c++ - boost::prim_minimum_spanning_tree 中意外的负边权重错误

Question

以下代码在 prim_minimum_spanning_tree 调用上抛出“负边权重”，即使我仅使用正数也是如此。应该改变什么才能让它发挥作用？

typedef boost::property<vertex_distance_t, int> VertexProperty;
typedef boost::property<edge_weight_t, int> EdgeProperty;
typedef adjacency_list<vecS, vecS, undirectedS, VertexProperty, EdgeProperty> Graph;

typedef pair<int, int> Edge;

Edge edges[] =      {Edge(0, 1), Edge(1, 2)};
int weights[] =     {2, 1}; // this works: int weights[] =   {1, 2}; 

Graph g(edges, edges + sizeof(edges)/sizeof(Edge), weights, 3);
std::vector<Graph::vertex_descriptor> predecessors(num_vertices(g));
boost::prim_minimum_spanning_tree(g, &predecessors[0]);

注意:我可以通过调整权重值使其成功。

编译器:MS Visual Studio 2010 C++升压版本:1.54

Answer 1

这是一个 Boost bug ，并且已经修复:如果其他人从 1.54 看到此行为，只需 update to 1.55 or newer .