trier@cwlim.INS.CWRU.Edu (Stephen C. Trier) (06/07/91)
In article <1991Jun4.233010.7375@murdoch.acc.Virginia.EDU>, plh@cad.cs.Virginia.EDU (Patrick L. Heck) writes: > I am in need of a DOS version of lex and yacc. > Is there anything available commercially or in > the public domain (especially via anon ftp)? Try the following: wuarchive.wustl.edu:/mirrors/msdos/txtutl/bison111.zip wuarchive.wustl.edu:/mirrors/msdos/txtutl/byacc.zip wuarchive.wustl.edu:/mirrors/msdos/txtutl/flex23.zip Bison is the Free Software Foundation's YACC replacement. It carries some licensing strings that may or may not be desirable in your project. BYACC is a port of Berkeley YACC, a completely public-domain yacc developed at Berkeley. I did an early port of this and found it to be quite useful. There are no licensing strings attached. Flex is "Fast Lex", developed at Berkeley and elsewhere. This has been adopted by the Free Software Foundation, but I believe that it carries a Berkeley-style "Do what you want, but don't hold us liable" copyright. Its output code is in the public domain -- no strings attached. I think you will find any of these tools to be stable enough for real-world programming. They are also substantially cheaper than MKS's commercial equivalents. (In other words, they're free.) Maybe this question should go in the Frequently Asked Questions list. I see it every month or two, and the usual response does not mention the free alternatives to the commercial lexes and yaccs. -- Stephen Trier "So don't expect replies for a day or two Case Western Reserve University (until the computing centre staff gets back Information Network Services from wherever they hide on weekends. ;-) )" trier@ins.cwru.edu - cplma@marlin.jcu.edu.au