1 ;;; perl-mode.el --- Perl code editing commands for GNU Emacs
3 ;; Copyright (C) 1990, 1994 Free Software Foundation, Inc.
5 ;; Author: William F. Mann
10 ;; Adapted from C code editing commands 'c-mode.el', Copyright 1987 by the
11 ;; Free Software Foundation, under terms of its General Public License.
13 ;; This file is part of GNU Emacs.
15 ;; GNU Emacs is free software; you can redistribute it and/or modify
16 ;; it under the terms of the GNU General Public License as published by
17 ;; the Free Software Foundation; either version 2, or (at your option)
20 ;; GNU Emacs is distributed in the hope that it will be useful,
21 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
22 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 ;; GNU General Public License for more details.
25 ;; You should have received a copy of the GNU General Public License
26 ;; along with GNU Emacs; see the file COPYING. If not, write to
27 ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
31 ;; To enter perl-mode automatically, add (autoload 'perl-mode "perl-mode")
32 ;; to your .emacs file and change the first line of your perl script to:
33 ;; #!/usr/bin/perl -- # -*-Perl-*-
34 ;; With argments to perl:
35 ;; #!/usr/bin/perl -P- # -*-Perl-*-
36 ;; To handle files included with do 'filename.pl';, add something like
37 ;; (setq auto-mode-alist (append (list (cons "\\.pl\\'" 'perl-mode))
39 ;; to your .emacs file; otherwise the .pl suffix defaults to prolog-mode.
41 ;; This code is based on the 18.53 version c-mode.el, with extensive
42 ;; rewriting. Most of the features of c-mode survived intact.
44 ;; I added a new feature which adds functionality to TAB; it is controlled
45 ;; by the variable perl-tab-to-comment. With it enabled, TAB does the
46 ;; first thing it can from the following list: change the indentation;
47 ;; move past leading white space; delete an empty comment; reindent a
48 ;; comment; move to end of line; create an empty comment; tell you that
49 ;; the line ends in a quoted string, or has a # which should be a \#.
51 ;; If your machine is slow, you may want to remove some of the bindings
52 ;; to electric-perl-terminator. I changed the indenting defaults to be
53 ;; what Larry Wall uses in perl/lib, but left in all the options.
55 ;; I also tuned a few things: comments and labels starting in column
56 ;; zero are left there by indent-perl-exp; perl-beginning-of-function
57 ;; goes back to the first open brace/paren in column zero, the open brace
58 ;; in 'sub ... {', or the equal sign in 'format ... ='; indent-perl-exp
59 ;; (meta-^q) indents from the current line through the close of the next
60 ;; brace/paren, so you don't need to start exactly at a brace or paren.
62 ;; It may be good style to put a set of redundant braces around your
63 ;; main program. This will let you reindent it with meta-^q.
65 ;; Known problems (these are all caused by limitations in the Emacs Lisp
66 ;; parsing routine (parse-partial-sexp), which was not designed for such
67 ;; a rich language; writing a more suitable parser would be a big job):
68 ;; 1) Regular expression delimiters do not act as quotes, so special
69 ;; characters such as `'"#:;[](){} may need to be backslashed
70 ;; in regular expressions and in both parts of s/// and tr///.
71 ;; 2) The globbing syntax <pattern> is not recognized, so special
72 ;; characters in the pattern string must be backslashed.
73 ;; 3) The q, qq, and << quoting operators are not recognized; see below.
74 ;; 4) \ (backslash) always quotes the next character, so '\' is
75 ;; treated as the start of a string. Use "\\" as a work-around.
76 ;; 5) To make variables such a $' and $#array work, perl-mode treats
77 ;; $ just like backslash, so '$' is the same as problem 5.
78 ;; 6) Unfortunately, treating $ like \ makes ${var} be treated as an
79 ;; unmatched }. See below.
80 ;; 7) When ' (quote) is used as a package name separator, perl-mode
81 ;; doesn't understand, and thinks it is seeing a quoted string.
