n class="keyword">const</span> <span class="identifier">VoidAllocator</span> <span class="special">&amp;</span> <span class="special">=</span> <span class="identifier">VoidAllocator</span><span class="special">(</span><span class="special">)</span><span class="special">,</span> 
                      <span class="keyword">const</span> <span class="identifier">Deleter</span> <span class="special">&amp;</span> <span class="special">=</span> <span class="identifier">Deleter</span><span class="special">(</span>