cial">.</span><span class="identifier">alias</span><span class="special">()</span></code>
                    </p>
                  </td>
<td>
                    <p>
                      Return an alias of <code class="computeroutput"><span class="identifier">r</span></code>.
                      The alias is a generator that holds a reference to <code class="computeroutput"><span class="identifier">r</span></code>. Reference semantics.
                    </p>
                  </td>
</tr>
<tr>
<td>
  