83 ;; Here are some ugly tricks to bypass some of these problems: the perl
84 ;; expression /`/ (that's a back-tick) usually evaluates harmlessly,
85 ;; but will trick perl-mode into starting a quoted string, which
86 ;; can be ended with another /`/. Assuming you have no embedded
87 ;; back-ticks, this can used to help solve problem 3:
89 ;; /`/; $ugly = q?"'$?; /`/;
91 ;; To solve problem 6, add a /{/; before each use of ${var}:
92 ;; /{/; while (<${glob_me}>) ...
94 ;; Problem 7 is even worse, but this 'fix' does work :-(
101 (defvar perl-mode-abbrev-table nil
102 "Abbrev table in use in perl-mode buffers.")
103 (define-abbrev-table 'perl-mode-abbrev-table ())
105 (defvar perl-mode-map ()
106 "Keymap used in Perl mode.")
109 (setq perl-mode-map (make-sparse-keymap))
110 (define-key perl-mode-map "{" 'electric-perl-terminator)
111 (define-key perl-mode-map "}" 'electric-perl-terminator)
112 (define-key perl-mode-map ";" 'electric-perl-terminator)
113 (define-key perl-mode-map ":" 'electric-perl-terminator)
114 (define-key perl-mode-map "\e\C-a" 'perl-beginning-of-function)
115 (define-key perl-mode-map "\e\C-e" 'perl-end-of-function)
116 (define-key perl-mode-map "\e\C-h" 'mark-perl-function)
117 (define-key perl-mode-map "\e\C-q" 'indent-perl-exp)
118 (define-key perl-mode-map "\177" 'backward-delete-char-untabify)
119 (define-key perl-mode-map "\t" 'perl-indent-command))
121 (autoload 'c-macro-expand "cmacexp"
122 "Display the result of expanding all C macros occurring in the region.
123 The expansion is entirely correct because it uses the C preprocessor."
126 (defvar perl-mode-syntax-table nil
127 "Syntax table in use in perl-mode buffers.")
129 (if perl-mode-syntax-table
131 (setq perl-mode-syntax-table (make-syntax-table (standard-syntax-table)))
132 (modify-syntax-entry ?\n ">" perl-mode-syntax-table)
133 (modify-syntax-entry ?# "<" perl-mode-syntax-table)
134 (modify-syntax-entry ?$ "/" perl-mode-syntax-table)
135 (modify-syntax-entry ?% "." perl-mode-syntax-table)
136 (modify-syntax-entry ?& "." perl-mode-syntax-table)
137 (modify-syntax-entry ?\' "\"" perl-mode-syntax-table)
138 (modify-syntax-entry ?* "." perl-mode-syntax-table)
139 (modify-syntax-entry ?+ "." perl-mode-syntax-table)
140 (modify-syntax-entry ?- "." perl-mode-syntax-table)
141 (modify-syntax-entry ?/ "." perl-mode-syntax-table)
142 (modify-syntax-entry ?< "." perl-mode-syntax-table)
143 (modify-syntax-entry ?= "." perl-mode-syntax-table)
144 (modify-syntax-entry ?> "." perl-mode-syntax-table)
145 (modify-syntax-entry ?\\ "\\" perl-mode-syntax-table)
146 (modify-syntax-entry ?` "\"" perl-mode-syntax-table)
147 (modify-syntax-entry ?| "." perl-mode-syntax-table)
150 (defvar perl-imenu-generic-expression
153 (nil "^sub\\s-+\\([-A-Za-z0-9+_:]+\\)\\(\\s-\\|\n\\)*{" 1 )
155 ("Variables" "^\\([$@%][-A-Za-z0-9+_:]+\\)\\s-*=" 1 )
157 "Imenu generic expression for Perl mode. See `imenu-generic-expression'.")
