[Moose-dev] Re: Anyone can explain this PParser behaviour?

Le 31/01/2016 11:44, Nicolas Anquetil a écrit : > > > On 31/01/2016 07:07, Tudor Girba wrote: >> Would it be possible to provide an isolated case so that we can debug >> this? > the isolated test case is in the mail > for the grammar, I am afraid this will be difficult. > It is not my grammar but the postgres sql one that Anne and Olivier are > creating. > It is their first grammar and despite their best efforts, it shows > (without blaming anyone, we all know how difficult it can be to create a > full-fledged grammar, and frankly full postgres is proving far more > complex that I would have ever thought) Most languages have quirks in the grammar which makes it difficult. Unexpectedly, LR/LALR type approaches may help because they point out inconsistencies at the grammar compilation stage. > I am trying to rationalise and simplify their grammar to understand > these problems Probably the right approach. A simple test I'd do is take parts of it and have a look to the conflicts raised in SmaCC... The grammar syntax is so similar between both that you can switch between the two technologies, and, anyway, given it is a full-fledged grammar, in won't be any longuer in any of the parser tech available. Thierry _______________________________________________ Moose-dev mailing list Moose-dev(a)list.inf.unibe.ch https://www.list.inf.unibe.ch/listinfo/moose-dev