Shifting values within an array

[Chris Williams]

I would like to be able to do something like this:

class A {
	int i;
}

int main() {
	A[] list;

	for (uint L = 0; L < 3; L++) {
		for (uint L2 = 0; L2 < 3; L2++) {
			uint index = L + L2;

			uint copyAmount = list.length - index;
			list.length = list.length + 1;
			if (copyAmount > 0) {  // Move data after index one slot later to make room
				A[] sliceFrom = list[index .. (index + copyAmount)];
				A[] sliceTo = list[(index + 1) .. (index + 1 + copyAmount)];
				sliceTo[] = sliceFrom[];
			}
			list[index] = new A();
			list[index].i = index;
		}
	}

	return 0;
}

I have a running implementation which uses C's memmove(), but I gather that this isn't a safe means to do it as the garbage collector
might run while the references to the object are being manipulated. Is there a way to do this outside of a loop?