access value via unsafe

main.go

func main() {
	var i interface{} = 100
	/**
	type eface struct {
		_type *_type
		data unsafe.Pointer
	}
	*/
	n := *(*int)(*(*unsafe.Pointer)(unsafe.Pointer(uintptr(unsafe.Pointer(&i)) + unsafe.Alignof(i))))
	fmt.Println(n)

	type eface struct {
		_type uintptr // placeholder
		data  unsafe.Pointer
	}
	n = *(*int)((*eface)(unsafe.Pointer(&i)).data)
	fmt.Println(n)

	type eface2 struct {
		_type uintptr // placeholder
		data  *int
	}
	n = *((*eface2)(unsafe.Pointer(&i)).data)
	fmt.Println(n)
}