 class="computeroutput"><span class="identifier">unlimited</span></code></a>, or a user-defined
                <a class="link" href="concepts/RatePolicy.html" title="RatePolicy &#9733;"><span class="emphasis"><em>RatePolicy</em></span></a>.
              </li>
<li class="listitem">
                Supports <a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p1322r0.html" target="_top">P1322R0</a>.
              </li>
</ul></div>
        </li>
<li class="listitem">
          <code class="comput