Hi, On Aug 5, 2:14 pm, Laurent PETIT <laurent.pe...@gmail.com> wrote:
> (ns delay.util) > > (defprotocol Cancellable (isCancelled [this]) (cancel [this])) > > (defn timed-delay [pause fun] > (let [d (delay (fun)) > f (future (Thread/sleep pause) @d)] > (reify > clojure.lang.IDeref > (deref [_] @d) > delay.util.Cancellable > (isCancelled [_] (future-cancelled? f)) > (cancel [_] (future-cancel f))))) > > What about this ? This looks ok, I think. At least better than "hijacking" the future. However, I'm still the opinion, that you mix up concerns here. "Cancellable" somehow implies that it stops whatever the thing is doing. But it has no influence on the deref. To me this would be surprising. For me the whole future thing is a side-effect which is not relevant to the consumer of the parsed code. It is a convenience which can be tracked separately from the actual delay. Sincerely Meikel -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
