DIP1028 - Rationale for accepting as is

[Johannes Loher]

Am 26.05.20 um 15:10 schrieb Panke:
> 
> The bazel community has lots of such switches. Basically every new
> behaviour get's introduced with a --preview switch, that will turn into
> a --revert after some time.
> 
> For each switch there is a github issue, explaining the change it
> detail. Why it was necessary, what the changed behaviour is, how to
> migrate and the timeline for this particular switch.

D has the same thing (e.g. -preview=safedefault will enable this DIP).
The main difference to Johannes T's suggestion is that these preview and
revert switches are only a temporary measure to ease the transition.
They do not create different versions of the language permanently.