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Compiler Error C2243

Error Message

'conversion type' conversion from 'type1' to 'type2' exists, but is inaccessible

Access protection (protected or private) prevented conversion from a pointer to a derived class to a pointer to the base class.

The following sample generates C2243:

// C2243.cpp
// compile with: /c
class B {};
class D : private B {};
class E : public B {};

D d;
B *p = &d;   // C2243

E e;
B *p2 = &e;