How to convert c++ std::list element to multimap iterator

Hello all
i have
std::list<multimap<std::string,std::string>::iterator> >

now i have new element :
multimap<std::string,std::string>::value_type aNewMmapValue("foo1","test")
i want to avoid the need to set temp multimap and do insert to the new element just to get its iterator back
so i could to push it back to the:
std::list<multimap<std::string,std::string>::iterator> >
can i somehow avoid this creation of the temp multimap.

If you are storing a list of multimap iterators, then the original values MUST exist in a multimap somewhere, otherwise the iterator to it will be invalid.

Also be aware that if the multimap should re-assign it's internal storage then all of your iterators in the list will be invalidated.

Quote:

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Originally Posted by umen

Hello all
i have
std::list<multimap<std::string,std::string>::iterator> >

now i have new element :
multimap<std::string,std::string>::value_type aNewMmapValue("foo1","test")
i want to avoid the need to set temp multimap and do insert to the new element just to get its iterator back
so i could to push it back to the:
std::list<multimap<std::string,std::string>::iterator> >
can i somehow avoid this creation of the temp multimap.

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I'm trying to understand the reason behind you trying to convert an iterator in the first place.
If you recall, map::insert() that takes a single argument of value_type() returns a pair,
so you can do something like

Code:

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#include <iostream>
#include <string>
#include <list>
#include <map>

using namespace std;

int main()
{
    typedef multimap<string, string>::value_type valType;
    typedef multimap<string, string>::iterator iterType;

    // sample data
    multimap<string, string> mMap;
    list<iterType> List;

    valType viter("Key", "Value");
    List.push_back(mMap.insert(viter));

    return 0;
}

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without creating a temp map, so there's no need for conversion here.
But I could be totally wrong about what you're asking here.
If this was way off,
then maybe use std::pair? (I haven't tried it yet) to make a bridge?
or something like that...