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Re: I like to use method combination
- To: Jim Salem <Salem@Think.COM>
- Subject: Re: I like to use method combination
- From: firstname.lastname@example.org
- Date: Wed, 19 Oct 88 09:42:06 -0400
- Cc: common-loops@Think.COM
- In-reply-to: Your message of Tue, 18 Oct 88 20:19:00 -0400. <19881019001939.2.SALEM@POLYCARP.THINK.COM>
- Redistributed: CommonLoops.pa
Date: Tue, 18 Oct 88 20:19 EDT
From: Jim Salem <Salem@think.com>
Subject: I like to use method combination
PCL doesn't currently support CLOS's method combination. However, I'd
like to use another method combination type besides the standard one.
- Will PCL support method combination anytime soon ? When ?
Well, this is something planned, but we seem to be concentrating on
- Has anyone tried to implement this in PCL already ?
Yes, we have one which we are trying to make available. We expected
PCL to have this so we didn't push it too hard. But, everything seems
to take longer than we expect....
Since those are probably both NO, I'm willing to dive in and try to
implement it but I'd like a little info/help.
My strategy is to add a method-combination slot to the
standard-generic-function class (in defs.lisp) and then modify the
appropriate function(s) in combin.lisp to generate the appropriate code.
Yes, our approach was to just use a slot that wasn't currently use.
A cursory reading of combin.lisp suggests the only function I need modify
is COMPUTE-EFFECTIVE-METHOD-BODY. Is this reasonable ? What is likely to
lose ? [Of course if this wins, there will be free code for all. :-)]
Yes, basically, but you must also provide defgeneric and the method
combination defining macros.