This documentation is archived and is not being maintained.

Compiler Error C2931

Error Message

'class' : type-class-id redefined as a member function of 'identifier'

You cannot use a generic or template class as a member function of another class.

This error can be caused if braces are improperly matched.

The following sample generates C2931:

// C2931.cpp
// compile with: /c
template<class T> 
struct TC { }; 
struct MyStruct {
   void TC<int>();   // C2931

struct TC2 { }; 
struct MyStruct2 {
   void TC2();

C2931 can also occur when using generics:

// C2931b.cpp
// compile with: /clr /c
generic<class T> ref struct GC {};
struct MyStruct {
   void GC<int>();   // C2931
   void GC2();   // OK