如何访问boost子图'graph'属性？

Question

我使用adjacency_list和子图适配器来创建我的图表类型。

#include <boost/graph/subgraph.hpp>
#include <boost/graph/adjacency_list.hpp>

struct VertexProperties
{
    bool bIsExpandable;          
    string sId;
    string sCoord_X;
    string sCoord_Y;
    std::size_t order;
};

struct EdgeProperties
{
    string sId;
    bool bBidirectional;
};

//Graph properties
enum graph_index_t {graph_index=111};
namespace boost{
BOOST_INSTALL_PROPERTY(graph,index);
}

typedef boost::property<boost::vertex_index_t, std::size_t , VertexProperties> vertex_prop;
typedef boost::property<boost::edge_index_t, std::size_t , EdgeProperties> edge_prop;
typedef boost::property<graph_index_t, std::size_t> graph_prop;

typedef boost::adjacency_list<
boost::listS,
boost::vecS,
boost::bidirectionalS,
vertex_prop ,
edge_prop,
graph_prop>
Graph;

typedef boost::subgraph<Graph> Subgraph;

我正在使用顶点和边的捆绑属性。 我已经尝试将捆绑属性提供给'graph'，对于adjacency_list它工作正常但不能用于子图适配器，我发现它不受boost子图适配器的支持。 所以我将graph_index_t添加到图表属性中，但我无法访问它。 我已经编写了以下属性映射来访问它，但它似乎不是正确的方法。

typedef property_map<Subgraph , graph_index_t>::type GraphIndexPropertyMap;

它在adjacency_list.hpp中给出错误

d:\boost_1_53_0\boost\graph\detail\adjacency_list.hpp:2543: error: forming reference to void

我已经检查了boost 1.53文档，但找不到与此相关的方法。

所以我有两个问题：

1）如何获得graph_index属性的读写权限？

2）我可以用某种方式使用带有boost子图的'graph'的捆绑属性吗？

有人可以帮忙吗？

谢谢，

PRATIK

Answer 1

以下是您的问题的解决方案，它使用捆绑属性和动态属性来考虑boost子图中的访问方法，如下所示：

#include <QtCore/QCoreApplication>

#include <boost/config.hpp>
#include <iostream>
#include <algorithm>
#include <boost/graph/adjacency_list.hpp>
#include <boost/property_map/property_map.hpp>
#include <string>
#include <boost/graph/subgraph.hpp>
#include <QMap>

using namespace std;
using namespace boost;

enum graph_IDproperty_t
{
   graph_IDproperty
};
namespace boost
{
  BOOST_INSTALL_PROPERTY(graph,IDproperty);
}
struct GraphProperties {
 std::string strName;
std::string id;
};

typedef boost::subgraph<boost::adjacency_list< boost::listS,
boost::vecS,
boost::bidirectionalS,
boost::property<boost::vertex_index_t, int , property<boost::vertex_color_t,   boost::default_color_type > > ,

boost::property<boost::edge_index_t,int, property<boost::edge_color_t , default_color_type> > ,

boost::property<graph_IDproperty_t,GraphProperties > > >
Graph;

Graph gMainGraph;

typedef QMap<Graph*,GraphProperties*> mapGraphToProperty;
mapGraphToProperty getMap(Graph& graph);
void graphMapRecur(mapGraphToProperty& map, Graph& graph);

int main(int argc, char *argv[])
{
   QCoreApplication a(argc, argv);

Graph& subG = gMainGraph.create_subgraph();
Graph& subG1 = gMainGraph.create_subgraph();

boost::ref_property_map<Graph*, GraphProperties>
        graph_propt1(boost::get_property(subG1,graph_IDproperty));

graph_propt1[&subG1].id = "SubG1";
cout<<graph_propt1[&subG1].id<<endl;

boost::ref_property_map<Graph*, GraphProperties>
        graph_propt(boost::get_property(subG,graph_IDproperty));

graph_propt[&subG].id = "SubG";
cout<<graph_propt[&subG].id<<endl;

boost::ref_property_map<Graph*, GraphProperties>
        graph_proptMain(boost::get_property(gMainGraph,graph_IDproperty));

graph_proptMain[&gMainGraph].id = "gMain";
cout<<graph_proptMain[&gMainGraph].id<<endl;

mapGraphToProperty map = getMap(gMainGraph);

boost::ref_property_map<Graph*, GraphProperties>
        graph_proptMain1(*(map.value(&gMainGraph)));

boost::ref_property_map<Graph*, GraphProperties>
        graph_proptsubG(*(map.value(&subG)));

boost::ref_property_map<Graph*, GraphProperties>
        graph_proptsubG1(*(map.value(&subG1)));

cout<<"Main G Value : "<<graph_proptMain1[&gMainGraph].id<<endl;
cout<<"Sub G Value : "<<graph_proptsubG[&subG].id<<endl;
cout<<"Sub G1 Value : "<<graph_proptsubG1[&subG1].id<<endl;


cout<<"Map Value Main: "<<(map.value(&gMainGraph))<<endl;
cout<<"Map Value SubG: "<<(map.value(&subG))<<endl;
cout<<"Map Value SubG1b: "<<(map.value(&subG1))<<endl;
return a.exec();
}
mapGraphToProperty getMap(Graph &graph)
{
mapGraphToProperty map;
graphMapRecur(map,graph);
return map;
}

void graphMapRecur(mapGraphToProperty &map, Graph &graph)
{
Graph::children_iterator itrSubgraph, itrSubgraph_end;

for (boost::tie(itrSubgraph, itrSubgraph_end) = (graph).children(); itrSubgraph != itrSubgraph_end; ++itrSubgraph)
{
    graphMapRecur(map,(*itrSubgraph));
}

GraphProperties* gp = &(get_property(graph,graph_IDproperty));

map.insert(&graph,gp);
cout<<"Recurrr"<<endl;

}