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

Subject: Re: [Boost-users] Compilation error using boost::filtered_graph when trying to access graph properties via boost::graph_bundle
From: Jeremiah Willcock (jewillco_at_[hidden])
Date: 2011-02-28 17:43:09

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