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[Emacs-diffs] /srv/bzr/emacs/trunk r103009: Port features from the previ


From: Stefan Monnier
Subject: [Emacs-diffs] /srv/bzr/emacs/trunk r103009: Port features from the previous prolog.el to the new one.
Date: Fri, 28 Jan 2011 14:46:58 -0500
User-agent: Bazaar (2.0.3)

------------------------------------------------------------
revno: 103009
committer: Stefan Monnier <address@hidden>
branch nick: trunk
timestamp: Fri 2011-01-28 14:46:58 -0500
message:
  Port features from the previous prolog.el to the new one.
  * lisp/progmodes/prolog.el (prolog-system): Add GNU and ECLiPSe options.
  (prolog-program-name, prolog-program-switches, prolog-consult-string)
  (prolog-compile-string, prolog-prompt-regexp): Get rid of the <foo>-i
  variable and use a function to compute the value dynamically.
  (prolog-prompt-regexp): Add regexp for GNU Prolog.
  (prolog-continued-prompt-regexp): Remove, unused.
  (prolog-find-value-by-system): Try and use the value of prolog-system
  in the *prolog* buffer if it helps.
  (prolog-mode-keybindings-common): Bind C-c C-z unconditionally...
  (prolog-zip-on): ..and check prolog-system and version here instead.
  (prolog-inferior-self-insert-command): New command.
  (prolog-inferior-mode-map): Use it.
  (prolog-inferior-error-regexp-alist): New var.
  (prolog-inferior-mode): Use it, along with compilation-shell-minor-mode.
  (prolog-input-filter): Use derived-mode-p.
  (prolog-inferior-guess-flavor): New function.
  (prolog-ensure-process): Use it.  Use make-comint-in-buffer rather than
  make-comint to avoid running comint-mode twice.
  (prolog-inferior-buffer): New fun.
  (prolog-old-process-region, prolog-old-process-file):
  Don't call prolog-bsts here...
  (prolog-build-prolog-command): ...do it here instead.
  (prolog-old-process-region, prolog-old-process-file):
  Use compilation-fake-loc and compilation-forget-errors.
  (prolog-consult-compile-region): Use bolp.
modified:
  lisp/ChangeLog
  lisp/progmodes/prolog.el
=== modified file 'lisp/ChangeLog'
--- a/lisp/ChangeLog    2011-01-28 19:13:01 +0000
+++ b/lisp/ChangeLog    2011-01-28 19:46:58 +0000
@@ -1,3 +1,32 @@
+2011-01-28  Stefan Monnier  <address@hidden>
+
+       Port features from the previous prolog.el to the new one.
+       * progmodes/prolog.el (prolog-system): Add GNU and ECLiPSe options.
+       (prolog-program-name, prolog-program-switches, prolog-consult-string)
+       (prolog-compile-string, prolog-prompt-regexp): Get rid of the <foo>-i
+       variable and use a function to compute the value dynamically.
+       (prolog-prompt-regexp): Add regexp for GNU Prolog.
+       (prolog-continued-prompt-regexp): Remove, unused.
+       (prolog-find-value-by-system): Try and use the value of prolog-system
+       in the *prolog* buffer if it helps.
+       (prolog-mode-keybindings-common): Bind C-c C-z unconditionally...
+       (prolog-zip-on): ..and check prolog-system and version here instead.
+       (prolog-inferior-self-insert-command): New command.
+       (prolog-inferior-mode-map): Use it.
+       (prolog-inferior-error-regexp-alist): New var.
+       (prolog-inferior-mode): Use it, along with compilation-shell-minor-mode.
+       (prolog-input-filter): Use derived-mode-p.
+       (prolog-inferior-guess-flavor): New function.
+       (prolog-ensure-process): Use it.  Use make-comint-in-buffer rather than
+       make-comint to avoid running comint-mode twice.
+       (prolog-inferior-buffer): New fun.
+       (prolog-old-process-region, prolog-old-process-file):
+       Don't call prolog-bsts here...
+       (prolog-build-prolog-command): ...do it here instead.
+       (prolog-old-process-region, prolog-old-process-file):
+       Use compilation-fake-loc and compilation-forget-errors.
+       (prolog-consult-compile-region): Use bolp.
+
 2011-01-28  Chong Yidong  <address@hidden>
 
        * image-mode.el (image-display-size): Doc fix (Bug#7820).

