an class="keyword">typename</span> T2<span class="special">,</span> <span class="keyword">typename</span> D2<span class="special">&gt;</span> 
      <span class="keyword">bool</span> <a class="link" href="../boost/movelib/operato_1_3_25_20_14_3_1_5.html" title="Function template operator&lt;"><span class="keyword">operator</span><span class="special">&lt;</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/movelib/unique_ptr.html" title="Class template u