Re: [xsl] XPath 2.0 function polymorphism

[David Carlisle <davidc@xxxxxxxxx>]

You should look at Dimitre's FXSL library; he has elevated using elements
to act as proxies for functions into an art form:-)

For literals, since there are not so any base types (although there
could be a lot less) you can probably just use xsl:choose, something like:


    <xsl:function name="ns:func">
      <xsl:param name="arg" as="node()"/>
      <xsl:choose>
       <xsl:when test="$arg instance of xs:integer">
         <xsl:sequence select="ns:func-integer($arg)"/>
       </xsl:when>
       <xsl:when test="$arg instance of xs:string">
         <xsl:sequence select="ns:func-string($arg)"/>
       </xsl:when>
          ...
       <xsl:otherwise>
      <xsl:apply-templates select="$arg" mode="ns:func"/>
      </xsl:otherwise>
     </xsl:choose>
    </xsl:function>

David

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