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Diffstat (limited to 'emacs/cperl-mode')
| -rw-r--r-- | emacs/cperl-mode | 710 |
1 files changed, 710 insertions, 0 deletions
diff --git a/emacs/cperl-mode b/emacs/cperl-mode new file mode 100644 index 0000000000..eb4aae2ab6 --- /dev/null +++ b/emacs/cperl-mode @@ -0,0 +1,710 @@ +Article 15212 of comp.lang.perl: +Path: netlabs!news.cerf.net!usc!howland.reston.ans.net!spool.mu.edu!umn.edu!news-feed-2.peachnet.edu!concert!duke!khera +From: khera@cs.duke.edu (Vivek Khera) +Newsgroups: comp.lang.perl +Subject: cperl-mode.el +Message-ID: <KHERA.93Oct21140851@thneed.cs.duke.edu> +Date: 21 Oct 93 18:08:51 GMT +Sender: news@duke.cs.duke.edu +Organization: Duke University CS Dept., Durham, NC +Lines: 694 +Nntp-Posting-Host: thneed.cs.duke.edu +X-Md4-Signature: 40dd9bccfb99794a9da2ee891b5bf557 +X-Md5-Signature: e4baa8cf00c94092ebf9712514e4696b + +Since I've received requests to do so, I'm posting the cperl-mode.el +file. This allows Emacs (both version 18 and 19) to do nice things +when editing Perl code. Indentation works well, and it doesn't get +confused like the perl-mode.el that comes with Emacs 19. + +Install this file as cperl-mode.el, and add the following to your +.emacs file: + +(autoload 'perl-mode "cperl-mode" "alternate mode for editing Perl programs" t) + +This cperl-mode.el is not exactly the same as when it was originally +posted here. I made the following changes: perl-mode is an alias for +cperl-mode, and the major mode name is perl-mode, not cperl-mode. +This is so it is easier to use with Emacs 19. I suppose one could +install this as perl-mode.el and then not have to put the autoload +line in (for Emacs 19). + +Anyway, I'm not maintaining this, so don't send me bugs. + +--cut here-- +;;; From: olson@mcs.anl.gov (Bob Olson) +;;; Newsgroups: comp.lang.perl +;;; Subject: cperl-mode: Another perl mode for Gnuemacs +;;; Date: 14 Aug 91 15:20:01 GMT + +;; Perl code editing commands for Emacs +;; Copyright (C) 1985, 1986, 1987 Free Software Foundation, Inc. + +;; This file is part of GNU Emacs. + +;; GNU Emacs is distributed in the hope that it will be useful, +;; but WITHOUT ANY WARRANTY. No author or distributor +;; accepts responsibility to anyone for the consequences of using it +;; or for whether it serves any particular purpose or works at all, +;; unless he says so in writing. Refer to the GNU Emacs General Public +;; License for full details. + +;; Everyone is granted permission to copy, modify and redistribute +;; GNU Emacs, but only under the conditions described in the +;; GNU Emacs General Public License. A copy of this license is +;; supposed to have been given to you along with GNU Emacs so you +;; can know your rights and responsibilities. It should be in a +;; file named COPYING. Among other things, the copyright notice +;; and this notice must be preserved on all copies. + + +(defvar cperl-mode-abbrev-table nil + "Abbrev table in use in Cperl-mode buffers.") +(define-abbrev-table 'cperl-mode-abbrev-table ()) + +(defvar cperl-mode-map () + "Keymap used in C mode.") +(if cperl-mode-map + () + (setq cperl-mode-map (make-sparse-keymap)) + (define-key cperl-mode-map "{" 'electric-cperl-brace) + (define-key cperl-mode-map "}" 'electric-cperl-brace) + (define-key cperl-mode-map ";" 'electric-cperl-semi) + (define-key cperl-mode-map ":" 'electric-cperl-terminator) + (define-key cperl-mode-map "\e\C-h" 'mark-cperl-function) + (define-key cperl-mode-map "\e\C-q" 'indent-cperl-exp) + (define-key cperl-mode-map "\177" 'backward-delete-char-untabify) + (define-key cperl-mode-map "\t" 'cperl-indent-command)) + +(autoload 'cperl-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 cperl-mode-syntax-table nil + "Syntax table in use in Cperl-mode buffers.") + +(if cperl-mode-syntax-table + () + (setq cperl-mode-syntax-table (make-syntax-table)) + (modify-syntax-entry ?\\ "\\" cperl-mode-syntax-table) + (modify-syntax-entry ?/ ". 14" cperl-mode-syntax-table) + (modify-syntax-entry ?* ". 23" cperl-mode-syntax-table) + (modify-syntax-entry ?+ "." cperl-mode-syntax-table) + (modify-syntax-entry ?