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 the
27 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
28 ;; Boston, MA 02111-1307, USA.
32 ;; To enter perl-mode automatically, add (autoload 'perl-mode "perl-mode")
33 ;; to your .emacs file and change the first line of your perl script to:
34 ;; #!/usr/bin/perl -- # -*-Perl-*-
35 ;; With arguments to perl:
36 ;; #!/usr/bin/perl -P- # -*-Perl-*-
37 ;; To handle files included with do 'filename.pl';, add something like
38 ;; (setq auto-mode-alist (append (list (cons "\\.pl\\'" 'perl-mode))
40 ;; to your .emacs file; otherwise the .pl suffix defaults to prolog-mode.
42 ;; This code is based on the 18.53 version c-mode.el, with extensive
43 ;; rewriting. Most of the features of c-mode survived intact.
45 ;; I added a new feature which adds functionality to TAB; it is controlled
46 ;; by the variable perl-tab-to-comment. With it enabled, TAB does the
47 ;; first thing it can from the following list: change the indentation;
48 ;; move past leading white space; delete an empty comment; reindent a
49 ;; comment; move to end of line; create an empty comment; tell you that
50 ;; the line ends in a quoted string, or has a # which should be a \#.
52 ;; If your machine is slow, you may want to remove some of the bindings
53 ;; to electric-perl-terminator. I changed the indenting defaults to be
54 ;; what Larry Wall uses in perl/lib, but left in all the options.
56 ;; I also tuned a few things: comments and labels starting in column
57 ;; zero are left there by indent-perl-exp; perl-beginning-of-function
58 ;; goes back to the first open brace/paren in column zero, the open brace
59 ;; in 'sub ... {', or the equal sign in 'format ... ='; indent-perl-exp
60 ;; (meta-^q) indents from the current line through the close of the next
61 ;; brace/paren, so you don't need to start exactly at a brace or paren.
63 ;; It may be good style to put a set of redundant braces around your
64 ;; main program. This will let you reindent it with meta-^q.
66 ;; Known problems (these are all caused by limitations in the Emacs Lisp
67 ;; parsing routine (parse-partial-sexp), which was not designed for such
68 ;; a rich language; writing a more suitable parser would be a big job):
69 ;; 1) Regular expression delimiters do not act as quotes, so special
70 ;; characters such as `'"#:;[](){} may need to be backslashed
71 ;; in regular expressions and in both parts of s/// and tr///.
72 ;; 2) The globbing syntax <pattern> is not recognized, so special
73 ;; characters in the pattern string must be backslashed.
74 ;; 3) The q, qq, and << quoting operators are not recognized; see below.
75 ;; 4) \ (backslash) always quotes the next character, so '\' is
76 ;; treated as the start of a string. Use "\\" as a work-around.
77 ;; 5) To make variables such a $' and $#array work, perl-mode treats
78 ;; $ just like backslash, so '$' is the same as problem 5.
79 ;; 6) Unfortunately, treating $ like \ makes ${var} be treated as an
80 ;; unmatched }. See below.
81 ;; 7) When ' (quote) is used as a package name separator, perl-mode
82 ;; doesn't understand, and thinks it is seeing a quoted string.
84 ;; Here are some ugly tricks to bypass some of these problems: the perl
85 ;; expression /`/ (that's a back-tick) usually evaluates harmlessly,
86 ;; but will trick perl-mode into starting a quoted string, which
87 ;; can be ended with another /`/. Assuming you have no embedded
88 ;; back-ticks, this can used to help solve problem 3:
90 ;; /`/; $ugly = q?"'$?; /`/;
92 ;; To solve problem 6, add a /{/; before each use of ${var}:
93 ;; /{/; while (<${glob_me}>) ...
95 ;; Problem 7 is even worse, but this 'fix' does work :-(
102 (defvar perl-mode-abbrev-table nil
103 "Abbrev table in use in perl-mode buffers.")
104 (define-abbrev-table 'perl-mode-abbrev-table
())
106 (defvar perl-mode-map
()
107 "Keymap used in Perl mode.")
