go - 在动态结构函数 Golang 中修改结构值

Question

我有带setter函数的结构

package main

type Person struct {
   Name string
   Age int
}

func (p *Person) SetName(name string) {
   p.Name = name
}

func SomeMethod(human interface{}){
   // I call the setter function here, but doesn't seems exist
   human.SetName("Johnson")
}

func main(){
   p := Person{Name : "Musk"}
   SomeMethod(&p)
}

报错如下:

human.SetName undefined (type interface {} is interface with no methods)

似乎 func SetName 没有包含在 SomeMethod 中

为什么会这样？任何答案将不胜感激!

Answer 1

使用setName创建接口(interface)并在Person结构上实现它然后调用SomeMethod设置Person的值>

package main

import "fmt"

type Person struct {
   Name string
   Age int
}

type Human interface{
    SetName(name string)
}

func (p *Person) SetName(name string) {
   p.Name = name
}

func SomeMethod(human Human){
   human.SetName("Johnson")
}

func main(){
   p := &Person{Name : "Musk"}
   SomeMethod(p)
   fmt.Println(p)
}

Go playground

要使用 getter 方法为任何通过 Human 接口(interface)传递的结构获取名称，请在 Human 接口(interface)上实现 getter 属性

package main

import (
    "fmt"
    )

type Person struct {
   Name string
   Age int
}

type Person2 struct{
   Name string
   Age int
}

type Human interface{
    getName() string
}

func (p *Person2) getName() string{
   return p.Name
}

func (p *Person) getName() string{
   return p.Name
}

func SomeMethod(human Human){
   fmt.Println(human.getName())
}

func main(){
   p := &Person{Name : "Musk"}
   SomeMethod(p)
   p2 := &Person2{Name: "Joe"}
   SomeMethod(p2)
}

Go playground