Re: Passing an array by reference?

[John Colvin via Digitalmars-d-learn]

On Thursday, 24 July 2014 at 16:06:00 UTC, Rishub Nagpal wrote:
  1 class Test
  2 {
  3     int[][] array;
  4     this(ref int[][] d)
  5     {
  6         array = d;
  7     }
  8
  9 }
 10
 11 void main()
 12 {
 13     Test t = new Test([[1,1],[1,1]]);   //does not compile
 14 }
 15

what is the best way to pass a literal ([[1,2],[3,4]]) by 
reference? Is using ref the best way? I am still a bit fuzzy 
with in/out and scope

Why do you need to pass the array by reference? D's slices are 
just windows on to memory, they don't copy the contents when you 
pass them around.

Anyway, if you do need ref, the problem is that [[1,1],[1,1]] is 
a temporary, an rvalue, and ref can't take rvalues.