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Re: rx.el sexp regexp syntax
From: |
Eric Abrahamsen |
Subject: |
Re: rx.el sexp regexp syntax |
Date: |
Fri, 25 May 2018 11:01:50 -0700 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) |
Pierre Neidhardt <address@hidden> writes:
> Alan Mackenzie <address@hidden> writes:
>
>>> rx.el is one of the best concepts I've discovered in a long time.
>>> It's another instance of "Don't come up with a new (mini)language when
>>> Lisp can do better": it's easier to learn, more flexible, easier to
>>> write, much easier to read and as a consequence much more maintainable.
>>
>> Much easier than what? Than the putative mini-language that doesn't get
>> written?
>
> I meant that in my opinion rx is easier to write than regexps. That it
> is not popular is the root of the question here.
Slightly off-topic: I wouldn't ever use rx unless I was writing a really
brutal regexp, but what I *would* use all day long would be a macro that
un-escaped backslashes for me. Ideally:
(string-match (rx-unescape "turn (left|right)") "turn right") => 0
But even this would be an improvement:
(string-match (rx-unescape "turn \(left\|right\)") "turn right") => 0
I looked in the repos, but didn't see any packages that do this.
As an aside, this thread led me to find the rx pcase matcher, something
I'd daydreamed about before, so I'm already pretty happy :)
Eric
- rx.el sexp regexp syntax (WAS: Off Topic), Noam Postavsky, 2018/05/24
- Re: rx.el sexp regexp syntax (WAS: Off Topic), Van L, 2018/05/24
- Re: rx.el sexp regexp syntax (WAS: Off Topic), Richard Stallman, 2018/05/24
- Re: rx.el sexp regexp syntax (WAS: Off Topic), Pierre Neidhardt, 2018/05/25
- Re: rx.el sexp regexp syntax (WAS: Off Topic), Alan Mackenzie, 2018/05/25
- Re: rx.el sexp regexp syntax (WAS: Off Topic), Pierre Neidhardt, 2018/05/25
- Re: rx.el sexp regexp syntax,
Eric Abrahamsen <=
- Re: rx.el sexp regexp syntax, Pierre Neidhardt, 2018/05/25
- Re: rx.el sexp regexp syntax, Eric Abrahamsen, 2018/05/25
- Re: rx.el sexp regexp syntax, Clément Pit-Claudel, 2018/05/25
- Re: rx.el sexp regexp syntax, Eric Abrahamsen, 2018/05/25
- Re: rx.el sexp regexp syntax, Michael Heerdegen, 2018/05/25
- Re: rx.el sexp regexp syntax, Eric Abrahamsen, 2018/05/25
- Re: rx.el sexp regexp syntax, Stefan Monnier, 2018/05/27
- Re: rx.el sexp regexp syntax, Pierre Neidhardt, 2018/05/28
- Re: rx.el sexp regexp syntax, Stefan Monnier, 2018/05/28
- Re: rx.el sexp regexp syntax, Richard Stallman, 2018/05/28