RfC for language feature: rvalue struct

[Paul Backus]

On Wednesday, 25 January 2023 at 16:23:51 UTC, FeepingCreature 
wrote:
> Before I take on the effort of writing up and submitting a DIP, 
> let me solicit feedback and see if anyone can see a reason why 
> this idea is dumb and doesn't work.
>
> tl;dr: `immutable struct` was a mistake: it's too weak. `rvalue 
> struct` is what we really want.
>
> [...]

I agree that `immutable struct` is a mistake. It's a weird 
special case in the language, and because of that most D code is 
not prepared to deal with it.

I am not convinced that the solution to this is to introduce a 
new language feature that is even weirder and specialer.