Comment 266 for bug 1245473

(In reply to Andreas Wettstein from comment #190)
> No news since. Apart from the formal proposal, there are some old patches
> for its implementation:
> https://lists.x.org/archives/xorg-devel/2012-November/034427.html
> https://lists.x.org/archives/xorg-devel/2012-November/034430.html
> https://lists.x.org/archives/xorg-devel/2012-November/034429.html
> https://lists.x.org/archives/xorg-devel/2012-November/034431.html
> https://lists.x.org/archives/xorg-devel/2012-November/034428.html

Here's what I think we would need to do in order to not break old clients:
https://lists.freedesktop.org/archives/xorg-devel/2013-January/035049.html

Another, probably better, way to do it would be to define a new flag like XkbSA_HasGroupFlags inside the XkbModAction flags field when group_flags and group_XXX are valid rather than potentially garbage. That would avoid the whole version-negotiation nightmare, as nothing appears to be too picky about extra flags being defined.

Five years later, it would also be good to have support inside libxkbcommon (which has a pretty decent test suite) and xcb-proto for the flags.