How about using something like: 
Identifier: ReservedWord
            { 
              print "can't use reserved word $item[1]\n"; 
              # Do the thing that makes P::RD throw an error
            }
          | IdentifierName

[download]
There is a way in P::RD to create 'error productions' I just don't remember what you have to do to make the matching of a production be a syntax error in the input.

/\/\averick
perl -l -e "eval pack('h*','072796e6470272f2c5f2c5166756279636b672');"

In reply to Re: Parse::RecDescent - Excluding a Subset of Atoms From a Production Rule by maverick
in thread Parse::RecDescent - Excluding a Subset of Atoms From a Production Rule by Incognito

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