On Mon, Oct 19, 2009 at 12:39 AM, Gorsal <s...@tewebs.com> wrote:
>
> So now that the future is working, I'm attempting to print from an
> actual java thread. Like this
>
> (defmacro with-thread [nm & body]
> `(let [thread# (Thread. #(fn [] (do ~...@body)))]
> ~@(if nm `((.setName thread# ~nm)))
> (.start thread#)
> thread#))
>
> (with-thread nil (println "HasdfasdfasdfasdfasdfasdfasdfasdfI"))
>
> Except no output! Eeek!!! What am i doing wrong?
Get rid of the extra #:
(defmacro with-thread [nm & body]
`(let [thread# (Thread. (fn [] (do ~...@body)))]
~@(if nm `((.setName thread# ~nm)))
(.start thread#)
thread#))
#(fn [] foo) is equivalent to (fn [] (fn [] foo)), i.e. is a zero-argument
function that returns a zero argument function. So your thread's Runnable
had no side effects and the return value (which, if invoked, WOULD have had
side effects) was discarded and never invoked.
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