Goofing around with TypeScript, interfaces, inheritance, generics etc...

gistfile1.ts

interface IAmSomeInterface {
    getNumber(): number;
}

interface IAmAGenericInterface<T extends IAmSomeInterface> {
    getInstanceOfSomeInterface(id: number): T;
}

class ClassExtendingSomeInterface implements IAmSomeInterface {
    getNumber() {
        return 1;
    }
}

class Test implements IAmAGenericInterface<ClassExtendingSomeInterface> {
    public getInstanceOfSomeInterface(id: number) {
        //return new ClassExtendingSomeInterface();
        return (function () {
            return {
                getNumber: function () { return 2; }
            };
        })();
    }
}

class Test2 extends Test {
    public getInstanceOfSomeInterface(id: number) {
        return super.getInstanceOfSomeInterface(id);
    }
}

var x = new Test();
var x2 = new Test2();