class="arrow">&#45;&gt;</span></span> <span>string <span class="arrow">&#45;&gt;</span></span> <span>string <span class="arrow">&#45;&gt;</span></span> string</span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-temp_dir"><a href="#val-temp_dir" class="anchor"></a><code><span><span class="keyword">val</span> temp_dir : <span><span class="optlabel">?perm</span>:int <span class="arrow">&#45;&gt;</span></span> <span><span class="optlabel">?in_dir</span>:string <span class="a