work with __boost_result_of__</span>
<span class="identifier">fusion</span><span class="special">::</span><a class="link" href="../generation/functions/mk_fused_fobj.html" title="make_fused_function_object"><code class="computeroutput"><span class="identifier">make_fused_function_object</span></code></a><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">less</span><span class="special">&lt;</span><span class="keyword">int</span><span clas