This is connected with my article: https://dev.to/leolara/closing-a-go-channel-written-by-several-goroutines-52j2
I think there I show it is possible to workaround that limitation using standard Go tools. Of course, the code would be simple with priority select, but also perhaps select would become less efficient. On Wednesday, August 28, 2019 at 6:06:33 PM UTC+2, T L wrote: > > The old thread: > https://groups.google.com/forum/#!topic/golang-nuts/ZrVIhHCrR9o > > Go channels are flexible, but in practice, I often encountered some > situations in which channel are hard to use. > Given an example: > > import "math/rand" > > type Producer struct { > data chan int > closed chan struct{} > } > > func NewProducer() *Producer { > p := &Producer { > data: make(chan int), > closed: make(chan struct{}), > } > > go p.run() > > return p > } > > func (p *Produce) Stream() chan int { > return p.data > } > > func (p *Producer) run() { > for { > // If non-blocking cases are selected by their appearance order, > // then the following slect block is a perfect use. > select { > case(0) <-p.closed: return > case p.data <- rand.Int(): > } > } > } > > func (p *Produce) Clsoe() { > close(p.closed) > close(p.data) > } > > func main() { > p := NewProducer() > for n := p.Stream() { > // use n ... > } > } > > > If the first case in the select block in the above example has a higher > priority than the second one, > then coding will be much happier for the use cases like the above one. > > In short, the above use case requires: > * for receivers, data streaming end is notified by the close of a channel. > * for senders, data will never be sent to closed channel. > > But, as Go 1 doesn't support priority select cases, it is much tedious to > implement the code > satisfying the above listed requirements. The final implementation is > often very ugly and inefficient. > > Does anyone else also experience the pain? > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/b284f880-034a-4721-8686-ef48d3e2c14c%40googlegroups.com.
