outline-regexp) using ";; *+ " for elisp code

outline-regexp) using ";; *+ " for elisp code

[Christopher Dimech]

I am hoping to have headline levels using comment loni followed by stars.

I mould need some adaptation to get the regular expression right, becouse
";; *+ " does not do the job.

   (add-hook 'emacs-lisp-mode-hook #'outline-minor-mode)

   (add-hook 'emacs-lisp-mode-hook
	     (lambda ()
	       (set (make-local-variable 'outline-regexp) ";; *+ ")))

Re: outline-regexp) using ";; *+ " for elisp code

[Joost Kremers]

On Tue, May 11 2021, Christopher Dimech wrote:
> I am hoping to have headline levels using comment loni followed by stars.
>
> I mould need some adaptation to get the regular expression right, becouse
> ";; *+ " does not do the job.

* is special in regexes. You'll need to quote it.

-- 
Joost Kremers
Life has its moments

outline-regexp) using ";; *+ " for elisp code

[Christopher Dimech]

> Sent: Tuesday, May 11, 2021 at 7:05 PM
> From: "Joost Kremers" <joostkremers@fastmail.fm>
> To: "Christopher Dimech" <dimech@gmx.com>
> Cc: help-gnu-emacs@gnu.org
> Subject: Re: outline-regexp) using ";; *+ " for elisp code
>
>
> On Tue, May 11 2021, Christopher Dimech wrote:
> > I am hoping to have headline levels using comment loni followed by stars.
> >
> > I mould need some adaptation to get the regular expression right, becouse
> > ";; *+ " does not do the job.
>
> * is special in regexes. You'll need to quote it.

Thanks

";; \\*+ "

> --
> Joost Kremers
> Life has its moments
>

outline-regexp) using ";; *+ " for elisp code

[Christopher Dimech]

Have tried the following, but the regexp is not taking effect when I call
"Hide body".

In my elisp file I have used

;;; ** alpha-bounds

--------

   (add-hook 'emacs-lisp-mode-hook #'outline-minor-mode)

   ;; set regularity condition
   (setq rgc ";;; \\*+ ")
   ;;(setq rgc ";;; \\([A-Za-z]\\|[IVXLCDMivxlcdm0-9]+\\) | ")

   (add-hook 'emacs-lisp-mode-hook
	     (lambda ()
	       (set (make-local-variable 'outline-regexp) rgc)))

> Sent: Tuesday, May 11, 2021 at 7:05 PM
> From: "Joost Kremers" <joostkremers@fastmail.fm>
> To: "Christopher Dimech" <dimech@gmx.com>
> Cc: help-gnu-emacs@gnu.org
> Subject: Re: outline-regexp) using ";; *+ " for elisp code
>
>
> On Tue, May 11 2021, Christopher Dimech wrote:
> > I am hoping to have headline levels using comment loni followed by stars.
> >
> > I mould need some adaptation to get the regular expression right, becouse
> > ";; *+ " does not do the job.
>
> * is special in regexes. You'll need to quote it.
>
> --
> Joost Kremers
> Life has its moments
>

outline-regexp) using ";; *+ " for elisp code

[Christopher Dimech]

Any reason why using rgc does not work, whereas things are good when I use
the string directly in the call "make-local-variable"?

   (setq-local rgc ";;; \\*+ ")

   (add-hook 'emacs-lisp-mode-hook
	     (lambda ()
	       (set (make-local-variable 'outline-regexp) rgc)))




> Sent: Tuesday, May 11, 2021 at 7:05 PM
> From: "Joost Kremers" <joostkremers@fastmail.fm>
> To: "Christopher Dimech" <dimech@gmx.com>
> Cc: help-gnu-emacs@gnu.org
> Subject: Re: outline-regexp) using ";; *+ " for elisp code
>
>
> On Tue, May 11 2021, Christopher Dimech wrote:
> > I am hoping to have headline levels using comment loni followed by stars.
> >
> > I mould need some adaptation to get the regular expression right, becouse
> > ";; *+ " does not do the job.
>
> * is special in regexes. You'll need to quote it.
>
> --
> Joost Kremers
> Life has its moments
>

Re: outline-regexp) using ";; *+ " for elisp code

[Joost Kremers]

On Tue, May 11 2021, Christopher Dimech wrote:
> Any reason why using rgc does not work, whereas things are good when I use
> the string directly in the call "make-local-variable"?
>
>    (setq-local rgc ";;; \\*+ ")

Where is this call? =setq-local= sets the variable's value in the buffer in
which it is executed. If this call is in your init file, it's not going to have
any effect on your Emacs session.

In your init file, you'll want =defvar= or =defvar-local=. (Note, the =local= part
here does not have the same meaning as the =local= part in =setq-local=. See the
doc strings for details.)

-- 
Joost Kremers
Life has its moments

outline-regexp) using ";; *+ " for elisp code

[Christopher Dimech]

You are right, setq-local does not take effect.  How does defvar solve the problem?