- "." cperl-mode-syntax-table) + (modify-syntax-entry ?= "." cperl-mode-syntax-table) + (modify-syntax-entry ?% "." cperl-mode-syntax-table) + (modify-syntax-entry ?< "." cperl-mode-syntax-table) + (modify-syntax-entry ?> "." cperl-mode-syntax-table) + (modify-syntax-entry ?& "." cperl-mode-syntax-table) + (modify-syntax-entry ?| "." cperl-mode-syntax-table)) + + +(defvar cperl-indent-level 2 + "*Indentation of C statements with respect to containing block.") +(defvar cperl-brace-imaginary-offset 0 + "*Imagined indentation of a C open brace that actually follows a statement.") +(defvar cperl-brace-offset 0 + "*Extra indentation for braces, compared with other text in same context.") +(defvar cperl-argdecl-indent 5 + "*Indentation level of declarations of C function arguments.") +(defvar cperl-label-offset -2 + "*Offset of C label lines and case statements relative to usual indentation.") +(defvar cperl-continued-statement-offset 2 + "*Extra indent for lines not starting new statements.") +(defvar cperl-continued-brace-offset 0 + "*Extra indent for substatements that start with open-braces. +This is in addition to cperl-continued-statement-offset.") + +(defvar cperl-auto-newline nil + "*Non-nil means automatically newline before and after braces, +and after colons and semicolons, inserted in C code.") + +(defvar cperl-tab-always-indent t + "*Non-nil means TAB in C mode should always reindent the current line, +regardless of where in the line point is when the TAB command is used.") + +;; provide an alias for working with emacs 19. the perl-mode that comes +;; with it is really bad, and this lets us seamlessly replace it. +(fset 'perl-mode 'cperl-mode) +(defun cperl-mode () + "Major mode for editing C code. +Expression and list commands understand all C brackets. +Tab indents for C code. +Comments are delimited with /* ... */. +Paragraphs are separated by blank lines only. +Delete converts tabs to spaces as it moves back. +\\{cperl-mode-map} +Variables controlling indentation style: + cperl-tab-always-indent + Non-nil means TAB in C mode should always reindent the current line, + regardless of where in the line point is when the TAB command is used. + cperl-auto-newline + Non-nil means automatically newline before and after braces, + and after colons and semicolons, inserted in C code. + cperl-indent-level + Indentation of C statements within surrounding block. + The surrounding block's indentation is the indentation + of the line on which the open-brace appears. + cperl-continued-statement-offset + Extra indentation given to a substatement, such as the + then-clause of an if or body of a while. + cperl-continued-brace-offset + Extra indentation given to a brace that starts a substatement. + This is in addition to cperl-continued-statement-offset. + cperl-brace-offset + Extra indentation for line if it starts with an open brace. + cperl-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. + cperl-argdecl-indent + Indentation level of declarations of C function arguments. + cperl-label-offset + Extra indentation for line that is a label, or case or default. + +Settings for K&R and BSD indentation styles are + cperl-indent-level 5 8 + cperl-continued-statement-offset 5 8 + cperl-brace-offset -5 -8 + cperl-argdecl-indent 0 8 + cperl-label-offset -5 -8 + +Turning on C mode calls the value of the variable cperl-mode-hook with no args, +if that value is non-nil." + (interactive) + (kill-all-local-variables) + (use-local-map cperl-mode-map) + (setq major-mode 'perl-mode) + (setq mode-name "CPerl") + (setq local-abbrev-table cperl-mode-abbrev-table) + (set-syntax-table cperl-mode-syntax-table) + (make-local-variable 'paragraph-start) + (setq paragraph-start (concat "^$\\|" page-delimiter)) + (make-local-variable 'paragraph-separate) + (setq paragraph-separate paragraph-start) + (make-local-variable 'paragraph-ignore-fill-prefix) + (setq paragraph-ignore-fill-prefix t) + (make-local-variable 'indent-line-function) + (setq indent-line-function 'cperl-indent-line) + (make-local-variable 'require-final-newline) + (setq require-final-newline