[Development] API style guide: scoped enum or not?

[Hasselmann Mathias]

Am 04.05.2023 um 15:51 schrieb Sune Vuorela:
> In few cases the implicit conversion to underlying_type is kind of 
> important.
> Especially in the cases where the api has int and is mostly used with
> enums or is somehow user extendable.
>
> Qt::ItemDataRole is one of them that comes to mind.
>
> switch(role) {
>     case Qt::UserRole+1:
>     ....

I'd argue you are using role wrong. For my models I always define a 
DataRole enum. With that enum all my role related switch statements 
looks like this:

     switch (static_cast<DataRole>(role)) {
     }

Big advantage of explicitly casting the int to my DataRole: The compiler 
tells me if I forget to handle any of my supported roles.


Ciao
Mathias