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I am searching in a buffer for a regular expression by this snippet:

(setq jb-revision-version "\\([[:digit:]]+\\.?\\)")
(setq jb-revision-string "\\(\\(Revision\\|Id\\): +\\)")
(progn
  (save-excursion
    (goto-char (point-min))
    (setq start (re-search-forward jb-revision-string)
      end (re-search-forward (concat jb-revision-version "+")))
    (setq version (buffer-substring start end))))

The result in variable version is this:

version
#("0.1.2" 0 5 (face font-lock-comment-face fontified nil))

What I want, is the pure string "0.1.2" in this case.

Even if I insert (font-lock-mode -1) ... (font-lock-mode 1) in my above code, the result still contains some font-lock-info:

#("0.1.2" 0 5 (fontified nil))

I haven't found any font-lock-to-string function, to get rid of that stuff. Neither did I find a command, to temporarily defontify the buffer before searching.

I haven't found any hints in the Emacs, Emacs-Lisp or the Lisp-Introduction Info manuals.

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  • 1
    does it work to use buffer-substring-no-properties? the description for the buffer-substring function says it returns text properties as well as the characters. – shoshin Dec 30 '19 at 15:48
  • @shoshin YES! Would you please write it as answer, that I can mark this question solved and give you the credit you deserve? – Jan Dec 30 '19 at 15:51
2

You'll want to use the function buffer-substring-no-properties. In the documentation for M-x describe-function buffer-substring it says this:

This function copies the text properties of that part of the buffer into the result string; if you don’t want the text properties, use buffer-substring-no-properties instead.

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