omment">// optional, can be any FunctionTypes tag type</span>
  <span class="special">&gt;::</span><span class="identifier">value</span>

<span class="identifier">OR</span>

<span class="identifier">has_member_function_AMemberFunction</span>
  <span class="special">&lt;</span>
  <span class="identifier">MemberFunction_ReturnType</span> <span class="special">(</span><span class="identifier">Enclosing_Type</span><span class="special">::*)</span> <span class="special">(</span><span class="identifier">MemberFun