Much clearer now :) Never heard of that *compile-files* var. Having to
resort to it looks pretty nasty anyway - I'd rather refactor my code
instead.
Thanks for the answer Luc!
On Thu, Feb 28, 2013 at 2:44 AM, Softaddicts <lprefonta...@softaddicts.ca>wrote:
> Of course, the expression needs to be evaluated at runtime only :)
> Presently, your jetty server gets started just after the expression is
> compiled.
>
> When you want to defer evaluation at runtime when generating compiled code
> ahead of time, you need to wrap expressions like these with this:
>
> (def server (when-not *compile-files* (jetty/...
>
> This will defer evaluation of the expression when the code actually runs,
> not after it got compiled.
>
> Remember, expressions are compiled then evaluated immediately.
> Be cautious, you can get stuff started this way while building your
> targets.
>
> It's unlikely that you want this to happen...
>
> Luc P.
>
> > So I was playing with AOT for the first time. My main reason to use it is
> > so the consumer Java code doesn't look so alien / run-timey.
> >
> > The thing is, I encountered that the following line causes `lein compile`
> > to hang:
> >
> > (def server (jetty/run-jetty #'app {:port 8000 :join? false}))
> >
> > (for those not familiar with Jetty, the expression causes a web server to
> > launch.)
> >
> > I can sort of see why this code represents a fault, from a compiler's
> point
> > of view. But OTOH, in e.g. Java it's not that much of a rare practice to
> > bind a the result of a side-effectful op to a variable definition, right?
> >
> > My question is quite simply, why can't the given code compile? It is not
> > entirely clear to me, as I don't thoroughly understand how Clojure's
> > compiler works (or any compiler at all, for that matter).
> >
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> Softaddicts<lprefonta...@softaddicts.ca> sent by ibisMail from my ipad!
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