[Development] QML: Why C++11 scoped enums are not scoped in QML?

Olivier Goffart olivier at woboq.com
Tue Jul 26 20:08:52 CEST 2016

On Dienstag, 26. Juli 2016 08:33:31 CEST Thiago Macieira wrote:
> Em terça-feira, 26 de julho de 2016, às 17:50:38 PDT, BogDan Vatra escreveu:
> > Hi,
> > 
> > Is there any reason why C++11 scoped enums are not scoped in QML ?
> There's no trait to tell apart a scoped enum from an unscoped one. An enum
> is en enum, that's all.
> If you want a given enum to be scoped in QML, it should be a QML engine
> feature and should be available to any C++ enum, whether it's scoped or not.
> > If I have something like the following code in C++
> [cut]
> >  Q_ENUM(MyEnum)
> This is all the engine sees. It's an enum.

It's trivial to let QMetaEnum know about scoped enum:


That said, it would be a behavior change not to allow anymore the previous 
(unscoped) syntax to work with QML


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