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Re: Metaobject Protocol in MACL 2.0
- To: Josh Lubell <lubell@cs.UMD.EDU>
- Subject: Re: Metaobject Protocol in MACL 2.0
- From: firstname.lastname@example.org.COM
- Date: Thu, 6 Sep 1990 08:21:41 PDT
- Cc: email@example.com.COM, CommonLoops.PARC@Xerox.com
- In-reply-to: "Your message of Thu, 06 Sep 90 10:27:31 -0400. <9009061427.AA06873@soleil.cs.UMD.EDU>"
To: firstname.lastname@example.org, CommonLoops.email@example.com
Subject: Metaobject Protocol in MACL 2.0
Date: Thu, 06 Sep 90 10:27:31 -0400
From: Josh Lubell <lubell@cs.UMD.EDU>
Will the CLOS that's supposed to be in MACL 2.0 include any of the
Metaobject Protocol (MOP) functionality? While I applaud Apple for
including CLOS in the new release and for changing Object Lisp objects
in its implementation to CLOS objects, Apple should realize that a
CLOS implementation without MOP functionality has limited utility.
Since the MOP has not yet been finalized, I would be satisfied if
Apple would support a subset of the MOP and document the functions
used in their implementation that support additional MOP
functionality. That way, I will be able to locally implement the MOP
to support my applications..
I am currently using MACL 1.3.2 with Portable Commonloops (PCL), and I
am making extensive use of the MOP. If MACL 2.0 were to include a
fast CLOS with an adequate subset of the MOP included, then my code
would compile and run significantly faster. However, without
adequate MOP functionality, I would be forced to continue using PCL.
Are there other MACL users who would like to see the MOP as part of
the next release. If so, then let's make sure Apple knows we're out
In the interest of releasing MACL 2.0 in a timely manner, it will
conform to the specifications in CLtL, Second Edition: no MOP. We
hope to provide at least a subset of the MOP in a future release.
Exactly what this subset is will depend a lot on what the Lisp
community decides about the definition of the MOP.
Said a little less formally: I wanna write a MOP, but I ain't yet had
Those who need PCL's MOP can continue to use PCL in MACL 2.0.