s="line"><a name="l00275"></a><span class="lineno">  275</span>&#160;        <span class="keywordtype">int</span> do_max_length() <span class="keyword">const</span> noexcept <span class="keyword">override</span></div><div class="line"><a name="l00276"></a><span class="lineno">  276</span>&#160;        {</div><div class="line"><a name="l00277"></a><span class="lineno">  277</span>&#160;            <span class="keywordflow">return</span> 4;</div><div class="line"><a name="l00278"></a><span class="lineno">  27