Re: Automatic (e)tags generation and incremental updates

[Eli Zaretskii]

> Cc: philipk@posteo.net, tom@tromey.com, john@yates-sheets.org,
>  emacs-devel@gnu.org
> From: Dmitry Gutov <dgutov@yandex.ru>
> Date: Sat, 20 Feb 2021 23:14:15 +0200
> 
> On 20.02.2021 22:41, Eli Zaretskii wrote:
> > You said
> > the syntax of the --regexp option is different between these two
> > programs, so you must use the right syntax that fits the program being
> > invoked.
> 
> Perhaps you were referring to the fact that --regex-<LANG> in ctags is 
> more different than --regex in etags, not just because it puts LANG in 
> the flag name rather than inside the value.

Yes, that's what I meant.

> It also allows specifying regexp syntax, and defaults to extended RE.
> 
> That is indeed problematic, and not so trivial to implement in a 
> compatibility layer.

I thought that once this difficulty is solved, the others can easily
use the same solution.