110 (setq perl-mode-map
(make-sparse-keymap))
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
":" 'electric-perl-terminator
)
115 (define-key perl-mode-map
"\e\C-a" 'perl-beginning-of-function
)
116 (define-key perl-mode-map
"\e\C-e" 'perl-end-of-function
)
117 (define-key perl-mode-map
"\e\C-h" 'mark-perl-function
)
118 (define-key perl-mode-map
"\e\C-q" 'indent-perl-exp
)
119 (define-key perl-mode-map
"\177" 'backward-delete-char-untabify
)
120 (define-key perl-mode-map
"\t" 'perl-indent-command
))
122 (autoload 'c-macro-expand
"cmacexp"
123 "Display the result of expanding all C macros occurring in the region.
124 The expansion is entirely correct because it uses the C preprocessor."
127 (defvar perl-mode-syntax-table nil
128 "Syntax table in use in perl-mode buffers.")
130 (if perl-mode-syntax-table
132 (setq perl-mode-syntax-table
(make-syntax-table (standard-syntax-table)))
133 (modify-syntax-entry ?
\n ">" 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
)
148 (modify-syntax-entry ?|
"." perl-mode-syntax-table
)
151 (defvar perl-imenu-generic-expression
154 (nil "^sub\\s-+\\([-A-Za-z0-9+_:]+\\)\\(\\s-\\|\n\\)*{" 1 )
156 ("Variables" "^\\([$@%][-A-Za-z0-9+_:]+\\)\\s-*=" 1 )
157 ("Packages" "^package\\s-+\\([-A-Za-z0-9+_:]+\\);" 1 )
159 "Imenu generic expression for Perl mode. See `imenu-generic-expression'.")
161 ;; Regexps updated with help from Tom Tromey <tromey@cambric.colorado.edu> and
162 ;; Jim Campbell <jec@murzim.ca.boeing.com>.
164 (defconst perl-font-lock-keywords-1
165 '(;; What is this for?
166 ;;("\\(--- .* ---\\|=== .* ===\\)" . font-lock-string-face)
168 ;; Fontify preprocessor statements as we do in `c-font-lock-keywords'.
169 ;; Ilya Zakharevich <ilya@math.ohio-state.edu> thinks this is a bad idea.
170 ("^#[ \t]*include[ \t]+\\(<[^>\"\n]+>\\)" 1 font-lock-string-face
)
171 ("^#[ \t]*define[ \t]+\\(\\sw+\\)(" 1 font-lock-function-name-face
)
173 ("\\<\\(defined\\)\\>[ \t]*(?\\(\\sw+\\)?" nil nil
174 (1 font-lock-reference-face
) (2 font-lock-variable-name-face nil t
)))
175 ("^#[ \t]*\\(\\sw+\\)\\>[ \t]*\\(\\sw+\\)?"
176 (1 font-lock-reference-face
) (2 font-lock-variable-name-face nil t
))
178 ;; Fontify function and package names in declarations.
179 ("\\<\\(package\\|sub\\)\\>[ \t]*\\(\\sw+\\)?"
180 (1 font-lock-keyword-face
) (2 font-lock-function-name-face nil t
))
181 ("\\<\\(import\\|no\\|require\\|use\\)\\>[ \t]*\\(\\sw+\\)?"
182 (1 font-lock-keyword-face
) (2 font-lock-reference-face nil t
)))
183 "Subdued level highlighting for Perl mode.")
185 (defconst perl-font-lock-keywords-2
186 (append perl-font-lock-keywords-1
189 ;; Fontify keywords, except those fontified otherwise.
190 ; (make-regexp '("if" "until" "while" "elsif" "else" "unless" "do" "dump"
191 ; "for" "foreach" "exit" "die"
192 ; "BEGIN" "END" "return" "exec" "eval"))
194 "BEGIN\\|END\\|d\\(ie\\|o\\|ump\\)\\|"
195 "e\\(ls\\(e\\|if\\)\\|val\\|x\\(ec\\|it\\)\\)\\|"
196 "for\\(\\|each\\)\\|if\\|return\\|un\\(less\\|til\\)\\|while"
199 ;; Fontify local and my keywords as types.
