convert int[][] to int**

[Chris Williams]

On Thursday, 20 February 2014 at 17:02:15 UTC, Dicebot wrote:
> You can't do it without allocation because memory layout is 
> different for int** and int[][] in D - are.ptr in latter points 
> to slice struct (pointer+length) as opposed to raw pointer in 
> former.

You should only have to copy the top list, though.

int*[] temp = new int*[ arr.length ];
for (size_t i = 0; i < arr.length; i++) {
     temp[i] = arr[i].ptr;
}
int** output = temp.ptr;

Untested.