[RFC] Enum improvements

[Richard Kimberly Heck]

On 11/28/20 3:42 AM, Yuriy Skalko wrote:
> Now LyX requires C++11 and we can use its new enum features:
>
> 1. Enum base type. It will allow forward declarations of enums in
> headers to break weak, unnecessary dependencies like BufferParams.h
> ---> InsetQuotes.h. This will also improve compilation speed.
>
> 2. Scoped enums. It will allow better type safety. Also some commonly
> used enum declarations can be moved out of classes (that used solely
> for limiting scope of enum values).

In case anyone else is curious, I found this explanation:

https://smartbear.com/blog/develop/closer-to-perfection-get-to-know-c11-scoped-and-ba/

The first bit, involving headers, looks most useful.

Riki