Diff for /gforth/gforth.el between versions 1.30 and 1.66

version 1.30, 1998/05/13 16:47:23 version 1.66, 2003/02/08 17:32:28
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 ;; Forth mode for Emacs  ;;; gforth.el --- major mode for editing (G)Forth sources
 ;; This file is part of GForth.  
 ;; Changes by anton  ;; Copyright (C) 1995,1996,1997,1998,2000,2001 Free Software Foundation, Inc.
 ;; This is a variant of forth.el that came with TILE.  
 ;; I left most of this stuff untouched and made just a few changes for   ;; This file is part of Gforth.
 ;; the things I use (mainly indentation and syntax tables).  
 ;; So there is still a lot of work to do to adapt this to gforth.  
   
 ;; GForth is distributed in the hope that it will be useful,  ;; GForth is distributed in the hope that it will be useful,
 ;; but WITHOUT ANY WARRANTY.  No author or distributor  ;; but WITHOUT ANY WARRANTY.  No author or distributor
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 ;; file named COPYING.  Among other things, the copyright notice  ;; file named COPYING.  Among other things, the copyright notice
 ;; and this notice must be preserved on all copies.  ;; and this notice must be preserved on all copies.
   
   ;; Author: Goran Rydqvist <gorry@ida.liu.se>
   ;; Maintainer: David Kühling <dvdkhlng@gmx.de>
   ;; Created: 16 July 88 by Goran Rydqvist
   ;; Keywords: forth, gforth
   
   ;; Changes by anton
   ;; This is a variant of forth.el that came with TILE.
   ;; I left most of this stuff untouched and made just a few changes for 
   ;; the things I use (mainly indentation and syntax tables).
   ;; So there is still a lot of work to do to adapt this to gforth.
   
   ;; Changes by David
   ;; Added a syntax-hilighting engine, rewrote auto-indentation engine.
   ;; Added support for block files.
   ;; Replaced forth-process code with comint-based implementation.
   
   ;; Tested with Emacs 19.34, 20.5, 21 and XEmacs 21
    
 ;;-------------------------------------------------------------------  ;;-------------------------------------------------------------------
 ;; A Forth indentation, documentation search and interaction library  ;; A Forth indentation, documentation search and interaction library
 ;;-------------------------------------------------------------------  ;;-------------------------------------------------------------------
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 ;; Documentation: See forth-mode (^HF forth-mode)  ;; Documentation: See forth-mode (^HF forth-mode)
 ;;-------------------------------------------------------------------  ;;-------------------------------------------------------------------
   
   ;;; Code:
   
   ;(setq debug-on-error t)
   
   ;; Code ripped from `version.el' for compatability with Emacs versions
   ;; prior to 19.23.
   (if (not (boundp 'emacs-major-version))
       (defconst emacs-major-version
         (progn (string-match "^[0-9]+" emacs-version)
                (string-to-int (match-string 0 emacs-version)))))
   
   (defun forth-emacs-older (major minor)
     (or (< emacs-major-version major)
         (and (= emacs-major-version major) (< emacs-minor-version minor))))
   
   ;; Code ripped from `subr.el' for compatability with Emacs versions
   ;; prior to 20.1
   (eval-when-compile 
     (if (forth-emacs-older 20 1)
         (progn
           (defmacro when (cond &rest body)
             "If COND yields non-nil, do BODY, else return nil."
             (list 'if cond (cons 'progn body)))
           (defmacro unless (cond &rest body)
             "If COND yields nil, do BODY, else return nil."
             (cons 'if (cons cond (cons nil body)))))))
   
   ;; `no-error' argument of require not supported in Emacs versions
   ;; prior to 20.4 :-(
   (defun forth-require (feature)
     (condition-case err (require feature) (error nil)))
   
   (require 'font-lock)
   
   ;; define `font-lock-warning-face' in emacs-versions prior to 20.1
   ;; (ripped from `font-lock.el')
   (unless (boundp 'font-lock-warning-face)
     (message "defining font-lock-warning-face")
     (make-face 'font-lock-warning-face)
     (defvar font-lock-warning-face 'font-lock-warning-face)
     (set-face-foreground font-lock-warning-face "red")
     (make-face-bold font-lock-warning-face))
   
   ;; define `font-lock-constant-face' in XEmacs (just copy
   ;; `font-lock-preprocessor-face')
   (unless (boundp 'font-lock-constant-face)
     (copy-face font-lock-preprocessor-face 'font-lock-constant-face))
   
   
   ;; define `regexp-opt' in emacs versions prior to 20.1 
   ;; (this implementation is extremely inefficient, though)
   (eval-and-compile (forth-require 'regexp-opt))
   (unless (memq 'regexp-opt features)
     (message (concat 
               "Warning: your Emacs version doesn't support `regexp-opt'. "
               "Hilighting will be slow."))
     (defun regexp-opt (STRINGS &optional PAREN)
       (let ((open (if PAREN "\\(" "")) (close (if PAREN "\\)" "")))
         (concat open (mapconcat 'regexp-quote STRINGS "\\|") close)))
     (defun regexp-opt-depth (re)
       (if (string= (substring re 0 2) "\\(") 1 0)))
   
   ; todo:
   ;
   
   ; Wörter ordentlich hilighten, die nicht auf Whitespace beginnen ( ..)IF
   ; -- mit aktueller Konzeption nicht möglich??
   ;
   ; Konfiguration über customization groups
   ;
   ; Bereich nur auf Wortanfang/ende ausweiten, wenn Anfang bzw Ende in einem 
   ; Wort liegen (?) -- speed!
   ;
   ; 'forth-word' property muss eindeutig sein!
   ;
   ; Forth-Menu 
   ;
   ; Interface zu GForth Prozessen (Patches von Michael Scholz)
   ;
   ; Byte-compile-Code rausschmeißen, Compilieren im Makefile über Emacs
   ; batch-Modus
   ;
   ; forth-help Kram rausschmeißen
   ;
   ; XEmacs Kompatibilität? imenu/speedbar -> fume?
   ; 
   ; Folding neuschreiben (neue Parser-Informationen benutzen)
   
   ;;; Motion-hooking (dk)
   ;;;
   (defun forth-idle-function ()
     "Function that is called when Emacs is idle to detect cursor motion
   in forth-block-mode buffers (which is mainly used for screen number
   display in).  Currently ignores forth-mode buffers but that may change
   in the future."
     (if (eq major-mode 'forth-block-mode)
         (forth-check-motion)))
   
   (defvar forth-idle-function-timer nil 
     "Timer that runs `forth-idle-function' or nil if no timer installed.")
   
   (defun forth-install-motion-hook ()
     "Install the motion-hooking mechanism.  Currently uses idle timers
   but might be transparently changed in the future."
     (unless forth-idle-function-timer
       ;; install idle function only once (first time forth-mode is used)
       (setq forth-idle-function-timer 
             (run-with-idle-timer .05 t 'forth-idle-function))))
   
   (defvar forth-was-point nil)
   
   (defun forth-check-motion ()
     "Run `forth-motion-hooks', if `point' changed since last call.  This
   used to be called via `post-command-hook' but uses idle timers now as
   users complaint about lagging performance."
     (when (or (eq forth-was-point nil) (/= forth-was-point (point)))
       (setq forth-was-point (point))
       (run-hooks 'forth-motion-hooks)))
   
   
   ;;; Hilighting and indentation engine (dk)
   ;;;
   (defvar forth-disable-parser nil
     "*Non-nil means to disable on-the-fly parsing of Forth-code.
   
   This will disable hilighting of forth-mode buffers and will decrease
   the smartness of the indentation engine. Only set it to non-nil, if
   your computer is very slow. To disable hilighting, set
   `forth-hilight-level' to zero.")
   
   (defvar forth-jit-parser nil
     "*Non-nil means to parse Forth-code just-in-time.
   
   This eliminates the need for initially parsing forth-mode buffers and
   thus speeds up loading of Forth files. That feature is only available
   in Emacs21 (and newer versions).")
   
   (defvar forth-words nil 
     "List of words for hilighting and recognition of parsed text areas. 
   
   Hilighting of object-oriented Forth code is achieved, by appending either
   `forth-objects-words' or `forth-oof-words' to the list, depending on the values of `forth-use-objects' or `forth-use-oof'.
   
   After `forth-words' changed, `forth-compile-words' must be called to
   make the changes take effect.
   
   Each item of `forth-words' has the form 
      (MATCHER TYPE HILIGHT . &optional PARSED-TEXT ...)
   
   MATCHER is either a list of strings to match, or a REGEXP.
      If it's a REGEXP, it should not be surrounded by '\\<' or '\\>', since 
      that'll be done automatically by the search routines.
   
   TYPE should be one of 'definiton-starter', 'definition-ender', 'compile-only',
      'immediate' or 'non-immediate'. Those information are required to determine
      whether a word actually parses (and whether that parsed text needs to be
      hilighted).
   
   HILIGHT is a cons cell of the form (FACE . MINIMUM-LEVEL)
      Where MINIMUM-LEVEL specifies the minimum value of `forth-hilight-level',
      that's required for matching text to be hilighted.
   
   PARSED-TEXT specifies whether and how a word parses following text. You can
      specify as many subsequent PARSED-TEXT as you wish, but that shouldn't be
      necessary very often. It has the following form:
      (DELIM-REGEXP SKIP-LEADING-FLAG PARSED-TYPE HILIGHT)
   
   DELIM-REGEXP is a regular expression that should match strings of length 1,
      which are delimiters for the parsed text.
   
   A non-nil value for PARSE-LEADING-FLAG means, that leading delimiter strings
      before parsed text should be skipped. This is the parsing behaviour of the
      Forth word WORD. Set it to t for name-parsing words, nil for comments and
      strings.
   
   PARSED-TYPE specifies what kind of text is parsed. It should be on of 'name',
      'string' or 'comment'.")
   (setq forth-words
         '(
           (("[") definition-ender (font-lock-keyword-face . 1))
           (("]" "]l") definition-starter (font-lock-keyword-face . 1))
           ((":") definition-starter (font-lock-keyword-face . 1)
            "[ \t\n]" t name (font-lock-function-name-face . 3))
           (("immediate" "compile-only" "restrict")
            immediate (font-lock-keyword-face . 1))
           (("does>") compile-only (font-lock-keyword-face . 1))
           ((":noname") definition-starter (font-lock-keyword-face . 1))
           ((";" ";code") definition-ender (font-lock-keyword-face . 1))
           (("include" "require" "needs" "use") 
            non-immediate (font-lock-keyword-face . 1) 
            "[\n\t ]" t string (font-lock-string-face . 1))
           (("included" "required" "thru" "load")
            non-immediate (font-lock-keyword-face . 1))
           (("[char]") compile-only (font-lock-keyword-face . 1)
            "[ \t\n]" t string (font-lock-string-face . 1))
           (("char") non-immediate (font-lock-keyword-face . 1)
            "[ \t\n]" t string (font-lock-string-face . 1))
           (("s\"" "c\"") immediate (font-lock-string-face . 1)
            "[\"\n]" nil string (font-lock-string-face . 1))
           ((".\"") compile-only (font-lock-string-face . 1)
            "[\"\n]" nil string (font-lock-string-face . 1))
           (("abort\"") compile-only (font-lock-keyword-face . 1)
            "[\"\n]" nil string (font-lock-string-face . 1))
           (("{") compile-only (font-lock-variable-name-face . 1)
            "[\n}]" nil name (font-lock-variable-name-face . 1))
           ((".(" "(") immediate (font-lock-comment-face . 1)
             ")" nil comment (font-lock-comment-face . 1))
           (("\\" "\\G") immediate (font-lock-comment-face . 1)
            "[\n]" nil comment (font-lock-comment-face . 1))
             
           (("[if]" "[?do]" "[do]" "[for]" "[begin]" 
             "[endif]" "[then]" "[loop]" "[+loop]" "[next]" "[until]" "[repeat]"
             "[again]" "[while]" "[else]")
            immediate (font-lock-keyword-face . 2))
           (("[ifdef]" "[ifundef]") immediate (font-lock-keyword-face . 2)
            "[ \t\n]" t name (font-lock-function-name-face . 3))
           (("if" "begin" "ahead" "do" "?do" "+do" "u+do" "-do" "u-do" "for" 
             "case" "of" "?dup-if" "?dup-0=-if" "then" "endif" "until"
             "repeat" "again" "leave" "?leave"
             "loop" "+loop" "-loop" "next" "endcase" "endof" "else" "while" "try"
             "recover" "endtry" "assert(" "assert0(" "assert1(" "assert2(" 
             "assert3(" ")" "<interpretation" "<compilation" "interpretation>" 
             "compilation>")
            compile-only (font-lock-keyword-face . 2))
   
