链接函数如何作为goroutines执行？

Question

Given this playground:

package main

import "fmt"

func main() {
    go oneFunc().anotherFunc()
}

func oneFunc() something {
    fmt.Println("oneFunc")
    return something{}
}

type something struct{}

func (s something) anotherFunc() {
    fmt.Println("anotherFunc")
}

Why is the output:

oneFunc

and "anotherFunc" is never printed?

Answer 1

anotherFunc doesn't execute until oneFunc returns a value. Because of this, the program exits before anotherFunc is able to run. You need to wait for anotherFunc to run before main exits.

You can do this via Go channels. For Example:

http://play.golang.org/p/dWoLB9afSj

package main

import "fmt"

func main() {
    ch := make(chan int)
    go oneFunc(ch).anotherFunc()
    fmt.Println("Waiting...")
    <-ch
    fmt.Println("Done.")
}

func oneFunc(ch chan int) something {
    fmt.Println("oneFunc")
    return something{ch}
}

type something struct{
    ch chan int
}

func (s something) anotherFunc() {
    fmt.Println("anotherFunc")
    s.ch <- 1
}