Re: defining methods based on built-in ELisp types

On 10/10/2012 07:48 AM, Jesse Alama wrote:
> I recently started to use EIEIO in my ELisp programming.  Coming from
> CLOS, I naturally started to define methods like
>
>    (defmethod foo ((x string) ...))
>
>    (defmethod foo ((x cons)) ...)
>
> But this seems to be unsupported.  It looks like this lack of
> functionality is behind item #2 on the EIEIO wish list ("Method
> dispatch for built-in types").  Has there been any progress on this
> front?

As far as I know, no one has looked into how to make that work.  Most of 
the projects I've worked on have only needed new classes, not extensions 
of built-in types.

I suspect any such feature would need to be done from Emacs core.   I 
suppose it could be faked from the outside, but there would be no useful 
features to inherit from the base type since they have no methods. ;)

Eric


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