           (("true" "false" "c/l" "bl" "cell" "pi" "w/o" "r/o" "r/w") 
            non-immediate (font-lock-constant-face . 2))
           (("~~" "break:" "dbg") compile-only (font-lock-warning-face . 2))
           (("break\"") compile-only (font-lock-warning-face . 1)
            "[\"\n]" nil string (font-lock-string-face . 1))
           (("postpone" "[is]" "defers" "[']" "[compile]") 
            compile-only (font-lock-keyword-face . 2)
            "[ \t\n]" t name (font-lock-function-name-face . 3))
           (("is" "what's") immediate (font-lock-keyword-face . 2)
            "[ \t\n]" t name (font-lock-function-name-face . 3))
           (("<is>" "'" "see") non-immediate (font-lock-keyword-face . 2)
            "[ \t\n]" t name (font-lock-function-name-face . 3))
           (("[to]") compile-only (font-lock-keyword-face . 2)
            "[ \t\n]" t name (font-lock-variable-name-face . 3))
           (("to") immediate (font-lock-keyword-face . 2)
            "[ \t\n]" t name (font-lock-variable-name-face . 3))
           (("<to>") non-immediate (font-lock-keyword-face . 2)
            "[ \t\n]" t name (font-lock-variable-name-face . 3))
   
           (("create" "variable" "constant" "2variable" "2constant" "fvariable"
             "fconstant" "value" "field" "user" "vocabulary" 
             "create-interpret/compile")
            non-immediate (font-lock-type-face . 2)
            "[ \t\n]" t name (font-lock-variable-name-face . 3))
           ("\\S-+%" non-immediate (font-lock-type-face . 2))
           (("defer" "alias" "create-interpret/compile:") 
            non-immediate (font-lock-type-face . 1)
            "[ \t\n]" t name (font-lock-function-name-face . 3))
           (("end-struct") non-immediate (font-lock-keyword-face . 2)
            "[ \t\n]" t name (font-lock-type-face . 3))
           (("struct") non-immediate (font-lock-keyword-face . 2))
           ("-?[0-9]+\\(\\.[0-9]*e\\(-?[0-9]+\\)?\\|\\.?[0-9a-f]*\\)" 
            immediate (font-lock-constant-face . 3))
           ))
   
   (defvar forth-use-objects nil 
     "*Non-nil makes forth-mode also hilight words from the \"Objects\" package.")
   (defvar forth-objects-words
     '(((":m") definition-starter (font-lock-keyword-face . 1)
        "[ \t\n]" t name (font-lock-function-name-face . 3))
       (("m:") definition-starter (font-lock-keyword-face . 1))
       ((";m") definition-ender (font-lock-keyword-face . 1))
       (("[current]" "[parent]") compile-only (font-lock-keyword-face . 1)
        "[ \t\n]" t name (font-lock-function-name-face . 3))
       (("current" "overrides") non-immediate (font-lock-keyword-face . 2)
        "[ \t\n]" t name (font-lock-function-name-face . 3))
       (("[to-inst]") compile-only (font-lock-keyword-face . 2)
        "[ \t\n]" t name (font-lock-variable-name-face . 3))
       (("[bind]") compile-only (font-lock-keyword-face . 2)
        "[ \t\n]" t name (font-lock-type-face . 3)
        "[ \t\n]" t name (font-lock-function-name-face . 3))
       (("bind") non-immediate (font-lock-keyword-face . 2)
        "[ \t\n]" t name (font-lock-type-face . 3)
        "[ \t\n]" t name (font-lock-function-name-face . 3))
       (("inst-var" "inst-value") non-immediate (font-lock-type-face . 2)
        "[ \t\n]" t name (font-lock-variable-name-face . 3))
       (("method" "selector")
        non-immediate (font-lock-type-face . 1)
        "[ \t\n]" t name (font-lock-function-name-face . 3))
       (("end-class" "end-interface")
        non-immediate (font-lock-keyword-face . 2)
        "[ \t\n]" t name (font-lock-type-face . 3))
       (("public" "protected" "class" "exitm" "implementation" "interface"
         "methods" "end-methods" "this") 
        non-immediate (font-lock-keyword-face . 2))
       (("object") non-immediate (font-lock-type-face . 2)))
     "Hilighting description for words of the \"Objects\" package")
   
   
   (defvar forth-use-oof nil 
     "*Non-nil makes forth-mode also hilight words from the \"OOF\" package.")
   (defvar forth-oof-words 
     '((("class") non-immediate (font-lock-keyword-face . 2)
        "[ \t\n]" t name (font-lock-type-face . 3))
       (("var") non-immediate (font-lock-type-face . 2)
        "[ \t\n]" t name (font-lock-variable-name-face . 3))
       (("method" "early") non-immediate (font-lock-type-face . 2)
        "[ \t\n]" t name (font-lock-function-name-face . 3))
       (("::" "super" "bind" "bound" "link") 
        immediate (font-lock-keyword-face . 2)
        "[ \t\n]" t name (font-lock-function-name-face . 3))
       (("ptr" "asptr" "[]") 
        immediate (font-lock-keyword-face . 2)
        "[ \t\n]" t name (font-lock-variable-name-face . 3))
       (("class;" "how:" "self" "new" "new[]" "definitions" "class?" "with"
         "endwith")
        non-immediate (font-lock-keyword-face . 2))
       (("object") non-immediate (font-lock-type-face . 2)))
     "Hilighting description for words of the \"OOF\" package")
   
   (defvar forth-local-words nil 
     "List of Forth words to prepend to `forth-words'. Should be set by a 
    forth source, using a local variables list at the end of the file 
    (\"Local Variables: ... forth-local-words: ... End:\" construct).") 
   
   (defvar forth-custom-words nil
     "List of Forth words to prepend to `forth-words'. Should be set in your
    .emacs.")
   
   (defvar forth-hilight-level 3 "*Level of hilighting of Forth code.")
   
   (defvar forth-compiled-words nil "Compiled representation of `forth-words'.")
   
   (defvar forth-indent-words nil 
     "List of words that have indentation behaviour.
   Each element of `forth-indent-words' should have the form
      (MATCHER INDENT1 INDENT2 &optional TYPE) 
     
   MATCHER is either a list of strings to match, or a REGEXP.
      If it's a REGEXP, it should not be surrounded by `\\<` or `\\>`, since 
      that'll be done automatically by the search routines.
   
   TYPE might be omitted. If it's specified, the only allowed value is 
      currently the symbol `non-immediate', meaning that the word will not 
      have any effect on indentation inside definitions. (:NONAME is a good 
      example for this kind of word).
   
   INDENT1 specifies how to indent a word that's located at the beginning
      of a line, following any number of whitespaces.
   
   INDENT2 specifies how to indent words that are not located at the
      beginning of a line.
   
   INDENT1 and INDENT2 are indentation specifications of the form
      (SELF-INDENT . NEXT-INDENT), where SELF-INDENT is a numerical value, 
      specifying how the matching line and all following lines are to be 
      indented, relative to previous lines. NEXT-INDENT specifies how to indent 
      following lines, relative to the matching line.
     
      Even values of SELF-INDENT and NEXT-INDENT correspond to multiples of
      `forth-indent-level'. Odd values get an additional 
      `forth-minor-indent-level' added/substracted. Eg a value of -2 indents
      1 * forth-indent-level  to the left, wheras 3 indents 
      1 * forth-indent-level + forth-minor-indent-level  columns to the right.")
   
   (setq forth-indent-words
         '((("if" "begin" "do" "?do" "+do" "-do" "u+do"
             "u-do" "?dup-if" "?dup-0=-if" "case" "of" "try" 
             "[if]" "[ifdef]" "[ifundef]" "[begin]" "[for]" "[do]" "[?do]")
            (0 . 2) (0 . 2))
           ((":" ":noname" "code" "struct" "m:" ":m" "class" "interface")
            (0 . 2) (0 . 2) non-immediate)
           ("\\S-+%$" (0 . 2) (0 . 0) non-immediate)
           ((";" ";m") (-2 . 0) (0 . -2))
           (("again" "then" "endif" "endtry" "endcase" "endof" 
             "[then]" "[endif]" "[loop]" "[+loop]" "[next]" 
             "[until]" "[again]" "loop")
            (-2 . 0) (0 . -2))
           (("end-code" "end-class" "end-interface" "end-class-noname" 
             "end-interface-noname" "end-struct" "class;")
            (-2 . 0) (0 . -2) non-immediate)
           (("protected" "public" "how:") (-1 . 1) (0 . 0) non-immediate)
           (("+loop" "-loop" "until") (-2 . 0) (-2 . 0))
           (("else" "recover" "[else]") (-2 . 2) (0 . 0))
           (("does>") (-1 . 1) (0 . 0))
           (("while" "[while]") (-2 . 4) (0 . 2))
           (("repeat" "[repeat]") (-4 . 0) (0 . -4))
           (("\\g") (-2 . 2) (0 . 0))))
   
   (defvar forth-local-indent-words nil 
     "List of Forth words to prepend to `forth-indent-words', when a forth-mode
   buffer is created. Should be set by a Forth source, using a local variables 
   list at the end of the file (\"Local Variables: ... forth-local-words: ... 
   End:\" construct).")
   
   (defvar forth-custom-indent-words nil
     "List of Forth words to prepend to `forth-indent-words'. Should be set in
    your .emacs.")
   
   (defvar forth-indent-level 4
     "*Indentation of Forth statements.")
   (defvar forth-minor-indent-level 2
     "*Minor indentation of Forth statements.")
   (defvar forth-compiled-indent-words nil)
   
   ;(setq debug-on-error t)
   
   ;; Filter list by predicate. This is a somewhat standard function for 
   ;; functional programming languages. So why isn't it already implemented 
   ;; in Lisp??
   (defun forth-filter (predicate list)
     (let ((filtered nil))
       (mapcar (lambda (item)
                 (when (funcall predicate item)
                   (if filtered
                       (nconc filtered (list item))
                     (setq filtered (cons item nil))))
                 nil) list)
       filtered))
   
   ;; Helper function for `forth-compile-word': return whether word has to be
   ;; added to the compiled word list, for syntactic parsing and hilighting.
   (defun forth-words-filter (word)
     (let* ((hilight (nth 2 word))
            (level (cdr hilight))
            (parsing-flag (nth 3 word)))
       (or parsing-flag 
           (<= level forth-hilight-level))))
   
   ;; Helper function for `forth-compile-word': translate one entry from 
   ;; `forth-words' into the form  (regexp regexp-depth word-description)
   (defun forth-compile-words-mapper (word)
     ;; warning: we cannot rely on regexp-opt's PAREN argument, since
     ;; XEmacs will use shy parens by default :-(
     (let* ((matcher (car word))
            (regexp 
             (concat "\\(" (cond ((stringp matcher) matcher)
                                 ((listp matcher) (regexp-opt matcher))
                                 (t (error "Invalid matcher `%s'")))
                     "\\)"))
            (depth (regexp-opt-depth regexp))
            (description (cdr word)))
       (list regexp depth description)))
   
   ;; Read `words' and create a compiled representation suitable for efficient
   ;; parsing of the form  
   ;; (regexp (subexp-count word-description) (subexp-count2 word-description2)
   ;;  ...)
   (defun forth-compile-wordlist (words)
     (let* ((mapped (mapcar 'forth-compile-words-mapper words))
            (regexp (concat "\\<\\(" 
                            (mapconcat 'car mapped "\\|")
                            "\\)\\>"))
            (sub-count 2)
            (sub-list (mapcar 
                       (lambda (i) 
                         (let ((sub (cons sub-count (nth 2 i))))
                           (setq sub-count (+ sub-count (nth 1 i)))
                           sub 
                           )) 
                       mapped)))
       (let ((result (cons regexp sub-list)))
         (byte-compile 'result)
         result)))
   
   (defun forth-compile-words ()
     "Compile the the words from `forth-words' and `forth-indent-words' into
    the format that's later used for doing the actual hilighting/indentation.
    Store the resulting compiled wordlists in `forth-compiled-words' and 
   `forth-compiled-indent-words', respective"
     (setq forth-compiled-words 
           (forth-compile-wordlist 
            (forth-filter 'forth-words-filter forth-words)))
     (setq forth-compiled-indent-words 
           (forth-compile-wordlist forth-indent-words)))
   
   (defun forth-hack-local-variables ()
     "Parse and bind local variables, set in the contents of the current 
    forth-mode buffer. Prepend `forth-local-words' to `forth-words' and 
    `forth-local-indent-words' to `forth-indent-words'."
     (hack-local-variables)
     (setq forth-words (append forth-local-words forth-words))
     (setq forth-indent-words (append forth-local-indent-words 
                                      forth-indent-words)))
   
