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From: bpendlet@bambam.dsd.es.com (Bob Pendleton)
Newsgroups: comp.ai
Subject: Re: Lisp Eval in C or C++
Message-ID: <1991Apr17.172059.19778@dsd.es.com>
Date: 17 Apr 91 17:20:59 GMT
References: <1991Apr4.182329.5513@searchtech.com> <1327@muffin.cme.nist.gov>
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In article <1991Apr4.182329.5513@searchtech.com> belinda@searchtech.com (Belinda Hoshstrasser) writes:
>Basically, what we need is something
>that can evaluate constraints -- something similar to eval in Lisp.  Has 
>anyone out there ever implemented eval in C or C++?  Is there public domain
>code to do this?  If not, we would appreciate any advice or experiences from
>anyone who has had face a similar problem.

I missed the original posting, working takes so much time out of the
day :-) So I'm not sure I'm answering the right question. Yes, I've
written eval in C, and PASCAL, and once even in FORTRAN (shudder). It
is pretty straight forward. Many years ago I was a TA in a class where
we even coached a bunch of undergrads through writing a complete LISP
interpreter.

I'm currently working (slowly, it's a purely home based for fun
project, anybody want to PAY me to do it :-) on a logo interpreter in
c++. Creating trees of objects that evaluate themselves looks pretty
easy, but I haven't finished it yet.

If you have any questions I'd be glad to try to answer them.

-- 
              Bob Pendleton, speaking only for myself.
   bpendlet@dsd.es.com or decwrl!esunix!bpendlet or utah-cs!esunix!bpendlet

                         Tools, not rules.

P.S.

If all else fails try bpendlet@bambam.dsd.es.com, mail is a little
flaky right now.