Stefan Petersen wrote: > 2) The aperture macro also contains operations like $4=$1X$5.
My copy of "Gerber Format: Plot Data Format Reference Book" is quite old, (c)1993. But some of the examples use the "$4=" construct to work around the severe restriction on expressions: "Only one operator is allowed between commas.", and "Only one operator is allowed on the right side of the equals sign." If one wants to do anything remotely fancy, one almost has to use this gimmick. I wonder if these restrictions have been eased lately? Even simple left-to-right without operator precedence would be a big step up. I seem to remember running into this problem back with V1.0.2, and thought I might take a whack at fixing it, but I recall gerbv is written mostly in Scheme. To me, it might as well have been written in Boustrophedon. I know that Scheme is a beautiful language, and I've taken a couple of stabs at learning it, but I still don't know my cdr from a hole in the ground! Back then, I eventually found a web based viewer hosted on a server by Scott Ananian which did grok the expressions correctly (as far as I could tell), but Scott got his PhD and the server which sat under his desk at MIT is no more. He sent me his Java sources which must be served up by Tomcat. To me, it's more Boustrophedon! Thank you Stefan for checking my stuff. I hope it stack dumps for you so you'll have an easy time fixing it. I understand your reluctance to change your parser when it does everything you need for gEDA. I may have a look at gerber2pdf. At least it's written in Python, a language I use often, and there may be some hope of understanding it. Thanks again for looking. Jim _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
