lisp/progmodes/simula.el

   1 ;;; simula.el --- SIMULA 87 code editing commands for Emacs
   2
   3 ;; Copyright (C) 1992, 1994, 1996, 2001-2011  Free Software Foundation, Inc.
   4
   5 ;; Author: Hans Henrik Eriksen <hhe@ifi.uio.no>
   6 ;; Maintainer: simula-mode@ifi.uio.no
   7 ;;   (above email addresses invalid as of April 2008)
   8 ;; Adapted-By: ESR
   9 ;; Keywords: languages
  10
  11 ;; This file is part of GNU Emacs.
  12
  13 ;; GNU Emacs is free software: you can redistribute it and/or modify
  14 ;; it under the terms of the GNU General Public License as published by
  15 ;; the Free Software Foundation, either version 3 of the License, or
  16 ;; (at your option) any later version.
  17
  18 ;; GNU Emacs is distributed in the hope that it will be useful,
  19 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21 ;; GNU General Public License for more details.
  22
  23 ;; You should have received a copy of the GNU General Public License
  24 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  25
  26 ;;; Commentary:
  27
  28 ;; A major mode for editing the Simula language.  It knows about Simula
  29 ;; syntax and standard indentation commands.  It also provides convenient
  30 ;; abbrevs for Simula keywords.
  31 ;;
  32 ;; Hans Henrik Eriksen (the author) may be reached at:
  33 ;;         Institutt for informatikk,
  34 ;;         Universitetet i Oslo
  35
  36 ;;; Code:
  37
  38 \f
  39 (defgroup simula nil
  40   "Major mode for editing Simula code."
  41   :link '(custom-group-link :tag "Font Lock Faces group" font-lock-faces)
  42   :prefix "simula-"
  43   :group 'languages)
  44
  45 (defconst simula-tab-always-indent-default nil
  46   "Non-nil means TAB in SIMULA mode should always reindent the current line.
  47 Otherwise TAB indents only when point is within
  48 the run of whitespace at the beginning of the line.")
  49
  50 (defcustom simula-tab-always-indent simula-tab-always-indent-default
  51   "*Non-nil means TAB in SIMULA mode should always reindent the current line.
  52 Otherwise TAB indents only when point is within
  53 the run of whitespace at the beginning of the line."
  54   :type 'boolean
  55   :group 'simula)
  56
  57 (defconst simula-indent-level-default 3
  58   "Indentation of SIMULA statements with respect to containing block.")
  59
  60 (defcustom simula-indent-level simula-indent-level-default
  61   "*Indentation of SIMULA statements with respect to containing block."
  62   :type 'integer
  63   :group 'simula)
  64
  65
  66 (defconst simula-substatement-offset-default 3
  67   "Extra indentation after DO, THEN, ELSE, WHEN and OTHERWISE.")
  68
  69 (defcustom simula-substatement-offset simula-substatement-offset-default
  70   "*Extra indentation after DO, THEN, ELSE, WHEN and OTHERWISE."
  71   :type 'integer
  72   :group 'simula)
  73
  74 (defconst simula-continued-statement-offset-default 3
  75   "Extra indentation for lines not starting a statement or substatement.
  76 If value is a list, each line in a multipleline continued statement
  77 will have the car of the list extra indentation with respect to
  78 the previous line of the statement.")
  79
  80 (defcustom simula-continued-statement-offset
  81   simula-continued-statement-offset-default
  82   "*Extra indentation for lines not starting a statement or substatement.
  83 If value is a list, each line in a multipleline continued statement
  84 will have the car of the list extra indentation with respect to
  85 the previous line of the statement."
  86   :type 'integer
  87   :group 'simula)
  88
  89 (defconst simula-label-offset-default -4711
  90   "Offset of SIMULA label lines relative to usual indentation.")
  91
  92 (defcustom simula-label-offset simula-label-offset-default
  93   "*Offset of SIMULA label lines relative to usual indentation."
  94   :type 'integer
  95   :group 'simula)
  96
  97 (defconst simula-if-indent-default '(0 . 0)
  98   "Extra indentation of THEN and ELSE with respect to the starting IF.
  99 Value is a cons cell, the car is extra THEN indentation and the cdr
 100 extra ELSE indentation.  IF after ELSE is indented as the starting IF.")
 101
 102 (defcustom simula-if-indent simula-if-indent-default
 103   "*Extra indentation of THEN and ELSE with respect to the starting IF.
 104 Value is a cons cell, the car is extra THEN indentation and the cdr
 105 extra ELSE indentation.  IF after ELSE is indented as the starting IF."
 106   :type '(cons integer integer)
 107   :group 'simula)
 108
 109 (defconst simula-inspect-indent-default '(0 . 0)
 110   "Extra indentation of WHEN and OTHERWISE with respect to the INSPECT.
 111 Value is a cons cell, the car is extra WHEN indentation
 112 and the cdr extra OTHERWISE indentation.")
 113
 114 (defcustom simula-inspect-indent simula-inspect-indent-default
 115   "*Extra indentation of WHEN and OTHERWISE with respect to the INSPECT.
 116 Value is a cons cell, the car is extra WHEN indentation
 117 and the cdr extra OTHERWISE indentation."
 118   :type '(cons integer integer)
 119   :group 'simula)
 120
 121 (defconst simula-electric-indent-default nil
 122   "Non-nil means `simula-indent-line' function may reindent previous line.")
 123
 124 (defcustom simula-electric-indent simula-electric-indent-default
 125   "*Non-nil means `simula-indent-line' function may reindent previous line."
 126   :type 'boolean
 127   :group 'simula)
 128
 129 (defconst simula-abbrev-keyword-default 'upcase
 130   "Specify how to convert case for SIMULA keywords.
 131 Value is one of the symbols `upcase', `downcase', `capitalize',
 132 \(as in) `abbrev-table' or nil if they should not be changed.")
 133
 134 (defcustom simula-abbrev-keyword simula-abbrev-keyword-default
 135   "*Specify how to convert case for SIMULA keywords.
 136 Value is one of the symbols `upcase', `downcase', `capitalize',
 137 \(as in) `abbrev-table' or nil if they should not be changed."
 138   :type '(choice (const upcase) (const downcase) (const capitalize)(const nil))
 139   :group 'simula)
 140
 141 (defconst simula-abbrev-stdproc-default 'abbrev-table
 142   "Specify how to convert case for standard SIMULA procedure and class names.
 143 Value is one of the symbols `upcase', `downcase', `capitalize',
 144 \(as in) `abbrev-table', or nil if they should not be changed.")
 145
 146 (defcustom simula-abbrev-stdproc simula-abbrev-stdproc-default
 147   "*Specify how to convert case for standard SIMULA procedure and class names.
 148 Value is one of the symbols `upcase', `downcase', `capitalize',
 149 \(as in) `abbrev-table', or nil if they should not be changed."
 150   :type '(choice (const upcase) (const downcase) (const capitalize)
 151           (const abbrev-table) (const nil))
 152   :group 'simula)
 153
 154 (defcustom simula-abbrev-file nil
 155   "*File with extra abbrev definitions for use in SIMULA mode.
 156 These are used together with the standard abbrev definitions for SIMULA.
 157 Please note that the standard definitions are required
 158 for SIMULA mode to function correctly."
 159   :type '(choice file (const nil))
 160   :group 'simula)
 161
 162 (defvar simula-mode-syntax-table nil
 163   "Syntax table in SIMULA mode buffers.")
 164
 165 (defconst simula-syntax-propertize-function
 166   (syntax-propertize-rules
 167    ;; `comment' directive.
 168    ("\\<\\(c\\)omment\\>" (1 "<"))
 169    ;; end comments
 170    ((concat "\\<end\\>\\([^;\n]\\).*?\\(\n\\|\\(.\\)\\(;\\|"
 171             (regexp-opt '("end" "else" "when" "otherwise"))
 172             "\\)\\)")
 173     (1 "< b")
 174     (3 "> b"))
 175    ;; non-quoted single-quote char.
 176    ("'\\('\\)'" (1 "."))))
 177
 178 ;; Regexps written with help from Alf-Ivar Holm <alfh@ifi.uio.no>.
 179 (defconst simula-font-lock-keywords-1
 180   '(;;
 181     ;; Compiler directives.
 182     ("^%\\([^ \t\n].*\\)" 1 font-lock-constant-face t)
 183     ;;
 184     ;; Class and procedure names.
 185     ("\\<\\(class\\|procedure\\)\\>[ \t]*\\(\\sw+\\)?"
 186      (1 font-lock-keyword-face) (2 font-lock-function-name-face nil t)))
 187   "Subdued level highlighting for Simula mode.")
 188
 189 (defconst simula-font-lock-keywords-2
 190   (append simula-font-lock-keywords-1
 191    (list
 192     ;;
 193     ;; Constants.
 194     '("\\<\\(false\\|none\\|notext\\|true\\)\\>" . font-lock-constant-face)
 195     ;;
 196     ;; Keywords.
 197     (regexp-opt
 198      '("activate" "after" "and" "at" "before" "begin" "delay" "do"
 199        "else" "end" "eq" "eqv" "external" "for" "ge" "go" "goto" "gt"
 200        "hidden" "if" "imp" "in" "inner" "inspect" "is" "label" "le"
 201        "lt" "ne" "new" "not" "or" "otherwise" "prior" "protected"
 202        "qua" "reactivate" "step" "switch" "then" "this" "to" "until"
 203        "virtual" "when" "while") 'words)
 204     ;;
 205     ;; Types.
 206     (cons (regexp-opt
 207            '("array" "boolean" "character" "integer"
 208              "long" "name" "real" "short" "text" "value" "ref") 'words)
 209           'font-lock-type-face)))
 210   "Medium level highlighting for Simula mode.")
