Re: [Boost-users] BGL and graphviz: extra property for links

14 Apr 2006

      I resolved the problem.  I should have declared the graphs as:

typedef boost::adjacency_list,
	property >,
	no_property > Graph;

Sorry for the confusion.

Best,
Irek

Irek Szczesniak wrote:
...
I want to use the read_graphiz function to load graphviz files.  Graph
links have an extra property called "lambdas," which tells about the
number of wavelengths a link has.  This link attribute is a positive
integer.
Below I'm sending you the program which I thought should work, but it
doesn't.  Plus, there is a sample graphviz file.  I have hard time
trying to decipher the errors, and made little progress, and so I
would appreciate any advice.  I'm attaching the compilation errors.
Thanks for reading.
Thanks & best,
Irek
*********************************************************************
#include <fstream>
#include <string>
#include 
#include 
#include 
#include 
using namespace boost;
enum edge_lambdas_t { edge_lambdas };
namespace boost
{
  BOOST_INSTALL_PROPERTY(edge, lambdas);
}
typedef boost::adjacency_list,
                  property,
                  property > Graph;
int
main()
{
  Graph g;
  dynamic_properties dp;
dp.property("lambdas", get(edge_lambdas, g));
  dp.property("node_id", get(vertex_name, g));
  dp.property("distance", get(edge_weight, g));
read_graphviz(std::cin, g, dp);
}
***********************************************************************
graph {
  a;
  b;
  c;
  c -- a [distance="100", lambdas="4"];
  a -- b [distance="200", lambdas="4"];
}
***********************************************************************
g++ -I /usr/local/include/boost-1_33_1/ -l bgl-viz  load.cc -o load
/usr/local/include/boost-1_33_1/boost/dynamic_property_map.hpp: In 
member function `std::string 
boost::detail::dynamic_property_map_adaptor<PropertyMap>::get_string(const 
(...)