class="comment">// types</span>
  <span class="keyword">typedef</span> <span class="identifier">CharT</span>                          <a name="boost.log.sinks.basic_event_log_backend.char_type"></a><span class="identifier">char_type</span><span class="special">;</span>                   <span class="comment">// Character type. </span>
  <span class="keyword">typedef</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_string</span><span class="special">&lt;