 211
 212 (defconst simula-font-lock-keywords-3
 213   (append simula-font-lock-keywords-2
 214    (list
 215     ;;
 216     ;; Super-class names and super-slow.
 217     '("\\<\\(\\sw+\\)[ \t]+class\\>" 1 font-lock-function-name-face)
 218     ;;
 219     ;; Types and their declarations.
 220     (list (concat "\\<\\(array\\|boolean\\|character\\|integer\\|"
 221                   "long\\|name\\|real\\|short\\|text\\|value\\)\\>"
 222                   "\\([ \t]+\\sw+\\>\\)*")
 223           '(font-lock-match-c-style-declaration-item-and-skip-to-next
 224             ;; Start with point after all type specifiers.
 225             (goto-char (or (match-beginning 2) (match-end 1)))
 226             ;; Finish with point after first type specifier.
 227             (goto-char (match-end 1))
 228             ;; Fontify as a variable name.
 229             (1 font-lock-variable-name-face)))
 230     ;;
 231     ;; Object references and their declarations.
 232     '("\\<\\(ref\\)\\>[ \t]*\\((\\(\\sw+\\))\\)?"
 233       (3 font-lock-function-name-face nil t)
 234       (font-lock-match-c-style-declaration-item-and-skip-to-next nil nil
 235        (1 font-lock-variable-name-face)))
 236     ))
 237   "Gaudy level highlighting for Simula mode.")
 238
 239 (defvar simula-font-lock-keywords simula-font-lock-keywords-1
 240   "Default expressions to highlight in Simula mode.")
 241
 242 ; The following function is taken from cc-mode.el,
 243 ; it determines the flavor of the Emacs running
 244
 245 (defvar simula-mode-menu
 246   '(["Report Bug"             simula-submit-bug-report t]
 247     ["Indent Line"            simula-indent-line t]
 248     ["Backward Statement"     simula-previous-statement t]
 249     ["Forward Statement"      simula-next-statement t]
 250     ["Backward Up Level"      simula-backward-up-level t]
 251     ["Forward Down Statement" simula-forward-down-level t])
 252   "Lucid Emacs menu for SIMULA mode.")
 253
 254 (if simula-mode-syntax-table
 255     ()
 256   (setq simula-mode-syntax-table (copy-syntax-table (standard-syntax-table)))
 257   (modify-syntax-entry ?!  "<"    simula-mode-syntax-table)
 258   (modify-syntax-entry ?$  "."    simula-mode-syntax-table)
 259   (modify-syntax-entry ?%  "< b"  simula-mode-syntax-table)
 260   (modify-syntax-entry ?\n "> b"  simula-mode-syntax-table)
 261   (modify-syntax-entry ?'  "\""   simula-mode-syntax-table)
 262   (modify-syntax-entry ?\( "()"   simula-mode-syntax-table)
 263   (modify-syntax-entry ?\) ")("   simula-mode-syntax-table)
 264   (modify-syntax-entry ?\; ">"    simula-mode-syntax-table)
 265   (modify-syntax-entry ?\[ "."    simula-mode-syntax-table)
 266   (modify-syntax-entry ?\\ "."    simula-mode-syntax-table)
 267   (modify-syntax-entry ?\] "."    simula-mode-syntax-table)
 268   (modify-syntax-entry ?_  "_"    simula-mode-syntax-table)
 269   (modify-syntax-entry ?\| "."    simula-mode-syntax-table)
 270   (modify-syntax-entry ?\{ "."    simula-mode-syntax-table)
 271   (modify-syntax-entry ?\} "."    simula-mode-syntax-table))
 272
 273 (defvar simula-mode-map
 274   (let ((map (make-sparse-keymap)))
 275     (define-key map "\C-c\C-u"   'simula-backward-up-level)
 276     (define-key map "\C-c\C-p"   'simula-previous-statement)
 277     (define-key map "\C-c\C-d"   'simula-forward-down-level)
 278     (define-key map "\C-c\C-n"   'simula-next-statement)
 279     ;; (define-key map "\C-c\C-g"   'simula-goto-definition)
 280     ;; (define-key map "\C-c\C-h"   'simula-standard-help)
 281     (define-key map "\177"       'backward-delete-char-untabify)
 282     (define-key map ":"          'simula-electric-label)
 283     (define-key map "\e\C-q"     'simula-indent-exp)
 284     (define-key map "\t"         'simula-indent-command)
 285     ;; Emacs 19 defines menus in the mode map
 286     (define-key map [menu-bar simula]
 287       (cons "SIMULA" (make-sparse-keymap "SIMULA")))
 288     (define-key map [menu-bar simula bug-report]
 289       '("Submit Bug Report" . simula-submit-bug-report))
 290     (define-key map [menu-bar simula separator-indent]
 291       '("--"))
 292     (define-key map [menu-bar simula indent-exp]
 293       '("Indent Expression" . simula-indent-exp))
 294     (define-key map [menu-bar simula indent-line]
 295       '("Indent Line" . simula-indent-command))
 296     (define-key map [menu-bar simula separator-navigate]
 297       '("--"))
 298     (define-key map [menu-bar simula backward-stmt]
 299       '("Previous Statement" . simula-previous-statement))
 300     (define-key map [menu-bar simula forward-stmt]
 301       '("Next Statement" . simula-next-statement))
 302     (define-key map [menu-bar simula backward-up]
 303       '("Backward Up Level" . simula-backward-up-level))
 304     (define-key map [menu-bar simula forward-down]
 305       '("Forward Down Statement" . simula-forward-down-level))
 306
 307     (put 'simula-next-statement 'menu-enable '(not (eobp)))
 308     (put 'simula-previous-statement 'menu-enable '(not (bobp)))
 309     (put 'simula-forward-down-level 'menu-enable '(not (eobp)))
 310     (put 'simula-backward-up-level 'menu-enable '(not (bobp)))
 311     (put 'simula-indent-command 'menu-enable '(not buffer-read-only))
 312     (put 'simula-indent-exp 'menu-enable '(not buffer-read-only))
 313
 314     ;; RMS: mouse-3 should not select this menu.  mouse-3's global
 315     ;; definition is useful in SIMULA mode and we should not interfere
 316     ;; with that.  The menu is mainly for beginners, and for them,
 317     ;; the menubar requires less memory than a special click.
 318     ;; in Lucid Emacs, we want the menu to popup when the 3rd button is
 319     ;; hit.  In 19.10 and beyond this is done automatically if we put
 320     ;; the menu on mode-popup-menu variable, see c-common-init [cc-mode.el]
 321     ;;(if (not (boundp 'mode-popup-menu))
 322     ;;  (define-key simula-mode-map 'button3 'simula-popup-menu))
 323     map)
 324   "Keymap used in `simula-mode'.")
 325
 326 ;; menus for Lucid
 327 (defun simula-popup-menu (_e)
 328   "Pops up the SIMULA menu."
 329   (interactive "@e")
 330   (popup-menu (cons (concat mode-name " Mode Commands") simula-mode-menu)))
 331
 332 ;;;###autoload
 333 (define-derived-mode simula-mode prog-mode "Simula"
 334   "Major mode for editing SIMULA code.
 335 \\{simula-mode-map}
 336 Variables controlling indentation style:
 337  `simula-tab-always-indent'
 338     Non-nil means TAB in SIMULA mode should always reindent the current line,
 339     regardless of where in the line point is when the TAB command is used.
 340  `simula-indent-level'
 341     Indentation of SIMULA statements with respect to containing block.
 342  `simula-substatement-offset'
 343     Extra indentation after DO, THEN, ELSE, WHEN and OTHERWISE.
 344  `simula-continued-statement-offset' 3
 345     Extra indentation for lines not starting a statement or substatement,
 346     e.g. a nested FOR-loop.  If value is a list, each line in a multiple-
 347     line continued statement will have the car of the list extra indentation
 348     with respect to the previous line of the statement.
 349  `simula-label-offset' -4711
 350     Offset of SIMULA label lines relative to usual indentation.
 351  `simula-if-indent' '(0 . 0)
 352     Extra indentation of THEN and ELSE with respect to the starting IF.
 353     Value is a cons cell, the car is extra THEN indentation and the cdr
 354     extra ELSE indentation.  IF after ELSE is indented as the starting IF.
 355  `simula-inspect-indent' '(0 . 0)
 356     Extra indentation of WHEN and OTHERWISE with respect to the
 357     corresponding INSPECT.  Value is a cons cell, the car is
 358     extra WHEN indentation and the cdr extra OTHERWISE indentation.
 359  `simula-electric-indent' nil
 360     If this variable is non-nil, `simula-indent-line'
 361     will check the previous line to see if it has to be reindented.
 362  `simula-abbrev-keyword' 'upcase
 363     Determine how SIMULA keywords will be expanded.  Value is one of
 364     the symbols `upcase', `downcase', `capitalize', (as in) `abbrev-table',
 365     or nil if they should not be changed.
 366  `simula-abbrev-stdproc' 'abbrev-table
 367     Determine how standard SIMULA procedure and class names will be
 368     expanded.  Value is one of the symbols `upcase', `downcase', `capitalize',
 369     (as in) `abbrev-table', or nil if they should not be changed.
 370
 371 Turning on SIMULA mode calls the value of the variable simula-mode-hook
 372 with no arguments, if that value is non-nil."
