Good examples of version() algebra in real code

[Guillaume Piolat]

On Monday, 22 May 2023 at 12:41:24 UTC, Steven Schveighoffer 
wrote:
>
> One of the largest problems with this scheme is it needs to be 
> repeated in every module that uses e.g. `version(Darwin)`.
>
> -Steve

Yes, maybe add those 3 common version identifiers directly, which 
doesn't change the design of `version`.


Also maybe Hipreme's idea avoids the #ifdef hell problem 
(abondance of names and double negations).

> Maybe if there was a construct for allowing **only version 
> declaration** with boolean operators like:
`version RelaxedSystems = version(Windows && linux && !OSX)` (it 
would not be global as the `version` is right now. i.e: not allow 
this syntax to be used standalone.