   (defun forth-customize-words ()
     "Add the words from `forth-custom-words' and `forth-custom-indent-words'
    to `forth-words' and `forth-indent-words', respective. Add 
    `forth-objects-words' and/or `forth-oof-words' to `forth-words', if
    `forth-use-objects' and/or `forth-use-oof', respective is set."
     (setq forth-words (append forth-custom-words forth-words
                               (if forth-use-oof forth-oof-words nil)
                               (if forth-use-objects forth-objects-words nil)))
     (setq forth-indent-words (append 
                               forth-custom-indent-words forth-indent-words)))
   
   
   
   ;; get location of first character of previous forth word that's got 
   ;; properties
   (defun forth-previous-start (pos)
     (let* ((word (get-text-property pos 'forth-word))
            (prev (previous-single-property-change 
                   (min (point-max) (1+ pos)) 'forth-word 
                   (current-buffer) (point-min))))
       (if (or (= (point-min) prev) word) prev
         (if (get-text-property (1- prev) 'forth-word)
             (previous-single-property-change 
              prev 'forth-word (current-buffer) (point-min))
           (point-min)))))
   
   ;; Get location of the last character of the current/next forth word that's
   ;; got properties, text that's parsed by the word is considered as parts of 
   ;; the word.
   (defun forth-next-end (pos)
     (let* ((word (get-text-property pos 'forth-word))
            (next (next-single-property-change pos 'forth-word 
                                               (current-buffer) (point-max))))
       (if word next
         (if (get-text-property next 'forth-word)
             (next-single-property-change 
              next 'forth-word (current-buffer) (point-max))
           (point-max)))))
   
   (defun forth-next-whitespace (pos)
     (save-excursion
       (goto-char pos)
       (skip-syntax-forward "-" (point-max))
       (point)))
   (defun forth-previous-word (pos)
     (save-excursion
       (goto-char pos)
       (re-search-backward "\\<" pos (point-min) 1)
       (point)))
   
   ;; Delete all properties, used by Forth mode, from `from' to `to'.
   (defun forth-delete-properties (from to)
     (remove-text-properties 
      from to '(face nil fontified nil 
                     forth-parsed nil forth-word nil forth-state nil)))
   
   ;; Get the index of the branch of the most recently evaluated regular 
   ;; expression that matched. (used for identifying branches "a\\|b\\|c...")
   (defun forth-get-regexp-branch ()
     (let ((count 2))
       (while (not (condition-case err (match-beginning count)
                     (args-out-of-range t)))  ; XEmacs requires error handling
         (setq count (1+ count)))
       count))
   
   ;; seek to next forth-word and return its "word-description"
   (defun forth-next-known-forth-word (to)
     (if (<= (point) to)
         (progn
           (let* ((regexp (car forth-compiled-words))
                  (pos (re-search-forward regexp to t)))
             (if pos (let ((branch (forth-get-regexp-branch))
                           (descr (cdr forth-compiled-words)))
                       (goto-char (match-beginning 0))
                       (cdr (assoc branch descr)))
               'nil)))
       nil))
   
   ;; Set properties of forth word at `point', eventually parsing subsequent 
   ;; words, and parsing all whitespaces. Set point to delimiter after word.
   ;; The word, including it's parsed text gets the `forth-word' property, whose 
   ;; value is unique, and may be used for getting the word's start/end 
   ;; positions.
   (defun forth-set-word-properties (state data)
     (let* ((start (point))
            (end (progn (re-search-forward "[ \t]\\|$" (point-max) 1)
                        (point)))
            (type (car data))
            (hilight (nth 1 data))
            (bad-word (and (not state) (eq type 'compile-only)))
            (hlface (if bad-word font-lock-warning-face
                      (if (<= (cdr hilight) forth-hilight-level)
                          (car hilight) nil))))
       (when hlface (put-text-property start end 'face hlface))
       ;; if word parses in current state, process parsed range of text
       (when (or (not state) (eq type 'compile-only) (eq type 'immediate))
         (let ((parse-data (nthcdr 2 data)))
           (while parse-data
             (let ((delim (nth 0 parse-data))
                   (skip-leading (nth 1 parse-data))
                   (parse-type (nth 2 parse-data))
                   (parsed-hilight (nth 3 parse-data))
                   (parse-start (point))
                   (parse-end))
               (when skip-leading
                 (while (and (looking-at delim) (> (match-end 0) (point))
                             (not (looking-at "\n")))
                   (forward-char)))
               (re-search-forward delim (point-max) 1)
               (setq parse-end (point))
               (forth-delete-properties end parse-end)
               (when (<= (cdr parsed-hilight) forth-hilight-level)
                 (put-text-property 
                  parse-start parse-end 'face (car parsed-hilight)))
               (put-text-property 
                parse-start parse-end 'forth-parsed parse-type)
               (setq end parse-end)
               (setq parse-data (nthcdr 4 parse-data))))))
       (put-text-property start end 'forth-word start)))
   
   ;; Search for known Forth words in the range `from' to `to', using 
   ;; `forth-next-known-forth-word' and set their properties via 
   ;; `forth-set-word-properties'.
   (defun forth-update-properties (from to &optional loudly)
     (save-excursion
       (let ((msg-count 0) (state) (word-descr) (last-location))
         (goto-char (forth-previous-word (forth-previous-start 
                                          (max (point-min) (1- from)))))
         (setq to (forth-next-end (min (point-max) (1+ to))))
         ;; `to' must be on a space delimiter, if a parsing word was changed
         (setq to (forth-next-whitespace to))
         (setq state (get-text-property (point) 'forth-state))
         (setq last-location (point))
         (forth-delete-properties (point) to)
         (put-text-property (point) to 'fontified t)
         ;; hilight loop...
         (while (setq word-descr (forth-next-known-forth-word to))
           (when loudly
             (when (equal 0 (% msg-count 100))
               (message "Parsing Forth code...%s"
                        (make-string (/ msg-count 100) ?.)))
             (setq msg-count (1+ msg-count)))
           (forth-set-word-properties state word-descr)
           (when state (put-text-property last-location (point) 'forth-state t))
           (let ((type (car word-descr)))
             (if (eq type 'definition-starter) (setq state t))
             (if (eq type 'definition-ender) (setq state nil))
             (setq last-location (point))))
         ;; update state property up to `to'
         (if (and state (< (point) to))
             (put-text-property last-location to 'forth-state t))
         ;; extend search if following state properties differ from current state
         (if (< to (point-max))
             (if (not (equal state (get-text-property (1+ to) 'forth-state)))
                 (let ((extend-to (next-single-property-change 
                                   to 'forth-state (current-buffer) (point-max))))
                   (forth-update-properties to extend-to))
               ))
         )))
   
   ;; save-buffer-state borrowed from `font-lock.el'
   (eval-when-compile 
     (defmacro forth-save-buffer-state (varlist &rest body)
       "Bind variables according to VARLIST and eval BODY restoring buffer state."
       (` (let* ((,@ (append varlist
                      '((modified (buffer-modified-p)) (buffer-undo-list t)
                        (inhibit-read-only t) (inhibit-point-motion-hooks t)
                        before-change-functions after-change-functions
                        deactivate-mark buffer-file-name buffer-file-truename))))
            (,@ body)
            (when (and (not modified) (buffer-modified-p))
              (set-buffer-modified-p nil))))))
   
   ;; Function that is added to the `change-functions' hook. Calls 
   ;; `forth-update-properties' and keeps care of disabling undo information
   ;; and stuff like that.
   (defun forth-change-function (from to len &optional loudly)
     (save-match-data
       (forth-save-buffer-state 
        () 
        (unless forth-disable-parser (forth-update-properties from to loudly))
        (forth-update-warn-long-lines))))
   
   (defun forth-fontification-function (from)
     "Function to be called from `fontification-functions' of Emacs 21."
     (save-match-data
       (forth-save-buffer-state
        ((to (min (point-max) (+ from 100))))
        (unless (or forth-disable-parser (not forth-jit-parser)
                    (get-text-property from 'fontified))
          (forth-update-properties from to)))))
   
   (eval-when-compile
     (byte-compile 'forth-set-word-properties)
     (byte-compile 'forth-next-known-forth-word)
     (byte-compile 'forth-update-properties)
     (byte-compile 'forth-delete-properties)
     (byte-compile 'forth-get-regexp-branch)) 
   
   ;;; imenu support
   ;;;
   (defvar forth-defining-words 
     '("VARIABLE" "CONSTANT" "2VARIABLE" "2CONSTANT" "FVARIABLE" "FCONSTANT"
      "USER" "VALUE" "field" "end-struct" "VOCABULARY" "CREATE" ":" "CODE"
      "DEFER" "ALIAS")
     "List of words, that define the following word.
   Used for imenu index generation.")
   
   (defvar forth-defining-words-regexp nil 
     "Regexp that's generated for matching `forth-defining-words'")
    
   (defun forth-next-definition-starter ()
     (progn
       (let* ((pos (re-search-forward forth-defining-words-regexp (point-max) t)))
         (if pos
             (if (or (text-property-not-all (match-beginning 0) (match-end 0) 
                                            'forth-parsed nil)
                     (text-property-not-all (match-beginning 0) (match-end 0)
                                            'forth-state nil)) 
                 (forth-next-definition-starter)
               t)
           nil))))
   
   (defun forth-create-index ()
     (let* ((forth-defining-words-regexp 
             (concat "\\<\\(" (regexp-opt forth-defining-words) "\\)\\>"))
            (index nil))
       (goto-char (point-min))
       (while (forth-next-definition-starter)
         (if (looking-at "[ \t]*\\([^ \t\n]+\\)")
             (setq index (cons (cons (match-string 1) (point)) index))))
       index))
   
   ;; top-level require is executed at byte-compile and load time
   (eval-and-compile (forth-require 'speedbar))
   
   ;; this code is executed at load-time only
   (when (memq 'speedbar features)
     (speedbar-add-supported-extension ".fs")
     (speedbar-add-supported-extension ".fb"))
   
   ;; (require 'profile)
   ;; (setq profile-functions-list '(forth-set-word-properties forth-next-known-forth-word forth-update-properties forth-delete-properties forth-get-regexp-branch))
   
   ;;; Indentation
   ;;;
   
   ;; Return, whether `pos' is the first forth word on its line
   (defun forth-first-word-on-line-p (pos)
     (save-excursion
       (beginning-of-line)
       (skip-chars-forward " \t")
       (= pos (point))))
   
   ;; Return indentation data (SELF-INDENT . NEXT-INDENT) of next known 
   ;; indentation word, or nil if there is no word up to `to'. 
   ;; Position `point' at location just after found word, or at `to'. Parsed 
   ;; ranges of text will not be taken into consideration!
   (defun forth-next-known-indent-word (to)
     (if (<= (point) to)
         (progn
           (let* ((regexp (car forth-compiled-indent-words))
                  (pos (re-search-forward regexp to t)))
             (if pos
                 (let* ((start (match-beginning 0))
                        (end (match-end 0))
                        (branch (forth-get-regexp-branch))
                        (descr (cdr forth-compiled-indent-words))
                        (indent (cdr (assoc branch descr)))
                        (type (nth 2 indent)))
                   ;; skip words that are parsed (strings/comments) and 
                   ;; non-immediate words inside definitions
                   (if (or (text-property-not-all start end 'forth-parsed nil)
                           (and (eq type 'non-immediate) 
                                (text-property-not-all start end 
                                                       'forth-state nil)))
                       (forth-next-known-indent-word to)
                     (if (forth-first-word-on-line-p (match-beginning 0))
                         (nth 0 indent) (nth 1 indent))))
               nil)))
       nil))
     
   ;; Translate indentation value `indent' to indentation column. Multiples of
   ;; 2 correspond to multiples of `forth-indent-level'. Odd numbers get an
   ;; additional `forth-minor-indent-level' added (or substracted).
   (defun forth-convert-to-column (indent)
     (let* ((sign (if (< indent 0) -1 1))
            (value (abs indent))
            (major (* (/ value 2) forth-indent-level))
            (minor (* (% value 2) forth-minor-indent-level)))
       (* sign (+ major minor))))
   
   ;; Return the column increment, that the current line of forth code does to
   ;; the current or following lines. `which' specifies which indentation values
   ;; to use. 0 means the indentation of following lines relative to current 
   ;; line, 1 means the indentation of the current line relative to the previous 
   ;; line. Return `nil', if there are no indentation words on the current line.
   (defun forth-get-column-incr (which)
     (save-excursion
       (let ((regexp (car forth-compiled-indent-words))
             (word-indent)
             (self-indent nil)
             (next-indent nil)
             (to (save-excursion (end-of-line) (point))))
         (beginning-of-line)
         (while (setq word-indent (forth-next-known-indent-word to))
           (let* ((self-incr (car word-indent))
                  (next-incr (cdr word-indent))
                  (self-column-incr (forth-convert-to-column self-incr))
                  (next-column-incr (forth-convert-to-column next-incr)))
             (setq next-indent (if next-indent next-indent 0))
             (setq self-indent (if self-indent self-indent 0))
             (if (or (and (> next-indent 0) (< self-column-incr 0))
                     (and (< next-indent 0) (> self-column-incr 0)))
                 (setq next-indent (+ next-indent self-column-incr))
               (setq self-indent (+ self-indent self-column-incr)))
             (setq next-indent (+ next-indent next-column-incr))))
         (nth which (list self-indent next-indent)))))
   
