
+  // Step 3.
+  if (startDate === undefined || endDate === undefined) {
+    ThrowTypeError(
+      JSMSG_UNDEFINED_DATE,
+      startDate === undefined ? "start" : "end",
+      "formatRangeToParts"
+    );
+  }
+
+  // Step 4.
+  var x = ToNumber(startDate);
+
+  // Step 5.
+  var y = ToNumber(endDate);
+
+  // Ensure the DateTimeFormat internals are resolved.
+  getDateTimeFormatInternals(dtf);
+
+  // Step 6.
+  return intl_FormatDateTimeRange(dtf, x, y, /* formatToParts = */ true);
+}
+
+/**
+ * Returns the resolved options for a DateTimeFormat object.
+ *
+ * Spec: ECMAScript Internationalization API Specification, 12.4.5.
+ */
+function Intl_DateTimeFormat_resolvedOptions() {
+  // Steps 1-3.
+  var thisArg = UnwrapDateTimeFormat(this);
+  var dtf = thisArg;
+  if (!IsObject(dtf) || (dtf = intl_GuardToDateTimeFormat(dtf)) === null) {
+    return callFunction(
+      intl_CallDateTimeFormatMethodIfWrapped,
+      thisArg,
+      "Intl_DateTimeFormat_resolvedOptions"
+    );
+  }
+
+  // Ensure the internals are resolved.
+  var internals = getDateTimeFormatInternals(dtf);
+
+  // Steps 4-5.
+  var result = {
+    locale: internals.locale,
+    calendar: internals.calendar,
+    numberingSystem: internals.numberingSystem,
+    timeZone: internals.timeZone,
+  };
+
+  if (internals.pattern !== undefined) {
+    // The raw pattern option is only internal to Mozilla, and not part of the
+    // ECMA-402 API.
+    DefineDataProperty(result, "pattern", internals.pattern);
+  }
+
+  var hasDateStyle = internals.dateStyle !== undefined;
+  var hasTimeStyle = internals.timeStyle !== undefined;
+
+  if (hasDateStyle || hasTimeStyle) {
+    if (hasTimeStyle) {
+      // timeStyle (unlike dateStyle) requires resolving the pattern to
+      // ensure "hourCycle" and "hour12" properties are added to |result|.
+      intl_resolveDateTimeFormatComponents(
+        dtf,
+        result,
+        /* includeDateTimeFields = */ false
+      );
+    }
+    if (hasDateStyle) {
+      DefineDataProperty(result, "dateStyle", internals.dateStyle);
+    }
+    if (hasTimeStyle) {
+      DefineDataProperty(result, "timeStyle", internals.timeStyle);
+    }
+  } else {
+    // Components bag or a (Mozilla-only) raw pattern.
+    intl_resolveDateTimeFormatComponents(
+      dtf,
+      result,
+      /* includeDateTimeFields = */ true
+    );
+  }
+
+  // Step 6.
+  return result;
+}