;;; perl-mode.el --- Perl code editing commands for GNU Emacs
-;; Copyright (C) 1990 Free Software Foundation, Inc.
+;; Copyright (C) 1990, 1994, 2001, 2002, 2003, 2004, 2005, 2006
+;; Free Software Foundation, Inc.
;; Author: William F. Mann
+;; Maintainer: FSF
;; Adapted-By: ESR
;; Keywords: languages
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
-;; along with GNU Emacs; see the file COPYING. If not, write to
-;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+;; along with GNU Emacs; see the file COPYING. If not, write to the
+;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
;;; Commentary:
;; To enter perl-mode automatically, add (autoload 'perl-mode "perl-mode")
;; to your .emacs file and change the first line of your perl script to:
;; #!/usr/bin/perl -- # -*-Perl-*-
-;; With argments to perl:
+;; With arguments to perl:
;; #!/usr/bin/perl -P- # -*-Perl-*-
;; To handle files included with do 'filename.pl';, add something like
-;; (setq auto-mode-alist (append (list (cons "\\.pl$" 'perl-mode))
+;; (setq auto-mode-alist (append (list (cons "\\.pl\\'" 'perl-mode))
;; auto-mode-alist))
;; to your .emacs file; otherwise the .pl suffix defaults to prolog-mode.
;; the line ends in a quoted string, or has a # which should be a \#.
;; If your machine is slow, you may want to remove some of the bindings
-;; to electric-perl-terminator. I changed the indenting defaults to be
+;; to perl-electric-terminator. I changed the indenting defaults to be
;; what Larry Wall uses in perl/lib, but left in all the options.
;; I also tuned a few things: comments and labels starting in column
-;; zero are left there by indent-perl-exp; perl-beginning-of-function
+;; zero are left there by perl-indent-exp; perl-beginning-of-function
;; goes back to the first open brace/paren in column zero, the open brace
-;; in 'sub ... {', or the equal sign in 'format ... ='; indent-perl-exp
+;; in 'sub ... {', or the equal sign in 'format ... ='; perl-indent-exp
;; (meta-^q) indents from the current line through the close of the next
;; brace/paren, so you don't need to start exactly at a brace or paren.
;; Known problems (these are all caused by limitations in the Emacs Lisp
;; parsing routine (parse-partial-sexp), which was not designed for such
;; a rich language; writing a more suitable parser would be a big job):
+;; 2) The globbing syntax <pattern> is not recognized, so special
+;; characters in the pattern string must be backslashed.
+;; 3) The << quoting operators are not recognized; see below.
+;; 5) To make '$' work correctly, $' is not recognized as a variable.
+;; Use "$'" or $POSTMATCH instead.
+;;
+;; If you don't use font-lock, additional problems will appear:
;; 1) Regular expression delimiters do not act as quotes, so special
;; characters such as `'"#:;[](){} may need to be backslashed
;; in regular expressions and in both parts of s/// and tr///.
-;; 2) The globbing syntax <pattern> is not recognized, so special
-;; characters in the pattern string must be backslashed.
-;; 3) The q, qq, and << quoting operators are not recognized; see below.
-;; 4) \ (backslash) always quotes the next character, so '\' is
-;; treated as the start of a string. Use "\\" as a work-around.
+;; 4) The q and qq quoting operators are not recognized; see below.
;; 5) To make variables such a $' and $#array work, perl-mode treats
-;; $ just like backslash, so '$' is the same as problem 5.
+;; $ just like backslash, so '$' is not treated correctly.
;; 6) Unfortunately, treating $ like \ makes ${var} be treated as an
;; unmatched }. See below.
;; 7) When ' (quote) is used as a package name separator, perl-mode
;;
;; /`/; $ugly = q?"'$?; /`/;
;;
-;; To solve problem 6, add a /{/; before each use of ${var}:
-;; /{/; while (<${glob_me}>) ...
+;; The same trick can be used for problem 6 as in:
+;; /{/; while (<${glob_me}>)
+;; but a simpler solution is to add a space between the $ and the {:
+;; while (<$ {glob_me}>)
;;
;; Problem 7 is even worse, but this 'fix' does work :-(
;; $DB'stop#'
;;; Code:
+(eval-when-compile (require 'cl))
+
+(defvar font-lock-comment-face)
+(defvar font-lock-doc-face)
+(defvar font-lock-string-face)
+
+(defgroup perl nil
+ "Major mode for editing Perl code."
+ :link '(custom-group-link :tag "Font Lock Faces group" font-lock-faces)
+ :prefix "perl-"
+ :group 'languages)
+
(defvar perl-mode-abbrev-table nil
"Abbrev table in use in perl-mode buffers.")
(define-abbrev-table 'perl-mode-abbrev-table ())
-(defvar perl-mode-map ()
+(defvar perl-mode-map
+ (let ((map (make-sparse-keymap)))
+ (define-key map "{" 'perl-electric-terminator)
+ (define-key map "}" 'perl-electric-terminator)
+ (define-key map ";" 'perl-electric-terminator)
+ (define-key map ":" 'perl-electric-terminator)
+ (define-key map "\e\C-a" 'perl-beginning-of-function)
+ (define-key map "\e\C-e" 'perl-end-of-function)
+ (define-key map "\e\C-h" 'perl-mark-function)
+ (define-key map "\e\C-q" 'perl-indent-exp)
+ (define-key map "\177" 'backward-delete-char-untabify)
+ (define-key map "\t" 'perl-indent-command)
+ map)
"Keymap used in Perl mode.")