   ;; Find previous line that contains indentation words, return the column,
   ;; to which following text should be indented to.
   (defun forth-get-anchor-column ()
     (save-excursion
       (if (/= 0 (forward-line -1)) 0
         (let ((indent))
           (while (not (or (setq indent (forth-get-column-incr 1))
                           (<= (point) (point-min))))
             (forward-line -1))
           (+ (current-indentation) (if indent indent 0))))))
   
   (defun forth-indent-line (&optional flag)
     "Correct indentation of the current Forth line."
     (let* ((anchor (forth-get-anchor-column))
            (column-incr (forth-get-column-incr 0)))
       (forth-indent-to (if column-incr (+ anchor column-incr) anchor))))
   
   (defun forth-current-column ()
     (- (point) (save-excursion (beginning-of-line) (point))))
   (defun forth-current-indentation ()
     (- (save-excursion (beginning-of-line) (forward-to-indentation 0) (point))
        (save-excursion (beginning-of-line) (point))))
   
   (defun forth-indent-to (x)
     (let ((p nil))
       (setq p (- (forth-current-column) (forth-current-indentation)))
       (forth-delete-indentation)
       (beginning-of-line)
       (indent-to x)
       (if (> p 0) (forward-char p))))
   
   (defun forth-delete-indentation ()
     (save-excursion
       (delete-region 
        (progn (beginning-of-line) (point)) 
        (progn (back-to-indentation) (point)))))
   
   (defun forth-indent-command ()
     (interactive)
     (forth-indent-line t))
   
   ;; remove trailing whitespaces in current line
   (defun forth-remove-trailing ()
     (save-excursion
       (end-of-line)
       (delete-region (point) (progn (skip-chars-backward " \t") (point)))))
   
   ;; insert newline, removing any trailing whitespaces in the current line
   (defun forth-newline-remove-trailing ()
     (save-excursion
       (delete-region (point) (progn (skip-chars-backward " \t") (point))))
     (newline))
   ;  (let ((was-point (point-marker)))
   ;    (unwind-protect 
   ;       (progn (forward-line -1) (forth-remove-trailing))
   ;      (goto-char (was-point)))))
   
   ;; workaround for bug in `reindent-then-newline-and-indent'
   (defun forth-reindent-then-newline-and-indent ()
     (interactive "*")
     (indent-according-to-mode)
     (forth-newline-remove-trailing)
     (indent-according-to-mode))
   
   
   ;;; Block file encoding/decoding  (dk)
   ;;;
   
   (defconst forth-c/l 64 "Number of characters per block line")
   (defconst forth-l/b 16 "Number of lines per block")
   
   ;; Check whether the unconverted block file line, point is in, does not
   ;; contain `\n' and `\t' characters.
   (defun forth-check-block-line (line)
     (let ((end (save-excursion (beginning-of-line) (forward-char forth-c/l)
                                (point))))
       (save-excursion 
         (beginning-of-line)
         (when (search-forward "\n" end t)
           (message "Warning: line %i contains newline character #10" line)
           (ding t))
         (beginning-of-line)
         (when (search-forward "\t" end t)
           (message "Warning: line %i contains tab character #8" line)
           (ding t)))))
   
   (defun forth-convert-from-block (from to)
     "Convert block file format to stream source in current buffer."
     (let ((line (count-lines (point-min) from)))
       (save-excursion
         (goto-char from)
         (set-mark to)
         (while (< (+ (point) forth-c/l) (mark t))
           (setq line (1+ line))
           (forth-check-block-line line)
           (forward-char forth-c/l)
           (forth-newline-remove-trailing))
         (when (= (+ (point) forth-c/l) (mark t))
           (forth-remove-trailing))
         (mark t))))
   
   ;; Pad a line of a block file up to `forth-c/l' characters, positioning `point'
   ;; at the end of line.
   (defun forth-pad-block-line ()
     (save-excursion
       (end-of-line)
       (if (<= (current-column) forth-c/l)
           (move-to-column forth-c/l t)
         (message "Line %i longer than %i characters, truncated"
                  (count-lines (point-min) (point)) forth-c/l)
         (ding t)
         (move-to-column forth-c/l t)
         (delete-region (point) (progn (end-of-line) (point))))))
   
   ;; Replace tab characters in current line by spaces.
   (defun forth-convert-tabs-in-line ()
     (save-excursion
       (beginning-of-line)
       (while (search-forward "\t" (save-excursion (end-of-line) (point)) t)
         (backward-char)
         (delete-region (point) (1+ (point)))
         (insert-char ?\  (- tab-width (% (current-column) tab-width))))))
   
   ;; Delete newline at end of current line, concatenating it with the following
   ;; line. Place `point' at end of newly formed line.
   (defun forth-delete-newline ()
     (end-of-line)
     (delete-region (point) (progn (beginning-of-line 2) (point))))
   
   (defun forth-convert-to-block (from to &optional original-buffer) 
     "Convert range of text to block file format in current buffer."
     (let* ((lines 0)) ; I have to count lines myself, since `count-lines' has
                       ; problems with trailing newlines...
       (save-excursion
         (goto-char from)
         (set-mark to)
         ;; pad lines to full length (`forth-c/l' characters per line)
         (while (< (save-excursion (end-of-line) (point)) (mark t))
           (setq lines (1+ lines))
           (forth-pad-block-line)
           (forth-convert-tabs-in-line)
           (forward-line))
         ;; also make sure the last line is padded, if `to' is at its end
         (end-of-line)
         (when (= (point) (mark t))
           (setq lines (1+ lines))
           (forth-pad-block-line)
           (forth-convert-tabs-in-line))
         ;; remove newlines between lines
         (goto-char from)
         (while (< (save-excursion (end-of-line) (point)) (mark t))
           (forth-delete-newline))
         ;; append empty lines, until last block is complete
         (goto-char (mark t))
         (let* ((required (* (/ (+ lines (1- forth-l/b)) forth-l/b) forth-l/b))
                (pad-lines (- required lines)))
           (while (> pad-lines 0)
             (insert-char ?\  forth-c/l)
             (setq pad-lines (1- pad-lines))))
         (point))))
   
   (defun forth-detect-block-file-p ()
     "Return non-nil if the current buffer is in block file format. Detection is
   done by checking whether the first line has 1024 characters or more."
     (save-restriction 
       (widen)
       (save-excursion
          (goto-char (point-min))
          (end-of-line)
          (>= (current-column) 1024))))
   
   ;; add block file conversion routines to `format-alist'
   (defconst forth-block-format-description
     '(forth-blocks "Forth block source file" nil 
                    forth-convert-from-block forth-convert-to-block 
                    t normal-mode))
   (unless (memq forth-block-format-description format-alist)
     (setq format-alist (cons forth-block-format-description format-alist)))
   
   ;;; End block file encoding/decoding
   
   ;;; Block file editing
   ;;;
   (defvar forth-overlay-arrow-string ">>")
   (defvar forth-block-base 1 "Number of first block in block file")
   (defvar forth-show-screen nil
     "Non-nil means to show screen starts and numbers (for block files)")
   (defvar forth-warn-long-lines nil
     "Non-nil means to warn about lines that are longer than 64 characters")
   
   (defvar forth-screen-marker nil)
   (defvar forth-screen-number-string nil)
   
   (defun forth-update-show-screen ()
     "If `forth-show-screen' is non-nil, put overlay arrow to start of screen, 
   `point' is in. If arrow now points to different screen than before, display 
   screen number."
     (if (not forth-show-screen)
         (setq overlay-arrow-string nil)
       (save-excursion
         (let* ((line (count-lines (point-min) (min (point-max) (1+ (point)))))
                (first-line (1+ (* (/ (1- line) forth-l/b) forth-l/b)))
                (scr (+ forth-block-base (/ first-line forth-l/b))))
           (setq overlay-arrow-string forth-overlay-arrow-string)
           (goto-line first-line)
           (setq overlay-arrow-position forth-screen-marker)
           (set-marker forth-screen-marker 
                       (save-excursion (goto-line first-line) (point)))
           (setq forth-screen-number-string (format "%d" scr))))))
   
   (add-hook 'forth-motion-hooks 'forth-update-show-screen)
   
   (defun forth-update-warn-long-lines ()
     "If `forth-warn-long-lines' is non-nil, display a warning whenever a line
   exceeds 64 characters."
     (when forth-warn-long-lines
       (when (> (save-excursion (end-of-line) (current-column)) forth-c/l)
         (message "Warning: current line exceeds %i characters"
                  forth-c/l))))
   
   (add-hook 'forth-motion-hooks 'forth-update-warn-long-lines)
   
   ;;; End block file editing
   
 (defvar forth-positives  
   " : :noname code interpretation: ;code does> begin do ?do +do -do u+do u-do while if ?dup-if ?dup-0=-if else case of struct [if] [ifdef] [ifundef] [else] with public: private: class "  
   "Contains all words which will cause the indent-level to be incremented  
 on the next line.  
 OBS! All words in forth-positives must be surrounded by spaces.")  
   
 (defvar forth-negatives  
   " ; end-code ;code does> until repeat while +loop loop -loop s+loop else then endif again endcase endof end-struct [then] [else] [endif] endwith class; how: "  
   "Contains all words which will cause the indent-level to be decremented  
 on the current line.  
 OBS! All words in forth-negatives must be surrounded by spaces.")  
   
 (defvar forth-zeroes  
   " : :noname code interpretation: public: private: how: implements class class; "  
   "Contains all words which causes the indent to go to zero")  
   
 (setq forth-zero 0)  
   
 (defvar forth-zup  
   " how: implements "  
   "Contains all words which causes zero indent level to change")  
   
 (defvar forth-zdown  
   " class; how: class public: private: "  
   "Contains all words which causes zero indent level to change")  
   
 (defvar forth-prefixes  
   " postpone [compile] ['] [char] "  
   "words that prefix and escape other words")  
   
 (defvar forth-mode-abbrev-table nil  (defvar forth-mode-abbrev-table nil
   "Abbrev table in use in Forth-mode buffers.")    "Abbrev table in use in Forth-mode buffers.")
Line 79  OBS! All words in forth-negatives must b Line 1088  OBS! All words in forth-negatives must b
 ;(define-key forth-mode-map "\M-\C-x" 'compile)  ;(define-key forth-mode-map "\M-\C-x" 'compile)
 (define-key forth-mode-map "\C-x\\" 'comment-region)  (define-key forth-mode-map "\C-x\\" 'comment-region)
 (define-key forth-mode-map "\C-x~" 'forth-remove-tracers)  (define-key forth-mode-map "\C-x~" 'forth-remove-tracers)
 (define-key forth-mode-map "\e\C-m" 'forth-send-paragraph)  
 (define-key forth-mode-map "\eo" 'forth-send-buffer)  
 (define-key forth-mode-map "\C-x\C-m" 'forth-split)  (define-key forth-mode-map "\C-x\C-m" 'forth-split)
 (define-key forth-mode-map "\e " 'forth-reload)  (define-key forth-mode-map "\e " 'forth-reload)
 (define-key forth-mode-map "\t" 'forth-indent-command)  (define-key forth-mode-map "\t" 'forth-indent-command)
 (define-key forth-mode-map "\C-m" 'reindent-then-newline-and-indent)  (define-key forth-mode-map "\C-m" 'forth-reindent-then-newline-and-indent)
 (define-key forth-mode-map "\M-q" 'forth-fill-paragraph)  (define-key forth-mode-map "\M-q" 'forth-fill-paragraph)
 (define-key forth-mode-map "\e." 'forth-find-tag)  (define-key forth-mode-map "\e." 'forth-find-tag)
   
 (load "etags")  ;; setup for C-h C-i to work
   (eval-and-compile (forth-require 'info-look))
   (when (memq 'info-look features)
     (defvar forth-info-lookup '(symbol (forth-mode "\\S-+" t 
                                                     (("(gforth)Word Index"))
                                                     "\\S-+")))
     (unless (memq forth-info-lookup info-lookup-alist)
       (setq info-lookup-alist (cons forth-info-lookup info-lookup-alist)))
     ;; in X-Emacs C-h C-i is by default bound to Info-query
     (define-key forth-mode-map "\C-h\C-i" 'info-lookup-symbol))
   
   
   ;;   (info-lookup-add-help
   ;;    :topic 'symbol
   ;;    :mode 'forth-mode
   ;;    :regexp "[^       
   ;; ]+"
   ;;    :ignore-case t
   ;;    :doc-spec '(("(gforth)Name Index" nil "`" "'  "))))
   
   (require 'etags)
   
 (defun forth-find-tag (tagname &optional next-p regexp-p)  (defun forth-find-tag (tagname &optional next-p regexp-p)
   (interactive (find-tag-interactive "Find tag: "))    (interactive (find-tag-interactive "Find tag: "))
     (unless (or regexp-p next-p)
       (setq tagname (concat "\\(^\\|\\s-\\)\\(" (regexp-quote tagname) 
                               "\\)\\(\\s-\\|$\\)")))
   (switch-to-buffer    (switch-to-buffer
    (find-tag-noselect (concat " " tagname " ") next-p regexp-p)))     (find-tag-noselect tagname next-p t)))
   
 (defvar forth-mode-syntax-table nil  (defvar forth-mode-syntax-table nil
   "Syntax table in use in Forth-mode buffers.")    "Syntax table in use in Forth-mode buffers.")
   