=== modified file 'lisp/progmodes/prolog.el'
--- a/lisp/progmodes/prolog.el  2011-01-25 04:08:28 +0000
+++ b/lisp/progmodes/prolog.el  2011-01-28 19:46:58 +0000
@@ -344,6 +344,10 @@
   :group 'prolog
   :type '(choice (const :tag "SICStus" :value sicstus)
                  (const :tag "SWI Prolog" :value swi)
+                 (const :tag "GNU Prolog" :value gnu)
+                 (const :tag "ECLiPSe Prolog" :value eclipse)
+                 ;; Mercury shouldn't be needed since we have a separate
+                 ;; major mode for it.
                  (const :tag "Default" :value nil)))
 (make-variable-buffer-local 'prolog-system)
 
@@ -356,6 +360,7 @@
     (mercury  (0 . 0))
     (eclipse  (3 . 7))
     (gnu      (0 . 0)))
+  ;; FIXME: This should be auto-detected instead of user-provided.
   "*Alist of Prolog system versions.
 The version numbers are of the format (Major . Minor)."
   :group 'prolog)
@@ -568,6 +573,8 @@
   "*Alist of program names for invoking an inferior Prolog with `run-prolog'."
   :group 'prolog-inferior
   :type 'sexp)
+(defun prolog-program-name ()
+  (prolog-find-value-by-system prolog-program-name))
 
 (defcustom prolog-program-switches
   '((sicstus ("-i"))
@@ -575,6 +582,8 @@
   "*Alist of switches given to inferior Prolog run with `run-prolog'."
   :group 'prolog-inferior
   :type 'sexp)
+(defun prolog-program-switches ()
+  (prolog-find-value-by-system prolog-program-switches))
 
 (defcustom prolog-consult-string
   '((eclipse "[%f].")
@@ -596,6 +605,8 @@
      the region."
   :group 'prolog-inferior
   :type 'sexp)
+(defun prolog-consult-string ()
+  (prolog-find-value-by-system prolog-consult-string))
 
 (defcustom prolog-compile-string
   '((eclipse "[%f].")
@@ -619,6 +630,8 @@
 If `prolog-program-name' is nil, it is an argument to the `compile' function."
   :group 'prolog-inferior
   :type 'sexp)
+(defun prolog-compile-string ()
+  (prolog-find-value-by-system prolog-compile-string))
 
 (defcustom prolog-eof-string "end_of_file.\n"
   "*Alist of strings that represent end of file for prolog.
@@ -630,17 +643,20 @@
   '((eclipse "^[a-zA-Z0-9()]* *\\?- \\|^\\[[a-zA-Z]* [0-9]*\\]:")
     (sicstus "| [ ?][- ] *")
     (swi "^\\(\\[[a-zA-Z]*\\] \\)?[1-9]?[0-9]*[ ]?\\?- \\|^| +")
-    (t "^ *\\?-"))
+    (gnu "^| \\?-")
+    (t "^|? *\\?-"))
   "*Alist of prompts of the prolog system command line."
   :group 'prolog-inferior
   :type 'sexp)
+(defun prolog-prompt-regexp ()
+  (prolog-find-value-by-system prolog-prompt-regexp))
 
-(defcustom prolog-continued-prompt-regexp
-  '((sicstus "^\\(| +\\|     +\\)")
-    (t "^|: +"))
-  "*Alist of regexps matching the prompt when consulting `user'."
-  :group 'prolog-inferior
-  :type 'sexp)
+;; (defcustom prolog-continued-prompt-regexp
+;;   '((sicstus "^\\(| +\\|     +\\)")
+;;     (t "^|: +"))
+;;   "*Alist of regexps matching the prompt when consulting `user'."
+;;   :group 'prolog-inferior
+;;   :type 'sexp)
 
 (defcustom prolog-debug-on-string "debug.\n"
   "*Predicate for enabling debug mode."
@@ -786,9 +802,9 @@
 (defvar prolog-atom-regexp ""
   "Set by prolog-set-atom-regexps.")
 
