Question

I am attempting to get Memory leak detection working with the help of these two articles:
http://msdn.microsoft.com/en-us/library/e5ewb1h3%28VS.80%29.aspx
http://support.microsoft.com/kb/q140858/

So in my stdafx.h I now have:

#define _CRTDBG_MAP_ALLOC
#include <stdlib.h>
#include <crtdbg.h>

#define new new(_NORMAL_BLOCK,__FILE__,__LINE__)

The only problem is, I have a class which overrides the new function:

class Dummy
{    
  //overloaded new operator
  void FAR* operator new(size_t cb);
}

Now when I compile this code, I get:
error C2059: syntax error : ‘constant’
error C2091: function returns function

Any idea how I can fix this?

Answer 1

You can use pragma directives to save and restore the new macro when undefing for overloads. See [MSDN](http://msdn.microsoft.com/en-us/library/hsttss76(VS.71).aspx) for the exact syntax.

E.g.

#pragma push_macro("new")
#undef new
void FAR* operator new(size_t cb);
#pragma pop_macro("new") 

You can put these in headers, e.g.

begin_new_override.h:

#ifdef new
#define NEW_WAS_DEFINED
#pragma push_macro("new")
#undef new
#endif

end_new_override.h:

#ifdef NEW_WAS_DEFINED
#undef NEW_WAS_DEFINED
#pragma pop_macro("new")
#endif

And then

#include "begin_new_override.h"
void FAR* operator new(size_t cb);
#include "end_new_override.h"