t) + (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 "# *") + (make-local-variable 'comment-indent-hook) + (setq comment-indent-hook 'cperl-comment-indent) + (make-local-variable 'parse-sexp-ignore-comments) + (setq parse-sexp-ignore-comments t) + (run-hooks 'cperl-mode-hook)) + +;; This is used by indent-for-comment +;; to decide how much to indent a comment in C code +;; based on its context. +(defun cperl-comment-indent () + (if (looking-at "^#") + 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-cperl-brace (arg) + "Insert character and correct line's indentation." + (interactive "P") + (let (insertpos) + (if (and (not arg) + (eolp) + (or (save-excursion + (skip-chars-backward " \t") + (bolp)) + (if cperl-auto-newline (progn (cperl-indent-line) (newline) t) nil))) + (progn + (insert last-command-char) + (cperl-indent-line) + (if cperl-auto-newline + (progn + (newline) + ;; (newline) may have done auto-fill + (setq insertpos (- (point) 2)) + (cperl-indent-line))) + (save-excursion + (if insertpos (goto-char (1+ insertpos))) + (delete-char -1)))) + (if insertpos + (save-excursion + (goto-char insertpos) + (self-insert-command (prefix-numeric-value arg))) + (self-insert-command (prefix-numeric-value arg))))) + +(defun electric-cperl-semi (arg) + "Insert character and correct line's indentation." + (interactive "P") + (if cperl-auto-newline + (electric-cperl-terminator arg) + (self-insert-command (prefix-numeric-value arg)))) + +(defun electric-cperl-terminator (arg) + "Insert character and correct line's indentation." + (interactive "P") + (let (insertpos (end (point))) + (if (and (not arg) (eolp) + (not (save-excursion + (beginning-of-line) + (skip-chars-forward " \t") + (or (= (following-char) ?#) + ;; Colon is special only after a label, or case .... + ;; So quickly rule out most other uses of colon + ;; and do no indentation for them. + (and (eq last-command-char ?:) + (not (looking-at "case[ \t]")) + (save-excursion + (forward-word 1) + (skip-chars-forward " \t") + (< (point) end))) + (progn + (beginning-of-defun) + (let ((pps (parse-partial-sexp (point) end))) + (or (nth 3 pps) (nth 4 pps) (nth 5 pps)))))))) + (progn + (insert last-command-char) + (cperl-indent-line) + (and cperl-auto-newline + (not (cperl-inside-parens-p)) + (progn + (newline) + (setq insertpos (- (point) 2)) + (cperl-indent-line))) + (save-excursion + (if insertpos (goto-char (1+ insertpos))) + (delete-char -1)))) + (if insertpos + (save-excursion + (goto-char insertpos) + (self-insert-command (prefix-numeric-value arg))) + (self-insert-command (prefix-numeric-value arg))))) + +(defun cperl-inside-parens-p () + (condition-case () + (save-excursion + (save-restriction + (narrow-to-region (point) + (progn (beginning-of-defun) (point))) + (goto-char (point-max)) + (= (char-after (or (scan-lists (point) -1 1) (point-min))) ?\())) + (error nil))) + +(defun cperl-indent-command (&optional whole-exp) + (interactive "P") + "Indent current line as C code, or in some cases insert a tab character. +If cperl-tab-always-indent is non-nil (the default), always indent current line. +Otherwise, indent the current line only if point is at the left margin +or in the line's indentation; otherwise insert a tab. + +A numeric argument, regardless of its value, +means indent rigidly all the lines of the expression starting after point +so that this line becomes properly indented. +The relative indentation among the lines of the expression are preserved." + (if whole-exp + ;; If arg, always indent this line as C + ;; and shift remaining lines of expression the same amount. + (let ((shift-amt (cperl-indent-line)) + beg end) + (save-excursion + (if cperl-tab-always-indent + (beginning-of-line)) + (setq beg (point)) + (forward-sexp 1) + (setq end (point)) + (goto-char beg) + (forward-line 1) + (setq beg (point))) + (if (> end beg) + (indent-code-rigidly beg end shift-amt "#"))) + (if (and (not cperl-tab-always-indent) + (save-excursion + (skip-chars-backward " \t") + (not (bolp)))) + (insert-tab) + (cperl-indent-line)))) + +(defun cperl-indent-line () + "Indent current line as C