s="identifier">ExtendedSlotFunction</span>                                                               <a name="boost.signals2.signal.extend_1_3_37_6_9_3_1_2_12"></a><span class="identifier">extended_slot_function_type</span><span class="special">;</span>
  <span class="keyword">typedef</span> <span class="keyword">typename</span> <a class="link" href="slot.html" title="Class template slot">signals2::slot</a><span class="special">&lt;</span><span class="identifier">R</span> <span class="special">(</span><