> <span class="identifier">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="idp99346080"></a><h2>Description</h2>
<p>Performs a key-value stable sort using the keys in the range [<code class="computeroutput">keys_first</code>, <code class="computeroutput">keys_last</code>) on the values in the range [<code