="code">v</code> for each <code class="code"><span class="constructor">R</span>&nbsp;(r,&nbsp;v)</code> in <code class="code">l</code>
    while executing <code class="code">f</code>. The previous contents of the references is restored
    even if <code class="code">f</code> raises an exception.</p>
</div>
</div>

<pre><span id="MODULEStdlib"><span class="keyword">module</span> <a href="Misc.Stdlib.html">Stdlib</a></span>: <code class="code"><span class="keyword">sig</span></code> <a href="Misc.Stdlib.html"