Hey
I think flosoftware probably meant defining a Swift class from Lua, as one could do with, say, LuaCocoa.
I'm not an expert on Swift, but it's not currently a particularly dynamic language, so it may not actually be possible to define entirely new classes at runtime. Its creator, Chris Lattner, spoke about this on the
atp.fm podcast recently and said that dynamicism is planned for Swift.
Cheers,
Chris