">NextLayer</span><span class="special">&gt;</span>
<span class="keyword">class</span> <span class="identifier">stream</span>
<span class="special">{</span>
    <span class="identifier">NextLayer</span> <span class="identifier">next_layer_</span><span class="special">;</span>
    <span class="special">...</span>
<span class="special">}</span>
</pre>
                          </td>
<td>
<pre xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="table-programlisting"><span class="keyword">