Pure Factory Functions 💔 `inout`

[Kagamin]

On Thursday, 9 February 2023 at 18:47:17 UTC, Steven 
Schveighoffer wrote:
> a `pure` function which takes an `inout` reference and returns 
> a `mutable` reference should always be implicitly convertible 
> to anything you want. It's no different from `const` in this 
> regard.

That's a weakly pure function, so its return value can convert 
only to const. Maybe it can convert to inout too, but the 
language doesn't recognize this pattern.