On Apr 14, 2005, at 11:22 PM, Vivid Yang wrote:
I tried to compile dijkstra-example-listS (BGL CVS) in MSVC 6.0. There were several errors. In the code
tie(e, inserted) = add_edge(edge_array[j].first, edge_array[j].second, g);
The variable int edge_array[j].first and edge_array[j].second cannot be converted to descriptors.
To solve this, I have to map int (A, B, C, D, E) to descriptor first: std::pair<int, vertex_descriptor> maps[5]; int c = 0; graph_traits<graph_t>::vertex_iterator i, iend; for (tie(i, iend) = vertices(g); i != iend; ++i, ++c) { maps[c] = std::pair<int, vertex_descriptor>(c, *i); }
Yep, the MSVC 6 workaround was broken. I've fixed it in Boost CVS for the next release, but see below for the code if you want to try it yourself.
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The same problem happens in dijkstra_shortest_paths.hpp In the lines :
typename graph_traits<VertexListGraph>::vertex_iterator ui, ui_end; put(distance, *ui, inf); put(predecessor, *ui, *ui); put(distance, s, zero);
They cannot convert descriptor s and (*ui) from (void *) to int Here is the error description: boost\boost_1_32_0\boost\graph\dijkstra_shortest_paths.hpp(211) : error C2664: 'void __cdecl boost::put(int *,int,const double &)' : cannot convert parameter 2 from 'void *' to 'int' This conversion requires a reinterpret_cast, a C-style cast or function-style cast
If you find where the #if defined(BOOST_MSVC)... line is, replace the conditional block with: #if defined(BOOST_MSVC) && BOOST_MSVC <= 1300 graph_t g(num_nodes); property_map<graph_t, edge_weight_t>::type weightmap = get(edge_weight, g); std::vector<vertex_descriptor> msvc_vertices; for (tie(i, iend) = vertices(g); i != iend; ++i) msvc_vertices.push_back(*i); for (std::size_t j = 0; j < num_arcs; ++j) { edge_descriptor e; bool inserted; tie(e, inserted) = add_edge(msvc_vertices[edge_array[j].first], msvc_vertices[edge_array[j].second], g); weightmap[e] = weights[j]; } #else I think it'll be work, but it's hard to tell with MSVC 6, which we've unfortunately had to stop supporting because it is too unstable :(. Doug