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Re: Scan of regexps in emacs

From: Paul Eggert
Subject: Re: Scan of regexps in emacs
Date: Sun, 10 Mar 2019 20:37:19 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.5.1

Clément Pit-Claudel wrote:
On 10/03/2019 22.45, Paul Eggert wrote:
-            (while (string-match (concat "\\(^" comint-prompt-regexp
+            (while (string-match (concat "\\(" comint-prompt-regexp
I think your change altered the meaning of that regexp.

Yes and no. Yes, it altered the meaning of the regexp, but no it should fix a bug rather than introduce one because comint-prompt-regexp in practice always seems to be anchored to a line start. For example, comint-prompt-regexp defaults to "^", which meant that the above code's entire regexp was this:


which is equivalent to this regexp:


which is not what was wanted.

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