How to get an inout constructor working with a template wrapper

[aliak]

On Sunday, 29 July 2018 at 12:45:48 UTC, Steven Schveighoffer 
wrote:
>> 
>> Am I applying inout incorrectly?
>
> No, you need to apply it to wrap as well. I can't get 
> run.dlang.io to work for posting a link, so here is my modified 
> version:
>

Ah bugger, right!

Ok so there's no way to make explicit instantiation involving 
immutable work in the face of an inout parameter? Seems rather 
inconsistent no?

https://issues.dlang.org/show_bug.cgi?id=19126

Thanks,
- Ali