200 '("\\<\\(local\\|my\\)\\>" . font-lock-type-face
)
202 ;; Fontify function, variable and file name references.
203 '("&\\(\\sw+\\)" 1 font-lock-function-name-face
)
204 ;; Additionally underline non-scalar variables. Maybe this is a bad idea.
205 ;;'("[$@%*][#{]?\\(\\sw+\\)" 1 font-lock-variable-name-face)
206 '("[$*]{?\\(\\sw+\\)" 1 font-lock-variable-name-face
)
207 '("\\([@%]\\|\\$#\\)\\(\\sw+\\)"
208 (2 (cons font-lock-variable-name-face
'(underline))))
209 '("<\\(\\sw+\\)>" 1 font-lock-reference-face
)
211 ;; Fontify keywords with/and labels as we do in `c++-font-lock-keywords'.
212 '("\\<\\(continue\\|goto\\|last\\|next\\|redo\\)\\>[ \t]*\\(\\sw+\\)?"
213 (1 font-lock-keyword-face
) (2 font-lock-reference-face nil t
))
214 '("^[ \t]*\\(\\sw+\\)[ \t]*:[^:]" 1 font-lock-reference-face
)))
215 "Gaudy level highlighting for Perl mode.")
217 (defvar perl-font-lock-keywords perl-font-lock-keywords-1
218 "Default expressions to highlight in Perl mode.")
221 (defvar perl-indent-level
4
222 "*Indentation of Perl statements with respect to containing block.")
223 (defvar perl-continued-statement-offset
4
224 "*Extra indent for lines not starting new statements.")
225 (defvar perl-continued-brace-offset -
4
226 "*Extra indent for substatements that start with open-braces.
227 This is in addition to `perl-continued-statement-offset'.")
228 (defvar perl-brace-offset
0
229 "*Extra indentation for braces, compared with other text in same context.")
230 (defvar perl-brace-imaginary-offset
0
231 "*Imagined indentation of an open brace that actually follows a statement.")
232 (defvar perl-label-offset -
2
233 "*Offset of Perl label lines relative to usual indentation.")
235 (defvar perl-tab-always-indent t
236 "*Non-nil means TAB in Perl mode always indents the current line.
237 Otherwise it inserts a tab character if you type it past the first
238 nonwhite character on the line.")
240 ;; I changed the default to nil for consistency with general Emacs
241 ;; conventions -- rms.
242 (defvar perl-tab-to-comment nil
243 "*Non-nil means TAB moves to eol or makes a comment in some cases.
244 For lines which don't need indenting, TAB either indents an
245 existing comment, moves to end-of-line, or if at end-of-line already,
246 create a new comment.")
248 (defvar perl-nochange
";?#\\|\f\\|\\s(\\|\\(\\w\\|\\s_\\)+:"
249 "*Lines starting with this regular expression are not auto-indented.")
253 "Major mode for editing Perl code.
254 Expression and list commands understand all Perl brackets.
255 Tab indents for Perl code.
256 Comments are delimited with # ... \\n.
257 Paragraphs are separated by blank lines only.
258 Delete converts tabs to spaces as it moves back.
260 Variables controlling indentation style:
261 perl-tab-always-indent
262 Non-nil means TAB in Perl mode should always indent the current line,
263 regardless of where in the line point is when the TAB command is used.
265 Non-nil means that for lines which don't need indenting, TAB will
266 either delete an empty comment, indent an existing comment, move
267 to end-of-line, or if at end-of-line already, create a new comment.
269 Lines starting with this regular expression are not auto-indented.
271 Indentation of Perl statements within surrounding block.
272 The surrounding block's indentation is the indentation
273 of the line on which the open-brace appears.
274 perl-continued-statement-offset
275 Extra indentation given to a substatement, such as the
276 then-clause of an if or body of a while.
277 perl-continued-brace-offset
278 Extra indentation given to a brace that starts a substatement.
279 This is in addition to `perl-continued-statement-offset'.
281 Extra indentation for line if it starts with an open brace.
282 perl-brace-imaginary-offset
283 An open brace following other text is treated as if it were
284 this far to the right of the start of its line.
