Renaming first and second of a map iterator

Question

Is there any way to rename the first and second accessor functions of a map iterator. I understand they have these names because of the underlying pair which represents the

Answer 1

You can't rename the members, but you can have some functions to help.

inline Vertex& vertex(map<Vertex, Edge>::iterator& it) {return it->first;}
inline Edge& edge(map<Vertex, Edge>::iterator& it) {return it->second;}

Then, instead of it->vertex like you want, you can do vertex(it)

Answer 2

If you're just concerned about readability you could do something like this:

typedef map<Vertex, Edge> AdjacencyList;
struct adjacency
{
    adjacency(AdjacencyList::iterator& it) 
      : vertex(it->first), edge(it->second) {}
    Vertex& vertex;
    Edge& edge;
};

And then:

Vertex v = adjacency(it).vertex;