code: def p_ioport_head_width(self, p):
          'ioport_head : sigtypes width portname'
          p[0] = self.create_ioport(p[1], p[3], width=p[2], lineno=p.lineno(3))
          p.set_lineno(0, p.lineno(1)f p_ioport_head_width(self, p):
          'ioport_head : sigtypes width portname'
          p[0] = self.create_ioport(p[1], p[3], width=p[2], lineno=p.lineno(3))
          p.set_lineno(0, p.lineno(1))
docs: ioport_head : sigtypes width portname