 373   (set (make-local-variable 'comment-column) 40)
 374   ;; (set (make-local-variable 'end-comment-column) 75)
 375   (set (make-local-variable 'paragraph-start) "[ \t]*$\\|\\f")
 376   (set (make-local-variable 'paragraph-separate) paragraph-start)
 377   (set (make-local-variable 'indent-line-function) 'simula-indent-line)
 378   (set (make-local-variable 'comment-start) "! ")
 379   (set (make-local-variable 'comment-end) " ;")
 380   (set (make-local-variable 'comment-start-skip) "!+ *")
 381   (set (make-local-variable 'parse-sexp-ignore-comments) nil)
 382   (set (make-local-variable 'comment-multi-line) t)
 383   (set (make-local-variable 'font-lock-defaults)
 384        '((simula-font-lock-keywords simula-font-lock-keywords-1
 385           simula-font-lock-keywords-2 simula-font-lock-keywords-3)
 386          nil t ((?_ . "w"))))
 387   (set (make-local-variable 'syntax-propertize-function)
 388        simula-syntax-propertize-function)
 389   (abbrev-mode 1))
 390
 391 (defun simula-indent-exp ()
 392   "Indent SIMULA expression following point."
 393   (interactive)
 394   (let ((here (point))
 395         (simula-electric-indent nil)
 396         end)
 397     (simula-skip-comment-forward)
 398     (if (eobp)
 399         (goto-char here)
 400       (unwind-protect
 401           (progn
 402             (simula-next-statement 1)
 403             (setq end (point-marker))
 404             (simula-previous-statement 1)
 405             (beginning-of-line)
 406             (while (< (point) end)
 407               (if (not (looking-at "[ \t]*$"))
 408                   (simula-indent-line))
 409               (forward-line 1)))
 410         (and end (set-marker end nil))))))
 411
 412
 413 (defun simula-indent-line ()
 414   "Indent this line as SIMULA code.
 415 If `simula-electric-indent' is non-nil, indent previous line if necessary."
 416   (let ((origin (- (point-max) (point)))
 417         (indent (simula-calculate-indent))
 418         (case-fold-search t))
 419     (unwind-protect
 420         (if simula-electric-indent
 421             (progn
 422               ;;
 423               ;; manually expand abbrev on last line, if any
 424               ;;
 425               (end-of-line 0)
 426               (expand-abbrev)
 427               ;; now maybe we should reindent that line
 428               (beginning-of-line)
 429               (skip-chars-forward " \t\f")
 430               (if (and
 431                    (looking-at
 432                     "\\(end\\|if\\|then\\|else\\|when\\|otherwise\\)\\>")
 433                    (not (simula-context)))
 434                   ;; yes - reindent
 435                   (let ((post-indent (simula-calculate-indent)))
 436                     (if (eq (current-indentation) post-indent)
 437                         ()
 438                       (delete-horizontal-space)
 439                       (indent-to post-indent))))))
 440       (goto-char (- (point-max) origin))
 441       (if (eq (current-indentation) indent)
 442           (back-to-indentation)
 443         (delete-horizontal-space)
 444         (indent-to indent)))))
 445
 446
 447 (defun simula-indent-command (&optional whole-exp)
 448   "Indent current line as SIMULA code, or insert TAB character.
 449 If `simula-tab-always-indent' is non-nil, always indent current line.
 450 Otherwise, indent only if point is before any non-whitespace
 451 character on the line.
 452
 453 A numeric argument, regardless of its value, means indent rigidly
 454 all the lines of the SIMULA statement after point so that this line
 455 becomes properly indented.
 456 The relative indentation among the lines of the statement are preserved."
 457   (interactive "P")
 458   (let ((case-fold-search t))
 459     (if (or whole-exp simula-tab-always-indent
 460             (save-excursion
 461               (skip-chars-backward " \t\f")
 462               (bolp)))
 463         ;; reindent current line
 464         (let ((indent (save-excursion
 465                         (beginning-of-line)
 466                         (simula-calculate-indent)))
 467               (current (current-indentation))
 468               (origin (- (point-max) (point)))
 469               (bol (save-excursion
 470                      (skip-chars-backward " \t\f")
 471                      (bolp)))
 472               beg end)
 473           (unwind-protect
 474               (if (eq current indent)
 475                   (if (save-excursion
 476                         (skip-chars-backward " \t\f")
 477                         (bolp))
 478                       (back-to-indentation))
 479                 (beginning-of-line)
 480                 (delete-horizontal-space)
 481                 (indent-to indent))
 482             (if (not bol)
 483                 (goto-char (- (point-max) origin))))
 484           (setq origin (point))
 485           (if whole-exp
 486               (save-excursion
 487                 (beginning-of-line 2)
 488                 (setq beg (point))
 489                 (goto-char origin)
 490                 (simula-next-statement 1)
 491                 (setq end (point))
 492                 (if (and (> end beg) (not (eq indent current)))
 493                     (indent-code-rigidly beg end (- indent current) "%")))))
 494       (insert-tab))))
 495
 496
 497 (defun simula-context ()
 498   "Return value according to syntactic SIMULA context of point.
 499     0    point inside COMMENT comment
 500     1    point on SIMULA-compiler directive line
 501     2    point inside END comment
 502     3    point inside string
 503     4    point inside character constant
 504   nil    otherwise."
 505   ;; first, find out if this is a compiler directive line
 506   (if (save-excursion
 507         (beginning-of-line)
 508         (eq (following-char) ?%))
 509       ;; YES - return 1
 510       1
 511     (save-excursion
 512       ;; The current line is NOT a compiler directive line.
 513       ;; Now, the strategy is to search backward to find a semicolon
 514       ;; that is NOT inside a string. The point after semicolon MUST be
 515       ;; outside a comment, since semicolons are comment-ending and
 516       ;; comments are non-recursive. We take advantage of the fact
 517       ;; that strings MUST end on the same line as they started, so
 518       ;; that we can easily decide whether we are inside a string or not.
 519       (let (return-value (origin (point)))
 520         (skip-chars-backward "^;" (point-min))
 521         ;; found semicolon or beginning of buffer
 522         (let (loopvalue (saved-point origin))
 523           (while (and (not (bobp))
 524                       (if (progn
 525                             (beginning-of-line)
 526                             ;; compiler directive line? If so, cont searching..
 527                             (eq (following-char) ?%))
 528                           t
 529                         (while (< (point) saved-point)
 530                           (skip-chars-forward "^;\"'")
 531                           (forward-char 1)
 532                           (cond
 533                            ((eq (preceding-char) ?\;)
 534                             (setq saved-point (point)))
 535                            ((eq (preceding-char) ?\")
 536                             (skip-chars-forward "^\";")
 537                             (if (eq (following-char) ?\;)
 538                                 (setq saved-point (point) loopvalue t)
 539                               (forward-char 1)))
 540                            (t
 541                             (if (eq (following-char) ?')
 542                                 (forward-char 1))
 543                             (skip-chars-forward "^';")
 544                             (if (eq (following-char) ?\;)
 545                                 (setq saved-point (point) loopvalue t)
 546                               (forward-char 1)))))
 547                         loopvalue))
 548             (backward-char 1)
 549             (skip-chars-backward "^;")
 550             (setq saved-point (point) loopvalue nil)))
 551         ;; Now we are CERTAIN that we are outside comments and strings.
 552         ;; The job now is to search forward again towards the origin
 553         ;; skipping directives, comments and strings correctly,
 554         ;; so that we know what context we are in when we find the origin.
 555         (while (and
 556                 (< (point) origin)
 557                 (re-search-forward
 558                  "\\<end\\>\\|!\\|\"\\|'\\|^%\\|\\<comment\\>" origin 'move))
 559           (cond
 560            ((memq (preceding-char) '(?d ?D))
 561             (setq return-value 2)
 562             (while (and (re-search-forward
 563                          ";\\|\\<end\\>\\|\\<else\\>\\|\\<otherwise\\>\\|\\<when\\>\\|^%"
 564                          origin 'move)
 565                         ;; found another END?
 566                         (or (memq (preceding-char) '(?d ?D))
 567                             ;; if directive, skip line
 568                             (and (eq (preceding-char) ?%)
 569                                  (beginning-of-line 2))
 570                             ;; found other keyword, out of END comment
 571                             (setq return-value nil))))
 572             (if (and (eq (char-syntax (preceding-char)) ?w)
 573                      (eq (char-syntax (following-char)) ?w))
 574                 (save-excursion
 575                   (backward-word 1)
 576                   (if (looking-at "end\\>\\|else\\>\\|otherwise\\>\\|when\\>")
 577                       (setq return-value nil)))))
 578            ((memq (preceding-char) '(?! ?t ?T))
 579             ; skip comment
 580             (setq return-value 0)
 581             (skip-chars-forward "^%;" origin)
 582             (while (and return-value (< (point) origin))
 583               (if (eq (following-char) ?\;)
 584                   (setq return-value nil)
 585                 (if (bolp)
 586                     (beginning-of-line 2)       ; skip directive inside comment
 587                   (forward-char 1))             ; or single '%'
 588                 (skip-chars-forward "^%;" origin))))
 589            ((eq (preceding-char) ?\")
 590             (if (not (search-forward "\"" origin 'move))
 591                 (setq return-value 3)))
 592            ((eq (preceding-char) ?\')
 593             (if (or (eq (point) origin) (eobp))
 594                 (setq return-value 4)
 595               (forward-char 1)
 596               (if (not (search-forward "'" origin 'move))
 597                   (setq return-value 4))))
 598            ;; compiler directive line - skip
 599            (t (beginning-of-line 2))))
 600         return-value)
 601       )))
 602
 603
 604 (defun simula-electric-label ()
 605   "If this is a label that starts the line, reindent the line."
 606   (interactive)
 607   (expand-abbrev)
 608   (insert ?:)
 609   (let ((origin (- (point-max) (point)))
 610         (case-fold-search t)
 611         ;; don't mix a label with an assignment operator := :-
 612         ;; therefore take a peek at next typed character...
 613         (next-char (read-event)))
 614     (unwind-protect
 615         (setq unread-command-events (append unread-command-events
 616                                             (list next-char)))
 617         ;; Problem: find out if character just read is a command char
 618         ;; that would insert something after ':' making it a label.
