persistable sclass RegExp {
  S pattern;
  bool caseInsensitive;
  transient Pattern compiled;
  
  *(S *pattern) {}
  *(S *pattern, bool *caseInsensitive) {}
  
  transient simplyCached java.util.regexp.Pattern compile() {
    ret compileRegexpPossiblyIC(pattern, caseInsensitive);
  }
}