bsp;bool<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;dirname_dir&nbsp;:&nbsp;<span class="constructor">Dir</span>.t&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;<span class="constructor">Dir</span>.t<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;basename_dir&nbsp;:&nbsp;<span class="constructor">Dir</span>.t&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;<span class="constructor">Base</span>.t<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;to_list_dir&nbsp;:&nbsp;<span class="