Algebraic template instance holder

[Voitech via Digitalmars-d-learn]

Hi, why this is not working ?


class Base{
        int a;
}

class BaseTemplate(E):Base{
        E value;
        this(E value){
                this.value=value;
        }
}

class Concrete:BaseTemplate!int{
        this(int value){
                super(value);
        }
}
unittest{
        Algebraic!(Concrete) holder;
        Concrete a=new Concrete(4);
        holder =Algebraic!Concrete(a);
}