On Wed, Apr 19, 2017 at 10:44 AM Eli Zaretskii <
eliz@gnu.org> wrote:
> From: Kaushal Modi <kaushal.modi@gmail.com>
> Date: Wed, 19 Apr 2017 12:38:52 +0000
> Cc: Clément Pit-Claudel <cpitclaudel@gmail.com>,
> Emacs developers <emacs-devel@gnu.org>, yuri.v.khan@gmail.com
>
> I learnt recently that foo-p naming convention is only for predicate
> functions that return nil or non-nil.
We have several dozen of variables in Emacs whose names end in "-p".
It's just a convention, and it makes sense so I suggested that.
I ran ag in emacs/lisp:
1. 1511 matches -- defuns and defsubsts ending in -p -- ag 'def(un|subst)\s+[^ ]+-p\s+' --stats
2. 149 matches -- defvars, defconsts and defcustoms ending in -p -- ag 'def(var|const|custom)\s+[^ ]+-p\s+' --stats
3. 65 matches -- Just the user-facing defcustoms -- ag 'defcustom\s+[^ ]+-p\s+' --stats
So it is correct that there are dozens of variables that end in -p, but it's a stronger convention to have -p in functions.