* xml count() failing
@ 2010-04-17 19:40 Hans van der Meer
2010-04-18 21:06 ` Hans Hagen
0 siblings, 1 reply; 2+ messages in thread
From: Hans van der Meer @ 2010-04-17 19:40 UTC (permalink / raw)
To: NTG ConTeXt
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?
Hans van der Meer
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^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: xml count() failing
2010-04-17 19:40 xml count() failing Hans van der Meer
@ 2010-04-18 21:06 ` Hans Hagen
0 siblings, 0 replies; 2+ messages in thread
From: Hans Hagen @ 2010-04-18 21:06 UTC (permalink / raw)
To: mailing list for ConTeXt users
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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___________________________________________________________________________________
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