From lojban+bncCK30vq5WEKry-fAEGgSdai-6@googlegroups.com Wed Jul 13 22:05:59 2011 Received: from mail-pv0-f189.google.com ([74.125.83.189]) by chain.digitalkingdom.org with esmtp (Exim 4.72) (envelope-from ) id 1QhE7Z-0006tc-BF; Wed, 13 Jul 2011 22:05:59 -0700 Received: by pvc22 with SMTP id 22sf5546444pvc.16 for ; Wed, 13 Jul 2011 22:05:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlegroups.com; s=beta; h=x-beenthere:received-spf:date:from:to:subject:message-id:references :mime-version:in-reply-to:user-agent:x-original-sender :x-original-authentication-results:reply-to:precedence:mailing-list :list-id:x-google-group-id:list-post:list-help:list-archive:sender :list-subscribe:list-unsubscribe:content-type:content-disposition; bh=Hn8MPPvNJWH81qpbsfJsJHeLiU+YX3lE38MW35+rivM=; b=ikis6Y/lNdUDS8Kurvn8xv2SCXfXe/ssumif73NFzGbBM67T6y94k8tfiwjAMe2mih eJVxfK4CGOxCL7dqBXbxJWJFUxA1fXSOSOI+dybSOf7bonSmO/ULXeI1NQzRyu+YF9+Y tNAP3oK4/uLnSfXKjkMOKT+jIQPey9///liIc= Received: by 10.68.46.4 with SMTP id r4mr493349pbm.66.1310619947000; Wed, 13 Jul 2011 22:05:47 -0700 (PDT) X-BeenThere: lojban@googlegroups.com Received: by 10.68.59.41 with SMTP id w9ls656870pbq.1.gmail; Wed, 13 Jul 2011 22:05:46 -0700 (PDT) Received: by 10.68.0.234 with SMTP id 10mr461128pbh.52.1310619946187; Wed, 13 Jul 2011 22:05:46 -0700 (PDT) Received: by 10.68.0.234 with SMTP id 10mr461127pbh.52.1310619946177; Wed, 13 Jul 2011 22:05:46 -0700 (PDT) Received: from chain.digitalkingdom.org (digitalkingdom.org [173.13.139.234]) by gmr-mx.google.com with ESMTPS id f8si32778858pbc.0.2011.07.13.22.05.45 (version=TLSv1/SSLv3 cipher=OTHER); Wed, 13 Jul 2011 22:05:45 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of rlpowell@digitalkingdom.org designates 173.13.139.234 as permitted sender) client-ip=173.13.139.234; Received: from rlpowell by chain.digitalkingdom.org with local (Exim 4.72) (envelope-from ) id 1QhE7L-0006tO-J2 for lojban@googlegroups.com; Wed, 13 Jul 2011 22:05:43 -0700 Date: Wed, 13 Jul 2011 22:05:43 -0700 From: Robin Lee Powell To: lojban@googlegroups.com Subject: Re: [lojban] PEG question Message-ID: <20110714050543.GQ18524@digitalkingdom.org> References: MIME-Version: 1.0 In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) X-Original-Sender: rlpowell@digitalkingdom.org X-Original-Authentication-Results: gmr-mx.google.com; spf=pass (google.com: best guess record for domain of rlpowell@digitalkingdom.org designates 173.13.139.234 as permitted sender) smtp.mail=rlpowell@digitalkingdom.org Reply-To: lojban@googlegroups.com Precedence: list Mailing-list: list lojban@googlegroups.com; contact lojban+owners@googlegroups.com List-ID: X-Google-Group-Id: 1004133512417 List-Post: , List-Help: , List-Archive: Sender: lojban@googlegroups.com List-Subscribe: , List-Unsubscribe: , Content-Type: text/plain; charset=ISO-8859-1 Content-Disposition: inline On Wed, Jul 13, 2011 at 11:51:50PM -0400, Frank wrote: > coi rodo > I am looking at the PEG and I see some definitions involve the '!' > operator. For example, > > BAhE-post <- si-clause? !ZEI-clause !BU-clause > > The PEG does not specify the meaning of '!' as far as I can observe. What do you mean by that? Our documentation doesn't, but that's because it's a basic part of the PEG design; http://en.wikipedia.org/wiki/Parsing_expression_grammar http://pdos.csail.mit.edu/~baford/packrat/ ( specifically, http://pdos.csail.mit.edu/~baford/packrat/popl04/ ) -Robin -- http://singinst.org/ : Our last, best hope for a fantastic future. Lojban (http://www.lojban.org/): The language in which "this parrot is dead" is "ti poi spitaki cu morsi", but "this sentence is false" is "na nei". My personal page: http://www.digitalkingdom.org/rlp/ -- You received this message because you are subscribed to the Google Groups "lojban" group. To post to this group, send email to lojban@googlegroups.com. To unsubscribe from this group, send email to lojban+unsubscribe@googlegroups.com. For more options, visit this group at http://groups.google.com/group/lojban?hl=en.