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Let’s assume there is such class hierarchy:
class A //base class class B //interface class C : public A, public B
Then C object is created:
A *object = new C();
Is it possible to cast object to B ?
Important: I assume I don’t know that object is C. I just know that it implements interface B
No. This is not possible (direct casting from
Because the address of
B are at different locations in
class C. So the cast will be always unsafe and possibly you might land up in unexpected behavior. Demo.
The casting should always go through
class C. e.g.
A* pa = new C(); B* pb = static_cast<C*>(pa); ^^^^ go through class C