ier">char_type</span> <span class="special">&gt;</span> <a name="boost.log.expressions.wrapped_formatter_actor.terminal_type"></a><span class="identifier">terminal_type</span><span class="special">;</span>  <span class="comment">// Base terminal type. </span>
  <span class="keyword">typedef</span> <span class="identifier">ActorT</span><span class="special">&lt;</span> <span class="identifier">terminal_type</span> <span class="special">&gt;</span>                                <a name="boost.log.expressions