286 Extra indentation for line that is a label.
288 Various indentation styles: K&R BSD BLK GNU LW
289 perl-indent-level 5 8 0 2 4
290 perl-continued-statement-offset 5 8 4 2 4
291 perl-continued-brace-offset 0 0 0 0 -4
292 perl-brace-offset -5 -8 0 0 0
293 perl-brace-imaginary-offset 0 0 4 0 0
294 perl-label-offset -5 -8 -2 -2 -2
296 Turning on Perl mode runs the normal hook `perl-mode-hook'."
298 (kill-all-local-variables)
299 (use-local-map perl-mode-map
)
300 (setq major-mode
'perl-mode
)
301 (setq mode-name
"Perl")
302 (setq local-abbrev-table perl-mode-abbrev-table
)
303 (set-syntax-table perl-mode-syntax-table
)
304 (make-local-variable 'paragraph-start
)
305 (setq paragraph-start
(concat "$\\|" page-delimiter
))
306 (make-local-variable 'paragraph-separate
)
307 (setq paragraph-separate paragraph-start
)
308 (make-local-variable 'paragraph-ignore-fill-prefix
)
309 (setq paragraph-ignore-fill-prefix t
)
310 (make-local-variable 'indent-line-function
)
311 (setq indent-line-function
'perl-indent-line
)
312 (make-local-variable 'require-final-newline
)
313 (setq require-final-newline t
)
314 (make-local-variable 'comment-start
)
315 (setq comment-start
"# ")
316 (make-local-variable 'comment-end
)
317 (setq comment-end
"")
318 (make-local-variable 'comment-column
)
319 (setq comment-column
32)
320 (make-local-variable 'comment-start-skip
)
321 (setq comment-start-skip
"\\(^\\|\\s-\\);?#+ *")
322 (make-local-variable 'comment-indent-function
)
323 (setq comment-indent-function
'perl-comment-indent
)
324 (make-local-variable 'parse-sexp-ignore-comments
)
325 (setq parse-sexp-ignore-comments t
)
326 ;; Tell font-lock.el how to handle Perl.
327 (make-local-variable 'font-lock-defaults
)
328 (setq font-lock-defaults
'((perl-font-lock-keywords
329 perl-font-lock-keywords-1
330 perl-font-lock-keywords-2
)
331 nil nil
((?\_ .
"w"))))
332 ;; Tell imenu how to handle Perl.
333 (make-local-variable 'imenu-generic-expression
)
334 (setq imenu-generic-expression perl-imenu-generic-expression
)
335 (run-hooks 'perl-mode-hook
))
337 ;; This is used by indent-for-comment
338 ;; to decide how much to indent a comment in Perl code
339 ;; based on its context.
340 (defun perl-comment-indent ()
341 (if (and (bolp) (not (eolp)))
342 0 ;Existing comment at bol stays there.
344 (skip-chars-backward " \t")
345 (max (if (bolp) ;Else indent at comment column
346 0 ; except leave at least one space if
347 (1+ (current-column))) ; not at beginning of line.
350 (defun electric-perl-terminator (arg)
351 "Insert character and adjust indentation.
352 If at end-of-line, and not in a comment or a quote, correct the's indentation."
354 (let ((insertpos (point)))
355 (and (not arg
) ; decide whether to indent
359 (and (not ; eliminate comments quickly
360 (re-search-forward comment-start-skip insertpos t
))
361 (or (/= last-command-char ?
:)
362 ;; Colon is special only after a label ....
363 (looking-at "\\s-*\\(\\w\\|\\s_\\)+$"))
364 (let ((pps (parse-partial-sexp
365 (perl-beginning-of-function) insertpos
)))
366 (not (or (nth 3 pps
) (nth 4 pps
) (nth 5 pps
))))))
367 (progn ; must insert, indent, delete
368 (insert-char last-command-char
1)
371 (self-insert-command (prefix-numeric-value arg
)))
373 ;; not used anymore, but may be useful someday:
374 ;;(defun perl-inside-parens-p ()
375 ;; (condition-case ()
378 ;; (narrow-to-region (point)
379 ;; (perl-beginning-of-function))
380 ;; (goto-char (point-max))
381 ;; (= (char-after (or (scan-lists (point) -1 1) (point-min))) ?\()))
384 (defun perl-indent-command (&optional arg
)
385 "Indent current line as Perl code, or optionally, insert a tab character.
