class="special">&gt;</span>
<span class="keyword">class</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">base_from_member</span>
<span class="special">{</span>
<span class="keyword">protected</span><span class="special">:</span>
    <span class="identifier">MemberType</span>  <span class="identifier">member</span><span class="special">;</span>

<span class="preprocessor">#if</span> <span class="emphasis"><em>C++11 is in use</em></span>
    <span class="keyw