Re: Debugger entered--Lisp error: (excessive-lisp-nesting)

[uzibalqa <uzibalqa@proton.me>]

------- Original Message -------
On Thursday, June 8th, 2023 at 8:50 PM, Platon Pronko <platon7pronko@gmail.com> wrote:


> On 2023-06-08 15:07, uzibalqa wrote:
> 
> > I am getting the following debugger information but have been unable to locate the problem.
> > 
> > What can I do ?
> > 
> > Debugger entered--Lisp error: (excessive-lisp-nesting)
> > (cond ((eq arg 'toggle) (not tematika-minor-mode)) ((and (numberp arg) (< arg 1)) nil) (t t))
> > (setq tematika-minor-mode (cond ((eq arg 'toggle) (not tematika-minor-mode)) ((and (numberp arg) (< arg 1)) nil) (t t)))
> > (let ((last-message (current-message))) (setq tematika-minor-mode (cond ((eq arg 'toggle) (not tematika-minor-mode)) ((and (numberp arg) (< arg 1)) nil) (t t))) (if (boundp 'local-minor-modes) (progn (setq local-minor-modes (delq 'tematika-minor-mode local-minor-modes)) (if tematika-minor-mode (progn (setq local-minor-modes (cons 'tematika-minor-mode local-minor-modes)))))) (if tematika-minor-mode (progn (tematika-tools) (tematika-addhooks-woutline) (tematika-activate-woutline) (message "Tematika Activated")) (tematika-activate-woutline) (message "Tematika Deactivated")) (run-hooks 'tematika-minor-mode-hook (if tematika-minor-mode 'tematika-minor-mode-on-hook 'tematika-minor-mode-off-hook)) (if (called-interactively-p 'any) (progn nil (if (and (current-message) (not (equal last-message (current-message)))) nil (let ((local " in current buffer")) (message "Tematika minor mode %sabled%s" (if tematika-minor-mode "en" "dis") local))))))
> > tematika-minor-mode(0)
> > tematika-activate-woutline()
> > (if tematika-minor-mode (progn (tematika-tools) (tematika-addhooks-woutline) (tematika-activate-woutline) (message "Tematika Activated")) (tematika-activate-woutline) (message "Tematika Deactivated"))
> > (let ((last-message (current-message))) (setq tematika-minor-mode (cond ((eq arg 'toggle) (not tematika-minor-mode)) ((and (numberp arg) (< arg 1)) nil) (t t))) (if (boundp 'local-minor-modes) (progn (setq local-minor-modes (delq 'tematika-minor-mode local-minor-modes)) (if tematika-minor-mode (progn (setq local-minor-modes (cons 'tematika-minor-mode local-minor-modes)))))) (if tematika-minor-mode (progn (tematika-tools) (tematika-addhooks-woutline) (tematika-activate-woutline) (message "Tematika Activated")) (tematika-activate-woutline) (message "Tematika Deactivated")) (run-hooks 'tematika-minor-mode-hook (if tematika-minor-mode 'tematika-minor-mode-on-hook 'tematika-minor-mode-off-hook)) (if (called-interactively-p 'any) (progn nil (if (and (current-message) (not (equal last-message (current-message)))) nil (let ((local " in current buffer")) (message "Tematika minor mode %sabled%s" (if tematika-minor-mode "en" "dis") local))))))
> > tematika-minor-mode(0)
> 
> 
> Looks like you are reaching the recursion limit. Looking at the debugger trace it seems that (tematika-minor-mode) invokes (tematika-minor-mode), which causes infinite recursion. - Platon Pronko


Absolutely right.  Have written a minor mode that provides some customisations to outline-minor-mode.
Would like that when tematika-minor-mode is activated, outline-minor-mode gets enabled automatically. 

I have the following.  The problem happened because I was calling (tematika-activation) within the
definition of tematika-minor-mode, as soon as tematika-minor-mode gets activated.

Would you be so kind to show me how I can enable outline-minor-mode when the user enables
tematika-minor-mode so as to avoid the infinite recursion problem ?

I also need a way to disable outline-minor-mode when tematika-minor-mode is disabled.

(defun tematika-activation ()
  "Activate `tematika-minor-mode' with `outline-minor-mode' in a
buffer-local way."
  (tematika-minor-mode (if outline-minor-mode 1 0)))

;;;###autoload
(define-minor-mode tematika-minor-mode
  "Enhances visibility of heading levels and text emphasis."
  :init-value nil
  :lighter " Tematika"

  (if tematika-minor-mode

      ;; Enable minor mode capability
      (progn (tematika-tools)
             (tematika-hooks-outl)
             ;; (tematika-activation)
             (message "Tematika Activated"))

    ;; [ELSE] Revert the functionality provided by minor mode
    ;; (tematika-activate-woutline)
    (message "Tematika Deactivated")) )