VC STL, std::map doesn't work !!

Chris Jorda
#1 / 3

std::map doesn't work !!

( Where I put CMyClass, I meant to put SerifGDI::CColour )

oops, sorry ;o)

Quote:

> Can you tell me why doing this works OK:

> typedef std::map< COLORREF, SerifGDI::CColour*, std::less<COLORREF> >
Map;

> Map map;
> for ( int i = 0; i < obj->ColourMapTablePtr->Count; i++ )
> {
> // Get the original colour
> COLORREF crColour = RGB(0, 0, 0);

> // Create an RGB colour
> CMyClass* pPointer = new CMyClass;

> // Insert the item into our map
> map[ crColour ] = pNewColour;
> }

> And this fails:

> class MyWrapper : public std::map< COLORREF, SerifGDI::CColour*,
> std::less<COLORREF> >;
> {
> MyWrapper();
> ~MyWrapper();
> };

> MyWrapper map;
> for ( int i = 0; i < obj->ColourMapTablePtr->Count; i++ )
> {
> // Get the original colour
> COLORREF crColour = RGB(0, 0, 0);

> // Create an RGB colour
> CMyClass* pPointer = new CMyClass;

> // Insert the item into our map
> map[ crColour ] = pNewColour;
> }

> Regards,

> Chris Jordan

Tue, 04 Jun 2002 03:00:00 GMT

Chris Jorda
#2 / 3

std::map doesn't work !!

Can you tell me why doing this works OK:

typedef std::map< COLORREF, SerifGDI::CColour*, std::less<COLORREF> > Map;

Map map;
for ( int i = 0; i < obj->ColourMapTablePtr->Count; i++ )
{
// Get the original colour
COLORREF crColour = RGB(0, 0, 0);

// Create an RGB colour
CMyClass* pPointer = new CMyClass;

// Insert the item into our map
map[ crColour ] = pNewColour;
}

And this fails:

class MyWrapper : public std::map< COLORREF, SerifGDI::CColour*,
std::less<COLORREF> >;
{
MyWrapper();
~MyWrapper();

Quote:

};

MyWrapper map;
for ( int i = 0; i < obj->ColourMapTablePtr->Count; i++ )
{
// Get the original colour
COLORREF crColour = RGB(0, 0, 0);

// Create an RGB colour
CMyClass* pPointer = new CMyClass;

// Insert the item into our map
map[ crColour ] = pNewColour;
}

Regards,

Chris Jordan

Tue, 04 Jun 2002 03:00:00 GMT

Joseph M O'Lear
#3 / 3

std::map doesn't work !!

Hi,

First of all, when you post such a question, it would help us if you could
also post exactly what errors you are getting.

Short of that, I can see one problem right off the bat. Your CMyWrapper
class has only 'private' default constructors. You need to make them
public.

Joe O'

Quote:

> Can you tell me why doing this works OK:

> typedef std::map< COLORREF, SerifGDI::CColour*, std::less<COLORREF> >
Map;

> Map map;
> for ( int i = 0; i < obj->ColourMapTablePtr->Count; i++ )
> {
> // Get the original colour
> COLORREF crColour = RGB(0, 0, 0);

> // Create an RGB colour
> CMyClass* pPointer = new CMyClass;

> // Insert the item into our map
> map[ crColour ] = pNewColour;
> }

> And this fails:

> class MyWrapper : public std::map< COLORREF, SerifGDI::CColour*,
> std::less<COLORREF> >;
> {
> MyWrapper();
> ~MyWrapper();
> };

> MyWrapper map;
> for ( int i = 0; i < obj->ColourMapTablePtr->Count; i++ )
> {
> // Get the original colour
> COLORREF crColour = RGB(0, 0, 0);

> // Create an RGB colour
> CMyClass* pPointer = new CMyClass;

> // Insert the item into our map
> map[ crColour ] = pNewColour;
> }

> Regards,

> Chris Jordan

Tue, 04 Jun 2002 03:00:00 GMT