ntifier">destination</span><span class="special">()</span> <span class="keyword">const</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">destination_</span><span class="special">;</span> <span class="special">}</span>

 <span class="keyword">private</span><span class="special">:</span>
  <span class="keyword">friend</span> <span class="keyword">struct</span> <span class="identifier">detail</span><span class="special">::</span><span class="identifier">directiv