html">
  StrictWeakOrdering</a> provided by the <tt>distance_compare</tt> function
  object.<br>
  <b>Default:</b> <a
  href="../../property_map/doc/iterator_property_map.html">
  <tt>iterator_property_map</tt></a> created from a
  <tt>std::vector</tt> of the <tt>WeightMap</tt>'s value type of size
  <tt>num_vertices(graph)</tt> and using the <tt>index_map</tt> for the index
  map.<br>
</blockquote>

IN: <tt>distance_compare(CompareFunction distance_compare)</tt> 
<blockquote>
  This function is use to comp