/span>
  <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> Signature<span class="special">,</span> <span class="keyword">typename</span> Functor<span class="special">&gt;</span> 
    <span class="keyword">bool</span> <a class="link" href="../boost/function.html#id-1_3_17_6_2_1_4_32_2_2-bb"><span class="keyword">operator</span><span class="special">!=</span></a><span class="special">(</span><span class="identifier">Functor</span><span class="special">