Perl 6 - the future is here, just unevenly distributed

IRC log for #marpa, 2016-10-13

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Time Nick Message
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01:48 Topic for #marpa is now Start here: http://savage.net.au/Marpa.html - Pastebin: http://scsys.co.uk:8002/marpa - Jeffrey's Marpa site: http://jeffreykegler.github.io/Marpa-web-site/ - IRC log: http://irclog.perlgeek.de/marpa/today
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05:08 idiosyncrat_ Good night!
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07:03 Topic for #marpa is now Start here: http://savage.net.au/Marpa.html - Pastebin: http://scsys.co.uk:8002/marpa - Jeffrey's Marpa site: http://jeffreykegler.github.io/Marpa-web-site/ - IRC log: http://irclog.perlgeek.de/marpa/today
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08:50 harrysimons Hello! How do I debug problems in my grammar?
08:53 harrysimons When I say,
08:53 harrysimons Marpa::R2::Scanless::G->new( { source => \$dsl } );
08:53 harrysimons
08:53 harrysimons , I get this error:
08:53 harrysimons Unnecessary unit rule in priority rule at /usr/local/lib/x86_64-linux-gnu/​perl/5.22.1/Marpa/R2/MetaAST.pm line 882.  ... Marpa::R2 exception at <PROGRAM> line <LINE>
08:53 harrysimons
08:53 harrysimons My grammar is VERY long, how do I debug it?
08:57 harrysimons If I make some changes based on some guess-work, I get this error instead:
08:57 harrysimons Parse of BNF/Scanless source failed:
08:57 harrysimons No parse.  ... Marpa::R2 exception at <PROGRAM> line <LINE>
08:57 harrysimons So, how do I get more details?
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21:13 ronsavage harrysimons: Hi. I suggest you start with a tiny grammar and slowly build it up. Your progress will be faster that way.
21:15 ronsavage Also, via http://savage.net.au/Marpa.html you'll find the FAQ which should give you details on how to ask Marpa for details.
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