bug#32643: 26; minor-mode variables

["Andreas Röhler" <andreas.roehler@easy-emacs.de>]

On 09.09.2018 16:12, Drew Adams wrote:
>>    > Applying common sense, the obvious explanation is that auto-fill-mode
>>    > controls only a single variable (i.e., `auto-fill-function'), and adding
>>    > an extra `auto-fill-mode' which would then have to be kept in sync just
>>    > to conform to some convention is not worth the trouble.
>>
>> We could arrange for Auto-Fill mode to be controlled by a variable
>> auto-fill-mode.  Change the auto-fill code so that two variables
>> control it: (and auto-fill-mode auto-fill-function (funcall
>> auto-fill-function ...)).  Then we could leave auto-fill-function set
>> up all the time, and enable/disable the mode by setting auto-fill-mode
>> as with most other minor modes.
> 
> I do hope that someone does something, perhaps along those lines,
> to provide an `auto-fill-mode' variable.
> 
> As I said, I'm not familiar with the `:variable' stuff. I'd think that using
> `:set' would be sufficient, to ensure that both variables are updated
> correctly whenever `auto-fill-mode' is set. But perhaps that would
> not suffice to ensure that whenever `auto-fill-function' is set.
> 
> (A guess is that using `:variable' provides a simpler or more elegant
> way of doing what could be done using `:set'.)
> 
> 
> 

Maybe that can be done by defmacro define-minor-mode already - no need 
for hand-writing?