-(defconst prolog-left-paren "[[({]"
+(defconst prolog-left-paren "[[({]"     ;FIXME: Why not \\s(?
   "The characters used as left parentheses for the indentation code.")
-(defconst prolog-right-paren "[])}]"
+(defconst prolog-right-paren "[])}]"    ;FIXME: Why not \\s)?
   "The characters used as right parentheses for the indentation code.")
 
 (defconst prolog-quoted-atom-regexp
@@ -809,13 +825,8 @@
 (defvar prolog-mode-specificators-i nil)
 (defvar prolog-determinism-specificators-i nil)
 (defvar prolog-directives-i nil)
-(defvar prolog-program-name-i nil)
-(defvar prolog-program-switches-i nil)
-(defvar prolog-consult-string-i nil)
-(defvar prolog-compile-string-i nil)
 (defvar prolog-eof-string-i nil)
-(defvar prolog-prompt-regexp-i nil)
-(defvar prolog-continued-prompt-regexp-i nil)
+;; (defvar prolog-continued-prompt-regexp-i nil)
 (defvar prolog-help-function-i nil)
 
 (defvar prolog-align-rules
@@ -856,24 +867,27 @@
 
 (defun prolog-find-value-by-system (alist)
   "Get value from ALIST according to `prolog-system'."
-  (if (listp alist)
-      (let (result
-            id)
-        (while alist
-          (setq id (car (car alist)))
-          (if (or (eq id prolog-system)
-                  (eq id t)
-                  (and (listp id)
-                       (eval id)))
-              (progn
-                (setq result (car (cdr (car alist))))
-                (if (and (listp result)
-                         (eq (car result) 'eval))
-                    (setq result (eval (car (cdr result)))))
-                (setq alist nil))
-            (setq alist (cdr alist))))
-        result)
-    alist))
+  (let ((system (or prolog-system
+                    (buffer-local-value 'prolog-system
+                                        (prolog-inferior-buffer 'dont-run)))))
+    (if (listp alist)
+        (let (result
+              id)
+          (while alist
+            (setq id (car (car alist)))
+            (if (or (eq id system)
+                    (eq id t)
+                    (and (listp id)
+                         (eval id)))
+                (progn
+                  (setq result (car (cdr (car alist))))
+                  (if (and (listp result)
+                           (eq (car result) 'eval))
+                      (setq result (eval (car (cdr result)))))
+                  (setq alist nil))
+              (setq alist (cdr alist))))
+          result)
+      alist)))
 
 (defconst prolog-syntax-propertize-function
   (when (fboundp 'syntax-propertize-rules)
@@ -914,14 +928,13 @@
   ;; Initialize Prolog system specific variables
   (dolist (var '(prolog-keywords prolog-types prolog-mode-specificators
                  prolog-determinism-specificators prolog-directives
-                 prolog-program-name prolog-program-switches
-                 prolog-consult-string prolog-compile-string prolog-eof-string
-                 prolog-prompt-regexp prolog-continued-prompt-regexp
+                 prolog-eof-string
+                 ;; prolog-continued-prompt-regexp
                  prolog-help-function))
     (set (intern (concat (symbol-name var) "-i"))
          (prolog-find-value-by-system (symbol-value var))))
-  (when (null prolog-program-name-i)
-    (set (make-local-variable 'compile-command) prolog-compile-string-i))
+  (when (null (prolog-program-name))
+    (set (make-local-variable 'compile-command) (prolog-compile-string)))
   (set (make-local-variable 'font-lock-defaults)
        '(prolog-font-lock-keywords nil nil ((?_ . "w"))))
   (set (make-local-variable 'syntax-propertize-function)
@@ -934,9 +947,7 @@
   (define-key map "\C-c/" 'prolog-help-apropos)
   (define-key map "\C-c\C-d" 'prolog-debug-on)
   (define-key map "\C-c\C-t" 'prolog-trace-on)
-  (if (and (eq prolog-system 'sicstus)
-           (prolog-atleast-version '(3 . 7)))
-      (define-key map "\C-c\C-z" 'prolog-zip-on))
+  (define-key map "\C-c\C-z" 'prolog-zip-on)
   (define-key map "\C-c\r" 'run-prolog))
 
 (defun prolog-mode-keybindings-edit (map)
@@ -1074,11 +1085,47 @@
   (let ((map (make-sparse-keymap)))
     (prolog-mode-keybindings-common map)
     (prolog-mode-keybindings-inferior map)
+    (define-key map [remap self-insert-command]
+      'prolog-inferior-self-insert-command)
     map))
 
 (defvar prolog-inferior-mode-hook nil
   "List of functions to call after the inferior prolog mode has initialised.")
 
