在Go中使用匿名字段传递结构

Question

Go newbie here. I have two structs, Parent and Child. Child contains Parent as an anonymous field. I want to know how I can pass that struct to a function which is expecting a Parent (and knows nothing about Child). Here's code illustrating what I want to do:

package main

import "fmt"

type Parent struct {
    Dad string
}

type Child struct {
    Parent
    Son string
}

func myfunc(data Parent) {
    fmt.Printf("Dad is %s
", data.Dad)
}

func main() {
    var data Child
    data.Dad = "pappy"
    data.Son = "sonny"
    myfunc(data)
}

What's the magic declaration of myfunc() to get this to work?

Answer 1

Your code works on the Go playground if you just change the second-to-last line to:

myfunc(data.Parent)

You shouldn't expect to be able to make it work just be changing myfunc since you said that myfunc cannot know anything about the Child class.