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envelope-from=stephen.berman@gmx.net; helo=mout.gmx.net X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.help:147719 Archived-At: On Fri, 16 Aug 2024 15:21:12 +0000 Heime wrot= e: > On Saturday, August 17th, 2024 at 3:16 AM, Stephen Berman > wrote: > >> On Fri, 16 Aug 2024 15:09:55 +0000 Heime heimeborgia@protonmail.com wro= te: >> >> > On Saturday, August 17th, 2024 at 3:01 AM, Heime >> > heimeborgia@protonmail.com wrote: >> > >> > > On Saturday, August 17th, 2024 at 12:26 AM, Stephen Berman >> > > stephen.berman@gmx.net wrote: >> > > >> > > > On Fri, 16 Aug 2024 12:10:48 +0000 Heime heimeborgia@protonmail.c= om wrote: >> > > > >> > > > > On Saturday, August 17th, 2024 at 12:03 AM, Heime >> > > > > heimeborgia@protonmail.com wrote: >> > > > > >> > > > > > On Friday, August 16th, 2024 at 11:51 PM, Stephen Berman >> > > > > > stephen.berman@gmx.net wrote: >> > > > > > >> > > > > > > On Fri, 16 Aug 2024 10:59:09 +0000 Heime >> > > > > > > heimeborgia@protonmail.com wrote: >> > > > > > > >> > > > > > > > On Friday, August 16th, 2024 at 10:20 PM, Heime >> > > > > > > > heimeborgia@protonmail.com wrote: >> > > > > > > > >> > > > > > > > > On Friday, August 16th, 2024 at 9:54 PM, Stephen Berman >> > > > > > > > > stephen.berman@gmx.net wrote: >> > > > > > > > > >> > > > > > > > > > On Fri, 16 Aug 2024 09:24:23 +0000 Heime >> > > > > > > > > > heimeborgia@protonmail.com wrote: >> > > > > > > > > > >> > > > > > > > > > > I want to display text starting from "(defun" up to= the >> > > > > > > > > > > second blank >> > > > > > > > > > > line that is encountered. >> > > > > > > > > > > >> > > > > > > > > > > But with this code I get >> > > > > > > > > > > >> > > > > > > > > > > insert: Args out of range: #= , 2706, 2804 >> > > > > > > > > > > >> > > > > > > > > > > (defun display-text () >> > > > > > > > > > > "Display the text between a line starting with '(de= fun' and >> > > > > > > > > > > the second >> > > > > > > > > > > blank line." >> > > > > > > > > > > (interactive) >> > > > > > > > > > > (let ((output-buffer (get-buffer-create "Defun Sect= ions"))) >> > > > > > > > > > > (with-current-buffer output-buffer >> > > > > > > > > > > (erase-buffer)) ;; Clear previous contents >> > > > > > > > > > > (save-excursion >> > > > > > > > > > > (goto-char (point-min)) >> > > > > > > > > > > (while (re-search-forward "^(defun" nil t) >> > > > > > > > > > > (let ((start (match-beginning 0)) >> > > > > > > > > > > (blank-lines 0) >> > > > > > > > > > > end) >> > > > > > > > > > > ;; Move forward to find the second blank line >> > > > > > > > > > > (while (and (< blank-lines 2) >> > > > > > > > > > > (re-search-forward "^\\s-*$" nil t)) >> > > > > > > > > > > (setq blank-lines (1+ blank-lines))) >> > > > > > > > > > > (setq end (point)) >> > > > > > > > > > > ;; Ensure the range is valid before inserting >> > > > > > > > > > > (when (> end start) >> > > > > > > > > > > (with-current-buffer output-buffer >> > > > > > > > > > > (insert (buffer-substring-no-properties start end) = "\n")))))) >> > > > > > > > > > > ;; Display the output buffer >> > > > > > > > > > > (display-buffer output-buffer))) >> > > > > > > > > > >> > > > > > > > > > You've set `start' and` end' in a different buffer th= an >> > > > > > > > > > output-buffer >> > > > > > > > > > but you're invoking buffer-substring-no-properties wi= th these >> > > > > > > > > > values in >> > > > > > > > > > output-buffer, which you've erased, so those values a= re not in >> > > > > > > > > > the range >> > > > > > > > > > of possible values in output-buffer. Try let-binding = the >> > > > > > > > > > result of >> > > > > > > > > > invoking buffer-substring-no-properties before the se= cond >> > > > > > > > > > invocation of >> > > > > > > > > > with-current-buffer. >> > > > > > > > > > >> > > > > > > > > > Steve Berman >> > > > > > > > >> > > > > > > > I updated as suggested. Although I get the output, the se= arch >> > > > > > > > stops on >> > > > > > > > the first >> > > > > > > > blank line rather than on the second blank line. >> > > > > > > >> > > > > > > Consider a buffer "test" with the following content (two bl= ank lines >> > > > > > > between the defuns): >> > > > > > > >> > > > > > > ;;;;;;;;;;;;; >> > > > > > > >> > > > > > > (defun f1 () >> > > > > > > (ignore)) >> > > > > > > >> > > > > > > (defun f2 () >> > > > > > > (ignore)) >> > > > > > > ;;;;;;;;;;;;; >> > > > > > > >> > > > > > > When you call `display-text' in "test", the first evaluatio= n of the >> > > > > > > sexp (re-search-forward "^\\s-*$" nil t) moves point to the= first blank >> > > > > > > line below the first defun. Where is point after the second= evaluation >> > > > > > > of that sexp? - Steve Berman >> > > > > > >> > > > > > It is still at the beginning of the first blank line. >> > > > > >> > > > > I do not understand why this happens. Because (point) after >> > > > > re-search-forward should give me the position at the beginning = of the >> > > > > second blank line that is encountered. >> > > > >> > > > The sexp (re-search-forward "^\\s-*$" nil t) succeeds if it find = a line >> > > > containing only zero or more whitespace characters and moves poin= t to >> > > > the end of the match. If point is on a blank line, the search suc= ceeds, >> > > > but since the beginning and end of the match coincide, point does= not >> > > > move. If you want point to move, your code needs to accommodate t= his >> > > > case. - Steve Berman >> > > >> > > Have printed start and end just after (setq end (point)) >> > > >> > > (message "Start: %d, End: %d" start end) >> > > >> > > And the values for start and end are different. >> >> >> `start' holds the value of the beginning of the match for "^(defun", bu= t >> your problem arises when searching for "^\\s-*$"; you'll see it if you >> change the message to this: >> >> (message "Start: %d, End: %d" (match-beginning 0) (match-end 0)) >> >> > When the first blank is reached, point moves to that blank, the next = search >> > keeps point at the same place rather than moving to the next blank li= ne. >> >> >> For the reason I explained above. - Steve Berman > > I have solved the problem by adding (forward-line 1) after setting blank= -lines > > (while (and (< blank-lines 2) > (re-search-forward "^\\s-*$" nil t)) > (setq blank-lines (1+ blank-lines)) > ;; Move point forward to avoid re-matching the same blank li= ne > (forward-line 1)) > > Could this fail on some circumstances ? Depends on what you consider failure: with the buffer "*test*" I gave as an example above, output-buffer contains not just two but three empty lines between the two defuns, and not just one but two empty lines at the end; is that what you want? Steve Berman