[lxml-dev] Use of XPathEvaluator object in extension functions?

[Stefan Behnel]

Hi,

I just looked through the documentation a bit and started rewriting xpath.txt
for the new Namespace API. I never actually thought much about it, but the
docs made me stumble over the fact that extension functions take the
XPathEvaluator object as first parameter. I don't really know what that is
good for. Has anyone used this feature so far? What purpose does it serve?

When I rewrote the implementation, I introduced a 'ContextBuilder', which is
now passed instead. I'm wondering if that can fulfil the original intention...

Can anyone enlighten me?

Stefan