https://play.golang.org/p/5KwJQcTsUPg
I fixed it.
The code you have written there has weird non-standard utf-8 code points in
it. It won't make any difference whether you defer the Wait() if no Add is
called the goroutine does not start now.
On Sunday, 5 May 2019 12:27:10 UTC+2, Jan Mercl wrote:
>
> On Sun, May 5, 2019 at 12:06 PM Louki Sumirniy
> <louki.sumi...@gmail.com <javascript:>> wrote:
>
> > Is there ANY other use case for waitgroup other than preventing a
> goroutine leak or ensuring that it empties the channels at the end of
> execution?
>
> I don't think this question is related to the correctness of your
> shorter implementation of WaitGroup. Anyway, what about such code?
>
> var wg sync.WaitGroup
>
> func main() {
> defer wg.Wait()
>
> if someCondition {
> for i := 0; i < 4; i++ {
> wg.Add(1)
> go worker(i)
> }
> }
> ...
> }
>
> func worker(i int) {
> defer wg.Done()
>
> ...
> }
>
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