rong>Throws</strong></span>: Nothing. </p>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">bool</span> <a name="idp60988704-bb"></a><span class="identifier">is_linked</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
<p><span class="bold"><strong>Precondition</strong></span>: <code class="computeroutput"><a class="link" href="link_mode.html" title="Struct template link_mode">link_mode</a></co