initializing a static array

[kinke]

On Tuesday, 10 October 2017 at 14:15:07 UTC, Simon Bürger wrote:
> On Tuesday, 10 October 2017 at 13:48:16 UTC, Andrea Fontana 
> wrote:
>> Maybe:
>>
>> double[n] bar = 0.repeat(n).array;
>
> This works fine, thanks a lot. I would have expected `.array` 
> to return a dynamic array. But apparently the compiler is smart 
> enough to know the length. Even the multi-dimensional case 
> works fine:
>
> double[n][n] bar = 0.repeat(n).array.repeat(n).array;

I hope this is not performance-critical code. The assembly is 
terrible for such code, at least for LDC, doing a GC allocation, 
unrolled reset to zero, then memcpying the dynamic array back to 
the stack: https://godbolt.org/g/uXBN75

`double[n] bar = void; bar[] = 0;` (2 lines, granted) results in 
a memset.