+(defvar prolog-inferior-error-regexp-alist
+  '(;; GNU Prolog used to not follow the GNU standard format.
+    ;; ("^\\(.*?\\):\\([0-9]+\\) error: .*(char:\\([0-9]+\\)" 1 2 3)
+    ;; SWI-Prolog.
+    ("^\\(?:\\?- *\\)?\\(\\(?:ERROR\\|\\(W\\)arning\\): 
*\\(.*?\\):\\([1-9][0-9]*\\):\\(?:\\([0-9]*\\):\\)?\\)\\(?:$\\| \\)"
+     3 4 5 (2 . nil) 1)
+    ;; GNU-Prolog now uses the GNU standard format.
+    gnu))
+
+(defun prolog-inferior-self-insert-command ()
+  "Insert the char in the buffer or pass it directly to the process."
+  (interactive)
+  (let* ((proc (get-buffer-process (current-buffer)))
+         (pmark (and proc (marker-position (process-mark proc)))))
+    ;; FIXME: the same treatment would be needed for SWI-Prolog, but I can't
+    ;; seem to find any way for Emacs to figure out when to use it because
+    ;; SWI doesn't include a " ? " or some such recognizable marker.
+    (if (and (eq prolog-system 'gnu)
+             pmark
+             (null current-prefix-arg)
+             (eobp)
+             (eq (point) pmark)
+             (save-excursion
+               (goto-char (- pmark 3))
+               ;; FIXME: check this comes from the process's output, maybe?
+               (looking-at " \\? ")))
+        ;; This is GNU prolog waiting to know whether you want more answers
+        ;; or not (or abort, etc...).  The answer is a single char, not
+        ;; a line, so pass this char directly rather than wait for RET to
+        ;; send a whole line.
+        (comint-send-string proc (string last-command-event))
+      (call-interactively 'self-insert-command))))
+
+
 (define-derived-mode prolog-inferior-mode comint-mode "Inferior Prolog"
   "Major mode for interacting with an inferior Prolog process.
 
@@ -1111,13 +1158,16 @@
   (setq comint-input-filter 'prolog-input-filter)
   (setq mode-line-process '(": %s"))
   (prolog-mode-variables)
-  (setq comint-prompt-regexp prolog-prompt-regexp-i)
+  (setq comint-prompt-regexp (prolog-prompt-regexp))
   (set (make-local-variable 'shell-dirstack-query) "pwd.")
+  (set (make-local-variable 'compilation-error-regexp-alist)
+       prolog-inferior-error-regexp-alist)
+  (compilation-shell-minor-mode)
   (prolog-inferior-menu))
 
 (defun prolog-input-filter (str)
   (cond ((string-match "\\`\\s *\\'" str) nil) ;whitespace
-        ((not (eq major-mode 'prolog-inferior-mode)) t)
+        ((not (derived-mode-p 'prolog-inferior-mode)) t)
         ((= (length str) 1) nil)        ;one character
         ((string-match "\\`[rf] *[0-9]*\\'" str) nil) ;r(edo) or f(ail)
         (t t)))
@@ -1127,6 +1177,8 @@
   "Run an inferior Prolog process, input and output via buffer *prolog*.
 With prefix argument ARG, restart the Prolog process if running before."
   (interactive "P")
+  ;; FIXME: It should be possible to interactively specify the command to use
+  ;; to run prolog.
   (if (and arg (get-process "prolog"))
       (progn
         (process-send-string "prolog" "halt.\n")
@@ -1143,18 +1195,55 @@
     (prolog-ensure-process)
     ))
 
