|Perl: the Markov chain saw|
Overriding bless for inside-out object safetyby xdg (Monsignor)
|on Jan 04, 2006 at 16:33 UTC||Need Help??|
I've been experimenting with some approaches for making inside-out objects a little more user friendly. (c.f. Anti-inside-out-object-ism for some of the common complaints). One of the more obscure issues has to do with thread-safety. I presented an approach for that in Threads and fork and CLONE, oh my!. I'm considering ways of making that more automatic and transparent.
One approach I've considered is a helper module that would override/redefine bless to register objects transparently for use in CLONE (which would also be imported automatically). Usage would be just as with a normal constructor:
Behind the scenes, this bless would do something like this:
$REGISTRY would also be used in CLONE to fix up inside-out objects during thread creation.
I'm a little cautious redefining something as critical as bless so I'd like feedback on this idea. Some specific questions I have include:
Side notes -- the example above is incomplete as inside-out lexical properties also need to be registered somehow for use with CLONE. (I'm working on a good, simple syntax for that.) The InsideOut::Helper name is also just a placeholder as I haven't come up with a name for this module, yet. (That said, what do people think about a new InsideOut top-level name to make a sharper distinction from the more traditional Class? I'm not sure it's needed, but I could see a case for it.)
Also, at least some inside-out generators automatically import a function like id as an alias to refaddr for use like this:
Do people feel this kind of aliasing is helpful or symbol pollution?
Your feedback is greatly appreciated.
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