kriegs@Whitney (David Kriegman) (07/23/87)
I was wondering if there are any object oriented programming systems available for Common LISP. We're using Symbolics machines right now and have been using flavors but we'd like our code to be portable to other common lisp systems (e.g. LUCID and KCL). I've heard of something called CLOS but I don't know anything about it. Is CLOS similar to flavors? What else is out there? Thanks in advance...
barmar@think.COM (Barry Margolin) (07/24/87)
In article <8232@labrea.STANFORD.EDU> kriegs@Whitney.UUCP (David Kriegman) writes: >I was wondering if there are any object oriented programming systems >available for Common LISP. We're using Symbolics machines right now >and have been using flavors but we'd like our code to be portable to >other common lisp systems (e.g. LUCID and KCL). I've heard of something >called CLOS but I don't know anything about it. Is CLOS similar to >flavors? What else is out there? > >Thanks in advance... CLOS is Common Lisp Object System, and it is an object-oriented extension to Common Lisp that is being designed and developed by several members of the ANSI Common Lisp committee (much of the work seems to have been done by Symbolics and Xerox). It takes most of its ideas from Symbolics's New Flavors and Xerox's Common Loops. It is a functional superset of Flavors, but doesn't use Flavors syntax. One of the chief additions is "multimethods", i.e. the ability to choose a method based on the types of more than one argument to a generic function. It also is integrated with the regular Common Lisp type system, allowing methods to be defined for predefined types; for example, you can do somthing like: (defmethod foo ((arg1 integer) (arg2 integer)) ...) (defmethod foo ((arg1 integer) (arg2 float)) ...) (defmethod foo ((arg1 float) (arg2 integer)) ...) ... You can probably get the current draft documentation on this from Gregor Kiczales or Danny Bobrow at Xerox. Sorry, I don't know their network addresses, but my guess is Bobrow@XEROX.COM would get to him. Barry Margolin Thinking Machines Corp. barmar@think.com seismo!think!barmar
preston@felix.UUCP (Preston Bannister) (07/27/87)
In article <6826@think.UUCP> barmar@godot.think.com.UUCP (Barry Margolin) writes: >CLOS is Common Lisp Object System, and it is an object-oriented >extension to Common Lisp that is being designed and developed by >several members of the ANSI Common Lisp committee (much of the work >seems to have been done by Symbolics and Xerox). ..... >You can probably get the current draft documentation on this from >Gregor Kiczales or Danny Bobrow at Xerox. Sorry, I don't know their >network addresses, but my guess is Bobrow@XEROX.COM would get to him. All right, does anyone out there know more about CLOS? I read the Common Loops paper in the last OOPS proceedings and was quite interested. I'd like to hear more... ======================================== Preston L. Bannister USENET : ucbvax!trwrb!felix!preston BIX : plb CompuServe : 71350,3505 GEnie : p.bannister -- ======================================== Preston L. Bannister USENET : ucbvax!trwrb!felix!preston BIX : plb CompuServe : 71350,3505 GEnie : p.bannister
roberts@cognos.uucp (Robert Stanley) (07/31/87)
In article <8232@labrea.STANFORD.EDU> kriegs@Whitney.UUCP (David Kriegman) writes: >I've heard of something called CLOS but I don't know anything about it. >Is CLOS similar to flavors? What else is out there? CLOS is the Common Lisp Object System being developed by the AI group at Xerox PARC, sitting on the Lyric release of Interlisp, the Common Lisp version. As of the last users' group meeting (at AAAI in Seattle), the Lyric release was due early August. CLOS itself, while being demonstrated at AAAI, was not a released product. It is written in Common Lisp, and the Lyric release appears to be a fine implementation, but I haven't done more than play briefly under supervision, and watch a demo. Certainly worth looking at, but you'll have to deal with Xerox directly to find out the availability on 'foreign' common lisp systems. E-mail me if you want contacts into Xerox. -- Robert Stanley Compuserve: 76174,3024 Cognos Incorporated uucp: decvax!utzoo!dciem!nrcaer!cognos!roberts 3755 Riverside Drive or ...nrcaer!uottawa!robs Ottawa, Ontario Voice: (613) 738-1440 - Tuesdays only (don't ask) CANADA K1G 3N3