>&#160;<span class="keyword">namespace </span>thread {</div><div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;</div><div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;</div><div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;<span class="keyword">template</span> &lt;</div><div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;  <span class="keyword">typename</span> ElementOutput_,                         