576-bb"></a><span class="identifier">swap</span><span class="special">(</span><a class="link" href="permissions.html" title="Class permissions">permissions</a> <span class="special">&amp;</span> a<span class="special">,</span> <a class="link" href="permissions.html" title="Class permissions">permissions</a> <span class="special">&amp;</span> b<span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>Swaps the two <code class="computeroutput">permissions</code> o