 619         ;; At least \n, \r (and maybe \t) falls into this category.
 620         ;; This is a real crock, it depends on traditional keymap
 621         ;; bindings, that is, printing characters doing self-insert,
 622         ;; and no other command sequence inserting '-' or '='.
 623         ;; simula-electric-label can be easily fooled...
 624         (if (and (not (memq next-char '(?= ?-)))
 625                  (or (memq next-char '(?\n ?\r))
 626                      (and (eq next-char ?\t)
 627                           simula-tab-always-indent)
 628                      (not (memq (following-char) '(?= ?-))))
 629                  (not (simula-context))
 630                  ;; label?
 631                  (progn
 632                    (backward-char 1)
 633                    (skip-chars-backward " \t\f")
 634                    (skip-chars-backward "a-zA-Z0-9_")
 635                    (if (looking-at "virtual\\>")
 636                        nil
 637                      (skip-chars-backward " \t\f")
 638                      (bolp))))
 639             (let ((amount (simula-calculate-indent)))
 640               (delete-horizontal-space)
 641               (indent-to amount)))
 642       (goto-char (- (point-max) origin)))))
 643
 644
 645 (defun simula-backward-up-level (count)
 646   "Move backward up COUNT block levels.
 647 If COUNT is negative, move forward up block level instead."
 648   (interactive "p")
 649   (let ((origin (point))
 650         (case-fold-search t))
 651     (condition-case ()
 652         (if (> count 0)
 653             (while (> count 0)
 654               (re-search-backward "\\<begin\\>\\|\\<end\\>")
 655               (if (not (simula-context))
 656                   (setq count (if (memq (following-char) '(?b ?B))
 657                                   (1- count)
 658                                 (1+ count)))))
 659           (while (< count 0)
 660             (re-search-forward "\\<begin\\>\\|\\<end\\>")
 661             (backward-word 1)
 662             (if (not (simula-context))
 663                 (setq count (if (memq (following-char) '(?e ?E))
 664                                 (1+ count)
 665                               (1- count))))
 666             (backward-word -1)))
 667       ;; If block level not found, jump back to origin and signal an error
 668       (error (progn
 669                (goto-char origin)
 670                (error "No higher block level")))
 671       (quit (progn
 672               (goto-char origin)
 673               (signal 'quit nil))))))
 674
 675
 676 (defun simula-forward-down-level (count)
 677   "Move forward down COUNT block levels.
 678 If COUNT is negative, move backward down block level instead."
 679   (interactive "p")
 680   ;; When we search for a deeper block level, we must never
 681   ;; get out of the block where we started -> count >= start-count
 682   (let ((start-count count)
 683         (origin (point))
 684         (case-fold-search t))
 685     (condition-case ()
 686         (if (< count 0)
 687             (while (< count 0)
 688               (re-search-backward "\\<begin\\>\\|\\<end\\>")
 689               (if (not (simula-context))
 690                   (setq count (if (memq (following-char) '(?e ?E))
 691                                   (1+ count)
 692                                 (1- count))))
 693               (if (< count start-count) (signal 'error nil)))
 694           (while (> count 0)
 695             (re-search-forward "\\<begin\\>\\|\\<end\\>")
 696             (backward-word 1)
 697             (if (not (simula-context))
 698                 (setq count (if (memq (following-char) '(?b ?B))
 699                                 (1- count)
 700                               (1+ count))))
 701             (backward-word -1)
 702             ;; deeper level has to be found within starting block
 703             (if (> count start-count) (signal 'error nil))))
 704       ;; If block level not found, jump back to origin and signal an error
 705       (error (progn
 706                (goto-char origin)
 707                (error "No containing block level")))
 708       (quit (progn
 709               (goto-char origin)
 710               (signal 'quit nil))))))
 711
 712
 713 (defun simula-previous-statement (count)
 714   "Move backward COUNT statements.
 715 If COUNT is negative, move forward instead."
 716   (interactive "p")
 717   (if (< count 0)
 718       (simula-next-statement (- count))
 719     (let (status
 720           (case-fold-search t)
 721           (origin (point)))
 722       (condition-case ()
 723           ;;
 724           (progn
 725             (simula-skip-comment-backward)
 726             (if (memq (preceding-char) '(?n ?N))
 727                 (progn
 728                   (backward-word 1)
 729                   (if (not (looking-at "\\<begin\\>"))
 730                       (backward-word -1)))
 731               (if (eq (preceding-char) ?\;)
 732                   (backward-char 1))
 733               )
 734             (while (and (natnump (setq count (1- count)))
 735                         (setq status (simula-search-backward
 736                                       ";\\|\\<begin\\>" nil 'move))))
 737             (if status
 738                 (progn
 739                   (if (eq (following-char) ?\;)
 740                       (forward-char 1)
 741                     (backward-word -1))))
 742             (simula-skip-comment-forward))
 743         (error (progn (goto-char origin)
 744                       (error "Incomplete statement (too many ENDs)")))
 745         (quit (progn (goto-char origin) (signal 'quit nil)))))))
 746
 747
 748 (defun simula-next-statement (count)
 749   "Move forward COUNT statements.
 750 If COUNT is negative, move backward instead."
 751   (interactive "p")
 752   (if (< count 0)
 753       (simula-previous-statement (- count))
 754     (let (status
 755           (case-fold-search t)
 756           (origin (point)))
 757       (condition-case ()
 758           (progn
 759             (simula-skip-comment-forward)
 760             (if (looking-at "\\<end\\>") (forward-word 1))
 761             (while (and (natnump (setq count (1- count)))
 762                         (setq status (simula-search-forward
 763                                       ";\\|\\<end\\>" (point-max) 'move))))
 764             (if (and status (/= (preceding-char) ?\;))
 765                 (progn
 766                   (backward-word 1)
 767                   (simula-skip-comment-backward))))
 768         (error (progn (goto-char origin)
 769                       (error "Incomplete statement (too few ENDs)")))
 770         (quit (progn (goto-char origin) (signal 'quit nil)))))))
 771
 772
 773 (defun simula-skip-comment-backward (&optional stop-at-end)
 774   "Search towards bob to find first char that is outside a comment."
 775   (interactive)
 776   (catch 'simula-out
 777     (let (context)
 778       (while t
 779         (skip-chars-backward " \t\n\f")
 780         (if (eq (preceding-char) ?\;)
 781             (save-excursion
 782               (backward-char 1)
 783               (setq context (simula-context))
 784               (if (and stop-at-end (eq context 2))
 785                   (setq context nil)))
 786           (setq context (simula-context)))
 787         (cond
 788          ((memq context '(nil 3 4))
 789           ;; check to see if we found a label
 790           (if (and (eq (preceding-char) ?:)
 791                    (not (memq (following-char) '(?- ?=)))
 792                    (save-excursion
 793                      (skip-chars-backward ": \t\fa-zA-Z0-9_")
 794                      (not (looking-at "virtual\\>"))))
 795               (skip-chars-backward ": \t\fa-zA-Z0-9_")
 796             (throw 'simula-out nil)))
 797          ((eq context 0)
 798           ;; since we are inside a comment, it must start somewhere!
 799           (while (and (re-search-backward "!\\|\\<comment\\>")
 800                       (memq (simula-context) '(0 1)))))
 801          ((eq context 1)
 802           (beginning-of-line)
 803           (if (bobp)
 804               (throw 'simula-out nil)
 805             (backward-char)))
 806          ((eq context 2)
 807           ;; an END-comment must belong to an END
 808           (re-search-backward "\\<end\\>")
 809           (forward-word 1)
 810           (throw 'simula-out nil))
 811          ;; should be impossible to get here..
 812          )))))
 813
 814
 815 (defun simula-skip-comment-forward ()
 816   "Search towards eob to find first char that is outside a comment."
 817   ;; this function assumes we start with point .outside a comment
 818   (interactive)
 819   (catch 'simula-out
 820     (while t
 821       (skip-chars-forward " \t\n\f")
 822       ;; BUG: the following (0 2) branches don't take into account intermixing
 823       ;; directive lines
 824       (cond
 825        ((looking-at "!\\|\\<comment\\>")
 826         (search-forward ";" nil 'move))
 827        ((and (bolp) (eq (following-char) ?%))
 828         (beginning-of-line 2))
 829        ((and (looking-at "[a-z0-9_]*[ \t\f]*:[^-=]")
 830              (not (looking-at "virtual\\>")))
 831         (skip-chars-forward "a-zA-Z0-9_ \t\f:"))
 832        (t
 833         (throw 'simula-out t))))))
 834
 835
 836 (defun simula-forward-up-level ()
 837   (let ((continue-loop t)
 838         (origin (point))
 839         (case-fold-search t)
 840         return-value
 841         temp)
 842     (while continue-loop
 843       (if (re-search-backward "\\<begin\\>\\|\\<end\\>" (point-min) 'move)
 844           (setq temp (simula-context)
 845               return-value (and (memq (preceding-char) '(?d ?D))
 846                                 (memq temp '(nil 2)))
 847               continue-loop (and (not return-value)
 848                                  (simula-forward-up-level)))
 849         (setq continue-loop nil)))
 850     (if return-value
 851         t
 852       (goto-char origin)
 853       nil)))
 854
 855
 856 (defun simula-calculate-indent ()
 857   (save-excursion
 858     (let ((where (simula-context))
 859           (origin (point))
 860           (indent 0)
 861           continued
 862           start-line
 863           temp
 864           found-end
 865           prev-cont)
 866       (cond
 867        ((eq where 0)
 868         ;;
 869         ;; Comment.
 870         ;; If comment started on previous non-blank line, indent to the
 871         ;; column where the comment started, else indent as that line.
