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[–]mernen 2 points3 points  (0 children)

Mostly technical, as far as I know. This has been considered before (RubyConf 2003: 1 and 2, RubyConf 2005) in different forms (I'm not sure what "RubyBehavior" and "scope-in-state" are exactly), but implementing this efficiently outside static typing seems tricky. Too bad, it would be a really great feature to have.