Hi all,

I am working on basic navigation for sh-mode. My idea is that in sh-mode
invoking C-M-a or C-M-e moves point to the beginning/end of the
surrounding function if the point was inside of said function or to the
beginning/end of the next/previous top-level function otherwise.

I got the functions to do so in the attached patch (I did not include the
C-M-a with a negative argument yet).

If the functions are defined and used in isolation they work as intended.
However, because `end-of-defun' calls `beginning-of-defun-raw' (which,
AFAIK, uses `beginning-of-defun-function') it causes the C-M-e to not work
when the point is not inside of a function.

What I think is happening is that, when `end-of-defun' calls
`beginning-of-defun-raw' it brings point to the beginning of a top-level
function, so the subsequent call to `end-of-defun' moves point to the start
location, does it make it seems as the point did not move.

I have also noticed that calling the private function I defined directly
via M-: brings the point to a slightly different location. For example:

<---- point before C-M-e
A {
} <--- point after M-: (sh-mode--treesit-end-of-defun)
<---- pint after C-M-e

Calling sh-mode--treesit-end-of-defun brings the point right after the
closing curly brace and with C-M-e the point is positioned at the next line.

That might be due to additional processing done inside `end-of-defun'.

So, would it be ok to override `beginning-of-defun' and `end-of-defun' and
thus have bash-ts-mode use the functions I wrote directly? If so, how could
I do that? If not, how can I fix the "miss-behavior"?

I would appreciate all feedback and suggestions.

-- 
João Paulo L. de Carvalho
Ph.D Computer Science |  IC-UNICAMP | Campinas , SP - Brazil
Postdoctoral Research Fellow | University of Alberta | Edmonton, AB - Canada
joao.carvalho@ic.unicamp.br
joao.carvalho@ualberta.ca