Hi! We implemented an AQL parser using JavaCC. My colleague Mikael Nystr?m made some transformations to make the published AQL grammar work in JavaCC. Mikael is on vacation right now, but I'm sure he does not mind sharing his experiences once he gets back.
I do think it would be interesting to switch to ANTLR sooner or later in order to share efforts between projects with different implementation/target-languages and because the ANTLRWorks environment http://www.antlr.org/works/index.html looks promising compared to the pretty bad JavaCC-plugin in e.g. Eclipse. Our parser (and thus also the modified grammar) will soon be open sourced so you are free to use it. So if you are not in an extreme hurry I'd suggest using or getting inspiration from what we have already done. Best regards, Erik Sundvall erik.sundvall at liu.se http://www.imt.liu.se/~erisu/ Tel: +46-13-286733 On Wed, Jan 4, 2012 at 16:37, Seref Arikan < serefarikan at kurumsalteknoloji.com> wrote: > Greetings, > The AQL grammar from the wiki has direct and indirect left recursion. > Which means without changes in the grammar, LL parser generators (both > JavaCC and Anltr) can't generate parsers for this grammar. > > I'm curious if anybody has refactored this grammar for LL parser > generators. Shinji? Your latest release includes an AQL parser does not it? > Could you please share your method? I can always look at the code, but > you'd probably save me time :) > > I'm interested in experiences of others too. > > > Kind regards > Seref > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openehr.org/mailman/private/openehr-technical_lists.openehr.org/attachments/20120105/65a8a13f/attachment.html>
