an> <span><a href="#type-t">t</a> <span class="arrow">&#45;&gt;</span></span> bool</span></code></div><div class="spec-doc"><p>returns whether the source file has provided extension</p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-is_matching"><a href="#val-is_matching" class="anchor"></a><code><span><span class="keyword">val</span> is_matching : <span><span><span class="xref-unresolved">Str</span>.regexp list</span> <span class="arrow">&#45;&gt;</span></span> <span><a href="#t