RE: problem endless rekursion

This code:

<xsl:template match="option" mode="check">
  <xsl:variable name="correct_cells" 
        select=".|following-sibling::solution[valid_input = 1]" />
  <xsl:apply-templates select="$correct_cells" mode="check" />

certainly produces endless recursion, because the nodes selected by
apply-templates include the current node, and the same template rule
will be selected to process this node.

But I've no idea what the code was trying to achieve, so I've no idea
how it should be corrected.

Michael Kay  

> -----Original Message-----
> From: owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx 
> [mailto:owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx] On Behalf Of 
> Markus Hanel
> Sent: 06 November 2003 08:16
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject:  problem endless rekursion
> 
> 
> hallo,
> can you please help me with the following problem.
> the problem is to check a check box question. the correct 
> cells and the false cells should be added. the result are the 
> correct cells. there is a endless rekursion?????
> 
> xml part
> <CheckBoxQuestion>
>   <notice>in Europa kennen wir uns aus!</notice>
>   <question>Welche der nachfolgenden Länder gehören zur EU?</question>
>   <option number="1">
>     <text>Deutschland</text>
>     <solution type="bool" points="4" valid_input="1"></solution>
>   </option>
>   <option number="2">
>     <text>Schweiz</text>
>     <solution type="bool" points="5" valid_input="0"></solution>
>   </option>
>   <option number="3">
>     <text>Österreich</text>
>     <solution type="bool" points="6" valid_input="1"></solution>
>   </option>
>   <option number="4">
>     <text>Türkei</text>
>     <solution type="bool" points="7" valid_input="0"></solution>
>   </option>
> </CheckBoxQuestion>
> 
> xsl part
> <xsl:template match="CheckBoxQuestion" mode="table">
>   <xsl:apply-templates select="option" mode="check" /> </xsl:template>
> 
> 
> <xsl:template match="option" mode="check">
>   <xsl:variable name="correct_cells" select=".
> |following-sibling::solution[valid_input = 1]" />
>   <xsl:apply-templates select="$correct_cells" mode="check" />
> 
>   <xsl:variable name="false_cells" select=".
> |following-sibling::solution[valid_input = 0]" />
>   <xsl:apply-templates select="$false_cells" mode="check" />
> 
>     <xsl:variable name="correct" 
> select="count($correct_cells) - count($false_cells)" />
> 
>     <xsl:choose>
>       <xsl:when test="$correct &gt;= 0">
>         <td><xsl:value-of select="$correct" /></td>
>       </xsl:when>
>       <xsl:otherwise>
>         <td>0</td>
>       </xsl:otherwise>
>     </xsl:choose>
> 
> </xsl:template>
> 
> <xsl:template match="solution" mode="check">
> </xsl:template>
> 
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