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Re: Ugly regexps

From: Stefan Monnier
Subject: Re: Ugly regexps
Date: Wed, 03 Mar 2021 10:46:20 -0500
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux)

>> So you can do
>>     (string-match (ere "\\(def(macro|un|subst) .{1,}"))
>> instead of
>>     (string-match "(def\\(macro\\|un\\|subst\\) .\\{1,\\}")
> Why not use 'rx' in those cases?

Not sure what you mean by "those cases".  I'm thinking this `ere` would
be useful for the cases where the author finds `rx` unpalatable for
some reason.

> IMO it makes the regexp even more easy to write and read.

I believe this depends on taste and circumstances.  Experience shows
that while some packages use `rx` extensively, most ELisp code doesn't.


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