Emulate POSIX_SIGNALS on MS-Windows.

[gnu-emacs] / lisp / emacs-lisp / derived.el

diff --git a/lisp/emacs-lisp/derived.el b/lisp/emacs-lisp/derived.el
index f5a17f3abf17e2a67999177c81d8b59ece109124..d6f717ccda754bba68b55656a83c0c1c3f564db4 100644 (file)
--- a/lisp/emacs-lisp/derived.el
+++ b/lisp/emacs-lisp/derived.el
@@ -1,8 +1,8 @@
 ;;; derived.el --- allow inheritance of major modes
 ;; (formerly mode-clone.el)
 
-;; Copyright (C) 1993, 1994, 1999, 2001, 2002, 2003, 2004,
-;;   2005, 2006, 2007, 2008 Free Software Foundation, Inc.
+;; Copyright (C) 1993, 1994, 1999, 2001, 2002, 2003, 2004, 2005, 2006,
+;;   2007, 2008, 2009, 2010  Free Software Foundation, Inc.
 
 ;; Author: David Megginson (dmeggins@aix1.uottawa.ca)
 ;; Maintainer: FSF
@@ -10,10 +10,10 @@
 
 ;; This file is part of GNU Emacs.
 
-;; GNU Emacs is free software; you can redistribute it and/or modify
+;; GNU Emacs is free software: you can redistribute it and/or modify
 ;; it under the terms of the GNU General Public License as published by
-;; the Free Software Foundation; either version 3, or (at your option)
-;; any later version.
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
 
 ;; GNU Emacs is distributed in the hope that it will be useful,
 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -21,9 +21,7 @@
 ;; GNU General Public License for more details.
 
 ;; You should have received a copy of the GNU General Public License
-;; along with GNU Emacs; see the file COPYING.  If not, write to the
-;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
-;; Boston, MA 02110-1301, USA.
+;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
 \f
 ;;; Commentary:
 
@@ -164,7 +162,8 @@ The new mode runs the hook constructed by the function
 
 See Info node `(elisp)Derived Modes' for more details."
   (declare (debug (&define name symbolp sexp [&optional stringp]
-                          [&rest keywordp sexp] def-body)))
+                          [&rest keywordp sexp] def-body))
+          (doc-string 4))
 
   (when (and docstring (not (stringp docstring)))
     ;; Some trickiness, since what appears to be the docstring may really be
@@ -194,25 +193,34 @@ See Info node `(elisp)Derived Modes' for more details."
                     parent child docstring syntax abbrev))
 
     `(progn
-       (unless (get  ',hook 'variable-documentation)
+       (unless (get ',hook 'variable-documentation)
         (put ',hook 'variable-documentation
-             ,(format "Hook run when entering %s mode.
+             (purecopy ,(format "Hook run when entering %s mode.
 No problems result if this variable is not bound.
 `add-hook' automatically binds it.  (This is true for all hook variables.)"
-                      name)))
+                      name))))
        (unless (boundp ',map)
         (put ',map 'definition-name ',child))
        (defvar ,map (make-sparse-keymap))
+       (unless (get ',map 'variable-documentation)
+        (put ',map 'variable-documentation
+             (purecopy ,(format "Keymap for `%s'." child))))
        ,(if declare-syntax
            `(progn
               (unless (boundp ',syntax)
                 (put ',syntax 'definition-name ',child))
-              (defvar ,syntax (make-syntax-table))))
+              (defvar ,syntax (make-syntax-table))
+              (unless (get ',syntax 'variable-documentation)
+                (put ',syntax 'variable-documentation
+                     (purecopy ,(format "Syntax table for `%s'." child))))))
        ,(if declare-abbrev
            `(progn
               (put ',abbrev 'definition-name ',child)
               (defvar ,abbrev
-                (progn (define-abbrev-table ',abbrev nil) ,abbrev))))
+                (progn (define-abbrev-table ',abbrev nil) ,abbrev))
+              (unless (get ',abbrev 'variable-documentation)
+                (put ',abbrev 'variable-documentation
+                     (purecopy ,(format "Abbrev table for `%s'." child))))))
        (put ',child 'derived-mode-parent ',parent)
        ,(if group `(put ',child 'custom-mode-group ,group))
 
@@ -222,7 +230,7 @@ No problems result if this variable is not bound.
                                        ; Run the parent.
         (delay-mode-hooks
 
-         (,(or parent 'kill-all-local-variables))
+         (,(or parent 'fundamental-mode))
                                        ; Identify the child mode.
          (setq major-mode (quote ,child))
          (setq mode-name ,name)