Re: Lua registry, environment, and threads.

["Juris Kalnins" <juris@...>]

On Tue, 12 Jan 2010 00:24:06 +0200, Sean Conner <sean@conman.org> wrote:

> It was thus said that the Great Juris Kalnins once stated:
> > I wish there was support for dynamic scoping, too...
>
>   Before I weigh in on support for dynamic scoping (and my default  
> position
> on dynamic scoping is "no"), what exactly, do you mean by dynamic scoping
> (just so I know what's on the table exactly).

When value to variable binding is active while the defining scope is  
active,
and variable name is globally visible. Like this:

do
  a=1
  do
    a=2
    g() -- access to a gives 2
  end
  -- a == 1
end

In Lua, error handlers (pcalls) have dynamic scoping.