span class="identifier">sink</span><span class="special">();</span>

    <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span><span class="special">&lt;&lt;</span><span class="string">"sink is complete: "</span><span class="special">&lt;&lt;</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">boolalpha</span><span class="special">&lt;&lt;!</span><span class="identifier">sink</span><span class="special">&lt;&lt;</sp