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From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@des.no>
To: Roman Divacky <rdivacky@freebsd.org>
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Date: Wed, 10 Feb 2010 13:23:20 +0100
In-Reply-To: <20100210121401.GA81144@freebsd.org> (Roman Divacky's message of
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Cc: Andrew Brampton <brampton+freebsd@gmail.com>,
	Garrett Cooper <yanefbsd@gmail.com>, freebsd-hackers@freebsd.org
Subject: Re: sysctl with regex?
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Roman Divacky <rdivacky@freebsd.org> writes:
> "Dag-Erling Sm=C3=B8rgrav" <des@des.no> writes:
> > Formally, a regular expression is a textual representation of a
> > finite state machine that describes a context-free grammar.
> I dont think so.... regular expressions describe regular languages
> which are a strict subset of context free languages.  The practical
> difference is that you cannot describe for example expressions with
> parenthesis with a regular expression while you can with a context
> free grammar...

You mean nested parentheses?  You're right, I didn't think of that.

DES
--=20
Dag-Erling Sm=C3=B8rgrav - des@des.no