Understanding Go nil interface

nil-interface.go

package main

import (
	"fmt"
)

type T struct {
}

func main() {
	var v *T           // v is a nil pointer
	var v2 interface{} // v2 is a nil interface (holds nothing)
	v2 = v             // v2 is a non-nil interface holding a nil pointer (v)

	fmt.Printf("v is a nil pointer: %v\n", v == nil)
	fmt.Printf("v2 is a nil interface: %v\n", v2 == nil)
	fmt.Printf("v2 is a interface holding a nil pointer: %v\n", v2 == (*T)(nil))
}