source: branches/streams/abcl/src/org/armedbear/lisp/do-all-symbols.lisp

;;; do-all-symbols.lisp
;;;
;;; Copyright (C) 2003-2005 Peter Graves
;;; $Id: do-all-symbols.lisp 11776 2009-04-21 20:56:11Z ehuelsmann $
;;;
;;; This program 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 2
;;; of the License, or (at your option) any later version.
;;;
;;; This program is distributed in the hope that it will be useful,
;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with this program; if not, write to the Free Software
;;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
;;;
;;; As a special exception, the copyright holders of this library give you
;;; permission to link this library with independent modules to produce an
;;; executable, regardless of the license terms of these independent
;;; modules, and to copy and distribute the resulting executable under
;;; terms of your choice, provided that you also meet, for each linked
;;; independent module, the terms and conditions of the license of that
;;; module.  An independent module is a module which is not derived from
;;; or based on this library.  If you modify this library, you may extend
;;; this exception to your version of the library, but you are not
;;; obligated to do so.  If you do not wish to do so, delete this
;;; exception statement from your version.

;;; Adapted from SBCL.

(in-package #:system)

(defmacro do-all-symbols ((var &optional result-form) &body body)
  (multiple-value-bind (forms decls) (parse-body body nil)
    (let ((flet-name (gensym "DO-SYMBOLS-")))
      `(block nil
         (flet ((,flet-name (,var)
                 ,@decls
                 (tagbody ,@forms)))
           (mapc #'(lambda (package) 
                     (flet ((iterate-over-symbols (symbols)
                              (mapc #',flet-name symbols)))
                       (iterate-over-symbols
                        (package-internal-symbols package))
                       (iterate-over-symbols
                        (package-external-symbols package))))
                 (list-all-packages)))
         (let ((,var nil))
           (declare (ignorable ,var))
           ,@decls
           ,result-form)))))