反射结构的类型错误

Question

I have 2 different packages(pkg1, pkg2), in first i have code that calls function from another package

file#1

package pkg1
import "pkg2"
import "reflect"

type User struct {
  name string
  ...
}

func main() {
  fmt.Println(reflect.TypeOf((*User)(nil)) //=> *User
  pkg2.RegisterStruct(reflect.TypeOf((*User)(nil))
  //pkg2.RegisterStruct(reflect.TypeOf(&User{}) // also tried this way
}

file#2

package pkg2

import "reflect"

func RegisterStruct(u interface{}) { // also tried to have argument type as reflect.Type
 fmt.Println(u) //=> *reflect.rtype
}

Why type was reflect.rtype instead of *User ? And how do i correctly pass type to another pkg?

Answer 1

The reflect.TypeOf() returns a reflect.Type now you are doing two completely different things with: In the first call to Println (the "correct" one) this reflect.Type is wrapped inside an interface{} (during the call to Println) while in the second (the "wrong" one) you wrap the reflect.Type inside an interface{} while calling RegisterSturct and you then rewrap it once more inside an additional interface{} while calling Println. Println just removes one layer of interface{}-wrapping.

Sorry, this is nonsense. I'll have to think a bit more. Would delete if possible.