map of pairs

[dave2k]

i am having a problem trying to populate a map of pairs:

typedef std::pair<BotWindowCropArea*,BotWindowTestElements*> OCRComponent;
std::map<int,OCRComponent> ocrcomponents;

now when i try the following:

OCRComponent tmpocrcmp;
ocrcomponents.insert(0,tmpocrcmp);

i get the following compiler errors:

error C2439: 'std::pair<_Ty1,_Ty2>::first' : member could not be initialized with [ _Ty1=const int, _Ty2=OCRComponent ]
error C2440: 'initializing' : cannot convert from 'BotWindowCropArea *const ' to 'const int'
error C2664: 'std::pair<_Ty1,_Ty2>::pair(const std::pair<_Ty1,_Ty2> &)' : cannot convert parameter 1 from 'BotWindowTestElements *const ' to 'const std::pair<_Ty1,_Ty2> &'with[    _Ty1=BotWindowCropArea *,    _Ty2=BotWindowTestElements *]and[    _Ty1=BotWindowCropArea *,    _Ty2=BotWindowTestElements *]

Anyone know why? Cheers!

[SuperKoko]

Try:

ocrcomponents.insert(std::map<int, OCRComponent>::value_type(0, ocrcomponents));

std::map::insert expects a std:air<key, value> (which is the same as std::map<key, value>::value_type) parameter.
There is also two-args version of std::map::insert... That's the version you used without knowing it. There is a two-args std::map::insert which takes a map iterator as first parameter, indicating the position where to insert. And there is a two-args std::map::insert which copies the data described by an aribtrary iterator range.

// inside class map

   pair<iterator, bool> insert (const value_type& x);

   iterator insert (iterator position, const value_type& x);
   template <class InputIterator>

    void insert (InputIterator first, InputIterator last);