   (setq-local rgc ";;; \\*+ ")

   (add-hook 'emacs-lisp-mode-hook
	     (lambda ()
	       (set (make-local-variable 'outline-regexp) rgc)))

> Sent: Tuesday, May 11, 2021 at 8:19 PM
> From: "Joost Kremers" <joostkremers@fastmail.fm>
> To: "Christopher Dimech" <dimech@gmx.com>
> Cc: help-gnu-emacs@gnu.org
> Subject: Re: outline-regexp) using ";; *+ " for elisp code
>
>
> On Tue, May 11 2021, Christopher Dimech wrote:
> > Any reason why using rgc does not work, whereas things are good when I use
> > the string directly in the call "make-local-variable"?
> >
> >    (setq-local rgc ";;; \\*+ ")
>
> Where is this call? =setq-local= sets the variable's value in the buffer in
> which it is executed. If this call is in your init file, it's not going to have
> any effect on your Emacs session.
>
> In your init file, you'll want =defvar= or =defvar-local=. (Note, the =local= part
> here does not have the same meaning as the =local= part in =setq-local=. See the
> doc strings for details.)
>
> --
> Joost Kremers
> Life has its moments
>

outline-regexp) using ";; *+ " for elisp code

[Christopher Dimech]

> Sent: Tuesday, May 11, 2021 at 8:19 PM
> From: "Joost Kremers" <joostkremers@fastmail.fm>
> To: "Christopher Dimech" <dimech@gmx.com>
> Cc: help-gnu-emacs@gnu.org
> Subject: Re: outline-regexp) using ";; *+ " for elisp code
>
>
> On Tue, May 11 2021, Christopher Dimech wrote:
> > Any reason why using rgc does not work, whereas things are good when I use
> > the string directly in the call "make-local-variable"?
> >
> >    (setq-local rgc ";;; \\*+ ")
>
> Where is this call? =setq-local= sets the variable's value in the buffer in
> which it is executed. If this call is in your init file, it's not going to have
> any effect on your Emacs session.
>
> In your init file, you'll want =defvar= or =defvar-local=. (Note, the =local= part
> here does not have the same meaning as the =local= part in =setq-local=. See the
> doc strings for details.)

defvar-local is buffer-local variable.  I would think that I could use defvar as
the setting rather than a buffer-local variable, as the value would be the same for
all elisp files.

Have also tried doing the same for texinfo files.  Though outline-miner-mode is not
taking effect.

(add-hook 'texinfo-mode-hook #'outline-minor-mode)

> --
> Joost Kremers
> Life has its moments
>

Re: outline-regexp) using ";; *+ " for elisp code

[Joost Kremers]

On Tue, May 11 2021, Christopher Dimech wrote:
> defvar-local is buffer-local variable. I would think that I could use defvar
> as the setting rather than a buffer-local variable, as the value would be the
> same for all elisp files.

=defvar= and =defvar-local= define global variables. The difference is that
variables defined with =defvar-local= become buffer-local whenever they are set
(with =setq=). But the value set with the =defvar-local= expression itself is
the default value, which is the value that applies in buffers that do not have
their own local value for said variable. (You can set a default value explicitly
with =setq-default=.)



-- 
Joost Kremers
Life has its moments

outline-regexp) using ";; *+ " for elisp code

[Christopher Dimech]

Hi Joost,

Could you assist with another capability.  I would like to use a keybinding
to cycle the folding of headers only.

"H-<left>"   fold
"H-<right>"  unfold

Regards
Christopher

> Sent: Tuesday, May 11, 2021 at 10:29 PM
> From: "Joost Kremers" <joostkremers@fastmail.fm>
> To: "Christopher Dimech" <dimech@gmx.com>
> Cc: help-gnu-emacs@gnu.org
> Subject: Re: outline-regexp) using ";; *+ " for elisp code
>
>
> On Tue, May 11 2021, Christopher Dimech wrote:
> > defvar-local is buffer-local variable. I would think that I could use defvar
> > as the setting rather than a buffer-local variable, as the value would be the
> > same for all elisp files.
>
> =defvar= and =defvar-local= define global variables. The difference is that
> variables defined with =defvar-local= become buffer-local whenever they are set
> (with =setq=). But the value set with the =defvar-local= expression itself is
> the default value, which is the value that applies in buffers that do not have
> their own local value for said variable. (You can set a default value explicitly
> with =setq-default=.)
>
>
>
> --
> Joost Kremers
> Life has its moments
>

Re: outline-regexp) using ";; *+ " for elisp code

[Jean Louis]

* Christopher Dimech <dimech@gmx.com> [2021-05-11 14:23]:
> Hi Joost,
> 
> Could you assist with another capability.  I would like to use a keybinding
> to cycle the folding of headers only.
> 
> "H-<left>"   fold
> "H-<right>"  unfold

Maybe functions outline-hide-subtree and outline-show-subtree

You better first define what you wish to fold or unfold.

Try those functions with M-: evaluation like 

When you are on heading you wish to fold:

M-: (outline-hide-subtree)

M-: (outline-show-subtree)

then if that is the right one, you will make the keys.

-- 
Jean

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