Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!enother.net!enother.net!peer01.iad.highwinds-media.com!news.highwinds-media.com!feed-me.highwinds-media.com!border1.nntp.dca1.giganews.com!nntp.giganews.com!news.iecc.com!.POSTED!nerds-end From: Stefan Monnier Newsgroups: comp.compilers Subject: Re: LR(1) Parsing : Error Handling & Recovery Date: Sun, 20 Jul 2014 10:28:23 -0400 Organization: A noiseless patient Spider Lines: 9 Sender: news@iecc.com Approved: comp.compilers@iecc.com Message-ID: <14-07-043@comp.compilers> References: <14-07-023@comp.compilers> <14-07-024@comp.compilers> <14-07-026@comp.compilers> <14-07-027@comp.compilers> <14-07-029@comp.compilers> <14-07-032@comp.compilers> <14-07-034@comp.compilers> <14-07-037@comp.compilers> NNTP-Posting-Host: news.iecc.com Mime-Version: 1.0 Content-Type: text/plain X-Trace: miucha.iecc.com 1405895207 57798 2001:470:1f07:1126:0:676f:7373:6970 (20 Jul 2014 22:26:47 GMT) X-Complaints-To: abuse@iecc.com NNTP-Posting-Date: Sun, 20 Jul 2014 22:26:47 +0000 (UTC) Keywords: parse Posted-Date: 20 Jul 2014 18:26:47 EDT X-submission-address: compilers@iecc.com X-moderator-address: compilers-request@iecc.com X-FAQ-and-archives: http://compilers.iecc.com X-Received-Bytes: 1452 X-Received-Body-CRC: 4193533133 Xref: csiph.com comp.compilers:1333 > IMO a correct PEG parser generator should warn about ambiguities in the > grammar, just as every other parser generator does. AFAIK, there can't be ambiguities in a PEG grammar, because the PEG semantics explicitly have a "use the first match" semantics. Stefan