 872         ;;
 873         (skip-chars-backward " \t\n\f")
 874         (while (and (not (bolp)) (eq (simula-context) 0))
 875           (re-search-backward "^\\|!\\|\\<comment\\>"))
 876         (skip-chars-forward " \t\n\f")
 877         (prog1
 878             (current-column)
 879           (goto-char origin)))
 880        ((eq where 1)
 881         ;;
 882         ;; Directive. Always 0.
 883         ;;
 884         0)
 885        ;;
 886        ;; Detect missing string delimiters
 887        ;;
 888        ((eq where 3)
 889         (error "Inside string"))
 890        ((eq where 4)
 891         (error "Inside character constant"))
 892        ;;
 893        ;; check to see if inside ()'s
 894        ;;
 895        ((setq temp (simula-inside-parens))
 896         temp)
 897        ;;
 898        ;; Calculate non-comment indentation
 899        (t
 900         ;; first, find out if this line starts with something that needs
 901         ;; special indentation (END/IF/THEN/ELSE/WHEN/OTHERWISE or label)
 902         ;;
 903         (skip-chars-forward " \t\f")
 904         (cond
 905          ;;
 906          ;; END
 907          ;;
 908          ((looking-at "end\\>")
 909           (setq indent (- simula-indent-level)
 910                 found-end t))
 911          ;;
 912          ;; IF/THEN/ELSE
 913          ;;
 914          ((looking-at "if\\>\\|then\\>\\|else\\>")
 915           ;; search for the *starting* IF
 916           (cond
 917            ((memq (following-char) '(?T ?t))
 918             (setq indent (car simula-if-indent)))
 919            ((memq (following-char) '(?E ?e))
 920             (setq indent (cdr simula-if-indent)))
 921            (t
 922             (forward-word 1)
 923             (setq indent 0)))
 924           (simula-find-if))
 925          ;;
 926          ;; WHEN/OTHERWISE
 927          ;;
 928          ((looking-at "when\\>\\|otherwise\\>")
 929           ;; search for corresponding INSPECT
 930           (if (memq (following-char) '(?W ?w))
 931               (setq indent (car simula-inspect-indent))
 932             (setq indent (cdr simula-inspect-indent)))
 933           (simula-find-inspect))
 934          ;;
 935          ;; label:
 936          ;;
 937          ((and (not (looking-at "virtual\\>"))
 938                (looking-at "[a-z0-9_]*[ \t\f]*:[^-=]"))
 939           (setq indent simula-label-offset)))
 940         ;; find line with non-comment text
 941         (simula-skip-comment-backward 'dont-skip-end)
 942         (if (and found-end
 943                  (not (eq (preceding-char) ?\;))
 944                  (if (memq (preceding-char) '(?N ?n))
 945                      (save-excursion
 946                        (backward-word 1)
 947                        (not (looking-at "begin\\>")))
 948                    t))
 949             (progn
 950               (simula-previous-statement 1)
 951               (simula-skip-comment-backward)))
 952         (setq start-line
 953               (line-beginning-position)
 954               ;; - perhaps this is a continued statement
 955               continued
 956               (save-excursion
 957                 (and (not (bobp))
 958                      ;; (not found-end)
 959                      (if (eq (char-syntax (preceding-char)) ?w)
 960                          (progn
 961                            (backward-word 1)
 962                            (not (looking-at
 963                                  "begin\\|then\\|else\\|when\\|otherwise\\|do"
 964                                  )))
 965                        (not (memq (preceding-char) '(?: ?\;)))))))
 966         ;;
 967         ;; MAIN calculation loop - count BEGIN/DO etc.
 968         ;;
 969         (while (not (bolp))
 970           (if (re-search-backward
 971                ";\\|\\<\\(begin\\|end\\|if\\|else\\|then\\|when\\|otherwise\\|do\\)\\>"
 972                start-line 'move)
 973               (if (simula-context)
 974                   ();; found something in a comment/string - ignore
 975                 (setq temp (following-char))
 976                 (cond
 977                  ((eq temp ?\;)
 978                   (simula-previous-statement 1))
 979                  ((looking-at "begin\\>")
 980                   (setq indent (+ indent simula-indent-level)))
 981                  ((looking-at "end\\>")
 982                   (forward-word 1)
 983                   (simula-previous-statement 1))
 984                  ((looking-at "do\\>")
 985                   (setq indent (+ indent simula-substatement-offset))
 986                   (simula-find-do-match))
 987                  ((looking-at "\\(if\\|then\\|else\\)\\>")
 988                   (if (memq temp '(?I ?i))
 989                       (forward-word 1)
 990                     (setq indent (+ indent
 991                                     simula-substatement-offset
 992                                     (if (memq temp '(?T ?t))
 993                                         (car simula-if-indent)
 994                                       (cdr simula-if-indent)))))
 995                   (simula-find-if))
 996                  ((looking-at "\\<when\\>\\|\\<otherwise\\>")
 997                   (setq indent (+ indent
 998                                   simula-substatement-offset
 999                                   (if (memq temp '(?W ?w))
1000                                       (car simula-if-indent)
1001                                     (cdr simula-if-indent))))
1002                   (simula-find-inspect)))
1003                 ;; found the start of a [sub]statement
1004                 ;; add indentation for continued statement
1005                 (if continued
1006                     (setq indent
1007                           (+ indent
1008                              (if (listp simula-continued-statement-offset)
1009                                  (car simula-continued-statement-offset)
1010                                simula-continued-statement-offset))))
1011                 (setq start-line
1012                       (line-beginning-position)
1013                       continued nil))
1014             ;; search failed .. point is at beginning of line
1015             ;; determine if we should continue searching
1016             ;; (at or before comment or label)
1017             ;; temp = t means finished
1018             (setq temp
1019                   (and (not (simula-context))
1020                        (save-excursion
1021                          (skip-chars-forward " \t\f")
1022                          (or (looking-at "virtual")
1023                              (not
1024                               (looking-at
1025                                "!\\|comment\\>\\|[a-z0-9_]*[ \t\f]*:[^-=]")))))
1026                   prev-cont continued)
1027             ;; if we are finished, find current line's indentation
1028             (if temp
1029                 (setq indent (+ indent (current-indentation))))
1030             ;; find next line with non-comment SIMULA text
1031             ;; maybe indent extra if statement continues
1032             (simula-skip-comment-backward)
1033             (setq continued
1034                   (and (not (bobp))
1035                        (if (eq (char-syntax (preceding-char)) ?w)
1036                            (save-excursion
1037                              (backward-word 1)
1038                              (not (looking-at
1039                                    "begin\\|then\\|else\\|when\\|otherwise\\|do")))
1040                          (not (memq (preceding-char) '(?: ?\;))))))
1041             ;; if we the state of the continued-variable
1042             ;; changed, add indentation for continued statement
1043             (if (or (and prev-cont (not continued))
1044                     (and continued
1045                          (listp simula-continued-statement-offset)))
1046                 (setq indent
1047                       (+ indent
1048                          (if (listp simula-continued-statement-offset)
1049                              (car simula-continued-statement-offset)
1050                            simula-continued-statement-offset))))
1051             ;; while ends if point is at beginning of line at loop test
1052             (if (not temp)
1053                 (setq start-line (line-beginning-position))
1054               (beginning-of-line))))
1055         ;;
1056         ;; return indentation
1057         ;;
1058         indent)))))
1059
1060
1061 (defun simula-find-if ()
1062   "Find starting IF of a IF-THEN[-ELSE[-IF-THEN...]] statement."
1063   (catch 'simula-out
1064     (while t
1065       (if (and (simula-search-backward "\\<if\\>\\|;\\|\\<begin\\>"nil t)
1066                (memq (following-char) '(?I ?i)))
1067           (save-excursion
1068             ;;
1069             ;; find out if this IF was really the start of the IF statement
1070             ;;
1071             (simula-skip-comment-backward)
1072             (if (and (eq (char-syntax (preceding-char)) ?w)
1073                      (progn
1074                        (backward-word 1)
1075                        (looking-at "else\\>")))
1076                 ()
1077               (throw 'simula-out t)))
1078         (if (not (looking-at "\\<if\\>"))
1079             (error "Missing IF or misplaced BEGIN or ';' (can't find IF)")
1080           ;;
1081           ;; we were at the starting IF in the first place..
1082           ;;
1083           (throw 'simula-out t))))))
1084
1085
1086 (defun simula-find-inspect ()
1087   "Find INSPECT matching WHEN or OTHERWISE."
1088   (catch 'simula-out
1089     (let ((level 0))
1090       ;;
1091       ;; INSPECTs can be nested, have to find the corresponding one
1092       ;;
1093       (while t
1094         (if (and (simula-search-backward "\\<inspect\\>\\|\\<otherwise\\>\\|;"
1095                                           nil t)
1096                  (/= (following-char) ?\;))
1097             (if (memq (following-char) '(?O ?o))
1098                 (setq level (1+ level))
1099               (if (zerop level)
1100                   (throw 'simula-out t)
1101                 (setq level (1- level))))
1102           (error "Missing INSPECT or misplaced ';' (can't find INSPECT)"))))))
1103
1104
1105 (defun simula-find-do-match ()
1106   "Find keyword matching DO: FOR, WHILE, INSPECT or WHEN."
1107   (while (and (re-search-backward
1108                "\\<\\(do\\|for\\|while\\|inspect\\|when\\|end\\|begin\\)\\>\\|;"
1109                nil 'move)
1110               (simula-context)))
1111   (if (and (looking-at "\\<\\(for\\|while\\|inspect\\|when\\)\\>")
1112            (not (simula-context)))
1113       () ;; found match
1114     (error "No matching FOR, WHILE or INSPECT for DO, or misplaced ';'")))
1115
1116
1117 (defun simula-inside-parens ()
1118   "Return position after `(' on line if inside parentheses, nil otherwise."