-(if perl-mode-map
- ()
- (setq perl-mode-map (make-sparse-keymap))
- (define-key perl-mode-map "{" 'electric-perl-terminator)
- (define-key perl-mode-map "}" 'electric-perl-terminator)
- (define-key perl-mode-map ";" 'electric-perl-terminator)
- (define-key perl-mode-map ":" 'electric-perl-terminator)
- (define-key perl-mode-map "\e\C-a" 'perl-beginning-of-function)
- (define-key perl-mode-map "\e\C-e" 'perl-end-of-function)
- (define-key perl-mode-map "\e\C-h" 'mark-perl-function)
- (define-key perl-mode-map "\e\C-q" 'indent-perl-exp)
- (define-key perl-mode-map "\177" 'backward-delete-char-untabify)
- (define-key perl-mode-map "\t" 'perl-indent-command))
(autoload 'c-macro-expand "cmacexp"
"Display the result of expanding all C macros occurring in the region.
The expansion is entirely correct because it uses the C preprocessor."
t)
-(defvar perl-mode-syntax-table nil
- "Syntax table in use in perl-mode buffers.")
-
-(if perl-mode-syntax-table
- ()
- (setq perl-mode-syntax-table (make-syntax-table (standard-syntax-table)))
- (modify-syntax-entry ?\n ">" perl-mode-syntax-table)
- (modify-syntax-entry ?# "<" perl-mode-syntax-table)
- (modify-syntax-entry ?$ "/" perl-mode-syntax-table)
- (modify-syntax-entry ?% "." perl-mode-syntax-table)
- (modify-syntax-entry ?& "." perl-mode-syntax-table)
- (modify-syntax-entry ?\' "\"" perl-mode-syntax-table)
- (modify-syntax-entry ?* "." perl-mode-syntax-table)
- (modify-syntax-entry ?+ "." perl-mode-syntax-table)
- (modify-syntax-entry ?- "." perl-mode-syntax-table)
- (modify-syntax-entry ?/ "." perl-mode-syntax-table)
- (modify-syntax-entry ?< "." perl-mode-syntax-table)
- (modify-syntax-entry ?= "." perl-mode-syntax-table)
- (modify-syntax-entry ?> "." perl-mode-syntax-table)
- (modify-syntax-entry ?\\ "\\" perl-mode-syntax-table)
- (modify-syntax-entry ?` "\"" perl-mode-syntax-table)
- (modify-syntax-entry ?| "." perl-mode-syntax-table)
-)
-
-(defconst perl-indent-level 4
- "*Indentation of Perl statements with respect to containing block.")
-(defconst perl-continued-statement-offset 4
- "*Extra indent for lines not starting new statements.")
-(defconst perl-continued-brace-offset -4
+(defvar perl-mode-syntax-table
+ (let ((st (make-syntax-table (standard-syntax-table))))
+ (modify-syntax-entry ?\n ">" st)
+ (modify-syntax-entry ?# "<" st)
+ ;; `$' is also a prefix char so I was tempted to say "/ p",
+ ;; but the `p' thingy basically overrides the `/' :-( --stef
+ (modify-syntax-entry ?$ "/" st)
+ (modify-syntax-entry ?% ". p" st)
+ (modify-syntax-entry ?@ ". p" st)
+ (modify-syntax-entry ?& "." st)
+ (modify-syntax-entry ?\' "\"" st)
+ (modify-syntax-entry ?* "." st)
+ (modify-syntax-entry ?+ "." st)
+ (modify-syntax-entry ?- "." st)
+ (modify-syntax-entry ?/ "." st)
+ (modify-syntax-entry ?< "." st)
+ (modify-syntax-entry ?= "." st)
+ (modify-syntax-entry ?> "." st)
+ (modify-syntax-entry ?\\ "\\" st)
+ (modify-syntax-entry ?` "\"" st)
+ (modify-syntax-entry ?| "." st)
+ st)
+ "Syntax table in use in `perl-mode' buffers.")
+
+(defvar perl-imenu-generic-expression
+ '(;; Functions
+ (nil "^sub\\s-+\\([-A-Za-z0-9+_:]+\\)" 1)
+ ;;Variables
+ ("Variables" "^\\([$@%][-A-Za-z0-9+_:]+\\)\\s-*=" 1)
+ ("Packages" "^package\\s-+\\([-A-Za-z0-9+_:]+\\);" 1)
+ ("Doc sections" "^=head[0-9][ \t]+\\(.*\\)" 1))
+ "Imenu generic expression for Perl mode. See `imenu-generic-expression'.")
+
+;; Regexps updated with help from Tom Tromey <tromey@cambric.colorado.edu> and
+;; Jim Campbell <jec@murzim.ca.boeing.com>.
+
+(defconst perl-font-lock-keywords-1
+ '(;; What is this for?
+ ;;("\\(--- .* ---\\|=== .* ===\\)" . font-lock-string-face)
+ ;;
+ ;; Fontify preprocessor statements as we do in `c-font-lock-keywords'.
+ ;; Ilya Zakharevich <ilya@math.ohio-state.edu> thinks this is a bad idea.
+ ;; ("^#[ \t]*include[ \t]+\\(<[^>\"\n]+>\\)" 1 font-lock-string-face)
+ ;; ("^#[ \t]*define[ \t]+\\(\\sw+\\)(" 1 font-lock-function-name-face)
+ ;; ("^#[ \t]*if\\>"
+ ;; ("\\<\\(defined\\)\\>[ \t]*(?\\(\\sw+\\)?" nil nil
+ ;; (1 font-lock-constant-face) (2 font-lock-variable-name-face nil t)))
+ ;; ("^#[ \t]*\\(\\sw+\\)\\>[ \t]*\\(\\sw+\\)?"
+ ;; (1 font-lock-constant-face) (2 font-lock-variable-name-face nil t))
+ ;;
+ ;; Fontify function and package names in declarations.
+ ("\\<\\(package\\|sub\\)\\>[ \t]*\\(\\sw+\\)?"
+ (1 font-lock-keyword-face) (2 font-lock-function-name-face nil t))
+ ("\\<\\(import\\|no\\|require\\|use\\)\\>[ \t]*\\(\\sw+\\)?"
