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From: Jonathan Roewen <jonathan.roewen@gmail.com>
Cc: caml-list@yquem.inria.fr
Subject: Re: [Caml-list] ocamllex+ocamlyacc and not parsing properly
Date: Mon, 8 Aug 2005 14:17:51 +1200	[thread overview]
Message-ID: <ad8cfe7e0508071917d4d57f9@mail.gmail.com> (raw)
In-Reply-To: <200508080058.12357.jon@ffconsultancy.com>

> So you're lexer is emitting the tokens str, com, str, com, str, eol but your
> parser looks as though it is expecting str, com, str, str, str, eol.
> 
> I'm guessing the error is in the lexer because the grammar in the parser is
> very simple. So ":Sovereign.Wyldryde.org" is lexed by "message" into str, " "
> then invokes "command" which parses 254 into com, " " then invokes "param"
> which parses "dst" into str, "param" then invokes the remaining into strs.
> 
> However, that can't be correct because the lexer has clearly gone back into
> "command" in order to emit "Irc_types.Numeric 112".
> 
> It's just a guess, but have you assumed that each time the lexer is invoked by
> the parser that it starts in the rule it was left in when, in fact, the
> parser invokes the "message" rule every time?

Yes, I assume it continues lexing where it left off. If this is not
the case, what's the best way to do conditional parsing??

Jonathan


  reply	other threads:[~2005-08-08  2:17 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-08-07 21:39 Jonathan Roewen
2005-08-07 21:54 ` Jonathan Roewen
2005-08-07 23:58 ` Jon Harrop
2005-08-08  2:17   ` Jonathan Roewen [this message]
2005-08-08  4:23     ` Jonathan Roewen
2005-08-08  5:03       ` Jonathan Roewen
2005-08-08  6:39         ` Jon Harrop
2005-08-08  6:47           ` Jonathan Roewen
2005-08-08  8:59       ` skaller

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