Bug #102630 for Moose: anonymous class instances contain a reference to its meta

Sat Mar 07 18:35:17 2015 ether [...] cpan.org - Ticket created

Subject:

anonymous class instances contain a reference to its meta

An instance of a class created with Moose::Meta::Class->create_anon_class contains the metaclass in the '<<MOP>>' key -- is this really necessary? We stopped doing this for regular classes a while back (partially because of the huge spam created when data-dumping the object). $class->meta should be perfectly capable of finding the metaclass without us having to store a reference to it in the object instance itself.

Sat Mar 07 19:02:18 2015 doy [...] tozt.net - Correspondence added

CC:	;
Subject:	Re: [rt.cpan.org #102630] anonymous class instances contain a reference to its meta
Date:	Sat, 7 Mar 2015 19:02:05 -0500
To:	Karen Etheridge via RT <bug-Moose [...] rt.cpan.org>
From:	Jesse Luehrs <doy [...] tozt.net>

Yes, it is - anon classes are weak refs by default, so they need a way to not be deleted while instances still exist, or else things break. There are tests for this. As far as I know, we've never done this for regular classes - the only reason for this key existing is to manage weak metaclasses. It's possible you could get the same effect with some weird inside-out fieldhash trickery, but it would probably be complicated and hard to get entirely correct. -doy

Sat Mar 07 19:02:19 2015 The RT System itself - Status changed from 'new' to 'open'

Sat Mar 07 19:42:20 2015 ether [...] cpan.org - Correspondence added

RT-Send-CC:

doy [...] tozt.net

Ok, fair! I'll leave this open as a wishlist item in case anyone has any clever (but not too clever) ideas.

Sat Mar 07 19:42:32 2015 ether [...] cpan.org - Severity Wishlist added