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Re: [xsl] analyze-string gotcha/reminder


Subject: Re: [xsl] analyze-string gotcha/reminder
From: David Carlisle <davidc@xxxxxxxxx>
Date: Mon, 19 Nov 2012 15:28:42 +0000

On 19/11/2012 15:15, Dimitre Novatchev wrote:
It would be helpful if an XSLT processor issues a warning message
when a single `{` and `}` are used in a regex -- this would
immediately explain to the user the issue and the correction to be
made.

But in a lot (most?) cases there would be no correction needed as an AVT was intended. I 'm not sure the system can easily suspect that the wrong usage has been used unless it is the special case that a single { has been used and can be evaluated at compile time and the resulting regex is a regex syntax error. But that generates an error not a warning. A case like \d{4} which generates the perfectly legal regex \d4 is a lot harder to generate a warning for, unless you generate a warning for _all_ uses of AVT in the regex string which would be annoying after a while,

David

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