 -----------------------------------------------------------------------</span></div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;    <span class="comment">// Unimplemented constructors and operators</span></div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;    <span class="comment">// -----------------------------------------------------------------------</span></div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&