class Base(T)
{
public:
    S add(S : T)(S child){return child;}
    //void add(T){}
}

class Foo
{}

class Bar : public  Base!Bar
{
public:
    alias Base!Bar.add add;
    void add(Foo f){}
}


void main()
{
    Bar b = new Bar();
    Bar b2 = new Bar();
    Foo f = new Foo();
    b.add(f);
    b.add(b2);
    /*
    main.d(14): Error: alias main.Bar.add conflicts with function main.Bar.add at main.d(15)
    */
}