any within the given scope. From all available days, the weekends
</span>    <span class="comment">// and holidays have to be subtracted: 
</span>    <span class="identifier">interval_set</span><span class="special">&lt;</span><span class="identifier">date</span><span class="special">&gt;</span> <span class="identifier">worktime</span><span class="special">(</span><span class="identifier">scope</span><span class="special">);</span>
    <span class="comment">// Subtract the weekends
</span>    <span class="i