C++ 从boost::labeled_图获取节点标签

C++ 从boost::labeled_图获取节点标签,c++,boost,boost-graph,C++,Boost,Boost Graph,我想在BGL的标签图中检索标签节点的标签,但找不到执行此操作的方法 以下MWE展示了我所寻找的: //g++ -O3 question.cpp -o question.exe -I. --std=c++11 -lprotobuf-lite -lpthread -lz -losmpbf #include <iostream> #include <boost/graph/adjacency_list.hpp> #include <boost/graph/labeled

我想在BGL的标签图中检索标签节点的标签,但找不到执行此操作的方法

以下MWE展示了我所寻找的:

//g++ -O3 question.cpp -o question.exe -I. --std=c++11 -lprotobuf-lite -lpthread -lz -losmpbf
#include <iostream>

#include <boost/graph/adjacency_list.hpp>
#include <boost/graph/labeled_graph.hpp>
#include <boost/graph/iteration_macros.hpp>

typedef long long node_id_t;

typedef boost::adjacency_list<
  boost::listS,           // Store out-edges of each vertex in a std::list
  boost::listS,           // Store vertex set in a std::list
  boost::bidirectionalS,  // The file dependency graph is directed
  boost::no_property,     // vertex properties
  boost::no_property      // edge properties
> AdjGraph;

typedef boost::labeled_graph<
  AdjGraph,
  node_id_t          // Node ID
> LabeledGraph;

int main(){
  LabeledGraph g;

  add_vertex( 10, g );
  add_vertex( 20, g );
  add_vertex( 30, g );
  add_vertex( 40, g );
  add_vertex( 50, g );

  boost::add_edge_by_label(10,30,g);
  boost::add_edge_by_label(10,50,g);
  boost::add_edge_by_label(30,40,g);
  boost::add_edge_by_label(50,20,g);

  BGL_FORALL_EDGES(e, g, LabeledGraph){
    auto source_n = boost::source(e,g);
    //How do I do the following?
    //std::cerr<<boost::get_label_of_vertex(source_n)<<std::endl;
  }
}
//g++-O3 question.cpp-o question.exe-I.--std=c++11-lprotobuf lite-lpthread-lz-losmpbf
#包括
#包括
#包括
#包括
typedef long long node\u id\t;
typedef boost::邻接列表<
boost::list,//在std::list中存储每个顶点的边
boost::list,//将顶点集存储在std::list中
boost::bidirectionalS,//文件依赖关系图是定向的
boost::no_属性,//顶点属性
boost::no_属性//边缘属性
>调整图;
typedef boost::标记的_图<
AdjGraph,
节点\u id\u t//节点id
>标签图;
int main(){
标签图g;
添加_顶点(10,g);
添加_顶点(20,g);
添加_顶点(30,g);
添加_顶点(40,g);
添加_顶点(50,g);
boost::按标签(10,30,g)添加边;
boost::按标签添加边(10,50,g);
boost::按标签(30,40,g)添加边;
boost::按标签(50,20,g)添加边;
所有边缘的BGL_(例如,LabeledGraph){
自动源=boost::源(e,g);
//我该如何做以下工作?

//啊,我发现你的问题顺序不对:)

我不认为
labeled\u graph
adapter具有此功能。相反,就像在我的文章中一样,我建议将标签存储为顶点属性(捆绑或顶点索引)

捆绑

// g++ -O3 question.cpp -o question.exe -I. --std=c++11 -lprotobuf-lite -lpthread -lz -losmpbf
#include <iostream>

#include <boost/graph/adjacency_list.hpp>
#include <boost/graph/labeled_graph.hpp>
#include <boost/graph/iteration_macros.hpp>

struct MyVertex {
    long long label;

    MyVertex(long long label = 0) : label(label) {}
};


typedef boost::adjacency_list<boost::listS,          // Store out-edges of each vertex in a std::list
                              boost::listS,          // Store vertex set in a std::list
                              boost::bidirectionalS, // The file dependency graph is directed
                              MyVertex,              // vertex properties
                              boost::no_property     // edge properties
                              > AdjGraph;

int main() {
    AdjGraph g;

    std::map<size_t, AdjGraph::vertex_descriptor> vertex_map;

    for (int i = 1; i<6; ++i)
        vertex_map.emplace(10*i, add_vertex(10*i, g));

    boost::add_edge(vertex_map[10], vertex_map[30], g);
    boost::add_edge(vertex_map[10], vertex_map[50], g);
    boost::add_edge(vertex_map[30], vertex_map[40], g);
    boost::add_edge(vertex_map[50], vertex_map[20], g);

    BGL_FORALL_EDGES(e, g, AdjGraph) {
        auto source_n = boost::source(e, g);
        std::cerr << g[source_n].label << "\n";
    }
}
// g++ -O3 question.cpp -o question.exe -I. --std=c++11 -lprotobuf-lite -lpthread -lz -losmpbf
#include <iostream>

#include <boost/graph/adjacency_list.hpp>
#include <boost/graph/labeled_graph.hpp>
#include <boost/graph/iteration_macros.hpp>

typedef boost::adjacency_list<boost::listS,          // Store out-edges of each vertex in a std::list
                              boost::listS,          // Store vertex set in a std::list
                              boost::bidirectionalS, // The file dependency graph is directed
                              boost::property<boost::vertex_index_t, size_t>,    // vertex properties
                              boost::no_property     // edge properties
                              > AdjGraph;

int main() {
    AdjGraph g;

    std::map<size_t, AdjGraph::vertex_descriptor> vertex_map;

    for (int i = 1; i<6; ++i)
        vertex_map.emplace(10*i, add_vertex(10*i, g));

    boost::add_edge(vertex_map[10], vertex_map[30], g);
    boost::add_edge(vertex_map[10], vertex_map[50], g);
    boost::add_edge(vertex_map[30], vertex_map[40], g);
    boost::add_edge(vertex_map[50], vertex_map[20], g);

    auto index = boost::get(boost::vertex_index, g);

    BGL_FORALL_EDGES(e, g, AdjGraph) {
        auto source_n = boost::source(e, g);
        std::cerr << boost::get(index, source_n) << "\n";
    }
}