Bison Parser negate production rules

royzlife@gmail.com
23 Mar 2007 22:16:22 -0400

          From comp.compilers
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Bison Parser negate production rules royzlife@gmail.com (2007-03-23)
Re: Bison Parser negate production rules gneuner2@comcast.net (George Neuner) (2007-03-26)
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Re: Bison Parser negate production rules mco333@sympatico.ca (mco333) (2007-03-27)
Re: Bison Parser negate production rules gneuner2@comcast.net (George Neuner) (2007-03-27)
Re: Bison Parser negate production rules cfc@shell01.TheWorld.com (Chris F Clark) (2007-03-29)
Re: Bison Parser negate production rules Meyer-Eltz@t-online.de (Detlef Meyer-Eltz) (2007-03-29)
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From: royzlife@gmail.com
Newsgroups: comp.compilers
Date: 23 Mar 2007 22:16:22 -0400
Organization: Compilers Central
Keywords: yacc, parse, question, comment
Posted-Date: 23 Mar 2007 22:16:22 EDT

Can any one help in explaining how to negate a production rule in
Bison parser?
e.g A:B
            B: C
                    |D
                    |E
    (here i want to write a block of statements or rules which will be
executed if B doesnt match to C/D/E.)


[Basically, you can't other than by enumerating all of the other
possibilities. What do you really want to do here? -John]

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