er">system</span><span class="special">::</span><span class="identifier">default_queue</span><span class="special">(</span><span class="special">)</span><span class="special">)</span><span class="special">;</span></pre></div>
<div class="refsect1">
<a name="idp80378976"></a><h2>Description</h2>
<p>Removes all consecutive duplicate elements (determined by <code class="computeroutput">op</code>) from the range [first, last). If <code class="computeroutput">op</code> is not provided, the equality operator is u