   ;; Important: hilighting/indentation now depends on a correct syntax table.
   ;; All characters, except whitespace *must* belong to the "word constituent"
   ;; syntax class. If different behaviour is required, use of Categories might
   ;; help.
 (if (not forth-mode-syntax-table)  (if (not forth-mode-syntax-table)
     (progn      (progn
       (setq forth-mode-syntax-table (make-syntax-table))        (setq forth-mode-syntax-table (make-syntax-table))
Line 108  OBS! All words in forth-negatives must b Line 1142  OBS! All words in forth-negatives must b
         (while (< char 256)          (while (< char 256)
           (modify-syntax-entry char "w" forth-mode-syntax-table)            (modify-syntax-entry char "w" forth-mode-syntax-table)
           (setq char (1+ char))))            (setq char (1+ char))))
       (modify-syntax-entry ?\" "\"" forth-mode-syntax-table)  
       (modify-syntax-entry ?\\ "<" forth-mode-syntax-table)  
       (modify-syntax-entry ?\n ">" forth-mode-syntax-table)  
       ))        ))
 ;I do not define '(' and ')' as comment delimiters, because emacs  
 ;only supports one comment syntax (and a hack to accomodate C++); I  
 ;use '\' for natural language comments and '(' for formal comments  
 ;like stack comments, so for me it's better to have emacs treat '\'  
 ;comments as comments. If you want it different, make the appropriate  
 ;changes (best in your .emacs file).  
 ;  
 ;Hmm, the C++ hack could be used to support both comment syntaxes: we  
 ;can have different comment styles, if both comments start with the  
 ;same character. we could use ' ' as first and '(' and '\' as second  
 ;character. However this would fail for G\ comments.  
   
 (defconst forth-indent-level 4  
   "Indentation of Forth statements.")  
   
 (defun forth-mode-variables ()  (defun forth-mode-variables ()
   (set-syntax-table forth-mode-syntax-table)    (set-syntax-table forth-mode-syntax-table)
Line 145  OBS! All words in forth-negatives must b Line 1162  OBS! All words in forth-negatives must b
   (make-local-variable 'comment-column)    (make-local-variable 'comment-column)
   (setq comment-column 40)    (setq comment-column 40)
   (make-local-variable 'comment-start-skip)    (make-local-variable 'comment-start-skip)
   (setq comment-start-skip "\\ ")    (setq comment-start-skip "\\\\ ")
   (make-local-variable 'comment-indent-hook)    (make-local-variable 'comment-indent-function)
   (setq comment-indent-hook 'forth-comment-indent)    (setq comment-indent-function 'forth-comment-indent)
   (make-local-variable 'parse-sexp-ignore-comments)    (make-local-variable 'parse-sexp-ignore-comments)
   (setq parse-sexp-ignore-comments t))    (setq parse-sexp-ignore-comments t)
       (setq case-fold-search t)
     (make-local-variable 'forth-was-point)
     (setq forth-was-point -1)
     (make-local-variable 'forth-words)
     (make-local-variable 'forth-compiled-words)
     (make-local-variable 'forth-compiled-indent-words)
     (make-local-variable 'forth-hilight-level)
     (make-local-variable 'after-change-functions)
     (make-local-variable 'forth-show-screen)
     (make-local-variable 'forth-screen-marker)
     (make-local-variable 'forth-warn-long-lines)
     (make-local-variable 'forth-screen-number-string)
     (make-local-variable 'forth-use-oof)
     (make-local-variable 'forth-use-objects) 
     (setq forth-screen-marker (copy-marker 0))
     (add-hook 'after-change-functions 'forth-change-function)
     (if (and forth-jit-parser (>= emacs-major-version 21))
         (add-hook 'fontification-functions 'forth-fontification-function))
     (setq imenu-create-index-function 'forth-create-index))
   
 ;;;###autoload  ;;;###autoload
 (defun forth-mode ()  (defun forth-mode ()
   "    "
 Major mode for editing Forth code. Tab indents for Forth code. Comments  Major mode for editing Forth code. Tab indents for Forth code. Comments
 are delimited with \\ and newline. Paragraphs are separated by blank lines  are delimited with \\ and newline. Paragraphs are separated by blank lines
 only.  only. Block files are autodetected, when read, and converted to normal 
   stream source format. See also `forth-block-mode'.
 \\{forth-mode-map}  \\{forth-mode-map}
  Forth-split  
     Positions the current buffer on top and a forth-interaction window  Variables controlling syntax hilighting/recognition of parsed text:
     below. The window size is controlled by the forth-percent-height   `forth-words'
     variable (see below).      List of words that have a special parsing behaviour and/or should be
  Forth-reload      hilighted. Add custom words by setting forth-custom-words in your
     Reloads the forth library and restarts the forth process.      .emacs, or by setting forth-local-words, in source-files' local 
  Forth-send-buffer      variables lists.
     Sends the current buffer, in text representation, as input to the   forth-use-objects
     forth process.      Set this variable to non-nil in your .emacs, or in a local variables 
  Forth-send-paragraph      list, to hilight and recognize the words from the \"Objects\" package 
     Sends the previous or the current paragraph to the forth-process.      for object-oriented programming.
     Note that the cursor only need to be with in the paragraph to be sent.   forth-use-oof
 forth-documentation      Same as above, just for the \"OOF\" package.
     Search for documentation of forward adjacent to cursor. Note! To use   forth-custom-words
     this mode you have to add a line, to your .emacs file, defining the      List of custom Forth words to prepend to `forth-words'. Should be set
     directories to search through for documentation files (se variable      in your .emacs.
     forth-help-load-path below) e.g. (setq forth-help-load-path '(nil)).   forth-local-words
       List of words to prepend to `forth-words', whenever a forth-mode
 Variables controlling interaction and startup      buffer is created. That variable should be set by Forth sources, using
  forth-percent-height      a local variables list at the end of file, to get file-specific
     Tells split how high to make the edit portion, in percent of the      hilighting.
     current screen height.      0 [IF]
  forth-program-name         Local Variables: ... 
     Tells the library which program name to execute in the interation         forth-local-words: ...
     window.         End:
       [THEN]
    forth-hilight-level
       Controls how much syntax hilighting is done. Should be in the range 
       0..3
   
 Variables controlling indentation style:  Variables controlling indentation style:
  forth-positives   `forth-indent-words'
     A string containing all words which causes the indent-level of the      List of words that influence indentation.
     following line to be incremented.   forth-local-indent-words
     OBS! Each word must be surronded by spaces.      List of words to prepend to `forth-indent-words', similar to 
  forth-negatives      forth-local-words. Should be used for specifying file-specific 
     A string containing all words which causes the indentation of the      indentation, using a local variables list.
     current line to be decremented, if the word begin the line. These   forth-custom-indent-words
     words also has a cancelling effect on the indent-level of the      List of words to prepend to `forth-indent-words'. Should be set in your
     following line, independent of position.      .emacs.    
     OBS! Each word must be surronded by spaces.  
  forth-zeroes  
     A string containing all words which causes the indentation of the  
     current line to go to zero, if the word begin the line.  
     OBS! Each word must be surronded by spaces.  
  forth-indent-level   forth-indent-level
     Indentation increment/decrement of Forth statements.      Indentation increment/decrement of Forth statements.
    forth-minor-indent-level
       Minor indentation increment/decrement of Forth statemens.
   
  Note! A word which decrements the indentation of the current line, may  Variables controlling block-file editing:
     also be mentioned in forth-positives to cause the indentation to   forth-show-screen
     resume the previous level.      Non-nil means, that the start of the current screen is marked by an
       overlay arrow, and screen numbers are displayed in the mode line.
 Variables controling documentation search      This variable is by default nil for `forth-mode' and t for 
  forth-help-load-path      `forth-block-mode'.
     List of directories to search through to find *.doc   forth-overlay-arrow-string
     (forth-help-file-suffix) files. Nil means current default directory.      String to display as the overlay arrow, when `forth-show-screen' is t.
     The specified directories must contain at least one .doc file. If it      Setting this variable to nil disables the overlay arrow.
     does not and you still want the load-path to scan that directory, create   forth-block-base
     an empty file dummy.doc.      Screen number of the first block in a block file. Defaults to 1.
  forth-help-file-suffix   forth-warn-long-lines
     The file names to search for in each directory specified by      Non-nil means that a warning message is displayed whenever you edit or
     forth-help-load-path. Defaulted to '*.doc'.       move over a line that is longer than 64 characters (the maximum line
 "      length that can be stored into a block file). This variable defaults to
       t for `forth-block-mode' and to nil for `forth-mode'.
   
   Variables controlling interaction with the Forth-process (also see
   `run-forth'):
     forth-program-name
       Program invoked by the `run-forth' command (including arguments).
     inferior-forth-mode-hook
       Hook for customising inferior-forth-mode.
     forth-compile-command
       Default command to execute on `compile'.
   " 
   (interactive)    (interactive)
   (kill-all-local-variables)    (kill-all-local-variables)
   (use-local-map forth-mode-map)    (use-local-map forth-mode-map)
   (setq mode-name "Forth")    (setq mode-name "Forth")
   (setq major-mode 'forth-mode)    (setq major-mode 'forth-mode)
     (forth-install-motion-hook)
     ;; convert buffer contents from block file format, if necessary
     (when (forth-detect-block-file-p)
       (widen)
       (message "Converting from Forth block source...")
       (forth-convert-from-block (point-min) (point-max))
       (message "Converting from Forth block source...done"))
     ;; if user switched from forth-block-mode to forth-mode, make sure the file
     ;; is now stored as normal strem source
     (when (equal buffer-file-format '(forth-blocks))
       (setq buffer-file-format nil))
   (forth-mode-variables)    (forth-mode-variables)
 ;  (if (not (forth-process-running-p))  ;  (if (not (forth-process-running-p))
 ;      (run-forth forth-program-name))  ;      (run-forth forth-program-name))
   (run-hooks 'forth-mode-hook))    (run-hooks 'forth-mode-hook))
   
 (setq forth-mode-hook  ;;;###autoload
   (define-derived-mode forth-block-mode forth-mode "Forth Block Source" 
     "Major mode for editing Forth block source files, derived from 
   `forth-mode'. Differences to `forth-mode' are:
    * files are converted to block format, when written (`buffer-file-format' 
      is set to `(forth-blocks)')
    * `forth-show-screen' and `forth-warn-long-lines' are t by default
     
   Note that the length of lines in block files is limited to 64 characters.
   When writing longer lines to a block file, a warning is displayed in the
   echo area and the line is truncated. 
   
   Another problem is imposed by block files that contain newline or tab 
   characters. When Emacs converts such files back to block file format, 
   it'll translate those characters to a number of spaces. However, when
   you read such a file, a warning message is displayed in the echo area,
   including a line number that may help you to locate and fix the problem.
   
