Re: Changing buffer-local variables to cycle emacs options

[Yuri Khan]

On Tue, 29 Dec 2020 at 12:14, <steve-humphreys@gmx.com> wrote:
>
> I am getting the following Lisp error
>
> Debugger entered--Lisp error: (void-variable gstate)

> I am using the function below.  The problem occurs when I comment out
> "(defvar gstate 0)".  When I introduce the variable, the Lisp Error is
> not reported.
>
> One confusion that exists is that I want gstate buffer-local.  But I think
> that using defvar is a mistake.  Another think is to avoid defining gstate
> before calling the function.  My plan was to have "pcase" do to the "(_"
> part if the buffer-local variable "gstate" is not defined, and then define
> it using "(setq-local gstate 1)".

Defining your variables before use is the right way.

If you know you always want a variable to be buffer-local, you can use
(defvar-local gstate 0).