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Re: Meaning of \C-? in bracket regular expression


From: Michael Heerdegen
Subject: Re: Meaning of \C-? in bracket regular expression
Date: Mon, 28 Sep 2015 02:11:04 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.0.50 (gnu/linux)

Joe Riel <joer@san.rr.com> writes:

>  "[^\C-?}]"

(info "(elisp) Ctl-Char Syntax") says that

  For historical reasons, Emacs treats the <DEL> character as the
  control equivalent of ‘?’:

       ?\^? ⇒ 127     ?\C-? ⇒ 127

Try (string-to-vector "[^\C-?}]").

So this is a question of string read syntax - there is no character "-"
in this string representing a regexp.


Michael.




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