Hierarchical matches do not work correctly across a py:match

[Matt Chaput <matt@…>]

In the following example, the second py:match (a/b) should match the <b /> below, but because the surrounding <a> element is a py:match, the hierachical match apparently does not see the a tag.

from genshi.template import MarkupTemplate

tmpl = MarkupTemplate("""<?xml version="1.0" ?>
<test xmlns:py="http://genshi.edgewall.org/">
    <py:match path="a">${select('*')}</py:match>
    <py:match path="a/b">Right</py:match>
    <py:match path="b">Wrong</py:match>
    
    <a><b /></a>
</test>
""")

print unicode(tmpl.generate())

[Matt Chaput <matt@…>]

It seems like the path matches the generated parent, not the original parent. Which may be a limitation of Genshi, but makes it hard/impossible to use py:match in a hierarchical XSLT-like way in many cases.

[cmlenz]

See also #186.

[cmlenz]

Okay, here's an explanation of the behavior (at least since [810], see also #186):

The first match template matches the <a> element, and basically produces <b /> due to the select("*") expression. The second match template doesn't match anything, as the first removed the <a> tag. The third then matches the <b /> tag.

You'd need to use select(".") for this example to make sense, as that doesn't strip off the <a> tags.