  record ordering tools</a> to implement ordering predicates.
        </p>
<p>
</p>
<pre class="programlisting"><span class="comment">// Complete sink type</span>
<span class="keyword">typedef</span> <span class="identifier">sinks</span><span class="special">::</span><span class="identifier">asynchronous_sink</span><span class="special">&lt;</span>
    <span class="identifier">sinks</span><span class="special">::</span><span class="identifier">text_ostream_backend</span><span class="special">,</span>
    <s