ype must have a <a
  href="http://www.sgi.com/tech/stl/StrictWeakOrdering.html">
  StrictWeakOrdering</a> provided by the <tt>compare</tt> function
  object.<br>
  <b>Default:</b> <a
  href="../../property_map/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(g)</tt> and using the <tt>i_map</tt> for the index
  map.
</blockquote>

IN: <tt>distance_compare(CompareFunction cmp)</tt> 
<blockq