[Boost-users] bundled graph property access?

26 Jul 2008

      Hi all,

I've found very few references to the use of bundled properties for graph properties, as opposed to edge and vertex properties.  Are these supported?  I find that I can supply a bundled property type name for the adjacency_list constructor, but cannot use "get_property" to access individual field values.  This type of syntax works:

adjlist.m_property.fieldname = whatever;

but this does not:

get_property(adjlist, &graphproptype::fieldname) = whatever;

although it seems like the second form would be proper (for data hiding, and also the documentation suggests this is right - at least for old-style internal properties).

To be specific, the following code does not compile:

// test case for bundled graph properties
#include <boost/graph/adjacency_list.hpp>
#include <iostream>
using namespace std;
using namespace boost;

/// circuit graph vertex properties
struct  VertexProps {
};

/// circuit graph edge props
struct EdgeProps {
};

/// graph properties
struct GraphProps {
  int blah;
};

typedef adjacency_list<vecS,         // storage for vertices
                       vecS,         // storage for edges
                       directedS,    // edges are directed
                       VertexProps,
                        EdgeProps,
                       GraphProps> TestGraph;
int main(int argc, char **argv) {
  TestGraph mygraph;

  set_property(mygraph, &GraphProps::blah, 1);

}

/usr/include/boost/graph/adjacency_list.hpp: In function void boost::set_property(boost::adjacency_list<OutEdgeListS, VertexListS, DirectedS, VertexProperty, EdgeProperty, GraphProperty, EdgeListS>&, Tag, const Value&) [with OEL = boost::vecS, VL = boost::vecS, DirS = boost::directedS, VP = VertexProps, EP = EdgeProps, GP = GraphProps, EL = boost::listS, Tag = int GraphProps::*, Value = int]:
test_graphprops.cpp:29:   instantiated from here
/usr/include/boost/graph/adjacency_list.hpp:433: error: no matching function for call to get_property_value(GraphProps&, int GraphProps::*)

Any suggestions?

Thanks  and Regards,
Jeff Trull

[Boost-users] bundled graph property access?

Jeffrey Trull