Feature request, C++, support for std::variant / std::visit

[ulfhammarqvist-st]

Parsing unions in c++ can be error prone, in the sense there's no compile time guarantee to handle all cases unless using some combination of the enum and corresponding x_as_y.

A more modern alternative is to use std::variants and std::visit, however flatc is not producing the required variants, or any means to convert to such (afaik).

... is this something that was ever discussed?