• Rishub Nagpal (18/18) Jul 24 2014 1 class Test
• John Colvin (6/24) Jul 24 2014 Why do you need to pass the array by reference? D's slices are
• Rishub Nagpal (3/29) Jul 24 2014 Ah I did not know that. jwhear on IRC cleared it up for me

"Rishub Nagpal" <rishubster gmail.com> writes:

   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

"John Colvin" <john.loughran.colvin gmail.com> writes:

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.

"Rishub Nagpal" <rishubster gmail.com> writes:

On Thursday, 24 July 2014 at 16:15:44 UTC, John Colvin wrote:
 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.


Ah I did not know that. jwhear on IRC cleared it up for me
http://dpaste.dzfl.pl/c7ae7e71d45c