Re: a struct as an multidimensional array index

[Ali Çehreli via Digitalmars-d-learn]

On 6/10/22 07:38, Ali Çehreli wrote:

> I played with that toString function but for some reason it prints all
> Ts. (?)
Fixed it by changing one of the lambdas to take by reference:

  void toString(scope void delegate(in char[]) sink) const {
    import std.algorithm;
    sink.formattedWrite!"%-(%-(%s %)\n%)"(
      elements[].map!((ref row) => row[].map!(column => column ? 'T' : 
'f')));
                  //   ^^^
  }

I still don't understand the reason though. The rows would be copied 
without ref but should retain their type as bool[3], a static array. (?)

Ali