    will be invoked with the <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">asio</span><span class="special">::</span><span class="identifier">error</span><span class="special">::</span><span class="identifier">operation_aborted</span></code>
            error code.
          </p>
<p>
            Cancelling the timer does not change the expiry time.
          </p>
<h6>
<a name="boost_asio.reference.basic_waitable_timer.cancel.overloa