387 With an argument, indent the current line, regardless of other options.
389 If `perl-tab-always-indent' is nil and point is not in the indentation
390 area at the beginning of the line, simply insert a tab.
392 Otherwise, indent the current line. If point was within the indentation
393 area it is moved to the end of the indentation area. If the line was
394 already indented properly and point was not within the indentation area,
395 and if `perl-tab-to-comment' is non-nil (the default), then do the first
396 possible action from the following list:
398 1) delete an empty comment
399 2) move forward to start of comment, indenting if necessary
400 3) move forward to end of line
401 4) create an empty comment
402 5) move backward to start of comment, indenting if necessary."
404 (if arg
; If arg, just indent this line
405 (perl-indent-line "\f")
406 (if (and (not perl-tab-always-indent
)
407 (> (current-column) (current-indentation)))
409 (let (bof lsexp delta
(oldpnt (point)))
412 (setq bof
(perl-beginning-of-function))
414 (setq delta
(perl-indent-line "\f\\|;?#" bof
))
415 (and perl-tab-to-comment
416 (= oldpnt
(point)) ; done if point moved
417 (if (listp delta
) ; if line starts in a quoted string
418 (setq lsexp
(or (nth 2 delta
) bof
))
419 (= delta
0)) ; done if indenting occurred
423 (if (= (char-after bof
) ?
=)
425 (message "In a format statement"))
426 (setq state
(parse-partial-sexp lsexp eol
))
428 (if (= oldpnt eol
) ; already at eol in a string
429 (message "In a string which starts with a %c."
431 (if (not (nth 4 state
))
432 (if (= oldpnt eol
) ; no comment, create one?
433 (indent-for-comment))
435 (if (re-search-forward comment-start-skip eol
'move
)
437 (progn ; kill existing comment
438 (goto-char (match-beginning 0))
439 (skip-chars-backward " \t")
440 (kill-region (point) eol
))
441 (if (or (< oldpnt
(point)) (= oldpnt eol
))
442 (indent-for-comment) ; indent existing comment
446 (message "Use backslash to quote # characters.")
449 (defun perl-indent-line (&optional nochange parse-start
)
450 "Indent current line as Perl code.
451 Return the amount the indentation
452 changed by, or (parse-state) if line starts in a quoted string."
453 (let ((case-fold-search nil
)
454 (pos (- (point-max) (point)))
455 (bof (or parse-start
(save-excursion (perl-beginning-of-function))))
456 beg indent shift-amt
)
460 (cond ((= (char-after bof
) ?
=) 0)
461 ((listp (setq indent
(calculate-perl-indent bof
))) indent
)
462 ((looking-at (or nochange perl-nochange
)) 0)
464 (skip-chars-forward " \t\f")
465 (cond ((looking-at "\\(\\w\\|\\s_\\)+:")
466 (setq indent
(max 1 (+ indent perl-label-offset
))))
467 ((= (following-char) ?
})
468 (setq indent
(- indent perl-indent-level
)))
469 ((= (following-char) ?
{)
470 (setq indent
(+ indent perl-brace-offset
))))
471 (- indent
(current-column)))))
472 (skip-chars-forward " \t\f")
473 (if (and (numberp shift-amt
) (/= 0 shift-amt
))
474 (progn (delete-region beg
(point))
476 ;; If initial point was within line's indentation,
477 ;; position after the indentation. Else stay at same point in text.
478 (if (> (- (point-max) pos
) (point))
479 (goto-char (- (point-max) pos
)))
482 (defun calculate-perl-indent (&optional parse-start
)
483 "Return appropriate indentation for current line as Perl code.
