【golang】建立有持续输入的chan

func gentor(done <-chan struct{}) <-chan interface{} {
    genC := make(chan interface{})

    go func() {
        for {
            select {
            case <-done:
                return
            case genC <- rand.Intn(10000):
                time.Sleep(time.Second * 1)

            }
        }
    }()

    return genC
}