Perl 6 - the future is here, just unevenly distributed

IRC log for #marpa, 2017-04-06

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Time Nick Message
00:16 idiosyncrat joined #marpa
00:18 idiosyncrat btw just in case some following the answers to VsyachePuz's question wonder why the answer is kind of "Impossible, but this is how it could be done"
00:19 idiosyncrat It's impossible in *the general case* -- no solution works using Earley's for all strings and and grammars.
00:19 idiosyncrat It becomes possible
00:19 idiosyncrat 1.) With side-processing and/or post-processing;
00:20 idiosyncrat 2.) for a specific input prefix (or input string); and
00:20 idiosyncrat 3.) with a specific grammar.
00:20 idiosyncrat So the two answers are very different because the questions are very different.
01:04 ronsavage JK: To turn this 'match x except y' into an FAQ, perhaps your 3 points could reference external parsing explicitly. IOW I'm not sure yet how to phrase this.
01:48 ilbot3 joined #marpa
01:48 Topic for #marpa is now Start here: http://savage.net.au/Marpa.html - Code paste: 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 - Youtube channel: https://www.youtube.com/channel/UCYKVfGBtfTqbs1JdYq-dc5g
01:48 idiosyncrat ronsavage: I think this is a research question and so not really FAQ-able at this point.
01:49 idiosyncrat VsyachePuz: your point is good.  You may want to repeat it because our ilbot3 (our log bot) took a break at that point.
01:52 idiosyncrat ronsavage: OTOH maybe you and jdurand can work up an answer that refers to his work as an example of one approach to implementing a complement operator.
01:56 ronsavage I think something needs to be said since it's a question which will come up repeatedly.
02:00 idiosyncrat ronsavage: Good point.  But my thought was that those asking would be more interested in jdurand's basis for a possible solution, than in my theoretical musings. :-)
02:01 idiosyncrat I'd look over the final result, of course.
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04:43 jeffreykegler Good night!
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04:53 ronsavage The new FAQ re complements of a pattern. Proof-reading invited: http://savage.net.au/Perl-modules/html/marpa.faq/faq.html#q146.
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14:43 idiosyncrat https://github.com/ronsavage/marpa.faq/issues/5
14:44 idiosyncrat ronsavage: Very nice job on the new FAQ.
14:44 idiosyncrat I do have some suggested changes.
14:44 idiosyncrat See the above linked Github issue.
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14:49 idiosyncrat_ jdurand: Are the links to your work that Ron uses in the new FAQ question the ones most likely to last?
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19:09 idiosyncrat Maybe my next Marpa::R3 feature should be a complement operator?
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23:16 ronsavage The FAQ re complements has been updated on-line.

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