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Compiler Error C2427

'class' : cannot define class in this scope

An attempt was made to define a nested class, but the nested class is a member of a base class, not the most containing class.

The following sample generates C2427:

// C2427.cpp
// compile with: /c
template <class T> 
struct S {
   struct Inner; 

struct Y : S<int> {}; 

struct Y::Inner {};   // C2427

// OK
template<typename T>
struct S<T>::Inner {};