Struct array assignment behaviour using example from Programming in D, chapter 78

[Ali Çehreli via Digitalmars-d-learn]

On 03/24/2016 10:24 AM, data pulverizer wrote:
 > I have been playing with the matrix example given at the end of chapter
 > 78 of Ali Çehreli's

For reference, it's "Multi-dimensional operator overloading example" here:

   http://ddili.org/ders/d.en/templates_more.html

 >having problems with overloading the opAssign operator.
 >
 > rows is a private int[][] in a Matrix struct.
 >
 > I have added the following ...
 >
 > Matrix opAssign(int[][] arr)
 > {
 >      this.rows = arr;
 >      // rows = arr // does not work either ...
 >      return this;
 > }
 >
 > However this does not work (no error occurs, it just doesn't do
 > anything)

How are you testing it? The following worked for me:

1) Added that opAssign() to the struct. (Verified that it gets called.)

2) Tested with the following code:

     auto m2 = Matrix();
     auto rows = [ [ 1, 2 ], [ 3, 4 ], [ 5, 6 ] ];
     m2 = rows;

     writeln(m2);

(I've tested with a dynamically generated 'rows' as well.)

Ali