159 (defvar perl-font-lock-keywords
161 ; ("if" "until" "while" "elsif" "else" "unless" "for" "foreach" "continue"
162 ; "exit" "die" "last" "goto" "next" "redo" "return" "local" "exec")
164 "continue\\|die\\|e\\(ls\\(e\\|if\\)\\|x\\(ec\\|it\\)\\)\\|"
165 "for\\(\\|each\\)\\|goto\\|if\\|l\\(ast\\|ocal\\)\\|next\\|"
166 "re\\(do\\|turn\\)\\|un\\(less\\|til\\)\\|while"
168 ; ("#endif" "#else" "#ifdef" "#ifndef" "#if" "#include" "#define" "#undef")
169 (cons (concat "#\\(define\\|e\\(lse\\|ndif\\)\\|"
170 "i\\(f\\(\\|def\\|ndef\\)\\|nclude\\)\\|undef\\)\\>")
171 'font-lock-reference-face)
172 '("^[ \n\t]*sub[ \t]+\\([^ \t{]+\\)[ \t]*[{]" 1 font-lock-function-name-face)
173 '("[ \n\t{]*\\(eval\\)[ \n\t(;]" 1 font-lock-function-name-face)
174 '("\\(--- .* ---\\|=== .* ===\\)" . font-lock-string-face)
176 "Additional expressions to highlight in Perl mode.")
178 (defvar perl-indent-level 4
179 "*Indentation of Perl statements with respect to containing block.")
180 (defvar perl-continued-statement-offset 4
181 "*Extra indent for lines not starting new statements.")
182 (defvar perl-continued-brace-offset -4
183 "*Extra indent for substatements that start with open-braces.
184 This is in addition to `perl-continued-statement-offset'.")
185 (defvar perl-brace-offset 0
186 "*Extra indentation for braces, compared with other text in same context.")
187 (defvar perl-brace-imaginary-offset 0
188 "*Imagined indentation of an open brace that actually follows a statement.")
189 (defvar perl-label-offset -2
190 "*Offset of Perl label lines relative to usual indentation.")
192 (defvar perl-tab-always-indent t
193 "*Non-nil means TAB in Perl mode always indents the current line.
194 Otherwise it inserts a tab character if you type it past the first
195 nonwhite character on the line.")
197 ;; I changed the default to nil for consistency with general Emacs
198 ;; conventions -- rms.
199 (defvar perl-tab-to-comment nil
200 "*Non-nil means TAB moves to eol or makes a comment in some cases.
201 For lines which don't need indenting, TAB either indents an
202 existing comment, moves to end-of-line, or if at end-of-line already,
203 create a new comment.")
205 (defvar perl-nochange ";?#\\|\f\\|\\s(\\|\\(\\w\\|\\s_\\)+:"
206 "*Lines starting with this regular expression are not auto-indented.")
210 "Major mode for editing Perl code.
211 Expression and list commands understand all Perl brackets.
212 Tab indents for Perl code.
213 Comments are delimited with # ... \\n.
214 Paragraphs are separated by blank lines only.
215 Delete converts tabs to spaces as it moves back.
217 Variables controlling indentation style:
218 perl-tab-always-indent
219 Non-nil means TAB in Perl mode should always indent the current line,
220 regardless of where in the line point is when the TAB command is used.
222 Non-nil means that for lines which don't need indenting, TAB will
223 either delete an empty comment, indent an existing comment, move
224 to end-of-line, or if at end-of-line already, create a new comment.
226 Lines starting with this regular expression are not auto-indented.
228 Indentation of Perl statements within surrounding block.
229 The surrounding block's indentation is the indentation
230 of the line on which the open-brace appears.
231 perl-continued-statement-offset
232 Extra indentation given to a substatement, such as the
233 then-clause of an if or body of a while.
234 perl-continued-brace-offset
235 Extra indentation given to a brace that starts a substatement.
236 This is in addition to `perl-continued-statement-offset'.
238 Extra indentation for line if it starts with an open brace.
239 perl-brace-imaginary-offset
240 An open brace following other text is treated as if it were
241 this far to the right of the start of its line.
