zsyn-operator">,</span> <span class="mdzsyn-identifier">JanetType</span> <span class="mdzsyn-identifier">type</span><span class="mdzsyn-operator">)</span><span class="mdzsyn-operator">;</span></code></pre><p>Checks the type x, and returns a non zero value if x is the correct type, and
0 otherwise. Usually, you will want to use this function before unwrapping a value.
</p>
<hr><pre class="mendoza-codeblock"><code data-language="c"><span class="mdzsyn-comment">/* macro */</span>
<span class="mdzsyn-type">int<