r</tt></a>. Also, this event
visitor can be combined with other event visitors using
<tt>std::pair</tt> to form an EventVisitorList.

<h3>Example</h3>

The following example shows the usage of the <tt>time_stamper</tt>.


<pre>
  std::vector<default_color_type> color(num_vertices(G));
  std::vector<size_type> dtime(num_vertices(G));
  std::vector<size_type> ftime(num_vertices(G));

  int time = 0;
  boost::breadth_first_search
    (G, vertex(s, G), make_bfs_visitor(
     std::make_pair(stamp_times(dtime.beg