Hi,
I am working on the Boost Graph Library, currently trying to create an
interface of the biconnected_components method to a Python code. I used the
example code available here
https://www.boost.org/doc/libs/1_67_0/libs/graph/example/biconnected_compone...
for the method and modified it for my purpose. The template of the method
is here
https://www.boost.org/doc/libs/1_67_0/libs/graph/doc/biconnected_components.....
The final code seems fine but I get an error while compiling it. And the
errors are related to adjacency.hpp which I have not changed so I'm
confused as to what the exact problem is. Hoping someone can help me out.
My code:
class BoostGraph
{
private:
typedef typename boost::adjacency_list<
OutEdgeListS, VertexListS, DirectedS,
boost::property,
EdgeProperty, boost::no_property, EdgeListS> adjacency_list;
typedef typename boost::property_map::type components;
public:
adjacency_list graph;
std::vector bc_tree() {
components components_bc = get(boost::edge_index, graph);
std::size_t num_comps = biconnected_components(graph,
components_bc);
std::cerr << "Found " << num_comps << " biconnected components.\n";
std::vector art_points;
articulation_points(graph, std::back_inserter(art_points));
std::cerr << "Found " << art_points.size() << " articulation
points.\n";
std::vector to_return;
return to_return;
}
The error I'm getting:
build/cythonized/sage/graphs/base/boost_graph.cpp:3730:26: required from
here
/home/meghana/Documents/sage_gsoc/sage_may/sage/local/include/boost/graph/detail/adjacency_list.hpp:2696:29:
error: forming reference to void
typedef value_type& reference;
^
/home/meghana/Documents/sage_gsoc/sage_may/sage/local/include/boost/graph/detail/adjacency_list.hpp:2697:35:
error: forming reference to void
typedef const value_type& const_reference;
^
/home/meghana/Documents/sage_gsoc/sage_may/sage/local/include/boost/graph/detail/adjacency_list.hpp:2701:61:
error: forming reference to void
typename Graph::vertex_descriptor,Property,Tag> type;
^
/home/meghana/Documents/sage_gsoc/sage_may/sage/local/include/boost/graph/detail/adjacency_list.hpp:2704:68:
error: forming reference to void
typename Graph::vertex_descriptor,const Property, Tag>
const_type;
^
error: command 'gcc' failed with exit status 1
Makefile:33: recipe for target 'sage' failed
make: *** [sage] Error 1
Thank you,
Meghana
