FIX: C2985 Error When Template Class Has Static Data Member (135536)

   C2985 <var name> : invalid static data member; template class < template
   class name> already has a function member of the same name.
					

STATUS

Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. This bug was corrected in Microsoft Visual C++, 32-bit Edition, version 4.0.

Sample Code

/* Compile options needed: None (compiler defaults will do)
*/ 
struct A {
//   A() {}  // ctor added for explicit initialization
   void some_funct(){}
};
template <class T> struct B {
    static A static_member;
    void func() { static_member.some_funct(); }
};
// error will occur on the following line:

template <class T> A B<T>::static_member /* = A() */ ;

void main()
{
   B<int> b;

   b.func();
}
				

This code, as shown, generates the error. To work around the problem, change the line where A() is declared and defined from a comment into an executed line, and do the same for the = A() on the line where the error is occurring. This explicitly initializes the data member when it is declared.