Styjun

I take the the following code from this post and changed the VertexList and the EdgeList to listS instead of vecS.

I found out that because of the missing index make_label_writer(get(&VertexProps::name, g)) doesn't work. Could someone tell me how I should change the code to get it work. I would prefer a solution with a custom property writer.

Thank you very much.

#include <boost/graph/adjacency_list.hpp>
#include <boost/graph/graphviz.hpp>

struct VertexProps std::string name; ;
struct EdgeProps std::string name; ;
typedef boost::adjacency_list<boost::listS, boost::listS, boost::directedS, VertexProps, EdgeProps> Graph;

int main() 
 Graph g(3);
 g[0].name = "one";
 g[1].name = "two";
 g[2].name = "three";
 add_edge(1, 0, "e1", g);
 add_edge(2, 1, "e2", g);
 add_edge(1, 2, "e3", g);
 add_edge(2, 0, "e4", g);

write_graphviz(std::cout, g,
 make_label_writer(get(&VertexProps::name, g)),
 make_label_writer(get(&EdgeProps::name, g)));

For the sake of completeness, here is a modification of the solution by sehe with a custom property writer. Please don't forget to upvote the original answer.

Wandbox

#include <boost/graph/adjacency_list.hpp>
#include <boost/graph/adjacency_list.hpp>
#include <boost/graph/graphviz.hpp>

struct VertexProps std::string name; ;
struct EdgeProps std::string name; ;
typedef boost::adjacency_list<boost::listS, boost::listS, boost::directedS, VertexProps, EdgeProps> Graph;

template <class Name>
class my_label_writer 
public:
 my_label_writer(Name _name) : name(_name) 
 template <class VertexOrEdge>
 void operator()(std::ostream& out, const VertexOrEdge& v) const 
 out << "[label="" << name[v].name << ""]";
 
private:
 Name name;
;


int main() 
 Graph g;
 Graph::vertex_descriptor v0 = add_vertex("one", g);
 Graph::vertex_descriptor v1 = add_vertex("two", g);
 Graph::vertex_descriptor v2 = add_vertex("three", g);
 add_edge(v1, v0, "e1", g);
 add_edge(v2, v1, "e2", g);
 add_edge(v1, v2, "e3", g);
 add_edge(v2, v0, "e4", g);

 std::map<Graph::vertex_descriptor, int> vertex_index;
 for (auto vd : boost::make_iterator_range(vertices(g)))
 vertex_index[vd] = vertex_index.size();

 my_label_writer<Graph> w(g);

 write_graphviz(std::cout, g,
 w,
 make_label_writer(get(&EdgeProps::name, g)),
 boost::default_writer, // graph_property_writer
 boost::make_assoc_property_map(vertex_index));

With listS the vertex descriptor type is not integral, and therefore not suitable as a vertex index.

You need to use the actual descriptors now:

Graph g;
Graph::vertex_descriptor v0 = add_vertex("one", g);
Graph::vertex_descriptor v1 = add_vertex("two", g);
Graph::vertex_descriptor v2 = add_vertex("three", g);
add_edge(v1, v0, "e1", g);
add_edge(v2, v1, "e2", g);
add_edge(v1, v2, "e3", g);
add_edge(v2, v0, "e4", g);

Also, when writing, you'll have to supply a vertex_index property map. This incidentally requires you to pass a graph_property_writer pro forma:

std::map<Graph::vertex_descriptor, int> vertex_index;
for (auto vd : boost::make_iterator_range(vertices(g)))
 vertex_index[vd] = vertex_index.size();

write_graphviz(std::cout, g,
 make_label_writer(get(&VertexProps::name, g)),
 make_label_writer(get(&EdgeProps::name, g)),
 boost::default_writer, // graph_property_writer
 boost::make_assoc_property_map(vertex_index));

DEMO

Live On Wandbox

#include <boost/graph/adjacency_list.hpp>
#include <boost/graph/adjacency_list.hpp>
#include <boost/graph/graphviz.hpp>

struct VertexProps std::string name; ;
struct EdgeProps std::string name; ;
typedef boost::adjacency_list<boost::listS, boost::listS, boost::directedS, VertexProps, EdgeProps> Graph;

int main() 
 Graph g;
 Graph::vertex_descriptor v0 = add_vertex("one", g);
 Graph::vertex_descriptor v1 = add_vertex("two", g);
 Graph::vertex_descriptor v2 = add_vertex("three", g);
 add_edge(v1, v0, "e1", g);
 add_edge(v2, v1, "e2", g);
 add_edge(v1, v2, "e3", g);
 add_edge(v2, v0, "e4", g);

 std::map<Graph::vertex_descriptor, int> vertex_index;
 for (auto vd : boost::make_iterator_range(vertices(g)))
 vertex_index[vd] = vertex_index.size();

 write_graphviz(std::cout, g,
 make_label_writer(get(&VertexProps::name, g)),
 make_label_writer(get(&EdgeProps::name, g)),
 boost::default_writer, // graph_property_writer
 boost::make_assoc_property_map(vertex_index));

Prints

digraph G 
0[label=one];
1[label=two];
2[label=three];
1->0 [label=e1];
1->2 [label=e3];
2->1 [label=e2];
2->0 [label=e4];