[NTG-context] xml count() failing

Hans Hagen pragma at wxs.nl
Sun Apr 18 23:06:28 CEST 2010


On 17-4-2010 9:40, Hans van der Meer wrote:
> The xml-count() function does not result in 0 when none of the node
> sought is absent.
>
> In \writestatus{************}{<\xmlfilter{#1}{/img/count()}>}
> <node><img .../></node> correctly returns: ************ : <1>
>
> But in <node></node> one would expect the result to be zero but instead
> an error occurs: ************ : <>
>
> This is a nuisance because a simple \ifcase .. \or ... \else ... \fi now
> fails.
> ! Missing number, treated as zero.
> <to be read again>
> \relax
> \@@su:xml:case:frontfigure .../img/count()}\relax
> \ifcase
> Can this be remedied?

puzzles me as i return 0 in case of nil .. small example needed


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