Article ID: 140604
Article Last Modified on 7/5/2005
APPLIES TO
- Microsoft Visual C++ 4.0 Standard Edition
- Microsoft Visual C++ 4.1 Subscription
- Microsoft Visual C++ 4.2 Enterprise Edition
- Microsoft Visual C++ 5.0 Enterprise Edition
- Microsoft Visual C++ 6.0 Enterprise Edition
- Microsoft Visual C++ 4.2 Professional Edition
- Microsoft Visual C++ 5.0 Professional Edition
- Microsoft Visual C++ 6.0 Professional Edition
- Microsoft Visual C++ 6.0 Standard Edition
This article was previously published under Q140604
SYMPTOMS
Attempting to overload member functions located in a base class from a derived class with a 'using' declaration, may result in the following compiler error:
CAUSE
This particular problem occurs if the member functions that are being overloaded are declared before the 'using' declaration in the class definition.
RESOLUTION
Place the 'using' declaration above the declarations for the member functions you want to overload. See the comments in the following code sample:
Sample Code
#include "iostream.h"
class A
{
public:
int f(int) {cout << "In A::f(int)!!!\n";return 0;}
};
class B : public A
{
public:
int f(char*){cout << "In D::f(char*)!!!\n";return 0;}
using A::f; // <<== move this above the int f(char*)
// declaration to fix the problem.
};
void main()
{
B d;
d.A::f(1);
d.f(1); // <<== C2664 happens here
d.f("Hi There");
}
STATUS
Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article.
This problem was corrected in Microsoft Visual C++ .NET.
REFERENCES
For more information on the 'using' declaration, please see:
\Visual C++ Books\C/C++\C++ Language\Reference\Declarations\ Namespaces\using Declaration
Additional query words: kbVC400bug
Keywords: kbbug kbfix kbnoupdate kbcompiler KB140604
