Re: Registry warning?

[David Engster <deng@randomsample.de>]

Ted Zlatanov writes:
> On Wed, 28 Sep 2011 09:29:33 +0200 David Engster <deng@randomsample.de> wrote: 
>
> DE> Ted Zlatanov writes:
>>> On Sun, 04 Sep 2011 23:01:43 +0200 David Engster <deng@randomsample.de> wrote: 
>>> 
> DE> Dave Goldberg writes:
>>>>> ~/.gnus/registry.eioio seems to be persistent - that is the file
>>>>> doesn't get removed when I exit so I don't understand what might be
>>>>> wrong with it when it wants to reload.
>>> 
> DE> The persistence of the registry depends on (featurep
> DE> 'hashtable-print-readable), which is available on FSF Emacs >=23.2. Gnus
> DE> should probably say something more meaningful on older Emacsen...
>>> 
>>> I thought EIEIO had its own persistence mechanism, not using
>>> `hashtable-print-readable'?  That was one of the reasons I switched to
>>> it, so serialization would Just Work.
>
> DE> No. If you look in your mails somewhere around May, you'll see I wrote
> DE> this to you when discussing ERT tests on Emacs 22. EIEIO cannot
> DE> magically save any LISP structure (what about recursive structures, for
> DE> example?). It uses prin1 and hopes for the best, but you can provide
> DE> your own printer in the ':printer' slot.
>
> Thanks for repeating the information, I either forgot or misunderstood
> it.  So can we provide a custom printer for Emacs 23.1 and older?

Yes, for some definition of "we" (read: not me). ;-)

-David