CommonLoops: Merging Lisp and Object-Oriented Programming (1988) [pdf]

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18 pointst1m2 comments

This is one of the ancestors of CLOS. Some CLOS implemenations are descendants of PCL ("Portable CommonLoops") source code.

E.g. see the 1980's Xerox copyright notices in this SBCL source file:

https://github.com/sbcl/sbcl/blob/master/src/pcl/wrapper.lis...

One of the decedents was Xerox LOOPS, which was an Interlisp OO extension and ran on their Alto and Star systems (IIRC). I had the opportunity to play around on one of these and hacked some LOOPS code back in the day. LOOPS itself had a very interesting mix of OO and 'data' oriented programming. It introduced the idea of 'composite' objects - a language formalism that allowed for the instantiation of groups of objects based on a template, among other novel language features.

http://www.markstefik.com/wp-content/uploads/2011/04/1982-Bo...

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