EncodedJSValue JSC_HOST_CALL IntlDateTimeFormatConstructorFuncSupportedLocalesOf(ExecState* state) { // 12.2.2 Intl.DateTimeFormat.supportedLocalesOf(locales [, options]) (ECMA-402 2.0) // 1. Let availableLocales be %DateTimeFormat%.[[availableLocales]]. JSGlobalObject* globalObject = state->callee()->globalObject(); const HashSet<String> availableLocales = globalObject->intlDateTimeFormatAvailableLocales(); // 2. Let requestedLocales be CanonicalizeLocaleList(locales). Vector<String> requestedLocales = canonicalizeLocaleList(*state, state->argument(0)); if (state->hadException()) return JSValue::encode(jsUndefined()); // 3. Return SupportedLocales(availableLocales, requestedLocales, options). return JSValue::encode(supportedLocales(*state, availableLocales, requestedLocales, state->argument(1))); }