   So have a look at the *Messages* buffer, whenever you hear (or see) Emacs' 
   bell during block file read/write operations."
     (setq buffer-file-format '(forth-blocks))
     (setq forth-show-screen t)
     (setq forth-warn-long-lines t)
     (setq forth-screen-number-string (format "%d" forth-block-base))
     (setq mode-line-format (append (reverse (cdr (reverse mode-line-format)))
                                    '("--S" forth-screen-number-string "-%-"))))
   
   (add-hook 'forth-mode-hook
       '(lambda ()         '(lambda () 
          (make-local-variable 'compile-command)           (make-local-variable 'compile-command)
          (setq compile-command "gforth ")))           (setq compile-command "gforth ")
            (forth-hack-local-variables)
            (forth-customize-words)
            (forth-compile-words)
            (unless (and forth-jit-parser (>= emacs-major-version 21))
              (forth-change-function (point-min) (point-max) nil t))))
   
 (defun forth-fill-paragraph ()   (defun forth-fill-paragraph () 
   "Fill comments (starting with '\'; do not fill code (block style    "Fill comments (starting with '\'; do not fill code (block style
Line 265  programmers who tend to fill code won't Line 1357  programmers who tend to fill code won't
           (1+ (current-column)))            (1+ (current-column)))
       comment-column)))        comment-column)))
   
 (defun forth-current-indentation ()  
   (save-excursion  
     (beginning-of-line)  
     (back-to-indentation)  
     (current-column)))  
   
 (defun forth-delete-indentation ()  
   (let ((b nil) (m nil))  
     (save-excursion  
       (beginning-of-line)  
       (setq b (point))  
       (back-to-indentation)  
       (setq m (point)))  
     (delete-region b m)))  
   
 (defun forth-indent-line (&optional flag)  
   "Correct indentation of the current Forth line."  
   (let ((x (forth-calculate-indent)))  
     (forth-indent-to x)))  
     
 (defun forth-indent-command ()  
   (interactive)  
   (forth-indent-line t))  
   
 (defun forth-indent-to (x)  
   (let ((p nil))  
     (setq p (- (current-column) (forth-current-indentation)))  
     (forth-delete-indentation)  
     (beginning-of-line)  
     (indent-to x)  
     (if (> p 0) (forward-char p))))  
   
 ;;Calculate indent  
 (defun forth-calculate-indent ()  
   (let ((w1 nil) (indent 0) (centre 0))  
     (save-excursion  
       (beginning-of-line)  
       (skip-chars-backward " \t\n")  
       (beginning-of-line)  
       (back-to-indentation)  
       (setq indent (current-column))  
       (setq centre indent)  
       (setq indent (+ indent (forth-sum-line-indentation))))  
     (save-excursion  
       (beginning-of-line)  
       (back-to-indentation)  
       (let ((p (point)))  
         (skip-chars-forward "^ \t\n")  
         (setq w1 (buffer-substring p (point)))))  
     (if (> (- indent centre) forth-indent-level)  
         (setq indent (+ centre forth-indent-level)))  
     (if (> (- centre indent) forth-indent-level)  
         (setq indent (- centre forth-indent-level)))  
     (if (< indent 0) (setq indent 0))  
     (setq indent (- indent  
                     (if (string-match   
                          (regexp-quote (concat " " w1 " "))  
                          forth-negatives)  
                         forth-indent-level 0)))  
     (if (string-match (regexp-quote (concat " " w1 " ")) forth-zdown)  
         (setq forth-zero 0))  
     (if (string-match (regexp-quote (concat " " w1 " ")) forth-zeroes)  
         (setq indent forth-zero))  
     (if (string-match (regexp-quote (concat " " w1 " ")) forth-zup)  
         (setq forth-zero 4))  
     indent))  
   
 (defun forth-sum-line-indentation ()  
   "Add upp the positive and negative weights of all words on the current line."  
   (let ((b (point)) (e nil) (sum 0) (w nil) (t1 nil) (t2 nil) (first t))  
     (end-of-line) (setq e (point))  
     (goto-char b)  
     (while (< (point) e)  
       (setq w (forth-next-word))  
       (setq t1 (string-match (regexp-quote (concat " " w " "))  
                              forth-positives))  
       (setq t2 (string-match (regexp-quote (concat " " w " "))  
                              forth-negatives))  
       (if t1  
           (setq sum (+ sum forth-indent-level)))  
       (if (and t2 (not first))  
           (setq sum (- sum forth-indent-level)))  
       (skip-chars-forward " \t")  
       (setq first nil))  
     sum))  
   
   
 (defun forth-next-word ()  
   "Return the next forth-word. Skip anything that the forth-word takes from  
 the input stream (comments, arguments, etc.)"  
 ;actually, it would be better to use commands based on the  
 ;syntax-table or comment-start etc.  
   (let ((w1 nil))  
     (while (not w1)  
       (skip-chars-forward " \t\n")  
       (let ((p (point)))  
         (skip-chars-forward "^ \t\n")  
         (setq w1 (buffer-substring p (point))))  
       (cond ((string-match "\"" w1)  
              (progn  
                (skip-chars-forward "^\"\n")  
                (forward-char)))  
             ((string-match "\\\\" w1)  
              (progn  
                (end-of-line)  
                ))  
             ((or (equal "(" w1) (equal ".(" w1))  
              (progn  
                (skip-chars-forward "^)\n")  
                (forward-char)))  
             ((string-match (regexp-quote (concat " " w1 " ")) forth-prefixes)  
              (progn (skip-chars-forward " \t\n")  
                     (skip-chars-forward "^ \t\n")))  
             (t nil)))  
     w1))  
         
   
 ;; Forth commands  ;; Forth commands
   
Line 389  the input stream (comments, arguments, e Line 1365  the input stream (comments, arguments, e
   (interactive)    (interactive)
   (query-replace-regexp "\\(~~ \\| ~~$\\)" "" nil))    (query-replace-regexp "\\(~~ \\| ~~$\\)" "" nil))
   
 (defvar forth-program-name "gforth"  (define-key forth-mode-map "\C-x\C-e" 'compile)
   "*Program invoked by the `run-forth' command.")  (define-key forth-mode-map "\C-x\C-n" 'next-error)
   (require 'compile)
 (defvar forth-band-name nil  
   "*Band loaded by the `run-forth' command.")  
   
 (defvar forth-program-arguments nil  
   "*Arguments passed to the Forth program by the `run-forth' command.")  
   
 (defun run-forth (command-line)  
   "Run an inferior Forth process. Output goes to the buffer `*forth*'.  
 With argument, asks for a command line. Split up screen and run forth   
 in the lower portion. The current-buffer when called will stay in the  
 upper portion of the screen, and all other windows are deleted.  
 Call run-forth again to make the *forth* buffer appear in the lower  
 part of the screen."  
   (interactive  
    (list (let ((default  
                  (or forth-process-command-line  
                      (forth-default-command-line))))  
            (if current-prefix-arg  
                (read-string "Run Forth: " default)  
                default))))  
   (setq forth-process-command-line command-line)  
   (forth-start-process command-line)  
   (forth-split)  
   (forth-set-runlight forth-runlight:input))  
   
 (defun run-forth-if-not ()  
   (if (not (forth-process-running-p))  
       (run-forth forth-program-name)))  
   
 (defun reset-forth ()  
   "Reset the Forth process."  
   (interactive)  
   (let ((process (get-process forth-program-name)))  
     (cond ((or (not process)  
                (not (eq (process-status process) 'run))  
                (yes-or-no-p  
 "The Forth process is running, are you SURE you want to reset it? "))  
            (message "Resetting Forth process...")  
            (forth-reload)  
            (message "Resetting Forth process...done")))))  
   
 (defun forth-default-command-line ()  
   (concat forth-program-name  
           (if forth-program-arguments  
               (concat " " forth-program-arguments)  
               "")))  
   
 ;;;; Internal Variables  
   
 (defvar forth-process-command-line nil  
   "Command used to start the most recent Forth process.")  
   
 (defvar forth-previous-send ""  
   "Most recent expression transmitted to the Forth process.")  
   
 (defvar forth-process-filter-queue '()  
   "Queue used to synchronize filter actions properly.")  
   
 (defvar forth-prompt "ok"  
   "The current forth prompt string.")  
   
 (defvar forth-start-hook nil  
   "If non-nil, a procedure to call when the Forth process is started.  
 When called, the current buffer will be the Forth process-buffer.")  
   
 (defvar forth-signal-death-message nil  
   "If non-nil, causes a message to be generated when the Forth process dies.")  
   
 (defvar forth-percent-height 50  
   "Tells run-forth how high the upper window should be in percent.")  
   
 (defconst forth-runlight:input ?I  
   "The character displayed when the Forth process is waiting for input.")  
   
 (defvar forth-mode-string ""  
   "String displayed in the mode line when the Forth process is running.")  
   
 ;;;; Evaluation Commands  
   
 (defun forth-send-string (&rest strings)  
   "Send the string arguments to the Forth process.  
 The strings are concatenated and terminated by a newline."  
   (cond ((forth-process-running-p)  
          (forth-send-string-1 strings))  
         ((yes-or-no-p "The Forth process has died.  Reset it? ")  
          (reset-forth)  
          (goto-char (point-max))  
          (forth-send-string-1 strings))))  
   
 (defun forth-send-string-1 (strings)  
   (let ((string (apply 'concat strings)))  
     (forth-send-string-2 string)))  
   
 (defun forth-send-string-2 (string)  
   (let ((process (get-process forth-program-name)))  
     (if (not (eq (current-buffer) (get-buffer forth-program-name)))  
         (progn  
          (forth-process-filter-output string)  
          (forth-process-filter:finish)))  
     (send-string process (concat string "\n"))  
     (if (eq (current-buffer) (process-buffer process))  
         (set-marker (process-mark process) (point)))))  
   
   
 (defun forth-send-region (start end)  
   "Send the current region to the Forth process.  
 The region is sent terminated by a newline."  
   (interactive "r")  
   (let ((process (get-process forth-program-name)))  
     (if (and process (eq (current-buffer) (process-buffer process)))  
         (progn (goto-char end)  
                (set-marker (process-mark process) end))))  
   (forth-send-string "\n" (buffer-substring start end) "\n"))  
   
 (defun forth-end-of-paragraph ()  
   (if (looking-at "[\t\n ]+") (skip-chars-backward  "\t\n "))  
   (if (not (re-search-forward "\n[ \t]*\n" nil t))  
       (goto-char (point-max))))  
   
 (defun forth-send-paragraph ()  
   "Send the current or the previous paragraph to the Forth process"  
   (interactive)  
   (let (end)  
     (save-excursion  
       (forth-end-of-paragraph)  
       (skip-chars-backward  "\t\n ")  
       (setq end (point))  
       (if (re-search-backward "\n[ \t]*\n" nil t)  
           (setq start (point))  
         (goto-char (point-min)))  
       (skip-chars-forward  "\t\n ")  
       (forth-send-region (point) end))))  
     
 (defun forth-send-buffer ()  
   "Send the current buffer to the Forth process."  
   (interactive)  
   (if (eq (current-buffer) (forth-process-buffer))  
       (error "Not allowed to send this buffer's contents to Forth"))  
   (forth-send-region (point-min) (point-max)))  
   
   
 ;;;; Basic Process Control  
   
 (defun forth-start-process (command-line)  
   (let ((buffer (get-buffer-create "*forth*")))  
     (let ((process (get-buffer-process buffer)))  
       (save-excursion  
         (set-buffer buffer)  
         (progn (if process (delete-process process))  
                (goto-char (point-max))  
                (setq mode-line-process '(": %s"))  
                (add-to-global-mode-string 'forth-mode-string)  
                (setq process  
                      (apply 'start-process  
                             (cons forth-program-name  
                                   (cons buffer  
                                         (forth-parse-command-line  
                                          command-line)))))  
                (set-marker (process-mark process) (point-max))  
                (forth-process-filter-initialize t)  
                (forth-modeline-initialize)  
                (set-process-sentinel process 'forth-process-sentinel)  
                (set-process-filter process 'forth-process-filter)  
                (run-hooks 'forth-start-hook)))  
     buffer)))  
   
 (defun forth-parse-command-line (string)  
   (setq string (substitute-in-file-name string))  
   (let ((start 0)  
         (result '()))  
     (while start  
       (let ((index (string-match "[ \t]" string start)))  
         (setq start  
               (cond ((not index)  
                      (setq result  
                            (cons (substring string start)  
                                  result))  
                      nil)  
                     ((= index start)  
                      (string-match "[^ \t]" string start))  
                     (t  
                      (setq result  
                            (cons (substring string start index)  
                                  result))  
                      (1+ index))))))  
     (nreverse result)))  
   
   
 (defun forth-process-running-p ()  
   "True iff there is a Forth process whose status is `run'."  
   (let ((process (get-process forth-program-name)))  
     (and process  
          (eq (process-status process) 'run))))  
   
 (defun forth-process-buffer ()  
   (let ((process (get-process forth-program-name)))  
     (and process (process-buffer process))))  
   
 ;;;; Process Filter  
   
 (defun forth-process-sentinel (proc reason)  
   (let ((inhibit-quit nil))  
     (forth-process-filter-initialize (eq reason 'run))  
     (if (eq reason 'run)  
         (forth-modeline-initialize)  
         (setq forth-mode-string "")))  
   (if (and (not (memq reason '(run stop)))  
            forth-signal-death-message)  
       (progn (beep)  
              (message  
 "The Forth process has died!  Do M-x reset-forth to restart it"))))  
   
 (defun forth-process-filter-initialize (running-p)  
   (setq forth-process-filter-queue (cons '() '()))  
   (setq forth-prompt "ok"))  
   
