I *think* David's point is that the problem is mathematically insoluble: the
grammar for regular expressions is recursive, and regular expressions are
not powerful enough to process a language whose grammar is recursive.
Sorry I suggested it!
Michael Kay
http://www.saxonica.com/
-----Original Message-----
From: bryan rasmussen [mailto:rasmussen(_dot_)bryan(_at_)gmail(_dot_)com]
Sent: 15 April 2007 09:45
To: xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
Subject: Re: [xsl] check the type of the $pattern argument to
a regular expression?
I thought that was the most likely solution, although it
might be that one would want to break the task into a
template and a number of regular expressions, anyway I was
wondering if anyone knew of such a solution already?
cheers,
Bryan Rasmussen
On 4/15/07, David Carlisle <davidc(_at_)nag(_dot_)co(_dot_)uk> wrote:
Short of writing a regular expression that only matches valid
regular expressions (which sounds like an interesting
exercise for
the reader),
along with other interesting exercises like trisecting angles and
squaring the circle, presumably:-)
David
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