Re: Compilation warnings in mouse.el

[Dmitry Gutov]

On 07/13/2016 05:30 PM, Eli Zaretskii wrote:

> But if each defcustom has its :group, then the need for consistency is
> no longer a requirement, is it?

The need for consistency is always there when one is writing code.

> > Speaking of personal preference, however, I'd rather using the `mouse'
> > group didn't work, in the absence of a defgroup somewhere.
>
> If we can do something to that effect, I don't think I will object.

We could start with a warning in Emacs 26, and make it so in 28-ish, maybe.

> > How would removing a defcustom, or merely adding one, lead to a bug?
>
> Well, not bug, a compilation warning that suddenly appears out of
> nowhere for code that was there for a long time.

For new code, AFAIU. Not for code that has been there for a while.

> AFAIU, extant defcustoms could start causing warnings, given some
> changes in other defcustom's.  Am I mistaken?

I believe so.

> In short, I think having one defcustom depend on another is bad for
> maintenance.

It would be bad, if it were so. defcustom depend on defgroup.