span><span class="special">:</span>
  <span class="comment">// <a class="link" href="signal.html#boost.signals2.signaltypes">types</a></span>
  <span class="keyword">typedef</span> <span class="identifier">Signature</span>                                                                          <a name="boost.signals2.signal.signature_type"></a><span class="identifier">signature_type</span><span class="special">;</span>             
  <span class="keyword">typedef</span> <span class="keyword">typename</span