 class="identifier">pair</span></code>.
        </li>
<li class="listitem">
          Added fallback for <a class="link" href="reference/is_nothrow_swappable.html" title="is_nothrow_swappable">is_nothrow_swappable</a>
          on pre-C++11 compilers.
        </li>
</ul></div>
<h5>
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      <span class="phrase"><a name="boost_typetraits.history.boost_1_64_0"></a></span><a class="link" href="history.html#boost_typetraits.history.boost_1_64_0">Boost
      1.64.0</a>
   