ode class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">pair</span></code>, omitting
      the comparison operators, default constructor, and template copy constructor
      for simplicity:
    </p>
<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">T1</span><span class="special">,</span> <span class="keyword">typename</span> <span class