我正在尝试使用嵌套类
Vertex
和Edge
创建Graph
类。我希望我的Vertex
类接受泛型参数。我已经提前声明了Vertex
类,以便在Edge
类中使用它。
当我使用模板时,出现了一些错误,我不确定如何解决。
这是我尝试的内容。每行旁边都有注释标明错误。
class Graph
{
private:
template <class T>
class Vertex; // Forward Declaration
template <class T>
vector<Vertex<T> > vertices; // Err: member 'vertices' declared as a template
class Edge
{
public:
template <class T>
Vertex<T>& _orig; // Err: member '_orig' declared as a template
template <class T>
Vertex<T>& _dest; // Err: member '_dest' declared as a template
template <class T>
Edge(Vertex<T>& orig, Vertex<T>& dest) : _orig(orig), // Err: member initializer '_orig' does not name a non-static data member or base class
_dest(dest) { }
template <class T>
Vertex<T>& getOrig() { return _orig; } // Err: use of undeclared identifier '_orig'
template <class T>
Vertex<T>& getDest() { return _dest; } // Err: use of undeclared identifier '_dest'
};
template <typename T>
class Vertex
{
public:
T _data;
vector<Edge> _edges;
Vertex(T data) : _data(data) { }
void addEdgeToVertex(Edge& edge)
{
_edges.push_back(edge);
}
};
public:
template <typename T>
void addEdge(Vertex<T>& orig, Vertex<T>& dest)
{
Edge edge(orig, dest);
orig.addEdgeToVertex(edge);
dest.addEdgeToVertex(edge);
}
};
你能帮我指出我做错了什么吗?我该如何修复这段代码?