1119   (save-excursion
1120     (let ((parlevel 0))
1121       (catch 'simula-out
1122         (while t
1123           (if (re-search-backward "(\\|)\\|;" nil t)
1124               (if (eq (simula-context) nil)
1125                   ;; found something - check it out
1126                   (cond
1127                    ((eq (following-char) ?\;)
1128                     (if (zerop parlevel)
1129                         (throw 'simula-out nil)
1130                       (error "Parenthesis mismatch or misplaced ';'")))
1131                    ((eq (following-char) ?\()
1132                     (if (zerop parlevel)
1133                         (throw 'simula-out (1+ (current-column)))
1134                       (setq parlevel (1- parlevel))))
1135                    (t (setq parlevel (1+ parlevel))))
1136                 );; nothing - inside comment or string
1137             ;; search failed
1138             (throw 'simula-out nil)))))))
1139
1140
1141 (defun simula-goto-definition ()
1142   "Goto point of definition of variable, procedure or class."
1143   (interactive))
1144
1145
1146 (defun simula-expand-stdproc ()
1147   (if (or (not simula-abbrev-stdproc) (simula-context))
1148       (unexpand-abbrev)
1149     (cond
1150      ((eq simula-abbrev-stdproc 'upcase) (upcase-word -1))
1151      ((eq simula-abbrev-stdproc 'downcase) (downcase-word -1))
1152      ((eq simula-abbrev-stdproc 'capitalize) (capitalize-word -1))
1153      ((eq simula-abbrev-stdproc 'abbrev-table)
1154       ;; If not in lowercase, expansions are always capitalized.
1155       ;; We then want to replace with the exact expansion.
1156       (if (equal (symbol-name last-abbrev) last-abbrev-text)
1157           ()
1158         (downcase-word -1)
1159         (expand-abbrev))))))
1160
1161
1162 (defun simula-expand-keyword ()
1163   (if (or (not simula-abbrev-keyword) (simula-context))
1164       (unexpand-abbrev)
1165     (cond
1166      ((eq simula-abbrev-keyword 'upcase) (upcase-word -1))
1167      ((eq simula-abbrev-keyword 'downcase) (downcase-word -1))
1168      ((eq simula-abbrev-keyword 'capitalize) (capitalize-word -1))
1169      ((eq simula-abbrev-stdproc 'abbrev-table)
1170       (if (equal (symbol-name last-abbrev) last-abbrev-text)
1171           ()
1172         (downcase-word -1)
1173         (expand-abbrev))))))
1174
1175
1176 (defun simula-electric-keyword ()
1177   "Expand SIMULA keyword.  If it starts the line, reindent."
1178   ;; redisplay
1179   (let ((show-char (eq this-command 'self-insert-command)))
1180     ;; If the abbrev expansion results in reindentation, the user may have
1181     ;; to wait some time before the character he typed is displayed
1182     ;; (the char causing the expansion is inserted AFTER the hook function
1183     ;; is called). This is annoying in case of normal characters.
1184     ;; However, if the user pressed a key bound to newline, it is better
1185     ;; to have the line inserted after the begin-end match.
1186     (if show-char
1187         (progn
1188           (insert-char last-command-event 1)
1189           (sit-for 0)
1190           (backward-char 1)))
1191     (if (let ((where (simula-context))
1192               (case-fold-search t))
1193           (if where
1194               (if (and (eq where 2) (eq (char-syntax (preceding-char)) ?w))
1195                   (save-excursion
1196                     (backward-word 1)
1197                     (not (looking-at "end\\>"))))))
1198         (unexpand-abbrev)
1199       (cond
1200        ((not simula-abbrev-keyword) (unexpand-abbrev))
1201        ((eq simula-abbrev-keyword 'upcase) (upcase-word -1))
1202        ((eq simula-abbrev-keyword 'downcase) (downcase-word -1))
1203        ((eq simula-abbrev-keyword 'capitalize) (capitalize-word -1)))
1204       (let ((pos (- (point-max) (point)))
1205             (case-fold-search t))
1206         (condition-case nil
1207             (progn
1208               ;; check if the expanded word is on the beginning of the line.
1209               (if (and (eq (char-syntax (preceding-char)) ?w)
1210                        (progn
1211                          (backward-word 1)
1212                          (if (looking-at "end\\>")
1213                              (save-excursion
1214                                (simula-backward-up-level 1)
1215                                (if (pos-visible-in-window-p)
1216                                    (sit-for 1)
1217                                  (message "Matches %s"
1218                                           (buffer-substring
1219                                            (point)
1220                                            (+ (point) (window-width)))))))
1221                          (skip-chars-backward " \t\f")
1222                          (bolp)))
1223                   (let ((indent (simula-calculate-indent)))
1224                     (if (eq indent (current-indentation))
1225                         ()
1226                       (delete-horizontal-space)
1227                       (indent-to indent)))
1228                 (skip-chars-forward " \t\f"))
1229               ;; check for END - blow whistles and ring bells
1230
1231               (goto-char (- (point-max) pos))
1232               (if show-char
1233                   (delete-char 1)))
1234           (quit (goto-char (- (point-max) pos))))))))
1235
1236
1237 (defun simula-search-backward (regexp &optional bound noerror)
1238   "Search backward from point for regular expression REGEXP,
1239 ignoring matches found inside SIMULA comments, string literals,
1240 and BEGIN..END blocks.
1241 Set point to the end of the occurrence found, and return point.
1242 An optional second argument BOUND bounds the search, it is a buffer position.
1243 The match found must not extend after that position.  Optional third argument
1244 NOERROR, if t, means if fail just return nil (no error).
1245 If not nil and not t, move to limit of search and return nil."
1246   (let ((comb-regexp (concat regexp "\\|\\<end\\>"))
1247         (start-point (point))
1248         context match)
1249     (catch 'simula-backward
1250       (while (re-search-backward comb-regexp bound 1)
1251         ;; We have a match, check SIMULA context at match-beginning
1252         ;; to see if we are outside comments etc.
1253         ;; Set MATCH to t if we found a true match,
1254         ;; set MATCH to 'BLOCK if we found a BEGIN..END block,
1255         ;; else set MATCH to nil.
1256         (save-match-data
1257           (setq context (simula-context))
1258           (cond
1259            ((eq context nil)
1260             (setq match (if (looking-at regexp) t 'BLOCK)))
1261            ;; A comment-ending `;' is part of the comment, and shouldn't match.
1262            ;; ((eq context 0)
1263            ;;  (setq match (if (eq (following-char) ?\;) t nil)))
1264            ((eq context 2)
1265             (setq match (if (and (looking-at regexp)
1266                                  (looking-at ";\\|\\<end\\>\\|\\<else\\>\\|\\<otherwise\\>\\|\\<when\\>"))
1267                             t
1268                           (if (looking-at "\\<end\\>") 'BLOCK nil))))
1269            (t (setq match nil))))
1270         ;; Exit if true match
1271         (if (eq match t) (throw 'simula-backward (point)))
1272         (if (eq match 'BLOCK)
1273         ;; We found the END of a block
1274             (let ((level 0))
1275               (while (natnump level)
1276                   (if (re-search-backward "\\<begin\\>\\|\\<end\\>" bound 1)
1277                       (let ((context (simula-context)))
1278                         ;;    We found a BEGIN -> decrease level count
1279                         (cond ((and (eq context nil)
1280                                    (memq (following-char) '(?b ?B)))
1281                                (setq level (1- level)))
1282                               ;; END -> increase level count
1283                               ((and (memq context '(nil 2))
1284                                     (memq (following-char) '(?e ?E)))
1285                                (setq level (1+ level)))))
1286                     ;; Block search failed.  Action depends on noerror.
1287                     (if (or (not noerror) (eq noerror t))
1288                         (goto-char start-point))
1289                     (if (not noerror)
1290                         (signal 'search-failed (list regexp)))
1291                     (throw 'simula-backward nil))))))
1292       ;; Search failed.  Action depends on noerror.
1293       (if (or (not noerror) (eq noerror t))
1294           (goto-char start-point))
1295       (if noerror
1296           nil
1297         (signal 'search-failed (list regexp))))))
1298
1299
1300 (defun simula-search-forward (regexp &optional bound noerror)
1301   "Search forward from point for regular expression REGEXP,
1302 ignoring matches found inside SIMULA comments, string literals,
1303 and BEGIN..END blocks.
1304 Set point to the end of the occurrence found, and return point.
1305 An optional second argument BOUND bounds the search, it is a buffer position.
1306 The match found must not extend after that position.  Optional third argument
1307 NOERROR, if t, means if fail just return nil (no error).
1308 If not nil and not t, move to limit of search and return nil."
1309   (let ((comb-regexp (concat regexp "\\|\\<begin\\>"))
1310         (start-point (point))
1311         context match)
1312     (catch 'simula-forward
1313       (while (re-search-forward comb-regexp bound 1)
1314         ;; We have a match, check SIMULA context at match-beginning
1315         ;; to see if we are outside comments.
1316         ;; Set MATCH to t if we found a true match,
1317         ;; set MATCH to 'BLOCK if we found a BEGIN..END block,
1318         ;; else set MATCH to nil.
1319         (save-match-data
1320           (save-excursion
1321             (goto-char (match-beginning 0))
1322             (setq context (simula-context))
1323             (cond
1324              ((not context)
1325               (setq match (if (looking-at regexp) t 'BLOCK)))
1326              ;; Comment-ending `;' is part of the comment, and shouldn't match.
