implement copies only functions IF there are not already present ... may I suggest this version ?

[LKSLukeStrike]

Because I my code I also need to have access to variables and be able to "force" even in case of already present this is my version of "implement"

`function Classic:defaultArg(_arg, _default, ...) -- return _arg if _arg exists in allowed ... else return _default
for _, _allowed in ipairs({...}) do
if _arg == _allowed then return _arg end
end
return _default
end

function Classic:implement(_new, _type, ...) -- implement vars or fcts or both (depending of _type) if they exist or not (depending of _new)
_new = Classic:defaultArg(_new, "all", "new", "all") -- new = only if not existing, all = even existing
_type = Classic:defaultArg(_type, "all", "var", "fct", "all") -- only vars, fcts or all
for _, _classic in ipairs({...}) do
for _key, _val in pairs(_classic) do
if self[_key] ~= nil and _new == "new" then break end
if type(_val) == "function" and _type == "vars" then break end
self[_key] = _val
end
end
end
`
Notes:

• I have changed "Object" into "Classic" ... after all the lib is called "CLassic" isn't it ?
• defaultArg is just an helper to assign a default value to an arg if it not allowed

Now I can call implement like this:
`local CCharacter = CEntity:extend() -- characters

CCharacter:implement(nil, nil, CSpriteFG)
`
Hope it helps ?
LKS