How can I check to see if template type is an array?

[Tim]

On Tuesday, 19 January 2021 at 22:36:47 UTC, Paul Backus wrote:
> On Tuesday, 19 January 2021 at 22:34:04 UTC, Tim wrote:
>> On Tuesday, 19 January 2021 at 22:31:47 UTC, Paul Backus wrote:
>>> You've almost got it. The correct syntax is `is(T == U[], 
>>> U)`. You can read it as "there exists some type U such that T 
>>> == U[]".
>>
>> Thanks! Do I need to specify U in the template function?
>
> No, only inside the is(...) expression.

What if it is a static array i.e. double[3]?