+ (1 font-lock-keyword-face) (2 font-lock-constant-face nil t)))
+ "Subdued level highlighting for Perl mode.")
+
+(defconst perl-font-lock-keywords-2
+ (append perl-font-lock-keywords-1
+ (list
+ ;;
+ ;; Fontify keywords, except those fontified otherwise.
+ (concat "\\<"
+ (regexp-opt '("if" "until" "while" "elsif" "else" "unless"
+ "do" "dump" "for" "foreach" "exit" "die"
+ "BEGIN" "END" "return" "exec" "eval") t)
+ "\\>")
+ ;;
+ ;; Fontify local and my keywords as types.
+ '("\\<\\(local\\|my\\)\\>" . font-lock-type-face)
+ ;;
+ ;; Fontify function, variable and file name references.
+ '("&\\(\\sw+\\(::\\sw+\\)*\\)" 1 font-lock-function-name-face)
+ ;; Additionally underline non-scalar variables. Maybe this is a bad idea.
+ ;;'("[$@%*][#{]?\\(\\sw+\\)" 1 font-lock-variable-name-face)
+ '("[$*]{?\\(\\sw+\\(::\\sw+\\)*\\)" 1 font-lock-variable-name-face)
+ '("\\([@%]\\|\\$#\\)\\(\\sw+\\(::\\sw+\\)*\\)"
+ (2 (cons font-lock-variable-name-face '(underline))))
+ '("<\\(\\sw+\\)>" 1 font-lock-constant-face)
+ ;;
+ ;; Fontify keywords with/and labels as we do in `c++-font-lock-keywords'.
+ '("\\<\\(continue\\|goto\\|last\\|next\\|redo\\)\\>[ \t]*\\(\\sw+\\)?"
+ (1 font-lock-keyword-face) (2 font-lock-constant-face nil t))
+ '("^[ \t]*\\(\\sw+\\)[ \t]*:[^:]" 1 font-lock-constant-face)))
+ "Gaudy level highlighting for Perl mode.")
+
+(defvar perl-font-lock-keywords perl-font-lock-keywords-1
+ "Default expressions to highlight in Perl mode.")
+
+(defvar perl-quote-like-pairs
+ '((?\( . ?\)) (?\[ . ?\]) (?\{ . ?\}) (?\< . ?\>)))
+
+;; FIXME: handle here-docs and regexps.
+;; <<EOF <<"EOF" <<'EOF' (no space)
+;; see `man perlop'
+;; ?...?
+;; /.../
+;; m [...]
+;; m /.../
+;; q /.../ = '...'
+;; qq /.../ = "..."
+;; qx /.../ = `...`
+;; qr /.../ = precompiled regexp =~=~ m/.../
+;; qw /.../
+;; s /.../.../
+;; s <...> /.../
+;; s '...'...'
+;; tr /.../.../
+;; y /.../.../
+;;
+;; <file*glob>
+(defvar perl-font-lock-syntactic-keywords
+ ;; TODO: here-documents ("<<\\(\\sw\\|['\"]\\)")
+ '(;; Turn POD into b-style comments
+ ("^\\(=\\)\\sw" (1 "< b"))
+ ("^=cut[ \t]*\\(\n\\)" (1 "> b"))
+ ;; Catch ${ so that ${var} doesn't screw up indentation.
+ ;; This also catches $' to handle 'foo$', although it should really
+ ;; check that it occurs inside a '..' string.
+ ("\\(\\$\\)[{']" (1 ". p"))
+ ;; Handle funny names like $DB'stop.
+ ("\\$ ?{?^?[_a-zA-Z][_a-zA-Z0-9]*\\('\\)[_a-zA-Z]" (1 "_"))
+ ;; format statements
+ ("^[ \t]*format.*=[ \t]*\\(\n\\)" (1 '(7)))
+ ;; Funny things in sub arg specifications like `sub myfunc ($$)'
+ ("\\<sub\\s-+\\S-+\\s-*(\\([^)]+\\))" 1 '(1))
+ ;; regexp and funny quotes
+ ("[?:.,;=!~({[][ \t\n]*\\(/\\)" (1 '(7)))
+ ("\\(^\\|[?:.,;=!~({[ \t]\\)\\([msy]\\|q[qxrw]?\\|tr\\)\\>\\s-*\\([^])}> \n\t]\\)"
+ ;; Nasty cases:
+ ;; /foo/m $a->m $#m $m @m %m
+ ;; \s (appears often in regexps).
+ ;; -s file
+ (3 (if (assoc (char-after (match-beginning 3))
+ perl-quote-like-pairs)
+ '(15) '(7))))
+ ;; Find and mark the end of funny quotes and format statements.
+ (perl-font-lock-special-syntactic-constructs)
+ ))
+
+(defvar perl-empty-syntax-table
+ (let ((st (copy-syntax-table)))
+ ;; Make all chars be of punctuation syntax.
+ (dotimes (i 256) (aset st i '(1)))
+ (modify-syntax-entry ?\\ "\\" st)
+ st)
+ "Syntax table used internally for processing quote-like operators.")
+
+(defun perl-quote-syntax-table (char)
+ (let ((close (cdr (assq char perl-quote-like-pairs)))
+ (st (copy-syntax-table perl-empty-syntax-table)))
+ (if (not close)
+ (modify-syntax-entry char "\"" st)
+ (modify-syntax-entry char "(" st)
+ (modify-syntax-entry close ")" st))
+ st))
+
+(defun perl-font-lock-special-syntactic-constructs (limit)
+ ;; We used to do all this in a font-lock-syntactic-face-function, which
+ ;; did not work correctly because sometimes some parts of the buffer are
+ ;; treated with font-lock-syntactic-keywords but not with
+ ;; font-lock-syntactic-face-function (mostly because of
+ ;; font-lock-syntactically-fontified). That meant that some syntax-table
+ ;; properties were missing. So now we do the parse-partial-sexp loop
+ ;; ourselves directly from font-lock-syntactic-keywords, so we're sure
+ ;; it's done when necessary.
