我如何知道具有类型接口的参数是否实际上是结构？

Question

I have this function that accepts an interface{}

func MyFunk(itf interface{}) {
}

And I would like to know if the itf passed is a struct, is that possible? I've tried several combinations of reflect, and the closes that I could get was ptr (pointer).

Answer 1

Use the following to detect if the argument is a struct:

func MyFunk(itf interface{}) {
    v := reflect.ValueOf(itf)
    if v.Kind() == reflect.Struct {
        // it's a struct
    }
}

If you also want to check for pointers to structs, then use this code:

func MyFunk(itf interface{}) {
    v := reflect.Indirect(reflect.ValueOf(itf))
    if v.Kind() == reflect.Struct {
        // it's a struct
    }
}