;;; backquote.el --- implement the ` Lisp construct
-;;; Copyright (C) 1990, 1992, 1994, 2001 Free Software Foundation, Inc.
+;; Copyright (C) 1990, 1992, 1994, 2001, 2002, 2003, 2004,
+;; 2005, 2006 Free Software Foundation, Inc.
;; Author: Rick Sladkey <jrs@world.std.com>
;; Maintainer: FSF
;; 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., 59 Temple Place - Suite 330,
-;; Boston, MA 02111-1307, USA.
+;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
;;; Commentary:
"Like `list' but the last argument is the tail of the new list.
For example (backquote-list* 'a 'b 'c) => (a b . c)"
+ ;; The recursive solution is much nicer:
+ ;; (if list (cons first (apply 'backquote-list*-function list)) first))
+ ;; but Emacs is not very good at efficiently processing recursion.
(if list
(let* ((rest list) (newlist (cons first nil)) (last newlist))
(while (cdr rest)
"Like `list' but the last argument is the tail of the new list.
For example (backquote-list* 'a 'b 'c) => (a b . c)"
- (setq list (reverse (cons first list))
+ ;; The recursive solution is much nicer:
+ ;; (if list (list 'cons first (cons 'backquote-list*-macro list)) first))
+ ;; but Emacs is not very good at efficiently processing such things.
+ (setq list (nreverse (cons first list))
first (car list)
list (cdr list))
(if list