>exception_handler</a> <span class="special">{</span>
<span class="keyword">public</span><span class="special">:</span>
  <span class="comment">// types</span>
  <span class="keyword">typedef</span> <span class="identifier">HandlerT</span> <a name="boost.log.exception_handler.handler_type"></a><span class="identifier">handler_type</span><span class="special">;</span>  <span class="comment">// The exception handler type. </span>
  <span class="keyword">typedef</span> <span class="keyword">void</span>     <a 