proposed @noreturn attribute

[sarn via Digitalmars-d]

On Sunday, 9 July 2017 at 00:16:50 UTC, Walter Bright wrote:
> We have types that cannot be named (Voldemort types), types 
> that have no type (void), I suppose that types that cannot 
> exist will fill out the edge cases of the menagerie.
>
> I assume there is a standard jargon for this - does anyone know 
> Type Theory?
>
> Are there any other interesting uses for a type that cannot 
> exist?

In pure functional languages, that's what "bottom" or Haskell's 
Void is.

In Curry–Howard "programs are proofs" theory, a type is a 
proposition and an instance is a proof.  A type with no instance 
is a proposition that can't be proved.

https://codewords.recurse.com/issues/one/type-systems-and-logic

I'm not sure how much impact this has on everyday D programming, 
but hey, it's a thing.