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> Just to remind you, Lua 4.0 already had support for this kind of OO
> programming with basic types. For instance,
>   settagmethod(tag(""), "gettable", function (a,b)
>     return getglobal('str'..b)
>   end)
> >   ansiStr = "Hello"
> >   print(ansiStr:lower())

now this is cool!!
and i was always thinking that this cannot be done, because the reference
manual says:

called whenever Lua accesses an indexed variable. This method cannot be set
for tables with the default tag.

since i cannot set this tagmethod for "vanilla" tables, i never thought i
could set it for other "vanilla" types.