Cast a 2d static array to a 1d static array. T[s][r] -> T[s*r]

TheFlyingFiddle none at none.com
Tue Feb 27 22:21:55 UTC 2018


On Tuesday, 27 February 2018 at 22:17:25 UTC, Jonathan wrote:
> On Tuesday, 27 February 2018 at 22:13:05 UTC, Jonathan wrote:
>> Is it possible to cast a 2d static length array to a 1d static 
>> length array?
>>
>> E.g.
>> int[2][2] a = [[1,2],[3,4]];
>> int[4]    b = cast(int[4])a;
>>
>> Is not the byte data in memory exactly the same?
>
> *( [pos,size].ptr .cst!(void*) .cst!(int[4]*) )
> (using dub `cst` library) or
> *( cast(int[4]*)(cast(void*)([pos,size].ptr)) )
>
> Okay, this works but is this the best way?!

This should work
int[4] b = *(cast(int[4]*)a.ptr);


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