c++: How to transform a map iterator which point to pair into a “regular” pair pointe

[danalovesc]

those are the maps:

 multimap<SortKey,T> firstMap;
    multimap<SearchKey,pair<SortKey,T>*> secondMap;
 
 
    template <class T,class SortKey, class SearchKey> bool GarageDataBase<T,SortKey,SearchKey>::Add(T data,SortKey key1, SearchKey key2) 
    {
     multimap<SortKey,T>::iterator it;
     it=(firstMap.insert(pair<SortKey,T>(key1,data)));
     pair<SortKey,T> *mizi=&*it;
 
     secondMap.insert(pair<SearchKey,pair<SortKey,T>*>(key2,mizi));
     return true;
    }
 

I am trying to insert a pair into the firstMap and get a pointer to this pair and insert it into the "second" field in the secondMap

so that i could go into my firstMap from the secondmap.

pair<SortKey,T> *mizi=&*it;

this doesn't compile saying :

error C2440: 'initializing' : cannot convert from 'std::pair<_Ty1,_Ty2> *' to 'std::pair<_Ty1,_Ty2> *'


any idea whats going on or maybe a better way to make it work?

[weaknessforcats]

As I see it your wamt to have an iterator from firstMap be the data for the pair in seciond Map.

So this would be your secondMap:

multimap<SortKey,multimap<SortKey,int>::iterator > secondMap;

Then you get an iterator from firstMap:

     multimap<SortKey,T>::iterator it; 
     it= firstMap.find(key1,data) 

and insert it as the data value in secondMap:

    pair<SortKey,multimap<SortKey,int>::iterator > mizi;
    mizi.first = key2;
    mizi.second = it;
     secondMap.insert(mizi); 

Of course, I may be misunderstanding your purpose. If so, please excuse me and I'll try again.