484 In usual case returns an integer: the column to indent to.
485 Returns (parse-state) if line starts inside a string."
488 (let ((indent-point (point))
489 (case-fold-search nil
)
491 state containing-sexp
)
492 (if parse-start
;used to avoid searching
493 (goto-char parse-start
)
494 (perl-beginning-of-function))
495 (while (< (point) indent-point
) ;repeat until right sexp
496 (setq parse-start
(point))
497 (setq state
(parse-partial-sexp (point) indent-point
0))
498 ; state = (depth_in_parens innermost_containing_list last_complete_sexp
499 ; string_terminator_or_nil inside_commentp following_quotep
500 ; minimum_paren-depth_this_scan)
501 ; Parsing stops if depth in parentheses becomes equal to third arg.
502 (setq containing-sexp
(nth 1 state
)))
503 (cond ((nth 3 state
) state
) ; In a quoted string?
504 ((null containing-sexp
) ; Line is at top level.
505 (skip-chars-forward " \t\f")
506 (if (= (following-char) ?
{)
507 0 ; move to beginning of line if it starts a function body
508 ;; indent a little if this is a continuation line
509 (perl-backward-to-noncomment)
511 (memq (preceding-char) '(?\
; ?\})))
512 0 perl-continued-statement-offset
)))
513 ((/= (char-after containing-sexp
) ?
{)
514 ;; line is expression, not statement:
515 ;; indent to just after the surrounding open.
516 (goto-char (1+ containing-sexp
))
519 ;; Statement level. Is it a continuation or a new statement?
520 ;; Find previous non-comment character.
521 (perl-backward-to-noncomment)
522 ;; Back up over label lines, since they don't
523 ;; affect whether our line is a continuation.
524 (while (or (eq (preceding-char) ?\
,)
525 (and (eq (preceding-char) ?
:)
526 (memq (char-syntax (char-after (- (point) 2)))
528 (if (eq (preceding-char) ?\
,)
529 (perl-backward-to-start-of-continued-exp containing-sexp
)
531 (perl-backward-to-noncomment))
532 ;; Now we get the answer.
533 (if (not (memq (preceding-char) '(?\
; ?\} ?\{)))
534 ;; This line is continuation of preceding line's statement;
535 ;; indent perl-continued-statement-offset more than the
536 ;; previous line of the statement.
538 (perl-backward-to-start-of-continued-exp containing-sexp
)
539 (+ perl-continued-statement-offset
(current-column)
540 (if (save-excursion (goto-char indent-point
)
541 (looking-at "[ \t]*{"))
542 perl-continued-brace-offset
0)))
543 ;; This line starts a new statement.
544 ;; Position at last unclosed open.
545 (goto-char containing-sexp
)
547 ;; If open paren is in col 0, close brace is special
549 (save-excursion (goto-char indent-point
)
550 (looking-at "[ \t]*}"))
552 ;; Is line first statement after an open-brace?
553 ;; If no, find that first statement and indent like it.
556 ;; Skip over comments and labels following openbrace.
558 (skip-chars-forward " \t\f\n")
559 (cond ((looking-at ";?#")
561 ((looking-at "\\(\\w\\|\\s_\\)+:")
564 (setq colon-line-end
(point)))
565 (search-forward ":")))))
566 ;; The first following code counts
567 ;; if it is before the line we want to indent.
568 (and (< (point) indent-point
)
569 (if (> colon-line-end
(point))
570 (- (current-indentation) perl-label-offset
)
572 ;; If no previous statement,
573 ;; indent it relative to line brace is on.
574 ;; For open paren in column zero, don't let statement
575 ;; start there too. If perl-indent-level is zero,
576 ;; use perl-brace-offset + perl-continued-statement-offset
577 ;; For open-braces not the first thing in a line,
578 ;; add in perl-brace-imaginary-offset.
579 (+ (if (and (bolp) (zerop perl-indent-level
))
580 (+ perl-brace-offset perl-continued-statement-offset
)
582 ;; Move back over whitespace before the openbrace.
583 ;; If openbrace is not first nonwhite thing on the line,
584 ;; add the perl-brace-imaginary-offset.
585 (progn (skip-chars-backward " \t")
586 (if (bolp) 0 perl-brace-imaginary-offset
))
587 ;; If the openbrace is preceded by a parenthesized exp,
588 ;; move to the beginning of that;
589 ;; possibly a different line
591 (if (eq (preceding-char) ?\
))
593 ;; Get initial indentation of the line we are on.
