, g)</tt>
</blockquote>

IN: <tt>weight_map(WeightMap w)</tt>
<blockquote>
  The weight (also know as ``length'' or ``cost'') of each edge in the
  graph.  The <tt>WeightMap</tt> type must be a model of <a
  href="../../property_map/doc/ReadablePropertyMap.html">Readable Property
  Map</a>.  The key type for this property map must be the edge
  descriptor of the graph.  The value type for the weight map must be
  <i>Addable</i> with the distance map's value type. <br>
  <b>Default:</b> <tt>get(edge_weight, 