+ (let ((state (syntax-ppss))
+ char)
+ (while (< (point) limit)
+ (cond
+ ((or (null (setq char (nth 3 state)))
+ (and (char-valid-p char) (eq (char-syntax (nth 3 state)) ?\")))
+ ;; Normal text, or comment, or docstring, or normal string.
+ nil)
+ ((eq (nth 3 state) ?\n)
+ ;; A `format' command.
+ (save-excursion
+ (when (and (re-search-forward "^\\s *\\.\\s *$" nil t)
+ (not (eobp)))
+ (put-text-property (point) (1+ (point)) 'syntax-table '(7)))))
+ (t
+ ;; This is regexp like quote thingy.
+ (setq char (char-after (nth 8 state)))
+ (save-excursion
+ (let ((twoargs (save-excursion
+ (goto-char (nth 8 state))
+ (skip-syntax-backward " ")
+ (skip-syntax-backward "w")
+ (member (buffer-substring
+ (point) (progn (forward-word 1) (point)))
+ '("tr" "s" "y"))))
+ (close (cdr (assq char perl-quote-like-pairs)))
+ (pos (point))
+ (st (perl-quote-syntax-table char)))
+ (if (not close)
+ ;; The closing char is the same as the opening char.
+ (with-syntax-table st
+ (parse-partial-sexp (point) (point-max)
+ nil nil state 'syntax-table)
+ (when twoargs
+ (parse-partial-sexp (point) (point-max)
+ nil nil state 'syntax-table)))
+ ;; The open/close chars are matched like () [] {} and <>.
+ (let ((parse-sexp-lookup-properties nil))
+ (condition-case err
+ (progn
+ (with-syntax-table st
+ (goto-char (nth 8 state)) (forward-sexp 1))
+ (when twoargs
+ (save-excursion
+ ;; Skip whitespace and make sure that font-lock will
+ ;; refontify the second part in the proper context.
+ (put-text-property
+ (point) (progn (forward-comment (point-max)) (point))
+ 'font-lock-multiline t)
+ ;;
+ (unless
+ (save-excursion
+ (with-syntax-table
+ (perl-quote-syntax-table (char-after))
+ (forward-sexp 1))
+ (put-text-property pos (line-end-position)
+ 'jit-lock-defer-multiline t)
+ (looking-at "\\s-*\\sw*e"))
+ (put-text-property (point) (1+ (point))
+ 'syntax-table
+ (if (assoc (char-after)
+ perl-quote-like-pairs)
+ '(15) '(7)))))))
+ ;; The arg(s) is not terminated, so it extends until EOB.
+ (scan-error (goto-char (point-max))))))
+ ;; Point is now right after the arg(s).
+ ;; Erase any syntactic marks within the quoted text.
+ (put-text-property pos (1- (point)) 'syntax-table nil)
+ (when (eq (char-before (1- (point))) ?$)
+ (put-text-property (- (point) 2) (1- (point))
+ 'syntax-table '(1)))
+ (put-text-property (1- (point)) (point)
+ 'syntax-table (if close '(15) '(7)))))))
+
+ (setq state (parse-partial-sexp (point) limit nil nil state
+ 'syntax-table))))
+ ;; Tell font-lock that this needs not further processing.
+ nil)
+
+
+(defcustom perl-indent-level 4
+ "*Indentation of Perl statements with respect to containing block."
+ :type 'integer
+ :group 'perl)
+(defcustom perl-continued-statement-offset 4
+ "*Extra indent for lines not starting new statements."
+ :type 'integer
+ :group 'perl)
+(defcustom perl-continued-brace-offset -4
"*Extra indent for substatements that start with open-braces.
-This is in addition to perl-continued-statement-offset.")
-(defconst perl-brace-offset 0
- "*Extra indentation for braces, compared with other text in same context.")
-(defconst perl-brace-imaginary-offset 0
- "*Imagined indentation of an open brace that actually follows a statement.")
-(defconst perl-label-offset -2
- "*Offset of Perl label lines relative to usual indentation.")
-
-(defconst perl-tab-always-indent t
- "*Non-nil means TAB in Perl mode should always indent the current line,
-regardless of where in the line point is when the TAB command is used.")
-
-(defconst perl-tab-to-comment t
- "*Non-nil means that for lines which don't need indenting, TAB will
-either indent an existing comment, move to end-of-line, or if at end-of-line
-already, create a new comment.")
-
-(defconst perl-nochange ";?#\\|\f\\|\\s(\\|\\(\\w\\|\\s_\\)+:"
- "*Lines starting with this regular expression will not be auto-indented.")
+This is in addition to `perl-continued-statement-offset'."
+ :type 'integer
+ :group 'perl)
+(defcustom perl-brace-offset 0
+ "*Extra indentation for braces, compared with other text in same context."
+ :type 'integer
+ :group 'perl)
+(defcustom perl-brace-imaginary-offset 0
+ "*Imagined indentation of an open brace that actually follows a statement."
+ :type 'integer
+ :group 'perl)
+(defcustom perl-label-offset -2
+ "*Offset of Perl label lines relative to usual indentation."
+ :type 'integer
+ :group 'perl)
+(defcustom perl-indent-continued-arguments nil
+ "*If non-nil offset of argument lines relative to usual indentation.
+If nil, continued arguments are aligned with the first argument."
+ :type '(choice integer (const nil))
+ :group 'perl)
+
+(defcustom perl-tab-always-indent tab-always-indent
+ "Non-nil means TAB in Perl mode always indents the current line.
+Otherwise it inserts a tab character if you type it past the first
+nonwhite character on the line."
+ :type 'boolean
+ :group 'perl)
+
+;; I changed the default to nil for consistency with general Emacs
+;; conventions -- rms.
+(defcustom perl-tab-to-comment nil
+ "*Non-nil means TAB moves to eol or makes a comment in some cases.
