@:generic proposal, 2

Array.hx

@:generic class Array<T>
{
	private var arr:NativeArrayWrapper<T>;
	public function new()
	{
		arr = new NativeArrayWrapper<T>(0); // this will be automatically replaced
	}
	
	public function get(x:Int):T
	{
		return arr.get(x);
	}
}

//this will be transformed into:

@:generic class Array<T>
{
	private var arr:NativeArrayWrapper<T>;
	
	public function new(cl:Class<T>)
	{
		arr = NativeArrayWrapper.alloc(cl, 0);
	}
	
	public function get(x:Int):T
	{
		return arr.get(x);
	}
	
	public function get_f(x:Int):Float
	{
		return arr.get_f(x);
	}
}