uteroutput"><span class="identifier">Clock</span></code>,
        where <code class="computeroutput"><span class="identifier">Clock</span></code> meets the C++11
        type requirements for a clock, and <code class="computeroutput"><span class="identifier">d</span></code>
        denotes a value of type <code class="computeroutput"><span class="identifier">Clock</span><span class="special">::</span><span class="identifier">duration</span></code>.
      </p>
<div class="table">
<a name="boost_asio.referenc