[antlr-interest] exit status from ANTLR generated parser

[Bruce Bauman]

I'm using ANTLR V3 from a Pascal grammar. When I get a parse failure,
the java VM still exits with a 0 exit status, so I can't check for
failure from the shell script that is running the parser.

Any hint on how to get a proper exit status on error?

Thanks.

-- Bruce
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