From: Michael Heerdegen <michael_heerdegen@web.de>
To: 50136@debbugs.gnu.org
Cc: "Mattias Engdegård" <mattiase@acm.org>,
"Stefan Monnier" <monnier@iro.umontreal.ca>
Subject: bug#50136: 28.0.50; A problem with rx-let expansion
Date: Fri, 20 Aug 2021 16:50:01 +0200 [thread overview]
Message-ID: <8735r4jhly.fsf@web.de> (raw)
In-Reply-To: <878s0wcj3j.fsf@web.de> (Michael Heerdegen's message of "Fri, 20 Aug 2021 15:59:44 +0200")
Michael Heerdegen <michael_heerdegen@web.de> writes:
> #+begin_src emacs-lisp
> (rx-let ((scatter (s) (regex (mapconcat #'string (string-to-list s) ".*"))))
> (rx (scatter "abc"))) ==> "a.*b.*c"
> #+end_src
AFAIU, the current approach doesn't allow to extend this with an
optional CHARS argument to specify with chars are allowed "in between"
(instead of "any"). The "&optional" keyword makes it barf.
And I can't actually "look" at the arguments to provide a conditional
replacement. All I can do is to use `regex' to eval a constant
expression I specify (at run-time). This seems a quite limiting
approach. Something more macro-like would be appropriate IMO.
Michael.
next prev parent reply other threads:[~2021-08-20 14:50 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-20 13:59 bug#50136: 28.0.50; A problem with rx-let expansion Michael Heerdegen
2021-08-20 14:50 ` Michael Heerdegen [this message]
2021-08-20 15:23 ` Mattias Engdegård
2021-08-20 17:21 ` Michael Heerdegen
2021-08-20 18:45 ` Mattias Engdegård
2021-08-21 11:45 ` Michael Heerdegen
2021-08-21 13:02 ` Mattias Engdegård
2021-08-23 10:45 ` Michael Heerdegen
2021-08-23 12:38 ` Mattias Engdegård
2021-08-23 15:20 ` Mattias Engdegård
2021-08-23 16:59 ` Michael Heerdegen
2021-08-23 18:05 ` Mattias Engdegård
2021-08-21 3:21 ` Richard Stallman
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