s="code"><span class="constructor">Scanf</span>.<span class="constructor">Scanning</span>.in_channel</code>.</li>
</ul>

      Type argument <code class="code"><span class="keywordsign">'</span>b</code> is also the type of the first argument given to
      user's defined printing functions for <code class="code">%a</code> and <code class="code">%t</code> conversions,
      and user's defined reading functions for <code class="code">%r</code> conversion.
<p>
</p><ul>
<li><code class="code"><span class="keywo