No, because that global mutable variable would need to be specifiable by
Specter on usage of the library. For example, if you wrote:
(defn foo []
(select [:a :b] {:a {:b 1}}))
`select` has no ability to control anything outside the context of its
form. It certainly can't wrap `foo` to put a volatile field in its closure.
So for the static-field idea, it would expand to something like:
(defn foo []
(static-field [pathcache]
(if-not pathcache (set! pathcache ...))
...
))
On Tuesday, May 31, 2016 at 3:15:26 PM UTC-4, puzzler wrote:
>
> In your writeup, you say that there would be further speed benefits if you
> could have a global mutable variable within the context of a function (like
> a static field).
>
> Can't you effectively accomplish that already in Clojure like this?:
>
> (let [mycache (volatile! nil)]
> (defn foo []
> ...)))
>
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