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Compiler Error C2254

'function' : pure specifier or abstract override specifier not allowed on friend function

A friend function is specified as pure virtual.

The following sample generates C2254:

// C2254.cpp
// compile with: /c
class A {
   friend void func1() = 0;   // C2254, func1 is friend
   void virtual func2() = 0;   // OK, pure virtual
   friend void func3();   // OK, friend not virtual nor pure

void func1() {};
void func3() {};