Feature request: Make `%+%` into an S3 generic

[billdenney]

In situations when I'm using the ggtibble package, I want to be able to use any operations that can occur on a gg object on a ggtibble and gglist object.

I would like to be able to use %+% on a ggtibble object, but it is not generic, so I can't easily use it. If package load order is ggtibble then ggplot2, the ggplot2 %+%function will be used instead of a generic fromggtibble`.

[teunbrand]

Hi there, thanks for the suggestion! This has been suggested before in #5536 (comment). The larger issue of encoding custom behaviour for custom classes of ggplot2-like object has been discusssed in #3815. The reasoning at the time was that we don't want to export %+% as a generic, as we should solve this problem with proper double dispatch. S4 was excluded due to its rigity and S7 was entertained for a while. A proof of concept was coined in #5537, but we felt S7 wasn't ready yet. In any case, to keep all related discussion in one place, I'm going to close this issue in favour of #5536.

[billdenney]

Thanks!