tml#type-elt">elt</a> = <a href="#type-t">t</a></span></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-is_invalid"><a href="#val-is_invalid" class="anchor"></a><code><span><span class="keyword">val</span> is_invalid : <span><a href="#type-t">t</a> <span class="arrow">&#45;&gt;</span></span> bool</span></code></div><div class="spec-doc"><p>Is the source file the invalid source file?</p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-read_co