sclass CharRange {
  char start, end;
  
  *() {}
  *(char *start, char *end) {}
  *(CharRange r) { start = r.start; end = r.end; }
  
  [stdEq]
  
  final int length() { ret end-start+1; }

  sS _fieldOrder = "start end";
  
  toString { ret "[" + start + ";" + end + "]"; }
}