Re: RTTI CObject question

From:

Stuart Redmann <DerTopper@web.de>

Newsgroups:

microsoft.public.vc.mfc

Date:

Mon, 16 Jul 2007 09:47:11 +0200

Message-ID:

<f7fb10$3ih$1@news.dtag.de>

Bryan wrote:

If I have this:
// .h
class Base : public CObject
{
public:
DECLARE_DYNAMIC(Base)
}

class Derived : public Base
{
public:
DECLARE_DYNAMIC(Derived)
}

If I try to do something like this in the .cpp file, Im not getting what
I expected:
// .cpp stuff
IMPLEMENT_DYNAMIC(Base, CObject)
IMPLEMENT_DYNAMIC(Derived, Base)

Derived derived_class;
BOOL b = derived_class.IsKindOf(RUNTIME_CLASS(Derived));
// This returns false!

BOOL b = derived_class.IsKindOf(RUNTIME_CLASS(Base));
// Returns true...

I thought from reading the docs that that BOTH of these would return
true. This is in fact the kind of behavior I am looking for, but so far
no luck.

What am I doing wrong, or how can I get this functionality?

Can't verify this behaviour. The following program outputs 11, just as expected.

#include <afx.h>
#include <iostream>

using namespace std;

class Base : public CObject
{
public:
   DECLARE_DYNAMIC(Base)
};

class Derived : public Base
{
public:
   DECLARE_DYNAMIC(Derived)
};

IMPLEMENT_DYNAMIC(Base, CObject)
IMPLEMENT_DYNAMIC(Derived, Base)

int main ()
{
   Derived derived_class;
   cout << derived_class.IsKindOf(RUNTIME_CLASS(Derived));
   cout << derived_class.IsKindOf(RUNTIME_CLASS(Base));
}

Regards,
Stuart