...field);
    writeln(d1.mul(4));

    Base b1 = d1;
    b1.print3i(1, 2, 3);

    deleteInstance(d1...

...sideways
    //B1* b1b2s = static_cast<B1*>(b2s); // error: (same)

    B1* b2b1d = dynamic_cast<B1*>(b2s...

...just fine:

```
import std.stdio;

enum {
	A1,
	B1,
	C1,
	D1
}

enum {
	_A,
	_B,
	_C,
	_D...

...S.a;
        alias a2 = s.a;
        alias b1 = S.b;
        alias b2 = s.b;
        S2...

...devam etti 😀

Teknik olarak ise, örnekteki b1 basketindeki ürün elma ve derleyici ref parametresi...

...delegate(Super))[] a1;
    const(void delegate(Sub))[] b1=a1; // ok

    Sub delegate() a2;
    Super delegate...

I don't get it - you never made use of b1 or b2...

...b1, Base b2)
    {
        return new typeof(this);
    }
}

class Derived : Base
{
    override Object createMostDerived(Base b1...

...return B.init;
    }
}
void main()
{
    auto b1 = B.init;
    b1.writeln;

    B b2 = B();
    b2...

...b1;
    b1.a = b1.a.dup;   // copy on write
    b1.a[0].i ~= '1';
    b1...