="special">(),</span> <span class="identifier">c</span><span class="special">.</span><span class="identifier">end</span><span class="special">())</span></code>. The optional <a class="link" href="../concepts.html#concepts.callpolicies" title="CallPolicies">CallPolicies</a>
          <code class="computeroutput"><span class="identifier">P</span></code> can be used to control
          how elements are returned during iteration.
        </p>
<p>
          In the table below, c is an instance of Container.
   