Re: [xsl] xsl:variable ?

[Greg Faron <gfaron@xxxxxxxxxxxxxxxxxx>]

At 09:53 AM 4/10/2002, you wrote:
> <xsl:template name="foo">
>   <xsl:variable name="start_x" select="5"/>
>   <xsl:if test="true">
>     <!-- use the variable and add to it -->
>     <xsl:variable name="start_x" select="10"/>

The new variable created here is only within the scope of the if-block.

>   </xsl:if>
>   <!-- if i use start_x here it just contains 5 and not 10 -->
>   <xsl:value-of select="$start_x"/>
> </xsl:template>
>
> I have read that xsl:variables are constant so it
> would seem that I can not change the value of my
> variable, but if this is the case then how can I work
> around this problem? I need to store a value to use it
> later and manipulate the variable?!

  Use recursion and call your named template with a starting parameter.

<xsl:template name="foo">
  <!-- Default value of 5 if none given -->
  <xsl:param name="start_x" select="5"/>
  <xsl:if test="true">
    <xsl:call-template name="foo">
      <xsl:with-param name="start-x" select="$start_x + 5"/>
    </xsl:call-template>
  </xsl:if>
  <xsl:value-of select="$start_x"/>
</xsl:template>

  The above template is infinitely recursive because you didn't really 
provide a purpose for your template.  I therefore have no idea what your 
criteria for stopping is.  You'll probably want to add a second param that 
will get progressively smaller with each recursive call.


Greg Faron
Integre Technical Publishing Co.



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