   
 (defun forth-process-filter (proc string)  
   (forth-process-filter-output string)  
   (forth-process-filter:finish))  
   
 (defun forth-process-filter:enqueue (action)  
   (let ((next (cons action '())))  
     (if (cdr forth-process-filter-queue)  
         (setcdr (cdr forth-process-filter-queue) next)  
         (setcar forth-process-filter-queue next))  
     (setcdr forth-process-filter-queue next)))  
   
 (defun forth-process-filter:finish ()  
   (while (car forth-process-filter-queue)  
     (let ((next (car forth-process-filter-queue)))  
       (setcar forth-process-filter-queue (cdr next))  
       (if (not (cdr next))  
           (setcdr forth-process-filter-queue '()))  
       (apply (car (car next)) (cdr (car next))))))  
   
 ;;;; Process Filter Output  
   
 (defun forth-process-filter-output (&rest args)  
   (if (not (and args  
                 (null (cdr args))  
                 (stringp (car args))  
                 (string-equal "" (car args))))  
       (forth-process-filter:enqueue  
        (cons 'forth-process-filter-output-1 args))))  
   
 (defun forth-process-filter-output-1 (&rest args)  
   (save-excursion  
     (forth-goto-output-point)  
     (apply 'insert-before-markers args)))  
   
 (defun forth-guarantee-newlines (n)  
   (save-excursion  
     (forth-goto-output-point)  
     (let ((stop nil))  
       (while (and (not stop)  
                   (bolp))  
         (setq n (1- n))  
         (if (bobp)  
             (setq stop t)  
           (backward-char))))  
     (forth-goto-output-point)  
     (while (> n 0)  
       (insert-before-markers ?\n)  
       (setq n (1- n)))))  
   
 (defun forth-goto-output-point ()  
   (let ((process (get-process forth-program-name)))  
     (set-buffer (process-buffer process))  
     (goto-char (process-mark process))))  
   
 (defun forth-modeline-initialize ()  
   (setq forth-mode-string "  "))  
   
 (defun forth-set-runlight (runlight)  
   (aset forth-mode-string 0 runlight)  
   (forth-modeline-redisplay))  
   
 (defun forth-modeline-redisplay ()  
   (save-excursion (set-buffer (other-buffer)))  
   (set-buffer-modified-p (buffer-modified-p))  
   (sit-for 0))  
   
 ;;;; Process Filter Operations  
   
 (defun add-to-global-mode-string (x)  
   (cond ((null global-mode-string)  
          (setq global-mode-string (list "" x " ")))  
         ((not (memq x global-mode-string))  
          (setq global-mode-string  
                (cons ""  
                      (cons x  
                            (cons " "  
                                  (if (equal "" (car global-mode-string))  
                                      (cdr global-mode-string)  
                                      global-mode-string))))))))  
   
   
 ;; Misc  
   
 (setq auto-mode-alist (append auto-mode-alist  (defvar forth-compile-command "gforth ")
                                 '(("\\.fs$" . forth-mode))))  ;(defvar forth-compilation-window-percent-height 30)
   
 (defun forth-split ()  (defun forth-split ()
   (interactive)    (interactive)
Line 709  The region is sent terminated by a newli Line 1386  The region is sent terminated by a newli
         (switch-to-buffer buffer)          (switch-to-buffer buffer)
         (goto-char (point-max))          (goto-char (point-max))
         (other-window 1))))          (other-window 1))))
       
 (defun forth-reload ()  
   (interactive)  
   (let ((process (get-process forth-program-name)))  
     (if process (kill-process process t)))  
   (sleep-for 0 100)  
   (forth-mode))  
   
   
 ;; Special section for forth-help  
   
 (defvar forth-help-buffer "*Forth-help*"  
   "Buffer used to display the requested documentation.")  
   
 (defvar forth-help-load-path nil  
   "List of directories to search through to find *.doc  
  (forth-help-file-suffix) files. Nil means current default directory.  
  The specified directories must contain at least one .doc file. If it  
  does not and you still want the load-path to scan that directory, create  
  an empty file dummy.doc.")  
   
 (defvar forth-help-file-suffix "*.doc"  
   "The file names to search for in each directory.")  
   
 (setq forth-search-command-prefix "grep -n \"^    [^(]* ")  
 (defvar forth-search-command-suffix "/dev/null")  
 (defvar forth-grep-error-regexp ": No such file or directory")  
   
 (defun forth-function-called-at-point ()  
   "Return the space delimited word a point."  
   (save-excursion  
     (save-restriction  
       (narrow-to-region (max (point-min) (- (point) 1000)) (point-max))  
       (skip-chars-backward "^ \t\n" (point-min))  
       (if (looking-at "[ \t\n]")  
           (forward-char 1))  
       (let (obj (p (point)))  
         (skip-chars-forward "^ \t\n")  
         (buffer-substring p (point))))))  
   
 (defun forth-help-names-extend-comp (path-list result)  
   (cond ((null path-list) result)  
         ((null (car path-list))  
          (forth-help-names-extend-comp (cdr path-list)   
                (concat result forth-help-file-suffix " ")))  
         (t (forth-help-names-extend-comp  
             (cdr path-list) (concat result  
                                     (expand-file-name (car path-list)) "/"  
                                     forth-help-file-suffix " ")))))  
   
 (defun forth-help-names-extended ()  
   (if forth-help-load-path  
       (forth-help-names-extend-comp forth-help-load-path "")  
     (error "forth-help-load-path not specified")))  
   
   
 ;(define-key forth-mode-map "\C-hf" 'forth-documentation)  
   
 (defun forth-documentation (function)  
   "Display the full documentation of FORTH word."  
   (interactive  
    (let ((fn (forth-function-called-at-point))  
          (enable-recursive-minibuffers t)              
          search-list  
          val)  
      (setq val (read-string (format "Describe forth word (default %s): " fn)))  
      (list (if (equal val "") fn val))))  
   (forth-get-doc (concat forth-search-command-prefix  
                          (grep-regexp-quote (concat function " ("))  
                          "[^)]*\-\-\" " (forth-help-names-extended)  
                          forth-search-command-suffix))  
   (message "C-x C-m switches back to the forth interaction window"))  
   
 (defun forth-get-doc (command)  
   "Display the full documentation of command."  
   (let ((curwin (get-buffer-window (window-buffer)))  
         reswin  
         pointmax)  
     (with-output-to-temp-buffer forth-help-buffer  
       (progn  
         (call-process "sh" nil forth-help-buffer t "-c" command)  
         (setq reswin (get-buffer-window forth-help-buffer))))  
     (setq reswin (get-buffer-window forth-help-buffer))  
     (select-window reswin)  
     (save-excursion  
       (goto-char (setq pointmax (point-max)))  
       (insert "--------------------\n\n"))  
     (let (fd doc)   
       (while (setq fd (forth-get-file-data pointmax))  
         (setq doc (forth-get-doc-string fd))  
         (save-excursion  
           (goto-char (point-max))  
           (insert (substring (car fd) (string-match "[^/]*$" (car fd)))  
                   ":\n\n" doc "\n")))  
       (if (not doc)  
           (progn (goto-char (point-max)) (insert "Not found"))))  
     (select-window curwin)))  
     
 (defun forth-skip-error-lines ()  
   (let ((lines 0))  
     (save-excursion  
       (while (re-search-forward forth-grep-error-regexp nil t)  
         (beginning-of-line)  
         (forward-line 1)  
         (setq lines (1+ lines))))  
     (forward-line lines)))  
   
 (defun forth-get-doc-string (fd)  
   "Find file (car fd) and extract documentation from line (nth 1 fd)."  
   (let (result)  
     (save-window-excursion  
       (find-file (car fd))  
       (goto-line (nth 1 fd))  
       (if (not (eq (nth 1 fd) (1+ (count-lines (point-min) (point)))))  
           (error "forth-get-doc-string: serious error"))  
       (if (not (re-search-backward "\n[\t ]*\n" nil t))  
           (goto-char (point-min))  
         (goto-char (match-end 0)))  
       (let ((p (point)))  
         (if (not (re-search-forward "\n[\t ]*\n" nil t))  
             (goto-char (point-max)))  
         (setq result (buffer-substring p (point))))  
       (bury-buffer (current-buffer)))  
     result))  
   
 (defun forth-get-file-data (limit)  
   "Parse grep output and return '(filename line#) list. Return nil when  
  passing limit."  
   (forth-skip-error-lines)  
   (if (< (point) limit)  
       (let ((result (forth-get-file-data-cont limit)))  
         (forward-line 1)  
         (beginning-of-line)  
         result)))  
   
 (defun forth-get-file-data-cont (limit)  
   (let (result)  
     (let ((p (point)))  
       (skip-chars-forward "^:")  
       (setq result (buffer-substring p (point))))  
     (if (< (point) limit)  
         (let ((p (1+ (point))))  
           (forward-char 1)  
           (skip-chars-forward "^:")  
           (list result (string-to-int (buffer-substring p (point))))))))  
   
 (defun grep-regexp-quote (str)  
   (let ((i 0) (m 1) (res ""))  
     (while (/= m 0)  
       (setq m (string-to-char (substring str i)))  
       (if (/= m 0)  
           (progn  
             (setq i (1+ i))  
             (if (string-match (regexp-quote (char-to-string m))  
                               ".*\\^$[]")  
                 (setq res (concat res "\\")))  
             (setq res (concat res (char-to-string m))))))  
     res))  
   
   
 (define-key forth-mode-map "\C-x\C-e" 'compile)  
 (define-key forth-mode-map "\C-x\C-n" 'next-error)  
 (require 'compile "compile")  
   
 (defvar forth-compile-command "gforth ")  
 ;(defvar forth-compilation-window-percent-height 30)  
   
 (defun forth-compile (command)  (defun forth-compile (command)
   (interactive (list (setq forth-compile-command (read-string "Compile command: " forth-compile-command))))    (interactive (list (setq forth-compile-command (read-string "Compile command: " forth-compile-command))))
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   (setq ctools-compile-command command)    (setq ctools-compile-command command)
   (compile1 ctools-compile-command "No more errors"))    (compile1 ctools-compile-command "No more errors"))
   
   
 ;;; Forth menu  ;;; Forth menu
 ;;; Mikael Karlsson <qramika@eras70.ericsson.se>  ;;; Mikael Karlsson <qramika@eras70.ericsson.se>
   
 (cond ((string-match "XEmacs\\|Lucid" emacs-version)  ;; (dk) code commented out due to complaints of XEmacs users.  After
        (require 'func-menu)  ;; all, there's imenu/speedbar, which uses much smarter scanning
   ;; rules.
   
   ;; (cond ((string-match "XEmacs\\|Lucid" emacs-version)
   ;;        (require 'func-menu)
   
   ;;   (defconst fume-function-name-regexp-forth
   ;;    "^\\(:\\)[ \t]+\\([^ \t]*\\)"
   ;;    "Expression to get word definitions in Forth.")
   
   ;;   (setq fume-function-name-regexp-alist
   ;;       (append '((forth-mode . fume-function-name-regexp-forth) 
   ;;              ) fume-function-name-regexp-alist))
   
   ;;   ;; Find next forth word in the buffer
   ;;   (defun fume-find-next-forth-function-name (buffer)
   ;;     "Searches for the next forth word in BUFFER."
   ;;     (set-buffer buffer)
   ;;     (if (re-search-forward fume-function-name-regexp nil t)
   ;;       (let ((beg (match-beginning 2))
   ;;             (end (match-end 2)))
   ;;         (cons (buffer-substring beg end) beg))))
   
   (defconst fume-function-name-regexp-forth  ;;   (setq fume-find-function-name-method-alist
    "^\\(:\\)[ \t]+\\([^ \t]*\\)"  ;;   (append '((forth-mode    . fume-find-next-forth-function-name))))
    "Expression to get word definitions in Forth.")  
   
   (setq fume-function-name-regexp-alist  
       (append '((forth-mode . fume-function-name-regexp-forth)   
              ) fume-function-name-regexp-alist))  
   
   ;; Find next forth word in the buffer  
   (defun fume-find-next-forth-function-name (buffer)  
     "Searches for the next forth word in BUFFER."  
     (set-buffer buffer)  
     (if (re-search-forward fume-function-name-regexp nil t)  
       (let ((beg (match-beginning 2))  
             (end (match-end 2)))  
         (cons (buffer-substring beg end) beg))))  
   
   (setq fume-find-function-name-method-alist  ;;   ))
   (append '((forth-mode    . fume-find-next-forth-function-name))))  
   
   ))  
 ;;; End Forth menu  ;;; End Forth menu
   
 ;;; File folding of forth-files  ;;; File folding of forth-files
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 ;;; Works most of the times but loses sync with the cursor occasionally   ;;; Works most of the times but loses sync with the cursor occasionally 
 ;;; Could be improved by also folding on comments  ;;; Could be improved by also folding on comments
   
 (require 'outline)  ;; (dk) This code needs a rewrite; just too ugly and doesn't use the
   ;; newer and smarter scanning rules of `imenu'. Who needs it anyway??
   
