FYI... another TurboGears developer speaks up re: their generic function use.
>Date: Thu, 19 Jul 2007 20:17:23 -0400 >From: "Mark Ramm" >To: "Phillip J. Eby" >Subject: Re: [Python-3000] pep 3124 plans > >>FYI, Jonathan, the version of PEAK-Rules that's in SVN implements >>everything that's currently in PEP 3124 except the Interface bits. >> >>It does not, however, implement RuleDispatch-style predicate >>expressions, just argument-isinstance tests. I'd hoped to have >>predicates done this month, but it's running a couple weeks >>behind. After it's done, I plan to throw together a >>RuleDispatch-style API over it, to make porting/testing easier, using >>something like "from peak.rules import dispatch" to get a module that >>fakes the RuleDispatch API (e.g. somefunc.when() instead of when(somefunc)). > >This is good news indeed. TurboGears 2 is looking for rule based >dispatch, and I'm very interested in PEAK Rules as an alternative to >RD since you've pretty much deprecated RD. But an RD like interface >on PEAK-Rules will make TG2 more API compatible, and opens up the >possibility of moving over in the tg 1.x line. > >Predicate dispatch isn't really needed for some of the things in >TurboGears, and there are a couple of places where we went overboard >with generic functions everywhere. But, at the same time there are >other places where generic functions and predicate dispatch really >make things a lot easier to understand, and it would hurt quite a bit >to have to to give it up. > >As the maintainer of tg2, my main interest is to have a viable, >reasonably well supported, generic function implementation that we can >use and rely on. > >I don't so much care that it's baked into the core language, or >included in the standard library -- though I think those would be >great things. Generic functions helped me to think about problems in >a new way, and have been a remarkably useful tool to have in my >toolbox. > >--Mark Ramm _______________________________________________ Python-3000 mailing list Python-3000@python.org http://mail.python.org/mailman/listinfo/python-3000 Unsubscribe: http://mail.python.org/mailman/options/python-3000/archive%40mail-archive.com
