> I need to make a table factory function in emacs with cl extension.
> but I'm scheme user. I'm confusing emacs lisp behavior.
> will you please tell me the emacs lisp's free variable issue.

> my table factory function is following code:
>  (defun mk-table-instance ()
>   (let ((table nil)) ;; create a lexical value `table`
>     (defun __temp__ (msg &rest value)
>       ;; some operation changes the lexical variable `table`
>       (case msg
>    ((push) (push (car value) table))
>    (otherwise table)))
>     (function __temp__)))
> ;; return the `__temp__`  procedure with the lexical variable `table`
> ;; i.e. return a closure.

> (fset 'table-object (mk-table-instance))
> ;; 'table-object is an unique procedure object.
> (table-object 'push 13)
> ;; my plan => operate an unique `table` variable which was created by
> involving `mk-table-instance`
> ;; real        => "Debugger entered--Lisp error: (void-variable
> table)"!!!!!!!

> I researched this code. I guess the lexical binded variable `table` in
> `mk-table-instance` procedure refer to the global environment.
> In scheme, the variable refer to the lexical environment.

> How to refer to a lexical environment?

> > Hello,

> > I need to make a table factory function in emacs with cl extension.
> > but I'm scheme user. I'm confusing emacs lisp behavior.
> > will you please tell me the emacs lisp's free variable issue.

> > my table factory function is following code:
> >  (defun mk-table-instance ()
> >   (let ((table nil)) ;; create a lexical value `table`
> >     (defun __temp__ (msg &rest value)
> >       ;; some operation changes the lexical variable `table`
> >       (case msg
> >    ((push) (push (car value) table))
> >    (otherwise table)))
> >     (function __temp__)))
> > ;; return the `__temp__`  procedure with the lexical variable `table`
> > ;; i.e. return a closure.

> > (fset 'table-object (mk-table-instance))
> > ;; 'table-object is an unique procedure object.
> > (table-object 'push 13)
> > ;; my plan => operate an unique `table` variable which was created by
> > involving `mk-table-instance`
> > ;; real        => "Debugger entered--Lisp error: (void-variable
> > table)"!!!!!!!

> > I researched this code. I guess the lexical binded variable `table` in
> > `mk-table-instance` procedure refer to the global environment.
> > In scheme, the variable refer to the lexical environment.

> > How to refer to a lexical environment?

> Emacs Lisp implements dynamic scoping, not lexical scoping.

> You can use lexical-let to emulate lexical binding.

> --
> Barry Margolin, bar...@alum.mit.edu
> Arlington, MA
> *** PLEASE post questions in newsgroups, not directly to me ***
> *** PLEASE don't copy me on replies, I'll read them in the group ***