One thing that I always think about but never get around to trying is to run iyacc against the Unicon grammar and have it drive a mockup of the Unicon virtual machine. You would wind up with an "interpreted translated interpreter" (or something like that) which would probably not have stellar performance, but might be decent and general for not-too-complex expressions.
I wonder if anyone has attempted such a feat. On Wed, 30 Aug 2006 07:07:15 -0700, Steve Wampler wrote: > > Lu Song wrote: > > Dear Everyone, > > > > I have a quesiton. > > > > Can Unicon run the Unicon source code reading from input file? > > for example, > > -------------------------------- > > a:=1 > > b:=20*60*60*1000 > > -------------------------------- > > > > I learned that Lisp could do it. > > As Clint reports, there is no full equivalent of Lisp's eval function > (One of the problems is that Unicon has a *much* richer syntax > than Lisp and so an embedded parser isn't as simple to implement. > In this day and age of huge RAM, it would certainly be doable > however.) > > For simple subsets of the language, such as the simple expressions > and assignments in your example, it's really easy to write your > own parser, however. I think there is at least one such solution > in the IPL - you might check there to see if anything suits > your needs. > > I also think I remember code that ran an external Icon > translator on source code strings and then could execute > the result - you might see if that's available in the IPL. > It's an awkward approach in some respects, but nice in > the fact that it doesn't require writing your own parser/ > code generator. > > Hmmm, that might be an interesting project - extending > that solution (of running the Unicon icont externally) so > it could be invoked in a new 'thread' as a translation pipe. > > -Steve > > -- > Steve Wampler -- [EMAIL PROTECTED] > The gods that smiled on your birth are now laughing out loud. ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Unicon-group mailing list Unicon-group@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/unicon-group
