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;; Copyright (c) Stephen C. Gilardi. All rights reserved. The use and
;; distribution terms for this software are covered by the Eclipse Public
;; License 1.0 (http://opensource.org/licenses/eclipse-1.0.php) which can
;; be found in the file epl-v10.html at the root of this distribution. By
;; using this software in any fashion, you are agreeing to be bound by the
;; terms of this license. You must not remove this notice, or any other,
;; from this software.
;;
;; clojure.contrib.condition.example.clj
;;
;; scgilardi (gmail)
;; Created 09 June 2009
(ns clojure.contrib.condition.example
(:use clojure.contrib.condition))
(defn func [x y]
(if (neg? x)
(raise :source ::Args :arg 'x :value x :message "shouldn't be negative")
(+ x y)))
(defn main
[]
;; simple handler
(handler-case :source
(println (func 3 4))
(println (func -5 10))
(handle ::Args
(printf "Bad argument: %s\n" *condition*)))
;; demonstrate nested handlers
(handler-case :source
(handler-case :source
(println (func 8 2))
(println (func -6 17))
;; no handler for ::Args
(handle ::nested
(printf "I'm nested: %s\n" *condition*)))
(println (func 3 4))
(println (func -5 10))
(handle ::Args
(printf "Bad argument: %s\n" *condition*))))
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