Re: Declaring a local dynamic variable?

[Andreas Röhler]

Am 25.09.2013 14:26, schrieb Stefan Monnier:
> > So in essence Emacs doesn't really have local dynamic variables?
>
> Dynamic scoping is inherently global,

Reads like a mistake for me.

What about saying scope and art-of-binding are unrelated?

Please consider the following

(defvar a nil)
(setq a 2)

(defun foo (&optional a)
  (let ((a (or a 0)))
    (message "%d" a)
  (bar)))

(defun bar ()
  (setq a 1))

(foo)->
0
1

;; setq a 1 worked, because of dynamic binding at a local var

a->
2

Global a is not affected, because of the let-binding, which is obviously not 
global.