ntifier">mpl</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span><span class="identifier">MemberFunction_ParameterTypes</span><span class="special">&gt;,</span> <span class="comment">// optional, can be any mpl forward sequence</span>
  <span class="identifier">boost</span><span class="special">::</span><span class="identifier">function_types</span><span class="special">::</span><span class="identifier">SomeTagType</span>                 <span class="c