lass="special">);</span>
<span class="special">};</span>
</pre>
<p>
      The two members of the pair can be accessed using the member functions <code class="computeroutput"><span class="identifier">first</span><span class="special">()</span></code> and
      <code class="computeroutput"><span class="identifier">second</span><span class="special">()</span></code>.
      Note that not all member functions can be instantiated for all template parameter
      types. In particular <code class="computeroutput"><