Using variables to set defaults to parameters

Using variables to set defaults to parameters

[goncholden via Users list for the GNU Emacs text editor]

I am currently defining a minor-mode with default parameters, but want to pass defaulted variables
instead. What is the way to do this, using setq ?

(define-minor-mode rich-minor-mode
"Brief description" nil "" nil

then changed to

(setq initval nil)
(setq mdline-indic "")
(setq other nil)

(define-minor-mode rich-minor-mode
"Brief description" initval mdline-indic other

Re: Using variables to set defaults to parameters

[Stefan Monnier via Users list for the GNU Emacs text editor]

> I am currently defining a minor-mode with default parameters, but want
> to pass defaulted variables instead.  What is the way to do this,
> using setq ?
>
> (define-minor-mode rich-minor-mode
> "Brief description" nil "" nil

Don't use this long obsolete form.  Use the keyword arguments, instead:

    (define-minor-mode rich-minor-mode
      "Brief description"
      :lighter "")

> then changed to
>
> (setq initval nil)
> (setq mdline-indic "")
> (setq other nil)

I don't know what you mean with "then changed" nor where the above code
is intended to be placed (inside the `define-minor-mode`?  In some
other function?).


        Stefan

Using variables to set defaults to parameters

[goncholden]

------- Original Message -------

On Thursday, February 3rd, 2022 at 4:24 PM, Stefan Monnier via Users list for the GNU Emacs text editor <help-gnu-emacs@gnu.org> wrote:

> I am currently defining a minor-mode with default parameters, but want
>
> to pass defaulted variables instead. What is the way to do this,
>
> using setq ?
>
> (define-minor-mode rich-minor-mode
>
> "Brief description" nil "" nil

Don't use this long obsolete form. Use the keyword arguments, instead:

(define-minor-mode rich-minor-mode

"Brief description"

:lighter "")

> then changed to
>
> (setq initval nil)
>
> (setq mdline-indic "")
>
> (setq other nil)

I don't know what you mean with "then changed" nor where the above code
is intended to be placed (inside the `define-minor-mode`? In some
other function?).

Stefan

Have been trying to pass the parameters with names that mean something, rather than
using

(define-minor-mode rich-minor-mode "Brief description" nil "" nil

so I would have

(define-minor-mode rich-minor-mode "Brief description" initval mdline-indic other

Where can I find some information on using the keyword arguments? I only know about the
long obsolete form.

Re: Using variables to set defaults to parameters

[goncholden]

------- Original Message -------

On Thursday, February 3rd, 2022 at 6:20 PM, goncholden <goncholden@protonmail.com> wrote:

> ------- Original Message -------
>
> On Thursday, February 3rd, 2022 at 4:24 PM, Stefan Monnier via Users list for the GNU Emacs text editor help-gnu-emacs@gnu.org wrote:
>
> > I am currently defining a minor-mode with default parameters, but want
> >
> > to pass defaulted variables instead. What is the way to do this,
> >
> > using setq ?
> >
> > (define-minor-mode rich-minor-mode
> >
> > "Brief description" nil "" nil
>
> Don't use this long obsolete form. Use the keyword arguments, instead:
>
> (define-minor-mode rich-minor-mode
>
> "Brief description"
>
> :lighter "")
>
> > then changed to
> >
> > (setq initval nil)
> >
> > (setq mdline-indic "")
> >
> > (setq other nil)
>
> I don't know what you mean with "then changed" nor where the above code
>
> is intended to be placed (inside the `define-minor-mode`? In some
>
> other function?).
>
> Stefan
>
> Have been trying to pass the parameters with names that mean something, rather than
>
> using
>
> (define-minor-mode rich-minor-mode "Brief description" nil "" nil
>
> so I would have

> (define-minor-mode rich-minor-mode "Brief description" initval mdline-indic other

> Where can I find some information on using the keyword arguments? I only know about the
> long obsolete form.

What's the best thing to make code more readable?  Keywords as you say?  I do not want modeline
indicator for this.  I do not particularly understand initial values, how do they work?