+For lines which don't need indenting, TAB either indents an
+existing comment, moves to end-of-line, or if at end-of-line already,
+create a new comment."
+ :type 'boolean
+ :group 'perl)
+
+(defcustom perl-nochange ";?#\\|\f\\|\\s(\\|\\(\\w\\|\\s_\\)+:[^:]"
+ "*Lines starting with this regular expression are not auto-indented."
+ :type 'regexp
+ :group 'perl)
+
+;; Outline support
+
+(defvar perl-outline-regexp
+ (concat (mapconcat 'cadr perl-imenu-generic-expression "\\|")
+ "\\|^=cut\\>"))
+
+(defun perl-outline-level ()
+ (cond
+ ((looking-at "package\\s-") 0)
+ ((looking-at "sub\\s-") 1)
+ ((looking-at "=head[0-9]") (- (char-before (match-end 0)) ?0))
+ ((looking-at "=cut") 1)
+ (t 3)))
\f
+(defvar perl-mode-hook nil
+ "Normal hook to run when entering Perl mode.")
+
+;;;###autoload
(defun perl-mode ()
"Major mode for editing Perl code.
Expression and list commands understand all Perl brackets.
Delete converts tabs to spaces as it moves back.
\\{perl-mode-map}
Variables controlling indentation style:
- perl-tab-always-indent
+ `perl-tab-always-indent'
Non-nil means TAB in Perl mode should always indent the current line,
regardless of where in the line point is when the TAB command is used.
- perl-tab-to-comment
+ `perl-tab-to-comment'
Non-nil means that for lines which don't need indenting, TAB will
- either delete an empty comment, indent an existing comment, move
+ either delete an empty comment, indent an existing comment, move
to end-of-line, or if at end-of-line already, create a new comment.
- perl-nochange
- Lines starting with this regular expression will not be auto-indented.
- perl-indent-level
+ `perl-nochange'
+ Lines starting with this regular expression are not auto-indented.
+ `perl-indent-level'
Indentation of Perl statements within surrounding block.
The surrounding block's indentation is the indentation
of the line on which the open-brace appears.
- perl-continued-statement-offset
+ `perl-continued-statement-offset'
Extra indentation given to a substatement, such as the
then-clause of an if or body of a while.
- perl-continued-brace-offset
+ `perl-continued-brace-offset'
Extra indentation given to a brace that starts a substatement.
- This is in addition to perl-continued-statement-offset.
- perl-brace-offset
+ This is in addition to `perl-continued-statement-offset'.
+ `perl-brace-offset'
Extra indentation for line if it starts with an open brace.
- perl-brace-imaginary-offset
+ `perl-brace-imaginary-offset'
An open brace following other text is treated as if it were
this far to the right of the start of its line.
- perl-label-offset
+ `perl-label-offset'
Extra indentation for line that is a label.
+ `perl-indent-continued-arguments'
+ Offset of argument lines relative to usual indentation.
Various indentation styles: K&R BSD BLK GNU LW
perl-indent-level 5 8 0 2 4
perl-brace-imaginary-offset 0 0 4 0 0
perl-label-offset -5 -8 -2 -2 -2
-Turning on Perl mode calls the value of the variable perl-mode-hook with no
-args, if that value is non-nil."
+Turning on Perl mode runs the normal hook `perl-mode-hook'."
(interactive)
(kill-all-local-variables)
(use-local-map perl-mode-map)
(setq local-abbrev-table perl-mode-abbrev-table)
(set-syntax-table perl-mode-syntax-table)
(make-local-variable 'paragraph-start)
- (setq paragraph-start (concat "^$\\|" page-delimiter))
+ (setq paragraph-start (concat "$\\|" page-delimiter))
(make-local-variable 'paragraph-separate)
(setq paragraph-separate paragraph-start)
(make-local-variable 'paragraph-ignore-fill-prefix)
(make-local-variable 'indent-line-function)
(setq indent-line-function 'perl-indent-line)
(make-local-variable 'require-final-newline)
- (setq require-final-newline t)
+ (setq require-final-newline mode-require-final-newline)
(make-local-variable 'comment-start)
(setq comment-start "# ")
(make-local-variable 'comment-end)
(setq comment-end "")
- (make-local-variable 'comment-column)
- (setq comment-column 32)
(make-local-variable 'comment-start-skip)
(setq comment-start-skip "\\(^\\|\\s-\\);?#+ *")
(make-local-variable 'comment-indent-function)
(setq comment-indent-function 'perl-comment-indent)
(make-local-variable 'parse-sexp-ignore-comments)
- (setq parse-sexp-ignore-comments nil)
- (run-hooks 'perl-mode-hook))
+ (setq parse-sexp-ignore-comments t)
+ ;; Tell font-lock.el how to handle Perl.
+ (setq font-lock-defaults '((perl-font-lock-keywords
+ perl-font-lock-keywords-1
+ perl-font-lock-keywords-2)
+ nil nil ((?\_ . "w")) nil
+ (font-lock-syntactic-keywords
+ . perl-font-lock-syntactic-keywords)
+ (parse-sexp-lookup-properties . t)))
+ ;; Tell imenu how to handle Perl.
+ (set (make-local-variable 'imenu-generic-expression)
+ perl-imenu-generic-expression)
+ (setq imenu-case-fold-search nil)
+ ;; Setup outline-minor-mode.
+ (set (make-local-variable 'outline-regexp) perl-outline-regexp)
+ (set (make-local-variable 'outline-level) 'perl-outline-level)
+ (run-mode-hooks 'perl-mode-hook))
\f
;; This is used by indent-for-comment
;; to decide how much to indent a comment in Perl code
(defun perl-comment-indent ()
(if (and (bolp) (not (eolp)))
0 ;Existing comment at bol stays there.
