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bug#47992: [External] : bug#47992: 27; 28; Phase out use of `equal` in `
From: |
Drew Adams |
Subject: |
bug#47992: [External] : bug#47992: 27; 28; Phase out use of `equal` in `add-hook`, `remove-hook` |
Date: |
Sun, 25 Apr 2021 04:57:35 +0000 |
>> > > you'd make it no longer work at all for
>> > > interpreted lambda forms (except rare cases where they
>> > > might actually be `eq' - e.g., same list structure)?
>> >
>> > It would still work for lambda forms, just differently (arguably,
>> > in a way that's more often right than the current way).
> >
> > Please elaborate. Comparing lambda forms using `eq'?
> > Not clear to me how that works in the general case.
> >
> > (eq (lambda () foo) (lambda () foo)) ?
> >
> > I don't see that it works at all, let alone works more
> > often than the current way:
> > (equal (lambda () foo) (lambda () foo))
>
> IOW, you don't have an opinion either way on the
> proposed change of semantics.
Seems to be your favorite way of (not) communicating:
saying that I have nothing to say.
How about actually elaborating: Tell us how using
`eq' would enable the interpreter to test equality
of lambda forms in the general case (not shared list
structure)?
How would using `eq' "still work for lambda forms,
just differently (arguably, in a way that's more
often right than the current way)"? Forgive me for
not understanding what you mean by that.
___
As for my opinion on the proposed change: I haven't
seen a good argument for using `eq' instead of `equal'
to test for equality in `add|remove-hook' (in the code:
`memq' instead of `member').
I gave good arguments for continuing to use `equal'.
Emacs users use the Elisp interpreter interactively,
and they do use lambda forms with `add|remove-hook',
even though that's not a great idea. `eq' doesn't
cut the mustard at all, for such use.
Barring a good argument for using `eq', I'm not in
favor of such a change. Given a good argument, I
might change my mind. Clear enough?
- bug#47992: [External] : bug#47992: 27; 28; Phase out use of `equal` in `add-hook`, `remove-hook`, (continued)
- bug#47992: [External] : bug#47992: 27; 28; Phase out use of `equal` in `add-hook`, `remove-hook`, Daniel Mendler, 2021/04/24
- bug#47992: [External] : bug#47992: 27; 28; Phase out use of `equal` in `add-hook`, `remove-hook`, Stefan Monnier, 2021/04/24
- bug#47992: [External] : bug#47992: 27; 28; Phase out use of `equal` in `add-hook`, `remove-hook`, Daniel Mendler, 2021/04/24
- bug#47992: [External] : bug#47992: 27; 28; Phase out use of `equal` in `add-hook`, `remove-hook`, Drew Adams, 2021/04/24
- bug#47992: [External] : bug#47992: 27; 28; Phase out use of `equal` in `add-hook`, `remove-hook`, Stefan Monnier, 2021/04/24
- bug#47992: [External] : bug#47992: 27; 28; Phase out use of `equal` in `add-hook`, `remove-hook`, Drew Adams, 2021/04/25
- bug#47992: [External] : bug#47992: 27; 28; Phase out use of `equal` in `add-hook`, `remove-hook`, Stefan Monnier, 2021/04/25
- bug#47992: [External] : bug#47992: 27; 28; Phase out use of `equal` in `add-hook`, `remove-hook`, Drew Adams, 2021/04/24
- bug#47992: [External] : bug#47992: 27; 28; Phase out use of `equal` in `add-hook`, `remove-hook`, Drew Adams, 2021/04/24
- bug#47992: [External] : bug#47992: 27; 28; Phase out use of `equal` in `add-hook`, `remove-hook`, Stefan Monnier, 2021/04/24
- bug#47992: [External] : bug#47992: 27; 28; Phase out use of `equal` in `add-hook`, `remove-hook`,
Drew Adams <=
- bug#47992: [External] : bug#47992: 27; 28; Phase out use of `equal` in `add-hook`, `remove-hook`, Daniel Mendler, 2021/04/25
- bug#47992: [External] : bug#47992: 27; 28; Phase out use of `equal` in `add-hook`, `remove-hook`, Stefan Monnier, 2021/04/25