Brainstorming: Explicit instantiation of function template with `auto ref` parameters

[monkyyy]

On Thursday, 20 February 2025 at 23:24:10 UTC, Quirin Schroll 
wrote:
> Function templates with `auto ref` parameters can’t be 
> explicitly instantiated, but must be IFTI’d to infer `ref`-ness 
> of `auto ref` parameters.
>
> [...]

unittest? Im not entirely sure its impossible