special">{</span>
<span class="keyword">public</span><span class="special">:</span>
  <span class="comment">// types</span>
  <span class="keyword">typedef</span> <span class="identifier">T</span> <a name="boost.signals2.last_value.result_type"></a><span class="identifier">result_type</span><span class="special">;</span>

  <span class="comment">// <a class="link" href="last_value.html#id-1_3_37_6_5_1_1_1_5-bb">invocation</a></span>
  <span class="keyword">template</span><span class="special">&lt;</span><sp