goroutine with bound or whatever

go.go

type Futureproof func (chan error) 


func DoSomethingSlow(ctx context.Contex, f Futureproof) errch chan error {
	fErr := make(chan error)
	go func() {
		select {
		case <-ctx.Done():
			errch <- ctx.Err()
		case err := <-fErr:
			errch <- err
		}
	}()
	go f(fErr)
	return errch
}


func main {
	f := func(errch chan error) {
		err := makeSomeRequest()
		errch <- err
	}
	
	ctx := context.WithTimeout(context.Background(), 1*time.Second)
	ch := DoSomethingSlow(ctx, f)


	// do some other stuff

	err <- ch
	if err != nil {
		log.Panicln("oh noes", err)
	}
}

probably needs to close some channels somewhere