243 Extra indentation for line that is a label.
245 Various indentation styles: K&R BSD BLK GNU LW
246 perl-indent-level 5 8 0 2 4
247 perl-continued-statement-offset 5 8 4 2 4
248 perl-continued-brace-offset 0 0 0 0 -4
249 perl-brace-offset -5 -8 0 0 0
250 perl-brace-imaginary-offset 0 0 4 0 0
251 perl-label-offset -5 -8 -2 -2 -2
253 Turning on Perl mode runs the normal hook `perl-mode-hook'."
255 (kill-all-local-variables)
256 (use-local-map perl-mode-map)
257 (setq major-mode 'perl-mode)
258 (setq mode-name "Perl")
259 (setq local-abbrev-table perl-mode-abbrev-table)
260 (set-syntax-table perl-mode-syntax-table)
261 (make-local-variable 'paragraph-start)
262 (setq paragraph-start (concat "$\\|" page-delimiter))
263 (make-local-variable 'paragraph-separate)
264 (setq paragraph-separate paragraph-start)
265 (make-local-variable 'paragraph-ignore-fill-prefix)
266 (setq paragraph-ignore-fill-prefix t)
267 (make-local-variable 'indent-line-function)
268 (setq indent-line-function 'perl-indent-line)
269 (make-local-variable 'require-final-newline)
270 (setq require-final-newline t)
271 (make-local-variable 'comment-start)
272 (setq comment-start "# ")
273 (make-local-variable 'comment-end)
274 (setq comment-end "")
275 (make-local-variable 'comment-column)
276 (setq comment-column 32)
277 (make-local-variable 'comment-start-skip)
278 (setq comment-start-skip "\\(^\\|\\s-\\);?#+ *")
279 (make-local-variable 'comment-indent-function)
280 (setq comment-indent-function 'perl-comment-indent)
281 (make-local-variable 'parse-sexp-ignore-comments)
282 (setq parse-sexp-ignore-comments t)
283 (make-local-variable 'font-lock-defaults)
284 (setq font-lock-defaults '(perl-font-lock-keywords))
285 ;; Tell imenu how to handle Perl.
286 (make-local-variable 'imenu-generic-expression)
287 (setq imenu-generic-expression perl-imenu-generic-expression)
288 (run-hooks 'perl-mode-hook))
290 ;; This is used by indent-for-comment
291 ;; to decide how much to indent a comment in Perl code
292 ;; based on its context.
293 (defun perl-comment-indent ()
294 (if (and (bolp) (not (eolp)))
295 0 ;Existing comment at bol stays there.
297 (skip-chars-backward " \t")
298 (max (if (bolp) ;Else indent at comment column
299 0 ; except leave at least one space if
300 (1+ (current-column))) ; not at beginning of line.
303 (defun electric-perl-terminator (arg)
304 "Insert character and adjust indentation.
305 If at end-of-line, and not in a comment or a quote, correct the's indentation."
307 (let ((insertpos (point)))
308 (and (not arg) ; decide whether to indent
312 (and (not ; eliminate comments quickly
313 (re-search-forward comment-start-skip insertpos t))
314 (or (/= last-command-char ?:)
315 ;; Colon is special only after a label ....
316 (looking-at "\\s-*\\(\\w\\|\\s_\\)+$"))
317 (let ((pps (parse-partial-sexp
318 (perl-beginning-of-function) insertpos)))
319 (not (or (nth 3 pps) (nth 4 pps) (nth 5 pps))))))
320 (progn ; must insert, indent, delete
321 (insert-char last-command-char 1)
324 (self-insert-command (prefix-numeric-value arg)))
326 ;; not used anymore, but may be useful someday:
327 ;;(defun perl-inside-parens-p ()
328 ;; (condition-case ()
331 ;; (narrow-to-region (point)
332 ;; (perl-beginning-of-function))
333 ;; (goto-char (point-max))
334 ;; (= (char-after (or (scan-lists (point) -1 1) (point-min))) ?\()))
337 (defun perl-indent-command (&optional arg)
338 "Indent current line as Perl code, or optionally, insert a tab character.
