protected void copy_from(StemmerOperations other)
 {
     current        = other.current;
     cursor         = other.cursor;
     limit          = other.limit;
     limit_backward = other.limit_backward;
     bra            = other.bra;
     ket            = other.ket;
 }
 protected void copy_from(StemmerOperations other)
 {
     current = other.current;
     cursor = other.cursor;
     limit = other.limit;
     limit_backward = other.limit_backward;
     bra = other.bra;
     ket = other.ket;
 }