Array of interface only with cast()?

[Andre via Digitalmars-d-learn]

Hi,

I just stumbled about this issue with array of interface. I want
to pass several objects (C and D) which shares the same interface A.
It seems somehow cumbersome that it only works if there is a cast on
the first element of the array.

interface A{}

class B: A{}

class C: B{};
class D: B{};

void main()
{
        //A[] arr = [new C(), new D()]; // Does not work
        A[] arr = [cast(A) new C(), new D()]; // Does work
}

Is the cast really needed?

Kind regards
André