[closer-devel] Define-Layered-Function Error in Sbcl 1.0.29

[Pascal Costanza]

This should work correctly, and some superficial tries at doing this  
myself in SBCL 1.0.30 with the current versions of ContextL and Closer  
to MOP as they are found in the source repositories, everything seems  
to be fine.

Can you give me more information about your setup? What version of  
SBCL do you use, what versions of ContextL and Closer to MOP (can be  
found in the ASDF files)?

What did you do before you tried this? Did you run some of the test  
programs provided with ContextL? Does the error occur also when you do  
this in a freshly started SBCL with ContextL just loaded?


Best,
Pascal

On 23 Aug 2009, at 16:48, Seth Burleigh wrote:

> When calling (define-layered-function display-object (object)) with  
> the latest version of context and closer-mop
> I get
>
> STYLE-WARNING:
>    redefining =LAYERED-FUNCTION-DEFINER-FOR-DISPLAY-OBJECT= in  
> DEFGENERIC
> Cannot CHANGE-CLASS objects into GENERIC-FUNCTION metaobjects.
>    [Condition of type SB-PCL::METAOBJECT-INITIALIZATION-VIOLATION]
>        0: [RETRY] Retry SLIME REPL evaluation request.
>        1: [ABORT] Return to SLIME's top level.
>        2: [ABORT] Abort
>        3: [CLOSE-CONNECTION] Close SLIME connection
>        4: [ABORT] Exit debugger, returning to top level.
>
> Expanding, the problem is in this form
>
> (DEFGENERIC =LAYERED-FUNCTION-DEFINER-FOR-DISPLAY-OBJECT=
>              (layer-arg OBJECT)
>              (:GENERIC-FUNCTION-CLASS LAYERED-FUNCTION)
>              (:ARGUMENT-PRECEDENCE-ORDER OBJECT layer-arg))
>  (DECLAIM (INLINE DISPLAY-OBJECT))
>
> Apparently, it doesn’t like the layered-function argument. Any ideas  
> how to fix this? I have absolutely no experience
> in making new CLOS protocols.
> Thx!
>
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> closer-devel at common-lisp.net
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-- 
Pascal Costanza, mailto:pc at p-cos.net, http://p-cos.net
Vrije Universiteit Brussel
Software Languages Lab
Pleinlaan 2, B-1050 Brussel, Belgium






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