- (save-excursion
- (skip-chars-backward " \t")
- (max (1+ (current-column)) ;Else indent at comment column
- comment-column)))) ; except leave at least one space.
-
-(defun electric-perl-terminator (arg)
- "Insert character. If at end-of-line, and not in a comment or a quote,
-correct the line's indentation."
+ comment-column))
+
+(defalias 'electric-perl-terminator 'perl-electric-terminator)
+(defun perl-electric-terminator (arg)
+ "Insert character and adjust indentation.
+If at end-of-line, and not in a comment or a quote, correct the's indentation."
(interactive "P")
(let ((insertpos (point)))
(and (not arg) ; decide whether to indent
(save-excursion
(beginning-of-line)
(and (not ; eliminate comments quickly
- (re-search-forward comment-start-skip insertpos t))
+ (and comment-start-skip
+ (re-search-forward comment-start-skip insertpos t)) )
(or (/= last-command-char ?:)
;; Colon is special only after a label ....
(looking-at "\\s-*\\(\\w\\|\\s_\\)+$"))
- (let ((pps (parse-partial-sexp
+ (let ((pps (parse-partial-sexp
(perl-beginning-of-function) insertpos)))
(not (or (nth 3 pps) (nth 4 pps) (nth 5 pps))))))
(progn ; must insert, indent, delete
With an argument, indent the current line, regardless of other options.
-If perl-tab-always-indent is nil and point is not in the indentation
+If `perl-tab-always-indent' is nil and point is not in the indentation
area at the beginning of the line, simply insert a tab.
Otherwise, indent the current line. If point was within the indentation
area it is moved to the end of the indentation area. If the line was
already indented properly and point was not within the indentation area,
-and if perl-tab-to-comment is non-nil (the default), then do the first
+and if `perl-tab-to-comment' is non-nil (the default), then do the first
possible action from the following list:
1) delete an empty comment
(if arg ; If arg, just indent this line
(perl-indent-line "\f")
(if (and (not perl-tab-always-indent)
- (<= (current-column) (current-indentation)))
+ (> (current-column) (current-indentation)))
(insert-tab)
- (let (bof lsexp delta (oldpnt (point)))
- (beginning-of-line)
- (setq lsexp (point))
- (setq bof (perl-beginning-of-function))
- (goto-char oldpnt)
- (setq delta (perl-indent-line "\f\\|;?#" bof))
+ (let* ((oldpnt (point))
+ (lsexp (progn (beginning-of-line) (point)))
+ (bof (perl-beginning-of-function))
+ (delta (progn
+ (goto-char oldpnt)
+ (perl-indent-line "\f\\|;?#" bof))))
(and perl-tab-to-comment
(= oldpnt (point)) ; done if point moved
(if (listp delta) ; if line starts in a quoted string
(setq lsexp (or (nth 2 delta) bof))
(= delta 0)) ; done if indenting occurred
- (let (eol state)
- (end-of-line)
- (setq eol (point))
+ (let ((eol (progn (end-of-line) (point)))
+ state)
(if (= (char-after bof) ?=)
(if (= oldpnt eol)
- (message "In a format statement"))
+ (message "In a format statement"))
(setq state (parse-partial-sexp lsexp eol))
(if (nth 3 state)
(if (= oldpnt eol) ; already at eol in a string
(if (= oldpnt eol) ; no comment, create one?
(indent-for-comment))
(beginning-of-line)
- (if (re-search-forward comment-start-skip eol 'move)
+ (if (and comment-start-skip
+ (re-search-forward comment-start-skip eol 'move))
(if (eolp)
(progn ; kill existing comment
(goto-char (match-beginning 0))
(ding t))))))))))))
(defun perl-indent-line (&optional nochange parse-start)
- "Indent current line as Perl code. Return the amount the indentation
+ "Indent current line as Perl code.
+Return the amount the indentation
changed by, or (parse-state) if line starts in a quoted string."
(let ((case-fold-search nil)
(pos (- (point-max) (point)))
(beginning-of-line)
(setq beg (point))
(setq shift-amt
- (cond ((= (char-after bof) ?=) 0)
- ((listp (setq indent (calculate-perl-indent bof))) indent)
+ (cond ((eq (char-after bof) ?=) 0)
+ ((listp (setq indent (perl-calculate-indent bof))) indent)
((looking-at (or nochange perl-nochange)) 0)
(t
(skip-chars-forward " \t\f")
- (cond ((looking-at "\\(\\w\\|\\s_\\)+:")
- (setq indent (max 1 (+ indent perl-label-offset))))
- ((= (following-char) ?})
- (setq indent (- indent perl-indent-level)))
- ((= (following-char) ?{)
- (setq indent (+ indent perl-brace-offset))))
+ (setq indent (perl-indent-new-calculate nil indent bof))
(- indent (current-column)))))
(skip-chars-forward " \t\f")
(if (and (numberp shift-amt) (/= 0 shift-amt))
(goto-char (- (point-max) pos)))
shift-amt))
-(defun calculate-perl-indent (&optional parse-start)
+(defun perl-continuation-line-p (limit)
+ "Move to end of previous line and return non-nil if continued."
+ ;; Statement level. Is it a continuation or a new statement?
+ ;; Find previous non-comment character.
+ (perl-backward-to-noncomment)
+ ;; Back up over label lines, since they don't
+ ;; affect whether our line is a continuation.
+ (while (or (eq (preceding-char) ?\,)
+ (and (eq (preceding-char) ?:)
+ (memq (char-syntax (char-after (- (point) 2)))
+ '(?w ?_))))
+ (if (eq (preceding-char) ?\,)
+ (perl-backward-to-start-of-continued-exp limit)
+ (beginning-of-line))
+ (perl-backward-to-noncomment))
+ ;; Now we get the answer.
+ (not (memq (preceding-char) '(?\; ?\} ?\{))))
+
+(defun perl-hanging-paren-p ()
+ "Non-nil if we are right after a hanging parenthesis-like char."
