PARENTH_POSN
flags |= (SIGN_POSN_USED|PARENTH_POSN);
*sign_posn = (flags & PARENTH_POSN) ? 0 : lc->int_n_sign_posn;
*sign_posn = (flags & PARENTH_POSN) ? 0 : lc->int_p_sign_posn;
*sign_posn = (flags & PARENTH_POSN) ? 0 : lc->n_sign_posn;
*sign_posn = (flags & PARENTH_POSN) ? 0 : lc->p_sign_posn;