Re: Announcing RMCL

On May 27, 2009, at 12:34 PM, peter wrote:

> At 12:02 PM -0700 09/05/27, Ron Garret wrote:
>> [...]
>>
>> Apparently, the applicable method cache is not
>> being reset when an class is redefined.  The bug
>> shows up the other way too:
>>
>> ? (defclass c (a) ())
>> #<STANDARD-CLASS C>
>> ? (m (make-instance 'c))
>> A
>> ? (defclass c () ())
>> #<STANDARD-CLASS C>
>> ? (m (make-instance 'c))
>> A
>> ? (find-method #'m () (list (find-class 'c)))
>>> Error: #<STANDARD-GENERIC-FUNCTION M
>> #x14CFBD6> has no method for NIL
>> (#<STANDARD-CLASS C>)
>>> While executing:
>> #<CCL::STANDARD-KERNEL-METHOD FIND-METHOD
>> (STANDARD-GENERIC-FUNCTION T T)>
>>> Type Command-. to abort.
>> See the RestartsŠ menu item for further choices.
>> 1 >
>>
>>
>> I was about ready to give RMCL a big woo-hoo,
>> but not being able to redefine classes is a
>> show-stopper for me.
>
> Suggest you read the documentation (if you
> haven't) as class redefinition issues are
> mentioned.

They are?  I went through all the release notes, and the only thing I  
could find was this, in release-notes-5.1b2:

Reusing defclass on a class that had :default-initargs before but
doesn't contain a :default-initargs option in the redefinition will not
cause the preexisting :default-initargs to go away. This is in  
accordance
with AMOP. The solution is to include (:default-initargs) in the  
redefinition.

If I missed something, I would be most grateful for additional clues.

rg

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