+ (and (looking-at "[ \t]*$")
+ (save-excursion
+ (skip-syntax-backward " (") (not (bolp)))))
+
+(defun perl-indent-new-calculate (&optional virtual default parse-start)
+ (or
+ (and virtual (save-excursion (skip-chars-backward " \t") (bolp))
+ (current-column))
+ (and (looking-at "\\(\\w\\|\\s_\\)+:[^:]")
+ (max 1 (+ (or default (perl-calculate-indent parse-start))
+ perl-label-offset)))
+ (and (= (char-syntax (following-char)) ?\))
+ (save-excursion
+ (forward-char 1)
+ (forward-sexp -1)
+ (perl-indent-new-calculate
+ ;; Recalculate the parsing-start, since we may have jumped
+ ;; dangerously close (typically in the case of nested functions).
+ 'virtual nil (save-excursion (perl-beginning-of-function)))))
+ (and (and (= (following-char) ?{)
+ (save-excursion (forward-char) (perl-hanging-paren-p)))
+ (+ (or default (perl-calculate-indent parse-start))
+ perl-brace-offset))
+ (or default (perl-calculate-indent parse-start))))
+
+(defun perl-calculate-indent (&optional parse-start)
"Return appropriate indentation for current line as Perl code.
In usual case returns an integer: the column to indent to.
-Returns (parse-state) if line starts inside a string."
+Returns (parse-state) if line starts inside a string.
+Optional argument PARSE-START should be the position of `beginning-of-defun'."
(save-excursion
- (beginning-of-line)
(let ((indent-point (point))
(case-fold-search nil)
(colon-line-end 0)
(if parse-start ;used to avoid searching
(goto-char parse-start)
(perl-beginning-of-function))
+ ;; We might be now looking at a local function that has nothing to
+ ;; do with us because `indent-point' is past it. In this case
+ ;; look further back up for another `perl-beginning-of-function'.
+ (while (and (looking-at "{")
+ (save-excursion
+ (beginning-of-line)
+ (looking-at "\\s-+sub\\>"))
+ (> indent-point (save-excursion (forward-sexp 1) (point))))
+ (perl-beginning-of-function))
(while (< (point) indent-point) ;repeat until right sexp
- (setq parse-start (point))
(setq state (parse-partial-sexp (point) indent-point 0))
-; state = (depth_in_parens innermost_containing_list last_complete_sexp
-; string_terminator_or_nil inside_commentp following_quotep
-; minimum_paren-depth_this_scan)
-; Parsing stops if depth in parentheses becomes equal to third arg.
+ ;; state = (depth_in_parens innermost_containing_list
+ ;; last_complete_sexp string_terminator_or_nil inside_commentp
+ ;; following_quotep minimum_paren-depth_this_scan)
+ ;; Parsing stops if depth in parentheses becomes equal to third arg.
(setq containing-sexp (nth 1 state)))
(cond ((nth 3 state) state) ; In a quoted string?
((null containing-sexp) ; Line is at top level.
(skip-chars-forward " \t\f")
(if (= (following-char) ?{)
- 0 ; move to beginning of line if it starts a function body
+ 0 ; move to beginning of line if it starts a function body
;; indent a little if this is a continuation line
(perl-backward-to-noncomment)
(if (or (bobp)
;; line is expression, not statement:
;; indent to just after the surrounding open.
(goto-char (1+ containing-sexp))
- (current-column))
+ (if (perl-hanging-paren-p)
+ ;; We're indenting an arg of a call like:
+ ;; $a = foobarlongnamefun (
+ ;; arg1
+ ;; arg2
+ ;; );
+ (progn
+ (skip-syntax-backward "(")
+ (condition-case err
+ (while (save-excursion
+ (skip-syntax-backward " ") (not (bolp)))
+ (forward-sexp -1))
+ (scan-error nil))
+ (+ (current-column) perl-indent-level))
+ (if perl-indent-continued-arguments
+ (+ perl-indent-continued-arguments (current-indentation))
+ (skip-chars-forward " \t")
+ (current-column))))
(t
;; Statement level. Is it a continuation or a new statement?
- ;; Find previous non-comment character.
- (perl-backward-to-noncomment)
- ;; Back up over label lines, since they don't
- ;; affect whether our line is a continuation.
- (while (or (eq (preceding-char) ?\,)
- (and (eq (preceding-char) ?:)
- (memq (char-syntax (char-after (- (point) 2)))
- '(?w ?_))))
- (if (eq (preceding-char) ?\,)
- (perl-backward-to-start-of-continued-exp containing-sexp))
- (beginning-of-line)
- (perl-backward-to-noncomment))
- ;; Now we get the answer.
- (if (not (memq (preceding-char) '(?\; ?\} ?\{)))
+ (if (perl-continuation-line-p containing-sexp)
;; This line is continuation of preceding line's statement;
;; indent perl-continued-statement-offset more than the
;; previous line of the statement.
(progn
(perl-backward-to-start-of-continued-exp containing-sexp)
- (+ perl-continued-statement-offset (current-column)
+ (+ (if (save-excursion
+ (perl-continuation-line-p containing-sexp))
+ ;; If the continued line is itself a continuation
+ ;; line, then align, otherwise add an offset.
+ 0 perl-continued-statement-offset)
+ (current-column)
(if (save-excursion (goto-char indent-point)
(looking-at "[ \t]*{"))
perl-continued-brace-offset 0)))
;; Position at last unclosed open.
(goto-char containing-sexp)
(or
- ;; If open paren is in col 0, close brace is special
- (and (bolp)
- (save-excursion (goto-char indent-point)
- (looking-at "[ \t]*}"))
- perl-indent-level)
- ;; Is line first statement after an open-brace?
- ;; If no, find that first statement and indent like it.
- (save-excursion
- (forward-char 1)
- ;; Skip over comments and labels following openbrace.
