On Tue, Mar 10, 2009 at 2:45 PM, Howard Lewis Ship <[email protected]> wrote:
>
> (defmacro example
> [& code]
> `(let [rcode# ~(reverse code)
> fn# (to-fn rcode#)]
> (run-example fn#)))
Thanks for the complete example, it really helps.
Macroexpand might help you see at least one of the problems:
(clojure.core/let [rcode__614__auto__ ((printf "EXAMPLE2\n") (printf
"EXAMPLE1\n"))
fn__615__auto__ (user/to-fn rcode__614__auto__)]
(user/run-example fn__615__auto__))
Since (printf ...) returns nil, it looks like you'll be trying to bind
rcode# to the value of (nil nil), that is 'nil' called with a single
argument of 'nil'. It actually errors out before it gets that far,
but anyway...
Try completing as much of your manipulation as is possible outside the
syntax-quote:
(defmacro example [& code]
(let [rcode (reverse code)]
`(let [func# (to-fn ~rcode)]
(run-example func#))))
Also, try to avoid using builtin names like 'fn' for your own locals.
It only leads to more pain in the long run.
--Chouser
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