Subject: Re: bug#73098: setopt float warning unexpected

From: Eli Zaretskii <[email-masked]>
Date: Sun, 08 Sep 2024 09:06:56 +0300

> From: Ship Mints <[email-masked]>
> Date: Sat, 7 Sep 2024 09:14:54 -0400
> 
> This one bit me yesterday on Emacs 29.3 as I was revising my init file (for the thousandth time this week).
> 
> As setopt becomes more widely recommended, people will likely encounter situations like the below where they
> expect constant numeric types to be coerced. 
> 
> (defcustom temp-float "Float"
>   "Float type."
>   :type 'float)
> 
> (setopt temp-float 2.0) ; works
> (setopt temp-float 2) ; Warning (emacs): Value '2' does not match type float

If you are going to allow integer values, shouldn't :type be 'number,
not 'float?  The documentation of 'float says:

  ‘float’
       The value must be floating point.

"Must be floating point."  The value 2 isn't.