<a href="index.html#type-must_be_valid_reason">must_be_valid_reason</a> <span>&#45;&gt;</span> <a href="index.html#type-must_be_valid_reason">must_be_valid_reason</a> <span>&#45;&gt;</span> int</code></dt><dt class="spec value" id="val-equal_must_be_valid_reason"><a href="#val-equal_must_be_valid_reason" class="anchor"></a><code><span class="keyword">val</span> equal_must_be_valid_reason : <a href="index.html#type-must_be_valid_reason">must_be_valid_reason</a> <span>&#45;&gt;</span> <a href="index.html#type