="special">&lt;</span><span class="keyword">class</span> <span class="identifier">Ptr</span><span class="special">&gt;</span> <span class="keyword">class</span> <span class="identifier">pointer_wrapper</span>
    <span class="special">{</span>
     <span class="keyword">public</span><span class="special">:</span>
        <span class="keyword">typedef</span> <span class="identifier">Ptr</span> <span class="identifier">type</span><span class="special">;</span>

        <span class="keyword">explicit</span> <s