Replacing tango.text.Ascii.isearch

[torhu]

On Wednesday, 5 October 2022 at 20:45:55 UTC, torhu wrote:
> On Wednesday, 5 October 2022 at 20:40:46 UTC, torhu wrote:
>
>>
>> Am I doing something wrong here?
>
> Right, you can instantiate structs without arguments. It's been 
> ten years since I last used D, I was thinking of structs like 
> if they were classes.

I think there should be sensible default here, seems like an easy 
trap to remove.