typo mapNode[6]* exits; instead of mapNode*[6] exits; but whats it mean ?

[Simen Kjærås]

On Wednesday, 10 October 2018 at 13:24:42 UTC, Codifies wrote:
> I'm not sure I understand what mapNode[6]* means! (the second 
> version is what I wanted an array of 6 pointers)
>
> oddly when assigning a null to one element of the array it 
> cause an error as it was trying to do an array copy... so 
> what's going on and what does that definition actually mean ?

mapNode[6]* can be read right-to-left as 'a pointer to an array 
of 6 mapNodes'.

For simplicity, let's use int instead of mapNode:

unittest {
     int[6]* p;
     int[6] arr;
     p = &arr;
     (*p)[0] = 1;
     (*p)[1] = 2;
     (*p)[2] = 3;
     (*p)[3] = 4;
     (*p)[4] = 5;
     (*p)[5] = 6;
     assert(arr == [1,2,3,4,5,6]);
}

--
   Simen