[PEAK] Issues with peak.rules predicates

[Phillip J. Eby]

At 10:57 PM 2/9/2008 -0500, rdmurray at bitdance.com wrote:
>On Sat, 9 Feb 2008 at 18:22, Phillip J. Eby wrote:
>>No.  It's probably a bug of some sort.  If you can reduce the 
>>problem to a short example, I should be able to fix it pretty easily.
>
>I think this should be short enough :)
>
>Given:
>
>     >>> from peak.rules import when
>     >>> def foo(Y):
>     ...     print "default"
>     >>> @when(foo, "not Y")
>     ... def footest(Y):
>     ...     print "footest"
>
>This fails:
>
>     >>> foo(False)
>     footest

Excellent catch.  The problem was that rules of the form 'not X' were 
being treated as having no disjuncts.  Tests added and bug fixed in SVN.