Article: Q166109
Product(s): Microsoft C Compiler
Version(s): winnt:5.0
Operating System(s):
Keyword(s): kbtool kbVC500bug kbVC600fixkbbuglist
Last Modified: 04-MAY-2001
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The information in this article applies to:
- The C/C++ Compiler (CL.EXE), used with:
- Microsoft Visual C++, 32-bit Enterprise Edition, version 5.0
- Microsoft Visual C++, 32-bit Professional Edition, version 5.0
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SYMPTOMS
========
The compiler generates a compiler error C2248 as follows:
Error C2248: 'member' : cannot access member declared in class 'class'
under the following circumstances:
- If a class declares a template function as a friend function, and
- If the template function definition appears after the class definition.
RESOLUTION
==========
Do not declare a template function as a friend of a class.
STATUS
======
Microsoft has confirmed this to be a problem in the Microsoft products that are
listed at the beginning of this article.This problem was corrected in Microsoft
Visual C++ version 6.0.
MORE INFORMATION
================
The following sample demonstrates the problem and the workaround.
Sample Code
-----------
/*
Compile option: None
*/
class X;
template <class T> void AFunction(X &x, T &t);
class X
{
private:
int m_n;
public:
template <class T> friend void AFunction(X &x, T &t) ;
};
template <class T> void AFunction(X &x, T &t)
{
x.m_n = t; // C2248 here.
}
int main()
{
X x;
int n;
AFunction(x, n);
return 0 ;
}
NOTE: Defining the template function before the class definition eliminates the
compiler error C2248. But the compiler does not generate any code when you call
the template function.
Additional query words:
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Keywords : kbtool kbVC500bug kbVC600fix kbbuglist
Technology : kbVCsearch kbAudDeveloper kbCVCComp
Version : winnt:5.0
Issue type : kbbug
Solution Type : kbfix
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