pan> <span class="keyword">const</span><span class="special">;</span></pre>
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<td><p><span class="term">Effects:</span></p></td>
<td><p>Invokes the combiner with a
            <code class="computeroutput">slot_call_iterator</code> range
            [first, last) corresponding to the sequence of calls to the
            slots connected to signal
            <code c