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Make `font-lock-add-keywords' work in derived modes

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* lisp/font-lock.el (font-lock-set-defaults): Make
`font-lock-add-keywords' work in derived modes (bug#24176).
This commit is contained in:
Lars Ingebrigtsen
2022-01-24 11:55:57 +01:00
parent 806a121007
commit 77b72f77b3
1 changed files with 3 additions and 2 deletions
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5
lisp/font-lock.el
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@@ -1906,8 +1906,9 @@ preserve `hi-lock-mode' highlighting patterns."
Sets various variables using `font-lock-defaults' and
`font-lock-maximum-decoration'."
;; Set fontification defaults if not previously set for correct major mode.
(unless (and font-lock-set-defaults
(eq font-lock-major-mode major-mode))
(when (or (not font-lock-set-defaults)
(not font-lock-major-mode)
(not (derived-mode-p font-lock-major-mode)))
(setq font-lock-major-mode major-mode)
(setq font-lock-set-defaults t)
(let* ((defaults font-lock-defaults)