Hello Clojure users,
This is a dumb question but I'd like to write something equivalent to this
in Clojure:
public String loop_with_exception(int retries)
{
for (int n = retries; n > 0; n--) {
try {
return some_io_operation();
} catch (IOException e) {
continue;
}
}
return null;
}
So I tried writing it like this:
(ns sandbox.core
(:import [java.io.IOException]))
(defn some-io-operation
"Some read I/O operation that could throw an IOException."
[]
(println "WOULD do a read operation"))
(defn loop-with-exception [retries]
(loop [n retries]
(try
(when (pos? n)
(some-io-operation))
(catch IOException e
(recur (dec n))))))
But I get this error:
cd c:/EMACSHOME/CLOJURE-PROJECTS/sandbox/src/sandbox/
1 compiler notes:
Unknown location:
error: java.lang.UnsupportedOperationException: Cannot recur from
catch/finally
core.clj:13:9:
error: java.lang.UnsupportedOperationException: Cannot recur from
catch/finally (core.clj:13)
Compilation failed.
What's the recommended way to handle exceptions and retry inside a
loop/recur?
Thank you.
-Fiel Cab.ral
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