/span> <span class="identifier">second</span><span class="special">;</span>

<span class="identifier">pair</span><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><a class="link" href="reference/add_reference.html" title="add_reference">add_reference</a><span class="special">&lt;</span><span class="keyword">const</span> <span class="identifier">T1</span><span class="special">&gt;::</span><span class="identifier">type</span> <span class="identifier">nfirst</spa