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Date: Sat, 7 Apr 2012 10:53:04 -0300
From: andrew cooke <and...@acooke.org>
To: lepl@googlegroups.com
Subject: Re: [LEPL] Re: Run-length encoded input?
Message-ID: <20120407135304.GA9482@acooke.org>
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 <15492517.1421.1333759977791.JavaMail.geo-discussion-forums@yneo2>
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I have a solution for this.  It only works in a small number of cases (ie it
works for repetition, but it's not a general fix that makes Lepl more dynamic
everywhere), and I need to release a new minor version of Lepl to support it.
I probably won't have time to do that today (hosting a birthday party!), but
expect to do so tomorrow (Sunday).

Cheers,
Andrew


On Fri, Apr 06, 2012 at 05:52:57PM -0700, Andrew Cooke wrote:
> 
> hmmm.  that's a good question.  unfortunately, i think the answer is no, 
> it's not possible.
> 
> it might be possible to hack something up.  i'll have a think and get back 
> to you sometime this weekend.  but there is no simple, direct way of doing 
> this that i can think of (i think there should be - this kind of thing is 
> expected in a python library - but the way that lepl is implemented makes 
> it difficult).
> 
> sorry,
> andrew
> 
> 
> On Friday, April 6, 2012 9:36:28 PM UTC-3, maaku wrote:
> >
> > Hi, I hope someone can help me with this somewhat newb-ish question. I'm 
> > trying to write a parser for a binary syntax that uses run-length encoding. 
> > In essence, it looks like the following:
> >
> > lepl.UnsignedInteger & ~lepl.Literal(':') & lepl.Any()[LENGTH]
> >
> > Where LENGTH is the result of the matching UnsignedInteger. However I can 
> > think of no way to make this value available at that position in the code. 
> > Is this possible within LEPL?
> >
> > Kind regards,
> > Mark
> >
> 
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