Implicit conversion from const to mutable

[Balagopal Komarath via Digitalmars-d-learn]

On Thursday, 17 August 2017 at 20:22:09 UTC, Steven Schveighoffer 
wrote:
>
> This should "work". I don't think your static assert will pass, 
> but the main function below should run.

Thanks. But, isn't my static assert testing for exactly this?