183     // 16. Let fallback be ? GetOption(options, "fallback", "string", « "code", "none" », "code").  in InitializeDisplayNames()
186 …                                                      {FallbackOption::CODE, FallbackOption::NONE},  in InitializeDisplayNames()
187 …                                                           {"code", "none"}, FallbackOption::CODE);  in InitializeDisplayNames()
228 // CanonicalCodeForDisplayNames ( type, code )
232                                                                   const JSHandle<EcmaString> &code)  in CanonicalCodeForDisplayNames()  argument
235 …     // a. If code does not match the unicode_language_id production, throw a RangeError exception.  in CanonicalCodeForDisplayNames()
237         std::string codeSt = JSLocale::ConvertToStdString(code);  in CanonicalCodeForDisplayNames()
241             THROW_TYPE_ERROR_AND_RETURN(thread, "not match the language id", code);  in CanonicalCodeForDisplayNames()
244             THROW_TYPE_ERROR_AND_RETURN(thread, "not match the unicode_language_id", code);  in CanonicalCodeForDisplayNames()
246         // b. If IsStructurallyValidLanguageTag(code) is false, throw a RangeError exception.  in CanonicalCodeForDisplayNames()
247         // c. Set code to CanonicalizeUnicodeLocaleId(code).  in CanonicalCodeForDisplayNames()
248         // d. Return code.  in CanonicalCodeForDisplayNames()
249         if (!JSLocale::IsStructurallyValidLanguageTag(code)) {  in CanonicalCodeForDisplayNames()
250             THROW_TYPE_ERROR_AND_RETURN(thread, "not a structurally valid", code);  in CanonicalCodeForDisplayNames()
252         JSHandle<EcmaString> codeStr = JSLocale::CanonicalizeUnicodeLocaleId(thread, code);  in CanonicalCodeForDisplayNames()
260 …   // a. If code does not match the unicode_region_subtag production, throw a RangeError exception.  in CanonicalCodeForDisplayNames()
261         std::string regionCode = JSLocale::ConvertToStdString(code);  in CanonicalCodeForDisplayNames()
263             THROW_RANGE_ERROR_AND_RETURN(thread, "invalid region", code);  in CanonicalCodeForDisplayNames()
265         // b. Let code be the result of mapping code to upper case as described in 6.1.  in CanonicalCodeForDisplayNames()
266         // c. Return code.  in CanonicalCodeForDisplayNames()
273         std::string scriptCode = JSLocale::ConvertToStdString(code);  in CanonicalCodeForDisplayNames()
275             THROW_RANGE_ERROR_AND_RETURN(thread, "invalid script", code);  in CanonicalCodeForDisplayNames()
284     // 5. If ! IsWellFormedCurrencyCode(code) is false, throw a RangeError exception.  in CanonicalCodeForDisplayNames()
286     std::string cCode = JSLocale::ConvertToStdString(code);  in CanonicalCodeForDisplayNames()
288         THROW_RANGE_ERROR_AND_RETURN(thread, "not a wellformed currency code", code);  in CanonicalCodeForDisplayNames()
351         case FallbackOption::CODE:  in FallbackOptionToEcmaString()