Subject: Re: [xsl] xslt 2.0 regex and how to test it From: Florent Georges <darkman_spam@xxxxxxxx> Date: Sun, 19 Mar 2006 16:43:11 +0100 (CET) |
Manfred Staudinger wrote: > > <xsl:value-of select="replace(., '\[[^\]]+\]', '')"/> > Thanks for your solution, works perfect. > Let me try to verbalize the regex (" for better readability): > "\[[^\]]+\]" > the string starts with "[" and ends with "]": SingleCharEsc > "\[" and "\]" > in between there is a charGroup: "[]" > with a quantifier "+" for one or more occurrences > the charGroup is a negcharGroup, as it starts with: "^" > it contains one character "]": SingleCharEsc "\]", > thus allowing for one or more characters which are not "]". Perfectly right (I mean, it's what I'd have said). > I would prefer to try it out with an editor's find. To my > surprise your solution worked fine with SciTE. Ok. Regexps are supported in a lot of languages and tools. But with some differences and/or enhancements. Emacs for example have a tool that helps to build regexps: re-builder. Maybe your editor have such a functionality. If you are aware of these differences, it can be a good way to design a complex regexp. But it's not the way to learn a specific regexps language in particular, IMHO (here XPath 2.0 regexps). If you don't want to write each time an XSLT script and a input document to test one regexp, you can write an extension to your favorite editor. In Emacs, this could be done quite easily, I think. Or a specific client for your XSLT processor (for example a Java client for Saxon, taking a regexp and a text to test matching, and building a simple script from these). > One difference I noted was, that SciTE does not need > the SingleCharEsc within the charGroup. It's the way traditional regexps work. I must confess it's what I tried first. But Saxon gave me the right advice to escape it. A good thing IMHO, more rigorous. Regards, --drkm ___________________________________________________________________________ Nouveau : tiliphonez moins cher avec Yahoo! Messenger ! Dicouvez les tarifs exceptionnels pour appeler la France et l'international. Tilichargez sur http://fr.messenger.yahoo.com
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