Go嵌入类型及内部提升样例

package main

import (
	"fmt"
)


type notifier interface {
	notify()
}

type user struct {
	name  string
	email string
}

func (u *user) notify() {
	fmt.Printf("Sending user email to %s<%s>\n",
		u.name,
		u.email)
}

type admin struct {
	user
	level string
}

func (a *admin) notify() {
	fmt.Printf("Sending admin email to %s<%s>\n",
		a.name,
		a.email)
}


//main is the entry of the program
func main() {
	ad := admin {
		user:  user {
			name: "john smith",
			email: "john@yahoo.com",
		},
		level: "super",
	}
	
	sendNotification(&ad)
	ad.user.notify()
	ad.notify()
	
}

func sendNotification(n notifier) {
	n.notify()
}