Go 匿名字段与实现重写方法

如何为匿名字段？比如一个结构体中包含另外一个结构体作为属性，例子：

type User struct {
    id   int
    name string
}

type Manager struct {
    User
}


User即为匿名字段

package main

import "fmt"

type User struct {
    id   int
    name string
}

type Manager struct {
    User
}

func (self *User) ToString() string { // receiver = &(Manager.User)
    return fmt.Sprintf("User: %p, %v", self, self)
}

func main() {
    m := Manager{User{1, "Tom"}}
    fmt.Printf("Manager: %p\n", &m)
    fmt.Println(m.ToString())
}

    //结果
    Manager: 0xc42000a060
    User: 0xc42000a060, &{1 Tom}

方法重新：如重新User的方法

package main

import "fmt"

type User struct {
    id   int
    name string
}

type Manager struct {
    User
    title string
}

func (self *User) ToString() string {
    return fmt.Sprintf("User: %p, %v", self, self)
}

func (self *Manager) ToString() string {
    return fmt.Sprintf("Manager: %p, %v", self, self)
}

func main() {
    m := Manager{User{1, "Tom"}, "Administrator"}

    fmt.Println(m.ToString())

    fmt.Println(m.User.ToString())
}

结果：

 Manager: 0xc420074180, &{
   {1 Tom} Administrator}
    User: 0xc420074180, &{1 Tom}