1327              ;; ((eq context 0)
1328              ;;  (setq match (if (eq (following-char) ?\;) t nil)))
1329              ((eq context 2)
1330               (setq match (if (and (looking-at regexp)
1331                                    (looking-at ";\\|\\<end\\>\\|\\<else\\>\\|\\<otherwise\\>\\|\\<when\\>")) t nil)))
1332              (t (setq match nil)))))
1333         ;; Exit if true match
1334         (if (eq match t) (throw 'simula-forward (point)))
1335         (if (eq match 'BLOCK)
1336         ;; We found the BEGINning of a block
1337             (let ((level 0))
1338               (while (natnump level)
1339                   (if (re-search-forward "\\<begin\\>\\|\\<end\\>" bound 1)
1340                       (let ((context (simula-context)))
1341                         ;;    We found a BEGIN -> increase level count
1342                         (cond ((eq context nil) (setq level (1+ level)))
1343                               ;; END -> decrease level count
1344                               ((and (eq context 2)
1345                                     ;; Don't match BEGIN inside END comment
1346                                     (memq (preceding-char) '(?d ?D)))
1347                                (setq level (1- level)))))
1348                     ;; Block search failed.  Action depends on noerror.
1349                     (if (or (not noerror) (eq noerror t))
1350                         (goto-char start-point))
1351                     (if (not noerror)
1352                         (signal 'search-failed (list regexp)))
1353                     (throw 'simula-forward nil))))))
1354       ;; Search failed.  Action depends on noerror.
1355       (if (or (not noerror) (eq noerror t))
1356           (goto-char start-point))
1357       (if noerror
1358           nil
1359         (signal 'search-failed (list regexp))))))
1360
1361
1362 (defun simula-install-standard-abbrevs ()
1363   "Define Simula keywords, procedures and classes in local abbrev table."
1364   ;; procedure and class names are as of the SIMULA 87 standard.
1365   (interactive)
1366   (dolist (args
1367           '(("abs" "Abs" simula-expand-stdproc)
1368             ("accum" "Accum" simula-expand-stdproc)
1369             ("activate" "ACTIVATE" simula-expand-keyword)
1370             ("addepsilon" "AddEpsilon" simula-expand-stdproc)
1371             ("after" "AFTER" simula-expand-keyword)
1372             ("and" "AND" simula-expand-keyword)
1373             ("arccos" "ArcCos" simula-expand-stdproc)
1374             ("arcsin" "ArcSin" simula-expand-stdproc)
1375             ("arctan" "ArcTan" simula-expand-stdproc)
1376             ("arctan2" "ArcTan2" simula-expand-stdproc)
1377             ("array" "ARRAY" simula-expand-keyword)
1378             ("at" "AT" simula-expand-keyword)
1379             ("before" "BEFORE" simula-expand-keyword)
1380             ("begin" "BEGIN" simula-expand-keyword)
1381             ("blanks" "Blanks" simula-expand-stdproc)
1382             ("boolean" "BOOLEAN" simula-expand-keyword)
1383             ("breakoutimage" "BreakOutImage" simula-expand-stdproc)
1384             ("bytefile" "ByteFile" simula-expand-stdproc)
1385             ("call" "Call" simula-expand-stdproc)
1386             ("cancel" "Cancel" simula-expand-stdproc)
1387             ("cardinal" "Cardinal" simula-expand-stdproc)
1388             ("char" "Char" simula-expand-stdproc)
1389             ("character" "CHARACTER" simula-expand-keyword)
1390             ("checkpoint" "CheckPoint" simula-expand-stdproc)
1391             ("class" "CLASS" simula-expand-keyword)
1392             ("clear" "Clear" simula-expand-stdproc)
1393             ("clocktime" "ClockTime" simula-expand-stdproc)
1394             ("close" "Close" simula-expand-stdproc)
1395             ("comment" "COMMENT" simula-expand-keyword)
1396             ("constant" "Constant" simula-expand-stdproc)
1397             ("copy" "Copy" simula-expand-stdproc)
1398             ("cos" "Cos" simula-expand-stdproc)
1399             ("cosh" "CosH" simula-expand-stdproc)
1400             ("cotan" "CoTan" simula-expand-stdproc)
1401             ("cputime" "CpuTime" simula-expand-stdproc)
1402             ("current" "Current" simula-expand-stdproc)
1403             ("datetime" "DateTime" simula-expand-stdproc)
1404             ("decimalmark" "DecimalMark" simula-expand-stdproc)
1405             ("delay" "DELAY" simula-expand-keyword)
1406             ("deleteimage" "DeleteImage" simula-expand-stdproc)
1407             ("detach" "Detach" simula-expand-stdproc)
1408             ("digit" "Digit" simula-expand-stdproc)
1409             ("directbytefile" "DirectByteFile" simula-expand-stdproc)
1410             ("directfile" "DirectFile" simula-expand-stdproc)
1411             ("discrete" "Discrete" simula-expand-stdproc)
1412             ("do" "DO" simula-expand-keyword)
1413             ("downcase" "Downcase" simula-expand-stdproc)
1414             ("draw" "Draw" simula-expand-stdproc)
1415             ("eject" "Eject" simula-expand-stdproc)
1416             ("else" "ELSE" simula-electric-keyword)
1417             ("empty" "Empty" simula-expand-stdproc)
1418             ("end" "END" simula-electric-keyword)
1419             ("endfile" "Endfile" simula-expand-stdproc)
1420             ("entier" "Entier" simula-expand-stdproc)
1421             ("eq" "EQ" simula-expand-keyword)
1422             ("eqv" "EQV" simula-expand-keyword)
1423             ("erlang" "Erlang" simula-expand-stdproc)
1424             ("error" "Error" simula-expand-stdproc)
1425             ("evtime" "EvTime" simula-expand-stdproc)
1426             ("exp" "Exp" simula-expand-stdproc)
1427             ("external" "EXTERNAL" simula-expand-keyword)
1428             ("false" "FALSE" simula-expand-keyword)
1429             ("field" "Field" simula-expand-stdproc)
1430             ("file" "File" simula-expand-stdproc)
1431             ("first" "First" simula-expand-stdproc)
1432             ("follow" "Follow" simula-expand-stdproc)
1433             ("for" "FOR" simula-expand-keyword)
1434             ("ge" "GE" simula-expand-keyword)
1435             ("getchar" "GetChar" simula-expand-stdproc)
1436             ("getfrac" "GetFrac" simula-expand-stdproc)
1437             ("getint" "GetInt" simula-expand-stdproc)
1438             ("getreal" "GetReal" simula-expand-stdproc)
1439             ("go" "GO" simula-expand-keyword)
1440             ("goto" "GOTO" simula-expand-keyword)
1441             ("gt" "GT" simula-expand-keyword)
1442             ("head" "Head" simula-expand-stdproc)
1443             ("hidden" "HIDDEN" simula-expand-keyword)
1444             ("histd" "HistD" simula-expand-stdproc)
1445             ("histo" "Histo" simula-expand-stdproc)
1446             ("hold" "Hold" simula-expand-stdproc)
1447             ("idle" "Idle" simula-expand-stdproc)
1448             ("if" "IF" simula-expand-keyword)
1449             ("image" "Image" simula-expand-stdproc)
1450             ("imagefile" "ImageFile" simula-expand-stdproc)
1451             ("imp" "IMP" simula-expand-keyword)
1452             ("in" "IN" simula-expand-keyword)
1453             ("inbyte" "InByte" simula-expand-stdproc)
1454             ("inbytefile" "InByteFile" simula-expand-stdproc)
1455             ("inchar" "InChar" simula-expand-stdproc)
1456             ("infile" "InFile" simula-expand-stdproc)
1457             ("infrac" "InFrac" simula-expand-stdproc)
1458             ("inimage" "InImage" simula-expand-stdproc)
1459             ("inint" "InInt" simula-expand-stdproc)
1460             ("inner" "INNER" simula-expand-keyword)
1461             ("inreal" "InReal" simula-expand-stdproc)
1462             ("inrecord" "InRecord" simula-expand-stdproc)
1463             ("inspect" "INSPECT" simula-expand-keyword)
1464             ("integer" "INTEGER" simula-expand-keyword)
1465             ("intext" "InText" simula-expand-stdproc)
1466             ("into" "Into" simula-expand-stdproc)
1467             ("is" "IS" simula-expand-keyword)
1468             ("isochar" "ISOChar" simula-expand-stdproc)
1469             ("isopen" "IsOpen" simula-expand-stdproc)
1470             ("isorank" "ISORank" simula-expand-stdproc)
1471             ("label" "LABEL" simula-expand-keyword)
1472             ("last" "Last" simula-expand-stdproc)
1473             ("lastitem" "LastItem" simula-expand-stdproc)
1474             ("lastloc" "LastLoc" simula-expand-stdproc)
1475             ("le" "LE" simula-expand-keyword)
1476             ("length" "Length" simula-expand-stdproc)
1477             ("letter" "Letter" simula-expand-stdproc)
1478             ("line" "Line" simula-expand-stdproc)
1479             ("linear" "Linear" simula-expand-stdproc)
1480             ("linesperpage" "LinesPerPage" simula-expand-stdproc)
1481             ("link" "Link" simula-expand-stdproc)
1482             ("linkage" "Linkage" simula-expand-stdproc)
1483             ("ln" "Ln" simula-expand-stdproc)
