p;<span class="keyword">val</span>&nbsp;null&nbsp;:&nbsp;string<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;temp_file&nbsp;:&nbsp;?temp_dir:string&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;string&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;string&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;string<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;open_temp_file&nbsp;:<br>
&nbsp;&nbsp;&nbsp;&nbsp;?mode:<span class="constructor">Stdlib</span>.open_flag&nbsp;list&nbsp;<span class=