[BGL] filtered_graph and bundled properties (was Re: [BGL] filtered_graph and null_vertex())

15 Aug 2005

      On Mon, 2005-08-15 at 10:14 +0400, Vladimir Prus wrote:
...
Yes, null_vertex should be defined. I've just committed the attached patch
to CVS, and your test program now compiles. You can either grab the current
CVS version (CVS trunk), or apply the patch to 1.33 sources.
Thanks a lot!

I have one more problem with filtered_graph, but this time it has to do
with bundled properties. If I try to compile the following program:

--------------------------------------------------------------
#include <boost/graph/adjacency_list.hpp>
#include <boost/graph/filtered_graph.hpp>

using namespace boost;

struct VertexProperties
{
  int answer;
};

int main()
{
  typedef adjacency_list<vecS,vecS,bidirectionalS,VertexProperties> graph_t;
  typedef filtered_graph<graph_t,keep_all> f_graph_t;
  graph_t g;
  f_graph_t fg(g, keep_all());
  graph_traits<f_graph_t>::vertex_descriptor v = add_vertex(g);
  fg[v].answer = 42;
  return 0;
}
--------------------------------------------------------------
I get the following error with boost 1.33 and GCC 4.0.1:

/usr/include/boost/graph/filtered_graph.hpp: In member function
‘typename boost::graph::detail::bundled_result<Graph, Descriptor>::type&
boost::filtered_graph<Graph, EdgePredicate,
VertexPredicate>::operator[](Descriptor) [with Descriptor = unsigned
int, Graph = main()::graph_t, EdgePredicate = boost::keep_all,
VertexPredicate = boost::keep_all]’:
test2.cc:19:   instantiated from here
/usr/include/boost/graph/filtered_graph.hpp:204: error:
‘local_to_global’ was not declared in this scope

This was supposed to work right? The error is pretty clear, but I don't
know what "local_to_global" is supposed to do, and where it should be.

I made the attached modifications to a local version of
filtered_graph.hpp, and the code above compiles, but I don't think that
they are right at all, since I changed the constness of the internal
reference to the original graph.

-- 
Tiago de Paula Peixoto <tiago@forked.de>