340 With an argument, indent the current line, regardless of other options.
342 If `perl-tab-always-indent' is nil and point is not in the indentation
343 area at the beginning of the line, simply insert a tab.
345 Otherwise, indent the current line. If point was within the indentation
346 area it is moved to the end of the indentation area. If the line was
347 already indented properly and point was not within the indentation area,
348 and if `perl-tab-to-comment' is non-nil (the default), then do the first
349 possible action from the following list:
351 1) delete an empty comment
352 2) move forward to start of comment, indenting if necessary
353 3) move forward to end of line
354 4) create an empty comment
355 5) move backward to start of comment, indenting if necessary."
357 (if arg ; If arg, just indent this line
358 (perl-indent-line "\f")
359 (if (and (not perl-tab-always-indent)
360 (> (current-column) (current-indentation)))
362 (let (bof lsexp delta (oldpnt (point)))
365 (setq bof (perl-beginning-of-function))
367 (setq delta (perl-indent-line "\f\\|;?#" bof))
368 (and perl-tab-to-comment
369 (= oldpnt (point)) ; done if point moved
370 (if (listp delta) ; if line starts in a quoted string
371 (setq lsexp (or (nth 2 delta) bof))
372 (= delta 0)) ; done if indenting occurred
376 (if (= (char-after bof) ?=)
378 (message "In a format statement"))
379 (setq state (parse-partial-sexp lsexp eol))
381 (if (= oldpnt eol) ; already at eol in a string
382 (message "In a string which starts with a %c."
384 (if (not (nth 4 state))
385 (if (= oldpnt eol) ; no comment, create one?
386 (indent-for-comment))
388 (if (re-search-forward comment-start-skip eol 'move)
390 (progn ; kill existing comment
391 (goto-char (match-beginning 0))
392 (skip-chars-backward " \t")
393 (kill-region (point) eol))
394 (if (or (< oldpnt (point)) (= oldpnt eol))
395 (indent-for-comment) ; indent existing comment
399 (message "Use backslash to quote # characters.")
402 (defun perl-indent-line (&optional nochange parse-start)
403 "Indent current line as Perl code.
404 Return the amount the indentation
405 changed by, or (parse-state) if line starts in a quoted string."
406 (let ((case-fold-search nil)
407 (pos (- (point-max) (point)))
408 (bof (or parse-start (save-excursion (perl-beginning-of-function))))
409 beg indent shift-amt)
413 (cond ((= (char-after bof) ?=) 0)
414 ((listp (setq indent (calculate-perl-indent bof))) indent)
415 ((looking-at (or nochange perl-nochange)) 0)
417 (skip-chars-forward " \t\f")
418 (cond ((looking-at "\\(\\w\\|\\s_\\)+:")
419 (setq indent (max 1 (+ indent perl-label-offset))))
420 ((= (following-char) ?})
421 (setq indent (- indent perl-indent-level)))
422 ((= (following-char) ?{)
423 (setq indent (+ indent perl-brace-offset))))
424 (- indent (current-column)))))
425 (skip-chars-forward " \t\f")
426 (if (and (numberp shift-amt) (/= 0 shift-amt))
427 (progn (delete-region beg (point))
429 ;; If initial point was within line's indentation,
430 ;; position after the indentation. Else stay at same point in text.
431 (if (> (- (point-max) pos) (point))
432 (goto-char (- (point-max) pos)))
435 (defun calculate-perl-indent (&optional parse-start)
436 "Return appropriate indentation for current line as Perl code.
437 In usual case returns an integer: the column to indent to.
438 Returns (parse-state) if line starts inside a string."
441 (let ((indent-point (point))
442 (case-fold-search nil)
444 state containing-sexp)
445 (if parse-start ;used to avoid searching
446 (goto-char parse-start)
447 (perl-beginning-of-function))
448 (while (< (point) indent-point) ;repeat until right sexp
449 (setq parse-start (point))
450 (setq state (parse-partial-sexp (point) indent-point 0))
451 ; state = (depth_in_parens innermost_containing_list last_complete_sexp
452 ; string_terminator_or_nil inside_commentp following_quotep
453 ; minimum_paren-depth_this_scan)
454 ; Parsing stops if depth in parentheses becomes equal to third arg.