1484             ("locate" "Locate" simula-expand-stdproc)
1485             ("location" "Location" simula-expand-stdproc)
1486             ("lock" "Lock" simula-expand-stdproc)
1487             ("locked" "Locked" simula-expand-stdproc)
1488             ("log10" "Log10" simula-expand-stdproc)
1489             ("long" "LONG" simula-expand-keyword)
1490             ("lowcase" "LowCase" simula-expand-stdproc)
1491             ("lowerbound" "LowerBound" simula-expand-stdproc)
1492             ("lowten" "LowTen" simula-expand-stdproc)
1493             ("lt" "LT" simula-expand-keyword)
1494             ("main" "Main" simula-expand-stdproc)
1495             ("max" "Max" simula-expand-stdproc)
1496             ("maxint" "MaxInt" simula-expand-stdproc)
1497             ("maxlongreal" "MaxLongReal" simula-expand-stdproc)
1498             ("maxloc" "MaxLoc" simula-expand-stdproc)
1499             ("maxrank" "MaxRank" simula-expand-stdproc)
1500             ("maxreal" "MaxReal" simula-expand-stdproc)
1501             ("min" "Min" simula-expand-stdproc)
1502             ("minint" "MinInt" simula-expand-stdproc)
1503             ("minlongreal" "MinLongReal" simula-expand-stdproc)
1504             ("minrank" "MinRank" simula-expand-stdproc)
1505             ("minreal" "MinReal" simula-expand-stdproc)
1506             ("mod" "Mod" simula-expand-stdproc)
1507             ("more" "More" simula-expand-stdproc)
1508             ("name" "NAME" simula-expand-keyword)
1509             ("ne" "NE" simula-expand-keyword)
1510             ("negexp" "NegExp" simula-expand-stdproc)
1511             ("new" "NEW" simula-expand-keyword)
1512             ("nextev" "NextEv" simula-expand-stdproc)
1513             ("none" "NONE" simula-expand-keyword)
1514             ("normal" "Normal" simula-expand-stdproc)
1515             ("not" "NOT" simula-expand-keyword)
1516             ("notext" "NOTEXT" simula-expand-keyword)
1517             ("open" "Open" simula-expand-stdproc)
1518             ("or" "OR" simula-expand-keyword)
1519             ("otherwise" "OTHERWISE" simula-electric-keyword)
1520             ("out" "Out" simula-expand-stdproc)
1521             ("outbyte" "OutByte" simula-expand-stdproc)
1522             ("outbytefile" "OutByteFile" simula-expand-stdproc)
1523             ("outchar" "OutChar" simula-expand-stdproc)
1524             ("outfile" "OutFile" simula-expand-stdproc)
1525             ("outfix" "OutFix" simula-expand-stdproc)
1526             ("outfrac" "OutFrac" simula-expand-stdproc)
1527             ("outimage" "OutImage" simula-expand-stdproc)
1528             ("outint" "OutInt" simula-expand-stdproc)
1529             ("outreal" "OutReal" simula-expand-stdproc)
1530             ("outrecord" "OutRecord" simula-expand-stdproc)
1531             ("outtext" "OutText" simula-expand-stdproc)
1532             ("page" "Page" simula-expand-stdproc)
1533             ("passivate" "Passivate" simula-expand-stdproc)
1534             ("poisson" "Poisson" simula-expand-stdproc)
1535             ("pos" "Pos" simula-expand-stdproc)
1536             ("precede" "Precede" simula-expand-stdproc)
1537             ("pred" "Pred" simula-expand-stdproc)
1538             ("prev" "Prev" simula-expand-stdproc)
1539             ("printfile" "PrintFile" simula-expand-stdproc)
1540             ("prior" "PRIOR" simula-expand-keyword)
1541             ("procedure" "PROCEDURE" simula-expand-keyword)
1542             ("process" "Process" simula-expand-stdproc)
1543             ("protected" "PROTECTED" simula-expand-keyword)
1544             ("putchar" "PutChar" simula-expand-stdproc)
1545             ("putfix" "PutFix" simula-expand-stdproc)
1546             ("putfrac" "PutFrac" simula-expand-stdproc)
1547             ("putint" "PutInt" simula-expand-stdproc)
1548             ("putreal" "PutReal" simula-expand-stdproc)
1549             ("qua" "QUA" simula-expand-keyword)
1550             ("randint" "RandInt" simula-expand-stdproc)
1551             ("rank" "Rank" simula-expand-stdproc)
1552             ("reactivate" "REACTIVATE" simula-expand-keyword)
1553             ("real" "REAL" simula-expand-keyword)
1554             ("ref" "REF" simula-expand-keyword)
1555             ("resume" "Resume" simula-expand-stdproc)
1556             ("setaccess" "SetAccess" simula-expand-stdproc)
1557             ("setpos" "SetPos" simula-expand-stdproc)
1558             ("short" "SHORT" simula-expand-keyword)
1559             ("sign" "Sign" simula-expand-stdproc)
1560             ("simset" "SimSet" simula-expand-stdproc)
1561             ("simulaid" "SimulaId" simula-expand-stdproc)
1562             ("simulation" "Simulation" simula-expand-stdproc)
1563             ("sin" "Sin" simula-expand-stdproc)
1564             ("sinh" "SinH" simula-expand-stdproc)
1565             ("sourceline" "SourceLine" simula-expand-stdproc)
1566             ("spacing" "Spacing" simula-expand-stdproc)
1567             ("sqrt" "Sqrt" simula-expand-stdproc)
1568             ("start" "Start" simula-expand-stdproc)
1569             ("step" "STEP" simula-expand-keyword)
1570             ("strip" "Strip" simula-expand-stdproc)
1571             ("sub" "Sub" simula-expand-stdproc)
1572             ("subepsilon" "SubEpsilon" simula-expand-stdproc)
1573             ("suc" "Suc" simula-expand-stdproc)
1574             ("switch" "SWITCH" simula-expand-keyword)
1575             ("sysin" "SysIn" simula-expand-stdproc)
1576             ("sysout" "SysOut" simula-expand-stdproc)
1577             ("tan" "Tan" simula-expand-stdproc)
1578             ("tanh" "TanH" simula-expand-stdproc)
1579             ("terminate_program" "Terminate_Program" simula-expand-stdproc)
1580             ("terminated" "Terminated" simula-expand-stdproc)
1581             ("text" "TEXT" simula-expand-keyword)
1582             ("then" "THEN" simula-electric-keyword)
1583             ("this" "THIS" simula-expand-keyword)
1584             ("time" "Time" simula-expand-stdproc)
1585             ("to" "TO" simula-expand-keyword)
1586             ("true" "TRUE" simula-expand-keyword)
1587             ("uniform" "Uniform" simula-expand-stdproc)
1588             ("unlock" "Unlock" simula-expand-stdproc)
1589             ("until" "UNTIL" simula-expand-keyword)
1590             ("upcase" "Upcase" simula-expand-stdproc)
1591             ("upperbound" "UpperBound" simula-expand-stdproc)
1592             ("value" "VALUE" simula-expand-keyword)
1593             ("virtual" "VIRTUAL" simula-expand-keyword)
1594             ("wait" "Wait" simula-expand-stdproc)
1595             ("when" "WHEN" simula-electric-keyword)
1596             ("while" "WHILE" simula-expand-keyword)))
1597     (define-abbrev simula-mode-abbrev-table
1598       (nth 0 args) (nth 1 args) (nth 2 args) nil 'system)))
1599
1600 (if simula-abbrev-file
1601     (read-abbrev-file simula-abbrev-file))
1602 (let (abbrevs-changed)
1603   (simula-install-standard-abbrevs))
1604
1605 ;; Hilit mode support.
1606 (when (fboundp 'hilit-set-mode-patterns)
1607   (when (and (boundp 'hilit-patterns-alist)
1608              (not (assoc 'simula-mode hilit-patterns-alist)))
1609     (hilit-set-mode-patterns
1610      'simula-mode
1611      '(
1612        ("^%\\([ \t\f].*\\)?$" nil comment)
1613        ("^%include\\>" nil include)
1614        ("\"[^\"\n]*\"\\|'.'\\|'![0-9]+!'" nil string)
1615        ("\\<\\(ACTIVATE\\|AFTER\\|AND\\|ARRAY\\|AT\\|BEFORE\\|BEGIN\\|BOOLEAN\\|CHARACTER\\|CLASS\\|DELAY\\|DO\\|ELSE\\|END\\|EQ\\|EQV\\|EXTERNAL\\|FALSE\\|FOR\\|GE\\|GO\\|GOTO\\|GT\\|HIDDEN\\|IF\\|IMP\\|IN\\|INNER\\|INSPECT\\|INTEGER\\|IS\\|LABEL\\|LE\\|LONG\\|LT\\|NAME\\|NE\\|NEW\\|NONE\\|NOT\\|NOTEXT\\|OR\\|OTHERWISE\\|PRIOR\\|PROCEDURE\\|PROTECTED\\|QUA\\|REACTIVATE\\|REAL\\|REF\\|SHORT\\|STEP\\|SWITCH\\|TEXT\\|THEN\\|THIS\\|TO\\|TRUE\\|UNTIL\\|VALUE\\|VIRTUAL\\|WHEN\\|WHILE\\)\\>" nil keyword)
1616        ("!\\|\\<COMMENT\\>" ";" comment))
1617      nil 'case-insensitive)))
1618 \f
1619 ;; defuns for submitting bug reports
1620
1621 (defconst simula-mode-help-address "bug-gnu-emacs@gnu.org"
1622   "Address accepting submission of `simula-mode' bug reports.")
1623
1624 (defun simula-submit-bug-report ()
1625   "Submit via mail a bug report on `simula-mode'."
1626   (interactive)
1627   (and
1628    (y-or-n-p "Do you want to submit a report on simula-mode? ")
1629    (reporter-submit-bug-report
1630     simula-mode-help-address
1631     (concat "simula-mode from Emacs " emacs-version)
1632     (list
1633      ;; report only the vars that affect indentation
1634      'simula-indent-level
1635      'simula-substatement-offset
1636      'simula-continued-statement-offset
1637      'simula-label-offset
1638      'simula-if-indent
1639      'simula-inspect-indent
1640      'simula-electric-indent
1641      'simula-abbrev-keyword
1642      'simula-abbrev-stdproc
1643      'simula-abbrev-file
1644      'simula-tab-always-indent
1645      ))))
1646
1647 (provide 'simula)
1648
1649 ;;; simula.el ends here