+(defun prolog-inferior-guess-flavor (&optional ignored)
+  (setq prolog-system
+        (when (or (numberp prolog-system) (markerp prolog-system))
+          (save-excursion
+            (goto-char (1+ prolog-system))
+            (cond
+             ((looking-at "GNU Prolog") 'gnu)
+             ((looking-at "Welcome to SWI-Prolog\\|%.*\\<swi_") 'swi)
+             ((looking-at ".*\n") nil) ;There's at least one line.
+             (t prolog-system)))))
+  (when (symbolp prolog-system)
+    (remove-hook 'comint-output-filter-functions
+                 'prolog-inferior-guess-flavor t)
+    (when prolog-system
+      (setq comint-prompt-regexp (prolog-prompt-regexp))
+      (if (eq prolog-system 'gnu)
+          (set (make-local-variable 'comint-process-echoes) t)))))
+
 (defun prolog-ensure-process (&optional wait)
   "If Prolog process is not running, run it.
 If the optional argument WAIT is non-nil, wait for Prolog prompt specified by
 the variable `prolog-prompt-regexp'."
-  (if (null prolog-program-name-i)
+  (if (null (prolog-program-name))
       (error "This Prolog system has defined no interpreter."))
   (if (comint-check-proc "*prolog*")
       ()
-    (apply 'make-comint "prolog" prolog-program-name-i nil
-           prolog-program-switches-i)
-    (with-current-buffer "*prolog*"
+    (with-current-buffer (get-buffer-create "*prolog*")
       (prolog-inferior-mode)
+      (apply 'make-comint-in-buffer "prolog" (current-buffer)
+             (prolog-program-name) nil (prolog-program-switches))
+      (unless prolog-system
+        ;; Setup auto-detection.
+        (set (make-local-variable 'prolog-system)
+             ;; Force re-detection.
+             (let* ((proc (get-buffer-process (current-buffer)))
+                    (pmark (and proc (marker-position (process-mark proc)))))
+               (cond
+                ((null pmark) (1- (point-min)))
+                ;; The use of insert-before-markers in comint.el together with
+                ;; the potential use of comint-truncate-buffer in the output
+                ;; filter, means that it's difficult to reliably keep track of
+                ;; the buffer position where the process's output started.
+                ;; If possible we use a marker at "start - 1", so that
+                ;; insert-before-marker at `start' won't shift it.  And if not,
+                ;; we fall back on using a plain integer.
+                ((> pmark (point-min)) (copy-marker (1- pmark)))
+                (t (1- pmark)))))
+        (add-hook 'comint-output-filter-functions
+                  'prolog-inferior-guess-flavor nil t))
       (if wait
           (progn
             (goto-char (point-max))
@@ -1162,10 +1251,16 @@
                 (save-excursion
                   (not
                    (re-search-backward
-                    (concat "\\(" prolog-prompt-regexp-i "\\)" "\\=")
+                    (concat "\\(" (prolog-prompt-regexp) "\\)" "\\=")
                     nil t)))
               (sit-for 0.1)))))))
 
+(defun prolog-inferior-buffer (&optional dont-run)
+  (or (get-buffer "*prolog*")
+      (unless dont-run
+        (prolog-ensure-process)
+        (get-buffer "*prolog*"))))
+
 (defun prolog-process-insert-string (process string)
   "Insert STRING into inferior Prolog buffer running PROCESS."
   ;; Copied from elisp manual, greek to me
@@ -1188,7 +1283,7 @@
 If COMPILEP is non-nil then use compilation, otherwise consulting."
    (prolog-ensure-process)
    ;(let ((tmpfile prolog-temp-filename)
-   (let ((tmpfile (prolog-bsts (prolog-temporary-file)))
+   (let ((tmpfile (prolog-temporary-file))
          ;(process (get-process "prolog"))
          (first-line (1+ (count-lines
                           (point-min)
@@ -1196,6 +1291,10 @@
                             (goto-char start)
                             (point))))))
      (write-region start end tmpfile)
+     (setq start (copy-marker start))
+     (with-current-buffer (prolog-inferior-buffer)
+       (compilation-forget-errors)
+       (compilation-fake-loc start tmpfile))
      (process-send-string
       "prolog" (prolog-build-prolog-command
                 compilep tmpfile (prolog-bsts buffer-file-name)
@@ -1218,19 +1317,21 @@
 If COMPILEP is non-nil then use compilation, otherwise consulting."
   (save-some-buffers)
   (prolog-ensure-process)
-  (let ((filename (prolog-bsts buffer-file-name)))
+  (with-current-buffer (prolog-inferior-buffer)
+    (compilation-forget-errors))
     (process-send-string
      "prolog" (prolog-build-prolog-command
-               compilep filename filename))
-    (prolog-goto-prolog-process-buffer)))
+             compilep buffer-file-name
+             (prolog-bsts buffer-file-name)))
+  (prolog-goto-prolog-process-buffer))
 
