ecial">::</span><span class="identifier">buffer_size</span><span class="special">(</span><span class="identifier">cb1</span><span class="special">)</span> <span class="special">+</span>
    <span class="identifier">boost</span><span class="special">::</span><span class="identifier">asio</span><span class="special">::</span><span class="identifier">buffer_size</span><span class="special">(</span><span class="identifier">cb2</span><span class="special">)</span> <span class="special">+</span>
    <span class="