[RFC] [Discussion] Typed class constants

Hi Everyone, A few years ago, Benas Seliuginas announced the "Typed constants" RFC ( https://externals.io/message/110755) which apparently had a positive reception overall. Unfortunately, there were some issues with the implementation (namely, with the parser) so the RFC was stuck. A few weeks ago, I reached out to Benas whether he intended to resurrect the proposal, but due to time constraints, he couldn't, and was OK with me continuing it. With some help from Bob Weinand, I managed to overcome the implementation difficulties, and adapted it to the newly added type-related features. Please find the updated RFC here: https://wiki.php.net/rfc/typed_class_constants. Regards, Máté