Re: modern regexes in emacs

[Stefan Monnier]

> This would be really trivial to do when we'll have a function that
> will convert an extended regexp string into rx form like what
> the xr package does, i.e. like the function ‘xr’, a new function
> ‘exr’ could convert an extended regexp - as opposed to basic regexp
> as noted in https://www.regular-expressions.info/gnu.html

FWIW, lex.el's lex-parse-re supports both ERE and BRE syntaxes.
It's more a "proof of concept" for lex.el so it's currently not as
thorough as xr.el is.


        Stefan