code. +Return the amount the indentation changed by." + (let ((indent (calculate-cperl-indent nil)) + beg shift-amt + (case-fold-search nil) + (pos (- (point-max) (point)))) + (beginning-of-line) + (setq beg (point)) + (cond ((eq indent nil) + (setq indent (current-indentation))) + ((eq indent t) + (setq indent (calculate-cperl-indent-within-comment))) + ((looking-at "[ \t]*#") + (setq indent 0)) + (t + (skip-chars-forward " \t") + (if (listp indent) (setq indent (car indent))) + (cond ((or (looking-at "case[ \t]") + (and (looking-at "[A-Za-z]") + (save-excursion + (forward-sexp 1) + (looking-at ":")))) + (setq indent (max 1 (+ indent cperl-label-offset)))) + ((and (looking-at "else\\b") + (not (looking-at "else\\s_"))) + (setq indent (save-excursion + (cperl-backward-to-start-of-if) + (current-indentation)))) + ((= (following-char) ?}) + (setq indent (- indent cperl-indent-level))) + ((= (following-char) ?{) + (setq indent (+ indent cperl-brace-offset)))))) + (skip-chars-forward " \t") + (setq shift-amt (- indent (current-column))) + (if (zerop shift-amt) + (if (> (- (point-max) pos) (point)) + (goto-char (- (point-max) pos))) + (delete-region beg (point)) + (indent-to indent) + ;; If initial point was within line's indentation, + ;; position after the indentation. Else stay at same point in text. + (if (> (- (point-max) pos) (point)) + (goto-char (- (point-max) pos)))) + shift-amt)) + +(defun calculate-cperl-indent (&optional parse-start) + "Return appropriate indentation for current line as C code. +In usual case returns an integer: the column to indent to. +Returns nil if line starts inside a string, t if in a comment." + (save-excursion + (beginning-of-line) + (let ((indent-point (point)) + (case-fold-search nil) + state + containing-sexp) + (if parse-start + (goto-char parse-start) + (beginning-of-defun)) + (while (< (point) indent-point) + (setq parse-start (point)) + (setq state (parse-partial-sexp (point) indent-point 0)) + (setq containing-sexp (car (cdr state)))) + (cond ((or (nth 3 state) (nth 4 state)) + ;; return nil or t if should not change this line + (nth 4 state)) + ((null containing-sexp) + ;; Line is at top level. May be data or function definition, + ;; or may be function argument declaration. + ;; Indent like the previous top level line + ;; unless that ends in a closeparen without semicolon, + ;; in which case this line is the first argument decl. + (goto-char indent-point) + (skip-chars-forward " \t") + (if (= (following-char) ?{) + 0 ; Unless it starts a function body + (cperl-backward-to-noncomment (or parse-start (point-min))) + ;; Look at previous line that's at column 0 + ;; to determine whether we are in top-level decls + ;; or function's arg decls. Set basic-indent accordinglu. + (let ((basic-indent + (save-excursion + (re-search-backward "^[^ \^L\t\n#]" nil 'move) + (if (and (looking-at "\\sw\\|\\s_") + (looking-at ".*(") + (progn + (goto-char (1- (match-end 0))) + (forward-sexp 1) + (and (< (point) indent-point) + (not (memq (following-char) + '(?\, ?\;)))))) + cperl-argdecl-indent 0)))) + ;; Now add a little if this is a continuation line. + (+ basic-indent (if (or (bobp) + (memq (preceding-char) '(?\) ?\; ?\}))) + 0 cperl-continued-statement-offset))))) + ((/= (char-after containing-sexp) ?{) + ;; line is expression, not statement: + ;; indent to just after the surrounding open. + (goto-char (1+ containing-sexp)) + (current-column)) + (t + ;; Statement level. Is it a continuation or a new statement? + ;; Find previous non-comment character. + (goto-char indent-point) + (cperl-backward-to-noncomment containing-sexp) + ;; 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) ?:) + (or (eq (char-after (- (point) 2)) ?\') + (memq (char-syntax (char-after (- (point) 2))) + '(?w ?_))))) + (if (eq (preceding-char) ?\,) + (cperl-backward-to-start-of-continued-exp containing-sexp)) + (beginning-of-line) + (cperl-backward-to-noncomment containing-sexp)) + ;; Now we get the answer. + (if (not (memq (preceding-char) '(nil ?\, ?\; ?\} ?