Re: functions and upvalues

["Wesley Smith" <wesley.hoke@...>]

You're right.  I will just have to make a table and pass it in.

thanks,
wes

On 5/31/07, Will Leshner <will.leshner@gmail.com> wrote:
> On 5/31/07, Wesley Smith <wesley.hoke@gmail.com> wrote:
>
>
> > What I'd like is f1's val upvalue to refer to constructor's local
> > variable val.  Is this possible somehow through environments?
>
> It looks like you are expecting dynamic scoping, but I believe Lua
> uses static scoping (which is actually a really good thing as upvalues
> and closures wouldn't work at all with dynamic scoping).
>
> Wikipedia appears to have a pretty good page describing the difference
> between dynamic and static scope, and there's even an example they use
> to compare the two that looks a lot like your example. The page in
> question is here:
>
> <http://en.wikipedia.org/wiki/Scope_(programming)>