Re: regex module has dropped support for syntax tables

[Paul Eggert]

On 5/9/22 14:03, Reuben Thomas wrote:
> On Mon, 9 May 2022 at 20:29, Paul Eggert <eggert@cs.ucla.edu> wrote:
>
> > On 5/8/22 15:54, Reuben Thomas wrote:
> >
> > > I sympathise if the gnulib maintainers don't want to reintroduce them; in
> > > that case, could their removal please be flagged up in the docs?
> >
> > Sure, I installed the attached.
>
> Thanks! I didn't think of this before, is regex.texi supposed to document
> GNU regex, then? 

Oh my. For years I thought that gnulib/doc/regex.texi documents the 
regular expressions supported by glibc (and by Gnulib, which mimics 
glibc). Unfortunately it appears that I am wrong, and it's documentation 
for the old GNU regex package (however, with some edits by me that are 
appropriate only for glibc!).

Does anybody use gnulib/doc/regex.texi? If not, I suggest we remove it 
from Gnulib. It's not part of any package, and its presence is confusing 
both Rueben and me.



> Failing that, you could also try GNU Emacs's regex implementation, which
> > is derived from GNU regex 0.12, and which may have fewer bugs than regex
> > 0.12.
>
>
> That's a good suggestion I hadn't thought of, thanks. I had a look at Emacs
> git, and it seems to use glibc regex, though?

It has two copies of the regex code, one from Gnulib (which is what you 
probably saw) and one just for Emacs. I meant the latter. It's in 
emacs/src/regex-emacs.[ch].