ntifier">Arg2</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> Arg1<span class="special">,</span> <span class="keyword">typename</span> Arg2<span class="special">,</span> <span class="keyword">typename</span> Arg3<span class="special">&gt;</span> 
    <a class="link" href="nil.html" title="Struct nil">nil</a> <a 