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Compiler Error C3240

Error Message

'function' : must be a non-overloaded abstract member function of 'type'

A base type contained a function that was defined. Function must be virtual.

Example

The following sample generates C3240.

// C3240.cpp
// compile with: /c
__interface I {
   void f();
};

struct A1 : I { 
   void f() {}
};

struct A2 : I { 
   void f() = 0;
};

template <class T> 
struct A3 : T {
   void T::f() {}
};

template <class T> 
struct A4 : T {
   void T::f() {}
};

A3<A1> x;   // C3240
A3<I> x2;
A4<A2> x3;

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