Golang in the Sort Pack sort.search () use tutorial

Sort()when using the function in the sort package
Cannot use c.ring (Type []uint32) as type sort. Interface in argument to sort. Sort:
[]uint32 does not implement sort. Interface (missing Len method)

cannot use c.ring (type []uint32) as type sort.Interface in argument to sort.Sort:        []uint32 does not implement sort.Interface (missing Len method)

The reason is sort. The definition of Sort () is as follows

func Sort(data Interface)

type Interface interface {    // Len方法返回集合中的元素个数    Len() [int](https://studygolang.com/static/pkgdoc/pkg/builtin.htm#int)    // Less方法报告索引i的元素是否比索引j的元素小    Less(i, j [int](https://studygolang.com/static/pkgdoc/pkg/builtin.htm#int)) [bool](https://studygolang.com/static/pkgdoc/pkg/builtin.htm#bool)    // Swap方法交换索引i和j的两个元素    Swap(i, j [int](https://studygolang.com/static/pkgdoc/pkg/builtin.htm#int))}一个满足sort.Interface接口的（集合）类型可以被本包的函数进行排序。方法要求集合中的元素可以被整数索引