The formatting went bad with the previous email. Sorry about that.
Here it is once again.
Hello,
I'm using a labeled graph
typedef boost::labeled_graph,std::string>
MyGraph;
which lets me access vertices with string ids.
I add a vertex and set it's relevant fields this way:
MyVertex u = boost::add_vertex(id, g);
g[id].category = category; //crashes here
g[id].vertex_id = id;
Here id is an std::string. And remove them like so:
// First we remove all edges from this vertex
BGL_FORALL_VERTICES(v, g, MyGraph){
if (QString(g.graph()[v].vertex_id.c_str()).compare(roomIdToBeRemoved)
== 0){
ve = v;
BGL_FORALL_OUTEDGES(v, e, g, MyGraph) {
ev.push_back(e);
}
}
}
foreach(MyEdge e, ev){
remove_edge(e,g);
}
// Then we remove the vertex itself
remove_vertex(roomIdToBeRemoved.toStdString().c_str(),g);
This so far seems to work. The trouble is, if I want to add a removed
vertex once again with the same id, I get the following:
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
while setting the fields of the newly added vertex (above commented
"crashes here").
What might be the reason? I'm using boost functions for removing/adding things.
