Wouldn't that match everything?


----- Original message -----
From: "Yaron" <tclug at freakzilla.com>
To: "TCLUG" <tclug-list at mn-linux.org>
Date: Fri, 12 Jan 2007 14:37:59 -0600 (CST)
Subject: Re: [tclug-list] regular expression that never matches?

Can you do something like !"" ?


On Fri, 12 Jan 2007, Dan Drake wrote:

> I'm looking for a regular expression that's guaranteed to never match
> anything.
>
> I'm working with a Python script that parses LaTeX documents [1], and
> I'm using a regexp to find comments (beginning of line, any whitespace,
> then a percent sign: "^\s*%"). But in the middle of the verbatim
> environment, it shouldn't interpret anything as comments -- so I'd like
> to use some sort of regexp that never matches, so I can just switch the
> particular regexp object I'm using while parsing such an environment.
>
> Any suggestions? I could randomly generate a bizarre string (like
> "\y;$j[3o*6I[/W~fq\+l|~yr~as") which in practical terms will work, but
> that's an ugly solution.
>
> TIA for the help.
>
> Dan
>
>  1. http://www.pps.jussieu.fr/~beffara/soft/rubber/
> -- 
> Ceci n'est pas une .signature.
>


-Yaron

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