[haXe] overloading parent with different type

[cornel]

hi all

Nicolas,
Related to my older post, about qooxdoo: i wrote some code that would
create haxe interfaces out of qooxdoo classes, and i've encountered
the same problem:  there's a lot of methods that override methods with
the same name in the parent class. I'm not sure i understand why this
is an error.
For example, c++ has no problem with this code:

class A{
	int f(){return 0;}
};

class B:public A{
	std::string f(){return "hi";}
};

Could you please elaborate a bit?

thanks
cornel