rolCommand</code> requirements
        if it satisfies the requirements listed below.
      </p>
<p>
        In the table below, <code class="computeroutput">a</code> denotes a (possibly const) value of type
        <code class="computeroutput">X</code>, and <code class="computeroutput">b</code> denotes a value of type <code class="computeroutput">X</code>.
      </p>
<div class="table">
<a name="boost_asio.reference.IoControlCommand.t0"></a><p class="title"><b>Table&#160;19.&#160;IoControlCommand requireme