Re: [xsl] Why does my XSLT produce a Warning message with never-executed code that divides a blank by 10?

["Imsieke, Gerrit, le-tex gerrit.imsieke@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

Hi Roger,

I don't know why Saxon doesn't determine that the xs:integer() branch will only be reached when normalize-space($test) has a length > 0.

Interestingly, there is no warning (only a dynamic error when executing) for

$test ! xs:integer(.) div 10

Maybe generate the following expression, it won't cause a warning either, and it will give the same result as your code (with an additional check that $test is actually castable as xs:integer):

$test[. castable as xs:integer] ! xs:integer(.) div 10

or for XPath 2.0

for $t in $test[. castable as xs:integer] return xs:integer($t) div 10

Gerrit


On 31.03.2024 09:56, Roger L Costello costello@xxxxxxxxx wrote:
> Hi Folks,
>
> I have a program that generates this XSLT code:
>
> <xsl:template match="/">
>          <xsl:variable name="test" select="'    '" as="xs:string"/>
>          <xsl:value-of select="
>              if (normalize-space($test) eq '') then ()
>              else xs:integer($test) div 10"/>
> </xsl:template>
>
> When I execute that XSLT code, I get this warning message:
>
> Warning: SXWN9000  Evaluation will always throw a dynamic error: Cannot convert zero-length string to an integer
>
> Why am I getting that Warning message? This:
>   
> xs:integer($test) div 10
>
> will never be executed because of this:
>
> if (normalize-space($test) eq '') then ()
>
> So I don't understand why I am getting the Warning message.
>
> How can the XSLT code be written so that, when executed, it doesn't produce a Warning message? Note: recall that I have a program that generates the XSLT code. Sometimes the program generates $test with a blank value, other times the program generates $test with a numeric value. The generated XSLT code needs to work with both cases.
>
> /Roger
>     

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