\{))) + ;; This line is continuation of preceding line's statement; + ;; indent cperl-continued-statement-offset more than the + ;; previous line of the statement. + (progn + (cperl-backward-to-start-of-continued-exp containing-sexp) + (+ cperl-continued-statement-offset (current-column) + (if (save-excursion (goto-char indent-point) + (skip-chars-forward " \t") + (eq (following-char) ?{)) + cperl-continued-brace-offset 0))) + ;; This line starts a new statement. + ;; Position following last unclosed open. + (goto-char containing-sexp) + ;; Is line first statement after an open-brace? + (or + ;; If no, find that first statement and indent like it. + (save-excursion + (forward-char 1) + (let ((colon-line-end 0)) + (while (progn (skip-chars-forward " \t\n") + (looking-at "#\\|/\\*\\|case[ \t\n].*:\\|[a-zA-Z0-9_$]*:")) + ;; Skip over comments and labels following openbrace. + (cond ((= (following-char) ?\#) + (forward-line 1)) + ((= (following-char) ?\/) + (forward-char 2) + (search-forward "*/" nil 'move)) + ;; case or label: + (t + (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) cperl-label-offset) + (current-column))))) + ;; If no previous statement, + ;; indent it relative to line brace is on. + ;; For open brace in column zero, don't let statement + ;; start there too. If cperl-indent-level is zero, + ;; use cperl-brace-offset + cperl-continued-statement-offset instead. + ;; For open-braces not the first thing in a line, + ;; add in cperl-brace-imaginary-offset. + (+ (if (and (bolp) (zerop cperl-indent-level)) + (+ cperl-brace-offset cperl-continued-statement-offset) + cperl-indent-level) + ;; Move back over whitespace before the openbrace. + ;; If openbrace is not first nonwhite thing on the line, + ;; add the cperl-brace-imaginary-offset. + (progn (skip-chars-backward " \t") + (if (bolp) 0 cperl-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 calculate-cperl-indent-within-comment () + "Return the indentation amount for line, assuming that +the current line is to be regarded as part of a block comment." + (let (end star-start) + (save-excursion + (beginning-of-line) + (skip-chars-forward " \t") + (setq star-start (= (following-char) ?\*)) + (skip-chars-backward " \t\n") + (setq end (point)) + (beginning-of-line) + (skip-chars-forward " \t") + (and (re-search-forward "/\\*[ \t]*" end t) + star-start + (goto-char (1+ (match-beginning 0)))) + (current-column)))) + + +(defun cperl-backward-to-noncomment (lim) + (let (opoint stop) + (while (not stop) + (skip-chars-backward " \t\n\f" lim) + (setq opoint (point)) + (if (and (>= (point) (+ 2 lim)) + (save-excursion + (forward-char -2) + (looking-at "\\*/"))) + (search-backward "/*" lim 'move) + (beginning-of-line) + (skip-chars-forward " \t") + (setq stop (or (not (looking-at "#")) (<= (point) lim))) + (if stop (goto-char opoint) + (beginning-of-line)))))) + +(defun cperl-backward-to-start-of-continued-exp (lim) + (if (= (preceding-char) ?\)) + (forward-sexp -1)) + (beginning-of-line) + (if (<= (point) lim) + (goto-char (1+ lim))) + (skip-chars-forward " \t")) + +(defun cperl-backward-to-start-of-if (&optional limit) + "Move to the start of the last ``unbalanced'' if." + (or limit (setq limit (save-excursion (beginning-of-defun) (point)))) + (let ((if-level 1) + (case-fold-search nil)) + (while (not (zerop if-level)) + (backward-sexp 1) + (cond ((looking-at "else\\b") + (setq if-level (1+ if-level))) + ((looking-at "if\\b") + (setq if-level (1- if-level))) + ((< (point) limit) + (setq if-level 0) + (goto-char limit)))))) + + +(defun mark-cperl-function () + "Put mark at end of C function, point at beginning." + (interactive) + (push-mark (point)) + (end-of-defun) + (push-mark (point)) + (beginning-of-defun) + (backward-paragraph)) + +(defun indent-cperl-exp () + "Indent each line of the C grouping following point." + (interactive) + (let ((indent-stack (list nil)) + (contain-stack (list (point))) + (case-fold-search nil) + restart outer-loop-done inner-loop-done state ostate + this-indent last-sexp + at-else at-brace + (opoint (point)) + (next-depth 0)) + (save-excursion + (forward-sexp 1)) + (save-excursion + (setq outer-loop-done nil) + (while (and (not (eobp)) (not