span><span class="special">::</span><span class="identifier">move</span><span class="special">(</span><span class="identifier">msg</span><span class="special">)};</span>

    <span class="keyword">do</span>
    <span class="special">{</span>
        <span class="comment">// Extract whatever characters are presently available in the istream</span>
        <span class="keyword">if</span><span class="special">(</span><span class="identifier">is</span><span class="special">.</span><span class="identifier">rdbuf