lass="special">(</span><span class="identifier">input_reference</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="identifier">output_reference</span> <a class="link" href="../boost/forward.html" title="Function template forward"><span class="identifier">forward</span></a><span class="special">(</span><span class="identifier">input_refe