455 (setq containing-sexp (nth 1 state)))
456 (cond ((nth 3 state) state) ; In a quoted string?
457 ((null containing-sexp) ; Line is at top level.
458 (skip-chars-forward " \t\f")
459 (if (= (following-char) ?{)
460 0 ; move to beginning of line if it starts a function body
461 ;; indent a little if this is a continuation line
462 (perl-backward-to-noncomment)
464 (memq (preceding-char) '(?\; ?\})))
465 0 perl-continued-statement-offset)))
466 ((/= (char-after containing-sexp) ?{)
467 ;; line is expression, not statement:
468 ;; indent to just after the surrounding open.
469 (goto-char (1+ containing-sexp))
472 ;; Statement level. Is it a continuation or a new statement?
473 ;; Find previous non-comment character.
474 (perl-backward-to-noncomment)
475 ;; Back up over label lines, since they don't
476 ;; affect whether our line is a continuation.
477 (while (or (eq (preceding-char) ?\,)
478 (and (eq (preceding-char) ?:)
479 (memq (char-syntax (char-after (- (point) 2)))
481 (if (eq (preceding-char) ?\,)
482 (perl-backward-to-start-of-continued-exp containing-sexp)
484 (perl-backward-to-noncomment))
485 ;; Now we get the answer.
486 (if (not (memq (preceding-char) '(?\; ?\} ?\{)))
487 ;; This line is continuation of preceding line's statement;
488 ;; indent perl-continued-statement-offset more than the
489 ;; previous line of the statement.
491 (perl-backward-to-start-of-continued-exp containing-sexp)
492 (+ perl-continued-statement-offset (current-column)
493 (if (save-excursion (goto-char indent-point)
494 (looking-at "[ \t]*{"))
495 perl-continued-brace-offset 0)))
496 ;; This line starts a new statement.
497 ;; Position at last unclosed open.
498 (goto-char containing-sexp)
500 ;; If open paren is in col 0, close brace is special
502 (save-excursion (goto-char indent-point)
503 (looking-at "[ \t]*}"))
505 ;; Is line first statement after an open-brace?
506 ;; If no, find that first statement and indent like it.
509 ;; Skip over comments and labels following openbrace.
511 (skip-chars-forward " \t\f\n")
512 (cond ((looking-at ";?#")
514 ((looking-at "\\(\\w\\|\\s_\\)+:")
517 (setq colon-line-end (point)))
518 (search-forward ":")))))
519 ;; The first following code counts
520 ;; if it is before the line we want to indent.
521 (and (< (point) indent-point)
522 (if (> colon-line-end (point))
523 (- (current-indentation) perl-label-offset)
525 ;; If no previous statement,
526 ;; indent it relative to line brace is on.
527 ;; For open paren in column zero, don't let statement
528 ;; start there too. If perl-indent-level is zero,
529 ;; use perl-brace-offset + perl-continued-statement-offset
530 ;; For open-braces not the first thing in a line,
531 ;; add in perl-brace-imaginary-offset.
532 (+ (if (and (bolp) (zerop perl-indent-level))
533 (+ perl-brace-offset perl-continued-statement-offset)
535 ;; Move back over whitespace before the openbrace.
536 ;; If openbrace is not first nonwhite thing on the line,
537 ;; add the perl-brace-imaginary-offset.
538 (progn (skip-chars-backward " \t")
539 (if (bolp) 0 perl-brace-imaginary-offset))
540 ;; If the openbrace is preceded by a parenthesized exp,
541 ;; move to the beginning of that;
542 ;; possibly a different line
544 (if (eq (preceding-char) ?\))
546 ;; Get initial indentation of the line we are on.
