pecial">::</span><span class="identifier">yield_context</span> <span class="identifier">yield</span><span class="special">)</span>
    <span class="special">{</span>
        <span class="comment">// We use the Beast ssl_stream wrapped around a beast tcp_stream.</span>
        <span class="identifier">ssl_stream</span><span class="special">&lt;</span><span class="identifier">tcp_stream</span><span class="special">&gt;</span> <span class="identifier">stream</span><span class="special">(</span><span class="ide