Re: [lojban] PEG question

[Robin Lee Powell <rlpowell@digitalkingdom.org>]

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
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