On Dec 19, 2:05 pm, Stuart Halloway <stuart.hallo...@gmail.com> wrote:
> According to Paul Graham's On Lisp, macroexpanders should be purely
> functional, and you should not count on how often a macro gets
> expanded. This seems like a reasonable restriction for Clojure too.
> However, Chouser posted an example that shows the expansion of proxy
> does have a side effect [2].
>
> Should macros written by ordinary mortals follow PG's rule?
Yes.
> If not,
> should this be listed as a difference from other Lisps at [3]?
>
No. There's no significant difference between CL and Clojure in this
area.
No one should come to rely on the implementation details of proxy or
gen-class.
Rich
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