mic_buffer</span><span class="special">(</span><span class="identifier">s</span><span class="special">),</span> <span class="char">'\n'</span><span class="special">,</span>
    <span class="special">[&amp;</span><span class="identifier">s</span><span class="special">,</span> <span class="special">&amp;</span><span class="identifier">stream</span><span class="special">](</span><span class="identifier">error_code</span> <span class="identifier">ec</span><span class="special">,</span> <span class="identifier">