n class="keyword">typedef</span> <span class="keyword">void</span>                                  <a name="boost.log.basic_formatter.result_type"></a><span class="identifier">result_type</span><span class="special">;</span>  <span class="comment">// Result type. </span>
  <span class="keyword">typedef</span> <span class="identifier">CharT</span>                                 <a name="boost.log.basic_formatter.char_type"></a><span class="identifier">char_type</span><span class="special">;</span>    <span