> and <code class="computeroutput"><span class="identifier">c</span></code>
        will outlive that of <code class="computeroutput"><span class="identifier">my_expression</span></code>.
      </p>
<p>
        In fact it is particularly easy to create dangling references by mixing expression
        templates with the auto keyword, for example:
      </p>
<p>
        <code class="computeroutput"><span class="keyword">auto</span> <span class="identifier">val</span>
        <span class="special">=</span> <sp