Re: [ELPA] New package: xr

[Clément Pit-Claudel]

On 01/02/2019 09.09, Mattias Engdegård wrote:
> This is a proposal to add xr to ELPA.
> 
> The xr package is the inverse of rx: it transforms an Emacs regexp string 
> into rx form. Its purpose is to assist in migration to rx-style regexps, 
> something I think a lot more people should do, and help understanding 
> difficult regexps.
> 
> It is written to take all features and oddities in the Emacs regexp notation 
> into account. This includes undocumented parts, since such regexps are found 
> in actual code.
> 
> The package consists of a single file, right now at 
> https://github.com/mattiase/xr . It is something I have had lying around for 
> some time and found constantly useful, and have now had the opportunity to 
> give some polish.

Looks great. Here's a feature request: can you combine this with a font-lock 
rule to display existing regexps in rx syntax?  Something like 
prettify-symbols-mode, but for regular expressions.

Clément.