code: def p_declarray(self, p):
          'declname : ID length'
          p[0] = (p[1], p[2])
          p.set_lineno(0, p.lineno(1)f p_declarray(self, p):
          'declname : ID length'
          p[0] = (p[1], p[2])
          p.set_lineno(0, p.lineno(1))
docs: declname : ID length