require("import") -- the import fn import("enum_plus") -- import lib ep=enum_plus -- catch "undefined" global variables local env = _ENV -- Lua 5.2 if not env then env = getfenv () end -- Lua 5.1 setmetatable(env, {__index=function (t,i) error("undefined global variable `"..i.."'",2) end}) assert(ep.iFoo_Phoo == 50) -- Old variant of enum bindings assert(ep.iFoo.Phoo == 50) -- New variant of enum bindings