Re: Native line numbers landed on master

[Eli Zaretskii]

> From: Robert Pluim <address@hidden>
> Cc: address@hidden
> Date: Wed, 09 Oct 2019 14:14:48 +0200
> 
> >>>>> On Wed, 09 Oct 2019 11:16:36 +0300, Eli Zaretskii <address@hidden> said:
>     >> Iʼve done my best, although I donʼt see where init_buffer_once comes
>     >> in.
> 
>     Eli> I meant the likes of this:
> 
>     Eli>   XSETFASTINT (BVAR (&buffer_local_flags, tab_width), idx); ++idx;
> 
>     Eli> Anyone who defines buffer-local variables should generally be 
> familiar
>     Eli> with this stuff.
> 
> Thatʼs for variables defined with DEFVAR_PER_BUFFER

Yes.

> Do people add those often enough that we need to document it?

I don't know, but it's a kind of black magic that if you don't know
about, you are in a lot of trouble when you need to add such a
variable.

> * doc/lispref/internals.texi (Writing Emacs Primitives): Add
> description of DEFVAR_* arguments.  Describe variable naming
> conventions.  Explain how to express quoting of symbols in C, plus
> 'specbind' and how to create buffer-local variables.

LGTM, thanks.