Lua's metatables are very powerful, and there's actually a tiny implementation of "strict mode" for Lua [1]. I do agree that static checks like these would help

Lua's metatables are very powerful, and there's actually a tiny implementation of "strict mode" for Lua [1]. I do agree that static checks like these would help the language for serious applications. I recently got back into Lua a bit and the first error I made was omitting "local". [1]: http://metalua.luaforge.net/src/lib/strict.lua.html http://metalua.luaforge.net/src/lib/strict.lua.html