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From: JD Smith <jdtsmith@gmail.com>
To: 65105@debbugs.gnu.org
Subject: bug#65105: Reusing the same string as 'display on consecutive characters evades display
Date: Sat, 5 Aug 2023 14:35:23 -0400	[thread overview]
Message-ID: <E5E1439B-082D-4A65-8F0C-E3BA4026BE26@gmail.com> (raw)

Evaluate:

(let ((s1 "test1")
      (s2 "test2"))
  (insert "\n"
          (propertize " " 'display s1)
          (propertize " " 'display s1)
          (propertize " " 'display s2)
          (propertize " " 'display s1)))


The first space display does not take effect, since the s1 string is used for two consecutive characters.  This has a practical impact for font-lock backends that use the ‘display text-property and would like to minimize string allocation.  

Tested Emacs 27/28/29.






             reply	other threads:[~2023-08-05 18:35 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-08-05 18:35 JD Smith [this message]
2023-08-05 19:03 ` bug#65105: Reusing the same string as 'display on consecutive characters evades display Eli Zaretskii
2023-08-05 20:49   ` JD Smith
2023-08-05 22:46     ` Dmitry Gutov
2023-08-05 22:49       ` JD Smith
2023-08-06  4:55         ` Eli Zaretskii
2023-08-06  4:54       ` Eli Zaretskii
2023-08-06 17:48         ` Dmitry Gutov

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