<em>&lt;bitmask of alert::category_t flags&gt;</em>;
virtual alert_category_t category() const { return static_category; }

virtual char const* what() const { return <em>&lt;string literal of the name of this alert&gt;</em>; }
</pre>
<p>The <tt class="docutils literal">alert_type</tt> is used for the type-checking in <tt class="docutils literal">alert_cast</tt>. It must
not collide with any other <a class="reference external" href="reference-Alerts.html#alert">alert</a>. The built-in alerts in libtorrent wi