recursive function problem

cnatale · April 2nd, 2008, 12:00 PM

Hello,

I'm having trouble understanding why the following recursive function is generating an error:

Code:

  <xsl:template name="removeEndingChars">
    <xsl:param name="currStr" select="tst"/>
    <xsl:variable name="strLen" select="string-length($currStr)"/>
    <xsl:comment>Keep stripping end character until we reach a space, then display it</xsl:comment>

    <xsl:if test="substring($currStr, $strLen - 1, $strLen) = ' '">
      <xsl:value-of select="normalize-space($currStr)"/>...
    </xsl:if>

    <xsl:if test="substring($currStr, $strLen - 1, $strLen) != ' '">
      <xsl:variable name="splitStr" select="substring($currStr, 1, $strLen - 1)"/>
      <xsl:call-template name="removeEndingChars">
     <xsl:with-param name="currStr" select="$splitStr"/>
      </xsl:call-template>
    </xsl:if>

  </xsl:template>

The error is generated when I include the recursive call-template in the second if statement. Any help would be greatly appreciated.

mhkay · April 2nd, 2008, 03:54 PM

Please tell us what the error is. The error message might be meaningless to you, but it's very likely to meaningful to someone more experienced, and it's the obvious starting place for investigating the problem.

Michael Kay
http://www.saxonica.com/
Author, XSLT Programmer's Reference and XPath 2.0 Programmer's Reference

samjudson · April 3rd, 2008, 03:11 AM

I suspect that the error is either a stack overflow or some kind of infinite recursion error.

Now you know this, and if you guess the reason for this is that the first <xsl:if> is always false, maybe you can try and figure out why that might be.

/- Sam Judson : Wrox Technical Editor -/