Interface Limitations in D

[Ogi]

On Sunday, 19 September 2021 at 20:00:11 UTC, Elmar wrote:
> * **Non-polymorphic inheritance exists (`alias this` in 
> `struct`s or `class`es) but no non-polymorphic `interface`s for 
> structs**
>
>       This one is most meaningful.
>
>       In my current project in D, I'm working on a low or 
> medium-low level and it's not suitable to use classes (they 
> also need to work in Better-C). I don't need polymorphy. I only 
> like to guarantee a **consistent** interface among my 
> `struct`s. It makes life of users easier and prohibits others 
> from "inheriting" my struct properties in unintended ways.
>

Sounds like what 
[concepts](https://code.dlang.org/packages/concepts) package 
does. Unfortunately, doesn’t work with BetterC.