       <a name="boost.log.expressions.max_size_decorato_idm27858.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;</span> <span class="identifier">char_type</span> <span class="special">&gt;</span>        <a name="boost.log.expressions.max_size_