Re: very simple question about Lua C Function args check

[Francesco Abbate <francesco.bbt@...>]

2010/11/27 Drake Wilson <drake@begriffli.ch>:
> I don't think I said anything about lua_gettop.  I suggested that
> lua_settop was a nice way to normalize the stack height if you wanted
> to force unspecified trailing arguments to be nils regardless of what
> you pushed onto the stack later.
>
> luaL_opt* take any acceptable index, not just any valid index, so
> using those is fine too if they serve your purpose.

So, if I know that the stack was not alterated I can omit to use both
lua_settop and lua_gettop and just using lauL_optint & co like Julien
is suggesting ?

If I understood correctly, when the function is called I can assume
that all the acceptable indexes beyond the top contain either none or
nil so I can safely access them and test their values. I just need to
make sure that I didn't push any new values on the stack by myself.

Is this correct now ?

-- 
Francesco