duanqujing3863 2019-01-31 12:34
浏览 9
已采纳

如何取消引用动态多级指针?

I was trying to implement a function to print the structure tree of an interface{} with reflection and DFS.

But I find it's hard to get dereference of a multiple level pointer (NumField()can not be used with a pointer). Just like:

func Tree(i interface{}) {
  ......
}

var a = 10
var b = &a
var c = &b

Tree(c)

In my opinion, maybe:

for reflect.ValueOf(i).Kind() == reflect.Ptr {
    t := i.(reflect.Typeof(i))
    i = *t
}

could work, but it doesn't.

Is there any way to resolve this?

  • 写回答

3条回答 默认 最新

  • dopuzf0898 2019-01-31 13:09
    关注

    Using reflection you can do this:

    rt := reflect.ValueOf(i).Type()
    for rt.Kind() == reflect.Ptr {
        rt = rt.Elem()
    }
    
    // rt is non-pointer type
    

    https://play.golang.com/p/YbT1p4R3_1u

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论
查看更多回答(2条)

报告相同问题?

悬赏问题

  • ¥15 wamp3.3.5安装完成后图标正常显示绿色,鼠标左右键点击图标均无反应。求解决方法。
  • ¥15 鼠标点击的这条记录了什么?
  • ¥15 在写pid调速的程序时,电机始终维持最大速度
  • ¥15 请问如何查看手机root记录?
  • ¥15 商城小程序订单号重复
  • ¥15 学校优化算法sbo和蚁群算法怎么结合
  • ¥21 matlab怎么求时域信号的二阶导数
  • ¥15 判断两个表是否完全相同
  • ¥15 java map类型数据格式,如何快速通过前缀匹配元素
  • ¥15 stc12c5a60s2、QMC5883L、LCD1602组合测量磁场所需程序