Subject: bug#46374: 28.0.50; Ask me to save buffers only if they are under callers dir

From: Eli Zaretskii <[email-masked]>
Date: Thu, 29 Apr 2021 12:16:27 +0300

> From: Tino Calancha <[email-masked]>
> Date: Wed, 28 Apr 2021 21:31:25 +0200
> Cc: [email-masked], Stefan Monnier <[email-masked]>,
>  Quách Mỹ Uyên Nhi
>  <[email-masked]>
> 
> Juri Linkov <[email-masked]> writes:
> 
> +(defcustom save-some-buffers-default-predicate save-some-buffers-default-fun
> +  "Generator function of the default predicate for `save-some-buffers'.
> +
> +It must be a function with no arguments that returns a predicate.
> +This predicate is called (with no parameters) from the buffer to be
> +saved.

Reading this, I'm confused: a function that returns a predicate?  If
this is literally so, why do we need this two-step approach? why not
have the value _be_ a predicate function?