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Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!cme!libes
From: libes@cme.nist.gov (Don Libes)
Newsgroups: comp.ai,comp.lang.c++,comp.lang.c
Subject: Re: Lisp Eval in C or C++
Message-ID: <1327@muffin.cme.nist.gov>
Date: 9 Apr 91 06:32:50 GMT
References: <1991Apr4.182329.5513@searchtech.com>
Followup-To: comp.ai
Organization: National Institute of Standards and Technology
Lines: 16

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.

We've used Tcl in a number of projects as a quick way of getting
dynamic expression evaluation in C programs.

It's public-domain, portable to SV and BSD, well-documented, and easy
to use and extend.  In only 45k, it doesn't do everything (scoping and
data structures are fairly unsophisticated) but since I began using
it, I've dramatically cut down on my yacc/lex usage.

Don Libes          libes@cme.nist.gov      ...!uunet!cme-durer!libes