* RegexpOptions(kcode:$kcode(, encodingNone)?(, extended)?(, fixed)?(,
* ignorecase)?(, java)?(, kcodeDefault)?(, literal)?(, multiline)?(,
* once)?)
*/
public static RegexpOptions createRegexpOptions(String kcodeString, String[] options) {
KCode kCode = KCode.valueOf(kcodeString);
if (options != null) {
List<String> optionList = new ArrayList<String>(Arrays.asList(options));
boolean isKCodeDefault = false;