How to assign and compare arrays to SumType?

[Anonymouse]

On Tuesday, 11 June 2024 at 18:26:50 UTC, confuzzled wrote:
> On Tuesday, 11 June 2024 at 16:41:46 UTC, confuzzled wrote:
>> Comparison between a Variant and an array is straightforward. 
>> How does one accomplish the same between a SumType and an 
>> array?
>>
>
> Okay, this is what I came up with. Just a sanity check please. 
> Did I do this correctly? Is there something I'm overlooking?

It's enough to just make the whole array another 
`SumType!(double[])`.

```d
void main()
{
     Variant v = [1.7, 2.7, 3.7, 4.7, 5.7];
     assert(v == [1.7, 2.7, 3.7, 4.7, 5.7]);

     S s;
     s.data = [1.7, 2.7, 3.7, 4.7, 5.7]; // {2}
     assert(s.data == SumType!(double[])([1.7, 2.7, 3.7, 4.7, 
5.7]));
}
```


Or better yet, to avoid redundantly spelling out the type;

```d
     assert(s.data == typeof(s.data)([1.7, 2.7, 3.7, 4.7, 5.7]));
```