 
 ;;------------------------------------------------------------
 ;; Consulting and compiling
 ;;------------------------------------------------------------
 
-;;; Interactive interface functions, used by both the standard
-;;; and the experimental consultation and compilation functions
+;; Interactive interface functions, used by both the standard
+;; and the experimental consultation and compilation functions
 (defun prolog-consult-file ()
   "Consult file of current buffer."
   (interactive)
@@ -1321,9 +1422,12 @@
   "Make Prolog command for FILE compilation/consulting.
 If COMPILEP is non-nil, consider compilation, otherwise consulting."
   (let* ((compile-string
-          (if compilep prolog-compile-string-i prolog-consult-string-i))
+          ;; FIXME: If the process is not running yet, the auto-detection of
+          ;; prolog-system won't help here, so we should make sure
+          ;; we first run Prolog and then build the command.
+          (if compilep (prolog-compile-string) (prolog-consult-string)))
          (module (prolog-buffer-module))
-         (file-name (concat "'" file "'"))
+         (file-name (concat "'" (prolog-bsts file) "'"))
          (module-name (if module (concat "'" module "'")))
          (module-file (if module
                           (concat module-name ":" file-name)
@@ -1359,7 +1463,7 @@
       (setq compile-string (concat strbeg (format "%d" lineoffset) strend)))
     (concat compile-string "\n")))
 
-;;; The rest of this page is experimental code!
+;; The rest of this page is experimental code!
 
 ;; Global variables for process filter function
 (defvar prolog-process-flag nil
@@ -1395,14 +1499,20 @@
          (old-filter (process-filter process)))
     (with-current-buffer buffer
       (delete-region (point-min) (point-max))
+      ;; FIXME: Wasn't this supposed to use prolog-inferior-mode?
       (compilation-mode)
+      ;; FIXME: This doesn't seem to cooperate well with new(ish) compile.el.
       ;; Setting up font-locking for this buffer
       (set (make-local-variable 'font-lock-defaults)
            '(prolog-font-lock-keywords nil nil ((?_ . "w"))))
       (if (eq prolog-system 'sicstus)
-          (progn
+          ;; FIXME: This looks really problematic: not only is this using
+          ;; the old compilation-parse-errors-function, but
+          ;; prolog-parse-sicstus-compilation-errors only accepts one argument
+          ;; whereas compile.el calls it with 2 (and did so at least since
+          ;; Emacs-20).
             (set (make-local-variable 'compilation-parse-errors-function)
-                 'prolog-parse-sicstus-compilation-errors)))
+               'prolog-parse-sicstus-compilation-errors))
       (toggle-read-only 0)
       (insert command-string "\n"))
     (save-selected-window
@@ -1498,6 +1608,7 @@
 
       ;; If temporary files were used, then we change the error
       ;; messages to point to the original source file.
+      ;; FIXME: Use compilation-fake-loc instead.
       (cond
 
        ;; If the prolog process was in trace mode then it requires
@@ -1552,7 +1663,7 @@
       (insert output)))
 
   ;; If the prompt is visible, then the task is finished
-  (if (string-match prolog-prompt-regexp-i prolog-consult-compile-output)
+  (if (string-match (prolog-prompt-regexp) prolog-consult-compile-output)
       (setq prolog-process-flag nil)))
 
 (defun prolog-consult-compile-file (compilep)
@@ -1579,7 +1690,7 @@
     (write-region beg end file nil 'no-message)
     (write-region "\n" nil file t 'no-message)
     (prolog-consult-compile compilep file
-                            (if (looking-at "^") (1+ lines) lines))
+                            (if (bolp) (1+ lines) lines))
     (delete-file file)))
 
