为结构使用匿名方法

Question

Does Go support anonymous methods for structures and if they do how do you create and call them?

This is the code I've been trying to get work but I'm unsure if Go(go version go1.1.2 linux/amd64) supports anonymous methods to structures.

package main

import (
  "fmt"
)

type Person struct{
  name string
  age int
}

func (p Person) get_details() string {
  return fmt.Sprintf("Name->%s, Age->%d", p.name, p.age)
}

func main() {
  p := Person{name:"G4143", age:5}

  //simple anonymous function which works
  fmt.Println(func(i int)int{return i * i}(34))

  str := p.get_details()

  fmt.Println(str)

  //anonymous method which won't compile
  str = p.func(p Person)()string{return fmt.Sprintf("Name->%s, Age->%d", p.name, p.age) }()

  fmt.Println(str)
}

I thank-you for any guidance..

Answer 1

You can't do that, however you have 3 options :

Private method :

type Person struct{
    name string
    age int
}

func (p Person) Details() string { // public
    return fmt.Sprintf("Name->%s, Age->%d", p.name, p.age)
}

func (p Person) details() string { // private, notice the lowercase D
    return fmt.Sprintf("Name->%s, Age->%d", p.name, p.age)
}

Use the inline function just like this :

str = func()string{return fmt.Sprintf("Name->%s, Age->%d", p.name, p.age) }()

Pass the variable to the inline function :

str = func(p Person) string { return fmt.Sprintf("Name->%s, Age->%d", p.name, p.age) }(p)