使用bgl使用dfs構建搜索樹

Question

我想使用dfs算法創建圖形的搜索樹。 我在代碼中反復出現編譯錯誤（編譯錯誤很長，以至於我沒有粘貼它）：

typedef adjacency_list <vecS, vecS, undirectedS> Graph;   
typedef graph_traits <Graph>::edge_descriptor Edge;
typedef graph_traits <Graph>::vertex_descriptor Vertex;

typedef pair<int, int> E;
vector<E> edges;

Graph g(edges.begin(), edges.end(), n);

vector<Vertex> p(n);
Vertex s = vertex(0,g);

breadth_first_search(g, s, visitor(record_predecessors(&p[0], on_tree_edge())));

部分錯誤：

instantiated from here
/usr/include/boost/graph/breadth_first_search.hpp:39:7: error: ‘struct boost::predecessor_recorder<long unsigned int*, boost::on_tree_edge>’ has no member named ‘initialize_vertex’
/usr/include/boost/graph/breadth_first_search.hpp:40:7: error: ‘struct boost::predecessor_recorder<long unsigned int*, boost::on_tree_edge>’ has no member named ‘discover_vertex’
/usr/include/boost/graph/breadth_first_search.hpp:41:7: error: ‘struct boost::predecessor_recorder<long unsigned int*, boost::on_tree_edge>’ has no member named ‘examine_vertex’
/usr/include/boost/graph/breadth_first_search.hpp:42:7: error: ‘struct boost::predecessor_recorder<long unsigned int*, boost::on_tree_edge>’ has no member named ‘examine_edge’
/usr/include/boost/graph/breadth_first_search.hpp:43:7: error: ‘struct boost::predecessor_recorder<long unsigned int*, boost::on_tree_edge>’ has no member named ‘tree_edge’
/usr/include/boost/graph/breadth_first_search.hpp:44:7: error: ‘struct boost::predecessor_recorder<long unsigned int*, boost::on_tree_edge>’ has no member named ‘non_tree_edge’
/usr/include/boost/graph/breadth_first_search.hpp:45:7: error: ‘struct boost::predecessor_recorder<long unsigned int*, boost::on_tree_edge>’ has no member named ‘gray_target’
/usr/include/boost/graph/breadth_first_search.hpp:46:7: error: ‘struct boost::predecessor_recorder<long unsigned int*, boost::on_tree_edge>’ has no member named ‘black_target’
/usr/include/boost/graph/breadth_first_search.hpp:47:7: error: ‘struct boost::predecessor_recorder<long unsigned int*, boost::on_tree_edge>’ has no member named ‘finish_vertex’
make: *** [file] Error 1

Answer 1

breadth_first_search需要一個BFSVisitor 。 record_predecessors返回一個EventVisitor 。 您需要使用make_bfs_visitor才能使其正常工作。

breadth_first_search(g, s, visitor(make_bfs_visitor(record_predecessors(&p[0], on_tree_edge()))));