Re: [xml-dev] How to count number of "concat()" args in XPath expression

[Olivier JEULIN <olivier.jeulin@gmail.com>]

Did you try to replace
concat( a, b, … )
 with
count(( b, b, … ))
?

2013/8/29 Hermann Stamm-Wilbrandt <STAMMW@de.ibm.com>:
>
> I wanted to know the (huge) argument number count of a "concat()" call in
> a customer stylesheet.
>
> Since I did not want to write my own XPath expression parser I made use of
> the "Too many arguments to user-created function" error of DataPowwer XSLT
> Processor. As can be seen below Saxon 6.5.5 (XSLT 1.0) processor can be
> used for that, too.
>
> I created a small stylesheet with a "func:concat()" user defined function.
> In that I inserted 900 parameters created by
> $ for((p=100; p<1000; ++p)) do echo "<xsl:param name=\"$p\"/>"; done
>
> Finally I modified "concat()" call to "func:concat()".
>
> Binary search and recompile finally identified the argument count 814(!).
>
> My question is, whether determining the argument count can be achieved
> easier (with any tool/language). Can XSLT 2.0 (3.0) help here?
>
>
> <xsl:stylesheet version="1.0"
>   xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
>    xmlns:func="http://exslt.org/functions";
>>
>   <func:function name="func:concat">
> <xsl:param name="a100"/>
> <xsl:param name="a101"/>
> ...
> ...
> <xsl:param name="a911"/>
> <xsl:param name="a912"/>
> <!--<xsl:param name="a913"/>-->
>     <func:result select="$a912"/>
>   </func:function>
> ...
> ...
>   <xsl:template match="/">
>                 <xsl:value-of select="func:concat('SELECT',
> ...
>
>
> Mit besten Gruessen / Best wishes,
>
> Hermann Stamm-Wilbrandt
> Level 3 support for XML Compiler team and Fixpack team lead
> WebSphere DataPower SOA Appliances
> https://www.ibm.com/developerworks/mydeveloperworks/blogs/HermannSW/
> https://twitter.com/HermannSW/     http://www.stamm-wilbrandt.de/ce/
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