="anchor" id="autotoc_md23"></a>
v0.4.2</h2>
<ul>
<li>Added: <code>trait::is_type[_v]</code>, <code>descriptor::is_type(const T&amp;)</code> for checking whether a type is a type_descriptor&lt;T&gt; instance.</li>
</ul>
<h2><a class="anchor" id="autotoc_md24"></a>
v0.4.1</h2>
<ul>
<li><code>trait::as_type_list</code> now supports reference type in place of <code>T&lt;Ts...&gt;</code> (e.g. <code>std::tuple&lt;Ts...&gt;&amp;</code> -&gt; <code>type_list&lt;Ts...&gt;</code>).</li>
<li><code>refl::attr::access