RE: C++ binding

[Timothée VERROUIL <dreamothee@...>]

Thanks a lot :)
so I have to implemente __index as a function.
But how can I do that in C++ ???

Tim

> From: jerome.vuarand@gmail.com
> Date: Fri, 8 Apr 2011 09:04:44 +0200
> To: lua-l@lists.lua.org
> Subject: Re: C++ binding
>
> 2011/4/7 Timothée VERROUIL <dreamothee@hotmail.com>:
> > I don't get any error.
> > When I write : local toto = myObject.myAttribute ; Lua consider
> > myObject.myAttribute as a function
>
> That's __index can be implemented in two ways, and you're using the
> wrong one. Your statement is either equivalent to:
>
> local toto = getmetatable(myObject).__index.myAttribute
>
> or to:
>
> local toto = getmetatable(myObject).__index(myObject, "myAttribute")
>
> The first one is used if __index is a table, and the second one if
> __index is a function. Since your __index is a table, and the
> "myAttribute" field of that table is a function, that's what you get.
>
> To have the _expression_ "local toto = myObject.myAttribute" call a
> getter, you need to implement __index as a function (see the manual
> for the expected prototype, or ask here).
>
> > and when I print the value of toto, it's nil :(
>
> Actually toto should be a function, not nil. How did you determine
> that "myObject.myAttribute" is a function, but "toto" is nil ?
>