version(number) is completely useless

[Mike Parker]

On Wednesday, 20 July 2022 at 14:37:59 UTC, Andrey Zherikov wrote:

>
> What I don't like here is an assumption that `MyLibrary.5` is 
> compatible with `MyLibrary.4`,`MyLibrary.3` etc. This might not 
> be the case: versions might be backward incompatible so you 
> will have to do `version(MyLibrary.5 && !MyLibrary.4 && 
> !MyLibrary.3 && !MyLibrary.2 && !MyLibrary.1)`. And here are 
> the problems: we don't wave `&&` (yes, you can substitute it 
> with multiple `version`) and `!` (you have to do `version(bla) 
> {} else {...}`). All these workarounds keep me away from using 
> `version` - the only thing I use is `version(unittest)`.

You can use version in conjunction with enums as I do in my 
bindbc packages, e.g. 
https://github.com/BindBC/bindbc-opengl/blob/master/source/bindbc/opengl/config.d.

Then you can use whichever logical operators you want on the 
enums with static if to test for library versions at compile time.