547 (current-indentation))))))))))
549 (defun perl-backward-to-noncomment ()
550 "Move point backward to after the first non-white-space, skipping comments."
554 (setq opoint (point))
556 (if (re-search-forward comment-start-skip opoint 'move 1)
557 (progn (goto-char (match-end 1))
558 (skip-chars-forward ";")))
559 (skip-chars-backward " \t\f")
560 (setq stop (or (bobp)
562 (forward-char -1))))))
564 (defun perl-backward-to-start-of-continued-exp (lim)
565 (if (= (preceding-char) ?\))
569 (goto-char (1+ lim)))
570 (skip-chars-forward " \t\f"))
572 ;; note: this may be slower than the c-mode version, but I can understand it.
573 (defun indent-perl-exp ()
574 "Indent each line of the Perl grouping following point."
576 (let* ((case-fold-search nil)
577 (oldpnt (point-marker))
578 (bof-mark (save-excursion
580 (perl-beginning-of-function)
582 eol last-mark lsexp-mark delta)
583 (if (= (char-after (marker-position bof-mark)) ?=)
584 (message "Can't indent a format statement")
585 (message "Indenting Perl expression...")
586 (save-excursion (end-of-line) (setq eol (point)))
587 (save-excursion ; locate matching close paren
588 (while (and (not (eobp)) (<= (point) eol))
589 (parse-partial-sexp (point) (point-max) 0))
590 (setq last-mark (point-marker)))
591 (setq lsexp-mark bof-mark)
593 (while (< (point) (marker-position last-mark))
594 (setq delta (perl-indent-line nil (marker-position bof-mark)))
595 (if (numberp delta) ; unquoted start-of-line?
598 (delete-horizontal-space))
599 (setq lsexp-mark (point-marker))))
602 (if (nth 4 (parse-partial-sexp (marker-position lsexp-mark) eol))
603 (progn ; line ends in a comment
605 (if (or (not (looking-at "\\s-*;?#"))
608 (= (- (current-indentation) delta) comment-column)))
609 (if (re-search-forward comment-start-skip eol t)
610 (indent-for-comment))))) ; indent existing comment
612 (goto-char (marker-position oldpnt))
613 (message "Indenting Perl expression...done"))))
615 (defun perl-beginning-of-function (&optional arg)
616 "Move backward to next beginning-of-function, or as far as possible.
617 With argument, repeat that many times; negative args move forward.
618 Returns new value of point in all cases."
620 (or arg (setq arg 1))
621 (if (< arg 0) (forward-char 1))
623 (re-search-backward "^\\s(\\|^\\s-*sub\\b[^{]+{\\|^\\s-*format\\b[^=]*=\\|^\\."
625 (goto-char (1- (match-end 0))))
628 ;; note: this routine is adapted directly from emacs lisp.el, end-of-defun;
629 ;; no bugs have been removed :-)
630 (defun perl-end-of-function (&optional arg)
631 "Move forward to next end-of-function.
632 The end of a function is found by moving forward from the beginning of one.
633 With argument, repeat that many times; negative args move backward."
635 (or arg (setq arg 1))
637 (while (and (> arg 0) (< (point) (point-max)))
638 (let ((pos (point)) npos)
643 (perl-beginning-of-function 1)
646 (or (bobp) (forward-char -1))
647 (perl-beginning-of-function -1))
650 (skip-chars-forward " \t")
651 (if (looking-at "[#\n]")
657 (perl-beginning-of-function 1)
661 (if (progn (perl-beginning-of-function 2) (not (bobp)))
664 (skip-chars-forward " \t")
665 (if (looking-at "[#\n]")
667 (goto-char (point-min)))))
668 (setq arg (1+ arg)))))
670 (defun mark-perl-function ()
671 "Put mark at end of Perl function, point at beginning."
674 (perl-end-of-function)
676 (perl-beginning-of-function)
677 (backward-paragraph))
679 ;;;;;;;; That's all, folks! ;;;;;;;;;