interface I1 {
    iObj:{ };
    iNum:number;
    iAny:any;
    iFn():void;
}

interface I2 {
	iFn(n:number, s:string):void;
}

class C1 implements I1,I2 {
    private iFn();
	private iFn(n?:number, s?:string) { }
    private iAny:any;
    private iNum:number;
    private iObj:{ };
}

interface I3 {
    x: number;
}

interface I4 {
    ():I3;
    new ():I3;
    [call:number]:string;
}

class C2 implements I3 {
    public x = 1;
}

var a:I4 = function(){ 
    return new C2();
}
new a();

/*var b:I4 = C2;
new b();
*/

var c:I4;
c[5];
c["foo"];