const</span> <span class="keyword">auto</span> s : n-&gt;_successors) {</div><div class="line"><a name="l00341"></a><span class="lineno">  341</span>&#160;        os &lt;&lt; <span class="charliteral">&#39;p&#39;</span> &lt;&lt; n &lt;&lt; <span class="stringliteral">&quot;-&gt;&quot;</span> &lt;&lt; <span class="charliteral">&#39;p&#39;</span> &lt;&lt; s &lt;&lt; <span class="stringliteral">&quot;;\n&quot;</span>;</div><div class="line"><a name="l00342"></a><span class="lineno">  342</span>&#160;      }</d