func Pipe(p Producer, c Consumer) error { // TODO buf := make([]any, 0, MaxItems) cookies := make([]int, 0) flush := func() error { if len(buf) == 0 { return nil } if err := c.Process(buf); err != nil { return err } for _, cookie := range cookies { if err := p.Commit(cookie); err != nil { return err } } buf = buf[:0] cookies = cookies[:0] return nil } for { items, cookie, err := p.Next() if err != nil { flush() return err }