I found that Rich wrote a simple tracing facility:
http://groups.google.com/group/clojure/browse_frm/thread/fd315d9dfdb8c32c/7479682cdf3a1b97
What I had in mind is to literally turn on and off parts of code. This way
I can play with design by contract:
(def *section-tags* {:require true})
(defmacro section [tag & body]
(if (*section-tags* tag)
`(do [EMAIL PROTECTED])))
(defn mysqrt [x]
(section :require
(if (< x 0)
(throw (new Exception "mysqrt: x >= 0"))))
(Math/sqrt x))
----
user=> (mysqrt 2)
1.4142135623730951
user=> (mysqrt -1)
java.lang.Exception: mysqrt: x >= 0
Frantisek
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