outer-loop-done)) + (setq last-depth next-depth) + ;; Compute how depth changes over this line + ;; plus enough other lines to get to one that + ;; does not end inside a comment or string. + ;; Meanwhile, do appropriate indentation on comment lines. + (setq innerloop-done nil) + (while (and (not innerloop-done) + (not (and (eobp) (setq outer-loop-done t)))) + (setq ostate state) + (setq state (parse-partial-sexp (point) (progn (end-of-line) (point)) + nil nil state)) + (setq next-depth (car state)) + (if (and (car (cdr (cdr state))) + (>= (car (cdr (cdr state))) 0)) + (setq last-sexp (car (cdr (cdr state))))) + (if (or (nth 4 ostate)) + (cperl-indent-line)) + (if (or (nth 3 state)) + (forward-line 1) + (setq innerloop-done t))) + (if (<= next-depth 0) + (setq outer-loop-done t)) + (if outer-loop-done + nil + ;; If this line had ..))) (((.. in it, pop out of the levels + ;; that ended anywhere in this line, even if the final depth + ;; doesn't indicate that they ended. + (while (> last-depth (nth 6 state)) + (setq indent-stack (cdr indent-stack) + contain-stack (cdr contain-stack) + last-depth (1- last-depth))) + (if (/= last-depth next-depth) + (setq last-sexp nil)) + ;; Add levels for any parens that were started in this line. + (while (< last-depth next-depth) + (setq indent-stack (cons nil indent-stack) + contain-stack (cons nil contain-stack) + last-depth (1+ last-depth))) + (if (null (car contain-stack)) + (setcar contain-stack (or (car (cdr state)) + (save-excursion (forward-sexp -1) + (point))))) + (forward-line 1) + (skip-chars-forward " \t") + (if (eolp) + nil + (if (and (car indent-stack) + (>= (car indent-stack) 0)) + ;; Line is on an existing nesting level. + ;; Lines inside parens are handled specially. + (if (/= (char-after (car contain-stack)) ?{) + (setq this-indent (car indent-stack)) + ;; Line is at statement level. + ;; Is it a new statement? Is it an else? + ;; Find last non-comment character before this line + (save-excursion + (setq at-else (looking-at "else\\W")) + (setq at-brace (= (following-char) ?{)) + (cperl-backward-to-noncomment opoint) + (if (not (memq (preceding-char) '(nil ?\, ?\; ?} ?: ?{))) + ;; Preceding line did not end in comma or semi; + ;; indent this line cperl-continued-statement-offset + ;; more than previous. + (progn + (cperl-backward-to-start-of-continued-exp (car contain-stack)) + (setq this-indent + (+ cperl-continued-statement-offset (current-column) + (if at-brace cperl-continued-brace-offset 0)))) + ;; Preceding line ended in comma or semi; + ;; use the standard indent for this level. + (if at-else + (progn (cperl-backward-to-start-of-if opoint) + (setq this-indent (current-indentation))) + (setq this-indent (car indent-stack)))))) + ;; Just started a new nesting level. + ;; Compute the standard indent for this level. + (let ((val (calculate-cperl-indent + (if (car indent-stack) + (- (car indent-stack)))))) + (setcar indent-stack + (setq this-indent val)))) + ;; Adjust line indentation according to its contents + (if (or (looking-at "case[ \t]") + (and (looking-at "[A-Za-z]") + (save-excursion + (forward-sexp 1) + (looking-at ":")))) + (setq this-indent (max 1 (+ this-indent cperl-label-offset)))) + (if (= (following-char) ?}) + (setq this-indent (- this-indent cperl-indent-level))) + (if (= (following-char) ?{) + (setq this-indent (+ this-indent cperl-brace-offset))) + ;; Put chosen indentation into effect. + (or (= (current-column) this-indent) + (= (following-char) ?\#) + (progn + (delete-region (point) (progn (beginning-of-line) (point))) + (indent-to this-indent))) + ;; Indent any comment following the text. + (or (looking-at comment-start-skip) + (if (re-search-forward comment-start-skip (save-excursion (end-of-line) (point)) t) + (progn (indent-for-comment) (beginning-of-line))))))))) +; (message "Indenting C expression...done") + ) +--cut here-- +-- +=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= +Vivek Khera, Gradual Student/Systems Guy Department of Computer Science +Internet: khera@cs.duke.edu Box 90129 + RIPEM/PGP/MIME spoken here Durham, NC 27708-0129 (919)660-6528 + + |