Is inc function part of the library ?

[Adam D. Ruppe]

On Thursday, 13 May 2021 at 17:48:34 UTC, kdevel wrote:
> Then D's pure does not match up with WP's definition [1] of 
> pure, at least not

Yeah, D's pure is actually useful without being a huge hassle. 
Makes it into a useful building block that can be used inside 
other scenarios than the purely pure does.

If you want immutable, that's a separate thing in D. You can use 
it on its own, or combine it with D pure to get to the full 
formal pure definition.