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0 pointsbjourne4y ago0 comments

How many Lisp implementations follow the HyperSpec? I'm no Lisp expert but from what I've seen the object system can vary quite a bit depending on the exact implementation.

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jackdaniel4y ago· 1 in thread

Since we talk about CLOS (and HyperSpec, which is based on the last draft before the standard), I assume that we talk about Common Lisp. All conforming Common Lisp implementations have CLOS. To name a few which are used:

free: ABCL, CLISP, CCL, CMUCL, ECL, SBCL; commercial: AllegroCL, LispWorks. There are more.

I've made a diagram a few years back that shows the family with ancestors and sub-branches including these that are not complaint: https://ecl.common-lisp.dev/static/quarterly/img/vol4/all-hi...

Common Lisp strength is its standard; many programs developed on one implementation will work on another one. And standard includes CLOS.

As far as I know, scheme had a bit of problems with that the standard was too small, and there were numerous implementations of the same functionality that were different; the issue with fragmentation was also problematic in pre-common lisp times - that was one of reasons why there was a grant to create the standard - to unify numerous implementations.

lispm4y ago

There are also derived versions of CLOS in other languages. Examples: Languages like Dylan and Scheme extensions (see http://community.schemewiki.org/?CLOS ).

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