Compiler Error C2992

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'class' : invalid or missing type parameter list

The class is preceded by a template or generic keyword with missing or invalid parameters.

Example

The following sample generates C2992:

// C2992.cpp
// compile with: /c
template <class T> 
struct TC1 {
   template <class U>
   struct TC2;
};

template <class T>   struct TC1<T>::TC2 {};   // C2992

// OK
template <class T>
template <class U>
struct TC1<T>::TC2 {};
 // C2992 can also occur when using generics:
// C2992c.cpp
// compile with: /clr /c
generic <class T>
ref struct GC1 {
   generic <class U>
   ref struct GC2;
};

generic <class T> ref struct GC1<T>::GC2 {};   // C2992

// OK
generic <class T>
generic <class U>
ref struct GC1<T>::GC2 {};