Agreed. It seems like it would be real handy to have position() take
an argument:
position(../s[])
and return the position of the matching items...
The position of what item in what sequence?
or loosen the
restrictions on position() in a for expression, or have a different
function where you could get the position in a for expression:
for $i in ../s
if (...) then $i/position() else ()
This all depends on maintaining more context, and we've arguably got too
much context-sensitivity already, especially in XSLT.
It would be much cleaner with a higher-order function, which you can
write in XSLT/XPath 2.1:
<xsl:function name="f:index-of" as="xs:integer*">
<xsl:param name="sequence" as="item()*"/>
<xsl:param name="test" as="function(item()) as xs:boolean"/>
<xs:sequence select="for $i in 1 to count(sequence) return
$i[$test($seq[$i])]"/>
</xsl:function>
then
f:index-of(../c, function($c){matches($c, $regex)})
Michael Kay
Saxonica
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