>pol</span><span class="special">)</span>
<span class="special">{</span>
   <span class="comment">/* Implementation goes here */</span>
<span class="special">}</span>

<span class="special">}}}</span> <span class="comment">// namespaces</span>
</pre>
<p>
        The following guidelines indicate what (other than basic arithmetic) can
        go in the implementation:
      </p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
            Error conditi