bug#4102: 23.1.50; recentf-mode nil but toggles

[Xah Lee]

> > With prefix argument arg, turn on if positive, otherwise off.
>
> It's not clear whether nil is positive or negative.

Thanks. That's interesting.

Can the doc adds a warning like:

The argument should be a integer. Do not use t or nil.

?

 Xah
∑ http://xahlee.org/

☄

----- Original Message ----- 
From: "Stefan Monnier" <monnier@iro.umontreal.ca>
To: "Xah Lee" <xah@xahlee.org>
Cc: <4102@emacsbugs.donarmstrong.com>; <bug-gnu-emacs@gnu.org>
Sent: Monday, August 10, 2009 9:40 AM
Subject: Re: bug#4102: 23.1.50; recentf-mode nil but toggles


> > in my elisp code, i have:
> > (recentf-mode nil)
> > this should turn it off, but actually it toggles.
>
> That's indeed the standard behavior for all minor modes.  Use integers
> to avoid such surprises.
>
> > With prefix argument arg, turn on if positive, otherwise off.
>
> It's not clear whether nil is positive or negative.