- (while (progn
- (skip-chars-forward " \t\f\n")
- (cond ((looking-at ";?#")
- (forward-line 1) t)
- ((looking-at "\\(\\w\\|\\s_\\)+:")
- (save-excursion
- (end-of-line)
- (setq colon-line-end (point)))
- (search-forward ":")))))
- ;; The first following code counts
- ;; if it is before the line we want to indent.
- (and (< (point) indent-point)
- (if (> colon-line-end (point))
- (- (current-indentation) perl-label-offset)
- (current-column))))
- ;; If no previous statement,
- ;; indent it relative to line brace is on.
- ;; For open paren in column zero, don't let statement
- ;; start there too. If perl-indent-level is zero,
- ;; use perl-brace-offset + perl-continued-statement-offset
- ;; For open-braces not the first thing in a line,
- ;; add in perl-brace-imaginary-offset.
- (+ (if (and (bolp) (zerop perl-indent-level))
- (+ perl-brace-offset perl-continued-statement-offset)
- perl-indent-level)
- ;; Move back over whitespace before the openbrace.
- ;; If openbrace is not first nonwhite thing on the line,
- ;; add the perl-brace-imaginary-offset.
- (progn (skip-chars-backward " \t")
- (if (bolp) 0 perl-brace-imaginary-offset))
- ;; If the openbrace is preceded by a parenthesized exp,
- ;; move to the beginning of that;
- ;; possibly a different line
- (progn
- (if (eq (preceding-char) ?\))
- (forward-sexp -1))
- ;; Get initial indentation of the line we are on.
- (current-indentation))))))))))
+ ;; Is line first statement after an open-brace?
+ ;; If no, find that first statement and indent like it.
+ (save-excursion
+ (forward-char 1)
+ ;; Skip over comments and labels following openbrace.
+ (while (progn
+ (skip-chars-forward " \t\f\n")
+ (cond ((looking-at ";?#")
+ (forward-line 1) t)
+ ((looking-at "\\(\\w\\|\\s_\\)+:[^:]")
+ (save-excursion
+ (end-of-line)
+ (setq colon-line-end (point)))
+ (search-forward ":")))))
+ ;; The first following code counts
+ ;; if it is before the line we want to indent.
+ (and (< (point) indent-point)
+ (if (> colon-line-end (point))
+ (- (current-indentation) perl-label-offset)
+ (current-column))))
+ ;; If no previous statement,
+ ;; indent it relative to line brace is on.
+ ;; For open paren in column zero, don't let statement
+ ;; start there too. If perl-indent-level is zero,
+ ;; use perl-brace-offset + perl-continued-statement-offset
+ ;; For open-braces not the first thing in a line,
+ ;; add in perl-brace-imaginary-offset.
+ (+ (if (and (bolp) (zerop perl-indent-level))
+ (+ perl-brace-offset perl-continued-statement-offset)
+ perl-indent-level)
+ ;; Move back over whitespace before the openbrace.
+ ;; If openbrace is not first nonwhite thing on the line,
+ ;; add the perl-brace-imaginary-offset.
+ (progn (skip-chars-backward " \t")
+ (if (bolp) 0 perl-brace-imaginary-offset))
+ ;; If the openbrace is preceded by a parenthesized exp,
+ ;; move to the beginning of that;
+ ;; possibly a different line
+ (progn
+ (if (eq (preceding-char) ?\))
+ (forward-sexp -1))
+ ;; Get initial indentation of the line we are on.
+ (current-indentation))))))))))
(defun perl-backward-to-noncomment ()
"Move point backward to after the first non-white-space, skipping comments."
(interactive)
- (let (opoint stop)
- (while (not stop)
- (setq opoint (point))
- (beginning-of-line)
- (if (re-search-forward comment-start-skip opoint 'move 1)
- (progn (goto-char (match-end 1))
- (skip-chars-forward ";")))
- (skip-chars-backward " \t\f")
- (setq stop (or (bobp)
- (not (bolp))
- (forward-char -1))))))
+ (forward-comment (- (point-max))))
(defun perl-backward-to-start-of-continued-exp (lim)
(if (= (preceding-char) ?\))
(skip-chars-forward " \t\f"))
\f
;; note: this may be slower than the c-mode version, but I can understand it.
-(defun indent-perl-exp ()
+(defalias 'indent-perl-exp 'perl-indent-exp)
+(defun perl-indent-exp ()
"Indent each line of the Perl grouping following point."
(interactive)
(let* ((case-fold-search nil)
(while (< (point) (marker-position last-mark))
(setq delta (perl-indent-line nil (marker-position bof-mark)))
(if (numberp delta) ; unquoted start-of-line?
- (progn
+ (progn
(if (eolp)
(delete-horizontal-space))
(setq lsexp-mark (point-marker))))
(listp delta)
(and (/= 0 delta)
(= (- (current-indentation) delta) comment-column)))
- (if (re-search-forward comment-start-skip eol t)
+ (if (and comment-start-skip
+ (re-search-forward comment-start-skip eol t))
(indent-for-comment))))) ; indent existing comment
(forward-line 1))
(goto-char (marker-position oldpnt))
(or arg (setq arg 1))
(let ((first t))
(while (and (> arg 0) (< (point) (point-max)))
- (let ((pos (point)) npos)
+ (let ((pos (point)))
(while (progn
(if (and first
(progn
(goto-char (point-min)))))
(setq arg (1+ arg)))))
-(defun mark-perl-function ()
+(defalias 'mark-perl-function 'perl-mark-function)
+(defun perl-mark-function ()
"Put mark at end of Perl function, point at beginning."
(interactive)
(push-mark (point))
(perl-beginning-of-function)
(backward-paragraph))
-;;;;;;;; That's all, folks! ;;;;;;;;;
+(provide 'perl-mode)
+
+;; arch-tag: 8c7ff68d-15f3-46a2-ade2-b7c41f176826
+;;; perl-mode.el ends here