A pointer to an array without copying (Vala)

pointer-to-array.vala

unowned int[] pointer_to_array (int* p, uint length) {
	return ((int[]) p)[0:length];
}

void main () {
	int[] array = {111, 222, 333};
	int* p = array;
	unowned int[] array2 = pointer_to_array(p, array.length);
	array[0] = 777;
	
	print("%d %d %d\n", array[0], array[1], array[2]); // 777, 222, 333
	print("%d %d %d\n", array2[0], array2[1], array2[2]); // 777, 222, 333
}