al"><span class="pre">std::ostream&amp;</span> <span class="pre">out</span></tt></dt>
<dd>A standard <tt class="docutils literal"><span class="pre">std::ostream</span></tt> object.</dd>
<dt>IN: <tt class="docutils literal"><span class="pre">VertexListGraph&amp;</span> <span class="pre">g</span></tt></dt>
<dd>A directed or undirected graph.  The
graph's type must be a model of <a class="reference external" href="VertexListGraph.html">VertexListGraph</a>. If the graph
doesn't have an internal <tt class="docut