std::pair<_Ty1,_Ty2>::pair<_Ty1,_Ty2>& Cannot convert parameter

Question

I'm new to std::map , started using it only recently.

I'm facing a compilation issue with one of these mappings.

I have a custom structure, and am trying to create a mapping of a CString , with objects of that structure type.

Unfortunately, I'm facing issues

Error 3 error C2664: 'std::pair<_Ty1,_Ty2>::pair(const std::pair<_Ty1,_Ty2> &)' : cannot convert parameter 1 from 'ItemInfo *' to 'const std::pair<_Ty1,_Ty2> &'

ItemInfo is the structure, to which I'm trying to define a mapping using a CString .

This is how I define the mapping..

   struct ItemInfo
   {<some code>}

   class XXXX
   {
      std::map<CString, ItemInfo> myMap;
   }

I'm not sure how exactly to solve this, or what I should be looking at.

If someone could tell me what this error is, and how I can solve it, it would be appreciated, thanks.

EDIT

OK - I searched a lot, but still couldn't see the error in my insert() function. This is what I use:

mAlarmListMpa.insert(tempIterator /*the iterator over the map */, std::pair<CString, ItemInfo>(tagname , info));

EDIT Bit more information from the Output :

`

c:\\program files (x86)\\microsoft visual studio 10.0\\vc\\include\\xmemory(208): error C2664: 'std::pair<_Ty1,_Ty2>::pair(const std::pair<_Ty1,_Ty2> &)' : cannot convert parameter 1 from 'ItemInfo' to 'const std::pair<_Ty1,_Ty2> &' 1> with 1> [ 1> _Ty1=const CString, 1> _Ty2=ItemInfo 1> ] 1> Reason: cannot convert from 'ItemInfo' to 'const std::pair<_Ty1,_Ty2>' 1> with 1> [ 1> _Ty1=const CString, 1> _Ty2=ItemInfo 1> ] 1> No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called `

Answer 1

Some code you're not showing us is trying to pass a pointer to ItemInfo where it should be passing a key-value pair, presumably std::pair<CString, ItemInfo> . The full error message should show you which line of code is doing that.