Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!iuvax!cica!ctrsol!emory!jdyx!tpf From: tpf@jdyx.UUCP (Tom Friedel) Newsgroups: gnu.utils.bug Subject: Bison behavior incompatible with yacc Message-ID: <1989Aug12.235041.11546@jdyx.UUCP> Date: 12 Aug 89 23:50:41 GMT Distribution: usa Organization: JDyx Enterprises (Atlanta GA) Lines: 21 After a very long time I have come to the conclusion that bison may not work if you have useless productions in your grammar. Yacc will simply ignore these, after warning the user. Bison also warns. Mail me if you want my specific example. The doc's say that bison is upward compatible for properly written grammar. I don't beleive that a useless rule constitutes an improper grammar. Thanks, Tom -- Tom Friedel Public Access Unix BBS tpf@prism.gatech.edu ...gatech!emory!jdyx!tpf (404) 320-7624 (404) 321-5020