Hi,
Am Mittwoch, 19. Juni 2013 17:00:17 UTC+2 schrieb Max Gonzih:
>
> Hi, I implemented small macro to catch multiple exception classes with one
> body.
>
> https://gist.github.com/Gonzih/5814945
>
> What do you think? Are there better ways to achieve similar results?
>
>
I would just extend try a simply as possible: simply add the catch-all, but
keep catch and finally as is. Here my try:
(defmacro try*
[& body]
(let [catch-all? #(and (seq? %) (= (first %) 'catch-all))
expand-catch (fn [[_catch-all exceptions & catch-tail]]
(map #(list* 'catch % catch-tail) exceptions))
transform (fn [form]
(if (catch-all? form)
(expand-catch form)
[form]))]
(cons `try (mapcat transform body))))
(try*
(println :a)
(println :b)
(catch-all [A B C] e (println (type e)))
(catch D _ (println "Got D!"))
(finally (println "Finally!")))
expands to
(try
(println :a)
(println :b)
(catch A e (println (type e)))
(catch B e (println (type e)))
(catch C e (println (type e)))
(catch D _ (println "Got D!"))
(finally (println "Finally!")))
Kind regards
Meikel
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