   ;; (require 'outline)
   
 (defun f-outline-level ()  ;; (defun f-outline-level ()
         (cond   ((looking-at "\\`\\\\")  ;;   (cond      ((looking-at "\\`\\\\")
                         0)  ;;       0)
                 ((looking-at "\\\\ SEC")  ;;      ((looking-at "\\\\ SEC")
                         0)  ;;       0)
                 ((looking-at "\\\\ \\\\ .*")  ;;      ((looking-at "\\\\ \\\\ .*")
                         0)  ;;       0)
                 ((looking-at "\\\\ DEFS")  ;;      ((looking-at "\\\\ DEFS")
                         1)  ;;       1)
                 ((looking-at "\\/\\* ")  ;;      ((looking-at "\\/\\* ")
                         1)  ;;       1)
                 ((looking-at ": .*")  ;;      ((looking-at ": .*")
                         1)  ;;       1)
                 ((looking-at "\\\\G")  ;;      ((looking-at "\\\\G")
                         2)  ;;       2)
                 ((looking-at "[ \t]+\\\\")  ;;      ((looking-at "[ \t]+\\\\")
                         3))  ;;       3)))
 )                           
   ;; (defun fold-f  ()
 (defun fold-f  ()  ;;    (interactive)
    (interactive)  ;;    (add-hook 'outline-minor-mode-hook 'hide-body)
    (add-hook 'outline-minor-mode-hook 'hide-body)  
   ;;    ; outline mode header start, i.e. find word definitions
    ; outline mode header start, i.e. find word definitions  ;; ;;;   (setq  outline-regexp  "^\\(:\\)[ \t]+\\([^ \t]*\\)")
 ;;;   (setq  outline-regexp  "^\\(:\\)[ \t]+\\([^ \t]*\\)")  ;;    (setq  outline-regexp  "\\`\\\\\\|:\\|\\\\ SEC\\|\\\\G\\|[ \t]+\\\\\\|\\\\ DEFS\\|\\/\\*\\|\\\\ \\\\ .*")
    (setq  outline-regexp  "\\`\\\\\\|:\\|\\\\ SEC\\|\\\\G\\|[ \t]+\\\\\\|\\\\ DEFS\\|\\/\\*\\|\\\\ \\\\ .*")  ;;    (setq outline-level 'f-outline-level)
    (setq outline-level 'f-outline-level)  
   ;;    (outline-minor-mode)
    (outline-minor-mode)  ;;    (define-key outline-minor-mode-map '(shift up) 'hide-sublevels)
    (define-key outline-minor-mode-map '(shift up) 'hide-sublevels)  ;;    (define-key outline-minor-mode-map '(shift right) 'show-children)
    (define-key outline-minor-mode-map '(shift right) 'show-children)  ;;    (define-key outline-minor-mode-map '(shift left) 'hide-subtree)
    (define-key outline-minor-mode-map '(shift left) 'hide-subtree)  ;;    (define-key outline-minor-mode-map '(shift down) 'show-subtree))
    (define-key outline-minor-mode-map '(shift down) 'show-subtree)  
   
 )  
   
 ;;(define-key global-map '(shift up) 'fold-f)  ;;(define-key global-map '(shift up) 'fold-f)
   
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 ;;; for all of the recognized languages.  Scanning the buffer takes some time,  ;;; for all of the recognized languages.  Scanning the buffer takes some time,
 ;;; but not much.  ;;; but not much.
 ;;;  ;;;
 (cond ((string-match "XEmacs\\|Lucid" emacs-version)  ;; (cond ((string-match "XEmacs\\|Lucid" emacs-version)
        (require 'func-menu)  ;;        (require 'func-menu)
 ;;       (define-key global-map 'f8 'function-menu)  ;; ;;       (define-key global-map 'f8 'function-menu)
        (add-hook 'find-fible-hooks 'fume-add-menubar-entry)  ;;        (add-hook 'find-fible-hooks 'fume-add-menubar-entry)
 ;       (define-key global-map "\C-cg" 'fume-prompt-function-goto)  ;; ;       (define-key global-map "\C-cg" 'fume-prompt-function-goto)
 ;       (define-key global-map '(shift button3) 'mouse-function-menu)  ;; ;       (define-key global-map '(shift button3) 'mouse-function-menu)
 ))  ;; ))
   
   ;;;
   ;;; Inferior Forth interpreter 
   ;;;     -- mostly copied from `cmuscheme.el' of Emacs 21.2
   ;;;
   
   (eval-and-compile (forth-require 'comint))
   
   (when (memq 'comint features)
   
     (defvar forth-program-name "gforth"
       "*Program invoked by the `run-forth' command, including program arguments")
   
     (defcustom inferior-forth-mode-hook nil
       "*Hook for customising inferior-forth-mode."
       :type 'hook
       :group 'forth)
   
     (defvar inferior-forth-mode-map
       (let ((m (make-sparse-keymap)))
         (define-key m "\r" 'comint-send-input)
         (define-key m "\M-\C-x" 'forth-send-paragraph-and-go)
         (define-key m "\C-c\C-l" 'forth-load-file)
         m))
     ;; Install the process communication commands in the forth-mode keymap.
     (define-key forth-mode-map "\e\C-m" 'forth-send-paragraph-and-go)
     (define-key forth-mode-map "\eo" 'forth-send-buffer-and-go)
   
     (define-key forth-mode-map "\M-\C-x" 'forth-send-paragraph-and-go)
     (define-key forth-mode-map "\C-c\C-r" 'forth-send-region)
     (define-key forth-mode-map "\C-c\M-r" 'forth-send-region-and-go)
     (define-key forth-mode-map "\C-c\C-z" 'forth-switch-to-interactive)
     (define-key forth-mode-map "\C-c\C-l" 'forth-load-file)
   
     (defvar forth-process-buffer)
   
     (define-derived-mode inferior-forth-mode comint-mode "Inferior Forth"
       "Major mode for interacting with an inferior Forth process.
   
   The following commands are available:
   \\{inferior-forth-mode-map}
   
   A Forth process can be fired up with M-x run-forth.
   
   Customisation: Entry to this mode runs the hooks on comint-mode-hook and
   inferior-forth-mode-hook (in that order).
   
   You can send text to the inferior Forth process from other buffers containing
   Forth source.
       forth-switch-to-interactive switches the current buffer to the Forth
           process buffer. 
       forth-send-paragraph sends the current paragraph to the Forth process.
       forth-send-region sends the current region to the Forth process.
       forth-send-buffer sends the current buffer to the Forth process.
   
       forth-send-paragraph-and-go, forth-send-region-and-go,
           forth-send-buffer-and-go switch to the Forth process buffer after
           sending their text.
   For information on running multiple processes in multiple buffers, see
   documentation for variable `forth-process-buffer'.
   
   Commands:
   Return after the end of the process' output sends the text from the
   end of process to point. If you accidentally suspend your process, use
   \\[comint-continue-subjob] to continue it. "
       ;; Customise in inferior-forth-mode-hook
       (setq comint-prompt-regexp "^") 
       (setq mode-line-process '(":%s")))
   
     (defun forth-args-to-list (string)
       (let ((where (string-match "[ \t]" string)))
         (cond ((null where) (list string))
               ((not (= where 0))
                (cons (substring string 0 where)
                      (forth-args-to-list (substring string (+ 1 where)
                                                     (length string)))))
               (t (let ((pos (string-match "[^ \t]" string)))
                    (if (null pos)
                        nil
                      (forth-args-to-list (substring string pos
                                                     (length string)))))))))
   
   ;;;###autoload
     (defun run-forth (cmd)
       "Run an inferior Forth process, input and output via buffer *forth*.
   If there is a process already running in `*forth*', switch to that buffer.
   With argument, allows you to edit the command line (default is value
   of `forth-program-name').  Runs the hooks `inferior-forth-mode-hook'
   \(after the `comint-mode-hook' is run).
   \(Type \\[describe-mode] in the process buffer for a list of commands.)"
   
       (interactive (list (if current-prefix-arg
                              (read-string "Run Forth: " forth-program-name)
                            forth-program-name)))
       (if (not (comint-check-proc "*forth*"))
           (let ((cmdlist (forth-args-to-list cmd)))
             (set-buffer (apply 'make-comint "forth" (car cmdlist)
                                nil (cdr cmdlist)))
             (inferior-forth-mode)))
       (setq forth-program-name cmd)
       (setq forth-process-buffer "*forth*")
       (pop-to-buffer "*forth*"))
   
     (defun forth-send-region (start end)
       "Send the current region to the inferior Forth process."
       (interactive "r")
       (comint-send-region (forth-proc) start end)
       (comint-send-string (forth-proc) "\n"))
   
     (defun forth-end-of-paragraph ()
       (if (looking-at "[\t\n ]+") (skip-chars-backward  "\t\n "))
       (if (not (re-search-forward "\n[ \t]*\n" nil t))
           (goto-char (point-max))))
   
     (defun forth-send-paragraph ()
       "Send the current or the previous paragraph to the Forth process"
       (interactive)
       (let (end)
         (save-excursion
           (forth-end-of-paragraph)
           (skip-chars-backward  "\t\n ")
           (setq end (point))
           (if (re-search-backward "\n[ \t]*\n" nil t)
               (setq start (point))
             (goto-char (point-min)))
           (skip-chars-forward  "\t\n ")
           (forth-send-region (point) end))))
   
     (defun forth-send-paragraph-and-go ()
       "Send the current or the previous paragraph to the Forth process.
   Then switch to the process buffer."
       (interactive)
       (forth-send-paragraph)
       (forth-switch-to-interactive t))
   
     (defun forth-send-buffer ()
       "Send the current buffer to the Forth process."
       (interactive)
       (if (eq (current-buffer) forth-process-buffer)
           (error "Not allowed to send this buffer's contents to Forth"))
       (forth-send-region (point-min) (point-max)))
   
     (defun forth-send-buffer-and-go ()
       "Send the current buffer to the Forth process.
   Then switch to the process buffer."
       (interactive)
       (forth-send-buffer)
       (forth-switch-to-interactive t))
   
   
     (defun forth-switch-to-interactive (eob-p)
       "Switch to the Forth process buffer.
   With argument, position cursor at end of buffer."
       (interactive "P")
       (if (get-buffer forth-process-buffer)
           (pop-to-buffer forth-process-buffer)
         (error "No current process buffer.  See variable `forth-process-buffer'"))
       (cond (eob-p
              (push-mark)
              (goto-char (point-max)))))
   
     (defun forth-send-region-and-go (start end)
       "Send the current region to the inferior Forth process.
   Then switch to the process buffer."
       (interactive "r")
       (forth-send-region start end)
       (forth-switch-to-interactive t))
   
     (defcustom forth-source-modes '(forth-mode forth-block-mode)
       "*Used to determine if a buffer contains Forth source code.
   If it's loaded into a buffer that is in one of these major modes, it's
   considered a Forth source file by `forth-load-file' and `forth-compile-file'.
   Used by these commands to determine defaults."
       :type '(repeat function)
       :group 'forth)
   
     (defvar forth-prev-l/c-dir/file nil
       "Caches the last (directory . file) pair.
   Caches the last pair used in the last `forth-load-file' or
   `forth-compile-file' command. Used for determining the default in the
   next one.")
   
     (defun forth-load-file (file-name)
       "Load a Forth file FILE-NAME into the inferior Forth process."
       (interactive (comint-get-source "Load Forth file: " forth-prev-l/c-dir/file
                                       forth-source-modes t)) ; T because LOAD
                                           ; needs an exact name
       (comint-check-source file-name) ; Check to see if buffer needs saved.
       (setq forth-prev-l/c-dir/file (cons (file-name-directory    file-name)
                                           (file-name-nondirectory file-name)))
       (comint-send-string (forth-proc) (concat "(load \""
                                                file-name
                                                "\"\)\n")))
   
   
    
     (defvar forth-process-buffer nil "*The current Forth process buffer.
   
   See `scheme-buffer' for an explanation on how to run multiple Forth 
   processes.")
   
     (defun forth-proc ()
       "Return the current Forth process.  See variable `forth-process-buffer'."
       (let ((proc (get-buffer-process (if (eq major-mode 'inferior-forth-mode)
                                           (current-buffer)
                                         forth-process-buffer))))
         (or proc
             (error "No current process.  See variable `forth-process-buffer'"))))
     )  ; (memq 'comint features)
   
 ;; end  (provide 'forth-mode)
   
   ;;; gforth.el ends here

Removed from v.1.30  
changed lines
  Added in v.1.66


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