With the latest from svn, I'm seeing the following weird behavior.
(def r (ref :old))
(let [old-value @r]
(try
(dosync (ref-set r :new))
(finally
(dosync (ref-set r old-value))
)))
(println "@r is" @r)
This prints "@r is nil" whereas I'd expect it to print "@r is :old".
But the following prints "@r is :old" as expected:
(def r (ref :old))
(let [old-value @r]
(try
(dosync (ref-set r :new))
(finally
old-value ; This line is the only difference
(dosync (ref-set r old-value))
)))
(println "@r is" @r)
The only difference is the do-nothing expression old-value that
immediately follows the finally. Am I missing something or is this a
bug?
I realize this is a very weird thing to be doing. In the real world
you'd want to have one (dosync ...) block, but this is for a macro for
unit tests where I want to be able to restore the proper value of a
ref after a test has had a chance to mess it up.
Thanks.
-hume.
--
http://elhumidor.blogspot.com/
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