code: def p_const_expression_floatnum(self, p):
          'const_expression : floatnumber'
          p[0] = FloatConst(p[1], lineno=p.lineno(1))
          p.set_lineno(0, p.lineno(1)f p_const_expression_floatnum(self, p):
          'const_expression : floatnumber'
          p[0] = FloatConst(p[1], lineno=p.lineno(1))
          p.set_lineno(0, p.lineno(1))
docs: const_expression : floatnumber