添加外部属性以包含图形中的vertix索引(boost)

Question

我正在尝试使用associative_property_map来包含顶点的索引,但是我使用以下简单代码得到以下错误,问题是什么？

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

using namespace std;
using namespace boost;

struct NodeData
{
    int label;
};

struct EdgeData
{
    int age;
};

typedef map<vecS, size_t> IndexMap;
IndexMap mapIndex;
associative_property_map<IndexMap> propmapIndex(mapIndex);

typedef adjacency_list<setS, setS, undirectedS, NodeData, EdgeData> Graph;
typedef Graph::vertex_descriptor NodeID;
typedef Graph::edge_descriptor EdgeID;

int main()
{
    Graph g;

    NodeID n0 = add_vertex(g); g[n0].label = -1;
    NodeID n1 = add_vertex(g); g[n1].label = -1;

    EdgeID edge; bool ok;
    tie(edge, ok) = boost::add_edge(n0, n1, g);
    if (ok) g[edge].age = 10;

    int i=0;
    BGL_FORALL_VERTICES(v, g, Graph)
    {
        put(propmapIndex, v, i++);
    }

    return 0;
}

错误:

c:\program files\codeblocks\mingw\bin..\lib\gcc\mingw32\4.4.1........\include\boost\property_map\property_map.hpp||In

function'void boost :: put(const boost :: put_get_helper&,K,const V&)[with PropertyMap = boost :: associative_property_map,std :: allocator>

,Reference = unsigned int&,K = void*,V = int]':| C:\ Users\memo\Desktop\Debuged\boostGraph\main.cpp | 39 |从这里实例化| c:\ program files\codeblocks\mingw\bin ..\lib\gcc\mingw32\4.4.1 ........\include\boost\property_map\property_map.hpp | 361 | error:no match for' operator []'in'(const boost :: associative_property_map,std :: allocator >>>&)((const boost :: associative_property_map,std :: allocator >>>*)(&pa))[k]'| c:\ program files\codeblocks\mingw\bin ..\lib\gcc\mingw32\4.4.1 ........\include\boost\property_map\property_map.hpp | 498 |注意:候选人是:typename UniquePairAssociativeContainer :: value_type :: second_type&boost :: associative_property_map :: operator [](const typename UniquePairAssociativeContainer :: key_type&)const [with UniquePairAssociativeContainer = std :: map,std :: allocator >>] | || ===构建完成:1个错误,0个警告=== |

谢谢

Answer 1

顶点描述符必须指定给IndexMap,所以它是map<NodeID, size_t>和不是map<vecS, size_t>:

<...>
typedef Graph::vertex_descriptor NodeID;

typedef map<NodeID, size_t> IndexMap;
IndexMap mapIndex;
associative_property_map<IndexMap> propmapIndex(mapIndex);
<...>

// indexing all vertices
int i=0;
BGL_FORALL_VERTICES(v, g, Graph)
{
   put(propmapIndex, v, i++);
}