code: def p_partselect_pointer(self, p):
          'partselect : pointer LBRACKET expression COLON expression RBRACKET'
          p[0] = Partselect(p[1], p[3], p[5], lineno=p.lineno(1))
          p.set_lineno(0, p.lineno(1)f p_partselect_pointer(self, p):
          'partselect : pointer LBRACKET expression COLON expression RBRACKET'
          p[0] = Partselect(p[1], p[3], p[5], lineno=p.lineno(1))
          p.set_lineno(0, p.lineno(1))
docs: partselect : pointer LBRACKET expression COLON expression RBRACKET