Thank you both! I will merge your grammars into one beautiful and Mozilla approved kv-parser :-)
Lpeg is so much nicer than writing miles of unreadable regular expressions! Thanks again, Anton 2015-02-01 19:18 GMT+01:00 Michael Trinkala <[email protected]>: > Oops, didn't respond to all yesterday... > > > ---------- Forwarded message ---------- > From: Michael Trinkala <[email protected]> > Date: Sat, Jan 31, 2015 at 2:16 PM > Subject: Re: [heka] Help with lpeg grammar for KV-tuples > To: Anton Lindström <[email protected]> > > > Added the message grammar and cleaned up the pair grammar. > http://lpeg.trink.com/share/12944348678422514771 > > Trink > > On Sat, Jan 31, 2015 at 5:11 AM, Anton Lindström < > [email protected]> wrote: > >> Hi! >> >> I'm trying to write a lpeg grammar for parsing key-value tuples with a >> "suffix message". I got the key-value part working, but I can't figure out >> how to extract the rest of the message. >> My input data looks like this: >> >> x="a string" status=200 hello world >> >> I want to parse this into: >> message: "hello world" >> x: "a string" >> status: 200 >> >> The grammar currently looks like this ( >> http://lpeg.trink.com/share/17121232195128835076): >> >> local l = require 'lpeg' >> l.locale(l) >> local sp = l.space >> local key = l.C((1 - l.S('= '))^1) >> local rawString = l.C((1 - sp)^1) >> local quotedString = l.C((l.P('\\"') + (1 - l.P('"')))^0) >> local integer = l.digit^1 / tonumber >> >> >> local double = l.digit^1 * "." * l.digit^1 / tonumber >> >> local pair = ( >> l.Cg(key * "=" * '"' * quotedString * '"' ) + >> l.Cg(key * "=" * (double + integer + rawString)) >> ) * sp^0 >> >> grammar = l.Cf(l.Ct("") * pair^0, rawset) >> >> >> I don't understand how to extract "hello world" into the result table. >> Any pointers on how to do this? >> >> >> Thanks, >> Anton >> >> _______________________________________________ >> Heka mailing list >> [email protected] >> https://mail.mozilla.org/listinfo/heka >> >> > > > _______________________________________________ > Heka mailing list > [email protected] > https://mail.mozilla.org/listinfo/heka > >
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