Re: Q: Behaviour of the Lua stack

[Luiz Henrique de Figueiredo <lhf@...>]

> This C function receives 10 arguments in the Lua stack.

Oops, bad API right there...

> If I detect an error on, say, the first argument, may I do this?
> 
> if (error on the first argument) {
>   lua_pushnil(L);
>   lua_pushstring(L, "Error on first argument");
>   return 2;
> }

Yes, but if you don't want the user to handle the error, then
luaL_argerror makes it easier. See algo luaL_check*.