/span> <a name="idp60403296-bb"></a><span class="identifier">any_cast</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre></li>
<li class="listitem"><pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> Arg1<span class="special">&gt;</span> <a class="link" href="nil.html" title="Struct nil">nil</a> <a name="idp60405264-bb"></a><span class="keyw