Hi,
Am 21.02.2012 um 22:56 schrieb Aaron Cohen:
> One complication I'm not sure about is nested fns.
>
> I'm typing the following in my email client, so forgive any typos...
>
> For instance: {:op :fn, :children [{:op fn, :children [{:op :constant,
> :form 1}]}, {:op :constant, :form 2}]}
>
> Does your solution result in the top level getting both constants?
> Unfortunately, my specification didn't mention that, but each fn acts
> as a level of scope for the constants, they shouldn't dribble out to
> the top.
At the moment they do. But it's easy to filter out ::fn's.
(defmethod collect-constants ::recursive
[{:as form :keys [children]}]
(->> children
(filter #(-> % :op (= ::fn)))
(map :constants)
(reduce into #{})
(assoc form :constants)))
This breaks the chain of constant propagation at nested ::fn forms.
Meikel
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