pan> Arg2<span class="special">&gt;</span> 
  <a class="link" href="nil.html" title="Struct nil">nil</a> <a name="idp60407776-bb"></a><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><span class="identifier">Arg1</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">Arg2</span> <span class="keyword">const</span> <span class="special">&amp;</span><span cl