<span class="identifier">std</span><span class="special">::</span><span class="identifier">free</span><span class="special">(</span><span class="identifier">block</span><span class="special">);</span> <span class="special">}</span>
<span class="special">};</span>

<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">UserAllocator</span> <span class="special">=</span> <span class="identifier">default_user_allocator_new_delete</s