 (defun prolog-consult-compile-predicate (compilep)
@@ -1760,8 +1871,10 @@
                 0 'prolog-warning-face)))
           ;; Inferior mode specific patterns
           (prompt
-           (list prolog-prompt-regexp-i 0 'font-lock-keyword-face))
+           ;; FIXME: Should be handled by comint already.
+           (list (prolog-prompt-regexp) 0 'font-lock-keyword-face))
           (trace-exit
+           ;; FIXME: Add to compilation-error-regexp-alist instead.
            (cond
             ((eq prolog-system 'sicstus)
              '("[ \t]*[0-9]+[ \t]+[0-9]+[ \t]*\\(Exit\\):"
@@ -1770,6 +1883,7 @@
              '("[ \t]*\\(Exit\\):[ \t]*([ \t0-9]*)" 1 prolog-exit-face))
             (t nil)))
           (trace-fail
+           ;; FIXME: Add to compilation-error-regexp-alist instead.
            (cond
             ((eq prolog-system 'sicstus)
              '("[ \t]*[0-9]+[ \t]+[0-9]+[ \t]*\\(Fail\\):"
@@ -1778,6 +1892,7 @@
              '("[ \t]*\\(Fail\\):[ \t]*([ \t0-9]*)" 1 prolog-warning-face))
             (t nil)))
           (trace-redo
+           ;; FIXME: Add to compilation-error-regexp-alist instead.
            (cond
             ((eq prolog-system 'sicstus)
              '("[ \t]*[0-9]+[ \t]+[0-9]+[ \t]*\\(Redo\\):"
@@ -1786,6 +1901,7 @@
              '("[ \t]*\\(Redo\\):[ \t]*([ \t0-9]*)" 1 prolog-redo-face))
             (t nil)))
           (trace-call
+           ;; FIXME: Add to compilation-error-regexp-alist instead.
            (cond
             ((eq prolog-system 'sicstus)
              '("[ \t]*[0-9]+[ \t]+[0-9]+[ \t]*\\(Call\\):"
@@ -1795,6 +1911,7 @@
                1 font-lock-function-name-face))
             (t nil)))
           (trace-exception
+           ;; FIXME: Add to compilation-error-regexp-alist instead.
            (cond
             ((eq prolog-system 'sicstus)
              '("[ \t]*[0-9]+[ \t]+[0-9]+[ \t]*\\(Exception\\):"
@@ -1804,6 +1921,7 @@
                1 prolog-exception-face))
             (t nil)))
           (error-message-identifier
+           ;; FIXME: Add to compilation-error-regexp-alist instead.
            (cond
             ((eq prolog-system 'sicstus)
              '("{\\([A-Z]* ?ERROR:\\)" 1 prolog-exception-face prepend))
@@ -1811,6 +1929,7 @@
              '("^[[]\\(WARNING:\\)" 1 prolog-builtin-face prepend))
             (t nil)))
           (error-whole-messages
+           ;; FIXME: Add to compilation-error-regexp-alist instead.
            (cond
             ((eq prolog-system 'sicstus)
              '("{\\([A-Z]* ?ERROR:.*\\)}[ \t]*$"
@@ -1819,6 +1938,7 @@
              '("^[[]WARNING:[^]]*[]]$" 0 font-lock-comment-face append))
             (t nil)))
           (error-warning-messages
+           ;; FIXME: Add to compilation-error-regexp-alist instead.
            ;; Mostly errors that SICStus asks the user about how to solve,
            ;; such as "NAME CLASH:" for example.
            (cond
@@ -1826,6 +1946,7 @@
              '("^[A-Z ]*[A-Z]+:" 0 prolog-warning-face))
             (t nil)))
           (warning-messages
+           ;; FIXME: Add to compilation-error-regexp-alist instead.
            (cond
             ((eq prolog-system 'sicstus)
              '("\\({ ?\\(Warning\\|WARNING\\) ?:.*}\\)[ \t]*$"
@@ -2974,6 +3095,9 @@
   "Enable zipping (for SICStus 3.7 and later).
 When called with prefix argument ARG, disable zipping instead."
   (interactive "P")
+  (if (not (and (eq prolog-system 'sicstus)
+                (prolog-atleast-version '(3 . 7))))
+      (error "Only works for SICStus 3.7 and later"))
   (if arg
       (prolog-zip-off)
     (prolog-process-insert-string (get-process "prolog")


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