    <span class="identifier">error</span>
<span class="special">};</span>

<span class="comment">// Complete sink type</span>
<span class="keyword">typedef</span> <span class="identifier">sinks</span><span class="special">::</span><span class="identifier">synchronous_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">&gt;</span> <span class="identifier">sink_t</span><span 