From: Stefan Monnier <monnier@iro.umontreal.ca>
To: help-gnu-emacs@gnu.org
Subject: Re: Catching no generic method in EIEIO
Date: Sat, 28 May 2016 14:29:26 -0400 [thread overview]
Message-ID: <jwvinxyniw8.fsf-monnier+gmane.emacs.help@gnu.org> (raw)
In-Reply-To: 87mvncg8nd.fsf@russet.org.uk
>>> The last form crashes -- I could, of course, implement this using
>>> defmethod on Two, but I want to this for any method.
>> (defmethod ((o t))
>> ...)
>> should do the trick.
> Didn't know you could do that, but it's not what I wanted. It implements
> the method for all objects. Where was what I wanted was to implement all
> methods on one object (or class).
FWIW, I think you can might be able to do that (at least for those
methods which don't have a default case like the one I provided above)
with something like
(cl-defmethod cl-no-applicable-method (generic (x <myclass>) &rest args)
aka
(defmethod no-applicable-method ((x <myclass>) generic &rest args)
but this will only catch those methods where the dispatch on <myclass>
was done on the first argument.
>> PS: Of course, I also recommend you switch to cl-generic
>> (i.e. use (cl-defmethod ...)). It's more featureful and much faster.
> I'm going to fix all that when I port everything to emacs-25. I'm just
> waiting till that hits the shelf.
There's a forward compatibility cl-generic package in GNU ELPA, so you
should be able to start using it without dropping
backward compatibility.
Stefan
prev parent reply other threads:[~2016-05-28 18:29 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-25 16:03 Catching no generic method in EIEIO Phillip Lord
2016-05-25 16:06 ` Dmitry Gutov
2016-05-25 18:19 ` Stefan Monnier
2016-05-26 15:07 ` Phillip Lord
2016-05-28 18:29 ` Stefan Monnier [this message]
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