Implicit conversion to mutable if no indirections?

[Daniel N]

On Saturday, 3 September 2022 at 01:50:05 UTC, Steven 
Schveighoffer wrote:

> It's not just that, there is no syntax to say to IFTI, "if you 
> match type T, I really want you to use type U". It would 
> actually be nice, but I don't know how it can be done.
>
> -Steve

C++ solved this... maybe we could add this feature to D?

https://en.cppreference.com/w/cpp/language/class_template_argument_deduction#:~:text=x%7B2.0%2C%201%7D%3B-,User%2Ddefined%20deduction%20guides,-The%20syntax%20of