Re: [Boost-users] Compilation error using boost::filtered_graph when trying to access graph properties via boost::graph_bundle

28 Feb 2011


      On Mon, 28 Feb 2011, Tony Cook wrote:
...
Hi, The following test program highlights an compilation error issue when using a boost::filtered_graph to access
graph properties.  I am using Boost 1.46.0
#include <boost/graph/adjacency_list.hpp>
#include <boost/graph/filtered_graph.hpp>
class TestGraph
{
  class VertexProperties { public: bool mFlag ; } ;
  class EdgeProperties   { public: bool mFlag ; } ;
  class GraphProperties  { public: bool mFlag ; } ;
typedef boost::adjacency_list
     <boost::vecS, boost::listS, boost::undirectedS, EdgeProperties, VertexProperties, GraphProperties> GraphType ;
template <typename GraphType>
  class EdgePredicate
  {
     public: EdgePredicate () : mpGraph (0) {}
     public: EdgePredicate (GraphType& vrGraph) : mpGraph (&vrGraph) {}
     public: template <typename EdgeType>
             bool operator()(const EdgeType& vEdge) const { return (*mpGraph)[vEdge].mFlag ; }
     private: GraphType* mpGraph ;
  } ;
template <typename GraphType>
  class VertexPredicate
  {
     public: VertexPredicate () : mpGraph (0) {}
     public: VertexPredicate (GraphType& vrGraph) : mpGraph (&vrGraph) {}
     public: template <typename VertexType>
             bool operator()(const VertexType& vVertex) const { return (*mpGraph)[vVertex].mFlag ; }
     private: GraphType* mpGraph ;
  } ;
typedef boost::filtered_graph<GraphType, EdgePredicate<GraphType>, VertexPredicate<GraphType> > FilteredGraphType ;
...
void foo ()
  {
     GraphType graph ;
     FilteredGraphType filter (graph, EdgePredicate<GraphType> (graph), VertexPredicate<GraphType> (graph)) ;
graph  [boost::graph_bundle].mFlag = true ;
     filter [boost::graph_bundle].mFlag ;        // ***** Does not compile - see below
     ...
  }
}
Could you please see if this problem still appears in r69404 of the Boost 
trunk (just committed)?  If you are using a release, you only need to get 
boost/graph/properties.hpp and boost/graph/graph_traits.hpp from the trunk 
and overwrite your copies.  I believe I have fixed the bug -- your example 
from above compiles, at least.

-- Jeremiah Willcock