ass="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">python</span><span class="special">/</span><span class="identifier">ptr</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>

<span class="keyword">class</span> <span class="identifier">expensive_to_copy</span>
<span class="special">{</span>
   <span class="special">...</span>
<span class="special">};</span>

<span class="keyword">void</span