Re: [xsl] transforming XSLT files to use XSLT3 features

["John Lumley john@xxxxxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

On 11/02/2023 11:34, Chris Papademetrious 
christopher.papademetrious@xxxxxxxxxxxx wrote:
> The approach is limited by its use of template matches and regular 
> expressions. For some reason, I donbt feel inclined to write an XPath 
> grammar parser in XSLT. But still, some low-hanging fruit can be obtained.

Have a look at Gunther Rademacher's REx Parser Generator 
https://www.bottlecaps.de/rex/

It can be used to generate an XSLT parser for XPath 2. (I've used it 
extensively in the past for analysing XPath 3 expressions.)

An alternative, if your XSLT platform supports it, is to use an 
InvisibleXML parser https://invisiblexml.org/
There is an iXML grammar forB  XPath3.1 available 
(https://github.com/invisibleXML/ixml/tree/master/samples/XPath) which 
will also parse XPath2. You may be able to experiment with this using 
Martin Honnen's XSLT3 Fiddle 
(https://martin-honnen.github.io/xslt3fiddle/) which supports 
invisibleXML parsing functions.


John Lumley