594 (current-indentation))))))))))
596 (defun perl-backward-to-noncomment ()
597 "Move point backward to after the first non-white-space, skipping comments."
601 (setq opoint
(point))
603 (if (re-search-forward comment-start-skip opoint
'move
1)
604 (progn (goto-char (match-end 1))
605 (skip-chars-forward ";")))
606 (skip-chars-backward " \t\f")
607 (setq stop
(or (bobp)
609 (forward-char -
1))))))
611 (defun perl-backward-to-start-of-continued-exp (lim)
612 (if (= (preceding-char) ?\
))
616 (goto-char (1+ lim
)))
617 (skip-chars-forward " \t\f"))
619 ;; note: this may be slower than the c-mode version, but I can understand it.
620 (defun indent-perl-exp ()
621 "Indent each line of the Perl grouping following point."
623 (let* ((case-fold-search nil
)
624 (oldpnt (point-marker))
625 (bof-mark (save-excursion
627 (perl-beginning-of-function)
629 eol last-mark lsexp-mark delta
)
630 (if (= (char-after (marker-position bof-mark
)) ?
=)
631 (message "Can't indent a format statement")
632 (message "Indenting Perl expression...")
633 (save-excursion (end-of-line) (setq eol
(point)))
634 (save-excursion ; locate matching close paren
635 (while (and (not (eobp)) (<= (point) eol
))
636 (parse-partial-sexp (point) (point-max) 0))
637 (setq last-mark
(point-marker)))
638 (setq lsexp-mark bof-mark
)
640 (while (< (point) (marker-position last-mark
))
641 (setq delta
(perl-indent-line nil
(marker-position bof-mark
)))
642 (if (numberp delta
) ; unquoted start-of-line?
645 (delete-horizontal-space))
646 (setq lsexp-mark
(point-marker))))
649 (if (nth 4 (parse-partial-sexp (marker-position lsexp-mark
) eol
))
650 (progn ; line ends in a comment
652 (if (or (not (looking-at "\\s-*;?#"))
655 (= (- (current-indentation) delta
) comment-column
)))
656 (if (re-search-forward comment-start-skip eol t
)
657 (indent-for-comment))))) ; indent existing comment
659 (goto-char (marker-position oldpnt
))
660 (message "Indenting Perl expression...done"))))
662 (defun perl-beginning-of-function (&optional arg
)
663 "Move backward to next beginning-of-function, or as far as possible.
664 With argument, repeat that many times; negative args move forward.
665 Returns new value of point in all cases."
667 (or arg
(setq arg
1))
668 (if (< arg
0) (forward-char 1))
670 (re-search-backward "^\\s(\\|^\\s-*sub\\b[^{]+{\\|^\\s-*format\\b[^=]*=\\|^\\."
672 (goto-char (1- (match-end 0))))
675 ;; note: this routine is adapted directly from emacs lisp.el, end-of-defun;
676 ;; no bugs have been removed :-)
677 (defun perl-end-of-function (&optional arg
)
678 "Move forward to next end-of-function.
679 The end of a function is found by moving forward from the beginning of one.
680 With argument, repeat that many times; negative args move backward."
682 (or arg
(setq arg
1))
684 (while (and (> arg
0) (< (point) (point-max)))
685 (let ((pos (point)) npos
)
690 (perl-beginning-of-function 1)
693 (or (bobp) (forward-char -
1))
694 (perl-beginning-of-function -
1))
697 (skip-chars-forward " \t")
698 (if (looking-at "[#\n]")
704 (perl-beginning-of-function 1)
708 (if (progn (perl-beginning-of-function 2) (not (bobp)))
711 (skip-chars-forward " \t")
712 (if (looking-at "[#\n]")
714 (goto-char (point-min)))))
715 (setq arg
(1+ arg
)))))
717 (defun mark-perl-function ()
718 "Put mark at end of Perl function, point at beginning."
721 (perl-end-of-function)
723 (perl-beginning-of-function)
724 (backward-paragraph))
726 ;;;;;;;; That's all, folks! ;;;;;;;;;